diff --git a/BUILD b/BUILD
index 2110d02abe737e01ba8b9452b87ddef6eaa91cef..7273b17d739bc2a17854d786205ef135d1c02fc0 100644
--- a/BUILD
+++ b/BUILD
@@ -978,11 +978,15 @@ objc_library(
     "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_encoder.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/metadata.c",
     "src/core/transport/stream_op.c",
@@ -1071,6 +1075,8 @@ objc_library(
     "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_encoder.h",
     "src/core/transport/chttp2/stream_map.h",
diff --git a/Makefile b/Makefile
index 1d796b4198279e05f44b78153e937600825c8869..5904f77d113d70a0f85c83182e2a6e4827d53de1 100644
--- a/Makefile
+++ b/Makefile
@@ -331,6 +331,8 @@ HOST_LDLIBS = $(LDLIBS)
 # These are automatically computed variables.
 # There shouldn't be any need to change anything from now on.
 
+HAS_PKG_CONFIG = $(shell command -v pkg-config >/dev/null 2>&1 && echo true || echo false)
+
 ifeq ($(SYSTEM),MINGW32)
 SHARED_EXT = dll
 endif
@@ -355,6 +357,13 @@ ifeq ($(SYSTEM),Darwin)
 OPENSSL_REQUIRES_DL = true
 endif
 
+ifeq ($(HAS_PKG_CONFIG),true)
+OPENSSL_ALPN_CHECK_CMD = pkg-config --atleast-version=1.0.2 openssl
+ZLIB_CHECK_CMD = pkg-config --exists zlib
+PERFTOOLS_CHECK_CMD = pkg-config --exists profiler
+PROTOBUF_CHECK_CMD = pkg-config --atleast-version=3.0.0-alpha-3 protobuf
+else # HAS_PKG_CONFIG
+
 ifeq ($(SYSTEM),MINGW32)
 OPENSSL_LIBS = ssl32 eay32
 else
@@ -365,15 +374,18 @@ OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/ope
 ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
 PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
-PROTOC_CHECK_CMD = which protoc > /dev/null
-PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
-DTRACE_CHECK_CMD = which dtrace > /dev/null
-SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
 
 ifeq ($(OPENSSL_REQUIRES_DL),true)
 OPENSSL_ALPN_CHECK_CMD += -ldl
 endif
 
+endif # HAS_PKG_CONFIG
+
+PROTOC_CHECK_CMD = which protoc > /dev/null
+PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
+DTRACE_CHECK_CMD = which dtrace > /dev/null
+SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
+
 ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
 HAS_SYSTEM_PERFTOOLS = $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_PERFTOOLS),true)
@@ -442,6 +454,11 @@ LDFLAGS += -L$(LIBDIR)/$(CONFIG)/zlib
 else
 DEP_MISSING += zlib
 endif
+else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags zlib)
+LDFLAGS += $(shell pkg-config --libs-only-L zlib)
+endif
 endif
 
 ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),false)
@@ -458,13 +475,22 @@ else
 NO_SECURE = true
 endif
 else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags openssl)
+LDFLAGS += $(shell pkg-config --libs-only-L openssl)
+else
 LIBS_SECURE = $(OPENSSL_LIBS)
 ifeq ($(OPENSSL_REQUIRES_DL),true)
 LIBS_SECURE += dl
 endif
 endif
+endif
 
+ifeq ($(HAS_PKG_CONFIG),true)
+LDLIBS_SECURE += $(shell pkg-config --libs-only-l openssl)
+else
 LDLIBS_SECURE += $(addprefix -l, $(LIBS_SECURE))
+endif
 
 ifeq ($(HAS_SYSTEM_PROTOBUF),false)
 ifeq ($(HAS_EMBEDDED_PROTOBUF),true)
@@ -476,14 +502,23 @@ else
 NO_PROTOBUF = true
 endif
 else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags protobuf)
+LDFLAGS += $(shell pkg-config --libs-only-L protobuf)
+endif
 endif
 
 LIBS_PROTOBUF = protobuf
 LIBS_PROTOC = protoc protobuf
 
-LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
 HOST_LDLIBS_PROTOC += $(addprefix -l, $(LIBS_PROTOC))
 
+ifeq ($(HAS_PKG_CONFIG),true)
+LDLIBS_PROTOBUF += $(shell pkg-config --libs-only-l protobuf)
+else
+LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
+endif
+
 ifeq ($(MAKECMDGOALS),clean)
 NO_DEPS = true
 endif
diff --git a/templates/Makefile.template b/templates/Makefile.template
index ebe207f191882fe04f51ea9d45808191641203f4..5c1d90b9adae454ea8062bf33bbba6d20ba032c1 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -345,6 +345,8 @@ HOST_LDLIBS = $(LDLIBS)
 # These are automatically computed variables.
 # There shouldn't be any need to change anything from now on.
 
+HAS_PKG_CONFIG = $(shell command -v pkg-config >/dev/null 2>&1 && echo true || echo false)
+
 ifeq ($(SYSTEM),MINGW32)
 SHARED_EXT = dll
 endif
@@ -369,6 +371,13 @@ ifeq ($(SYSTEM),Darwin)
 OPENSSL_REQUIRES_DL = true
 endif
 
+ifeq ($(HAS_PKG_CONFIG),true)
+OPENSSL_ALPN_CHECK_CMD = pkg-config --atleast-version=1.0.2 openssl
+ZLIB_CHECK_CMD = pkg-config --exists zlib
+PERFTOOLS_CHECK_CMD = pkg-config --exists profiler
+PROTOBUF_CHECK_CMD = pkg-config --atleast-version=3.0.0-alpha-3 protobuf
+else # HAS_PKG_CONFIG
+
 ifeq ($(SYSTEM),MINGW32)
 OPENSSL_LIBS = ssl32 eay32
 else
@@ -379,15 +388,18 @@ OPENSSL_ALPN_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/ope
 ZLIB_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/zlib.c -lz $(LDFLAGS)
 PERFTOOLS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/perftools.c -lprofiler $(LDFLAGS)
 PROTOBUF_CHECK_CMD = $(CXX) $(CXXFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/protobuf.cc -lprotobuf $(LDFLAGS)
-PROTOC_CHECK_CMD = which protoc > /dev/null
-PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
-DTRACE_CHECK_CMD = which dtrace > /dev/null
-SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
 
 ifeq ($(OPENSSL_REQUIRES_DL),true)
 OPENSSL_ALPN_CHECK_CMD += -ldl
 endif
 
+endif # HAS_PKG_CONFIG
+
+PROTOC_CHECK_CMD = which protoc > /dev/null
+PROTOC_CHECK_VERSION_CMD = protoc --version | grep -q libprotoc.3
+DTRACE_CHECK_CMD = which dtrace > /dev/null
+SYSTEMTAP_HEADERS_CHECK_CMD = $(CC) $(CFLAGS) $(CPPFLAGS) -o $(TMPOUT) test/build/systemtap.c $(LDFLAGS)
+
 ifndef REQUIRE_CUSTOM_LIBRARIES_$(CONFIG)
 HAS_SYSTEM_PERFTOOLS = $(shell $(PERFTOOLS_CHECK_CMD) 2> /dev/null && echo true || echo false)
 ifeq ($(HAS_SYSTEM_PERFTOOLS),true)
@@ -456,6 +468,11 @@ LDFLAGS += -L$(LIBDIR)/$(CONFIG)/zlib
 else
 DEP_MISSING += zlib
 endif
+else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags zlib)
+LDFLAGS += $(shell pkg-config --libs-only-L zlib)
+endif
 endif
 
 ifeq ($(HAS_SYSTEM_OPENSSL_ALPN),false)
@@ -472,13 +489,22 @@ else
 NO_SECURE = true
 endif
 else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags openssl)
+LDFLAGS += $(shell pkg-config --libs-only-L openssl)
+else
 LIBS_SECURE = $(OPENSSL_LIBS)
 ifeq ($(OPENSSL_REQUIRES_DL),true)
 LIBS_SECURE += dl
 endif
 endif
+endif
 
+ifeq ($(HAS_PKG_CONFIG),true)
+LDLIBS_SECURE += $(shell pkg-config --libs-only-l openssl)
+else
 LDLIBS_SECURE += $(addprefix -l, $(LIBS_SECURE))
+endif
 
 ifeq ($(HAS_SYSTEM_PROTOBUF),false)
 ifeq ($(HAS_EMBEDDED_PROTOBUF),true)
@@ -490,14 +516,23 @@ else
 NO_PROTOBUF = true
 endif
 else
+ifeq ($(HAS_PKG_CONFIG),true)
+CPPFLAGS += $(shell pkg-config --cflags protobuf)
+LDFLAGS += $(shell pkg-config --libs-only-L protobuf)
+endif
 endif
 
 LIBS_PROTOBUF = protobuf
 LIBS_PROTOC = protoc protobuf
 
-LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
 HOST_LDLIBS_PROTOC += $(addprefix -l, $(LIBS_PROTOC))
 
+ifeq ($(HAS_PKG_CONFIG),true)
+LDLIBS_PROTOBUF += $(shell pkg-config --libs-only-l protobuf)
+else
+LDLIBS_PROTOBUF += $(addprefix -l, $(LIBS_PROTOBUF))
+endif
+
 ifeq ($(MAKECMDGOALS),clean)
 NO_DEPS = true
 endif
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 5c74bf1eea3dc5f3353a7687db4d2ba15a93b75d..eb2514fa46dfbe9d6ca3910e2c04605e4b646894 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -8717,6 +8717,8 @@
       "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_encoder.h", 
       "src/core/transport/chttp2/stream_map.h", 
@@ -8933,16 +8935,22 @@
       "src/core/transport/chttp2/http2_errors.h", 
       "src/core/transport/chttp2/huffsyms.c", 
       "src/core/transport/chttp2/huffsyms.h", 
+      "src/core/transport/chttp2/incoming_metadata.c", 
+      "src/core/transport/chttp2/incoming_metadata.h", 
+      "src/core/transport/chttp2/internal.h", 
+      "src/core/transport/chttp2/parsing.c", 
       "src/core/transport/chttp2/status_conversion.c", 
       "src/core/transport/chttp2/status_conversion.h", 
       "src/core/transport/chttp2/stream_encoder.c", 
       "src/core/transport/chttp2/stream_encoder.h", 
+      "src/core/transport/chttp2/stream_lists.c", 
       "src/core/transport/chttp2/stream_map.c", 
       "src/core/transport/chttp2/stream_map.h", 
       "src/core/transport/chttp2/timeout_encoding.c", 
       "src/core/transport/chttp2/timeout_encoding.h", 
       "src/core/transport/chttp2/varint.c", 
       "src/core/transport/chttp2/varint.h", 
+      "src/core/transport/chttp2/writing.c", 
       "src/core/transport/chttp2_transport.c", 
       "src/core/transport/chttp2_transport.h", 
       "src/core/transport/metadata.c", 
@@ -9116,6 +9124,8 @@
       "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_encoder.h", 
       "src/core/transport/chttp2/stream_map.h", 
@@ -9296,16 +9306,22 @@
       "src/core/transport/chttp2/http2_errors.h", 
       "src/core/transport/chttp2/huffsyms.c", 
       "src/core/transport/chttp2/huffsyms.h", 
+      "src/core/transport/chttp2/incoming_metadata.c", 
+      "src/core/transport/chttp2/incoming_metadata.h", 
+      "src/core/transport/chttp2/internal.h", 
+      "src/core/transport/chttp2/parsing.c", 
       "src/core/transport/chttp2/status_conversion.c", 
       "src/core/transport/chttp2/status_conversion.h", 
       "src/core/transport/chttp2/stream_encoder.c", 
       "src/core/transport/chttp2/stream_encoder.h", 
+      "src/core/transport/chttp2/stream_lists.c", 
       "src/core/transport/chttp2/stream_map.c", 
       "src/core/transport/chttp2/stream_map.h", 
       "src/core/transport/chttp2/timeout_encoding.c", 
       "src/core/transport/chttp2/timeout_encoding.h", 
       "src/core/transport/chttp2/varint.c", 
       "src/core/transport/chttp2/varint.h", 
+      "src/core/transport/chttp2/writing.c", 
       "src/core/transport/chttp2_transport.c", 
       "src/core/transport/chttp2_transport.h", 
       "src/core/transport/metadata.c",