diff --git a/.clang_complete b/.clang_complete
new file mode 100644
index 0000000000000000000000000000000000000000..79d0946b3320cb8732546341714e0686bdfcc08d
--- /dev/null
+++ b/.clang_complete
@@ -0,0 +1,8 @@
+-Ithird_party/googletest/include
+-Ithird_party/googletest
+-Iinclude
+-Igens
+-I.
+-Ithird_party/boringssl/include
+-Ithird_party/zlib
+-Ithird_party/protobuf/src
diff --git a/.gitmodules b/.gitmodules
index c37d0abdf0bdf70f9b97f16bf7ae6010d16c6eb5..c85a53943a743cb9da64bd301ed46ff73f175adc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,7 +13,7 @@
 	url = https://github.com/google/googletest.git
 [submodule "third_party/boringssl"]
 	path = third_party/boringssl
-	url = https://boringssl.googlesource.com/boringssl
+	url = https://github.com/google/boringssl.git
 [submodule "third_party/nanopb"]
 	path = third_party/nanopb
 	url = https://github.com/nanopb/nanopb.git
diff --git a/BUILD b/BUILD
index 659e79a1e0e6f9112c48e64ebf55570341c022b1..976bfb62b07315004b295569913b84286285a7ee 100644
--- a/BUILD
+++ b/BUILD
@@ -158,10 +158,11 @@ cc_library(
   name = "grpc",
   srcs = [
     "src/core/census/grpc_filter.h",
+    "src/core/census/grpc_plugin.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
+    "src/core/channel/channel_stack_builder.h",
     "src/core/channel/client_channel.h",
-    "src/core/channel/client_uchannel.h",
     "src/core/channel/compress_filter.h",
     "src/core/channel/connected_channel.h",
     "src/core/channel/context.h",
@@ -189,9 +190,9 @@ cc_library(
     "src/core/compression/algorithm_metadata.h",
     "src/core/compression/message_compress.h",
     "src/core/debug/trace.h",
-    "src/core/httpcli/format_request.h",
-    "src/core/httpcli/httpcli.h",
-    "src/core/httpcli/parser.h",
+    "src/core/http/format_request.h",
+    "src/core/http/httpcli.h",
+    "src/core/http/parser.h",
     "src/core/iomgr/closure.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
@@ -223,6 +224,7 @@ cc_library(
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
     "src/core/iomgr/udp_server.h",
+    "src/core/iomgr/unix_sockets_posix.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
     "src/core/iomgr/workqueue.h",
@@ -239,9 +241,12 @@ cc_library(
     "src/core/surface/call.h",
     "src/core/surface/call_test_only.h",
     "src/core/surface/channel.h",
+    "src/core/surface/channel_init.h",
+    "src/core/surface/channel_stack_type.h",
     "src/core/surface/completion_queue.h",
     "src/core/surface/event_string.h",
     "src/core/surface/init.h",
+    "src/core/surface/lame_client.h",
     "src/core/surface/server.h",
     "src/core/surface/surface_trace.h",
     "src/core/transport/byte_stream.h",
@@ -295,10 +300,11 @@ cc_library(
     "third_party/nanopb/pb_encode.h",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
+    "src/core/census/grpc_plugin.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
+    "src/core/channel/channel_stack_builder.c",
     "src/core/channel/client_channel.c",
-    "src/core/channel/client_uchannel.c",
     "src/core/channel/compress_filter.c",
     "src/core/channel/connected_channel.c",
     "src/core/channel/http_client_filter.c",
@@ -326,9 +332,9 @@ cc_library(
     "src/core/compression/compression_algorithm.c",
     "src/core/compression/message_compress.c",
     "src/core/debug/trace.c",
-    "src/core/httpcli/format_request.c",
-    "src/core/httpcli/httpcli.c",
-    "src/core/httpcli/parser.c",
+    "src/core/http/format_request.c",
+    "src/core/http/httpcli.c",
+    "src/core/http/parser.c",
     "src/core/iomgr/closure.c",
     "src/core/iomgr/endpoint.c",
     "src/core/iomgr/endpoint_pair_posix.c",
@@ -363,6 +369,8 @@ cc_library(
     "src/core/iomgr/timer.c",
     "src/core/iomgr/timer_heap.c",
     "src/core/iomgr/udp_server.c",
+    "src/core/iomgr/unix_sockets_posix.c",
+    "src/core/iomgr/unix_sockets_posix_noop.c",
     "src/core/iomgr/wakeup_fd_eventfd.c",
     "src/core/iomgr/wakeup_fd_nospecial.c",
     "src/core/iomgr/wakeup_fd_pipe.c",
@@ -384,7 +392,9 @@ cc_library(
     "src/core/surface/channel.c",
     "src/core/surface/channel_connectivity.c",
     "src/core/surface/channel_create.c",
+    "src/core/surface/channel_init.c",
     "src/core/surface/channel_ping.c",
+    "src/core/surface/channel_stack_type.c",
     "src/core/surface/completion_queue.c",
     "src/core/surface/event_string.c",
     "src/core/surface/init.c",
@@ -392,7 +402,6 @@ cc_library(
     "src/core/surface/metadata_array.c",
     "src/core/surface/server.c",
     "src/core/surface/server_chttp2.c",
-    "src/core/surface/server_create.c",
     "src/core/surface/validate_metadata.c",
     "src/core/surface/version.c",
     "src/core/transport/byte_stream.c",
@@ -423,7 +432,7 @@ cc_library(
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
-    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/http/httpcli_security_connector.c",
     "src/core/security/b64.c",
     "src/core/security/client_auth_filter.c",
     "src/core/security/credentials.c",
@@ -524,10 +533,11 @@ cc_library(
   name = "grpc_unsecure",
   srcs = [
     "src/core/census/grpc_filter.h",
+    "src/core/census/grpc_plugin.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
+    "src/core/channel/channel_stack_builder.h",
     "src/core/channel/client_channel.h",
-    "src/core/channel/client_uchannel.h",
     "src/core/channel/compress_filter.h",
     "src/core/channel/connected_channel.h",
     "src/core/channel/context.h",
@@ -555,9 +565,9 @@ cc_library(
     "src/core/compression/algorithm_metadata.h",
     "src/core/compression/message_compress.h",
     "src/core/debug/trace.h",
-    "src/core/httpcli/format_request.h",
-    "src/core/httpcli/httpcli.h",
-    "src/core/httpcli/parser.h",
+    "src/core/http/format_request.h",
+    "src/core/http/httpcli.h",
+    "src/core/http/parser.h",
     "src/core/iomgr/closure.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
@@ -589,6 +599,7 @@ cc_library(
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
     "src/core/iomgr/udp_server.h",
+    "src/core/iomgr/unix_sockets_posix.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
     "src/core/iomgr/workqueue.h",
@@ -605,9 +616,12 @@ cc_library(
     "src/core/surface/call.h",
     "src/core/surface/call_test_only.h",
     "src/core/surface/channel.h",
+    "src/core/surface/channel_init.h",
+    "src/core/surface/channel_stack_type.h",
     "src/core/surface/completion_queue.h",
     "src/core/surface/event_string.h",
     "src/core/surface/init.h",
+    "src/core/surface/lame_client.h",
     "src/core/surface/server.h",
     "src/core/surface/surface_trace.h",
     "src/core/transport/byte_stream.h",
@@ -648,10 +662,11 @@ cc_library(
     "src/core/surface/init_unsecure.c",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
+    "src/core/census/grpc_plugin.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
+    "src/core/channel/channel_stack_builder.c",
     "src/core/channel/client_channel.c",
-    "src/core/channel/client_uchannel.c",
     "src/core/channel/compress_filter.c",
     "src/core/channel/connected_channel.c",
     "src/core/channel/http_client_filter.c",
@@ -679,9 +694,9 @@ cc_library(
     "src/core/compression/compression_algorithm.c",
     "src/core/compression/message_compress.c",
     "src/core/debug/trace.c",
-    "src/core/httpcli/format_request.c",
-    "src/core/httpcli/httpcli.c",
-    "src/core/httpcli/parser.c",
+    "src/core/http/format_request.c",
+    "src/core/http/httpcli.c",
+    "src/core/http/parser.c",
     "src/core/iomgr/closure.c",
     "src/core/iomgr/endpoint.c",
     "src/core/iomgr/endpoint_pair_posix.c",
@@ -716,6 +731,8 @@ cc_library(
     "src/core/iomgr/timer.c",
     "src/core/iomgr/timer_heap.c",
     "src/core/iomgr/udp_server.c",
+    "src/core/iomgr/unix_sockets_posix.c",
+    "src/core/iomgr/unix_sockets_posix_noop.c",
     "src/core/iomgr/wakeup_fd_eventfd.c",
     "src/core/iomgr/wakeup_fd_nospecial.c",
     "src/core/iomgr/wakeup_fd_pipe.c",
@@ -737,7 +754,9 @@ cc_library(
     "src/core/surface/channel.c",
     "src/core/surface/channel_connectivity.c",
     "src/core/surface/channel_create.c",
+    "src/core/surface/channel_init.c",
     "src/core/surface/channel_ping.c",
+    "src/core/surface/channel_stack_type.c",
     "src/core/surface/completion_queue.c",
     "src/core/surface/event_string.c",
     "src/core/surface/init.c",
@@ -745,7 +764,6 @@ cc_library(
     "src/core/surface/metadata_array.c",
     "src/core/surface/server.c",
     "src/core/surface/server_chttp2.c",
-    "src/core/surface/server_create.c",
     "src/core/surface/validate_metadata.c",
     "src/core/surface/version.c",
     "src/core/transport/byte_stream.c",
@@ -1346,10 +1364,11 @@ objc_library(
   srcs = [
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
+    "src/core/census/grpc_plugin.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
+    "src/core/channel/channel_stack_builder.c",
     "src/core/channel/client_channel.c",
-    "src/core/channel/client_uchannel.c",
     "src/core/channel/compress_filter.c",
     "src/core/channel/connected_channel.c",
     "src/core/channel/http_client_filter.c",
@@ -1377,9 +1396,9 @@ objc_library(
     "src/core/compression/compression_algorithm.c",
     "src/core/compression/message_compress.c",
     "src/core/debug/trace.c",
-    "src/core/httpcli/format_request.c",
-    "src/core/httpcli/httpcli.c",
-    "src/core/httpcli/parser.c",
+    "src/core/http/format_request.c",
+    "src/core/http/httpcli.c",
+    "src/core/http/parser.c",
     "src/core/iomgr/closure.c",
     "src/core/iomgr/endpoint.c",
     "src/core/iomgr/endpoint_pair_posix.c",
@@ -1414,6 +1433,8 @@ objc_library(
     "src/core/iomgr/timer.c",
     "src/core/iomgr/timer_heap.c",
     "src/core/iomgr/udp_server.c",
+    "src/core/iomgr/unix_sockets_posix.c",
+    "src/core/iomgr/unix_sockets_posix_noop.c",
     "src/core/iomgr/wakeup_fd_eventfd.c",
     "src/core/iomgr/wakeup_fd_nospecial.c",
     "src/core/iomgr/wakeup_fd_pipe.c",
@@ -1435,7 +1456,9 @@ objc_library(
     "src/core/surface/channel.c",
     "src/core/surface/channel_connectivity.c",
     "src/core/surface/channel_create.c",
+    "src/core/surface/channel_init.c",
     "src/core/surface/channel_ping.c",
+    "src/core/surface/channel_stack_type.c",
     "src/core/surface/completion_queue.c",
     "src/core/surface/event_string.c",
     "src/core/surface/init.c",
@@ -1443,7 +1466,6 @@ objc_library(
     "src/core/surface/metadata_array.c",
     "src/core/surface/server.c",
     "src/core/surface/server_chttp2.c",
-    "src/core/surface/server_create.c",
     "src/core/surface/validate_metadata.c",
     "src/core/surface/version.c",
     "src/core/transport/byte_stream.c",
@@ -1474,7 +1496,7 @@ objc_library(
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
-    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/http/httpcli_security_connector.c",
     "src/core/security/b64.c",
     "src/core/security/client_auth_filter.c",
     "src/core/security/credentials.c",
@@ -1520,10 +1542,11 @@ objc_library(
     "include/grpc/impl/codegen/status.h",
     "include/grpc/census.h",
     "src/core/census/grpc_filter.h",
+    "src/core/census/grpc_plugin.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
+    "src/core/channel/channel_stack_builder.h",
     "src/core/channel/client_channel.h",
-    "src/core/channel/client_uchannel.h",
     "src/core/channel/compress_filter.h",
     "src/core/channel/connected_channel.h",
     "src/core/channel/context.h",
@@ -1551,9 +1574,9 @@ objc_library(
     "src/core/compression/algorithm_metadata.h",
     "src/core/compression/message_compress.h",
     "src/core/debug/trace.h",
-    "src/core/httpcli/format_request.h",
-    "src/core/httpcli/httpcli.h",
-    "src/core/httpcli/parser.h",
+    "src/core/http/format_request.h",
+    "src/core/http/httpcli.h",
+    "src/core/http/parser.h",
     "src/core/iomgr/closure.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
@@ -1585,6 +1608,7 @@ objc_library(
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
     "src/core/iomgr/udp_server.h",
+    "src/core/iomgr/unix_sockets_posix.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
     "src/core/iomgr/workqueue.h",
@@ -1601,9 +1625,12 @@ objc_library(
     "src/core/surface/call.h",
     "src/core/surface/call_test_only.h",
     "src/core/surface/channel.h",
+    "src/core/surface/channel_init.h",
+    "src/core/surface/channel_stack_type.h",
     "src/core/surface/completion_queue.h",
     "src/core/surface/event_string.h",
     "src/core/surface/init.h",
+    "src/core/surface/lame_client.h",
     "src/core/surface/server.h",
     "src/core/surface/surface_trace.h",
     "src/core/transport/byte_stream.h",
diff --git a/MANIFEST.md b/MANIFEST.md
index b523f8f6fa5ed620d92e8e07d8b612d7a941968d..77e014002d96560cef7399db297caf0a8800417a 100644
--- a/MANIFEST.md
+++ b/MANIFEST.md
@@ -1,14 +1,28 @@
 # Top-level Items by language
 
+## Bazel
+* [grpc.bzl](grpc.bzl)
+
 ## Node
 * [binding.gyp](binding.gyp)
+* [package.json](package.json)
 
 ## Objective-C
 * [gRPC.podspec](gRPC.podspec)
 
+## PHP
+* [composer.json](composer.json)
+* [config.m4](config.m4)
+* [package.xml](package.xml)
+
 ## Python
 * [requirements.txt](requirements.txt)
 * [setup.cfg](setup.cfg)
 * [setup.py](setup.py)
 * [tox.ini](tox.ini)
 * [PYTHON-MANIFEST.in](PYTHON-MANIFEST.in)
+
+## Ruby
+* [Gemfile](Gemfile)
+* [grpc.gemspec](grpc.gemspec)
+* [Rakefile](Rakefile)
diff --git a/Makefile b/Makefile
index 44a4b12bac5568a8fe36118099f1cac9e6ac267b..007e3ab124f0b5d66c04982c462071e19c331c07 100644
--- a/Makefile
+++ b/Makefile
@@ -188,8 +188,8 @@ CC_tsan = clang
 CXX_tsan = clang++
 LD_tsan = clang
 LDXX_tsan = clang++
-CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
-LDFLAGS_tsan = -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
+CPPFLAGS_tsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
+LDFLAGS_tsan = -fsanitize=thread
 DEFINES_tsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=5
 
 VALID_CONFIG_stapprof = 1
@@ -225,8 +225,8 @@ CC_etsan = clang
 CXX_etsan = clang++
 LD_etsan = clang
 LDXX_etsan = clang++
-CPPFLAGS_etsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
-LDFLAGS_etsan = -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
+CPPFLAGS_etsan = -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument -DGPR_NO_DIRECT_SYSCALLS
+LDFLAGS_etsan = -fsanitize=thread
 DEFINES_etsan = _DEBUG DEBUG GRPC_EXECUTION_CONTEXT_SANITIZER
 DEFINES_etsan += GRPC_TEST_SLOWDOWN_BUILD_FACTOR=5
 
@@ -927,8 +927,8 @@ grpc_security_connector_test: $(BINDIR)/$(CONFIG)/grpc_security_connector_test
 grpc_verify_jwt: $(BINDIR)/$(CONFIG)/grpc_verify_jwt
 hpack_parser_test: $(BINDIR)/$(CONFIG)/hpack_parser_test
 hpack_table_test: $(BINDIR)/$(CONFIG)/hpack_table_test
+http_parser_test: $(BINDIR)/$(CONFIG)/http_parser_test
 httpcli_format_request_test: $(BINDIR)/$(CONFIG)/httpcli_format_request_test
-httpcli_parser_test: $(BINDIR)/$(CONFIG)/httpcli_parser_test
 httpcli_test: $(BINDIR)/$(CONFIG)/httpcli_test
 httpscli_test: $(BINDIR)/$(CONFIG)/httpscli_test
 init_test: $(BINDIR)/$(CONFIG)/init_test
@@ -1020,6 +1020,7 @@ thread_stress_test: $(BINDIR)/$(CONFIG)/thread_stress_test
 zookeeper_test: $(BINDIR)/$(CONFIG)/zookeeper_test
 public_headers_must_be_c89: $(BINDIR)/$(CONFIG)/public_headers_must_be_c89
 boringssl_aes_test: $(BINDIR)/$(CONFIG)/boringssl_aes_test
+boringssl_asn1_test: $(BINDIR)/$(CONFIG)/boringssl_asn1_test
 boringssl_base64_test: $(BINDIR)/$(CONFIG)/boringssl_base64_test
 boringssl_bio_test: $(BINDIR)/$(CONFIG)/boringssl_bio_test
 boringssl_bn_test: $(BINDIR)/$(CONFIG)/boringssl_bn_test
@@ -1074,6 +1075,7 @@ h2_full_test: $(BINDIR)/$(CONFIG)/h2_full_test
 h2_full+pipe_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_test
 h2_full+poll_test: $(BINDIR)/$(CONFIG)/h2_full+poll_test
 h2_full+poll+pipe_test: $(BINDIR)/$(CONFIG)/h2_full+poll+pipe_test
+h2_full+trace_test: $(BINDIR)/$(CONFIG)/h2_full+trace_test
 h2_oauth2_test: $(BINDIR)/$(CONFIG)/h2_oauth2_test
 h2_proxy_test: $(BINDIR)/$(CONFIG)/h2_proxy_test
 h2_sockpair_test: $(BINDIR)/$(CONFIG)/h2_sockpair_test
@@ -1082,7 +1084,6 @@ h2_sockpair_1byte_test: $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_test
 h2_ssl_test: $(BINDIR)/$(CONFIG)/h2_ssl_test
 h2_ssl+poll_test: $(BINDIR)/$(CONFIG)/h2_ssl+poll_test
 h2_ssl_proxy_test: $(BINDIR)/$(CONFIG)/h2_ssl_proxy_test
-h2_uchannel_test: $(BINDIR)/$(CONFIG)/h2_uchannel_test
 h2_uds_test: $(BINDIR)/$(CONFIG)/h2_uds_test
 h2_uds+poll_test: $(BINDIR)/$(CONFIG)/h2_uds+poll_test
 h2_census_nosec_test: $(BINDIR)/$(CONFIG)/h2_census_nosec_test
@@ -1091,11 +1092,11 @@ h2_full_nosec_test: $(BINDIR)/$(CONFIG)/h2_full_nosec_test
 h2_full+pipe_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test
 h2_full+poll_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+poll_nosec_test
 h2_full+poll+pipe_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+poll+pipe_nosec_test
+h2_full+trace_nosec_test: $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test
 h2_proxy_nosec_test: $(BINDIR)/$(CONFIG)/h2_proxy_nosec_test
 h2_sockpair_nosec_test: $(BINDIR)/$(CONFIG)/h2_sockpair_nosec_test
 h2_sockpair+trace_nosec_test: $(BINDIR)/$(CONFIG)/h2_sockpair+trace_nosec_test
 h2_sockpair_1byte_nosec_test: $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_nosec_test
-h2_uchannel_nosec_test: $(BINDIR)/$(CONFIG)/h2_uchannel_nosec_test
 h2_uds_nosec_test: $(BINDIR)/$(CONFIG)/h2_uds_nosec_test
 h2_uds+poll_nosec_test: $(BINDIR)/$(CONFIG)/h2_uds+poll_nosec_test
 
@@ -1169,7 +1170,7 @@ pc_cxx: $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++.pc
 
 pc_cxx_unsecure: $(LIBDIR)/$(CONFIG)/pkgconfig/grpc++_unsecure.pc
 
-privatelibs_cxx:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a $(LIBDIR)/$(CONFIG)/libinterop_client_main.a $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a $(LIBDIR)/$(CONFIG)/libinterop_server_main.a $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
+privatelibs_cxx:  $(LIBDIR)/$(CONFIG)/libgrpc++_test_config.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libinterop_client_helper.a $(LIBDIR)/$(CONFIG)/libinterop_client_main.a $(LIBDIR)/$(CONFIG)/libinterop_server_helper.a $(LIBDIR)/$(CONFIG)/libinterop_server_main.a $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a $(LIBDIR)/$(CONFIG)/libboringssl_aes_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_base64_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bio_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bn_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_bytestring_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_aead_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_cipher_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_cmac_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ed25519_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_x25519_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_dh_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_digest_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ec_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ecdsa_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_err_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_evp_extra_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_evp_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pbkdf_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_hmac_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pkcs12_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_pkcs8_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_poly1305_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_rsa_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_ssl_test_lib.a
 
 ifeq ($(HAS_ZOOKEEPER),true)
 privatelibs_zookeeper: 
@@ -1235,8 +1236,8 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/grpc_security_connector_test \
   $(BINDIR)/$(CONFIG)/hpack_parser_test \
   $(BINDIR)/$(CONFIG)/hpack_table_test \
+  $(BINDIR)/$(CONFIG)/http_parser_test \
   $(BINDIR)/$(CONFIG)/httpcli_format_request_test \
-  $(BINDIR)/$(CONFIG)/httpcli_parser_test \
   $(BINDIR)/$(CONFIG)/httpcli_test \
   $(BINDIR)/$(CONFIG)/httpscli_test \
   $(BINDIR)/$(CONFIG)/init_test \
@@ -1295,6 +1296,7 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_test \
   $(BINDIR)/$(CONFIG)/h2_full+poll_test \
   $(BINDIR)/$(CONFIG)/h2_full+poll+pipe_test \
+  $(BINDIR)/$(CONFIG)/h2_full+trace_test \
   $(BINDIR)/$(CONFIG)/h2_oauth2_test \
   $(BINDIR)/$(CONFIG)/h2_proxy_test \
   $(BINDIR)/$(CONFIG)/h2_sockpair_test \
@@ -1303,7 +1305,6 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/h2_ssl_test \
   $(BINDIR)/$(CONFIG)/h2_ssl+poll_test \
   $(BINDIR)/$(CONFIG)/h2_ssl_proxy_test \
-  $(BINDIR)/$(CONFIG)/h2_uchannel_test \
   $(BINDIR)/$(CONFIG)/h2_uds_test \
   $(BINDIR)/$(CONFIG)/h2_uds+poll_test \
   $(BINDIR)/$(CONFIG)/h2_census_nosec_test \
@@ -1312,11 +1313,11 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/h2_full+pipe_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+poll_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_full+poll+pipe_nosec_test \
+  $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_proxy_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_sockpair_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_sockpair+trace_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_sockpair_1byte_nosec_test \
-  $(BINDIR)/$(CONFIG)/h2_uchannel_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_uds_nosec_test \
   $(BINDIR)/$(CONFIG)/h2_uds+poll_nosec_test \
 
@@ -1365,6 +1366,7 @@ buildtests_cxx: buildtests_zookeeper privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/sync_unary_ping_pong_test \
   $(BINDIR)/$(CONFIG)/thread_stress_test \
   $(BINDIR)/$(CONFIG)/boringssl_aes_test \
+  $(BINDIR)/$(CONFIG)/boringssl_asn1_test \
   $(BINDIR)/$(CONFIG)/boringssl_base64_test \
   $(BINDIR)/$(CONFIG)/boringssl_bio_test \
   $(BINDIR)/$(CONFIG)/boringssl_bn_test \
@@ -1520,10 +1522,10 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/hpack_parser_test || ( echo test hpack_parser_test failed ; exit 1 )
 	$(E) "[RUN]     Testing hpack_table_test"
 	$(Q) $(BINDIR)/$(CONFIG)/hpack_table_test || ( echo test hpack_table_test failed ; exit 1 )
+	$(E) "[RUN]     Testing http_parser_test"
+	$(Q) $(BINDIR)/$(CONFIG)/http_parser_test || ( echo test http_parser_test failed ; exit 1 )
 	$(E) "[RUN]     Testing httpcli_format_request_test"
 	$(Q) $(BINDIR)/$(CONFIG)/httpcli_format_request_test || ( echo test httpcli_format_request_test failed ; exit 1 )
-	$(E) "[RUN]     Testing httpcli_parser_test"
-	$(Q) $(BINDIR)/$(CONFIG)/httpcli_parser_test || ( echo test httpcli_parser_test failed ; exit 1 )
 	$(E) "[RUN]     Testing httpcli_test"
 	$(Q) $(BINDIR)/$(CONFIG)/httpcli_test || ( echo test httpcli_test failed ; exit 1 )
 	$(E) "[RUN]     Testing httpscli_test"
@@ -1540,12 +1542,8 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/json_test || ( echo test json_test failed ; exit 1 )
 	$(E) "[RUN]     Testing lame_client_test"
 	$(Q) $(BINDIR)/$(CONFIG)/lame_client_test || ( echo test lame_client_test failed ; exit 1 )
-	$(E) "[RUN]     Testing lb_policies_test"
-	$(Q) $(BINDIR)/$(CONFIG)/lb_policies_test || ( echo test lb_policies_test failed ; exit 1 )
 	$(E) "[RUN]     Testing message_compress_test"
 	$(Q) $(BINDIR)/$(CONFIG)/message_compress_test || ( echo test message_compress_test failed ; exit 1 )
-	$(E) "[RUN]     Testing mlog_test"
-	$(Q) $(BINDIR)/$(CONFIG)/mlog_test || ( echo test mlog_test failed ; exit 1 )
 	$(E) "[RUN]     Testing multiple_server_queues_test"
 	$(Q) $(BINDIR)/$(CONFIG)/multiple_server_queues_test || ( echo test multiple_server_queues_test failed ; exit 1 )
 	$(E) "[RUN]     Testing murmur_hash_test"
@@ -1623,6 +1621,10 @@ test_c: buildtests_c
 
 
 flaky_test_c: buildtests_c
+	$(E) "[RUN]     Testing lb_policies_test"
+	$(Q) $(BINDIR)/$(CONFIG)/lb_policies_test || ( echo test lb_policies_test failed ; exit 1 )
+	$(E) "[RUN]     Testing mlog_test"
+	$(Q) $(BINDIR)/$(CONFIG)/mlog_test || ( echo test mlog_test failed ; exit 1 )
 
 
 test_cxx: test_zookeeper buildtests_cxx
@@ -2403,10 +2405,11 @@ endif
 LIBGRPC_SRC = \
     src/core/census/grpc_context.c \
     src/core/census/grpc_filter.c \
+    src/core/census/grpc_plugin.c \
     src/core/channel/channel_args.c \
     src/core/channel/channel_stack.c \
+    src/core/channel/channel_stack_builder.c \
     src/core/channel/client_channel.c \
-    src/core/channel/client_uchannel.c \
     src/core/channel/compress_filter.c \
     src/core/channel/connected_channel.c \
     src/core/channel/http_client_filter.c \
@@ -2434,9 +2437,9 @@ LIBGRPC_SRC = \
     src/core/compression/compression_algorithm.c \
     src/core/compression/message_compress.c \
     src/core/debug/trace.c \
-    src/core/httpcli/format_request.c \
-    src/core/httpcli/httpcli.c \
-    src/core/httpcli/parser.c \
+    src/core/http/format_request.c \
+    src/core/http/httpcli.c \
+    src/core/http/parser.c \
     src/core/iomgr/closure.c \
     src/core/iomgr/endpoint.c \
     src/core/iomgr/endpoint_pair_posix.c \
@@ -2471,6 +2474,8 @@ LIBGRPC_SRC = \
     src/core/iomgr/timer.c \
     src/core/iomgr/timer_heap.c \
     src/core/iomgr/udp_server.c \
+    src/core/iomgr/unix_sockets_posix.c \
+    src/core/iomgr/unix_sockets_posix_noop.c \
     src/core/iomgr/wakeup_fd_eventfd.c \
     src/core/iomgr/wakeup_fd_nospecial.c \
     src/core/iomgr/wakeup_fd_pipe.c \
@@ -2492,7 +2497,9 @@ LIBGRPC_SRC = \
     src/core/surface/channel.c \
     src/core/surface/channel_connectivity.c \
     src/core/surface/channel_create.c \
+    src/core/surface/channel_init.c \
     src/core/surface/channel_ping.c \
+    src/core/surface/channel_stack_type.c \
     src/core/surface/completion_queue.c \
     src/core/surface/event_string.c \
     src/core/surface/init.c \
@@ -2500,7 +2507,6 @@ LIBGRPC_SRC = \
     src/core/surface/metadata_array.c \
     src/core/surface/server.c \
     src/core/surface/server_chttp2.c \
-    src/core/surface/server_create.c \
     src/core/surface/validate_metadata.c \
     src/core/surface/version.c \
     src/core/transport/byte_stream.c \
@@ -2531,7 +2537,7 @@ LIBGRPC_SRC = \
     src/core/transport/static_metadata.c \
     src/core/transport/transport.c \
     src/core/transport/transport_op_string.c \
-    src/core/httpcli/httpcli_security_connector.c \
+    src/core/http/httpcli_security_connector.c \
     src/core/security/b64.c \
     src/core/security/client_auth_filter.c \
     src/core/security/credentials.c \
@@ -2684,6 +2690,7 @@ LIBGRPC_TEST_UTIL_SRC = \
     test/core/util/grpc_profiler.c \
     test/core/util/parse_hexstring.c \
     test/core/util/port_posix.c \
+    test/core/util/port_server_client.c \
     test/core/util/port_windows.c \
     test/core/util/slice_splitter.c \
 
@@ -2730,6 +2737,7 @@ LIBGRPC_TEST_UTIL_UNSECURE_SRC = \
     test/core/util/grpc_profiler.c \
     test/core/util/parse_hexstring.c \
     test/core/util/port_posix.c \
+    test/core/util/port_server_client.c \
     test/core/util/port_windows.c \
     test/core/util/slice_splitter.c \
 
@@ -2759,10 +2767,11 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/surface/init_unsecure.c \
     src/core/census/grpc_context.c \
     src/core/census/grpc_filter.c \
+    src/core/census/grpc_plugin.c \
     src/core/channel/channel_args.c \
     src/core/channel/channel_stack.c \
+    src/core/channel/channel_stack_builder.c \
     src/core/channel/client_channel.c \
-    src/core/channel/client_uchannel.c \
     src/core/channel/compress_filter.c \
     src/core/channel/connected_channel.c \
     src/core/channel/http_client_filter.c \
@@ -2790,9 +2799,9 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/compression/compression_algorithm.c \
     src/core/compression/message_compress.c \
     src/core/debug/trace.c \
-    src/core/httpcli/format_request.c \
-    src/core/httpcli/httpcli.c \
-    src/core/httpcli/parser.c \
+    src/core/http/format_request.c \
+    src/core/http/httpcli.c \
+    src/core/http/parser.c \
     src/core/iomgr/closure.c \
     src/core/iomgr/endpoint.c \
     src/core/iomgr/endpoint_pair_posix.c \
@@ -2827,6 +2836,8 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/iomgr/timer.c \
     src/core/iomgr/timer_heap.c \
     src/core/iomgr/udp_server.c \
+    src/core/iomgr/unix_sockets_posix.c \
+    src/core/iomgr/unix_sockets_posix_noop.c \
     src/core/iomgr/wakeup_fd_eventfd.c \
     src/core/iomgr/wakeup_fd_nospecial.c \
     src/core/iomgr/wakeup_fd_pipe.c \
@@ -2848,7 +2859,9 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/surface/channel.c \
     src/core/surface/channel_connectivity.c \
     src/core/surface/channel_create.c \
+    src/core/surface/channel_init.c \
     src/core/surface/channel_ping.c \
+    src/core/surface/channel_stack_type.c \
     src/core/surface/completion_queue.c \
     src/core/surface/event_string.c \
     src/core/surface/init.c \
@@ -2856,7 +2869,6 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/surface/metadata_array.c \
     src/core/surface/server.c \
     src/core/surface/server_chttp2.c \
-    src/core/surface/server_create.c \
     src/core/surface/validate_metadata.c \
     src/core/surface/version.c \
     src/core/transport/byte_stream.c \
@@ -4377,6 +4389,43 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
+LIBBORINGSSL_ASN1_TEST_LIB_SRC = \
+    third_party/boringssl/crypto/asn1/asn1_test.cc \
+
+
+LIBBORINGSSL_ASN1_TEST_LIB_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBBORINGSSL_ASN1_TEST_LIB_SRC))))
+
+$(LIBBORINGSSL_ASN1_TEST_LIB_OBJS): CPPFLAGS += -Ithird_party/boringssl/include -fvisibility=hidden -DOPENSSL_NO_ASM -D_GNU_SOURCE -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX
+$(LIBBORINGSSL_ASN1_TEST_LIB_OBJS): CFLAGS += -Wno-sign-conversion -Wno-conversion -Wno-unused-value -Wno-unknown-pragmas -Wno-implicit-function-declaration -Wno-unused-variable -Wno-sign-compare
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build a C++ library if you don't have protobuf - a bit overreached, but still okay.
+
+$(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a: protobuf_dep_error
+
+
+else
+
+$(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a: $(ZLIB_DEP)  $(PROTOBUF_DEP) $(LIBBORINGSSL_ASN1_TEST_LIB_OBJS) 
+	$(E) "[AR]      Creating $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) rm -f $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a
+	$(Q) $(AR) $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a $(LIBBORINGSSL_ASN1_TEST_LIB_OBJS) 
+ifeq ($(SYSTEM),Darwin)
+	$(Q) ranlib -no_warning_for_no_symbols $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a
+endif
+
+
+
+
+endif
+
+ifneq ($(NO_DEPS),true)
+-include $(LIBBORINGSSL_ASN1_TEST_LIB_OBJS:.o=.dep)
+endif
+
+
 LIBBORINGSSL_BASE64_TEST_LIB_SRC = \
     third_party/boringssl/crypto/base64/base64_test.cc \
 
@@ -7712,72 +7761,72 @@ endif
 endif
 
 
-HTTPCLI_FORMAT_REQUEST_TEST_SRC = \
-    test/core/httpcli/format_request_test.c \
+HTTP_PARSER_TEST_SRC = \
+    test/core/http/parser_test.c \
 
-HTTPCLI_FORMAT_REQUEST_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTPCLI_FORMAT_REQUEST_TEST_SRC))))
+HTTP_PARSER_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTP_PARSER_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL.
 
-$(BINDIR)/$(CONFIG)/httpcli_format_request_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/http_parser_test: openssl_dep_error
 
 else
 
 
 
-$(BINDIR)/$(CONFIG)/httpcli_format_request_test: $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/http_parser_test: $(HTTP_PARSER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/httpcli_format_request_test
+	$(Q) $(LD) $(LDFLAGS) $(HTTP_PARSER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/http_parser_test
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/core/httpcli/format_request_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(OBJDIR)/$(CONFIG)/test/core/http/parser_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 
-deps_httpcli_format_request_test: $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS:.o=.dep)
+deps_http_parser_test: $(HTTP_PARSER_TEST_OBJS:.o=.dep)
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS:.o=.dep)
+-include $(HTTP_PARSER_TEST_OBJS:.o=.dep)
 endif
 endif
 
 
-HTTPCLI_PARSER_TEST_SRC = \
-    test/core/httpcli/parser_test.c \
+HTTPCLI_FORMAT_REQUEST_TEST_SRC = \
+    test/core/http/format_request_test.c \
 
-HTTPCLI_PARSER_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTPCLI_PARSER_TEST_SRC))))
+HTTPCLI_FORMAT_REQUEST_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTPCLI_FORMAT_REQUEST_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
 
 # You can't build secure targets if you don't have OpenSSL.
 
-$(BINDIR)/$(CONFIG)/httpcli_parser_test: openssl_dep_error
+$(BINDIR)/$(CONFIG)/httpcli_format_request_test: openssl_dep_error
 
 else
 
 
 
-$(BINDIR)/$(CONFIG)/httpcli_parser_test: $(HTTPCLI_PARSER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(BINDIR)/$(CONFIG)/httpcli_format_request_test: $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 	$(E) "[LD]      Linking $@"
 	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(HTTPCLI_PARSER_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/httpcli_parser_test
+	$(Q) $(LD) $(LDFLAGS) $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/httpcli_format_request_test
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/core/httpcli/parser_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(OBJDIR)/$(CONFIG)/test/core/http/format_request_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 
-deps_httpcli_parser_test: $(HTTPCLI_PARSER_TEST_OBJS:.o=.dep)
+deps_httpcli_format_request_test: $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS:.o=.dep)
 
 ifneq ($(NO_SECURE),true)
 ifneq ($(NO_DEPS),true)
--include $(HTTPCLI_PARSER_TEST_OBJS:.o=.dep)
+-include $(HTTPCLI_FORMAT_REQUEST_TEST_OBJS:.o=.dep)
 endif
 endif
 
 
 HTTPCLI_TEST_SRC = \
-    test/core/httpcli/httpcli_test.c \
+    test/core/http/httpcli_test.c \
 
 HTTPCLI_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTPCLI_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
@@ -7797,7 +7846,7 @@ $(BINDIR)/$(CONFIG)/httpcli_test: $(HTTPCLI_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgr
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/core/httpcli/httpcli_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(OBJDIR)/$(CONFIG)/test/core/http/httpcli_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 
 deps_httpcli_test: $(HTTPCLI_TEST_OBJS:.o=.dep)
 
@@ -7809,7 +7858,7 @@ endif
 
 
 HTTPSCLI_TEST_SRC = \
-    test/core/httpcli/httpscli_test.c \
+    test/core/http/httpscli_test.c \
 
 HTTPSCLI_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(HTTPSCLI_TEST_SRC))))
 ifeq ($(NO_SECURE),true)
@@ -7829,7 +7878,7 @@ $(BINDIR)/$(CONFIG)/httpscli_test: $(HTTPSCLI_TEST_OBJS) $(LIBDIR)/$(CONFIG)/lib
 
 endif
 
-$(OBJDIR)/$(CONFIG)/test/core/httpcli/httpscli_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+$(OBJDIR)/$(CONFIG)/test/core/http/httpscli_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
 
 deps_httpscli_test: $(HTTPSCLI_TEST_OBJS:.o=.dep)
 
@@ -11230,6 +11279,33 @@ endif
 
 
 
+# boringssl needs an override to ensure that it does not include
+# system openssl headers regardless of other configuration
+# we do so here with a target specific variable assignment
+$(BORINGSSL_ASN1_TEST_OBJS): CFLAGS := -Ithird_party/boringssl/include $(CFLAGS) -Wno-sign-conversion -Wno-conversion -Wno-unused-value
+$(BORINGSSL_ASN1_TEST_OBJS): CXXFLAGS := -Ithird_party/boringssl/include $(CXXFLAGS)
+$(BORINGSSL_ASN1_TEST_OBJS): CPPFLAGS += -DOPENSSL_NO_ASM -D_GNU_SOURCE
+
+
+ifeq ($(NO_PROTOBUF),true)
+
+# You can't build the protoc plugins or protobuf-enabled targets if you don't have protobuf 3.0.0+.
+
+$(BINDIR)/$(CONFIG)/boringssl_asn1_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/boringssl_asn1_test:  $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a $(LIBDIR)/$(CONFIG)/libboringssl.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS)  $(LIBDIR)/$(CONFIG)/libboringssl_asn1_test_lib.a $(LIBDIR)/$(CONFIG)/libboringssl_test_util.a $(LIBDIR)/$(CONFIG)/libboringssl.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/boringssl_asn1_test
+
+endif
+
+
+
+
+
 # boringssl needs an override to ensure that it does not include
 # system openssl headers regardless of other configuration
 # we do so here with a target specific variable assignment
@@ -12686,6 +12762,38 @@ endif
 endif
 
 
+H2_FULL+TRACE_TEST_SRC = \
+    test/core/end2end/fixtures/h2_full+trace.c \
+
+H2_FULL+TRACE_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FULL+TRACE_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/h2_full+trace_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/h2_full+trace_test: $(H2_FULL+TRACE_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(H2_FULL+TRACE_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/h2_full+trace_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_full+trace.o:  $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_full+trace_test: $(H2_FULL+TRACE_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(H2_FULL+TRACE_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 H2_OAUTH2_TEST_SRC = \
     test/core/end2end/fixtures/h2_oauth2.c \
 
@@ -12942,38 +13050,6 @@ endif
 endif
 
 
-H2_UCHANNEL_TEST_SRC = \
-    test/core/end2end/fixtures/h2_uchannel.c \
-
-H2_UCHANNEL_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_UCHANNEL_TEST_SRC))))
-ifeq ($(NO_SECURE),true)
-
-# You can't build secure targets if you don't have OpenSSL.
-
-$(BINDIR)/$(CONFIG)/h2_uchannel_test: openssl_dep_error
-
-else
-
-
-
-$(BINDIR)/$(CONFIG)/h2_uchannel_test: $(H2_UCHANNEL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(H2_UCHANNEL_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/h2_uchannel_test
-
-endif
-
-$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_uchannel.o:  $(LIBDIR)/$(CONFIG)/libend2end_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_h2_uchannel_test: $(H2_UCHANNEL_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_SECURE),true)
-ifneq ($(NO_DEPS),true)
--include $(H2_UCHANNEL_TEST_OBJS:.o=.dep)
-endif
-endif
-
-
 H2_UDS_TEST_SRC = \
     test/core/end2end/fixtures/h2_uds.c \
 
@@ -13158,6 +13234,26 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
+H2_FULL+TRACE_NOSEC_TEST_SRC = \
+    test/core/end2end/fixtures/h2_full+trace.c \
+
+H2_FULL+TRACE_NOSEC_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_FULL+TRACE_NOSEC_TEST_SRC))))
+
+
+$(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test: $(H2_FULL+TRACE_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(H2_FULL+TRACE_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/h2_full+trace_nosec_test
+
+$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_full+trace.o:  $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_h2_full+trace_nosec_test: $(H2_FULL+TRACE_NOSEC_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_DEPS),true)
+-include $(H2_FULL+TRACE_NOSEC_TEST_OBJS:.o=.dep)
+endif
+
+
 H2_PROXY_NOSEC_TEST_SRC = \
     test/core/end2end/fixtures/h2_proxy.c \
 
@@ -13238,26 +13334,6 @@ ifneq ($(NO_DEPS),true)
 endif
 
 
-H2_UCHANNEL_NOSEC_TEST_SRC = \
-    test/core/end2end/fixtures/h2_uchannel.c \
-
-H2_UCHANNEL_NOSEC_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(H2_UCHANNEL_NOSEC_TEST_SRC))))
-
-
-$(BINDIR)/$(CONFIG)/h2_uchannel_nosec_test: $(H2_UCHANNEL_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-	$(E) "[LD]      Linking $@"
-	$(Q) mkdir -p `dirname $@`
-	$(Q) $(LD) $(LDFLAGS) $(H2_UCHANNEL_NOSEC_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) -o $(BINDIR)/$(CONFIG)/h2_uchannel_nosec_test
-
-$(OBJDIR)/$(CONFIG)/test/core/end2end/fixtures/h2_uchannel.o:  $(LIBDIR)/$(CONFIG)/libend2end_nosec_tests.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util_unsecure.a $(LIBDIR)/$(CONFIG)/libgrpc_unsecure.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
-
-deps_h2_uchannel_nosec_test: $(H2_UCHANNEL_NOSEC_TEST_OBJS:.o=.dep)
-
-ifneq ($(NO_DEPS),true)
--include $(H2_UCHANNEL_NOSEC_TEST_OBJS:.o=.dep)
-endif
-
-
 H2_UDS_NOSEC_TEST_SRC = \
     test/core/end2end/fixtures/h2_uds.c \
 
@@ -13306,7 +13382,7 @@ ifneq ($(OPENSSL_DEP),)
 # This is to ensure the embedded OpenSSL is built beforehand, properly
 # installing headers to their final destination on the drive. We need this
 # otherwise parallel compilation will fail if a source is compiled first.
-src/core/httpcli/httpcli_security_connector.c: $(OPENSSL_DEP)
+src/core/http/httpcli_security_connector.c: $(OPENSSL_DEP)
 src/core/security/b64.c: $(OPENSSL_DEP)
 src/core/security/client_auth_filter.c: $(OPENSSL_DEP)
 src/core/security/credentials.c: $(OPENSSL_DEP)
diff --git a/binding.gyp b/binding.gyp
index bb974d6ef8a20cd480ec434fa1806978a9da2a48..2ee383a95c7fc11bbbbbf0eb0b6f84af9e3a4a5d 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -560,10 +560,11 @@
       'sources': [
         'src/core/census/grpc_context.c',
         'src/core/census/grpc_filter.c',
+        'src/core/census/grpc_plugin.c',
         'src/core/channel/channel_args.c',
         'src/core/channel/channel_stack.c',
+        'src/core/channel/channel_stack_builder.c',
         'src/core/channel/client_channel.c',
-        'src/core/channel/client_uchannel.c',
         'src/core/channel/compress_filter.c',
         'src/core/channel/connected_channel.c',
         'src/core/channel/http_client_filter.c',
@@ -591,9 +592,9 @@
         'src/core/compression/compression_algorithm.c',
         'src/core/compression/message_compress.c',
         'src/core/debug/trace.c',
-        'src/core/httpcli/format_request.c',
-        'src/core/httpcli/httpcli.c',
-        'src/core/httpcli/parser.c',
+        'src/core/http/format_request.c',
+        'src/core/http/httpcli.c',
+        'src/core/http/parser.c',
         'src/core/iomgr/closure.c',
         'src/core/iomgr/endpoint.c',
         'src/core/iomgr/endpoint_pair_posix.c',
@@ -628,6 +629,8 @@
         'src/core/iomgr/timer.c',
         'src/core/iomgr/timer_heap.c',
         'src/core/iomgr/udp_server.c',
+        'src/core/iomgr/unix_sockets_posix.c',
+        'src/core/iomgr/unix_sockets_posix_noop.c',
         'src/core/iomgr/wakeup_fd_eventfd.c',
         'src/core/iomgr/wakeup_fd_nospecial.c',
         'src/core/iomgr/wakeup_fd_pipe.c',
@@ -649,7 +652,9 @@
         'src/core/surface/channel.c',
         'src/core/surface/channel_connectivity.c',
         'src/core/surface/channel_create.c',
+        'src/core/surface/channel_init.c',
         'src/core/surface/channel_ping.c',
+        'src/core/surface/channel_stack_type.c',
         'src/core/surface/completion_queue.c',
         'src/core/surface/event_string.c',
         'src/core/surface/init.c',
@@ -657,7 +662,6 @@
         'src/core/surface/metadata_array.c',
         'src/core/surface/server.c',
         'src/core/surface/server_chttp2.c',
-        'src/core/surface/server_create.c',
         'src/core/surface/validate_metadata.c',
         'src/core/surface/version.c',
         'src/core/transport/byte_stream.c',
@@ -688,7 +692,7 @@
         'src/core/transport/static_metadata.c',
         'src/core/transport/transport.c',
         'src/core/transport/transport_op_string.c',
-        'src/core/httpcli/httpcli_security_connector.c',
+        'src/core/http/httpcli_security_connector.c',
         'src/core/security/b64.c',
         'src/core/security/client_auth_filter.c',
         'src/core/security/credentials.c',
diff --git a/build.yaml b/build.yaml
index 8a6551196981ad4b1b5345c380332432197547fa..fd820b87fd4108459fa7c891414aa0c15d3d24ec 100644
--- a/build.yaml
+++ b/build.yaml
@@ -248,10 +248,11 @@ filegroups:
   - include/grpc/status.h
   headers:
   - src/core/census/grpc_filter.h
+  - src/core/census/grpc_plugin.h
   - src/core/channel/channel_args.h
   - src/core/channel/channel_stack.h
+  - src/core/channel/channel_stack_builder.h
   - src/core/channel/client_channel.h
-  - src/core/channel/client_uchannel.h
   - src/core/channel/compress_filter.h
   - src/core/channel/connected_channel.h
   - src/core/channel/context.h
@@ -279,9 +280,9 @@ filegroups:
   - src/core/compression/algorithm_metadata.h
   - src/core/compression/message_compress.h
   - src/core/debug/trace.h
-  - src/core/httpcli/format_request.h
-  - src/core/httpcli/httpcli.h
-  - src/core/httpcli/parser.h
+  - src/core/http/format_request.h
+  - src/core/http/httpcli.h
+  - src/core/http/parser.h
   - src/core/iomgr/closure.h
   - src/core/iomgr/endpoint.h
   - src/core/iomgr/endpoint_pair.h
@@ -313,6 +314,7 @@ filegroups:
   - src/core/iomgr/timer.h
   - src/core/iomgr/timer_heap.h
   - src/core/iomgr/udp_server.h
+  - src/core/iomgr/unix_sockets_posix.h
   - src/core/iomgr/wakeup_fd_pipe.h
   - src/core/iomgr/wakeup_fd_posix.h
   - src/core/iomgr/workqueue.h
@@ -329,9 +331,12 @@ filegroups:
   - src/core/surface/call.h
   - src/core/surface/call_test_only.h
   - src/core/surface/channel.h
+  - src/core/surface/channel_init.h
+  - src/core/surface/channel_stack_type.h
   - src/core/surface/completion_queue.h
   - src/core/surface/event_string.h
   - src/core/surface/init.h
+  - src/core/surface/lame_client.h
   - src/core/surface/server.h
   - src/core/surface/surface_trace.h
   - src/core/transport/byte_stream.h
@@ -365,10 +370,11 @@ filegroups:
   src:
   - src/core/census/grpc_context.c
   - src/core/census/grpc_filter.c
+  - src/core/census/grpc_plugin.c
   - src/core/channel/channel_args.c
   - src/core/channel/channel_stack.c
+  - src/core/channel/channel_stack_builder.c
   - src/core/channel/client_channel.c
-  - src/core/channel/client_uchannel.c
   - src/core/channel/compress_filter.c
   - src/core/channel/connected_channel.c
   - src/core/channel/http_client_filter.c
@@ -396,9 +402,9 @@ filegroups:
   - src/core/compression/compression_algorithm.c
   - src/core/compression/message_compress.c
   - src/core/debug/trace.c
-  - src/core/httpcli/format_request.c
-  - src/core/httpcli/httpcli.c
-  - src/core/httpcli/parser.c
+  - src/core/http/format_request.c
+  - src/core/http/httpcli.c
+  - src/core/http/parser.c
   - src/core/iomgr/closure.c
   - src/core/iomgr/endpoint.c
   - src/core/iomgr/endpoint_pair_posix.c
@@ -433,6 +439,8 @@ filegroups:
   - src/core/iomgr/timer.c
   - src/core/iomgr/timer_heap.c
   - src/core/iomgr/udp_server.c
+  - src/core/iomgr/unix_sockets_posix.c
+  - src/core/iomgr/unix_sockets_posix_noop.c
   - src/core/iomgr/wakeup_fd_eventfd.c
   - src/core/iomgr/wakeup_fd_nospecial.c
   - src/core/iomgr/wakeup_fd_pipe.c
@@ -454,7 +462,9 @@ filegroups:
   - src/core/surface/channel.c
   - src/core/surface/channel_connectivity.c
   - src/core/surface/channel_create.c
+  - src/core/surface/channel_init.c
   - src/core/surface/channel_ping.c
+  - src/core/surface/channel_stack_type.c
   - src/core/surface/completion_queue.c
   - src/core/surface/event_string.c
   - src/core/surface/init.c
@@ -462,7 +472,6 @@ filegroups:
   - src/core/surface/metadata_array.c
   - src/core/surface/server.c
   - src/core/surface/server_chttp2.c
-  - src/core/surface/server_create.c
   - src/core/surface/validate_metadata.c
   - src/core/surface/version.c
   - src/core/transport/byte_stream.c
@@ -518,7 +527,7 @@ filegroups:
   - src/core/tsi/transport_security.h
   - src/core/tsi/transport_security_interface.h
   src:
-  - src/core/httpcli/httpcli_security_connector.c
+  - src/core/http/httpcli_security_connector.c
   - src/core/security/b64.c
   - src/core/security/client_auth_filter.c
   - src/core/security/credentials.c
@@ -547,6 +556,7 @@ filegroups:
   - test/core/util/grpc_profiler.h
   - test/core/util/parse_hexstring.h
   - test/core/util/port.h
+  - test/core/util/port_server_client.h
   - test/core/util/slice_splitter.h
   src:
   - test/core/end2end/cq_verifier.c
@@ -555,6 +565,7 @@ filegroups:
   - test/core/util/grpc_profiler.c
   - test/core/util/parse_hexstring.c
   - test/core/util/port_posix.c
+  - test/core/util/port_server_client.c
   - test/core/util/port_windows.c
   - test/core/util/slice_splitter.c
 - name: nanopb
@@ -1552,21 +1563,21 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-- name: httpcli_format_request_test
+- name: http_parser_test
   build: test
   language: c
   src:
-  - test/core/httpcli/format_request_test.c
+  - test/core/http/parser_test.c
   deps:
   - grpc_test_util
   - grpc
   - gpr_test_util
   - gpr
-- name: httpcli_parser_test
+- name: httpcli_format_request_test
   build: test
   language: c
   src:
-  - test/core/httpcli/parser_test.c
+  - test/core/http/format_request_test.c
   deps:
   - grpc_test_util
   - grpc
@@ -1577,7 +1588,7 @@ targets:
   build: test
   language: c
   src:
-  - test/core/httpcli/httpcli_test.c
+  - test/core/http/httpcli_test.c
   deps:
   - grpc_test_util
   - grpc
@@ -1592,7 +1603,7 @@ targets:
   build: test
   language: c
   src:
-  - test/core/httpcli/httpscli_test.c
+  - test/core/http/httpscli_test.c
   deps:
   - grpc_test_util
   - grpc
@@ -1671,6 +1682,7 @@ targets:
   - gpr
 - name: lb_policies_test
   cpu_cost: 0.1
+  flaky: true
   build: test
   language: c
   src:
@@ -1705,6 +1717,7 @@ targets:
   - gpr_test_util
   - gpr
 - name: mlog_test
+  flaky: true
   build: test
   language: c
   src:
@@ -2811,11 +2824,11 @@ configs:
   etsan:
     CC: clang
     CPPFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
-      -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
+      -DGPR_NO_DIRECT_SYSCALLS
     CXX: clang++
     DEFINES: _DEBUG DEBUG GRPC_EXECUTION_CONTEXT_SANITIZER
     LD: clang
-    LDFLAGS: -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
+    LDFLAGS: -fsanitize=thread
     LDXX: clang++
     compile_the_world: true
     test_environ:
@@ -2867,10 +2880,10 @@ configs:
   tsan:
     CC: clang
     CPPFLAGS: -O0 -fsanitize=thread -fno-omit-frame-pointer -Wno-unused-command-line-argument
-      -fPIE -pie -DGPR_NO_DIRECT_SYSCALLS
+      -DGPR_NO_DIRECT_SYSCALLS
     CXX: clang++
     LD: clang
-    LDFLAGS: -fsanitize=thread -fPIE -pie $(if $(JENKINS_BUILD),-Wl$(comma)-Ttext-segment=0x7e0000000000,)
+    LDFLAGS: -fsanitize=thread
     LDXX: clang++
     compile_the_world: true
     test_environ:
@@ -2935,7 +2948,7 @@ node_modules:
   - src/node/ext/server_credentials.cc
   - src/node/ext/timeval.cc
 openssl_fallback:
-  base_uri: http://openssl.org/source/
+  base_uri: https://openssl.org/source/old/1.0.2/
   extraction_dir: openssl-1.0.2f
   tarball: openssl-1.0.2f.tar.gz
 php_config_m4:
diff --git a/config.m4 b/config.m4
index 013303838e047ed9a49f2994757603cabb0f81e2..8a5b2391b903af1eac9cd5eed97c062b93968807 100644
--- a/config.m4
+++ b/config.m4
@@ -82,10 +82,11 @@ if test "$PHP_GRPC" != "no"; then
     src/core/support/wrap_memcpy.c \
     src/core/census/grpc_context.c \
     src/core/census/grpc_filter.c \
+    src/core/census/grpc_plugin.c \
     src/core/channel/channel_args.c \
     src/core/channel/channel_stack.c \
+    src/core/channel/channel_stack_builder.c \
     src/core/channel/client_channel.c \
-    src/core/channel/client_uchannel.c \
     src/core/channel/compress_filter.c \
     src/core/channel/connected_channel.c \
     src/core/channel/http_client_filter.c \
@@ -113,9 +114,9 @@ if test "$PHP_GRPC" != "no"; then
     src/core/compression/compression_algorithm.c \
     src/core/compression/message_compress.c \
     src/core/debug/trace.c \
-    src/core/httpcli/format_request.c \
-    src/core/httpcli/httpcli.c \
-    src/core/httpcli/parser.c \
+    src/core/http/format_request.c \
+    src/core/http/httpcli.c \
+    src/core/http/parser.c \
     src/core/iomgr/closure.c \
     src/core/iomgr/endpoint.c \
     src/core/iomgr/endpoint_pair_posix.c \
@@ -150,6 +151,8 @@ if test "$PHP_GRPC" != "no"; then
     src/core/iomgr/timer.c \
     src/core/iomgr/timer_heap.c \
     src/core/iomgr/udp_server.c \
+    src/core/iomgr/unix_sockets_posix.c \
+    src/core/iomgr/unix_sockets_posix_noop.c \
     src/core/iomgr/wakeup_fd_eventfd.c \
     src/core/iomgr/wakeup_fd_nospecial.c \
     src/core/iomgr/wakeup_fd_pipe.c \
@@ -171,7 +174,9 @@ if test "$PHP_GRPC" != "no"; then
     src/core/surface/channel.c \
     src/core/surface/channel_connectivity.c \
     src/core/surface/channel_create.c \
+    src/core/surface/channel_init.c \
     src/core/surface/channel_ping.c \
+    src/core/surface/channel_stack_type.c \
     src/core/surface/completion_queue.c \
     src/core/surface/event_string.c \
     src/core/surface/init.c \
@@ -179,7 +184,6 @@ if test "$PHP_GRPC" != "no"; then
     src/core/surface/metadata_array.c \
     src/core/surface/server.c \
     src/core/surface/server_chttp2.c \
-    src/core/surface/server_create.c \
     src/core/surface/validate_metadata.c \
     src/core/surface/version.c \
     src/core/transport/byte_stream.c \
@@ -210,7 +214,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/transport/static_metadata.c \
     src/core/transport/transport.c \
     src/core/transport/transport_op_string.c \
-    src/core/httpcli/httpcli_security_connector.c \
+    src/core/http/httpcli_security_connector.c \
     src/core/security/b64.c \
     src/core/security/client_auth_filter.c \
     src/core/security/credentials.c \
@@ -549,7 +553,7 @@ if test "$PHP_GRPC" != "no"; then
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/client_config/resolvers)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/compression)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/debug)
-  PHP_ADD_BUILD_DIR($ext_builddir/src/core/httpcli)
+  PHP_ADD_BUILD_DIR($ext_builddir/src/core/http)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/iomgr)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/json)
   PHP_ADD_BUILD_DIR($ext_builddir/src/core/profiling)
diff --git a/examples/node/package.json b/examples/node/package.json
index 00ba428d966e8fccc069c2911d3a00c081e125c5..d135df2464b1aa1fbcb656668c3332348daddfe8 100644
--- a/examples/node/package.json
+++ b/examples/node/package.json
@@ -2,6 +2,9 @@
   "name": "grpc-examples",
   "version": "0.1.0",
   "dependencies": {
-    "grpc": "0.13.0"
+    "async": "^1.5.2",
+    "grpc": "0.13.0",
+    "lodash": "^4.6.1",
+    "minimist": "^1.2.0"
   }
 }
diff --git a/examples/python/helloworld/greeter_client.py b/examples/python/helloworld/greeter_client.py
index 561b25bcb2e2651965dfa744cc0431bbde8bf891..9c18b41d25ce6eec19de0e5bb5d9896ee0a0d420 100644
--- a/examples/python/helloworld/greeter_client.py
+++ b/examples/python/helloworld/greeter_client.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,6 +29,8 @@
 
 """The Python implementation of the GRPC helloworld.Greeter client."""
 
+from __future__ import print_function
+
 from grpc.beta import implementations
 
 import helloworld_pb2
@@ -40,7 +42,7 @@ def run():
   channel = implementations.insecure_channel('localhost', 50051)
   stub = helloworld_pb2.beta_create_Greeter_stub(channel)
   response = stub.SayHello(helloworld_pb2.HelloRequest(name='you'), _TIMEOUT_SECONDS)
-  print "Greeter client received: " + response.message
+  print("Greeter client received: " + response.message)
 
 
 if __name__ == '__main__':
diff --git a/examples/python/route_guide/route_guide_client.py b/examples/python/route_guide/route_guide_client.py
index b1dfad551dc78fb05d875e741e34458d6ddf4d95..9d6f865a331d88e365ae68c2ea3e7da53e624b05 100644
--- a/examples/python/route_guide/route_guide_client.py
+++ b/examples/python/route_guide/route_guide_client.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,6 +29,8 @@
 
 """The Python implementation of the gRPC route guide client."""
 
+from __future__ import print_function
+
 import random
 import time
 
@@ -49,13 +51,13 @@ def make_route_note(message, latitude, longitude):
 def guide_get_one_feature(stub, point):
   feature = stub.GetFeature(point, _TIMEOUT_SECONDS)
   if not feature.location:
-    print "Server returned incomplete feature"
+    print("Server returned incomplete feature")
     return
 
   if feature.name:
-    print "Feature called %s at %s" % (feature.name, feature.location)
+    print("Feature called %s at %s" % (feature.name, feature.location))
   else:
-    print "Found no feature at %s" % feature.location
+    print("Found no feature at %s" % feature.location)
 
 
 def guide_get_feature(stub):
@@ -69,18 +71,18 @@ def guide_list_features(stub):
           latitude=400000000, longitude = -750000000),
       hi=route_guide_pb2.Point(
           latitude = 420000000, longitude = -730000000))
-  print "Looking for features between 40, -75 and 42, -73"
+  print("Looking for features between 40, -75 and 42, -73")
 
   features = stub.ListFeatures(rect, _TIMEOUT_SECONDS)
 
   for feature in features:
-    print "Feature called %s at %s" % (feature.name, feature.location)
+    print("Feature called %s at %s" % (feature.name, feature.location))
 
 
 def generate_route(feature_list):
   for _ in range(0, 10):
     random_feature = feature_list[random.randint(0, len(feature_list) - 1)]
-    print "Visiting point %s" % random_feature.location
+    print("Visiting point %s" % random_feature.location)
     yield random_feature.location
     time.sleep(random.uniform(0.5, 1.5))
 
@@ -90,10 +92,10 @@ def guide_record_route(stub):
 
   route_iter = generate_route(feature_list)
   route_summary = stub.RecordRoute(route_iter, _TIMEOUT_SECONDS)
-  print "Finished trip with %s points " % route_summary.point_count
-  print "Passed %s features " % route_summary.feature_count
-  print "Travelled %s meters " % route_summary.distance
-  print "It took %s seconds " % route_summary.elapsed_time
+  print("Finished trip with %s points " % route_summary.point_count)
+  print("Passed %s features " % route_summary.feature_count)
+  print("Travelled %s meters " % route_summary.distance)
+  print("It took %s seconds " % route_summary.elapsed_time)
 
 
 def generate_messages():
@@ -105,7 +107,7 @@ def generate_messages():
       make_route_note("Fifth message", 1, 0),
   ]
   for msg in messages:
-    print "Sending %s at %s" % (msg.message, msg.location)
+    print("Sending %s at %s" % (msg.message, msg.location))
     yield msg
     time.sleep(random.uniform(0.5, 1.0))
 
@@ -113,19 +115,19 @@ def generate_messages():
 def guide_route_chat(stub):
   responses = stub.RouteChat(generate_messages(), _TIMEOUT_SECONDS)
   for response in responses:
-    print "Received message %s at %s" % (response.message, response.location)
+    print("Received message %s at %s" % (response.message, response.location))
 
 
 def run():
   channel = implementations.insecure_channel('localhost', 50051)
   stub = route_guide_pb2.beta_create_RouteGuide_stub(channel)
-  print "-------------- GetFeature --------------"
+  print("-------------- GetFeature --------------")
   guide_get_feature(stub)
-  print "-------------- ListFeatures --------------"
+  print("-------------- ListFeatures --------------")
   guide_list_features(stub)
-  print "-------------- RecordRoute --------------"
+  print("-------------- RecordRoute --------------")
   guide_record_route(stub)
-  print "-------------- RouteChat --------------"
+  print("-------------- RouteChat --------------")
   guide_route_chat(stub)
 
 
diff --git a/gRPC.podspec b/gRPC.podspec
index 8a83bd23e2b3700579af64cd8cdfce2a0ee7c7d6..2a3ed1514148bce80758614f6bb66a45a25eb632 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -162,10 +162,11 @@ Pod::Spec.new do |s|
                       'src/core/support/tmpfile_win32.c',
                       'src/core/support/wrap_memcpy.c',
                       'src/core/census/grpc_filter.h',
+                      'src/core/census/grpc_plugin.h',
                       'src/core/channel/channel_args.h',
                       'src/core/channel/channel_stack.h',
+                      'src/core/channel/channel_stack_builder.h',
                       'src/core/channel/client_channel.h',
-                      'src/core/channel/client_uchannel.h',
                       'src/core/channel/compress_filter.h',
                       'src/core/channel/connected_channel.h',
                       'src/core/channel/context.h',
@@ -193,9 +194,9 @@ Pod::Spec.new do |s|
                       'src/core/compression/algorithm_metadata.h',
                       'src/core/compression/message_compress.h',
                       'src/core/debug/trace.h',
-                      'src/core/httpcli/format_request.h',
-                      'src/core/httpcli/httpcli.h',
-                      'src/core/httpcli/parser.h',
+                      'src/core/http/format_request.h',
+                      'src/core/http/httpcli.h',
+                      'src/core/http/parser.h',
                       'src/core/iomgr/closure.h',
                       'src/core/iomgr/endpoint.h',
                       'src/core/iomgr/endpoint_pair.h',
@@ -227,6 +228,7 @@ Pod::Spec.new do |s|
                       'src/core/iomgr/timer.h',
                       'src/core/iomgr/timer_heap.h',
                       'src/core/iomgr/udp_server.h',
+                      'src/core/iomgr/unix_sockets_posix.h',
                       'src/core/iomgr/wakeup_fd_pipe.h',
                       'src/core/iomgr/wakeup_fd_posix.h',
                       'src/core/iomgr/workqueue.h',
@@ -243,9 +245,12 @@ Pod::Spec.new do |s|
                       'src/core/surface/call.h',
                       'src/core/surface/call_test_only.h',
                       'src/core/surface/channel.h',
+                      'src/core/surface/channel_init.h',
+                      'src/core/surface/channel_stack_type.h',
                       'src/core/surface/completion_queue.h',
                       'src/core/surface/event_string.h',
                       'src/core/surface/init.h',
+                      'src/core/surface/lame_client.h',
                       'src/core/surface/server.h',
                       'src/core/surface/surface_trace.h',
                       'src/core/transport/byte_stream.h',
@@ -312,10 +317,11 @@ Pod::Spec.new do |s|
                       'include/grpc/census.h',
                       'src/core/census/grpc_context.c',
                       'src/core/census/grpc_filter.c',
+                      'src/core/census/grpc_plugin.c',
                       'src/core/channel/channel_args.c',
                       'src/core/channel/channel_stack.c',
+                      'src/core/channel/channel_stack_builder.c',
                       'src/core/channel/client_channel.c',
-                      'src/core/channel/client_uchannel.c',
                       'src/core/channel/compress_filter.c',
                       'src/core/channel/connected_channel.c',
                       'src/core/channel/http_client_filter.c',
@@ -343,9 +349,9 @@ Pod::Spec.new do |s|
                       'src/core/compression/compression_algorithm.c',
                       'src/core/compression/message_compress.c',
                       'src/core/debug/trace.c',
-                      'src/core/httpcli/format_request.c',
-                      'src/core/httpcli/httpcli.c',
-                      'src/core/httpcli/parser.c',
+                      'src/core/http/format_request.c',
+                      'src/core/http/httpcli.c',
+                      'src/core/http/parser.c',
                       'src/core/iomgr/closure.c',
                       'src/core/iomgr/endpoint.c',
                       'src/core/iomgr/endpoint_pair_posix.c',
@@ -380,6 +386,8 @@ Pod::Spec.new do |s|
                       'src/core/iomgr/timer.c',
                       'src/core/iomgr/timer_heap.c',
                       'src/core/iomgr/udp_server.c',
+                      'src/core/iomgr/unix_sockets_posix.c',
+                      'src/core/iomgr/unix_sockets_posix_noop.c',
                       'src/core/iomgr/wakeup_fd_eventfd.c',
                       'src/core/iomgr/wakeup_fd_nospecial.c',
                       'src/core/iomgr/wakeup_fd_pipe.c',
@@ -401,7 +409,9 @@ Pod::Spec.new do |s|
                       'src/core/surface/channel.c',
                       'src/core/surface/channel_connectivity.c',
                       'src/core/surface/channel_create.c',
+                      'src/core/surface/channel_init.c',
                       'src/core/surface/channel_ping.c',
+                      'src/core/surface/channel_stack_type.c',
                       'src/core/surface/completion_queue.c',
                       'src/core/surface/event_string.c',
                       'src/core/surface/init.c',
@@ -409,7 +419,6 @@ Pod::Spec.new do |s|
                       'src/core/surface/metadata_array.c',
                       'src/core/surface/server.c',
                       'src/core/surface/server_chttp2.c',
-                      'src/core/surface/server_create.c',
                       'src/core/surface/validate_metadata.c',
                       'src/core/surface/version.c',
                       'src/core/transport/byte_stream.c',
@@ -440,7 +449,7 @@ Pod::Spec.new do |s|
                       'src/core/transport/static_metadata.c',
                       'src/core/transport/transport.c',
                       'src/core/transport/transport_op_string.c',
-                      'src/core/httpcli/httpcli_security_connector.c',
+                      'src/core/http/httpcli_security_connector.c',
                       'src/core/security/b64.c',
                       'src/core/security/client_auth_filter.c',
                       'src/core/security/credentials.c',
@@ -484,10 +493,11 @@ Pod::Spec.new do |s|
                               'src/core/support/time_precise.h',
                               'src/core/support/tmpfile.h',
                               'src/core/census/grpc_filter.h',
+                              'src/core/census/grpc_plugin.h',
                               'src/core/channel/channel_args.h',
                               'src/core/channel/channel_stack.h',
+                              'src/core/channel/channel_stack_builder.h',
                               'src/core/channel/client_channel.h',
-                              'src/core/channel/client_uchannel.h',
                               'src/core/channel/compress_filter.h',
                               'src/core/channel/connected_channel.h',
                               'src/core/channel/context.h',
@@ -515,9 +525,9 @@ Pod::Spec.new do |s|
                               'src/core/compression/algorithm_metadata.h',
                               'src/core/compression/message_compress.h',
                               'src/core/debug/trace.h',
-                              'src/core/httpcli/format_request.h',
-                              'src/core/httpcli/httpcli.h',
-                              'src/core/httpcli/parser.h',
+                              'src/core/http/format_request.h',
+                              'src/core/http/httpcli.h',
+                              'src/core/http/parser.h',
                               'src/core/iomgr/closure.h',
                               'src/core/iomgr/endpoint.h',
                               'src/core/iomgr/endpoint_pair.h',
@@ -549,6 +559,7 @@ Pod::Spec.new do |s|
                               'src/core/iomgr/timer.h',
                               'src/core/iomgr/timer_heap.h',
                               'src/core/iomgr/udp_server.h',
+                              'src/core/iomgr/unix_sockets_posix.h',
                               'src/core/iomgr/wakeup_fd_pipe.h',
                               'src/core/iomgr/wakeup_fd_posix.h',
                               'src/core/iomgr/workqueue.h',
@@ -565,9 +576,12 @@ Pod::Spec.new do |s|
                               'src/core/surface/call.h',
                               'src/core/surface/call_test_only.h',
                               'src/core/surface/channel.h',
+                              'src/core/surface/channel_init.h',
+                              'src/core/surface/channel_stack_type.h',
                               'src/core/surface/completion_queue.h',
                               'src/core/surface/event_string.h',
                               'src/core/surface/init.h',
+                              'src/core/surface/lame_client.h',
                               'src/core/surface/server.h',
                               'src/core/surface/surface_trace.h',
                               'src/core/transport/byte_stream.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 4480c6e5d1bdf12cf42822cfb578e98d0b7efc7b..eeda035ee827b59eda35acf9983edf54fe441ddb 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -158,10 +158,11 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/impl/codegen/status.h )
   s.files += %w( include/grpc/census.h )
   s.files += %w( src/core/census/grpc_filter.h )
+  s.files += %w( src/core/census/grpc_plugin.h )
   s.files += %w( src/core/channel/channel_args.h )
   s.files += %w( src/core/channel/channel_stack.h )
+  s.files += %w( src/core/channel/channel_stack_builder.h )
   s.files += %w( src/core/channel/client_channel.h )
-  s.files += %w( src/core/channel/client_uchannel.h )
   s.files += %w( src/core/channel/compress_filter.h )
   s.files += %w( src/core/channel/connected_channel.h )
   s.files += %w( src/core/channel/context.h )
@@ -189,9 +190,9 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/compression/algorithm_metadata.h )
   s.files += %w( src/core/compression/message_compress.h )
   s.files += %w( src/core/debug/trace.h )
-  s.files += %w( src/core/httpcli/format_request.h )
-  s.files += %w( src/core/httpcli/httpcli.h )
-  s.files += %w( src/core/httpcli/parser.h )
+  s.files += %w( src/core/http/format_request.h )
+  s.files += %w( src/core/http/httpcli.h )
+  s.files += %w( src/core/http/parser.h )
   s.files += %w( src/core/iomgr/closure.h )
   s.files += %w( src/core/iomgr/endpoint.h )
   s.files += %w( src/core/iomgr/endpoint_pair.h )
@@ -223,6 +224,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/iomgr/timer.h )
   s.files += %w( src/core/iomgr/timer_heap.h )
   s.files += %w( src/core/iomgr/udp_server.h )
+  s.files += %w( src/core/iomgr/unix_sockets_posix.h )
   s.files += %w( src/core/iomgr/wakeup_fd_pipe.h )
   s.files += %w( src/core/iomgr/wakeup_fd_posix.h )
   s.files += %w( src/core/iomgr/workqueue.h )
@@ -239,9 +241,12 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/surface/call.h )
   s.files += %w( src/core/surface/call_test_only.h )
   s.files += %w( src/core/surface/channel.h )
+  s.files += %w( src/core/surface/channel_init.h )
+  s.files += %w( src/core/surface/channel_stack_type.h )
   s.files += %w( src/core/surface/completion_queue.h )
   s.files += %w( src/core/surface/event_string.h )
   s.files += %w( src/core/surface/init.h )
+  s.files += %w( src/core/surface/lame_client.h )
   s.files += %w( src/core/surface/server.h )
   s.files += %w( src/core/surface/surface_trace.h )
   s.files += %w( src/core/transport/byte_stream.h )
@@ -295,10 +300,11 @@ Gem::Specification.new do |s|
   s.files += %w( third_party/nanopb/pb_encode.h )
   s.files += %w( src/core/census/grpc_context.c )
   s.files += %w( src/core/census/grpc_filter.c )
+  s.files += %w( src/core/census/grpc_plugin.c )
   s.files += %w( src/core/channel/channel_args.c )
   s.files += %w( src/core/channel/channel_stack.c )
+  s.files += %w( src/core/channel/channel_stack_builder.c )
   s.files += %w( src/core/channel/client_channel.c )
-  s.files += %w( src/core/channel/client_uchannel.c )
   s.files += %w( src/core/channel/compress_filter.c )
   s.files += %w( src/core/channel/connected_channel.c )
   s.files += %w( src/core/channel/http_client_filter.c )
@@ -326,9 +332,9 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/compression/compression_algorithm.c )
   s.files += %w( src/core/compression/message_compress.c )
   s.files += %w( src/core/debug/trace.c )
-  s.files += %w( src/core/httpcli/format_request.c )
-  s.files += %w( src/core/httpcli/httpcli.c )
-  s.files += %w( src/core/httpcli/parser.c )
+  s.files += %w( src/core/http/format_request.c )
+  s.files += %w( src/core/http/httpcli.c )
+  s.files += %w( src/core/http/parser.c )
   s.files += %w( src/core/iomgr/closure.c )
   s.files += %w( src/core/iomgr/endpoint.c )
   s.files += %w( src/core/iomgr/endpoint_pair_posix.c )
@@ -363,6 +369,8 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/iomgr/timer.c )
   s.files += %w( src/core/iomgr/timer_heap.c )
   s.files += %w( src/core/iomgr/udp_server.c )
+  s.files += %w( src/core/iomgr/unix_sockets_posix.c )
+  s.files += %w( src/core/iomgr/unix_sockets_posix_noop.c )
   s.files += %w( src/core/iomgr/wakeup_fd_eventfd.c )
   s.files += %w( src/core/iomgr/wakeup_fd_nospecial.c )
   s.files += %w( src/core/iomgr/wakeup_fd_pipe.c )
@@ -384,7 +392,9 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/surface/channel.c )
   s.files += %w( src/core/surface/channel_connectivity.c )
   s.files += %w( src/core/surface/channel_create.c )
+  s.files += %w( src/core/surface/channel_init.c )
   s.files += %w( src/core/surface/channel_ping.c )
+  s.files += %w( src/core/surface/channel_stack_type.c )
   s.files += %w( src/core/surface/completion_queue.c )
   s.files += %w( src/core/surface/event_string.c )
   s.files += %w( src/core/surface/init.c )
@@ -392,7 +402,6 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/surface/metadata_array.c )
   s.files += %w( src/core/surface/server.c )
   s.files += %w( src/core/surface/server_chttp2.c )
-  s.files += %w( src/core/surface/server_create.c )
   s.files += %w( src/core/surface/validate_metadata.c )
   s.files += %w( src/core/surface/version.c )
   s.files += %w( src/core/transport/byte_stream.c )
@@ -423,7 +432,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/transport/static_metadata.c )
   s.files += %w( src/core/transport/transport.c )
   s.files += %w( src/core/transport/transport_op_string.c )
-  s.files += %w( src/core/httpcli/httpcli_security_connector.c )
+  s.files += %w( src/core/http/httpcli_security_connector.c )
   s.files += %w( src/core/security/b64.c )
   s.files += %w( src/core/security/client_auth_filter.c )
   s.files += %w( src/core/security/credentials.c )
diff --git a/include/grpc++/impl/codegen/completion_queue_tag.h b/include/grpc++/impl/codegen/completion_queue_tag.h
index 8be2ac36d6e85e83211e7d827e7fdbb5446c35d2..e904f73e96258ff54181197c1c1d4dae7443bf96 100644
--- a/include/grpc++/impl/codegen/completion_queue_tag.h
+++ b/include/grpc++/impl/codegen/completion_queue_tag.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_COMPLETION_QUEUE_TAG_H
-#define GRPCXX_COMPLETION_QUEUE_TAG_H
+#ifndef GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_TAG_H
+#define GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_TAG_H
 
 namespace grpc {
 
@@ -49,4 +49,4 @@ class CompletionQueueTag {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_COMPLETION_QUEUE_TAG_H
+#endif  // GRPCXX_IMPL_CODEGEN_COMPLETION_QUEUE_TAG_H
diff --git a/include/grpc++/impl/codegen/impl/async_stream.h b/include/grpc++/impl/codegen/impl/async_stream.h
index 8f9afe82510c18ba697c99197ffb8d452cd2cae2..413eab7570b951c6d10b4f3321fee101d539607f 100644
--- a/include/grpc++/impl/codegen/impl/async_stream.h
+++ b/include/grpc++/impl/codegen/impl/async_stream.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
-#define GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
+#ifndef GRPCXX_IMPL_CODEGEN_IMPL_ASYNC_STREAM_H
+#define GRPCXX_IMPL_CODEGEN_IMPL_ASYNC_STREAM_H
 
 #include <grpc++/impl/codegen/call.h>
 #include <grpc++/impl/codegen/channel_interface.h>
@@ -460,4 +460,4 @@ class ServerAsyncReaderWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
 
 }  // namespace grpc
 
-#endif  // GRPCXX_IMPL_CODEGEN_ASYNC_STREAM_H
+#endif  // GRPCXX_IMPL_CODEGEN_IMPL_ASYNC_STREAM_H
diff --git a/include/grpc++/impl/codegen/impl/status_code_enum.h b/include/grpc++/impl/codegen/impl/status_code_enum.h
index 9a90a18e2a53305eab91737d757a605b89f0ad2f..f8caec0c119371ea9f569094331dced2772693e2 100644
--- a/include/grpc++/impl/codegen/impl/status_code_enum.h
+++ b/include/grpc++/impl/codegen/impl/status_code_enum.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
-#define GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
+#ifndef GRPCXX_IMPL_CODEGEN_IMPL_STATUS_CODE_ENUM_H
+#define GRPCXX_IMPL_CODEGEN_IMPL_STATUS_CODE_ENUM_H
 
 namespace grpc {
 
@@ -149,4 +149,4 @@ enum StatusCode {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_IMPL_CODEGEN_STATUS_CODE_ENUM_H
+#endif  // GRPCXX_IMPL_CODEGEN_IMPL_STATUS_CODE_ENUM_H
diff --git a/include/grpc++/impl/codegen/impl/sync.h b/include/grpc++/impl/codegen/impl/sync.h
index 375af1543b882787a2ad630e0a893c4286f83e89..68fd0c4f2dc01440da30395cdd6ef498466908a9 100644
--- a/include/grpc++/impl/codegen/impl/sync.h
+++ b/include/grpc++/impl/codegen/impl/sync.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_IMPL_CODEGEN_SYNC_H
-#define GRPCXX_IMPL_CODEGEN_SYNC_H
+#ifndef GRPCXX_IMPL_CODEGEN_IMPL_SYNC_H
+#define GRPCXX_IMPL_CODEGEN_IMPL_SYNC_H
 
 #include <grpc++/impl/codegen/config.h>
 
@@ -42,4 +42,4 @@
 #include <grpc++/impl/codegen/sync_cxx11.h>
 #endif
 
-#endif  // GRPCXX_IMPL_CODEGEN_SYNC_H
+#endif  // GRPCXX_IMPL_CODEGEN_IMPL_SYNC_H
diff --git a/include/grpc++/impl/grpc_library.h b/include/grpc++/impl/grpc_library.h
index d26f4a4cab366b1164eaa4cfdd8f8ed5db828ebc..ecb5a4d64d2458d7b0dce404ff23a8160d4c6a80 100644
--- a/include/grpc++/impl/grpc_library.h
+++ b/include/grpc++/impl/grpc_library.h
@@ -58,8 +58,12 @@ static CoreCodegen g_core_codegen;
 class GrpcLibraryInitializer GRPC_FINAL {
  public:
   GrpcLibraryInitializer() {
-    grpc::g_glip = &g_gli;
-    grpc::g_core_codegen_interface = &g_core_codegen;
+    if (grpc::g_glip == nullptr) {
+      grpc::g_glip = &g_gli;
+    }
+    if (grpc::g_core_codegen_interface == nullptr) {
+      grpc::g_core_codegen_interface = &g_core_codegen;
+    }
   }
 
   /// A no-op method to force the linker to reference this class, which will
diff --git a/include/grpc++/impl/proto_utils.h b/include/grpc++/impl/proto_utils.h
index 9124001e207f0f8b9629de3464166a81044e93d0..36acabba799577ace80188ab52ecdab065bf0edd 100644
--- a/include/grpc++/impl/proto_utils.h
+++ b/include/grpc++/impl/proto_utils.h
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
-#define GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
+#ifndef GRPCXX_IMPL_PROTO_UTILS_H
+#define GRPCXX_IMPL_PROTO_UTILS_H
 
 #include <grpc++/impl/codegen/proto_utils.h>
 
-#endif  // GRPC_INTERNAL_CPP_PROTO_PROTO_UTILS_H
+#endif  // GRPCXX_IMPL_PROTO_UTILS_H
diff --git a/include/grpc++/security/auth_context.h b/include/grpc++/security/auth_context.h
index bca8fa7c0ccb3562b3a3f7ba90bf3884761077aa..548f9a236c53e6970b125efef95bfe5ffd17d6e3 100644
--- a/include/grpc++/security/auth_context.h
+++ b/include/grpc++/security/auth_context.h
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPCXX_SUPPORT_AUTH_CONTEXT_H
-#define GRPCXX_SUPPORT_AUTH_CONTEXT_H
+#ifndef GRPCXX_SECURITY_AUTH_CONTEXT_H
+#define GRPCXX_SECURITY_AUTH_CONTEXT_H
 
 #include <grpc++/impl/codegen/security/auth_context.h>
 
-#endif  // GRPCXX_SUPPORT_AUTH_CONTEXT_H
+#endif  // GRPCXX_SECURITY_AUTH_CONTEXT_H
diff --git a/include/grpc++/security/auth_metadata_processor.h b/include/grpc++/security/auth_metadata_processor.h
index 25011f33bafae0206d95f4f93dcdcc1a62d30fd1..b39451f83e350bb30837af33f34ac59ebee0a485 100644
--- a/include/grpc++/security/auth_metadata_processor.h
+++ b/include/grpc++/security/auth_metadata_processor.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_AUTH_METADATA_PROCESSOR_H_
-#define GRPCXX_AUTH_METADATA_PROCESSOR_H_
+#ifndef GRPCXX_SECURITY_AUTH_METADATA_PROCESSOR_H
+#define GRPCXX_SECURITY_AUTH_METADATA_PROCESSOR_H
 
 #include <map>
 
@@ -70,4 +70,4 @@ class AuthMetadataProcessor {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_AUTH_METADATA_PROCESSOR_H_
+#endif  // GRPCXX_SECURITY_AUTH_METADATA_PROCESSOR_H
diff --git a/include/grpc++/security/credentials.h b/include/grpc++/security/credentials.h
index f2e2efd7a6eba7048c50da896ab1f8c55db8ba44..bedfc9c2a227b5e71244b5866e7497bd78f7a2f2 100644
--- a/include/grpc++/security/credentials.h
+++ b/include/grpc++/security/credentials.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_CREDENTIALS_H
-#define GRPCXX_CREDENTIALS_H
+#ifndef GRPCXX_SECURITY_CREDENTIALS_H
+#define GRPCXX_SECURITY_CREDENTIALS_H
 
 #include <map>
 #include <memory>
@@ -229,4 +229,4 @@ std::shared_ptr<CallCredentials> MetadataCredentialsFromPlugin(
 
 }  // namespace grpc
 
-#endif  // GRPCXX_CREDENTIALS_H
+#endif  // GRPCXX_SECURITY_CREDENTIALS_H
diff --git a/include/grpc++/security/server_credentials.h b/include/grpc++/security/server_credentials.h
index e933825ec37977ab5b8c8e14158c525662f493cc..addb11ccb460a04f2ec158b8ea4d8be752f9899b 100644
--- a/include/grpc++/security/server_credentials.h
+++ b/include/grpc++/security/server_credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPCXX_SERVER_CREDENTIALS_H
-#define GRPCXX_SERVER_CREDENTIALS_H
+#ifndef GRPCXX_SECURITY_SERVER_CREDENTIALS_H
+#define GRPCXX_SECURITY_SERVER_CREDENTIALS_H
 
 #include <memory>
 #include <vector>
@@ -89,4 +89,4 @@ std::shared_ptr<ServerCredentials> InsecureServerCredentials();
 
 }  // namespace grpc
 
-#endif  // GRPCXX_SERVER_CREDENTIALS_H
+#endif  // GRPCXX_SECURITY_SERVER_CREDENTIALS_H
diff --git a/include/grpc++/support/byte_buffer.h b/include/grpc++/support/byte_buffer.h
index 82591a88ef2f4dd3cab659ac5a0cba3d71bcd2a6..27307f8fcdb912a320297976b8e3cc6ede3fc20d 100644
--- a/include/grpc++/support/byte_buffer.h
+++ b/include/grpc++/support/byte_buffer.h
@@ -99,8 +99,8 @@ class SerializationTraits<ByteBuffer, void> {
   }
   static Status Serialize(const ByteBuffer& source, grpc_byte_buffer** buffer,
                           bool* own_buffer) {
-    *buffer = source.buffer();
-    *own_buffer = false;
+    *buffer = grpc_byte_buffer_copy(source.buffer());
+    *own_buffer = true;
     return Status::OK;
   }
 };
diff --git a/include/grpc/census.h b/include/grpc/census.h
index 442a754f0a45f32e09fb7ba25873077c9139b454..4ccf4af5fe54324d8a641efe58baa7bd6a961752 100644
--- a/include/grpc/census.h
+++ b/include/grpc/census.h
@@ -35,8 +35,8 @@
  * they can (ultimately) be used in many different RPC systems (with differing
  * implementations). */
 
-#ifndef CENSUS_CENSUS_H
-#define CENSUS_CENSUS_H
+#ifndef GRPC_CENSUS_H
+#define GRPC_CENSUS_H
 
 #include <grpc/grpc.h>
 
@@ -537,4 +537,4 @@ CENSUSAPI void census_view_reset(census_view *view);
 }
 #endif
 
-#endif /* CENSUS_CENSUS_H */
+#endif /* GRPC_CENSUS_H */
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index acc168a6eefcd0695e29657fd5b24c8c492ecb46..70ba39326174007e92f9ba640f320daa25edaef0 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -55,11 +55,13 @@ GRPCAPI int grpc_compression_algorithm_parse(
 GRPCAPI int grpc_compression_algorithm_name(
     grpc_compression_algorithm algorithm, char **name);
 
-/** Returns the compression algorithm corresponding to \a level.
+/** Returns the compression algorithm corresponding to \a level for the
+ * compression algorithms encoded in the \a accepted_encodings bitset.
  *
  * It abort()s for unknown levels . */
 GRPCAPI grpc_compression_algorithm
-grpc_compression_algorithm_for_level(grpc_compression_level level);
+grpc_compression_algorithm_for_level(grpc_compression_level level,
+                                     uint32_t accepted_encodings);
 
 GRPCAPI void grpc_compression_options_init(grpc_compression_options *opts);
 
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index fd55cb458211a61d398127b98b737fdd09fed04c..ed484118175a4eaab9ad1e1990cefb507bf9d04b 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -133,6 +133,7 @@
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_HAVE_MSG_NOSIGNAL 1
+#define GPR_HAVE_UNIX_SOCKET 1
 #elif defined(__linux__)
 #define GPR_POSIX_CRASH_HANDLER 1
 #define GPR_PLATFORM_STRING "linux"
@@ -154,6 +155,7 @@
 #define GPR_POSIX_WAKEUP_FD 1
 #define GPR_POSIX_SOCKET 1
 #define GPR_POSIX_SOCKETADDR 1
+#define GPR_HAVE_UNIX_SOCKET 1
 #ifdef __GLIBC_PREREQ
 #if __GLIBC_PREREQ(2, 9)
 #define GPR_LINUX_EVENTFD 1
@@ -214,6 +216,7 @@
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_HAVE_SO_NOSIGPIPE 1
+#define GPR_HAVE_UNIX_SOCKET 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
@@ -242,6 +245,7 @@
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_HAVE_SO_NOSIGPIPE 1
+#define GPR_HAVE_UNIX_SOCKET 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
diff --git a/include/grpc/impl/codegen/propagation_bits.h b/include/grpc/impl/codegen/propagation_bits.h
index cdd699710c2378bd205975f2abfd71c04f57250d..4b6455876483d5b11b0f54a115afe7ae15ad1504 100644
--- a/include/grpc/impl/codegen/propagation_bits.h
+++ b/include/grpc/impl/codegen/propagation_bits.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_IMPL_CODEGEN_H
-#define GRPC_IMPL_CODEGEN_H
+#ifndef GRPC_IMPL_CODEGEN_PROPAGATION_BITS_H
+#define GRPC_IMPL_CODEGEN_PROPAGATION_BITS_H
 
 #include <grpc/impl/codegen/port_platform.h>
 
@@ -64,4 +64,4 @@ extern "C" {
 }
 #endif
 
-#endif /* GRPC_IMPL_CODEGEN_H */
+#endif /* GRPC_IMPL_CODEGEN_PROPAGATION_BITS_H */
diff --git a/include/grpc/support/atm_gcc_atomic.h b/include/grpc/support/atm_gcc_atomic.h
index 7e1f7fd55a575b991d7945aeb532acdc23a6f43c..2fc8f609a5af64d0e1c12a8f1a28c07d3422a2d5 100644
--- a/include/grpc/support/atm_gcc_atomic.h
+++ b/include/grpc/support/atm_gcc_atomic.h
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
-#define GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H
+#ifndef GRPC_SUPPORT_ATM_GCC_ATOMIC_H
+#define GRPC_SUPPORT_ATM_GCC_ATOMIC_H
 
 #include <grpc/impl/codegen/atm_gcc_atomic.h>
 
-#endif /* GRPC_IMPL_CODEGEN_ATM_GCC_ATOMIC_H */
+#endif /* GRPC_SUPPORT_ATM_GCC_ATOMIC_H */
diff --git a/include/grpc/support/subprocess.h b/include/grpc/support/subprocess.h
index 6a4946014bed5bee01cccf76af4a5c69fba8257f..e013b706ec024b67415861500d99d711efae9ff4 100644
--- a/include/grpc/support/subprocess.h
+++ b/include/grpc/support/subprocess.h
@@ -56,4 +56,4 @@ GPRAPI void gpr_subprocess_interrupt(gpr_subprocess *p);
 }  // extern "C"
 #endif
 
-#endif
+#endif /* GRPC_SUPPORT_SUBPROCESS_H */
diff --git a/include/grpc/support/tls.h b/include/grpc/support/tls.h
index 43addc7f14556c8cb2832591b8eed4e9f5a77ca6..0ff19bbaddd14ea891a4ecf8786cb7a6f8a3be5f 100644
--- a/include/grpc/support/tls.h
+++ b/include/grpc/support/tls.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -74,4 +74,4 @@
 #include <grpc/support/tls_pthread.h>
 #endif
 
-#endif
+#endif /* GRPC_SUPPORT_TLS_H */
diff --git a/include/grpc/support/tls_gcc.h b/include/grpc/support/tls_gcc.h
index 5aebe6ded977a29076774edad07f5c96c3a1bf0f..21269e4b141b35f4372e3f053ff8cbe528274580 100644
--- a/include/grpc/support/tls_gcc.h
+++ b/include/grpc/support/tls_gcc.h
@@ -97,4 +97,4 @@ struct gpr_gcc_thread_local {
 
 #endif /* NDEBUG */
 
-#endif
+#endif /* GRPC_SUPPORT_TLS_GCC_H */
diff --git a/include/grpc/support/tls_msvc.h b/include/grpc/support/tls_msvc.h
index 987a514f0371c6661516f425b5a74350f833cb84..751ec35f73b0c3742db55b428d5b34b183d07334 100644
--- a/include/grpc/support/tls_msvc.h
+++ b/include/grpc/support/tls_msvc.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_SUPPORT_TLS_GCC_H
-#define GRPC_SUPPORT_TLS_GCC_H
+#ifndef GRPC_SUPPORT_TLS_MSVC_H
+#define GRPC_SUPPORT_TLS_MSVC_H
 
 /* Thread local storage based on ms visual c compiler primitives.
    #include tls.h to use this - and see that file for documentation */
@@ -53,4 +53,4 @@ struct gpr_msvc_thread_local {
 #define gpr_tls_set(tls, new_value) (((tls)->value) = (new_value))
 #define gpr_tls_get(tls) ((tls)->value)
 
-#endif
+#endif /* GRPC_SUPPORT_TLS_MSVC_H */
diff --git a/include/grpc/support/tls_pthread.h b/include/grpc/support/tls_pthread.h
index 699ee6b1d382c3c481b8f4e8d954546a9f52d27a..93ba7822c3a2655cf0c39523bc9b65216c84f7a1 100644
--- a/include/grpc/support/tls_pthread.h
+++ b/include/grpc/support/tls_pthread.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,4 +57,4 @@ intptr_t gpr_tls_set(struct gpr_pthread_thread_local *tls, intptr_t value);
 }
 #endif
 
-#endif
+#endif /* GRPC_SUPPORT_TLS_PTHREAD_H */
diff --git a/package.json b/package.json
index cd9668a1b0e2b6c8e295107d384810112e6a8da3..fe085775f80ff1910dc0e5eae373c602b0e1a7d1 100644
--- a/package.json
+++ b/package.json
@@ -100,10 +100,11 @@
     "include/grpc/impl/codegen/status.h",
     "include/grpc/census.h",
     "src/core/census/grpc_filter.h",
+    "src/core/census/grpc_plugin.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
+    "src/core/channel/channel_stack_builder.h",
     "src/core/channel/client_channel.h",
-    "src/core/channel/client_uchannel.h",
     "src/core/channel/compress_filter.h",
     "src/core/channel/connected_channel.h",
     "src/core/channel/context.h",
@@ -131,9 +132,9 @@
     "src/core/compression/algorithm_metadata.h",
     "src/core/compression/message_compress.h",
     "src/core/debug/trace.h",
-    "src/core/httpcli/format_request.h",
-    "src/core/httpcli/httpcli.h",
-    "src/core/httpcli/parser.h",
+    "src/core/http/format_request.h",
+    "src/core/http/httpcli.h",
+    "src/core/http/parser.h",
     "src/core/iomgr/closure.h",
     "src/core/iomgr/endpoint.h",
     "src/core/iomgr/endpoint_pair.h",
@@ -165,6 +166,7 @@
     "src/core/iomgr/timer.h",
     "src/core/iomgr/timer_heap.h",
     "src/core/iomgr/udp_server.h",
+    "src/core/iomgr/unix_sockets_posix.h",
     "src/core/iomgr/wakeup_fd_pipe.h",
     "src/core/iomgr/wakeup_fd_posix.h",
     "src/core/iomgr/workqueue.h",
@@ -181,9 +183,12 @@
     "src/core/surface/call.h",
     "src/core/surface/call_test_only.h",
     "src/core/surface/channel.h",
+    "src/core/surface/channel_init.h",
+    "src/core/surface/channel_stack_type.h",
     "src/core/surface/completion_queue.h",
     "src/core/surface/event_string.h",
     "src/core/surface/init.h",
+    "src/core/surface/lame_client.h",
     "src/core/surface/server.h",
     "src/core/surface/surface_trace.h",
     "src/core/transport/byte_stream.h",
@@ -237,10 +242,11 @@
     "third_party/nanopb/pb_encode.h",
     "src/core/census/grpc_context.c",
     "src/core/census/grpc_filter.c",
+    "src/core/census/grpc_plugin.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
+    "src/core/channel/channel_stack_builder.c",
     "src/core/channel/client_channel.c",
-    "src/core/channel/client_uchannel.c",
     "src/core/channel/compress_filter.c",
     "src/core/channel/connected_channel.c",
     "src/core/channel/http_client_filter.c",
@@ -268,9 +274,9 @@
     "src/core/compression/compression_algorithm.c",
     "src/core/compression/message_compress.c",
     "src/core/debug/trace.c",
-    "src/core/httpcli/format_request.c",
-    "src/core/httpcli/httpcli.c",
-    "src/core/httpcli/parser.c",
+    "src/core/http/format_request.c",
+    "src/core/http/httpcli.c",
+    "src/core/http/parser.c",
     "src/core/iomgr/closure.c",
     "src/core/iomgr/endpoint.c",
     "src/core/iomgr/endpoint_pair_posix.c",
@@ -305,6 +311,8 @@
     "src/core/iomgr/timer.c",
     "src/core/iomgr/timer_heap.c",
     "src/core/iomgr/udp_server.c",
+    "src/core/iomgr/unix_sockets_posix.c",
+    "src/core/iomgr/unix_sockets_posix_noop.c",
     "src/core/iomgr/wakeup_fd_eventfd.c",
     "src/core/iomgr/wakeup_fd_nospecial.c",
     "src/core/iomgr/wakeup_fd_pipe.c",
@@ -326,7 +334,9 @@
     "src/core/surface/channel.c",
     "src/core/surface/channel_connectivity.c",
     "src/core/surface/channel_create.c",
+    "src/core/surface/channel_init.c",
     "src/core/surface/channel_ping.c",
+    "src/core/surface/channel_stack_type.c",
     "src/core/surface/completion_queue.c",
     "src/core/surface/event_string.c",
     "src/core/surface/init.c",
@@ -334,7 +344,6 @@
     "src/core/surface/metadata_array.c",
     "src/core/surface/server.c",
     "src/core/surface/server_chttp2.c",
-    "src/core/surface/server_create.c",
     "src/core/surface/validate_metadata.c",
     "src/core/surface/version.c",
     "src/core/transport/byte_stream.c",
@@ -365,7 +374,7 @@
     "src/core/transport/static_metadata.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
-    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/http/httpcli_security_connector.c",
     "src/core/security/b64.c",
     "src/core/security/client_auth_filter.c",
     "src/core/security/credentials.c",
diff --git a/package.xml b/package.xml
index 1e0bbc7e39747fb1324dc09a643f02298367bb9b..4a99922fb30e2b03e09948b555097c3cfbddc65e 100644
--- a/package.xml
+++ b/package.xml
@@ -162,10 +162,11 @@
     <file baseinstalldir="/" name="include/grpc/impl/codegen/status.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/census.h" role="src" />
     <file baseinstalldir="/" name="src/core/census/grpc_filter.h" role="src" />
+    <file baseinstalldir="/" name="src/core/census/grpc_plugin.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/channel_args.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/channel_stack.h" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_stack_builder.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/client_channel.h" role="src" />
-    <file baseinstalldir="/" name="src/core/channel/client_uchannel.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/compress_filter.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/connected_channel.h" role="src" />
     <file baseinstalldir="/" name="src/core/channel/context.h" role="src" />
@@ -193,9 +194,9 @@
     <file baseinstalldir="/" name="src/core/compression/algorithm_metadata.h" role="src" />
     <file baseinstalldir="/" name="src/core/compression/message_compress.h" role="src" />
     <file baseinstalldir="/" name="src/core/debug/trace.h" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/format_request.h" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/httpcli.h" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/parser.h" role="src" />
+    <file baseinstalldir="/" name="src/core/http/format_request.h" role="src" />
+    <file baseinstalldir="/" name="src/core/http/httpcli.h" role="src" />
+    <file baseinstalldir="/" name="src/core/http/parser.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/closure.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/endpoint.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/endpoint_pair.h" role="src" />
@@ -227,6 +228,7 @@
     <file baseinstalldir="/" name="src/core/iomgr/timer.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/timer_heap.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/udp_server.h" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/unix_sockets_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_pipe.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/workqueue.h" role="src" />
@@ -243,9 +245,12 @@
     <file baseinstalldir="/" name="src/core/surface/call.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/call_test_only.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/channel.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_init.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_stack_type.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/completion_queue.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/event_string.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/init.h" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/lame_client.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/server.h" role="src" />
     <file baseinstalldir="/" name="src/core/surface/surface_trace.h" role="src" />
     <file baseinstalldir="/" name="src/core/transport/byte_stream.h" role="src" />
@@ -299,10 +304,11 @@
     <file baseinstalldir="/" name="third_party/nanopb/pb_encode.h" role="src" />
     <file baseinstalldir="/" name="src/core/census/grpc_context.c" role="src" />
     <file baseinstalldir="/" name="src/core/census/grpc_filter.c" role="src" />
+    <file baseinstalldir="/" name="src/core/census/grpc_plugin.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/channel_args.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/channel_stack.c" role="src" />
+    <file baseinstalldir="/" name="src/core/channel/channel_stack_builder.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/client_channel.c" role="src" />
-    <file baseinstalldir="/" name="src/core/channel/client_uchannel.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/compress_filter.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/connected_channel.c" role="src" />
     <file baseinstalldir="/" name="src/core/channel/http_client_filter.c" role="src" />
@@ -330,9 +336,9 @@
     <file baseinstalldir="/" name="src/core/compression/compression_algorithm.c" role="src" />
     <file baseinstalldir="/" name="src/core/compression/message_compress.c" role="src" />
     <file baseinstalldir="/" name="src/core/debug/trace.c" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/format_request.c" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/httpcli.c" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/parser.c" role="src" />
+    <file baseinstalldir="/" name="src/core/http/format_request.c" role="src" />
+    <file baseinstalldir="/" name="src/core/http/httpcli.c" role="src" />
+    <file baseinstalldir="/" name="src/core/http/parser.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/closure.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/endpoint.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/endpoint_pair_posix.c" role="src" />
@@ -367,6 +373,8 @@
     <file baseinstalldir="/" name="src/core/iomgr/timer.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/timer_heap.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/udp_server.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/unix_sockets_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/iomgr/unix_sockets_posix_noop.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_eventfd.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_nospecial.c" role="src" />
     <file baseinstalldir="/" name="src/core/iomgr/wakeup_fd_pipe.c" role="src" />
@@ -388,7 +396,9 @@
     <file baseinstalldir="/" name="src/core/surface/channel.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/channel_connectivity.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/channel_create.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_init.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/channel_ping.c" role="src" />
+    <file baseinstalldir="/" name="src/core/surface/channel_stack_type.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/completion_queue.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/event_string.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/init.c" role="src" />
@@ -396,7 +406,6 @@
     <file baseinstalldir="/" name="src/core/surface/metadata_array.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/server.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/server_chttp2.c" role="src" />
-    <file baseinstalldir="/" name="src/core/surface/server_create.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/validate_metadata.c" role="src" />
     <file baseinstalldir="/" name="src/core/surface/version.c" role="src" />
     <file baseinstalldir="/" name="src/core/transport/byte_stream.c" role="src" />
@@ -427,7 +436,7 @@
     <file baseinstalldir="/" name="src/core/transport/static_metadata.c" role="src" />
     <file baseinstalldir="/" name="src/core/transport/transport.c" role="src" />
     <file baseinstalldir="/" name="src/core/transport/transport_op_string.c" role="src" />
-    <file baseinstalldir="/" name="src/core/httpcli/httpcli_security_connector.c" role="src" />
+    <file baseinstalldir="/" name="src/core/http/httpcli_security_connector.c" role="src" />
     <file baseinstalldir="/" name="src/core/security/b64.c" role="src" />
     <file baseinstalldir="/" name="src/core/security/client_auth_filter.c" role="src" />
     <file baseinstalldir="/" name="src/core/security/credentials.c" role="src" />
diff --git a/setup.py b/setup.py
index 45ff2cec89b1f93007be535776e4d14f51c04451..9634de0f831630d597bfea2b73264739831fa1b5 100644
--- a/setup.py
+++ b/setup.py
@@ -42,6 +42,7 @@ from setuptools.command import egg_info
 # Redirect the manifest template from MANIFEST.in to PYTHON-MANIFEST.in.
 egg_info.manifest_maker.template = 'PYTHON-MANIFEST.in'
 
+PY3 = sys.version_info.major == 3
 PYTHON_STEM = './src/python/grpcio'
 CORE_INCLUDE = ('./include', '.',)
 BORINGSSL_INCLUDE = ('./third_party/boringssl/include',)
@@ -103,10 +104,14 @@ if "linux" in sys.platform:
   LDFLAGS += ('-Wl,-wrap,memcpy',)
 if "linux" in sys.platform or "darwin" in sys.platform:
   CFLAGS += ('-fvisibility=hidden',)
-  DEFINE_MACROS += (('PyMODINIT_FUNC', '__attribute__((visibility ("default"))) void'),)
 
+  pymodinit_type = 'PyObject*' if PY3 else 'void'
 
-def cython_extensions(package_names, module_names, extra_sources, include_dirs,
+  pymodinit = '__attribute__((visibility ("default"))) {}'.format(pymodinit_type)
+  DEFINE_MACROS += (('PyMODINIT_FUNC', pymodinit),)
+
+
+def cython_extensions(module_names, extra_sources, include_dirs,
                       libraries, define_macros, build_with_cython=False):
   # Set compiler directives linetrace argument only if we care about tracing;
   # this is due to Cython having different behavior between linetrace being
@@ -139,7 +144,7 @@ def cython_extensions(package_names, module_names, extra_sources, include_dirs,
     return extensions
 
 CYTHON_EXTENSION_MODULES = cython_extensions(
-    list(CYTHON_EXTENSION_PACKAGE_NAMES), list(CYTHON_EXTENSION_MODULE_NAMES),
+    list(CYTHON_EXTENSION_MODULE_NAMES),
     list(CYTHON_HELPER_C_FILES) + list(CORE_C_FILES),
     list(EXTENSION_INCLUDE_DIRECTORIES), list(EXTENSION_LIBRARIES),
     list(DEFINE_MACROS), bool(BUILD_WITH_CYTHON))
diff --git a/src/compiler/cpp_generator.cc b/src/compiler/cpp_generator.cc
index 97295bed4518b9325d8d420f2045c4b93baa14f0..206a6e1fe51c52a03050abbf64327f20f978c5d9 100644
--- a/src/compiler/cpp_generator.cc
+++ b/src/compiler/cpp_generator.cc
@@ -83,6 +83,28 @@ grpc::string FilenameIdentifier(const grpc::string &filename) {
 }
 }  // namespace
 
+template<class T, size_t N>
+T *array_end(T (&array)[N]) { return array + N; }
+
+void PrintIncludes(grpc::protobuf::io::Printer *printer, const std::vector<grpc::string>& headers, const Parameters &params) {
+  std::map<grpc::string, grpc::string> vars;
+
+  vars["l"] = params.use_system_headers ? '<' : '"';
+  vars["r"] = params.use_system_headers ? '>' : '"';
+
+  if (!params.grpc_search_path.empty()) {
+    vars["l"] += params.grpc_search_path;
+    if (params.grpc_search_path.back() != '/') {
+      vars["l"] += '/';
+    }
+  }
+
+  for (auto i = headers.begin(); i != headers.end(); i++) {
+    vars["h"] = *i;
+    printer->Print(vars, "#include $l$$h$$r$\n");
+  }
+}
+
 grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params) {
   grpc::string output;
@@ -111,36 +133,46 @@ grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
 
 grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
                                const Parameters &params) {
-  grpc::string temp =
-      "#include <grpc++/impl/codegen/async_stream.h>\n"
-      "#include <grpc++/impl/codegen/async_unary_call.h>\n"
-      "#include <grpc++/impl/codegen/proto_utils.h>\n"
-      "#include <grpc++/impl/codegen/rpc_method.h>\n"
-      "#include <grpc++/impl/codegen/service_type.h>\n"
-      "#include <grpc++/impl/codegen/status.h>\n"
-      "#include <grpc++/impl/codegen/stub_options.h>\n"
-      "#include <grpc++/impl/codegen/sync_stream.h>\n"
-      "\n"
-      "namespace grpc {\n"
-      "class CompletionQueue;\n"
-      "class RpcService;\n"
-      "class ServerCompletionQueue;\n"
-      "class ServerContext;\n"
-      "}  // namespace grpc\n\n";
+  grpc::string output;
+  {
+    // Scope the output stream so it closes and finalizes output to the string.
+    grpc::protobuf::io::StringOutputStream output_stream(&output);
+    grpc::protobuf::io::Printer printer(&output_stream, '$');
+    std::map<grpc::string, grpc::string> vars;
 
-  if (!file->package().empty()) {
-    std::vector<grpc::string> parts =
-        grpc_generator::tokenize(file->package(), ".");
+    static const char *headers_strs[] = {
+      "grpc++/impl/codegen/async_stream.h",
+      "grpc++/impl/codegen/async_unary_call.h",
+      "grpc++/impl/codegen/proto_utils.h",
+      "grpc++/impl/codegen/rpc_method.h",
+      "grpc++/impl/codegen/service_type.h",
+      "grpc++/impl/codegen/status.h",
+      "grpc++/impl/codegen/stub_options.h",
+      "grpc++/impl/codegen/sync_stream.h"
+    };
+    std::vector<grpc::string> headers(headers_strs, array_end(headers_strs));
+    PrintIncludes(&printer, headers, params);
+    printer.Print(vars, "\n");
+    printer.Print(vars, "namespace grpc {\n");
+    printer.Print(vars, "class CompletionQueue;\n");
+    printer.Print(vars, "class Channel;\n");
+    printer.Print(vars, "class RpcService;\n");
+    printer.Print(vars, "class ServerCompletionQueue;\n");
+    printer.Print(vars, "class ServerContext;\n");
+    printer.Print(vars, "}  // namespace grpc\n\n");
 
-    for (auto part = parts.begin(); part != parts.end(); part++) {
-      temp.append("namespace ");
-      temp.append(*part);
-      temp.append(" {\n");
+    if (!file->package().empty()) {
+      std::vector<grpc::string> parts =
+          grpc_generator::tokenize(file->package(), ".");
+
+      for (auto part = parts.begin(); part != parts.end(); part++) {
+        vars["part"] = *part;
+        printer.Print(vars, "namespace $part$ {\n");
+      }
+      printer.Print(vars, "\n");
     }
-    temp.append("\n");
   }
-
-  return temp;
+  return output;
 }
 
 void PrintHeaderClientMethodInterfaces(
@@ -852,7 +884,7 @@ grpc::string GetSourcePrologue(const grpc::protobuf::FileDescriptor *file,
 }
 
 grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &param) {
+                               const Parameters &params) {
   grpc::string output;
   {
     // Scope the output stream so it closes and finalizes output to the string.
@@ -860,16 +892,18 @@ grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
     grpc::protobuf::io::Printer printer(&output_stream, '$');
     std::map<grpc::string, grpc::string> vars;
 
-    printer.Print(vars, "#include <grpc++/impl/codegen/async_stream.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/codegen/async_unary_call.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/codegen/channel_interface.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/codegen/client_unary_call.h>\n");
-    printer.Print(vars,
-                  "#include <grpc++/impl/codegen/method_handler_impl.h>\n");
-    printer.Print(vars,
-                  "#include <grpc++/impl/codegen/rpc_service_method.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/codegen/service_type.h>\n");
-    printer.Print(vars, "#include <grpc++/impl/codegen/sync_stream.h>\n");
+    static const char *headers_strs[] = {
+      "grpc++/impl/codegen/async_stream.h",
+      "grpc++/impl/codegen/async_unary_call.h",
+      "grpc++/impl/codegen/channel_interface.h",
+      "grpc++/impl/codegen/client_unary_call.h",
+      "grpc++/impl/codegen/method_handler_impl.h",
+      "grpc++/impl/codegen/rpc_service_method.h",
+      "grpc++/impl/codegen/service_type.h",
+      "grpc++/impl/codegen/sync_stream.h"
+    };
+    std::vector<grpc::string> headers(headers_strs, array_end(headers_strs));
+    PrintIncludes(&printer, headers, params);
 
     if (!file->package().empty()) {
       std::vector<grpc::string> parts =
diff --git a/src/compiler/cpp_generator.h b/src/compiler/cpp_generator.h
index 70c2e985f6b87e513de9ea1bf43c8519cdeb0415..4f9de9d11a20ee337b7824c9ff42f92f7522e375 100644
--- a/src/compiler/cpp_generator.h
+++ b/src/compiler/cpp_generator.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,6 +42,10 @@ namespace grpc_cpp_generator {
 struct Parameters {
   // Puts the service into a namespace
   grpc::string services_namespace;
+  // Use system includes (<>) or local includes ("")
+  bool use_system_headers;
+  // Prefix to any grpc include
+  grpc::string grpc_search_path;
 };
 
 // Return the prologue of the generated header file.
diff --git a/src/compiler/cpp_plugin.cc b/src/compiler/cpp_plugin.cc
index 88c704948ecc59aa5f8952b63145c691386ce7be..d8ada4835c54e58dc96f282f80d8747b7f798789 100644
--- a/src/compiler/cpp_plugin.cc
+++ b/src/compiler/cpp_plugin.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,6 +59,7 @@ class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
     }
 
     grpc_cpp_generator::Parameters generator_parameters;
+    generator_parameters.use_system_headers = true;
 
     if (!parameter.empty()) {
       std::vector<grpc::string> parameters_list =
@@ -70,6 +71,17 @@ class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
           grpc_generator::tokenize(*parameter_string, "=");
         if (param[0] == "services_namespace") {
           generator_parameters.services_namespace = param[1];
+        } else if (param[0] == "use_system_headers") {
+          if (param[1] == "true") {
+            generator_parameters.use_system_headers = true;
+          } else if (param[1] == "false") {
+            generator_parameters.use_system_headers = false;
+          } else {
+            *error = grpc::string("Invalid parameter: ") + *parameter_string;
+            return false;
+          }
+        } else if (param[0] == "grpc_search_path") {
+          generator_parameters.grpc_search_path = param[1];
         } else {
           *error = grpc::string("Unknown parameter: ") + *parameter_string;
           return false;
diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc
index 4fd5dfbecb16881442365bd186225a01a8847627..5a2ecce1d4f31017d5d48a8b888291565b21233a 100644
--- a/src/compiler/python_generator.cc
+++ b/src/compiler/python_generator.cc
@@ -190,11 +190,10 @@ bool PrintBetaServicer(const ServiceDescriptor* service,
         "Documentation", doc,
       });
   out->Print("\n");
-  out->Print(dict, "class Beta$Service$Servicer(object):\n");
+  out->Print(dict, "class Beta$Service$Servicer(six.with_metaclass(abc.ABCMeta, object)):\n");
   {
     IndentScope raii_class_indent(out);
     out->Print(dict, "\"\"\"$Documentation$\"\"\"\n");
-    out->Print("__metaclass__ = abc.ABCMeta\n");
     for (int i = 0; i < service->method_count(); ++i) {
       auto meth = service->method(i);
       grpc::string arg_name = meth->client_streaming() ?
@@ -219,11 +218,10 @@ bool PrintBetaStub(const ServiceDescriptor* service,
         "Documentation", doc,
       });
   out->Print("\n");
-  out->Print(dict, "class Beta$Service$Stub(object):\n");
+  out->Print(dict, "class Beta$Service$Stub(six.with_metaclass(abc.ABCMeta, object)):\n");
   {
     IndentScope raii_class_indent(out);
     out->Print(dict, "\"\"\"$Documentation$\"\"\"\n");
-    out->Print("__metaclass__ = abc.ABCMeta\n");
     for (int i = 0; i < service->method_count(); ++i) {
       const MethodDescriptor* meth = service->method(i);
       grpc::string arg_name = meth->client_streaming() ?
@@ -449,6 +447,7 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name,
 bool PrintPreamble(const FileDescriptor* file,
                    const GeneratorConfiguration& config, Printer* out) {
   out->Print("import abc\n");
+  out->Print("import six\n");
   out->Print("from $Package$ import implementations as beta_implementations\n",
              "Package", config.beta_package_root);
   out->Print("from grpc.framework.common import cardinality\n");
diff --git a/src/core/census/aggregation.h b/src/core/census/aggregation.h
index e9bc6ada96085b9c80953773129907e89071bd77..e0ef9630c929d4f7355abefcb830e0a37df04698 100644
--- a/src/core/census/aggregation.h
+++ b/src/core/census/aggregation.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,8 +33,8 @@
 
 #include <stddef.h>
 
-#ifndef GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
-#define GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
+#ifndef GRPC_CORE_CENSUS_AGGREGATION_H
+#define GRPC_CORE_CENSUS_AGGREGATION_H
 
 /** Structure used to describe an aggregation type. */
 struct census_aggregation_ops {
@@ -63,4 +63,4 @@ struct census_aggregation_ops {
   size_t (*print)(const void *aggregation, char *buffer, size_t n);
 };
 
-#endif /* GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H */
+#endif /* GRPC_CORE_CENSUS_AGGREGATION_H */
diff --git a/src/core/census/grpc_filter.h b/src/core/census/grpc_filter.h
index b3de3adc94761a4ed6d565d284c6f570fb0e02c3..4699e4d692735a09677d647107d9aca96221ca56 100644
--- a/src/core/census/grpc_filter.h
+++ b/src/core/census/grpc_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CENSUS_GRPC_FILTER_H
-#define GRPC_INTERNAL_CORE_CENSUS_GRPC_FILTER_H
+#ifndef GRPC_CORE_CENSUS_GRPC_FILTER_H
+#define GRPC_CORE_CENSUS_GRPC_FILTER_H
 
 #include "src/core/channel/channel_stack.h"
 
@@ -41,4 +41,4 @@
 extern const grpc_channel_filter grpc_client_census_filter;
 extern const grpc_channel_filter grpc_server_census_filter;
 
-#endif /* GRPC_INTERNAL_CORE_CENSUS_GRPC_FILTER_H */
+#endif /* GRPC_CORE_CENSUS_GRPC_FILTER_H */
diff --git a/src/core/census/grpc_plugin.c b/src/core/census/grpc_plugin.c
new file mode 100644
index 0000000000000000000000000000000000000000..8d60a5197ed655b3760ddb376ce5820e0e941a39
--- /dev/null
+++ b/src/core/census/grpc_plugin.c
@@ -0,0 +1,70 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/census/grpc_plugin.h"
+
+#include <limits.h>
+
+#include <grpc/census.h>
+
+#include "src/core/census/grpc_filter.h"
+#include "src/core/surface/channel_init.h"
+#include "src/core/channel/channel_stack_builder.h"
+
+static bool maybe_add_census_filter(grpc_channel_stack_builder *builder,
+                                    void *arg_must_be_null) {
+  const grpc_channel_args *args =
+      grpc_channel_stack_builder_get_channel_arguments(builder);
+  if (grpc_channel_args_is_census_enabled(args)) {
+    return grpc_channel_stack_builder_prepend_filter(
+        builder, &grpc_client_census_filter, NULL, NULL);
+  }
+  return true;
+}
+
+void census_grpc_plugin_init(void) {
+  /* Only initialize census if no one else has and some features are
+   * available. */
+  if (census_enabled() == CENSUS_FEATURE_NONE &&
+      census_supported() != CENSUS_FEATURE_NONE) {
+    if (census_initialize(census_supported())) { /* enable all features. */
+      gpr_log(GPR_ERROR, "Could not initialize census.");
+    }
+  }
+  grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX,
+                                   maybe_add_census_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
+                                   maybe_add_census_filter, NULL);
+}
+
+void census_grpc_plugin_destroy(void) { census_shutdown(); }
diff --git a/src/core/surface/server_create.c b/src/core/census/grpc_plugin.h
similarity index 71%
rename from src/core/surface/server_create.c
rename to src/core/census/grpc_plugin.h
index 5e37e80948e4b05032789ff006e8acd2a4fede68..9321c2c30f3bf0002e8344c13caa6f2fdec60808 100644
--- a/src/core/surface/server_create.c
+++ b/src/core/census/grpc_plugin.h
@@ -31,18 +31,10 @@
  *
  */
 
-#include <grpc/grpc.h>
-#include "src/core/census/grpc_filter.h"
-#include "src/core/channel/channel_args.h"
-#include "src/core/channel/compress_filter.h"
-#include "src/core/surface/api_trace.h"
-#include "src/core/surface/completion_queue.h"
-#include "src/core/surface/server.h"
+#ifndef GRPC_CORE_CENSUS_GRPC_PLUGIN_H
+#define GRPC_CORE_CENSUS_GRPC_PLUGIN_H
 
-grpc_server *grpc_server_create(const grpc_channel_args *args, void *reserved) {
-  const grpc_channel_filter *filters[3];
-  size_t num_filters = 0;
-  filters[num_filters++] = &grpc_compress_filter;
-  GRPC_API_TRACE("grpc_server_create(%p, %p)", 2, (args, reserved));
-  return grpc_server_create_from_filters(filters, num_filters, args);
-}
+void census_grpc_plugin_init(void);
+void census_grpc_plugin_destroy(void);
+
+#endif /* GRPC_CORE_CENSUS_GRPC_PLUGIN_H */
diff --git a/src/core/census/mlog.h b/src/core/census/mlog.h
index aaba9e15356223b466b97f32de4af96fd17ec71f..bc6eaeaf2826d59b0519de4298d5aa00aa0a849e 100644
--- a/src/core/census/mlog.h
+++ b/src/core/census/mlog.h
@@ -33,8 +33,8 @@
 
 /* A very fast in-memory log, optimized for multiple writers. */
 
-#ifndef GRPC_INTERNAL_CORE_CENSUS_MLOG_H
-#define GRPC_INTERNAL_CORE_CENSUS_MLOG_H
+#ifndef GRPC_CORE_CENSUS_MLOG_H
+#define GRPC_CORE_CENSUS_MLOG_H
 
 #include <grpc/support/port_platform.h>
 #include <stddef.h>
@@ -92,4 +92,4 @@ size_t census_log_remaining_space(void);
    out-of-space. */
 int64_t census_log_out_of_space_count(void);
 
-#endif /* GRPC_INTERNAL_CORE_CENSUS_LOG_H */
+#endif /* GRPC_CORE_CENSUS_MLOG_H */
diff --git a/src/core/census/rpc_metric_id.h b/src/core/census/rpc_metric_id.h
index f199839511ce128ffd0311fa42c7ffd1ea944dff..f8d8dad0bf3da68b12789717ed1ee59fba81fc8a 100644
--- a/src/core/census/rpc_metric_id.h
+++ b/src/core/census/rpc_metric_id.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef CENSUS_RPC_METRIC_ID_H
-#define CENSUS_RPC_METRIC_ID_H
+#ifndef GRPC_CORE_CENSUS_RPC_METRIC_ID_H
+#define GRPC_CORE_CENSUS_RPC_METRIC_ID_H
 
 /* Metric ID's used for RPC measurements. */
 /* Count of client requests sent. */
@@ -48,4 +48,4 @@
 /* Server side request latency. */
 #define CENSUS_METRIC_RPC_SERVER_LATENCY ((uint32_t)5)
 
-#endif /* CENSUS_RPC_METRIC_ID_H */
+#endif /* GRPC_CORE_CENSUS_RPC_METRIC_ID_H */
diff --git a/src/core/channel/channel_args.h b/src/core/channel/channel_args.h
index b3a7c9f43492455b4086a7b0dcc5a313ece7e558..e19440f76fe93131d83d464feb51c4628dfd0337 100644
--- a/src/core/channel/channel_args.h
+++ b/src/core/channel/channel_args.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H
+#ifndef GRPC_CORE_CHANNEL_CHANNEL_ARGS_H
+#define GRPC_CORE_CHANNEL_CHANNEL_ARGS_H
 
 #include <grpc/compression.h>
 #include <grpc/grpc.h>
@@ -91,4 +91,4 @@ int grpc_channel_args_compression_algorithm_get_states(
 int grpc_channel_args_compare(const grpc_channel_args *a,
                               const grpc_channel_args *b);
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H */
+#endif /* GRPC_CORE_CHANNEL_CHANNEL_ARGS_H */
diff --git a/src/core/channel/channel_stack.h b/src/core/channel/channel_stack.h
index c01050e7179aacd982e079c6d2e5c2910a8c27f9..52362f0b20e12c825fcd2b4f2659ccc7f5931aea 100644
--- a/src/core/channel/channel_stack.h
+++ b/src/core/channel/channel_stack.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_STACK_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_STACK_H
+#ifndef GRPC_CORE_CHANNEL_CHANNEL_STACK_H
+#define GRPC_CORE_CHANNEL_CHANNEL_STACK_H
 
 /* A channel filter defines how operations on a channel are implemented.
    Channel filters are chained together to create full channels, and if those
@@ -257,4 +257,4 @@ extern int grpc_trace_channel;
 #define GRPC_CALL_LOG_OP(sev, elem, op) \
   if (grpc_trace_channel) grpc_call_log_op(sev, elem, op)
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_STACK_H */
+#endif /* GRPC_CORE_CHANNEL_CHANNEL_STACK_H */
diff --git a/src/core/channel/channel_stack_builder.c b/src/core/channel/channel_stack_builder.c
new file mode 100644
index 0000000000000000000000000000000000000000..1b1004e5f9fd35ecce7746e94956cde1f8110575
--- /dev/null
+++ b/src/core/channel/channel_stack_builder.c
@@ -0,0 +1,258 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/channel/channel_stack_builder.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+
+int grpc_trace_channel_stack_builder = 0;
+
+typedef struct filter_node {
+  struct filter_node *next;
+  struct filter_node *prev;
+  const grpc_channel_filter *filter;
+  grpc_post_filter_create_init_func init;
+  void *init_arg;
+} filter_node;
+
+struct grpc_channel_stack_builder {
+  // sentinel nodes for filters that have been added
+  filter_node begin;
+  filter_node end;
+  // various set/get-able parameters
+  const grpc_channel_args *args;
+  grpc_transport *transport;
+  const char *name;
+};
+
+struct grpc_channel_stack_builder_iterator {
+  grpc_channel_stack_builder *builder;
+  filter_node *node;
+};
+
+grpc_channel_stack_builder *grpc_channel_stack_builder_create(void) {
+  grpc_channel_stack_builder *b = gpr_malloc(sizeof(*b));
+  memset(b, 0, sizeof(*b));
+
+  b->begin.filter = NULL;
+  b->end.filter = NULL;
+  b->begin.next = &b->end;
+  b->begin.prev = &b->end;
+  b->end.next = &b->begin;
+  b->end.prev = &b->begin;
+
+  return b;
+}
+
+static grpc_channel_stack_builder_iterator *create_iterator_at_filter_node(
+    grpc_channel_stack_builder *builder, filter_node *node) {
+  grpc_channel_stack_builder_iterator *it = gpr_malloc(sizeof(*it));
+  it->builder = builder;
+  it->node = node;
+  return it;
+}
+
+void grpc_channel_stack_builder_iterator_destroy(
+    grpc_channel_stack_builder_iterator *it) {
+  gpr_free(it);
+}
+
+grpc_channel_stack_builder_iterator *
+grpc_channel_stack_builder_create_iterator_at_first(
+    grpc_channel_stack_builder *builder) {
+  return create_iterator_at_filter_node(builder, &builder->begin);
+}
+
+grpc_channel_stack_builder_iterator *
+grpc_channel_stack_builder_create_iterator_at_last(
+    grpc_channel_stack_builder *builder) {
+  return create_iterator_at_filter_node(builder, &builder->end);
+}
+
+bool grpc_channel_stack_builder_move_next(
+    grpc_channel_stack_builder_iterator *iterator) {
+  if (iterator->node == &iterator->builder->end) return false;
+  iterator->node = iterator->node->next;
+  return true;
+}
+
+bool grpc_channel_stack_builder_move_prev(
+    grpc_channel_stack_builder_iterator *iterator) {
+  if (iterator->node == &iterator->builder->begin) return false;
+  iterator->node = iterator->node->prev;
+  return true;
+}
+
+bool grpc_channel_stack_builder_move_prev(
+    grpc_channel_stack_builder_iterator *iterator);
+
+void grpc_channel_stack_builder_set_name(grpc_channel_stack_builder *builder,
+                                         const char *name) {
+  GPR_ASSERT(builder->name == NULL);
+  builder->name = name;
+}
+
+void grpc_channel_stack_builder_set_channel_arguments(
+    grpc_channel_stack_builder *builder, const grpc_channel_args *args) {
+  GPR_ASSERT(builder->args == NULL);
+  builder->args = args;
+}
+
+void grpc_channel_stack_builder_set_transport(
+    grpc_channel_stack_builder *builder, grpc_transport *transport) {
+  GPR_ASSERT(builder->transport == NULL);
+  builder->transport = transport;
+}
+
+grpc_transport *grpc_channel_stack_builder_get_transport(
+    grpc_channel_stack_builder *builder) {
+  return builder->transport;
+}
+
+const grpc_channel_args *grpc_channel_stack_builder_get_channel_arguments(
+    grpc_channel_stack_builder *builder) {
+  return builder->args;
+}
+
+bool grpc_channel_stack_builder_append_filter(
+    grpc_channel_stack_builder *builder, const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func, void *user_data) {
+  grpc_channel_stack_builder_iterator *it =
+      grpc_channel_stack_builder_create_iterator_at_last(builder);
+  bool ok = grpc_channel_stack_builder_add_filter_before(
+      it, filter, post_init_func, user_data);
+  grpc_channel_stack_builder_iterator_destroy(it);
+  return ok;
+}
+
+bool grpc_channel_stack_builder_prepend_filter(
+    grpc_channel_stack_builder *builder, const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func, void *user_data) {
+  grpc_channel_stack_builder_iterator *it =
+      grpc_channel_stack_builder_create_iterator_at_first(builder);
+  bool ok = grpc_channel_stack_builder_add_filter_after(
+      it, filter, post_init_func, user_data);
+  grpc_channel_stack_builder_iterator_destroy(it);
+  return ok;
+}
+
+static void add_after(filter_node *before, const grpc_channel_filter *filter,
+                      grpc_post_filter_create_init_func post_init_func,
+                      void *user_data) {
+  filter_node *new = gpr_malloc(sizeof(*new));
+  new->next = before->next;
+  new->prev = before;
+  new->next->prev = new->prev->next = new;
+  new->filter = filter;
+  new->init = post_init_func;
+  new->init_arg = user_data;
+}
+
+bool grpc_channel_stack_builder_add_filter_before(
+    grpc_channel_stack_builder_iterator *iterator,
+    const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func, void *user_data) {
+  if (iterator->node == &iterator->builder->begin) return false;
+  add_after(iterator->node->prev, filter, post_init_func, user_data);
+  return true;
+}
+
+bool grpc_channel_stack_builder_add_filter_after(
+    grpc_channel_stack_builder_iterator *iterator,
+    const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func, void *user_data) {
+  if (iterator->node == &iterator->builder->end) return false;
+  add_after(iterator->node, filter, post_init_func, user_data);
+  return true;
+}
+
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder *builder) {
+  filter_node *p = builder->begin.next;
+  while (p != &builder->end) {
+    filter_node *next = p->next;
+    gpr_free(p);
+    p = next;
+  }
+  gpr_free(builder);
+}
+
+void *grpc_channel_stack_builder_finish(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_stack_builder *builder,
+                                        size_t prefix_bytes, int initial_refs,
+                                        grpc_iomgr_cb_func destroy,
+                                        void *destroy_arg) {
+  // count the number of filters
+  size_t num_filters = 0;
+  for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
+    num_filters++;
+  }
+
+  // create an array of filters
+  const grpc_channel_filter **filters =
+      gpr_malloc(sizeof(*filters) * num_filters);
+  size_t i = 0;
+  for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
+    filters[i++] = p->filter;
+  }
+
+  // calculate the size of the channel stack
+  size_t channel_stack_size = grpc_channel_stack_size(filters, num_filters);
+
+  // allocate memory, with prefix_bytes followed by channel_stack_size
+  char *result = gpr_malloc(prefix_bytes + channel_stack_size);
+  // fetch a pointer to the channel stack
+  grpc_channel_stack *channel_stack =
+      (grpc_channel_stack *)(result + prefix_bytes);
+  // and initialize it
+  grpc_channel_stack_init(exec_ctx, initial_refs, destroy,
+                          destroy_arg == NULL ? result : destroy_arg, filters,
+                          num_filters, builder->args, builder->name,
+                          channel_stack);
+
+  // run post-initialization functions
+  i = 0;
+  for (filter_node *p = builder->begin.next; p != &builder->end; p = p->next) {
+    if (p->init != NULL) {
+      p->init(channel_stack, grpc_channel_stack_element(channel_stack, i),
+              p->init_arg);
+    }
+    i++;
+  }
+
+  grpc_channel_stack_builder_destroy(builder);
+  gpr_free((grpc_channel_filter **)filters);
+
+  return result;
+}
diff --git a/src/core/channel/channel_stack_builder.h b/src/core/channel/channel_stack_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..15f395e8b8920a87ef603491b47cc5882b4e5998
--- /dev/null
+++ b/src/core/channel/channel_stack_builder.h
@@ -0,0 +1,155 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_CHANNEL_CHANNEL_STACK_BUILDER_H
+#define GRPC_CORE_CHANNEL_CHANNEL_STACK_BUILDER_H
+
+#include <stdbool.h>
+
+#include "src/core/channel/channel_args.h"
+#include "src/core/channel/channel_stack.h"
+
+/// grpc_channel_stack_builder offers a programmatic interface to selected
+/// and order channel filters
+typedef struct grpc_channel_stack_builder grpc_channel_stack_builder;
+typedef struct grpc_channel_stack_builder_iterator
+    grpc_channel_stack_builder_iterator;
+
+/// Create a new channel stack builder
+grpc_channel_stack_builder *grpc_channel_stack_builder_create(void);
+
+/// Assign a name to the channel stack: \a name must be statically allocated
+void grpc_channel_stack_builder_set_name(grpc_channel_stack_builder *builder,
+                                         const char *name);
+
+/// Attach \a transport to the builder (does not take ownership)
+void grpc_channel_stack_builder_set_transport(
+    grpc_channel_stack_builder *builder, grpc_transport *transport);
+
+/// Fetch attached transport
+grpc_transport *grpc_channel_stack_builder_get_transport(
+    grpc_channel_stack_builder *builder);
+
+/// Set channel arguments: \a args must continue to exist until after
+/// grpc_channel_stack_builder_finish returns
+void grpc_channel_stack_builder_set_channel_arguments(
+    grpc_channel_stack_builder *builder, const grpc_channel_args *args);
+
+/// Return a borrowed pointer to the channel arguments
+const grpc_channel_args *grpc_channel_stack_builder_get_channel_arguments(
+    grpc_channel_stack_builder *builder);
+
+/// Begin iterating over already defined filters in the builder at the beginning
+grpc_channel_stack_builder_iterator *
+grpc_channel_stack_builder_create_iterator_at_first(
+    grpc_channel_stack_builder *builder);
+
+/// Begin iterating over already defined filters in the builder at the end
+grpc_channel_stack_builder_iterator *
+grpc_channel_stack_builder_create_iterator_at_last(
+    grpc_channel_stack_builder *builder);
+
+/// Is an iterator at the first element?
+bool grpc_channel_stack_builder_iterator_is_first(
+    grpc_channel_stack_builder_iterator *iterator);
+
+/// Is an iterator at the end?
+bool grpc_channel_stack_builder_iterator_is_end(
+    grpc_channel_stack_builder_iterator *iterator);
+
+/// Move an iterator to the next item
+bool grpc_channel_stack_builder_move_next(
+    grpc_channel_stack_builder_iterator *iterator);
+
+/// Move an iterator to the previous item
+bool grpc_channel_stack_builder_move_prev(
+    grpc_channel_stack_builder_iterator *iterator);
+
+typedef void (*grpc_post_filter_create_init_func)(
+    grpc_channel_stack *channel_stack, grpc_channel_element *elem, void *arg);
+
+/// Add \a filter to the stack, after \a iterator.
+/// Call \a post_init_func(..., \a user_data) once the channel stack is
+/// created.
+bool grpc_channel_stack_builder_add_filter_after(
+    grpc_channel_stack_builder_iterator *iterator,
+    const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func,
+    void *user_data) GRPC_MUST_USE_RESULT;
+
+/// Add \a filter to the stack, before \a iterator.
+/// Call \a post_init_func(..., \a user_data) once the channel stack is
+/// created.
+bool grpc_channel_stack_builder_add_filter_before(
+    grpc_channel_stack_builder_iterator *iterator,
+    const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func,
+    void *user_data) GRPC_MUST_USE_RESULT;
+
+/// Add \a filter to the beginning of the filter list.
+/// Call \a post_init_func(..., \a user_data) once the channel stack is
+/// created.
+bool grpc_channel_stack_builder_prepend_filter(
+    grpc_channel_stack_builder *builder, const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func,
+    void *user_data) GRPC_MUST_USE_RESULT;
+
+/// Add \a filter to the end of the filter list.
+/// Call \a post_init_func(..., \a user_data) once the channel stack is
+/// created.
+bool grpc_channel_stack_builder_append_filter(
+    grpc_channel_stack_builder *builder, const grpc_channel_filter *filter,
+    grpc_post_filter_create_init_func post_init_func,
+    void *user_data) GRPC_MUST_USE_RESULT;
+
+/// Terminate iteration and destroy \a iterator
+void grpc_channel_stack_builder_iterator_destroy(
+    grpc_channel_stack_builder_iterator *iterator);
+
+/// Destroy the builder, return the freshly minted channel stack
+/// Allocates \a prefix_bytes bytes before the channel stack
+/// Returns the base pointer of the allocated block
+/// \a initial_refs, \a destroy, \a destroy_arg are as per
+/// grpc_channel_stack_init
+void *grpc_channel_stack_builder_finish(grpc_exec_ctx *exec_ctx,
+                                        grpc_channel_stack_builder *builder,
+                                        size_t prefix_bytes, int initial_refs,
+                                        grpc_iomgr_cb_func destroy,
+                                        void *destroy_arg);
+
+/// Destroy the builder without creating a channel stack
+void grpc_channel_stack_builder_destroy(grpc_channel_stack_builder *builder);
+
+extern int grpc_trace_channel_stack_builder;
+
+#endif /* GRPC_CORE_CHANNEL_CHANNEL_STACK_BUILDER_H */
diff --git a/src/core/channel/client_channel.h b/src/core/channel/client_channel.h
index d9bc4971f1ae51837b858186982e62d3f58815a3..422f7f83749b79c2eee9c7630c7e1a24bbf3f458 100644
--- a/src/core/channel/client_channel.h
+++ b/src/core/channel/client_channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CLIENT_CHANNEL_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CLIENT_CHANNEL_H
+#ifndef GRPC_CORE_CHANNEL_CLIENT_CHANNEL_H
+#define GRPC_CORE_CHANNEL_CLIENT_CHANNEL_H
 
 #include "src/core/channel/channel_stack.h"
 #include "src/core/client_config/resolver.h"
@@ -60,4 +60,4 @@ void grpc_client_channel_watch_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
     grpc_connectivity_state *state, grpc_closure *on_complete);
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CLIENT_CHANNEL_H */
+#endif /* GRPC_CORE_CHANNEL_CLIENT_CHANNEL_H */
diff --git a/src/core/channel/client_uchannel.c b/src/core/channel/client_uchannel.c
deleted file mode 100644
index 83fcc3a87f52f644f81b6a801edf9eb3b7522fc9..0000000000000000000000000000000000000000
--- a/src/core/channel/client_uchannel.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/channel/client_uchannel.h"
-
-#include <string.h>
-
-#include "src/core/census/grpc_filter.h"
-#include "src/core/channel/channel_args.h"
-#include "src/core/channel/client_channel.h"
-#include "src/core/channel/compress_filter.h"
-#include "src/core/channel/subchannel_call_holder.h"
-#include "src/core/iomgr/iomgr.h"
-#include "src/core/support/string.h"
-#include "src/core/surface/channel.h"
-#include "src/core/transport/connectivity_state.h"
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/sync.h>
-#include <grpc/support/useful.h>
-
-/** Microchannel (uchannel) implementation: a lightweight channel without any
- * load-balancing mechanisms meant for communication from within the core. */
-
-typedef struct client_uchannel_channel_data {
-  /** master channel - the grpc_channel instance that ultimately owns
-      this channel_data via its channel stack.
-      We occasionally use this to bump the refcount on the master channel
-      to keep ourselves alive through an asynchronous operation. */
-  grpc_channel_stack *owning_stack;
-
-  /** connectivity state being tracked */
-  grpc_connectivity_state_tracker state_tracker;
-
-  /** the subchannel wrapped by the microchannel */
-  grpc_connected_subchannel *connected_subchannel;
-
-  /** the callback used to stay subscribed to subchannel connectivity
-   * notifications */
-  grpc_closure connectivity_cb;
-
-  /** the current connectivity state of the wrapped subchannel */
-  grpc_connectivity_state subchannel_connectivity;
-
-  gpr_mu mu_state;
-} channel_data;
-
-typedef grpc_subchannel_call_holder call_data;
-
-static void monitor_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
-                               bool iomgr_success) {
-  channel_data *chand = arg;
-  grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
-                              chand->subchannel_connectivity,
-                              "uchannel_monitor_subchannel");
-  grpc_connected_subchannel_notify_on_state_change(
-      exec_ctx, chand->connected_subchannel, NULL,
-      &chand->subchannel_connectivity, &chand->connectivity_cb);
-}
-
-static char *cuc_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
-  return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data);
-}
-
-static void cuc_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
-                                          grpc_call_element *elem,
-                                          grpc_transport_stream_op *op) {
-  GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
-  grpc_subchannel_call_holder_perform_op(exec_ctx, elem->call_data, op);
-}
-
-static void cuc_start_transport_op(grpc_exec_ctx *exec_ctx,
-                                   grpc_channel_element *elem,
-                                   grpc_transport_op *op) {
-  channel_data *chand = elem->channel_data;
-
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL);
-
-  GPR_ASSERT(op->set_accept_stream == false);
-  GPR_ASSERT(op->bind_pollset == NULL);
-
-  if (op->on_connectivity_state_change != NULL) {
-    grpc_connectivity_state_notify_on_state_change(
-        exec_ctx, &chand->state_tracker, op->connectivity_state,
-        op->on_connectivity_state_change);
-    op->on_connectivity_state_change = NULL;
-    op->connectivity_state = NULL;
-  }
-
-  if (op->disconnect) {
-    grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
-                                GRPC_CHANNEL_FATAL_FAILURE, "disconnect");
-  }
-}
-
-static int cuc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
-                               grpc_metadata_batch *initial_metadata,
-                               grpc_connected_subchannel **connected_subchannel,
-                               grpc_closure *on_ready) {
-  channel_data *chand = arg;
-  GPR_ASSERT(initial_metadata != NULL);
-  *connected_subchannel = chand->connected_subchannel;
-  return 1;
-}
-
-/* Constructor for call_data */
-static void cuc_init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
-                               grpc_call_element_args *args) {
-  grpc_subchannel_call_holder_init(elem->call_data, cuc_pick_subchannel,
-                                   elem->channel_data, args->call_stack);
-}
-
-/* Destructor for call_data */
-static void cuc_destroy_call_elem(grpc_exec_ctx *exec_ctx,
-                                  grpc_call_element *elem) {
-  grpc_subchannel_call_holder_destroy(exec_ctx, elem->call_data);
-}
-
-/* Constructor for channel_data */
-static void cuc_init_channel_elem(grpc_exec_ctx *exec_ctx,
-                                  grpc_channel_element *elem,
-                                  grpc_channel_element_args *args) {
-  channel_data *chand = elem->channel_data;
-  memset(chand, 0, sizeof(*chand));
-  grpc_closure_init(&chand->connectivity_cb, monitor_subchannel, chand);
-  GPR_ASSERT(args->is_last);
-  GPR_ASSERT(elem->filter == &grpc_client_uchannel_filter);
-  chand->owning_stack = args->channel_stack;
-  grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
-                               "client_uchannel");
-  gpr_mu_init(&chand->mu_state);
-}
-
-/* Destructor for channel_data */
-static void cuc_destroy_channel_elem(grpc_exec_ctx *exec_ctx,
-                                     grpc_channel_element *elem) {
-  channel_data *chand = elem->channel_data;
-  /* cancel subscription */
-  grpc_connected_subchannel_notify_on_state_change(
-      exec_ctx, chand->connected_subchannel, NULL, NULL,
-      &chand->connectivity_cb);
-  grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
-  gpr_mu_destroy(&chand->mu_state);
-  GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, chand->connected_subchannel,
-                                  "uchannel");
-}
-
-static void cuc_set_pollset(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
-                            grpc_pollset *pollset) {
-  call_data *calld = elem->call_data;
-  calld->pollset = pollset;
-}
-
-const grpc_channel_filter grpc_client_uchannel_filter = {
-    cuc_start_transport_stream_op, cuc_start_transport_op, sizeof(call_data),
-    cuc_init_call_elem, cuc_set_pollset, cuc_destroy_call_elem,
-    sizeof(channel_data), cuc_init_channel_elem, cuc_destroy_channel_elem,
-    cuc_get_peer, "client-uchannel",
-};
-
-grpc_connectivity_state grpc_client_uchannel_check_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect) {
-  channel_data *chand = elem->channel_data;
-  grpc_connectivity_state out;
-  gpr_mu_lock(&chand->mu_state);
-  out = grpc_connectivity_state_check(&chand->state_tracker);
-  gpr_mu_unlock(&chand->mu_state);
-  return out;
-}
-
-void grpc_client_uchannel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
-    grpc_connectivity_state *state, grpc_closure *on_complete) {
-  channel_data *chand = elem->channel_data;
-  gpr_mu_lock(&chand->mu_state);
-  grpc_connectivity_state_notify_on_state_change(
-      exec_ctx, &chand->state_tracker, state, on_complete);
-  gpr_mu_unlock(&chand->mu_state);
-}
-
-grpc_channel *grpc_client_uchannel_create(grpc_subchannel *subchannel,
-                                          grpc_channel_args *args) {
-  grpc_channel *channel = NULL;
-#define MAX_FILTERS 3
-  const grpc_channel_filter *filters[MAX_FILTERS];
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  size_t n = 0;
-
-  if (grpc_channel_args_is_census_enabled(args)) {
-    filters[n++] = &grpc_client_census_filter;
-  }
-  filters[n++] = &grpc_compress_filter;
-  filters[n++] = &grpc_client_uchannel_filter;
-  GPR_ASSERT(n <= MAX_FILTERS);
-
-  channel =
-      grpc_channel_create_from_filters(&exec_ctx, NULL, filters, n, args, 1);
-
-  return channel;
-}
-
-void grpc_client_uchannel_set_connected_subchannel(
-    grpc_channel *uchannel, grpc_connected_subchannel *connected_subchannel) {
-  grpc_channel_element *elem =
-      grpc_channel_stack_last_element(grpc_channel_get_channel_stack(uchannel));
-  channel_data *chand = elem->channel_data;
-  GPR_ASSERT(elem->filter == &grpc_client_uchannel_filter);
-  gpr_mu_lock(&chand->mu_state);
-  chand->connected_subchannel = connected_subchannel;
-  GRPC_CONNECTED_SUBCHANNEL_REF(connected_subchannel, "uchannel");
-  gpr_mu_unlock(&chand->mu_state);
-}
diff --git a/src/core/channel/compress_filter.h b/src/core/channel/compress_filter.h
index 415459bca60991261a74e09b099119a2bf7242b4..8c208ac799dacff3f0cc7913910689c78bfe2b4b 100644
--- a/src/core/channel/compress_filter.h
+++ b/src/core/channel/compress_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H
-#define GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H
+#ifndef GRPC_CORE_CHANNEL_COMPRESS_FILTER_H
+#define GRPC_CORE_CHANNEL_COMPRESS_FILTER_H
 
 #include "src/core/channel/channel_stack.h"
 
@@ -62,4 +62,4 @@
 
 extern const grpc_channel_filter grpc_compress_filter;
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_COMPRESS_FILTER_H */
+#endif /* GRPC_CORE_CHANNEL_COMPRESS_FILTER_H */
diff --git a/src/core/channel/connected_channel.c b/src/core/channel/connected_channel.c
index e8eb9dcfc5cb2f78953ab04bf875366f8b389d91..e7ed3ccfebe83e599bcbb8b6c5234c1e2d880905 100644
--- a/src/core/channel/connected_channel.c
+++ b/src/core/channel/connected_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -67,7 +67,6 @@ static void con_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
                                           grpc_transport_stream_op *op) {
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
   GRPC_CALL_LOG_OP(GPR_INFO, elem, op);
 
   grpc_transport_perform_stream_op(exec_ctx, chand->transport,
@@ -88,7 +87,6 @@ static void init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
   channel_data *chand = elem->channel_data;
   int r;
 
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
   r = grpc_transport_init_stream(
       exec_ctx, chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
       &args->call_stack->refcount, args->server_transport_data);
@@ -108,7 +106,6 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx,
                               grpc_call_element *elem) {
   call_data *calld = elem->call_data;
   channel_data *chand = elem->channel_data;
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
   grpc_transport_destroy_stream(exec_ctx, chand->transport,
                                 TRANSPORT_STREAM_FROM_CALL_DATA(calld));
 }
@@ -119,7 +116,6 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
                               grpc_channel_element_args *args) {
   channel_data *cd = (channel_data *)elem->channel_data;
   GPR_ASSERT(args->is_last);
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
   cd->transport = NULL;
 }
 
@@ -127,7 +123,6 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
                                  grpc_channel_element *elem) {
   channel_data *cd = (channel_data *)elem->channel_data;
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
   grpc_transport_destroy(exec_ctx, cd->transport);
 }
 
@@ -136,21 +131,18 @@ static char *con_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
   return grpc_transport_get_peer(exec_ctx, chand->transport);
 }
 
-const grpc_channel_filter grpc_connected_channel_filter = {
+static const grpc_channel_filter connected_channel_filter = {
     con_start_transport_stream_op, con_start_transport_op, sizeof(call_data),
     init_call_elem, set_pollset, destroy_call_elem, sizeof(channel_data),
     init_channel_elem, destroy_channel_elem, con_get_peer, "connected",
 };
 
-void grpc_connected_channel_bind_transport(grpc_channel_stack *channel_stack,
-                                           grpc_transport *transport) {
-  /* Assumes that the connected channel filter is always the last filter
-     in a channel stack */
-  grpc_channel_element *elem = grpc_channel_stack_last_element(channel_stack);
+static void bind_transport(grpc_channel_stack *channel_stack,
+                           grpc_channel_element *elem, void *t) {
   channel_data *cd = (channel_data *)elem->channel_data;
-  GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
+  GPR_ASSERT(elem->filter == &connected_channel_filter);
   GPR_ASSERT(cd->transport == NULL);
-  cd->transport = transport;
+  cd->transport = t;
 
   /* HACK(ctiller): increase call stack size for the channel to make space
      for channel data. We need a cleaner (but performant) way to do this,
@@ -158,7 +150,16 @@ void grpc_connected_channel_bind_transport(grpc_channel_stack *channel_stack,
      This is only "safe" because call stacks place no additional data after
      the last call element, and the last call element MUST be the connected
      channel. */
-  channel_stack->call_stack_size += grpc_transport_stream_size(transport);
+  channel_stack->call_stack_size += grpc_transport_stream_size(t);
+}
+
+bool grpc_add_connected_filter(grpc_channel_stack_builder *builder,
+                               void *arg_must_be_null) {
+  GPR_ASSERT(arg_must_be_null == NULL);
+  grpc_transport *t = grpc_channel_stack_builder_get_transport(builder);
+  GPR_ASSERT(t != NULL);
+  return grpc_channel_stack_builder_append_filter(
+      builder, &connected_channel_filter, bind_transport, t);
 }
 
 grpc_stream *grpc_connected_channel_get_stream(grpc_call_element *elem) {
diff --git a/src/core/channel/connected_channel.h b/src/core/channel/connected_channel.h
index 95c1834bfaab498bc10c6dbf4b8b14d6901d993d..7c0c8359a496684193cc4b067e697a8dff2d8f66 100644
--- a/src/core/channel/connected_channel.h
+++ b/src/core/channel/connected_channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,21 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CONNECTED_CHANNEL_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CONNECTED_CHANNEL_H
+#ifndef GRPC_CORE_CHANNEL_CONNECTED_CHANNEL_H
+#define GRPC_CORE_CHANNEL_CONNECTED_CHANNEL_H
 
-#include "src/core/channel/channel_stack.h"
+#include "src/core/channel/channel_stack_builder.h"
 
-/* A channel filter representing a channel that is on a connected transport.
-   This filter performs actual sending and receiving of messages. */
+bool grpc_add_connected_filter(grpc_channel_stack_builder *builder,
+                               void *arg_must_be_null);
 
-extern const grpc_channel_filter grpc_connected_channel_filter;
-
-/* Post construction fixup: set the transport in the connected channel.
-   Must be called before any call stack using this filter is used. */
-void grpc_connected_channel_bind_transport(grpc_channel_stack* channel_stack,
-                                           grpc_transport* transport);
-
-grpc_stream* grpc_connected_channel_get_stream(grpc_call_element* elem);
-
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CONNECTED_CHANNEL_H */
+#endif /* GRPC_CORE_CHANNEL_CONNECTED_CHANNEL_H */
diff --git a/src/core/channel/context.h b/src/core/channel/context.h
index ac5796b9ef19fce5968790a791d56c0e86708dc3..db217dc133d8bb9512a4d29400143d061e0700d3 100644
--- a/src/core/channel/context.h
+++ b/src/core/channel/context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CONTEXT_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CONTEXT_H
+#ifndef GRPC_CORE_CHANNEL_CONTEXT_H
+#define GRPC_CORE_CHANNEL_CONTEXT_H
 
 /* Call object context pointers */
 typedef enum {
@@ -46,4 +46,4 @@ typedef struct {
   void (*destroy)(void *);
 } grpc_call_context_element;
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CONTEXT_H */
+#endif /* GRPC_CORE_CHANNEL_CONTEXT_H */
diff --git a/src/core/channel/http_client_filter.h b/src/core/channel/http_client_filter.h
index 21c66b9b8ee758aa9a3851d10b6e1f7375f397c7..6f619bbf0028d41568f54ab71c3aade6cc3ad8ce 100644
--- a/src/core/channel/http_client_filter.h
+++ b/src/core/channel/http_client_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_HTTP_CLIENT_FILTER_H
-#define GRPC_INTERNAL_CORE_CHANNEL_HTTP_CLIENT_FILTER_H
+#ifndef GRPC_CORE_CHANNEL_HTTP_CLIENT_FILTER_H
+#define GRPC_CORE_CHANNEL_HTTP_CLIENT_FILTER_H
 
 #include "src/core/channel/channel_stack.h"
 
@@ -41,4 +41,4 @@ extern const grpc_channel_filter grpc_http_client_filter;
 
 #define GRPC_ARG_HTTP2_SCHEME "grpc.http2_scheme"
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_HTTP_CLIENT_FILTER_H */
+#endif /* GRPC_CORE_CHANNEL_HTTP_CLIENT_FILTER_H */
diff --git a/src/core/channel/http_server_filter.h b/src/core/channel/http_server_filter.h
index f219d4e66f38724c2143c3fb46f2f081ffff02a2..528c8648fde13ad3584727f23f758b4ce9eafac6 100644
--- a/src/core/channel/http_server_filter.h
+++ b/src/core/channel/http_server_filter.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_HTTP_SERVER_FILTER_H
-#define GRPC_INTERNAL_CORE_CHANNEL_HTTP_SERVER_FILTER_H
+#ifndef GRPC_CORE_CHANNEL_HTTP_SERVER_FILTER_H
+#define GRPC_CORE_CHANNEL_HTTP_SERVER_FILTER_H
 
 #include "src/core/channel/channel_stack.h"
 
 /* Processes metadata on the client side for HTTP2 transports */
 extern const grpc_channel_filter grpc_http_server_filter;
 
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_HTTP_SERVER_FILTER_H */
+#endif /* GRPC_CORE_CHANNEL_HTTP_SERVER_FILTER_H */
diff --git a/src/core/channel/subchannel_call_holder.h b/src/core/channel/subchannel_call_holder.h
index 9cf72c6cf76a1cb0e9284f0f2f92097e2eb33549..84b4657db420c1bcba7a1c0320f7bedd0e87fb81 100644
--- a/src/core/channel/subchannel_call_holder.h
+++ b/src/core/channel/subchannel_call_holder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_SUBCHANNEL_CALL_HOLDER_H
-#define GRPC_INTERNAL_CORE_CHANNEL_SUBCHANNEL_CALL_HOLDER_H
+#ifndef GRPC_CORE_CHANNEL_SUBCHANNEL_CALL_HOLDER_H
+#define GRPC_CORE_CHANNEL_SUBCHANNEL_CALL_HOLDER_H
 
 #include "src/core/client_config/subchannel.h"
 
@@ -55,15 +55,14 @@ typedef enum {
     for initial metadata before trying to create a call object,
     and handling cancellation gracefully.
 
-    Both the channel and uchannel filter use this as their call_data. */
+    The channel filter uses this as their call_data. */
 typedef struct grpc_subchannel_call_holder {
   /** either 0 for no call, 1 for cancelled, or a pointer to a
       grpc_subchannel_call */
   gpr_atm subchannel_call;
   /** Helper function to choose the subchannel on which to create
       the call object. Channel filter delegates to the load
-      balancing policy (once it's ready); uchannel returns
-      immediately */
+      balancing policy (once it's ready). */
   grpc_subchannel_call_holder_pick_subchannel pick_subchannel;
   void *pick_subchannel_arg;
 
@@ -95,4 +94,4 @@ void grpc_subchannel_call_holder_perform_op(grpc_exec_ctx *exec_ctx,
 char *grpc_subchannel_call_holder_get_peer(grpc_exec_ctx *exec_ctx,
                                            grpc_subchannel_call_holder *holder);
 
-#endif
+#endif /* GRPC_CORE_CHANNEL_SUBCHANNEL_CALL_HOLDER_H */
diff --git a/src/core/client_config/client_config.h b/src/core/client_config/client_config.h
index 04bf036b00b7e411b4dd334d7a3a649f76ada26c..9b37fdc2116fa78a16e0bd1886da0406be78db43 100644
--- a/src/core/client_config/client_config.h
+++ b/src/core/client_config/client_config.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H
+#define GRPC_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H
 
 #include "src/core/client_config/lb_policy.h"
 
@@ -50,4 +50,4 @@ void grpc_client_config_set_lb_policy(grpc_client_config *client_config,
 grpc_lb_policy *grpc_client_config_get_lb_policy(
     grpc_client_config *client_config);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_CLIENT_CONFIG_H */
diff --git a/src/core/client_config/connector.h b/src/core/client_config/connector.h
index b91eb512c3016e9a855209a70a24ad252fc29b82..93248fca4ba1bc0cd50935aafdafd394917bac29 100644
--- a/src/core/client_config/connector.h
+++ b/src/core/client_config/connector.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_CONNECTOR_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_CONNECTOR_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_CONNECTOR_H
+#define GRPC_CORE_CLIENT_CONFIG_CONNECTOR_H
 
 #include "src/core/channel/channel_stack.h"
 #include "src/core/iomgr/sockaddr.h"
@@ -62,9 +62,6 @@ typedef struct {
 typedef struct {
   /** the connected transport */
   grpc_transport *transport;
-  /** any additional filters (owned by the caller of connect) */
-  const grpc_channel_filter **filters;
-  size_t num_filters;
 
   /** channel arguments (to be passed to the filters) */
   const grpc_channel_args *channel_args;
@@ -92,4 +89,4 @@ void grpc_connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *connector,
 void grpc_connector_shutdown(grpc_exec_ctx *exec_ctx,
                              grpc_connector *connector);
 
-#endif
+#endif /* GRPC_CORE_CLIENT_CONFIG_CONNECTOR_H */
diff --git a/src/core/client_config/initial_connect_string.h b/src/core/client_config/initial_connect_string.h
index b6dca7134a4345cc0c0989abe56f88c72442d7d3..e6d2d8f8fef754ad01493c5950a8053fb54e65cd 100644
--- a/src/core/client_config/initial_connect_string.h
+++ b/src/core/client_config/initial_connect_string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H
+#define GRPC_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H
 
 #include <grpc/support/slice.h>
 #include "src/core/iomgr/sockaddr.h"
@@ -47,4 +47,4 @@ void grpc_test_set_initial_connect_string_function(
 void grpc_set_initial_connect_string(struct sockaddr **addr, size_t *addr_len,
                                      gpr_slice *connect_string);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_INITIAL_CONNECT_STRING_H */
diff --git a/src/core/client_config/lb_policies/load_balancer_api.h b/src/core/client_config/lb_policies/load_balancer_api.h
index 4dbe1d6c224ef595fe82cf3812c25f0293ae78c9..b7a4c9c8f5bb280c14552fdf8eefb879ba9de949 100644
--- a/src/core/client_config/lb_policies/load_balancer_api.h
+++ b/src/core/client_config/lb_policies/load_balancer_api.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H
 
 #include <grpc/support/slice_buffer.h>
 
@@ -82,4 +82,4 @@ void grpc_grpclb_response_destroy(grpc_grpclb_response *response);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_LOAD_BALANCER_API_H */
diff --git a/src/core/client_config/lb_policies/pick_first.h b/src/core/client_config/lb_policies/pick_first.h
index 3ca53ad42afa8c774c0187fb817abc7d6293ebb0..3a3f195df52a57e45e103684087f795341a9bcb6 100644
--- a/src/core/client_config/lb_policies/pick_first.h
+++ b/src/core/client_config/lb_policies/pick_first.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_PICK_FIRST_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_PICK_FIRST_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H
 
 #include "src/core/client_config/lb_policy_factory.h"
 
@@ -40,4 +40,4 @@
  * the first subchannel from \a subchannels to succesfully connect */
 grpc_lb_policy_factory *grpc_pick_first_lb_factory_create();
 
-#endif
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_PICK_FIRST_H */
diff --git a/src/core/client_config/lb_policies/round_robin.h b/src/core/client_config/lb_policies/round_robin.h
index cf1f69c85f6dca3ef345110aeba35e23275be24e..7e6f1769e487adead97a615392d38af192fcb8ba 100644
--- a/src/core/client_config/lb_policies/round_robin.h
+++ b/src/core/client_config/lb_policies/round_robin.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_ROUND_ROBIN_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_ROUND_ROBIN_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H
 
 #include "src/core/client_config/lb_policy.h"
 
@@ -43,4 +43,4 @@ extern int grpc_lb_round_robin_trace;
 /** Returns a load balancing factory for the round robin policy */
 grpc_lb_policy_factory *grpc_round_robin_lb_factory_create();
 
-#endif
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICIES_ROUND_ROBIN_H */
diff --git a/src/core/client_config/lb_policy.h b/src/core/client_config/lb_policy.h
index 345739060682c0fb96fbd7f41c81a00546ab84b2..ffebc2a69ca14b2590cdfb6dbe60a51381fdd76d 100644
--- a/src/core/client_config/lb_policy.h
+++ b/src/core/client_config/lb_policy.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICY_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICY_H
 
 #include "src/core/client_config/subchannel.h"
 #include "src/core/transport/connectivity_state.h"
@@ -141,4 +141,4 @@ void grpc_lb_policy_notify_on_state_change(grpc_exec_ctx *exec_ctx,
 grpc_connectivity_state grpc_lb_policy_check_connectivity(
     grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 
-#endif /* GRPC_INTERNAL_CORE_CONFIG_LB_POLICY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICY_H */
diff --git a/src/core/client_config/lb_policy_factory.h b/src/core/client_config/lb_policy_factory.h
index 04610316ee4300bed4b5bfa1804928d2366a44fe..842ba9609865c24ce019f13aa4cf1de51cf659dd 100644
--- a/src/core/client_config/lb_policy_factory.h
+++ b/src/core/client_config/lb_policy_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_FACTORY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_FACTORY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICY_FACTORY_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICY_FACTORY_H
 
 #include "src/core/client_config/lb_policy.h"
 #include "src/core/client_config/subchannel.h"
@@ -70,4 +70,4 @@ void grpc_lb_policy_factory_unref(grpc_lb_policy_factory *factory);
 grpc_lb_policy *grpc_lb_policy_factory_create_lb_policy(
     grpc_lb_policy_factory *factory, grpc_lb_policy_args *args);
 
-#endif /* GRPC_INTERNAL_CORE_CONFIG_LB_POLICY_FACTORY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICY_FACTORY_H */
diff --git a/src/core/client_config/lb_policy_registry.h b/src/core/client_config/lb_policy_registry.h
index 96fc2a162851371def9028ebfbe61f89be6e553e..f3a08a3558bd3f21b5a15c65d1dfafdf83a653d4 100644
--- a/src/core/client_config/lb_policy_registry.h
+++ b/src/core/client_config/lb_policy_registry.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H
+#define GRPC_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H
 
 #include "src/core/client_config/lb_policy_factory.h"
 
@@ -51,4 +51,4 @@ void grpc_register_lb_policy(grpc_lb_policy_factory *factory);
 grpc_lb_policy *grpc_lb_policy_create(const char *name,
                                       grpc_lb_policy_args *args);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_LB_POLICY_REGISTRY_H */
diff --git a/src/core/client_config/resolver.h b/src/core/client_config/resolver.h
index e612eaf3b3cacddd942203d72fbd4ab114f2b0c5..96f88fef84dd46077421bf50a33cbd4b912f376f 100644
--- a/src/core/client_config/resolver.h
+++ b/src/core/client_config/resolver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVER_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVER_H
 
 #include "src/core/client_config/client_config.h"
 #include "src/core/client_config/subchannel.h"
@@ -91,4 +91,4 @@ void grpc_resolver_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
                         grpc_client_config **target_config,
                         grpc_closure *on_complete);
 
-#endif /* GRPC_INTERNAL_CORE_CONFIG_RESOLVER_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVER_H */
diff --git a/src/core/client_config/resolver_factory.h b/src/core/client_config/resolver_factory.h
index 4c4df353f7cbcee3f6096a749bcff2c1c172472a..477f8db7f7113d77be6cc64fcb6fd993038c6151 100644
--- a/src/core/client_config/resolver_factory.h
+++ b/src/core/client_config/resolver_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_FACTORY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_FACTORY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVER_FACTORY_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVER_FACTORY_H
 
 #include "src/core/client_config/resolver.h"
 #include "src/core/client_config/subchannel_factory.h"
@@ -79,4 +79,4 @@ grpc_resolver *grpc_resolver_factory_create_resolver(
 char *grpc_resolver_factory_get_default_authority(
     grpc_resolver_factory *factory, grpc_uri *uri);
 
-#endif /* GRPC_INTERNAL_CORE_CONFIG_RESOLVER_FACTORY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVER_FACTORY_H */
diff --git a/src/core/client_config/resolver_registry.h b/src/core/client_config/resolver_registry.h
index 5a7193b7ae258ace3cda801f1699378423f2243c..1e4cebee0baa7053a4a1fc758d632ef4d37c6008 100644
--- a/src/core/client_config/resolver_registry.h
+++ b/src/core/client_config/resolver_registry.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H
 
 #include "src/core/client_config/resolver_factory.h"
 
@@ -62,4 +62,4 @@ grpc_resolver *grpc_resolver_create(
     representing the default authority to pass from a client. */
 char *grpc_get_default_authority(const char *target);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVER_REGISTRY_H */
diff --git a/src/core/client_config/resolvers/dns_resolver.c b/src/core/client_config/resolvers/dns_resolver.c
index e28e4757a107bfa01a5d53864885f06509d7114f..2b2ee97e12a5f810e2eb502cd008654e2d1372a8 100644
--- a/src/core/client_config/resolvers/dns_resolver.c
+++ b/src/core/client_config/resolvers/dns_resolver.c
@@ -42,8 +42,14 @@
 #include "src/core/client_config/lb_policy_registry.h"
 #include "src/core/iomgr/resolve_address.h"
 #include "src/core/iomgr/timer.h"
+#include "src/core/support/backoff.h"
 #include "src/core/support/string.h"
 
+#define BACKOFF_MULTIPLIER 1.6
+#define BACKOFF_JITTER 0.2
+#define BACKOFF_MIN_SECONDS 1
+#define BACKOFF_MAX_SECONDS 120
+
 typedef struct {
   /** base class: must be first */
   grpc_resolver base;
@@ -75,6 +81,8 @@ typedef struct {
   /** retry timer */
   bool have_retry_timer;
   grpc_timer retry_timer;
+  /** retry backoff state */
+  gpr_backoff backoff_state;
 } dns_resolver;
 
 static void dns_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
@@ -111,6 +119,7 @@ static void dns_channel_saw_error(grpc_exec_ctx *exec_ctx,
   dns_resolver *r = (dns_resolver *)resolver;
   gpr_mu_lock(&r->mu);
   if (!r->resolving) {
+    gpr_backoff_reset(&r->backoff_state);
     dns_start_resolving_locked(r);
   }
   gpr_mu_unlock(&r->mu);
@@ -125,6 +134,7 @@ static void dns_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
   r->next_completion = on_complete;
   r->target_config = target_config;
   if (r->resolved_version == 0 && !r->resolving) {
+    gpr_backoff_reset(&r->backoff_state);
     dns_start_resolving_locked(r);
   } else {
     dns_maybe_finish_next_locked(exec_ctx, r);
@@ -185,17 +195,16 @@ static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
     grpc_resolved_addresses_destroy(addresses);
     gpr_free(subchannels);
   } else {
-    int retry_seconds = 15;
-    gpr_log(GPR_DEBUG, "dns resolution failed: retrying in %d seconds",
-            retry_seconds);
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    gpr_timespec next_try = gpr_backoff_step(&r->backoff_state, now);
+    gpr_timespec timeout = gpr_time_sub(next_try, now);
+    gpr_log(GPR_DEBUG, "dns resolution failed: retrying in %d.%09d seconds",
+            timeout.tv_sec, timeout.tv_nsec);
     GPR_ASSERT(!r->have_retry_timer);
     r->have_retry_timer = true;
-    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
     GRPC_RESOLVER_REF(&r->base, "retry-timer");
-    grpc_timer_init(
-        exec_ctx, &r->retry_timer,
-        gpr_time_add(now, gpr_time_from_seconds(retry_seconds, GPR_TIMESPAN)),
-        dns_on_retry_timer, r, now);
+    grpc_timer_init(exec_ctx, &r->retry_timer, next_try, dns_on_retry_timer, r,
+                    now);
   }
   if (r->resolved_config) {
     grpc_client_config_unref(exec_ctx, r->resolved_config);
@@ -263,6 +272,8 @@ static grpc_resolver *dns_create(grpc_resolver_args *args,
   r->name = gpr_strdup(path);
   r->default_port = gpr_strdup(default_port);
   r->subchannel_factory = args->subchannel_factory;
+  gpr_backoff_init(&r->backoff_state, BACKOFF_MULTIPLIER, BACKOFF_JITTER,
+                   BACKOFF_MIN_SECONDS * 1000, BACKOFF_MAX_SECONDS * 1000);
   grpc_subchannel_factory_ref(r->subchannel_factory);
   r->lb_policy_name = gpr_strdup(lb_policy_name);
   return &r->base;
diff --git a/src/core/client_config/resolvers/dns_resolver.h b/src/core/client_config/resolvers/dns_resolver.h
index a3ef3161a63f6c6087525faaf4b391bee0877296..b24280b507c2faf4ecaed18378141284d39f241c 100644
--- a/src/core/client_config/resolvers/dns_resolver.h
+++ b/src/core/client_config/resolvers/dns_resolver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H
 
 #include "src/core/client_config/resolver_factory.h"
 
 /** Create a dns resolver factory */
 grpc_resolver_factory *grpc_dns_resolver_factory_create(void);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVERS_DNS_RESOLVER_H */
diff --git a/src/core/client_config/resolvers/sockaddr_resolver.c b/src/core/client_config/resolvers/sockaddr_resolver.c
index 68910ad975b6ab5b93d7bd7444b07dd646fd55b9..3cb7d79b67adc3261ff523a950b2b0f322f3051f 100644
--- a/src/core/client_config/resolvers/sockaddr_resolver.c
+++ b/src/core/client_config/resolvers/sockaddr_resolver.c
@@ -37,9 +37,6 @@
 
 #include <stdio.h>
 #include <string.h>
-#ifdef GPR_POSIX_SOCKET
-#include <sys/un.h>
-#endif
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
@@ -47,6 +44,7 @@
 
 #include "src/core/client_config/lb_policy_registry.h"
 #include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/string.h"
 
 typedef struct {
@@ -168,24 +166,6 @@ static void sockaddr_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *gr) {
   gpr_free(r);
 }
 
-#ifdef GPR_POSIX_SOCKET
-static int parse_unix(grpc_uri *uri, struct sockaddr_storage *addr,
-                      size_t *len) {
-  struct sockaddr_un *un = (struct sockaddr_un *)addr;
-
-  un->sun_family = AF_UNIX;
-  strcpy(un->sun_path, uri->path);
-  *len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
-
-  return 1;
-}
-
-static char *unix_get_default_authority(grpc_resolver_factory *factory,
-                                        grpc_uri *uri) {
-  return gpr_strdup("localhost");
-}
-#endif
-
 static char *ip_get_default_authority(grpc_uri *uri) {
   const char *path = uri->path;
   if (path[0] == '/') ++path;
@@ -371,21 +351,22 @@ static void sockaddr_factory_ref(grpc_resolver_factory *factory) {}
 
 static void sockaddr_factory_unref(grpc_resolver_factory *factory) {}
 
-#define DECL_FACTORY(name)                                                  \
+#define DECL_FACTORY(name, prefix)                                          \
   static grpc_resolver *name##_factory_create_resolver(                     \
       grpc_resolver_factory *factory, grpc_resolver_args *args) {           \
-    return sockaddr_create(args, "pick_first", parse_##name);               \
+    return sockaddr_create(args, "pick_first", prefix##parse_##name);       \
   }                                                                         \
   static const grpc_resolver_factory_vtable name##_factory_vtable = {       \
       sockaddr_factory_ref, sockaddr_factory_unref,                         \
-      name##_factory_create_resolver, name##_get_default_authority, #name}; \
+      name##_factory_create_resolver, prefix##name##_get_default_authority, \
+      #name};                                                               \
   static grpc_resolver_factory name##_resolver_factory = {                  \
       &name##_factory_vtable};                                              \
   grpc_resolver_factory *grpc_##name##_resolver_factory_create() {          \
     return &name##_resolver_factory;                                        \
   }
 
-#ifdef GPR_POSIX_SOCKET
-DECL_FACTORY(unix)
+#ifdef GPR_HAVE_UNIX_SOCKET
+DECL_FACTORY(unix, grpc_)
 #endif
-DECL_FACTORY(ipv4) DECL_FACTORY(ipv6)
+DECL_FACTORY(ipv4, ) DECL_FACTORY(ipv6, )
diff --git a/src/core/client_config/resolvers/sockaddr_resolver.h b/src/core/client_config/resolvers/sockaddr_resolver.h
index 1b7a18f9c2ac272950922162272afe37706577ef..f050329431e5ed4b5673ee6e962d5b48e556ad45 100644
--- a/src/core/client_config/resolvers/sockaddr_resolver.h
+++ b/src/core/client_config/resolvers/sockaddr_resolver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H
 
 #include <grpc/support/port_platform.h>
 
@@ -47,4 +47,4 @@ grpc_resolver_factory *grpc_ipv6_resolver_factory_create(void);
 grpc_resolver_factory *grpc_unix_resolver_factory_create(void);
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_UNIX_RESOLVER_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVERS_SOCKADDR_RESOLVER_H */
diff --git a/src/core/client_config/resolvers/zookeeper_resolver.h b/src/core/client_config/resolvers/zookeeper_resolver.h
index a6f002dd6d487bc7bb098fa4991cbf86ee744865..04bd3ca875e5937c014e48e20c4da21ee668dda9 100644
--- a/src/core/client_config/resolvers/zookeeper_resolver.h
+++ b/src/core/client_config/resolvers/zookeeper_resolver.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
+#define GRPC_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H
 
 #include "src/core/client_config/resolver_factory.h"
 
 /** Create a zookeeper resolver factory */
 grpc_resolver_factory *grpc_zookeeper_resolver_factory_create(void);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_RESOLVERS_ZOOKEEPER_RESOLVER_H */
diff --git a/src/core/client_config/subchannel.c b/src/core/client_config/subchannel.c
index 5dea21566853015b300b22cb07d0d0f01ce101a9..8f150a8d81df693ef15f688cd2f6d1d30107d336 100644
--- a/src/core/client_config/subchannel.c
+++ b/src/core/client_config/subchannel.c
@@ -47,6 +47,7 @@
 #include "src/core/profiling/timers.h"
 #include "src/core/support/backoff.h"
 #include "src/core/surface/channel.h"
+#include "src/core/surface/channel_init.h"
 #include "src/core/transport/connectivity_state.h"
 
 #define INTERNAL_REF_BITS 16
@@ -521,32 +522,15 @@ void grpc_connected_subchannel_ping(grpc_exec_ctx *exec_ctx,
 
 static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
                                      grpc_subchannel *c) {
-  size_t channel_stack_size;
   grpc_connected_subchannel *con;
   grpc_channel_stack *stk;
-  size_t num_filters;
-  const grpc_channel_filter **filters;
   state_watcher *sw_subchannel;
 
-  /* build final filter list */
-  num_filters = c->num_filters + c->connecting_result.num_filters + 1;
-  filters = gpr_malloc(sizeof(*filters) * num_filters);
-  if (c->num_filters > 0) {
-    memcpy((void *)filters, c->filters, sizeof(*filters) * c->num_filters);
-  }
-  memcpy((void *)(filters + c->num_filters), c->connecting_result.filters,
-         sizeof(*filters) * c->connecting_result.num_filters);
-  filters[num_filters - 1] = &grpc_connected_channel_filter;
-
   /* construct channel stack */
-  channel_stack_size = grpc_channel_stack_size(filters, num_filters);
-  con = gpr_malloc(channel_stack_size);
+  con = grpc_channel_init_create_stack(
+      exec_ctx, GRPC_CLIENT_SUBCHANNEL, 0, c->connecting_result.channel_args, 1,
+      connection_destroy, NULL, c->connecting_result.transport);
   stk = CHANNEL_STACK_FROM_CONNECTION(con);
-  grpc_channel_stack_init(exec_ctx, 1, connection_destroy, con, filters,
-                          num_filters, c->connecting_result.channel_args,
-                          "CONNECTED_SUBCHANNEL", stk);
-  grpc_connected_channel_bind_transport(stk, c->connecting_result.transport);
-  gpr_free((void *)c->connecting_result.filters);
   memset(&c->connecting_result, 0, sizeof(c->connecting_result));
 
   /* initialize state watcher */
@@ -557,9 +541,7 @@ static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
                     sw_subchannel);
 
   if (c->disconnected) {
-    gpr_mu_unlock(&c->mu);
     gpr_free(sw_subchannel);
-    gpr_free((void *)filters);
     grpc_channel_stack_destroy(exec_ctx, stk);
     gpr_free(con);
     GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
@@ -587,8 +569,6 @@ static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
   /* signal completion */
   grpc_connectivity_state_set(exec_ctx, &c->state_tracker, GRPC_CHANNEL_READY,
                               "connected");
-
-  gpr_free((void *)filters);
 }
 
 static void on_alarm(grpc_exec_ctx *exec_ctx, void *arg, bool iomgr_success) {
diff --git a/src/core/client_config/subchannel.h b/src/core/client_config/subchannel.h
index 313e63c75c83ac1a47bd05ace90cb8a00c4eb5be..ef9f2f1d1e06d2d4cc4ad35a208cdbd10a0f11eb 100644
--- a/src/core/client_config/subchannel.h
+++ b/src/core/client_config/subchannel.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_H
+#define GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_H
 
 #include "src/core/channel/channel_stack.h"
 #include "src/core/client_config/connector.h"
@@ -171,4 +171,4 @@ grpc_subchannel *grpc_subchannel_create(grpc_exec_ctx *exec_ctx,
                                         grpc_connector *connector,
                                         grpc_subchannel_args *args);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_H */
diff --git a/src/core/client_config/subchannel_factory.h b/src/core/client_config/subchannel_factory.h
index c6d8cc90bed7f262577b2f1fe937ccd3d62ee232..c638f377a6049dde65bcac59d657aa5a62000d88 100644
--- a/src/core/client_config/subchannel_factory.h
+++ b/src/core/client_config/subchannel_factory.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H
+#define GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H
 
 #include "src/core/channel/channel_stack.h"
 #include "src/core/client_config/subchannel.h"
@@ -63,4 +63,4 @@ grpc_subchannel *grpc_subchannel_factory_create_subchannel(
     grpc_exec_ctx *exec_ctx, grpc_subchannel_factory *factory,
     grpc_subchannel_args *args);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_FACTORY_H */
diff --git a/src/core/client_config/subchannel_index.c b/src/core/client_config/subchannel_index.c
index 3f948998f9cae1f4f4d81ae46c2ce51ffdedcc7b..24cc76cf225ce0590a9624d4225b410211a98952 100644
--- a/src/core/client_config/subchannel_index.c
+++ b/src/core/client_config/subchannel_index.c
@@ -108,6 +108,7 @@ static int subchannel_key_compare(grpc_subchannel_key *a,
   if (c != 0) return c;
   c = memcmp(a->args.filters, b->args.filters,
              a->args.filter_count * sizeof(*a->args.filters));
+  if (c != 0) return c;
   return grpc_channel_args_compare(a->args.args, b->args.args);
 }
 
diff --git a/src/core/client_config/subchannel_index.h b/src/core/client_config/subchannel_index.h
index 095ef178194bc397fc934b6642dd9bc3b1ced054..3cd5d12349295965f664b65402804b23f1ddf1dc 100644
--- a/src/core/client_config/subchannel_index.h
+++ b/src/core/client_config/subchannel_index.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H
+#define GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H
 
 #include "src/core/client_config/connector.h"
 #include "src/core/client_config/subchannel.h"
@@ -74,4 +74,4 @@ void grpc_subchannel_index_init(void);
 /** Shutdown the subchannel index (global) */
 void grpc_subchannel_index_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H */
+#endif /* GRPC_CORE_CLIENT_CONFIG_SUBCHANNEL_INDEX_H */
diff --git a/src/core/client_config/uri_parser.h b/src/core/client_config/uri_parser.h
index b8daa13bd4f66a0f39ccc210fab025851e3f026c..af013d8cac66ad45316f0eabf858bf04aee86136 100644
--- a/src/core/client_config/uri_parser.h
+++ b/src/core/client_config/uri_parser.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CLIENT_CONFIG_URI_PARSER_H
-#define GRPC_INTERNAL_CORE_CLIENT_CONFIG_URI_PARSER_H
+#ifndef GRPC_CORE_CLIENT_CONFIG_URI_PARSER_H
+#define GRPC_CORE_CLIENT_CONFIG_URI_PARSER_H
 
 typedef struct {
   char *scheme;
@@ -48,4 +48,4 @@ grpc_uri *grpc_uri_parse(const char *uri_text, int suppress_errors);
 /** destroy a uri */
 void grpc_uri_destroy(grpc_uri *uri);
 
-#endif
+#endif /* GRPC_CORE_CLIENT_CONFIG_URI_PARSER_H */
diff --git a/src/core/compression/algorithm_metadata.h b/src/core/compression/algorithm_metadata.h
index 882633c3074ebd8dcd5ac5393b2097990aeeab30..34abf1dba29d2f5b5429d954ae4b78c644d041c8 100644
--- a/src/core/compression/algorithm_metadata.h
+++ b/src/core/compression/algorithm_metadata.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_COMPRESSION_ALGORITHM_METADATA_H
-#define GRPC_INTERNAL_CORE_COMPRESSION_ALGORITHM_METADATA_H
+#ifndef GRPC_CORE_COMPRESSION_ALGORITHM_METADATA_H
+#define GRPC_CORE_COMPRESSION_ALGORITHM_METADATA_H
 
 #include <grpc/compression.h>
 #include "src/core/transport/metadata.h"
@@ -50,4 +50,4 @@ grpc_mdelem *grpc_compression_encoding_mdelem(
 grpc_compression_algorithm grpc_compression_algorithm_from_mdstr(
     grpc_mdstr *str);
 
-#endif /* GRPC_INTERNAL_CORE_COMPRESSION_ALGORITHM_METADATA_H */
+#endif /* GRPC_CORE_COMPRESSION_ALGORITHM_METADATA_H */
diff --git a/src/core/compression/compression_algorithm.c b/src/core/compression/compression_algorithm.c
index 6f3a8eb28e63a37cacae8e1a8f118ba2358ecaa5..2810a38b68afc143652ac168ed00ea7b6626d197 100644
--- a/src/core/compression/compression_algorithm.c
+++ b/src/core/compression/compression_algorithm.c
@@ -128,20 +128,57 @@ grpc_mdelem *grpc_compression_encoding_mdelem(
 /* TODO(dgq): Add the ability to specify parameters to the individual
  * compression algorithms */
 grpc_compression_algorithm grpc_compression_algorithm_for_level(
-    grpc_compression_level level) {
+    grpc_compression_level level, uint32_t accepted_encodings) {
   GRPC_API_TRACE("grpc_compression_algorithm_for_level(level=%d)", 1,
                  ((int)level));
+  if (level > GRPC_COMPRESS_LEVEL_HIGH) {
+    gpr_log(GPR_ERROR, "Unknown compression level %d.", (int)level);
+    abort();
+  }
+
+  const size_t num_supported =
+      GPR_BITCOUNT(accepted_encodings) - 1; /* discard NONE */
+  if (level == GRPC_COMPRESS_LEVEL_NONE || num_supported == 0) {
+    return GRPC_COMPRESS_NONE;
+  }
+
+  GPR_ASSERT(level > 0);
+
+  /* Establish a "ranking" or compression algorithms in increasing order of
+   * compression.
+   * This is simplistic and we will probably want to introduce other dimensions
+   * in the future (cpu/memory cost, etc). */
+  const grpc_compression_algorithm algos_ranking[] = {GRPC_COMPRESS_GZIP,
+                                                      GRPC_COMPRESS_DEFLATE};
+
+  /* intersect algos_ranking with the supported ones keeping the ranked order */
+  grpc_compression_algorithm
+      sorted_supported_algos[GRPC_COMPRESS_ALGORITHMS_COUNT];
+  size_t algos_supported_idx = 0;
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(algos_ranking); i++) {
+    const grpc_compression_algorithm alg = algos_ranking[i];
+    for (size_t j = 0; j < num_supported; j++) {
+      if (GPR_BITGET(accepted_encodings, alg) == 1) {
+        /* if \a alg in supported */
+        sorted_supported_algos[algos_supported_idx++] = alg;
+        break;
+      }
+    }
+    if (algos_supported_idx == num_supported) break;
+  }
+
   switch (level) {
     case GRPC_COMPRESS_LEVEL_NONE:
-      return GRPC_COMPRESS_NONE;
+      abort(); /* should have been handled already */
     case GRPC_COMPRESS_LEVEL_LOW:
+      return sorted_supported_algos[0];
     case GRPC_COMPRESS_LEVEL_MED:
+      return sorted_supported_algos[num_supported / 2];
     case GRPC_COMPRESS_LEVEL_HIGH:
-      return GRPC_COMPRESS_DEFLATE;
+      return sorted_supported_algos[num_supported - 1];
     default:
-      gpr_log(GPR_ERROR, "Unknown compression level %d.", (int)level);
       abort();
-  }
+  };
 }
 
 void grpc_compression_options_init(grpc_compression_options *opts) {
diff --git a/src/core/compression/message_compress.h b/src/core/compression/message_compress.h
index 14652004b860074bc3011057d57ea48076a0213d..20b78c063b34af0c8470e6745772ba28ed2b204a 100644
--- a/src/core/compression/message_compress.h
+++ b/src/core/compression/message_compress.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_COMPRESSION_MESSAGE_COMPRESS_H
-#define GRPC_INTERNAL_CORE_COMPRESSION_MESSAGE_COMPRESS_H
+#ifndef GRPC_CORE_COMPRESSION_MESSAGE_COMPRESS_H
+#define GRPC_CORE_COMPRESSION_MESSAGE_COMPRESS_H
 
 #include <grpc/compression.h>
 #include <grpc/support/slice_buffer.h>
@@ -49,4 +49,4 @@ int grpc_msg_compress(grpc_compression_algorithm algorithm,
 int grpc_msg_decompress(grpc_compression_algorithm algorithm,
                         gpr_slice_buffer* input, gpr_slice_buffer* output);
 
-#endif /* GRPC_INTERNAL_CORE_COMPRESSION_MESSAGE_COMPRESS_H */
+#endif /* GRPC_CORE_COMPRESSION_MESSAGE_COMPRESS_H */
diff --git a/src/core/debug/trace.h b/src/core/debug/trace.h
index dc5875976e2595b84ceab5823055872852ead19f..91ec14052e96404f2186cc8cc72bf8eca4eba247 100644
--- a/src/core/debug/trace.h
+++ b/src/core/debug/trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_DEBUG_TRACE_H
-#define GRPC_INTERNAL_CORE_DEBUG_TRACE_H
+#ifndef GRPC_CORE_DEBUG_TRACE_H
+#define GRPC_CORE_DEBUG_TRACE_H
 
 #include <grpc/support/port_platform.h>
 
@@ -40,4 +40,4 @@ void grpc_register_tracer(const char *name, int *flag);
 void grpc_tracer_init(const char *env_var_name);
 void grpc_tracer_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_DEBUG_TRACE_H */
+#endif /* GRPC_CORE_DEBUG_TRACE_H */
diff --git a/src/core/httpcli/format_request.c b/src/core/http/format_request.c
similarity index 89%
rename from src/core/httpcli/format_request.c
rename to src/core/http/format_request.c
index 04f2a2d99a7a3c81ac3b19d6b4af962a516c3265..60179297bf2663c48e7e19f5c47267603b3c8531 100644
--- a/src/core/httpcli/format_request.c
+++ b/src/core/http/format_request.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/format_request.h"
+#include "src/core/http/format_request.h"
 
 #include <stdarg.h>
 #include <stdio.h>
@@ -46,7 +46,7 @@
 static void fill_common_header(const grpc_httpcli_request *request,
                                gpr_strvec *buf) {
   size_t i;
-  gpr_strvec_add(buf, gpr_strdup(request->path));
+  gpr_strvec_add(buf, gpr_strdup(request->http.path));
   gpr_strvec_add(buf, gpr_strdup(" HTTP/1.0\r\n"));
   /* just in case some crazy server really expects HTTP/1.1 */
   gpr_strvec_add(buf, gpr_strdup("Host: "));
@@ -56,10 +56,10 @@ static void fill_common_header(const grpc_httpcli_request *request,
   gpr_strvec_add(buf,
                  gpr_strdup("User-Agent: " GRPC_HTTPCLI_USER_AGENT "\r\n"));
   /* user supplied headers */
-  for (i = 0; i < request->hdr_count; i++) {
-    gpr_strvec_add(buf, gpr_strdup(request->hdrs[i].key));
+  for (i = 0; i < request->http.hdr_count; i++) {
+    gpr_strvec_add(buf, gpr_strdup(request->http.hdrs[i].key));
     gpr_strvec_add(buf, gpr_strdup(": "));
-    gpr_strvec_add(buf, gpr_strdup(request->hdrs[i].value));
+    gpr_strvec_add(buf, gpr_strdup(request->http.hdrs[i].value));
     gpr_strvec_add(buf, gpr_strdup("\r\n"));
   }
 }
@@ -94,8 +94,8 @@ gpr_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
   fill_common_header(request, &out);
   if (body_bytes) {
     uint8_t has_content_type = 0;
-    for (i = 0; i < request->hdr_count; i++) {
-      if (strcmp(request->hdrs[i].key, "Content-Type") == 0) {
+    for (i = 0; i < request->http.hdr_count; i++) {
+      if (strcmp(request->http.hdrs[i].key, "Content-Type") == 0) {
         has_content_type = 1;
         break;
       }
diff --git a/src/core/httpcli/format_request.h b/src/core/http/format_request.h
similarity index 89%
rename from src/core/httpcli/format_request.h
rename to src/core/http/format_request.h
index c8dc8f7d4ee06f0553d80ae24df35c41720f92bd..49593b695c15b360fbd8d071d83680bc8c05eb74 100644
--- a/src/core/httpcli/format_request.h
+++ b/src/core/http/format_request.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,10 +31,10 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_HTTPCLI_FORMAT_REQUEST_H
-#define GRPC_INTERNAL_CORE_HTTPCLI_FORMAT_REQUEST_H
+#ifndef GRPC_CORE_HTTP_FORMAT_REQUEST_H
+#define GRPC_CORE_HTTP_FORMAT_REQUEST_H
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include <grpc/support/slice.h>
 
 gpr_slice grpc_httpcli_format_get_request(const grpc_httpcli_request *request);
@@ -42,4 +42,4 @@ gpr_slice grpc_httpcli_format_post_request(const grpc_httpcli_request *request,
                                            const char *body_bytes,
                                            size_t body_size);
 
-#endif /* GRPC_INTERNAL_CORE_HTTPCLI_FORMAT_REQUEST_H */
+#endif /* GRPC_CORE_HTTP_FORMAT_REQUEST_H */
diff --git a/src/core/httpcli/httpcli.c b/src/core/http/httpcli.c
similarity index 93%
rename from src/core/httpcli/httpcli.c
rename to src/core/http/httpcli.c
index 1219c444c715ce99aebf82944c84cce3ba85df4d..1c0d3336eae80ee6c4b5883a1795ab8b9af5bdfa 100644
--- a/src/core/httpcli/httpcli.c
+++ b/src/core/http/httpcli.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/iomgr/sockaddr.h"
 
 #include <string.h>
@@ -40,8 +40,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
-#include "src/core/httpcli/format_request.h"
-#include "src/core/httpcli/parser.h"
+#include "src/core/http/format_request.h"
+#include "src/core/http/parser.h"
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/resolve_address.h"
@@ -50,7 +50,7 @@
 
 typedef struct {
   gpr_slice request_text;
-  grpc_httpcli_parser parser;
+  grpc_http_parser parser;
   grpc_resolved_addresses *addresses;
   size_t next_address;
   grpc_endpoint *ep;
@@ -99,8 +99,9 @@ static void finish(grpc_exec_ctx *exec_ctx, internal_request *req,
                    int success) {
   grpc_pollset_set_del_pollset(exec_ctx, req->context->pollset_set,
                                req->pollset);
-  req->on_response(exec_ctx, req->user_data, success ? &req->parser.r : NULL);
-  grpc_httpcli_parser_destroy(&req->parser);
+  req->on_response(exec_ctx, req->user_data,
+                   success ? &req->parser.http.response : NULL);
+  grpc_http_parser_destroy(&req->parser);
   if (req->addresses != NULL) {
     grpc_resolved_addresses_destroy(req->addresses);
   }
@@ -129,7 +130,7 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   for (i = 0; i < req->incoming.count; i++) {
     if (GPR_SLICE_LENGTH(req->incoming.slices[i])) {
       req->have_read_byte = 1;
-      if (!grpc_httpcli_parser_parse(&req->parser, req->incoming.slices[i])) {
+      if (!grpc_http_parser_parse(&req->parser, req->incoming.slices[i])) {
         finish(exec_ctx, req, 0);
         return;
       }
@@ -141,7 +142,11 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *user_data, bool success) {
   } else if (!req->have_read_byte) {
     next_address(exec_ctx, req);
   } else {
-    finish(exec_ctx, req, grpc_httpcli_parser_eof(&req->parser));
+    int parse_success = grpc_http_parser_eof(&req->parser);
+    if (parse_success && (req->parser.type != GRPC_HTTP_RESPONSE)) {
+      parse_success = 0;
+    }
+    finish(exec_ctx, req, parse_success);
   }
 }
 
@@ -223,7 +228,7 @@ static void internal_request_begin(
   internal_request *req = gpr_malloc(sizeof(internal_request));
   memset(req, 0, sizeof(*req));
   req->request_text = request_text;
-  grpc_httpcli_parser_init(&req->parser);
+  grpc_http_parser_init(&req->parser);
   req->on_response = on_response;
   req->user_data = user_data;
   req->deadline = deadline;
@@ -255,7 +260,7 @@ void grpc_httpcli_get(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
       g_get_override(exec_ctx, request, deadline, on_response, user_data)) {
     return;
   }
-  gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->path);
+  gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->http.path);
   internal_request_begin(exec_ctx, context, pollset, request, deadline,
                          on_response, user_data, name,
                          grpc_httpcli_format_get_request(request));
@@ -274,7 +279,7 @@ void grpc_httpcli_post(grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
                       on_response, user_data)) {
     return;
   }
-  gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->path);
+  gpr_asprintf(&name, "HTTP:POST:%s:%s", request->host, request->http.path);
   internal_request_begin(
       exec_ctx, context, pollset, request, deadline, on_response, user_data,
       name, grpc_httpcli_format_post_request(request, body_bytes, body_size));
diff --git a/src/core/httpcli/httpcli.h b/src/core/http/httpcli.h
similarity index 85%
rename from src/core/httpcli/httpcli.h
rename to src/core/http/httpcli.h
index c9cd987c794f505dd8258a3af74a00dbad2e10aa..0bf4f2f44559ad853f7d3ce758c3c75dc28b7c97 100644
--- a/src/core/httpcli/httpcli.h
+++ b/src/core/http/httpcli.h
@@ -31,27 +31,20 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_HTTPCLI_HTTPCLI_H
-#define GRPC_INTERNAL_CORE_HTTPCLI_HTTPCLI_H
+#ifndef GRPC_CORE_HTTP_HTTPCLI_H
+#define GRPC_CORE_HTTP_HTTPCLI_H
 
 #include <stddef.h>
 
 #include <grpc/support/time.h>
 
+#include "src/core/http/parser.h"
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/pollset_set.h"
 
 /* User agent this library reports */
 #define GRPC_HTTPCLI_USER_AGENT "grpc-httpcli/0.0"
-/* Maximum length of a header string of the form 'Key: Value\r\n' */
-#define GRPC_HTTPCLI_MAX_HEADER_LENGTH 4096
-
-/* A single header to be passed in a request */
-typedef struct grpc_httpcli_header {
-  char *key;
-  char *value;
-} grpc_httpcli_header;
 
 /* Tracks in-progress http requests
    TODO(ctiller): allow caching and capturing multiple requests for the
@@ -77,33 +70,21 @@ typedef struct grpc_httpcli_request {
   char *host;
   /* The host to verify in the SSL handshake (or NULL) */
   char *ssl_host_override;
-  /* The path of the resource to fetch */
-  char *path;
-  /* Additional headers: count and key/values; the following are supplied
-     automatically and MUST NOT be set here:
+  /* The main part of the request
+     The following headers are supplied automatically and MUST NOT be set here:
      Host, Connection, User-Agent */
-  size_t hdr_count;
-  grpc_httpcli_header *hdrs;
+  grpc_http_request http;
   /* handshaker to use ssl for the request */
   const grpc_httpcli_handshaker *handshaker;
 } grpc_httpcli_request;
 
-/* A response */
-typedef struct grpc_httpcli_response {
-  /* HTTP status code */
-  int status;
-  /* Headers: count and key/values */
-  size_t hdr_count;
-  grpc_httpcli_header *hdrs;
-  /* Body: length and contents; contents are NOT null-terminated */
-  size_t body_length;
-  char *body;
-} grpc_httpcli_response;
+/* Expose the parser response type as a httpcli response too */
+typedef struct grpc_http_response grpc_httpcli_response;
 
 /* Callback for grpc_httpcli_get and grpc_httpcli_post. */
 typedef void (*grpc_httpcli_response_cb)(grpc_exec_ctx *exec_ctx,
                                          void *user_data,
-                                         const grpc_httpcli_response *response);
+                                         const grpc_http_response *response);
 
 void grpc_httpcli_context_init(grpc_httpcli_context *context);
 void grpc_httpcli_context_destroy(grpc_httpcli_context *context);
@@ -160,4 +141,4 @@ typedef int (*grpc_httpcli_post_override)(
 void grpc_httpcli_set_override(grpc_httpcli_get_override get,
                                grpc_httpcli_post_override post);
 
-#endif /* GRPC_INTERNAL_CORE_HTTPCLI_HTTPCLI_H */
+#endif /* GRPC_CORE_HTTP_HTTPCLI_H */
diff --git a/src/core/httpcli/httpcli_security_connector.c b/src/core/http/httpcli_security_connector.c
similarity index 99%
rename from src/core/httpcli/httpcli_security_connector.c
rename to src/core/http/httpcli_security_connector.c
index 156961a377a5abced49e4d7e8dead5b8b1a857af..ce827010897e5a39323aaa8e09694d2515a69beb 100644
--- a/src/core/httpcli/httpcli_security_connector.c
+++ b/src/core/http/httpcli_security_connector.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 
 #include <string.h>
 
diff --git a/src/core/http/parser.c b/src/core/http/parser.c
new file mode 100644
index 0000000000000000000000000000000000000000..ebec8a5157f3553b43377f2a51da6ea90fc146ee
--- /dev/null
+++ b/src/core/http/parser.c
@@ -0,0 +1,313 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/http/parser.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/useful.h>
+
+static char *buf2str(void *buffer, size_t length) {
+  char *out = gpr_malloc(length + 1);
+  memcpy(out, buffer, length);
+  out[length] = 0;
+  return out;
+}
+
+static int handle_response_line(grpc_http_parser *parser) {
+  uint8_t *beg = parser->cur_line;
+  uint8_t *cur = beg;
+  uint8_t *end = beg + parser->cur_line_length;
+
+  if (cur == end || *cur++ != 'H') goto error;
+  if (cur == end || *cur++ != 'T') goto error;
+  if (cur == end || *cur++ != 'T') goto error;
+  if (cur == end || *cur++ != 'P') goto error;
+  if (cur == end || *cur++ != '/') goto error;
+  if (cur == end || *cur++ != '1') goto error;
+  if (cur == end || *cur++ != '.') goto error;
+  if (cur == end || *cur < '0' || *cur++ > '1') goto error;
+  if (cur == end || *cur++ != ' ') goto error;
+  if (cur == end || *cur < '1' || *cur++ > '9') goto error;
+  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
+  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
+  parser->http.response.status =
+      (cur[-3] - '0') * 100 + (cur[-2] - '0') * 10 + (cur[-1] - '0');
+  if (cur == end || *cur++ != ' ') goto error;
+
+  /* we don't really care about the status code message */
+
+  return 1;
+
+error:
+  gpr_log(GPR_ERROR, "Failed parsing response line");
+  return 0;
+}
+
+static int handle_request_line(grpc_http_parser *parser) {
+  uint8_t *beg = parser->cur_line;
+  uint8_t *cur = beg;
+  uint8_t *end = beg + parser->cur_line_length;
+  uint8_t vers_major = 0;
+  uint8_t vers_minor = 0;
+
+  while (cur != end && *cur++ != ' ')
+    ;
+  if (cur == end) goto error;
+  parser->http.request.method = buf2str(beg, (size_t)(cur - beg - 1));
+
+  beg = cur;
+  while (cur != end && *cur++ != ' ')
+    ;
+  if (cur == end) goto error;
+  parser->http.request.path = buf2str(beg, (size_t)(cur - beg - 1));
+
+  if (cur == end || *cur++ != 'H') goto error;
+  if (cur == end || *cur++ != 'T') goto error;
+  if (cur == end || *cur++ != 'T') goto error;
+  if (cur == end || *cur++ != 'P') goto error;
+  if (cur == end || *cur++ != '/') goto error;
+  vers_major = (uint8_t)(*cur++ - '1' + 1);
+  ++cur;
+  if (cur == end) goto error;
+  vers_minor = (uint8_t)(*cur++ - '1' + 1);
+
+  if (vers_major == 1) {
+    if (vers_minor == 0) {
+      parser->http.request.version = GRPC_HTTP_HTTP10;
+    } else if (vers_minor == 1) {
+      parser->http.request.version = GRPC_HTTP_HTTP11;
+    } else {
+      goto error;
+    }
+  } else if (vers_major == 2) {
+    if (vers_minor == 0) {
+      parser->http.request.version = GRPC_HTTP_HTTP20;
+    } else {
+      goto error;
+    }
+  } else {
+    goto error;
+  }
+
+  return 1;
+
+error:
+  gpr_log(GPR_ERROR, "Failed parsing request line");
+  return 0;
+}
+
+static int handle_first_line(grpc_http_parser *parser) {
+  if (parser->cur_line[0] == 'H') {
+    parser->type = GRPC_HTTP_RESPONSE;
+    return handle_response_line(parser);
+  } else {
+    parser->type = GRPC_HTTP_REQUEST;
+    return handle_request_line(parser);
+  }
+}
+
+static int add_header(grpc_http_parser *parser) {
+  uint8_t *beg = parser->cur_line;
+  uint8_t *cur = beg;
+  uint8_t *end = beg + parser->cur_line_length;
+  size_t *hdr_count = NULL;
+  grpc_http_header **hdrs = NULL;
+  grpc_http_header hdr = {NULL, NULL};
+
+  GPR_ASSERT(cur != end);
+
+  if (*cur == ' ' || *cur == '\t') {
+    gpr_log(GPR_ERROR, "Continued header lines not supported yet");
+    goto error;
+  }
+
+  while (cur != end && *cur != ':') {
+    cur++;
+  }
+  if (cur == end) {
+    gpr_log(GPR_ERROR, "Didn't find ':' in header string");
+    goto error;
+  }
+  GPR_ASSERT(cur >= beg);
+  hdr.key = buf2str(beg, (size_t)(cur - beg));
+  cur++; /* skip : */
+
+  while (cur != end && (*cur == ' ' || *cur == '\t')) {
+    cur++;
+  }
+  GPR_ASSERT(end - cur >= 2);
+  hdr.value = buf2str(cur, (size_t)(end - cur) - 2);
+
+  if (parser->type == GRPC_HTTP_RESPONSE) {
+    hdr_count = &parser->http.response.hdr_count;
+    hdrs = &parser->http.response.hdrs;
+  } else if (parser->type == GRPC_HTTP_REQUEST) {
+    hdr_count = &parser->http.request.hdr_count;
+    hdrs = &parser->http.request.hdrs;
+  } else {
+    return 0;
+  }
+
+  if (*hdr_count == parser->hdr_capacity) {
+    parser->hdr_capacity =
+        GPR_MAX(parser->hdr_capacity + 1, parser->hdr_capacity * 3 / 2);
+    *hdrs = gpr_realloc(*hdrs, parser->hdr_capacity * sizeof(**hdrs));
+  }
+  (*hdrs)[(*hdr_count)++] = hdr;
+  return 1;
+
+error:
+  gpr_free(hdr.key);
+  gpr_free(hdr.value);
+  return 0;
+}
+
+static int finish_line(grpc_http_parser *parser) {
+  switch (parser->state) {
+    case GRPC_HTTP_FIRST_LINE:
+      if (!handle_first_line(parser)) {
+        return 0;
+      }
+      parser->state = GRPC_HTTP_HEADERS;
+      break;
+    case GRPC_HTTP_HEADERS:
+      if (parser->cur_line_length == 2) {
+        parser->state = GRPC_HTTP_BODY;
+        break;
+      }
+      if (!add_header(parser)) {
+        return 0;
+      }
+      break;
+    case GRPC_HTTP_BODY:
+      GPR_UNREACHABLE_CODE(return 0);
+  }
+
+  parser->cur_line_length = 0;
+  return 1;
+}
+
+static int addbyte_body(grpc_http_parser *parser, uint8_t byte) {
+  size_t *body_length = NULL;
+  char **body = NULL;
+
+  if (parser->type == GRPC_HTTP_RESPONSE) {
+    body_length = &parser->http.response.body_length;
+    body = &parser->http.response.body;
+  } else if (parser->type == GRPC_HTTP_REQUEST) {
+    body_length = &parser->http.request.body_length;
+    body = &parser->http.request.body;
+  } else {
+    return 0;
+  }
+
+  if (*body_length == parser->body_capacity) {
+    parser->body_capacity = GPR_MAX(8, parser->body_capacity * 3 / 2);
+    *body = gpr_realloc((void *)*body, parser->body_capacity);
+  }
+  (*body)[*body_length] = (char)byte;
+  (*body_length)++;
+
+  return 1;
+}
+
+static int addbyte(grpc_http_parser *parser, uint8_t byte) {
+  switch (parser->state) {
+    case GRPC_HTTP_FIRST_LINE:
+    case GRPC_HTTP_HEADERS:
+      if (parser->cur_line_length >= GRPC_HTTP_PARSER_MAX_HEADER_LENGTH) {
+        gpr_log(GPR_ERROR, "HTTP client max line length (%d) exceeded",
+                GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
+        return 0;
+      }
+      parser->cur_line[parser->cur_line_length] = byte;
+      parser->cur_line_length++;
+      if (parser->cur_line_length >= 2 &&
+          parser->cur_line[parser->cur_line_length - 2] == '\r' &&
+          parser->cur_line[parser->cur_line_length - 1] == '\n') {
+        return finish_line(parser);
+      } else {
+        return 1;
+      }
+      GPR_UNREACHABLE_CODE(return 0);
+    case GRPC_HTTP_BODY:
+      return addbyte_body(parser, byte);
+  }
+  GPR_UNREACHABLE_CODE(return 0);
+}
+
+void grpc_http_parser_init(grpc_http_parser *parser) {
+  memset(parser, 0, sizeof(*parser));
+  parser->state = GRPC_HTTP_FIRST_LINE;
+  parser->type = GRPC_HTTP_UNKNOWN;
+}
+
+void grpc_http_parser_destroy(grpc_http_parser *parser) {
+  size_t i;
+  if (parser->type == GRPC_HTTP_RESPONSE) {
+    gpr_free(parser->http.response.body);
+    for (i = 0; i < parser->http.response.hdr_count; i++) {
+      gpr_free(parser->http.response.hdrs[i].key);
+      gpr_free(parser->http.response.hdrs[i].value);
+    }
+    gpr_free(parser->http.response.hdrs);
+  } else if (parser->type == GRPC_HTTP_REQUEST) {
+    gpr_free(parser->http.request.body);
+    for (i = 0; i < parser->http.request.hdr_count; i++) {
+      gpr_free(parser->http.request.hdrs[i].key);
+      gpr_free(parser->http.request.hdrs[i].value);
+    }
+    gpr_free(parser->http.request.hdrs);
+    gpr_free(parser->http.request.method);
+    gpr_free(parser->http.request.path);
+  }
+}
+
+int grpc_http_parser_parse(grpc_http_parser *parser, gpr_slice slice) {
+  size_t i;
+
+  for (i = 0; i < GPR_SLICE_LENGTH(slice); i++) {
+    if (!addbyte(parser, GPR_SLICE_START_PTR(slice)[i])) {
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+int grpc_http_parser_eof(grpc_http_parser *parser) {
+  return parser->state == GRPC_HTTP_BODY;
+}
diff --git a/src/core/http/parser.h b/src/core/http/parser.h
new file mode 100644
index 0000000000000000000000000000000000000000..39517e485ae0d69ad4bc46189387517067314f15
--- /dev/null
+++ b/src/core/http/parser.h
@@ -0,0 +1,116 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_HTTP_PARSER_H
+#define GRPC_CORE_HTTP_PARSER_H
+
+#include <grpc/support/port_platform.h>
+#include <grpc/support/slice.h>
+
+/* Maximum length of a header string of the form 'Key: Value\r\n' */
+#define GRPC_HTTP_PARSER_MAX_HEADER_LENGTH 4096
+
+/* A single header to be passed in a request */
+typedef struct grpc_http_header {
+  char *key;
+  char *value;
+} grpc_http_header;
+
+typedef enum {
+  GRPC_HTTP_FIRST_LINE,
+  GRPC_HTTP_HEADERS,
+  GRPC_HTTP_BODY
+} grpc_http_parser_state;
+
+typedef enum {
+  GRPC_HTTP_HTTP10,
+  GRPC_HTTP_HTTP11,
+  GRPC_HTTP_HTTP20,
+} grpc_http_version;
+
+typedef enum {
+  GRPC_HTTP_RESPONSE,
+  GRPC_HTTP_REQUEST,
+  GRPC_HTTP_UNKNOWN
+} grpc_http_type;
+
+/* A request */
+typedef struct grpc_http_request {
+  /* Method of the request (e.g. GET, POST) */
+  char *method;
+  /* The path of the resource to fetch */
+  char *path;
+  /* HTTP version to use */
+  grpc_http_version version;
+  /* Headers attached to the request */
+  size_t hdr_count;
+  grpc_http_header *hdrs;
+  /* Body: length and contents; contents are NOT null-terminated */
+  size_t body_length;
+  char *body;
+} grpc_http_request;
+
+/* A response */
+typedef struct grpc_http_response {
+  /* HTTP status code */
+  int status;
+  /* Headers: count and key/values */
+  size_t hdr_count;
+  grpc_http_header *hdrs;
+  /* Body: length and contents; contents are NOT null-terminated */
+  size_t body_length;
+  char *body;
+} grpc_http_response;
+
+typedef struct {
+  grpc_http_parser_state state;
+  grpc_http_type type;
+
+  union {
+    grpc_http_response response;
+    grpc_http_request request;
+  } http;
+  size_t body_capacity;
+  size_t hdr_capacity;
+
+  uint8_t cur_line[GRPC_HTTP_PARSER_MAX_HEADER_LENGTH];
+  size_t cur_line_length;
+} grpc_http_parser;
+
+void grpc_http_parser_init(grpc_http_parser *parser);
+void grpc_http_parser_destroy(grpc_http_parser *parser);
+
+int grpc_http_parser_parse(grpc_http_parser *parser, gpr_slice slice);
+int grpc_http_parser_eof(grpc_http_parser *parser);
+
+#endif /* GRPC_CORE_HTTP_PARSER_H */
diff --git a/src/core/httpcli/parser.c b/src/core/httpcli/parser.c
deleted file mode 100644
index c314f025a001cc66c8dc5bf910102dc746c453a1..0000000000000000000000000000000000000000
--- a/src/core/httpcli/parser.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "src/core/httpcli/parser.h"
-
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/useful.h>
-
-static int handle_response_line(grpc_httpcli_parser *parser) {
-  uint8_t *beg = parser->cur_line;
-  uint8_t *cur = beg;
-  uint8_t *end = beg + parser->cur_line_length;
-
-  if (cur == end || *cur++ != 'H') goto error;
-  if (cur == end || *cur++ != 'T') goto error;
-  if (cur == end || *cur++ != 'T') goto error;
-  if (cur == end || *cur++ != 'P') goto error;
-  if (cur == end || *cur++ != '/') goto error;
-  if (cur == end || *cur++ != '1') goto error;
-  if (cur == end || *cur++ != '.') goto error;
-  if (cur == end || *cur < '0' || *cur++ > '1') goto error;
-  if (cur == end || *cur++ != ' ') goto error;
-  if (cur == end || *cur < '1' || *cur++ > '9') goto error;
-  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
-  if (cur == end || *cur < '0' || *cur++ > '9') goto error;
-  parser->r.status =
-      (cur[-3] - '0') * 100 + (cur[-2] - '0') * 10 + (cur[-1] - '0');
-  if (cur == end || *cur++ != ' ') goto error;
-
-  /* we don't really care about the status code message */
-
-  return 1;
-
-error:
-  gpr_log(GPR_ERROR, "Failed parsing response line");
-  return 0;
-}
-
-static char *buf2str(void *buffer, size_t length) {
-  char *out = gpr_malloc(length + 1);
-  memcpy(out, buffer, length);
-  out[length] = 0;
-  return out;
-}
-
-static int add_header(grpc_httpcli_parser *parser) {
-  uint8_t *beg = parser->cur_line;
-  uint8_t *cur = beg;
-  uint8_t *end = beg + parser->cur_line_length;
-  grpc_httpcli_header hdr = {NULL, NULL};
-
-  GPR_ASSERT(cur != end);
-
-  if (*cur == ' ' || *cur == '\t') {
-    gpr_log(GPR_ERROR, "Continued header lines not supported yet");
-    goto error;
-  }
-
-  while (cur != end && *cur != ':') {
-    cur++;
-  }
-  if (cur == end) {
-    gpr_log(GPR_ERROR, "Didn't find ':' in header string");
-    goto error;
-  }
-  GPR_ASSERT(cur >= beg);
-  hdr.key = buf2str(beg, (size_t)(cur - beg));
-  cur++; /* skip : */
-
-  while (cur != end && (*cur == ' ' || *cur == '\t')) {
-    cur++;
-  }
-  GPR_ASSERT(end - cur >= 2);
-  hdr.value = buf2str(cur, (size_t)(end - cur) - 2);
-
-  if (parser->r.hdr_count == parser->hdr_capacity) {
-    parser->hdr_capacity =
-        GPR_MAX(parser->hdr_capacity + 1, parser->hdr_capacity * 3 / 2);
-    parser->r.hdrs = gpr_realloc(
-        parser->r.hdrs, parser->hdr_capacity * sizeof(*parser->r.hdrs));
-  }
-  parser->r.hdrs[parser->r.hdr_count++] = hdr;
-  return 1;
-
-error:
-  gpr_free(hdr.key);
-  gpr_free(hdr.value);
-  return 0;
-}
-
-static int finish_line(grpc_httpcli_parser *parser) {
-  switch (parser->state) {
-    case GRPC_HTTPCLI_INITIAL_RESPONSE:
-      if (!handle_response_line(parser)) {
-        return 0;
-      }
-      parser->state = GRPC_HTTPCLI_HEADERS;
-      break;
-    case GRPC_HTTPCLI_HEADERS:
-      if (parser->cur_line_length == 2) {
-        parser->state = GRPC_HTTPCLI_BODY;
-        break;
-      }
-      if (!add_header(parser)) {
-        return 0;
-      }
-      break;
-    case GRPC_HTTPCLI_BODY:
-      GPR_UNREACHABLE_CODE(return 0);
-  }
-
-  parser->cur_line_length = 0;
-  return 1;
-}
-
-static int addbyte(grpc_httpcli_parser *parser, uint8_t byte) {
-  switch (parser->state) {
-    case GRPC_HTTPCLI_INITIAL_RESPONSE:
-    case GRPC_HTTPCLI_HEADERS:
-      if (parser->cur_line_length >= GRPC_HTTPCLI_MAX_HEADER_LENGTH) {
-        gpr_log(GPR_ERROR, "HTTP client max line length (%d) exceeded",
-                GRPC_HTTPCLI_MAX_HEADER_LENGTH);
-        return 0;
-      }
-      parser->cur_line[parser->cur_line_length] = byte;
-      parser->cur_line_length++;
-      if (parser->cur_line_length >= 2 &&
-          parser->cur_line[parser->cur_line_length - 2] == '\r' &&
-          parser->cur_line[parser->cur_line_length - 1] == '\n') {
-        return finish_line(parser);
-      } else {
-        return 1;
-      }
-      GPR_UNREACHABLE_CODE(return 0);
-    case GRPC_HTTPCLI_BODY:
-      if (parser->r.body_length == parser->body_capacity) {
-        parser->body_capacity = GPR_MAX(8, parser->body_capacity * 3 / 2);
-        parser->r.body =
-            gpr_realloc((void *)parser->r.body, parser->body_capacity);
-      }
-      parser->r.body[parser->r.body_length] = (char)byte;
-      parser->r.body_length++;
-      return 1;
-  }
-  GPR_UNREACHABLE_CODE(return 0);
-}
-
-void grpc_httpcli_parser_init(grpc_httpcli_parser *parser) {
-  memset(parser, 0, sizeof(*parser));
-  parser->state = GRPC_HTTPCLI_INITIAL_RESPONSE;
-  parser->r.status = 500;
-}
-
-void grpc_httpcli_parser_destroy(grpc_httpcli_parser *parser) {
-  size_t i;
-  gpr_free(parser->r.body);
-  for (i = 0; i < parser->r.hdr_count; i++) {
-    gpr_free(parser->r.hdrs[i].key);
-    gpr_free(parser->r.hdrs[i].value);
-  }
-  gpr_free(parser->r.hdrs);
-}
-
-int grpc_httpcli_parser_parse(grpc_httpcli_parser *parser, gpr_slice slice) {
-  size_t i;
-
-  for (i = 0; i < GPR_SLICE_LENGTH(slice); i++) {
-    if (!addbyte(parser, GPR_SLICE_START_PTR(slice)[i])) {
-      return 0;
-    }
-  }
-
-  return 1;
-}
-
-int grpc_httpcli_parser_eof(grpc_httpcli_parser *parser) {
-  return parser->state == GRPC_HTTPCLI_BODY;
-}
diff --git a/src/core/iomgr/closure.h b/src/core/iomgr/closure.h
index ea96c19c71b235c3980872eb2c54bdbac238b8e2..d5e1f455b9ad7a6d4a1988d53c4c2baca3e21e29 100644
--- a/src/core/iomgr/closure.h
+++ b/src/core/iomgr/closure.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H
-#define GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H
+#ifndef GRPC_CORE_IOMGR_CLOSURE_H
+#define GRPC_CORE_IOMGR_CLOSURE_H
 
 #include <grpc/support/port_platform.h>
 #include <stdbool.h>
@@ -95,4 +95,4 @@ bool grpc_closure_list_empty(grpc_closure_list list);
 /** return the next pointer for a queued closure list */
 grpc_closure *grpc_closure_next(grpc_closure *closure);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_CLOSURE_H */
+#endif /* GRPC_CORE_IOMGR_CLOSURE_H */
diff --git a/src/core/iomgr/endpoint.h b/src/core/iomgr/endpoint.h
index cbdc947abbfdd062982ba82f68b56337fe577d14..788f3ac5bcd1553456426040bcd88c14a2434fe4 100644
--- a/src/core/iomgr/endpoint.h
+++ b/src/core/iomgr/endpoint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_H
-#define GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_H
+#ifndef GRPC_CORE_IOMGR_ENDPOINT_H
+#define GRPC_CORE_IOMGR_ENDPOINT_H
 
 #include "src/core/iomgr/pollset.h"
 #include "src/core/iomgr/pollset_set.h"
@@ -99,4 +99,4 @@ struct grpc_endpoint {
   const grpc_endpoint_vtable *vtable;
 };
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_H */
+#endif /* GRPC_CORE_IOMGR_ENDPOINT_H */
diff --git a/src/core/iomgr/endpoint_pair.h b/src/core/iomgr/endpoint_pair.h
index 095ec5fcc9fc3f75b3b7b42821c69541e47662ff..59015d8ffbe358d71a30ea2f35b1b80af0f1a292 100644
--- a/src/core/iomgr/endpoint_pair.h
+++ b/src/core/iomgr/endpoint_pair.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_PAIR_H
-#define GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_PAIR_H
+#ifndef GRPC_CORE_IOMGR_ENDPOINT_PAIR_H
+#define GRPC_CORE_IOMGR_ENDPOINT_PAIR_H
 
 #include "src/core/iomgr/endpoint.h"
 
@@ -44,4 +44,4 @@ typedef struct {
 grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
                                                    size_t read_slice_size);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_PAIR_H */
+#endif /* GRPC_CORE_IOMGR_ENDPOINT_PAIR_H */
diff --git a/src/core/iomgr/endpoint_pair_posix.c b/src/core/iomgr/endpoint_pair_posix.c
index 56f6f146fd34ad164f4d238bd127fe71939b3d24..f84b8441df86f2ecb6bd177042bea61e70243d50 100644
--- a/src/core/iomgr/endpoint_pair_posix.c
+++ b/src/core/iomgr/endpoint_pair_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,6 +37,7 @@
 
 #include "src/core/iomgr/endpoint_pair.h"
 #include "src/core/iomgr/socket_utils_posix.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 
 #include <errno.h>
 #include <fcntl.h>
@@ -52,7 +53,7 @@
 
 static void create_sockets(int sv[2]) {
   int flags;
-  GPR_ASSERT(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);
+  grpc_create_socketpair_if_unix(sv);
   flags = fcntl(sv[0], F_GETFL, 0);
   GPR_ASSERT(fcntl(sv[0], F_SETFL, flags | O_NONBLOCK) == 0);
   flags = fcntl(sv[1], F_GETFL, 0);
diff --git a/src/core/iomgr/exec_ctx.h b/src/core/iomgr/exec_ctx.h
index 1b627a5dcf8c50ee494f04938e220880e8692982..07b54a0ab81466e1d64ea578548f9b74d9d421a2 100644
--- a/src/core/iomgr/exec_ctx.h
+++ b/src/core/iomgr/exec_ctx.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_EXEC_CTX_H
-#define GRPC_INTERNAL_CORE_IOMGR_EXEC_CTX_H
+#ifndef GRPC_CORE_IOMGR_EXEC_CTX_H
+#define GRPC_CORE_IOMGR_EXEC_CTX_H
 
 #include "src/core/iomgr/closure.h"
 
@@ -95,4 +95,4 @@ void grpc_exec_ctx_enqueue_list(grpc_exec_ctx *exec_ctx,
 void grpc_exec_ctx_global_init(void);
 void grpc_exec_ctx_global_shutdown(void);
 
-#endif
+#endif /* GRPC_CORE_IOMGR_EXEC_CTX_H */
diff --git a/src/core/iomgr/executor.h b/src/core/iomgr/executor.h
index aac057ddf5fb9699826261c2ad951a5c9c0b7861..f66b3560e372f23cf17aeb4b9b7412fdc2b94a6c 100644
--- a/src/core/iomgr/executor.h
+++ b/src/core/iomgr/executor.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_EXECUTOR_H
-#define GRPC_INTERNAL_CORE_IOMGR_EXECUTOR_H
+#ifndef GRPC_CORE_IOMGR_EXECUTOR_H
+#define GRPC_CORE_IOMGR_EXECUTOR_H
 
 #include "src/core/iomgr/closure.h"
 
@@ -50,4 +50,4 @@ void grpc_executor_enqueue(grpc_closure *closure, bool success);
 /** Shutdown the executor, running all pending work as part of the call */
 void grpc_executor_shutdown();
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_EXECUTOR_H */
+#endif /* GRPC_CORE_IOMGR_EXECUTOR_H */
diff --git a/src/core/iomgr/fd_posix.c b/src/core/iomgr/fd_posix.c
index 4ba7c5df9435a9ea3af3c95819fc9228a287a584..b4d038a3a1a7e25080cd7de54daf008350a4253b 100644
--- a/src/core/iomgr/fd_posix.c
+++ b/src/core/iomgr/fd_posix.c
@@ -92,7 +92,7 @@ static grpc_fd *alloc_fd(int fd) {
     gpr_mu_init(&r->mu);
   }
 
-  gpr_atm_rel_store(&r->refst, 1);
+  gpr_mu_lock(&r->mu);
   r->shutdown = 0;
   r->read_closure = CLOSURE_NOT_READY;
   r->write_closure = CLOSURE_NOT_READY;
@@ -104,6 +104,9 @@ static grpc_fd *alloc_fd(int fd) {
   r->on_done_closure = NULL;
   r->closed = 0;
   r->released = 0;
+  gpr_atm_rel_store(&r->refst, 1);
+  gpr_mu_unlock(&r->mu);
+
   return r;
 }
 
diff --git a/src/core/iomgr/fd_posix.h b/src/core/iomgr/fd_posix.h
index 17e7de88ffaa64b476a6e24491e75cda276ce592..a5c8ff1d9acc78d922abcb64c789c3c120ab3eec 100644
--- a/src/core/iomgr/fd_posix.h
+++ b/src/core/iomgr/fd_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_FD_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_FD_POSIX_H
+#ifndef GRPC_CORE_IOMGR_FD_POSIX_H
+#define GRPC_CORE_IOMGR_FD_POSIX_H
 
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/pollset.h"
@@ -189,4 +189,4 @@ void grpc_fd_unref(grpc_fd *fd);
 void grpc_fd_global_init(void);
 void grpc_fd_global_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_FD_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_FD_POSIX_H */
diff --git a/src/core/iomgr/iocp_windows.h b/src/core/iomgr/iocp_windows.h
index 8b2b1aeb5c2a950c0e440a19f19040257cc78a3c..570b8925aa369e296ed5e2e0676406cdf862f5e8 100644
--- a/src/core/iomgr/iocp_windows.h
+++ b/src/core/iomgr/iocp_windows.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_IOCP_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_IOCP_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_IOCP_WINDOWS_H
+#define GRPC_CORE_IOMGR_IOCP_WINDOWS_H
 
 #include <grpc/support/sync.h>
 
@@ -60,4 +60,4 @@ void grpc_socket_notify_on_read(grpc_exec_ctx *exec_ctx,
                                 grpc_winsocket *winsocket,
                                 grpc_closure *closure);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_IOCP_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_IOCP_WINDOWS_H */
diff --git a/src/core/iomgr/iomgr.h b/src/core/iomgr/iomgr.h
index c9ea84c6050b97bbb8eb60a6011ded7280dcbe65..e1237a4533e36d5400acdc49b3ab8f29232a71d0 100644
--- a/src/core/iomgr/iomgr.h
+++ b/src/core/iomgr/iomgr.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_IOMGR_H
-#define GRPC_INTERNAL_CORE_IOMGR_IOMGR_H
+#ifndef GRPC_CORE_IOMGR_IOMGR_H
+#define GRPC_CORE_IOMGR_IOMGR_H
 
 /** Initializes the iomgr. */
 void grpc_iomgr_init(void);
@@ -40,4 +40,4 @@ void grpc_iomgr_init(void);
 /** Signals the intention to shutdown the iomgr. */
 void grpc_iomgr_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_IOMGR_H */
+#endif /* GRPC_CORE_IOMGR_IOMGR_H */
diff --git a/src/core/iomgr/iomgr_internal.h b/src/core/iomgr/iomgr_internal.h
index ac2c46ebe6230df3242f4a8a3cb04ba7b3cf7dbf..d06b068b1c13c96382060a76d0077916a2dec91e 100644
--- a/src/core/iomgr/iomgr_internal.h
+++ b/src/core/iomgr/iomgr_internal.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_IOMGR_INTERNAL_H
-#define GRPC_INTERNAL_CORE_IOMGR_IOMGR_INTERNAL_H
+#ifndef GRPC_CORE_IOMGR_IOMGR_INTERNAL_H
+#define GRPC_CORE_IOMGR_IOMGR_INTERNAL_H
 
 #include <stdbool.h>
 
@@ -59,4 +59,4 @@ void grpc_iomgr_platform_shutdown(void);
 
 bool grpc_iomgr_abort_on_leaks(void);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_IOMGR_INTERNAL_H */
+#endif /* GRPC_CORE_IOMGR_IOMGR_INTERNAL_H */
diff --git a/src/core/iomgr/iomgr_posix.h b/src/core/iomgr/iomgr_posix.h
index 068a5c6d7cf17a43f50595e25094e91f2bcd85ee..698fb6aee706d1407948e8962d4160ece0fc1e94 100644
--- a/src/core/iomgr/iomgr_posix.h
+++ b/src/core/iomgr/iomgr_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_IOMGR_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_IOMGR_POSIX_H
+#ifndef GRPC_CORE_IOMGR_IOMGR_POSIX_H
+#define GRPC_CORE_IOMGR_IOMGR_POSIX_H
 
 #include "src/core/iomgr/iomgr_internal.h"
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_IOMGR_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_IOMGR_POSIX_H */
diff --git a/src/core/iomgr/pollset.h b/src/core/iomgr/pollset.h
index ee1debfb719bc098ed2074b9825ca554108203cb..9500b1a73a906be876ef6eceaa75fff1fabf7842 100644
--- a/src/core/iomgr/pollset.h
+++ b/src/core/iomgr/pollset.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_H
+#define GRPC_CORE_IOMGR_POLLSET_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/sync.h>
@@ -91,4 +91,4 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
 void grpc_pollset_kick(grpc_pollset *pollset,
                        grpc_pollset_worker *specific_worker);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_H */
diff --git a/src/core/iomgr/pollset_posix.h b/src/core/iomgr/pollset_posix.h
index bbedb66b0076dbbeaf8a94dab07a5de90da5e931..e0cfc44395072e1dee32f05a4e7a5309532189b4 100644
--- a/src/core/iomgr/pollset_posix.h
+++ b/src/core/iomgr/pollset_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_POSIX_H
+#define GRPC_CORE_IOMGR_POLLSET_POSIX_H
 
 #include <poll.h>
 
@@ -150,4 +150,4 @@ typedef int (*grpc_poll_function_type)(struct pollfd *, nfds_t, int);
 extern grpc_poll_function_type grpc_poll_function;
 extern grpc_wakeup_fd grpc_global_wakeup_fd;
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_POSIX_H */
diff --git a/src/core/iomgr/pollset_set.h b/src/core/iomgr/pollset_set.h
index dddcd8313f220a63ba0c934b69f2fd53b1026e33..204c6259337bce86ad602814facdea7bcc6550a7 100644
--- a/src/core/iomgr/pollset_set.h
+++ b/src/core/iomgr/pollset_set.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_SET_H
+#define GRPC_CORE_IOMGR_POLLSET_SET_H
 
 #include "src/core/iomgr/pollset.h"
 
@@ -58,4 +58,4 @@ void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
                                       grpc_pollset_set *bag,
                                       grpc_pollset_set *item);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_SET_H */
diff --git a/src/core/iomgr/pollset_set_posix.h b/src/core/iomgr/pollset_set_posix.h
index 7d1aaf41817fe3845c1697f44cd1025492992691..80f487718e42310e7d34eada507a4464370959c7 100644
--- a/src/core/iomgr/pollset_set_posix.h
+++ b/src/core/iomgr/pollset_set_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_POSIX_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_SET_POSIX_H
+#define GRPC_CORE_IOMGR_POLLSET_SET_POSIX_H
 
 #include "src/core/iomgr/fd_posix.h"
 #include "src/core/iomgr/pollset_set.h"
@@ -42,4 +42,4 @@ void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
 void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
                              grpc_pollset_set *pollset_set, grpc_fd *fd);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_SET_POSIX_H */
diff --git a/src/core/iomgr/pollset_set_windows.h b/src/core/iomgr/pollset_set_windows.h
index 9661cd2c3987223efbbe44f0f5a0ff2abc4425c9..0f040fef82242765c4cee06c66f2c9e1fc6dcda8 100644
--- a/src/core/iomgr/pollset_set_windows.h
+++ b/src/core/iomgr/pollset_set_windows.h
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_SET_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_SET_WINDOWS_H
+#define GRPC_CORE_IOMGR_POLLSET_SET_WINDOWS_H
 
 #include "src/core/iomgr/pollset_set.h"
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_SET_WINDOWS_H */
diff --git a/src/core/iomgr/pollset_windows.h b/src/core/iomgr/pollset_windows.h
index dc0b7a4104bd8ada3c4d0301044465d1e3e204fc..f1d158592228aedded006e9615bc8ab220624f94 100644
--- a/src/core/iomgr/pollset_windows.h
+++ b/src/core/iomgr/pollset_windows.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_POLLSET_WINDOWS_H
+#define GRPC_CORE_IOMGR_POLLSET_WINDOWS_H
 
 #include <grpc/support/sync.h>
 
@@ -72,4 +72,4 @@ struct grpc_pollset {
   grpc_closure *on_shutdown;
 };
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_POLLSET_WINDOWS_H */
diff --git a/src/core/iomgr/resolve_address.h b/src/core/iomgr/resolve_address.h
index b059630457656bc5676335e7621c2591dcc8e8fc..aa0d7d194b83bdee7f8062bb3a6815cd6161defe 100644
--- a/src/core/iomgr/resolve_address.h
+++ b/src/core/iomgr/resolve_address.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H
-#define GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H
+#ifndef GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H
+#define GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H
 
 #include <stddef.h>
 #include "src/core/iomgr/exec_ctx.h"
@@ -69,4 +69,4 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addresses);
 extern grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
     const char *name, const char *default_port);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H */
+#endif /* GRPC_CORE_IOMGR_RESOLVE_ADDRESS_H */
diff --git a/src/core/iomgr/resolve_address_posix.c b/src/core/iomgr/resolve_address_posix.c
index a6c9893f2310bd1728e1b468646500532efec5fa..26b3aa8189c938f3340e92bdc68b11fdd766238b 100644
--- a/src/core/iomgr/resolve_address_posix.c
+++ b/src/core/iomgr/resolve_address_posix.c
@@ -39,7 +39,6 @@
 
 #include <string.h>
 #include <sys/types.h>
-#include <sys/un.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
@@ -51,6 +50,7 @@
 #include "src/core/iomgr/executor.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/sockaddr_utils.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/block_annotate.h"
 #include "src/core/support/string.h"
 
@@ -71,18 +71,10 @@ static grpc_resolved_addresses *blocking_resolve_address_impl(
   int s;
   size_t i;
   grpc_resolved_addresses *addrs = NULL;
-  struct sockaddr_un *un;
 
   if (name[0] == 'u' && name[1] == 'n' && name[2] == 'i' && name[3] == 'x' &&
       name[4] == ':' && name[5] != 0) {
-    addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
-    addrs->naddrs = 1;
-    addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address));
-    un = (struct sockaddr_un *)addrs->addrs->addr;
-    un->sun_family = AF_UNIX;
-    strcpy(un->sun_path, name + 5);
-    addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
-    return addrs;
+    return grpc_resolve_unix_domain_address(name + 5);
   }
 
   /* parse name, splitting it into host and port parts */
diff --git a/src/core/iomgr/sockaddr.h b/src/core/iomgr/sockaddr.h
index e41e1ec6b48ed8edb4faa62f957ccaafc120e956..68241bdd55dee4510a83cf60d71541748b3f7b70 100644
--- a/src/core/iomgr/sockaddr.h
+++ b/src/core/iomgr/sockaddr.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_H
+#ifndef GRPC_CORE_IOMGR_SOCKADDR_H
+#define GRPC_CORE_IOMGR_SOCKADDR_H
 
 #include <grpc/support/port_platform.h>
 
@@ -44,4 +44,4 @@
 #include "src/core/iomgr/sockaddr_posix.h"
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_H */
+#endif /* GRPC_CORE_IOMGR_SOCKADDR_H */
diff --git a/src/core/iomgr/sockaddr_posix.h b/src/core/iomgr/sockaddr_posix.h
index 388abb3306691526ecd732adad0bafaa0a9c7884..e4425ed7352219d5130ebd2608bbd3ed20b71ebd 100644
--- a/src/core/iomgr/sockaddr_posix.h
+++ b/src/core/iomgr/sockaddr_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_POSIX_H
+#ifndef GRPC_CORE_IOMGR_SOCKADDR_POSIX_H
+#define GRPC_CORE_IOMGR_SOCKADDR_POSIX_H
 
 #include <arpa/inet.h>
 #include <sys/socket.h>
@@ -41,4 +41,4 @@
 #include <netdb.h>
 #include <unistd.h>
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_SOCKADDR_POSIX_H */
diff --git a/src/core/iomgr/sockaddr_utils.c b/src/core/iomgr/sockaddr_utils.c
index 61006d7a7aab2c37e9ccfdd0ce31f2f443a31cff..a3c3a874c1094b9898013be9e3aba709fdd338d7 100644
--- a/src/core/iomgr/sockaddr_utils.c
+++ b/src/core/iomgr/sockaddr_utils.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,16 +36,13 @@
 #include <errno.h>
 #include <string.h>
 
-#ifdef GPR_POSIX_SOCKET
-#include <sys/un.h>
-#endif
-
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/string.h"
 
 static const uint8_t kV4MappedPrefix[] = {0, 0, 0, 0, 0,    0,
@@ -191,14 +188,9 @@ char *grpc_sockaddr_to_uri(const struct sockaddr *addr) {
       gpr_asprintf(&result, "ipv6:%s", temp);
       gpr_free(temp);
       return result;
-#ifdef GPR_POSIX_SOCKET
-    case AF_UNIX:
-      gpr_asprintf(&result, "unix:%s", ((struct sockaddr_un *)addr)->sun_path);
-      return result;
-#endif
+    default:
+      return grpc_sockaddr_to_uri_unix_if_possible(addr);
   }
-
-  return NULL;
 }
 
 int grpc_sockaddr_get_port(const struct sockaddr *addr) {
@@ -207,9 +199,10 @@ int grpc_sockaddr_get_port(const struct sockaddr *addr) {
       return ntohs(((struct sockaddr_in *)addr)->sin_port);
     case AF_INET6:
       return ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
-    case AF_UNIX:
-      return 1;
     default:
+      if (grpc_is_unix_socket(addr)) {
+        return 1;
+      }
       gpr_log(GPR_ERROR, "Unknown socket family %d in grpc_sockaddr_get_port",
               addr->sa_family);
       return 0;
diff --git a/src/core/iomgr/sockaddr_utils.h b/src/core/iomgr/sockaddr_utils.h
index 6f7a279900dff0af65508caface301a898cef550..43dc7a45eccfb7b655d644e3af68bb9b73345e03 100644
--- a/src/core/iomgr/sockaddr_utils.h
+++ b/src/core/iomgr/sockaddr_utils.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_UTILS_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_UTILS_H
+#ifndef GRPC_CORE_IOMGR_SOCKADDR_UTILS_H
+#define GRPC_CORE_IOMGR_SOCKADDR_UTILS_H
 
 #include "src/core/iomgr/sockaddr.h"
 
@@ -86,4 +86,4 @@ int grpc_sockaddr_to_string(char **out, const struct sockaddr *addr,
 
 char *grpc_sockaddr_to_uri(const struct sockaddr *addr);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_UTILS_H */
+#endif /* GRPC_CORE_IOMGR_SOCKADDR_UTILS_H */
diff --git a/src/core/iomgr/sockaddr_win32.h b/src/core/iomgr/sockaddr_win32.h
index 8e3946a7d847cec022d21882a1d5129406f49bef..7acb8f7f57fe41abb3be9be9ae3623c947de9f4e 100644
--- a/src/core/iomgr/sockaddr_win32.h
+++ b/src/core/iomgr/sockaddr_win32.h
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_WIN32_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_WIN32_H
+#ifndef GRPC_CORE_IOMGR_SOCKADDR_WIN32_H
+#define GRPC_CORE_IOMGR_SOCKADDR_WIN32_H
 
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <mswsock.h>
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKADDR_WIN32_H */
+#endif /* GRPC_CORE_IOMGR_SOCKADDR_WIN32_H */
diff --git a/src/core/iomgr/socket_utils_posix.h b/src/core/iomgr/socket_utils_posix.h
index d330d1986ebd546723922b3a81d681fe0f7e27aa..b01e28b6f2f35360110df640cf907daee2249986 100644
--- a/src/core/iomgr/socket_utils_posix.h
+++ b/src/core/iomgr/socket_utils_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKET_UTILS_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKET_UTILS_POSIX_H
+#ifndef GRPC_CORE_IOMGR_SOCKET_UTILS_POSIX_H
+#define GRPC_CORE_IOMGR_SOCKET_UTILS_POSIX_H
 
 #include <unistd.h>
 #include <sys/socket.h>
@@ -110,4 +110,4 @@ extern int grpc_forbid_dualstack_sockets_for_testing;
 int grpc_create_dualstack_socket(const struct sockaddr *addr, int type,
                                  int protocol, grpc_dualstack_mode *dsmode);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKET_UTILS_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_SOCKET_UTILS_POSIX_H */
diff --git a/src/core/iomgr/socket_windows.h b/src/core/iomgr/socket_windows.h
index dfbfabe1f934cd8bedf5498d805a91028b59501f..8e50e7a95322c988f85ce246600b064ceafbc6a7 100644
--- a/src/core/iomgr/socket_windows.h
+++ b/src/core/iomgr/socket_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_SOCKET_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_SOCKET_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_SOCKET_WINDOWS_H
+#define GRPC_CORE_IOMGR_SOCKET_WINDOWS_H
 
 #include <grpc/support/port_platform.h>
 #include <winsock2.h>
@@ -108,4 +108,4 @@ void grpc_winsocket_shutdown(grpc_winsocket *socket);
 /* Destroy a socket. Should only be called if there's no pending operation. */
 void grpc_winsocket_destroy(grpc_winsocket *socket);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_SOCKET_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_SOCKET_WINDOWS_H */
diff --git a/src/core/iomgr/tcp_client.h b/src/core/iomgr/tcp_client.h
index 5e18e71ca2fde8f67c93fec4bb6af96788722e6c..2e29833b7067cbd253bdf31eea45a3d66c1acf24 100644
--- a/src/core/iomgr/tcp_client.h
+++ b/src/core/iomgr/tcp_client.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TCP_CLIENT_H
-#define GRPC_INTERNAL_CORE_IOMGR_TCP_CLIENT_H
+#ifndef GRPC_CORE_IOMGR_TCP_CLIENT_H
+#define GRPC_CORE_IOMGR_TCP_CLIENT_H
 
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/iomgr/pollset_set.h"
@@ -50,4 +50,4 @@ void grpc_tcp_client_connect(grpc_exec_ctx *exec_ctx, grpc_closure *on_connect,
                              const struct sockaddr *addr, size_t addr_len,
                              gpr_timespec deadline);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TCP_CLIENT_H */
+#endif /* GRPC_CORE_IOMGR_TCP_CLIENT_H */
diff --git a/src/core/iomgr/tcp_client_posix.c b/src/core/iomgr/tcp_client_posix.c
index 15727856abf918f031bc5594ac11bba157618e8b..1d3f9b655586203159bbbffedd8f29e7fbf1b753 100644
--- a/src/core/iomgr/tcp_client_posix.c
+++ b/src/core/iomgr/tcp_client_posix.c
@@ -54,6 +54,7 @@
 #include "src/core/iomgr/socket_utils_posix.h"
 #include "src/core/iomgr/tcp_posix.h"
 #include "src/core/iomgr/timer.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/string.h"
 
 extern int grpc_tcp_trace;
@@ -77,13 +78,12 @@ static int prepare_socket(const struct sockaddr *addr, int fd) {
   }
 
   if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1) ||
-      (addr->sa_family != AF_UNIX && !grpc_set_socket_low_latency(fd, 1)) ||
+      (!grpc_is_unix_socket(addr) && !grpc_set_socket_low_latency(fd, 1)) ||
       !grpc_set_socket_no_sigpipe_if_possible(fd)) {
     gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
             strerror(errno));
     goto error;
   }
-
   return 1;
 
 error:
diff --git a/src/core/iomgr/tcp_posix.h b/src/core/iomgr/tcp_posix.h
index 2a40cdd38590b20f75464b4e3822949994ffa75e..d846ec570f05b161cf2767ac3d1803e5508a6b06 100644
--- a/src/core/iomgr/tcp_posix.h
+++ b/src/core/iomgr/tcp_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TCP_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_TCP_POSIX_H
+#ifndef GRPC_CORE_IOMGR_TCP_POSIX_H
+#define GRPC_CORE_IOMGR_TCP_POSIX_H
 /*
    Low level TCP "bottom half" implementation, for use by transports built on
    top of a TCP connection.
@@ -68,4 +68,4 @@ int grpc_tcp_fd(grpc_endpoint *ep);
 void grpc_tcp_destroy_and_release_fd(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
                                      int *fd, grpc_closure *done);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TCP_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_TCP_POSIX_H */
diff --git a/src/core/iomgr/tcp_server.h b/src/core/iomgr/tcp_server.h
index a39dd3bafce4a59cd2179a686b9e83510111a1b7..93247e9e4e3c4000014b01f73478d5a4c7a102ed 100644
--- a/src/core/iomgr/tcp_server.h
+++ b/src/core/iomgr/tcp_server.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TCP_SERVER_H
-#define GRPC_INTERNAL_CORE_IOMGR_TCP_SERVER_H
+#ifndef GRPC_CORE_IOMGR_TCP_SERVER_H
+#define GRPC_CORE_IOMGR_TCP_SERVER_H
 
 #include "src/core/iomgr/closure.h"
 #include "src/core/iomgr/endpoint.h"
@@ -100,4 +100,4 @@ void grpc_tcp_server_shutdown_starting_add(grpc_tcp_server *s,
    a call (exec_ctx!=NULL) to shutdown_complete. */
 void grpc_tcp_server_unref(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TCP_SERVER_H */
+#endif /* GRPC_CORE_IOMGR_TCP_SERVER_H */
diff --git a/src/core/iomgr/tcp_server_posix.c b/src/core/iomgr/tcp_server_posix.c
index 5e07f8261c223e4cd410ab2deab9e34cb0d99c2b..03dfddd925622c83124aa433a2fd8b7eb4b6708e 100644
--- a/src/core/iomgr/tcp_server_posix.c
+++ b/src/core/iomgr/tcp_server_posix.c
@@ -52,7 +52,6 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/un.h>
 #include <unistd.h>
 
 #include "src/core/iomgr/pollset_posix.h"
@@ -60,6 +59,7 @@
 #include "src/core/iomgr/sockaddr_utils.h"
 #include "src/core/iomgr/socket_utils_posix.h"
 #include "src/core/iomgr/tcp_posix.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -81,7 +81,6 @@ struct grpc_tcp_listener {
   union {
     uint8_t untyped[GRPC_MAX_SOCKADDR_SIZE];
     struct sockaddr sockaddr;
-    struct sockaddr_un un;
   } addr;
   size_t addr_len;
   int port;
@@ -98,14 +97,6 @@ struct grpc_tcp_listener {
   int is_sibling;
 };
 
-static void unlink_if_unix_domain_socket(const struct sockaddr_un *un) {
-  struct stat st;
-
-  if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
-    unlink(un->sun_path);
-  }
-}
-
 /* the overall server */
 struct grpc_tcp_server {
   gpr_refcount refs;
@@ -203,9 +194,7 @@ static void deactivated_all_ports(grpc_exec_ctx *exec_ctx, grpc_tcp_server *s) {
   if (s->head) {
     grpc_tcp_listener *sp;
     for (sp = s->head; sp; sp = sp->next) {
-      if (sp->addr.sockaddr.sa_family == AF_UNIX) {
-        unlink_if_unix_domain_socket(&sp->addr.un);
-      }
+      grpc_unlink_if_unix_domain_socket(&sp->addr.sockaddr);
       sp->destroyed_closure.cb = destroyed_port;
       sp->destroyed_closure.cb_arg = s;
       grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, NULL,
@@ -281,7 +270,7 @@ static int prepare_socket(int fd, const struct sockaddr *addr,
   }
 
   if (!grpc_set_socket_nonblocking(fd, 1) || !grpc_set_socket_cloexec(fd, 1) ||
-      (addr->sa_family != AF_UNIX && (!grpc_set_socket_low_latency(fd, 1) ||
+      (!grpc_is_unix_socket(addr) && (!grpc_set_socket_low_latency(fd, 1) ||
                                       !grpc_set_socket_reuse_addr(fd, 1))) ||
       !grpc_set_socket_no_sigpipe_if_possible(fd)) {
     gpr_log(GPR_ERROR, "Unable to configure socket %d: %s", fd,
@@ -451,9 +440,7 @@ int grpc_tcp_server_add_port(grpc_tcp_server *s, const void *addr,
   if (s->tail != NULL) {
     port_index = s->tail->port_index + 1;
   }
-  if (((struct sockaddr *)addr)->sa_family == AF_UNIX) {
-    unlink_if_unix_domain_socket(addr);
-  }
+  grpc_unlink_if_unix_domain_socket((struct sockaddr *)addr);
 
   /* Check if this is a wildcard port, and if so, try to keep the port the same
      as some previously created listener. */
diff --git a/src/core/iomgr/tcp_windows.h b/src/core/iomgr/tcp_windows.h
index deb3e48293c6b3b917b50ddbc9beacbfc06d290a..78bc13389adff7fccc099c4686a99174a071a33e 100644
--- a/src/core/iomgr/tcp_windows.h
+++ b/src/core/iomgr/tcp_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TCP_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_TCP_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_TCP_WINDOWS_H
+#define GRPC_CORE_IOMGR_TCP_WINDOWS_H
 /*
    Low level TCP "bottom half" implementation, for use by transports built on
    top of a TCP connection.
@@ -54,4 +54,4 @@ grpc_endpoint *grpc_tcp_create(grpc_winsocket *socket, char *peer_string);
 
 int grpc_tcp_prepare_socket(SOCKET sock);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TCP_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_TCP_WINDOWS_H */
diff --git a/src/core/iomgr/time_averaged_stats.h b/src/core/iomgr/time_averaged_stats.h
index 4e9e3956c28cdaa9c057b04808a241ccd2d3637c..048e244bcc1de14f9128867f4073aee4faa5fec0 100644
--- a/src/core/iomgr/time_averaged_stats.h
+++ b/src/core/iomgr/time_averaged_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TIME_AVERAGED_STATS_H
-#define GRPC_INTERNAL_CORE_IOMGR_TIME_AVERAGED_STATS_H
+#ifndef GRPC_CORE_IOMGR_TIME_AVERAGED_STATS_H
+#define GRPC_CORE_IOMGR_TIME_AVERAGED_STATS_H
 
 /* This tracks a time-decaying weighted average.  It works by collecting
    batches of samples and then mixing their average into a time-decaying
@@ -85,4 +85,4 @@ void grpc_time_averaged_stats_add_sample(grpc_time_averaged_stats* stats,
    value. */
 double grpc_time_averaged_stats_update_average(grpc_time_averaged_stats* stats);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TIME_AVERAGED_STATS_H */
+#endif /* GRPC_CORE_IOMGR_TIME_AVERAGED_STATS_H */
diff --git a/src/core/iomgr/timer.h b/src/core/iomgr/timer.h
index e239e884e7ba01bb13c56c33c174d02b51d42f32..63505df4273704704d6127e6f597864fc110425d 100644
--- a/src/core/iomgr/timer.h
+++ b/src/core/iomgr/timer.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TIMER_H
-#define GRPC_INTERNAL_CORE_IOMGR_TIMER_H
+#ifndef GRPC_CORE_IOMGR_TIMER_H
+#define GRPC_CORE_IOMGR_TIMER_H
 
 #include "src/core/iomgr/iomgr.h"
 #include "src/core/iomgr/exec_ctx.h"
@@ -105,4 +105,4 @@ void grpc_timer_list_shutdown(grpc_exec_ctx *exec_ctx);
 
 void grpc_kick_poller(void);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TIMER_H */
+#endif /* GRPC_CORE_IOMGR_TIMER_H */
diff --git a/src/core/iomgr/timer_heap.h b/src/core/iomgr/timer_heap.h
index 2d220f16774e7af149ca7c06471ede00eb8e5666..c2912ef45df1963beff0eb92408871e7b228aadb 100644
--- a/src/core/iomgr/timer_heap.h
+++ b/src/core/iomgr/timer_heap.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_TIMER_HEAP_H
-#define GRPC_INTERNAL_CORE_IOMGR_TIMER_HEAP_H
+#ifndef GRPC_CORE_IOMGR_TIMER_HEAP_H
+#define GRPC_CORE_IOMGR_TIMER_HEAP_H
 
 #include "src/core/iomgr/timer.h"
 
@@ -54,4 +54,4 @@ void grpc_timer_heap_pop(grpc_timer_heap *heap);
 
 int grpc_timer_heap_is_empty(grpc_timer_heap *heap);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_TIMER_HEAP_H */
+#endif /* GRPC_CORE_IOMGR_TIMER_HEAP_H */
diff --git a/src/core/iomgr/udp_server.c b/src/core/iomgr/udp_server.c
index ef548cfe4dba05f84bb8afc3dd26b43d7c14f54f..efedd9f32ec48ede02022d0fe0f3216a7b7b8a06 100644
--- a/src/core/iomgr/udp_server.c
+++ b/src/core/iomgr/udp_server.c
@@ -52,7 +52,6 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/un.h>
 #include <unistd.h>
 
 #include "src/core/iomgr/fd_posix.h"
@@ -60,6 +59,7 @@
 #include "src/core/iomgr/resolve_address.h"
 #include "src/core/iomgr/sockaddr_utils.h"
 #include "src/core/iomgr/socket_utils_posix.h"
+#include "src/core/iomgr/unix_sockets_posix.h"
 #include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
@@ -77,7 +77,6 @@ typedef struct {
   union {
     uint8_t untyped[GRPC_MAX_SOCKADDR_SIZE];
     struct sockaddr sockaddr;
-    struct sockaddr_un un;
   } addr;
   size_t addr_len;
   grpc_closure read_closure;
@@ -85,14 +84,6 @@ typedef struct {
   grpc_udp_server_read_cb read_cb;
 } server_port;
 
-static void unlink_if_unix_domain_socket(const struct sockaddr_un *un) {
-  struct stat st;
-
-  if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
-    unlink(un->sun_path);
-  }
-}
-
 /* the overall server */
 struct grpc_udp_server {
   gpr_mu mu;
@@ -176,9 +167,7 @@ static void deactivated_all_ports(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
   if (s->nports) {
     for (i = 0; i < s->nports; i++) {
       server_port *sp = &s->ports[i];
-      if (sp->addr.sockaddr.sa_family == AF_UNIX) {
-        unlink_if_unix_domain_socket(&sp->addr.un);
-      }
+      grpc_unlink_if_unix_domain_socket(&sp->addr.sockaddr);
       sp->destroyed_closure.cb = destroyed_port;
       sp->destroyed_closure.cb_arg = s;
       grpc_fd_orphan(exec_ctx, sp->emfd, &sp->destroyed_closure, NULL,
@@ -336,9 +325,7 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
   socklen_t sockname_len;
   int port;
 
-  if (((struct sockaddr *)addr)->sa_family == AF_UNIX) {
-    unlink_if_unix_domain_socket(addr);
-  }
+  grpc_unlink_if_unix_domain_socket((struct sockaddr *)addr);
 
   /* Check if this is a wildcard port, and if so, try to keep the port the same
      as some previously created listener. */
diff --git a/src/core/iomgr/udp_server.h b/src/core/iomgr/udp_server.h
index a9d0489edfd13b44cabfc11e7a111b6f7a01c26f..148c04fa9beb632e10c4a1f5181a9ce98b2d8855 100644
--- a/src/core/iomgr/udp_server.h
+++ b/src/core/iomgr/udp_server.h
@@ -31,21 +31,22 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_UDP_SERVER_H
-#define GRPC_INTERNAL_CORE_IOMGR_UDP_SERVER_H
+#ifndef GRPC_CORE_IOMGR_UDP_SERVER_H
+#define GRPC_CORE_IOMGR_UDP_SERVER_H
 
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/iomgr/fd_posix.h"
 
-/* Forward decl of grpc_server */
-typedef struct grpc_server grpc_server;
+/* Forward decl of struct grpc_server */
+/* This is not typedef'ed to avoid a typedef-redefinition error */
+struct grpc_server;
 
 /* Forward decl of grpc_udp_server */
 typedef struct grpc_udp_server grpc_udp_server;
 
 /* Called when data is available to read from the socket. */
 typedef void (*grpc_udp_server_read_cb)(grpc_exec_ctx *exec_ctx, grpc_fd *emfd,
-                                        grpc_server *server);
+                                        struct grpc_server *server);
 
 /* Create a server, initially not bound to any ports */
 grpc_udp_server *grpc_udp_server_create(void);
@@ -53,7 +54,7 @@ grpc_udp_server *grpc_udp_server_create(void);
 /* Start listening to bound ports */
 void grpc_udp_server_start(grpc_exec_ctx *exec_ctx, grpc_udp_server *udp_server,
                            grpc_pollset **pollsets, size_t pollset_count,
-                           grpc_server *server);
+                           struct grpc_server *server);
 
 int grpc_udp_server_get_fd(grpc_udp_server *s, unsigned index);
 
@@ -73,4 +74,4 @@ int grpc_udp_server_add_port(grpc_udp_server *s, const void *addr,
 void grpc_udp_server_destroy(grpc_exec_ctx *exec_ctx, grpc_udp_server *server,
                              grpc_closure *on_done);
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_UDP_SERVER_H */
+#endif /* GRPC_CORE_IOMGR_UDP_SERVER_H */
diff --git a/src/core/iomgr/unix_sockets_posix.c b/src/core/iomgr/unix_sockets_posix.c
new file mode 100644
index 0000000000000000000000000000000000000000..480ff613f6bce48919f44eaf43da7274936e3caf
--- /dev/null
+++ b/src/core/iomgr/unix_sockets_posix.c
@@ -0,0 +1,103 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/iomgr/unix_sockets_posix.h"
+
+#ifdef GPR_HAVE_UNIX_SOCKET
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+
+#include <grpc/support/alloc.h>
+
+void grpc_create_socketpair_if_unix(int sv[2]) {
+  GPR_ASSERT(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);
+}
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name) {
+  struct sockaddr_un *un;
+
+  grpc_resolved_addresses *addrs = gpr_malloc(sizeof(grpc_resolved_addresses));
+  addrs->naddrs = 1;
+  addrs->addrs = gpr_malloc(sizeof(grpc_resolved_address));
+  un = (struct sockaddr_un *)addrs->addrs->addr;
+  un->sun_family = AF_UNIX;
+  strcpy(un->sun_path, name);
+  addrs->addrs->len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
+  return addrs;
+}
+
+int grpc_is_unix_socket(const struct sockaddr *addr) {
+  return addr->sa_family == AF_UNIX;
+}
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr) {
+  if (addr->sa_family != AF_UNIX) {
+    return;
+  }
+  struct sockaddr_un *un = (struct sockaddr_un *)addr;
+  struct stat st;
+
+  if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
+    unlink(un->sun_path);
+  }
+}
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len) {
+  struct sockaddr_un *un = (struct sockaddr_un *)addr;
+
+  un->sun_family = AF_UNIX;
+  strcpy(un->sun_path, uri->path);
+  *len = strlen(un->sun_path) + sizeof(un->sun_family) + 1;
+
+  return 1;
+}
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+                                      grpc_uri *uri) {
+  return gpr_strdup("localhost");
+}
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr) {
+  if (addr->sa_family != AF_UNIX) {
+    return NULL;
+  }
+
+  char *result;
+  gpr_asprintf(&result, "unix:%s", ((struct sockaddr_un *)addr)->sun_path);
+  return result;
+}
+
+#endif
diff --git a/src/core/iomgr/unix_sockets_posix.h b/src/core/iomgr/unix_sockets_posix.h
new file mode 100644
index 0000000000000000000000000000000000000000..e842ba3770a0027d1f8b5555b7aa3c156a898de6
--- /dev/null
+++ b/src/core/iomgr/unix_sockets_posix.h
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_IOMGR_UNIX_SOCKETS_POSIX_H
+#define GRPC_CORE_IOMGR_UNIX_SOCKETS_POSIX_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/support/string_util.h>
+
+#include "src/core/client_config/resolver_factory.h"
+#include "src/core/client_config/uri_parser.h"
+#include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/sockaddr.h"
+
+void grpc_create_socketpair_if_unix(int sv[2]);
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name);
+
+int grpc_is_unix_socket(const struct sockaddr *addr);
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr);
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len);
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+                                      grpc_uri *uri);
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr);
+
+#endif /* GRPC_CORE_IOMGR_UNIX_SOCKETS_POSIX_H */
diff --git a/src/core/iomgr/unix_sockets_posix_noop.c b/src/core/iomgr/unix_sockets_posix_noop.c
new file mode 100644
index 0000000000000000000000000000000000000000..045467bea4fa51f84a898a605c027c29daa15243
--- /dev/null
+++ b/src/core/iomgr/unix_sockets_posix_noop.c
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/iomgr/unix_sockets_posix.h"
+
+#ifndef GPR_HAVE_UNIX_SOCKET
+
+void grpc_create_socketpair_if_unix(int sv[2]) {}
+
+grpc_resolved_addresses *grpc_resolve_unix_domain_address(const char *name) {
+  return NULL;
+}
+
+int grpc_is_unix_socket(const struct sockaddr *addr) { return false; }
+
+void grpc_unlink_if_unix_domain_socket(const struct sockaddr *addr) {}
+
+int grpc_parse_unix(grpc_uri *uri, struct sockaddr_storage *addr, size_t *len) {
+  return 0;
+}
+
+char *grpc_unix_get_default_authority(grpc_resolver_factory *factory,
+                                      grpc_uri *uri) {
+  return NULL;
+}
+
+char *grpc_sockaddr_to_uri_unix_if_possible(const struct sockaddr *addr) {
+  return NULL;
+}
+
+#endif
diff --git a/src/core/iomgr/wakeup_fd_pipe.c b/src/core/iomgr/wakeup_fd_pipe.c
index 80de181d9d1966e80c8aa20440fb164862a470b5..dd2fd1f05729fc0d13894f1bf6fa6941405c2690 100644
--- a/src/core/iomgr/wakeup_fd_pipe.c
+++ b/src/core/iomgr/wakeup_fd_pipe.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,13 +41,18 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "src/core/iomgr/socket_utils_posix.h"
 #include <grpc/support/log.h>
 
+#include "src/core/iomgr/socket_utils_posix.h"
+
 static void pipe_init(grpc_wakeup_fd* fd_info) {
   int pipefd[2];
   /* TODO(klempner): Make this nonfatal */
-  GPR_ASSERT(0 == pipe(pipefd));
+  int r = pipe(pipefd);
+  if (0 != r) {
+    gpr_log(GPR_ERROR, "pipe creation failed (%d): %s", errno, strerror(errno));
+    abort();
+  }
   GPR_ASSERT(grpc_set_socket_nonblocking(pipefd[0], 1));
   GPR_ASSERT(grpc_set_socket_nonblocking(pipefd[1], 1));
   fd_info->read_fd = pipefd[0];
diff --git a/src/core/iomgr/wakeup_fd_pipe.h b/src/core/iomgr/wakeup_fd_pipe.h
index 01a13a97c036e362e3f33791216f427bb56af388..eb3e02b482a86c6d8117e714abaf09ef81426e5a 100644
--- a/src/core/iomgr/wakeup_fd_pipe.h
+++ b/src/core/iomgr/wakeup_fd_pipe.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,11 +31,11 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_PIPE_H
-#define GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_PIPE_H
+#ifndef GRPC_CORE_IOMGR_WAKEUP_FD_PIPE_H
+#define GRPC_CORE_IOMGR_WAKEUP_FD_PIPE_H
 
 #include "src/core/iomgr/wakeup_fd_posix.h"
 
 extern grpc_wakeup_fd_vtable grpc_pipe_wakeup_fd_vtable;
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_PIPE_H */
+#endif /* GRPC_CORE_IOMGR_WAKEUP_FD_PIPE_H */
diff --git a/src/core/iomgr/wakeup_fd_posix.h b/src/core/iomgr/wakeup_fd_posix.h
index ffd60d1d4e68dcaee8d43a1e5dcfc085c446ed96..d7e3cf46733f9230aa5a6ff6e0e01baa7830e4b0 100644
--- a/src/core/iomgr/wakeup_fd_posix.h
+++ b/src/core/iomgr/wakeup_fd_posix.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,8 +59,8 @@
  * 2. If the polling thread was awakened by a wakeup_fd event, call
  *    grpc_wakeup_fd_consume_wakeup() on it.
  */
-#ifndef GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_POSIX_H
+#ifndef GRPC_CORE_IOMGR_WAKEUP_FD_POSIX_H
+#define GRPC_CORE_IOMGR_WAKEUP_FD_POSIX_H
 
 void grpc_wakeup_fd_global_init(void);
 void grpc_wakeup_fd_global_destroy(void);
@@ -98,4 +98,4 @@ void grpc_wakeup_fd_destroy(grpc_wakeup_fd* fd_info);
  * wakeup_fd_nospecial.c if no such implementation exists. */
 extern const grpc_wakeup_fd_vtable grpc_specialized_wakeup_fd_vtable;
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_WAKEUP_FD_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_WAKEUP_FD_POSIX_H */
diff --git a/src/core/iomgr/workqueue.h b/src/core/iomgr/workqueue.h
index 36dd133468328e6b533fdfb6c061b7f49662019f..2ba1e5d9a20e3c234556bf1a5dc051908ffcd1cd 100644
--- a/src/core/iomgr/workqueue.h
+++ b/src/core/iomgr/workqueue.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_H
-#define GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_H
+#ifndef GRPC_CORE_IOMGR_WORKQUEUE_H
+#define GRPC_CORE_IOMGR_WORKQUEUE_H
 
 #include "src/core/iomgr/iomgr.h"
 #include "src/core/iomgr/pollset.h"
@@ -80,4 +80,4 @@ void grpc_workqueue_add_to_pollset(grpc_exec_ctx *exec_ctx,
 void grpc_workqueue_push(grpc_workqueue *workqueue, grpc_closure *closure,
                          int success);
 
-#endif
+#endif /* GRPC_CORE_IOMGR_WORKQUEUE_H */
diff --git a/src/core/iomgr/workqueue_posix.h b/src/core/iomgr/workqueue_posix.h
index 68f195ee0d266892e0a39836e2cf4a30644761f6..89937b1ea812071c2f87c90a6adc2a1bb2a42ee3 100644
--- a/src/core/iomgr/workqueue_posix.h
+++ b/src/core/iomgr/workqueue_posix.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_POSIX_H
-#define GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_POSIX_H
+#ifndef GRPC_CORE_IOMGR_WORKQUEUE_POSIX_H
+#define GRPC_CORE_IOMGR_WORKQUEUE_POSIX_H
 
 #include "src/core/iomgr/wakeup_fd_posix.h"
 
@@ -50,4 +50,4 @@ struct grpc_workqueue {
   grpc_closure read_closure;
 };
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_POSIX_H */
+#endif /* GRPC_CORE_IOMGR_WORKQUEUE_POSIX_H */
diff --git a/src/core/iomgr/workqueue_windows.h b/src/core/iomgr/workqueue_windows.h
index 941f195f51403a46f18cb24e15de8e879b0fef19..7e8186921e71dde0e4785e6c3a1b30d23172ef42 100644
--- a/src/core/iomgr/workqueue_windows.h
+++ b/src/core/iomgr/workqueue_windows.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_WINDOWS_H
-#define GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_WINDOWS_H
+#ifndef GRPC_CORE_IOMGR_WORKQUEUE_WINDOWS_H
+#define GRPC_CORE_IOMGR_WORKQUEUE_WINDOWS_H
 
-#endif /* GRPC_INTERNAL_CORE_IOMGR_WORKQUEUE_WINDOWS_H */
+#endif /* GRPC_CORE_IOMGR_WORKQUEUE_WINDOWS_H */
diff --git a/src/core/json/json.h b/src/core/json/json.h
index c4df2998c3a9ea69b3fbc59baf58c4dfd3c408f9..aea9d5dadba6a576115d0bfe3354af3851b8a918 100644
--- a/src/core/json/json.h
+++ b/src/core/json/json.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_JSON_JSON_H
-#define GRPC_INTERNAL_CORE_JSON_JSON_H
+#ifndef GRPC_CORE_JSON_JSON_H
+#define GRPC_CORE_JSON_JSON_H
 
 #include <stdlib.h>
 
@@ -85,4 +85,4 @@ char *grpc_json_dump_to_string(grpc_json *json, int indent);
 grpc_json *grpc_json_create(grpc_json_type type);
 void grpc_json_destroy(grpc_json *json);
 
-#endif /* GRPC_INTERNAL_CORE_JSON_JSON_H */
+#endif /* GRPC_CORE_JSON_JSON_H */
diff --git a/src/core/json/json_common.h b/src/core/json/json_common.h
index 481695b38b8412c21235aa22c4cface56c70b344..7205a946850d65fd6c8a0782bfa71256bf4838f8 100644
--- a/src/core/json/json_common.h
+++ b/src/core/json/json_common.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_JSON_JSON_COMMON_H
-#define GRPC_INTERNAL_CORE_JSON_JSON_COMMON_H
+#ifndef GRPC_CORE_JSON_JSON_COMMON_H
+#define GRPC_CORE_JSON_JSON_COMMON_H
 
 /* The various json types. */
 typedef enum {
@@ -46,4 +46,4 @@ typedef enum {
   GRPC_JSON_TOP_LEVEL
 } grpc_json_type;
 
-#endif /* GRPC_INTERNAL_CORE_JSON_JSON_COMMON_H */
+#endif /* GRPC_CORE_JSON_JSON_COMMON_H */
diff --git a/src/core/json/json_reader.h b/src/core/json/json_reader.h
index 90b9f1f9fead95b693e9a7ac93286631f0b47e83..f25f44b2ef955bb99248dbc9f6f9774fd5f63edd 100644
--- a/src/core/json/json_reader.h
+++ b/src/core/json/json_reader.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_JSON_JSON_READER_H
-#define GRPC_INTERNAL_CORE_JSON_JSON_READER_H
+#ifndef GRPC_CORE_JSON_JSON_READER_H
+#define GRPC_CORE_JSON_JSON_READER_H
 
 #include <grpc/support/port_platform.h>
 #include "src/core/json/json_common.h"
@@ -157,4 +157,4 @@ void grpc_json_reader_init(grpc_json_reader *reader,
  */
 int grpc_json_reader_is_complete(grpc_json_reader *reader);
 
-#endif /* GRPC_INTERNAL_CORE_JSON_JSON_READER_H */
+#endif /* GRPC_CORE_JSON_JSON_READER_H */
diff --git a/src/core/json/json_writer.h b/src/core/json/json_writer.h
index 9ef04aab012a787e12572a2230db4c082dfddb09..c3921269503d807e371e401570c558ab08a2ffa4 100644
--- a/src/core/json/json_writer.h
+++ b/src/core/json/json_writer.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,8 +43,8 @@
  * a valid UTF-8 string overall.
  */
 
-#ifndef GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H
-#define GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H
+#ifndef GRPC_CORE_JSON_JSON_WRITER_H
+#define GRPC_CORE_JSON_JSON_WRITER_H
 
 #include <stdlib.h>
 
@@ -94,4 +94,4 @@ void grpc_json_writer_value_raw_with_len(grpc_json_writer *writer,
 void grpc_json_writer_value_string(grpc_json_writer *writer,
                                    const char *string);
 
-#endif /* GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H */
+#endif /* GRPC_CORE_JSON_JSON_WRITER_H */
diff --git a/src/core/security/auth_filters.h b/src/core/security/auth_filters.h
index c179b54bec28af87f398fa679c4f248b87ba01aa..1154a1d914c4bc2f543ecdd6bf7d69cea00e87d0 100644
--- a/src/core/security/auth_filters.h
+++ b/src/core/security/auth_filters.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_AUTH_FILTERS_H
-#define GRPC_INTERNAL_CORE_SECURITY_AUTH_FILTERS_H
+#ifndef GRPC_CORE_SECURITY_AUTH_FILTERS_H
+#define GRPC_CORE_SECURITY_AUTH_FILTERS_H
 
 #include "src/core/channel/channel_stack.h"
 
 extern const grpc_channel_filter grpc_client_auth_filter;
 extern const grpc_channel_filter grpc_server_auth_filter;
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_AUTH_FILTERS_H */
+#endif /* GRPC_CORE_SECURITY_AUTH_FILTERS_H */
diff --git a/src/core/security/b64.h b/src/core/security/b64.h
index 3e3b52112093c6fcc1426c982e31fbc646ff904f..d18f69563d32b914ff1f03151d02759f53733dda 100644
--- a/src/core/security/b64.h
+++ b/src/core/security/b64.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_BASE64_H
-#define GRPC_INTERNAL_CORE_SECURITY_BASE64_H
+#ifndef GRPC_CORE_SECURITY_B64_H
+#define GRPC_CORE_SECURITY_B64_H
 
 #include <grpc/support/slice.h>
 
@@ -49,4 +49,4 @@ gpr_slice grpc_base64_decode(const char *b64, int url_safe);
 gpr_slice grpc_base64_decode_with_len(const char *b64, size_t b64_len,
                                       int url_safe);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_BASE64_H */
+#endif /* GRPC_CORE_SECURITY_B64_H */
diff --git a/src/core/security/credentials.c b/src/core/security/credentials.c
index b4fa616fa7ebe955ebd180f4f16e028bf9c44035..0ba6d5dd84b0ab1bcc8d885e1c1003a5c53ff093 100644
--- a/src/core/security/credentials.c
+++ b/src/core/security/credentials.c
@@ -38,7 +38,8 @@
 
 #include "src/core/channel/channel_args.h"
 #include "src/core/channel/http_client_filter.h"
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/parser.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/iomgr/executor.h"
 #include "src/core/json/json.h"
 #include "src/core/support/string.h"
@@ -539,7 +540,7 @@ static void oauth2_token_fetcher_destruct(grpc_call_credentials *creds) {
 
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    const grpc_httpcli_response *response, grpc_credentials_md_store **token_md,
+    const grpc_http_response *response, grpc_credentials_md_store **token_md,
     gpr_timespec *token_lifetime) {
   char *null_terminated_body = NULL;
   char *new_access_token = NULL;
@@ -629,7 +630,7 @@ end:
 
 static void on_oauth2_token_fetcher_http_response(
     grpc_exec_ctx *exec_ctx, void *user_data,
-    const grpc_httpcli_response *response) {
+    const grpc_http_response *response) {
   grpc_credentials_metadata_request *r =
       (grpc_credentials_metadata_request *)user_data;
   grpc_oauth2_token_fetcher_credentials *c =
@@ -706,13 +707,13 @@ static void compute_engine_fetch_oauth2(
     grpc_exec_ctx *exec_ctx, grpc_credentials_metadata_request *metadata_req,
     grpc_httpcli_context *httpcli_context, grpc_pollset *pollset,
     grpc_httpcli_response_cb response_cb, gpr_timespec deadline) {
-  grpc_httpcli_header header = {"Metadata-Flavor", "Google"};
+  grpc_http_header header = {"Metadata-Flavor", "Google"};
   grpc_httpcli_request request;
   memset(&request, 0, sizeof(grpc_httpcli_request));
   request.host = GRPC_COMPUTE_ENGINE_METADATA_HOST;
-  request.path = GRPC_COMPUTE_ENGINE_METADATA_TOKEN_PATH;
-  request.hdr_count = 1;
-  request.hdrs = &header;
+  request.http.path = GRPC_COMPUTE_ENGINE_METADATA_TOKEN_PATH;
+  request.http.hdr_count = 1;
+  request.http.hdrs = &header;
   grpc_httpcli_get(exec_ctx, httpcli_context, pollset, &request, deadline,
                    response_cb, metadata_req);
 }
@@ -747,8 +748,8 @@ static void refresh_token_fetch_oauth2(
     grpc_httpcli_response_cb response_cb, gpr_timespec deadline) {
   grpc_google_refresh_token_credentials *c =
       (grpc_google_refresh_token_credentials *)metadata_req->creds;
-  grpc_httpcli_header header = {"Content-Type",
-                                "application/x-www-form-urlencoded"};
+  grpc_http_header header = {"Content-Type",
+                             "application/x-www-form-urlencoded"};
   grpc_httpcli_request request;
   char *body = NULL;
   gpr_asprintf(&body, GRPC_REFRESH_TOKEN_POST_BODY_FORMAT_STRING,
@@ -756,9 +757,9 @@ static void refresh_token_fetch_oauth2(
                c->refresh_token.refresh_token);
   memset(&request, 0, sizeof(grpc_httpcli_request));
   request.host = GRPC_GOOGLE_OAUTH2_SERVICE_HOST;
-  request.path = GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH;
-  request.hdr_count = 1;
-  request.hdrs = &header;
+  request.http.path = GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH;
+  request.http.hdr_count = 1;
+  request.http.hdrs = &header;
   request.handshaker = &grpc_httpcli_ssl;
   grpc_httpcli_post(exec_ctx, httpcli_context, pollset, &request, body,
                     strlen(body), deadline, response_cb, metadata_req);
diff --git a/src/core/security/credentials.h b/src/core/security/credentials.h
index 0de4cd94689b2fb69c377c6febe13838fbb09705..afac7a5bf2802806cc5b2c7a172ccec48fa070e2 100644
--- a/src/core/security/credentials.h
+++ b/src/core/security/credentials.h
@@ -31,19 +31,20 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_CREDENTIALS_H
-#define GRPC_INTERNAL_CORE_SECURITY_CREDENTIALS_H
+#ifndef GRPC_CORE_SECURITY_CREDENTIALS_H
+#define GRPC_CORE_SECURITY_CREDENTIALS_H
 
 #include "src/core/transport/metadata_batch.h"
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 #include <grpc/support/sync.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
+#include "src/core/http/parser.h"
 #include "src/core/security/json_token.h"
 #include "src/core/security/security_connector.h"
 
-struct grpc_httpcli_response;
+struct grpc_http_response;
 
 /* --- Constants. --- */
 
@@ -207,7 +208,7 @@ grpc_call_credentials *grpc_credentials_contains_type(
 /* Exposed for testing only. */
 grpc_credentials_status
 grpc_oauth2_token_fetcher_credentials_parse_server_response(
-    const struct grpc_httpcli_response *response,
+    const struct grpc_http_response *response,
     grpc_credentials_md_store **token_md, gpr_timespec *token_lifetime);
 
 void grpc_flush_cached_google_default_credentials(void);
@@ -373,4 +374,4 @@ typedef struct {
   grpc_credentials_md_store *plugin_md;
 } grpc_plugin_credentials;
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_CREDENTIALS_H */
+#endif /* GRPC_CORE_SECURITY_CREDENTIALS_H */
diff --git a/src/core/security/google_default_credentials.c b/src/core/security/google_default_credentials.c
index 1f4f3e4aa52ef8dc3758db6dac08097859ad5560..3872e86993d9346a56b3b6ecfd5e58be156b6f62 100644
--- a/src/core/security/google_default_credentials.c
+++ b/src/core/security/google_default_credentials.c
@@ -39,7 +39,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
+#include "src/core/http/parser.h"
 #include "src/core/support/env.h"
 #include "src/core/support/load_file.h"
 #include "src/core/surface/api_trace.h"
@@ -66,14 +67,14 @@ typedef struct {
 
 static void on_compute_engine_detection_http_response(
     grpc_exec_ctx *exec_ctx, void *user_data,
-    const grpc_httpcli_response *response) {
+    const grpc_http_response *response) {
   compute_engine_detector *detector = (compute_engine_detector *)user_data;
   if (response != NULL && response->status == 200 && response->hdr_count > 0) {
     /* Internet providers can return a generic response to all requests, so
        it is necessary to check that metadata header is present also. */
     size_t i;
     for (i = 0; i < response->hdr_count; i++) {
-      grpc_httpcli_header *header = &response->hdrs[i];
+      grpc_http_header *header = &response->hdrs[i];
       if (strcmp(header->key, "Metadata-Flavor") == 0 &&
           strcmp(header->value, "Google") == 0) {
         detector->success = 1;
@@ -109,7 +110,7 @@ static int is_stack_running_on_compute_engine(void) {
 
   memset(&request, 0, sizeof(grpc_httpcli_request));
   request.host = GRPC_COMPUTE_ENGINE_DETECTION_HOST;
-  request.path = "/";
+  request.http.path = "/";
 
   grpc_httpcli_context_init(&context);
 
diff --git a/src/core/security/handshake.h b/src/core/security/handshake.h
index db8b3749215b95a1a79b0775d1a6e15d8e2eb64f..4872045874f6abbc82ae860e03a6eb821ab5a1e8 100644
--- a/src/core/security/handshake.h
+++ b/src/core/security/handshake.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_HANDSHAKE_H
-#define GRPC_INTERNAL_CORE_SECURITY_HANDSHAKE_H
+#ifndef GRPC_CORE_SECURITY_HANDSHAKE_H
+#define GRPC_CORE_SECURITY_HANDSHAKE_H
 
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/security/security_connector.h"
@@ -48,4 +48,4 @@ void grpc_do_security_handshake(grpc_exec_ctx *exec_ctx,
 
 void grpc_security_handshake_shutdown(grpc_exec_ctx *exec_ctx, void *handshake);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_HANDSHAKE_H */
+#endif /* GRPC_CORE_SECURITY_HANDSHAKE_H */
diff --git a/src/core/security/json_token.h b/src/core/security/json_token.h
index 7e06864ff3adb5c013e2fab49c2619d2ebdb1b67..d183f9b3a358f53a25ca4cf01f8808fdd5eae647 100644
--- a/src/core/security/json_token.h
+++ b/src/core/security/json_token.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_JSON_TOKEN_H
-#define GRPC_INTERNAL_CORE_SECURITY_JSON_TOKEN_H
+#ifndef GRPC_CORE_SECURITY_JSON_TOKEN_H
+#define GRPC_CORE_SECURITY_JSON_TOKEN_H
 
 #include <grpc/support/slice.h>
 #include <openssl/rsa.h>
@@ -115,4 +115,4 @@ grpc_auth_refresh_token grpc_auth_refresh_token_create_from_json(
 /* Destructs the object. */
 void grpc_auth_refresh_token_destruct(grpc_auth_refresh_token *refresh_token);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_JSON_TOKEN_H */
+#endif /* GRPC_CORE_SECURITY_JSON_TOKEN_H */
diff --git a/src/core/security/jwt_verifier.c b/src/core/security/jwt_verifier.c
index 928c6c148dedc24d25a6a51b44ff9e5d7ca2721d..0bb8e0530604af9ad463dd3e8f1c789554178273 100644
--- a/src/core/security/jwt_verifier.c
+++ b/src/core/security/jwt_verifier.c
@@ -36,7 +36,7 @@
 #include <limits.h>
 #include <string.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/security/b64.h"
 #include "src/core/tsi/ssl_types.h"
 
@@ -635,11 +635,11 @@ static void on_openid_config_retrieved(grpc_exec_ctx *exec_ctx, void *user_data,
   jwks_uri += 8;
   req.handshaker = &grpc_httpcli_ssl;
   req.host = gpr_strdup(jwks_uri);
-  req.path = strchr(jwks_uri, '/');
-  if (req.path == NULL) {
-    req.path = "";
+  req.http.path = strchr(jwks_uri, '/');
+  if (req.http.path == NULL) {
+    req.http.path = "";
   } else {
-    *(req.host + (req.path - jwks_uri)) = '\0';
+    *(req.host + (req.http.path - jwks_uri)) = '\0';
   }
   grpc_httpcli_get(
       exec_ctx, &ctx->verifier->http_ctx, ctx->pollset, &req,
@@ -725,20 +725,20 @@ static void retrieve_key_and_verify(grpc_exec_ctx *exec_ctx,
     req.host = gpr_strdup(mapping->key_url_prefix);
     path_prefix = strchr(req.host, '/');
     if (path_prefix == NULL) {
-      gpr_asprintf(&req.path, "/%s", iss);
+      gpr_asprintf(&req.http.path, "/%s", iss);
     } else {
       *(path_prefix++) = '\0';
-      gpr_asprintf(&req.path, "/%s/%s", path_prefix, iss);
+      gpr_asprintf(&req.http.path, "/%s/%s", path_prefix, iss);
     }
     http_cb = on_keys_retrieved;
   } else {
     req.host = gpr_strdup(strstr(iss, "https://") == iss ? iss + 8 : iss);
     path_prefix = strchr(req.host, '/');
     if (path_prefix == NULL) {
-      req.path = gpr_strdup(GRPC_OPENID_CONFIG_URL_SUFFIX);
+      req.http.path = gpr_strdup(GRPC_OPENID_CONFIG_URL_SUFFIX);
     } else {
       *(path_prefix++) = 0;
-      gpr_asprintf(&req.path, "/%s%s", path_prefix,
+      gpr_asprintf(&req.http.path, "/%s%s", path_prefix,
                    GRPC_OPENID_CONFIG_URL_SUFFIX);
     }
     http_cb = on_openid_config_retrieved;
@@ -749,7 +749,7 @@ static void retrieve_key_and_verify(grpc_exec_ctx *exec_ctx,
       gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), grpc_jwt_verifier_max_delay),
       http_cb, ctx);
   gpr_free(req.host);
-  gpr_free(req.path);
+  gpr_free(req.http.path);
   return;
 
 error:
diff --git a/src/core/security/jwt_verifier.h b/src/core/security/jwt_verifier.h
index 25613f03a07f14c1e099f77831b72db14a1ffb4f..d898d2193f7b9fa0d53e582485dca16f5c0d823c 100644
--- a/src/core/security/jwt_verifier.h
+++ b/src/core/security/jwt_verifier.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H
-#define GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H
+#ifndef GRPC_CORE_SECURITY_JWT_VERIFIER_H
+#define GRPC_CORE_SECURITY_JWT_VERIFIER_H
 
 #include "src/core/iomgr/pollset.h"
 #include "src/core/json/json.h"
@@ -133,4 +133,4 @@ grpc_jwt_claims *grpc_jwt_claims_from_json(grpc_json *json, gpr_slice buffer);
 grpc_jwt_verifier_status grpc_jwt_claims_check(const grpc_jwt_claims *claims,
                                                const char *audience);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_JWT_VERIFIER_H */
+#endif /* GRPC_CORE_SECURITY_JWT_VERIFIER_H */
diff --git a/src/core/security/secure_endpoint.h b/src/core/security/secure_endpoint.h
index c563bdd9c505f42241ffbace849ce34c774efa8f..5176ef20596f4649205eb78c0a740eaece9060f0 100644
--- a/src/core/security/secure_endpoint.h
+++ b/src/core/security/secure_endpoint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_SECURE_ENDPOINT_H
-#define GRPC_INTERNAL_CORE_SECURITY_SECURE_ENDPOINT_H
+#ifndef GRPC_CORE_SECURITY_SECURE_ENDPOINT_H
+#define GRPC_CORE_SECURITY_SECURE_ENDPOINT_H
 
 #include "src/core/iomgr/endpoint.h"
 #include <grpc/support/slice.h>
@@ -46,4 +46,4 @@ grpc_endpoint *grpc_secure_endpoint_create(
     struct tsi_frame_protector *protector, grpc_endpoint *to_wrap,
     gpr_slice *leftover_slices, size_t leftover_nslices);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_SECURE_ENDPOINT_H */
+#endif /* GRPC_CORE_SECURITY_SECURE_ENDPOINT_H */
diff --git a/src/core/security/security_connector.h b/src/core/security/security_connector.h
index 1e35d3f9b7ce8f5f98ab1ff8b59bb04650159914..6f915ebb9d38084e9f21b2e5d1bfcf9cbc711c04 100644
--- a/src/core/security/security_connector.h
+++ b/src/core/security/security_connector.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONNECTOR_H
-#define GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONNECTOR_H
+#ifndef GRPC_CORE_SECURITY_SECURITY_CONNECTOR_H
+#define GRPC_CORE_SECURITY_SECURITY_CONNECTOR_H
 
 #include <grpc/grpc_security.h>
 #include "src/core/iomgr/endpoint.h"
@@ -263,4 +263,4 @@ tsi_peer tsi_shallow_peer_from_ssl_auth_context(
     const grpc_auth_context *auth_context);
 void tsi_shallow_peer_destruct(tsi_peer *peer);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONNECTOR_H */
+#endif /* GRPC_CORE_SECURITY_SECURITY_CONNECTOR_H */
diff --git a/src/core/security/security_context.h b/src/core/security/security_context.h
index 794258edbcb1470474e9154416d2ddf17a35a2d0..61601f538b7a93e4daabe33b035a3dee091393b3 100644
--- a/src/core/security/security_context.h
+++ b/src/core/security/security_context.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H
-#define GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H
+#ifndef GRPC_CORE_SECURITY_SECURITY_CONTEXT_H
+#define GRPC_CORE_SECURITY_SECURITY_CONTEXT_H
 
 #include "src/core/iomgr/pollset.h"
 #include "src/core/security/credentials.h"
@@ -111,4 +111,4 @@ grpc_auth_context *grpc_auth_context_from_arg(const grpc_arg *arg);
 grpc_auth_context *grpc_find_auth_context_in_args(
     const grpc_channel_args *args);
 
-#endif /* GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONTEXT_H */
+#endif /* GRPC_CORE_SECURITY_SECURITY_CONTEXT_H */
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index 91547eb26e91ce168aff8fb57b4ca71bd1ad5c69..009ec95682cf069aa9f885c2af7676adaa80851d 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -83,8 +83,6 @@ static void state_unref(grpc_server_secure_state *state) {
 static void setup_transport(grpc_exec_ctx *exec_ctx, void *statep,
                             grpc_transport *transport,
                             grpc_auth_context *auth_context) {
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_server_auth_filter, &grpc_http_server_filter};
   grpc_server_secure_state *state = statep;
   grpc_channel_args *args_copy;
   grpc_arg args_to_add[2];
@@ -93,8 +91,7 @@ static void setup_transport(grpc_exec_ctx *exec_ctx, void *statep,
   args_copy = grpc_channel_args_copy_and_add(
       grpc_server_get_channel_args(state->server), args_to_add,
       GPR_ARRAY_SIZE(args_to_add));
-  grpc_server_setup_transport(exec_ctx, state->server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters), args_copy);
+  grpc_server_setup_transport(exec_ctx, state->server, transport, args_copy);
   grpc_channel_args_destroy(args_copy);
 }
 
diff --git a/src/core/statistics/census_interface.h b/src/core/statistics/census_interface.h
index c43acbd317fbbd50f3dc0f9f82c9711301f79990..ce8ff92cd4e384d5269f63bdc6e57b0396e69be7 100644
--- a/src/core/statistics/census_interface.h
+++ b/src/core/statistics/census_interface.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_CENSUS_INTERFACE_H
-#define GRPC_INTERNAL_CORE_STATISTICS_CENSUS_INTERFACE_H
+#ifndef GRPC_CORE_STATISTICS_CENSUS_INTERFACE_H
+#define GRPC_CORE_STATISTICS_CENSUS_INTERFACE_H
 
 #include <grpc/support/port_platform.h>
 
@@ -73,4 +73,4 @@ census_op_id census_tracing_start_op(void);
 /* Ends tracing. Calling this function will invalidate the input op_id. */
 void census_tracing_end_op(census_op_id op_id);
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_CENSUS_INTERFACE_H */
+#endif /* GRPC_CORE_STATISTICS_CENSUS_INTERFACE_H */
diff --git a/src/core/statistics/census_log.h b/src/core/statistics/census_log.h
index 356437c346e948aed78cfe346e2127e2da1dec5d..e7ce0d4433fa27c0ee1d8b19287b8bd65f0b2741 100644
--- a/src/core/statistics/census_log.h
+++ b/src/core/statistics/census_log.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_CENSUS_LOG_H
-#define GRPC_INTERNAL_CORE_STATISTICS_CENSUS_LOG_H
+#ifndef GRPC_CORE_STATISTICS_CENSUS_LOG_H
+#define GRPC_CORE_STATISTICS_CENSUS_LOG_H
 
 #include <stddef.h>
 
@@ -88,4 +88,4 @@ size_t census_log_remaining_space(void);
    out-of-space. */
 int census_log_out_of_space_count(void);
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_CENSUS_LOG_H */
+#endif /* GRPC_CORE_STATISTICS_CENSUS_LOG_H */
diff --git a/src/core/statistics/census_rpc_stats.h b/src/core/statistics/census_rpc_stats.h
index 8bdbc494903872d80ca1f22baf0a1e82aeee4fb5..4cf17d2e52c7a0d7b57ad467209449cf6d816460 100644
--- a/src/core/statistics/census_rpc_stats.h
+++ b/src/core/statistics/census_rpc_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_CENSUS_RPC_STATS_H
-#define GRPC_INTERNAL_CORE_STATISTICS_CENSUS_RPC_STATS_H
+#ifndef GRPC_CORE_STATISTICS_CENSUS_RPC_STATS_H
+#define GRPC_CORE_STATISTICS_CENSUS_RPC_STATS_H
 
 #include "src/core/statistics/census_interface.h"
 #include <grpc/support/port_platform.h>
@@ -98,4 +98,4 @@ void census_stats_store_shutdown(void);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_CENSUS_RPC_STATS_H */
+#endif /* GRPC_CORE_STATISTICS_CENSUS_RPC_STATS_H */
diff --git a/src/core/statistics/census_tracing.h b/src/core/statistics/census_tracing.h
index bb3f2556d20349e400905c2b22e32655cbaa397f..b611e95bf4a688c666aafd00b74ebbe17e181e38 100644
--- a/src/core/statistics/census_tracing.h
+++ b/src/core/statistics/census_tracing.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_CENSUS_TRACING_H
-#define GRPC_INTERNAL_CORE_STATISTICS_CENSUS_TRACING_H
+#ifndef GRPC_CORE_STATISTICS_CENSUS_TRACING_H
+#define GRPC_CORE_STATISTICS_CENSUS_TRACING_H
 
 #include <grpc/support/time.h>
 #include "src/core/statistics/census_rpc_stats.h"
@@ -93,4 +93,4 @@ census_trace_obj **census_get_active_ops(int *num_active_ops);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_CENSUS_TRACING_H */
+#endif /* GRPC_CORE_STATISTICS_CENSUS_TRACING_H */
diff --git a/src/core/statistics/hash_table.h b/src/core/statistics/hash_table.h
index d9860a909f0afda7ed56816904521dbfc8922116..f4bf2ba49afc79bc1360a0aad309963393dbd21b 100644
--- a/src/core/statistics/hash_table.h
+++ b/src/core/statistics/hash_table.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_HASH_TABLE_H
-#define GRPC_INTERNAL_CORE_STATISTICS_HASH_TABLE_H
+#ifndef GRPC_CORE_STATISTICS_HASH_TABLE_H
+#define GRPC_CORE_STATISTICS_HASH_TABLE_H
 
 #include <stddef.h>
 
@@ -128,4 +128,4 @@ typedef void (*census_ht_itr_cb)(census_ht_key key, const void *val_ptr,
    should not invalidate data entries. */
 uint64_t census_ht_for_all(const census_ht *ht, census_ht_itr_cb);
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_HASH_TABLE_H */
+#endif /* GRPC_CORE_STATISTICS_HASH_TABLE_H */
diff --git a/src/core/statistics/window_stats.h b/src/core/statistics/window_stats.h
index f4732e96a02e4083e9bbca550ae84436e7f717e0..774277180f60238e93cb9159028dbecd69160fc2 100644
--- a/src/core/statistics/window_stats.h
+++ b/src/core/statistics/window_stats.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_STATISTICS_WINDOW_STATS_H
-#define GRPC_INTERNAL_CORE_STATISTICS_WINDOW_STATS_H
+#ifndef GRPC_CORE_STATISTICS_WINDOW_STATS_H
+#define GRPC_CORE_STATISTICS_WINDOW_STATS_H
 
 #include <grpc/support/time.h>
 
@@ -170,4 +170,4 @@ void census_window_stats_get_sums(const struct census_window_stats *wstats,
    assertion failure). This function is thread-compatible. */
 void census_window_stats_destroy(struct census_window_stats *wstats);
 
-#endif /* GRPC_INTERNAL_CORE_STATISTICS_WINDOW_STATS_H */
+#endif /* GRPC_CORE_STATISTICS_WINDOW_STATS_H */
diff --git a/src/core/support/backoff.c b/src/core/support/backoff.c
index 745821964560193b03a7acd0b69e33d3f4c82805..4ccfb774ed6b40f1eaf3eebd5115f22eedb4f69e 100644
--- a/src/core/support/backoff.c
+++ b/src/core/support/backoff.c
@@ -69,3 +69,8 @@ gpr_timespec gpr_backoff_step(gpr_backoff *backoff, gpr_timespec now) {
   return gpr_time_add(
       now, gpr_time_from_millis(backoff->current_timeout_millis, GPR_TIMESPAN));
 }
+
+void gpr_backoff_reset(gpr_backoff *backoff) {
+  // forces step() to return a timeout of min_timeout_millis
+  backoff->current_timeout_millis = 0;
+}
diff --git a/src/core/support/backoff.h b/src/core/support/backoff.h
index 3234aa214d417c8393e5d1297c991dab2d5a4169..0f933c31495ea6b100367e5710d6bac830b66dcc 100644
--- a/src/core/support/backoff.h
+++ b/src/core/support/backoff.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_BACKOFF_H
-#define GRPC_INTERNAL_CORE_SUPPORT_BACKOFF_H
+#ifndef GRPC_CORE_SUPPORT_BACKOFF_H
+#define GRPC_CORE_SUPPORT_BACKOFF_H
 
 #include <grpc/support/time.h>
 
@@ -61,5 +61,8 @@ void gpr_backoff_init(gpr_backoff *backoff, double multiplier, double jitter,
 gpr_timespec gpr_backoff_begin(gpr_backoff *backoff, gpr_timespec now);
 /// Step a retry loop: returns a timespec for the NEXT retry
 gpr_timespec gpr_backoff_step(gpr_backoff *backoff, gpr_timespec now);
+/// Reset the backoff, so the next gpr_backoff_step will be a gpr_backoff_begin
+/// instead
+void gpr_backoff_reset(gpr_backoff *backoff);
 
-#endif  // GRPC_INTERNAL_CORE_SUPPORT_BACKOFF_H
+#endif /* GRPC_CORE_SUPPORT_BACKOFF_H */
diff --git a/src/core/support/block_annotate.h b/src/core/support/block_annotate.h
index 3cd8eee272d3f3556afa9b86b49c26634b592517..79a18039f4ccf602da5e8cd692bf91dc77b018a2 100644
--- a/src/core/support/block_annotate.h
+++ b/src/core/support/block_annotate.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_BLOCK_ANNOTATE_H
-#define GRPC_INTERNAL_CORE_SUPPORT_BLOCK_ANNOTATE_H
+#ifndef GRPC_CORE_SUPPORT_BLOCK_ANNOTATE_H
+#define GRPC_CORE_SUPPORT_BLOCK_ANNOTATE_H
 
 /* These annotations identify the beginning and end of regions where
    the code may block for reasons other than synchronization functions.
@@ -45,4 +45,4 @@
   do {                                      \
   } while (0)
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_BLOCK_ANNOTATE_H */
+#endif /* GRPC_CORE_SUPPORT_BLOCK_ANNOTATE_H */
diff --git a/src/core/support/env.h b/src/core/support/env.h
index 24172d86737eceb6ccfbd4f4bb854b0d2bbbe4f8..29024569473326e925f6f83c61beb9d51e82e09f 100644
--- a/src/core/support/env.h
+++ b/src/core/support/env.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_ENV_H
-#define GRPC_INTERNAL_CORE_SUPPORT_ENV_H
+#ifndef GRPC_CORE_SUPPORT_ENV_H
+#define GRPC_CORE_SUPPORT_ENV_H
 
 #include <stdio.h>
 
@@ -57,4 +57,4 @@ void gpr_setenv(const char *name, const char *value);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_ENV_H */
+#endif /* GRPC_CORE_SUPPORT_ENV_H */
diff --git a/src/core/support/load_file.h b/src/core/support/load_file.h
index 746319a50d22bbafa4fd685efa5cafd6c1920ebb..5896654e9a0c4078b68e5790d64eb36740ab3084 100644
--- a/src/core/support/load_file.h
+++ b/src/core/support/load_file.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_LOAD_FILE_H
-#define GRPC_INTERNAL_CORE_SUPPORT_LOAD_FILE_H
+#ifndef GRPC_CORE_SUPPORT_LOAD_FILE_H
+#define GRPC_CORE_SUPPORT_LOAD_FILE_H
 
 #include <stdio.h>
 
@@ -52,4 +52,4 @@ gpr_slice gpr_load_file(const char *filename, int add_null_terminator,
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_LOAD_FILE_H */
+#endif /* GRPC_CORE_SUPPORT_LOAD_FILE_H */
diff --git a/src/core/support/murmur_hash.h b/src/core/support/murmur_hash.h
index 0bf04f731ad85588e5e6d2d5eeefdc4e11c9065f..0f0b399e5dc9386cb358dc8ecbaf6ce3754688a4 100644
--- a/src/core/support/murmur_hash.h
+++ b/src/core/support/murmur_hash.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_MURMUR_HASH_H
-#define GRPC_INTERNAL_CORE_SUPPORT_MURMUR_HASH_H
+#ifndef GRPC_CORE_SUPPORT_MURMUR_HASH_H
+#define GRPC_CORE_SUPPORT_MURMUR_HASH_H
 
 #include <grpc/support/port_platform.h>
 
@@ -41,4 +41,4 @@
 /* compute the hash of key (length len) */
 uint32_t gpr_murmur_hash3(const void *key, size_t len, uint32_t seed);
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_MURMUR_HASH_H */
+#endif /* GRPC_CORE_SUPPORT_MURMUR_HASH_H */
diff --git a/src/core/support/stack_lockfree.h b/src/core/support/stack_lockfree.h
index ca58dd007a2ef7b4adb575b57de1bdd61ce8d516..d6fd06d67cb445de1e08c0b0254473271394f3be 100644
--- a/src/core/support/stack_lockfree.h
+++ b/src/core/support/stack_lockfree.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H
-#define GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H
+#ifndef GRPC_CORE_SUPPORT_STACK_LOCKFREE_H
+#define GRPC_CORE_SUPPORT_STACK_LOCKFREE_H
 
 #include <stddef.h>
 
@@ -50,4 +50,4 @@ int gpr_stack_lockfree_push(gpr_stack_lockfree *, int entry);
 /* Returns -1 on empty or the actual entry number */
 int gpr_stack_lockfree_pop(gpr_stack_lockfree *stack);
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_STACK_LOCKFREE_H */
+#endif /* GRPC_CORE_SUPPORT_STACK_LOCKFREE_H */
diff --git a/src/core/support/string.h b/src/core/support/string.h
index e6755de106cbc41e5954c0012d4db8f1b597ae7c..a367ed7cd80a1f91a1fc5f1d968da9ce36885725 100644
--- a/src/core/support/string.h
+++ b/src/core/support/string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_STRING_H
-#define GRPC_INTERNAL_CORE_SUPPORT_STRING_H
+#ifndef GRPC_CORE_SUPPORT_STRING_H
+#define GRPC_CORE_SUPPORT_STRING_H
 
 #include <stddef.h>
 
@@ -118,4 +118,4 @@ char *gpr_strvec_flatten(gpr_strvec *strs, size_t *total_length);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_STRING_H */
+#endif /* GRPC_CORE_SUPPORT_STRING_H */
diff --git a/src/core/support/string_win32.h b/src/core/support/string_win32.h
index e3043656fbaa510dc6bc43c8956c3f14f412f9fd..c9ae8d9932596c94689b41df77e6018cbb3cd5e4 100644
--- a/src/core/support/string_win32.h
+++ b/src/core/support/string_win32.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_STRING_WIN32_H
-#define GRPC_INTERNAL_CORE_SUPPORT_STRING_WIN32_H
+#ifndef GRPC_CORE_SUPPORT_STRING_WIN32_H
+#define GRPC_CORE_SUPPORT_STRING_WIN32_H
 
 #include <grpc/support/port_platform.h>
 
@@ -44,4 +44,4 @@ LPSTR gpr_tchar_to_char(LPCTSTR input);
 
 #endif /* GPR_WIN32 */
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_STRING_WIN32_H */
+#endif /* GRPC_CORE_SUPPORT_STRING_WIN32_H */
diff --git a/src/core/support/thd_internal.h b/src/core/support/thd_internal.h
index 1508c4691f249c36326b380755add3db396d8595..33b904e59b1666e36bdc75c5404b66e4f477787a 100644
--- a/src/core/support/thd_internal.h
+++ b/src/core/support/thd_internal.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,9 +31,9 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_THD_INTERNAL_H
-#define GRPC_INTERNAL_CORE_SUPPORT_THD_INTERNAL_H
+#ifndef GRPC_CORE_SUPPORT_THD_INTERNAL_H
+#define GRPC_CORE_SUPPORT_THD_INTERNAL_H
 
 /* Internal interfaces between modules within the gpr support library.  */
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_THD_INTERNAL_H */
+#endif /* GRPC_CORE_SUPPORT_THD_INTERNAL_H */
diff --git a/src/core/support/time_precise.h b/src/core/support/time_precise.h
index 80c5000123d6bf7767a8a28dac682121af332e48..871c99a6238ec398f764d50848757feb8e78cf26 100644
--- a/src/core/support/time_precise.h
+++ b/src/core/support/time_precise.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_CORE_SUPPORT_TIME_PRECISE_H_
-#define GRPC_CORE_SUPPORT_TIME_PRECISE_H_
+#ifndef GRPC_CORE_SUPPORT_TIME_PRECISE_H
+#define GRPC_CORE_SUPPORT_TIME_PRECISE_H
 
 #include <grpc/support/time.h>
 
 void gpr_precise_clock_init(void);
 void gpr_precise_clock_now(gpr_timespec *clk);
 
-#endif /* GRPC_CORE_SUPPORT_TIME_PRECISE_ */
+#endif /* GRPC_CORE_SUPPORT_TIME_PRECISE_H */
diff --git a/src/core/support/tmpfile.h b/src/core/support/tmpfile.h
index cecc71e2429c520c53ee5efbcbfbcc826bcee113..df6f8692bbedb3df6ae57b5b9f45e09659ae2ec9 100644
--- a/src/core/support/tmpfile.h
+++ b/src/core/support/tmpfile.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SUPPORT_TMPFILE_H
-#define GRPC_INTERNAL_CORE_SUPPORT_TMPFILE_H
+#ifndef GRPC_CORE_SUPPORT_TMPFILE_H
+#define GRPC_CORE_SUPPORT_TMPFILE_H
 
 #include <stdio.h>
 
@@ -52,4 +52,4 @@ FILE *gpr_tmpfile(const char *prefix, char **tmp_filename);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SUPPORT_TMPFILE_H */
+#endif /* GRPC_CORE_SUPPORT_TMPFILE_H */
diff --git a/src/core/surface/api_trace.h b/src/core/surface/api_trace.h
index 82bbf3b62b3a2231cc7602b249f4d48fada7ad8a..29a9b2d79cebea90e67e824af40ab3abcadf695f 100644
--- a/src/core/surface/api_trace.h
+++ b/src/core/surface/api_trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_API_TRACE_H
-#define GRPC_INTERNAL_CORE_SURFACE_API_TRACE_H
+#ifndef GRPC_CORE_SURFACE_API_TRACE_H
+#define GRPC_CORE_SURFACE_API_TRACE_H
 
 #include "src/core/debug/trace.h"
 #include <grpc/support/log.h>
@@ -62,4 +62,4 @@ extern int grpc_api_trace;
     gpr_log(GPR_INFO, fmt GRPC_API_TRACE_UNWRAP##nargs args); \
   }
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_API_TRACE_H */
+#endif /* GRPC_CORE_SURFACE_API_TRACE_H */
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index 1b117aa6b8ca752f7987688c474d159c9d60f2f5..6f1cd1df108203957c753d455ff702aa0c31e6a3 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -1481,3 +1481,11 @@ void *grpc_call_context_get(grpc_call *call, grpc_context_index elem) {
 }
 
 uint8_t grpc_call_is_client(grpc_call *call) { return call->is_client; }
+
+grpc_compression_algorithm grpc_call_compression_for_level(
+    grpc_call *call, grpc_compression_level level) {
+  gpr_mu_lock(&call->mu);
+  const uint32_t accepted_encodings = call->encodings_accepted_by_peer;
+  gpr_mu_unlock(&call->mu);
+  return grpc_compression_algorithm_for_level(level, accepted_encodings);
+}
diff --git a/src/core/surface/call.h b/src/core/surface/call.h
index 0bbffb98ae074aa3de53e106b465797dd8c2d5a1..d2edf03d45cd7c64e67211b33f547db28b29bcdb 100644
--- a/src/core/surface/call.h
+++ b/src/core/surface/call.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,16 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_CALL_H
-#define GRPC_INTERNAL_CORE_SURFACE_CALL_H
+#ifndef GRPC_CORE_SURFACE_CALL_H
+#define GRPC_CORE_SURFACE_CALL_H
 
 #include "src/core/channel/channel_stack.h"
 #include "src/core/channel/context.h"
 #include "src/core/surface/api_trace.h"
 #include "src/core/surface/surface_trace.h"
+
 #include <grpc/grpc.h>
+#include <grpc/impl/codegen/compression_types.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -102,8 +104,13 @@ void *grpc_call_context_get(grpc_call *call, grpc_context_index elem);
 
 uint8_t grpc_call_is_client(grpc_call *call);
 
+/* Return an appropriate compression algorithm for the requested compression \a
+ * level in the context of \a call. */
+grpc_compression_algorithm grpc_call_compression_for_level(
+    grpc_call *call, grpc_compression_level level);
+
 #ifdef __cplusplus
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_CALL_H */
+#endif /* GRPC_CORE_SURFACE_CALL_H */
diff --git a/src/core/surface/call_test_only.h b/src/core/surface/call_test_only.h
index b57c95c64a5b9a0c55c028672bf07d4b7c50c6d7..fdc43a383ba3273dc4127cc31c9d5ec30c7b1b8f 100644
--- a/src/core/surface/call_test_only.h
+++ b/src/core/surface/call_test_only.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_CALL_TEST_ONLY_H
-#define GRPC_INTERNAL_CORE_SURFACE_CALL_TEST_ONLY_H
+#ifndef GRPC_CORE_SURFACE_CALL_TEST_ONLY_H
+#define GRPC_CORE_SURFACE_CALL_TEST_ONLY_H
 
 #include <grpc/grpc.h>
 
@@ -61,4 +61,4 @@ uint32_t grpc_call_test_only_get_encodings_accepted_by_peer(grpc_call *call);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_CALL_TEST_ONLY_H */
+#endif /* GRPC_CORE_SURFACE_CALL_TEST_ONLY_H */
diff --git a/src/core/surface/channel.c b/src/core/surface/channel.c
index 12d8ebceb9045f08f76ba8e424ecdc611eee1782..964ab344316206e25f5f0d6aa8bb70c335e4b5e7 100644
--- a/src/core/surface/channel.c
+++ b/src/core/surface/channel.c
@@ -40,6 +40,7 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/surface/channel_init.h"
 #include "src/core/client_config/resolver_registry.h"
 #include "src/core/iomgr/iomgr.h"
 #include "src/core/support/string.h"
@@ -82,24 +83,25 @@ struct grpc_channel {
 
 static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg, bool success);
 
-grpc_channel *grpc_channel_create_from_filters(
-    grpc_exec_ctx *exec_ctx, const char *target,
-    const grpc_channel_filter **filters, size_t num_filters,
-    const grpc_channel_args *args, int is_client) {
-  size_t i;
-  size_t size =
-      sizeof(grpc_channel) + grpc_channel_stack_size(filters, num_filters);
-  grpc_channel *channel = gpr_malloc(size);
+grpc_channel *grpc_channel_create(grpc_exec_ctx *exec_ctx, const char *target,
+                                  const grpc_channel_args *args,
+                                  grpc_channel_stack_type channel_stack_type,
+                                  grpc_transport *optional_transport) {
+  bool is_client = grpc_channel_stack_type_is_client(channel_stack_type);
+
+  grpc_channel *channel = grpc_channel_init_create_stack(
+      exec_ctx, channel_stack_type, sizeof(grpc_channel), args, 1,
+      destroy_channel, NULL, optional_transport);
+
   memset(channel, 0, sizeof(*channel));
   channel->target = gpr_strdup(target);
-  GPR_ASSERT(grpc_is_initialized() && "call grpc_init()");
   channel->is_client = is_client;
   gpr_mu_init(&channel->registered_call_mu);
   channel->registered_calls = NULL;
 
   channel->max_message_length = DEFAULT_MAX_MESSAGE_LENGTH;
   if (args) {
-    for (i = 0; i < args->num_args; i++) {
+    for (size_t i = 0; i < args->num_args; i++) {
       if (0 == strcmp(args->args[i].key, GRPC_ARG_MAX_MESSAGE_LENGTH)) {
         if (args->args[i].type != GRPC_ARG_INTEGER) {
           gpr_log(GPR_ERROR, "%s ignored: it must be an integer",
@@ -152,11 +154,6 @@ grpc_channel *grpc_channel_create_from_filters(
     gpr_free(default_authority);
   }
 
-  grpc_channel_stack_init(exec_ctx, 1, destroy_channel, channel, filters,
-                          num_filters, args,
-                          is_client ? "CLIENT_CHANNEL" : "SERVER_CHANNEL",
-                          CHANNEL_STACK_FROM_CHANNEL(channel));
-
   return channel;
 }
 
diff --git a/src/core/surface/channel.h b/src/core/surface/channel.h
index 00240c637fdcf5b67eb24cf47c4e5c653e36b7d9..c08988d9e7153e175982878d166385ef0a1a0a7c 100644
--- a/src/core/surface/channel.h
+++ b/src/core/surface/channel.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,17 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_CHANNEL_H
-#define GRPC_INTERNAL_CORE_SURFACE_CHANNEL_H
+#ifndef GRPC_CORE_SURFACE_CHANNEL_H
+#define GRPC_CORE_SURFACE_CHANNEL_H
 
 #include "src/core/channel/channel_stack.h"
+#include "src/core/surface/channel_stack_type.h"
 #include "src/core/client_config/subchannel_factory.h"
 
-grpc_channel *grpc_channel_create_from_filters(
-    grpc_exec_ctx *exec_ctx, const char *target,
-    const grpc_channel_filter **filters, size_t count,
-    const grpc_channel_args *args, int is_client);
+grpc_channel *grpc_channel_create(grpc_exec_ctx *exec_ctx, const char *target,
+                                  const grpc_channel_args *args,
+                                  grpc_channel_stack_type channel_stack_type,
+                                  grpc_transport *optional_transport);
 
 /** Get a (borrowed) pointer to this channels underlying channel stack */
 grpc_channel_stack *grpc_channel_get_channel_stack(grpc_channel *channel);
@@ -71,4 +72,4 @@ void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx,
   grpc_channel_internal_unref(exec_ctx, channel)
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_CHANNEL_H */
+#endif /* GRPC_CORE_SURFACE_CHANNEL_H */
diff --git a/src/core/surface/channel_connectivity.c b/src/core/surface/channel_connectivity.c
index 2dd4fce26b29050f46ba7b531516a87807c9201d..18267939ede4e434eded32bf814093b77a31f89c 100644
--- a/src/core/surface/channel_connectivity.c
+++ b/src/core/surface/channel_connectivity.c
@@ -37,7 +37,6 @@
 #include <grpc/support/log.h>
 
 #include "src/core/channel/client_channel.h"
-#include "src/core/channel/client_uchannel.h"
 #include "src/core/iomgr/timer.h"
 #include "src/core/surface/api_trace.h"
 #include "src/core/surface/completion_queue.h"
@@ -58,12 +57,6 @@ grpc_connectivity_state grpc_channel_check_connectivity_state(
     grpc_exec_ctx_finish(&exec_ctx);
     return state;
   }
-  if (client_channel_elem->filter == &grpc_client_uchannel_filter) {
-    state = grpc_client_uchannel_check_connectivity_state(
-        &exec_ctx, client_channel_elem, try_to_connect);
-    grpc_exec_ctx_finish(&exec_ctx);
-    return state;
-  }
   gpr_log(GPR_ERROR,
           "grpc_channel_check_connectivity_state called on something that is "
           "not a (u)client channel, but '%s'",
@@ -98,9 +91,6 @@ static void delete_state_watcher(grpc_exec_ctx *exec_ctx, state_watcher *w) {
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
     GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, w->channel,
                                 "watch_channel_connectivity");
-  } else if (client_channel_elem->filter == &grpc_client_uchannel_filter) {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, w->channel,
-                                "watch_uchannel_connectivity");
   } else {
     abort();
   }
@@ -209,11 +199,8 @@ void grpc_channel_watch_connectivity_state(
     grpc_client_channel_watch_connectivity_state(&exec_ctx, client_channel_elem,
                                                  grpc_cq_pollset(cq), &w->state,
                                                  &w->on_complete);
-  } else if (client_channel_elem->filter == &grpc_client_uchannel_filter) {
-    GRPC_CHANNEL_INTERNAL_REF(channel, "watch_uchannel_connectivity");
-    grpc_client_uchannel_watch_connectivity_state(
-        &exec_ctx, client_channel_elem, grpc_cq_pollset(cq), &w->state,
-        &w->on_complete);
+  } else {
+    abort();
   }
 
   grpc_exec_ctx_finish(&exec_ctx);
diff --git a/src/core/surface/channel_create.c b/src/core/surface/channel_create.c
index fd7e20e9cce3ae9eb861e26af8d4b3e6ac88867f..123447c8ed57c80f5525623721f2160e980cb47d 100644
--- a/src/core/surface/channel_create.c
+++ b/src/core/surface/channel_create.c
@@ -105,9 +105,6 @@ static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
                                         0);
     GPR_ASSERT(c->result->transport);
     c->result->channel_args = c->args.channel_args;
-    c->result->filters = gpr_malloc(sizeof(grpc_channel_filter *));
-    c->result->filters[0] = &grpc_http_client_filter;
-    c->result->num_filters = 1;
   } else {
     memset(c->result, 0, sizeof(*c->result));
   }
@@ -190,25 +187,16 @@ grpc_channel *grpc_insecure_channel_create(const char *target,
                                            const grpc_channel_args *args,
                                            void *reserved) {
   grpc_channel *channel = NULL;
-#define MAX_FILTERS 3
-  const grpc_channel_filter *filters[MAX_FILTERS];
   grpc_resolver *resolver;
   subchannel_factory *f;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  size_t n = 0;
   GRPC_API_TRACE(
       "grpc_insecure_channel_create(target=%p, args=%p, reserved=%p)", 3,
       (target, args, reserved));
   GPR_ASSERT(!reserved);
-  if (grpc_channel_args_is_census_enabled(args)) {
-    filters[n++] = &grpc_client_census_filter;
-  }
-  filters[n++] = &grpc_compress_filter;
-  filters[n++] = &grpc_client_channel_filter;
-  GPR_ASSERT(n <= MAX_FILTERS);
 
   channel =
-      grpc_channel_create_from_filters(&exec_ctx, target, filters, n, args, 1);
+      grpc_channel_create(&exec_ctx, target, args, GRPC_CLIENT_CHANNEL, NULL);
 
   f = gpr_malloc(sizeof(*f));
   f->base.vtable = &subchannel_factory_vtable;
diff --git a/src/core/surface/channel_init.c b/src/core/surface/channel_init.c
new file mode 100644
index 0000000000000000000000000000000000000000..ac962f3972cd6cabf8aa0ed9a38d443de0b4257c
--- /dev/null
+++ b/src/core/surface/channel_init.c
@@ -0,0 +1,146 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/surface/channel_init.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/useful.h>
+
+typedef struct stage_slot {
+  grpc_channel_init_stage fn;
+  void *arg;
+  int priority;
+  size_t insertion_order;
+} stage_slot;
+
+typedef struct stage_slots {
+  stage_slot *slots;
+  size_t num_slots;
+  size_t cap_slots;
+} stage_slots;
+
+static stage_slots g_slots[GRPC_NUM_CHANNEL_STACK_TYPES];
+static bool g_finalized;
+
+void grpc_channel_init_init(void) {
+  for (int i = 0; i < GRPC_NUM_CHANNEL_STACK_TYPES; i++) {
+    g_slots[i].slots = NULL;
+    g_slots[i].num_slots = 0;
+    g_slots[i].cap_slots = 0;
+  }
+  g_finalized = false;
+}
+
+void grpc_channel_init_register_stage(grpc_channel_stack_type type,
+                                      int priority,
+                                      grpc_channel_init_stage stage,
+                                      void *stage_arg) {
+  GPR_ASSERT(!g_finalized);
+  if (g_slots[type].cap_slots == g_slots[type].num_slots) {
+    g_slots[type].cap_slots = GPR_MAX(8, 3 * g_slots[type].cap_slots / 2);
+    g_slots[type].slots =
+        gpr_realloc(g_slots[type].slots,
+                    g_slots[type].cap_slots * sizeof(*g_slots[type].slots));
+  }
+  stage_slot *s = &g_slots[type].slots[g_slots[type].num_slots++];
+  s->insertion_order = g_slots[type].num_slots;
+  s->priority = priority;
+  s->fn = stage;
+  s->arg = stage_arg;
+}
+
+static int compare_slots(const void *a, const void *b) {
+  const stage_slot *sa = a;
+  const stage_slot *sb = b;
+
+  int c = GPR_ICMP(sa->priority, sb->priority);
+  if (c != 0) return c;
+  return GPR_ICMP(sa->insertion_order, sb->insertion_order);
+}
+
+void grpc_channel_init_finalize(void) {
+  GPR_ASSERT(!g_finalized);
+  for (int i = 0; i < GRPC_NUM_CHANNEL_STACK_TYPES; i++) {
+    qsort(g_slots[i].slots, g_slots[i].num_slots, sizeof(*g_slots[i].slots),
+          compare_slots);
+  }
+  g_finalized = true;
+}
+
+void grpc_channel_init_shutdown(void) {
+  for (int i = 0; i < GRPC_NUM_CHANNEL_STACK_TYPES; i++) {
+    gpr_free(g_slots[i].slots);
+    g_slots[i].slots = (void *)(uintptr_t)0xdeadbeef;
+  }
+}
+
+static const char *name_for_type(grpc_channel_stack_type type) {
+  switch (type) {
+    case GRPC_CLIENT_CHANNEL:
+      return "CLIENT_CHANNEL";
+    case GRPC_CLIENT_SUBCHANNEL:
+      return "CLIENT_SUBCHANNEL";
+    case GRPC_SERVER_CHANNEL:
+      return "SERVER_CHANNEL";
+    case GRPC_CLIENT_LAME_CHANNEL:
+      return "CLIENT_LAME_CHANNEL";
+    case GRPC_CLIENT_DIRECT_CHANNEL:
+      return "CLIENT_DIRECT_CHANNEL";
+    case GRPC_NUM_CHANNEL_STACK_TYPES:
+      break;
+  }
+  GPR_UNREACHABLE_CODE(return "UNKNOWN");
+}
+
+void *grpc_channel_init_create_stack(
+    grpc_exec_ctx *exec_ctx, grpc_channel_stack_type type, size_t prefix_bytes,
+    const grpc_channel_args *args, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, grpc_transport *transport) {
+  GPR_ASSERT(g_finalized);
+
+  grpc_channel_stack_builder *builder = grpc_channel_stack_builder_create();
+  grpc_channel_stack_builder_set_name(builder, name_for_type(type));
+  grpc_channel_stack_builder_set_channel_arguments(builder, args);
+  grpc_channel_stack_builder_set_transport(builder, transport);
+
+  for (size_t i = 0; i < g_slots[type].num_slots; i++) {
+    const stage_slot *slot = &g_slots[type].slots[i];
+    if (!slot->fn(builder, slot->arg)) {
+      grpc_channel_stack_builder_destroy(builder);
+      return NULL;
+    }
+  }
+
+  return grpc_channel_stack_builder_finish(exec_ctx, builder, prefix_bytes,
+                                           initial_refs, destroy, destroy_arg);
+}
diff --git a/src/core/surface/channel_init.h b/src/core/surface/channel_init.h
new file mode 100644
index 0000000000000000000000000000000000000000..06faef6ddb5e3423b1cea835382ebf5c2bf43bbd
--- /dev/null
+++ b/src/core/surface/channel_init.h
@@ -0,0 +1,86 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_SURFACE_CHANNEL_INIT_H
+#define GRPC_CORE_SURFACE_CHANNEL_INIT_H
+
+#include "src/core/channel/channel_stack_builder.h"
+#include "src/core/surface/channel_stack_type.h"
+#include "src/core/transport/transport.h"
+
+/// This module provides a way for plugins (and the grpc core library itself)
+/// to register mutators for channel stacks.
+/// It also provides a universal entry path to run those mutators to build
+/// a channel stack for various subsystems.
+
+/// One stage of mutation: call functions against \a builder to influence the
+/// finally constructed channel stack
+typedef bool (*grpc_channel_init_stage)(grpc_channel_stack_builder *builder,
+                                        void *arg);
+
+/// Global initialization of the system
+void grpc_channel_init_init(void);
+
+/// Register one stage of mutators.
+/// Stages are run in priority order (lowest to highest), and then in
+/// registration order (in the case of a tie).
+/// Stages are registered against one of the pre-determined channel stack
+/// types.
+void grpc_channel_init_register_stage(grpc_channel_stack_type type,
+                                      int priority,
+                                      grpc_channel_init_stage stage_fn,
+                                      void *stage_arg);
+
+/// Finalize registration. No more calls to grpc_channel_init_register_stage are
+/// allowed.
+void grpc_channel_init_finalize(void);
+/// Shutdown the channel init system
+void grpc_channel_init_shutdown(void);
+
+/// Construct a channel stack of some sort: see channel_stack.h for details
+/// \a type is the type of channel stack to create
+/// \a prefix_bytes is the number of bytes before the channel stack to allocate
+/// \a args are configuration arguments for the channel stack
+/// \a initial_refs is the initial refcount to give the channel stack
+/// \a destroy and \a destroy_arg specify how to destroy the channel stack
+///    if destroy_arg is NULL, the returned value from this function will be
+///    substituted
+/// \a optional_transport is either NULL or a constructed transport object
+/// Returns a pointer to the base of the memory allocated (the actual channel
+/// stack object will be prefix_bytes past that pointer)
+void *grpc_channel_init_create_stack(
+    grpc_exec_ctx *exec_ctx, grpc_channel_stack_type type, size_t prefix_bytes,
+    const grpc_channel_args *args, int initial_refs, grpc_iomgr_cb_func destroy,
+    void *destroy_arg, grpc_transport *optional_transport);
+
+#endif /* GRPC_CORE_SURFACE_CHANNEL_INIT_H */
diff --git a/src/core/httpcli/parser.h b/src/core/surface/channel_stack_type.c
similarity index 64%
rename from src/core/httpcli/parser.h
rename to src/core/surface/channel_stack_type.c
index cd0383637fff9e461741402e215036d7ac037826..29bb7704f83aea34b2851803134ba20e0c592e7c 100644
--- a/src/core/httpcli/parser.h
+++ b/src/core/surface/channel_stack_type.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,34 +31,24 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_HTTPCLI_PARSER_H
-#define GRPC_INTERNAL_CORE_HTTPCLI_PARSER_H
-
-#include "src/core/httpcli/httpcli.h"
 #include <grpc/support/port_platform.h>
-#include <grpc/support/slice.h>
-
-typedef enum {
-  GRPC_HTTPCLI_INITIAL_RESPONSE,
-  GRPC_HTTPCLI_HEADERS,
-  GRPC_HTTPCLI_BODY
-} grpc_httpcli_parser_state;
-
-typedef struct {
-  grpc_httpcli_parser_state state;
-
-  grpc_httpcli_response r;
-  size_t body_capacity;
-  size_t hdr_capacity;
-
-  uint8_t cur_line[GRPC_HTTPCLI_MAX_HEADER_LENGTH];
-  size_t cur_line_length;
-} grpc_httpcli_parser;
-
-void grpc_httpcli_parser_init(grpc_httpcli_parser* parser);
-void grpc_httpcli_parser_destroy(grpc_httpcli_parser* parser);
-
-int grpc_httpcli_parser_parse(grpc_httpcli_parser* parser, gpr_slice slice);
-int grpc_httpcli_parser_eof(grpc_httpcli_parser* parser);
-
-#endif /* GRPC_INTERNAL_CORE_HTTPCLI_PARSER_H */
+#include "src/core/surface/channel_stack_type.h"
+#include <grpc/support/log.h>
+
+bool grpc_channel_stack_type_is_client(grpc_channel_stack_type type) {
+  switch (type) {
+    case GRPC_CLIENT_CHANNEL:
+      return true;
+    case GRPC_CLIENT_SUBCHANNEL:
+      return true;
+    case GRPC_CLIENT_LAME_CHANNEL:
+      return true;
+    case GRPC_CLIENT_DIRECT_CHANNEL:
+      return true;
+    case GRPC_SERVER_CHANNEL:
+      return false;
+    case GRPC_NUM_CHANNEL_STACK_TYPES:
+      break;
+  }
+  GPR_UNREACHABLE_CODE(return true;);
+}
diff --git a/src/core/surface/channel_stack_type.h b/src/core/surface/channel_stack_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..75a1b9c072a24378a2c9c896e509a9b3e6f2a175
--- /dev/null
+++ b/src/core/surface/channel_stack_type.h
@@ -0,0 +1,58 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_SURFACE_CHANNEL_STACK_TYPE_H
+#define GRPC_CORE_SURFACE_CHANNEL_STACK_TYPE_H
+
+#include <stdbool.h>
+
+typedef enum {
+  // normal top-half client channel with load-balancing, connection management
+  GRPC_CLIENT_CHANNEL,
+  // bottom-half of a client channel: everything that happens post-load
+  // balancing (bound to a specific transport)
+  GRPC_CLIENT_SUBCHANNEL,
+  // a permanently broken client channel
+  GRPC_CLIENT_LAME_CHANNEL,
+  // a directly connected client channel (without load-balancing, directly talks
+  // to a transport)
+  GRPC_CLIENT_DIRECT_CHANNEL,
+  // server side channel
+  GRPC_SERVER_CHANNEL,
+  // must be last
+  GRPC_NUM_CHANNEL_STACK_TYPES
+} grpc_channel_stack_type;
+
+bool grpc_channel_stack_type_is_client(grpc_channel_stack_type type);
+
+#endif /* GRPC_CORE_SURFACE_CHANNEL_STACK_TYPE_H */
diff --git a/src/core/surface/completion_queue.h b/src/core/surface/completion_queue.h
index 27ef90f2d58a5027e65983332f85c26a504ac7b9..07f6d0c8f6c48ac6bfc971f20ebc8b471cd4d1cb 100644
--- a/src/core/surface/completion_queue.h
+++ b/src/core/surface/completion_queue.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_COMPLETION_QUEUE_H
-#define GRPC_INTERNAL_CORE_SURFACE_COMPLETION_QUEUE_H
+#ifndef GRPC_CORE_SURFACE_COMPLETION_QUEUE_H
+#define GRPC_CORE_SURFACE_COMPLETION_QUEUE_H
 
 /* Internal API for completion queues */
 
@@ -88,4 +88,4 @@ int grpc_cq_is_server_cq(grpc_completion_queue *cc);
 void grpc_cq_global_init(void);
 void grpc_cq_global_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_COMPLETION_QUEUE_H */
+#endif /* GRPC_CORE_SURFACE_COMPLETION_QUEUE_H */
diff --git a/src/core/surface/event_string.h b/src/core/surface/event_string.h
index 07c474e3a021a4a42ef976692ce13258fcb7a572..d0598ceccaed6f422a5489abc01cf3c6e01c94a0 100644
--- a/src/core/surface/event_string.h
+++ b/src/core/surface/event_string.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_EVENT_STRING_H
-#define GRPC_INTERNAL_CORE_SURFACE_EVENT_STRING_H
+#ifndef GRPC_CORE_SURFACE_EVENT_STRING_H
+#define GRPC_CORE_SURFACE_EVENT_STRING_H
 
 #include <grpc/grpc.h>
 
 /* Returns a string describing an event. Must be later freed with gpr_free() */
 char *grpc_event_string(grpc_event *ev);
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_EVENT_STRING_H */
+#endif /* GRPC_CORE_SURFACE_EVENT_STRING_H */
diff --git a/src/core/surface/init.c b/src/core/surface/init.c
index a4a53d3ec1a321f4a75b6b607d66ec32091437c0..2ce50a0d82727f1105391628f543c4fbfa607597 100644
--- a/src/core/surface/init.c
+++ b/src/core/surface/init.c
@@ -33,13 +33,20 @@
 
 #include <grpc/support/port_platform.h>
 
+#include <limits.h>
 #include <memory.h>
 
-#include <grpc/census.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/time.h>
+/* TODO(ctiller): find another way? - better not to include census here */
+#include "src/core/census/grpc_plugin.h"
 #include "src/core/channel/channel_stack.h"
+#include "src/core/channel/compress_filter.h"
+#include "src/core/channel/connected_channel.h"
+#include "src/core/channel/client_channel.h"
+#include "src/core/channel/http_client_filter.h"
+#include "src/core/channel/http_server_filter.h"
 #include "src/core/client_config/lb_policy_registry.h"
 #include "src/core/client_config/lb_policies/pick_first.h"
 #include "src/core/client_config/lb_policies/round_robin.h"
@@ -54,11 +61,15 @@
 #include "src/core/profiling/timers.h"
 #include "src/core/surface/api_trace.h"
 #include "src/core/surface/call.h"
+#include "src/core/surface/channel_init.h"
 #include "src/core/surface/completion_queue.h"
 #include "src/core/surface/init.h"
+#include "src/core/surface/lame_client.h"
+#include "src/core/surface/server.h"
 #include "src/core/surface/surface_trace.h"
 #include "src/core/transport/chttp2_transport.h"
 #include "src/core/transport/connectivity_state.h"
+#include "src/core/transport/transport_impl.h"
 
 #ifndef GRPC_DEFAULT_NAME_PREFIX
 #define GRPC_DEFAULT_NAME_PREFIX "dns:///"
@@ -72,9 +83,59 @@ static int g_initializations;
 
 static void do_basic_init(void) {
   gpr_mu_init(&g_init_mu);
+  /* TODO(ctiller): ideally remove this strict linkage */
+  grpc_register_plugin(census_grpc_plugin_init, census_grpc_plugin_destroy);
   g_initializations = 0;
 }
 
+static bool append_filter(grpc_channel_stack_builder *builder, void *arg) {
+  return grpc_channel_stack_builder_append_filter(builder, arg, NULL, NULL);
+}
+
+static bool prepend_filter(grpc_channel_stack_builder *builder, void *arg) {
+  return grpc_channel_stack_builder_prepend_filter(builder, arg, NULL, NULL);
+}
+
+static bool maybe_add_http_filter(grpc_channel_stack_builder *builder,
+                                  void *arg) {
+  grpc_transport *t = grpc_channel_stack_builder_get_transport(builder);
+  if (t && strstr(t->vtable->name, "http")) {
+    return grpc_channel_stack_builder_prepend_filter(builder, arg, NULL, NULL);
+  }
+  return true;
+}
+
+static void register_builtin_channel_init() {
+  grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, prepend_filter,
+                                   (void *)&grpc_compress_filter);
+  grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, INT_MAX,
+                                   prepend_filter,
+                                   (void *)&grpc_compress_filter);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX, prepend_filter,
+                                   (void *)&grpc_compress_filter);
+  grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL, INT_MAX,
+                                   maybe_add_http_filter,
+                                   (void *)&grpc_http_client_filter);
+  grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL, INT_MAX,
+                                   grpc_add_connected_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, INT_MAX,
+                                   maybe_add_http_filter,
+                                   (void *)&grpc_http_client_filter);
+  grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, INT_MAX,
+                                   grpc_add_connected_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
+                                   maybe_add_http_filter,
+                                   (void *)&grpc_http_server_filter);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
+                                   grpc_add_connected_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_CLIENT_CHANNEL, INT_MAX, append_filter,
+                                   (void *)&grpc_client_channel_filter);
+  grpc_channel_init_register_stage(GRPC_CLIENT_LAME_CHANNEL, INT_MAX,
+                                   append_filter, (void *)&grpc_lame_filter);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX, prepend_filter,
+                                   (void *)&grpc_server_top_filter);
+}
+
 typedef struct grpc_plugin {
   void (*init)();
   void (*destroy)();
@@ -85,7 +146,7 @@ static int g_number_of_plugins = 0;
 
 void grpc_register_plugin(void (*init)(void), void (*destroy)(void)) {
   GRPC_API_TRACE("grpc_register_plugin(init=%p, destroy=%p)", 2,
-                 ((void*)(intptr_t)init, (void*)(intptr_t)destroy));
+                 ((void *)(intptr_t)init, (void *)(intptr_t)destroy));
   GPR_ASSERT(g_number_of_plugins != MAX_PLUGINS);
   g_all_of_the_plugins[g_number_of_plugins].init = init;
   g_all_of_the_plugins[g_number_of_plugins].destroy = destroy;
@@ -100,6 +161,7 @@ void grpc_init(void) {
   if (++g_initializations == 1) {
     gpr_time_init();
     grpc_mdctx_global_init();
+    grpc_channel_init_init();
     grpc_lb_policy_registry_init(grpc_pick_first_lb_factory_create());
     grpc_register_lb_policy(grpc_pick_first_lb_factory_create());
     grpc_register_lb_policy(grpc_round_robin_lb_factory_create());
@@ -115,18 +177,12 @@ void grpc_init(void) {
     grpc_register_tracer("http", &grpc_http_trace);
     grpc_register_tracer("flowctl", &grpc_flowctl_trace);
     grpc_register_tracer("connectivity_state", &grpc_connectivity_state_trace);
+    grpc_register_tracer("channel_stack_builder",
+                         &grpc_trace_channel_stack_builder);
     grpc_security_pre_init();
     grpc_iomgr_init();
     grpc_executor_init();
     grpc_tracer_init("GRPC_TRACE");
-    /* Only initialize census if no one else has and some features are
-     * available. */
-    if (census_enabled() == CENSUS_FEATURE_NONE &&
-        census_supported() != CENSUS_FEATURE_NONE) {
-      if (census_initialize(census_supported())) { /* enable all features. */
-        gpr_log(GPR_ERROR, "Could not initialize census.");
-      }
-    }
     gpr_timers_global_init();
     grpc_cq_global_init();
     grpc_subchannel_index_init();
@@ -135,6 +191,12 @@ void grpc_init(void) {
         g_all_of_the_plugins[i].init();
       }
     }
+    /* register channel finalization AFTER all plugins, to ensure that it's run
+     * at the appropriate time */
+    grpc_register_security_filters();
+    register_builtin_channel_init();
+    /* no more changes to channel init pipelines */
+    grpc_channel_init_finalize();
   }
   gpr_mu_unlock(&g_init_mu);
   GRPC_API_TRACE("grpc_init(void)", 0, ());
@@ -149,7 +211,6 @@ void grpc_shutdown(void) {
     grpc_cq_global_shutdown();
     grpc_iomgr_shutdown();
     grpc_subchannel_index_shutdown();
-    census_shutdown();
     gpr_timers_global_destroy();
     grpc_tracer_shutdown();
     grpc_resolver_registry_shutdown();
@@ -159,6 +220,7 @@ void grpc_shutdown(void) {
         g_all_of_the_plugins[i].destroy();
       }
     }
+    grpc_channel_init_shutdown();
     grpc_mdctx_global_shutdown();
   }
   gpr_mu_unlock(&g_init_mu);
diff --git a/src/core/surface/init.h b/src/core/surface/init.h
index 771c30f41257848118b5faf2dce2e07230f73a38..5e358c7022aba65b5148fbdc367d70401bdf70d6 100644
--- a/src/core/surface/init.h
+++ b/src/core/surface/init.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,10 +31,11 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_INIT_H
-#define GRPC_INTERNAL_CORE_SURFACE_INIT_H
+#ifndef GRPC_CORE_SURFACE_INIT_H
+#define GRPC_CORE_SURFACE_INIT_H
 
+void grpc_register_security_filters(void);
 void grpc_security_pre_init(void);
 int grpc_is_initialized(void);
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_INIT_H */
+#endif /* GRPC_CORE_SURFACE_INIT_H */
diff --git a/src/core/surface/init_secure.c b/src/core/surface/init_secure.c
index fa20e91583c996e70df68b33a118e319174e6407..311dda9864da4362e7e33611602e86fd7fbe11b1 100644
--- a/src/core/surface/init_secure.c
+++ b/src/core/surface/init_secure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,11 +32,58 @@
  */
 
 #include "src/core/surface/init.h"
+
+#include <limits.h>
+#include <string.h>
+
+#include "src/core/surface/channel_init.h"
 #include "src/core/debug/trace.h"
+#include "src/core/security/auth_filters.h"
+#include "src/core/security/credentials.h"
 #include "src/core/security/secure_endpoint.h"
+#include "src/core/security/security_connector.h"
 #include "src/core/tsi/transport_security_interface.h"
 
 void grpc_security_pre_init(void) {
   grpc_register_tracer("secure_endpoint", &grpc_trace_secure_endpoint);
   grpc_register_tracer("transport_security", &tsi_tracing_enabled);
 }
+
+static bool maybe_prepend_client_auth_filter(
+    grpc_channel_stack_builder *builder, void *arg) {
+  const grpc_channel_args *args =
+      grpc_channel_stack_builder_get_channel_arguments(builder);
+  if (args) {
+    for (size_t i = 0; i < args->num_args; i++) {
+      if (0 == strcmp(GRPC_SECURITY_CONNECTOR_ARG, args->args[i].key)) {
+        return grpc_channel_stack_builder_prepend_filter(
+            builder, &grpc_client_auth_filter, NULL, NULL);
+      }
+    }
+  }
+  return true;
+}
+
+static bool maybe_prepend_server_auth_filter(
+    grpc_channel_stack_builder *builder, void *arg) {
+  const grpc_channel_args *args =
+      grpc_channel_stack_builder_get_channel_arguments(builder);
+  if (args) {
+    for (size_t i = 0; i < args->num_args; i++) {
+      if (0 == strcmp(GRPC_SERVER_CREDENTIALS_ARG, args->args[i].key)) {
+        return grpc_channel_stack_builder_prepend_filter(
+            builder, &grpc_server_auth_filter, NULL, NULL);
+      }
+    }
+  }
+  return true;
+}
+
+void grpc_register_security_filters(void) {
+  grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL, INT_MAX,
+                                   maybe_prepend_client_auth_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, INT_MAX,
+                                   maybe_prepend_client_auth_filter, NULL);
+  grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
+                                   maybe_prepend_server_auth_filter, NULL);
+}
diff --git a/src/core/surface/init_unsecure.c b/src/core/surface/init_unsecure.c
index 630d564a7d849c4bb6b2f57fc582e4704dd2e356..278fcc83ace9f6aff669e53b4d78f0615ab3f2f6 100644
--- a/src/core/surface/init_unsecure.c
+++ b/src/core/surface/init_unsecure.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,3 +34,5 @@
 #include "src/core/surface/init.h"
 
 void grpc_security_pre_init(void) {}
+
+void grpc_register_security_filters(void) {}
diff --git a/src/core/surface/lame_client.c b/src/core/surface/lame_client.c
index 537069e9848c087d18969d6022ffc9545531f611..58f89946d226b0776b8144eb1fbd74c60b6c7391 100644
--- a/src/core/surface/lame_client.c
+++ b/src/core/surface/lame_client.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include "src/core/surface/lame_client.h"
+
 #include <grpc/grpc.h>
 
 #include <string.h>
@@ -115,7 +117,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
                                  grpc_channel_element *elem) {}
 
-static const grpc_channel_filter lame_filter = {
+const grpc_channel_filter grpc_lame_filter = {
     lame_start_transport_stream_op, lame_start_transport_op, sizeof(call_data),
     init_call_elem, grpc_call_stack_ignore_set_pollset, destroy_call_elem,
     sizeof(channel_data), init_channel_elem, destroy_channel_elem,
@@ -127,19 +129,17 @@ static const grpc_channel_filter lame_filter = {
 grpc_channel *grpc_lame_client_channel_create(const char *target,
                                               grpc_status_code error_code,
                                               const char *error_message) {
-  grpc_channel *channel;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_channel_element *elem;
   channel_data *chand;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  static const grpc_channel_filter *filters[] = {&lame_filter};
-  channel =
-      grpc_channel_create_from_filters(&exec_ctx, target, filters, 1, NULL, 1);
+  grpc_channel *channel = grpc_channel_create(&exec_ctx, target, NULL,
+                                              GRPC_CLIENT_LAME_CHANNEL, NULL);
   elem = grpc_channel_stack_element(grpc_channel_get_channel_stack(channel), 0);
   GRPC_API_TRACE(
       "grpc_lame_client_channel_create(target=%s, error_code=%d, "
       "error_message=%s)",
       3, (target, (int)error_code, error_message));
-  GPR_ASSERT(elem->filter == &lame_filter);
+  GPR_ASSERT(elem->filter == &grpc_lame_filter);
   chand = (channel_data *)elem->channel_data;
   chand->error_code = error_code;
   chand->error_message = error_message;
diff --git a/src/core/channel/client_uchannel.h b/src/core/surface/lame_client.h
similarity index 57%
rename from src/core/channel/client_uchannel.h
rename to src/core/surface/lame_client.h
index 92a831493cfbf7625850c3da82b930bcc72ac01e..3f3abd2ffe72d82f8dda13366042799aedef21f8 100644
--- a/src/core/channel/client_uchannel.h
+++ b/src/core/surface/lame_client.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,30 +31,11 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHANNEL_CLIENT_MICROCHANNEL_H
-#define GRPC_INTERNAL_CORE_CHANNEL_CLIENT_MICROCHANNEL_H
+#ifndef GRPC_CORE_SURFACE_LAME_CLIENT_H
+#define GRPC_CORE_SURFACE_LAME_CLIENT_H
 
 #include "src/core/channel/channel_stack.h"
-#include "src/core/client_config/resolver.h"
 
-#define GRPC_MICROCHANNEL_SUBCHANNEL_ARG "grpc.microchannel_subchannel_key"
+extern const grpc_channel_filter grpc_lame_filter;
 
-/* A client microchannel (aka uchannel) is a channel wrapping a subchannel, for
- * the purposes of lightweight RPC communications from within the core.*/
-
-extern const grpc_channel_filter grpc_client_uchannel_filter;
-
-grpc_connectivity_state grpc_client_uchannel_check_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect);
-
-void grpc_client_uchannel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
-    grpc_connectivity_state *state, grpc_closure *on_complete);
-
-grpc_channel *grpc_client_uchannel_create(grpc_subchannel *subchannel,
-                                          grpc_channel_args *args);
-
-void grpc_client_uchannel_set_connected_subchannel(
-    grpc_channel *uchannel, grpc_connected_subchannel *connected_subchannel);
-
-#endif /* GRPC_INTERNAL_CORE_CHANNEL_CLIENT_MICROCHANNEL_H */
+#endif /* GRPC_CORE_SURFACE_LAME_CLIENT_H */
diff --git a/src/core/surface/secure_channel_create.c b/src/core/surface/secure_channel_create.c
index aadfac4c91f6367b18177696399ec41649f7061a..cc752227ee796b7f9670fa56a8a1504952cefb9f 100644
--- a/src/core/surface/secure_channel_create.c
+++ b/src/core/surface/secure_channel_create.c
@@ -40,11 +40,8 @@
 #include <grpc/support/slice.h>
 #include <grpc/support/slice_buffer.h>
 
-#include "src/core/census/grpc_filter.h"
 #include "src/core/channel/channel_args.h"
 #include "src/core/channel/client_channel.h"
-#include "src/core/channel/compress_filter.h"
-#include "src/core/channel/http_client_filter.h"
 #include "src/core/client_config/resolver_registry.h"
 #include "src/core/iomgr/tcp_client.h"
 #include "src/core/security/auth_filters.h"
@@ -115,10 +112,6 @@ static void on_secure_handshake_done(grpc_exec_ctx *exec_ctx, void *arg,
     args_copy = grpc_channel_args_copy_and_add(c->args.channel_args,
                                                &auth_context_arg, 1);
     c->result->channel_args = args_copy;
-    c->result->filters = gpr_malloc(sizeof(grpc_channel_filter *) * 2);
-    c->result->filters[0] = &grpc_http_client_filter;
-    c->result->filters[1] = &grpc_client_auth_filter;
-    c->result->num_filters = 2;
   }
   notify = c->notify;
   c->notify = NULL;
@@ -262,10 +255,7 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
   grpc_channel_security_connector *security_connector;
   grpc_resolver *resolver;
   subchannel_factory *f;
-#define MAX_FILTERS 3
-  const grpc_channel_filter *filters[MAX_FILTERS];
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  size_t n = 0;
 
   GRPC_API_TRACE(
       "grpc_secure_channel_create(creds=%p, target=%s, args=%p, "
@@ -294,15 +284,9 @@ grpc_channel *grpc_secure_channel_create(grpc_channel_credentials *creds,
   args_copy = grpc_channel_args_copy_and_add(
       new_args_from_connector != NULL ? new_args_from_connector : args,
       &connector_arg, 1);
-  if (grpc_channel_args_is_census_enabled(args)) {
-    filters[n++] = &grpc_client_census_filter;
-  }
-  filters[n++] = &grpc_compress_filter;
-  filters[n++] = &grpc_client_channel_filter;
-  GPR_ASSERT(n <= MAX_FILTERS);
 
-  channel = grpc_channel_create_from_filters(&exec_ctx, target, filters, n,
-                                             args_copy, 1);
+  channel = grpc_channel_create(&exec_ctx, target, args_copy,
+                                GRPC_CLIENT_CHANNEL, NULL);
 
   f = gpr_malloc(sizeof(*f));
   f->base.vtable = &subchannel_factory_vtable;
diff --git a/src/core/surface/server.c b/src/core/surface/server.c
index 5b13d4ba526dc84fd070097704c9bbaef7ec9bbb..da93474b26183f6b2c547396ecefdfb107724225 100644
--- a/src/core/surface/server.c
+++ b/src/core/surface/server.c
@@ -42,7 +42,6 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
-#include "src/core/census/grpc_filter.h"
 #include "src/core/channel/channel_args.h"
 #include "src/core/channel/connected_channel.h"
 #include "src/core/iomgr/iomgr.h"
@@ -182,8 +181,6 @@ typedef struct {
 } channel_broadcaster;
 
 struct grpc_server {
-  size_t channel_filter_count;
-  grpc_channel_filter const **channel_filters;
   grpc_channel_args *channel_args;
 
   grpc_completion_queue **cqs;
@@ -355,7 +352,6 @@ static void server_delete(grpc_exec_ctx *exec_ctx, grpc_server *server) {
   grpc_channel_args_destroy(server->channel_args);
   gpr_mu_destroy(&server->mu_global);
   gpr_mu_destroy(&server->mu_call);
-  gpr_free((void *)server->channel_filters);
   while ((rm = server->registered_methods) != NULL) {
     server->registered_methods = rm->next;
     request_matcher_destroy(&rm->request_matcher);
@@ -757,7 +753,7 @@ static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
   }
 }
 
-static const grpc_channel_filter server_surface_filter = {
+const grpc_channel_filter grpc_server_top_filter = {
     server_start_transport_stream_op, grpc_channel_next_op, sizeof(call_data),
     init_call_elem, grpc_call_stack_ignore_set_pollset, destroy_call_elem,
     sizeof(channel_data), init_channel_elem, destroy_channel_elem,
@@ -783,11 +779,10 @@ void grpc_server_register_completion_queue(grpc_server *server,
   server->cqs[n] = cq;
 }
 
-grpc_server *grpc_server_create_from_filters(
-    const grpc_channel_filter **filters, size_t filter_count,
-    const grpc_channel_args *args) {
+grpc_server *grpc_server_create(const grpc_channel_args *args, void *reserved) {
   size_t i;
-  int census_enabled = grpc_channel_args_is_census_enabled(args);
+
+  GRPC_API_TRACE("grpc_server_create(%p, %p)", 2, (args, reserved));
 
   grpc_server *server = gpr_malloc(sizeof(grpc_server));
 
@@ -815,23 +810,6 @@ grpc_server *grpc_server_create_from_filters(
   server->requested_calls = gpr_malloc(server->max_requested_calls *
                                        sizeof(*server->requested_calls));
 
-  /* Server filter stack is:
-
-     server_surface_filter - for making surface API calls
-     grpc_server_census_filter (optional) - for stats collection and tracing
-     {passed in filter stack}
-     grpc_connected_channel_filter - for interfacing with transports */
-  server->channel_filter_count = filter_count + 1u + (census_enabled ? 1u : 0u);
-  server->channel_filters =
-      gpr_malloc(server->channel_filter_count * sizeof(grpc_channel_filter *));
-  server->channel_filters[0] = &server_surface_filter;
-  if (census_enabled) {
-    server->channel_filters[1] = &grpc_server_census_filter;
-  }
-  for (i = 0; i < filter_count; i++) {
-    server->channel_filters[i + 1u + (census_enabled ? 1u : 0u)] = filters[i];
-  }
-
   server->channel_args = grpc_channel_args_copy(args);
 
   return server;
@@ -892,12 +870,7 @@ void grpc_server_start(grpc_server *server) {
 
 void grpc_server_setup_transport(grpc_exec_ctx *exec_ctx, grpc_server *s,
                                  grpc_transport *transport,
-                                 grpc_channel_filter const **extra_filters,
-                                 size_t num_extra_filters,
                                  const grpc_channel_args *args) {
-  size_t num_filters = s->channel_filter_count + num_extra_filters + 1;
-  grpc_channel_filter const **filters =
-      gpr_malloc(sizeof(grpc_channel_filter *) * num_filters);
   size_t i;
   size_t num_registered_methods;
   size_t alloc;
@@ -913,22 +886,14 @@ void grpc_server_setup_transport(grpc_exec_ctx *exec_ctx, grpc_server *s,
   uint32_t max_probes = 0;
   grpc_transport_op op;
 
-  for (i = 0; i < s->channel_filter_count; i++) {
-    filters[i] = s->channel_filters[i];
-  }
-  for (; i < s->channel_filter_count + num_extra_filters; i++) {
-    filters[i] = extra_filters[i - s->channel_filter_count];
-  }
-  filters[i] = &grpc_connected_channel_filter;
-
   for (i = 0; i < s->cq_count; i++) {
     memset(&op, 0, sizeof(op));
     op.bind_pollset = grpc_cq_pollset(s->cqs[i]);
     grpc_transport_perform_op(exec_ctx, transport, &op);
   }
 
-  channel = grpc_channel_create_from_filters(exec_ctx, NULL, filters,
-                                             num_filters, args, 0);
+  channel =
+      grpc_channel_create(exec_ctx, NULL, args, GRPC_SERVER_CHANNEL, transport);
   chand = (channel_data *)grpc_channel_stack_element(
               grpc_channel_get_channel_stack(channel), 0)->channel_data;
   chand->server = s;
@@ -965,17 +930,12 @@ void grpc_server_setup_transport(grpc_exec_ctx *exec_ctx, grpc_server *s,
     chand->registered_method_max_probes = max_probes;
   }
 
-  grpc_connected_channel_bind_transport(grpc_channel_get_channel_stack(channel),
-                                        transport);
-
   gpr_mu_lock(&s->mu_global);
   chand->next = &s->root_channel_data;
   chand->prev = chand->next->prev;
   chand->next->prev = chand->prev->next = chand;
   gpr_mu_unlock(&s->mu_global);
 
-  gpr_free((void *)filters);
-
   GRPC_CHANNEL_INTERNAL_REF(channel, "connectivity");
   memset(&op, 0, sizeof(op));
   op.set_accept_stream = true;
diff --git a/src/core/surface/server.h b/src/core/surface/server.h
index a957fdb3605fb9f78958af6f78df442baedfb543..cd62eadd7f787a36e46c1da278bc7c153566f72f 100644
--- a/src/core/surface/server.h
+++ b/src/core/surface/server.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,17 +31,14 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_SERVER_H
-#define GRPC_INTERNAL_CORE_SURFACE_SERVER_H
+#ifndef GRPC_CORE_SURFACE_SERVER_H
+#define GRPC_CORE_SURFACE_SERVER_H
 
-#include "src/core/channel/channel_stack.h"
 #include <grpc/grpc.h>
+#include "src/core/channel/channel_stack.h"
 #include "src/core/transport/transport.h"
 
-/* Create a server */
-grpc_server *grpc_server_create_from_filters(
-    const grpc_channel_filter **filters, size_t filter_count,
-    const grpc_channel_args *args);
+extern const grpc_channel_filter grpc_server_top_filter;
 
 /* Add a listener to the server: when the server starts, it will call start,
    and when it shuts down, it will call destroy */
@@ -56,12 +53,10 @@ void grpc_server_add_listener(
    server */
 void grpc_server_setup_transport(grpc_exec_ctx *exec_ctx, grpc_server *server,
                                  grpc_transport *transport,
-                                 grpc_channel_filter const **extra_filters,
-                                 size_t num_extra_filters,
                                  const grpc_channel_args *args);
 
 const grpc_channel_args *grpc_server_get_channel_args(grpc_server *server);
 
 int grpc_server_has_open_connections(grpc_server *server);
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_SERVER_H */
+#endif /* GRPC_CORE_SURFACE_SERVER_H */
diff --git a/src/core/surface/server_chttp2.c b/src/core/surface/server_chttp2.c
index ce970dfe7370ebd3a3c73a0494045e491aa5caf0..ff2840f6556db59616fcbb5e9646cd62f917d88b 100644
--- a/src/core/surface/server_chttp2.c
+++ b/src/core/surface/server_chttp2.c
@@ -45,10 +45,7 @@
 
 static void setup_transport(grpc_exec_ctx *exec_ctx, void *server,
                             grpc_transport *transport) {
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_http_server_filter};
-  grpc_server_setup_transport(exec_ctx, server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters),
+  grpc_server_setup_transport(exec_ctx, server, transport,
                               grpc_server_get_channel_args(server));
 }
 
diff --git a/src/core/surface/surface_trace.h b/src/core/surface/surface_trace.h
index 93b2859ac5b273588b4bf7cbee52ecbda9ea5e3f..ed820ebd053d0a80899280e5017230f9f253a6e1 100644
--- a/src/core/surface/surface_trace.h
+++ b/src/core/surface/surface_trace.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_SURFACE_SURFACE_TRACE_H
-#define GRPC_INTERNAL_CORE_SURFACE_SURFACE_TRACE_H
+#ifndef GRPC_CORE_SURFACE_SURFACE_TRACE_H
+#define GRPC_CORE_SURFACE_SURFACE_TRACE_H
 
 #include "src/core/debug/trace.h"
 #include "src/core/surface/api_trace.h"
@@ -45,4 +45,4 @@
     gpr_free(_ev);                                      \
   }
 
-#endif /* GRPC_INTERNAL_CORE_SURFACE_SURFACE_TRACE_H */
+#endif /* GRPC_CORE_SURFACE_SURFACE_TRACE_H */
diff --git a/src/core/transport/byte_stream.h b/src/core/transport/byte_stream.h
index d2e51e7b45e1da39576bc2268e110f11e8fce126..b8d0ade2b5c32d1884c352707a29698d6b219757 100644
--- a/src/core/transport/byte_stream.h
+++ b/src/core/transport/byte_stream.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_BYTE_STREAM_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_BYTE_STREAM_H
+#ifndef GRPC_CORE_TRANSPORT_BYTE_STREAM_H
+#define GRPC_CORE_TRANSPORT_BYTE_STREAM_H
 
 #include "src/core/iomgr/exec_ctx.h"
 #include <grpc/support/slice_buffer.h>
@@ -86,4 +86,4 @@ void grpc_slice_buffer_stream_init(grpc_slice_buffer_stream *stream,
                                    gpr_slice_buffer *slice_buffer,
                                    uint32_t flags);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_BYTE_STREAM_H */
+#endif /* GRPC_CORE_TRANSPORT_BYTE_STREAM_H */
diff --git a/src/core/transport/chttp2/alpn.h b/src/core/transport/chttp2/alpn.h
index f38b4c3167e0ededf9c4353e4eaf34cfc92af916..68010e3155d6c247cb2361ca1c207f3e030ba54b 100644
--- a/src/core/transport/chttp2/alpn.h
+++ b/src/core/transport/chttp2/alpn.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_ALPN_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_ALPN_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_ALPN_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_ALPN_H
 
 #include <string.h>
 
@@ -46,4 +46,4 @@ size_t grpc_chttp2_num_alpn_versions(void);
  * grpc_chttp2_num_alpn_versions()) */
 const char *grpc_chttp2_get_alpn_version_index(size_t i);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_ALPN_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_ALPN_H */
diff --git a/src/core/transport/chttp2/bin_encoder.h b/src/core/transport/chttp2/bin_encoder.h
index 036fddf9981e103297cc01ae5a7485051a5c2225..edb6f2dad1b15842cf42702af41fb2c541daef0f 100644
--- a/src/core/transport/chttp2/bin_encoder.h
+++ b/src/core/transport/chttp2/bin_encoder.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H
 
 #include <grpc/support/slice.h>
 
@@ -51,4 +51,4 @@ gpr_slice grpc_chttp2_huffman_compress(gpr_slice input);
    return y; */
 gpr_slice grpc_chttp2_base64_encode_and_huffman_compress(gpr_slice input);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H */
diff --git a/src/core/transport/chttp2/frame.h b/src/core/transport/chttp2/frame.h
index 879ee036fac0f7018f01e35c2fcbbf5acf4a4fdc..560a6675af1be1a8db99cb07c563bc825e088942 100644
--- a/src/core/transport/chttp2/frame.h
+++ b/src/core/transport/chttp2/frame.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
@@ -66,4 +66,4 @@ typedef struct grpc_chttp2_transport_parsing grpc_chttp2_transport_parsing;
 #define GRPC_CHTTP2_DATA_FLAG_PADDED 8
 #define GRPC_CHTTP2_FLAG_HAS_PRIORITY 0x20
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_H */
diff --git a/src/core/transport/chttp2/frame_data.h b/src/core/transport/chttp2/frame_data.h
index 936b7a25899cb6e73a0749cc8b61ed2d85e40b3d..92929d5c97302ec247fbfee4730e1d5353a78e5e 100644
--- a/src/core/transport/chttp2/frame_data.h
+++ b/src/core/transport/chttp2/frame_data.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H
 
 /* Parser for GRPC streams embedded in DATA frames */
 
@@ -98,4 +98,4 @@ void grpc_chttp2_encode_data(uint32_t id, gpr_slice_buffer *inbuf,
                              uint32_t write_bytes, int is_eof,
                              gpr_slice_buffer *outbuf);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_DATA_H */
diff --git a/src/core/transport/chttp2/frame_goaway.h b/src/core/transport/chttp2/frame_goaway.h
index e1a72b40134c1d6d6ce9d40edf13a920eca24502..616287e9ee5a98552c367a70b73199766e821c9c 100644
--- a/src/core/transport/chttp2/frame_goaway.h
+++ b/src/core/transport/chttp2/frame_goaway.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H
 
 #include "src/core/iomgr/exec_ctx.h"
 #include "src/core/transport/chttp2/frame.h"
@@ -74,4 +74,4 @@ void grpc_chttp2_goaway_append(uint32_t last_stream_id, uint32_t error_code,
                                gpr_slice debug_data,
                                gpr_slice_buffer *slice_buffer);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_GOAWAY_H */
diff --git a/src/core/transport/chttp2/frame_ping.h b/src/core/transport/chttp2/frame_ping.h
index 16d7a726186a31108b7130d6e9c68b782f815f73..fc4dd7ac58f9d37d9557497c3799872274106c9b 100644
--- a/src/core/transport/chttp2/frame_ping.h
+++ b/src/core/transport/chttp2/frame_ping.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_PING_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_PING_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_PING_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_PING_H
 
 #include "src/core/iomgr/exec_ctx.h"
 #include <grpc/support/slice.h>
@@ -53,4 +53,4 @@ grpc_chttp2_parse_error grpc_chttp2_ping_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_PING_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_PING_H */
diff --git a/src/core/transport/chttp2/frame_rst_stream.h b/src/core/transport/chttp2/frame_rst_stream.h
index 72ca654c3243b5e69720f4c571411e5911c73cc8..d563a22e24018d854cc9d94090ae38d4a51c9a5c 100644
--- a/src/core/transport/chttp2/frame_rst_stream.h
+++ b/src/core/transport/chttp2/frame_rst_stream.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H
 
 #include <grpc/support/slice.h>
 #include "src/core/transport/chttp2/frame.h"
@@ -52,4 +52,4 @@ grpc_chttp2_parse_error grpc_chttp2_rst_stream_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_RST_STREAM_H */
diff --git a/src/core/transport/chttp2/frame_settings.h b/src/core/transport/chttp2/frame_settings.h
index 3c918e3a2a90985489e2ad2910c7ff684455dcf6..e3c10d3cc5bb80a7db50fc4b571712241cdc3124 100644
--- a/src/core/transport/chttp2/frame_settings.h
+++ b/src/core/transport/chttp2/frame_settings.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H
 
 #include <grpc/support/port_platform.h>
 #include <grpc/support/slice.h>
@@ -100,4 +100,4 @@ grpc_chttp2_parse_error grpc_chttp2_settings_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H */
diff --git a/src/core/transport/chttp2/frame_window_update.h b/src/core/transport/chttp2/frame_window_update.h
index 89d835c07979e6fbf566eb1a64d2f7c6ca329812..0b3712b09183a19cee5f6d6392cf96abd0b95bf9 100644
--- a/src/core/transport/chttp2/frame_window_update.h
+++ b/src/core/transport/chttp2/frame_window_update.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H
 
 #include "src/core/iomgr/exec_ctx.h"
 #include <grpc/support/slice.h>
@@ -53,4 +53,4 @@ grpc_chttp2_parse_error grpc_chttp2_window_update_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_WINDOW_UPDATE_H */
diff --git a/src/core/transport/chttp2/hpack_encoder.h b/src/core/transport/chttp2/hpack_encoder.h
index 19b5cb72ae1579dd8a27086ec3e49b7ee1397623..90aaf867c51eb12627ac680cb827fa99fcefd97e 100644
--- a/src/core/transport/chttp2/hpack_encoder.h
+++ b/src/core/transport/chttp2/hpack_encoder.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H
 
 #include "src/core/transport/chttp2/frame.h"
 #include "src/core/transport/metadata.h"
@@ -92,4 +92,4 @@ void grpc_chttp2_encode_header(grpc_chttp2_hpack_compressor *c, uint32_t id,
                                grpc_metadata_batch *metadata, int is_eof,
                                gpr_slice_buffer *outbuf);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_HPACK_ENCODER_H */
diff --git a/src/core/transport/chttp2/hpack_parser.h b/src/core/transport/chttp2/hpack_parser.h
index 1ad0c64fb9cae281e664243fe7d1686faa105f36..6a6d136da25b606cca2ded25cfb273bb57845221 100644
--- a/src/core/transport/chttp2/hpack_parser.h
+++ b/src/core/transport/chttp2/hpack_parser.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H
 
 #include <stddef.h>
 
@@ -113,4 +113,4 @@ grpc_chttp2_parse_error grpc_chttp2_header_parser_parse(
     grpc_chttp2_transport_parsing *transport_parsing,
     grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_HPACK_PARSER_H */
diff --git a/src/core/transport/chttp2/hpack_table.h b/src/core/transport/chttp2/hpack_table.h
index e7431255fc7fbbd39240907e46a42068dddb9572..6e1b5e66b5d06663695077617ac346484cba9892 100644
--- a/src/core/transport/chttp2/hpack_table.h
+++ b/src/core/transport/chttp2/hpack_table.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H
 
 #include "src/core/transport/metadata.h"
 #include <grpc/support/port_platform.h>
@@ -105,4 +105,4 @@ typedef struct {
 grpc_chttp2_hptbl_find_result grpc_chttp2_hptbl_find(
     const grpc_chttp2_hptbl *tbl, grpc_mdelem *md);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_HPACK_TABLE_H */
diff --git a/src/core/transport/chttp2/http2_errors.h b/src/core/transport/chttp2/http2_errors.h
index a4f309e0565d40ed251f2c799ccb4d1b02d5ecb4..4290df3d894753f984797d1335214c91c580bc21 100644
--- a/src/core/transport/chttp2/http2_errors.h
+++ b/src/core/transport/chttp2/http2_errors.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H
 
 /* error codes for RST_STREAM from http2 draft 14 section 7 */
 typedef enum {
@@ -53,4 +53,4 @@ typedef enum {
   GRPC_CHTTP2__ERROR_DO_NOT_USE = -1
 } grpc_chttp2_error_code;
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_HTTP2_ERRORS_H */
diff --git a/src/core/transport/chttp2/huffsyms.h b/src/core/transport/chttp2/huffsyms.h
index a3cdba8235a1a75820a41050391e1fba87a7cb79..9c4f09dcf6e894442036e3679c7d5b89ee4789a5 100644
--- a/src/core/transport/chttp2/huffsyms.h
+++ b/src/core/transport/chttp2/huffsyms.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H
 
 /* HPACK static huffman table */
 
@@ -45,4 +45,4 @@ typedef struct {
 
 extern const grpc_chttp2_huffsym grpc_chttp2_huffsyms[GRPC_CHTTP2_NUM_HUFFSYMS];
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_HUFFSYMS_H */
diff --git a/src/core/transport/chttp2/incoming_metadata.h b/src/core/transport/chttp2/incoming_metadata.h
index ea74cfc64b2a7cd57cb977dd477341b8fea886c8..52454f348c8f1bedfa8c6879d11302e9a867fdda 100644
--- a/src/core/transport/chttp2/incoming_metadata.h
+++ b/src/core/transport/chttp2/incoming_metadata.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHTTP2_INCOMING_METADATA_H
-#define GRPC_INTERNAL_CORE_CHTTP2_INCOMING_METADATA_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_INCOMING_METADATA_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_INCOMING_METADATA_H
 
 #include "src/core/transport/transport.h"
 
@@ -57,4 +57,4 @@ void grpc_chttp2_incoming_metadata_buffer_add(
 void grpc_chttp2_incoming_metadata_buffer_set_deadline(
     grpc_chttp2_incoming_metadata_buffer *buffer, gpr_timespec deadline);
 
-#endif /* GRPC_INTERNAL_CORE_CHTTP2_INCOMING_METADATA_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_INCOMING_METADATA_H */
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index b720d1ab3e5a64cdb369ac83fcc375f9bff56c4d..0690cb37cdec0cae13f9b2264bd558a48df30ad2 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CHTTP2_INTERNAL_H
-#define GRPC_INTERNAL_CORE_CHTTP2_INTERNAL_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_INTERNAL_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_INTERNAL_H
 
 #include <assert.h>
 #include <stdbool.h>
@@ -777,4 +777,4 @@ void grpc_chttp2_ack_ping(grpc_exec_ctx *exec_ctx,
 void grpc_chttp2_become_writable(grpc_chttp2_transport_global *transport_global,
                                  grpc_chttp2_stream_global *stream_global);
 
-#endif
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_INTERNAL_H */
diff --git a/src/core/transport/chttp2/status_conversion.h b/src/core/transport/chttp2/status_conversion.h
index 0ec5b560b8ed0df1f4010abd79d876d91c260eea..c6e066bb5da69888ef3a05542bacdf9b94efa78b 100644
--- a/src/core/transport/chttp2/status_conversion.h
+++ b/src/core/transport/chttp2/status_conversion.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H
 
 #include <grpc/grpc.h>
 #include "src/core/transport/chttp2/http2_errors.h"
@@ -47,4 +47,4 @@ grpc_status_code grpc_chttp2_http2_error_to_grpc_status(
 grpc_status_code grpc_chttp2_http2_status_to_grpc_status(int status);
 int grpc_chttp2_grpc_status_to_http2_status(grpc_status_code status);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_STATUS_CONVERSION_H */
diff --git a/src/core/transport/chttp2/stream_map.h b/src/core/transport/chttp2/stream_map.h
index 7a0e45fab2ca14c4757350d3d3ddc13b48fd88cc..957a58a4f27d9dec7ced5b0476c468214f2d24cc 100644
--- a/src/core/transport/chttp2/stream_map.h
+++ b/src/core/transport/chttp2/stream_map.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H
 
 #include <grpc/support/port_platform.h>
 
@@ -81,4 +81,4 @@ void grpc_chttp2_stream_map_for_each(grpc_chttp2_stream_map *map,
                                                void *value),
                                      void *user_data);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_STREAM_MAP_H */
diff --git a/src/core/transport/chttp2/timeout_encoding.c b/src/core/transport/chttp2/timeout_encoding.c
index a6f7081d21b96427cd9b9749efbb5f5f9d013475..c4802e050ec24fc4a18dbce8a71cc623a93c9d67 100644
--- a/src/core/transport/chttp2/timeout_encoding.c
+++ b/src/core/transport/chttp2/timeout_encoding.c
@@ -150,7 +150,7 @@ int grpc_chttp2_decode_timeout(const char *buffer, gpr_timespec *timeout) {
     /* spec allows max. 8 digits, but we allow values up to 1,000,000,000 */
     if (x >= (100 * 1000 * 1000)) {
       if (x != (100 * 1000 * 1000) || digit != 0) {
-        *timeout = gpr_inf_future(GPR_CLOCK_REALTIME);
+        *timeout = gpr_inf_future(GPR_TIMESPAN);
         return 1;
       }
     }
diff --git a/src/core/transport/chttp2/timeout_encoding.h b/src/core/transport/chttp2/timeout_encoding.h
index 9d8756e799d3d8112cfff1c99cf47b2072403600..81bae8e9363a8b28f778e12db39453a339ee6876 100644
--- a/src/core/transport/chttp2/timeout_encoding.h
+++ b/src/core/transport/chttp2/timeout_encoding.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H
 
 #include "src/core/support/string.h"
 #include <grpc/support/time.h>
@@ -44,4 +44,4 @@
 void grpc_chttp2_encode_timeout(gpr_timespec timeout, char *buffer);
 int grpc_chttp2_decode_timeout(const char *buffer, gpr_timespec *timeout);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_TIMEOUT_ENCODING_H */
diff --git a/src/core/transport/chttp2/varint.h b/src/core/transport/chttp2/varint.h
index 2d92b6693e9c87f28dbd506a2da78e8606edfd22..7ab9d22ab52de5ac73eb4b6fc4393f12796ced6b 100644
--- a/src/core/transport/chttp2/varint.h
+++ b/src/core/transport/chttp2/varint.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_VARINT_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_VARINT_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_VARINT_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_VARINT_H
 
 #include <grpc/support/port_platform.h>
 
@@ -72,4 +72,4 @@ void grpc_chttp2_hpack_write_varint_tail(uint32_t tail_value, uint8_t* target,
     }                                                                         \
   } while (0)
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_VARINT_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_VARINT_H */
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 03444fd4c248ad63132ea7b52bebcc9aad667d6c..b16768d06efbe7bc43b6754b85b0e487f3b37f57 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -1757,8 +1757,9 @@ static char *chttp2_get_peer(grpc_exec_ctx *exec_ctx, grpc_transport *t) {
 }
 
 static const grpc_transport_vtable vtable = {
-    sizeof(grpc_chttp2_stream), init_stream, set_pollset, perform_stream_op,
-    perform_transport_op, destroy_stream, destroy_transport, chttp2_get_peer};
+    sizeof(grpc_chttp2_stream), "chttp2", init_stream, set_pollset,
+    perform_stream_op, perform_transport_op, destroy_stream, destroy_transport,
+    chttp2_get_peer};
 
 grpc_transport *grpc_create_chttp2_transport(
     grpc_exec_ctx *exec_ctx, const grpc_channel_args *channel_args,
diff --git a/src/core/transport/chttp2_transport.h b/src/core/transport/chttp2_transport.h
index 95520501edde98b3272d9a6e23f267b4402a69be..9a6cf0ed359607bd5cf083db2e9f5ac0ccb955e5 100644
--- a/src/core/transport/chttp2_transport.h
+++ b/src/core/transport/chttp2_transport.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TRANSPORT_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TRANSPORT_H
+#ifndef GRPC_CORE_TRANSPORT_CHTTP2_TRANSPORT_H
+#define GRPC_CORE_TRANSPORT_CHTTP2_TRANSPORT_H
 
 #include "src/core/iomgr/endpoint.h"
 #include "src/core/transport/transport.h"
@@ -48,4 +48,4 @@ void grpc_chttp2_transport_start_reading(grpc_exec_ctx *exec_ctx,
                                          grpc_transport *transport,
                                          gpr_slice *slices, size_t nslices);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_TRANSPORT_H */
+#endif /* GRPC_CORE_TRANSPORT_CHTTP2_TRANSPORT_H */
diff --git a/src/core/transport/connectivity_state.h b/src/core/transport/connectivity_state.h
index a4eb6652e551b815d28b51e29d11d93472088d73..b4a3ce924d41ce955cc1d321f52965deb2de5972 100644
--- a/src/core/transport/connectivity_state.h
+++ b/src/core/transport/connectivity_state.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H
+#ifndef GRPC_CORE_TRANSPORT_CONNECTIVITY_STATE_H
+#define GRPC_CORE_TRANSPORT_CONNECTIVITY_STATE_H
 
 #include <grpc/grpc.h>
 #include "src/core/iomgr/exec_ctx.h"
@@ -82,4 +82,4 @@ int grpc_connectivity_state_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
     grpc_connectivity_state *current, grpc_closure *notify);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H */
+#endif /* GRPC_CORE_TRANSPORT_CONNECTIVITY_STATE_H */
diff --git a/src/core/transport/metadata.h b/src/core/transport/metadata.h
index 8742846be7e6250d7987b196bb7e4e2b500e6055..5ab397848cc237ffad4de1323499c10513964972 100644
--- a/src/core/transport/metadata.h
+++ b/src/core/transport/metadata.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_METADATA_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_METADATA_H
+#ifndef GRPC_CORE_TRANSPORT_METADATA_H
+#define GRPC_CORE_TRANSPORT_METADATA_H
 
 #include <grpc/support/slice.h>
 #include <grpc/support/useful.h>
@@ -153,4 +153,4 @@ int grpc_mdstr_is_bin_suffixed(grpc_mdstr *s);
 void grpc_mdctx_global_init(void);
 void grpc_mdctx_global_shutdown(void);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_METADATA_H */
+#endif /* GRPC_CORE_TRANSPORT_METADATA_H */
diff --git a/src/core/transport/metadata_batch.h b/src/core/transport/metadata_batch.h
index 1b0d1fda3e220589cc8271eb6867a2aaf8c46a62..9337b28328e9b8a8789c11d6cd6cc659564a4af8 100644
--- a/src/core/transport/metadata_batch.h
+++ b/src/core/transport/metadata_batch.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_STREAM_OP_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_STREAM_OP_H
+#ifndef GRPC_CORE_TRANSPORT_METADATA_BATCH_H
+#define GRPC_CORE_TRANSPORT_METADATA_BATCH_H
 
 #include <grpc/grpc.h>
 #include <grpc/support/port_platform.h>
@@ -122,4 +122,4 @@ void grpc_metadata_batch_assert_ok(grpc_metadata_batch *comd);
   } while (0)
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_STREAM_OP_H */
+#endif /* GRPC_CORE_TRANSPORT_METADATA_BATCH_H */
diff --git a/src/core/transport/static_metadata.c b/src/core/transport/static_metadata.c
index eeedae0619958d69db393971f744a0765a3c370e..84abb59e996fe755d3e308daf54d9bfbe13360aa 100644
--- a/src/core/transport/static_metadata.c
+++ b/src/core/transport/static_metadata.c
@@ -50,7 +50,7 @@ grpc_mdstr grpc_static_mdstr_table[GRPC_STATIC_MDSTR_COUNT];
 grpc_mdelem grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];
 uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 3, 7, 5, 2, 4, 8, 6, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 4, 8, 6, 2, 4, 8, 6, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
diff --git a/src/core/transport/static_metadata.h b/src/core/transport/static_metadata.h
index ef72b802b51bbcbc35d0e888c886b2ee96efe955..85442f81078720ab93b0d3a1c95e509855db4ae5 100644
--- a/src/core/transport/static_metadata.h
+++ b/src/core/transport/static_metadata.h
@@ -43,8 +43,8 @@
  * explanation of what's going on.
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_STATIC_METADATA_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_STATIC_METADATA_H
+#ifndef GRPC_CORE_TRANSPORT_STATIC_METADATA_H
+#define GRPC_CORE_TRANSPORT_STATIC_METADATA_H
 
 #include "src/core/transport/metadata.h"
 
@@ -405,4 +405,4 @@ extern const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT];
 extern const uint8_t grpc_static_accept_encoding_metadata[8];
 #define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) \
   (&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]])
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_STATIC_METADATA_H */
+#endif /* GRPC_CORE_TRANSPORT_STATIC_METADATA_H */
diff --git a/src/core/transport/transport.h b/src/core/transport/transport.h
index ed6e121c9cbb685e4b7e109a7f92110320f9c424..0f068dcb38f0951d34064293b3460306d93d954a 100644
--- a/src/core/transport/transport.h
+++ b/src/core/transport/transport.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_H
+#ifndef GRPC_CORE_TRANSPORT_TRANSPORT_H
+#define GRPC_CORE_TRANSPORT_TRANSPORT_H
 
 #include <stddef.h>
 
@@ -239,4 +239,4 @@ void grpc_transport_destroy(grpc_exec_ctx *exec_ctx, grpc_transport *transport);
 char *grpc_transport_get_peer(grpc_exec_ctx *exec_ctx,
                               grpc_transport *transport);
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_H */
+#endif /* GRPC_CORE_TRANSPORT_TRANSPORT_H */
diff --git a/src/core/transport/transport_impl.h b/src/core/transport/transport_impl.h
index 40bfb4b13ac14a36e6c936630cc0fcc40b3be8d9..d9ecc4d2ba2d4593bd4e5fe0759fabfe49c9ce99 100644
--- a/src/core/transport/transport_impl.h
+++ b/src/core/transport/transport_impl.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_IMPL_H
-#define GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_IMPL_H
+#ifndef GRPC_CORE_TRANSPORT_TRANSPORT_IMPL_H
+#define GRPC_CORE_TRANSPORT_TRANSPORT_IMPL_H
 
 #include "src/core/transport/transport.h"
 
@@ -41,6 +41,9 @@ typedef struct grpc_transport_vtable {
      layers and initialized by the transport */
   size_t sizeof_stream; /* = sizeof(transport stream) */
 
+  /* name of this transport implementation */
+  const char *name;
+
   /* implementation of grpc_transport_init_stream */
   int (*init_stream)(grpc_exec_ctx *exec_ctx, grpc_transport *self,
                      grpc_stream *stream, grpc_stream_refcount *refcount,
@@ -75,4 +78,4 @@ struct grpc_transport {
   const grpc_transport_vtable *vtable;
 };
 
-#endif /* GRPC_INTERNAL_CORE_TRANSPORT_TRANSPORT_IMPL_H */
+#endif /* GRPC_CORE_TRANSPORT_TRANSPORT_IMPL_H */
diff --git a/src/core/tsi/fake_transport_security.h b/src/core/tsi/fake_transport_security.h
index fe295aa53607ca63c8d2f060d5dfb8bb0a3da613..6b8e5962905740914934fb3ed4ec7ee7dc8cccc8 100644
--- a/src/core/tsi/fake_transport_security.h
+++ b/src/core/tsi/fake_transport_security.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TSI_FAKE_TRANSPORT_SECURITY_H
-#define GRPC_INTERNAL_CORE_TSI_FAKE_TRANSPORT_SECURITY_H
+#ifndef GRPC_CORE_TSI_FAKE_TRANSPORT_SECURITY_H
+#define GRPC_CORE_TSI_FAKE_TRANSPORT_SECURITY_H
 
 #include "src/core/tsi/transport_security_interface.h"
 
@@ -58,4 +58,4 @@ tsi_frame_protector *tsi_create_fake_protector(
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_TSI_FAKE_TRANSPORT_SECURITY_H */
+#endif /* GRPC_CORE_TSI_FAKE_TRANSPORT_SECURITY_H */
diff --git a/src/core/tsi/ssl_transport_security.h b/src/core/tsi/ssl_transport_security.h
index 32bb067f0bf499f566b5058312439eb90d27256e..612f5c64cc12bba4e76bac7ffd042ece909622de 100644
--- a/src/core/tsi/ssl_transport_security.h
+++ b/src/core/tsi/ssl_transport_security.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TSI_SSL_TRANSPORT_SECURITY_H
-#define GRPC_INTERNAL_CORE_TSI_SSL_TRANSPORT_SECURITY_H
+#ifndef GRPC_CORE_TSI_SSL_TRANSPORT_SECURITY_H
+#define GRPC_CORE_TSI_SSL_TRANSPORT_SECURITY_H
 
 #include "src/core/tsi/transport_security_interface.h"
 
@@ -171,4 +171,4 @@ int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_TSI_SSL_TRANSPORT_SECURITY_H */
+#endif /* GRPC_CORE_TSI_SSL_TRANSPORT_SECURITY_H */
diff --git a/src/core/tsi/ssl_types.h b/src/core/tsi/ssl_types.h
index 0d0225e9c7ba83cd96010693f4612cb68e7bac7f..6ea85fe6d4730844bd4873aadccbbae2d254136a 100644
--- a/src/core/tsi/ssl_types.h
+++ b/src/core/tsi/ssl_types.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TSI_SSL_TYPES_H
-#define GRPC_INTERNAL_CORE_TSI_SSL_TYPES_H
+#ifndef GRPC_CORE_TSI_SSL_TYPES_H
+#define GRPC_CORE_TSI_SSL_TYPES_H
 
 /* A collection of macros to cast between various integer types that are
  * used differently between BoringSSL and OpenSSL:
@@ -52,4 +52,4 @@
 #define TSI_SIZE_AS_SIZE(x) ((int)(x))
 #endif
 
-#endif
+#endif /* GRPC_CORE_TSI_SSL_TYPES_H */
diff --git a/src/core/tsi/transport_security.h b/src/core/tsi/transport_security.h
index 4077737473ac5b34468fa75e109bb94d4ad2b691..ecc037193ba6ef4c2593dd5726d1370096b89edd 100644
--- a/src/core/tsi/transport_security.h
+++ b/src/core/tsi/transport_security.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_H
-#define GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_H
+#ifndef GRPC_CORE_TSI_TRANSPORT_SECURITY_H
+#define GRPC_CORE_TSI_TRANSPORT_SECURITY_H
 
 #include "src/core/tsi/transport_security_interface.h"
 
@@ -108,4 +108,4 @@ char *tsi_strdup(const char *src); /* Sadly, no strdup in C89. */
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_H */
+#endif /* GRPC_CORE_TSI_TRANSPORT_SECURITY_H */
diff --git a/src/core/tsi/transport_security_interface.h b/src/core/tsi/transport_security_interface.h
index 69ee17ae917924c88448815a60c86fb8f5bf37d4..08501802f55d036b3e9ff8ef731cd6a14d8166e1 100644
--- a/src/core/tsi/transport_security_interface.h
+++ b/src/core/tsi/transport_security_interface.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H
-#define GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H
+#ifndef GRPC_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H
+#define GRPC_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H
 
 #include <stdint.h>
 #include <stdlib.h>
@@ -341,4 +341,4 @@ void tsi_handshaker_destroy(tsi_handshaker *self);
 }
 #endif
 
-#endif /* GRPC_INTERNAL_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H */
+#endif /* GRPC_CORE_TSI_TRANSPORT_SECURITY_INTERFACE_H */
diff --git a/src/cpp/client/secure_credentials.cc b/src/cpp/client/secure_credentials.cc
index 308455527c390792a19c3eb44b73327226b25d88..c34b840f90888317ee3c32010f599190c6611071 100644
--- a/src/cpp/client/secure_credentials.cc
+++ b/src/cpp/client/secure_credentials.cc
@@ -60,8 +60,7 @@ std::shared_ptr<grpc::Channel> SecureChannelCredentials::CreateChannel(
 
 SecureCallCredentials::SecureCallCredentials(grpc_call_credentials* c_creds)
     : c_creds_(c_creds) {
-  internal::GrpcLibraryInitializer gli_initializer;
-  gli_initializer.summon();
+  g_gli_initializer.summon();
 }
 
 bool SecureCallCredentials::ApplyToCall(grpc_call* call) {
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index eb49b210379109529e0e3c54518ce1d867fb21be..5d12ce2ecfd730d9ab2c8accde5ac8e8641b1229 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -43,6 +43,7 @@
 #include <grpc/support/log.h>
 
 #include "src/core/channel/compress_filter.h"
+#include "src/core/surface/call.h"
 #include "src/cpp/common/create_auth_context.h"
 
 namespace grpc {
@@ -197,7 +198,7 @@ bool ServerContext::IsCancelled() const {
 
 void ServerContext::set_compression_level(grpc_compression_level level) {
   const grpc_compression_algorithm algorithm_for_level =
-      grpc_compression_algorithm_for_level(level);
+      grpc_call_compression_for_level(call_, level);
   set_compression_algorithm(algorithm_for_level);
 }
 
diff --git a/src/node/ext/call_credentials.cc b/src/node/ext/call_credentials.cc
index 98696db23254c66ff3df08a1e5ecbe090e6edd7b..bd2d146bbc719f481ef764980c3721959a2e02d7 100644
--- a/src/node/ext/call_credentials.cc
+++ b/src/node/ext/call_credentials.cc
@@ -35,6 +35,8 @@
 #include <nan.h>
 #include <uv.h>
 
+#include <list>
+
 #include "grpc/grpc.h"
 #include "grpc/grpc_security.h"
 #include "grpc/support/log.h"
@@ -161,6 +163,15 @@ NAN_METHOD(CallCredentials::CreateFromPlugin) {
   grpc_metadata_credentials_plugin plugin;
   plugin_state *state = new plugin_state;
   state->callback = new Nan::Callback(info[0].As<Function>());
+  state->pending_callbacks = new std::list<plugin_callback_data*>();
+  uv_mutex_init(&state->plugin_mutex);
+  uv_async_init(uv_default_loop(),
+                &state->plugin_async,
+                SendPluginCallback);
+  uv_unref((uv_handle_t*)&state->plugin_async);
+
+  state->plugin_async.data = state;
+
   plugin.get_metadata = plugin_get_metadata;
   plugin.destroy = plugin_destroy_state;
   plugin.state = reinterpret_cast<void*>(state);
@@ -208,48 +219,60 @@ NAN_METHOD(PluginCallback) {
 
 NAUV_WORK_CB(SendPluginCallback) {
   Nan::HandleScope scope;
-  plugin_callback_data *data = reinterpret_cast<plugin_callback_data*>(
-      async->data);
-  // Attach cb and user_data to plugin_callback so that it can access them later
-  v8::Local<v8::Function> plugin_callback = Nan::GetFunction(
-      Nan::New<v8::FunctionTemplate>(PluginCallback)).ToLocalChecked();
-  Nan::Set(plugin_callback, Nan::New("cb").ToLocalChecked(),
-           Nan::New<v8::External>(reinterpret_cast<void*>(data->cb)));
-  Nan::Set(plugin_callback, Nan::New("user_data").ToLocalChecked(),
-           Nan::New<v8::External>(data->user_data));
-  const int argc = 2;
-  v8::Local<v8::Value> argv[argc] = {
-    Nan::New(data->service_url).ToLocalChecked(),
-    plugin_callback
-  };
-  Nan::Callback *callback = data->state->callback;
-  callback->Call(argc, argv);
-  delete data;
-  uv_unref((uv_handle_t *)async);
-  uv_close((uv_handle_t *)async, (uv_close_cb)free);
+  plugin_state *state = reinterpret_cast<plugin_state*>(async->data);
+  std::list<plugin_callback_data*> callbacks;
+  uv_mutex_lock(&state->plugin_mutex);
+  callbacks.splice(callbacks.begin(), *state->pending_callbacks);
+  uv_mutex_unlock(&state->plugin_mutex);
+  while (!callbacks.empty()) {
+    plugin_callback_data *data = callbacks.front();
+    callbacks.pop_front();
+    // Attach cb and user_data to plugin_callback so that it can access them later
+    v8::Local<v8::Function> plugin_callback = Nan::GetFunction(
+        Nan::New<v8::FunctionTemplate>(PluginCallback)).ToLocalChecked();
+    Nan::Set(plugin_callback, Nan::New("cb").ToLocalChecked(),
+             Nan::New<v8::External>(reinterpret_cast<void*>(data->cb)));
+    Nan::Set(plugin_callback, Nan::New("user_data").ToLocalChecked(),
+             Nan::New<v8::External>(data->user_data));
+    const int argc = 2;
+    v8::Local<v8::Value> argv[argc] = {
+      Nan::New(data->service_url).ToLocalChecked(),
+      plugin_callback
+    };
+    Nan::Callback *callback = state->callback;
+    callback->Call(argc, argv);
+    delete data;
+  }
 }
 
 void plugin_get_metadata(void *state, grpc_auth_metadata_context context,
                          grpc_credentials_plugin_metadata_cb cb,
                          void *user_data) {
-  uv_async_t *async = static_cast<uv_async_t*>(malloc(sizeof(uv_async_t)));
-  uv_async_init(uv_default_loop(),
-                async,
-                SendPluginCallback);
+  plugin_state *p_state = reinterpret_cast<plugin_state*>(state);
   plugin_callback_data *data = new plugin_callback_data;
-  data->state = reinterpret_cast<plugin_state*>(state);
   data->service_url = context.service_url;
   data->cb = cb;
   data->user_data = user_data;
-  async->data = data;
-  /* libuv says that it will coalesce calls to uv_async_send. If there is ever a
-   * problem with a callback not getting called, that is probably the reason */
-  uv_async_send(async);
+
+  uv_mutex_lock(&p_state->plugin_mutex);
+  p_state->pending_callbacks->push_back(data);
+  uv_mutex_unlock(&p_state->plugin_mutex);
+
+  uv_async_send(&p_state->plugin_async);
+}
+
+void plugin_uv_close_cb(uv_handle_t *handle) {
+  uv_async_t *async = reinterpret_cast<uv_async_t*>(handle);
+  plugin_state *state = reinterpret_cast<plugin_state *>(async->data);
+  uv_mutex_destroy(&state->plugin_mutex);
+  delete state->pending_callbacks;
+  delete state->callback;
+  delete state;
 }
 
 void plugin_destroy_state(void *ptr) {
   plugin_state *state = reinterpret_cast<plugin_state *>(ptr);
-  delete state->callback;
+  uv_close((uv_handle_t*)&state->plugin_async, plugin_uv_close_cb);
 }
 
 }  // namespace node
diff --git a/src/node/ext/call_credentials.h b/src/node/ext/call_credentials.h
index a9bfe30f9404b6d3af236ce091d905c23d5161d8..1f35595f3d3422195aaee56e37da019021bd6d60 100644
--- a/src/node/ext/call_credentials.h
+++ b/src/node/ext/call_credentials.h
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,8 +34,11 @@
 #ifndef GRPC_NODE_CALL_CREDENTIALS_H_
 #define GRPC_NODE_CALL_CREDENTIALS_H_
 
+#include <list>
+
 #include <node.h>
 #include <nan.h>
+#include <uv.h>
 #include "grpc/grpc_security.h"
 
 namespace grpc {
@@ -73,17 +76,20 @@ class CallCredentials : public Nan::ObjectWrap {
 
 /* Auth metadata plugin functionality */
 
-typedef struct plugin_state {
-  Nan::Callback *callback;
-} plugin_state;
-
 typedef struct plugin_callback_data {
-  plugin_state *state;
   const char *service_url;
   grpc_credentials_plugin_metadata_cb cb;
   void *user_data;
 } plugin_callback_data;
 
+typedef struct plugin_state {
+  Nan::Callback *callback;
+  std::list<plugin_callback_data*> *pending_callbacks;
+  uv_mutex_t plugin_mutex;
+  // async.data == this
+  uv_async_t plugin_async;
+} plugin_state;
+
 void plugin_get_metadata(void *state, grpc_auth_metadata_context context,
                          grpc_credentials_plugin_metadata_cb cb,
                          void *user_data);
diff --git a/src/node/src/credentials.js b/src/node/src/credentials.js
index 1d73723cc064501d38fb97ad9cf21710779fce34..97c4bd73ac4b02cafc4e1047812f944647c83011 100644
--- a/src/node/src/credentials.js
+++ b/src/node/src/credentials.js
@@ -118,7 +118,6 @@ exports.createFromMetadataGenerator = function(metadata_generator) {
 exports.createFromGoogleCredential = function(google_credential) {
   return exports.createFromMetadataGenerator(function(auth_context, callback) {
     var service_url = auth_context.service_url;
-    console.log('Service URL:', service_url);
     google_credential.getRequestMetadata(service_url, function(err, header) {
       if (err) {
         console.log('Auth error:', err);
@@ -127,7 +126,6 @@ exports.createFromGoogleCredential = function(google_credential) {
       }
       var metadata = new Metadata();
       metadata.add('authorization', header.Authorization);
-      console.log(header.Authorization);
       callback(null, metadata);
     });
   });
diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m
index 2d45818b6e960ac9f9d8aff5dcb321b3413ab833..51263b073ca8bed68b43a904777f1197e622c1f9 100644
--- a/src/objective-c/GRPCClient/GRPCCall.m
+++ b/src/objective-c/GRPCClient/GRPCCall.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -308,37 +308,30 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 }
 
 - (void)invokeCall {
-  __weak GRPCCall *weakSelf = self;
   [self invokeCallWithHeadersHandler:^(NSDictionary *headers) {
     // Response headers received.
-    GRPCCall *strongSelf = weakSelf;
-    if (strongSelf) {
-      strongSelf.responseHeaders = headers;
-      [strongSelf startNextRead];
-    }
+    self.responseHeaders = headers;
+    [self startNextRead];
   } completionHandler:^(NSError *error, NSDictionary *trailers) {
-    GRPCCall *strongSelf = weakSelf;
-    if (strongSelf) {
-      strongSelf.responseTrailers = trailers;
-
-      if (error) {
-        NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
-        if (error.userInfo) {
-          [userInfo addEntriesFromDictionary:error.userInfo];
-        }
-        userInfo[kGRPCTrailersKey] = strongSelf.responseTrailers;
-        // TODO(jcanizales): The C gRPC library doesn't guarantee that the headers block will be
-        // called before this one, so an error might end up with trailers but no headers. We
-        // shouldn't call finishWithError until ater both blocks are called. It is also when this is
-        // done that we can provide a merged view of response headers and trailers in a thread-safe
-        // way.
-        if (strongSelf.responseHeaders) {
-          userInfo[kGRPCHeadersKey] = strongSelf.responseHeaders;
-        }
-        error = [NSError errorWithDomain:error.domain code:error.code userInfo:userInfo];
+    self.responseTrailers = trailers;
+
+    if (error) {
+      NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];
+      if (error.userInfo) {
+        [userInfo addEntriesFromDictionary:error.userInfo];
+      }
+      userInfo[kGRPCTrailersKey] = self.responseTrailers;
+      // TODO(jcanizales): The C gRPC library doesn't guarantee that the headers block will be
+      // called before this one, so an error might end up with trailers but no headers. We
+      // shouldn't call finishWithError until ater both blocks are called. It is also when this is
+      // done that we can provide a merged view of response headers and trailers in a thread-safe
+      // way.
+      if (self.responseHeaders) {
+        userInfo[kGRPCHeadersKey] = self.responseHeaders;
       }
-      [strongSelf finishWithError:error];
+      error = [NSError errorWithDomain:error.domain code:error.code userInfo:userInfo];
     }
+    [self finishWithError:error];
   }];
   // Now that the RPC has been initiated, request writes can start.
   @synchronized(_requestWriter) {
@@ -377,7 +370,6 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
       [strongSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
                                                       code:GRPCErrorCodeUnavailable
                                                   userInfo:@{NSLocalizedDescriptionKey: @"Connectivity lost."}]];
-      [[GRPCHost hostWithAddress:strongSelf->_host] disconnect];
     }
   }];
 }
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
index fe3d51da53a58a409621433744fdd028872e64a3..f6527e283cfe70be95a8a04929c6598b32b22905 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -54,7 +54,9 @@
 
 - (void)finish {
   if (_handler) {
-    _handler();
+    void(^handler)() = _handler;
+    _handler = nil;
+    handler();
   }
 }
 @end
diff --git a/src/php/ext/grpc/channel.c b/src/php/ext/grpc/channel.c
index f0bc7340ba9fd77bd5030b76a097b7da89d4158f..b7e7c26c10969d1b757a513b344b73d971729662 100644
--- a/src/php/ext/grpc/channel.c
+++ b/src/php/ext/grpc/channel.c
@@ -110,9 +110,11 @@ void php_grpc_read_args_array(zval *args_array, grpc_channel_args *args) {
     switch (Z_TYPE_P(*data)) {
       case IS_LONG:
         args->args[args_index].value.integer = (int)Z_LVAL_P(*data);
+        args->args[args_index].type = GRPC_ARG_INTEGER;
         break;
       case IS_STRING:
         args->args[args_index].value.string = Z_STRVAL_P(*data);
+        args->args[args_index].type = GRPC_ARG_STRING;
         break;
       default:
         zend_throw_exception(spl_ce_InvalidArgumentException,
diff --git a/src/proto/grpc/testing/metrics.proto b/src/proto/grpc/testing/metrics.proto
index 4485d3a53b577f4f6a063f5f55aecb4e7deb145e..0cc4b602396f780b05cdce10b2837e93683a0215 100644
--- a/src/proto/grpc/testing/metrics.proto
+++ b/src/proto/grpc/testing/metrics.proto
@@ -1,4 +1,3 @@
-
 // Copyright 2015, Google Inc.
 // All rights reserved.
 //
@@ -28,12 +27,17 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// An integration test service that covers all the method signature permutations
-// of unary/streaming requests/responses.
+// Contains the definitions for a metrics service and the type of metrics
+// exposed by the service.
+//
+// Currently, 'Gauge' (i.e a metric that represents the measured value of
+// something at an instant of time) is the only metric type supported by the
+// service.
 syntax = "proto3";
 
 package grpc.testing;
 
+// Reponse message containing the gauge name and value
 message GaugeResponse {
   string name = 1;
   oneof value {
@@ -43,11 +47,18 @@ message GaugeResponse {
   }
 }
 
-message GaugeRequest { string name = 1; }
+// Request message containing the gauge name
+message GaugeRequest {
+  string name = 1;
+}
 
 message EmptyMessage {}
 
 service MetricsService {
+  // Returns the values of all the gauges that are currently being maintained by
+  // the service
   rpc GetAllGauges(EmptyMessage) returns (stream GaugeResponse);
+
+  // Returns the value of one gauge
   rpc GetGauge(GaugeRequest) returns (GaugeResponse);
 }
diff --git a/src/python/grpcio/README.rst b/src/python/grpcio/README.rst
index 3f4c6fad02d19baa003d3dccb5d69691857c572c..33a462b66f8577cd58aea1acf3726a9913819535 100644
--- a/src/python/grpcio/README.rst
+++ b/src/python/grpcio/README.rst
@@ -50,10 +50,43 @@ Troubleshooting
 Help, I ...
 
 * **... see a** :code:`pkg_resources.VersionConflict` **when I try to install
-  grpc!**
+  grpc**
 
   This is likely because :code:`pip` doesn't own the offending dependency,
   which in turn is likely because your operating system's package manager owns
   it. You'll need to force the installation of the dependency:
 
   :code:`pip install --ignore-installed $OFFENDING_DEPENDENCY`
+
+  For example, if you get an error like the following:
+
+  ::
+
+    Traceback (most recent call last):
+    File "<string>", line 17, in <module>
+     ...
+    File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 509, in find
+      raise VersionConflict(dist, req)
+    pkg_resources.VersionConflict: (six 1.8.0 (/usr/lib/python2.7/dist-packages), Requirement.parse('six>=1.10'))
+
+  You can fix it by doing:
+
+  ::
+
+    sudo pip install --ignore-installed six
+
+* **... see the following error on some platforms**
+
+  ::
+
+    /tmp/pip-build-U8pSsr/cython/Cython/Plex/Scanners.c:4:20: fatal error: Python.h: No such file or directory
+    #include "Python.h"
+                    ^
+    compilation terminated.
+
+  You can fix it by installing `python-dev` package. i.e
+
+  ::
+
+    sudo apt-get install python-dev
+
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index c1f444f6f1f07911aa1c8d50acd84d3b8bd3e354..1d435474198521a12f45d2d6ca500566608776fb 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -288,15 +288,9 @@ class TestLite(setuptools.Command):
       sys.exit('Test failure')
 
   def _add_eggs_to_path(self):
-    """Adds all egg files under .eggs to sys.path"""
-    # TODO(jtattemusch): there has to be a cleaner way to do this
-    import pkg_resources
-    eggs_dir = os.path.join(PYTHON_STEM, '../../../.eggs')
-    eggs = [os.path.join(eggs_dir, filename)
-            for filename in os.listdir(eggs_dir)
-            if filename.endswith('.egg')]
-    for egg in eggs:
-      sys.path.insert(0, pkg_resources.normalize_path(egg))
+    """Fetch install and test requirements"""
+    self.distribution.fetch_build_eggs(self.distribution.install_requires)
+    self.distribution.fetch_build_eggs(self.distribution.tests_require)
 
 
 class RunInterop(test.test):
diff --git a/src/python/grpcio/grpc/_adapter/_types.py b/src/python/grpcio/grpc/_adapter/_types.py
index 3d5ab33d0084aef6d457dd63f4e153125fcc544d..f9e18f0bb3f2ca534866a703755e54322eccff63 100644
--- a/src/python/grpcio/grpc/_adapter/_types.py
+++ b/src/python/grpcio/grpc/_adapter/_types.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@ import abc
 import collections
 import enum
 
+import six
+
 from grpc._cython import cygrpc
 
 
@@ -247,8 +249,7 @@ class Event(collections.namedtuple(
   """
 
 
-class CompletionQueue:
-  __metaclass__ = abc.ABCMeta
+class CompletionQueue(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def __init__(self):
@@ -262,6 +263,9 @@ class CompletionQueue:
     """
     return self
 
+  def __next__(self):
+    return self.next()
+
   @abc.abstractmethod
   def next(self, deadline=float('+inf')):
     """Get the next event on this completion queue.
@@ -285,8 +289,7 @@ class CompletionQueue:
     return None
 
 
-class Call:
-  __metaclass__ = abc.ABCMeta
+class Call(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def start_batch(self, ops, tag):
@@ -334,8 +337,7 @@ class Call:
     return None
 
 
-class Channel:
-  __metaclass__ = abc.ABCMeta
+class Channel(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def __init__(self, target, args, credentials=None):
@@ -399,8 +401,7 @@ class Channel:
     return None
 
 
-class Server:
-  __metaclass__ = abc.ABCMeta
+class Server(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def __init__(self, completion_queue, args):
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index 851389a261649b50619e02aa5908f850bbe4b2dd..6ecdcf7222b6f527a5a962bfb1bf4ed5699e7466 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -254,7 +254,7 @@ cdef class ByteBuffer:
     if self.c_byte_buffer != NULL:
       with nogil:
         grpc_byte_buffer_reader_init(&reader, self.c_byte_buffer)
-      result = b""
+      result = bytearray()
       with nogil:
         while grpc_byte_buffer_reader_next(&reader, &data_slice):
           data_slice_pointer = gpr_slice_start_ptr(data_slice)
@@ -263,7 +263,7 @@ cdef class ByteBuffer:
             result += (<char *>data_slice_pointer)[:data_slice_length]
       with nogil:
         grpc_byte_buffer_reader_destroy(&reader)
-      return result
+      return bytes(result)
     else:
       return None
 
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
index b70dcccd17a9f7a923bcf57a22e41301ff342469..4d18369e1f499fb9d7db346a106fdad112e8eacc 100644
--- a/src/python/grpcio/grpc/_cython/imports.generated.h
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -166,7 +166,7 @@ extern grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_im
 typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, char **name);
 extern grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
 #define grpc_compression_algorithm_name grpc_compression_algorithm_name_import
-typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level);
+typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level, uint32_t accepted_encodings);
 extern grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
 #define grpc_compression_algorithm_for_level grpc_compression_algorithm_for_level_import
 typedef void(*grpc_compression_options_init_type)(grpc_compression_options *opts);
diff --git a/src/python/grpcio/grpc/_links/invocation.py b/src/python/grpcio/grpc/_links/invocation.py
index 5ca0a0ee606810dd3ec3070e323a989f61ff022b..672e3e4cc86f417e2bd245440400ddce65acff0b 100644
--- a/src/python/grpcio/grpc/_links/invocation.py
+++ b/src/python/grpcio/grpc/_links/invocation.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,8 @@ import logging
 import threading
 import time
 
+import six
+
 from grpc._adapter import _intermediary_low
 from grpc._links import _constants
 from grpc.beta import interfaces as beta_interfaces
@@ -372,12 +374,11 @@ class _Kernel(object):
     pool.shutdown(wait=True)
 
 
-class InvocationLink(links.Link, activated.Activated):
+class InvocationLink(six.with_metaclass(abc.ABCMeta, links.Link, activated.Activated)):
   """A links.Link for use on the invocation-side of a gRPC connection.
 
   Implementations of this interface are only valid for use when activated.
   """
-  __metaclass__ = abc.ABCMeta
 
 
 class _InvocationLink(InvocationLink):
diff --git a/src/python/grpcio/grpc/beta/interfaces.py b/src/python/grpcio/grpc/beta/interfaces.py
index 0663119163f2eadea3e2d34319da0ae2ce3b1ed5..e29a5b33792af32d3960d0f5fcc035f42da1e529 100644
--- a/src/python/grpcio/grpc/beta/interfaces.py
+++ b/src/python/grpcio/grpc/beta/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import abc
 import enum
 
+import six
+
 from grpc._adapter import _types
 
 
@@ -105,19 +107,17 @@ def grpc_call_options(disable_compression=False, credentials=None):
   return GRPCCallOptions(disable_compression, None, credentials)
 
 
-class GRPCAuthMetadataContext(object):
+class GRPCAuthMetadataContext(six.with_metaclass(abc.ABCMeta)):
   """Provides information to call credentials metadata plugins.
 
   Attributes:
     service_url: A string URL of the service being called into.
     method_name: A string of the fully qualified method name being called.
   """
-  __metaclass__ = abc.ABCMeta
 
 
-class GRPCAuthMetadataPluginCallback(object):
+class GRPCAuthMetadataPluginCallback(six.with_metaclass(abc.ABCMeta)):
   """Callback object received by a metadata plugin."""
-  __metaclass__ = abc.ABCMeta
 
   def __call__(self, metadata, error):
     """Inform the gRPC runtime of the metadata to construct a CallCredentials.
@@ -130,10 +130,9 @@ class GRPCAuthMetadataPluginCallback(object):
     raise NotImplementedError()
 
 
-class GRPCAuthMetadataPlugin(object):
+class GRPCAuthMetadataPlugin(six.with_metaclass(abc.ABCMeta)):
   """
   """
-  __metaclass__ = abc.ABCMeta
 
   def __call__(self, context, callback):
     """Invoke the plugin.
@@ -149,9 +148,8 @@ class GRPCAuthMetadataPlugin(object):
     raise NotImplementedError()
 
 
-class GRPCServicerContext(object):
+class GRPCServicerContext(six.with_metaclass(abc.ABCMeta)):
   """Exposes gRPC-specific options and behaviors to code servicing RPCs."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def peer(self):
@@ -168,9 +166,8 @@ class GRPCServicerContext(object):
     raise NotImplementedError()
 
 
-class GRPCInvocationContext(object):
+class GRPCInvocationContext(six.with_metaclass(abc.ABCMeta)):
   """Exposes gRPC-specific options and behaviors to code invoking RPCs."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def disable_next_request_compression(self):
@@ -178,9 +175,8 @@ class GRPCInvocationContext(object):
     raise NotImplementedError()
 
 
-class Server(object):
+class Server(six.with_metaclass(abc.ABCMeta)):
   """Services RPCs."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def add_insecure_port(self, address):
diff --git a/src/python/grpcio/grpc/framework/alpha/_face_utilities.py b/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
index fb0cfe426d0614f27f381e5dd2be0fd764e33647..b5e4133cadea2913a98d786d00f8bdbcfbd79d7a 100644
--- a/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
+++ b/src/python/grpcio/grpc/framework/alpha/_face_utilities.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -30,6 +30,8 @@
 import abc
 import collections
 
+import six
+
 # face_interfaces is referenced from specification in this module.
 from grpc.framework.common import cardinality
 from grpc.framework.face import interfaces as face_interfaces  # pylint: disable=unused-import
@@ -45,7 +47,7 @@ def _qualified_name(service_name, method_name):
 # TODO(nathaniel): This structure is getting bloated; it could be shrunk if
 # implementations._Stub used a generic rather than a dynamic underlying
 # face-layer stub.
-class InvocationBreakdown(object):
+class InvocationBreakdown(six.with_metaclass(abc.ABCMeta)):
   """An intermediate representation of invocation-side views of RPC methods.
 
   Attributes:
@@ -61,7 +63,6 @@ class InvocationBreakdown(object):
       to callable behavior to be used deserializing response values for the
       RPC.
   """
-  __metaclass__ = abc.ABCMeta
 
 
 class _EasyInvocationBreakdown(
@@ -73,7 +74,7 @@ class _EasyInvocationBreakdown(
   pass
 
 
-class ServiceBreakdown(object):
+class ServiceBreakdown(six.with_metaclass(abc.ABCMeta)):
   """An intermediate representation of service-side views of RPC methods.
 
   Attributes:
@@ -84,7 +85,6 @@ class ServiceBreakdown(object):
     response_serializers: A dictionary from service-qualified RPC method name
       to callable behavior to be used serializing response values for the RPC.
   """
-  __metaclass__ = abc.ABCMeta
 
 
 class _EasyServiceBreakdown(
@@ -111,7 +111,7 @@ def break_down_invocation(service_name, method_descriptions):
   face_cardinalities = {}
   request_serializers = {}
   response_deserializers = {}
-  for name, method_description in method_descriptions.iteritems():
+  for name, method_description in six.iteritems(method_descriptions):
     qualified_name = _qualified_name(service_name, name)
     method_cardinality = method_description.cardinality()
     cardinalities[name] = method_description.cardinality()
@@ -139,7 +139,7 @@ def break_down_service(service_name, method_descriptions):
   implementations = {}
   request_deserializers = {}
   response_serializers = {}
-  for name, method_description in method_descriptions.iteritems():
+  for name, method_description in six.iteritems(method_descriptions):
     qualified_name = _qualified_name(service_name, name)
     method_cardinality = method_description.cardinality()
     if method_cardinality is interfaces.Cardinality.UNARY_UNARY:
diff --git a/src/python/grpcio/grpc/framework/alpha/_reexport.py b/src/python/grpcio/grpc/framework/alpha/_reexport.py
index 198cb95ad5cb81cb2585b3650a29a32e998d2401..4ea0e94d80546ceb028099c2f70d11ec4ffea841 100644
--- a/src/python/grpcio/grpc/framework/alpha/_reexport.py
+++ b/src/python/grpcio/grpc/framework/alpha/_reexport.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+import six
+
 from grpc.framework.common import cardinality
 from grpc.framework.face import exceptions as face_exceptions
 from grpc.framework.face import interfaces as face_interfaces
@@ -181,7 +183,7 @@ def common_cardinality(early_adopter_cardinality):
 
 def common_cardinalities(early_adopter_cardinalities):
   common_cardinalities = {}
-  for name, early_adopter_cardinality in early_adopter_cardinalities.iteritems():
+  for name, early_adopter_cardinality in six.iteritems(early_adopter_cardinalities):
     common_cardinalities[name] = _EARLY_ADOPTER_CARDINALITY_TO_COMMON_CARDINALITY[
         early_adopter_cardinality]
   return common_cardinalities
diff --git a/src/python/grpcio/grpc/framework/alpha/exceptions.py b/src/python/grpcio/grpc/framework/alpha/exceptions.py
index 5234d3b91cebbffc07efa29c8738614ec2196460..8ec260488e8cfa8b12af09852899e05ea9e4f19f 100644
--- a/src/python/grpcio/grpc/framework/alpha/exceptions.py
+++ b/src/python/grpcio/grpc/framework/alpha/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,12 @@
 
 Only GRPC should instantiate and raise these exceptions.
 """
-
 import abc
 
+import six
 
-class RpcError(Exception):
+class RpcError(six.with_metaclass(abc.ABCMeta, Exception)):
   """Common super type for all exceptions raised by GRPC."""
-  __metaclass__ = abc.ABCMeta
 
 
 class CancellationError(RpcError):
diff --git a/src/python/grpcio/grpc/framework/alpha/interfaces.py b/src/python/grpcio/grpc/framework/alpha/interfaces.py
index 8380567c97205dfa35676a314e92578e0f3631f4..cb6d58bb2ec2d11fc2d19129ab32efb3f2c179b8 100644
--- a/src/python/grpcio/grpc/framework/alpha/interfaces.py
+++ b/src/python/grpcio/grpc/framework/alpha/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import abc
 import enum
 
+import six
+
 # exceptions is referenced from specification in this module.
 from grpc.framework.alpha import exceptions  # pylint: disable=unused-import
 from grpc.framework.foundation import activated
@@ -59,15 +61,17 @@ class Abortion(enum.Enum):
   SERVICER_FAILURE = 'servicer failure'
 
 
-class CancellableIterator(object):
+class CancellableIterator(six.with_metaclass(abc.ABCMeta)):
   """Implements the Iterator protocol and affords a cancel method."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __iter__(self):
     """Returns the self object in accordance with the Iterator protocol."""
     raise NotImplementedError()
 
+  def __next__(self):
+    return self.next()
+
   @abc.abstractmethod
   def next(self):
     """Returns a value or raises StopIteration per the Iterator protocol."""
@@ -79,9 +83,8 @@ class CancellableIterator(object):
     raise NotImplementedError()
 
 
-class RpcContext(object):
+class RpcContext(six.with_metaclass(abc.ABCMeta)):
   """Provides RPC-related information and action."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def is_active(self):
@@ -108,7 +111,7 @@ class RpcContext(object):
     raise NotImplementedError()
 
 
-class UnaryUnarySyncAsync(object):
+class UnaryUnarySyncAsync(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-unary RPC synchronously or asynchronously.
   Values implementing this interface are directly callable and present an
   "async" method. Both calls take a request value and a numeric timeout.
@@ -117,7 +120,6 @@ class UnaryUnarySyncAsync(object):
   of a value of this type invokes its associated RPC and immediately returns a
   future.Future bound to the asynchronous execution of the RPC.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request, timeout):
@@ -147,7 +149,7 @@ class UnaryUnarySyncAsync(object):
     raise NotImplementedError()
 
 
-class StreamUnarySyncAsync(object):
+class StreamUnarySyncAsync(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a stream-unary RPC synchronously or asynchronously.
   Values implementing this interface are directly callable and present an
   "async" method. Both calls take an iterator of request values and a numeric
@@ -156,7 +158,6 @@ class StreamUnarySyncAsync(object):
   of a value of this type invokes its associated RPC and immediately returns a
   future.Future bound to the asynchronous execution of the RPC.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request_iterator, timeout):
@@ -191,9 +192,8 @@ class StreamUnarySyncAsync(object):
     raise NotImplementedError()
 
 
-class RpcMethodDescription(object):
+class RpcMethodDescription(six.with_metaclass(abc.ABCMeta)):
   """A type for the common aspects of RPC method descriptions."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def cardinality(self):
@@ -207,9 +207,8 @@ class RpcMethodDescription(object):
     raise NotImplementedError()
 
 
-class RpcMethodInvocationDescription(RpcMethodDescription):
+class RpcMethodInvocationDescription(six.with_metaclass(abc.ABCMeta, RpcMethodDescription)):
   """Invocation-side description of an RPC method."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def serialize_request(self, request):
@@ -240,9 +239,8 @@ class RpcMethodInvocationDescription(RpcMethodDescription):
     raise NotImplementedError()
 
 
-class RpcMethodServiceDescription(RpcMethodDescription):
+class RpcMethodServiceDescription(six.with_metaclass(abc.ABCMeta, RpcMethodDescription)):
   """Service-side description of an RPC method."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def deserialize_request(self, serialized_request):
@@ -345,7 +343,7 @@ class RpcMethodServiceDescription(RpcMethodDescription):
     raise NotImplementedError()
 
 
-class Stub(object):
+class Stub(six.with_metaclass(abc.ABCMeta)):
   """A stub with callable RPC method names for attributes.
 
   Instances of this type are context managers and only afford RPC invocation
@@ -369,12 +367,10 @@ class Stub(object):
   exceptions.RpcError, exceptions.CancellationError,
   and exceptions.ExpirationError.
   """
-  __metaclass__ = abc.ABCMeta
 
 
-class Server(activated.Activated):
+class Server(six.with_metaclass(abc.ABCMeta, activated.Activated)):
   """A GRPC Server."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def port(self):
diff --git a/src/python/grpcio/grpc/framework/base/_ingestion.py b/src/python/grpcio/grpc/framework/base/_ingestion.py
index 06d5b92f0b3fbcbd3ee4afd810a58afad22d4595..090cb158c94cec7e018ce9c62fb66dcd3a023768 100644
--- a/src/python/grpcio/grpc/framework/base/_ingestion.py
+++ b/src/python/grpcio/grpc/framework/base/_ingestion.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import abc
 import collections
 
+import six
+
 from grpc.framework.base import _constants
 from grpc.framework.base import _interfaces
 from grpc.framework.base import exceptions
@@ -72,9 +74,8 @@ class _EmptyConsumer(stream.Consumer):
     """See stream.Consumer.consume_and_terminate for specification."""
 
 
-class _ConsumerCreator(object):
+class _ConsumerCreator(six.with_metaclass(abc.ABCMeta)):
   """Common specification of different consumer-creating behavior."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def create_consumer(self, requirement):
diff --git a/src/python/grpcio/grpc/framework/base/_interfaces.py b/src/python/grpcio/grpc/framework/base/_interfaces.py
index d88cf76590e3039a4b22ff7efb3f0a5674b50a35..c0cc866cad47e65d9ac99c0c594555fd73280774 100644
--- a/src/python/grpcio/grpc/framework/base/_interfaces.py
+++ b/src/python/grpcio/grpc/framework/base/_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,15 @@
 
 import abc
 
+import six
+
 # interfaces is referenced from specification in this module.
 from grpc.framework.base import interfaces  # pylint: disable=unused-import
 from grpc.framework.foundation import stream
 
 
-class TerminationManager(object):
+class TerminationManager(six.with_metaclass(abc.ABCMeta)):
   """An object responsible for handling the termination of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_expiration_manager(self, expiration_manager):
@@ -91,9 +92,8 @@ class TerminationManager(object):
     raise NotImplementedError()
 
 
-class TransmissionManager(object):
+class TransmissionManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for transmitting to the other end of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def inmit(self, emission, complete):
@@ -117,9 +117,8 @@ class TransmissionManager(object):
     raise NotImplementedError()
 
 
-class EmissionManager(stream.Consumer):
+class EmissionManager(six.with_metaclass(abc.ABCMeta, stream.Consumer)):
   """A manager of values emitted by customer code."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_ingestion_manager_and_expiration_manager(
@@ -166,9 +165,8 @@ class EmissionManager(stream.Consumer):
     raise NotImplementedError()
 
 
-class IngestionManager(stream.Consumer):
+class IngestionManager(six.with_metaclass(abc.ABCMeta, stream.Consumer)):
   """A manager responsible for executing customer code."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_expiration_manager(self, expiration_manager):
@@ -214,9 +212,8 @@ class IngestionManager(stream.Consumer):
     raise NotImplementedError()
 
 
-class ExpirationManager(object):
+class ExpirationManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for aborting the operation if it runs out of time."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def change_timeout(self, timeout):
@@ -246,9 +243,8 @@ class ExpirationManager(object):
     raise NotImplementedError()
 
 
-class ReceptionManager(object):
+class ReceptionManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for receiving tickets from the other end."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def receive_ticket(self, ticket):
@@ -261,9 +257,8 @@ class ReceptionManager(object):
     raise NotImplementedError()
 
 
-class CancellationManager(object):
+class CancellationManager(six.with_metaclass(abc.ABCMeta)):
   """A manager of operation cancellation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def cancel(self):
diff --git a/src/python/grpcio/grpc/framework/base/_reception.py b/src/python/grpcio/grpc/framework/base/_reception.py
index dd428964f1558e1db8e443cc7ab371946c4c718d..2bee3947f0af0e9b802c10eff7840831ca1412cc 100644
--- a/src/python/grpcio/grpc/framework/base/_reception.py
+++ b/src/python/grpcio/grpc/framework/base/_reception.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 from grpc.framework.base import interfaces
 from grpc.framework.base import _interfaces
 
@@ -40,9 +42,8 @@ _INITIAL_FRONT_TO_BACK_TICKET_KINDS = (
 )
 
 
-class _Receiver(object):
+class _Receiver(six.with_metaclass(abc.ABCMeta)):
   """Common specification of different ticket-handling behavior."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def abort_if_abortive(self, ticket):
diff --git a/src/python/grpcio/grpc/framework/base/_transmission.py b/src/python/grpcio/grpc/framework/base/_transmission.py
index 684512923443a8ca4e85ec5989762f77180cdd04..398faaf3146a6e170f3cd12b857257b70b7606c1 100644
--- a/src/python/grpcio/grpc/framework/base/_transmission.py
+++ b/src/python/grpcio/grpc/framework/base/_transmission.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 from grpc.framework.base import _constants
 from grpc.framework.base import _interfaces
 from grpc.framework.base import interfaces
@@ -77,9 +79,8 @@ _ABORTION_OUTCOME_TO_BACK_TO_FRONT_TICKET_KIND = {
 }
 
 
-class _Ticketizer(object):
+class _Ticketizer(six.with_metaclass(abc.ABCMeta)):
   """Common specification of different ticket-creating behavior."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def ticketize(self, operation_id, sequence_number, payload, complete):
@@ -187,9 +188,8 @@ class _BackTicketizer(_Ticketizer):
           operation_id, sequence_number, kind, None)
 
 
-class TransmissionManager(_interfaces.TransmissionManager):
+class TransmissionManager(six.with_metaclass(abc.ABCMeta, _interfaces.TransmissionManager)):
   """A _interfaces.TransmissionManager on which other managers may be set."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_ingestion_and_expiration_managers(
diff --git a/src/python/grpcio/grpc/framework/base/interfaces.py b/src/python/grpcio/grpc/framework/base/interfaces.py
index e22c10d9750625b9e34590dc6275d5d4ceeee5cd..7c58a23ce05d78583a2115a4b436d6669560d8e3 100644
--- a/src/python/grpcio/grpc/framework/base/interfaces.py
+++ b/src/python/grpcio/grpc/framework/base/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@ import abc
 import collections
 import enum
 
+import six
+
 # stream is referenced from specification in this module.
 from grpc.framework.foundation import stream  # pylint: disable=unused-import
 
@@ -50,13 +52,12 @@ class Outcome(enum.Enum):
   SERVICED_FAILURE = 'serviced failure'
 
 
-class OperationContext(object):
+class OperationContext(six.with_metaclass(abc.ABCMeta)):
   """Provides operation-related information and action.
 
   Attributes:
     trace_id: A uuid.UUID identifying a particular set of related operations.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def is_active(self):
@@ -93,9 +94,8 @@ class OperationContext(object):
     raise NotImplementedError()
 
 
-class Servicer(object):
+class Servicer(six.with_metaclass(abc.ABCMeta)):
   """Interface for service implementations."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def service(self, name, context, output_consumer):
@@ -120,7 +120,7 @@ class Servicer(object):
     raise NotImplementedError()
 
 
-class Operation(object):
+class Operation(six.with_metaclass(abc.ABCMeta)):
   """Representation of an in-progress operation.
 
   Attributes:
@@ -129,7 +129,6 @@ class Operation(object):
     context: An OperationContext affording information and action about the
       operation.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def cancel(self):
@@ -137,9 +136,8 @@ class Operation(object):
     raise NotImplementedError()
 
 
-class ServicedIngestor(object):
+class ServicedIngestor(six.with_metaclass(abc.ABCMeta)):
   """Responsible for accepting the result of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def consumer(self, operation_context):
@@ -159,7 +157,7 @@ class ServicedIngestor(object):
     raise NotImplementedError()
 
 
-class ServicedSubscription(object):
+class ServicedSubscription(six.with_metaclass(abc.ABCMeta)):
   """A sum type representing a serviced's interest in an operation.
 
   Attributes:
@@ -167,7 +165,6 @@ class ServicedSubscription(object):
     ingestor: A ServicedIngestor. Must be present if kind is Kind.FULL. Must
       be None if kind is Kind.TERMINATION_ONLY or Kind.NONE.
   """
-  __metaclass__ = abc.ABCMeta
 
   @enum.unique
   class Kind(enum.Enum):
@@ -178,9 +175,8 @@ class ServicedSubscription(object):
     NONE = 'none'
 
 
-class End(object):
+class End(six.with_metaclass(abc.ABCMeta)):
   """Common type for entry-point objects on both sides of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def operation_stats(self):
@@ -202,9 +198,8 @@ class End(object):
     raise NotImplementedError()
 
 
-class Front(End):
+class Front(six.with_metaclass(abc.ABCMeta, End)):
   """Clientish objects that afford the invocation of operations."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def operate(
@@ -228,9 +223,8 @@ class Front(End):
     raise NotImplementedError()
 
 
-class Back(End):
+class Back(six.with_metaclass(abc.ABCMeta, End)):
   """Serverish objects that perform the work of operations."""
-  __metaclass__ = abc.ABCMeta
 
 
 class FrontToBackTicket(
@@ -315,9 +309,8 @@ class BackToFrontTicket(
     TRANSMISSION_FAILURE = 'transmission failure'
 
 
-class ForeLink(object):
+class ForeLink(six.with_metaclass(abc.ABCMeta)):
   """Accepts back-to-front tickets and emits front-to-back tickets."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def accept_back_to_front_ticket(self, ticket):
@@ -334,9 +327,8 @@ class ForeLink(object):
     raise NotImplementedError()
 
 
-class RearLink(object):
+class RearLink(six.with_metaclass(abc.ABCMeta)):
   """Accepts front-to-back tickets and emits back-to-front tickets."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def accept_front_to_back_ticket(self, ticket):
@@ -353,11 +345,9 @@ class RearLink(object):
     raise NotImplementedError()
 
 
-class FrontLink(Front, ForeLink):
+class FrontLink(six.with_metaclass(abc.ABCMeta, Front, ForeLink)):
   """Clientish objects that operate by sending and receiving tickets."""
-  __metaclass__ = abc.ABCMeta
 
 
-class BackLink(Back, RearLink):
+class BackLink(six.with_metaclass(abc.ABCMeta, Back, RearLink)):
   """Serverish objects that operate by sending and receiving tickets."""
-  __metaclass__ = abc.ABCMeta
diff --git a/src/python/grpcio/grpc/framework/core/_end.py b/src/python/grpcio/grpc/framework/core/_end.py
index 9c615672aa71ee843f976cce15b97f68012bb6e1..dc2f48589ad5bbe0f6ef0834011f2b1910a6bb33 100644
--- a/src/python/grpcio/grpc/framework/core/_end.py
+++ b/src/python/grpcio/grpc/framework/core/_end.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@ import abc
 import threading
 import uuid
 
+import six
+
 from grpc.framework.core import _operation
 from grpc.framework.core import _utilities
 from grpc.framework.foundation import callable_util
@@ -45,7 +47,7 @@ from grpc.framework.interfaces.links import utilities
 _IDLE_ACTION_EXCEPTION_LOG_MESSAGE = 'Exception calling idle action!'
 
 
-class End(base.End, links.Link):
+class End(six.with_metaclass(abc.ABCMeta, base.End, links.Link)):
   """A bridge between base.End and links.Link.
 
   Implementations of this interface translate arriving tickets into
@@ -53,7 +55,6 @@ class End(base.End, links.Link):
   translate calls from application objects implementing base interfaces
   into tickets sent to a joined link.
   """
-  __metaclass__ = abc.ABCMeta
 
 
 class _Cycle(object):
diff --git a/src/python/grpcio/grpc/framework/core/_ingestion.py b/src/python/grpcio/grpc/framework/core/_ingestion.py
index 4129a8ce43e10ee8d6e4217013371faf34998348..1e1fd73ce437db525b7485c9d6e8bed5d4679e94 100644
--- a/src/python/grpcio/grpc/framework/core/_ingestion.py
+++ b/src/python/grpcio/grpc/framework/core/_ingestion.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@ import abc
 import collections
 import enum
 
+import six
+
 from grpc.framework.core import _constants
 from grpc.framework.core import _interfaces
 from grpc.framework.core import _utilities
@@ -70,9 +72,8 @@ class _SubscriptionCreation(
     ABANDONED = 'abandoned'
 
 
-class _SubscriptionCreator(object):
+class _SubscriptionCreator(six.with_metaclass(abc.ABCMeta)):
   """Common specification of subscription-creating behavior."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def create(self, group, method):
diff --git a/src/python/grpcio/grpc/framework/core/_interfaces.py b/src/python/grpcio/grpc/framework/core/_interfaces.py
index ffa686b2b79b75f79859077dbb29ad59be4d3874..985e5e8550acf69fadd15d638858b0e832487bad 100644
--- a/src/python/grpcio/grpc/framework/core/_interfaces.py
+++ b/src/python/grpcio/grpc/framework/core/_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,17 +31,18 @@
 
 import abc
 
+import six
+
 from grpc.framework.interfaces.base import base
 
 
-class TerminationManager(object):
+class TerminationManager(six.with_metaclass(abc.ABCMeta)):
   """An object responsible for handling the termination of an operation.
 
   Attributes:
     outcome: None if the operation is active or a base.Outcome value if it has
       terminated.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def add_callback(self, callback):
@@ -105,9 +106,8 @@ class TerminationManager(object):
     raise NotImplementedError()
 
 
-class TransmissionManager(object):
+class TransmissionManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for transmitting to the other end of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def kick_off(
@@ -171,9 +171,8 @@ class TransmissionManager(object):
     raise NotImplementedError()
 
 
-class ExpirationManager(object):
+class ExpirationManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for aborting the operation if it runs out of time."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def change_timeout(self, timeout):
@@ -203,9 +202,8 @@ class ExpirationManager(object):
     raise NotImplementedError()
 
 
-class ProtocolManager(object):
+class ProtocolManager(six.with_metaclass(abc.ABCMeta)):
   """A manager of protocol-specific values passing through an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_protocol_receiver(self, protocol_receiver):
@@ -228,9 +226,8 @@ class ProtocolManager(object):
     raise NotImplementedError()
 
 
-class EmissionManager(base.Operator):
+class EmissionManager(six.with_metaclass(abc.ABCMeta, base.Operator)):
   """A manager of values emitted by customer code."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def advance(
@@ -254,14 +251,13 @@ class EmissionManager(base.Operator):
     raise NotImplementedError()
 
 
-class IngestionManager(object):
+class IngestionManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for executing customer code.
 
   This name of this manager comes from its responsibility to pass successive
   values from the other side of the operation into the code of the local
   customer.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_group_and_method(self, group, method):
@@ -294,9 +290,8 @@ class IngestionManager(object):
     raise NotImplementedError()
 
 
-class ReceptionManager(object):
+class ReceptionManager(six.with_metaclass(abc.ABCMeta)):
   """A manager responsible for receiving tickets from the other end."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def receive_ticket(self, ticket):
@@ -308,7 +303,7 @@ class ReceptionManager(object):
     raise NotImplementedError()
 
 
-class Operation(object):
+class Operation(six.with_metaclass(abc.ABCMeta)):
   """An ongoing operation.
 
   Attributes:
@@ -316,7 +311,6 @@ class Operation(object):
     operator: A base.Operator object for the operation for use by the customer
       of the operation.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def handle_ticket(self, ticket):
diff --git a/src/python/grpcio/grpc/framework/core/_termination.py b/src/python/grpcio/grpc/framework/core/_termination.py
index 364158b2b8764003b89f0d93939d0ce8e8c7793b..e8c4ec60a323059da14797689489ef4ca2b6660f 100644
--- a/src/python/grpcio/grpc/framework/core/_termination.py
+++ b/src/python/grpcio/grpc/framework/core/_termination.py
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 from grpc.framework.core import _constants
 from grpc.framework.core import _interfaces
 from grpc.framework.core import _utilities
@@ -50,9 +52,8 @@ def _service_completion_predicate(
   return transmission_complete and ingestion_complete
 
 
-class TerminationManager(_interfaces.TerminationManager):
+class TerminationManager(six.with_metaclass(abc.ABCMeta, _interfaces.TerminationManager)):
   """A _interfaces.TransmissionManager on which another manager may be set."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_expiration_manager(self, expiration_manager):
diff --git a/src/python/grpcio/grpc/framework/crust/_control.py b/src/python/grpcio/grpc/framework/crust/_control.py
index 5e9efdf7322790c3f5c790907c30ed231fd5eefc..c27fc9106d51c69773de77108b21c5b5b42983b6 100644
--- a/src/python/grpcio/grpc/framework/crust/_control.py
+++ b/src/python/grpcio/grpc/framework/crust/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -405,6 +405,9 @@ class Rendezvous(base.Operator, future.Future, stream.Consumer, face.Call):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while True:
diff --git a/src/python/grpcio/grpc/framework/crust/implementations.py b/src/python/grpcio/grpc/framework/crust/implementations.py
index 4ebc4e9ae8599934dc334d44486fd12f8074f5a6..d0ecafcaf6815e4f4b06c50cc6339ef1b71b475f 100644
--- a/src/python/grpcio/grpc/framework/crust/implementations.py
+++ b/src/python/grpcio/grpc/framework/crust/implementations.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,6 +29,8 @@
 
 """Entry points into the Crust layer of RPC Framework."""
 
+import six
+
 from grpc.framework.common import cardinality
 from grpc.framework.common import style
 from grpc.framework.crust import _calls
@@ -271,7 +273,7 @@ class _DynamicStub(face.DynamicStub):
 
 def _adapt_method_implementations(method_implementations, pool):
   adapted_implementations = {}
-  for name, method_implementation in method_implementations.iteritems():
+  for name, method_implementation in six.iteritems(method_implementations):
     if method_implementation.style is style.Service.INLINE:
       if method_implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
         adapted_implementations[name] = _service.adapt_inline_unary_unary(
diff --git a/src/python/grpcio/grpc/framework/face/_control.py b/src/python/grpcio/grpc/framework/face/_control.py
index e918907b749461d4082259248e157691eaad4a7d..ec43203a25e7f27a6fc53dc493e70dd823a36456 100644
--- a/src/python/grpcio/grpc/framework/face/_control.py
+++ b/src/python/grpcio/grpc/framework/face/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -120,6 +120,9 @@ class Rendezvous(stream.Consumer):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while ((self._abortion is None) and
diff --git a/src/python/grpcio/grpc/framework/face/exceptions.py b/src/python/grpcio/grpc/framework/face/exceptions.py
index f112df70bc694ba0aed9e6f22067d086366a2d8d..c272ac75ab933375935e122869023791a6809845 100644
--- a/src/python/grpcio/grpc/framework/face/exceptions.py
+++ b/src/python/grpcio/grpc/framework/face/exceptions.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 
 class NoSuchMethodError(Exception):
   """Raised by customer code to indicate an unrecognized RPC method name.
@@ -49,12 +51,11 @@ class NoSuchMethodError(Exception):
     self.name = name
 
 
-class RpcError(Exception):
+class RpcError(six.with_metaclass(abc.ABCMeta, Exception)):
   """Common super type for all exceptions raised by the Face layer.
 
   Only RPC Framework should instantiate and raise these exceptions.
   """
-  __metaclass__ = abc.ABCMeta
 
 
 class CancellationError(RpcError):
diff --git a/src/python/grpcio/grpc/framework/face/implementations.py b/src/python/grpcio/grpc/framework/face/implementations.py
index 4a6de52974ed623ce557c15282971d56bfdb4dfe..9c75a5faf4bcabc2cc5f2a3956d55e8c83e313f1 100644
--- a/src/python/grpcio/grpc/framework/face/implementations.py
+++ b/src/python/grpcio/grpc/framework/face/implementations.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -29,6 +29,8 @@
 
 """Entry points into the Face layer of RPC Framework."""
 
+import six
+
 from grpc.framework.common import cardinality
 from grpc.framework.common import style
 from grpc.framework.base import exceptions as _base_exceptions
@@ -228,7 +230,7 @@ class _DynamicStub(interfaces.DynamicStub):
 
 def _adapt_method_implementations(method_implementations, pool):
   adapted_implementations = {}
-  for name, method_implementation in method_implementations.iteritems():
+  for name, method_implementation in six.iteritems(method_implementations):
     if method_implementation.style is style.Service.INLINE:
       if method_implementation.cardinality is cardinality.Cardinality.UNARY_UNARY:
         adapted_implementations[name] = _service.adapt_inline_value_in_value_out(
diff --git a/src/python/grpcio/grpc/framework/face/interfaces.py b/src/python/grpcio/grpc/framework/face/interfaces.py
index b7cc4c1169ab9e87ca29511105f8a227699c870f..9fc18d73bc4b9fc849000bd11e09bde64f10c5b7 100644
--- a/src/python/grpcio/grpc/framework/face/interfaces.py
+++ b/src/python/grpcio/grpc/framework/face/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import abc
 import enum
 
+import six
+
 # cardinality, style, exceptions, abandonment, future, and stream are
 # referenced from specification in this module.
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
@@ -52,15 +54,17 @@ class Abortion(enum.Enum):
   SERVICER_FAILURE = 'servicer failure'
 
 
-class CancellableIterator(object):
+class CancellableIterator(six.with_metaclass(abc.ABCMeta)):
   """Implements the Iterator protocol and affords a cancel method."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __iter__(self):
     """Returns the self object in accordance with the Iterator protocol."""
     raise NotImplementedError()
 
+  def __next__(self):
+    return self.next()
+
   @abc.abstractmethod
   def next(self):
     """Returns a value or raises StopIteration per the Iterator protocol."""
@@ -72,9 +76,8 @@ class CancellableIterator(object):
     raise NotImplementedError()
 
 
-class RpcContext(object):
+class RpcContext(six.with_metaclass(abc.ABCMeta)):
   """Provides RPC-related information and action."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def is_active(self):
@@ -103,13 +106,12 @@ class RpcContext(object):
     raise NotImplementedError()
 
 
-class Call(object):
+class Call(six.with_metaclass(abc.ABCMeta)):
   """Invocation-side representation of an RPC.
 
   Attributes:
     context: An RpcContext affording information about the RPC.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def cancel(self):
@@ -117,9 +119,8 @@ class Call(object):
     raise NotImplementedError()
 
 
-class UnaryUnaryMultiCallable(object):
+class UnaryUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-unary RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request, timeout):
@@ -171,9 +172,8 @@ class UnaryUnaryMultiCallable(object):
     raise NotImplementedError()
 
 
-class UnaryStreamMultiCallable(object):
+class UnaryStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-stream RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request, timeout):
@@ -209,9 +209,8 @@ class UnaryStreamMultiCallable(object):
     raise NotImplementedError()
 
 
-class StreamUnaryMultiCallable(object):
+class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a stream-unary RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request_iterator, timeout):
@@ -264,9 +263,8 @@ class StreamUnaryMultiCallable(object):
     raise NotImplementedError()
 
 
-class StreamStreamMultiCallable(object):
+class StreamStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a stream-stream RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request_iterator, timeout):
@@ -302,7 +300,7 @@ l    Args:
     raise NotImplementedError()
 
 
-class MethodImplementation(object):
+class MethodImplementation(six.with_metaclass(abc.ABCMeta)):
   """A sum type that describes an RPC method implementation.
 
   Attributes:
@@ -347,12 +345,10 @@ class MethodImplementation(object):
       is cardinality.Cardinality.STREAM_STREAM and style is
       style.Service.EVENT.
   """
-  __metaclass__ = abc.ABCMeta
 
 
-class MultiMethodImplementation(object):
+class MultiMethodImplementation(six.with_metaclass(abc.ABCMeta)):
   """A general type able to service many RPC methods."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def service(self, name, response_consumer, context):
@@ -381,9 +377,8 @@ class MultiMethodImplementation(object):
     raise NotImplementedError()
 
 
-class GenericStub(object):
+class GenericStub(six.with_metaclass(abc.ABCMeta)):
   """Affords RPC methods to callers."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def blocking_value_in_value_out(self, name, request, timeout):
@@ -622,7 +617,7 @@ class GenericStub(object):
     raise NotImplementedError()
 
 
-class DynamicStub(object):
+class DynamicStub(six.with_metaclass(abc.ABCMeta)):
   """A stub with RPC-method-bound multi-callable attributes.
 
   Instances of this type responsd to attribute access as follows: if the
@@ -637,4 +632,3 @@ class DynamicStub(object):
   the attribute will be a StreamStreamMultiCallable with which to invoke the
   RPC method.
   """
-  __metaclass__ = abc.ABCMeta
diff --git a/src/python/grpcio/grpc/framework/foundation/activated.py b/src/python/grpcio/grpc/framework/foundation/activated.py
index 426a71c7059eb7c866865c3d898e69eef504c6b6..9b49b6363c10f5dece70b003b3974f32374f6b27 100644
--- a/src/python/grpcio/grpc/framework/foundation/activated.py
+++ b/src/python/grpcio/grpc/framework/foundation/activated.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,14 +31,14 @@
 
 import abc
 
+import six
 
-class Activated(object):
+class Activated(six.with_metaclass(abc.ABCMeta)):
   """Interface for objects that may be started and stopped.
 
   Values implementing this type must also implement the context manager
   protocol.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __enter__(self):
diff --git a/src/python/grpcio/grpc/framework/foundation/callable_util.py b/src/python/grpcio/grpc/framework/foundation/callable_util.py
index 32b0751a01c3fc253ab6c6a9e4f6d9e09dd6cda7..e0a4cab7381fe532e9f1f217661e8489525e4530 100644
--- a/src/python/grpcio/grpc/framework/foundation/callable_util.py
+++ b/src/python/grpcio/grpc/framework/foundation/callable_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -35,8 +35,10 @@ import enum
 import functools
 import logging
 
+import six
 
-class Outcome(object):
+
+class Outcome(six.with_metaclass(abc.ABCMeta)):
   """A sum type describing the outcome of some call.
 
   Attributes:
@@ -47,7 +49,6 @@ class Outcome(object):
     exception: The exception raised by the call. Must be present if kind is
       Kind.RAISED.
   """
-  __metaclass__ = abc.ABCMeta
 
   @enum.unique
   class Kind(enum.Enum):
diff --git a/src/python/grpcio/grpc/framework/foundation/future.py b/src/python/grpcio/grpc/framework/foundation/future.py
index bfc16fc1eaa2f679933300512fa143ff8b5210f2..bb8ee3ad87164e77a630308c97819f94cbe7403e 100644
--- a/src/python/grpcio/grpc/framework/foundation/future.py
+++ b/src/python/grpcio/grpc/framework/foundation/future.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -49,6 +49,8 @@ built-in-but-only-in-3.3-and-later TimeoutError.
 
 import abc
 
+import six
+
 
 class TimeoutError(Exception):
   """Indicates that a particular call timed out."""
@@ -58,13 +60,12 @@ class CancelledError(Exception):
   """Indicates that the computation underlying a Future was cancelled."""
 
 
-class Future(object):
+class Future(six.with_metaclass(abc.ABCMeta)):
   """A representation of a computation in another control flow.
 
   Computations represented by a Future may be yet to be begun, may be ongoing,
   or may have already completed.
   """
-  __metaclass__ = abc.ABCMeta
 
   # NOTE(nathaniel): This isn't the return type that I would want to have if it
   # were up to me. Were this interface being written from scratch, the return
diff --git a/src/python/grpcio/grpc/framework/foundation/relay.py b/src/python/grpcio/grpc/framework/foundation/relay.py
index 9c23946552093dc27173bce191047d90e7926f2d..ff4e2275aefff2adabee5a19c1890345403a03b9 100644
--- a/src/python/grpcio/grpc/framework/foundation/relay.py
+++ b/src/python/grpcio/grpc/framework/foundation/relay.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -46,7 +46,6 @@ class Relay(object):
   would be no reason to use an implementation of this interface instead of a
   thread pool.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def add_value(self, value):
diff --git a/src/python/grpcio/grpc/framework/foundation/stream.py b/src/python/grpcio/grpc/framework/foundation/stream.py
index 75c0cf145b493d4b81e66c8ffc3da30c8d91483a..32a2e52aed9c6c53a8032abb7e59ed9430f55244 100644
--- a/src/python/grpcio/grpc/framework/foundation/stream.py
+++ b/src/python/grpcio/grpc/framework/foundation/stream.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,10 +31,10 @@
 
 import abc
 
+import six
 
-class Consumer(object):
+class Consumer(six.with_metaclass(abc.ABCMeta)):
   """Interface for consumers of finite streams of values or objects."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def consume(self, value):
diff --git a/src/python/grpcio/grpc/framework/foundation/stream_util.py b/src/python/grpcio/grpc/framework/foundation/stream_util.py
index 2210e4efcf03ba2d5efa43c2ed69553989784e1b..7d5977fbbdaec481282a8a92d663503cef477be0 100644
--- a/src/python/grpcio/grpc/framework/foundation/stream_util.py
+++ b/src/python/grpcio/grpc/framework/foundation/stream_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -83,6 +83,9 @@ class IterableConsumer(stream.Consumer):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while self._active and not self._values:
diff --git a/src/python/grpcio/grpc/framework/interfaces/base/base.py b/src/python/grpcio/grpc/framework/interfaces/base/base.py
index a1e70be5e8d419ecb9c2b63c0c39b458588fee89..69be37e7abf0b74c83ae98244176317aa8a02976 100644
--- a/src/python/grpcio/grpc/framework/interfaces/base/base.py
+++ b/src/python/grpcio/grpc/framework/interfaces/base/base.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -42,6 +42,8 @@ import abc
 import enum
 import threading  # pylint: disable=unused-import
 
+import six
+
 # abandonment is referenced from specification in this module.
 from grpc.framework.foundation import abandonment  # pylint: disable=unused-import
 
@@ -95,7 +97,7 @@ class Outcome(object):
     REMOTE_FAILURE = 'remote failure'
 
 
-class Completion(object):
+class Completion(six.with_metaclass(abc.ABCMeta)):
   """An aggregate of the values exchanged upon operation completion.
 
   Attributes:
@@ -103,12 +105,10 @@ class Completion(object):
     code: A code value for the operation.
     message: A message value for the operation.
   """
-  __metaclass__ = abc.ABCMeta
 
 
-class OperationContext(object):
+class OperationContext(six.with_metaclass(abc.ABCMeta)):
   """Provides operation-related information and action."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def outcome(self):
@@ -162,9 +162,8 @@ class OperationContext(object):
     raise NotImplementedError()
 
 
-class Operator(object):
+class Operator(six.with_metaclass(abc.ABCMeta)):
   """An interface through which to participate in an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def advance(
@@ -184,9 +183,8 @@ class Operator(object):
     """
     raise NotImplementedError()
 
-class ProtocolReceiver(object):
+class ProtocolReceiver(six.with_metaclass(abc.ABCMeta)):
   """A means of receiving protocol values during an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def context(self, protocol_context):
@@ -198,7 +196,7 @@ class ProtocolReceiver(object):
     raise NotImplementedError()
 
 
-class Subscription(object):
+class Subscription(six.with_metaclass(abc.ABCMeta)):
   """Describes customer code's interest in values from the other side.
 
   Attributes:
@@ -216,7 +214,6 @@ class Subscription(object):
       become available during the operation. Must be non-None if kind is
       Kind.FULL.
   """
-  __metaclass__ = abc.ABCMeta
 
   @enum.unique
   class Kind(enum.Enum):
@@ -226,9 +223,8 @@ class Subscription(object):
     FULL = 'full'
 
 
-class Servicer(object):
+class Servicer(six.with_metaclass(abc.ABCMeta)):
   """Interface for service implementations."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def service(self, group, method, context, output_operator):
@@ -255,9 +251,8 @@ class Servicer(object):
     raise NotImplementedError()
 
 
-class End(object):
+class End(six.with_metaclass(abc.ABCMeta)):
   """Common type for entry-point objects on both sides of an operation."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def start(self):
diff --git a/src/python/grpcio/grpc/framework/interfaces/face/face.py b/src/python/grpcio/grpc/framework/interfaces/face/face.py
index 404c3a7937aa58b9f958df1bab27977cc85e6128..b994acecac61fd38e6fa92fef5be35f1b28163c8 100644
--- a/src/python/grpcio/grpc/framework/interfaces/face/face.py
+++ b/src/python/grpcio/grpc/framework/interfaces/face/face.py
@@ -33,6 +33,8 @@ import abc
 import collections
 import enum
 
+import six
+
 # cardinality, style, abandonment, future, and stream are
 # referenced from specification in this module.
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
@@ -96,7 +98,7 @@ class Abortion(
     REMOTE_FAILURE = 'remote failure'
 
 
-class AbortionError(Exception):
+class AbortionError(six.with_metaclass(abc.ABCMeta, Exception)):
   """Common super type for exceptions indicating RPC abortion.
 
     initial_metadata: The initial metadata from the other side of the RPC or
@@ -108,7 +110,6 @@ class AbortionError(Exception):
     details: The details value from the other side of the RPC or None if no
       details value was received.
   """
-  __metaclass__ = abc.ABCMeta
 
   def __init__(self, initial_metadata, terminal_metadata, code, details):
     super(AbortionError, self).__init__()
@@ -150,9 +151,8 @@ class RemoteError(AbortionError):
   """Indicates that an RPC has terminated due to a remote defect."""
 
 
-class RpcContext(object):
+class RpcContext(six.with_metaclass(abc.ABCMeta)):
   """Provides RPC-related information and action."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def is_active(self):
@@ -199,9 +199,8 @@ class RpcContext(object):
     raise NotImplementedError()
 
 
-class Call(RpcContext):
+class Call(six.with_metaclass(abc.ABCMeta, RpcContext)):
   """Invocation-side utility object for an RPC."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def initial_metadata(self):
@@ -256,9 +255,8 @@ class Call(RpcContext):
     raise NotImplementedError()
 
 
-class ServicerContext(RpcContext):
+class ServicerContext(six.with_metaclass(abc.ABCMeta, RpcContext)):
   """A context object passed to method implementations."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def invocation_metadata(self):
@@ -326,9 +324,8 @@ class ServicerContext(RpcContext):
     raise NotImplementedError()
 
 
-class ResponseReceiver(object):
+class ResponseReceiver(six.with_metaclass(abc.ABCMeta)):
   """Invocation-side object used to accept the output of an RPC."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def initial_metadata(self, initial_metadata):
@@ -362,9 +359,8 @@ class ResponseReceiver(object):
     raise NotImplementedError()
 
 
-class UnaryUnaryMultiCallable(object):
+class UnaryUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-unary RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(
@@ -434,9 +430,8 @@ class UnaryUnaryMultiCallable(object):
     raise NotImplementedError()
 
 
-class UnaryStreamMultiCallable(object):
+class UnaryStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a unary-stream RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(self, request, timeout, metadata=None, protocol_options=None):
@@ -480,9 +475,8 @@ class UnaryStreamMultiCallable(object):
     raise NotImplementedError()
 
 
-class StreamUnaryMultiCallable(object):
+class StreamUnaryMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a stream-unary RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(
@@ -553,9 +547,8 @@ class StreamUnaryMultiCallable(object):
     raise NotImplementedError()
 
 
-class StreamStreamMultiCallable(object):
+class StreamStreamMultiCallable(six.with_metaclass(abc.ABCMeta)):
   """Affords invoking a stream-stream RPC in any call style."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def __call__(
@@ -600,7 +593,7 @@ class StreamStreamMultiCallable(object):
     raise NotImplementedError()
 
 
-class MethodImplementation(object):
+class MethodImplementation(six.with_metaclass(abc.ABCMeta)):
   """A sum type that describes a method implementation.
 
   Attributes:
@@ -643,12 +636,10 @@ class MethodImplementation(object):
       is cardinality.Cardinality.STREAM_STREAM and style is
       style.Service.EVENT.
   """
-  __metaclass__ = abc.ABCMeta
 
 
-class MultiMethodImplementation(object):
+class MultiMethodImplementation(six.with_metaclass(abc.ABCMeta)):
   """A general type able to service many methods."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def service(self, group, method, response_consumer, context):
@@ -678,9 +669,8 @@ class MultiMethodImplementation(object):
     raise NotImplementedError()
 
 
-class GenericStub(object):
+class GenericStub(six.with_metaclass(abc.ABCMeta)):
   """Affords RPC invocation via generic methods."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def blocking_unary_unary(
@@ -977,7 +967,7 @@ class GenericStub(object):
     raise NotImplementedError()
 
 
-class DynamicStub(object):
+class DynamicStub(six.with_metaclass(abc.ABCMeta)):
   """Affords RPC invocation via attributes corresponding to afforded methods.
 
   Instances of this type may be scoped to a single group so that attribute
@@ -993,4 +983,3 @@ class DynamicStub(object):
   if the requested attribute is the name of a stream-stream method, the value of
   the attribute will be a StreamStreamMultiCallable with which to invoke an RPC.
   """
-  __metaclass__ = abc.ABCMeta
diff --git a/src/python/grpcio/grpc/framework/interfaces/links/links.py b/src/python/grpcio/grpc/framework/interfaces/links/links.py
index 24f0e3b354517f90bb25ce53e1fd4e981c8a71be..808167935fb2dc59b4f1346abdffbfcb0ebb547d 100644
--- a/src/python/grpcio/grpc/framework/interfaces/links/links.py
+++ b/src/python/grpcio/grpc/framework/interfaces/links/links.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@ import abc
 import collections
 import enum
 
+import six
+
 
 class Protocol(collections.namedtuple('Protocol', ('kind', 'value',))):
   """A sum type for handles to a system that transmits tickets.
@@ -123,9 +125,8 @@ class Ticket(
     REMOTE_FAILURE = 'remote failure'
 
 
-class Link(object):
+class Link(six.with_metaclass(abc.ABCMeta)):
   """Accepts and emits tickets."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def accept_ticket(self, ticket):
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 31e16e04912bb623b93d915910fa6435678972ce..27cd8d60bcb863c8e7c7df3672cc04d88ddaee2d 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -76,10 +76,11 @@ CORE_SOURCE_FILES = [
   'src/core/support/wrap_memcpy.c',
   'src/core/census/grpc_context.c',
   'src/core/census/grpc_filter.c',
+  'src/core/census/grpc_plugin.c',
   'src/core/channel/channel_args.c',
   'src/core/channel/channel_stack.c',
+  'src/core/channel/channel_stack_builder.c',
   'src/core/channel/client_channel.c',
-  'src/core/channel/client_uchannel.c',
   'src/core/channel/compress_filter.c',
   'src/core/channel/connected_channel.c',
   'src/core/channel/http_client_filter.c',
@@ -107,9 +108,9 @@ CORE_SOURCE_FILES = [
   'src/core/compression/compression_algorithm.c',
   'src/core/compression/message_compress.c',
   'src/core/debug/trace.c',
-  'src/core/httpcli/format_request.c',
-  'src/core/httpcli/httpcli.c',
-  'src/core/httpcli/parser.c',
+  'src/core/http/format_request.c',
+  'src/core/http/httpcli.c',
+  'src/core/http/parser.c',
   'src/core/iomgr/closure.c',
   'src/core/iomgr/endpoint.c',
   'src/core/iomgr/endpoint_pair_posix.c',
@@ -144,6 +145,8 @@ CORE_SOURCE_FILES = [
   'src/core/iomgr/timer.c',
   'src/core/iomgr/timer_heap.c',
   'src/core/iomgr/udp_server.c',
+  'src/core/iomgr/unix_sockets_posix.c',
+  'src/core/iomgr/unix_sockets_posix_noop.c',
   'src/core/iomgr/wakeup_fd_eventfd.c',
   'src/core/iomgr/wakeup_fd_nospecial.c',
   'src/core/iomgr/wakeup_fd_pipe.c',
@@ -165,7 +168,9 @@ CORE_SOURCE_FILES = [
   'src/core/surface/channel.c',
   'src/core/surface/channel_connectivity.c',
   'src/core/surface/channel_create.c',
+  'src/core/surface/channel_init.c',
   'src/core/surface/channel_ping.c',
+  'src/core/surface/channel_stack_type.c',
   'src/core/surface/completion_queue.c',
   'src/core/surface/event_string.c',
   'src/core/surface/init.c',
@@ -173,7 +178,6 @@ CORE_SOURCE_FILES = [
   'src/core/surface/metadata_array.c',
   'src/core/surface/server.c',
   'src/core/surface/server_chttp2.c',
-  'src/core/surface/server_create.c',
   'src/core/surface/validate_metadata.c',
   'src/core/surface/version.c',
   'src/core/transport/byte_stream.c',
@@ -204,7 +208,7 @@ CORE_SOURCE_FILES = [
   'src/core/transport/static_metadata.c',
   'src/core/transport/transport.c',
   'src/core/transport/transport_op_string.c',
-  'src/core/httpcli/httpcli_security_connector.c',
+  'src/core/http/httpcli_security_connector.c',
   'src/core/security/b64.c',
   'src/core/security/client_auth_filter.c',
   'src/core/security/credentials.c',
diff --git a/src/python/grpcio/tests/__init__.py b/src/python/grpcio/tests/__init__.py
index b76b3985a192d275f2e2a99811d81fc1da6b3704..c3b80d766d86a1d7096f3ce5191b1919da7782d1 100644
--- a/src/python/grpcio/tests/__init__.py
+++ b/src/python/grpcio/tests/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+from __future__ import absolute_import
+
 from tests import _loader
 from tests import _runner
 
diff --git a/src/python/grpcio/tests/_loader.py b/src/python/grpcio/tests/_loader.py
index 6992029b5e801c0bedf17c89f30c7a6b7c56d054..2f9e5c660ecf0edafab00d6ecda356b818a6bea5 100644
--- a/src/python/grpcio/tests/_loader.py
+++ b/src/python/grpcio/tests/_loader.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+from __future__ import absolute_import
+
 import importlib
 import pkgutil
 import re
diff --git a/src/python/grpcio/tests/_result.py b/src/python/grpcio/tests/_result.py
index 0670be921f83eb362809430d9f0069eb0c7fafb3..065153f0c305bd769763b9359c9821881c407522 100644
--- a/src/python/grpcio/tests/_result.py
+++ b/src/python/grpcio/tests/_result.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -27,7 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import cStringIO as StringIO
+from __future__ import absolute_import
+
 import collections
 import itertools
 import traceback
@@ -35,6 +36,7 @@ import unittest
 from xml.etree import ElementTree
 
 import coverage
+from six import moves
 
 from tests import _loader
 
@@ -356,7 +358,7 @@ def _traceback_string(type, value, trace):
   Returns:
     str: Formatted exception descriptive string.
   """
-  buffer = StringIO.StringIO()
+  buffer = moves.cStringIO()
   traceback.print_exception(type, value, trace, file=buffer)
   return buffer.getvalue()
 
diff --git a/src/python/grpcio/tests/_runner.py b/src/python/grpcio/tests/_runner.py
index 3b5ca03dd9c478254ad894b50add3bcbf0282326..e899154b0bc48e7967a0e64775feedb08cc07048 100644
--- a/src/python/grpcio/tests/_runner.py
+++ b/src/python/grpcio/tests/_runner.py
@@ -27,7 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import cStringIO as StringIO
+from __future__ import absolute_import
+
 import collections
 import fcntl
 import multiprocessing
@@ -41,6 +42,8 @@ import time
 import unittest
 import uuid
 
+from six import moves
+
 from tests import _loader
 from tests import _result
 
@@ -143,7 +146,7 @@ class Runner(object):
                        for case in filtered_cases]
     case_id_by_case = dict((augmented_case.case, augmented_case.id)
                            for augmented_case in augmented_cases)
-    result_out = StringIO.StringIO()
+    result_out = moves.cStringIO()
     result = _result.TerminalResult(
         result_out, id_map=lambda case: case_id_by_case[case])
     stdout_pipe = CaptureFile(sys.stdout.fileno())
diff --git a/src/python/grpcio/tests/interop/methods.py b/src/python/grpcio/tests/interop/methods.py
index b3591aef7bcab8e3e84e22486c8db78155ab0dc3..1f5561c1f01fcd02a310e85d113941a933976eaa 100644
--- a/src/python/grpcio/tests/interop/methods.py
+++ b/src/python/grpcio/tests/interop/methods.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -173,6 +173,9 @@ class _Pipe(object):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while not self._values and self._open:
diff --git a/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
index f55a7a23eaea0eeabb71c8452c6baf9ddda903b7..c9f36636b5c040d8c76dc046519abc4dd83635e1 100644
--- a/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_adapter/_proto_scenarios.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,12 +32,13 @@
 import abc
 import threading
 
+import six
+
 from tests.unit._junkdrawer import math_pb2
 
 
-class ProtoScenario(object):
+class ProtoScenario(six.with_metaclass(abc.ABCMeta)):
   """An RPC test scenario using protocol buffers."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def method(self):
diff --git a/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
index efc990421a3f2a4ca415526d1713d3e2df224c34..881633754c1a1412da95ecb57838f84ddd785f76 100644
--- a/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
+++ b/src/python/grpcio/tests/unit/_core_over_links_base_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -35,6 +35,8 @@ import random
 import time
 import unittest
 
+import six
+
 from grpc._adapter import _intermediary_low
 from grpc._links import invocation
 from grpc._links import service
@@ -68,7 +70,7 @@ def _serialization_behaviors_from_serializations(serializations):
   request_deserializers = {}
   response_serializers = {}
   response_deserializers = {}
-  for (group, method), serialization in serializations.iteritems():
+  for (group, method), serialization in six.iteritems(serializations):
     request_serializers[group, method] = serialization.serialize_request
     request_deserializers[group, method] = serialization.deserialize_request
     response_serializers[group, method] = serialization.serialize_response
diff --git a/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
index 4faaaadc2b5aac00f8727b1dfe19ac634c019ae6..3be3b051fbde4662d211ebb54f31584a6c101dae 100644
--- a/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/_crust_over_core_over_links_face_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import collections
 import unittest
 
+import six
+
 from grpc._adapter import _intermediary_low
 from grpc._links import invocation
 from grpc._links import service
@@ -59,7 +61,7 @@ def _serialization_behaviors_from_test_methods(test_methods):
   request_deserializers = {}
   response_serializers = {}
   response_deserializers = {}
-  for (group, method), test_method in test_methods.iteritems():
+  for (group, method), test_method in six.iteritems(test_methods):
     request_serializers[group, method] = test_method.serialize_request
     request_deserializers[group, method] = test_method.deserialize_request
     response_serializers[group, method] = test_method.serialize_response
@@ -108,7 +110,7 @@ class _Implementation(test_interfaces.Implementation):
     # _digest.TestServiceDigest.
     cardinalities = {
         method: method_object.cardinality()
-        for (group, method), method_object in methods.iteritems()}
+        for (group, method), method_object in six.iteritems(methods)}
     dynamic_stub = crust_implementations.dynamic_stub(
         invocation_end_link, group, cardinalities, pool)
 
diff --git a/src/python/grpcio/tests/unit/_links/_proto_scenarios.py b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
index f69ff51b1679956cf3a945fa45136a289cb3c70b..acd4891390ded6fd27bb37cbce79b5b70d491625 100644
--- a/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
+++ b/src/python/grpcio/tests/unit/_links/_proto_scenarios.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,13 +32,14 @@
 import abc
 import threading
 
+import six
+
 from tests.unit._junkdrawer import math_pb2
 from tests.unit.framework.common import test_constants
 
 
-class ProtoScenario(object):
+class ProtoScenario(six.with_metaclass(abc.ABCMeta)):
   """An RPC test scenario using protocol buffers."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def group_and_method(self):
diff --git a/src/python/grpcio/tests/unit/beta/_beta_features_test.py b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
index ea44177b499d4d5aaa0aff826b3bc9cd7133c3f6..ebdedcc11ebfd2331a35ede1ccf3c9c62b31a2e4 100644
--- a/src/python/grpcio/tests/unit/beta/_beta_features_test.py
+++ b/src/python/grpcio/tests/unit/beta/_beta_features_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -125,6 +125,9 @@ class _BlockingIterator(object):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while True:
diff --git a/src/python/grpcio/tests/unit/beta/_face_interface_test.py b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
index 1c21dfd03d59f85679d135ae58617ea81cd31152..cb302bbf684db2c6fa9fed88986de39e3737929c 100644
--- a/src/python/grpcio/tests/unit/beta/_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/beta/_face_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import collections
 import unittest
 
+import six
+
 from grpc.beta import implementations
 from grpc.beta import interfaces
 from tests.unit import resources
@@ -57,7 +59,7 @@ def _serialization_behaviors_from_test_methods(test_methods):
   request_deserializers = {}
   response_serializers = {}
   response_deserializers = {}
-  for (group, method), test_method in test_methods.iteritems():
+  for (group, method), test_method in six.iteritems(test_methods):
     request_serializers[group, method] = test_method.serialize_request
     request_deserializers[group, method] = test_method.deserialize_request
     response_serializers[group, method] = test_method.serialize_response
@@ -79,7 +81,7 @@ class _Implementation(test_interfaces.Implementation):
     # _digest.TestServiceDigest.
     cardinalities = {
         method: method_object.cardinality()
-        for (group, method), method_object in methods.iteritems()}
+        for (group, method), method_object in six.iteritems(methods)}
 
     server_options = implementations.server_options(
         request_deserializers=serialization_behaviors.request_deserializers,
diff --git a/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
index 360ecc95d5d98f598d9bd9ef42789fb7da95fda1..fd2d4298f9ad84d0d9207be4c16f79a87f8d41e1 100644
--- a/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
+++ b/src/python/grpcio/tests/unit/framework/_crust_over_core_face_interface_test.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import collections
 import unittest
 
+import six
+
 from grpc.framework.core import implementations as core_implementations
 from grpc.framework.crust import implementations as crust_implementations
 from grpc.framework.foundation import logging_pool
@@ -66,7 +68,7 @@ class _Implementation(test_interfaces.Implementation):
     # _digest.TestServiceDigest.
     cardinalities = {
         method: method_object.cardinality()
-        for (group, method), method_object in methods.iteritems()}
+        for (group, method), method_object in six.iteritems(methods)}
     dynamic_stub = crust_implementations.dynamic_stub(
         invocation_end_link, group, cardinalities, pool)
 
diff --git a/src/python/grpcio/tests/unit/framework/common/test_control.py b/src/python/grpcio/tests/unit/framework/common/test_control.py
index 8d6eba5c2caabce420300af00b97a709facf0a05..0387668b112644c3bf5fceee2726fd73cb5cad68 100644
--- a/src/python/grpcio/tests/unit/framework/common/test_control.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@ import abc
 import contextlib
 import threading
 
+import six
+
 
 class Defect(Exception):
   """Simulates a programming defect raised into in a system under test.
@@ -42,7 +44,7 @@ class Defect(Exception):
   """
 
 
-class Control(object):
+class Control(six.with_metaclass(abc.ABCMeta)):
   """An object that accepts program control from a system under test.
 
   Systems under test passed a Control should call its control() method
@@ -51,8 +53,6 @@ class Control(object):
   the system under test to simulate hanging, failing, or functioning.
   """
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def control(self):
     """Potentially does anything."""
diff --git a/src/python/grpcio/tests/unit/framework/common/test_coverage.py b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
index a7ed3582c40bc2ea85d76df4d90e8c1e5fc43c9c..184621fb5c442952dccd89dfb80ca92152a4c67c 100644
--- a/src/python/grpcio/tests/unit/framework/common/test_coverage.py
+++ b/src/python/grpcio/tests/unit/framework/common/test_coverage.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,14 @@
 
 import abc
 
+import six
+
 # This code is designed for use with the unittest module.
 # pylint: disable=invalid-name
 
 
-class Coverage(object):
+class Coverage(six.with_metaclass(abc.ABCMeta)):
   """Specification of test coverage."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def testSuccessfulUnaryRequestUnaryResponse(self):
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/base_util.py b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
index 1df1529b27c009cb0718ec443153df00f01a6552..60ab5bc0fe71570ccc674b863357b61e6b75f0da 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/base_util.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 # interfaces is referenced from specification in this module.
 from grpc.framework.base import util as _base_util
 from grpc.framework.base import implementations
@@ -43,7 +45,7 @@ _POOL_SIZE_LIMIT = 5
 _MAXIMUM_TIMEOUT = 90
 
 
-class LinkedPair(object):
+class LinkedPair(six.with_metaclass(abc.ABCMeta)):
   """A Front and Back that are linked to one another.
 
   Attributes:
@@ -51,8 +53,6 @@ class LinkedPair(object):
     back: An interfaces.Back.
   """
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def shut_down(self):
     """Shuts down this object and releases its resources."""
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
index 06135164215e1b2eba479fbda43fb3a20848ced4..b0b00bfa81a6cbbfdf7152a55125ef2aa48179a6 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/blocking_invocation_inline_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@
 import abc
 import unittest  # pylint: disable=unused-import
 
+import six
+
 from grpc.framework.face import exceptions
 from tests.unit.framework.common import test_constants
 from tests.unit.framework.face.testing import control
@@ -43,12 +45,12 @@ from tests.unit.framework.face.testing import test_case
 
 
 class BlockingInvocationInlineServiceTestCase(
-    test_case.FaceTestCase, coverage.BlockingCoverage):
+    six.with_metaclass(abc.ABCMeta,
+    test_case.FaceTestCase, coverage.BlockingCoverage)):
   """A test of the Face layer of RPC Framework.
 
   Concrete subclasses must also extend unittest.TestCase.
   """
-  __metaclass__ = abc.ABCMeta
 
   def setUp(self):
     """See unittest.TestCase.setUp for full specification.
@@ -72,7 +74,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testSuccessfulUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -83,7 +85,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -95,7 +97,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testSuccessfulStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -106,7 +108,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -118,7 +120,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testSequentialInvocations(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -135,7 +137,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testExpiredUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -146,7 +148,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testExpiredUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -158,7 +160,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testExpiredStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -169,7 +171,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testExpiredStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -181,7 +183,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testFailedUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -191,7 +193,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testFailedUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -202,7 +204,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testFailedStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -212,7 +214,7 @@ class BlockingInvocationInlineServiceTestCase(
 
   def testFailedStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/control.py b/src/python/grpcio/tests/unit/framework/face/testing/control.py
index 3960c4e649590db318223ac44a147c7bf3ffd919..0d40331e1977066e9f3e3c84414f9b186d36c9a2 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/control.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/control.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,8 +33,10 @@ import abc
 import contextlib
 import threading
 
+import six
 
-class Control(object):
+
+class Control(six.with_metaclass(abc.ABCMeta)):
   """An object that accepts program control from a system under test.
 
   Systems under test passed a Control should call its control() method
@@ -43,8 +45,6 @@ class Control(object):
   the system under test to simulate hanging, failing, or functioning.
   """
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def control(self):
     """Potentially does anything."""
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/coverage.py b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
index f3aca113fe722607d41ea0d50d8a68d474fafe8e..9f5381069d4b77a00c8fbfb6742d5968f5f09ec0 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/coverage.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,15 +31,15 @@
 
 import abc
 
+import six
+
 # These classes are only valid when inherited by unittest.TestCases.
 # pylint: disable=invalid-name
 
 
-class BlockingCoverage(object):
+class BlockingCoverage(six.with_metaclass(abc.ABCMeta)):
   """Specification of test coverage for blocking behaviors."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def testSuccessfulUnaryRequestUnaryResponse(self):
     raise NotImplementedError()
@@ -93,11 +93,9 @@ class BlockingCoverage(object):
     raise NotImplementedError()
 
 
-class FullCoverage(BlockingCoverage):
+class FullCoverage(six.with_metaclass(abc.ABCMeta, BlockingCoverage)):
   """Specification of test coverage for non-blocking behaviors."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def testParallelInvocations(self):
     raise NotImplementedError()
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/digest.py b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
index 39f28b9657f447e923743a8920d3df23d34f5c49..100067cc8334b991aa583433d0db8053a4197804 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/digest.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/digest.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import collections
 import threading
 
+import six
+
 # testing_control, interfaces, and testing_service are referenced from
 # specification in this module.
 from grpc.framework.common import cardinality
@@ -368,7 +370,7 @@ def _assemble(
   events = {}
   adaptations = {}
   messages = {}
-  for name, scenario in scenarios.iteritems():
+  for name, scenario in six.iteritems(scenarios):
     if name in names:
       raise ValueError('Repeated name "%s"!' % name)
 
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
index 179f3a2f67c18c82c57f3eacbc9aea1426fbe87f..db901cfe4ef03095ca8be893e889a8cd3094c454 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/event_invocation_synchronous_event_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import abc
 import unittest
 
+import six
+
 from grpc.framework.face import interfaces
 from tests.unit.framework.common import test_constants
 from tests.unit.framework.face.testing import callback as testing_callback
@@ -43,12 +45,12 @@ from tests.unit.framework.face.testing import test_case
 
 
 class EventInvocationSynchronousEventServiceTestCase(
-    test_case.FaceTestCase, coverage.FullCoverage):
+    six.with_metaclass(abc.ABCMeta,
+    test_case.FaceTestCase, coverage.FullCoverage)):
   """A test of the Face layer of RPC Framework.
 
   Concrete subclasses must also extend unittest.TestCase.
   """
-  __metaclass__ = abc.ABCMeta
 
   def setUp(self):
     """See unittest.TestCase.setUp for full specification.
@@ -72,7 +74,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testSuccessfulUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -87,7 +89,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -102,7 +104,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testSuccessfulStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -120,7 +122,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -138,7 +140,7 @@ class EventInvocationSynchronousEventServiceTestCase(
   def testSequentialInvocations(self):
     # pylint: disable=cell-var-from-loop
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -163,7 +165,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testExpiredUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -178,7 +180,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testExpiredUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -193,7 +195,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testExpiredStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for unused_test_messages in test_messages_sequence:
         callback = testing_callback.Callback()
 
@@ -206,7 +208,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testExpiredStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -221,7 +223,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testFailedUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -237,7 +239,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testFailedUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -253,7 +255,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testFailedStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -272,7 +274,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testFailedStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -289,7 +291,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testParallelInvocations(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         first_callback = testing_callback.Callback()
@@ -316,7 +318,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testCancelledUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -332,7 +334,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testCancelledUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = testing_callback.Callback()
@@ -347,7 +349,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testCancelledStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = testing_callback.Callback()
@@ -364,7 +366,7 @@ class EventInvocationSynchronousEventServiceTestCase(
 
   def testCancelledStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for unused_test_messages in test_messages_sequence:
         callback = testing_callback.Callback()
 
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
index 485524a3563fb7509819967e9bfa04531df2cb2e..d8706aa39ec3b8fbbf14b679d8b2b631dc8fb5cc 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/future_invocation_asynchronous_event_service_test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -34,6 +34,8 @@ import contextlib
 import threading
 import unittest
 
+import six
+
 from grpc.framework.face import exceptions
 from grpc.framework.foundation import future
 from grpc.framework.foundation import logging_pool
@@ -66,6 +68,9 @@ class _PauseableIterator(object):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while self._paused:
@@ -74,12 +79,12 @@ class _PauseableIterator(object):
 
 
 class FutureInvocationAsynchronousEventServiceTestCase(
-    test_case.FaceTestCase, coverage.FullCoverage):
+    six.with_metaclass(abc.ABCMeta,
+    test_case.FaceTestCase, coverage.FullCoverage)):
   """A test of the Face layer of RPC Framework.
 
   Concrete subclasses must also extend unittest.TestCase.
   """
-  __metaclass__ = abc.ABCMeta
 
   def setUp(self):
     """See unittest.TestCase.setUp for full specification.
@@ -105,7 +110,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testSuccessfulUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -117,7 +122,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -129,7 +134,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testSuccessfulStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         request_iterator = _PauseableIterator(iter(requests))
@@ -145,7 +150,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         request_iterator = _PauseableIterator(iter(requests))
@@ -161,7 +166,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testSequentialInvocations(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -180,7 +185,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testExpiredUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -195,7 +200,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testExpiredUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -207,7 +212,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testExpiredStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -222,7 +227,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testExpiredStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -234,7 +239,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testFailedUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -253,7 +258,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testFailedUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -268,7 +273,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testFailedStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -287,7 +292,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testFailedStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -302,7 +307,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testParallelInvocations(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -324,7 +329,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testCancelledUnaryRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -338,7 +343,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testCancelledUnaryRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -352,7 +357,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testCancelledStreamRequestUnaryResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -366,7 +371,7 @@ class FutureInvocationAsynchronousEventServiceTestCase(
 
   def testCancelledStreamRequestStreamResponse(self):
     for name, test_messages_sequence in (
-        self.digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self.digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
index 5932dabf1eb98d05a9a33ebfb8ce62d4269a1391..87be836e2d02c0d0469ed72ad7daa401b848d006 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,14 @@
 
 import abc
 
+import six
+
 # cardinality is referenced from specification in this module.
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
 
 
-class Method(object):
+class Method(six.with_metaclass(abc.ABCMeta)):
   """An RPC method to be used in tests of RPC implementations."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def name(self):
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/service.py b/src/python/grpcio/tests/unit/framework/face/testing/service.py
index ac0b89b6eefdabed66b105de77f8d548b29e56ea..dc0f204c04b01e37a6ccaaf8061bbb50c57e7b4e 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/service.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/service.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,16 @@
 
 import abc
 
+import six
+
 # interfaces is referenced from specification in this module.
 from grpc.framework.face import interfaces as face_interfaces  # pylint: disable=unused-import
 from tests.unit.framework.face.testing import interfaces
 
 
-class UnaryUnaryTestMethodImplementation(interfaces.Method):
+class UnaryUnaryTestMethodImplementation(six.with_metaclass(abc.ABCMeta, interfaces.Method)):
   """A controllable implementation of a unary-unary RPC method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, request, response_callback, context, control):
     """Services an RPC that accepts one message and produces one message.
@@ -59,11 +59,9 @@ class UnaryUnaryTestMethodImplementation(interfaces.Method):
     raise NotImplementedError()
 
 
-class UnaryUnaryTestMessages(object):
+class UnaryUnaryTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for unary-request-unary-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def request(self):
     """Affords a request message.
@@ -93,11 +91,9 @@ class UnaryUnaryTestMessages(object):
     raise NotImplementedError()
 
 
-class UnaryStreamTestMethodImplementation(interfaces.Method):
+class UnaryStreamTestMethodImplementation(six.with_metaclass(abc.ABCMeta, interfaces.Method)):
   """A controllable implementation of a unary-stream RPC method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, request, response_consumer, context, control):
     """Services an RPC that takes one message and produces a stream of messages.
@@ -116,11 +112,9 @@ class UnaryStreamTestMethodImplementation(interfaces.Method):
     raise NotImplementedError()
 
 
-class UnaryStreamTestMessages(object):
+class UnaryStreamTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for unary-request-stream-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def request(self):
     """Affords a request message.
@@ -150,11 +144,9 @@ class UnaryStreamTestMessages(object):
     raise NotImplementedError()
 
 
-class StreamUnaryTestMethodImplementation(interfaces.Method):
+class StreamUnaryTestMethodImplementation(six.with_metaclass(abc.ABCMeta, interfaces.Method)):
   """A controllable implementation of a stream-unary RPC method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, response_callback, context, control):
     """Services an RPC that takes a stream of messages and produces one message.
@@ -180,11 +172,9 @@ class StreamUnaryTestMethodImplementation(interfaces.Method):
     raise NotImplementedError()
 
 
-class StreamUnaryTestMessages(object):
+class StreamUnaryTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for stream-request-unary-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def requests(self):
     """Affords a sequence of request messages.
@@ -214,11 +204,9 @@ class StreamUnaryTestMessages(object):
     raise NotImplementedError()
 
 
-class StreamStreamTestMethodImplementation(interfaces.Method):
+class StreamStreamTestMethodImplementation(six.with_metaclass(abc.ABCMeta, interfaces.Method)):
   """A controllable implementation of a stream-stream RPC method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, response_consumer, context, control):
     """Services an RPC that accepts and produces streams of messages.
@@ -244,11 +232,9 @@ class StreamStreamTestMethodImplementation(interfaces.Method):
     raise NotImplementedError()
 
 
-class StreamStreamTestMessages(object):
+class StreamStreamTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for stream-request-stream-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def requests(self):
     """Affords a sequence of request messages.
@@ -278,11 +264,9 @@ class StreamStreamTestMessages(object):
     raise NotImplementedError()
 
 
-class TestService(object):
+class TestService(six.with_metaclass(abc.ABCMeta)):
   """A specification of implemented RPC methods to use in tests."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def name(self):
     """Identifies the RPC service name used during the test.
diff --git a/src/python/grpcio/tests/unit/framework/face/testing/test_case.py b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
index 23d4d919c2377ca7e3558a15368445f765445082..5be9330a77409e02ce336969cde11b8ebe9fa78a 100644
--- a/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
+++ b/src/python/grpcio/tests/unit/framework/face/testing/test_case.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,18 +31,19 @@
 
 import abc
 
+import six
+
 # face_interfaces and interfaces are referenced in specification in this module.
 from grpc.framework.face import interfaces as face_interfaces  # pylint: disable=unused-import
 from tests.unit.framework.face.testing import interfaces  # pylint: disable=unused-import
 
 
-class FaceTestCase(object):
+class FaceTestCase(six.with_metaclass(abc.ABCMeta)):
   """Describes a test of the Face Layer of RPC Framework.
 
   Concrete subclasses must also inherit from unittest.TestCase and from at least
   one class that defines test methods.
   """
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def set_up_implementation(
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
index 38102b198a70fc3e2ef59c627f03e8fe5e6a2052..fe69e63995bb40e904fd18f1027c2c1346489a58 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/_control.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -36,6 +36,8 @@ import random  # pylint: disable=unused-import
 import threading
 import time
 
+import six
+
 from grpc.framework.interfaces.base import base
 from tests.unit.framework.common import test_constants
 from tests.unit.framework.interfaces.base import _sequence
@@ -247,8 +249,7 @@ class Instruction(
     CONCLUDE = 'CONCLUDE'
 
 
-class Controller(object):
-  __metaclass__ = abc.ABCMeta
+class Controller(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def failed(self, message):
@@ -308,8 +309,7 @@ class Controller(object):
     raise NotImplementedError()
 
 
-class ControllerCreator(object):
-  __metaclass__ = abc.ABCMeta
+class ControllerCreator(six.with_metaclass(abc.ABCMeta)):
 
   @abc.abstractmethod
   def name(self):
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
index 84afd24d478a71f74c0c2493229e6f6a82626e9d..0594cfeb3145e033c5a20677db0a0bf5fb2cf0ba 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/base/test_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,12 +31,13 @@
 
 import abc
 
+import six
+
 from grpc.framework.interfaces.base import base  # pylint: disable=unused-import
 
 
-class Serialization(object):
+class Serialization(six.with_metaclass(abc.ABCMeta)):
   """Specifies serialization and deserialization of test payloads."""
-  __metaclass__ = abc.ABCMeta
 
   def serialize_request(self, request):
     """Serializes a request value used in a test.
@@ -85,9 +86,8 @@ class Serialization(object):
     raise NotImplementedError()
 
 
-class Implementation(object):
+class Implementation(six.with_metaclass(abc.ABCMeta)):
   """Specifies an implementation of the Base layer."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def instantiate(self, serializations, servicer):
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
index c8a3a1bc7499ae6a8311eea5aed668901ef9b700..530ba4ff0f8c539211083e9514102c16840eece5 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_blocking_invocation_inline_service.py
@@ -34,6 +34,8 @@ import itertools
 import unittest
 from concurrent import futures
 
+import six
+
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.face import face
@@ -46,14 +48,13 @@ from tests.unit.framework.interfaces.face import _stock_service
 from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 
-class TestCase(test_coverage.Coverage, unittest.TestCase):
+class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.TestCase)):
   """A test of the Face layer of RPC Framework.
 
   Concrete subclasses must have an "implementation" attribute of type
   test_interfaces.Implementation and an "invoker_constructor" attribute of type
   _invocation.InvokerConstructor.
   """
-  __metaclass__ = abc.ABCMeta
 
   NAME = 'BlockingInvocationInlineServiceTest'
 
@@ -81,7 +82,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -92,7 +93,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -104,7 +105,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -115,7 +116,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -127,7 +128,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSequentialInvocations(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -145,7 +146,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
   def testParallelInvocations(self):
     pool = logging_pool.pool(test_constants.PARALLELISM)
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = []
         response_futures = []
@@ -167,7 +168,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
   def testWaitingForSomeButNotAllParallelInvocations(self):
     pool = logging_pool.pool(test_constants.PARALLELISM)
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = []
         response_futures_to_indices = {}
@@ -205,7 +206,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -216,7 +217,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -228,7 +229,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -239,7 +240,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -251,7 +252,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -261,7 +262,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -272,7 +273,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -282,7 +283,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
index 9304b6b1db13d7ad3e77ffa5c4014eb6714be8a2..40c03f9e714e11dbbb5e7dc069c4fbbd368acd91 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_digest.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -32,6 +32,8 @@
 import collections
 import threading
 
+import six
+
 # test_control, _service, and test_interfaces are referenced from specification
 # in this module.
 from grpc.framework.common import cardinality
@@ -363,7 +365,7 @@ def _assemble(
   events = {}
   adaptations = {}
   messages = {}
-  for identifier, scenario in scenarios.iteritems():
+  for identifier, scenario in six.iteritems(scenarios):
     if identifier in identifiers:
       raise ValueError('Repeated identifier "(%s, %s)"!' % identifier)
 
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
index 1d36a931e8c1f1384c63a8a1c200a2c6efc990ee..89f344c289848897e7cc0f36b50c81f3fcdebd29 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py
@@ -36,6 +36,8 @@ import threading
 import unittest
 from concurrent import futures
 
+import six
+
 # test_interfaces is referenced from specification in this module.
 from grpc.framework.foundation import logging_pool
 from grpc.framework.interfaces.face import face
@@ -67,6 +69,9 @@ class _PauseableIterator(object):
   def __iter__(self):
     return self
 
+  def __next__(self):
+    return self.next()
+
   def next(self):
     with self._condition:
       while self._paused:
@@ -104,14 +109,13 @@ class _Callback(object):
           self._condition.wait()
 
 
-class TestCase(test_coverage.Coverage, unittest.TestCase):
+class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.TestCase)):
   """A test of the Face layer of RPC Framework.
 
   Concrete subclasses must have an "implementation" attribute of type
   test_interfaces.Implementation and an "invoker_constructor" attribute of type
   _invocation.InvokerConstructor.
   """
-  __metaclass__ = abc.ABCMeta
 
   NAME = 'FutureInvocationAsynchronousEventServiceTest'
 
@@ -141,7 +145,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
@@ -156,7 +160,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -168,7 +172,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         request_iterator = _PauseableIterator(iter(requests))
@@ -188,7 +192,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSuccessfulStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         request_iterator = _PauseableIterator(iter(requests))
@@ -204,7 +208,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testSequentialInvocations(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -223,7 +227,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testParallelInvocations(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         first_request = test_messages.request()
         second_request = test_messages.request()
@@ -239,7 +243,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
         test_messages.verify(second_request, second_response, self)
 
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = []
         response_futures = []
@@ -259,7 +263,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
   def testWaitingForSomeButNotAllParallelInvocations(self):
     pool = logging_pool.pool(test_constants.PARALLELISM)
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = []
         response_futures_to_indices = {}
@@ -281,7 +285,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testCancelledUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
@@ -298,7 +302,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testCancelledUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -312,7 +316,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testCancelledStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = _Callback()
@@ -329,7 +333,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testCancelledStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -343,7 +347,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
@@ -360,7 +364,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -372,7 +376,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = _Callback()
@@ -389,7 +393,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testExpiredStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
@@ -401,7 +405,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedUnaryRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
@@ -423,7 +427,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.unary_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         request = test_messages.request()
 
@@ -438,7 +442,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedStreamRequestUnaryResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_unary_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = _Callback()
@@ -460,7 +464,7 @@ class TestCase(test_coverage.Coverage, unittest.TestCase):
 
   def testFailedStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
+        six.iteritems(self._digest.stream_stream_messages_sequences)):
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
 
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
index 448e845a08ddb4859dea24d19515a2f09e3fc5f6..ff38dc2ece365f72e8b3dc2708e3ba6070d5c36f 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_invocation.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import abc
 
+import six
+
 from grpc.framework.common import cardinality
 
 _CARDINALITY_TO_GENERIC_BLOCKING_BEHAVIOR = {
@@ -62,9 +64,8 @@ _CARDINALITY_TO_MULTI_CALLABLE_ATTRIBUTE = {
 }
 
 
-class Invoker(object):
+class Invoker(six.with_metaclass(abc.ABCMeta)):
   """A type used to invoke test RPCs."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def blocking(self, group, name):
@@ -82,9 +83,8 @@ class Invoker(object):
     raise NotImplementedError()
 
 
-class InvokerConstructor(object):
+class InvokerConstructor(six.with_metaclass(abc.ABCMeta)):
   """A type used to create Invokers."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def name(self):
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
index 28941e2ad0319c02a74b49668044f67419d1dbb3..bec8d5113c17ac153bb31ff4311e24922ab702c7 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/_service.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,16 @@
 
 import abc
 
+import six
+
 # face is referenced from specification in this module.
 from grpc.framework.interfaces.face import face  # pylint: disable=unused-import
 from tests.unit.framework.interfaces.face import test_interfaces
 
 
-class UnaryUnaryTestMethodImplementation(test_interfaces.Method):
+class UnaryUnaryTestMethodImplementation(six.with_metaclass(abc.ABCMeta, test_interfaces.Method)):
   """A controllable implementation of a unary-unary method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, request, response_callback, context, control):
     """Services an RPC that accepts one message and produces one message.
@@ -59,11 +59,9 @@ class UnaryUnaryTestMethodImplementation(test_interfaces.Method):
     raise NotImplementedError()
 
 
-class UnaryUnaryTestMessages(object):
+class UnaryUnaryTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for unary-request-unary-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def request(self):
     """Affords a request message.
@@ -93,11 +91,9 @@ class UnaryUnaryTestMessages(object):
     raise NotImplementedError()
 
 
-class UnaryStreamTestMethodImplementation(test_interfaces.Method):
+class UnaryStreamTestMethodImplementation(six.with_metaclass(abc.ABCMeta, test_interfaces.Method)):
   """A controllable implementation of a unary-stream method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, request, response_consumer, context, control):
     """Services an RPC that takes one message and produces a stream of messages.
@@ -116,11 +112,9 @@ class UnaryStreamTestMethodImplementation(test_interfaces.Method):
     raise NotImplementedError()
 
 
-class UnaryStreamTestMessages(object):
+class UnaryStreamTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for unary-request-stream-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def request(self):
     """Affords a request message.
@@ -150,11 +144,9 @@ class UnaryStreamTestMessages(object):
     raise NotImplementedError()
 
 
-class StreamUnaryTestMethodImplementation(test_interfaces.Method):
+class StreamUnaryTestMethodImplementation(six.with_metaclass(abc.ABCMeta, test_interfaces.Method)):
   """A controllable implementation of a stream-unary method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, response_callback, context, control):
     """Services an RPC that takes a stream of messages and produces one message.
@@ -180,11 +172,9 @@ class StreamUnaryTestMethodImplementation(test_interfaces.Method):
     raise NotImplementedError()
 
 
-class StreamUnaryTestMessages(object):
+class StreamUnaryTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for stream-request-unary-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def requests(self):
     """Affords a sequence of request messages.
@@ -214,11 +204,9 @@ class StreamUnaryTestMessages(object):
     raise NotImplementedError()
 
 
-class StreamStreamTestMethodImplementation(test_interfaces.Method):
+class StreamStreamTestMethodImplementation(six.with_metaclass(abc.ABCMeta, test_interfaces.Method)):
   """A controllable implementation of a stream-stream method."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def service(self, response_consumer, context, control):
     """Services an RPC that accepts and produces streams of messages.
@@ -244,11 +232,9 @@ class StreamStreamTestMethodImplementation(test_interfaces.Method):
     raise NotImplementedError()
 
 
-class StreamStreamTestMessages(object):
+class StreamStreamTestMessages(six.with_metaclass(abc.ABCMeta)):
   """A type for stream-request-stream-response message pairings."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def requests(self):
     """Affords a sequence of request messages.
@@ -278,11 +264,9 @@ class StreamStreamTestMessages(object):
     raise NotImplementedError()
 
 
-class TestService(object):
+class TestService(six.with_metaclass(abc.ABCMeta)):
   """A specification of implemented methods to use in tests."""
 
-  __metaclass__ = abc.ABCMeta
-
   @abc.abstractmethod
   def unary_unary_scenarios(self):
     """Affords unary-request-unary-response test methods and their messages.
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
index b2b5c10fa6f733918509cf4bbb8cac0032bb5485..a5e28b79425d3e433cd3da7f8187a53786ea3857 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/face/test_interfaces.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,13 +31,14 @@
 
 import abc
 
+import six
+
 from grpc.framework.common import cardinality  # pylint: disable=unused-import
 from grpc.framework.interfaces.face import face  # pylint: disable=unused-import
 
 
-class Method(object):
+class Method(six.with_metaclass(abc.ABCMeta)):
   """Specifies a method to be used in tests."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def group(self):
@@ -126,9 +127,8 @@ class Method(object):
     raise NotImplementedError()
 
 
-class Implementation(object):
+class Implementation(six.with_metaclass(abc.ABCMeta)):
   """Specifies an implementation of the Face layer."""
-  __metaclass__ = abc.ABCMeta
 
   @abc.abstractmethod
   def instantiate(
diff --git a/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
index dace6c23f3f0b9b50f41caa391f9e4fdf6aded53..2283e79f0abcd06ab3572cb17e15d092c7cf540d 100644
--- a/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
+++ b/src/python/grpcio/tests/unit/framework/interfaces/links/test_cases.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -33,6 +33,8 @@
 import abc
 import unittest  # pylint: disable=unused-import
 
+import six
+
 from grpc.framework.interfaces.links import links
 from tests.unit.framework.common import test_constants
 from tests.unit.framework.interfaces.links import test_utilities
@@ -58,13 +60,12 @@ _TRANSMISSION_GROUP = 'test.Group'
 _TRANSMISSION_METHOD = 'TestMethod'
 
 
-class TransmissionTest(object):
+class TransmissionTest(six.with_metaclass(abc.ABCMeta)):
   """Tests ticket transmission between two connected links.
 
   This class must be mixed into a unittest.TestCase that implements the abstract
   methods it provides.
   """
-  __metaclass__ = abc.ABCMeta
 
   # This is a unittest.TestCase mix-in.
   # pylint: disable=invalid-name
diff --git a/src/python/grpcio/tests/unit/test_common.py b/src/python/grpcio/tests/unit/test_common.py
index 29431bfb9dd282f170b7a1f468887edfa74a8282..824f1cbd160d918e2fa7715b26295bd0427d68ef 100644
--- a/src/python/grpcio/tests/unit/test_common.py
+++ b/src/python/grpcio/tests/unit/test_common.py
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 
 import collections
 
+import six
+
 INVOCATION_INITIAL_METADATA = ((b'0', b'abc'), (b'1', b'def'), (b'2', b'ghi'),)
 SERVICE_INITIAL_METADATA = ((b'3', b'jkl'), (b'4', b'mno'), (b'5', b'pqr'),)
 SERVICE_TERMINAL_METADATA = ((b'6', b'stu'), (b'7', b'vwx'), (b'8', b'yza'),)
@@ -65,7 +67,7 @@ def metadata_transmitted(original_metadata, transmitted_metadata):
     key, value = tuple(key_value_pair)
     transmitted[key].append(value)
 
-  for key, values in original.iteritems():
+  for key, values in six.iteritems(original):
     transmitted_values = transmitted[key]
     transmitted_iterator = iter(transmitted_values)
     try:
diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index af05ddf6e7869f2e69f446345f2b7e91a4716f2c..cd0aa6aaf208e8b9f569849d3a811062c1b29256 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.c
@@ -72,6 +72,10 @@ static ID id_cq;
  * the flags used to create metadata from a Hash */
 static ID id_flags;
 
+/* id_credentials is the name of the hidden ivar that preserves the value
+ * of the credentials added to the call */
+static ID id_credentials;
+
 /* id_input_md is the name of the hidden ivar that preserves the hash used to
  * create metadata, so that references to the strings it contains last as long
  * as the call the metadata is added to. */
@@ -299,6 +303,7 @@ static VALUE grpc_rb_call_set_credentials(VALUE self, VALUE credentials) {
              "grpc_call_set_credentials failed with %s (code=%d)",
              grpc_call_error_detail_of(err), err);
   }
+  rb_ivar_set(self, id_credentials, credentials);
   return Qnil;
 }
 
@@ -859,6 +864,7 @@ void Init_grpc_call() {
   id_cq = rb_intern("__cq");
   id_flags = rb_intern("__flags");
   id_input_md = rb_intern("__input_md");
+  id_credentials = rb_intern("__credentials");
 
   /* Ids used in constructing the batch result. */
   sym_send_message = ID2SYM(rb_intern("send_message"));
diff --git a/src/ruby/ext/grpc/rb_call_credentials.c b/src/ruby/ext/grpc/rb_call_credentials.c
index 2426f106a99e0745058e3fa7b67bf78bed260b47..2b978fcdd0c1266bcbbbe3d4bde1584684ebe52c 100644
--- a/src/ruby/ext/grpc/rb_call_credentials.c
+++ b/src/ruby/ext/grpc/rb_call_credentials.c
@@ -41,6 +41,7 @@
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 #include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 
 #include "rb_call.h"
 #include "rb_event_thread.h"
@@ -50,9 +51,9 @@
  * grpc_call_credentials */
 static VALUE grpc_rb_cCallCredentials = Qnil;
 
-/* grpc_rb_call_credentials wraps a grpc_call_credentials. It provides a peer
- * ruby object, 'mark' to minimize copying when a credential is created from
- * ruby. */
+/* grpc_rb_call_credentials wraps a grpc_call_credentials. It provides a mark
+ * object that is used to hold references to any objects used to create the
+ * credentials. */
 typedef struct grpc_rb_call_credentials {
   /* Holder of ruby objects involved in contructing the credentials */
   VALUE mark;
@@ -81,14 +82,23 @@ static VALUE grpc_rb_call_credentials_callback(VALUE callback_args) {
 static VALUE grpc_rb_call_credentials_callback_rescue(VALUE args,
                                                       VALUE exception_object) {
   VALUE result = rb_hash_new();
+  VALUE backtrace = rb_funcall(
+      rb_funcall(exception_object, rb_intern("backtrace"), 0),
+      rb_intern("join"),
+      1, rb_str_new2("\n\tfrom "));
+  VALUE exception_info = rb_funcall(exception_object, rb_intern("to_s"), 0);
+  const char *exception_classname = rb_obj_classname(exception_object);
   (void)args;
+  gpr_log(GPR_INFO, "Call credentials callback failed: %s: %s\n%s",
+          exception_classname, StringValueCStr(exception_info),
+          StringValueCStr(backtrace));
   rb_hash_aset(result, rb_str_new2("metadata"), Qnil);
   /* Currently only gives the exception class name. It should be possible get
      more details */
   rb_hash_aset(result, rb_str_new2("status"),
                INT2NUM(GRPC_STATUS_PERMISSION_DENIED));
   rb_hash_aset(result, rb_str_new2("details"),
-               rb_str_new2(rb_obj_classname(exception_object)));
+               rb_str_new2(exception_classname));
   return result;
 }
 
@@ -146,13 +156,8 @@ static void grpc_rb_call_credentials_free(void *p) {
     return;
   }
   wrapper = (grpc_rb_call_credentials *)p;
-
-  /* Delete the wrapped object if the mark object is Qnil, which indicates that
-   * no other object is the actual owner. */
-  if (wrapper->wrapped != NULL && wrapper->mark == Qnil) {
-    grpc_call_credentials_release(wrapper->wrapped);
-    wrapper->wrapped = NULL;
-  }
+  grpc_call_credentials_release(wrapper->wrapped);
+  wrapper->wrapped = NULL;
 
   xfree(p);
 }
@@ -164,8 +169,6 @@ static void grpc_rb_call_credentials_mark(void *p) {
     return;
   }
   wrapper = (grpc_rb_call_credentials *)p;
-
-  /* If it's not already cleaned up, mark the mark object */
   if (wrapper->mark != Qnil) {
     rb_gc_mark(wrapper->mark);
   }
@@ -194,7 +197,7 @@ static VALUE grpc_rb_call_credentials_alloc(VALUE cls) {
 /* Creates a wrapping object for a given call credentials. This should only be
  * called with grpc_call_credentials objects that are not already associated
  * with any Ruby object */
-VALUE grpc_rb_wrap_call_credentials(grpc_call_credentials *c) {
+VALUE grpc_rb_wrap_call_credentials(grpc_call_credentials *c, VALUE mark) {
   VALUE rb_wrapper;
   grpc_rb_call_credentials *wrapper;
   if (c == NULL) {
@@ -204,6 +207,7 @@ VALUE grpc_rb_wrap_call_credentials(grpc_call_credentials *c) {
   TypedData_Get_Struct(rb_wrapper, grpc_rb_call_credentials,
                        &grpc_rb_call_credentials_data_type, wrapper);
   wrapper->wrapped = c;
+  wrapper->mark = mark;
   return rb_wrapper;
 }
 
@@ -267,6 +271,7 @@ static VALUE grpc_rb_call_credentials_init(VALUE self, VALUE proc) {
     return Qnil;
   }
 
+  wrapper->mark = proc;
   wrapper->wrapped = creds;
   rb_ivar_set(self, id_callback, proc);
 
@@ -277,15 +282,18 @@ static VALUE grpc_rb_call_credentials_compose(int argc, VALUE *argv,
                                               VALUE self) {
   grpc_call_credentials *creds;
   grpc_call_credentials *other;
+  VALUE mark;
   if (argc == 0) {
     return self;
   }
+  mark = rb_ary_new();
   creds = grpc_rb_get_wrapped_call_credentials(self);
   for (int i = 0; i < argc; i++) {
+    rb_ary_push(mark, argv[i]);
     other = grpc_rb_get_wrapped_call_credentials(argv[i]);
     creds = grpc_composite_call_credentials_create(creds, other, NULL);
   }
-  return grpc_rb_wrap_call_credentials(creds);
+  return grpc_rb_wrap_call_credentials(creds, mark);
 }
 
 void Init_grpc_call_credentials() {
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index 0e6badbdaf09cb88d002f566e3013f862ae284fe..e1aaa539db30b9fe1904b6708530aead2f25325c 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -70,11 +70,10 @@ static VALUE grpc_rb_cChannel = Qnil;
 /* Used during the conversion of a hash to channel args during channel setup */
 static VALUE grpc_rb_cChannelArgs;
 
-/* grpc_rb_channel wraps a grpc_channel.  It provides a peer ruby object,
- * 'mark' to minimize copying when a channel is created from ruby. */
+/* grpc_rb_channel wraps a grpc_channel. */
 typedef struct grpc_rb_channel {
-  /* Holder of ruby objects involved in constructing the channel */
-  VALUE mark;
+  VALUE credentials;
+
   /* The actual channel */
   grpc_channel *wrapped;
 } grpc_rb_channel;
@@ -87,13 +86,8 @@ static void grpc_rb_channel_free(void *p) {
   };
   ch = (grpc_rb_channel *)p;
 
-  /* Deletes the wrapped object if the mark object is Qnil, which indicates
-   * that no other object is the actual owner. */
-  if (ch->wrapped != NULL && ch->mark == Qnil) {
+  if (ch->wrapped != NULL) {
     grpc_channel_destroy(ch->wrapped);
-    rb_warning("channel gc: destroyed the c channel");
-  } else {
-    rb_warning("channel gc: did not destroy the c channel");
   }
 
   xfree(p);
@@ -106,8 +100,8 @@ static void grpc_rb_channel_mark(void *p) {
     return;
   }
   channel = (grpc_rb_channel *)p;
-  if (channel->mark != Qnil) {
-    rb_gc_mark(channel->mark);
+  if (channel->credentials != Qnil) {
+    rb_gc_mark(channel->credentials);
   }
 }
 
@@ -125,7 +119,7 @@ static rb_data_type_t grpc_channel_data_type = {
 static VALUE grpc_rb_channel_alloc(VALUE cls) {
   grpc_rb_channel *wrapper = ALLOC(grpc_rb_channel);
   wrapper->wrapped = NULL;
-  wrapper->mark = Qnil;
+  wrapper->credentials = Qnil;
   return TypedData_Wrap_Struct(cls, &grpc_channel_data_type, wrapper);
 }
 
@@ -162,6 +156,7 @@ static VALUE grpc_rb_channel_init(int argc, VALUE *argv, VALUE self) {
     }
     ch = grpc_insecure_channel_create(target_chars, &args, NULL);
   } else {
+    wrapper->credentials = credentials;
     creds = grpc_rb_get_wrapped_channel_credentials(credentials);
     ch = grpc_secure_channel_create(creds, target_chars, &args, NULL);
   }
@@ -330,7 +325,6 @@ static VALUE grpc_rb_channel_destroy(VALUE self) {
   if (ch != NULL) {
     grpc_channel_destroy(ch);
     wrapper->wrapped = NULL;
-    wrapper->mark = Qnil;
   }
 
   return Qnil;
diff --git a/src/ruby/ext/grpc/rb_channel_credentials.c b/src/ruby/ext/grpc/rb_channel_credentials.c
index 8c6fc3b7eb683f68d62f10dfa21ecaa65c44a928..f6490843113feb953d630b6989c490c19da74434 100644
--- a/src/ruby/ext/grpc/rb_channel_credentials.c
+++ b/src/ruby/ext/grpc/rb_channel_credentials.c
@@ -49,8 +49,8 @@
 static VALUE grpc_rb_cChannelCredentials = Qnil;
 
 /* grpc_rb_channel_credentials wraps a grpc_channel_credentials.  It provides a
- * peer ruby object, 'mark' to minimize copying when a credential is
- * created from ruby. */
+ * mark object that is used to hold references to any objects used to create
+ * the credentials. */
 typedef struct grpc_rb_channel_credentials {
   /* Holder of ruby objects involved in constructing the credentials */
   VALUE mark;
@@ -66,13 +66,8 @@ static void grpc_rb_channel_credentials_free(void *p) {
     return;
   };
   wrapper = (grpc_rb_channel_credentials *)p;
-
-  /* Delete the wrapped object if the mark object is Qnil, which indicates that
-   * no other object is the actual owner. */
-  if (wrapper->wrapped != NULL && wrapper->mark == Qnil) {
-    grpc_channel_credentials_release(wrapper->wrapped);
-    wrapper->wrapped = NULL;
-  }
+  grpc_channel_credentials_release(wrapper->wrapped);
+  wrapper->wrapped = NULL;
 
   xfree(p);
 }
@@ -85,7 +80,6 @@ static void grpc_rb_channel_credentials_mark(void *p) {
   }
   wrapper = (grpc_rb_channel_credentials *)p;
 
-  /* If it's not already cleaned up, mark the mark object */
   if (wrapper->mark != Qnil) {
     rb_gc_mark(wrapper->mark);
   }
@@ -114,7 +108,7 @@ static VALUE grpc_rb_channel_credentials_alloc(VALUE cls) {
 /* Creates a wrapping object for a given channel credentials. This should only
  * be called with grpc_channel_credentials objects that are not already
  * associated with any Ruby object. */
-VALUE grpc_rb_wrap_channel_credentials(grpc_channel_credentials *c) {
+VALUE grpc_rb_wrap_channel_credentials(grpc_channel_credentials *c, VALUE mark) {
   VALUE rb_wrapper;
   grpc_rb_channel_credentials *wrapper;
   if (c == NULL) {
@@ -124,6 +118,7 @@ VALUE grpc_rb_wrap_channel_credentials(grpc_channel_credentials *c) {
   TypedData_Get_Struct(rb_wrapper, grpc_rb_channel_credentials,
                        &grpc_rb_channel_credentials_data_type, wrapper);
   wrapper->wrapped = c;
+  wrapper->mark = mark;
   return rb_wrapper;
 }
 
@@ -222,11 +217,15 @@ static VALUE grpc_rb_channel_credentials_compose(int argc, VALUE *argv,
                                                  VALUE self) {
   grpc_channel_credentials *creds;
   grpc_call_credentials *other;
+  VALUE mark;
   if (argc == 0) {
     return self;
   }
+  mark = rb_ary_new();
+  rb_ary_push(mark, self);
   creds = grpc_rb_get_wrapped_channel_credentials(self);
   for (int i = 0; i < argc; i++) {
+    rb_ary_push(mark, argv[i]);
     other = grpc_rb_get_wrapped_call_credentials(argv[i]);
     creds = grpc_composite_channel_credentials_create(creds, other, NULL);
     if (creds == NULL) {
@@ -234,7 +233,7 @@ static VALUE grpc_rb_channel_credentials_compose(int argc, VALUE *argv,
                "Failed to compose channel and call credentials");
     }
   }
-  return grpc_rb_wrap_channel_credentials(creds);
+  return grpc_rb_wrap_channel_credentials(creds, mark);
 }
 
 void Init_grpc_channel_credentials() {
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index b972f60fc3584dbed102d5b306f451b9ac14634a..3bf81af8fbcc0d927bc7bd7b3b13acbe290d9bf8 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -166,7 +166,7 @@ extern grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_im
 typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, char **name);
 extern grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
 #define grpc_compression_algorithm_name grpc_compression_algorithm_name_import
-typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level);
+typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level, uint32_t accepted_encodings);
 extern grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
 #define grpc_compression_algorithm_for_level grpc_compression_algorithm_for_level_import
 typedef void(*grpc_compression_options_init_type)(grpc_compression_options *opts);
diff --git a/summerofcode/ideas.md b/summerofcode/ideas.md
index 83f2cecd48c508348ad5a691daf9e4d6a8f09f9b..d87cf1b8fa3d3cb88fa934de3849a54f63400bab 100644
--- a/summerofcode/ideas.md
+++ b/summerofcode/ideas.md
@@ -36,7 +36,7 @@ gRPC Python:
  * **Required skills:** Python programming language, PyPy Python interpreter.
  * **Likely mentors:** [Nathaniel Manista](https://github.com/nathanielmanistaatgoogle), [Masood Malekghassemi](https://github.com/soltanmm).
 1. Develop and test Python 3.5 Support for gRPC. Make necessary changes to port gRPC and package it for supported platforms.
- * **Required skills:** Python programming language, PyPy Python interpreter.
+ * **Required skills:** Python programming language, Python 3.5 interpreter.
  * **Likely mentors:** [Nathaniel Manista](https://github.com/nathanielmanistaatgoogle), [Masood Malekghassemi](https://github.com/soltanmm).
  
 gRPC Ruby/Java:
diff --git a/templates/tools/dockerfile/apt_get_basic.include b/templates/tools/dockerfile/apt_get_basic.include
index 547ce01a300902e06717f09be302a23e86f82cfd..9237e7dacef6bf786c53de2650e1a753c11b2584 100644
--- a/templates/tools/dockerfile/apt_get_basic.include
+++ b/templates/tools/dockerfile/apt_get_basic.include
@@ -1,4 +1,3 @@
-<%page args="skip_golang=False"/>\
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y ${'\\'}
   autoconf ${'\\'}
@@ -10,9 +9,7 @@ RUN apt-get update && apt-get install -y ${'\\'}
   gcc ${'\\'}
   gcc-multilib ${'\\'}
   git ${'\\'}
-% if not skip_golang:
   golang ${'\\'}
-% endif
   gyp ${'\\'}
   lcov ${'\\'}
   libc6 ${'\\'}
diff --git a/templates/tools/dockerfile/clang_update.include b/templates/tools/dockerfile/clang_update.include
new file mode 100644
index 0000000000000000000000000000000000000000..83ab3e0bbbf01f78a3515b260db91c1a48a3bcdf
--- /dev/null
+++ b/templates/tools/dockerfile/clang_update.include
@@ -0,0 +1,32 @@
+#=================
+# Update clang to a version with improved tsan
+
+RUN apt-get update && apt-get -y install python cmake && apt-get clean
+
+RUN git clone -n -b release_38 http://llvm.org/git/llvm.git && ${'\\'}
+  cd llvm && git checkout ad57503 && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/clang.git && ${'\\'}
+  cd clang && git checkout ad2c56e && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/compiler-rt.git && ${'\\'}
+  cd compiler-rt && git checkout 3176922 && cd ..
+RUN git clone -n -b release_38 ${'\\'}
+  http://llvm.org/git/clang-tools-extra.git && cd clang-tools-extra && ${'\\'}
+  git checkout c288525 && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/libcxx.git && ${'\\'}
+  cd libcxx && git checkout fda3549  && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/libcxxabi.git && ${'\\'}
+  cd libcxxabi && git checkout 8d4e51d && cd ..
+
+RUN mv clang llvm/tools
+RUN mv compiler-rt llvm/projects
+RUN mv clang-tools-extra llvm/tools/clang/tools
+RUN mv libcxx llvm/projects
+RUN mv libcxxabi llvm/projects
+
+RUN mkdir llvm-build
+RUN cd llvm-build && cmake ${'\\'}
+  -DCMAKE_BUILD_TYPE:STRING=Release ${'\\'}
+  -DCMAKE_INSTALL_PREFIX:STRING=/usr ${'\\'}
+  -DLLVM_TARGETS_TO_BUILD:STRING=X86 ${'\\'}
+  ../llvm
+RUN make -C llvm-build && make -C llvm-build install && rm -rf llvm-build
diff --git a/templates/tools/dockerfile/run_tests_addons.include b/templates/tools/dockerfile/run_tests_addons.include
index 30d22be2980462f8f281f9ce011eae0223da0c28..27ac67f5d8feeec3023090c99d06dd7c5870c5a7 100644
--- a/templates/tools/dockerfile/run_tests_addons.include
+++ b/templates/tools/dockerfile/run_tests_addons.include
@@ -1,10 +1,7 @@
-<%page args="skip_zookeeper=False"/>\
 <%include file="ccache_setup.include"/>
-% if not skip_zookeeper:
 #======================
 # Zookeeper dependencies
 # TODO(jtattermusch): is zookeeper still needed?
 RUN apt-get install -y libzookeeper-mt-dev
-% endif
 
 RUN mkdir /var/local/jenkins
diff --git a/templates/tools/dockerfile/test/cxx_jessie_x64/Dockerfile.template b/templates/tools/dockerfile/test/cxx_jessie_x64/Dockerfile.template
index 842c534805059af06a760b130b8fd2c42400e2db..eb11ce352c82984986312550aae432d998d84c08 100644
--- a/templates/tools/dockerfile/test/cxx_jessie_x64/Dockerfile.template
+++ b/templates/tools/dockerfile/test/cxx_jessie_x64/Dockerfile.template
@@ -33,7 +33,7 @@
   
   <%include file="../../apt_get_basic.include"/>
   <%include file="../../cxx_deps.include"/>
+  <%include file="../../clang_update.include"/>
   <%include file="../../run_tests_addons.include"/>
   # Define the default command.
   CMD ["bash"]
-  
\ No newline at end of file
diff --git a/templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template b/templates/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile.template
similarity index 78%
rename from templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template
rename to templates/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile.template
index 49371aaa3bbc6abbff53f510528304e81c2e22e2..79567987817dd6a33bd8811d568ec19992312d48 100644
--- a/templates/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile.template
+++ b/templates/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile.template
@@ -29,20 +29,19 @@
   # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-  FROM debian:squeeze
+  FROM debian:wheezy
 
-  <%include file="../../apt_get_basic.include" args="skip_golang=True"/>
+  <%include file="../../apt_get_basic.include"/>
+  <%include file="../../cxx_deps.include"/>
 
-  # libgflags-dev is not available on squeezy
-  RUN apt-get update && apt-get -y install libgtest-dev libc++-dev clang && apt-get clean
-
-  RUN apt-get update && apt-get -y install python-pip && apt-get clean
-  RUN pip install argparse
+  RUN apt-get update && apt-get install -y ${'\\'}
+    gcc-4.4 ${'\\'}
+    gcc-4.4-multilib
 
   RUN wget ${openssl_fallback.base_uri + openssl_fallback.tarball}
 
-  ENV POST_GIT_STEP tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh
+  ENV POST_GIT_STEP tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh
 
-  <%include file="../../run_tests_addons.include" args="skip_zookeeper=True"/>
+  <%include file="../../run_tests_addons.include"/>
   # Define the default command.
   CMD ["bash"]
diff --git a/templates/tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh.template b/templates/tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh.template
similarity index 100%
rename from templates/tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh.template
rename to templates/tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh.template
diff --git a/templates/tools/dockerfile/test/sanity/Dockerfile.template b/templates/tools/dockerfile/test/sanity/Dockerfile.template
index ad1d92e7cbd4fa6af5b9495a73abcc7fc4032162..8265c09afc096821334d60141fdb0b5986d9d483 100644
--- a/templates/tools/dockerfile/test/sanity/Dockerfile.template
+++ b/templates/tools/dockerfile/test/sanity/Dockerfile.template
@@ -34,7 +34,13 @@
   <%include file="../../apt_get_basic.include"/>
   #========================
   # Sanity test dependencies
-  RUN apt-get update && apt-get install -y python-pip
+  RUN apt-get update && apt-get install -y ${"\\"}
+        python-pip ${"\\"}
+        autoconf ${"\\"}
+        automake ${"\\"}
+        libtool ${"\\"}
+        curl ${"\\"}
+        python-virtualenv
   RUN pip install simplejson mako
 
   #===================
diff --git a/test/core/bad_client/bad_client.c b/test/core/bad_client/bad_client.c
index 1a2ca6f0c097879b550cd2e771e03148e4fe9fb9..ba1901301c79200aed06f87db7362c20179ff84a 100644
--- a/test/core/bad_client/bad_client.c
+++ b/test/core/bad_client/bad_client.c
@@ -67,11 +67,8 @@ static void done_write(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
   thd_args *a = ts;
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_http_server_filter};
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, a->server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters),
+  grpc_server_setup_transport(&exec_ctx, a->server, transport,
                               grpc_server_get_channel_args(a->server));
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -105,7 +102,7 @@ void grpc_run_bad_client_test(grpc_bad_client_server_side_validator validator,
   sfd = grpc_iomgr_create_endpoint_pair("fixture", 65536);
 
   /* Create server, completion events */
-  a.server = grpc_server_create_from_filters(NULL, 0, NULL);
+  a.server = grpc_server_create(NULL, NULL);
   a.cq = grpc_completion_queue_create(NULL);
   gpr_event_init(&a.done_thd);
   gpr_event_init(&a.done_write);
diff --git a/test/core/client_config/lb_policies_test.c b/test/core/client_config/lb_policies_test.c
index cb99b3da3e767efdf72d63278e11e1fcbd0eabcd..1ea0c423c189a5500261c673f61e98f052782dec 100644
--- a/test/core/client_config/lb_policies_test.c
+++ b/test/core/client_config/lb_policies_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,6 +52,8 @@
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 
+#define RETRY_TIMEOUT 300
+
 typedef struct servers_fixture {
   size_t num_servers;
   grpc_server **servers;
@@ -303,8 +305,8 @@ static int *perform_request(servers_fixture *f, grpc_channel *client,
 
     s_idx = -1;
     while ((ev = grpc_completion_queue_next(
-                f->cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), NULL)).type !=
-           GRPC_QUEUE_TIMEOUT) {
+                f->cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10 * RETRY_TIMEOUT),
+                NULL)).type != GRPC_QUEUE_TIMEOUT) {
       GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
       read_tag = ((int)(intptr_t)ev.tag);
       gpr_log(GPR_DEBUG, "EVENT: success:%d, type:%d, tag:%d iter:%d",
@@ -376,9 +378,9 @@ static int *perform_request(servers_fixture *f, grpc_channel *client,
       }
     }
 
-    GPR_ASSERT(grpc_completion_queue_next(f->cq,
-                                          GRPC_TIMEOUT_MILLIS_TO_DEADLINE(200),
-                                          NULL).type == GRPC_QUEUE_TIMEOUT);
+    GPR_ASSERT(grpc_completion_queue_next(
+                   f->cq, GRPC_TIMEOUT_MILLIS_TO_DEADLINE(2 * RETRY_TIMEOUT),
+                   NULL).type == GRPC_QUEUE_TIMEOUT);
 
     grpc_metadata_array_destroy(&rdata->initial_metadata_recv);
     grpc_metadata_array_destroy(&rdata->trailing_metadata_recv);
@@ -506,7 +508,7 @@ void run_spec(const test_spec *spec) {
 
   arg.type = GRPC_ARG_INTEGER;
   arg.key = "grpc.testing.fixed_reconnect_backoff";
-  arg.value.integer = 100;
+  arg.value.integer = RETRY_TIMEOUT;
   args.num_args = 1;
   args.args = &arg;
 
@@ -542,7 +544,7 @@ static grpc_channel *create_client(const servers_fixture *f) {
 
   arg.type = GRPC_ARG_INTEGER;
   arg.key = "grpc.testing.fixed_reconnect_backoff";
-  arg.value.integer = 100;
+  arg.value.integer = RETRY_TIMEOUT;
   args.num_args = 1;
   args.args = &arg;
 
diff --git a/test/core/compression/compression_test.c b/test/core/compression/compression_test.c
index 26d7b2b6ccd3cfbfca6971bd25b7e4285b113f89..5d8231fd7fe80903a6c96b1fb029e243ba25f39a 100644
--- a/test/core/compression/compression_test.c
+++ b/test/core/compression/compression_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -93,18 +93,98 @@ static void test_compression_algorithm_name(void) {
 }
 
 static void test_compression_algorithm_for_level(void) {
-  size_t i;
-  grpc_compression_level levels[] = {
-      GRPC_COMPRESS_LEVEL_NONE, GRPC_COMPRESS_LEVEL_LOW,
-      GRPC_COMPRESS_LEVEL_MED, GRPC_COMPRESS_LEVEL_HIGH};
-  grpc_compression_algorithm algorithms[] = {
-      GRPC_COMPRESS_NONE, GRPC_COMPRESS_DEFLATE, GRPC_COMPRESS_DEFLATE,
-      GRPC_COMPRESS_DEFLATE};
   gpr_log(GPR_DEBUG, "test_compression_algorithm_for_level");
 
-  for (i = 0; i < GPR_ARRAY_SIZE(levels); i++) {
-    GPR_ASSERT(algorithms[i] ==
-               grpc_compression_algorithm_for_level(levels[i]));
+  {
+    /* accept only identity (aka none) */
+    uint32_t accepted_encodings = 0;
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_NONE); /* always */
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_NONE,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_LOW,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_MED,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_HIGH,
+                                                    accepted_encodings));
+  }
+
+  {
+    /* accept only gzip */
+    uint32_t accepted_encodings = 0;
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_NONE); /* always */
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_GZIP);
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_NONE,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_GZIP ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_LOW,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_GZIP ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_MED,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_GZIP ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_HIGH,
+                                                    accepted_encodings));
+  }
+
+  {
+    /* accept only deflate */
+    uint32_t accepted_encodings = 0;
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_NONE); /* always */
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_DEFLATE);
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_NONE,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_DEFLATE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_LOW,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_DEFLATE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_MED,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_DEFLATE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_HIGH,
+                                                    accepted_encodings));
+  }
+
+  {
+    /* accept gzip and deflate */
+    uint32_t accepted_encodings = 0;
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_NONE); /* always */
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_GZIP);
+    GPR_BITSET(&accepted_encodings, GRPC_COMPRESS_DEFLATE);
+
+    GPR_ASSERT(GRPC_COMPRESS_NONE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_NONE,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_GZIP ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_LOW,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_DEFLATE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_MED,
+                                                    accepted_encodings));
+
+    GPR_ASSERT(GRPC_COMPRESS_DEFLATE ==
+               grpc_compression_algorithm_for_level(GRPC_COMPRESS_LEVEL_HIGH,
+                                                    accepted_encodings));
   }
 }
 
diff --git a/test/core/end2end/fixtures/h2_full+trace.c b/test/core/end2end/fixtures/h2_full+trace.c
new file mode 100644
index 0000000000000000000000000000000000000000..042ee212d752b32efe9512e46ae773d555ed7260
--- /dev/null
+++ b/test/core/end2end/fixtures/h2_full+trace.c
@@ -0,0 +1,132 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/core/end2end/end2end_tests.h"
+
+#include <string.h>
+
+#include "src/core/channel/client_channel.h"
+#include "src/core/channel/connected_channel.h"
+#include "src/core/channel/http_server_filter.h"
+#include "src/core/surface/channel.h"
+#include "src/core/surface/server.h"
+#include "src/core/transport/chttp2_transport.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+#include "src/core/support/env.h"
+
+typedef struct fullstack_fixture_data {
+  char *localaddr;
+} fullstack_fixture_data;
+
+static grpc_end2end_test_fixture chttp2_create_fixture_fullstack(
+    grpc_channel_args *client_args, grpc_channel_args *server_args) {
+  grpc_end2end_test_fixture f;
+  int port = grpc_pick_unused_port_or_die();
+  fullstack_fixture_data *ffd = gpr_malloc(sizeof(fullstack_fixture_data));
+  memset(&f, 0, sizeof(f));
+
+  gpr_join_host_port(&ffd->localaddr, "localhost", port);
+
+  f.fixture_data = ffd;
+  f.cq = grpc_completion_queue_create(NULL);
+
+  return f;
+}
+
+void chttp2_init_client_fullstack(grpc_end2end_test_fixture *f,
+                                  grpc_channel_args *client_args) {
+  fullstack_fixture_data *ffd = f->fixture_data;
+  f->client = grpc_insecure_channel_create(ffd->localaddr, client_args, NULL);
+  GPR_ASSERT(f->client);
+}
+
+void chttp2_init_server_fullstack(grpc_end2end_test_fixture *f,
+                                  grpc_channel_args *server_args) {
+  fullstack_fixture_data *ffd = f->fixture_data;
+  if (f->server) {
+    grpc_server_destroy(f->server);
+  }
+  f->server = grpc_server_create(server_args, NULL);
+  grpc_server_register_completion_queue(f->server, f->cq, NULL);
+  GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
+  grpc_server_start(f->server);
+}
+
+void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
+  fullstack_fixture_data *ffd = f->fixture_data;
+  gpr_free(ffd->localaddr);
+  gpr_free(ffd);
+}
+
+/* All test configurations */
+static grpc_end2end_test_config configs[] = {
+    {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION,
+     chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
+     chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
+};
+
+int main(int argc, char **argv) {
+  size_t i;
+
+  /* force tracing on, with a value to force many
+     code paths in trace.c to be taken */
+  gpr_setenv("GRPC_TRACE", "doesnt-exist,http,all");
+
+#ifdef GPR_POSIX_SOCKET
+  g_fixture_slowdown_factor = isatty(STDOUT_FILENO) ? 10.0 : 1.0;
+#else
+  g_fixture_slowdown_factor = 10.0;
+#endif
+
+  grpc_test_init(argc, argv);
+  grpc_init();
+
+  GPR_ASSERT(0 == grpc_tracer_set_enabled("also-doesnt-exist", 0));
+  GPR_ASSERT(1 == grpc_tracer_set_enabled("http", 1));
+  GPR_ASSERT(1 == grpc_tracer_set_enabled("all", 1));
+
+  for (i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
+    grpc_end2end_tests(argc, argv, configs[i]);
+  }
+
+  grpc_shutdown();
+
+  return 0;
+}
diff --git a/test/core/end2end/fixtures/h2_sockpair+trace.c b/test/core/end2end/fixtures/h2_sockpair+trace.c
index 511c8b1a46a4753c747cf54d84854c4301426e08..482aa8dba8e57de69b6a0ca150e69dcadd2d4724 100644
--- a/test/core/end2end/fixtures/h2_sockpair+trace.c
+++ b/test/core/end2end/fixtures/h2_sockpair+trace.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,11 +59,8 @@
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
   grpc_end2end_test_fixture *f = ts;
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_http_server_filter};
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters),
+  grpc_server_setup_transport(&exec_ctx, f->server, transport,
                               grpc_server_get_channel_args(f->server));
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -77,17 +74,9 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
   sp_client_setup *cs = ts;
 
-  const grpc_channel_filter *filters[] = {&grpc_http_client_filter,
-                                          &grpc_compress_filter,
-                                          &grpc_connected_channel_filter};
-  size_t nfilters = sizeof(filters) / sizeof(*filters);
-  grpc_channel *channel = grpc_channel_create_from_filters(
-      exec_ctx, "socketpair-target", filters, nfilters, cs->client_args, 1);
-
-  cs->f->client = channel;
-
-  grpc_connected_channel_bind_transport(grpc_channel_get_channel_stack(channel),
-                                        transport);
+  cs->f->client =
+      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
+                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -126,7 +115,7 @@ static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
   grpc_endpoint_pair *sfd = f->fixture_data;
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
-  f->server = grpc_server_create_from_filters(NULL, 0, server_args);
+  f->server = grpc_server_create(server_args, NULL);
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
   grpc_server_start(f->server);
   transport =
diff --git a/test/core/end2end/fixtures/h2_sockpair.c b/test/core/end2end/fixtures/h2_sockpair.c
index 6b4787b1e52bf973d110c0f730fad2561c0181c6..cf1c4ac2ae99acfe202c7fdba4c87b0e21fad6f1 100644
--- a/test/core/end2end/fixtures/h2_sockpair.c
+++ b/test/core/end2end/fixtures/h2_sockpair.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,11 +58,8 @@
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
   grpc_end2end_test_fixture *f = ts;
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_http_server_filter};
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters),
+  grpc_server_setup_transport(&exec_ctx, f->server, transport,
                               grpc_server_get_channel_args(f->server));
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -76,17 +73,9 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
   sp_client_setup *cs = ts;
 
-  const grpc_channel_filter *filters[] = {&grpc_http_client_filter,
-                                          &grpc_compress_filter,
-                                          &grpc_connected_channel_filter};
-  size_t nfilters = sizeof(filters) / sizeof(*filters);
-  grpc_channel *channel = grpc_channel_create_from_filters(
-      exec_ctx, "socketpair-target", filters, nfilters, cs->client_args, 1);
-
-  cs->f->client = channel;
-
-  grpc_connected_channel_bind_transport(grpc_channel_get_channel_stack(channel),
-                                        transport);
+  cs->f->client =
+      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
+                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -125,7 +114,7 @@ static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
   grpc_endpoint_pair *sfd = f->fixture_data;
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
-  f->server = grpc_server_create_from_filters(NULL, 0, server_args);
+  f->server = grpc_server_create(server_args, NULL);
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
   grpc_server_start(f->server);
   transport =
diff --git a/test/core/end2end/fixtures/h2_sockpair_1byte.c b/test/core/end2end/fixtures/h2_sockpair_1byte.c
index 3ae8e9668327d0dc00b7b4ca6df878e549769708..f49938c6191d76b8b82271a8c3e21c837fa78952 100644
--- a/test/core/end2end/fixtures/h2_sockpair_1byte.c
+++ b/test/core/end2end/fixtures/h2_sockpair_1byte.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -58,11 +58,8 @@
 
 static void server_setup_transport(void *ts, grpc_transport *transport) {
   grpc_end2end_test_fixture *f = ts;
-  static grpc_channel_filter const *extra_filters[] = {
-      &grpc_http_server_filter};
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_server_setup_transport(&exec_ctx, f->server, transport, extra_filters,
-                              GPR_ARRAY_SIZE(extra_filters),
+  grpc_server_setup_transport(&exec_ctx, f->server, transport,
                               grpc_server_get_channel_args(f->server));
   grpc_exec_ctx_finish(&exec_ctx);
 }
@@ -76,17 +73,9 @@ static void client_setup_transport(grpc_exec_ctx *exec_ctx, void *ts,
                                    grpc_transport *transport) {
   sp_client_setup *cs = ts;
 
-  const grpc_channel_filter *filters[] = {&grpc_http_client_filter,
-                                          &grpc_compress_filter,
-                                          &grpc_connected_channel_filter};
-  size_t nfilters = sizeof(filters) / sizeof(*filters);
-  grpc_channel *channel = grpc_channel_create_from_filters(
-      exec_ctx, "socketpair-target", filters, nfilters, cs->client_args, 1);
-
-  cs->f->client = channel;
-
-  grpc_connected_channel_bind_transport(grpc_channel_get_channel_stack(channel),
-                                        transport);
+  cs->f->client =
+      grpc_channel_create(exec_ctx, "socketpair-target", cs->client_args,
+                          GRPC_CLIENT_DIRECT_CHANNEL, transport);
 }
 
 static grpc_end2end_test_fixture chttp2_create_fixture_socketpair(
@@ -125,7 +114,7 @@ static void chttp2_init_server_socketpair(grpc_end2end_test_fixture *f,
   grpc_endpoint_pair *sfd = f->fixture_data;
   grpc_transport *transport;
   GPR_ASSERT(!f->server);
-  f->server = grpc_server_create_from_filters(NULL, 0, server_args);
+  f->server = grpc_server_create(server_args, NULL);
   grpc_server_register_completion_queue(f->server, f->cq, NULL);
   grpc_server_start(f->server);
   transport =
diff --git a/test/core/end2end/fixtures/h2_uchannel.c b/test/core/end2end/fixtures/h2_uchannel.c
deleted file mode 100644
index 87bbd64d09a937b66ab8637647e4b1445a2f16a8..0000000000000000000000000000000000000000
--- a/test/core/end2end/fixtures/h2_uchannel.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include "test/core/end2end/end2end_tests.h"
-
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-#include <grpc/support/sync.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/useful.h>
-#include "src/core/channel/channel_args.h"
-#include "src/core/channel/client_channel.h"
-#include "src/core/channel/client_uchannel.h"
-#include "src/core/channel/connected_channel.h"
-#include "src/core/channel/http_client_filter.h"
-#include "src/core/channel/http_server_filter.h"
-#include "src/core/client_config/resolver_registry.h"
-#include "src/core/iomgr/tcp_client.h"
-#include "src/core/surface/channel.h"
-#include "src/core/surface/server.h"
-#include "src/core/transport/chttp2_transport.h"
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
-
-typedef struct {
-  grpc_connector base;
-  gpr_refcount refs;
-
-  grpc_closure *notify;
-  grpc_connect_in_args args;
-  grpc_connect_out_args *result;
-
-  grpc_endpoint *tcp;
-
-  grpc_closure connected;
-} connector;
-
-static void connector_ref(grpc_connector *con) {
-  connector *c = (connector *)con;
-  gpr_ref(&c->refs);
-}
-
-static void connector_unref(grpc_exec_ctx *exec_ctx, grpc_connector *con) {
-  connector *c = (connector *)con;
-  if (gpr_unref(&c->refs)) {
-    gpr_free(c);
-  }
-}
-
-static void connected(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
-  connector *c = arg;
-  grpc_closure *notify;
-  grpc_endpoint *tcp = c->tcp;
-  if (tcp != NULL) {
-    c->result->transport =
-        grpc_create_chttp2_transport(exec_ctx, c->args.channel_args, tcp, 1);
-    grpc_chttp2_transport_start_reading(exec_ctx, c->result->transport, NULL,
-                                        0);
-    GPR_ASSERT(c->result->transport);
-    c->result->filters = gpr_malloc(sizeof(grpc_channel_filter *));
-    c->result->filters[0] = &grpc_http_client_filter;
-    c->result->num_filters = 1;
-  } else {
-    memset(c->result, 0, sizeof(*c->result));
-  }
-  notify = c->notify;
-  c->notify = NULL;
-  notify->cb(exec_ctx, notify->cb_arg, 1);
-}
-
-static void connector_shutdown(grpc_exec_ctx *exec_ctx, grpc_connector *con) {}
-
-static void connector_connect(grpc_exec_ctx *exec_ctx, grpc_connector *con,
-                              const grpc_connect_in_args *args,
-                              grpc_connect_out_args *result,
-                              grpc_closure *notify) {
-  connector *c = (connector *)con;
-  GPR_ASSERT(c->notify == NULL);
-  GPR_ASSERT(notify->cb);
-  c->notify = notify;
-  c->args = *args;
-  c->result = result;
-  c->tcp = NULL;
-  grpc_closure_init(&c->connected, connected, c);
-  grpc_tcp_client_connect(exec_ctx, &c->connected, &c->tcp,
-                          args->interested_parties, args->addr, args->addr_len,
-                          args->deadline);
-}
-
-static const grpc_connector_vtable connector_vtable = {
-    connector_ref, connector_unref, connector_shutdown, connector_connect};
-
-typedef struct {
-  grpc_subchannel_factory base;
-  gpr_refcount refs;
-  grpc_channel_args *merge_args;
-  grpc_channel *master;
-  grpc_subchannel **sniffed_subchannel;
-} subchannel_factory;
-
-static void subchannel_factory_ref(grpc_subchannel_factory *scf) {
-  subchannel_factory *f = (subchannel_factory *)scf;
-  gpr_ref(&f->refs);
-}
-
-static void subchannel_factory_unref(grpc_exec_ctx *exec_ctx,
-                                     grpc_subchannel_factory *scf) {
-  subchannel_factory *f = (subchannel_factory *)scf;
-  if (gpr_unref(&f->refs)) {
-    GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, f->master, "subchannel_factory");
-    grpc_channel_args_destroy(f->merge_args);
-    gpr_free(f);
-  }
-}
-
-static grpc_subchannel *subchannel_factory_create_subchannel(
-    grpc_exec_ctx *exec_ctx, grpc_subchannel_factory *scf,
-    grpc_subchannel_args *args) {
-  subchannel_factory *f = (subchannel_factory *)scf;
-  connector *c = gpr_malloc(sizeof(*c));
-  grpc_channel_args *final_args =
-      grpc_channel_args_merge(args->args, f->merge_args);
-  grpc_subchannel *s;
-  memset(c, 0, sizeof(*c));
-  c->base.vtable = &connector_vtable;
-  gpr_ref_init(&c->refs, 1);
-  args->args = final_args;
-  s = grpc_subchannel_create(exec_ctx, &c->base, args);
-  grpc_connector_unref(exec_ctx, &c->base);
-  grpc_channel_args_destroy(final_args);
-  if (*f->sniffed_subchannel) {
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, *f->sniffed_subchannel, "sniffed");
-  }
-  *f->sniffed_subchannel = s;
-  GRPC_SUBCHANNEL_REF(s, "sniffed");
-  return s;
-}
-
-static const grpc_subchannel_factory_vtable test_subchannel_factory_vtable = {
-    subchannel_factory_ref, subchannel_factory_unref,
-    subchannel_factory_create_subchannel};
-
-/* The evil twin of grpc_insecure_channel_create. It allows the test to use the
- * custom-built sniffing subchannel_factory */
-grpc_channel *channel_create(const char *target, const grpc_channel_args *args,
-                             grpc_subchannel **sniffed_subchannel) {
-  grpc_channel *channel = NULL;
-#define MAX_FILTERS 1
-  const grpc_channel_filter *filters[MAX_FILTERS];
-  grpc_resolver *resolver;
-  subchannel_factory *f;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  size_t n = 0;
-
-  filters[n++] = &grpc_client_channel_filter;
-  GPR_ASSERT(n <= MAX_FILTERS);
-
-  channel =
-      grpc_channel_create_from_filters(&exec_ctx, target, filters, n, args, 1);
-
-  f = gpr_malloc(sizeof(*f));
-  f->sniffed_subchannel = sniffed_subchannel;
-  f->base.vtable = &test_subchannel_factory_vtable;
-  gpr_ref_init(&f->refs, 1);
-  f->merge_args = grpc_channel_args_copy(args);
-  f->master = channel;
-  GRPC_CHANNEL_INTERNAL_REF(f->master, "test_subchannel_factory");
-  resolver = grpc_resolver_create(target, &f->base);
-  if (!resolver) {
-    return NULL;
-  }
-
-  grpc_client_channel_set_resolver(
-      &exec_ctx, grpc_channel_get_channel_stack(channel), resolver);
-  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test_create");
-  grpc_subchannel_factory_unref(&exec_ctx, &f->base);
-
-  grpc_exec_ctx_finish(&exec_ctx);
-
-  return channel;
-}
-
-typedef struct micro_fullstack_fixture_data {
-  char *localaddr;
-  grpc_channel *master_channel;
-  grpc_subchannel *sniffed_subchannel;
-} micro_fullstack_fixture_data;
-
-static grpc_end2end_test_fixture chttp2_create_fixture_micro_fullstack(
-    grpc_channel_args *client_args, grpc_channel_args *server_args) {
-  grpc_end2end_test_fixture f;
-  int port = grpc_pick_unused_port_or_die();
-  micro_fullstack_fixture_data *ffd =
-      gpr_malloc(sizeof(micro_fullstack_fixture_data));
-  memset(&f, 0, sizeof(f));
-  memset(ffd, 0, sizeof(*ffd));
-
-  gpr_join_host_port(&ffd->localaddr, "127.0.0.1", port);
-
-  f.fixture_data = ffd;
-  f.cq = grpc_completion_queue_create(NULL);
-
-  return f;
-}
-
-grpc_connectivity_state g_state = GRPC_CHANNEL_IDLE;
-grpc_pollset_set *g_interested_parties;
-
-static void state_changed(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
-  if (g_state != GRPC_CHANNEL_READY) {
-    grpc_subchannel_notify_on_state_change(
-        exec_ctx, arg, g_interested_parties, &g_state,
-        grpc_closure_create(state_changed, arg));
-  }
-}
-
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
-  grpc_pollset_destroy(arg);
-}
-
-static grpc_connected_subchannel *connect_subchannel(grpc_subchannel *c) {
-  gpr_mu *mu;
-  grpc_pollset *pollset = gpr_malloc(grpc_pollset_size());
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_pollset_init(pollset, &mu);
-  g_interested_parties = grpc_pollset_set_create();
-  grpc_pollset_set_add_pollset(&exec_ctx, g_interested_parties, pollset);
-  grpc_subchannel_notify_on_state_change(&exec_ctx, c, g_interested_parties,
-                                         &g_state,
-                                         grpc_closure_create(state_changed, c));
-  grpc_exec_ctx_flush(&exec_ctx);
-  gpr_mu_lock(mu);
-  while (g_state != GRPC_CHANNEL_READY) {
-    grpc_pollset_worker *worker = NULL;
-    grpc_pollset_work(&exec_ctx, pollset, &worker, gpr_now(GPR_CLOCK_MONOTONIC),
-                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
-    gpr_mu_unlock(mu);
-    grpc_exec_ctx_flush(&exec_ctx);
-    gpr_mu_lock(mu);
-  }
-  grpc_pollset_shutdown(&exec_ctx, pollset,
-                        grpc_closure_create(destroy_pollset, pollset));
-  grpc_pollset_set_destroy(g_interested_parties);
-  gpr_mu_unlock(mu);
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(pollset);
-  return grpc_subchannel_get_connected_subchannel(c);
-}
-
-static void chttp2_init_client_micro_fullstack(grpc_end2end_test_fixture *f,
-                                               grpc_channel_args *client_args) {
-  micro_fullstack_fixture_data *ffd = f->fixture_data;
-  grpc_connectivity_state conn_state;
-  grpc_connected_subchannel *connected;
-  char *ipv4_localaddr;
-
-  gpr_asprintf(&ipv4_localaddr, "ipv4:%s", ffd->localaddr);
-  ffd->master_channel =
-      channel_create(ipv4_localaddr, client_args, &ffd->sniffed_subchannel);
-  gpr_free(ipv4_localaddr);
-  gpr_log(GPR_INFO, "MASTER CHANNEL %p ", ffd->master_channel);
-  /* the following will block. That's ok for this test */
-  conn_state = grpc_channel_check_connectivity_state(ffd->master_channel,
-                                                     1 /* try to connect */);
-  GPR_ASSERT(conn_state == GRPC_CHANNEL_IDLE);
-
-  /* here sniffed_subchannel should be ready to use */
-  GPR_ASSERT(conn_state == GRPC_CHANNEL_IDLE);
-  GPR_ASSERT(ffd->sniffed_subchannel != NULL);
-
-  connected = connect_subchannel(ffd->sniffed_subchannel);
-  f->client = grpc_client_uchannel_create(ffd->sniffed_subchannel, client_args);
-  grpc_client_uchannel_set_connected_subchannel(f->client, connected);
-  gpr_log(GPR_INFO, "CHANNEL WRAPPING SUBCHANNEL: %p(%p)", f->client,
-          ffd->sniffed_subchannel);
-
-  GPR_ASSERT(f->client);
-}
-
-static void chttp2_init_server_micro_fullstack(grpc_end2end_test_fixture *f,
-                                               grpc_channel_args *server_args) {
-  micro_fullstack_fixture_data *ffd = f->fixture_data;
-  if (f->server) {
-    grpc_server_destroy(f->server);
-  }
-  f->server = grpc_server_create(server_args, NULL);
-  grpc_server_register_completion_queue(f->server, f->cq, NULL);
-  GPR_ASSERT(grpc_server_add_insecure_http2_port(f->server, ffd->localaddr));
-  grpc_server_start(f->server);
-}
-
-static void chttp2_tear_down_micro_fullstack(grpc_end2end_test_fixture *f) {
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  micro_fullstack_fixture_data *ffd = f->fixture_data;
-  grpc_channel_destroy(ffd->master_channel);
-  if (ffd->sniffed_subchannel) {
-    GRPC_SUBCHANNEL_UNREF(&exec_ctx, ffd->sniffed_subchannel, "sniffed");
-  }
-  gpr_free(ffd->localaddr);
-  gpr_free(ffd);
-  grpc_exec_ctx_finish(&exec_ctx);
-}
-
-/* All test configurations */
-static grpc_end2end_test_config configs[] = {
-    {"chttp2/micro_fullstack", 0, chttp2_create_fixture_micro_fullstack,
-     chttp2_init_client_micro_fullstack, chttp2_init_server_micro_fullstack,
-     chttp2_tear_down_micro_fullstack},
-};
-
-int main(int argc, char **argv) {
-  size_t i;
-
-  grpc_test_init(argc, argv);
-  grpc_init();
-
-  for (i = 0; i < sizeof(configs) / sizeof(*configs); i++) {
-    grpc_end2end_tests(argc, argv, configs[i]);
-  }
-
-  grpc_shutdown();
-
-  return 0;
-}
diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index 549120f2bb0b02ad5a33bcbeb750ab5e5ac7ec43..93b48c331c62a677ebfe36a751fa99955086fcd2 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -59,6 +59,7 @@ END2END_FIXTURES = {
         platforms=['linux']),
     'h2_full+poll+pipe': default_unsecure_fixture_options._replace(
         platforms=['linux']),
+    'h2_full+trace': default_unsecure_fixture_options._replace(tracing=True),
     'h2_oauth2': default_secure_fixture_options._replace(ci_mac=False),
     'h2_proxy': default_unsecure_fixture_options._replace(includes_proxy=True,
                                                           ci_mac=False),
@@ -66,12 +67,11 @@ END2END_FIXTURES = {
         ci_mac=False),
     'h2_sockpair': socketpair_unsecure_fixture_options._replace(ci_mac=False),
     'h2_sockpair+trace': socketpair_unsecure_fixture_options._replace(
-        tracing=True),
+        ci_mac=False, tracing=True),
     'h2_ssl': default_secure_fixture_options,
     'h2_ssl+poll': default_secure_fixture_options._replace(platforms=['linux']),
     'h2_ssl_proxy': default_secure_fixture_options._replace(includes_proxy=True,
                                                             ci_mac=False),
-    'h2_uchannel': default_unsecure_fixture_options._replace(fullstack=False),
     'h2_uds+poll': uds_fixture_options._replace(platforms=['linux']),
     'h2_uds': uds_fixture_options,
 }
diff --git a/test/core/end2end/invalid_call_argument_test.c b/test/core/end2end/invalid_call_argument_test.c
index 4029e96a416babc6464b3b52b08bcc80de6a3b86..2fa1a0a1080f87bbfae5d9a139b7682a543805a9 100644
--- a/test/core/end2end/invalid_call_argument_test.c
+++ b/test/core/end2end/invalid_call_argument_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -145,6 +145,8 @@ static void cleanup_test() {
 }
 
 static void test_non_null_reserved_on_start_batch() {
+  gpr_log(GPR_INFO, "test_non_null_reserved_on_start_batch");
+
   prepare_test(1);
   GPR_ASSERT(GRPC_CALL_ERROR ==
              grpc_call_start_batch(g_state.call, NULL, 0, NULL, tag(1)));
@@ -152,6 +154,8 @@ static void test_non_null_reserved_on_start_batch() {
 }
 
 static void test_non_null_reserved_on_op() {
+  gpr_log(GPR_INFO, "test_non_null_reserved_on_op");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -168,6 +172,8 @@ static void test_non_null_reserved_on_op() {
 }
 
 static void test_send_initial_metadata_more_than_once() {
+  gpr_log(GPR_INFO, "test_send_initial_metadata_more_than_once");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -196,6 +202,8 @@ static void test_send_initial_metadata_more_than_once() {
 }
 
 static void test_too_many_metadata() {
+  gpr_log(GPR_INFO, "test_too_many_metadata");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -212,6 +220,8 @@ static void test_too_many_metadata() {
 }
 
 static void test_send_null_message() {
+  gpr_log(GPR_INFO, "test_send_null_message");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -233,6 +243,8 @@ static void test_send_null_message() {
 }
 
 static void test_send_messages_at_the_same_time() {
+  gpr_log(GPR_INFO, "test_send_messages_at_the_same_time");
+
   grpc_op *op;
   gpr_slice request_payload_slice = gpr_slice_from_copied_string("hello world");
   grpc_byte_buffer *request_payload =
@@ -262,6 +274,8 @@ static void test_send_messages_at_the_same_time() {
 }
 
 static void test_send_server_status_from_client() {
+  gpr_log(GPR_INFO, "test_send_server_status_from_client");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -280,6 +294,8 @@ static void test_send_server_status_from_client() {
 }
 
 static void test_receive_initial_metadata_twice_at_client() {
+  gpr_log(GPR_INFO, "test_receive_initial_metadata_twice_at_client");
+
   grpc_op *op;
   prepare_test(1);
   op = g_state.ops;
@@ -306,6 +322,8 @@ static void test_receive_initial_metadata_twice_at_client() {
 }
 
 static void test_receive_message_with_invalid_flags() {
+  gpr_log(GPR_INFO, "test_receive_message_with_invalid_flags");
+
   grpc_op *op;
   grpc_byte_buffer *payload = NULL;
   prepare_test(1);
@@ -322,6 +340,8 @@ static void test_receive_message_with_invalid_flags() {
 }
 
 static void test_receive_two_messages_at_the_same_time() {
+  gpr_log(GPR_INFO, "test_receive_two_messages_at_the_same_time");
+
   grpc_op *op;
   grpc_byte_buffer *payload = NULL;
   prepare_test(1);
@@ -343,6 +363,8 @@ static void test_receive_two_messages_at_the_same_time() {
 }
 
 static void test_recv_close_on_server_from_client() {
+  gpr_log(GPR_INFO, "test_recv_close_on_server_from_client");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -359,6 +381,8 @@ static void test_recv_close_on_server_from_client() {
 }
 
 static void test_recv_status_on_client_twice() {
+  gpr_log(GPR_INFO, "test_recv_status_on_client_twice");
+
   grpc_op *op;
   prepare_test(1);
 
@@ -395,6 +419,8 @@ static void test_recv_status_on_client_twice() {
 }
 
 static void test_send_close_from_client_on_server() {
+  gpr_log(GPR_INFO, "test_send_close_from_client_on_server");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -410,6 +436,8 @@ static void test_send_close_from_client_on_server() {
 }
 
 static void test_recv_status_on_client_from_server() {
+  gpr_log(GPR_INFO, "test_recv_status_on_client_from_server");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -431,6 +459,8 @@ static void test_recv_status_on_client_from_server() {
 }
 
 static void test_send_status_from_server_with_invalid_flags() {
+  gpr_log(GPR_INFO, "test_send_status_from_server_with_invalid_flags");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -449,6 +479,8 @@ static void test_send_status_from_server_with_invalid_flags() {
 }
 
 static void test_too_many_trailing_metadata() {
+  gpr_log(GPR_INFO, "test_too_many_trailing_metadata");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -468,6 +500,8 @@ static void test_too_many_trailing_metadata() {
 }
 
 static void test_send_server_status_twice() {
+  gpr_log(GPR_INFO, "test_send_server_status_twice");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -493,6 +527,8 @@ static void test_send_server_status_twice() {
 }
 
 static void test_recv_close_on_server_with_invalid_flags() {
+  gpr_log(GPR_INFO, "test_recv_close_on_server_with_invalid_flags");
+
   grpc_op *op;
   prepare_test(0);
 
@@ -509,6 +545,8 @@ static void test_recv_close_on_server_with_invalid_flags() {
 }
 
 static void test_recv_close_on_server_twice() {
+  gpr_log(GPR_INFO, "test_recv_close_on_server_twice");
+
   grpc_op *op;
   prepare_test(0);
 
diff --git a/test/core/httpcli/format_request_test.c b/test/core/http/format_request_test.c
similarity index 90%
rename from test/core/httpcli/format_request_test.c
rename to test/core/http/format_request_test.c
index da850049e20dafed7e32a7b11f26b5463b1b760a..67dfd248033ed008202a5ac0114da9ef1b29a3a5 100644
--- a/test/core/httpcli/format_request_test.c
+++ b/test/core/http/format_request_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/format_request.h"
+#include "src/core/http/format_request.h"
 
 #include <string.h>
 
@@ -39,15 +39,15 @@
 #include "test/core/util/test_config.h"
 
 static void test_format_get_request(void) {
-  grpc_httpcli_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {"x-yz", "abc"};
   grpc_httpcli_request req;
   gpr_slice slice;
 
   memset(&req, 0, sizeof(req));
   req.host = "example.com";
-  req.path = "/index.html";
-  req.hdr_count = 1;
-  req.hdrs = &hdr;
+  req.http.path = "/index.html";
+  req.http.hdr_count = 1;
+  req.http.hdrs = &hdr;
 
   slice = grpc_httpcli_format_get_request(&req);
 
@@ -64,7 +64,7 @@ static void test_format_get_request(void) {
 }
 
 static void test_format_post_request(void) {
-  grpc_httpcli_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {"x-yz", "abc"};
   grpc_httpcli_request req;
   gpr_slice slice;
   char body_bytes[] = "fake body";
@@ -72,9 +72,9 @@ static void test_format_post_request(void) {
 
   memset(&req, 0, sizeof(req));
   req.host = "example.com";
-  req.path = "/index.html";
-  req.hdr_count = 1;
-  req.hdrs = &hdr;
+  req.http.path = "/index.html";
+  req.http.hdr_count = 1;
+  req.http.hdrs = &hdr;
 
   slice = grpc_httpcli_format_post_request(&req, body_bytes, body_len);
 
@@ -94,15 +94,15 @@ static void test_format_post_request(void) {
 }
 
 static void test_format_post_request_no_body(void) {
-  grpc_httpcli_header hdr = {"x-yz", "abc"};
+  grpc_http_header hdr = {"x-yz", "abc"};
   grpc_httpcli_request req;
   gpr_slice slice;
 
   memset(&req, 0, sizeof(req));
   req.host = "example.com";
-  req.path = "/index.html";
-  req.hdr_count = 1;
-  req.hdrs = &hdr;
+  req.http.path = "/index.html";
+  req.http.hdr_count = 1;
+  req.http.hdrs = &hdr;
 
   slice = grpc_httpcli_format_post_request(&req, NULL, 0);
 
@@ -119,7 +119,7 @@ static void test_format_post_request_no_body(void) {
 }
 
 static void test_format_post_request_content_type_override(void) {
-  grpc_httpcli_header hdrs[2];
+  grpc_http_header hdrs[2];
   grpc_httpcli_request req;
   gpr_slice slice;
   char body_bytes[] = "fake%20body";
@@ -131,9 +131,9 @@ static void test_format_post_request_content_type_override(void) {
   hdrs[1].value = "application/x-www-form-urlencoded";
   memset(&req, 0, sizeof(req));
   req.host = "example.com";
-  req.path = "/index.html";
-  req.hdr_count = 2;
-  req.hdrs = hdrs;
+  req.http.path = "/index.html";
+  req.http.hdr_count = 2;
+  req.http.hdrs = hdrs;
 
   slice = grpc_httpcli_format_post_request(&req, body_bytes, body_len);
 
diff --git a/test/core/httpcli/httpcli_test.c b/test/core/http/httpcli_test.c
similarity index 97%
rename from test/core/httpcli/httpcli_test.c
rename to test/core/http/httpcli_test.c
index fbc5d4abe722e86e40792d2378362c479ec82b72..bdb7a02e9b050fe418b7b303c5818d3a756402c2 100644
--- a/test/core/httpcli/httpcli_test.c
+++ b/test/core/http/httpcli_test.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 
 #include <string.h>
 
@@ -83,7 +83,7 @@ static void test_get(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.path = "/get";
+  req.http.path = "/get";
   req.handshaker = &grpc_httpcli_plaintext;
 
   grpc_httpcli_get(&exec_ctx, &g_context, g_pollset, &req, n_seconds_time(15),
@@ -114,7 +114,7 @@ static void test_post(int port) {
 
   memset(&req, 0, sizeof(req));
   req.host = host;
-  req.path = "/post";
+  req.http.path = "/post";
   req.handshaker = &grpc_httpcli_plaintext;
 
   grpc_httpcli_post(&exec_ctx, &g_context, g_pollset, &req, "hello", 5,
@@ -161,7 +161,7 @@ int main(int argc, char **argv) {
   } else {
     arg_shift = 1;
     gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
-    gpr_asprintf(&args[1], "%s/../../test/core/httpcli/test_server.py", root);
+    gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
   }
 
   /* start the server */
diff --git a/test/core/httpcli/httpscli_test.c b/test/core/http/httpscli_test.c
similarity index 97%
rename from test/core/httpcli/httpscli_test.c
rename to test/core/http/httpscli_test.c
index 04c57db286cbfeea343068a618091ef5ce3595bb..21845b6a8e1773ef86d7220ba6a24f82cd5a44e9 100644
--- a/test/core/httpcli/httpscli_test.c
+++ b/test/core/http/httpscli_test.c
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 
 #include <string.h>
 
@@ -84,7 +84,7 @@ static void test_get(int port) {
   memset(&req, 0, sizeof(req));
   req.host = host;
   req.ssl_host_override = "foo.test.google.fr";
-  req.path = "/get";
+  req.http.path = "/get";
   req.handshaker = &grpc_httpcli_ssl;
 
   grpc_httpcli_get(&exec_ctx, &g_context, g_pollset, &req, n_seconds_time(15),
@@ -116,7 +116,7 @@ static void test_post(int port) {
   memset(&req, 0, sizeof(req));
   req.host = host;
   req.ssl_host_override = "foo.test.google.fr";
-  req.path = "/post";
+  req.http.path = "/post";
   req.handshaker = &grpc_httpcli_ssl;
 
   grpc_httpcli_post(&exec_ctx, &g_context, g_pollset, &req, "hello", 5,
@@ -163,7 +163,7 @@ int main(int argc, char **argv) {
   } else {
     arg_shift = 1;
     gpr_asprintf(&args[0], "%s/../../tools/distrib/python_wrapper.sh", root);
-    gpr_asprintf(&args[1], "%s/../../test/core/httpcli/test_server.py", root);
+    gpr_asprintf(&args[1], "%s/../../test/core/http/test_server.py", root);
   }
 
   /* start the server */
diff --git a/test/core/httpcli/parser_test.c b/test/core/http/parser_test.c
similarity index 50%
rename from test/core/httpcli/parser_test.c
rename to test/core/http/parser_test.c
index a26ddd28214614a83e62af613a041f5c6a882164..338a3015348055b82406cc8d5211580d4ce0a682 100644
--- a/test/core/httpcli/parser_test.c
+++ b/test/core/http/parser_test.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,7 +31,7 @@
  *
  */
 
-#include "src/core/httpcli/parser.h"
+#include "src/core/http/parser.h"
 
 #include <stdarg.h>
 #include <string.h>
@@ -43,9 +43,65 @@
 #include "test/core/util/slice_splitter.h"
 #include "test/core/util/test_config.h"
 
+static void test_request_succeeds(grpc_slice_split_mode split_mode,
+                                  char *request, char *expect_method,
+                                  grpc_http_version expect_version,
+                                  char *expect_path, char *expect_body, ...) {
+  grpc_http_parser parser;
+  gpr_slice input_slice = gpr_slice_from_copied_string(request);
+  size_t num_slices;
+  size_t i;
+  gpr_slice *slices;
+  va_list args;
+
+  grpc_split_slices(split_mode, &input_slice, 1, &slices, &num_slices);
+  gpr_slice_unref(input_slice);
+
+  grpc_http_parser_init(&parser);
+
+  for (i = 0; i < num_slices; i++) {
+    GPR_ASSERT(grpc_http_parser_parse(&parser, slices[i]));
+    gpr_slice_unref(slices[i]);
+  }
+  GPR_ASSERT(grpc_http_parser_eof(&parser));
+
+  GPR_ASSERT(GRPC_HTTP_REQUEST == parser.type);
+  GPR_ASSERT(0 == strcmp(expect_method, parser.http.request.method));
+  GPR_ASSERT(0 == strcmp(expect_path, parser.http.request.path));
+  GPR_ASSERT(expect_version == parser.http.request.version);
+
+  if (expect_body != NULL) {
+    GPR_ASSERT(strlen(expect_body) == parser.http.request.body_length);
+    GPR_ASSERT(0 == memcmp(expect_body, parser.http.request.body,
+                           parser.http.request.body_length));
+  } else {
+    GPR_ASSERT(parser.http.request.body_length == 0);
+  }
+
+  va_start(args, expect_body);
+  i = 0;
+  for (;;) {
+    char *expect_key;
+    char *expect_value;
+    expect_key = va_arg(args, char *);
+    if (!expect_key) break;
+    GPR_ASSERT(i < parser.http.request.hdr_count);
+    expect_value = va_arg(args, char *);
+    GPR_ASSERT(expect_value);
+    GPR_ASSERT(0 == strcmp(expect_key, parser.http.request.hdrs[i].key));
+    GPR_ASSERT(0 == strcmp(expect_value, parser.http.request.hdrs[i].value));
+    i++;
+  }
+  va_end(args);
+  GPR_ASSERT(i == parser.http.request.hdr_count);
+
+  grpc_http_parser_destroy(&parser);
+  gpr_free(slices);
+}
+
 static void test_succeeds(grpc_slice_split_mode split_mode, char *response,
                           int expect_status, char *expect_body, ...) {
-  grpc_httpcli_parser parser;
+  grpc_http_parser parser;
   gpr_slice input_slice = gpr_slice_from_copied_string(response);
   size_t num_slices;
   size_t i;
@@ -55,20 +111,22 @@ static void test_succeeds(grpc_slice_split_mode split_mode, char *response,
   grpc_split_slices(split_mode, &input_slice, 1, &slices, &num_slices);
   gpr_slice_unref(input_slice);
 
-  grpc_httpcli_parser_init(&parser);
+  grpc_http_parser_init(&parser);
 
   for (i = 0; i < num_slices; i++) {
-    GPR_ASSERT(grpc_httpcli_parser_parse(&parser, slices[i]));
+    GPR_ASSERT(grpc_http_parser_parse(&parser, slices[i]));
     gpr_slice_unref(slices[i]);
   }
-  GPR_ASSERT(grpc_httpcli_parser_eof(&parser));
+  GPR_ASSERT(grpc_http_parser_eof(&parser));
 
-  GPR_ASSERT(expect_status == parser.r.status);
+  GPR_ASSERT(GRPC_HTTP_RESPONSE == parser.type);
+  GPR_ASSERT(expect_status == parser.http.response.status);
   if (expect_body != NULL) {
-    GPR_ASSERT(strlen(expect_body) == parser.r.body_length);
-    GPR_ASSERT(0 == memcmp(expect_body, parser.r.body, parser.r.body_length));
+    GPR_ASSERT(strlen(expect_body) == parser.http.response.body_length);
+    GPR_ASSERT(0 == memcmp(expect_body, parser.http.response.body,
+                           parser.http.response.body_length));
   } else {
-    GPR_ASSERT(parser.r.body_length == 0);
+    GPR_ASSERT(parser.http.response.body_length == 0);
   }
 
   va_start(args, expect_body);
@@ -78,22 +136,22 @@ static void test_succeeds(grpc_slice_split_mode split_mode, char *response,
     char *expect_value;
     expect_key = va_arg(args, char *);
     if (!expect_key) break;
-    GPR_ASSERT(i < parser.r.hdr_count);
+    GPR_ASSERT(i < parser.http.response.hdr_count);
     expect_value = va_arg(args, char *);
     GPR_ASSERT(expect_value);
-    GPR_ASSERT(0 == strcmp(expect_key, parser.r.hdrs[i].key));
-    GPR_ASSERT(0 == strcmp(expect_value, parser.r.hdrs[i].value));
+    GPR_ASSERT(0 == strcmp(expect_key, parser.http.response.hdrs[i].key));
+    GPR_ASSERT(0 == strcmp(expect_value, parser.http.response.hdrs[i].value));
     i++;
   }
   va_end(args);
-  GPR_ASSERT(i == parser.r.hdr_count);
+  GPR_ASSERT(i == parser.http.response.hdr_count);
 
-  grpc_httpcli_parser_destroy(&parser);
+  grpc_http_parser_destroy(&parser);
   gpr_free(slices);
 }
 
 static void test_fails(grpc_slice_split_mode split_mode, char *response) {
-  grpc_httpcli_parser parser;
+  grpc_http_parser parser;
   gpr_slice input_slice = gpr_slice_from_copied_string(response);
   size_t num_slices;
   size_t i;
@@ -103,20 +161,20 @@ static void test_fails(grpc_slice_split_mode split_mode, char *response) {
   grpc_split_slices(split_mode, &input_slice, 1, &slices, &num_slices);
   gpr_slice_unref(input_slice);
 
-  grpc_httpcli_parser_init(&parser);
+  grpc_http_parser_init(&parser);
 
   for (i = 0; i < num_slices; i++) {
-    if (!done && !grpc_httpcli_parser_parse(&parser, slices[i])) {
+    if (!done && !grpc_http_parser_parse(&parser, slices[i])) {
       done = 1;
     }
     gpr_slice_unref(slices[i]);
   }
-  if (!done && !grpc_httpcli_parser_eof(&parser)) {
+  if (!done && !grpc_http_parser_eof(&parser)) {
     done = 1;
   }
   GPR_ASSERT(done);
 
-  grpc_httpcli_parser_destroy(&parser);
+  grpc_http_parser_destroy(&parser);
   gpr_free(slices);
 }
 
@@ -145,6 +203,32 @@ int main(int argc, char **argv) {
                   "\r\n"
                   "hello world!",
                   200, "hello world!", "xyz", "abc", NULL);
+    test_request_succeeds(split_modes[i],
+                          "GET / HTTP/1.0\r\n"
+                          "\r\n",
+                          "GET", GRPC_HTTP_HTTP10, "/", NULL, NULL);
+    test_request_succeeds(split_modes[i],
+                          "GET / HTTP/1.0\r\n"
+                          "\r\n"
+                          "xyz",
+                          "GET", GRPC_HTTP_HTTP10, "/", "xyz", NULL);
+    test_request_succeeds(split_modes[i],
+                          "GET / HTTP/1.1\r\n"
+                          "\r\n"
+                          "xyz",
+                          "GET", GRPC_HTTP_HTTP11, "/", "xyz", NULL);
+    test_request_succeeds(split_modes[i],
+                          "GET / HTTP/2.0\r\n"
+                          "\r\n"
+                          "xyz",
+                          "GET", GRPC_HTTP_HTTP20, "/", "xyz", NULL);
+    test_request_succeeds(split_modes[i],
+                          "GET / HTTP/1.0\r\n"
+                          "xyz: abc\r\n"
+                          "\r\n"
+                          "xyz",
+                          "GET", GRPC_HTTP_HTTP10, "/", "xyz", "xyz", "abc",
+                          NULL);
     test_fails(split_modes[i], "HTTP/1.0\r\n");
     test_fails(split_modes[i], "HTTP/1.2\r\n");
     test_fails(split_modes[i], "HTTP/1.0 000 XYX\r\n");
@@ -157,10 +241,15 @@ int main(int argc, char **argv) {
                "  def\r\n"
                "\r\n"
                "hello world!");
+    test_fails(split_modes[i], "GET\r\n");
+    test_fails(split_modes[i], "GET /\r\n");
+    test_fails(split_modes[i], "GET / HTTP/0.0\r\n");
+    test_fails(split_modes[i], "GET / ____/1.0\r\n");
+    test_fails(split_modes[i], "GET / HTTP/1.2\r\n");
 
-    tmp1 = gpr_malloc(2 * GRPC_HTTPCLI_MAX_HEADER_LENGTH);
-    memset(tmp1, 'a', 2 * GRPC_HTTPCLI_MAX_HEADER_LENGTH - 1);
-    tmp1[2 * GRPC_HTTPCLI_MAX_HEADER_LENGTH - 1] = 0;
+    tmp1 = gpr_malloc(2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH);
+    memset(tmp1, 'a', 2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH - 1);
+    tmp1[2 * GRPC_HTTP_PARSER_MAX_HEADER_LENGTH - 1] = 0;
     gpr_asprintf(&tmp2, "HTTP/1.0 200 OK\r\nxyz: %s\r\n\r\n", tmp1);
     test_fails(split_modes[i], tmp2);
     gpr_free(tmp1);
diff --git a/test/core/httpcli/test_server.py b/test/core/http/test_server.py
similarity index 98%
rename from test/core/httpcli/test_server.py
rename to test/core/http/test_server.py
index dbbf5ceb3c7975b19941d72590107e9643d0daf3..ecde494cc0673101541b99b8e0784bab0d7f5cfd 100755
--- a/test/core/httpcli/test_server.py
+++ b/test/core/http/test_server.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python2.7
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/test/core/iomgr/udp_server_test.c b/test/core/iomgr/udp_server_test.c
index ce3c23b4bf251f9eb29c27531d6638715d0c6174..365b5c002bf6e097f0dbd66e28620da523a83a5b 100644
--- a/test/core/iomgr/udp_server_test.c
+++ b/test/core/iomgr/udp_server_test.c
@@ -34,6 +34,7 @@
 #include "src/core/iomgr/iomgr.h"
 #include "src/core/iomgr/pollset_posix.h"
 #include "src/core/iomgr/udp_server.h"
+#include <grpc/grpc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
diff --git a/test/core/security/credentials_test.c b/test/core/security/credentials_test.c
index 98133ef5e5fc3519c83e20bf514849495bb2a7f9..fd9ccbf45d54a6a18e8e70de1c95b4b0ab52a3d2 100644
--- a/test/core/security/credentials_test.c
+++ b/test/core/security/credentials_test.c
@@ -44,7 +44,7 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/security/json_token.h"
 #include "src/core/support/env.h"
 #include "src/core/support/tmpfile.h"
@@ -536,12 +536,12 @@ static void validate_compute_engine_http_request(
   GPR_ASSERT(request->handshaker != &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "metadata") == 0);
   GPR_ASSERT(
-      strcmp(request->path,
+      strcmp(request->http.path,
              "/computeMetadata/v1/instance/service-accounts/default/token") ==
       0);
-  GPR_ASSERT(request->hdr_count == 1);
-  GPR_ASSERT(strcmp(request->hdrs[0].key, "Metadata-Flavor") == 0);
-  GPR_ASSERT(strcmp(request->hdrs[0].value, "Google") == 0);
+  GPR_ASSERT(request->http.hdr_count == 1);
+  GPR_ASSERT(strcmp(request->http.hdrs[0].key, "Metadata-Flavor") == 0);
+  GPR_ASSERT(strcmp(request->http.hdrs[0].value, "Google") == 0);
 }
 
 static int compute_engine_httpcli_get_success_override(
@@ -639,11 +639,12 @@ static void validate_refresh_token_http_request(
   gpr_free(expected_body);
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, GRPC_GOOGLE_OAUTH2_SERVICE_HOST) == 0);
-  GPR_ASSERT(strcmp(request->path, GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH) == 0);
-  GPR_ASSERT(request->hdr_count == 1);
-  GPR_ASSERT(strcmp(request->hdrs[0].key, "Content-Type") == 0);
   GPR_ASSERT(
-      strcmp(request->hdrs[0].value, "application/x-www-form-urlencoded") == 0);
+      strcmp(request->http.path, GRPC_GOOGLE_OAUTH2_SERVICE_TOKEN_PATH) == 0);
+  GPR_ASSERT(request->http.hdr_count == 1);
+  GPR_ASSERT(strcmp(request->http.hdrs[0].key, "Content-Type") == 0);
+  GPR_ASSERT(strcmp(request->http.hdrs[0].value,
+                    "application/x-www-form-urlencoded") == 0);
 }
 
 static int refresh_token_httpcli_post_success(
@@ -898,12 +899,12 @@ static int default_creds_gce_detection_httpcli_get_success_override(
     gpr_timespec deadline, grpc_httpcli_response_cb on_response,
     void *user_data) {
   grpc_httpcli_response response = http_response(200, "");
-  grpc_httpcli_header header;
+  grpc_http_header header;
   header.key = "Metadata-Flavor";
   header.value = "Google";
   response.hdr_count = 1;
   response.hdrs = &header;
-  GPR_ASSERT(strcmp(request->path, "/") == 0);
+  GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
   on_response(exec_ctx, user_data, &response);
   return 1;
@@ -961,7 +962,7 @@ static int default_creds_gce_detection_httpcli_get_failure_override(
     void *user_data) {
   /* No magic header. */
   grpc_httpcli_response response = http_response(200, "");
-  GPR_ASSERT(strcmp(request->path, "/") == 0);
+  GPR_ASSERT(strcmp(request->http.path, "/") == 0);
   GPR_ASSERT(strcmp(request->host, "metadata.google.internal") == 0);
   on_response(exec_ctx, user_data, &response);
   return 1;
diff --git a/test/core/security/jwt_verifier_test.c b/test/core/security/jwt_verifier_test.c
index f6ec9e12ef37753d95817d3cb17889cf888e3f0f..d2f8d1d182f7e77f1e6587c7da9656d2d4b0e112 100644
--- a/test/core/security/jwt_verifier_test.c
+++ b/test/core/security/jwt_verifier_test.c
@@ -35,7 +35,7 @@
 
 #include <string.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/security/b64.h"
 #include "src/core/security/json_token.h"
 #include "test/core/util/test_config.h"
@@ -288,7 +288,7 @@ static int httpcli_get_google_keys_for_email(
   grpc_httpcli_response response = http_response(200, good_google_email_keys());
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
-  GPR_ASSERT(strcmp(request->path,
+  GPR_ASSERT(strcmp(request->http.path,
                     "/robot/v1/metadata/x509/"
                     "777-abaslkan11hlb6nmim3bpspl31ud@developer."
                     "gserviceaccount.com") == 0);
@@ -336,7 +336,7 @@ static int httpcli_get_custom_keys_for_email(
   grpc_httpcli_response response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "keys.bar.com") == 0);
-  GPR_ASSERT(strcmp(request->path, "/jwk/foo@bar.com") == 0);
+  GPR_ASSERT(strcmp(request->http.path, "/jwk/foo@bar.com") == 0);
   on_response(exec_ctx, user_data, &response);
   gpr_free(response.body);
   return 1;
@@ -372,7 +372,7 @@ static int httpcli_get_jwk_set(grpc_exec_ctx *exec_ctx,
   grpc_httpcli_response response = http_response(200, gpr_strdup(good_jwk_set));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "www.googleapis.com") == 0);
-  GPR_ASSERT(strcmp(request->path, "/oauth2/v3/certs") == 0);
+  GPR_ASSERT(strcmp(request->http.path, "/oauth2/v3/certs") == 0);
   on_response(exec_ctx, user_data, &response);
   gpr_free(response.body);
   return 1;
@@ -387,7 +387,7 @@ static int httpcli_get_openid_config(grpc_exec_ctx *exec_ctx,
       http_response(200, gpr_strdup(good_openid_config));
   GPR_ASSERT(request->handshaker == &grpc_httpcli_ssl);
   GPR_ASSERT(strcmp(request->host, "accounts.google.com") == 0);
-  GPR_ASSERT(strcmp(request->path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
+  GPR_ASSERT(strcmp(request->http.path, GRPC_OPENID_CONFIG_URL_SUFFIX) == 0);
   grpc_httpcli_set_override(httpcli_get_jwk_set,
                             httpcli_post_should_not_be_called);
   on_response(exec_ctx, user_data, &response);
diff --git a/test/core/transport/chttp2/timeout_encoding_test.c b/test/core/transport/chttp2/timeout_encoding_test.c
index 483e79fb2536ccf162c506e4ec81a9deb52df329..b7dd60e9b10f83b79f8e4d51f61758e9f74ac06c 100644
--- a/test/core/transport/chttp2/timeout_encoding_test.c
+++ b/test/core/transport/chttp2/timeout_encoding_test.c
@@ -36,11 +36,11 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
+#include "src/core/support/string.h"
 #include "test/core/util/test_config.h"
 
 #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", x)
@@ -128,11 +128,10 @@ void test_decoding(void) {
   decode_suite('H', gpr_time_from_hours);
   assert_decodes_as("1000000000S",
                     gpr_time_from_seconds(1000 * 1000 * 1000, GPR_TIMESPAN));
-  assert_decodes_as("1000000000000000000000u",
-                    gpr_inf_future(GPR_CLOCK_REALTIME));
-  assert_decodes_as("1000000001S", gpr_inf_future(GPR_CLOCK_REALTIME));
-  assert_decodes_as("2000000001S", gpr_inf_future(GPR_CLOCK_REALTIME));
-  assert_decodes_as("9999999999S", gpr_inf_future(GPR_CLOCK_REALTIME));
+  assert_decodes_as("1000000000000000000000u", gpr_inf_future(GPR_TIMESPAN));
+  assert_decodes_as("1000000001S", gpr_inf_future(GPR_TIMESPAN));
+  assert_decodes_as("2000000001S", gpr_inf_future(GPR_TIMESPAN));
+  assert_decodes_as("9999999999S", gpr_inf_future(GPR_TIMESPAN));
 }
 
 void test_decoding_fails(void) {
diff --git a/test/core/util/port_posix.c b/test/core/util/port_posix.c
index c4bd00c1baa5076ce8d1e1241a319aefc84c8cb2..d211016267690f477a28bfee6ef03163290f60ca 100644
--- a/test/core/util/port_posix.c
+++ b/test/core/util/port_posix.c
@@ -38,7 +38,6 @@
 #include "test/core/util/port.h"
 
 #include <errno.h>
-#include <math.h>
 #include <netinet/in.h>
 #include <stdio.h>
 #include <string.h>
@@ -50,8 +49,9 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/support/env.h"
+#include "test/core/util/port_server_client.h"
 
 #define NUM_RANDOM_PORTS_TO_PICK 100
 
@@ -68,76 +68,12 @@ static int has_port_been_chosen(int port) {
   return 0;
 }
 
-typedef struct freereq {
-  gpr_mu *mu;
-  grpc_pollset *pollset;
-  int done;
-} freereq;
-
-static void destroy_pollset_and_shutdown(grpc_exec_ctx *exec_ctx, void *p,
-                                         bool success) {
-  grpc_pollset_destroy(p);
-  gpr_free(p);
-  grpc_shutdown();
-}
-
-static void freed_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
-                                   const grpc_httpcli_response *response) {
-  freereq *pr = arg;
-  gpr_mu_lock(pr->mu);
-  pr->done = 1;
-  grpc_pollset_kick(pr->pollset, NULL);
-  gpr_mu_unlock(pr->mu);
-}
-
-static void free_port_using_server(char *server, int port) {
-  grpc_httpcli_context context;
-  grpc_httpcli_request req;
-  freereq pr;
-  char *path;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_closure *shutdown_closure;
-
-  grpc_init();
-
-  memset(&pr, 0, sizeof(pr));
-  memset(&req, 0, sizeof(req));
-
-  pr.pollset = gpr_malloc(grpc_pollset_size());
-  grpc_pollset_init(pr.pollset, &pr.mu);
-  shutdown_closure =
-      grpc_closure_create(destroy_pollset_and_shutdown, pr.pollset);
-
-  req.host = server;
-  gpr_asprintf(&path, "/drop/%d", port);
-  req.path = path;
-
-  grpc_httpcli_context_init(&context);
-  grpc_httpcli_get(&exec_ctx, &context, pr.pollset, &req,
-                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), freed_port_from_server,
-                   &pr);
-  gpr_mu_lock(pr.mu);
-  while (!pr.done) {
-    grpc_pollset_worker *worker = NULL;
-    grpc_pollset_work(&exec_ctx, pr.pollset, &worker,
-                      gpr_now(GPR_CLOCK_MONOTONIC),
-                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
-  }
-  gpr_mu_unlock(pr.mu);
-
-  grpc_httpcli_context_destroy(&context);
-  grpc_exec_ctx_finish(&exec_ctx);
-  grpc_pollset_shutdown(&exec_ctx, pr.pollset, shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_free(path);
-}
-
-static void free_chosen_ports() {
+static void free_chosen_ports(void) {
   char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
   if (env != NULL) {
     size_t i;
     for (i = 0; i < num_chosen_ports; i++) {
-      free_port_using_server(env, chosen_ports[i]);
+      grpc_free_port_using_server(env, chosen_ports[i]);
     }
     gpr_free(env);
   }
@@ -205,101 +141,6 @@ static int is_port_available(int *port, int is_tcp) {
   return 1;
 }
 
-typedef struct portreq {
-  gpr_mu *mu;
-  grpc_pollset *pollset;
-  int port;
-  int retries;
-  char *server;
-  grpc_httpcli_context *ctx;
-} portreq;
-
-static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
-                                 const grpc_httpcli_response *response) {
-  size_t i;
-  int port = 0;
-  portreq *pr = arg;
-  int failed = 0;
-
-  if (!response) {
-    failed = 1;
-    gpr_log(GPR_DEBUG,
-            "failed port pick from server: retrying [response=NULL]");
-  } else if (response->status != 200) {
-    failed = 1;
-    gpr_log(GPR_DEBUG, "failed port pick from server: status=%d",
-            response->status);
-  }
-
-  if (failed) {
-    grpc_httpcli_request req;
-    memset(&req, 0, sizeof(req));
-    GPR_ASSERT(pr->retries < 10);
-    sleep(1 + (unsigned)(pow(1.3, pr->retries) * rand() / RAND_MAX));
-    pr->retries++;
-    req.host = pr->server;
-    req.path = "/get";
-    grpc_httpcli_get(exec_ctx, pr->ctx, pr->pollset, &req,
-                     GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
-                     pr);
-    return;
-  }
-  GPR_ASSERT(response);
-  GPR_ASSERT(response->status == 200);
-  for (i = 0; i < response->body_length; i++) {
-    GPR_ASSERT(response->body[i] >= '0' && response->body[i] <= '9');
-    port = port * 10 + response->body[i] - '0';
-  }
-  GPR_ASSERT(port > 1024);
-  gpr_mu_lock(pr->mu);
-  pr->port = port;
-  grpc_pollset_kick(pr->pollset, NULL);
-  gpr_mu_unlock(pr->mu);
-}
-
-static int pick_port_using_server(char *server) {
-  grpc_httpcli_context context;
-  grpc_httpcli_request req;
-  portreq pr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_closure *shutdown_closure;
-
-  grpc_init();
-
-  memset(&pr, 0, sizeof(pr));
-  memset(&req, 0, sizeof(req));
-  pr.pollset = gpr_malloc(grpc_pollset_size());
-  grpc_pollset_init(pr.pollset, &pr.mu);
-  shutdown_closure =
-      grpc_closure_create(destroy_pollset_and_shutdown, pr.pollset);
-  pr.port = -1;
-  pr.server = server;
-  pr.ctx = &context;
-
-  req.host = server;
-  req.path = "/get";
-
-  grpc_httpcli_context_init(&context);
-  grpc_httpcli_get(&exec_ctx, &context, pr.pollset, &req,
-                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
-                   &pr);
-  grpc_exec_ctx_finish(&exec_ctx);
-  gpr_mu_lock(pr.mu);
-  while (pr.port == -1) {
-    grpc_pollset_worker *worker = NULL;
-    grpc_pollset_work(&exec_ctx, pr.pollset, &worker,
-                      gpr_now(GPR_CLOCK_MONOTONIC),
-                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
-  }
-  gpr_mu_unlock(pr.mu);
-
-  grpc_httpcli_context_destroy(&context);
-  grpc_pollset_shutdown(&exec_ctx, pr.pollset, shutdown_closure);
-  grpc_exec_ctx_finish(&exec_ctx);
-
-  return pr.port;
-}
-
 int grpc_pick_unused_port(void) {
   /* We repeatedly pick a port and then see whether or not it is
      available for use both as a TCP socket and a UDP socket.  First, we
@@ -319,7 +160,7 @@ int grpc_pick_unused_port(void) {
 
   char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
   if (env) {
-    int port = pick_port_using_server(env);
+    int port = grpc_pick_port_using_server(env);
     gpr_free(env);
     if (port != 0) {
       chose_port(port);
diff --git a/test/core/util/port_server_client.c b/test/core/util/port_server_client.c
new file mode 100644
index 0000000000000000000000000000000000000000..c7b9d63109cefc7ba014b0b9c347f70512fd4ac5
--- /dev/null
+++ b/test/core/util/port_server_client.c
@@ -0,0 +1,215 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+#include "test/core/util/test_config.h"
+
+#ifdef GRPC_TEST_PICK_PORT
+#include "test/core/util/port_server_client.h"
+
+#include <math.h>
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+
+#include "src/core/http/httpcli.h"
+
+typedef struct freereq {
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  int done;
+} freereq;
+
+static void destroy_pollset_and_shutdown(grpc_exec_ctx *exec_ctx, void *p,
+                                         bool success) {
+  grpc_pollset_destroy(p);
+  gpr_free(p);
+  grpc_shutdown();
+}
+
+static void freed_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
+                                   const grpc_httpcli_response *response) {
+  freereq *pr = arg;
+  gpr_mu_lock(pr->mu);
+  pr->done = 1;
+  grpc_pollset_kick(pr->pollset, NULL);
+  gpr_mu_unlock(pr->mu);
+}
+
+void grpc_free_port_using_server(char *server, int port) {
+  grpc_httpcli_context context;
+  grpc_httpcli_request req;
+  freereq pr;
+  char *path;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_closure *shutdown_closure;
+
+  grpc_init();
+
+  memset(&pr, 0, sizeof(pr));
+  memset(&req, 0, sizeof(req));
+
+  pr.pollset = gpr_malloc(grpc_pollset_size());
+  grpc_pollset_init(pr.pollset, &pr.mu);
+  shutdown_closure =
+      grpc_closure_create(destroy_pollset_and_shutdown, pr.pollset);
+
+  req.host = server;
+  gpr_asprintf(&path, "/drop/%d", port);
+  req.http.path = path;
+
+  grpc_httpcli_context_init(&context);
+  grpc_httpcli_get(&exec_ctx, &context, pr.pollset, &req,
+                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), freed_port_from_server,
+                   &pr);
+  gpr_mu_lock(pr.mu);
+  while (!pr.done) {
+    grpc_pollset_worker *worker = NULL;
+    grpc_pollset_work(&exec_ctx, pr.pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC),
+                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
+  }
+  gpr_mu_unlock(pr.mu);
+
+  grpc_httpcli_context_destroy(&context);
+  grpc_exec_ctx_finish(&exec_ctx);
+  grpc_pollset_shutdown(&exec_ctx, pr.pollset, shutdown_closure);
+  grpc_exec_ctx_finish(&exec_ctx);
+  gpr_free(path);
+}
+
+typedef struct portreq {
+  gpr_mu *mu;
+  grpc_pollset *pollset;
+  int port;
+  int retries;
+  char *server;
+  grpc_httpcli_context *ctx;
+} portreq;
+
+static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
+                                 const grpc_httpcli_response *response) {
+  size_t i;
+  int port = 0;
+  portreq *pr = arg;
+  int failed = 0;
+
+  if (!response) {
+    failed = 1;
+    gpr_log(GPR_DEBUG,
+            "failed port pick from server: retrying [response=NULL]");
+  } else if (response->status != 200) {
+    failed = 1;
+    gpr_log(GPR_DEBUG, "failed port pick from server: status=%d",
+            response->status);
+  }
+
+  if (failed) {
+    grpc_httpcli_request req;
+    memset(&req, 0, sizeof(req));
+    GPR_ASSERT(pr->retries < 10);
+    gpr_sleep_until(gpr_time_add(
+        gpr_now(GPR_CLOCK_REALTIME),
+        gpr_time_from_millis(
+            (int64_t)(1000.0 * (1 + pow(1.3, pr->retries) * rand() / RAND_MAX)),
+            GPR_TIMESPAN)));
+    pr->retries++;
+    req.host = pr->server;
+    req.http.path = "/get";
+    grpc_httpcli_get(exec_ctx, pr->ctx, pr->pollset, &req,
+                     GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
+                     pr);
+    return;
+  }
+  GPR_ASSERT(response);
+  GPR_ASSERT(response->status == 200);
+  for (i = 0; i < response->body_length; i++) {
+    GPR_ASSERT(response->body[i] >= '0' && response->body[i] <= '9');
+    port = port * 10 + response->body[i] - '0';
+  }
+  GPR_ASSERT(port > 1024);
+  gpr_mu_lock(pr->mu);
+  pr->port = port;
+  grpc_pollset_kick(pr->pollset, NULL);
+  gpr_mu_unlock(pr->mu);
+}
+
+int grpc_pick_port_using_server(char *server) {
+  grpc_httpcli_context context;
+  grpc_httpcli_request req;
+  portreq pr;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_closure *shutdown_closure;
+
+  grpc_init();
+
+  memset(&pr, 0, sizeof(pr));
+  memset(&req, 0, sizeof(req));
+  pr.pollset = gpr_malloc(grpc_pollset_size());
+  grpc_pollset_init(pr.pollset, &pr.mu);
+  shutdown_closure =
+      grpc_closure_create(destroy_pollset_and_shutdown, pr.pollset);
+  pr.port = -1;
+  pr.server = server;
+  pr.ctx = &context;
+
+  req.host = server;
+  req.http.path = "/get";
+
+  grpc_httpcli_context_init(&context);
+  grpc_httpcli_get(&exec_ctx, &context, pr.pollset, &req,
+                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
+                   &pr);
+  grpc_exec_ctx_finish(&exec_ctx);
+  gpr_mu_lock(pr.mu);
+  while (pr.port == -1) {
+    grpc_pollset_worker *worker = NULL;
+    grpc_pollset_work(&exec_ctx, pr.pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC),
+                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
+  }
+  gpr_mu_unlock(pr.mu);
+
+  grpc_httpcli_context_destroy(&context);
+  grpc_pollset_shutdown(&exec_ctx, pr.pollset, shutdown_closure);
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  return pr.port;
+}
+
+#endif  // GRPC_TEST_PICK_PORT
diff --git a/test/core/util/port_server_client.h b/test/core/util/port_server_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc209cde5b06016c481b4f58eaeef086deeb93ce
--- /dev/null
+++ b/test/core/util/port_server_client.h
@@ -0,0 +1,42 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_TEST_CORE_UTIL_PORT_SERVER_CLIENT_H
+#define GRPC_TEST_CORE_UTIL_PORT_SERVER_CLIENT_H
+
+// C interface to port_server.py
+
+int grpc_pick_port_using_server(char *server);
+void grpc_free_port_using_server(char *server, int port);
+
+#endif  // GRPC_TEST_CORE_UTIL_PORT_SERVER_CLIENT_H
diff --git a/test/core/util/port_windows.c b/test/core/util/port_windows.c
index 3b20aeb71827906aac51d470fdad3964076766a6..77125dde7570b7e18a9e10d46d35047cbf55cff5 100644
--- a/test/core/util/port_windows.c
+++ b/test/core/util/port_windows.c
@@ -47,8 +47,9 @@
 #include <grpc/support/log.h>
 
 #include "src/core/support/env.h"
-#include "src/core/httpcli/httpcli.h"
+#include "src/core/http/httpcli.h"
 #include "src/core/iomgr/sockaddr_utils.h"
+#include "test/core/util/port_server_client.h"
 
 #define NUM_RANDOM_PORTS_TO_PICK 100
 
@@ -65,7 +66,18 @@ static int has_port_been_chosen(int port) {
   return 0;
 }
 
-static void free_chosen_ports(void) { gpr_free(chosen_ports); }
+static void free_chosen_ports(void) {
+  char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
+  if (env != NULL) {
+    size_t i;
+    for (i = 0; i < num_chosen_ports; i++) {
+      grpc_free_port_using_server(env, chosen_ports[i]);
+    }
+    gpr_free(env);
+  }
+
+  gpr_free(chosen_ports);
+}
 
 static void chose_port(int port) {
   if (chosen_ports == NULL) {
@@ -128,80 +140,6 @@ static int is_port_available(int *port, int is_tcp) {
   return 1;
 }
 
-typedef struct portreq {
-  grpc_pollset *pollset;
-  gpr_mu *mu;
-  int port;
-} portreq;
-
-static void got_port_from_server(grpc_exec_ctx *exec_ctx, void *arg,
-                                 const grpc_httpcli_response *response) {
-  size_t i;
-  int port = 0;
-  portreq *pr = arg;
-  GPR_ASSERT(response);
-  GPR_ASSERT(response->status == 200);
-  for (i = 0; i < response->body_length; i++) {
-    GPR_ASSERT(response->body[i] >= '0' && response->body[i] <= '9');
-    port = port * 10 + response->body[i] - '0';
-  }
-  GPR_ASSERT(port > 1024);
-  gpr_mu_lock(pr->mu);
-  pr->port = port;
-  grpc_pollset_kick(pr->pollset, NULL);
-  gpr_mu_unlock(pr->mu);
-}
-
-static void destroy_pollset_and_shutdown(grpc_exec_ctx *exec_ctx, void *p,
-                                         bool success) {
-  grpc_pollset_destroy(p);
-  grpc_shutdown();
-}
-
-static int pick_port_using_server(char *server) {
-  grpc_httpcli_context context;
-  grpc_httpcli_request req;
-  portreq pr;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  grpc_closure destroy_pollset_closure;
-
-  grpc_init();
-
-  memset(&pr, 0, sizeof(pr));
-  memset(&req, 0, sizeof(req));
-  pr.pollset = gpr_malloc(grpc_pollset_size());
-  grpc_pollset_init(pr.pollset, &pr.mu);
-  pr.port = -1;
-
-  req.host = server;
-  req.path = "/get";
-
-  grpc_httpcli_context_init(&context);
-  grpc_httpcli_get(&exec_ctx, &context, pr.pollset, &req,
-                   GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10), got_port_from_server,
-                   &pr);
-  gpr_mu_lock(pr.mu);
-  while (pr.port == -1) {
-    grpc_pollset_worker *worker = NULL;
-    grpc_pollset_work(&exec_ctx, pr.pollset, &worker,
-                      gpr_now(GPR_CLOCK_MONOTONIC),
-                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
-    gpr_mu_unlock(pr.mu);
-    grpc_exec_ctx_flush(&exec_ctx);
-    gpr_mu_lock(pr.mu);
-  }
-  gpr_mu_unlock(pr.mu);
-
-  grpc_httpcli_context_destroy(&context);
-  grpc_closure_init(&destroy_pollset_closure, destroy_pollset_and_shutdown,
-                    &pr.pollset);
-  grpc_pollset_shutdown(&exec_ctx, pr.pollset, &destroy_pollset_closure);
-  gpr_free(pr.pollset);
-
-  grpc_exec_ctx_finish(&exec_ctx);
-  return pr.port;
-}
-
 int grpc_pick_unused_port(void) {
   /* We repeatedly pick a port and then see whether or not it is
      available for use both as a TCP socket and a UDP socket.  First, we
@@ -221,7 +159,7 @@ int grpc_pick_unused_port(void) {
 
   char *env = gpr_getenv("GRPC_TEST_PORT_SERVER");
   if (env) {
-    int port = pick_port_using_server(env);
+    int port = grpc_pick_port_using_server(env);
     gpr_free(env);
     if (port != 0) {
       return port;
diff --git a/test/core/util/test_config.c b/test/core/util/test_config.c
index bf672e8f677f6cd4e55c01a3e858d2343ab358a2..f408048fdf73eb540eff7ffdfbc5cc36397dfea4 100644
--- a/test/core/util/test_config.c
+++ b/test/core/util/test_config.c
@@ -99,6 +99,7 @@ static void print_current_stack() {
     SymFromAddrW(process, (DWORD64)(callers_stack[i]), 0, symbol);
     fwprintf(stderr, L"*** %d: %016I64X %ls - %016I64X\n", i,
              (DWORD64)callers_stack[i], symbol->Name, (DWORD64)symbol->Address);
+    fflush(stderr);
   }
 
   free(symbol);
@@ -154,6 +155,7 @@ static void print_stack_from_context(CONTEXT c) {
     fwprintf(
         stderr, L"*** %016I64X %ls - %016I64X\n", (DWORD64)(s.AddrPC.Offset),
         has_symbol ? symbol->Name : L"<<no symbol>>", (DWORD64)symbol->Address);
+    fflush(stderr);
   }
 
   free(symbol);
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index 4e6d50ea80f0744e8f963342b688f63b9faccb84..8dad1c2005f99c39bf1a034c1a875e8bf983f1bd 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -135,6 +135,8 @@ class GenericEnd2endTest : public ::testing::Test {
       std::unique_ptr<ByteBuffer> send_buffer =
           SerializeToByteBuffer(&send_request);
       call->Write(*send_buffer, tag(2));
+      // Send ByteBuffer can be destroyed after calling Write.
+      send_buffer.reset();
       client_ok(2);
       call->WritesDone(tag(3));
       client_ok(3);
@@ -154,6 +156,7 @@ class GenericEnd2endTest : public ::testing::Test {
       send_response.set_message(recv_request.message());
       send_buffer = SerializeToByteBuffer(&send_response);
       stream.Write(*send_buffer, tag(6));
+      send_buffer.reset();
       server_ok(6);
 
       stream.Finish(Status::OK, tag(7));
@@ -223,6 +226,7 @@ TEST_F(GenericEnd2endTest, SimpleBidiStreaming) {
   std::unique_ptr<ByteBuffer> send_buffer =
       SerializeToByteBuffer(&send_request);
   cli_stream->Write(*send_buffer, tag(3));
+  send_buffer.reset();
   client_ok(3);
 
   ByteBuffer recv_buffer;
@@ -234,6 +238,7 @@ TEST_F(GenericEnd2endTest, SimpleBidiStreaming) {
   send_response.set_message(recv_request.message());
   send_buffer = SerializeToByteBuffer(&send_response);
   srv_stream.Write(*send_buffer, tag(5));
+  send_buffer.reset();
   server_ok(5);
 
   cli_stream->Read(&recv_buffer, tag(6));
diff --git a/test/cpp/qps/limit_cores.cc b/test/cpp/qps/limit_cores.cc
index fad9a323afd191691c58f8b0786b05720857d89c..59ed369067f64231e4919299b14a21a627aef354 100644
--- a/test/cpp/qps/limit_cores.cc
+++ b/test/cpp/qps/limit_cores.cc
@@ -37,14 +37,15 @@
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 
-namespace grpc {
-namespace testing {
-
 #ifdef GPR_CPU_LINUX
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
 #include <sched.h>
+
+namespace grpc {
+namespace testing {
+
 int LimitCores(const int* cores, int cores_size) {
   const int num_cores = gpr_cpu_num_cores();
   int cores_set = 0;
@@ -71,9 +72,16 @@ int LimitCores(const int* cores, int cores_size) {
   CPU_FREE(cpup);
   return cores_set;
 }
+
+}  // namespace testing
+}  // namespace grpc
 #else
+namespace grpc {
+namespace testing {
+
 // LimitCores is not currently supported for non-Linux platforms
 int LimitCores(const int*, int) { return gpr_cpu_num_cores(); }
-#endif
+
 }  // namespace testing
 }  // namespace grpc
+#endif
diff --git a/test/cpp/util/byte_buffer_test.cc b/test/cpp/util/byte_buffer_test.cc
index f36c32cac5b1d47527a2594875efcb8148ec8688..eb9dabcc2a79f484dcfd620cff89e363cf2a8bc5 100644
--- a/test/cpp/util/byte_buffer_test.cc
+++ b/test/cpp/util/byte_buffer_test.cc
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -105,6 +105,24 @@ TEST_F(ByteBufferTest, Dump) {
   EXPECT_TRUE(SliceEqual(slices[1], world));
 }
 
+TEST_F(ByteBufferTest, SerializationMakesCopy) {
+  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
+  gpr_slice world = gpr_slice_from_copied_string(kContent2);
+  std::vector<Slice> slices;
+  slices.push_back(Slice(hello, Slice::STEAL_REF));
+  slices.push_back(Slice(world, Slice::STEAL_REF));
+  grpc_byte_buffer* send_buffer = nullptr;
+  bool owned = false;
+  ByteBuffer buffer(&slices[0], 2);
+  slices.clear();
+  auto status = SerializationTraits<ByteBuffer, void>::Serialize(
+      buffer, &send_buffer, &owned);
+  EXPECT_TRUE(status.ok());
+  EXPECT_TRUE(owned);
+  EXPECT_TRUE(send_buffer != nullptr);
+  grpc_byte_buffer_destroy(send_buffer);
+}
+
 }  // namespace
 }  // namespace grpc
 
diff --git a/third_party/boringssl b/third_party/boringssl
index 9f897b25800d2f54f5c442ef01a60721aeca6d87..907ae62b9d81121cb86b604f83e6b811a43f7a87 160000
--- a/third_party/boringssl
+++ b/third_party/boringssl
@@ -1 +1 @@
-Subproject commit 9f897b25800d2f54f5c442ef01a60721aeca6d87
+Subproject commit 907ae62b9d81121cb86b604f83e6b811a43f7a87
diff --git a/tools/codegen/core/gen_static_metadata.py b/tools/codegen/core/gen_static_metadata.py
index e6ae00e61126dc8269305a8dd966e8e71c6d111d..593baec7fc5a9f1609fbe6f9a7df595042ff4eab 100755
--- a/tools/codegen/core/gen_static_metadata.py
+++ b/tools/codegen/core/gen_static_metadata.py
@@ -196,7 +196,7 @@ for mask in range(1, 1<<len(COMPRESSION_ALGORITHMS)):
   all_strs.add(val)
   all_elems.add(elem)
   compression_elems.append(elem)
-  static_userdata[elem] = 1 + mask
+  static_userdata[elem] = 1 + (mask | 1)
 all_strs = sorted(list(all_strs), key=mangle)
 all_elems = sorted(list(all_elems), key=mangle)
 
diff --git a/tools/distrib/check_include_guards.py b/tools/distrib/check_include_guards.py
new file mode 100755
index 0000000000000000000000000000000000000000..977f40e0b3ec873b1a84849471ae194d81b63f59
--- /dev/null
+++ b/tools/distrib/check_include_guards.py
@@ -0,0 +1,197 @@
+#!/usr/bin/env python2.7
+
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+import argparse
+import os
+import re
+import sys
+import subprocess
+
+
+def build_valid_guard(fpath):
+  prefix = 'GRPC_' if not fpath.startswith('include/') else ''
+  return prefix + '_'.join(fpath.replace('++', 'XX').replace('.', '_').upper().split('/')[1:])
+
+
+def load(fpath):
+  with open(fpath, 'r') as f:
+    return f.read()
+
+
+def save(fpath, contents):
+  with open(fpath, 'w') as f:
+    f.write(contents)
+
+
+class GuardValidator(object):
+  def __init__(self):
+    self.ifndef_re = re.compile(r'#ifndef ([A-Z][A-Z_1-9]*)')
+    self.define_re = re.compile(r'#define ([A-Z][A-Z_1-9]*)')
+    self.endif_c_re = re.compile(r'#endif /\* ([A-Z][A-Z_1-9]*) \*/')
+    self.endif_cpp_re = re.compile(r'#endif  // ([A-Z][A-Z_1-9]*)')
+    self.failed = False
+
+  def fail(self, fpath, regexp, fcontents, match_txt, correct, fix):
+    cpp_header = 'grpc++' in fpath
+    self.failed = True
+    invalid_guards_msg_template = (
+        '{0}: Missing preprocessor guards (RE {1}). '
+        'Please wrap your code around the following guards:\n'
+        '#ifndef {2}\n'
+        '#define {2}\n'
+        '...\n'
+        '... epic code ...\n'
+        '...\n') + ('#endif  // {2}' if cpp_header else '#endif /* {2} */')
+    if not match_txt:
+      print invalid_guards_msg_template.format(fpath, regexp.pattern,
+                                               build_valid_guard(fpath))
+      return fcontents
+
+    print ('{}: Wrong preprocessor guards (RE {}):'
+           '\n\tFound {}, expected {}').format(
+        fpath, regexp.pattern, match_txt, correct)
+    if fix:
+      print 'Fixing {}...\n'.format(fpath)
+      fixed_fcontents = re.sub(match_txt, correct, fcontents)
+      if fixed_fcontents:
+        self.failed = False
+      return fixed_fcontents
+    else:
+      print
+    return fcontents
+
+  def check(self, fpath, fix):
+    cpp_header = 'grpc++' in fpath
+    valid_guard = build_valid_guard(fpath)
+
+    fcontents = load(fpath)
+
+    match = self.ifndef_re.search(fcontents)
+    if match.lastindex is None:
+      # No ifndef. Request manual addition with hints
+      self.fail(fpath, match.re, match.string, '', '', False)
+      return False  # failed
+
+    # Does the guard end with a '_H'?
+    running_guard = match.group(1)
+    if not running_guard.endswith('_H'):
+      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
+                            valid_guard, fix)
+      if fix: save(fpath, fcontents)
+
+    # Is it the expected one based on the file path?
+    if running_guard != valid_guard:
+      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
+                            valid_guard, fix)
+      if fix: save(fpath, fcontents)
+
+    # Is there a #define? Is it the same as the #ifndef one?
+    match = self.define_re.search(fcontents)
+    if match.lastindex is None:
+      # No define. Request manual addition with hints
+      self.fail(fpath, match.re, match.string, '', '', False)
+      return False  # failed
+
+    # Is the #define guard the same as the #ifndef guard?
+    if match.group(1) != running_guard:
+      fcontents = self.fail(fpath, match.re, match.string, match.group(1),
+                            valid_guard, fix)
+      if fix: save(fpath, fcontents)
+
+    # Is there a properly commented #endif?
+    endif_re = self.endif_cpp_re if cpp_header else self.endif_c_re
+    flines = fcontents.rstrip().splitlines()
+    match = endif_re.search(flines[-1])
+    if not match:
+      # No endif. Check if we have the last line as just '#endif' and if so
+      # replace it with a properly commented one.
+      if flines[-1] == '#endif':
+        flines[-1] = ('#endif' +
+                      ('  // {}\n'.format(valid_guard) if cpp_header
+                       else ' /* {} */\n'.format(valid_guard)))
+        if fix:
+            fcontents = '\n'.join(flines)
+            save(fpath, fcontents)
+      else:
+        # something else is wrong, bail out
+        self.fail(fpath, endif_re, flines[-1], '', '', False)
+    elif match.group(1) != running_guard:
+      # Is the #endif guard the same as the #ifndef and #define guards?
+      fcontents = self.fail(fpath, endif_re, fcontents, match.group(1),
+                            valid_guard, fix)
+      if fix: save(fpath, fcontents)
+
+    return not self.failed  # Did the check succeed? (ie, not failed)
+
+# find our home
+ROOT = os.path.abspath(
+    os.path.join(os.path.dirname(sys.argv[0]), '../..'))
+os.chdir(ROOT)
+
+# parse command line
+argp = argparse.ArgumentParser(description='include guard checker')
+argp.add_argument('-f', '--fix',
+                  default=False,
+                  action='store_true');
+argp.add_argument('--precommit',
+                  default=False,
+                  action='store_true')
+args = argp.parse_args()
+
+KNOWN_BAD = set([
+    'src/core/proto/grpc/lb/v0/load_balancer.pb.h',
+])
+
+
+grep_filter = r"grep -E '^(include|src/core)/.*\.h$'"
+if args.precommit:
+  git_command = 'git diff --name-only HEAD'
+else:
+  git_command = 'git ls-tree -r --name-only -r HEAD'
+
+FILE_LIST_COMMAND = ' | '.join((git_command, grep_filter))
+
+# scan files
+ok = True
+filename_list = []
+try:
+  filename_list = subprocess.check_output(FILE_LIST_COMMAND,
+                                          shell=True).splitlines()
+except subprocess.CalledProcessError:
+  sys.exit(0)
+
+validator = GuardValidator()
+
+for filename in filename_list:
+  if filename in KNOWN_BAD: continue
+  ok = validator.check(filename, args.fix)
+
+sys.exit(0 if ok else 1)
diff --git a/tools/distrib/check_nanopb_output.sh b/tools/distrib/check_nanopb_output.sh
index 5f49ebb93e645981c3e15c2c624866eea2e7c1b9..51c4d75041266fffce1d51c6cce1157f8583ef1a 100755
--- a/tools/distrib/check_nanopb_output.sh
+++ b/tools/distrib/check_nanopb_output.sh
@@ -30,8 +30,6 @@
 
 set -ex
 
-apt-get install -y autoconf automake libtool curl python-virtualenv
-
 readonly NANOPB_TMP_OUTPUT="$(mktemp -d)"
 
 # install protoc version 3
diff --git a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
index e3ed39dfe6c09901081d7f1ab345e4e87ca43b37..b848f233b701b09935a71bf7aa0a6bcad228a55f 100644
--- a/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_jessie_x64/Dockerfile
@@ -67,6 +67,39 @@ RUN apt-get update && apt-get install -y time && apt-get clean
 # C++ dependencies
 RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
 
+#=================
+# Update clang to a version with improved tsan
+
+RUN apt-get update && apt-get -y install python cmake && apt-get clean
+
+RUN git clone -n -b release_38 http://llvm.org/git/llvm.git && \
+  cd llvm && git checkout ad57503 && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/clang.git && \
+  cd clang && git checkout ad2c56e && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/compiler-rt.git && \
+  cd compiler-rt && git checkout 3176922 && cd ..
+RUN git clone -n -b release_38 \
+  http://llvm.org/git/clang-tools-extra.git && cd clang-tools-extra && \
+  git checkout c288525 && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/libcxx.git && \
+  cd libcxx && git checkout fda3549  && cd ..
+RUN git clone -n -b release_38 http://llvm.org/git/libcxxabi.git && \
+  cd libcxxabi && git checkout 8d4e51d && cd ..
+
+RUN mv clang llvm/tools
+RUN mv compiler-rt llvm/projects
+RUN mv clang-tools-extra llvm/tools/clang/tools
+RUN mv libcxx llvm/projects
+RUN mv libcxxabi llvm/projects
+
+RUN mkdir llvm-build
+RUN cd llvm-build && cmake \
+  -DCMAKE_BUILD_TYPE:STRING=Release \
+  -DCMAKE_INSTALL_PREFIX:STRING=/usr \
+  -DLLVM_TARGETS_TO_BUILD:STRING=X86 \
+  ../llvm
+RUN make -C llvm-build && make -C llvm-build install && rm -rf llvm-build
+
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
 RUN ln -s /usr/bin/ccache /usr/local/bin/g++
diff --git a/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile b/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
similarity index 82%
rename from tools/dockerfile/test/cxx_squeeze_x64/Dockerfile
rename to tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
index b7f95aaa8d98a6a3f6f6bc18238fd72c01b2be8c..6f330f9166c560a9511689a1b77bb9f372037a03 100644
--- a/tools/dockerfile/test/cxx_squeeze_x64/Dockerfile
+++ b/tools/dockerfile/test/cxx_wheezy_x64/Dockerfile
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-FROM debian:squeeze
+FROM debian:wheezy
 
 # Install Git and basic packages.
 RUN apt-get update && apt-get install -y \
@@ -40,6 +40,7 @@ RUN apt-get update && apt-get install -y \
   gcc \
   gcc-multilib \
   git \
+  golang \
   gyp \
   lcov \
   libc6 \
@@ -62,16 +63,18 @@ RUN apt-get update && apt-get install -y \
 # Build profiling
 RUN apt-get update && apt-get install -y time && apt-get clean
 
+#=================
+# C++ dependencies
+RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
 
-# libgflags-dev is not available on squeezy
-RUN apt-get update && apt-get -y install libgtest-dev libc++-dev clang && apt-get clean
 
-RUN apt-get update && apt-get -y install python-pip && apt-get clean
-RUN pip install argparse
+RUN apt-get update && apt-get install -y \
+  gcc-4.4 \
+  gcc-4.4-multilib
 
-RUN wget http://openssl.org/source/openssl-1.0.2f.tar.gz
+RUN wget https://openssl.org/source/old/1.0.2/openssl-1.0.2f.tar.gz
 
-ENV POST_GIT_STEP tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh
+ENV POST_GIT_STEP tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh
 
 # Prepare ccache
 RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
@@ -81,6 +84,10 @@ RUN ln -s /usr/bin/ccache /usr/local/bin/c++
 RUN ln -s /usr/bin/ccache /usr/local/bin/clang
 RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
 
+#======================
+# Zookeeper dependencies
+# TODO(jtattermusch): is zookeeper still needed?
+RUN apt-get install -y libzookeeper-mt-dev
 
 RUN mkdir /var/local/jenkins
 
diff --git a/tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh b/tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh
similarity index 100%
rename from tools/dockerfile/test/cxx_squeeze_x64/post-git-setup.sh
rename to tools/dockerfile/test/cxx_wheezy_x64/post-git-setup.sh
diff --git a/tools/dockerfile/test/sanity/Dockerfile b/tools/dockerfile/test/sanity/Dockerfile
index 1935f675602bb743a0cc7908cbcb1bc4485ab790..4a69cd8c00ecdd836410c18ae851c10d01134400 100644
--- a/tools/dockerfile/test/sanity/Dockerfile
+++ b/tools/dockerfile/test/sanity/Dockerfile
@@ -65,7 +65,13 @@ RUN apt-get update && apt-get install -y time && apt-get clean
 
 #========================
 # Sanity test dependencies
-RUN apt-get update && apt-get install -y python-pip
+RUN apt-get update && apt-get install -y \
+      python-pip \
+      autoconf \
+      automake \
+      libtool \
+      curl \
+      python-virtualenv
 RUN pip install simplejson mako
 
 #===================
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index a06d4ecb4268bcc26fdd94553ff6b47ae75ef484..5044ed2c93498fefa9ae7dabe9bd84428d45d02f 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -774,10 +774,11 @@ include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/status.h \
 include/grpc/census.h \
 src/core/census/grpc_filter.h \
+src/core/census/grpc_plugin.h \
 src/core/channel/channel_args.h \
 src/core/channel/channel_stack.h \
+src/core/channel/channel_stack_builder.h \
 src/core/channel/client_channel.h \
-src/core/channel/client_uchannel.h \
 src/core/channel/compress_filter.h \
 src/core/channel/connected_channel.h \
 src/core/channel/context.h \
@@ -805,9 +806,9 @@ src/core/client_config/uri_parser.h \
 src/core/compression/algorithm_metadata.h \
 src/core/compression/message_compress.h \
 src/core/debug/trace.h \
-src/core/httpcli/format_request.h \
-src/core/httpcli/httpcli.h \
-src/core/httpcli/parser.h \
+src/core/http/format_request.h \
+src/core/http/httpcli.h \
+src/core/http/parser.h \
 src/core/iomgr/closure.h \
 src/core/iomgr/endpoint.h \
 src/core/iomgr/endpoint_pair.h \
@@ -839,6 +840,7 @@ src/core/iomgr/time_averaged_stats.h \
 src/core/iomgr/timer.h \
 src/core/iomgr/timer_heap.h \
 src/core/iomgr/udp_server.h \
+src/core/iomgr/unix_sockets_posix.h \
 src/core/iomgr/wakeup_fd_pipe.h \
 src/core/iomgr/wakeup_fd_posix.h \
 src/core/iomgr/workqueue.h \
@@ -855,9 +857,12 @@ src/core/surface/api_trace.h \
 src/core/surface/call.h \
 src/core/surface/call_test_only.h \
 src/core/surface/channel.h \
+src/core/surface/channel_init.h \
+src/core/surface/channel_stack_type.h \
 src/core/surface/completion_queue.h \
 src/core/surface/event_string.h \
 src/core/surface/init.h \
+src/core/surface/lame_client.h \
 src/core/surface/server.h \
 src/core/surface/surface_trace.h \
 src/core/transport/byte_stream.h \
@@ -911,10 +916,11 @@ third_party/nanopb/pb_decode.h \
 third_party/nanopb/pb_encode.h \
 src/core/census/grpc_context.c \
 src/core/census/grpc_filter.c \
+src/core/census/grpc_plugin.c \
 src/core/channel/channel_args.c \
 src/core/channel/channel_stack.c \
+src/core/channel/channel_stack_builder.c \
 src/core/channel/client_channel.c \
-src/core/channel/client_uchannel.c \
 src/core/channel/compress_filter.c \
 src/core/channel/connected_channel.c \
 src/core/channel/http_client_filter.c \
@@ -942,9 +948,9 @@ src/core/client_config/uri_parser.c \
 src/core/compression/compression_algorithm.c \
 src/core/compression/message_compress.c \
 src/core/debug/trace.c \
-src/core/httpcli/format_request.c \
-src/core/httpcli/httpcli.c \
-src/core/httpcli/parser.c \
+src/core/http/format_request.c \
+src/core/http/httpcli.c \
+src/core/http/parser.c \
 src/core/iomgr/closure.c \
 src/core/iomgr/endpoint.c \
 src/core/iomgr/endpoint_pair_posix.c \
@@ -979,6 +985,8 @@ src/core/iomgr/time_averaged_stats.c \
 src/core/iomgr/timer.c \
 src/core/iomgr/timer_heap.c \
 src/core/iomgr/udp_server.c \
+src/core/iomgr/unix_sockets_posix.c \
+src/core/iomgr/unix_sockets_posix_noop.c \
 src/core/iomgr/wakeup_fd_eventfd.c \
 src/core/iomgr/wakeup_fd_nospecial.c \
 src/core/iomgr/wakeup_fd_pipe.c \
@@ -1000,7 +1008,9 @@ src/core/surface/call_log_batch.c \
 src/core/surface/channel.c \
 src/core/surface/channel_connectivity.c \
 src/core/surface/channel_create.c \
+src/core/surface/channel_init.c \
 src/core/surface/channel_ping.c \
+src/core/surface/channel_stack_type.c \
 src/core/surface/completion_queue.c \
 src/core/surface/event_string.c \
 src/core/surface/init.c \
@@ -1008,7 +1018,6 @@ src/core/surface/lame_client.c \
 src/core/surface/metadata_array.c \
 src/core/surface/server.c \
 src/core/surface/server_chttp2.c \
-src/core/surface/server_create.c \
 src/core/surface/validate_metadata.c \
 src/core/surface/version.c \
 src/core/transport/byte_stream.c \
@@ -1039,7 +1048,7 @@ src/core/transport/metadata_batch.c \
 src/core/transport/static_metadata.c \
 src/core/transport/transport.c \
 src/core/transport/transport_op_string.c \
-src/core/httpcli/httpcli_security_connector.c \
+src/core/http/httpcli_security_connector.c \
 src/core/security/b64.c \
 src/core/security/client_auth_filter.c \
 src/core/security/credentials.c \
diff --git a/tools/openssl/use_openssl.sh b/tools/openssl/use_openssl.sh
index 3098217ec1b54a4cf2f677994fedcf03730b052d..9318b34257825138ccd8ad077b84995f5660efb9 100755
--- a/tools/openssl/use_openssl.sh
+++ b/tools/openssl/use_openssl.sh
@@ -38,8 +38,8 @@ CC=${CC:-cc}
 # allow openssl to be pre-downloaded
 if [ ! -e third_party/openssl-1.0.2f.tar.gz ]
 then
-  echo "Downloading http://openssl.org/source/openssl-1.0.2f.tar.gz to third_party/openssl-1.0.2f.tar.gz"
-  wget http://openssl.org/source/openssl-1.0.2f.tar.gz -O third_party/openssl-1.0.2f.tar.gz
+  echo "Downloading https://openssl.org/source/old/1.0.2/openssl-1.0.2f.tar.gz to third_party/openssl-1.0.2f.tar.gz"
+  wget https://openssl.org/source/old/1.0.2/openssl-1.0.2f.tar.gz -O third_party/openssl-1.0.2f.tar.gz
 fi
 
 # clean openssl directory
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index 99bf5df1f9234de1456d15c6f860d0da44b25f8e..dc11c0bd51deb738e5c1de02e62022f8ee92fc84 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -80,7 +80,7 @@ class Config(object):
     self.timeout_multiplier = timeout_multiplier
 
   def job_spec(self, cmdline, hash_targets, timeout_seconds=5*60,
-               shortname=None, environ={}, cpu_cost=1.0):
+               shortname=None, environ={}, cpu_cost=1.0, flaky=False):
     """Construct a jobset.JobSpec for a test under this config
 
        Args:
@@ -102,7 +102,7 @@ class Config(object):
                           timeout_seconds=(self.timeout_multiplier * timeout_seconds if timeout_seconds else None),
                           hash_targets=hash_targets
                               if self.allow_hashing else None,
-                          flake_retries=5 if args.allow_flakes else 0,
+                          flake_retries=5 if flaky or args.allow_flakes else 0,
                           timeout_retries=3 if args.allow_flakes else 0)
 
 
@@ -189,6 +189,7 @@ class CLanguage(object):
           out.append(self.config.job_spec(cmdline, [binary],
                                           shortname=' '.join(cmdline),
                                           cpu_cost=target['cpu_cost'],
+                                          flaky=target.get('flaky', False),
                                           environ={'GRPC_DEFAULT_SSL_ROOTS_FILE_PATH':
                                                    _ROOT + '/src/core/tsi/test_creds/ca.pem'}))
       elif self.args.regex == '.*' or self.platform == 'windows':
@@ -231,6 +232,9 @@ class CLanguage(object):
   def _clang_make_options(self):
     return ['CC=clang', 'CXX=clang++', 'LD=clang', 'LDXX=clang++']
 
+  def _gcc44_make_options(self):
+    return ['CC=gcc-4.4', 'CXX=g++-4.4', 'LD=gcc-4.4', 'LDXX=g++-4.4']
+
   def _compiler_options(self, use_docker, compiler):
     """Returns docker distro and make options to use for given compiler."""
     if _is_use_docker_child():
@@ -241,7 +245,7 @@ class CLanguage(object):
     if compiler == 'gcc4.9' or compiler == 'default':
       return ('jessie', [])
     elif compiler == 'gcc4.4':
-      return ('squeeze', [])
+      return ('wheezy', self._gcc44_make_options())
     elif compiler == 'gcc5.3':
       return ('ubuntu1604', [])
     elif compiler == 'clang3.4':
@@ -879,7 +883,7 @@ if args.use_docker:
       sys.exit(1)
   else:
     dockerfile_dir = next(iter(dockerfile_dirs))
-    
+
   child_argv = [ arg for arg in sys.argv if not arg == '--use_docker' ]
   run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
 
diff --git a/tools/run_tests/sanity/check_submodules.sh b/tools/run_tests/sanity/check_submodules.sh
index 3c6dbb9ea1f1a18f51b33c8d889c901496d12153..630e7fb3ae1d0ff7d815c584f3d43a26b77994e2 100755
--- a/tools/run_tests/sanity/check_submodules.sh
+++ b/tools/run_tests/sanity/check_submodules.sh
@@ -41,7 +41,7 @@ want_submodules=`mktemp /tmp/submXXXXXX`
 
 git submodule | awk '{ print $1 }' | sort > $submodules
 cat << EOF | awk '{ print $1 }' | sort > $want_submodules
- 9f897b25800d2f54f5c442ef01a60721aeca6d87 third_party/boringssl (version_for_cocoapods_1.0-67-g9f897b2)
+ 907ae62b9d81121cb86b604f83e6b811a43f7a87 third_party/boringssl (version_for_cocoapods_1.0-72-g907ae62)
  05b155ff59114735ec8cd089f669c4c3d8f59029 third_party/gflags (v2.1.0-45-g05b155f)
  c99458533a9b4c743ed51537e25989ea55944908 third_party/googletest (release-1.7.0)
  f8ac463766281625ad710900479130c7fcb4d63b third_party/nanopb (nanopb-0.3.4-29-gf8ac463)
diff --git a/tools/run_tests/sanity/sanity_tests.yaml b/tools/run_tests/sanity/sanity_tests.yaml
index 3840f4d8df6a3a54b7bef81008fba93290cb78f7..f155c8da45af540aacb470be561ab9d4df130911 100644
--- a/tools/run_tests/sanity/sanity_tests.yaml
+++ b/tools/run_tests/sanity/sanity_tests.yaml
@@ -8,3 +8,4 @@
 - script: tools/distrib/clang_format_code.sh
 - script: tools/distrib/check_trailing_newlines.sh
 - script: tools/distrib/check_nanopb_output.sh
+- script: tools/distrib/check_include_guards.py
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 503adba2fbf2ba2bd7ac33f987f4af5c12579eeb..06dc6d0ff8ac7b557ec68dd8e18056de951d2dd2 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -923,9 +923,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "httpcli_format_request_test", 
+    "name": "http_parser_test", 
     "src": [
-      "test/core/httpcli/format_request_test.c"
+      "test/core/http/parser_test.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -939,9 +939,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "httpcli_parser_test", 
+    "name": "httpcli_format_request_test", 
     "src": [
-      "test/core/httpcli/parser_test.c"
+      "test/core/http/format_request_test.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -957,7 +957,7 @@
     "language": "c", 
     "name": "httpcli_test", 
     "src": [
-      "test/core/httpcli/httpcli_test.c"
+      "test/core/http/httpcli_test.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -973,7 +973,7 @@
     "language": "c", 
     "name": "httpscli_test", 
     "src": [
-      "test/core/httpcli/httpscli_test.c"
+      "test/core/http/httpscli_test.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -2530,6 +2530,19 @@
     "third_party": true, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "boringssl", 
+      "boringssl_asn1_test_lib", 
+      "boringssl_test_util"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "boringssl_asn1_test", 
+    "src": [], 
+    "third_party": true, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "boringssl", 
@@ -3306,6 +3319,23 @@
     "third_party": false, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "end2end_tests", 
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "h2_full+trace_test", 
+    "src": [
+      "test/core/end2end/fixtures/h2_full+trace.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "end2end_tests", 
@@ -3442,23 +3472,6 @@
     "third_party": false, 
     "type": "target"
   }, 
-  {
-    "deps": [
-      "end2end_tests", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_test", 
-    "src": [
-      "test/core/end2end/fixtures/h2_uchannel.c"
-    ], 
-    "third_party": false, 
-    "type": "target"
-  }, 
   {
     "deps": [
       "end2end_tests", 
@@ -3605,9 +3618,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "src": [
-      "test/core/end2end/fixtures/h2_proxy.c"
+      "test/core/end2end/fixtures/h2_full+trace.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -3622,9 +3635,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "src": [
-      "test/core/end2end/fixtures/h2_sockpair.c"
+      "test/core/end2end/fixtures/h2_proxy.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -3639,9 +3652,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
     "src": [
-      "test/core/end2end/fixtures/h2_sockpair+trace.c"
+      "test/core/end2end/fixtures/h2_sockpair.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -3656,9 +3669,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "src": [
-      "test/core/end2end/fixtures/h2_sockpair_1byte.c"
+      "test/core/end2end/fixtures/h2_sockpair+trace.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -3673,9 +3686,9 @@
     ], 
     "headers": [], 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "src": [
-      "test/core/end2end/fixtures/h2_uchannel.c"
+      "test/core/end2end/fixtures/h2_sockpair_1byte.c"
     ], 
     "third_party": false, 
     "type": "target"
@@ -3913,12 +3926,13 @@
       "include/grpc/status.h", 
       "src/core/census/aggregation.h", 
       "src/core/census/grpc_filter.h", 
+      "src/core/census/grpc_plugin.h", 
       "src/core/census/mlog.h", 
       "src/core/census/rpc_metric_id.h", 
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.h", 
+      "src/core/channel/channel_stack_builder.h", 
       "src/core/channel/client_channel.h", 
-      "src/core/channel/client_uchannel.h", 
       "src/core/channel/compress_filter.h", 
       "src/core/channel/connected_channel.h", 
       "src/core/channel/context.h", 
@@ -3946,9 +3960,9 @@
       "src/core/compression/algorithm_metadata.h", 
       "src/core/compression/message_compress.h", 
       "src/core/debug/trace.h", 
-      "src/core/httpcli/format_request.h", 
-      "src/core/httpcli/httpcli.h", 
-      "src/core/httpcli/parser.h", 
+      "src/core/http/format_request.h", 
+      "src/core/http/httpcli.h", 
+      "src/core/http/parser.h", 
       "src/core/iomgr/closure.h", 
       "src/core/iomgr/endpoint.h", 
       "src/core/iomgr/endpoint_pair.h", 
@@ -3980,6 +3994,7 @@
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.h", 
       "src/core/iomgr/udp_server.h", 
+      "src/core/iomgr/unix_sockets_posix.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
       "src/core/iomgr/workqueue.h", 
@@ -4005,9 +4020,12 @@
       "src/core/surface/call.h", 
       "src/core/surface/call_test_only.h", 
       "src/core/surface/channel.h", 
+      "src/core/surface/channel_init.h", 
+      "src/core/surface/channel_stack_type.h", 
       "src/core/surface/completion_queue.h", 
       "src/core/surface/event_string.h", 
       "src/core/surface/init.h", 
+      "src/core/surface/lame_client.h", 
       "src/core/surface/server.h", 
       "src/core/surface/surface_trace.h", 
       "src/core/transport/byte_stream.h", 
@@ -4069,6 +4087,8 @@
       "src/core/census/grpc_context.c", 
       "src/core/census/grpc_filter.c", 
       "src/core/census/grpc_filter.h", 
+      "src/core/census/grpc_plugin.c", 
+      "src/core/census/grpc_plugin.h", 
       "src/core/census/initialize.c", 
       "src/core/census/mlog.c", 
       "src/core/census/mlog.h", 
@@ -4080,10 +4100,10 @@
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.c", 
       "src/core/channel/channel_stack.h", 
+      "src/core/channel/channel_stack_builder.c", 
+      "src/core/channel/channel_stack_builder.h", 
       "src/core/channel/client_channel.c", 
       "src/core/channel/client_channel.h", 
-      "src/core/channel/client_uchannel.c", 
-      "src/core/channel/client_uchannel.h", 
       "src/core/channel/compress_filter.c", 
       "src/core/channel/compress_filter.h", 
       "src/core/channel/connected_channel.c", 
@@ -4138,13 +4158,13 @@
       "src/core/compression/message_compress.h", 
       "src/core/debug/trace.c", 
       "src/core/debug/trace.h", 
-      "src/core/httpcli/format_request.c", 
-      "src/core/httpcli/format_request.h", 
-      "src/core/httpcli/httpcli.c", 
-      "src/core/httpcli/httpcli.h", 
-      "src/core/httpcli/httpcli_security_connector.c", 
-      "src/core/httpcli/parser.c", 
-      "src/core/httpcli/parser.h", 
+      "src/core/http/format_request.c", 
+      "src/core/http/format_request.h", 
+      "src/core/http/httpcli.c", 
+      "src/core/http/httpcli.h", 
+      "src/core/http/httpcli_security_connector.c", 
+      "src/core/http/parser.c", 
+      "src/core/http/parser.h", 
       "src/core/iomgr/closure.c", 
       "src/core/iomgr/closure.h", 
       "src/core/iomgr/endpoint.c", 
@@ -4210,6 +4230,9 @@
       "src/core/iomgr/timer_heap.h", 
       "src/core/iomgr/udp_server.c", 
       "src/core/iomgr/udp_server.h", 
+      "src/core/iomgr/unix_sockets_posix.c", 
+      "src/core/iomgr/unix_sockets_posix.h", 
+      "src/core/iomgr/unix_sockets_posix_noop.c", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
       "src/core/iomgr/wakeup_fd_nospecial.c", 
       "src/core/iomgr/wakeup_fd_pipe.c", 
@@ -4271,7 +4294,11 @@
       "src/core/surface/channel.h", 
       "src/core/surface/channel_connectivity.c", 
       "src/core/surface/channel_create.c", 
+      "src/core/surface/channel_init.c", 
+      "src/core/surface/channel_init.h", 
       "src/core/surface/channel_ping.c", 
+      "src/core/surface/channel_stack_type.c", 
+      "src/core/surface/channel_stack_type.h", 
       "src/core/surface/completion_queue.c", 
       "src/core/surface/completion_queue.h", 
       "src/core/surface/event_string.c", 
@@ -4280,12 +4307,12 @@
       "src/core/surface/init.h", 
       "src/core/surface/init_secure.c", 
       "src/core/surface/lame_client.c", 
+      "src/core/surface/lame_client.h", 
       "src/core/surface/metadata_array.c", 
       "src/core/surface/secure_channel_create.c", 
       "src/core/surface/server.c", 
       "src/core/surface/server.h", 
       "src/core/surface/server_chttp2.c", 
-      "src/core/surface/server_create.c", 
       "src/core/surface/surface_trace.h", 
       "src/core/surface/validate_metadata.c", 
       "src/core/surface/version.c", 
@@ -4435,6 +4462,7 @@
       "test/core/util/grpc_profiler.h", 
       "test/core/util/parse_hexstring.h", 
       "test/core/util/port.h", 
+      "test/core/util/port_server_client.h", 
       "test/core/util/slice_splitter.h"
     ], 
     "language": "c", 
@@ -4458,6 +4486,8 @@
       "test/core/util/parse_hexstring.h", 
       "test/core/util/port.h", 
       "test/core/util/port_posix.c", 
+      "test/core/util/port_server_client.c", 
+      "test/core/util/port_server_client.h", 
       "test/core/util/port_windows.c", 
       "test/core/util/slice_splitter.c", 
       "test/core/util/slice_splitter.h"
@@ -4478,6 +4508,7 @@
       "test/core/util/grpc_profiler.h", 
       "test/core/util/parse_hexstring.h", 
       "test/core/util/port.h", 
+      "test/core/util/port_server_client.h", 
       "test/core/util/slice_splitter.h"
     ], 
     "language": "c", 
@@ -4495,6 +4526,8 @@
       "test/core/util/parse_hexstring.h", 
       "test/core/util/port.h", 
       "test/core/util/port_posix.c", 
+      "test/core/util/port_server_client.c", 
+      "test/core/util/port_server_client.h", 
       "test/core/util/port_windows.c", 
       "test/core/util/slice_splitter.c", 
       "test/core/util/slice_splitter.h"
@@ -4521,12 +4554,13 @@
       "include/grpc/status.h", 
       "src/core/census/aggregation.h", 
       "src/core/census/grpc_filter.h", 
+      "src/core/census/grpc_plugin.h", 
       "src/core/census/mlog.h", 
       "src/core/census/rpc_metric_id.h", 
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.h", 
+      "src/core/channel/channel_stack_builder.h", 
       "src/core/channel/client_channel.h", 
-      "src/core/channel/client_uchannel.h", 
       "src/core/channel/compress_filter.h", 
       "src/core/channel/connected_channel.h", 
       "src/core/channel/context.h", 
@@ -4554,9 +4588,9 @@
       "src/core/compression/algorithm_metadata.h", 
       "src/core/compression/message_compress.h", 
       "src/core/debug/trace.h", 
-      "src/core/httpcli/format_request.h", 
-      "src/core/httpcli/httpcli.h", 
-      "src/core/httpcli/parser.h", 
+      "src/core/http/format_request.h", 
+      "src/core/http/httpcli.h", 
+      "src/core/http/parser.h", 
       "src/core/iomgr/closure.h", 
       "src/core/iomgr/endpoint.h", 
       "src/core/iomgr/endpoint_pair.h", 
@@ -4588,6 +4622,7 @@
       "src/core/iomgr/timer.h", 
       "src/core/iomgr/timer_heap.h", 
       "src/core/iomgr/udp_server.h", 
+      "src/core/iomgr/unix_sockets_posix.h", 
       "src/core/iomgr/wakeup_fd_pipe.h", 
       "src/core/iomgr/wakeup_fd_posix.h", 
       "src/core/iomgr/workqueue.h", 
@@ -4604,9 +4639,12 @@
       "src/core/surface/call.h", 
       "src/core/surface/call_test_only.h", 
       "src/core/surface/channel.h", 
+      "src/core/surface/channel_init.h", 
+      "src/core/surface/channel_stack_type.h", 
       "src/core/surface/completion_queue.h", 
       "src/core/surface/event_string.h", 
       "src/core/surface/init.h", 
+      "src/core/surface/lame_client.h", 
       "src/core/surface/server.h", 
       "src/core/surface/surface_trace.h", 
       "src/core/transport/byte_stream.h", 
@@ -4662,6 +4700,8 @@
       "src/core/census/grpc_context.c", 
       "src/core/census/grpc_filter.c", 
       "src/core/census/grpc_filter.h", 
+      "src/core/census/grpc_plugin.c", 
+      "src/core/census/grpc_plugin.h", 
       "src/core/census/initialize.c", 
       "src/core/census/mlog.c", 
       "src/core/census/mlog.h", 
@@ -4673,10 +4713,10 @@
       "src/core/channel/channel_args.h", 
       "src/core/channel/channel_stack.c", 
       "src/core/channel/channel_stack.h", 
+      "src/core/channel/channel_stack_builder.c", 
+      "src/core/channel/channel_stack_builder.h", 
       "src/core/channel/client_channel.c", 
       "src/core/channel/client_channel.h", 
-      "src/core/channel/client_uchannel.c", 
-      "src/core/channel/client_uchannel.h", 
       "src/core/channel/compress_filter.c", 
       "src/core/channel/compress_filter.h", 
       "src/core/channel/connected_channel.c", 
@@ -4731,12 +4771,12 @@
       "src/core/compression/message_compress.h", 
       "src/core/debug/trace.c", 
       "src/core/debug/trace.h", 
-      "src/core/httpcli/format_request.c", 
-      "src/core/httpcli/format_request.h", 
-      "src/core/httpcli/httpcli.c", 
-      "src/core/httpcli/httpcli.h", 
-      "src/core/httpcli/parser.c", 
-      "src/core/httpcli/parser.h", 
+      "src/core/http/format_request.c", 
+      "src/core/http/format_request.h", 
+      "src/core/http/httpcli.c", 
+      "src/core/http/httpcli.h", 
+      "src/core/http/parser.c", 
+      "src/core/http/parser.h", 
       "src/core/iomgr/closure.c", 
       "src/core/iomgr/closure.h", 
       "src/core/iomgr/endpoint.c", 
@@ -4802,6 +4842,9 @@
       "src/core/iomgr/timer_heap.h", 
       "src/core/iomgr/udp_server.c", 
       "src/core/iomgr/udp_server.h", 
+      "src/core/iomgr/unix_sockets_posix.c", 
+      "src/core/iomgr/unix_sockets_posix.h", 
+      "src/core/iomgr/unix_sockets_posix_noop.c", 
       "src/core/iomgr/wakeup_fd_eventfd.c", 
       "src/core/iomgr/wakeup_fd_nospecial.c", 
       "src/core/iomgr/wakeup_fd_pipe.c", 
@@ -4839,7 +4882,11 @@
       "src/core/surface/channel.h", 
       "src/core/surface/channel_connectivity.c", 
       "src/core/surface/channel_create.c", 
+      "src/core/surface/channel_init.c", 
+      "src/core/surface/channel_init.h", 
       "src/core/surface/channel_ping.c", 
+      "src/core/surface/channel_stack_type.c", 
+      "src/core/surface/channel_stack_type.h", 
       "src/core/surface/completion_queue.c", 
       "src/core/surface/completion_queue.h", 
       "src/core/surface/event_string.c", 
@@ -4848,11 +4895,11 @@
       "src/core/surface/init.h", 
       "src/core/surface/init_unsecure.c", 
       "src/core/surface/lame_client.c", 
+      "src/core/surface/lame_client.h", 
       "src/core/surface/metadata_array.c", 
       "src/core/surface/server.c", 
       "src/core/surface/server.h", 
       "src/core/surface/server_chttp2.c", 
-      "src/core/surface/server_create.c", 
       "src/core/surface/surface_trace.h", 
       "src/core/surface/validate_metadata.c", 
       "src/core/surface/version.c", 
@@ -5945,6 +5992,18 @@
     "third_party": true, 
     "type": "lib"
   }, 
+  {
+    "deps": [
+      "boringssl", 
+      "boringssl_test_util"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "boringssl_asn1_test_lib", 
+    "src": [], 
+    "third_party": true, 
+    "type": "lib"
+  }, 
   {
     "deps": [
       "boringssl", 
diff --git a/tools/run_tests/stress_test/README.md b/tools/run_tests/stress_test/README.md
index 80e4cd58f0a469af0255d906c07a04a5ad6a1c5f..1a48e90c69e43d897135919d5a42035b35d234c8 100644
--- a/tools/run_tests/stress_test/README.md
+++ b/tools/run_tests/stress_test/README.md
@@ -30,6 +30,27 @@
 3. Install Google Cloud SDK. Instructions [here](https://cloud.google.com/sdk/). This installs the `gcloud` tool
 4. Install `kubectl`, Kubernetes command line tool using `gcloud`. i.e
     - `$ gcloud components update kubectl`
+    - NOTE: If you are running this from a GCE instance, the command may fail with the following error:
+    ```
+     You cannot perform this action because this Cloud SDK installation is 
+     managed by an external package manager. If you would like to get the
+     latest version, please see our main download page at:
+
+     https://developers.google.com/cloud/sdk/
+
+     ERROR: (gcloud.components.update) The component manager is disabled for this installation
+    ```
+    -- If so, you will have to manually install Cloud SDK by doing the following
+    ```shell
+      $ # The following installs latest Cloud SDK and updates the PATH
+      $ # (Accept the default values when prompted)
+      $ curl https://sdk.cloud.google.com | bash
+      $ exec -l $SHELL
+      $ # Set the defaults. Pick the default GCE credentials when prompted (The service account
+      $ # name will have a name similar to: "xxx-compute@developer.gserviceaccount.com")
+      $ gcloud init
+    ``` 
+
 5. Install Google python client apis:
     - `‘$ sudo pip install --upgrade google-api-python-client’`
     -  **Note**: Do `$ sudo apt-get install python-pip` (or `$ easy_install -U pip`) if you do not have pip
diff --git a/tools/run_tests/stress_test/STRESS_CLIENT_SPEC.md b/tools/run_tests/stress_test/STRESS_CLIENT_SPEC.md
new file mode 100644
index 0000000000000000000000000000000000000000..c4c9f145137d7dec8da74ffcad7e1a9460fd9d4b
--- /dev/null
+++ b/tools/run_tests/stress_test/STRESS_CLIENT_SPEC.md
@@ -0,0 +1,25 @@
+Stress Test client Specification
+=========================
+This document specifies the features a stress test client should implement in order to work with the stress testing framework. The stress test clients are executed against the existing interop test servers.
+
+**Requirements**
+--------------
+**1.** A stress test client should be able to repeatedly execute one or more of the existing 'interop test cases'. It may just be a wrapper around the existing interop test client. The exact command line arguments the client should support are listed in _Table 1_ below.
+
+**2.** The stress test client must implement a metrics server defined by _[metrics.proto](https://github.com/grpc/grpc/blob/master/src/proto/grpc/testing/metrics.proto)_ and must expose _qps_ as a long-valued Gauge. The client can track the overall _qps_ in one Gauge or in multiple Gagues (for example: One per Channel or Stub). 
+ The framework periodically queries the _qps_ by calling the `GetAllGauges()` method (the framework assumes that all the returned Gauges are _qps_ Gauges) and uses this to determine if the stress test client is running or crashed or stalled.
+> *Note:* In this context, the term  _**qps**_  means _interop test cases per second_  (not _messages per second_ or _rpc calls per second_)
+
+
+**Table 1:** Command line arguments that should be supported by the stress test client.
+
+>_**Note** The current C++ [stress client](https://github.com/grpc/grpc/blob/master/test/cpp/interop/stress_test.cc) supports more flags than those listed here but those flags will soon be deprecated_|
+
+Parameter             |                    Description
+----------------------|---------------------------------
+`--server_address`    | The stress client should accept a list of server addresses in the following format:<br> ```<name_1>:<port_1>,<name_2>:<port_2>..<name_N>:<port_N>``` <br> _Note:_ `<name>` can be either server name or IP address.<br><br>_Type:_ string <br>_default:_ ```localhost:8080``` <br>_Example:_ ``foo.foobar.com:8080,bar.foobar.com:8080`` <br><br> Currently, the stress test framework only passes one server address to the client.
+`--test_cases`        |   List of test cases along with the relative weights in the following format:<br> `<testcase_1:w_1>,<testcase_2:w_2>...<testcase_n:w_n>`. <br> The test cases names are the same as those currently used by the interop clients<br><br>_Type:_ string <br>_Example:_ `empty_unary:20,large_unary:10,empty_stream:70` <br>(The stress client would then make `empty_unary` calls 20% of the time, `large_unary` calls 10% of the time and `empty_stream` calls 70% of the time.) <br>_Note:_ The weights need not add up to 100.
+`--test_duration-secs`      | The test duration in seconds. A value of -1 means that the test should run forever until forcefully terminated. <br>_Type:_ int <br>_default:_ -1
+`--num_channels_per_server` | Number of channels (i.e connections) to each server. <br> _Type:_ int <br> _default:_ 1 <br><br> _Note:_ Unfortunately, the term `channel` is used differently in `grpc-java` and `C based grpc`. In this context, this really means "number of connections to the server"
+`--num_stubs_per_channel `  | Number of client stubs per each connection to server.<br>_Type:_ int <br>_default:_ 1
+`--metrics_port`            | The port at which the stress client exposes [QPS metrics](https://github.com/grpc/grpc/blob/master/src/proto/grpc/testing/metrics.proto). <br>_Type:_ int <br>_default:_ 8081
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 784dfd865bd8d4adec6486c4e98f445e5316dfbd..5f72b8c5828c50937359a3079a5479fb858a2221 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -1094,7 +1094,7 @@
     "flaky": false, 
     "gtest": false, 
     "language": "c", 
-    "name": "httpcli_format_request_test", 
+    "name": "http_parser_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -1115,7 +1115,7 @@
     "flaky": false, 
     "gtest": false, 
     "language": "c", 
-    "name": "httpcli_parser_test", 
+    "name": "httpcli_format_request_test", 
     "platforms": [
       "linux", 
       "mac", 
@@ -1293,7 +1293,7 @@
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
-    "flaky": false, 
+    "flaky": true, 
     "gtest": false, 
     "language": "c", 
     "name": "lb_policies_test", 
@@ -1335,7 +1335,7 @@
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
-    "flaky": false, 
+    "flaky": true, 
     "gtest": false, 
     "language": "c", 
     "name": "mlog_test", 
@@ -2777,6 +2777,30 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "asan"
+    ], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "boringssl_asn1_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
   {
     "args": [], 
     "boringssl": true, 
@@ -9118,13 +9142,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9139,13 +9164,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9160,13 +9186,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9181,13 +9208,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9202,13 +9230,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9223,13 +9252,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9244,13 +9274,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9265,13 +9296,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9286,13 +9318,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9307,13 +9340,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9328,13 +9362,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9349,13 +9384,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9370,13 +9406,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9391,13 +9428,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9412,13 +9450,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9431,36 +9470,16 @@
       "high_initial_seqno"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_oauth2_test", 
-    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "hpack_size"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9475,13 +9494,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9496,13 +9516,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9517,13 +9538,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9538,13 +9560,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9559,13 +9582,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9580,13 +9604,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9601,13 +9626,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9622,13 +9648,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9643,13 +9670,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9664,13 +9692,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9685,13 +9714,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9706,13 +9736,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9727,13 +9758,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9748,13 +9780,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9769,13 +9802,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9790,13 +9824,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9811,13 +9846,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9832,13 +9868,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9853,13 +9890,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_oauth2_test", 
+    "name": "h2_full+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9880,7 +9918,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9901,7 +9939,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9922,7 +9960,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9943,7 +9981,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9964,7 +10002,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -9985,7 +10023,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10006,7 +10044,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10027,7 +10065,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10048,7 +10086,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10058,18 +10096,18 @@
   }, 
   {
     "args": [
-      "default_host"
+      "compressed_payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10079,18 +10117,18 @@
   }, 
   {
     "args": [
-      "disappearing_server"
+      "connectivity"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10100,7 +10138,7 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "default_host"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10111,7 +10149,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10121,18 +10159,18 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "disappearing_server"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10142,7 +10180,7 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10153,7 +10191,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10163,18 +10201,18 @@
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10184,7 +10222,7 @@
   }, 
   {
     "args": [
-      "large_metadata"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10195,7 +10233,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10205,18 +10243,18 @@
   }, 
   {
     "args": [
-      "max_message_length"
+      "hpack_size"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10226,7 +10264,7 @@
   }, 
   {
     "args": [
-      "negative_deadline"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10237,7 +10275,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10247,7 +10285,7 @@
   }, 
   {
     "args": [
-      "no_op"
+      "large_metadata"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10258,7 +10296,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10268,18 +10306,18 @@
   }, 
   {
     "args": [
-      "payload"
+      "max_concurrent_streams"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10289,18 +10327,18 @@
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "max_message_length"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10310,7 +10348,7 @@
   }, 
   {
     "args": [
-      "registered_call"
+      "negative_deadline"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10321,7 +10359,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10331,7 +10369,7 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "no_op"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10342,7 +10380,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10352,18 +10390,18 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10373,7 +10411,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "ping"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10384,7 +10422,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10394,7 +10432,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_tags"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10405,7 +10443,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10415,18 +10453,18 @@
   }, 
   {
     "args": [
-      "simple_delayed_request"
+      "registered_call"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10436,7 +10474,7 @@
   }, 
   {
     "args": [
-      "simple_metadata"
+      "request_with_flags"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10447,7 +10485,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10457,7 +10495,7 @@
   }, 
   {
     "args": [
-      "simple_request"
+      "request_with_payload"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10468,7 +10506,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10478,7 +10516,7 @@
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10489,7 +10527,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10499,7 +10537,7 @@
   }, 
   {
     "args": [
-      "bad_hostname"
+      "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10510,7 +10548,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10520,7 +10558,7 @@
   }, 
   {
     "args": [
-      "binary_metadata"
+      "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10531,7 +10569,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10541,18 +10579,18 @@
   }, 
   {
     "args": [
-      "call_creds"
+      "simple_delayed_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10562,18 +10600,18 @@
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "simple_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10583,18 +10621,18 @@
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "simple_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10604,18 +10642,18 @@
   }, 
   {
     "args": [
-      "cancel_after_invoke"
+      "trailing_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_oauth2_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10625,18 +10663,18 @@
   }, 
   {
     "args": [
-      "cancel_before_invoke"
+      "bad_hostname"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10646,18 +10684,18 @@
   }, 
   {
     "args": [
-      "cancel_in_a_vacuum"
+      "binary_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10667,18 +10705,18 @@
   }, 
   {
     "args": [
-      "cancel_with_status"
+      "call_creds"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10688,7 +10726,7 @@
   }, 
   {
     "args": [
-      "compressed_payload"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10699,7 +10737,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10709,18 +10747,18 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "cancel_after_client_done"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10730,7 +10768,7 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "cancel_after_invoke"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10741,7 +10779,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10751,18 +10789,18 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "cancel_before_invoke"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10772,18 +10810,18 @@
   }, 
   {
     "args": [
-      "hpack_size"
+      "cancel_in_a_vacuum"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10793,18 +10831,18 @@
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "cancel_with_status"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10814,7 +10852,7 @@
   }, 
   {
     "args": [
-      "large_metadata"
+      "default_host"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10825,7 +10863,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10835,7 +10873,7 @@
   }, 
   {
     "args": [
-      "max_concurrent_streams"
+      "disappearing_server"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10846,7 +10884,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10856,18 +10894,18 @@
   }, 
   {
     "args": [
-      "max_message_length"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10877,18 +10915,18 @@
   }, 
   {
     "args": [
-      "negative_deadline"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10898,7 +10936,7 @@
   }, 
   {
     "args": [
-      "no_op"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10909,7 +10947,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10919,18 +10957,18 @@
   }, 
   {
     "args": [
-      "payload"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10940,7 +10978,7 @@
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "large_metadata"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10951,7 +10989,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10961,18 +10999,18 @@
   }, 
   {
     "args": [
-      "registered_call"
+      "max_message_length"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -10982,7 +11020,7 @@
   }, 
   {
     "args": [
-      "request_with_flags"
+      "negative_deadline"
     ], 
     "ci_platforms": [
       "windows", 
@@ -10993,7 +11031,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11003,7 +11041,7 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "no_op"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11014,7 +11052,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11024,18 +11062,18 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11045,7 +11083,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11056,7 +11094,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11066,7 +11104,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_tags"
+      "registered_call"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11077,7 +11115,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11087,7 +11125,7 @@
   }, 
   {
     "args": [
-      "simple_metadata"
+      "request_with_payload"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11098,7 +11136,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11108,7 +11146,7 @@
   }, 
   {
     "args": [
-      "simple_request"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11119,7 +11157,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11129,7 +11167,7 @@
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
       "windows", 
@@ -11140,7 +11178,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11150,19 +11188,18 @@
   }, 
   {
     "args": [
-      "bad_hostname"
+      "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11172,19 +11209,18 @@
   }, 
   {
     "args": [
-      "binary_metadata"
+      "simple_delayed_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11194,19 +11230,18 @@
   }, 
   {
     "args": [
-      "call_creds"
+      "simple_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11216,19 +11251,18 @@
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "simple_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11238,19 +11272,18 @@
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "trailing_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11260,19 +11293,18 @@
   }, 
   {
     "args": [
-      "cancel_after_invoke"
+      "bad_hostname"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11282,19 +11314,18 @@
   }, 
   {
     "args": [
-      "cancel_before_invoke"
+      "binary_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11304,19 +11335,18 @@
   }, 
   {
     "args": [
-      "cancel_in_a_vacuum"
+      "call_creds"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11326,19 +11356,18 @@
   }, 
   {
     "args": [
-      "cancel_with_status"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11348,19 +11377,18 @@
   }, 
   {
     "args": [
-      "compressed_payload"
+      "cancel_after_client_done"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11370,19 +11398,18 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "cancel_after_invoke"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11392,19 +11419,18 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "cancel_before_invoke"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11414,19 +11440,18 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "cancel_in_a_vacuum"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11436,19 +11461,18 @@
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "cancel_with_status"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11458,19 +11482,18 @@
   }, 
   {
     "args": [
-      "large_metadata"
+      "compressed_payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11480,19 +11503,18 @@
   }, 
   {
     "args": [
-      "max_concurrent_streams"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11502,19 +11524,18 @@
   }, 
   {
     "args": [
-      "max_message_length"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11524,19 +11545,18 @@
   }, 
   {
     "args": [
-      "negative_deadline"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11546,19 +11566,18 @@
   }, 
   {
     "args": [
-      "no_op"
+      "hpack_size"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11568,19 +11587,18 @@
   }, 
   {
     "args": [
-      "payload"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11590,19 +11608,39 @@
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "large_metadata"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_concurrent_streams"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11612,19 +11650,39 @@
   }, 
   {
     "args": [
-      "registered_call"
+      "max_message_length"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "negative_deadline"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11634,19 +11692,60 @@
   }, 
   {
     "args": [
-      "request_with_flags"
+      "no_op"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "payload"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "ping_pong_streaming"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11656,19 +11755,39 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "registered_call"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_flags"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11678,19 +11797,39 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "request_with_payload"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "server_finishes_request"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11705,14 +11844,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11727,14 +11865,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11749,14 +11886,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11771,14 +11907,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11793,14 +11928,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_test", 
+    "name": "h2_sockpair_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11821,7 +11955,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11842,7 +11976,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11863,7 +11997,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11884,7 +12018,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11905,7 +12039,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11926,7 +12060,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11947,7 +12081,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11968,7 +12102,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -11989,7 +12123,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12010,7 +12144,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12031,7 +12165,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12052,7 +12186,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12073,28 +12207,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "hpack_size"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12115,7 +12228,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12136,7 +12249,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12157,7 +12270,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12178,7 +12291,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12199,7 +12312,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12220,7 +12333,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12241,7 +12354,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12262,7 +12375,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12283,7 +12396,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12304,7 +12417,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12325,7 +12438,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12346,7 +12459,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12367,7 +12480,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12388,7 +12501,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12409,7 +12522,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12430,7 +12543,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12451,7 +12564,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_test", 
+    "name": "h2_sockpair+trace_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12466,14 +12579,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12488,14 +12600,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12510,14 +12621,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12532,14 +12642,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12554,14 +12663,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12576,14 +12684,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12598,14 +12705,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12620,14 +12726,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12642,14 +12747,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12664,14 +12768,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12681,19 +12784,18 @@
   }, 
   {
     "args": [
-      "connectivity"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12703,19 +12805,18 @@
   }, 
   {
     "args": [
-      "default_host"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12725,19 +12826,18 @@
   }, 
   {
     "args": [
-      "disappearing_server"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12747,19 +12847,18 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "hpack_size"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12769,19 +12868,18 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12791,19 +12889,18 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "large_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12813,19 +12910,18 @@
   }, 
   {
     "args": [
-      "hpack_size"
+      "max_concurrent_streams"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12835,19 +12931,18 @@
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "max_message_length"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12857,19 +12952,18 @@
   }, 
   {
     "args": [
-      "large_metadata"
+      "negative_deadline"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12879,19 +12973,18 @@
   }, 
   {
     "args": [
-      "max_concurrent_streams"
+      "no_op"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12901,19 +12994,18 @@
   }, 
   {
     "args": [
-      "max_message_length"
+      "payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12923,19 +13015,18 @@
   }, 
   {
     "args": [
-      "negative_deadline"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12945,19 +13036,18 @@
   }, 
   {
     "args": [
-      "no_op"
+      "registered_call"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12967,19 +13057,18 @@
   }, 
   {
     "args": [
-      "payload"
+      "request_with_flags"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -12989,19 +13078,18 @@
   }, 
   {
     "args": [
-      "ping"
+      "request_with_payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13011,19 +13099,18 @@
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13033,19 +13120,18 @@
   }, 
   {
     "args": [
-      "registered_call"
+      "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13055,19 +13141,18 @@
   }, 
   {
     "args": [
-      "request_with_flags"
+      "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13077,19 +13162,18 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "simple_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13099,19 +13183,18 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "simple_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13121,19 +13204,18 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "trailing_metadata"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_test", 
+    "name": "h2_sockpair_1byte_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -13143,7 +13225,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_tags"
+      "bad_hostname"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13165,7 +13247,7 @@
   }, 
   {
     "args": [
-      "simple_delayed_request"
+      "binary_metadata"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13173,7 +13255,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13187,7 +13269,7 @@
   }, 
   {
     "args": [
-      "simple_metadata"
+      "call_creds"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13209,7 +13291,7 @@
   }, 
   {
     "args": [
-      "simple_request"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13217,7 +13299,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13231,7 +13313,7 @@
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "cancel_after_client_done"
     ], 
     "ci_platforms": [
       "windows", 
@@ -13239,7 +13321,7 @@
       "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13253,487 +13335,689 @@
   }, 
   {
     "args": [
-      "bad_hostname"
+      "cancel_after_invoke"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "binary_metadata"
+      "cancel_before_invoke"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "call_creds"
+      "cancel_in_a_vacuum"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "cancel_with_status"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "compressed_payload"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_after_invoke"
+      "connectivity"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_before_invoke"
+      "default_host"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_in_a_vacuum"
+      "disappearing_server"
     ], 
     "ci_platforms": [
-      "linux"
-    ], 
-    "cpu_cost": 0.1, 
-    "exclude_configs": [], 
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "cancel_with_status"
+      "empty_batch"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "compressed_payload"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "connectivity"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "default_host"
+      "hpack_size"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "disappearing_server"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "empty_batch"
+      "large_metadata"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "max_concurrent_streams"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_ssl_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_message_length"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "negative_deadline"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "hpack_size"
+      "no_op"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "payload"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "large_metadata"
+      "ping"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "max_concurrent_streams"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "max_message_length"
+      "registered_call"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "negative_deadline"
+      "request_with_flags"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "no_op"
+      "request_with_payload"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "payload"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "ping"
+      "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "registered_call"
+      "simple_delayed_request"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "request_with_flags"
+      "simple_metadata"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "request_with_payload"
+      "simple_request"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "trailing_metadata"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl+poll_test", 
+    "name": "h2_ssl_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "bad_hostname"
     ], 
     "ci_platforms": [
       "linux"
@@ -13749,7 +14033,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_tags"
+      "binary_metadata"
     ], 
     "ci_platforms": [
       "linux"
@@ -13765,12 +14049,12 @@
   }, 
   {
     "args": [
-      "simple_delayed_request"
+      "call_creds"
     ], 
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13781,12 +14065,12 @@
   }, 
   {
     "args": [
-      "simple_metadata"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13797,12 +14081,12 @@
   }, 
   {
     "args": [
-      "simple_request"
+      "cancel_after_client_done"
     ], 
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13813,12 +14097,12 @@
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "cancel_after_invoke"
     ], 
     "ci_platforms": [
       "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
@@ -13829,464 +14113,354 @@
   }, 
   {
     "args": [
-      "bad_hostname"
+      "cancel_before_invoke"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "binary_metadata"
+      "cancel_in_a_vacuum"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+    "name": "h2_ssl+poll_test", 
+    "platforms": [
+      "linux"
     ]
   }, 
   {
     "args": [
-      "call_creds"
+      "cancel_with_status"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "compressed_payload"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "connectivity"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_after_invoke"
+      "default_host"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_before_invoke"
+      "disappearing_server"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_in_a_vacuum"
+      "empty_batch"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "cancel_with_status"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "default_host"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "disappearing_server"
+      "hpack_size"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "empty_batch"
+      "invoke_large_request"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "large_metadata"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "max_concurrent_streams"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "invoke_large_request"
+      "max_message_length"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "large_metadata"
+      "negative_deadline"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "max_message_length"
+      "no_op"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "negative_deadline"
+      "payload"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "no_op"
+      "ping"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "payload"
+      "ping_pong_streaming"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "ping_pong_streaming"
+      "registered_call"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
     "args": [
-      "registered_call"
+      "request_with_flags"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14294,20 +14468,15 @@
       "request_with_payload"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14315,20 +14484,15 @@
       "server_finishes_request"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14336,20 +14500,15 @@
       "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14357,20 +14516,15 @@
       "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14378,20 +14532,15 @@
       "simple_delayed_request"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14399,20 +14548,15 @@
       "simple_metadata"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14420,20 +14564,15 @@
       "simple_request"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14441,20 +14580,15 @@
       "trailing_metadata"
     ], 
     "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
+      "linux"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_ssl_proxy_test", 
+    "name": "h2_ssl+poll_test", 
     "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
+      "linux"
     ]
   }, 
   {
@@ -14464,14 +14598,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14486,14 +14619,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14508,14 +14640,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14530,14 +14661,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14552,14 +14682,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14574,14 +14703,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14596,14 +14724,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14618,14 +14745,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14640,14 +14766,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14657,19 +14782,18 @@
   }, 
   {
     "args": [
-      "compressed_payload"
+      "default_host"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14679,19 +14803,18 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "disappearing_server"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14701,19 +14824,18 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14723,19 +14845,18 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14745,19 +14866,18 @@
   }, 
   {
     "args": [
-      "hpack_size"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14772,14 +14892,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14794,36 +14913,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "max_concurrent_streams"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14838,14 +14934,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14860,14 +14955,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14882,14 +14976,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14904,14 +14997,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14926,14 +15018,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14948,14 +15039,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14965,19 +15055,18 @@
   }, 
   {
     "args": [
-      "request_with_flags"
+      "request_with_payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -14987,19 +15076,18 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15009,19 +15097,18 @@
   }, 
   {
     "args": [
-      "server_finishes_request"
+      "shutdown_finishes_calls"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15031,19 +15118,18 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "shutdown_finishes_tags"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15053,19 +15139,18 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_tags"
+      "simple_delayed_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15080,14 +15165,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15102,14 +15186,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -15124,14 +15207,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_test", 
+    "name": "h2_ssl_proxy_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20368,41 +20450,86 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_full+poll+pipe_nosec_test", 
+    "name": "h2_full+poll+pipe_nosec_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
+  {
+    "args": [
+      "trailing_metadata"
+    ], 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+poll+pipe_nosec_test", 
+    "platforms": [
+      "linux"
+    ]
+  }, 
+  {
+    "args": [
+      "bad_hostname"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "trailing_metadata"
+      "binary_metadata"
     ], 
     "ci_platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_full+poll+pipe_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
-      "linux"
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
     ]
   }, 
   {
     "args": [
-      "bad_hostname"
+      "cancel_after_accept"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20412,18 +20539,19 @@
   }, 
   {
     "args": [
-      "binary_metadata"
+      "cancel_after_client_done"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20433,18 +20561,19 @@
   }, 
   {
     "args": [
-      "cancel_after_accept"
+      "cancel_after_invoke"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20454,18 +20583,19 @@
   }, 
   {
     "args": [
-      "cancel_after_client_done"
+      "cancel_before_invoke"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20475,18 +20605,19 @@
   }, 
   {
     "args": [
-      "cancel_after_invoke"
+      "cancel_in_a_vacuum"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20496,18 +20627,19 @@
   }, 
   {
     "args": [
-      "cancel_before_invoke"
+      "cancel_with_status"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20517,18 +20649,19 @@
   }, 
   {
     "args": [
-      "cancel_in_a_vacuum"
+      "compressed_payload"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20538,18 +20671,19 @@
   }, 
   {
     "args": [
-      "cancel_with_status"
+      "connectivity"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20564,13 +20698,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20585,13 +20720,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20606,13 +20742,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20627,13 +20764,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20648,13 +20786,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20669,13 +20808,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20690,13 +20830,36 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "max_concurrent_streams"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20711,13 +20874,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20732,13 +20896,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20753,13 +20918,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20774,13 +20940,36 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "ping"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20795,13 +20984,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20816,13 +21006,36 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
+    "platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "request_with_flags"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20837,13 +21050,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20858,13 +21072,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20879,13 +21094,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20900,13 +21116,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20921,13 +21138,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20942,13 +21160,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20963,13 +21182,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -20984,13 +21204,14 @@
     "ci_platforms": [
       "windows", 
       "linux", 
+      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_proxy_nosec_test", 
+    "name": "h2_full+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21011,7 +21232,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21032,7 +21253,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21053,7 +21274,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21074,7 +21295,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21095,7 +21316,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21116,7 +21337,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21137,7 +21358,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21158,7 +21379,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21168,18 +21389,18 @@
   }, 
   {
     "args": [
-      "compressed_payload"
+      "default_host"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21189,7 +21410,7 @@
   }, 
   {
     "args": [
-      "empty_batch"
+      "disappearing_server"
     ], 
     "ci_platforms": [
       "windows", 
@@ -21200,7 +21421,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21210,18 +21431,18 @@
   }, 
   {
     "args": [
-      "graceful_server_shutdown"
+      "empty_batch"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 0.1, 
+    "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21231,18 +21452,18 @@
   }, 
   {
     "args": [
-      "high_initial_seqno"
+      "graceful_server_shutdown"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21252,7 +21473,7 @@
   }, 
   {
     "args": [
-      "hpack_size"
+      "high_initial_seqno"
     ], 
     "ci_platforms": [
       "windows", 
@@ -21263,7 +21484,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21284,7 +21505,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21305,28 +21526,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
-    "platforms": [
-      "windows", 
-      "linux", 
-      "mac", 
-      "posix"
-    ]
-  }, 
-  {
-    "args": [
-      "max_concurrent_streams"
-    ], 
-    "ci_platforms": [
-      "windows", 
-      "linux", 
-      "posix"
-    ], 
-    "cpu_cost": 1.0, 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21347,7 +21547,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21368,7 +21568,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21389,7 +21589,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
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       "linux", 
@@ -21410,7 +21610,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
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       "linux", 
@@ -21431,7 +21631,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
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       "linux", 
@@ -21452,7 +21652,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21462,7 +21662,7 @@
   }, 
   {
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-      "request_with_flags"
+      "request_with_payload"
     ], 
     "ci_platforms": [
       "windows", 
@@ -21473,7 +21673,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21483,7 +21683,7 @@
   }, 
   {
     "args": [
-      "request_with_payload"
+      "server_finishes_request"
     ], 
     "ci_platforms": [
       "windows", 
@@ -21494,7 +21694,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21504,7 +21704,7 @@
   }, 
   {
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-      "server_finishes_request"
+      "shutdown_finishes_calls"
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     "ci_platforms": [
       "windows", 
@@ -21515,7 +21715,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21525,7 +21725,7 @@
   }, 
   {
     "args": [
-      "shutdown_finishes_calls"
+      "shutdown_finishes_tags"
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     "ci_platforms": [
       "windows", 
@@ -21536,7 +21736,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21546,18 +21746,18 @@
   }, 
   {
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-      "shutdown_finishes_tags"
+      "simple_delayed_request"
     ], 
     "ci_platforms": [
       "windows", 
       "linux", 
       "posix"
     ], 
-    "cpu_cost": 1.0, 
+    "cpu_cost": 0.1, 
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     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
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       "linux", 
@@ -21578,7 +21778,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
     "platforms": [
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       "linux", 
@@ -21599,7 +21799,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
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       "linux", 
@@ -21620,7 +21820,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_nosec_test", 
+    "name": "h2_proxy_nosec_test", 
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@@ -21635,14 +21835,13 @@
     "ci_platforms": [
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21657,14 +21856,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21679,14 +21877,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21701,14 +21898,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21723,14 +21919,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21745,14 +21940,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21767,14 +21961,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21789,14 +21982,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21811,14 +22003,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21833,14 +22024,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21855,14 +22045,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -21875,16 +22064,36 @@
       "high_initial_seqno"
     ], 
     "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c", 
+    "name": "h2_sockpair_nosec_test", 
+    "platforms": [
       "windows", 
       "linux", 
       "mac", 
       "posix"
+    ]
+  }, 
+  {
+    "args": [
+      "hpack_size"
+    ], 
+    "ci_platforms": [
+      "windows", 
+      "linux", 
+      "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21899,14 +22108,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21921,14 +22129,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21943,14 +22150,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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       "linux", 
@@ -21965,14 +22171,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -21987,14 +22192,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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       "linux", 
@@ -22009,14 +22213,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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       "linux", 
@@ -22031,14 +22234,13 @@
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     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
     "platforms": [
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       "linux", 
@@ -22053,14 +22255,13 @@
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     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
     "platforms": [
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       "linux", 
@@ -22075,14 +22276,13 @@
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       "linux", 
-      "mac", 
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
     "platforms": [
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@@ -22097,14 +22297,13 @@
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     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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       "linux", 
@@ -22119,14 +22318,13 @@
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     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22141,14 +22339,13 @@
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     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22163,14 +22360,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22185,14 +22381,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22207,14 +22402,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22229,14 +22423,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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@@ -22251,14 +22444,13 @@
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     "language": "c", 
-    "name": "h2_sockpair+trace_nosec_test", 
+    "name": "h2_sockpair_nosec_test", 
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       "linux", 
@@ -22279,7 +22471,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
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       "linux", 
@@ -22300,7 +22492,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22321,7 +22513,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22342,7 +22534,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22363,7 +22555,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22384,7 +22576,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22405,7 +22597,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22426,7 +22618,7 @@
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22447,7 +22639,7 @@
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22468,7 +22660,7 @@
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22489,7 +22681,7 @@
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     "language": "c", 
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+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22510,28 +22702,7 @@
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-    "name": "h2_sockpair_1byte_nosec_test", 
-    "platforms": [
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-      "mac", 
-      "posix"
-    ]
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-  {
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-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22552,7 +22723,7 @@
     "exclude_configs": [], 
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22573,7 +22744,7 @@
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     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
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@@ -22594,7 +22765,7 @@
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     "language": "c", 
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@@ -22615,7 +22786,7 @@
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     "language": "c", 
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+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22636,7 +22807,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22657,7 +22828,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22678,7 +22849,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22699,7 +22870,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22720,7 +22891,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22741,7 +22912,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22762,7 +22933,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22783,7 +22954,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22804,7 +22975,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22825,7 +22996,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22846,7 +23017,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22867,7 +23038,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22888,7 +23059,7 @@
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_sockpair_1byte_nosec_test", 
+    "name": "h2_sockpair+trace_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22903,14 +23074,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22925,14 +23095,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22947,14 +23116,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22969,14 +23137,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -22991,14 +23158,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23013,14 +23179,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23035,14 +23200,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23057,14 +23221,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23079,14 +23242,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23101,14 +23263,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23123,14 +23284,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23145,14 +23305,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23167,14 +23326,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23189,14 +23347,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23211,14 +23368,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23233,14 +23389,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23255,14 +23410,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23277,14 +23431,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23299,14 +23452,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23321,14 +23473,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 0.1, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23343,14 +23494,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23365,14 +23515,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23387,14 +23536,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23409,14 +23557,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23431,14 +23578,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23453,14 +23599,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23475,14 +23620,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23497,14 +23641,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23519,14 +23662,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
@@ -23541,14 +23683,13 @@
     "ci_platforms": [
       "windows", 
       "linux", 
-      "mac", 
       "posix"
     ], 
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "flaky": false, 
     "language": "c", 
-    "name": "h2_uchannel_nosec_test", 
+    "name": "h2_sockpair_1byte_nosec_test", 
     "platforms": [
       "windows", 
       "linux", 
diff --git a/vsprojects/buildtests_c.sln b/vsprojects/buildtests_c.sln
index 752fac7483800f43b4eaa85bb1f7e94f2e1cfac0..96dc4eb10740fd3776d24b9af95a06f464fec5c9 100644
--- a/vsprojects/buildtests_c.sln
+++ b/vsprojects/buildtests_c.sln
@@ -663,7 +663,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "hpack_table_test", "vcxproj
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "httpcli_format_request_test", "vcxproj\test\httpcli_format_request_test\httpcli_format_request_test.vcxproj", "{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "http_parser_test", "vcxproj\test\http_parser_test\http_parser_test.vcxproj", "{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -674,7 +674,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "httpcli_format_request_test
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "httpcli_parser_test", "vcxproj\test\httpcli_parser_test\httpcli_parser_test.vcxproj", "{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "httpcli_format_request_test", "vcxproj\test\httpcli_format_request_test\httpcli_format_request_test.vcxproj", "{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1145,7 +1145,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full_test", "vcxproj\tes
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_oauth2_test", "vcxproj\test/end2end/fixtures\h2_oauth2_test\h2_oauth2_test.vcxproj", "{0F761FF3-342A-C429-711F-F76181BAA52D}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full+trace_test", "vcxproj\test/end2end/fixtures\h2_full+trace_test\h2_full+trace_test.vcxproj", "{16C713C6-062E-F71F-A44C-52DC35494B27}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1157,7 +1157,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_oauth2_test", "vcxproj\t
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_test", "vcxproj\test/end2end/fixtures\h2_proxy_test\h2_proxy_test.vcxproj", "{5753B14F-0C69-2E56-6264-5541B2DCDF67}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_oauth2_test", "vcxproj\test/end2end/fixtures\h2_oauth2_test\h2_oauth2_test.vcxproj", "{0F761FF3-342A-C429-711F-F76181BAA52D}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1169,7 +1169,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_test", "vcxproj\te
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_test", "vcxproj\test/end2end/fixtures\h2_sockpair_test\h2_sockpair_test.vcxproj", "{67458AF8-A122-7740-F195-C2E74A106FAB}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_test", "vcxproj\test/end2end/fixtures\h2_proxy_test\h2_proxy_test.vcxproj", "{5753B14F-0C69-2E56-6264-5541B2DCDF67}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1181,7 +1181,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_test", "vcxproj
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_test", "vcxproj\test/end2end/fixtures\h2_sockpair+trace_test\h2_sockpair+trace_test.vcxproj", "{82878169-5A89-FD1E-31A6-E9F07BB92418}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_test", "vcxproj\test/end2end/fixtures\h2_sockpair_test\h2_sockpair_test.vcxproj", "{67458AF8-A122-7740-F195-C2E74A106FAB}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1193,7 +1193,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_test", "v
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_test", "vcxproj\test/end2end/fixtures\h2_sockpair_1byte_test\h2_sockpair_1byte_test.vcxproj", "{03A65361-E139-5344-1868-8E8FC269C6E6}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_test", "vcxproj\test/end2end/fixtures\h2_sockpair+trace_test\h2_sockpair+trace_test.vcxproj", "{82878169-5A89-FD1E-31A6-E9F07BB92418}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1205,7 +1205,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_test", "v
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_test", "vcxproj\test/end2end/fixtures\h2_ssl_test\h2_ssl_test.vcxproj", "{EA78D290-4098-FF04-C647-013F6B81E4E7}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_test", "vcxproj\test/end2end/fixtures\h2_sockpair_1byte_test\h2_sockpair_1byte_test.vcxproj", "{03A65361-E139-5344-1868-8E8FC269C6E6}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1217,7 +1217,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_test", "vcxproj\test
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_proxy_test", "vcxproj\test/end2end/fixtures\h2_ssl_proxy_test\h2_ssl_proxy_test.vcxproj", "{A9092608-E45E-AC96-6533-A6E7DD98211D}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_test", "vcxproj\test/end2end/fixtures\h2_ssl_test\h2_ssl_test.vcxproj", "{EA78D290-4098-FF04-C647-013F6B81E4E7}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1229,7 +1229,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_proxy_test", "vcxpro
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_test", "vcxproj\test/end2end/fixtures\h2_uchannel_test\h2_uchannel_test.vcxproj", "{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_ssl_proxy_test", "vcxproj\test/end2end/fixtures\h2_ssl_proxy_test\h2_ssl_proxy_test.vcxproj", "{A9092608-E45E-AC96-6533-A6E7DD98211D}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1277,7 +1277,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full_nosec_test", "vcxpr
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_nosec_test", "vcxproj\test/end2end/fixtures\h2_proxy_nosec_test\h2_proxy_nosec_test.vcxproj", "{6EC72045-98CB-8A8D-9788-BC94209E23C8}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_full+trace_nosec_test", "vcxproj\test/end2end/fixtures\h2_full+trace_nosec_test\h2_full+trace_nosec_test.vcxproj", "{DFD51943-4906-8051-7D66-6A7D50E0D87E}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1289,7 +1289,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_nosec_test", "vcxp
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair_nosec_test\h2_sockpair_nosec_test.vcxproj", "{B3F26242-A43D-4F77-A84C-0F478741A061}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_proxy_nosec_test", "vcxproj\test/end2end/fixtures\h2_proxy_nosec_test\h2_proxy_nosec_test.vcxproj", "{6EC72045-98CB-8A8D-9788-BC94209E23C8}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1301,7 +1301,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_nosec_test", "v
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair+trace_nosec_test\h2_sockpair+trace_nosec_test.vcxproj", "{962380E0-1C06-8917-8F7F-1A02E0E93BE7}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair_nosec_test\h2_sockpair_nosec_test.vcxproj", "{B3F26242-A43D-4F77-A84C-0F478741A061}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1313,7 +1313,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_nosec_tes
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair_1byte_nosec_test\h2_sockpair_1byte_nosec_test.vcxproj", "{485E6713-487D-F274-BDE7-5D29300C93FE}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair+trace_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair+trace_nosec_test\h2_sockpair+trace_nosec_test.vcxproj", "{962380E0-1C06-8917-8F7F-1A02E0E93BE7}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -1325,7 +1325,7 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_nosec_tes
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_nosec_test", "vcxproj\test/end2end/fixtures\h2_uchannel_nosec_test\h2_uchannel_nosec_test.vcxproj", "{BD79A629-4181-DB5E-C28F-44EB280A6F91}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_sockpair_1byte_nosec_test", "vcxproj\test/end2end/fixtures\h2_sockpair_1byte_nosec_test\h2_sockpair_1byte_nosec_test.vcxproj", "{485E6713-487D-F274-BDE7-5D29300C93FE}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
 	EndProjectSection
@@ -2405,6 +2405,22 @@ Global
 		{FF2CEE6D-850F-E22C-53A0-8C5912B14B20}.Release-DLL|Win32.Build.0 = Release|Win32
 		{FF2CEE6D-850F-E22C-53A0-8C5912B14B20}.Release-DLL|x64.ActiveCfg = Release|x64
 		{FF2CEE6D-850F-E22C-53A0-8C5912B14B20}.Release-DLL|x64.Build.0 = Release|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug|Win32.ActiveCfg = Debug|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug|x64.ActiveCfg = Debug|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release|Win32.ActiveCfg = Release|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release|x64.ActiveCfg = Release|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug|Win32.Build.0 = Debug|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug|x64.Build.0 = Debug|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release|Win32.Build.0 = Release|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release|x64.Build.0 = Release|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Debug-DLL|x64.Build.0 = Debug|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release-DLL|Win32.Build.0 = Release|Win32
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release-DLL|x64.ActiveCfg = Release|x64
+		{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}.Release-DLL|x64.Build.0 = Release|x64
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Debug|Win32.ActiveCfg = Debug|Win32
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Debug|x64.ActiveCfg = Debug|x64
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Release|Win32.ActiveCfg = Release|Win32
@@ -2421,22 +2437,6 @@ Global
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Release-DLL|Win32.Build.0 = Release|Win32
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Release-DLL|x64.ActiveCfg = Release|x64
 		{A43C3292-CAE7-1B8C-A5FD-52D9E3DCFD82}.Release-DLL|x64.Build.0 = Release|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug|Win32.ActiveCfg = Debug|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug|x64.ActiveCfg = Debug|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release|Win32.ActiveCfg = Release|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release|x64.ActiveCfg = Release|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug|Win32.Build.0 = Debug|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug|x64.Build.0 = Debug|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release|Win32.Build.0 = Release|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release|x64.Build.0 = Release|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Debug-DLL|x64.Build.0 = Debug|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|Win32.Build.0 = Release|Win32
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|x64.ActiveCfg = Release|x64
-		{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}.Release-DLL|x64.Build.0 = Release|x64
 		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|Win32.ActiveCfg = Debug|Win32
 		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Debug|x64.ActiveCfg = Debug|x64
 		{117CA7AD-C42B-9217-6C95-42A801777BC5}.Release|Win32.ActiveCfg = Release|Win32
@@ -3093,6 +3093,22 @@ Global
 		{EEBEFA75-C625-C823-FE96-9AD64887B57D}.Release-DLL|Win32.Build.0 = Release|Win32
 		{EEBEFA75-C625-C823-FE96-9AD64887B57D}.Release-DLL|x64.ActiveCfg = Release|x64
 		{EEBEFA75-C625-C823-FE96-9AD64887B57D}.Release-DLL|x64.Build.0 = Release|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug|Win32.ActiveCfg = Debug|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug|x64.ActiveCfg = Debug|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release|Win32.ActiveCfg = Release|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release|x64.ActiveCfg = Release|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug|Win32.Build.0 = Debug|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug|x64.Build.0 = Debug|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release|Win32.Build.0 = Release|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release|x64.Build.0 = Release|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Debug-DLL|x64.Build.0 = Debug|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|Win32.Build.0 = Release|Win32
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|x64.ActiveCfg = Release|x64
+		{16C713C6-062E-F71F-A44C-52DC35494B27}.Release-DLL|x64.Build.0 = Release|x64
 		{0F761FF3-342A-C429-711F-F76181BAA52D}.Debug|Win32.ActiveCfg = Debug|Win32
 		{0F761FF3-342A-C429-711F-F76181BAA52D}.Debug|x64.ActiveCfg = Debug|x64
 		{0F761FF3-342A-C429-711F-F76181BAA52D}.Release|Win32.ActiveCfg = Release|Win32
@@ -3205,22 +3221,6 @@ Global
 		{A9092608-E45E-AC96-6533-A6E7DD98211D}.Release-DLL|Win32.Build.0 = Release|Win32
 		{A9092608-E45E-AC96-6533-A6E7DD98211D}.Release-DLL|x64.ActiveCfg = Release|x64
 		{A9092608-E45E-AC96-6533-A6E7DD98211D}.Release-DLL|x64.Build.0 = Release|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug|Win32.ActiveCfg = Debug|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug|x64.ActiveCfg = Debug|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release|Win32.ActiveCfg = Release|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release|x64.ActiveCfg = Release|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug|Win32.Build.0 = Debug|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug|x64.Build.0 = Debug|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release|Win32.Build.0 = Release|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release|x64.Build.0 = Release|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Debug-DLL|x64.Build.0 = Debug|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release-DLL|Win32.Build.0 = Release|Win32
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release-DLL|x64.ActiveCfg = Release|x64
-		{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}.Release-DLL|x64.Build.0 = Release|x64
 		{A8039D43-910E-4248-2A22-74366E8C4DCD}.Debug|Win32.ActiveCfg = Debug|Win32
 		{A8039D43-910E-4248-2A22-74366E8C4DCD}.Debug|x64.ActiveCfg = Debug|x64
 		{A8039D43-910E-4248-2A22-74366E8C4DCD}.Release|Win32.ActiveCfg = Release|Win32
@@ -3269,6 +3269,22 @@ Global
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Release-DLL|Win32.Build.0 = Release|Win32
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Release-DLL|x64.ActiveCfg = Release|x64
 		{345EA50E-BCD4-DAC7-E1C8-DDA6291B75E2}.Release-DLL|x64.Build.0 = Release|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug|Win32.ActiveCfg = Debug|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug|x64.ActiveCfg = Debug|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release|Win32.ActiveCfg = Release|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release|x64.ActiveCfg = Release|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug|Win32.Build.0 = Debug|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug|x64.Build.0 = Debug|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release|Win32.Build.0 = Release|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release|x64.Build.0 = Release|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Debug-DLL|x64.Build.0 = Debug|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release-DLL|Win32.Build.0 = Release|Win32
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release-DLL|x64.ActiveCfg = Release|x64
+		{DFD51943-4906-8051-7D66-6A7D50E0D87E}.Release-DLL|x64.Build.0 = Release|x64
 		{6EC72045-98CB-8A8D-9788-BC94209E23C8}.Debug|Win32.ActiveCfg = Debug|Win32
 		{6EC72045-98CB-8A8D-9788-BC94209E23C8}.Debug|x64.ActiveCfg = Debug|x64
 		{6EC72045-98CB-8A8D-9788-BC94209E23C8}.Release|Win32.ActiveCfg = Release|Win32
@@ -3333,22 +3349,6 @@ Global
 		{485E6713-487D-F274-BDE7-5D29300C93FE}.Release-DLL|Win32.Build.0 = Release|Win32
 		{485E6713-487D-F274-BDE7-5D29300C93FE}.Release-DLL|x64.ActiveCfg = Release|x64
 		{485E6713-487D-F274-BDE7-5D29300C93FE}.Release-DLL|x64.Build.0 = Release|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug|Win32.ActiveCfg = Debug|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug|x64.ActiveCfg = Debug|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release|Win32.ActiveCfg = Release|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release|x64.ActiveCfg = Release|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug|Win32.Build.0 = Debug|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug|x64.Build.0 = Debug|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release|Win32.Build.0 = Release|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release|x64.Build.0 = Release|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Debug-DLL|x64.Build.0 = Debug|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release-DLL|Win32.Build.0 = Release|Win32
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release-DLL|x64.ActiveCfg = Release|x64
-		{BD79A629-4181-DB5E-C28F-44EB280A6F91}.Release-DLL|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 4248ade4b2e1c930afe3d34db3e3f6c4f32a15b7..ebc367436082b2aa221b9f5c582081ec4b72bf49 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -283,10 +283,11 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_plugin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_args.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_uchannel.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\compress_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\connected_channel.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\context.h" />
@@ -314,9 +315,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\compression\algorithm_metadata.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\compression\message_compress.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\debug\trace.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\format_request.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\httpcli.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\parser.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\format_request.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\httpcli.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\parser.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\endpoint_pair.h" />
@@ -348,6 +349,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\workqueue.h" />
@@ -364,9 +366,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\call.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\call_test_only.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_init.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\completion_queue.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\event_string.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\init.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\lame_client.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\server.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\surface_trace.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\byte_stream.h" />
@@ -424,13 +429,15 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_plugin.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_args.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\compress_filter.c">
     </ClCompile>
@@ -486,11 +493,11 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\debug\trace.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\format_request.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\format_request.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\parser.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\parser.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\closure.c">
     </ClCompile>
@@ -560,6 +567,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\udp_server.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix_noop.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_eventfd.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_nospecial.c">
@@ -602,8 +613,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_create.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_init.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_ping.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\completion_queue.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\event_string.c">
@@ -618,8 +633,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_chttp2.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\version.c">
@@ -680,7 +693,7 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\transport_op_string.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli_security_connector.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\security\b64.c">
     </ClCompile>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 31fb00388dc7e534a82d370675630ae10d48eb30..e5bff0e4f3ab5b9844c4708bdb7463f34ab28ab5 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -7,16 +7,19 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_plugin.c">
+      <Filter>src\core\census</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_args.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\compress_filter.c">
@@ -100,14 +103,14 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\debug\trace.c">
       <Filter>src\core\debug</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\format_request.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\format_request.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\parser.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\parser.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\closure.c">
       <Filter>src\core\iomgr</Filter>
@@ -211,6 +214,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\udp_server.c">
       <Filter>src\core\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.c">
+      <Filter>src\core\iomgr</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix_noop.c">
+      <Filter>src\core\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_eventfd.c">
       <Filter>src\core\iomgr</Filter>
     </ClCompile>
@@ -274,9 +283,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_create.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_init.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_ping.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\completion_queue.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -298,9 +313,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_chttp2.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
-      <Filter>src\core\surface</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -391,8 +403,8 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\transport_op_string.c">
       <Filter>src\core\transport</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli_security_connector.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli_security_connector.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\security\b64.c">
       <Filter>src\core\security</Filter>
@@ -527,16 +539,19 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_plugin.h">
+      <Filter>src\core\census</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_args.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_uchannel.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\compress_filter.h">
@@ -620,14 +635,14 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\debug\trace.h">
       <Filter>src\core\debug</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\format_request.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\format_request.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\httpcli.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\httpcli.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\parser.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\parser.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\closure.h">
       <Filter>src\core\iomgr</Filter>
@@ -722,6 +737,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.h">
+      <Filter>src\core\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
@@ -770,6 +788,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_init.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\completion_queue.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
@@ -779,6 +803,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\init.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\lame_client.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\server.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
@@ -974,8 +1001,8 @@
     <Filter Include="src\core\debug">
       <UniqueIdentifier>{1da7ef8a-a06d-5499-b3de-19fee4a4214d}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\httpcli">
-      <UniqueIdentifier>{a9bc00ad-835f-c625-c6d9-6a1324f98b9f}</UniqueIdentifier>
+    <Filter Include="src\core\http">
+      <UniqueIdentifier>{404fdb9e-a69c-81d4-035b-465c826115a9}</UniqueIdentifier>
     </Filter>
     <Filter Include="src\core\iomgr">
       <UniqueIdentifier>{1baf3894-af37-e647-bdbc-95dc17ed0073}</UniqueIdentifier>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index 5735327b7863b22b57e3926c092bd6860a87a0c6..487ffe0fd82f754db9cb780a121a230eccb63089 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -155,6 +155,7 @@
     <ClInclude Include="$(SolutionDir)\..\test\core\util\grpc_profiler.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\parse_hexstring.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\port.h" />
+    <ClInclude Include="$(SolutionDir)\..\test\core\util\port_server_client.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\slice_splitter.h" />
   </ItemGroup>
   <ItemGroup>
@@ -178,6 +179,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\util\port_server_client.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_windows.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\slice_splitter.c">
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index 47a689a8224af90083263c6e0d616dcfdf9b1cf3..68c75e8a179b6f15c68e1ed4abb78f7dab98f04c 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -31,6 +31,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_posix.c">
       <Filter>test\core\util</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\util\port_server_client.c">
+      <Filter>test\core\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_windows.c">
       <Filter>test\core\util</Filter>
     </ClCompile>
@@ -63,6 +66,9 @@
     <ClInclude Include="$(SolutionDir)\..\test\core\util\port.h">
       <Filter>test\core\util</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\test\core\util\port_server_client.h">
+      <Filter>test\core\util</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\test\core\util\slice_splitter.h">
       <Filter>test\core\util</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj b/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
index 6ff6ec9a5641351d68e668efc7bca734965627a7..2a3c50e85c95f275ae598961bec0e4f28165613d 100644
--- a/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj
@@ -153,6 +153,7 @@
     <ClInclude Include="$(SolutionDir)\..\test\core\util\grpc_profiler.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\parse_hexstring.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\port.h" />
+    <ClInclude Include="$(SolutionDir)\..\test\core\util\port_server_client.h" />
     <ClInclude Include="$(SolutionDir)\..\test\core\util\slice_splitter.h" />
   </ItemGroup>
   <ItemGroup>
@@ -168,6 +169,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\util\port_server_client.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_windows.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\slice_splitter.c">
diff --git a/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj.filters
index 3b682cec6d22f1e7499d05ed8f640400409bc288..cdb19e1b467901d03350684df980162c96a8c422 100644
--- a/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util_unsecure/grpc_test_util_unsecure.vcxproj.filters
@@ -19,6 +19,9 @@
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_posix.c">
       <Filter>test\core\util</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\test\core\util\port_server_client.c">
+      <Filter>test\core\util</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\test\core\util\port_windows.c">
       <Filter>test\core\util</Filter>
     </ClCompile>
@@ -45,6 +48,9 @@
     <ClInclude Include="$(SolutionDir)\..\test\core\util\port.h">
       <Filter>test\core\util</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\test\core\util\port_server_client.h">
+      <Filter>test\core\util</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\test\core\util\slice_splitter.h">
       <Filter>test\core\util</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index f0d869ba9307f6388fce4949437e8534d4ad84a6..4f2336aab2e22227a5e96497f6b6ed43d1b0cb10 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -273,10 +273,11 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_plugin.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_args.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_uchannel.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\compress_filter.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\connected_channel.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\context.h" />
@@ -304,9 +305,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\compression\algorithm_metadata.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\compression\message_compress.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\debug\trace.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\format_request.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\httpcli.h" />
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\parser.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\format_request.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\httpcli.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\parser.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\closure.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\endpoint.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\endpoint_pair.h" />
@@ -338,6 +339,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\timer_heap.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\workqueue.h" />
@@ -354,9 +356,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\call.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\call_test_only.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_init.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\completion_queue.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\event_string.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\init.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\lame_client.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\server.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\surface_trace.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\transport\byte_stream.h" />
@@ -402,13 +407,15 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_plugin.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_args.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\compress_filter.c">
     </ClCompile>
@@ -464,11 +471,11 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\debug\trace.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\format_request.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\format_request.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\parser.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\parser.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\closure.c">
     </ClCompile>
@@ -538,6 +545,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\udp_server.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix_noop.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_eventfd.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_nospecial.c">
@@ -580,8 +591,12 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_create.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_init.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_ping.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\completion_queue.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\event_string.c">
@@ -596,8 +611,6 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_chttp2.c">
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\version.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 1f240212a389df9256e808d5b6ec8d94f84a2cef..e31ece741d064fafacb6e0a6f7296eaebd5cd411 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -10,16 +10,19 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_filter.c">
       <Filter>src\core\census</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\census\grpc_plugin.c">
+      <Filter>src\core\census</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_args.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\src\core\channel\client_channel.c">
       <Filter>src\core\channel</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\channel\compress_filter.c">
@@ -103,14 +106,14 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\debug\trace.c">
       <Filter>src\core\debug</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\format_request.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\format_request.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\httpcli.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\httpcli.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\httpcli\parser.c">
-      <Filter>src\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\src\core\http\parser.c">
+      <Filter>src\core\http</Filter>
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\closure.c">
       <Filter>src\core\iomgr</Filter>
@@ -214,6 +217,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\udp_server.c">
       <Filter>src\core\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.c">
+      <Filter>src\core\iomgr</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix_noop.c">
+      <Filter>src\core\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_eventfd.c">
       <Filter>src\core\iomgr</Filter>
     </ClCompile>
@@ -277,9 +286,15 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_create.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_init.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_ping.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\completion_queue.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -301,9 +316,6 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_chttp2.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
-    <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
-      <Filter>src\core\surface</Filter>
-    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
@@ -464,16 +476,19 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_filter.h">
       <Filter>src\core\census</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\census\grpc_plugin.h">
+      <Filter>src\core\census</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_args.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\channel_stack_builder.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_uchannel.h">
+    <ClInclude Include="$(SolutionDir)\..\src\core\channel\client_channel.h">
       <Filter>src\core\channel</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\channel\compress_filter.h">
@@ -557,14 +572,14 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\debug\trace.h">
       <Filter>src\core\debug</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\format_request.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\format_request.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\httpcli.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\httpcli.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
-    <ClInclude Include="$(SolutionDir)\..\src\core\httpcli\parser.h">
-      <Filter>src\core\httpcli</Filter>
+    <ClInclude Include="$(SolutionDir)\..\src\core\http\parser.h">
+      <Filter>src\core\http</Filter>
     </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\closure.h">
       <Filter>src\core\iomgr</Filter>
@@ -659,6 +674,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\udp_server.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\unix_sockets_posix.h">
+      <Filter>src\core\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\iomgr\wakeup_fd_pipe.h">
       <Filter>src\core\iomgr</Filter>
     </ClInclude>
@@ -707,6 +725,12 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_init.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\channel_stack_type.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\completion_queue.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
@@ -716,6 +740,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\init.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\surface\lame_client.h">
+      <Filter>src\core\surface</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\surface\server.h">
       <Filter>src\core\surface</Filter>
     </ClInclude>
@@ -869,8 +896,8 @@
     <Filter Include="src\core\debug">
       <UniqueIdentifier>{6d8d5774-7291-554d-fafa-583463cd3fd9}</UniqueIdentifier>
     </Filter>
-    <Filter Include="src\core\httpcli">
-      <UniqueIdentifier>{1ba3a245-47e7-89b5-b0c9-aca758bd0277}</UniqueIdentifier>
+    <Filter Include="src\core\http">
+      <UniqueIdentifier>{46faed8e-5cd4-98b0-05ed-ff2ac7bc2d46}</UniqueIdentifier>
     </Filter>
     <Filter Include="src\core\iomgr">
       <UniqueIdentifier>{a9df8b24-ecea-ff6d-8999-d8fa54cd70bf}</UniqueIdentifier>
diff --git a/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj
new file mode 100644
index 0000000000000000000000000000000000000000..9d5aa67e06c0a7f086f3a7c5f6c73bf4dce18774
--- /dev/null
+++ b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj
@@ -0,0 +1,198 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{A18A6879-13EB-F421-E270-03C6DBD6A6B7}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\cpptest.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\protobuf.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>boringssl_asn1_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>boringssl_asn1_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\vsprojects\dummy.c">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\test/boringssl\boringssl_asn1_test_lib\boringssl_asn1_test_lib.vcxproj">
+      <Project>{37B78CF5-2090-3DC6-FF98-17381709846A}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\boringssl_test_util\boringssl_test_util.vcxproj">
+      <Project>{427037B1-B51B-D6F1-5025-AD12B200266A}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\boringssl\boringssl.vcxproj">
+      <Project>{9FD9A3EF-C4A3-8390-D8F4-6F86C22A58CE}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies\grpc.dependencies.zlib.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies\grpc.dependencies.openssl.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.redist.1.2.8.10\build\native\grpc.dependencies.zlib.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.zlib.1.2.8.10\build\native\grpc.dependencies.zlib.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.redist.1.0.204.1\build\native\grpc.dependencies.openssl.redist.targets')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props')" />
+    <Error Condition="!Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.targets')" />
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj.filters b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj.filters
new file mode 100644
index 0000000000000000000000000000000000000000..00e4276f1d4a4424020141e0c5296974350bd7ba
--- /dev/null
+++ b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test/boringssl_asn1_test.vcxproj.filters
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+  <ItemGroup>
+  </ItemGroup>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj
new file mode 100644
index 0000000000000000000000000000000000000000..177bfcbb3b77384e2a6fa43641a5f1190ccc6110
--- /dev/null
+++ b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{37B78CF5-2090-3DC6-FF98-17381709846A}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>boringssl_asn1_test_lib</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>boringssl_asn1_test_lib</TargetName>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\third_party\boringssl\crypto\asn1\asn1_test.cc">
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\boringssl_test_util\boringssl_test_util.vcxproj">
+      <Project>{427037B1-B51B-D6F1-5025-AD12B200266A}</Project>
+    </ProjectReference>
+    <ProjectReference Include="$(SolutionDir)\..\vsprojects\vcxproj\.\boringssl\boringssl.vcxproj">
+      <Project>{9FD9A3EF-C4A3-8390-D8F4-6F86C22A58CE}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+  </Target>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj.filters b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj.filters
new file mode 100644
index 0000000000000000000000000000000000000000..d508701e3cd51abcd1dd9879c84e26a39994eeed
--- /dev/null
+++ b/vsprojects/vcxproj/test/boringssl/boringssl_asn1_test_lib/boringssl_asn1_test_lib.vcxproj.filters
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClCompile Include="$(SolutionDir)\..\third_party\boringssl\crypto\asn1\asn1_test.cc">
+      <Filter>third_party\boringssl\crypto\asn1</Filter>
+    </ClCompile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Filter Include="third_party">
+      <UniqueIdentifier>{4115523a-a0e5-e13f-f46b-76308dedf6f3}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\boringssl">
+      <UniqueIdentifier>{c1481ada-4ab1-0cb6-8828-83f09d5421e4}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\boringssl\crypto">
+      <UniqueIdentifier>{199f1153-e7a0-fcef-73f5-eb766cb38fc3}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="third_party\boringssl\crypto\asn1">
+      <UniqueIdentifier>{c5964062-112a-0884-d3ae-d8aec947c2f3}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+</Project>
+
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj
similarity index 98%
rename from vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj
rename to vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj
index 76a9e5600f54a56a07976369179d0eadfafff842..a59e08213c1e6814abb4753a874f14c7edb54758 100644
--- a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj
@@ -20,7 +20,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{BD79A629-4181-DB5E-C28F-44EB280A6F91}</ProjectGuid>
+    <ProjectGuid>{DFD51943-4906-8051-7D66-6A7D50E0D87E}</ProjectGuid>
     <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
     <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
   </PropertyGroup>
@@ -60,14 +60,14 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">
-    <TargetName>h2_uchannel_nosec_test</TargetName>
+    <TargetName>h2_full+trace_nosec_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
     <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <TargetName>h2_uchannel_nosec_test</TargetName>
+    <TargetName>h2_full+trace_nosec_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
@@ -158,7 +158,7 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+trace.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj.filters b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj.filters
similarity index 68%
rename from vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj.filters
rename to vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj.filters
index c9adeeebafcf13ab38994ca7f896b65f95d20771..c9164af19aecd8651c753a162668f37b2c959f87 100644
--- a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_nosec_test/h2_uchannel_nosec_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_nosec_test/h2_full+trace_nosec_test.vcxproj.filters
@@ -1,23 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+trace.c">
       <Filter>test\core\end2end\fixtures</Filter>
     </ClCompile>
   </ItemGroup>
 
   <ItemGroup>
     <Filter Include="test">
-      <UniqueIdentifier>{549b9d3c-70c0-f3de-36d6-5b2ce5fb098c}</UniqueIdentifier>
+      <UniqueIdentifier>{2828a8fc-bcc1-7b1c-4953-0c8eaf9fe643}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core">
-      <UniqueIdentifier>{d37f19b6-6893-6a90-09d2-e50d891899ff}</UniqueIdentifier>
+      <UniqueIdentifier>{d8e78fb2-4316-018b-704a-0944fd0c6fd9}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core\end2end">
-      <UniqueIdentifier>{bde36bf9-4894-e85b-4a35-f7b1abe9387f}</UniqueIdentifier>
+      <UniqueIdentifier>{1981c949-24c5-413c-ab03-24eff55e803a}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core\end2end\fixtures">
-      <UniqueIdentifier>{e16ce654-bd8c-2527-1077-e6cd2639c1cb}</UniqueIdentifier>
+      <UniqueIdentifier>{bfc11ba4-7401-55f0-8513-598aa93e7e1a}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
 </Project>
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj
similarity index 98%
rename from vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj
rename to vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj
index 15646086310f992917bb784be30ed57b7910dbfa..6ca9dfa46de552355ac4b8b2a66ec25c3a46f855 100644
--- a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj
@@ -20,7 +20,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{E39D59C4-F5CB-7D68-DA6B-C6BC93843435}</ProjectGuid>
+    <ProjectGuid>{16C713C6-062E-F71F-A44C-52DC35494B27}</ProjectGuid>
     <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
     <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
   </PropertyGroup>
@@ -60,14 +60,14 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">
-    <TargetName>h2_uchannel_test</TargetName>
+    <TargetName>h2_full+trace_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
     <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <TargetName>h2_uchannel_test</TargetName>
+    <TargetName>h2_full+trace_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
@@ -158,7 +158,7 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+trace.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj.filters b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj.filters
similarity index 68%
rename from vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj.filters
rename to vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj.filters
index 611a643a3333d40d09024ae8e3a495020b3045e9..87e8e7228bea3ca726f8b22a8b6fa14f8d0e178d 100644
--- a/vsprojects/vcxproj/test/end2end/fixtures/h2_uchannel_test/h2_uchannel_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/end2end/fixtures/h2_full+trace_test/h2_full+trace_test.vcxproj.filters
@@ -1,23 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_uchannel.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\end2end\fixtures\h2_full+trace.c">
       <Filter>test\core\end2end\fixtures</Filter>
     </ClCompile>
   </ItemGroup>
 
   <ItemGroup>
     <Filter Include="test">
-      <UniqueIdentifier>{0e4c3b3f-4d89-039d-c4d2-3bd39bb5701f}</UniqueIdentifier>
+      <UniqueIdentifier>{00848213-d356-89b0-1d05-8131961dc959}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core">
-      <UniqueIdentifier>{75084bcc-1809-7f7a-8989-d8fe2d5d404f}</UniqueIdentifier>
+      <UniqueIdentifier>{863a91b6-f5f9-5326-129a-10003d7af98f}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core\end2end">
-      <UniqueIdentifier>{9e123c51-0a8c-f222-f2f9-3cee19f2f99e}</UniqueIdentifier>
+      <UniqueIdentifier>{2733ff09-adc7-fd49-696f-5f72df2f44e2}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core\end2end\fixtures">
-      <UniqueIdentifier>{999ee744-f147-9430-9a09-a16f69ecfa2a}</UniqueIdentifier>
+      <UniqueIdentifier>{62aa4eaf-c183-f2af-9ef9-a88ee802702c}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
 </Project>
diff --git a/vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj b/vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj
similarity index 98%
rename from vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj
rename to vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj
index 6f976309c599e3395b7d5d99815d83e7e14afe0b..bd5cf1212c5d75eac8a9ca9466c15d71278b4cae 100644
--- a/vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj
+++ b/vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj
@@ -20,7 +20,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{B6F60D1C-D4F3-0F1A-4A2F-9134629B7848}</ProjectGuid>
+    <ProjectGuid>{49D7E690-BDA1-5236-1ABF-3D81C1559DF7}</ProjectGuid>
     <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
     <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
   </PropertyGroup>
@@ -60,14 +60,14 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)'=='Debug'">
-    <TargetName>httpcli_parser_test</TargetName>
+    <TargetName>http_parser_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
     <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <TargetName>httpcli_parser_test</TargetName>
+    <TargetName>http_parser_test</TargetName>
     <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
     <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
     <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
@@ -158,7 +158,7 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\httpcli\parser_test.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\http\parser_test.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj.filters b/vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj.filters
similarity index 51%
rename from vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj.filters
rename to vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj.filters
index 1cdc32fb850d0807be33d755416d4aaa3b5c66a4..4353c3b61ff88f0dd7553f91a1142e6f502cc839 100644
--- a/vsprojects/vcxproj/test/httpcli_parser_test/httpcli_parser_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/http_parser_test/http_parser_test.vcxproj.filters
@@ -1,20 +1,20 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\httpcli\parser_test.c">
-      <Filter>test\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\test\core\http\parser_test.c">
+      <Filter>test\core\http</Filter>
     </ClCompile>
   </ItemGroup>
 
   <ItemGroup>
     <Filter Include="test">
-      <UniqueIdentifier>{f3562e8b-3020-c79a-4e3b-c895f9e49f44}</UniqueIdentifier>
+      <UniqueIdentifier>{1d07f09d-a0ec-d684-3589-bff02afbe830}</UniqueIdentifier>
     </Filter>
     <Filter Include="test\core">
-      <UniqueIdentifier>{db527686-b5c7-68df-a106-bd919f60742a}</UniqueIdentifier>
+      <UniqueIdentifier>{eedab59d-9f19-9172-cf0e-83a839217afc}</UniqueIdentifier>
     </Filter>
-    <Filter Include="test\core\httpcli">
-      <UniqueIdentifier>{8e60d460-93de-c6e1-b67b-bfae71bd9bca}</UniqueIdentifier>
+    <Filter Include="test\core\http">
+      <UniqueIdentifier>{1fcac48f-3718-00ea-6c0c-aafa1a4de528}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
 </Project>
diff --git a/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj b/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj
index 97f14f6c8e44f594376240207c6744fbee9cce51..5515349b9b2ab06708774897ae0b0e6af8d3d79c 100644
--- a/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj
+++ b/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj
@@ -158,7 +158,7 @@
   </ItemDefinitionGroup>
 
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\httpcli\format_request_test.c">
+    <ClCompile Include="$(SolutionDir)\..\test\core\http\format_request_test.c">
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
diff --git a/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj.filters b/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj.filters
index c54ded579bc45d08fa51171d8d531ce9dfb13950..6f941f4361db679420140675b5810eacdec70d4c 100644
--- a/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj.filters
+++ b/vsprojects/vcxproj/test/httpcli_format_request_test/httpcli_format_request_test.vcxproj.filters
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <ClCompile Include="$(SolutionDir)\..\test\core\httpcli\format_request_test.c">
-      <Filter>test\core\httpcli</Filter>
+    <ClCompile Include="$(SolutionDir)\..\test\core\http\format_request_test.c">
+      <Filter>test\core\http</Filter>
     </ClCompile>
   </ItemGroup>
 
@@ -13,8 +13,8 @@
     <Filter Include="test\core">
       <UniqueIdentifier>{f033cf49-b830-5698-3989-6ec75817333b}</UniqueIdentifier>
     </Filter>
-    <Filter Include="test\core\httpcli">
-      <UniqueIdentifier>{75330e6a-521e-5f90-defd-652a4591dbe9}</UniqueIdentifier>
+    <Filter Include="test\core\http">
+      <UniqueIdentifier>{51615bc9-b61d-8d7d-9abb-5409276c04ec}</UniqueIdentifier>
     </Filter>
   </ItemGroup>
 </Project>