diff --git a/.rspec b/.rspec
new file mode 100755
index 0000000000000000000000000000000000000000..b94d663c9acfaed8a1aec0d26e69cde457f4f44b
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,6 @@
+-Isrc/ruby
+-Isrc/ruby/pb
+--backtrace
+--require spec/spec_helper
+--format documentation
+--color
diff --git a/BUILD b/BUILD
index 2b386fb814c051226020a0fc16fc1094f245e667..fc07de771668c0f719a2ae4f6b23de75e3678eec 100644
--- a/BUILD
+++ b/BUILD
@@ -385,6 +385,7 @@ cc_library(
     "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",
     "src/core/transport/chttp2/alpn.c",
@@ -656,6 +657,7 @@ cc_library(
     "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",
     "src/core/transport/chttp2/alpn.c",
@@ -1190,6 +1192,7 @@ objc_library(
     "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",
     "src/core/transport/chttp2/alpn.c",
diff --git a/src/ruby/Gemfile b/Gemfile
similarity index 100%
rename from src/ruby/Gemfile
rename to Gemfile
diff --git a/Makefile b/Makefile
index 52414cffc1822a2629a7f290241fa4b4e55481d8..42ffdfba167ece71af94a3fe53a3ac11476b39e1 100644
--- a/Makefile
+++ b/Makefile
@@ -903,6 +903,7 @@ cxx_slice_test: $(BINDIR)/$(CONFIG)/cxx_slice_test
 cxx_string_ref_test: $(BINDIR)/$(CONFIG)/cxx_string_ref_test
 cxx_time_test: $(BINDIR)/$(CONFIG)/cxx_time_test
 end2end_test: $(BINDIR)/$(CONFIG)/end2end_test
+generic_async_streaming_ping_pong_test: $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test
 generic_end2end_test: $(BINDIR)/$(CONFIG)/generic_end2end_test
 grpc_cli: $(BINDIR)/$(CONFIG)/grpc_cli
 grpc_cpp_plugin: $(BINDIR)/$(CONFIG)/grpc_cpp_plugin
@@ -1256,6 +1257,7 @@ buildtests_cxx: buildtests_zookeeper privatelibs_cxx \
   $(BINDIR)/$(CONFIG)/cxx_string_ref_test \
   $(BINDIR)/$(CONFIG)/cxx_time_test \
   $(BINDIR)/$(CONFIG)/end2end_test \
+  $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test \
   $(BINDIR)/$(CONFIG)/generic_end2end_test \
   $(BINDIR)/$(CONFIG)/grpc_cli \
   $(BINDIR)/$(CONFIG)/interop_client \
@@ -1555,6 +1557,8 @@ test_cxx: test_zookeeper buildtests_cxx
 	$(Q) $(BINDIR)/$(CONFIG)/cxx_time_test || ( echo test cxx_time_test failed ; exit 1 )
 	$(E) "[RUN]     Testing end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/end2end_test || ( echo test end2end_test failed ; exit 1 )
+	$(E) "[RUN]     Testing generic_async_streaming_ping_pong_test"
+	$(Q) $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test || ( echo test generic_async_streaming_ping_pong_test failed ; exit 1 )
 	$(E) "[RUN]     Testing generic_end2end_test"
 	$(Q) $(BINDIR)/$(CONFIG)/generic_end2end_test || ( echo test generic_end2end_test failed ; exit 1 )
 	$(E) "[RUN]     Testing interop_test"
@@ -2418,6 +2422,7 @@ LIBGRPC_SRC = \
     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 \
     src/core/transport/chttp2/alpn.c \
@@ -2720,6 +2725,7 @@ LIBGRPC_UNSECURE_SRC = \
     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 \
     src/core/transport/chttp2/alpn.c \
@@ -9325,6 +9331,49 @@ endif
 endif
 
 
+GENERIC_ASYNC_STREAMING_PING_PONG_TEST_SRC = \
+    test/cpp/qps/generic_async_streaming_ping_pong_test.cc \
+
+GENERIC_ASYNC_STREAMING_PING_PONG_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(GENERIC_ASYNC_STREAMING_PING_PONG_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test: openssl_dep_error
+
+else
+
+
+
+
+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)/$(CONFIG)/generic_async_streaming_ping_pong_test: protobuf_dep_error
+
+else
+
+$(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test: $(PROTOBUF_DEP) $(GENERIC_ASYNC_STREAMING_PING_PONG_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LDXX) $(LDFLAGS) $(GENERIC_ASYNC_STREAMING_PING_PONG_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBSXX) $(LDLIBS_PROTOBUF) $(LDLIBS) $(LDLIBS_SECURE) $(GTEST_LIB) -o $(BINDIR)/$(CONFIG)/generic_async_streaming_ping_pong_test
+
+endif
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/generic_async_streaming_ping_pong_test.o:  $(LIBDIR)/$(CONFIG)/libqps.a $(LIBDIR)/$(CONFIG)/libgrpc++_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc++.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_generic_async_streaming_ping_pong_test: $(GENERIC_ASYNC_STREAMING_PING_PONG_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(GENERIC_ASYNC_STREAMING_PING_PONG_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 GENERIC_END2END_TEST_SRC = \
     test/cpp/end2end/generic_end2end_test.cc \
 
diff --git a/src/ruby/Rakefile b/Rakefile
similarity index 66%
rename from src/ruby/Rakefile
rename to Rakefile
index cc7832b12d2e26e8c3dd23de637b2a4a6ec0b800..079df6799628d9f1d8147480c8e10c038822f3d0 100755
--- a/src/ruby/Rakefile
+++ b/Rakefile
@@ -5,23 +5,28 @@ require 'rubocop/rake_task'
 require 'bundler/gem_tasks'
 
 # Add rubocop style checking tasks
-RuboCop::RakeTask.new
+RuboCop::RakeTask.new(:rubocop) do |task|
+  task.options = ['-c', 'src/ruby/.rubocop.yml']
+  task.patterns = ['src/ruby/{lib,spec}/**/*.rb']
+end
 
 # Add the extension compiler task
 Rake::ExtensionTask.new 'grpc' do |ext|
-  ext.lib_dir = File.join('lib', 'grpc')
+  ext.source_pattern = '**/*.{c,h}'
+  ext.ext_dir = File.join('src', 'ruby', 'ext', 'grpc')
+  ext.lib_dir = File.join('src', 'ruby', 'lib', 'grpc')
 end
 
 # Define the test suites
 SPEC_SUITES = [
-  { id: :wrapper, title: 'wrapper layer', files: %w(spec/*.rb) },
-  { id: :idiomatic, title: 'idiomatic layer', dir: %w(spec/generic),
+  { id: :wrapper, title: 'wrapper layer', files: %w(src/ruby/spec/*.rb) },
+  { id: :idiomatic, title: 'idiomatic layer', dir: %w(src/ruby/spec/generic),
     tags: ['~bidi', '~server'] },
-  { id: :bidi, title: 'bidi tests', dir: %w(spec/generic),
+  { id: :bidi, title: 'bidi tests', dir: %w(src/ruby/spec/generic),
     tag: 'bidi' },
-  { id: :server, title: 'rpc server thread tests', dir: %w(spec/generic),
+  { id: :server, title: 'rpc server thread tests', dir: %w(src/ruby/spec/generic),
     tag: 'server' },
-  { id: :pb, title: 'protobuf service tests', dir: %w(spec/pb) }
+  { id: :pb, title: 'protobuf service tests', dir: %w(src/ruby/spec/pb) }
 ]
 namespace :suite do
   SPEC_SUITES.each do |suite|
@@ -34,7 +39,7 @@ namespace :suite do
       if suite[:dir]
         suite[:dir].each { |f| spec_files += Dir["#{f}/**/*_spec.rb"] }
       end
-      helper = 'spec/spec_helper.rb'
+      helper = 'src/ruby/spec/spec_helper.rb'
       spec_files << helper unless spec_files.include?(helper)
 
       t.pattern = spec_files
diff --git a/binding.gyp b/binding.gyp
index e5b4b9722e8bdee96511d8166fb46c605bb7b9d8..a5e993353c9557b44a820acb3236c81c1b6611c6 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -279,6 +279,7 @@
         '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',
         'src/core/transport/chttp2/alpn.c',
diff --git a/build.yaml b/build.yaml
index aa30bae9f6c586f533c0e91b843c862b1f1625ed..6030b32746420630d6f0c25b0a659ec11d03ea0a 100644
--- a/build.yaml
+++ b/build.yaml
@@ -316,6 +316,7 @@ filegroups:
   - 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
   - src/core/transport/chttp2/alpn.c
@@ -1950,6 +1951,23 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: generic_async_streaming_ping_pong_test
+  build: test
+  language: c++
+  src:
+  - test/cpp/qps/generic_async_streaming_ping_pong_test.cc
+  deps:
+  - qps
+  - grpc++_test_util
+  - grpc_test_util
+  - grpc++
+  - grpc
+  - gpr_test_util
+  - gpr
+  platforms:
+  - mac
+  - linux
+  - posix
 - name: generic_end2end_test
   build: test
   language: c++
diff --git a/gRPC.podspec b/gRPC.podspec
index 80f26817d09e73d087a6cb4cf261a251ea8b8c0d..97e13c0d30dec8dd4270b6e57d094702eb2e5349 100644
--- a/gRPC.podspec
+++ b/gRPC.podspec
@@ -396,6 +396,7 @@ Pod::Spec.new do |s|
                       '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',
                       'src/core/transport/chttp2/alpn.c',
diff --git a/grpc.gemspec b/grpc.gemspec
new file mode 100755
index 0000000000000000000000000000000000000000..4f3a3f2dd91b037e37424477a1d7b8018c35e772
--- /dev/null
+++ b/grpc.gemspec
@@ -0,0 +1,416 @@
+# -*- ruby -*-
+# encoding: utf-8
+$LOAD_PATH.push File.expand_path('../src/ruby/lib', __FILE__)
+require 'grpc/version'
+
+Gem::Specification.new do |s|
+  s.name          = 'grpc'
+  s.version       = GRPC::VERSION
+  s.authors       = ['gRPC Authors']
+  s.email         = 'temiola@google.com'
+  s.homepage      = 'https://github.com/google/grpc/tree/master/src/ruby'
+  s.summary       = 'GRPC system in Ruby'
+  s.description   = 'Send RPCs from Ruby using GRPC'
+  s.license       = 'BSD-3-Clause'
+
+  s.required_ruby_version = '>= 2.0.0'
+  s.requirements << 'libgrpc ~> 0.11.0 needs to be installed'
+
+  s.files = %w( Rakefile Makefile )
+  s.files += %w( etc/roots.pem )
+  s.files += Dir.glob('src/ruby/bin/**/*')
+  s.files += Dir.glob('src/ruby/ext/**/*')
+  s.files += Dir.glob('src/ruby/lib/**/*')
+  s.files += Dir.glob('src/ruby/pb/**/*')
+  s.files += Dir.glob('include/grpc/**/*')
+  s.test_files = Dir.glob('src/ruby/spec/**/*')
+  s.bindir = 'src/ruby/bin'
+  %w(math noproto).each do |b|
+    s.executables += ["#{b}_client.rb", "#{b}_server.rb"]
+  end
+  s.executables += %w(grpc_ruby_interop_client grpc_ruby_interop_server)
+  s.require_paths = %w( src/ruby/bin src/ruby/lib src/ruby/pb )
+  s.platform      = Gem::Platform::RUBY
+
+  s.add_dependency 'google-protobuf', '~> 3.0.0alpha.1.1'
+  s.add_dependency 'googleauth', '~> 0.5.1'
+
+  s.add_development_dependency 'bundler', '~> 1.9'
+  s.add_development_dependency 'logging', '~> 2.0'
+  s.add_development_dependency 'simplecov', '~> 0.9'
+  s.add_development_dependency 'rake', '~> 10.4'
+  s.add_development_dependency 'rake-compiler', '~> 0.9'
+  s.add_development_dependency 'rspec', '~> 3.2'
+  s.add_development_dependency 'rubocop', '~> 0.30.0'
+  s.add_development_dependency 'signet', '~>0.7.0'
+
+  s.extensions = %w(src/ruby/ext/grpc/extconf.rb)
+
+  s.files += %w( include/grpc/support/alloc.h )
+  s.files += %w( include/grpc/support/atm.h )
+  s.files += %w( include/grpc/support/atm_gcc_atomic.h )
+  s.files += %w( include/grpc/support/atm_gcc_sync.h )
+  s.files += %w( include/grpc/support/atm_win32.h )
+  s.files += %w( include/grpc/support/avl.h )
+  s.files += %w( include/grpc/support/cmdline.h )
+  s.files += %w( include/grpc/support/cpu.h )
+  s.files += %w( include/grpc/support/histogram.h )
+  s.files += %w( include/grpc/support/host_port.h )
+  s.files += %w( include/grpc/support/log.h )
+  s.files += %w( include/grpc/support/log_win32.h )
+  s.files += %w( include/grpc/support/port_platform.h )
+  s.files += %w( include/grpc/support/slice.h )
+  s.files += %w( include/grpc/support/slice_buffer.h )
+  s.files += %w( include/grpc/support/string_util.h )
+  s.files += %w( include/grpc/support/subprocess.h )
+  s.files += %w( include/grpc/support/sync.h )
+  s.files += %w( include/grpc/support/sync_generic.h )
+  s.files += %w( include/grpc/support/sync_posix.h )
+  s.files += %w( include/grpc/support/sync_win32.h )
+  s.files += %w( include/grpc/support/thd.h )
+  s.files += %w( include/grpc/support/time.h )
+  s.files += %w( include/grpc/support/tls.h )
+  s.files += %w( include/grpc/support/tls_gcc.h )
+  s.files += %w( include/grpc/support/tls_msvc.h )
+  s.files += %w( include/grpc/support/tls_pthread.h )
+  s.files += %w( include/grpc/support/useful.h )
+  s.files += %w( src/core/profiling/timers.h )
+  s.files += %w( src/core/support/block_annotate.h )
+  s.files += %w( src/core/support/env.h )
+  s.files += %w( src/core/support/file.h )
+  s.files += %w( src/core/support/murmur_hash.h )
+  s.files += %w( src/core/support/stack_lockfree.h )
+  s.files += %w( src/core/support/string.h )
+  s.files += %w( src/core/support/string_win32.h )
+  s.files += %w( src/core/support/thd_internal.h )
+  s.files += %w( src/core/support/time_precise.h )
+  s.files += %w( src/core/profiling/basic_timers.c )
+  s.files += %w( src/core/profiling/stap_timers.c )
+  s.files += %w( src/core/support/alloc.c )
+  s.files += %w( src/core/support/avl.c )
+  s.files += %w( src/core/support/cmdline.c )
+  s.files += %w( src/core/support/cpu_iphone.c )
+  s.files += %w( src/core/support/cpu_linux.c )
+  s.files += %w( src/core/support/cpu_posix.c )
+  s.files += %w( src/core/support/cpu_windows.c )
+  s.files += %w( src/core/support/env_linux.c )
+  s.files += %w( src/core/support/env_posix.c )
+  s.files += %w( src/core/support/env_win32.c )
+  s.files += %w( src/core/support/file.c )
+  s.files += %w( src/core/support/file_posix.c )
+  s.files += %w( src/core/support/file_win32.c )
+  s.files += %w( src/core/support/histogram.c )
+  s.files += %w( src/core/support/host_port.c )
+  s.files += %w( src/core/support/log.c )
+  s.files += %w( src/core/support/log_android.c )
+  s.files += %w( src/core/support/log_linux.c )
+  s.files += %w( src/core/support/log_posix.c )
+  s.files += %w( src/core/support/log_win32.c )
+  s.files += %w( src/core/support/murmur_hash.c )
+  s.files += %w( src/core/support/slice.c )
+  s.files += %w( src/core/support/slice_buffer.c )
+  s.files += %w( src/core/support/stack_lockfree.c )
+  s.files += %w( src/core/support/string.c )
+  s.files += %w( src/core/support/string_posix.c )
+  s.files += %w( src/core/support/string_win32.c )
+  s.files += %w( src/core/support/subprocess_posix.c )
+  s.files += %w( src/core/support/sync.c )
+  s.files += %w( src/core/support/sync_posix.c )
+  s.files += %w( src/core/support/sync_win32.c )
+  s.files += %w( src/core/support/thd.c )
+  s.files += %w( src/core/support/thd_posix.c )
+  s.files += %w( src/core/support/thd_win32.c )
+  s.files += %w( src/core/support/time.c )
+  s.files += %w( src/core/support/time_posix.c )
+  s.files += %w( src/core/support/time_precise.c )
+  s.files += %w( src/core/support/time_win32.c )
+  s.files += %w( src/core/support/tls_pthread.c )
+  s.files += %w( include/grpc/grpc_security.h )
+  s.files += %w( include/grpc/byte_buffer.h )
+  s.files += %w( include/grpc/byte_buffer_reader.h )
+  s.files += %w( include/grpc/compression.h )
+  s.files += %w( include/grpc/grpc.h )
+  s.files += %w( include/grpc/status.h )
+  s.files += %w( include/grpc/census.h )
+  s.files += %w( src/core/security/auth_filters.h )
+  s.files += %w( src/core/security/base64.h )
+  s.files += %w( src/core/security/credentials.h )
+  s.files += %w( src/core/security/handshake.h )
+  s.files += %w( src/core/security/json_token.h )
+  s.files += %w( src/core/security/jwt_verifier.h )
+  s.files += %w( src/core/security/secure_endpoint.h )
+  s.files += %w( src/core/security/security_connector.h )
+  s.files += %w( src/core/security/security_context.h )
+  s.files += %w( src/core/tsi/fake_transport_security.h )
+  s.files += %w( src/core/tsi/ssl_transport_security.h )
+  s.files += %w( src/core/tsi/ssl_types.h )
+  s.files += %w( src/core/tsi/transport_security.h )
+  s.files += %w( src/core/tsi/transport_security_interface.h )
+  s.files += %w( src/core/census/grpc_filter.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/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 )
+  s.files += %w( src/core/channel/http_client_filter.h )
+  s.files += %w( src/core/channel/http_server_filter.h )
+  s.files += %w( src/core/channel/subchannel_call_holder.h )
+  s.files += %w( src/core/client_config/client_config.h )
+  s.files += %w( src/core/client_config/connector.h )
+  s.files += %w( src/core/client_config/initial_connect_string.h )
+  s.files += %w( src/core/client_config/lb_policies/pick_first.h )
+  s.files += %w( src/core/client_config/lb_policies/round_robin.h )
+  s.files += %w( src/core/client_config/lb_policy.h )
+  s.files += %w( src/core/client_config/lb_policy_factory.h )
+  s.files += %w( src/core/client_config/lb_policy_registry.h )
+  s.files += %w( src/core/client_config/resolver.h )
+  s.files += %w( src/core/client_config/resolver_factory.h )
+  s.files += %w( src/core/client_config/resolver_registry.h )
+  s.files += %w( src/core/client_config/resolvers/dns_resolver.h )
+  s.files += %w( src/core/client_config/resolvers/sockaddr_resolver.h )
+  s.files += %w( src/core/client_config/subchannel.h )
+  s.files += %w( src/core/client_config/subchannel_factory.h )
+  s.files += %w( src/core/client_config/uri_parser.h )
+  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/iomgr/closure.h )
+  s.files += %w( src/core/iomgr/endpoint.h )
+  s.files += %w( src/core/iomgr/endpoint_pair.h )
+  s.files += %w( src/core/iomgr/exec_ctx.h )
+  s.files += %w( src/core/iomgr/executor.h )
+  s.files += %w( src/core/iomgr/fd_posix.h )
+  s.files += %w( src/core/iomgr/iocp_windows.h )
+  s.files += %w( src/core/iomgr/iomgr.h )
+  s.files += %w( src/core/iomgr/iomgr_internal.h )
+  s.files += %w( src/core/iomgr/iomgr_posix.h )
+  s.files += %w( src/core/iomgr/pollset.h )
+  s.files += %w( src/core/iomgr/pollset_posix.h )
+  s.files += %w( src/core/iomgr/pollset_set.h )
+  s.files += %w( src/core/iomgr/pollset_set_posix.h )
+  s.files += %w( src/core/iomgr/pollset_set_windows.h )
+  s.files += %w( src/core/iomgr/pollset_windows.h )
+  s.files += %w( src/core/iomgr/resolve_address.h )
+  s.files += %w( src/core/iomgr/sockaddr.h )
+  s.files += %w( src/core/iomgr/sockaddr_posix.h )
+  s.files += %w( src/core/iomgr/sockaddr_utils.h )
+  s.files += %w( src/core/iomgr/sockaddr_win32.h )
+  s.files += %w( src/core/iomgr/socket_utils_posix.h )
+  s.files += %w( src/core/iomgr/socket_windows.h )
+  s.files += %w( src/core/iomgr/tcp_client.h )
+  s.files += %w( src/core/iomgr/tcp_posix.h )
+  s.files += %w( src/core/iomgr/tcp_server.h )
+  s.files += %w( src/core/iomgr/tcp_windows.h )
+  s.files += %w( src/core/iomgr/time_averaged_stats.h )
+  s.files += %w( src/core/iomgr/timer.h )
+  s.files += %w( src/core/iomgr/timer_heap.h )
+  s.files += %w( src/core/iomgr/timer_internal.h )
+  s.files += %w( src/core/iomgr/udp_server.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 )
+  s.files += %w( src/core/iomgr/workqueue_posix.h )
+  s.files += %w( src/core/iomgr/workqueue_windows.h )
+  s.files += %w( src/core/json/json.h )
+  s.files += %w( src/core/json/json_common.h )
+  s.files += %w( src/core/json/json_reader.h )
+  s.files += %w( src/core/json/json_writer.h )
+  s.files += %w( src/core/statistics/census_interface.h )
+  s.files += %w( src/core/statistics/census_rpc_stats.h )
+  s.files += %w( src/core/surface/api_trace.h )
+  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/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/server.h )
+  s.files += %w( src/core/surface/surface_trace.h )
+  s.files += %w( src/core/transport/byte_stream.h )
+  s.files += %w( src/core/transport/chttp2/alpn.h )
+  s.files += %w( src/core/transport/chttp2/bin_encoder.h )
+  s.files += %w( src/core/transport/chttp2/frame.h )
+  s.files += %w( src/core/transport/chttp2/frame_data.h )
+  s.files += %w( src/core/transport/chttp2/frame_goaway.h )
+  s.files += %w( src/core/transport/chttp2/frame_ping.h )
+  s.files += %w( src/core/transport/chttp2/frame_rst_stream.h )
+  s.files += %w( src/core/transport/chttp2/frame_settings.h )
+  s.files += %w( src/core/transport/chttp2/frame_window_update.h )
+  s.files += %w( src/core/transport/chttp2/hpack_encoder.h )
+  s.files += %w( src/core/transport/chttp2/hpack_parser.h )
+  s.files += %w( src/core/transport/chttp2/hpack_table.h )
+  s.files += %w( src/core/transport/chttp2/http2_errors.h )
+  s.files += %w( src/core/transport/chttp2/huffsyms.h )
+  s.files += %w( src/core/transport/chttp2/incoming_metadata.h )
+  s.files += %w( src/core/transport/chttp2/internal.h )
+  s.files += %w( src/core/transport/chttp2/status_conversion.h )
+  s.files += %w( src/core/transport/chttp2/stream_map.h )
+  s.files += %w( src/core/transport/chttp2/timeout_encoding.h )
+  s.files += %w( src/core/transport/chttp2/varint.h )
+  s.files += %w( src/core/transport/chttp2_transport.h )
+  s.files += %w( src/core/transport/connectivity_state.h )
+  s.files += %w( src/core/transport/metadata.h )
+  s.files += %w( src/core/transport/metadata_batch.h )
+  s.files += %w( src/core/transport/static_metadata.h )
+  s.files += %w( src/core/transport/transport.h )
+  s.files += %w( src/core/transport/transport_impl.h )
+  s.files += %w( src/core/census/aggregation.h )
+  s.files += %w( src/core/census/context.h )
+  s.files += %w( src/core/census/rpc_metric_id.h )
+  s.files += %w( src/core/httpcli/httpcli_security_connector.c )
+  s.files += %w( src/core/security/base64.c )
+  s.files += %w( src/core/security/client_auth_filter.c )
+  s.files += %w( src/core/security/credentials.c )
+  s.files += %w( src/core/security/credentials_metadata.c )
+  s.files += %w( src/core/security/credentials_posix.c )
+  s.files += %w( src/core/security/credentials_win32.c )
+  s.files += %w( src/core/security/google_default_credentials.c )
+  s.files += %w( src/core/security/handshake.c )
+  s.files += %w( src/core/security/json_token.c )
+  s.files += %w( src/core/security/jwt_verifier.c )
+  s.files += %w( src/core/security/secure_endpoint.c )
+  s.files += %w( src/core/security/security_connector.c )
+  s.files += %w( src/core/security/security_context.c )
+  s.files += %w( src/core/security/server_auth_filter.c )
+  s.files += %w( src/core/security/server_secure_chttp2.c )
+  s.files += %w( src/core/surface/init_secure.c )
+  s.files += %w( src/core/surface/secure_channel_create.c )
+  s.files += %w( src/core/tsi/fake_transport_security.c )
+  s.files += %w( src/core/tsi/ssl_transport_security.c )
+  s.files += %w( src/core/tsi/transport_security.c )
+  s.files += %w( src/core/census/grpc_context.c )
+  s.files += %w( src/core/census/grpc_filter.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/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 )
+  s.files += %w( src/core/channel/http_server_filter.c )
+  s.files += %w( src/core/channel/subchannel_call_holder.c )
+  s.files += %w( src/core/client_config/client_config.c )
+  s.files += %w( src/core/client_config/connector.c )
+  s.files += %w( src/core/client_config/default_initial_connect_string.c )
+  s.files += %w( src/core/client_config/initial_connect_string.c )
+  s.files += %w( src/core/client_config/lb_policies/pick_first.c )
+  s.files += %w( src/core/client_config/lb_policies/round_robin.c )
+  s.files += %w( src/core/client_config/lb_policy.c )
+  s.files += %w( src/core/client_config/lb_policy_factory.c )
+  s.files += %w( src/core/client_config/lb_policy_registry.c )
+  s.files += %w( src/core/client_config/resolver.c )
+  s.files += %w( src/core/client_config/resolver_factory.c )
+  s.files += %w( src/core/client_config/resolver_registry.c )
+  s.files += %w( src/core/client_config/resolvers/dns_resolver.c )
+  s.files += %w( src/core/client_config/resolvers/sockaddr_resolver.c )
+  s.files += %w( src/core/client_config/subchannel.c )
+  s.files += %w( src/core/client_config/subchannel_factory.c )
+  s.files += %w( src/core/client_config/uri_parser.c )
+  s.files += %w( src/core/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/iomgr/closure.c )
+  s.files += %w( src/core/iomgr/endpoint.c )
+  s.files += %w( src/core/iomgr/endpoint_pair_posix.c )
+  s.files += %w( src/core/iomgr/endpoint_pair_windows.c )
+  s.files += %w( src/core/iomgr/exec_ctx.c )
+  s.files += %w( src/core/iomgr/executor.c )
+  s.files += %w( src/core/iomgr/fd_posix.c )
+  s.files += %w( src/core/iomgr/iocp_windows.c )
+  s.files += %w( src/core/iomgr/iomgr.c )
+  s.files += %w( src/core/iomgr/iomgr_posix.c )
+  s.files += %w( src/core/iomgr/iomgr_windows.c )
+  s.files += %w( src/core/iomgr/pollset_multipoller_with_epoll.c )
+  s.files += %w( src/core/iomgr/pollset_multipoller_with_poll_posix.c )
+  s.files += %w( src/core/iomgr/pollset_posix.c )
+  s.files += %w( src/core/iomgr/pollset_set_posix.c )
+  s.files += %w( src/core/iomgr/pollset_set_windows.c )
+  s.files += %w( src/core/iomgr/pollset_windows.c )
+  s.files += %w( src/core/iomgr/resolve_address_posix.c )
+  s.files += %w( src/core/iomgr/resolve_address_windows.c )
+  s.files += %w( src/core/iomgr/sockaddr_utils.c )
+  s.files += %w( src/core/iomgr/socket_utils_common_posix.c )
+  s.files += %w( src/core/iomgr/socket_utils_linux.c )
+  s.files += %w( src/core/iomgr/socket_utils_posix.c )
+  s.files += %w( src/core/iomgr/socket_windows.c )
+  s.files += %w( src/core/iomgr/tcp_client_posix.c )
+  s.files += %w( src/core/iomgr/tcp_client_windows.c )
+  s.files += %w( src/core/iomgr/tcp_posix.c )
+  s.files += %w( src/core/iomgr/tcp_server_posix.c )
+  s.files += %w( src/core/iomgr/tcp_server_windows.c )
+  s.files += %w( src/core/iomgr/tcp_windows.c )
+  s.files += %w( src/core/iomgr/time_averaged_stats.c )
+  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/wakeup_fd_eventfd.c )
+  s.files += %w( src/core/iomgr/wakeup_fd_nospecial.c )
+  s.files += %w( src/core/iomgr/wakeup_fd_pipe.c )
+  s.files += %w( src/core/iomgr/wakeup_fd_posix.c )
+  s.files += %w( src/core/iomgr/workqueue_posix.c )
+  s.files += %w( src/core/iomgr/workqueue_windows.c )
+  s.files += %w( src/core/json/json.c )
+  s.files += %w( src/core/json/json_reader.c )
+  s.files += %w( src/core/json/json_string.c )
+  s.files += %w( src/core/json/json_writer.c )
+  s.files += %w( src/core/surface/api_trace.c )
+  s.files += %w( src/core/surface/byte_buffer.c )
+  s.files += %w( src/core/surface/byte_buffer_reader.c )
+  s.files += %w( src/core/surface/call.c )
+  s.files += %w( src/core/surface/call_details.c )
+  s.files += %w( src/core/surface/call_log_batch.c )
+  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_ping.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 )
+  s.files += %w( src/core/surface/lame_client.c )
+  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 )
+  s.files += %w( src/core/transport/chttp2/alpn.c )
+  s.files += %w( src/core/transport/chttp2/bin_encoder.c )
+  s.files += %w( src/core/transport/chttp2/frame_data.c )
+  s.files += %w( src/core/transport/chttp2/frame_goaway.c )
+  s.files += %w( src/core/transport/chttp2/frame_ping.c )
+  s.files += %w( src/core/transport/chttp2/frame_rst_stream.c )
+  s.files += %w( src/core/transport/chttp2/frame_settings.c )
+  s.files += %w( src/core/transport/chttp2/frame_window_update.c )
+  s.files += %w( src/core/transport/chttp2/hpack_encoder.c )
+  s.files += %w( src/core/transport/chttp2/hpack_parser.c )
+  s.files += %w( src/core/transport/chttp2/hpack_table.c )
+  s.files += %w( src/core/transport/chttp2/huffsyms.c )
+  s.files += %w( src/core/transport/chttp2/incoming_metadata.c )
+  s.files += %w( src/core/transport/chttp2/parsing.c )
+  s.files += %w( src/core/transport/chttp2/status_conversion.c )
+  s.files += %w( src/core/transport/chttp2/stream_lists.c )
+  s.files += %w( src/core/transport/chttp2/stream_map.c )
+  s.files += %w( src/core/transport/chttp2/timeout_encoding.c )
+  s.files += %w( src/core/transport/chttp2/varint.c )
+  s.files += %w( src/core/transport/chttp2/writing.c )
+  s.files += %w( src/core/transport/chttp2_transport.c )
+  s.files += %w( src/core/transport/connectivity_state.c )
+  s.files += %w( src/core/transport/metadata.c )
+  s.files += %w( src/core/transport/metadata_batch.c )
+  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/census/context.c )
+  s.files += %w( src/core/census/initialize.c )
+  s.files += %w( src/core/census/operation.c )
+  s.files += %w( src/core/census/tracing.c )
+end
diff --git a/include/grpc++/client_context.h b/include/grpc++/client_context.h
index 28aca75ff3f43d813bccc58729a8a81a56f56510..4e8776e3beb6a3ad55166393f4295e46ba0820fb 100644
--- a/include/grpc++/client_context.h
+++ b/include/grpc++/client_context.h
@@ -244,7 +244,7 @@ class ClientContext {
   /// client’s identity, role, or whether it is authorized to make a particular
   /// call.
   ///
-  /// \see  https://github.com/grpc/grpc/blob/master/doc/grpc-auth-support.md
+  /// \see  http://www.grpc.io/docs/guides/auth.html
   void set_credentials(const std::shared_ptr<CallCredentials>& creds) {
     creds_ = creds;
   }
diff --git a/include/grpc++/generic/async_generic_service.h b/include/grpc++/generic/async_generic_service.h
index 8578d850ffd75aef0f97d0f671c911a27fc5fed1..33045b8d85921a3734a909c5a4fecd08bd98880b 100644
--- a/include/grpc++/generic/async_generic_service.h
+++ b/include/grpc++/generic/async_generic_service.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
@@ -61,6 +61,7 @@ class AsyncGenericService GRPC_FINAL {
   // TODO(yangg) Once we can add multiple completion queues to the server
   // in c core, add a CompletionQueue* argument to the ctor here.
   // TODO(yangg) support methods list.
+  AsyncGenericService() : server_(nullptr) {}
   AsyncGenericService(const grpc::string& methods) : server_(nullptr) {}
 
   void RequestCall(GenericServerContext* ctx,
@@ -75,4 +76,4 @@ class AsyncGenericService GRPC_FINAL {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_GENERIC_ASYNC_GENERIC_SERVICE_H
+#endif  // GRPCXX_GENERIC_ASYNC_GENERIC_SERVICE_H
\ No newline at end of file
diff --git a/include/grpc++/security/credentials.h b/include/grpc++/security/credentials.h
index a06dcf14ea564f09d81502d735f9684a708c1cc4..75945fd8e81e122f9192970e37172dfb9b873314 100644
--- a/include/grpc++/security/credentials.h
+++ b/include/grpc++/security/credentials.h
@@ -55,7 +55,7 @@ class SecureCallCredentials;
 /// It can make various assertions, e.g., about the client’s identity, role
 /// for all the calls on that channel.
 ///
-/// \see https://github.com/grpc/grpc/blob/master/doc/grpc-auth-support.md
+/// \see http://www.grpc.io/docs/guides/auth.html
 class ChannelCredentials : public GrpcLibrary {
  public:
   ~ChannelCredentials() GRPC_OVERRIDE;
diff --git a/include/grpc++/support/byte_buffer.h b/include/grpc++/support/byte_buffer.h
index 9d19b0770897300a8e45321540cb75780a82b9d4..84042cbef80e58a214a8889b44ec5fba2fe5da23 100644
--- a/include/grpc++/support/byte_buffer.h
+++ b/include/grpc++/support/byte_buffer.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
@@ -55,8 +55,14 @@ class ByteBuffer GRPC_FINAL {
   /// Construct buffer from \a slices, of which there are \a nslices.
   ByteBuffer(const Slice* slices, size_t nslices);
 
+  /// Constuct a byte buffer by referencing elements of existing buffer
+  /// \a buf. Wrapper of core function grpc_byte_buffer_copy
+  ByteBuffer(const ByteBuffer& buf);
+
   ~ByteBuffer();
 
+  ByteBuffer& operator=(const ByteBuffer&);
+
   /// Dump (read) the buffer contents into \a slices.
   void Dump(std::vector<Slice>* slices) const;
 
@@ -69,9 +75,6 @@ class ByteBuffer GRPC_FINAL {
  private:
   friend class SerializationTraits<ByteBuffer, void>;
 
-  ByteBuffer(const ByteBuffer&);
-  ByteBuffer& operator=(const ByteBuffer&);
-
   // takes ownership
   void set_buffer(grpc_byte_buffer* buf) {
     if (buffer_) {
@@ -104,4 +107,4 @@ class SerializationTraits<ByteBuffer, void> {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_SUPPORT_BYTE_BUFFER_H
+#endif  // GRPCXX_SUPPORT_BYTE_BUFFER_H
\ No newline at end of file
diff --git a/include/grpc++/support/slice.h b/include/grpc++/support/slice.h
index be316e7c940e3932745d8e698eef658e127fceb1..30325ef90bf59952e8dc3f278eceef35c3170ff7 100644
--- a/include/grpc++/support/slice.h
+++ b/include/grpc++/support/slice.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
@@ -39,7 +39,7 @@
 
 namespace grpc {
 
-/// A wrapper around \a grpc_slice.
+/// A wrapper around \a gpr_slice.
 ///
 /// A slice represents a contiguous reference counted array of bytes.
 /// It is cheap to take references to a slice, and it is cheap to create a
@@ -85,4 +85,4 @@ class Slice GRPC_FINAL {
 
 }  // namespace grpc
 
-#endif  // GRPCXX_SUPPORT_SLICE_H
+#endif  // GRPCXX_SUPPORT_SLICE_H
\ No newline at end of file
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index be4c4d2b176a8700cdb5199bda2eedc1a75b6abb..952e86ea49d2904852e74d9ea9320c69ee5997e7 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.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
@@ -715,6 +715,16 @@ void grpc_server_destroy(grpc_server *server);
     thread-safety issues raised by it should not be of concern. */
 int grpc_tracer_set_enabled(const char *name, int enabled);
 
+/** Check whether a metadata key is legal (will be accepted by core) */
+int grpc_header_key_is_legal(const char *key, size_t length);
+
+/** Check whether a non-binary metadata value is legal (will be accepted by
+    core) */
+int grpc_header_nonbin_value_is_legal(const char *value, size_t length);
+
+/** Check whether a metadata key corresponds to a binary value */
+int grpc_is_binary_header(const char *key, size_t length);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/package.json b/package.json
index f39dfc4c7cc9e9b1700803fd2c9edec23c302aeb..e0bbb7d80ffe9c61583d911cde733e4b7e0c3c1d 100644
--- a/package.json
+++ b/package.json
@@ -31,13 +31,13 @@
     "protobufjs": "^4.0.0"
   },
   "devDependencies": {
-    "async": "^0.9.0",
+    "async": "^1.5.0",
     "google-auth-library": "^0.9.2",
     "istanbul": "^0.3.21",
     "jsdoc": "^3.3.2",
     "jshint": "^2.5.0",
     "minimist": "^1.1.0",
-    "mocha": "~1.21.0",
+    "mocha": "^2.3.4",
     "mocha-jenkins-reporter": "^0.1.9",
     "mustache": "^2.0.0",
     "poisson-process": "^0.2.1"
@@ -48,14 +48,401 @@
   "files": [
     "LICENSE",
     "src/node/README.md",
-    "src/node/index.js",
-    "src/node/ext",
     "src/node/health_check",
-    "src/node/src",
-    "src/core",
-    "test/proto",
-    "include",
+    "src/proto",
     "etc",
+    "src/node/ext/byte_buffer.h",
+    "src/node/ext/call.h",
+    "src/node/ext/call_credentials.h",
+    "src/node/ext/channel.h",
+    "src/node/ext/channel_credentials.h",
+    "src/node/ext/completion_queue_async_worker.h",
+    "src/node/ext/server.h",
+    "src/node/ext/server_credentials.h",
+    "src/node/ext/timeval.h",
+    "src/node/ext/byte_buffer.cc",
+    "src/node/ext/call.cc",
+    "src/node/ext/call_credentials.cc",
+    "src/node/ext/channel.cc",
+    "src/node/ext/channel_credentials.cc",
+    "src/node/ext/completion_queue_async_worker.cc",
+    "src/node/ext/node_grpc.cc",
+    "src/node/ext/server.cc",
+    "src/node/ext/server_credentials.cc",
+    "src/node/ext/timeval.cc",
+    "src/node/index.js",
+    "src/node/src/client.js",
+    "src/node/src/common.js",
+    "src/node/src/credentials.js",
+    "src/node/src/metadata.js",
+    "src/node/src/server.js",
+    "include/grpc/grpc_security.h",
+    "include/grpc/byte_buffer.h",
+    "include/grpc/byte_buffer_reader.h",
+    "include/grpc/compression.h",
+    "include/grpc/grpc.h",
+    "include/grpc/status.h",
+    "include/grpc/census.h",
+    "src/core/security/auth_filters.h",
+    "src/core/security/base64.h",
+    "src/core/security/credentials.h",
+    "src/core/security/handshake.h",
+    "src/core/security/json_token.h",
+    "src/core/security/jwt_verifier.h",
+    "src/core/security/secure_endpoint.h",
+    "src/core/security/security_connector.h",
+    "src/core/security/security_context.h",
+    "src/core/tsi/fake_transport_security.h",
+    "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
+    "src/core/tsi/transport_security.h",
+    "src/core/tsi/transport_security_interface.h",
+    "src/core/census/grpc_filter.h",
+    "src/core/channel/channel_args.h",
+    "src/core/channel/channel_stack.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",
+    "src/core/channel/http_client_filter.h",
+    "src/core/channel/http_server_filter.h",
+    "src/core/channel/subchannel_call_holder.h",
+    "src/core/client_config/client_config.h",
+    "src/core/client_config/connector.h",
+    "src/core/client_config/initial_connect_string.h",
+    "src/core/client_config/lb_policies/pick_first.h",
+    "src/core/client_config/lb_policies/round_robin.h",
+    "src/core/client_config/lb_policy.h",
+    "src/core/client_config/lb_policy_factory.h",
+    "src/core/client_config/lb_policy_registry.h",
+    "src/core/client_config/resolver.h",
+    "src/core/client_config/resolver_factory.h",
+    "src/core/client_config/resolver_registry.h",
+    "src/core/client_config/resolvers/dns_resolver.h",
+    "src/core/client_config/resolvers/sockaddr_resolver.h",
+    "src/core/client_config/subchannel.h",
+    "src/core/client_config/subchannel_factory.h",
+    "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/iomgr/closure.h",
+    "src/core/iomgr/endpoint.h",
+    "src/core/iomgr/endpoint_pair.h",
+    "src/core/iomgr/exec_ctx.h",
+    "src/core/iomgr/executor.h",
+    "src/core/iomgr/fd_posix.h",
+    "src/core/iomgr/iocp_windows.h",
+    "src/core/iomgr/iomgr.h",
+    "src/core/iomgr/iomgr_internal.h",
+    "src/core/iomgr/iomgr_posix.h",
+    "src/core/iomgr/pollset.h",
+    "src/core/iomgr/pollset_posix.h",
+    "src/core/iomgr/pollset_set.h",
+    "src/core/iomgr/pollset_set_posix.h",
+    "src/core/iomgr/pollset_set_windows.h",
+    "src/core/iomgr/pollset_windows.h",
+    "src/core/iomgr/resolve_address.h",
+    "src/core/iomgr/sockaddr.h",
+    "src/core/iomgr/sockaddr_posix.h",
+    "src/core/iomgr/sockaddr_utils.h",
+    "src/core/iomgr/sockaddr_win32.h",
+    "src/core/iomgr/socket_utils_posix.h",
+    "src/core/iomgr/socket_windows.h",
+    "src/core/iomgr/tcp_client.h",
+    "src/core/iomgr/tcp_posix.h",
+    "src/core/iomgr/tcp_server.h",
+    "src/core/iomgr/tcp_windows.h",
+    "src/core/iomgr/time_averaged_stats.h",
+    "src/core/iomgr/timer.h",
+    "src/core/iomgr/timer_heap.h",
+    "src/core/iomgr/timer_internal.h",
+    "src/core/iomgr/udp_server.h",
+    "src/core/iomgr/wakeup_fd_pipe.h",
+    "src/core/iomgr/wakeup_fd_posix.h",
+    "src/core/iomgr/workqueue.h",
+    "src/core/iomgr/workqueue_posix.h",
+    "src/core/iomgr/workqueue_windows.h",
+    "src/core/json/json.h",
+    "src/core/json/json_common.h",
+    "src/core/json/json_reader.h",
+    "src/core/json/json_writer.h",
+    "src/core/statistics/census_interface.h",
+    "src/core/statistics/census_rpc_stats.h",
+    "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/completion_queue.h",
+    "src/core/surface/event_string.h",
+    "src/core/surface/init.h",
+    "src/core/surface/server.h",
+    "src/core/surface/surface_trace.h",
+    "src/core/transport/byte_stream.h",
+    "src/core/transport/chttp2/alpn.h",
+    "src/core/transport/chttp2/bin_encoder.h",
+    "src/core/transport/chttp2/frame.h",
+    "src/core/transport/chttp2/frame_data.h",
+    "src/core/transport/chttp2/frame_goaway.h",
+    "src/core/transport/chttp2/frame_ping.h",
+    "src/core/transport/chttp2/frame_rst_stream.h",
+    "src/core/transport/chttp2/frame_settings.h",
+    "src/core/transport/chttp2/frame_window_update.h",
+    "src/core/transport/chttp2/hpack_encoder.h",
+    "src/core/transport/chttp2/hpack_parser.h",
+    "src/core/transport/chttp2/hpack_table.h",
+    "src/core/transport/chttp2/http2_errors.h",
+    "src/core/transport/chttp2/huffsyms.h",
+    "src/core/transport/chttp2/incoming_metadata.h",
+    "src/core/transport/chttp2/internal.h",
+    "src/core/transport/chttp2/status_conversion.h",
+    "src/core/transport/chttp2/stream_map.h",
+    "src/core/transport/chttp2/timeout_encoding.h",
+    "src/core/transport/chttp2/varint.h",
+    "src/core/transport/chttp2_transport.h",
+    "src/core/transport/connectivity_state.h",
+    "src/core/transport/metadata.h",
+    "src/core/transport/metadata_batch.h",
+    "src/core/transport/static_metadata.h",
+    "src/core/transport/transport.h",
+    "src/core/transport/transport_impl.h",
+    "src/core/census/aggregation.h",
+    "src/core/census/context.h",
+    "src/core/census/rpc_metric_id.h",
+    "src/core/httpcli/httpcli_security_connector.c",
+    "src/core/security/base64.c",
+    "src/core/security/client_auth_filter.c",
+    "src/core/security/credentials.c",
+    "src/core/security/credentials_metadata.c",
+    "src/core/security/credentials_posix.c",
+    "src/core/security/credentials_win32.c",
+    "src/core/security/google_default_credentials.c",
+    "src/core/security/handshake.c",
+    "src/core/security/json_token.c",
+    "src/core/security/jwt_verifier.c",
+    "src/core/security/secure_endpoint.c",
+    "src/core/security/security_connector.c",
+    "src/core/security/security_context.c",
+    "src/core/security/server_auth_filter.c",
+    "src/core/security/server_secure_chttp2.c",
+    "src/core/surface/init_secure.c",
+    "src/core/surface/secure_channel_create.c",
+    "src/core/tsi/fake_transport_security.c",
+    "src/core/tsi/ssl_transport_security.c",
+    "src/core/tsi/transport_security.c",
+    "src/core/census/grpc_context.c",
+    "src/core/census/grpc_filter.c",
+    "src/core/channel/channel_args.c",
+    "src/core/channel/channel_stack.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",
+    "src/core/channel/http_server_filter.c",
+    "src/core/channel/subchannel_call_holder.c",
+    "src/core/client_config/client_config.c",
+    "src/core/client_config/connector.c",
+    "src/core/client_config/default_initial_connect_string.c",
+    "src/core/client_config/initial_connect_string.c",
+    "src/core/client_config/lb_policies/pick_first.c",
+    "src/core/client_config/lb_policies/round_robin.c",
+    "src/core/client_config/lb_policy.c",
+    "src/core/client_config/lb_policy_factory.c",
+    "src/core/client_config/lb_policy_registry.c",
+    "src/core/client_config/resolver.c",
+    "src/core/client_config/resolver_factory.c",
+    "src/core/client_config/resolver_registry.c",
+    "src/core/client_config/resolvers/dns_resolver.c",
+    "src/core/client_config/resolvers/sockaddr_resolver.c",
+    "src/core/client_config/subchannel.c",
+    "src/core/client_config/subchannel_factory.c",
+    "src/core/client_config/uri_parser.c",
+    "src/core/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/iomgr/closure.c",
+    "src/core/iomgr/endpoint.c",
+    "src/core/iomgr/endpoint_pair_posix.c",
+    "src/core/iomgr/endpoint_pair_windows.c",
+    "src/core/iomgr/exec_ctx.c",
+    "src/core/iomgr/executor.c",
+    "src/core/iomgr/fd_posix.c",
+    "src/core/iomgr/iocp_windows.c",
+    "src/core/iomgr/iomgr.c",
+    "src/core/iomgr/iomgr_posix.c",
+    "src/core/iomgr/iomgr_windows.c",
+    "src/core/iomgr/pollset_multipoller_with_epoll.c",
+    "src/core/iomgr/pollset_multipoller_with_poll_posix.c",
+    "src/core/iomgr/pollset_posix.c",
+    "src/core/iomgr/pollset_set_posix.c",
+    "src/core/iomgr/pollset_set_windows.c",
+    "src/core/iomgr/pollset_windows.c",
+    "src/core/iomgr/resolve_address_posix.c",
+    "src/core/iomgr/resolve_address_windows.c",
+    "src/core/iomgr/sockaddr_utils.c",
+    "src/core/iomgr/socket_utils_common_posix.c",
+    "src/core/iomgr/socket_utils_linux.c",
+    "src/core/iomgr/socket_utils_posix.c",
+    "src/core/iomgr/socket_windows.c",
+    "src/core/iomgr/tcp_client_posix.c",
+    "src/core/iomgr/tcp_client_windows.c",
+    "src/core/iomgr/tcp_posix.c",
+    "src/core/iomgr/tcp_server_posix.c",
+    "src/core/iomgr/tcp_server_windows.c",
+    "src/core/iomgr/tcp_windows.c",
+    "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/wakeup_fd_eventfd.c",
+    "src/core/iomgr/wakeup_fd_nospecial.c",
+    "src/core/iomgr/wakeup_fd_pipe.c",
+    "src/core/iomgr/wakeup_fd_posix.c",
+    "src/core/iomgr/workqueue_posix.c",
+    "src/core/iomgr/workqueue_windows.c",
+    "src/core/json/json.c",
+    "src/core/json/json_reader.c",
+    "src/core/json/json_string.c",
+    "src/core/json/json_writer.c",
+    "src/core/surface/api_trace.c",
+    "src/core/surface/byte_buffer.c",
+    "src/core/surface/byte_buffer_reader.c",
+    "src/core/surface/call.c",
+    "src/core/surface/call_details.c",
+    "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_ping.c",
+    "src/core/surface/completion_queue.c",
+    "src/core/surface/event_string.c",
+    "src/core/surface/init.c",
+    "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",
+    "src/core/transport/chttp2/alpn.c",
+    "src/core/transport/chttp2/bin_encoder.c",
+    "src/core/transport/chttp2/frame_data.c",
+    "src/core/transport/chttp2/frame_goaway.c",
+    "src/core/transport/chttp2/frame_ping.c",
+    "src/core/transport/chttp2/frame_rst_stream.c",
+    "src/core/transport/chttp2/frame_settings.c",
+    "src/core/transport/chttp2/frame_window_update.c",
+    "src/core/transport/chttp2/hpack_encoder.c",
+    "src/core/transport/chttp2/hpack_parser.c",
+    "src/core/transport/chttp2/hpack_table.c",
+    "src/core/transport/chttp2/huffsyms.c",
+    "src/core/transport/chttp2/incoming_metadata.c",
+    "src/core/transport/chttp2/parsing.c",
+    "src/core/transport/chttp2/status_conversion.c",
+    "src/core/transport/chttp2/stream_lists.c",
+    "src/core/transport/chttp2/stream_map.c",
+    "src/core/transport/chttp2/timeout_encoding.c",
+    "src/core/transport/chttp2/varint.c",
+    "src/core/transport/chttp2/writing.c",
+    "src/core/transport/chttp2_transport.c",
+    "src/core/transport/connectivity_state.c",
+    "src/core/transport/metadata.c",
+    "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/census/context.c",
+    "src/core/census/initialize.c",
+    "src/core/census/operation.c",
+    "src/core/census/tracing.c",
+    "include/grpc/support/alloc.h",
+    "include/grpc/support/atm.h",
+    "include/grpc/support/atm_gcc_atomic.h",
+    "include/grpc/support/atm_gcc_sync.h",
+    "include/grpc/support/atm_win32.h",
+    "include/grpc/support/avl.h",
+    "include/grpc/support/cmdline.h",
+    "include/grpc/support/cpu.h",
+    "include/grpc/support/histogram.h",
+    "include/grpc/support/host_port.h",
+    "include/grpc/support/log.h",
+    "include/grpc/support/log_win32.h",
+    "include/grpc/support/port_platform.h",
+    "include/grpc/support/slice.h",
+    "include/grpc/support/slice_buffer.h",
+    "include/grpc/support/string_util.h",
+    "include/grpc/support/subprocess.h",
+    "include/grpc/support/sync.h",
+    "include/grpc/support/sync_generic.h",
+    "include/grpc/support/sync_posix.h",
+    "include/grpc/support/sync_win32.h",
+    "include/grpc/support/thd.h",
+    "include/grpc/support/time.h",
+    "include/grpc/support/tls.h",
+    "include/grpc/support/tls_gcc.h",
+    "include/grpc/support/tls_msvc.h",
+    "include/grpc/support/tls_pthread.h",
+    "include/grpc/support/useful.h",
+    "src/core/profiling/timers.h",
+    "src/core/support/block_annotate.h",
+    "src/core/support/env.h",
+    "src/core/support/file.h",
+    "src/core/support/murmur_hash.h",
+    "src/core/support/stack_lockfree.h",
+    "src/core/support/string.h",
+    "src/core/support/string_win32.h",
+    "src/core/support/thd_internal.h",
+    "src/core/support/time_precise.h",
+    "src/core/profiling/basic_timers.c",
+    "src/core/profiling/stap_timers.c",
+    "src/core/support/alloc.c",
+    "src/core/support/avl.c",
+    "src/core/support/cmdline.c",
+    "src/core/support/cpu_iphone.c",
+    "src/core/support/cpu_linux.c",
+    "src/core/support/cpu_posix.c",
+    "src/core/support/cpu_windows.c",
+    "src/core/support/env_linux.c",
+    "src/core/support/env_posix.c",
+    "src/core/support/env_win32.c",
+    "src/core/support/file.c",
+    "src/core/support/file_posix.c",
+    "src/core/support/file_win32.c",
+    "src/core/support/histogram.c",
+    "src/core/support/host_port.c",
+    "src/core/support/log.c",
+    "src/core/support/log_android.c",
+    "src/core/support/log_linux.c",
+    "src/core/support/log_posix.c",
+    "src/core/support/log_win32.c",
+    "src/core/support/murmur_hash.c",
+    "src/core/support/slice.c",
+    "src/core/support/slice_buffer.c",
+    "src/core/support/stack_lockfree.c",
+    "src/core/support/string.c",
+    "src/core/support/string_posix.c",
+    "src/core/support/string_win32.c",
+    "src/core/support/subprocess_posix.c",
+    "src/core/support/sync.c",
+    "src/core/support/sync_posix.c",
+    "src/core/support/sync_win32.c",
+    "src/core/support/thd.c",
+    "src/core/support/thd_posix.c",
+    "src/core/support/thd_win32.c",
+    "src/core/support/time.c",
+    "src/core/support/time_posix.c",
+    "src/core/support/time_precise.c",
+    "src/core/support/time_win32.c",
+    "src/core/support/tls_pthread.c",
     "binding.gyp"
   ],
   "main": "src/node/index.js",
diff --git a/setup.py b/setup.py
index 93b1a3ae473e2d1a7504bbf7882a714222ee3a28..b70fab33987bcf96194939dd429043f8a663b39c 100644
--- a/setup.py
+++ b/setup.py
@@ -54,6 +54,8 @@ sys.path.insert(0, PYTHON_STEM)
 import commands
 import grpc_core_dependencies
 
+LICENSE = '3-clause BSD'
+
 # Environment variable to determine whether or not the Cython extension should
 # *use* Cython or use the generated C files. Note that this requires the C files
 # to have been generated by building first *with* Cython support.
@@ -79,15 +81,10 @@ EXTENSION_LIBRARIES = ()
 if not "darwin" in sys.platform:
     EXTENSION_LIBRARIES += ('rt',)
 
-EXTRA_COMPILE_ARGS = ()
-if not "win" in sys.platform:
-  EXTRA_COMPILE_ARGS = ('-pthread',)
-
 DEFINE_MACROS = (('OPENSSL_NO_ASM', 1),)
 
 def cython_extensions(package_names, module_names, include_dirs, libraries,
-                      define_macros, extra_compile_args,
-                      build_with_cython=False):
+                      define_macros, build_with_cython=False):
   if ENABLE_CYTHON_TRACING:
     define_macros = define_macros + [('CYTHON_TRACE_NOGIL', 1)]
   file_extension = 'pyx' if build_with_cython else 'c'
@@ -99,7 +96,6 @@ def cython_extensions(package_names, module_names, include_dirs, libraries,
           name=module_name,
           sources=[module_file] + grpc_core_dependencies.CORE_SOURCE_FILES,
           include_dirs=include_dirs, libraries=libraries,
-          extra_compile_args=extra_compile_args,
           define_macros=define_macros,
       ) for (module_name, module_file) in zip(module_names, module_files)
   ]
@@ -115,7 +111,7 @@ def cython_extensions(package_names, module_names, include_dirs, libraries,
 CYTHON_EXTENSION_MODULES = cython_extensions(
     list(CYTHON_EXTENSION_PACKAGE_NAMES), list(CYTHON_EXTENSION_MODULE_NAMES),
     list(EXTENSION_INCLUDE_DIRECTORIES), list(EXTENSION_LIBRARIES),
-    list(DEFINE_MACROS), list(EXTRA_COMPILE_ARGS), bool(BUILD_WITH_CYTHON))
+    list(DEFINE_MACROS), bool(BUILD_WITH_CYTHON))
 
 PACKAGE_DIRECTORIES = {
     '': PYTHON_STEM,
@@ -135,6 +131,7 @@ COMMAND_CLASS = {
     'build_proto_modules': commands.BuildProtoModules,
     'build_project_metadata': commands.BuildProjectMetadata,
     'build_py': commands.BuildPy,
+    'build_ext': commands.BuildExt,
     'gather': commands.Gather,
     'run_interop': commands.RunInterop,
 }
@@ -186,7 +183,8 @@ else:
 
 setuptools.setup(
     name='grpcio',
-    version='0.12.0b1',
+    version='0.12.0b5',
+    license=LICENSE,
     ext_modules=CYTHON_EXTENSION_MODULES,
     packages=list(PACKAGES),
     package_dir=PACKAGE_DIRECTORIES,
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index b1ba2afa8b4e3e4b85da145d27f3e30a6900cb64..880666bb386a567976e7bda0ffd5190ce32e7e22 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.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
@@ -37,6 +37,7 @@
 #include <string.h>
 
 #include <grpc/compression.h>
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -562,12 +563,16 @@ static int prepare_application_metadata(grpc_call *call, int count,
     GPR_ASSERT(sizeof(grpc_linked_mdelem) == sizeof(md->internal_data));
     l->md = grpc_mdelem_from_string_and_buffer(
         md->key, (const uint8_t *)md->value, md->value_length);
-    if (!grpc_mdstr_is_legal_header(l->md->key)) {
+    if (!grpc_header_key_is_legal(grpc_mdstr_as_c_string(l->md->key),
+                                  GRPC_MDSTR_LENGTH(l->md->key))) {
       gpr_log(GPR_ERROR, "attempt to send invalid metadata key: %s",
               grpc_mdstr_as_c_string(l->md->key));
       return 0;
-    } else if (!grpc_mdstr_is_bin_suffixed(l->md->key) &&
-               !grpc_mdstr_is_legal_nonbin_header(l->md->value)) {
+    } else if (!grpc_is_binary_header(grpc_mdstr_as_c_string(l->md->key),
+                                      GRPC_MDSTR_LENGTH(l->md->key)) &&
+               !grpc_header_nonbin_value_is_legal(
+                   grpc_mdstr_as_c_string(l->md->value),
+                   GRPC_MDSTR_LENGTH(l->md->value))) {
       gpr_log(GPR_ERROR, "attempt to send invalid metadata value");
       return 0;
     }
diff --git a/src/core/surface/validate_metadata.c b/src/core/surface/validate_metadata.c
new file mode 100644
index 0000000000000000000000000000000000000000..df2e80b4b78cdf35a401fd475bfd6f10ad182a77
--- /dev/null
+++ b/src/core/surface/validate_metadata.c
@@ -0,0 +1,73 @@
+/*
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include <grpc/support/port_platform.h>
+
+static int conforms_to(const char *s, size_t len, const uint8_t *legal_bits) {
+  const char *p = s;
+  const char *e = s + len;
+  for (; p != e; p++) {
+    int idx = *p;
+    int byte = idx / 8;
+    int bit = idx % 8;
+    if ((legal_bits[byte] & (1 << bit)) == 0) return 0;
+  }
+  return 1;
+}
+
+int grpc_header_key_is_legal(const char *key, size_t length) {
+  static const uint8_t legal_header_bits[256 / 8] = {
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xff, 0x03, 0x00, 0x00, 0x00,
+      0x80, 0xfe, 0xff, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+  if (length == 0) {
+    return 0;
+  }
+  return conforms_to(key, length, legal_header_bits);
+}
+
+int grpc_header_nonbin_value_is_legal(const char *value, size_t length) {
+  static const uint8_t legal_header_bits[256 / 8] = {
+      0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+      0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+  return conforms_to(value, length, legal_header_bits);
+}
+
+int grpc_is_binary_header(const char *key, size_t length) {
+  if (length < 5) return 0;
+  return 0 == memcmp(key + length - 4, "-bin", 4);
+}
diff --git a/src/core/transport/chttp2/bin_encoder.c b/src/core/transport/chttp2/bin_encoder.c
index a6a8e3e03596c37a858c98ef329396fc6622a8c3..f26bc7e29b14727212872d8d4cb6527869bf25b4 100644
--- a/src/core/transport/chttp2/bin_encoder.c
+++ b/src/core/transport/chttp2/bin_encoder.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
@@ -283,8 +283,3 @@ gpr_slice grpc_chttp2_base64_encode_and_huffman_compress(gpr_slice input) {
   GPR_ASSERT(in == GPR_SLICE_END_PTR(input));
   return output;
 }
-
-int grpc_is_binary_header(const char *key, size_t length) {
-  if (length < 5) return 0;
-  return 0 == memcmp(key + length - 4, "-bin", 4);
-}
diff --git a/src/core/transport/chttp2/bin_encoder.h b/src/core/transport/chttp2/bin_encoder.h
index d3e5a855ddb05cef8380065deda028de8860d28d..036fddf9981e103297cc01ae5a7485051a5c2225 100644
--- a/src/core/transport/chttp2/bin_encoder.h
+++ b/src/core/transport/chttp2/bin_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
@@ -51,6 +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);
 
-int grpc_is_binary_header(const char *key, size_t length);
-
 #endif /* GRPC_INTERNAL_CORE_TRANSPORT_CHTTP2_BIN_ENCODER_H */
diff --git a/src/core/transport/chttp2/hpack_encoder.c b/src/core/transport/chttp2/hpack_encoder.c
index d6a352afd58de9767f21d51b0d71afaf48168afd..89a80d896cd59ac47a9f4fde7c2e6df510eb2632 100644
--- a/src/core/transport/chttp2/hpack_encoder.c
+++ b/src/core/transport/chttp2/hpack_encoder.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
@@ -36,6 +36,11 @@
 #include <assert.h>
 #include <string.h>
 
+/* This is here for grpc_is_binary_header
+ * TODO(murgatroid99): Remove this
+ */
+#include <grpc/grpc.h>
+
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
diff --git a/src/core/transport/chttp2/hpack_parser.c b/src/core/transport/chttp2/hpack_parser.c
index 16395d6be165567cdeb8bbda1c68039401fd40e1..a63c7db1f6137114f86bca493179eb3339473f92 100644
--- a/src/core/transport/chttp2/hpack_parser.c
+++ b/src/core/transport/chttp2/hpack_parser.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
@@ -38,6 +38,11 @@
 #include <string.h>
 #include <assert.h>
 
+/* This is here for grpc_is_binary_header
+ * TODO(murgatroid99): Remove this
+ */
+#include <grpc/grpc.h>
+
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
diff --git a/src/core/transport/metadata.c b/src/core/transport/metadata.c
index ada889983c28d11253e45ca51f581f566598daed..a5f0dcbe1cadb3d23f49259708a169cc8b8073ee 100644
--- a/src/core/transport/metadata.c
+++ b/src/core/transport/metadata.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
@@ -687,38 +687,4 @@ gpr_slice grpc_mdstr_as_base64_encoded_and_huffman_compressed(grpc_mdstr *gs) {
   slice = s->base64_and_huffman;
   gpr_mu_unlock(&shard->mu);
   return slice;
-}
-
-static int conforms_to(grpc_mdstr *s, const uint8_t *legal_bits) {
-  const uint8_t *p = GPR_SLICE_START_PTR(s->slice);
-  const uint8_t *e = GPR_SLICE_END_PTR(s->slice);
-  for (; p != e; p++) {
-    int idx = *p;
-    int byte = idx / 8;
-    int bit = idx % 8;
-    if ((legal_bits[byte] & (1 << bit)) == 0) return 0;
-  }
-  return 1;
-}
-
-int grpc_mdstr_is_legal_header(grpc_mdstr *s) {
-  static const uint8_t legal_header_bits[256 / 8] = {
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xff, 0x03, 0x00, 0x00, 0x00,
-      0x80, 0xfe, 0xff, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-  return conforms_to(s, legal_header_bits);
-}
-
-int grpc_mdstr_is_legal_nonbin_header(grpc_mdstr *s) {
-  static const uint8_t legal_header_bits[256 / 8] = {
-      0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-      0xff, 0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-  return conforms_to(s, legal_header_bits);
-}
-
-int grpc_mdstr_is_bin_suffixed(grpc_mdstr *s) {
-  /* TODO(ctiller): consider caching this */
-  return grpc_is_binary_header((const char *)GPR_SLICE_START_PTR(s->slice),
-                               GPR_SLICE_LENGTH(s->slice));
-}
+}
\ No newline at end of file
diff --git a/src/core/transport/metadata.h b/src/core/transport/metadata.h
index a7c9fd6e84cf8e6613d882c61ba663226516318a..3898c3d18eed284793735f73317d777add5a9d0b 100644
--- a/src/core/transport/metadata.h
+++ b/src/core/transport/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
@@ -142,6 +142,8 @@ void grpc_mdelem_unref(grpc_mdelem *md);
    Does not promise that the returned string has no embedded nulls however. */
 const char *grpc_mdstr_as_c_string(grpc_mdstr *s);
 
+#define GRPC_MDSTR_LENGTH(s) (GPR_SLICE_LENGTH(s->slice))
+
 int grpc_mdstr_is_legal_header(grpc_mdstr *s);
 int grpc_mdstr_is_legal_nonbin_header(grpc_mdstr *s);
 int grpc_mdstr_is_bin_suffixed(grpc_mdstr *s);
@@ -151,4 +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_INTERNAL_CORE_TRANSPORT_METADATA_H */
\ No newline at end of file
diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer.cc
index 755234d7e8bfd8eb514ae3d966ec852bc15b41c9..2952f94b2403e3743d87b8d0ed244c91472ad161 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer.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
@@ -69,6 +69,7 @@ void ByteBuffer::Dump(std::vector<Slice>* slices) const {
   while (grpc_byte_buffer_reader_next(&reader, &s)) {
     slices->push_back(Slice(s, Slice::STEAL_REF));
   }
+  grpc_byte_buffer_reader_destroy(&reader);
 }
 
 size_t ByteBuffer::Length() const {
@@ -79,4 +80,13 @@ size_t ByteBuffer::Length() const {
   }
 }
 
+ByteBuffer::ByteBuffer(const ByteBuffer& buf)
+    : buffer_(grpc_byte_buffer_copy(buf.buffer_)) {}
+
+ByteBuffer& ByteBuffer::operator=(const ByteBuffer& buf) {
+  Clear();                                       // first remove existing data
+  buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
+  return *this;
+}
+
 }  // namespace grpc
diff --git a/src/node/ext/call.cc b/src/node/ext/call.cc
index c6e10bc1ffd5d88acc130eabde37d3dfa66ef905..e1fc111e9e352943d4202c68436802f863807880 100644
--- a/src/node/ext/call.cc
+++ b/src/node/ext/call.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
@@ -95,10 +95,6 @@ Local<Value> nanErrorWithCode(const char *msg, grpc_call_error code) {
   return scope.Escape(err);
 }
 
-bool EndsWith(const char *str, const char *substr) {
-  return strcmp(str+strlen(str)-strlen(substr), substr) == 0;
-}
-
 bool CreateMetadataArray(Local<Object> metadata, grpc_metadata_array *array,
                          shared_ptr<Resources> resources) {
   HandleScope scope;
@@ -126,7 +122,7 @@ bool CreateMetadataArray(Local<Object> metadata, grpc_metadata_array *array,
       grpc_metadata *current = &array->metadata[array->count];
       current->key = **utf8_key;
       // Only allow binary headers for "-bin" keys
-      if (EndsWith(current->key, "-bin")) {
+      if (grpc_is_binary_header(current->key, strlen(current->key))) {
         if (::node::Buffer::HasInstance(value)) {
           current->value = ::node::Buffer::Data(value);
           current->value_length = ::node::Buffer::Length(value);
@@ -180,7 +176,7 @@ Local<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
     } else {
       array = Local<Array>::Cast(maybe_array.ToLocalChecked());
     }
-    if (EndsWith(elem->key, "-bin")) {
+    if (grpc_is_binary_header(elem->key, strlen(elem->key))) {
       Nan::Set(array, index_map[elem->key],
                MakeFastBuffer(
                    Nan::CopyBuffer(elem->value,
@@ -777,4 +773,4 @@ NAN_METHOD(Call::SetCredentials) {
 }
 
 }  // namespace node
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/src/node/ext/call_credentials.cc b/src/node/ext/call_credentials.cc
index 8cbfb1ebea0c934d8b10ff968e2b343102005ae3..91acb8625477dbee6b3b81d2a5e7cdcec592b080 100644
--- a/src/node/ext/call_credentials.cc
+++ b/src/node/ext/call_credentials.cc
@@ -32,6 +32,8 @@
  */
 
 #include <node.h>
+#include <nan.h>
+#include <uv.h>
 
 #include "grpc/grpc.h"
 #include "grpc/grpc_security.h"
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 5b5f3c1c5b88321a79267ecf82450fa0ea34e852..a2b8e0d22bf12563cfe5c6428c1b54294a34b194 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.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
@@ -44,6 +44,7 @@
 #include "completion_queue_async_worker.h"
 #include "server_credentials.h"
 
+using v8::FunctionTemplate;
 using v8::Local;
 using v8::Value;
 using v8::Object;
@@ -230,6 +231,40 @@ void InitWriteFlags(Local<Object> exports) {
   Nan::Set(write_flags, Nan::New("NO_COMPRESS").ToLocalChecked(), NO_COMPRESS);
 }
 
+NAN_METHOD(MetadataKeyIsLegal) {
+  if (!info[0]->IsString()) {
+    return Nan::ThrowTypeError(
+        "headerKeyIsLegal's argument must be a string");
+  }
+  Local<String> key = Nan::To<String>(info[0]).ToLocalChecked();
+  char *key_str = *Nan::Utf8String(key);
+  info.GetReturnValue().Set(static_cast<bool>(
+      grpc_header_key_is_legal(key_str, static_cast<size_t>(key->Length()))));
+}
+
+NAN_METHOD(MetadataNonbinValueIsLegal) {
+  if (!info[0]->IsString()) {
+    return Nan::ThrowTypeError(
+        "metadataNonbinValueIsLegal's argument must be a string");
+  }
+  Local<String> value = Nan::To<String>(info[0]).ToLocalChecked();
+  char *value_str = *Nan::Utf8String(value);
+  info.GetReturnValue().Set(static_cast<bool>(
+      grpc_header_nonbin_value_is_legal(
+          value_str, static_cast<size_t>(value->Length()))));
+}
+
+NAN_METHOD(MetadataKeyIsBinary) {
+  if (!info[0]->IsString()) {
+    return Nan::ThrowTypeError(
+        "metadataKeyIsLegal's argument must be a string");
+  }
+  Local<String> key = Nan::To<String>(info[0]).ToLocalChecked();
+  char *key_str = *Nan::Utf8String(key);
+  info.GetReturnValue().Set(static_cast<bool>(
+      grpc_is_binary_header(key_str, static_cast<size_t>(key->Length()))));
+}
+
 void init(Local<Object> exports) {
   Nan::HandleScope scope;
   grpc_init();
@@ -247,6 +282,19 @@ void init(Local<Object> exports) {
   grpc::node::Server::Init(exports);
   grpc::node::CompletionQueueAsyncWorker::Init(exports);
   grpc::node::ServerCredentials::Init(exports);
+
+  // Attach a few utility functions directly to the module
+  Nan::Set(exports, Nan::New("metadataKeyIsLegal").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(MetadataKeyIsLegal)).ToLocalChecked());
+  Nan::Set(exports, Nan::New("metadataNonbinValueIsLegal").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(MetadataNonbinValueIsLegal)
+                            ).ToLocalChecked());
+  Nan::Set(exports, Nan::New("metadataKeyIsBinary").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(MetadataKeyIsBinary)
+                            ).ToLocalChecked());
 }
 
 NODE_MODULE(grpc_node, init)
diff --git a/src/node/ext/timeval.cc b/src/node/ext/timeval.cc
index bf68513c4879087609b749799d7413db159c6206..64015e8412e59a2bf9607ae47ee21b0af9e7c470 100644
--- a/src/node/ext/timeval.cc
+++ b/src/node/ext/timeval.cc
@@ -46,7 +46,7 @@ gpr_timespec MillisecondsToTimespec(double millis) {
   } else if (millis == -std::numeric_limits<double>::infinity()) {
     return gpr_inf_past(GPR_CLOCK_REALTIME);
   } else {
-    return gpr_time_from_micros(static_cast<int64_t>(millis * 1000),
+    return gpr_time_from_micros(static_cast<long>(millis * 1000),
                                 GPR_CLOCK_REALTIME);
   }
 }
diff --git a/src/node/interop/async_delay_queue.js b/src/node/interop/async_delay_queue.js
index 2bd3ca4da3f41e24eb7fc1ccff2cfaffb626834d..b3c30abc8f762dfc160b41e769931507774dc3e6 100644
--- a/src/node/interop/async_delay_queue.js
+++ b/src/node/interop/async_delay_queue.js
@@ -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
@@ -36,8 +36,8 @@
 var _ = require('lodash');
 
 /**
- * This class represents a queue of callbacks that must happen sequentially, each
- * with a specific delay after the previous event.
+ * This class represents a queue of callbacks that must happen sequentially,
+ * each with a specific delay after the previous event.
  */
 function AsyncDelayQueue() {
   this.queue = [];
@@ -76,4 +76,4 @@ AsyncDelayQueue.prototype.add = function(callback, delay) {
   }
 };
 
-module.exports = AsyncDelayQueue;
+module.exports = AsyncDelayQueue;
\ No newline at end of file
diff --git a/src/node/src/metadata.js b/src/node/src/metadata.js
index 0a2f1489b6ead9db26642f983d69a2dec7083f6c..fef79f959e49323e6e5fad04f106324f21678c37 100644
--- a/src/node/src/metadata.js
+++ b/src/node/src/metadata.js
@@ -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
@@ -49,6 +49,8 @@
 
 var _ = require('lodash');
 
+var grpc = require('bindings')('grpc_node');
+
 /**
  * Class for storing metadata. Keys are normalized to lowercase ASCII.
  * @constructor
@@ -58,15 +60,16 @@ function Metadata() {
 }
 
 function normalizeKey(key) {
-  if (!(/^[A-Za-z\d_-]+$/.test(key))) {
-    throw new Error('Metadata keys must be nonempty strings containing only ' +
-        'alphanumeric characters and hyphens');
+  key = key.toLowerCase();
+  if (grpc.metadataKeyIsLegal(key)) {
+    return key;
+  } else {
+    throw new Error('Metadata key contains illegal characters');
   }
-  return key.toLowerCase();
 }
 
 function validate(key, value) {
-  if (_.endsWith(key, '-bin')) {
+  if (grpc.metadataKeyIsBinary(key)) {
     if (!(value instanceof Buffer)) {
       throw new Error('keys that end with \'-bin\' must have Buffer values');
     }
@@ -75,9 +78,8 @@ function validate(key, value) {
       throw new Error(
           'keys that don\'t end with \'-bin\' must have String values');
     }
-    if (!(/^[\x20-\x7E]*$/.test(value))) {
-      throw new Error('Metadata string values can only contain printable ' +
-          'ASCII characters and space');
+    if (!grpc.metadataNonbinValueIsLegal(value)) {
+      throw new Error('Metadata string value contains illegal characters');
     }
   }
 }
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index c9fda4285529294fa002ed43ef80af4d0f86f0b2..7a77ae60b6a99935395365bcfeb42c5f2755ad46 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -241,11 +241,11 @@ DEPRECATED_MSG_ATTRIBUTE("Use NSDictionary or NSMutableDictionary instead.")
 @protocol GRPCRequestHeaders <NSObject>
 @property(nonatomic, readonly) NSUInteger count;
 
-- (id)objectForKeyedSubscript:(NSString *)key;
-- (void)setObject:(id)obj forKeyedSubscript:(NSString *)key;
+- (id)objectForKeyedSubscript:(id)key;
+- (void)setObject:(id)obj forKeyedSubscript:(id)key;
 
 - (void)removeAllObjects;
-- (void)removeObjectForKey:(NSString *)key;
+- (void)removeObjectForKey:(id)key;
 @end
 
 #pragma clang diagnostic push
diff --git a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
index cfccdd453f78cba92885b33543f4a9d1e9686d4d..2f5716082bfb000f0a4d6191279baf86d22b84ed 100644
--- a/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
+++ b/src/objective-c/examples/SwiftSample/SwiftSample.xcodeproj/project.pbxproj
@@ -107,6 +107,7 @@
 				633BFFBF1B950B210007E424 /* Frameworks */,
 				633BFFC01B950B210007E424 /* Resources */,
 				AC2F6F9AB1C090BB0BEE6E4D /* Copy Pods Resources */,
+				A1738A987353B0BF2C64F0F7 /* Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
@@ -123,6 +124,7 @@
 		633BFFBA1B950B210007E424 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				LastSwiftUpdateCheck = 0710;
 				LastUpgradeCheck = 0640;
 				ORGANIZATIONNAME = gRPC;
 				TargetAttributes = {
@@ -177,6 +179,21 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
+		A1738A987353B0BF2C64F0F7 /* Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Embed Pods Frameworks";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
 		AC2F6F9AB1C090BB0BEE6E4D /* Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -310,7 +327,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Bridging-Header.h";
-				USER_HEADER_SEARCH_PATHS = "Pods/**";
+				USER_HEADER_SEARCH_PATHS = "";
 			};
 			name = Debug;
 		};
@@ -323,7 +340,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "Bridging-Header.h";
-				USER_HEADER_SEARCH_PATHS = "Pods/**";
+				USER_HEADER_SEARCH_PATHS = "";
 			};
 			name = Release;
 		};
diff --git a/src/proto/gen_build_yaml.py b/src/proto/gen_build_yaml.py
index 4e959830ea362c6d9f681353961c41ea9f29715b..e243d0defc4b9f67201dd40b941e0399d3466455 100755
--- a/src/proto/gen_build_yaml.py
+++ b/src/proto/gen_build_yaml.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
@@ -36,21 +36,36 @@ import os
 import re
 import sys
 
+def update_deps(key, proto_filename, deps, is_trans, visited):
+  if not proto_filename in visited:
+    visited.append(proto_filename)
+    with open(proto_filename) as inp:
+      for line in inp:
+        imp = re.search(r'import "([^"]*)"', line)
+        if not imp: continue
+        imp_proto = imp.group(1)
+        if key not in deps: deps[key] = []
+        deps[key].append(imp_proto[:-6])
+        if is_trans:
+          update_deps(key, imp_proto, deps, is_trans, visited)
+
 def main():
+  proto_dir = os.path.abspath(os.path.dirname(sys.argv[0]))
+  os.chdir(os.path.join(proto_dir, '../..'))
+
   deps = {}
-  for root, dirs, files in os.walk(os.path.dirname(sys.argv[0])):
+  deps_trans = {}
+  for root, dirs, files in os.walk('src/proto'):
     for f in files:
       if f[-6:] != '.proto': continue
       look_at = os.path.join(root, f)
-      with open(look_at) as inp:
-        for line in inp:
-          imp = re.search(r'import "([^"]*)"', line)
-          if not imp: continue
-          if look_at[:-6] not in deps: deps[look_at[:-6]] = []
-          deps[look_at[:-6]].append(imp.group(1)[:-6])
+      deps_for = look_at[:-6]
+      update_deps(deps_for, look_at, deps, False, [])      # First level deps
+      update_deps(deps_for, look_at, deps_trans, True, []) # Transitive deps
 
   json = {
-    'proto_deps': deps
+    'proto_deps': deps,
+    'proto_transitive_deps': deps_trans
   }
 
   print yaml.dump(json)
diff --git a/src/proto/grpc/testing/duplicate/echo_duplicate.proto b/src/proto/grpc/testing/duplicate/echo_duplicate.proto
index d5891db4ceb7436b29620a54a6841a18f0caec91..9978ca4ac0b6fef2b768acf91840ff0b34800af5 100644
--- a/src/proto/grpc/testing/duplicate/echo_duplicate.proto
+++ b/src/proto/grpc/testing/duplicate/echo_duplicate.proto
@@ -1,5 +1,5 @@
 
-// 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 +36,6 @@ import "src/proto/grpc/testing/echo_messages.proto";
 
 package grpc.testing.duplicate;
 
-service TestService {
+service EchoTestService {
   rpc Echo(grpc.testing.EchoRequest) returns (grpc.testing.EchoResponse);
-}
+}
\ No newline at end of file
diff --git a/src/proto/grpc/testing/echo.proto b/src/proto/grpc/testing/echo.proto
index 0896f50a99f9fb66a99f6bed40c6207459c35649..47d4c26732f729cf7b62b24eb5ca7c712d2de670 100644
--- a/src/proto/grpc/testing/echo.proto
+++ b/src/proto/grpc/testing/echo.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ import "src/proto/grpc/testing/echo_messages.proto";
 
 package grpc.testing;
 
-service TestService {
+service EchoTestService {
   rpc Echo(EchoRequest) returns (EchoResponse);
   rpc RequestStream(stream EchoRequest) returns (EchoResponse);
   rpc ResponseStream(EchoRequest) returns (stream EchoResponse);
@@ -44,4 +44,4 @@ service TestService {
 
 service UnimplementedService {
   rpc Unimplemented(EchoRequest) returns (EchoResponse);
-}
+}
\ No newline at end of file
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 81dab1b51860f91888cc370c7679684283246557..e1a3f4bed3cc9ed74644e69d0aed202261b9a422 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -40,6 +40,17 @@ import setuptools
 from setuptools.command import build_py
 from setuptools.command import test
 
+# Because we need to support building without Cython but simultaneously need to
+# subclass its command class when we need to and because distutils requires a
+# special hook to acquire a command class, we attempt to import Cython's
+# build_ext, and if that fails we import setuptools'.
+try:
+  # Due to the strange way Cython's Distutils module re-imports build_ext, we
+  # import the build_ext class directly.
+  from Cython.Distutils.build_ext import build_ext
+except ImportError:
+  from setuptools.command.build_ext import build_ext
+
 PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
 
 CONF_PY_ADDENDUM = """
@@ -51,6 +62,10 @@ html_theme = 'sphinx_rtd_theme'
 """
 
 
+class CommandError(Exception):
+  """Simple exception class for GRPC custom commands."""
+
+
 class SphinxDocumentation(setuptools.Command):
   """Command to generate documentation via sphinx."""
 
@@ -104,10 +119,10 @@ class BuildProtoModules(setuptools.Command):
 
   def run(self):
     if not self.protoc_command:
-      raise Exception('could not find protoc')
+      raise CommandError('could not find protoc')
     if not self.grpc_python_plugin_command:
-      raise Exception('could not find grpc_python_plugin '
-                      '(protoc plugin for GRPC Python)')
+      raise CommandError('could not find grpc_python_plugin '
+                         '(protoc plugin for GRPC Python)')
     include_regex = re.compile(self.include)
     exclude_regex = re.compile(self.exclude) if self.exclude else None
     paths = []
@@ -130,7 +145,7 @@ class BuildProtoModules(setuptools.Command):
       subprocess.check_output(' '.join(command), cwd=root_directory, shell=True,
                               stderr=subprocess.STDOUT)
     except subprocess.CalledProcessError as e:
-      raise Exception('Command:\n{}\nMessage:\n{}\nOutput:\n{}'.format(
+      raise CommandError('Command:\n{}\nMessage:\n{}\nOutput:\n{}'.format(
           command, e.message, e.output))
 
 
@@ -156,13 +171,34 @@ class BuildPy(build_py.build_py):
   """Custom project build command."""
 
   def run(self):
-    # TODO(atash): make this warn if the proto modules couldn't be built rather
-    # than cause build failure
-    self.run_command('build_proto_modules')
+    try:
+      self.run_command('build_proto_modules')
+    except CommandError as error:
+      sys.stderr.write('warning: %s\n' % error.message)
     self.run_command('build_project_metadata')
     build_py.build_py.run(self)
 
 
+class BuildExt(build_ext):
+  """Custom build_ext command to enable compiler-specific flags."""
+
+  C_OPTIONS = {
+      'unix': ('-pthread', '-std=gnu99'),
+      'msvc': (),
+  }
+  LINK_OPTIONS = {}
+
+  def build_extensions(self):
+    compiler = self.compiler.compiler_type
+    if compiler in BuildExt.C_OPTIONS:
+      for extension in self.extensions:
+        extension.extra_compile_args += list(BuildExt.C_OPTIONS[compiler])
+    if compiler in BuildExt.LINK_OPTIONS:
+      for extension in self.extensions:
+        extension.extra_link_args += list(BuildExt.LINK_OPTIONS[compiler])
+    build_ext.build_extensions(self)
+
+
 class Gather(setuptools.Command):
   """Command to gather project dependencies."""
 
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 63cf0a4c74c36e7b44d57630eb447e75b35df795..952898d74a2c8cf795ab88216aaaeb7efcc99f51 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -188,6 +188,7 @@ CORE_SOURCE_FILES = [
   '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',
   'src/core/transport/chttp2/alpn.c',
diff --git a/src/ruby/.rspec b/src/ruby/.rspec
deleted file mode 100755
index efeee2c1d225a82e21cede9e8ff17f848721a862..0000000000000000000000000000000000000000
--- a/src/ruby/.rspec
+++ /dev/null
@@ -1,6 +0,0 @@
--I.
--Ipb
---backtrace
---require spec_helper
---format documentation
---color
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index db9385e96150b332ee4546f90fac5b29294309c1..018353ce5d8053c8bf549150f5af5dcab3c72e89 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -54,53 +54,30 @@ LIB_DIRS = [
   LIBDIR
 ]
 
-def check_grpc_root
-  grpc_root = ENV['GRPC_ROOT']
-  if grpc_root.nil?
-    r = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
-    grpc_root = r if File.exist?(File.join(r, 'include/grpc/grpc.h'))
-  end
-  grpc_root
-end
+fail 'libdl not found' unless have_library('dl', 'dlopen')
+fail 'zlib not found' unless have_library('z', 'inflate')
+
+grpc_root = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
 
-grpc_pkg_config = system('pkg-config --exists grpc')
+grpc_config = ENV['GRPC_CONFIG'] || 'opt'
 
-if grpc_pkg_config
-  $CFLAGS << ' ' + `pkg-config --static --cflags grpc`.strip + ' '
-  $LDFLAGS << ' ' + `pkg-config --static --libs grpc`.strip + ' '
+if ENV.key?('GRPC_LIB_DIR')
+  grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
 else
-  dir_config('grpc', HEADER_DIRS, LIB_DIRS)
-  fail 'libdl not found' unless have_library('dl', 'dlopen')
-  fail 'zlib not found' unless have_library('z', 'inflate')
-  begin
-    fail 'Fail' unless have_library('gpr', 'gpr_now')
-    fail 'Fail' unless have_library('grpc', 'grpc_channel_destroy')
-  rescue
-    # Check to see if GRPC_ROOT is defined or available
-    grpc_root = check_grpc_root
-
-    # Stop if there is still no grpc_root
-    exit 1 if grpc_root.nil?
-
-    grpc_config = ENV['GRPC_CONFIG'] || 'opt'
-    if ENV.key?('GRPC_LIB_DIR')
-      grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
-    else
-      grpc_lib_dir = File.join(File.join(grpc_root, 'libs'), grpc_config)
-    end
-    unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a'))
-      print "Building internal gRPC\n"
-      system("make -C #{grpc_root} static_c CONFIG=#{grpc_config}")
-    end
-    $CFLAGS << ' -I' + File.join(grpc_root, 'include')
-    $LDFLAGS << ' -L' + grpc_lib_dir
-    if grpc_config == 'gcov'
-      $CFLAGS << ' -O0 -fprofile-arcs -ftest-coverage'
-      $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
-    end
-    raise 'gpr not found' unless have_library('gpr', 'gpr_now')
-    raise 'grpc not found' unless have_library('grpc', 'grpc_channel_destroy')
-  end
+  grpc_lib_dir = File.join(File.join(grpc_root, 'libs'), grpc_config)
+end
+
+unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a'))
+  print "Building internal gRPC\n"
+  system("make -C #{grpc_root} static_c CONFIG=#{grpc_config}")
+end
+
+$CFLAGS << ' -I' + File.join(grpc_root, 'include')
+$LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgrpc.a')
+$LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgpr.a')
+if grpc_config == 'gcov'
+  $CFLAGS << ' -O0 -fprofile-arcs -ftest-coverage'
+  $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
 end
 
 $CFLAGS << ' -std=c99 '
@@ -109,4 +86,7 @@ $CFLAGS << ' -Wextra '
 $CFLAGS << ' -pedantic '
 $CFLAGS << ' -Werror '
 
+$LDFLAGS << ' -lssl '
+$LDFLAGS << ' -lcrypto '
+
 create_makefile('grpc/grpc')
diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index 1647d9b484f8f0d5a1b85a6a954f8773e9c1c63a..43adafb73f9a9a0d7b81e2a99fc73c726c4424f7 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.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
@@ -310,33 +310,61 @@ static int grpc_rb_md_ary_fill_hash_cb(VALUE key, VALUE val, VALUE md_ary_obj) {
   grpc_metadata_array *md_ary = NULL;
   long array_length;
   long i;
+  char *key_str;
+  size_t key_len;
+  char *value_str;
+  size_t value_len;
+
+  if (TYPE(key) == T_SYMBOL) {
+    key_str = (char *)rb_id2name(SYM2ID(key));
+    key_len = strlen(key_str);
+  } else { /* StringValueCStr does all other type exclusions for us */
+    key_str = StringValueCStr(key);
+    key_len = RSTRING_LEN(key);
+  }
+
+  if (!grpc_header_key_is_legal(key_str, key_len)) {
+    rb_raise(rb_eArgError,
+             "'%s' is an invalid header key, must match [a-z0-9-_.]+",
+             key_str);
+    return ST_STOP;
+  }
 
   /* Construct a metadata object from key and value and add it */
   TypedData_Get_Struct(md_ary_obj, grpc_metadata_array,
                        &grpc_rb_md_ary_data_type, md_ary);
 
   if (TYPE(val) == T_ARRAY) {
-    /* If the value is an array, add capacity for each value in the array */
     array_length = RARRAY_LEN(val);
+    /* If the value is an array, add capacity for each value in the array */
     for (i = 0; i < array_length; i++) {
-      if (TYPE(key) == T_SYMBOL) {
-        md_ary->metadata[md_ary->count].key = (char *)rb_id2name(SYM2ID(key));
-      } else { /* StringValueCStr does all other type exclusions for us */
-        md_ary->metadata[md_ary->count].key = StringValueCStr(key);
+      value_str = RSTRING_PTR(rb_ary_entry(val, i));
+      value_len = RSTRING_LEN(rb_ary_entry(val, i));
+      if (!grpc_is_binary_header(key_str, key_len) &&
+          !grpc_header_nonbin_value_is_legal(value_str, value_len)) {
+        // The value has invalid characters
+        rb_raise(rb_eArgError,
+                 "Header value '%s' has invalid characters", value_str);
+        return ST_STOP;
       }
-      md_ary->metadata[md_ary->count].value = RSTRING_PTR(rb_ary_entry(val, i));
-      md_ary->metadata[md_ary->count].value_length =
-          RSTRING_LEN(rb_ary_entry(val, i));
+      md_ary->metadata[md_ary->count].key = key_str;
+      md_ary->metadata[md_ary->count].value = value_str;
+      md_ary->metadata[md_ary->count].value_length = value_len;
       md_ary->count += 1;
     }
   } else {
-    if (TYPE(key) == T_SYMBOL) {
-      md_ary->metadata[md_ary->count].key = (char *)rb_id2name(SYM2ID(key));
-    } else { /* StringValueCStr does all other type exclusions for us */
-      md_ary->metadata[md_ary->count].key = StringValueCStr(key);
+    value_str = RSTRING_PTR(val);
+    value_len = RSTRING_LEN(val);
+    if (!grpc_is_binary_header(key_str, key_len) &&
+        !grpc_header_nonbin_value_is_legal(value_str, value_len)) {
+      // The value has invalid characters
+      rb_raise(rb_eArgError,
+               "Header value '%s' has invalid characters", value_str);
+      return ST_STOP;
     }
-    md_ary->metadata[md_ary->count].value = RSTRING_PTR(val);
-    md_ary->metadata[md_ary->count].value_length = RSTRING_LEN(val);
+    md_ary->metadata[md_ary->count].key = key_str;
+    md_ary->metadata[md_ary->count].value = value_str;
+    md_ary->metadata[md_ary->count].value_length = value_len;
     md_ary->count += 1;
   }
 
diff --git a/src/ruby/ext/grpc/rb_call_credentials.c b/src/ruby/ext/grpc/rb_call_credentials.c
index acc547279907fbda17fe429b18d023dcc439fbdb..4d719d7541754a9c3c1d7a84ba523a1084748ba7 100644
--- a/src/ruby/ext/grpc/rb_call_credentials.c
+++ b/src/ruby/ext/grpc/rb_call_credentials.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
@@ -38,8 +38,10 @@
 
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
 
 #include "rb_call.h"
+#include "rb_event_thread.h"
 #include "rb_grpc.h"
 
 /* grpc_rb_cCallCredentials is the ruby class that proxies
@@ -87,7 +89,7 @@ static VALUE grpc_rb_call_credentials_callback_rescue(VALUE args,
   return result;
 }
 
-static void *grpc_rb_call_credentials_callback_with_gil(void *param) {
+static void grpc_rb_call_credentials_callback_with_gil(void *param) {
   callback_params *const params = (callback_params *)param;
   VALUE auth_uri = rb_str_new_cstr(params->context.service_url);
   /* Pass the arguments to the proc in a hash, which currently only has they key
@@ -113,21 +115,20 @@ static void *grpc_rb_call_credentials_callback_with_gil(void *param) {
   params->callback(params->user_data, md_ary.metadata, md_ary.count, status,
                    error_details);
   grpc_metadata_array_destroy(&md_ary);
-
-  return NULL;
+  gpr_free(params);
 }
 
 static void grpc_rb_call_credentials_plugin_get_metadata(
     void *state, grpc_auth_metadata_context context,
     grpc_credentials_plugin_metadata_cb cb, void *user_data) {
-  callback_params params;
-  params.get_metadata = (VALUE)state;
-  params.context = context;
-  params.user_data = user_data;
-  params.callback = cb;
-
-  rb_thread_call_with_gvl(grpc_rb_call_credentials_callback_with_gil,
-                          (void*)(&params));
+  callback_params *params = gpr_malloc(sizeof(callback_params));
+  params->get_metadata = (VALUE)state;
+  params->context = context;
+  params->user_data = user_data;
+  params->callback = cb;
+
+  grpc_rb_event_queue_enqueue(grpc_rb_call_credentials_callback_with_gil,
+                              (void*)(params));
 }
 
 static void grpc_rb_call_credentials_plugin_destroy(void *state) {
@@ -300,6 +301,8 @@ void Init_grpc_call_credentials() {
                    grpc_rb_call_credentials_compose, -1);
 
   id_callback = rb_intern("__callback");
+
+  grpc_rb_event_queue_thread_start();
 }
 
 /* Gets the wrapped grpc_call_credentials from the ruby wrapper */
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index d5d82421f59188fd693474114354d6dee236f800..2fb8a5cdf006a21897a0b0faf5ae43b9d9a37b5c 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -59,6 +59,9 @@ static ID id_target;
  * GCed before the channel */
 static ID id_cqueue;
 
+/* id_insecure_channel is used to indicate that a channel is insecure */
+static VALUE id_insecure_channel;
+
 /* grpc_rb_cChannel is the ruby class that proxies grpc_channel. */
 static VALUE grpc_rb_cChannel = Qnil;
 
@@ -126,7 +129,8 @@ static VALUE grpc_rb_channel_alloc(VALUE cls) {
 
 /*
   call-seq:
-    insecure_channel = Channel:new("myhost:8080", {'arg1': 'value1'})
+    insecure_channel = Channel:new("myhost:8080", {'arg1': 'value1'},
+                                   :this_channel_is_insecure)
     creds = ...
     secure_channel = Channel:new("myhost:443", {'arg1': 'value1'}, creds)
 
@@ -142,13 +146,18 @@ static VALUE grpc_rb_channel_init(int argc, VALUE *argv, VALUE self) {
   grpc_channel_args args;
   MEMZERO(&args, grpc_channel_args, 1);
 
-  /* "21" == 2 mandatory args, 1 (credentials) is optional */
-  rb_scan_args(argc, argv, "21", &target, &channel_args, &credentials);
+  /* "3" == 3 mandatory args */
+  rb_scan_args(argc, argv, "3", &target, &channel_args, &credentials);
 
   TypedData_Get_Struct(self, grpc_rb_channel, &grpc_channel_data_type, wrapper);
   target_chars = StringValueCStr(target);
   grpc_rb_hash_convert_to_channel_args(channel_args, &args);
-  if (credentials == Qnil) {
+  if (TYPE(credentials) == T_SYMBOL) {
+    if (id_insecure_channel != SYM2ID(credentials)) {
+      rb_raise(rb_eTypeError,
+               "bad creds symbol, want :this_channel_is_insecure");
+      return Qnil;
+    }
     ch = grpc_insecure_channel_create(target_chars, &args, NULL);
   } else {
     creds = grpc_rb_get_wrapped_channel_credentials(credentials);
@@ -408,6 +417,7 @@ void Init_grpc_channel() {
                   ID2SYM(rb_intern(GRPC_ARG_MAX_CONCURRENT_STREAMS)));
   rb_define_const(grpc_rb_cChannel, "MAX_MESSAGE_LENGTH",
                   ID2SYM(rb_intern(GRPC_ARG_MAX_MESSAGE_LENGTH)));
+  id_insecure_channel = rb_intern("this_channel_is_insecure");
   Init_grpc_propagate_masks();
   Init_grpc_connectivity_states();
 }
diff --git a/src/ruby/ext/grpc/rb_event_thread.c b/src/ruby/ext/grpc/rb_event_thread.c
new file mode 100644
index 0000000000000000000000000000000000000000..95af091317ce6db0316ae6f29d4f657d4bbc61fe
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_event_thread.c
@@ -0,0 +1,153 @@
+/*
+ *
+ * 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 "rb_event_thread.h"
+
+#include <stdbool.h>
+
+#include <ruby/ruby.h>
+#include <ruby/thread.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include <grpc/support/log.h>
+
+typedef struct grpc_rb_event {
+  // callback will be called with argument while holding the GVL
+  void (*callback)(void*);
+  void *argument;
+
+  struct grpc_rb_event *next;
+} grpc_rb_event;
+
+typedef struct grpc_rb_event_queue {
+  grpc_rb_event *head;
+  grpc_rb_event *tail;
+
+  gpr_mu mu;
+  gpr_cv cv;
+
+  // Indicates that the thread should stop waiting
+  bool abort;
+} grpc_rb_event_queue;
+
+static grpc_rb_event_queue event_queue;
+
+void grpc_rb_event_queue_enqueue(void (*callback)(void*),
+                                 void *argument) {
+  grpc_rb_event *event = gpr_malloc(sizeof(grpc_rb_event));
+  event->callback = callback;
+  event->argument = argument;
+  event->next = NULL;
+  gpr_mu_lock(&event_queue.mu);
+  if (event_queue.tail == NULL) {
+    event_queue.head = event_queue.tail = event;
+  } else {
+    event_queue.tail->next = event;
+    event_queue.tail = event;
+  }
+  gpr_cv_signal(&event_queue.cv);
+  gpr_mu_unlock(&event_queue.mu);
+}
+
+static grpc_rb_event *grpc_rb_event_queue_dequeue() {
+  grpc_rb_event *event;
+  if (event_queue.head == NULL) {
+    event = NULL;
+  } else {
+    event = event_queue.head;
+    if (event_queue.head->next == NULL) {
+      event_queue.head = event_queue.tail = NULL;
+    } else {
+      event_queue.head = event_queue.head->next;
+    }
+  }
+  return event;
+}
+
+static void grpc_rb_event_queue_destroy() {
+  gpr_mu_destroy(&event_queue.mu);
+  gpr_cv_destroy(&event_queue.cv);
+}
+
+static void *grpc_rb_wait_for_event_no_gil(void *param) {
+  grpc_rb_event *event = NULL;
+  gpr_mu_lock(&event_queue.mu);
+  while ((event = grpc_rb_event_queue_dequeue()) == NULL) {
+    gpr_cv_wait(&event_queue.cv,
+                &event_queue.mu,
+                gpr_inf_future(GPR_CLOCK_REALTIME));
+    if (event_queue.abort) {
+      gpr_mu_unlock(&event_queue.mu);
+      return NULL;
+    }
+  }
+  gpr_mu_unlock(&event_queue.mu);
+  return event;
+}
+
+static void grpc_rb_event_unblocking_func(void *arg) {
+  gpr_mu_lock(&event_queue.mu);
+  event_queue.abort = true;
+  gpr_cv_signal(&event_queue.cv);
+  gpr_mu_unlock(&event_queue.mu);
+}
+
+/* This is the implementation of the thread that handles auth metadata plugin
+ * events */
+static VALUE grpc_rb_event_thread(VALUE arg) {
+  grpc_rb_event *event;
+  while(true) {
+    event = (grpc_rb_event*)rb_thread_call_without_gvl(
+        grpc_rb_wait_for_event_no_gil, NULL,
+        grpc_rb_event_unblocking_func, NULL);
+    if (event == NULL) {
+      // Indicates that the thread needs to shut down
+      break;
+    } else {
+      event->callback(event->argument);
+      gpr_free(event);
+    }
+  }
+  grpc_rb_event_queue_destroy();
+  return Qnil;
+}
+
+void grpc_rb_event_queue_thread_start() {
+  event_queue.head = event_queue.tail = NULL;
+  event_queue.abort = false;
+  gpr_mu_init(&event_queue.mu);
+  gpr_cv_init(&event_queue.cv);
+
+  rb_thread_create(grpc_rb_event_thread, NULL);
+}
diff --git a/src/ruby/ext/grpc/rb_event_thread.h b/src/ruby/ext/grpc/rb_event_thread.h
new file mode 100644
index 0000000000000000000000000000000000000000..46638bfcf531680c46ebbd761993128ed1e47e51
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_event_thread.h
@@ -0,0 +1,37 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+void grpc_rb_event_queue_thread_start();
+
+void grpc_rb_event_queue_enqueue(void (*callback)(void*),
+                                 void *argument);
diff --git a/src/ruby/grpc.gemspec b/src/ruby/grpc.gemspec
deleted file mode 100755
index 363abe9a46322bdbe27614cb25eb2f8c2bdf2794..0000000000000000000000000000000000000000
--- a/src/ruby/grpc.gemspec
+++ /dev/null
@@ -1,45 +0,0 @@
-# -*- ruby -*-
-# encoding: utf-8
-$LOAD_PATH.push File.expand_path('../lib', __FILE__)
-require 'grpc/version'
-
-Gem::Specification.new do |s|
-  s.name          = 'grpc'
-  s.version       = GRPC::VERSION
-  s.authors       = ['gRPC Authors']
-  s.email         = 'temiola@google.com'
-  s.homepage      = 'https://github.com/google/grpc/tree/master/src/ruby'
-  s.summary       = 'GRPC system in Ruby'
-  s.description   = 'Send RPCs from Ruby using GRPC'
-  s.license       = 'BSD-3-Clause'
-
-  s.required_ruby_version = '>= 2.0.0'
-  s.requirements << 'libgrpc ~> 0.11.0 needs to be installed'
-
-  s.files = %w( Rakefile )
-  s.files += Dir.glob('bin/**/*')
-  s.files += Dir.glob('ext/**/*')
-  s.files += Dir.glob('lib/**/*')
-  s.files += Dir.glob('pb/**/*')
-  s.test_files = Dir.glob('spec/**/*')
-  %w(math noproto).each do |b|
-    s.executables += ["#{b}_client.rb", "#{b}_server.rb"]
-  end
-  s.executables += %w(grpc_ruby_interop_client grpc_ruby_interop_server)
-  s.require_paths = %w( bin lib pb )
-  s.platform      = Gem::Platform::RUBY
-
-  s.add_dependency 'google-protobuf', '~> 3.0.0alpha.1.1'
-  s.add_dependency 'googleauth', '~> 0.4'
-
-  s.add_development_dependency 'bundler', '~> 1.9'
-  s.add_development_dependency 'logging', '~> 2.0'
-  s.add_development_dependency 'simplecov', '~> 0.9'
-  s.add_development_dependency 'rake', '~> 10.4'
-  s.add_development_dependency 'rake-compiler', '~> 0.9'
-  s.add_development_dependency 'rspec', '~> 3.2'
-  s.add_development_dependency 'rubocop', '~> 0.30.0'
-  s.add_development_dependency 'signet', '~>0.6.0'
-
-  s.extensions = %w(ext/grpc/extconf.rb)
-end
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 80b5743e9145b638dd0f33d9d55e1efdb990a83d..1671ba3550b8f20563cc26f0eeeef480f21322f0 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -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 +27,11 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+ssl_roots_path = File.expand_path('../../../../etc/roots.pem', __FILE__)
+unless ENV['GRPC_DEFAULT_SSL_ROOTS_FILE_PATH']
+  ENV['GRPC_DEFAULT_SSL_ROOTS_FILE_PATH'] = ssl_roots_path
+end
+
 require 'grpc/errors'
 require 'grpc/grpc'
 require 'grpc/logconfig'
diff --git a/src/ruby/lib/grpc/generic/client_stub.rb b/src/ruby/lib/grpc/generic/client_stub.rb
index 13100a614c158fe6f03cf6fd8b6d55f7dcb24467..4da9ff086a9550bb1e7274f0a101df7759ef8b64 100644
--- a/src/ruby/lib/grpc/generic/client_stub.rb
+++ b/src/ruby/lib/grpc/generic/client_stub.rb
@@ -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
@@ -50,9 +50,8 @@ module GRPC
         return alt_chan
       end
       kw['grpc.primary_user_agent'] = "grpc-ruby/#{VERSION}"
-      return Core::Channel.new(host, kw) if creds.nil?
-      unless creds.is_a?(Core::ChannelCredentials)
-        fail(TypeError, '!ChannelCredentials')
+      unless creds.is_a?(Core::ChannelCredentials) || creds.is_a?(Symbol)
+        fail(TypeError, '!ChannelCredentials or Symbol')
       end
       Core::Channel.new(host, kw, creds)
     end
@@ -68,7 +67,8 @@ module GRPC
     # Minimally, a stub is created with the just the host of the gRPC service
     # it wishes to access, e.g.,
     #
-    # my_stub = ClientStub.new(example.host.com:50505)
+    # my_stub = ClientStub.new(example.host.com:50505,
+    #                          :this_channel_is_insecure)
     #
     # Any arbitrary keyword arguments are treated as channel arguments used to
     # configure the RPC connection to the host.
@@ -86,14 +86,14 @@ module GRPC
     #
     # @param host [String] the host the stub connects to
     # @param q [Core::CompletionQueue] used to wait for events
+    # @param creds [Core::ChannelCredentials|Symbol] the channel credentials, or
+    #     :this_channel_is_insecure
     # @param channel_override [Core::Channel] a pre-created channel
     # @param timeout [Number] the default timeout to use in requests
-    # @param creds [Core::ChannelCredentials] the channel credentials
     # @param kw [KeywordArgs]the channel arguments
-    def initialize(host, q,
+    def initialize(host, q, creds,
                    channel_override: nil,
                    timeout: nil,
-                   creds: nil,
                    propagate_mask: nil,
                    **kw)
       fail(TypeError, '!CompletionQueue') unless q.is_a?(Core::CompletionQueue)
@@ -464,7 +464,7 @@ module GRPC
                              method,
                              nil, # host use nil,
                              deadline)
-      call.set_credentials credentials unless credentials.nil?
+      call.set_credentials! credentials unless credentials.nil?
       ActiveCall.new(call, @queue, marshal, unmarshal, deadline, started: false)
     end
   end
diff --git a/src/ruby/lib/grpc/generic/service.rb b/src/ruby/lib/grpc/generic/service.rb
index 80ff669cca63fec2516f7e1d0799e3dfc0b11065..410e1add7dc4c88a40f57289e1708050405f77aa 100644
--- a/src/ruby/lib/grpc/generic/service.rb
+++ b/src/ruby/lib/grpc/generic/service.rb
@@ -160,10 +160,12 @@ module GRPC
         route_prefix = service_name
         Class.new(ClientStub) do
           # @param host [String] the host the stub connects to
+          # @param creds [Core::ChannelCredentials|Symbol] The channel
+          #     credentials to use, or :this_channel_is_insecure otherwise
           # @param kw [KeywordArgs] the channel arguments, plus any optional
           #                         args for configuring the client's channel
-          def initialize(host, **kw)
-            super(host, Core::CompletionQueue.new, **kw)
+          def initialize(host, creds, **kw)
+            super(host, Core::CompletionQueue.new, creds, **kw)
           end
 
           # Used define_method to add a method for each rpc_desc.  Each method
diff --git a/src/ruby/lib/grpc/version.rb b/src/ruby/lib/grpc/version.rb
index 9acf7a055a6a84903ef740d75013c4c33fa1dfd1..956e0222dfe2b22f6ea000768e27f599f454e4aa 100644
--- a/src/ruby/lib/grpc/version.rb
+++ b/src/ruby/lib/grpc/version.rb
@@ -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
@@ -29,5 +29,5 @@
 
 # GRPC contains the General RPC module.
 module GRPC
-  VERSION = '0.11.1'
+  VERSION = '0.12.0'
 end
diff --git a/src/ruby/pb/test/client.rb b/src/ruby/pb/test/client.rb
index 6cc616e5cbaf79e436c0d1723f22d593577d7107..684ee807715a17a6280841e95ea3777d542e31eb 100755
--- a/src/ruby/pb/test/client.rb
+++ b/src/ruby/pb/test/client.rb
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -56,8 +56,6 @@ require 'test/proto/empty'
 require 'test/proto/messages'
 require 'test/proto/test_services'
 
-require 'signet/ssl_config'
-
 AUTH_ENV = Google::Auth::CredentialsLoader::ENV_VAR
 
 # RubyLogger defines a logger for gRPC based on the standard ruby logger.
@@ -114,8 +112,8 @@ end
 def create_stub(opts)
   address = "#{opts.host}:#{opts.port}"
   if opts.secure
+    creds = ssl_creds(opts.use_test_ca)
     stub_opts = {
-      :creds => ssl_creds(opts.use_test_ca),
       GRPC::Core::Channel::SSL_TARGET => opts.host_override
     }
 
@@ -125,7 +123,7 @@ def create_stub(opts)
       unless opts.oauth_scope.nil?
         auth_creds = Google::Auth.get_application_default(opts.oauth_scope)
         call_creds = GRPC::Core::CallCredentials.new(auth_creds.updater_proc)
-        stub_opts[:creds] = stub_opts[:creds].compose call_creds
+        creds = creds.compose call_creds
       end
     end
 
@@ -135,20 +133,20 @@ def create_stub(opts)
 
       # use a metadata update proc that just adds the auth token.
       call_creds = GRPC::Core::CallCredentials.new(proc { |md| md.merge(kw) })
-      stub_opts[:creds] = stub_opts[:creds].compose call_creds
+      creds = creds.compose call_creds
     end
 
     if opts.test_case == 'jwt_token_creds'  # don't use a scope
       auth_creds = Google::Auth.get_application_default
       call_creds = GRPC::Core::CallCredentials.new(auth_creds.updater_proc)
-      stub_opts[:creds] = stub_opts[:creds].compose call_creds
+      creds = creds.compose call_creds
     end
 
     GRPC.logger.info("... connecting securely to #{address}")
-    Grpc::Testing::TestService::Stub.new(address, **stub_opts)
+    Grpc::Testing::TestService::Stub.new(address, creds, **stub_opts)
   else
     GRPC.logger.info("... connecting insecurely to #{address}")
-    Grpc::Testing::TestService::Stub.new(address)
+    Grpc::Testing::TestService::Stub.new(address, :this_channel_is_insecure)
   end
 end
 
@@ -266,16 +264,15 @@ class NamedTests
 
   def per_rpc_creds
     auth_creds = Google::Auth.get_application_default(@args.oauth_scope)
-    kw = auth_creds.updater_proc.call({})
+    update_metadata = proc do |md|
+      kw = auth_creds.updater_proc.call({})
+    end
 
-    # TODO(jtattermusch): downcase the metadata keys here to make sure
-    # they are not rejected by C core. This is a hotfix that should
-    # be addressed by introducing auto-downcasing logic.
-    kw = Hash[ kw.each_pair.map { |k, v|  [k.downcase, v] }]
+    call_creds = GRPC::Core::CallCredentials.new(update_metadata)
 
     resp = perform_large_unary(fill_username: true,
                                fill_oauth_scope: true,
-                               **kw)
+                               credentials: call_creds)
     json_key = File.read(ENV[AUTH_ENV])
     wanted_email = MultiJson.load(json_key)['client_email']
     assert("#{__callee__}: bad username") { wanted_email == resp.username }
diff --git a/src/ruby/spec/call_spec.rb b/src/ruby/spec/call_spec.rb
index 6629570fba94f0552a97c3d06c86a83be6ac3758..ae3ce0748a2bd1478ab75520d39860157a524610 100644
--- a/src/ruby/spec/call_spec.rb
+++ b/src/ruby/spec/call_spec.rb
@@ -101,7 +101,7 @@ describe GRPC::Core::Call do
   let(:fake_host) { 'localhost:10101' }
 
   before(:each) do
-    @ch = GRPC::Core::Channel.new(fake_host, nil)
+    @ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
   end
 
   describe '#status' do
diff --git a/src/ruby/spec/channel_spec.rb b/src/ruby/spec/channel_spec.rb
index b4d2b94a819be73bafab7587a4f9d7445d0d76c5..355f95c9d798ed930b08e1af00e7efba83f1e24f 100644
--- a/src/ruby/spec/channel_spec.rb
+++ b/src/ruby/spec/channel_spec.rb
@@ -45,7 +45,10 @@ describe GRPC::Core::Channel do
 
   shared_examples '#new' do
     it 'take a host name without channel args' do
-      expect { GRPC::Core::Channel.new('dummy_host', nil) }.not_to raise_error
+      blk = proc do
+        GRPC::Core::Channel.new('dummy_host', nil, :this_channel_is_insecure)
+      end
+      expect(&blk).not_to raise_error
     end
 
     it 'does not take a hash with bad keys as channel args' do
@@ -106,13 +109,15 @@ describe GRPC::Core::Channel do
     it_behaves_like '#new'
 
     def construct_with_args(a)
-      proc { GRPC::Core::Channel.new('dummy_host', a) }
+      proc do
+        GRPC::Core::Channel.new('dummy_host', a, :this_channel_is_insecure)
+      end
     end
   end
 
   describe '#create_call' do
     it 'creates a call OK' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
 
       deadline = Time.now + 5
 
@@ -123,7 +128,7 @@ describe GRPC::Core::Channel do
     end
 
     it 'raises an error if called on a closed channel' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
       ch.close
 
       deadline = Time.now + 5
@@ -136,13 +141,13 @@ describe GRPC::Core::Channel do
 
   describe '#destroy' do
     it 'destroys a channel ok' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
       blk = proc { ch.destroy }
       expect(&blk).to_not raise_error
     end
 
     it 'can be called more than once without error' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
       blk = proc { ch.destroy }
       blk.call
       expect(&blk).to_not raise_error
@@ -157,13 +162,13 @@ describe GRPC::Core::Channel do
 
   describe '#close' do
     it 'closes a channel ok' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
       blk = proc { ch.close }
       expect(&blk).to_not raise_error
     end
 
     it 'can be called more than once without error' do
-      ch = GRPC::Core::Channel.new(fake_host, nil)
+      ch = GRPC::Core::Channel.new(fake_host, nil, :this_channel_is_insecure)
       blk = proc { ch.close }
       blk.call
       expect(&blk).to_not raise_error
diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index 7cce2076c93d4148189e717cca1c06dc9cdfa85b..594fda1cd3e433f9408478c5951b2bf941e09c18 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -397,7 +397,7 @@ describe 'the http client/server' do
     @server = GRPC::Core::Server.new(@server_queue, nil)
     server_port = @server.add_http2_port(server_host, :this_port_is_insecure)
     @server.start
-    @ch = Channel.new("0.0.0.0:#{server_port}", nil)
+    @ch = Channel.new("0.0.0.0:#{server_port}", nil, :this_channel_is_insecure)
   end
 
   after(:example) do
diff --git a/src/ruby/spec/generic/active_call_spec.rb b/src/ruby/spec/generic/active_call_spec.rb
index b05e3284fe81207bf84fcd7c0d5fdfae66ca88a0..c0181e21fb018e3b7ab0967180a94f88eab59431 100644
--- a/src/ruby/spec/generic/active_call_spec.rb
+++ b/src/ruby/spec/generic/active_call_spec.rb
@@ -48,7 +48,8 @@ describe GRPC::ActiveCall do
     @server = GRPC::Core::Server.new(@server_queue, nil)
     server_port = @server.add_http2_port(host, :this_port_is_insecure)
     @server.start
-    @ch = GRPC::Core::Channel.new("0.0.0.0:#{server_port}", nil)
+    @ch = GRPC::Core::Channel.new("0.0.0.0:#{server_port}", nil,
+                                  :this_channel_is_insecure)
   end
 
   after(:each) do
diff --git a/src/ruby/spec/generic/client_stub_spec.rb b/src/ruby/spec/generic/client_stub_spec.rb
index 40550230dd9775f97a8143dc2ae868e9276c70b1..5e13c25fcf3e6d1e70f416006a2609cc1af2363c 100644
--- a/src/ruby/spec/generic/client_stub_spec.rb
+++ b/src/ruby/spec/generic/client_stub_spec.rb
@@ -70,7 +70,7 @@ describe 'ClientStub' do
     it 'can be created from a host and args' do
       opts = { a_channel_arg: 'an_arg' }
       blk = proc do
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
       end
       expect(&blk).not_to raise_error
     end
@@ -78,7 +78,7 @@ describe 'ClientStub' do
     it 'can be created with a default deadline' do
       opts = { a_channel_arg: 'an_arg', deadline: 5 }
       blk = proc do
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
       end
       expect(&blk).not_to raise_error
     end
@@ -86,7 +86,7 @@ describe 'ClientStub' do
     it 'can be created with an channel override' do
       opts = { a_channel_arg: 'an_arg', channel_override: @ch }
       blk = proc do
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
       end
       expect(&blk).not_to raise_error
     end
@@ -94,15 +94,15 @@ describe 'ClientStub' do
     it 'cannot be created with a bad channel override' do
       blk = proc do
         opts = { a_channel_arg: 'an_arg', channel_override: Object.new }
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        GRPC::ClientStub.new(fake_host, @cq, :this_channel_is_insecure, **opts)
       end
       expect(&blk).to raise_error
     end
 
     it 'cannot be created with bad credentials' do
       blk = proc do
-        opts = { a_channel_arg: 'an_arg', creds: Object.new }
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        opts = { a_channel_arg: 'an_arg' }
+        GRPC::ClientStub.new(fake_host, @cq, Object.new, **opts)
       end
       expect(&blk).to raise_error
     end
@@ -112,10 +112,10 @@ describe 'ClientStub' do
       blk = proc do
         opts = {
           GRPC::Core::Channel::SSL_TARGET => 'foo.test.google.fr',
-          a_channel_arg: 'an_arg',
-          creds: GRPC::Core::ChannelCredentials.new(certs[0], nil, nil)
+          a_channel_arg: 'an_arg'
         }
-        GRPC::ClientStub.new(fake_host, @cq, **opts)
+        creds = GRPC::Core::ChannelCredentials.new(certs[0], nil, nil)
+        GRPC::ClientStub.new(fake_host, @cq, creds,  **opts)
       end
       expect(&blk).to_not raise_error
     end
@@ -130,7 +130,8 @@ describe 'ClientStub' do
       it 'should send a request to/receive a reply from a server' do
         server_port = create_test_server
         th = run_request_response(@sent_msg, @resp, @pass)
-        stub = GRPC::ClientStub.new("localhost:#{server_port}", @cq)
+        stub = GRPC::ClientStub.new("localhost:#{server_port}", @cq,
+                                    :this_channel_is_insecure)
         expect(get_response(stub)).to eq(@resp)
         th.join
       end
@@ -140,7 +141,7 @@ describe 'ClientStub' do
         host = "localhost:#{server_port}"
         th = run_request_response(@sent_msg, @resp, @pass,
                                   k1: 'v1', k2: 'v2')
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         expect(get_response(stub)).to eq(@resp)
         th.join
       end
@@ -149,8 +150,10 @@ describe 'ClientStub' do
         server_port = create_test_server
         alt_host = "localhost:#{server_port}"
         th = run_request_response(@sent_msg, @resp, @pass)
-        ch = GRPC::Core::Channel.new(alt_host, nil)
-        stub = GRPC::ClientStub.new('ignored-host', @cq, channel_override: ch)
+        ch = GRPC::Core::Channel.new(alt_host, nil, :this_channel_is_insecure)
+        stub = GRPC::ClientStub.new('ignored-host', @cq,
+                                    :this_channel_is_insecure,
+                                    channel_override: ch)
         expect(get_response(stub)).to eq(@resp)
         th.join
       end
@@ -159,7 +162,7 @@ describe 'ClientStub' do
         server_port = create_test_server
         host = "localhost:#{server_port}"
         th = run_request_response(@sent_msg, @resp, @fail)
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         blk = proc { get_response(stub) }
         expect(&blk).to raise_error(GRPC::BadStatus)
         th.join
@@ -198,7 +201,7 @@ describe 'ClientStub' do
         server_port = create_test_server
         host = "localhost:#{server_port}"
         th = run_client_streamer(@sent_msgs, @resp, @pass)
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         expect(get_response(stub)).to eq(@resp)
         th.join
       end
@@ -208,7 +211,7 @@ describe 'ClientStub' do
         host = "localhost:#{server_port}"
         th = run_client_streamer(@sent_msgs, @resp, @pass,
                                  k1: 'v1', k2: 'v2')
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         expect(get_response(stub)).to eq(@resp)
         th.join
       end
@@ -217,7 +220,7 @@ describe 'ClientStub' do
         server_port = create_test_server
         host = "localhost:#{server_port}"
         th = run_client_streamer(@sent_msgs, @resp, @fail)
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         blk = proc { get_response(stub) }
         expect(&blk).to raise_error(GRPC::BadStatus)
         th.join
@@ -256,7 +259,7 @@ describe 'ClientStub' do
         server_port = create_test_server
         host = "localhost:#{server_port}"
         th = run_server_streamer(@sent_msg, @replys, @pass)
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         expect(get_responses(stub).collect { |r| r }).to eq(@replys)
         th.join
       end
@@ -265,7 +268,7 @@ describe 'ClientStub' do
         server_port = create_test_server
         host = "localhost:#{server_port}"
         th = run_server_streamer(@sent_msg, @replys, @fail)
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         e = get_responses(stub)
         expect { e.collect { |r| r } }.to raise_error(GRPC::BadStatus)
         th.join
@@ -276,7 +279,7 @@ describe 'ClientStub' do
         host = "localhost:#{server_port}"
         th = run_server_streamer(@sent_msg, @replys, @fail,
                                  k1: 'v1', k2: 'v2')
-        stub = GRPC::ClientStub.new(host, @cq)
+        stub = GRPC::ClientStub.new(host, @cq, :this_channel_is_insecure)
         e = get_responses(stub)
         expect { e.collect { |r| r } }.to raise_error(GRPC::BadStatus)
         th.join
@@ -320,7 +323,7 @@ describe 'ClientStub' do
       it 'supports sending all the requests first', bidi: true do
         th = run_bidi_streamer_handle_inputs_first(@sent_msgs, @replys,
                                                    @pass)
-        stub = GRPC::ClientStub.new(@host, @cq)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
         e = get_responses(stub)
         expect(e.collect { |r| r }).to eq(@replys)
         th.join
@@ -328,7 +331,7 @@ describe 'ClientStub' do
 
       it 'supports client-initiated ping pong', bidi: true do
         th = run_bidi_streamer_echo_ping_pong(@sent_msgs, @pass, true)
-        stub = GRPC::ClientStub.new(@host, @cq)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
         e = get_responses(stub)
         expect(e.collect { |r| r }).to eq(@sent_msgs)
         th.join
@@ -336,7 +339,7 @@ describe 'ClientStub' do
 
       it 'supports a server-initiated ping pong', bidi: true do
         th = run_bidi_streamer_echo_ping_pong(@sent_msgs, @pass, false)
-        stub = GRPC::ClientStub.new(@host, @cq)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
         e = get_responses(stub)
         expect(e.collect { |r| r }).to eq(@sent_msgs)
         th.join
@@ -376,7 +379,7 @@ describe 'ClientStub' do
 
       it 'should fail with DeadlineExceeded', bidi: true do
         @server.start
-        stub = GRPC::ClientStub.new(@host, @cq)
+        stub = GRPC::ClientStub.new(@host, @cq, :this_channel_is_insecure)
         blk = proc do
           e = stub.bidi_streamer(@method, @sent_msgs, noop, noop,
                                  timeout: 0.001)
diff --git a/src/ruby/spec/generic/rpc_server_spec.rb b/src/ruby/spec/generic/rpc_server_spec.rb
index d95a0213113ab91378392ef7701dc03e6588e44e..be6331d68bb9a392d773af59a8c3dceb53ca187a 100644
--- a/src/ruby/spec/generic/rpc_server_spec.rb
+++ b/src/ruby/spec/generic/rpc_server_spec.rb
@@ -141,7 +141,7 @@ describe GRPC::RpcServer do
     @server = GRPC::Core::Server.new(@server_queue, nil)
     server_port = @server.add_http2_port(server_host, :this_port_is_insecure)
     @host = "localhost:#{server_port}"
-    @ch = GRPC::Core::Channel.new(@host, nil)
+    @ch = GRPC::Core::Channel.new(@host, nil, :this_channel_is_insecure)
   end
 
   describe '#new' do
@@ -355,7 +355,8 @@ describe GRPC::RpcServer do
         req = EchoMsg.new
         blk = proc do
           cq = GRPC::Core::CompletionQueue.new
-          stub = GRPC::ClientStub.new(@host, cq, **client_opts)
+          stub = GRPC::ClientStub.new(@host, cq, :this_channel_is_insecure,
+                                      **client_opts)
           stub.request_response('/unknown', req, marshal, unmarshal)
         end
         expect(&blk).to raise_error GRPC::BadStatus
@@ -369,7 +370,7 @@ describe GRPC::RpcServer do
         @srv.wait_till_running
         req = EchoMsg.new
         n = 5  # arbitrary
-        stub = EchoStub.new(@host, **client_opts)
+        stub = EchoStub.new(@host, :this_channel_is_insecure, **client_opts)
         n.times { expect(stub.an_rpc(req)).to be_a(EchoMsg) }
         @srv.stop
         t.join
@@ -381,7 +382,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = EchoStub.new(@host, **client_opts)
+        stub = EchoStub.new(@host, :this_channel_is_insecure, **client_opts)
         expect(stub.an_rpc(req, k1: 'v1', k2: 'v2')).to be_a(EchoMsg)
         wanted_md = [{ 'k1' => 'v1', 'k2' => 'v2' }]
         check_md(wanted_md, service.received_md)
@@ -395,7 +396,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = SlowStub.new(@host, **client_opts)
+        stub = SlowStub.new(@host, :this_channel_is_insecure, **client_opts)
         timeout = service.delay + 1.0 # wait for long enough
         resp = stub.an_rpc(req, timeout: timeout, k1: 'v1', k2: 'v2')
         expect(resp).to be_a(EchoMsg)
@@ -411,7 +412,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = SlowStub.new(@host, **client_opts)
+        stub = SlowStub.new(@host, :this_channel_is_insecure, **client_opts)
         op = stub.an_rpc(req, k1: 'v1', k2: 'v2', return_op: true)
         Thread.new do  # cancel the call
           sleep 0.1
@@ -431,7 +432,7 @@ describe GRPC::RpcServer do
         threads = [t]
         n.times do
           threads << Thread.new do
-            stub = EchoStub.new(@host, **client_opts)
+            stub = EchoStub.new(@host, :this_channel_is_insecure, **client_opts)
             q << stub.an_rpc(req)
           end
         end
@@ -459,7 +460,7 @@ describe GRPC::RpcServer do
         one_failed_as_unavailable = false
         n.times do
           threads << Thread.new do
-            stub = SlowStub.new(@host, **client_opts)
+            stub = SlowStub.new(@host, :this_channel_is_insecure, **client_opts)
             begin
               stub.an_rpc(req)
             rescue GRPC::BadStatus => e
@@ -499,7 +500,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = EchoStub.new(@host, **client_opts)
+        stub = EchoStub.new(@host, :this_channel_is_insecure, **client_opts)
         op = stub.an_rpc(req, k1: 'v1', k2: 'v2', return_op: true)
         expect(op.metadata).to be nil
         expect(op.execute).to be_a(EchoMsg)
@@ -537,7 +538,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = FailingStub.new(@host, **client_opts)
+        stub = FailingStub.new(@host, :this_channel_is_insecure, **client_opts)
         blk = proc { stub.an_rpc(req) }
 
         # confirm it raise the expected error
@@ -562,7 +563,7 @@ describe GRPC::RpcServer do
         t = Thread.new { @srv.run }
         @srv.wait_till_running
         req = EchoMsg.new
-        stub = EchoStub.new(@host, **client_opts)
+        stub = EchoStub.new(@host, :this_channel_is_insecure, **client_opts)
         op = stub.an_rpc(req, k1: 'v1', k2: 'v2', return_op: true)
         expect(op.metadata).to be nil
         expect(op.execute).to be_a(EchoMsg)
diff --git a/src/ruby/spec/generic/service_spec.rb b/src/ruby/spec/generic/service_spec.rb
index 6cfc34db84d435ef1664d390302bc9b426fd72db..5e7b6c7abaff82f0b6da36b4b9cdb7cc9a24f145 100644
--- a/src/ruby/spec/generic/service_spec.rb
+++ b/src/ruby/spec/generic/service_spec.rb
@@ -241,7 +241,7 @@ describe GenericService do
     end
 
     describe 'the generated instances' do
-      it 'can be instanciated with just a hostname' do
+      it 'can be instanciated with just a hostname and credentials' do
         s = Class.new do
           include GenericService
           rpc :AnRpc, GoodMsg, GoodMsg
@@ -250,7 +250,10 @@ describe GenericService do
           rpc :ABidiStreamer, stream(GoodMsg), stream(GoodMsg)
         end
         client_class = s.rpc_stub_class
-        expect { client_class.new('fakehostname') }.not_to raise_error
+        blk = proc do
+          client_class.new('fakehostname', :this_channel_is_insecure)
+        end
+        expect(&blk).not_to raise_error
       end
 
       it 'has the methods defined in the service' do
@@ -262,7 +265,7 @@ describe GenericService do
           rpc :ABidiStreamer, stream(GoodMsg), stream(GoodMsg)
         end
         client_class = s.rpc_stub_class
-        o = client_class.new('fakehostname')
+        o = client_class.new('fakehostname', :this_channel_is_insecure)
         expect(o.methods).to include(:an_rpc)
         expect(o.methods).to include(:a_bidi_streamer)
         expect(o.methods).to include(:a_client_streamer)
diff --git a/src/ruby/spec/pb/health/checker_spec.rb b/src/ruby/spec/pb/health/checker_spec.rb
index 322566b7842fe316a446fd228dd9b735587a9fcb..c1decd822a76062a58ea9dda0e83a18ec7776590 100644
--- a/src/ruby/spec/pb/health/checker_spec.rb
+++ b/src/ruby/spec/pb/health/checker_spec.rb
@@ -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
@@ -47,13 +47,12 @@ describe 'Health protobuf code generation' do
       end
 
       it 'should have the same content as created by code generation' do
-        root_dir = File.dirname(
-          File.dirname(File.dirname(File.dirname(__FILE__))))
-        pb_dir = File.join(root_dir, 'pb')
+        root_dir = File.join(File.dirname(__FILE__), '..', '..', '..', '..')
+        pb_dir = File.join(root_dir, 'proto')
 
         # Get the current content
-        service_path = File.join(pb_dir, 'grpc', 'health', 'v1alpha',
-                                 'health_services.rb')
+        service_path = File.join(root_dir, 'ruby', 'pb', 'grpc',
+                                 'health', 'v1alpha', 'health_services.rb')
         want = nil
         File.open(service_path) { |f| want = f.read }
 
@@ -188,7 +187,7 @@ describe Grpc::Health::Checker do
       @server = GRPC::Core::Server.new(@server_queue, nil)
       server_port = @server.add_http2_port(server_host, :this_port_is_insecure)
       @host = "localhost:#{server_port}"
-      @ch = GRPC::Core::Channel.new(@host, nil)
+      @ch = GRPC::Core::Channel.new(@host, nil, :this_channel_is_insecure)
       @client_opts = { channel_override: @ch }
       server_opts = {
         server_override: @server,
@@ -208,7 +207,7 @@ describe Grpc::Health::Checker do
       t = Thread.new { @srv.run }
       @srv.wait_till_running
 
-      stub = CheckerStub.new(@host, **@client_opts)
+      stub = CheckerStub.new(@host, :this_channel_is_insecure, **@client_opts)
       got = stub.check(HCReq.new)
       want = HCResp.new(status: ServingStatus::NOT_SERVING)
       expect(got).to eq(want)
@@ -221,7 +220,7 @@ describe Grpc::Health::Checker do
       t = Thread.new { @srv.run }
       @srv.wait_till_running
       blk = proc do
-        stub = CheckerStub.new(@host, **@client_opts)
+        stub = CheckerStub.new(@host, :this_channel_is_insecure, **@client_opts)
         stub.check(HCReq.new(host: 'unknown', service: 'unknown'))
       end
       expected_msg = /#{StatusCodes::NOT_FOUND}/
diff --git a/templates/grpc.gemspec.template b/templates/grpc.gemspec.template
new file mode 100644
index 0000000000000000000000000000000000000000..fdf87ee13fd14090fd1c1b56b4f251285e36465a
--- /dev/null
+++ b/templates/grpc.gemspec.template
@@ -0,0 +1,58 @@
+%YAML 1.2
+--- |
+  # -*- ruby -*-
+  # encoding: utf-8
+  $LOAD_PATH.push File.expand_path('../src/ruby/lib', __FILE__)
+  require 'grpc/version'
+
+  Gem::Specification.new do |s|
+    s.name          = 'grpc'
+    s.version       = GRPC::VERSION
+    s.authors       = ['gRPC Authors']
+    s.email         = 'temiola@google.com'
+    s.homepage      = 'https://github.com/google/grpc/tree/master/src/ruby'
+    s.summary       = 'GRPC system in Ruby'
+    s.description   = 'Send RPCs from Ruby using GRPC'
+    s.license       = 'BSD-3-Clause'
+
+    s.required_ruby_version = '>= 2.0.0'
+    s.requirements << 'libgrpc ~> 0.11.0 needs to be installed'
+
+    s.files = %w( Rakefile Makefile )
+    s.files += %w( etc/roots.pem )
+    s.files += Dir.glob('src/ruby/bin/**/*')
+    s.files += Dir.glob('src/ruby/ext/**/*')
+    s.files += Dir.glob('src/ruby/lib/**/*')
+    s.files += Dir.glob('src/ruby/pb/**/*')
+    s.files += Dir.glob('include/grpc/**/*')
+    s.test_files = Dir.glob('src/ruby/spec/**/*')
+    s.bindir = 'src/ruby/bin'
+    ${'%'}w(math noproto).each do |b|
+      s.executables += ["#{b}_client.rb", "#{b}_server.rb"]
+    end
+    s.executables += %w(grpc_ruby_interop_client grpc_ruby_interop_server)
+    s.require_paths = %w( src/ruby/bin src/ruby/lib src/ruby/pb )
+    s.platform      = Gem::Platform::RUBY
+
+    s.add_dependency 'google-protobuf', '~> 3.0.0alpha.1.1'
+    s.add_dependency 'googleauth', '~> 0.5.1'
+
+    s.add_development_dependency 'bundler', '~> 1.9'
+    s.add_development_dependency 'logging', '~> 2.0'
+    s.add_development_dependency 'simplecov', '~> 0.9'
+    s.add_development_dependency 'rake', '~> 10.4'
+    s.add_development_dependency 'rake-compiler', '~> 0.9'
+    s.add_development_dependency 'rspec', '~> 3.2'
+    s.add_development_dependency 'rubocop', '~> 0.30.0'
+    s.add_development_dependency 'signet', '~>0.7.0'
+
+    s.extensions = %w(src/ruby/ext/grpc/extconf.rb)
+
+    % for lib in libs:
+    % if lib.name in ('gpr', 'grpc'):
+    % for file in lib.public_headers + lib.headers + lib.src:
+    s.files += %w( ${file} )
+    % endfor
+    % endif
+    % endfor
+  end
diff --git a/templates/package.json.template b/templates/package.json.template
new file mode 100644
index 0000000000000000000000000000000000000000..d50b1e2eebdbcce51469fc53549ede7ea8e51288
--- /dev/null
+++ b/templates/package.json.template
@@ -0,0 +1,74 @@
+%YAML 1.2
+--- |
+  {
+    "name": "grpc",
+    "version": "0.12.0",
+    "author": "Google Inc.",
+    "description": "gRPC Library for Node",
+    "homepage": "http://www.grpc.io/",
+    "repository": {
+      "type": "git",
+      "url": "https://github.com/grpc/grpc.git"
+    },
+    "bugs": "https://github.com/grpc/grpc/issues",
+    "contributors": [
+      {
+        "name": "Michael Lumish",
+        "email": "mlumish@google.com"
+      }
+    ],
+    "directories": {
+      "lib": "src/node/src"
+    },
+    "scripts": {
+      "lint": "node ./node_modules/jshint/bin/jshint src/node/src src/node/test src/node/interop src/node/index.js",
+      "test": "./node_modules/.bin/mocha src/node/test && npm run-script lint",
+      "gen_docs": "./node_modules/.bin/jsdoc -c src/node/jsdoc_conf.json",
+      "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha src/node/test"
+    },
+    "dependencies": {
+      "bindings": "^1.2.0",
+      "lodash": "^3.9.3",
+      "nan": "^2.0.0",
+      "protobufjs": "^4.0.0"
+    },
+    "devDependencies": {
+      "async": "^1.5.0",
+      "google-auth-library": "^0.9.2",
+      "istanbul": "^0.3.21",
+      "jsdoc": "^3.3.2",
+      "jshint": "^2.5.0",
+      "minimist": "^1.1.0",
+      "mocha": "^2.3.4",
+      "mocha-jenkins-reporter": "^0.1.9",
+      "mustache": "^2.0.0",
+      "poisson-process": "^0.2.1"
+    },
+    "engines": {
+      "node": ">=0.10.13"
+    },
+    "files": [
+      "LICENSE",
+      "src/node/README.md",
+      "src/node/health_check",
+      "src/proto",
+      "etc",
+      % for module in node_modules:
+      % for file in module.headers + module.src + module.js:
+      "${file}",
+      % endfor
+      % for dep in module.transitive_deps:
+      % for lib in libs:
+      % if lib.name == dep:
+      % for file in lib.public_headers + lib.headers + lib.src:
+      "${file}",
+      % endfor
+      % endif
+      % endfor
+      % endfor
+      % endfor
+      "binding.gyp"
+    ],
+    "main": "src/node/index.js",
+    "license": "BSD-3-Clause"
+  }
diff --git a/test/core/transport/chttp2/bin_encoder_test.c b/test/core/transport/chttp2/bin_encoder_test.c
index 1ffd8ed3cbf0cb9ab161597f728548c0fa1852f1..d1838075be01fe9f2dcdf4ef957a815b3817d8dd 100644
--- a/test/core/transport/chttp2/bin_encoder_test.c
+++ b/test/core/transport/chttp2/bin_encoder_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
@@ -35,6 +35,10 @@
 
 #include <string.h>
 
+/* This is here for grpc_is_binary_header
+ * TODO(murgatroid99): Remove this
+ */
+#include <grpc/grpc.h>
 #include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 62023b24fd265a40ad11109b425b3f8072fc5b8e..cfda571326bac428712935f4ef5200f4ecd7918d 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -33,21 +33,21 @@
 
 #include <memory>
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 #include "test/cpp/util/string_ref_helper.h"
 
 #ifdef GPR_POSIX_SOCKET
@@ -186,7 +186,7 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
     build_bad.AddListeningPort(server_address_.str(),
                                grpc::InsecureServerCredentials());
     build_bad.RegisterAsyncService(&service_);
-    grpc::testing::TestService::Service sync_service;
+    grpc::testing::EchoTestService::Service sync_service;
     build_bad.RegisterService(&sync_service);
     GPR_ASSERT(build_bad.BuildAndStart() == nullptr);
 
@@ -211,7 +211,7 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
   void ResetStub() {
     std::shared_ptr<Channel> channel =
         CreateChannel(server_address_.str(), InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel);
   }
 
   void SendRpc(int num_rpcs) {
@@ -249,9 +249,9 @@ class AsyncEnd2endTest : public ::testing::TestWithParam<bool> {
   }
 
   std::unique_ptr<ServerCompletionQueue> cq_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
-  grpc::testing::TestService::AsyncService service_;
+  grpc::testing::EchoTestService::AsyncService service_;
   std::ostringstream server_address_;
 };
 
diff --git a/test/cpp/end2end/client_crash_test.cc b/test/cpp/end2end/client_crash_test.cc
index 68c63b2f93dd08f0051807378a0798d186cf49c5..d0efabc5ca20729da72bc30cdcd8566ce2eae3be 100644
--- a/test/cpp/end2end/client_crash_test.cc
+++ b/test/cpp/end2end/client_crash_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
@@ -31,21 +31,21 @@
  *
  */
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 #include "test/cpp/util/subprocess.h"
 
 using grpc::testing::EchoRequest;
@@ -63,7 +63,7 @@ class CrashTest : public ::testing::Test {
  protected:
   CrashTest() {}
 
-  std::unique_ptr<grpc::testing::TestService::Stub> CreateServerAndStub() {
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> CreateServerAndStub() {
     auto port = grpc_pick_unused_port_or_die();
     std::ostringstream addr_stream;
     addr_stream << "localhost:" << port;
@@ -72,7 +72,7 @@ class CrashTest : public ::testing::Test {
         g_root + "/client_crash_test_server", "--address=" + addr,
     }));
     GPR_ASSERT(server_);
-    return grpc::testing::TestService::NewStub(
+    return grpc::testing::EchoTestService::NewStub(
         CreateChannel(addr, InsecureChannelCredentials()));
   }
 
@@ -155,4 +155,4 @@ int main(int argc, char** argv) {
     }
   }
   return 0;
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/client_crash_test_server.cc b/test/cpp/end2end/client_crash_test_server.cc
index f9a9c187a7e9aa4316c75af9ee5f386835d62a3d..8219631c74f9d75de52028fc500d43cce9f998f4 100644
--- a/test/cpp/end2end/client_crash_test_server.cc
+++ b/test/cpp/end2end/client_crash_test_server.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
@@ -31,10 +31,10 @@
  *
  */
 
+#include <gflags/gflags.h>
 #include <iostream>
 #include <memory>
 #include <string>
-#include <gflags/gflags.h>
 
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
@@ -56,7 +56,8 @@ using namespace gflags;
 namespace grpc {
 namespace testing {
 
-class ServiceImpl GRPC_FINAL : public ::grpc::testing::TestService::Service {
+class ServiceImpl GRPC_FINAL
+    : public ::grpc::testing::EchoTestService::Service {
   Status BidiStream(ServerContext* context,
                     ServerReaderWriter<EchoResponse, EchoRequest>* stream)
       GRPC_OVERRIDE {
@@ -89,4 +90,4 @@ int main(int argc, char** argv) {
   grpc::testing::RunServer();
 
   return 0;
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/end2end_test.cc b/test/cpp/end2end/end2end_test.cc
index 28f8a8ec46033ce9cd14f180bb1812f7d965c323..82eb566908007f07b329d1b67d3550449f7e94a3 100644
--- a/test/cpp/end2end/end2end_test.cc
+++ b/test/cpp/end2end/end2end_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
@@ -34,9 +34,6 @@
 #include <mutex>
 #include <thread>
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
@@ -46,14 +43,17 @@
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
 #include "src/core/security/credentials.h"
+#include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/end2end/data/ssl_test_data.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
-#include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
-#include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/util/string_ref_helper.h"
 
 using grpc::testing::EchoRequest;
@@ -196,10 +196,10 @@ class TestAuthMetadataProcessor : public AuthMetadataProcessor {
 const char TestAuthMetadataProcessor::kGoodGuy[] = "Dr Jekyll";
 const char TestAuthMetadataProcessor::kIdentityPropName[] = "novel identity";
 
-class Proxy : public ::grpc::testing::TestService::Service {
+class Proxy : public ::grpc::testing::EchoTestService::Service {
  public:
   Proxy(std::shared_ptr<Channel> channel)
-      : stub_(grpc::testing::TestService::NewStub(channel)) {}
+      : stub_(grpc::testing::EchoTestService::NewStub(channel)) {}
 
   Status Echo(ServerContext* server_context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -209,10 +209,10 @@ class Proxy : public ::grpc::testing::TestService::Service {
   }
 
  private:
-  std::unique_ptr< ::grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr< ::grpc::testing::EchoTestService::Stub> stub_;
 };
 
-class TestServiceImpl : public ::grpc::testing::TestService::Service {
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
  public:
   TestServiceImpl() : signal_client_(false), host_() {}
   explicit TestServiceImpl(const grpc::string& host)
@@ -344,7 +344,7 @@ class TestServiceImpl : public ::grpc::testing::TestService::Service {
 };
 
 class TestServiceImplDupPkg
-    : public ::grpc::testing::duplicate::TestService::Service {
+    : public ::grpc::testing::duplicate::EchoTestService::Service {
  public:
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -435,12 +435,12 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
       channel_ = CreateChannel(proxyaddr.str(), InsecureChannelCredentials());
     }
 
-    stub_ = grpc::testing::TestService::NewStub(channel_);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
   bool is_server_started_;
   std::shared_ptr<Channel> channel_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   std::unique_ptr<Server> proxy_server_;
   std::unique_ptr<Proxy> proxy_service_;
@@ -451,7 +451,7 @@ class End2endTest : public ::testing::TestWithParam<TestScenario> {
   TestServiceImplDupPkg dup_pkg_service_;
 };
 
-static void SendRpc(grpc::testing::TestService::Stub* stub, int num_rpcs) {
+static void SendRpc(grpc::testing::EchoTestService::Stub* stub, int num_rpcs) {
   EchoRequest request;
   EchoResponse response;
   request.set_message("Hello hello hello hello");
@@ -561,8 +561,8 @@ TEST_P(End2endTest, DiffPackageServices) {
   EXPECT_EQ(response.message(), request.message());
   EXPECT_TRUE(s.ok());
 
-  std::unique_ptr<grpc::testing::duplicate::TestService::Stub> dup_pkg_stub(
-      grpc::testing::duplicate::TestService::NewStub(channel_));
+  std::unique_ptr<grpc::testing::duplicate::EchoTestService::Stub> dup_pkg_stub(
+      grpc::testing::duplicate::EchoTestService::NewStub(channel_));
   ClientContext context2;
   s = dup_pkg_stub->Echo(&context2, request, &response);
   EXPECT_EQ("no package", response.message());
@@ -1210,4 +1210,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/generic_end2end_test.cc b/test/cpp/end2end/generic_end2end_test.cc
index 14b534fbd20f257b05b9f948ddc1608dd0bd281d..c5d9de3f2944f2de60b685d1ff4f57b0a798eb6f 100644
--- a/test/cpp/end2end/generic_end2end_test.cc
+++ b/test/cpp/end2end/generic_end2end_test.cc
@@ -33,24 +33,24 @@
 
 #include <memory>
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
-#include <grpc++/impl/proto_utils.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/generic/async_generic_service.h>
 #include <grpc++/generic/generic_stub.h>
+#include <grpc++/impl/proto_utils.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
 #include <grpc++/support/slice.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
-#include "src/proto/grpc/testing/echo.grpc.pb.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -134,7 +134,7 @@ class GenericEnd2endTest : public ::testing::Test {
   void client_fail(int i) { verify_ok(&cli_cq_, i, false); }
 
   void SendRpc(int num_rpcs) {
-    const grpc::string kMethodName("/grpc.cpp.test.util.TestService/Echo");
+    const grpc::string kMethodName("/grpc.cpp.test.util.EchoTestService/Echo");
     for (int i = 0; i < num_rpcs; i++) {
       EchoRequest send_request;
       EchoRequest recv_request;
@@ -193,7 +193,7 @@ class GenericEnd2endTest : public ::testing::Test {
 
   CompletionQueue cli_cq_;
   std::unique_ptr<ServerCompletionQueue> srv_cq_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<grpc::GenericStub> generic_stub_;
   std::unique_ptr<Server> server_;
   AsyncGenericService generic_service_;
@@ -215,7 +215,8 @@ TEST_F(GenericEnd2endTest, SequentialRpcs) {
 TEST_F(GenericEnd2endTest, SimpleBidiStreaming) {
   ResetStub();
 
-  const grpc::string kMethodName("/grpc.cpp.test.util.TestService/BidiStream");
+  const grpc::string kMethodName(
+      "/grpc.cpp.test.util.EchoTestService/BidiStream");
   EchoRequest send_request;
   EchoRequest recv_request;
   EchoResponse send_response;
diff --git a/test/cpp/end2end/mock_test.cc b/test/cpp/end2end/mock_test.cc
index dddd1d0a2e82f82e50737e3f19f17e72de70068a..d08ed9bcc5481ce2af98ca417c3f90e14ad4075c 100644
--- a/test/cpp/end2end/mock_test.cc
+++ b/test/cpp/end2end/mock_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
@@ -33,25 +33,25 @@
 
 #include <thread>
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
-using grpc::testing::TestService;
+using grpc::testing::EchoTestService;
 using std::chrono::system_clock;
 
 namespace grpc {
@@ -98,7 +98,7 @@ class MockClientReaderWriter<EchoRequest, EchoResponse> GRPC_FINAL
 };
 
 // Mocked stub.
-class MockStub : public TestService::StubInterface {
+class MockStub : public EchoTestService::StubInterface {
  public:
   MockStub() {}
   ~MockStub() {}
@@ -154,7 +154,7 @@ class MockStub : public TestService::StubInterface {
 
 class FakeClient {
  public:
-  explicit FakeClient(TestService::StubInterface* stub) : stub_(stub) {}
+  explicit FakeClient(EchoTestService::StubInterface* stub) : stub_(stub) {}
 
   void DoEcho() {
     ClientContext context;
@@ -197,13 +197,13 @@ class FakeClient {
     EXPECT_TRUE(s.ok());
   }
 
-  void ResetStub(TestService::StubInterface* stub) { stub_ = stub; }
+  void ResetStub(EchoTestService::StubInterface* stub) { stub_ = stub; }
 
  private:
-  TestService::StubInterface* stub_;
+  EchoTestService::StubInterface* stub_;
 };
 
-class TestServiceImpl : public TestService::Service {
+class TestServiceImpl : public EchoTestService::Service {
  public:
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -245,10 +245,10 @@ class MockTest : public ::testing::Test {
   void ResetStub() {
     std::shared_ptr<Channel> channel =
         CreateChannel(server_address_.str(), InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel);
   }
 
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   TestServiceImpl service_;
@@ -281,4 +281,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/server_crash_test.cc b/test/cpp/end2end/server_crash_test.cc
index 87ce6369d227451b7bd712431dc001cbaa03bde6..c29bc7c44f21e07bc3765b428812d47279b1596e 100644
--- a/test/cpp/end2end/server_crash_test.cc
+++ b/test/cpp/end2end/server_crash_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
@@ -31,21 +31,21 @@
  *
  */
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
+#include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
-#include "src/proto/grpc/testing/echo.grpc.pb.h"
-#include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "test/cpp/util/subprocess.h"
 
 using grpc::testing::EchoRequest;
@@ -59,7 +59,8 @@ namespace testing {
 
 namespace {
 
-class ServiceImpl GRPC_FINAL : public ::grpc::testing::TestService::Service {
+class ServiceImpl GRPC_FINAL
+    : public ::grpc::testing::EchoTestService::Service {
  public:
   ServiceImpl() : bidi_stream_count_(0), response_stream_count_(0) {}
 
@@ -170,4 +171,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/server_crash_test_client.cc b/test/cpp/end2end/server_crash_test_client.cc
index b349ae7357e1180bea6df9cecb2e960e41e443e5..3a99ab360e62d40619c5c8586c95b782d893a6bf 100644
--- a/test/cpp/end2end/server_crash_test_client.cc
+++ b/test/cpp/end2end/server_crash_test_client.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
@@ -31,11 +31,11 @@
  *
  */
 
+#include <gflags/gflags.h>
 #include <iostream>
 #include <memory>
 #include <sstream>
 #include <string>
-#include <gflags/gflags.h>
 
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
@@ -57,7 +57,7 @@ using namespace gflags;
 
 int main(int argc, char** argv) {
   ParseCommandLineFlags(&argc, &argv, true);
-  auto stub = grpc::testing::TestService::NewStub(
+  auto stub = grpc::testing::EchoTestService::NewStub(
       grpc::CreateChannel(FLAGS_address, grpc::InsecureChannelCredentials()));
 
   EchoRequest request;
@@ -87,4 +87,4 @@ int main(int argc, char** argv) {
   }
 
   return 0;
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/shutdown_test.cc b/test/cpp/end2end/shutdown_test.cc
index 50d4f6dca39e0a084b824402b5e9cbc5cae02370..c03cf9fef33eb4687b0f7e8e39463d7795245721 100644
--- a/test/cpp/end2end/shutdown_test.cc
+++ b/test/cpp/end2end/shutdown_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
@@ -33,20 +33,20 @@
 
 #include <thread>
 
-#include <grpc/grpc.h>
-#include <grpc/support/sync.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/sync.h>
 #include <gtest/gtest.h>
 
 #include "src/core/support/env.h"
-#include "test/core/util/test_config.h"
-#include "test/core/util/port.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -54,7 +54,7 @@ using grpc::testing::EchoResponse;
 namespace grpc {
 namespace testing {
 
-class TestServiceImpl : public ::grpc::testing::TestService::Service {
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
  public:
   explicit TestServiceImpl(gpr_event* ev) : ev_(ev) {}
 
@@ -94,7 +94,7 @@ class ShutdownTest : public ::testing::Test {
   void ResetStub() {
     string target = "dns:localhost:" + to_string(port_);
     channel_ = CreateChannel(target, InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel_);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
   string to_string(const int number) {
@@ -115,7 +115,7 @@ class ShutdownTest : public ::testing::Test {
 
  protected:
   std::shared_ptr<Channel> channel_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   bool shutdown_;
   int port_;
@@ -152,4 +152,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/streaming_throughput_test.cc b/test/cpp/end2end/streaming_throughput_test.cc
index ca563472a72c8a8c3147e39d6ff530a16ce958bc..ef2b53f36f3930b8b1a5e7aff335385bd2c33716 100644
--- a/test/cpp/end2end/streaming_throughput_test.cc
+++ b/test/cpp/end2end/streaming_throughput_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
@@ -31,9 +31,9 @@
  *
  */
 
+#include <time.h>
 #include <mutex>
 #include <thread>
-#include <time.h>
 
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
@@ -49,10 +49,10 @@
 #include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -99,7 +99,7 @@ const char* kLargeString =
 namespace grpc {
 namespace testing {
 
-class TestServiceImpl : public ::grpc::testing::TestService::Service {
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
  public:
   static void BidiStream_Sender(
       ServerReaderWriter<EchoResponse, EchoRequest>* stream,
@@ -161,10 +161,10 @@ class End2endTest : public ::testing::Test {
   void ResetStub() {
     std::shared_ptr<Channel> channel =
         CreateChannel(server_address_.str(), InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel);
   }
 
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   TestServiceImpl service_;
@@ -204,4 +204,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/thread_stress_test.cc b/test/cpp/end2end/thread_stress_test.cc
index 8efc645fa390a8e7784ae13432489a27f597ffa0..592c427d5d80b84b603ef6e9e0693a78dd464fb4 100644
--- a/test/cpp/end2end/thread_stress_test.cc
+++ b/test/cpp/end2end/thread_stress_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
@@ -34,21 +34,21 @@
 #include <mutex>
 #include <thread>
 
-#include <grpc/grpc.h>
-#include <grpc/support/thd.h>
-#include <grpc/support/time.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/create_channel.h>
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
+#include <grpc/grpc.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
 #include <gtest/gtest.h>
 
-#include "test/core/util/port.h"
-#include "test/core/util/test_config.h"
 #include "src/proto/grpc/testing/duplicate/echo_duplicate.grpc.pb.h"
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -74,7 +74,7 @@ void MaybeEchoDeadline(ServerContext* context, const EchoRequest* request,
 
 }  // namespace
 
-class TestServiceImpl : public ::grpc::testing::TestService::Service {
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
  public:
   TestServiceImpl() : signal_client_(false) {}
 
@@ -159,7 +159,7 @@ class TestServiceImpl : public ::grpc::testing::TestService::Service {
 };
 
 class TestServiceImplDupPkg
-    : public ::grpc::testing::duplicate::TestService::Service {
+    : public ::grpc::testing::duplicate::EchoTestService::Service {
  public:
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -191,10 +191,10 @@ class End2endTest : public ::testing::Test {
   void ResetStub() {
     std::shared_ptr<Channel> channel =
         CreateChannel(server_address_.str(), InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel);
   }
 
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   const int kMaxMessageSize_;
@@ -202,7 +202,7 @@ class End2endTest : public ::testing::Test {
   TestServiceImplDupPkg dup_pkg_service_;
 };
 
-static void SendRpc(grpc::testing::TestService::Stub* stub, int num_rpcs) {
+static void SendRpc(grpc::testing::EchoTestService::Stub* stub, int num_rpcs) {
   EchoRequest request;
   EchoResponse response;
   request.set_message("Hello");
@@ -234,4 +234,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/end2end/zookeeper_test.cc b/test/cpp/end2end/zookeeper_test.cc
index 802df6bb9406fc4dc1d39bc303f3c7e4ff9171d9..cec6e891be7e9b8e80f5a3122c3f95f77e9f7eb3 100644
--- a/test/cpp/end2end/zookeeper_test.cc
+++ b/test/cpp/end2end/zookeeper_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
@@ -37,15 +37,15 @@
 #include <grpc++/server.h>
 #include <grpc++/server_builder.h>
 #include <grpc++/server_context.h>
-#include <gtest/gtest.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_zookeeper.h>
+#include <gtest/gtest.h>
 #include <zookeeper/zookeeper.h>
 
-#include "test/core/util/test_config.h"
-#include "test/core/util/port.h"
-#include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "src/core/support/env.h"
+#include "src/proto/grpc/testing/echo.grpc.pb.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
@@ -53,7 +53,8 @@ using grpc::testing::EchoResponse;
 namespace grpc {
 namespace testing {
 
-class ZookeeperTestServiceImpl : public ::grpc::testing::TestService::Service {
+class ZookeeperTestServiceImpl
+    : public ::grpc::testing::EchoTestService::Service {
  public:
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -157,7 +158,7 @@ class ZookeeperTest : public ::testing::Test {
   void ResetStub() {
     string target = "zookeeper://" + zookeeper_address_ + "/test";
     channel_ = CreateChannel(target, InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel_);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
   string to_string(const int number) {
@@ -167,7 +168,7 @@ class ZookeeperTest : public ::testing::Test {
   }
 
   std::shared_ptr<Channel> channel_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server1_;
   std::unique_ptr<Server> server2_;
   ZookeeperTestServiceImpl service_;
@@ -215,4 +216,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/test/cpp/qps/client.h b/test/cpp/qps/client.h
index ee0049578d3706f125982c0fc12a648ff105d179..0159f4f1e67e2114503cdaf598153314c33dc72b 100644
--- a/test/cpp/qps/client.h
+++ b/test/cpp/qps/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
@@ -37,6 +37,9 @@
 #include <condition_variable>
 #include <mutex>
 
+#include <grpc++/support/byte_buffer.h>
+#include <grpc++/support/slice.h>
+
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/interarrival.h"
 #include "test/cpp/qps/timer.h"
@@ -66,37 +69,64 @@ namespace testing {
 typedef std::chrono::high_resolution_clock grpc_time_source;
 typedef std::chrono::time_point<grpc_time_source> grpc_time;
 
-class Client {
+template <class RequestType>
+class ClientRequestCreator {
  public:
-  explicit Client(const ClientConfig& config)
-      : channels_(config.client_channels()),
-        timer_(new Timer),
-        interarrival_timer_() {
-    for (int i = 0; i < config.client_channels(); i++) {
-      channels_[i].init(config.server_targets(i % config.server_targets_size()),
-                        config);
-    }
-    if (config.payload_config().has_bytebuf_params()) {
-      GPR_ASSERT(false);  // not yet implemented
-    } else if (config.payload_config().has_simple_params()) {
-      request_.set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
-      request_.set_response_size(
-          config.payload_config().simple_params().resp_size());
-      request_.mutable_payload()->set_type(
+  ClientRequestCreator(RequestType* req, const PayloadConfig&) {
+    // this template must be specialized
+    // fail with an assertion rather than a compile-time
+    // check since these only happen at the beginning anyway
+    GPR_ASSERT(false);
+  }
+};
+
+template <>
+class ClientRequestCreator<SimpleRequest> {
+ public:
+  ClientRequestCreator(SimpleRequest* req,
+                       const PayloadConfig& payload_config) {
+    if (payload_config.has_bytebuf_params()) {
+      GPR_ASSERT(false);  // not appropriate for this specialization
+    } else if (payload_config.has_simple_params()) {
+      req->set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
+      req->set_response_size(payload_config.simple_params().resp_size());
+      req->mutable_payload()->set_type(
           grpc::testing::PayloadType::COMPRESSABLE);
-      int size = config.payload_config().simple_params().req_size();
+      int size = payload_config.simple_params().req_size();
       std::unique_ptr<char[]> body(new char[size]);
-      request_.mutable_payload()->set_body(body.get(), size);
-    } else if (config.payload_config().has_complex_params()) {
-      GPR_ASSERT(false);  // not yet implemented
+      req->mutable_payload()->set_body(body.get(), size);
+    } else if (payload_config.has_complex_params()) {
+      GPR_ASSERT(false);  // not appropriate for this specialization
     } else {
       // default should be simple proto without payloads
-      request_.set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
-      request_.set_response_size(0);
-      request_.mutable_payload()->set_type(
+      req->set_response_type(grpc::testing::PayloadType::COMPRESSABLE);
+      req->set_response_size(0);
+      req->mutable_payload()->set_type(
           grpc::testing::PayloadType::COMPRESSABLE);
     }
   }
+};
+
+template <>
+class ClientRequestCreator<ByteBuffer> {
+ public:
+  ClientRequestCreator(ByteBuffer* req, const PayloadConfig& payload_config) {
+    if (payload_config.has_bytebuf_params()) {
+      std::unique_ptr<char> buf(
+          new char[payload_config.bytebuf_params().req_size()]);
+      gpr_slice s = gpr_slice_from_copied_buffer(
+          buf.get(), payload_config.bytebuf_params().req_size());
+      Slice slice(s, Slice::STEAL_REF);
+      *req = ByteBuffer(&slice, 1);
+    } else {
+      GPR_ASSERT(false);  // not appropriate for this specialization
+    }
+  }
+};
+
+class Client {
+ public:
+  Client() : timer_(new Timer), interarrival_timer_() {}
   virtual ~Client() {}
 
   ClientStats Mark(bool reset) {
@@ -134,37 +164,8 @@ class Client {
   }
 
  protected:
-  SimpleRequest request_;
   bool closed_loop_;
 
-  class ClientChannelInfo {
-   public:
-    ClientChannelInfo() {}
-    ClientChannelInfo(const ClientChannelInfo& i) {
-      // The copy constructor is to satisfy old compilers
-      // that need it for using std::vector . It is only ever
-      // used for empty entries
-      GPR_ASSERT(!i.channel_ && !i.stub_);
-    }
-    void init(const grpc::string& target, const ClientConfig& config) {
-      // We have to use a 2-phase init like this with a default
-      // constructor followed by an initializer function to make
-      // old compilers happy with using this in std::vector
-      channel_ = CreateTestChannel(
-          target, config.security_params().server_host_override(),
-          config.has_security_params(),
-          !config.security_params().use_test_ca());
-      stub_ = BenchmarkService::NewStub(channel_);
-    }
-    Channel* get_channel() { return channel_.get(); }
-    BenchmarkService::Stub* get_stub() { return stub_.get(); }
-
-   private:
-    std::shared_ptr<Channel> channel_;
-    std::unique_ptr<BenchmarkService::Stub> stub_;
-  };
-  std::vector<ClientChannelInfo> channels_;
-
   void StartThreads(size_t num_threads) {
     for (size_t i = 0; i < num_threads; i++) {
       threads_.emplace_back(new Thread(this, i));
@@ -295,8 +296,6 @@ class Client {
       }
     }
 
-    BenchmarkService::Stub* stub_;
-    ClientConfig config_;
     std::mutex mu_;
     std::condition_variable cv_;
     bool done_;
@@ -314,13 +313,68 @@ class Client {
   std::vector<grpc_time> next_time_;
 };
 
+template <class StubType, class RequestType>
+class ClientImpl : public Client {
+ public:
+  ClientImpl(const ClientConfig& config,
+             std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
+                 create_stub)
+      : channels_(config.client_channels()), create_stub_(create_stub) {
+    for (int i = 0; i < config.client_channels(); i++) {
+      channels_[i].init(config.server_targets(i % config.server_targets_size()),
+                        config, create_stub_);
+    }
+
+    ClientRequestCreator<RequestType> create_req(&request_,
+                                                 config.payload_config());
+  }
+  virtual ~ClientImpl() {}
+
+ protected:
+  RequestType request_;
+
+  class ClientChannelInfo {
+   public:
+    ClientChannelInfo() {}
+    ClientChannelInfo(const ClientChannelInfo& i) {
+      // The copy constructor is to satisfy old compilers
+      // that need it for using std::vector . It is only ever
+      // used for empty entries
+      GPR_ASSERT(!i.channel_ && !i.stub_);
+    }
+    void init(const grpc::string& target, const ClientConfig& config,
+              std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
+                  create_stub) {
+      // We have to use a 2-phase init like this with a default
+      // constructor followed by an initializer function to make
+      // old compilers happy with using this in std::vector
+      channel_ = CreateTestChannel(
+          target, config.security_params().server_host_override(),
+          config.has_security_params(),
+          !config.security_params().use_test_ca());
+      stub_ = create_stub(channel_);
+    }
+    Channel* get_channel() { return channel_.get(); }
+    StubType* get_stub() { return stub_.get(); }
+
+   private:
+    std::shared_ptr<Channel> channel_;
+    std::unique_ptr<StubType> stub_;
+  };
+  std::vector<ClientChannelInfo> channels_;
+  std::function<std::unique_ptr<StubType>(const std::shared_ptr<Channel>&)>
+      create_stub_;
+};
+
 std::unique_ptr<Client> CreateSynchronousUnaryClient(const ClientConfig& args);
 std::unique_ptr<Client> CreateSynchronousStreamingClient(
     const ClientConfig& args);
 std::unique_ptr<Client> CreateAsyncUnaryClient(const ClientConfig& args);
 std::unique_ptr<Client> CreateAsyncStreamingClient(const ClientConfig& args);
+std::unique_ptr<Client> CreateGenericAsyncStreamingClient(
+    const ClientConfig& args);
 
 }  // namespace testing
 }  // namespace grpc
 
-#endif
+#endif
\ No newline at end of file
diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 3aaf06564ca4d24d686149577922b33f18abee3d..3e2317c6d460f067c88cbd53a1990fbaea9083cf 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.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
@@ -37,19 +37,20 @@
 #include <list>
 #include <memory>
 #include <mutex>
+#include <sstream>
 #include <string>
 #include <thread>
 #include <vector>
-#include <sstream>
 
+#include <gflags/gflags.h>
+#include <grpc++/client_context.h>
+#include <grpc++/generic/generic_stub.h>
 #include <grpc/grpc.h>
 #include <grpc/support/histogram.h>
 #include <grpc/support/log.h>
-#include <gflags/gflags.h>
-#include <grpc++/client_context.h>
 
-#include "test/cpp/qps/timer.h"
 #include "test/cpp/qps/client.h"
+#include "test/cpp/qps/timer.h"
 #include "test/cpp/util/create_test_channel.h"
 #include "src/proto/grpc/testing/services.grpc.pb.h"
 
@@ -147,13 +148,22 @@ class ClientRpcContextUnaryImpl : public ClientRpcContext {
 
 typedef std::forward_list<ClientRpcContext*> context_list;
 
-class AsyncClient : public Client {
+template <class StubType, class RequestType>
+class AsyncClient : public ClientImpl<StubType, RequestType> {
+  // Specify which protected members we are using since there is no
+  // member name resolution until the template types are fully resolved
  public:
-  explicit AsyncClient(
-      const ClientConfig& config,
-      std::function<ClientRpcContext*(int, BenchmarkService::Stub*,
-                                      const SimpleRequest&)> setup_ctx)
-      : Client(config),
+  using Client::SetupLoadTest;
+  using Client::NextIssueTime;
+  using Client::closed_loop_;
+  using ClientImpl<StubType, RequestType>::channels_;
+  using ClientImpl<StubType, RequestType>::request_;
+  AsyncClient(const ClientConfig& config,
+              std::function<ClientRpcContext*(int, StubType*,
+                                              const RequestType&)> setup_ctx,
+              std::function<std::unique_ptr<StubType>(std::shared_ptr<Channel>)>
+                  create_stub)
+      : ClientImpl<StubType, RequestType>(config, create_stub),
         channel_lock_(new std::mutex[config.client_channels()]),
         contexts_(config.client_channels()),
         max_outstanding_per_channel_(config.outstanding_rpcs_per_channel()),
@@ -343,10 +353,16 @@ class AsyncClient : public Client {
   int pref_channel_inc_;
 };
 
-class AsyncUnaryClient GRPC_FINAL : public AsyncClient {
+static std::unique_ptr<BenchmarkService::Stub> BenchmarkStubCreator(
+    std::shared_ptr<Channel> ch) {
+  return BenchmarkService::NewStub(ch);
+}
+
+class AsyncUnaryClient GRPC_FINAL
+    : public AsyncClient<BenchmarkService::Stub, SimpleRequest> {
  public:
   explicit AsyncUnaryClient(const ClientConfig& config)
-      : AsyncClient(config, SetupCtx) {
+      : AsyncClient(config, SetupCtx, BenchmarkStubCreator) {
     StartThreads(config.async_client_threads());
   }
   ~AsyncUnaryClient() GRPC_OVERRIDE { EndThreads(); }
@@ -437,10 +453,11 @@ class ClientRpcContextStreamingImpl : public ClientRpcContext {
       stream_;
 };
 
-class AsyncStreamingClient GRPC_FINAL : public AsyncClient {
+class AsyncStreamingClient GRPC_FINAL
+    : public AsyncClient<BenchmarkService::Stub, SimpleRequest> {
  public:
   explicit AsyncStreamingClient(const ClientConfig& config)
-      : AsyncClient(config, SetupCtx) {
+      : AsyncClient(config, SetupCtx, BenchmarkStubCreator) {
     // async streaming currently only supports closed loop
     GPR_ASSERT(closed_loop_);
 
@@ -467,12 +484,119 @@ class AsyncStreamingClient GRPC_FINAL : public AsyncClient {
   }
 };
 
+class ClientRpcContextGenericStreamingImpl : public ClientRpcContext {
+ public:
+  ClientRpcContextGenericStreamingImpl(
+      int channel_id, grpc::GenericStub* stub, const ByteBuffer& req,
+      std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
+          grpc::GenericStub*, grpc::ClientContext*,
+          const grpc::string& method_name, CompletionQueue*, void*)> start_req,
+      std::function<void(grpc::Status, ByteBuffer*)> on_done)
+      : ClientRpcContext(channel_id),
+        context_(),
+        stub_(stub),
+        req_(req),
+        response_(),
+        next_state_(&ClientRpcContextGenericStreamingImpl::ReqSent),
+        callback_(on_done),
+        start_req_(start_req),
+        start_(Timer::Now()) {}
+  ~ClientRpcContextGenericStreamingImpl() GRPC_OVERRIDE {}
+  bool RunNextState(bool ok, Histogram* hist) GRPC_OVERRIDE {
+    return (this->*next_state_)(ok, hist);
+  }
+  ClientRpcContext* StartNewClone() GRPC_OVERRIDE {
+    return new ClientRpcContextGenericStreamingImpl(channel_id_, stub_, req_,
+                                                    start_req_, callback_);
+  }
+  void Start(CompletionQueue* cq) GRPC_OVERRIDE {
+    const grpc::string kMethodName(
+        "/grpc.testing.BenchmarkService/StreamingCall");
+    stream_ = start_req_(stub_, &context_, kMethodName, cq,
+                         ClientRpcContext::tag(this));
+  }
+
+ private:
+  bool ReqSent(bool ok, Histogram*) { return StartWrite(ok); }
+  bool StartWrite(bool ok) {
+    if (!ok) {
+      return (false);
+    }
+    start_ = Timer::Now();
+    next_state_ = &ClientRpcContextGenericStreamingImpl::WriteDone;
+    stream_->Write(req_, ClientRpcContext::tag(this));
+    return true;
+  }
+  bool WriteDone(bool ok, Histogram*) {
+    if (!ok) {
+      return (false);
+    }
+    next_state_ = &ClientRpcContextGenericStreamingImpl::ReadDone;
+    stream_->Read(&response_, ClientRpcContext::tag(this));
+    return true;
+  }
+  bool ReadDone(bool ok, Histogram* hist) {
+    hist->Add((Timer::Now() - start_) * 1e9);
+    return StartWrite(ok);
+  }
+  grpc::ClientContext context_;
+  grpc::GenericStub* stub_;
+  ByteBuffer req_;
+  ByteBuffer response_;
+  bool (ClientRpcContextGenericStreamingImpl::*next_state_)(bool, Histogram*);
+  std::function<void(grpc::Status, ByteBuffer*)> callback_;
+  std::function<std::unique_ptr<grpc::GenericClientAsyncReaderWriter>(
+      grpc::GenericStub*, grpc::ClientContext*, const grpc::string&,
+      CompletionQueue*, void*)> start_req_;
+  grpc::Status status_;
+  double start_;
+  std::unique_ptr<grpc::GenericClientAsyncReaderWriter> stream_;
+};
+
+static std::unique_ptr<grpc::GenericStub> GenericStubCreator(
+    std::shared_ptr<Channel> ch) {
+  return std::unique_ptr<grpc::GenericStub>(new grpc::GenericStub(ch));
+}
+
+class GenericAsyncStreamingClient GRPC_FINAL
+    : public AsyncClient<grpc::GenericStub, ByteBuffer> {
+ public:
+  explicit GenericAsyncStreamingClient(const ClientConfig& config)
+      : AsyncClient(config, SetupCtx, GenericStubCreator) {
+    // async streaming currently only supports closed loop
+    GPR_ASSERT(closed_loop_);
+
+    StartThreads(config.async_client_threads());
+  }
+
+  ~GenericAsyncStreamingClient() GRPC_OVERRIDE { EndThreads(); }
+
+ private:
+  static void CheckDone(grpc::Status s, ByteBuffer* response) {}
+  static std::unique_ptr<grpc::GenericClientAsyncReaderWriter> StartReq(
+      grpc::GenericStub* stub, grpc::ClientContext* ctx,
+      const grpc::string& method_name, CompletionQueue* cq, void* tag) {
+    auto stream = stub->Call(ctx, method_name, cq, tag);
+    return stream;
+  };
+  static ClientRpcContext* SetupCtx(int channel_id, grpc::GenericStub* stub,
+                                    const ByteBuffer& req) {
+    return new ClientRpcContextGenericStreamingImpl(
+        channel_id, stub, req, GenericAsyncStreamingClient::StartReq,
+        GenericAsyncStreamingClient::CheckDone);
+  }
+};
+
 std::unique_ptr<Client> CreateAsyncUnaryClient(const ClientConfig& args) {
   return std::unique_ptr<Client>(new AsyncUnaryClient(args));
 }
 std::unique_ptr<Client> CreateAsyncStreamingClient(const ClientConfig& args) {
   return std::unique_ptr<Client>(new AsyncStreamingClient(args));
 }
+std::unique_ptr<Client> CreateGenericAsyncStreamingClient(
+    const ClientConfig& args) {
+  return std::unique_ptr<Client>(new GenericAsyncStreamingClient(args));
+}
 
 }  // namespace testing
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/test/cpp/qps/client_sync.cc b/test/cpp/qps/client_sync.cc
index 9e94f43e35162e852ac690093ee59955a255650e..1045915b8327a95c2f4938dcbef3d808c19763f6 100644
--- a/test/cpp/qps/client_sync.cc
+++ b/test/cpp/qps/client_sync.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
@@ -35,38 +35,44 @@
 #include <chrono>
 #include <memory>
 #include <mutex>
+#include <sstream>
 #include <string>
 #include <thread>
 #include <vector>
-#include <sstream>
 
 #include <gflags/gflags.h>
+#include <grpc++/client_context.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/histogram.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
-#include <grpc++/client_context.h>
-#include <grpc++/server.h>
-#include <grpc++/server_builder.h>
 #include <gtest/gtest.h>
 
-#include "test/cpp/util/create_test_channel.h"
+#include "src/core/profiling/timers.h"
+#include "src/proto/grpc/testing/services.grpc.pb.h"
 #include "test/cpp/qps/client.h"
 #include "test/cpp/qps/histogram.h"
 #include "test/cpp/qps/interarrival.h"
 #include "test/cpp/qps/timer.h"
-#include "src/proto/grpc/testing/services.grpc.pb.h"
-
-#include "src/core/profiling/timers.h"
 
 namespace grpc {
 namespace testing {
 
-class SynchronousClient : public Client {
+static std::unique_ptr<BenchmarkService::Stub> BenchmarkStubCreator(
+    std::shared_ptr<Channel> ch) {
+  return BenchmarkService::NewStub(ch);
+}
+
+class SynchronousClient
+    : public ClientImpl<BenchmarkService::Stub, SimpleRequest> {
  public:
-  SynchronousClient(const ClientConfig& config) : Client(config) {
+  SynchronousClient(const ClientConfig& config)
+      : ClientImpl<BenchmarkService::Stub, SimpleRequest>(
+            config, BenchmarkStubCreator) {
     num_threads_ =
         config.outstanding_rpcs_per_channel() * config.client_channels();
     responses_.resize(num_threads_);
@@ -166,4 +172,4 @@ std::unique_ptr<Client> CreateSynchronousStreamingClient(
 }
 
 }  // namespace testing
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/test/cpp/qps/generic_async_streaming_ping_pong_test.cc b/test/cpp/qps/generic_async_streaming_ping_pong_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7a1275054a6747e10769547413e6a1832a6edb87
--- /dev/null
+++ b/test/cpp/qps/generic_async_streaming_ping_pong_test.cc
@@ -0,0 +1,82 @@
+/*
+ *
+ * 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 <set>
+
+#include <grpc/support/log.h>
+
+#include "test/cpp/qps/driver.h"
+#include "test/cpp/qps/report.h"
+#include "test/cpp/util/benchmark_config.h"
+
+namespace grpc {
+namespace testing {
+
+static const int WARMUP = 5;
+static const int BENCHMARK = 10;
+
+static void RunGenericAsyncStreamingPingPong() {
+  gpr_log(GPR_INFO, "Running Generic Async Streaming Ping Pong");
+
+  ClientConfig client_config;
+  client_config.set_client_type(ASYNC_CLIENT);
+  client_config.set_outstanding_rpcs_per_channel(1);
+  client_config.set_client_channels(1);
+  client_config.set_async_client_threads(1);
+  client_config.set_rpc_type(STREAMING);
+  client_config.mutable_load_params()->mutable_closed_loop();
+  auto bbuf = client_config.mutable_payload_config()->mutable_bytebuf_params();
+  bbuf->set_resp_size(0);
+  bbuf->set_req_size(0);
+
+  ServerConfig server_config;
+  server_config.set_server_type(ASYNC_SERVER);
+  server_config.set_host("localhost");
+  server_config.set_async_server_threads(1);
+
+  const auto result =
+      RunScenario(client_config, 1, server_config, 1, WARMUP, BENCHMARK, -2);
+
+  GetReporter()->ReportQPS(*result);
+  GetReporter()->ReportLatency(*result);
+}
+
+}  // namespace testing
+}  // namespace grpc
+
+int main(int argc, char** argv) {
+  grpc::testing::InitBenchmark(&argc, &argv, true);
+
+  grpc::testing::RunGenericAsyncStreamingPingPong();
+  return 0;
+}
\ No newline at end of file
diff --git a/test/cpp/qps/qps_driver.cc b/test/cpp/qps/qps_driver.cc
index c7096391e63a3f18c768419575faaf8aba55008a..c70db188d9c93b847f2c796554fc060a32b3b6b0 100644
--- a/test/cpp/qps/qps_driver.cc
+++ b/test/cpp/qps/qps_driver.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
@@ -62,6 +62,8 @@ DEFINE_int32(client_channels, 1, "Number of client channels");
 
 DEFINE_int32(simple_req_size, -1, "Simple proto request payload size");
 DEFINE_int32(simple_resp_size, -1, "Simple proto response payload size");
+DEFINE_int32(bbuf_req_size, -1, "Byte-buffer request payload size");
+DEFINE_int32(bbuf_resp_size, -1, "Byte-buffer response payload size");
 
 DEFINE_string(client_type, "SYNC_CLIENT", "Client type");
 DEFINE_int32(async_client_threads, 1, "Async client threads");
@@ -109,6 +111,13 @@ static void QpsDriver() {
     if (FLAGS_simple_req_size >= 0) {
       params->set_req_size(FLAGS_simple_req_size);
     }
+  } else if (FLAGS_bbuf_resp_size >= 0) {
+    auto params =
+        client_config.mutable_payload_config()->mutable_bytebuf_params();
+    params->set_resp_size(FLAGS_bbuf_resp_size);
+    if (FLAGS_bbuf_req_size >= 0) {
+      params->set_req_size(FLAGS_bbuf_req_size);
+    }
   } else {
     // set a reasonable default: proto but no payload
     client_config.mutable_payload_config()->mutable_simple_params();
@@ -175,4 +184,4 @@ int main(int argc, char** argv) {
   grpc::testing::QpsDriver();
 
   return 0;
-}
+}
\ No newline at end of file
diff --git a/test/cpp/qps/qps_worker.cc b/test/cpp/qps/qps_worker.cc
index b3f383253f77a4426d2726bff6da88302149d026..e7714c0bb30f75b3dc442537aa86daaa8daee44a 100644
--- a/test/cpp/qps/qps_worker.cc
+++ b/test/cpp/qps/qps_worker.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
@@ -36,20 +36,20 @@
 #include <cassert>
 #include <memory>
 #include <mutex>
+#include <sstream>
 #include <string>
 #include <thread>
 #include <vector>
-#include <sstream>
 
+#include <grpc++/client_context.h>
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/histogram.h>
-#include <grpc/support/log.h>
 #include <grpc/support/host_port.h>
-#include <grpc++/client_context.h>
-#include <grpc++/server.h>
-#include <grpc++/server_builder.h>
-#include <grpc++/security/server_credentials.h>
+#include <grpc/support/log.h>
 
 #include "test/core/util/grpc_profiler.h"
 #include "test/cpp/qps/client.h"
@@ -69,7 +69,9 @@ static std::unique_ptr<Client> CreateClient(const ClientConfig& config) {
     case ClientType::ASYNC_CLIENT:
       return (config.rpc_type() == RpcType::UNARY)
                  ? CreateAsyncUnaryClient(config)
-                 : CreateAsyncStreamingClient(config);
+                 : (config.payload_config().has_bytebuf_params()
+                        ? CreateGenericAsyncStreamingClient(config)
+                        : CreateAsyncStreamingClient(config));
     default:
       abort();
   }
@@ -237,4 +239,4 @@ QpsWorker::QpsWorker(int driver_port) {
 QpsWorker::~QpsWorker() {}
 
 }  // namespace testing
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/test/cpp/qps/server.h b/test/cpp/qps/server.h
index 620bc32f4b44a4601ae886a8469993323392d063..daee7c36634a2c1255c33c0900e583cf0e1b3999 100644
--- a/test/cpp/qps/server.h
+++ b/test/cpp/qps/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
@@ -75,12 +75,11 @@ class Server {
   }
 
   static bool SetPayload(PayloadType type, int size, Payload* payload) {
-    PayloadType response_type = type;
     // TODO(yangg): Support UNCOMPRESSABLE payload.
     if (type != PayloadType::COMPRESSABLE) {
       return false;
     }
-    payload->set_type(response_type);
+    payload->set_type(type);
     std::unique_ptr<char[]> body(new char[size]());
     payload->set_body(body.get(), size);
     return true;
@@ -113,4 +112,4 @@ std::unique_ptr<Server> CreateAsyncServer(const ServerConfig& config);
 }  // namespace testing
 }  // namespace grpc
 
-#endif
+#endif
\ No newline at end of file
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index 03fde06e77f23e31becc0ee091643d21c3300d4f..1ae88d7323e9e7a8c7adbc5f427e45bd93ebc1ef 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.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
@@ -38,15 +38,16 @@
 #include <thread>
 
 #include <gflags/gflags.h>
+#include <grpc++/generic/async_generic_service.h>
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc++/server_context.h>
+#include <grpc++/support/config.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
-#include <grpc++/support/config.h>
-#include <grpc++/server.h>
-#include <grpc++/server_builder.h>
-#include <grpc++/server_context.h>
-#include <grpc++/security/server_credentials.h>
 #include <gtest/gtest.h>
 
 #include "test/cpp/qps/server.h"
@@ -55,9 +56,24 @@
 namespace grpc {
 namespace testing {
 
+template <class RequestType, class ResponseType, class ServiceType,
+          class ServerContextType>
 class AsyncQpsServerTest : public Server {
  public:
-  explicit AsyncQpsServerTest(const ServerConfig &config) : Server(config) {
+  AsyncQpsServerTest(
+      const ServerConfig &config,
+      std::function<void(ServerBuilder *, ServiceType *)> register_service,
+      std::function<void(ServiceType *, ServerContextType *, RequestType *,
+                         ServerAsyncResponseWriter<ResponseType> *,
+                         CompletionQueue *, ServerCompletionQueue *, void *)>
+          request_unary_function,
+      std::function<void(ServiceType *, ServerContextType *,
+                         ServerAsyncReaderWriter<ResponseType, RequestType> *,
+                         CompletionQueue *, ServerCompletionQueue *, void *)>
+          request_streaming_function,
+      std::function<grpc::Status(const PayloadConfig &, const RequestType *,
+                                 ResponseType *)> process_rpc)
+      : Server(config) {
     char *server_address = NULL;
 
     gpr_join_host_port(&server_address, config.host().c_str(), port());
@@ -67,7 +83,8 @@ class AsyncQpsServerTest : public Server {
                              Server::CreateServerCredentials(config));
     gpr_free(server_address);
 
-    builder.RegisterAsyncService(&async_service_);
+    register_service(&builder, &async_service_);
+
     for (int i = 0; i < config.async_server_threads(); i++) {
       srv_cqs_.emplace_back(builder.AddCompletionQueue());
     }
@@ -75,22 +92,29 @@ class AsyncQpsServerTest : public Server {
     server_ = builder.BuildAndStart();
 
     using namespace std::placeholders;
+
+    auto process_rpc_bound =
+        std::bind(process_rpc, config.payload_config(), _1, _2);
+
     for (int i = 0; i < 10000 / config.async_server_threads(); i++) {
       for (int j = 0; j < config.async_server_threads(); j++) {
-        auto request_unary = std::bind(
-            &BenchmarkService::AsyncService::RequestUnaryCall, &async_service_,
-            _1, _2, _3, srv_cqs_[j].get(), srv_cqs_[j].get(), _4);
-        auto request_streaming = std::bind(
-            &BenchmarkService::AsyncService::RequestStreamingCall,
-            &async_service_, _1, _2, srv_cqs_[j].get(), srv_cqs_[j].get(), _3);
-        contexts_.push_front(
-            new ServerRpcContextUnaryImpl<SimpleRequest, SimpleResponse>(
-                request_unary, ProcessRPC));
-        contexts_.push_front(
-            new ServerRpcContextStreamingImpl<SimpleRequest, SimpleResponse>(
-                request_streaming, ProcessRPC));
+        if (request_unary_function) {
+          auto request_unary =
+              std::bind(request_unary_function, &async_service_, _1, _2, _3,
+                        srv_cqs_[j].get(), srv_cqs_[j].get(), _4);
+          contexts_.push_front(
+              new ServerRpcContextUnaryImpl(request_unary, process_rpc_bound));
+        }
+        if (request_streaming_function) {
+          auto request_streaming =
+              std::bind(request_streaming_function, &async_service_, _1, _2,
+                        srv_cqs_[j].get(), srv_cqs_[j].get(), _3);
+          contexts_.push_front(new ServerRpcContextStreamingImpl(
+              request_streaming, process_rpc_bound));
+        }
       }
     }
+
     for (int i = 0; i < config.async_server_threads(); i++) {
       shutdown_state_.emplace_back(new PerThreadShutdownState());
     }
@@ -155,16 +179,15 @@ class AsyncQpsServerTest : public Server {
     return reinterpret_cast<ServerRpcContext *>(tag);
   }
 
-  template <class RequestType, class ResponseType>
   class ServerRpcContextUnaryImpl GRPC_FINAL : public ServerRpcContext {
    public:
     ServerRpcContextUnaryImpl(
-        std::function<void(ServerContext *, RequestType *,
+        std::function<void(ServerContextType *, RequestType *,
                            grpc::ServerAsyncResponseWriter<ResponseType> *,
                            void *)> request_method,
         std::function<grpc::Status(const RequestType *, ResponseType *)>
             invoke_method)
-        : srv_ctx_(new ServerContext),
+        : srv_ctx_(new ServerContextType),
           next_state_(&ServerRpcContextUnaryImpl::invoker),
           request_method_(request_method),
           invoke_method_(invoke_method),
@@ -177,7 +200,7 @@ class AsyncQpsServerTest : public Server {
       return (this->*next_state_)(ok);
     }
     void Reset() GRPC_OVERRIDE {
-      srv_ctx_.reset(new ServerContext);
+      srv_ctx_.reset(new ServerContextType);
       req_ = RequestType();
       response_writer_ =
           grpc::ServerAsyncResponseWriter<ResponseType>(srv_ctx_.get());
@@ -205,10 +228,10 @@ class AsyncQpsServerTest : public Server {
       response_writer_.Finish(response, status, AsyncQpsServerTest::tag(this));
       return true;
     }
-    std::unique_ptr<ServerContext> srv_ctx_;
+    std::unique_ptr<ServerContextType> srv_ctx_;
     RequestType req_;
     bool (ServerRpcContextUnaryImpl::*next_state_)(bool);
-    std::function<void(ServerContext *, RequestType *,
+    std::function<void(ServerContextType *, RequestType *,
                        grpc::ServerAsyncResponseWriter<ResponseType> *, void *)>
         request_method_;
     std::function<grpc::Status(const RequestType *, ResponseType *)>
@@ -216,16 +239,16 @@ class AsyncQpsServerTest : public Server {
     grpc::ServerAsyncResponseWriter<ResponseType> response_writer_;
   };
 
-  template <class RequestType, class ResponseType>
   class ServerRpcContextStreamingImpl GRPC_FINAL : public ServerRpcContext {
    public:
     ServerRpcContextStreamingImpl(
-        std::function<void(ServerContext *, grpc::ServerAsyncReaderWriter<
-                                                ResponseType, RequestType> *,
-                           void *)> request_method,
+        std::function<void(
+            ServerContextType *,
+            grpc::ServerAsyncReaderWriter<ResponseType, RequestType> *, void *)>
+            request_method,
         std::function<grpc::Status(const RequestType *, ResponseType *)>
             invoke_method)
-        : srv_ctx_(new ServerContext),
+        : srv_ctx_(new ServerContextType),
           next_state_(&ServerRpcContextStreamingImpl::request_done),
           request_method_(request_method),
           invoke_method_(invoke_method),
@@ -237,7 +260,7 @@ class AsyncQpsServerTest : public Server {
       return (this->*next_state_)(ok);
     }
     void Reset() GRPC_OVERRIDE {
-      srv_ctx_.reset(new ServerContext);
+      srv_ctx_.reset(new ServerContextType);
       req_ = RequestType();
       stream_ = grpc::ServerAsyncReaderWriter<ResponseType, RequestType>(
           srv_ctx_.get());
@@ -286,11 +309,11 @@ class AsyncQpsServerTest : public Server {
     }
     bool finish_done(bool ok) { return false; /* reset the context */ }
 
-    std::unique_ptr<ServerContext> srv_ctx_;
+    std::unique_ptr<ServerContextType> srv_ctx_;
     RequestType req_;
     bool (ServerRpcContextStreamingImpl::*next_state_)(bool);
     std::function<void(
-        ServerContext *,
+        ServerContextType *,
         grpc::ServerAsyncReaderWriter<ResponseType, RequestType> *, void *)>
         request_method_;
     std::function<grpc::Status(const RequestType *, ResponseType *)>
@@ -298,20 +321,10 @@ class AsyncQpsServerTest : public Server {
     grpc::ServerAsyncReaderWriter<ResponseType, RequestType> stream_;
   };
 
-  static Status ProcessRPC(const SimpleRequest *request,
-                           SimpleResponse *response) {
-    if (request->response_size() > 0) {
-      if (!SetPayload(request->response_type(), request->response_size(),
-                      response->mutable_payload())) {
-        return Status(grpc::StatusCode::INTERNAL, "Error creating payload.");
-      }
-    }
-    return Status::OK;
-  }
   std::vector<std::thread> threads_;
   std::unique_ptr<grpc::Server> server_;
   std::vector<std::unique_ptr<grpc::ServerCompletionQueue>> srv_cqs_;
-  BenchmarkService::AsyncService async_service_;
+  ServiceType async_service_;
   std::forward_list<ServerRpcContext *> contexts_;
 
   class PerThreadShutdownState {
@@ -335,9 +348,53 @@ class AsyncQpsServerTest : public Server {
   std::vector<std::unique_ptr<PerThreadShutdownState>> shutdown_state_;
 };
 
+static void RegisterBenchmarkService(ServerBuilder *builder,
+                                     BenchmarkService::AsyncService *service) {
+  builder->RegisterAsyncService(service);
+}
+static void RegisterGenericService(ServerBuilder *builder,
+                                   grpc::AsyncGenericService *service) {
+  builder->RegisterAsyncGenericService(service);
+}
+
+static Status ProcessSimpleRPC(const PayloadConfig &,
+                               const SimpleRequest *request,
+                               SimpleResponse *response) {
+  if (request->response_size() > 0) {
+    if (!Server::SetPayload(request->response_type(), request->response_size(),
+                            response->mutable_payload())) {
+      return Status(grpc::StatusCode::INTERNAL, "Error creating payload.");
+    }
+  }
+  return Status::OK;
+}
+
+static Status ProcessGenericRPC(const PayloadConfig &payload_config,
+                                const ByteBuffer *request,
+                                ByteBuffer *response) {
+  int resp_size = payload_config.bytebuf_params().resp_size();
+  std::unique_ptr<char> buf(new char[resp_size]);
+  gpr_slice s = gpr_slice_from_copied_buffer(buf.get(), resp_size);
+  Slice slice(s, Slice::STEAL_REF);
+  *response = ByteBuffer(&slice, 1);
+  return Status::OK;
+}
+
 std::unique_ptr<Server> CreateAsyncServer(const ServerConfig &config) {
-  return std::unique_ptr<Server>(new AsyncQpsServerTest(config));
+  return std::unique_ptr<Server>(new AsyncQpsServerTest<
+      SimpleRequest, SimpleResponse, BenchmarkService::AsyncService,
+      grpc::ServerContext>(
+      config, RegisterBenchmarkService,
+      &BenchmarkService::AsyncService::RequestUnaryCall,
+      &BenchmarkService::AsyncService::RequestStreamingCall, ProcessSimpleRPC));
+}
+std::unique_ptr<Server> CreateAsyncGenericServer(const ServerConfig &config) {
+  return std::unique_ptr<Server>(
+      new AsyncQpsServerTest<ByteBuffer, ByteBuffer, grpc::AsyncGenericService,
+                             grpc::GenericServerContext>(
+          config, RegisterGenericService, nullptr,
+          &grpc::AsyncGenericService::RequestCall, ProcessGenericRPC));
 }
 
 }  // namespace testing
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/test/cpp/util/cli_call.cc b/test/cpp/util/cli_call.cc
index 0de388d3caa7ea43a25d5ec03d8c92fb9e2878b5..28f5e47b46710fcf64aed93d870086b0aa487c26 100644
--- a/test/cpp/util/cli_call.cc
+++ b/test/cpp/util/cli_call.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
@@ -35,13 +35,13 @@
 
 #include <iostream>
 
-#include <grpc/grpc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/slice.h>
-#include <grpc++/support/byte_buffer.h>
 #include <grpc++/channel.h>
 #include <grpc++/client_context.h>
 #include <grpc++/generic/generic_stub.h>
+#include <grpc++/support/byte_buffer.h>
+#include <grpc/grpc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/slice.h>
 
 namespace grpc {
 namespace testing {
@@ -108,4 +108,4 @@ Status CliCall::Call(std::shared_ptr<grpc::Channel> channel,
 }
 
 }  // namespace testing
-}  // namespace grpc
+}  // namespace grpc
\ No newline at end of file
diff --git a/test/cpp/util/cli_call_test.cc b/test/cpp/util/cli_call_test.cc
index 94f54616a9c96d956bcff82b8c6c25a9f934a180..207371dce5e590b9084722fd1152821d2d5bfd35 100644
--- a/test/cpp/util/cli_call_test.cc
+++ b/test/cpp/util/cli_call_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
@@ -53,7 +53,7 @@ using grpc::testing::EchoResponse;
 namespace grpc {
 namespace testing {
 
-class TestServiceImpl : public ::grpc::testing::TestService::Service {
+class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
  public:
   Status Echo(ServerContext* context, const EchoRequest* request,
               EchoResponse* response) GRPC_OVERRIDE {
@@ -91,11 +91,11 @@ class CliCallTest : public ::testing::Test {
   void ResetStub() {
     channel_ =
         CreateChannel(server_address_.str(), InsecureChannelCredentials());
-    stub_ = grpc::testing::TestService::NewStub(channel_);
+    stub_ = grpc::testing::EchoTestService::NewStub(channel_);
   }
 
   std::shared_ptr<Channel> channel_;
-  std::unique_ptr<grpc::testing::TestService::Stub> stub_;
+  std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
   std::unique_ptr<Server> server_;
   std::ostringstream server_address_;
   TestServiceImpl service_;
@@ -115,7 +115,7 @@ TEST_F(CliCallTest, SimpleRpc) {
   EXPECT_EQ(response.message(), request.message());
   EXPECT_TRUE(s.ok());
 
-  const grpc::string kMethod("/grpc.testing.TestService/Echo");
+  const grpc::string kMethod("/grpc.testing.EchoTestService/Echo");
   grpc::string request_bin, response_bin, expected_response_bin;
   EXPECT_TRUE(request.SerializeToString(&request_bin));
   EXPECT_TRUE(response.SerializeToString(&expected_response_bin));
@@ -140,4 +140,4 @@ int main(int argc, char** argv) {
   grpc_test_init(argc, argv);
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
-}
+}
\ No newline at end of file
diff --git a/tools/distrib/check_copyright.py b/tools/distrib/check_copyright.py
index 5158c11417a66d02a2b5b649678859e65ed247ae..0c0669083a0af1075874a262892e83819027a5a4 100755
--- a/tools/distrib/check_copyright.py
+++ b/tools/distrib/check_copyright.py
@@ -54,6 +54,9 @@ argp.add_argument('-a', '--ancient',
                   default=0,
                   action='store_const',
                   const=1)
+argp.add_argument('-f', '--fix',
+                  default=False,
+                  action='store_true');
 args = argp.parse_args()
 
 # open the license text
@@ -90,7 +93,7 @@ KNOWN_BAD = set([
 ])
 
 
-RE_YEAR = r'Copyright (?:[0-9]+\-)?([0-9]+), Google Inc\.'
+RE_YEAR = r'Copyright (?P<first_year>[0-9]+\-)?(?P<last_year>[0-9]+), Google Inc\.'
 RE_LICENSE = dict(
     (k, r'\n'.join(
         LICENSE_PREFIX[k] +
@@ -101,8 +104,11 @@ RE_LICENSE = dict(
 
 def load(name):
   with open(name) as f:
-    return '\n'.join(line.rstrip() for line in f.read().splitlines())
+    return f.read()
 
+def save(name, text):
+  with open(name, 'w') as f:
+    f.write(text)
 
 assert(re.search(RE_LICENSE['LICENSE'], load('LICENSE')))
 assert(re.search(RE_LICENSE['Makefile'], load('Makefile')))
@@ -133,14 +139,25 @@ for filename in subprocess.check_output('git ls-tree -r --name-only -r HEAD',
   text = load(filename)
   m = re.search(re_license, text)
   if m:
+    gdict = m.groupdict()
     last_modified = int(subprocess.check_output('git log -1 --format="%ad" --date=short -- ' + filename, shell=True)[0:4])
-    latest_claimed = int(m.group(1))
+    latest_claimed = int(gdict['last_year'])
     if last_modified > latest_claimed:
       print '%s modified %d but copyright only extends to %d' % (filename, last_modified, latest_claimed)
       ok = False
+      if args.fix:
+        span_start, span_end = m.span(2)
+        if not gdict['first_year']:
+          # prepend the old year to the current one.
+          text = '{}-{}{}'.format(text[:span_end], last_modified, text[span_end:])
+        else:  # already a year range
+          # simply update the last year
+          text = '{}{}{}'.format(text[:span_start], last_modified, text[span_end:])
+        save(filename, text)
+        print 'Fixed!'
+        ok = True
   elif 'DO NOT EDIT' not in text and 'AssemblyInfo.cs' not in filename and filename != 'src/boringssl/err_data.c':
     log(1, 'copyright missing', filename)
     ok = False
 
 sys.exit(0 if ok else 1)
-
diff --git a/tools/distrib/clang_format_code.sh b/tools/distrib/clang_format_code.sh
index 612074acdf74baa62b4bd0b639ee21167ac8d4c4..6bfa278cae6ddd1e87f71d000dec0c21d10c0763 100755
--- a/tools/distrib/clang_format_code.sh
+++ b/tools/distrib/clang_format_code.sh
@@ -38,4 +38,3 @@ docker build -t grpc_clang_format tools/dockerfile/grpc_clang_format
 
 # run clang-format against the checked out codebase
 docker run -e TEST=$TEST --rm=true -v ${HOST_GIT_ROOT:-`pwd`}:/local-code -t grpc_clang_format /clang_format_all_the_things.sh
-
diff --git a/tools/distrib/python/submit.py b/tools/distrib/python/submit.py
index 08ace7c69015b814380aab553472907232bc454b..9b012be672024b2af153ac03741e31a7cd3bdfb5 100755
--- a/tools/distrib/python/submit.py
+++ b/tools/distrib/python/submit.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
@@ -55,6 +55,14 @@ parser.add_argument(
     help='Password to authenticate with the repository. Not needed if you have '
          'configured your .pypirc to include your password.'
 )
+parser.add_argument(
+    '--bdist', '-b', action='store_true',
+    help='Generate a binary distribution (wheel) for the current OS.'
+)
+parser.add_argument(
+    '--dist-args', type=str,
+    help='Additional arguments to pass to the *dist setup.py command.'
+)
 args = parser.parse_args()
 
 # Move to the root directory of Python GRPC.
@@ -73,7 +81,12 @@ cmd = ['python', 'setup.py', 'build_ext', '--inplace']
 subprocess.call(cmd, cwd=pkgdir, env=build_env)
 
 # Make the push.
-cmd = ['python', 'setup.py', 'sdist']
+if args.bdist:
+  cmd = ['python', 'setup.py', 'bdist_wheel']
+else:
+  cmd = ['python', 'setup.py', 'sdist']
+if args.dist_args:
+  cmd += args.dist_args.split()
 subprocess.call(cmd, cwd=pkgdir)
 
 cmd = ['twine', 'upload', '-r', args.repository]
diff --git a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
index ededc6e80926dd593d48b7fe0a44264d763d3ff1..87445c71ce7474ec798a7e407762fa646cca292c 100755
--- a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
+++ b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
@@ -65,4 +65,3 @@ else
     false
   fi
 fi
-
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index aef5bec86b078228da98116f0665c02a90dd4f20..2280fde425fb45f3adc226eca88622b4ea31050a 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -1014,6 +1014,7 @@ 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 \
 src/core/transport/chttp2/alpn.c \
diff --git a/tools/run_tests/build_ruby.sh b/tools/run_tests/build_ruby.sh
index 6d23c316c5ad1e8781d4685ff34a82d6005104a3..8acb40dc62a981bb4a68e4b393bfbdfc1f962bfc 100755
--- a/tools/run_tests/build_ruby.sh
+++ b/tools/run_tests/build_ruby.sh
@@ -34,7 +34,7 @@ set -ex
 export GRPC_CONFIG=${CONFIG:-opt}
 
 # change to grpc's ruby directory
-cd $(dirname $0)/../../src/ruby
+cd $(dirname $0)/../..
 
 rm -rf ./tmp
 rake compile:grpc
diff --git a/tools/run_tests/run_interop_tests.py b/tools/run_tests/run_interop_tests.py
index 40bbe3cc3ca0ada2659a126345d49c54fcd74e42..70f1b307ba17b29c9081f1fed426ee0c6e397c1a 100755
--- a/tools/run_tests/run_interop_tests.py
+++ b/tools/run_tests/run_interop_tests.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -549,7 +549,7 @@ def aggregate_http2_results(stdout):
   match = re.search(r'\{"cases[^\]]*\]\}', stdout)
   if not match:
     return None
-    
+
   results = json.loads(match.group(0))
   skipped = 0
   passed = 0
@@ -742,7 +742,7 @@ try:
       for test_case in _HTTP2_TEST_CASES:
         if server_name == "go":
           # TODO(carl-mastrangelo): Reenable after https://github.com/grpc/grpc-go/issues/434
-          continue 
+          continue
         test_job = cloud_to_cloud_jobspec(http2Interop,
                                           test_case,
                                           server_name,
@@ -771,7 +771,7 @@ try:
       job[0].http2results = aggregate_http2_results(job[0].message)
 
   report_utils.render_interop_html_report(
-      set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES, 
+      set([str(l) for l in languages]), servers, _TEST_CASES, _AUTH_TEST_CASES,
       _HTTP2_TEST_CASES, resultset, num_failures,
       args.cloud_to_prod_auth or args.cloud_to_prod, args.http2_interop)
 
@@ -785,4 +785,4 @@ finally:
 
   for image in docker_images.itervalues():
     print 'Removing docker image %s' % image
-    dockerjob.remove_image(image)
+    dockerjob.remove_image(image)
\ No newline at end of file
diff --git a/tools/run_tests/run_ruby.sh b/tools/run_tests/run_ruby.sh
index b82ce52af3821d3a11f5a5e6e97a12a4ef1a7ffc..73a84ac361f4e11c7a1cc19d2527fa813a2f5cc9 100755
--- a/tools/run_tests/run_ruby.sh
+++ b/tools/run_tests/run_ruby.sh
@@ -31,6 +31,6 @@
 set -ex
 
 # change to grpc repo root
-cd $(dirname $0)/../../src/ruby
+cd $(dirname $0)/../..
 
 rake
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 8d86fa3bf3479b4e1e20c4e346d8d97200e40717..3e42c59ed3edeac900f9df55b033e4a441ddd1bc 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1497,6 +1497,23 @@
       "test/cpp/end2end/end2end_test.cc"
     ]
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc++", 
+      "grpc++_test_util", 
+      "grpc_test_util", 
+      "qps"
+    ], 
+    "headers": [], 
+    "language": "c++", 
+    "name": "generic_async_streaming_ping_pong_test", 
+    "src": [
+      "test/cpp/qps/generic_async_streaming_ping_pong_test.cc"
+    ]
+  }, 
   {
     "deps": [
       "gpr", 
@@ -3212,6 +3229,7 @@
       "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", 
       "src/core/transport/byte_stream.c", 
       "src/core/transport/byte_stream.h", 
@@ -3683,6 +3701,7 @@
       "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", 
       "src/core/transport/byte_stream.c", 
       "src/core/transport/byte_stream.h", 
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index d4839e235f6233b3f5cf2db704ca1204b5715c57..2757ce445d7df4288657384fe60623163d5e4600 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -1823,6 +1823,23 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ], 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "generic_async_streaming_ping_pong_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 9d646153e28ea0047ff7c68ef70b6b65213123a9..1cdc201f6e3555ca781d146277c3fbc676447255 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -640,6 +640,8 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\version.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\byte_stream.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 055256a7e81cd505172227c4695849b6e314cf2e..f29f881595155696fbe87cddd74a5e33f925a590 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -352,6 +352,9 @@
     <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>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\version.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index b2965212bb48edb2b52614defb2c8f6b1a7e11ab..78ffe148e51fe4728fae0f2a35290a34b805e834 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -578,6 +578,8 @@
     </ClCompile>
     <ClCompile Include="$(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">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\transport\byte_stream.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index e30ca5f685d7df80f6ed6606cb1a7cd74dfcf09d..e068c3fe182ed55c4703f9a7d26ab0b5bca0c414 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -292,6 +292,9 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\server_create.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\surface\validate_metadata.c">
+      <Filter>src\core\surface</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\surface\version.c">
       <Filter>src\core\surface</Filter>
     </ClCompile>