Merge github.com:grpc/grpc into latent-see

binding.gyp

@@ -0,0 +1,95 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+{
+  "variables" : {
+    'config': '<!(echo $CONFIG)'
+  },
+  "targets" : [
+    {
+      'include_dirs': [
+        "<!(node -e \"require('nan')\")"
+      ],
+      'cflags': [
+        '-std=c++0x',
+        '-Wall',
+        '-pthread',
+        '-g',
+        '-zdefs',
+        '-Werror',
+        '-Wno-error=deprecated-declarations'
+      ],
+      'ldflags': [
+        '-g'
+      ],
+      "conditions": [
+        ['OS != "win"', {
+          'conditions': [
+            ['config=="gcov"', {
+              'cflags': [
+                '-ftest-coverage',
+                '-fprofile-arcs',
+                '-O0'
+              ],
+              'ldflags': [
+                '-ftest-coverage',
+                '-fprofile-arcs'
+              ]
+            }
+           ]
+          ]
+        }],
+        ['OS == "mac"', {
+          'xcode_settings': {
+            'MACOSX_DEPLOYMENT_TARGET': '10.9',
+            'OTHER_CFLAGS': [
+              '-std=c++11',
+              '-stdlib=libc++'
+            ]
+          }
+        }]
+      ],
+      "target_name": "grpc_node",
+      "sources": [
+        "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"
+      ],
+      "dependencies": [
+        "grpc.gyp:grpc"
+      ]
+    }
+  ]
+}

examples/node/greeter_client.js

@@ -33,7 +33,7 @@
 
 var PROTO_PATH = __dirname + '/helloworld.proto';
 
-var grpc = require('grpc');
+var grpc = require('../../');
 var hello_proto = grpc.load(PROTO_PATH).helloworld;
 
 function main() {

examples/node/greeter_server.js

@@ -33,7 +33,7 @@
 
 var PROTO_PATH = __dirname + '/helloworld.proto';
 
-var grpc = require('grpc');
+var grpc = require('../../');
 var hello_proto = grpc.load(PROTO_PATH).helloworld;
 
 /**

examples/node/package.json

@@ -1,10 +0,0 @@
-{
-  "name": "grpc-demo",
-  "version": "0.11.0",
-  "dependencies": {
-    "async": "^0.9.0",
-    "grpc": "~0.11.0",
-    "minimist": "^1.1.0",
-    "underscore": "^1.8.2"
-  }
-}

examples/node/route_guide/route_guide_client.js

@@ -31,8 +31,8 @@ var async = require('async');
 var fs = require('fs');
 var parseArgs = require('minimist');
 var path = require('path');
-var _ = require('underscore');
-var grpc = require('grpc');
+var _ = require('lodash');
+var grpc = require('../../../');
 var routeguide = grpc.load(__dirname + '/route_guide.proto').routeguide;
 var client = new routeguide.RouteGuide('localhost:50051',
                                        grpc.Credentials.createInsecure());

examples/node/route_guide/route_guide_server.js

@@ -30,8 +30,8 @@
 var fs = require('fs');
 var parseArgs = require('minimist');
 var path = require('path');
-var _ = require('underscore');
-var grpc = require('grpc');
+var _ = require('lodash');
+var grpc = require('../../../');
 var routeguide = grpc.load(__dirname + '/route_guide.proto').routeguide;
 
 var COORD_FACTOR = 1e7;

examples/php/README.md

@@ -8,7 +8,7 @@ This requires PHP 5.5 or greater.
 
 INSTALL
 -------
- - On Mac OS X, install [homebrew][]. On Linux, install [linuxbrew][]. Run the following command to install gRPC.
+ - On Mac OS X, install [homebrew][]. Run the following command to install gRPC.
 
    ```sh
    $ curl -fsSL https://goo.gl/getgrpc | bash -s php
@@ -59,7 +59,6 @@ TUTORIAL
 You can find a more detailed tutorial in [gRPC Basics: PHP][]
 
 [homebrew]:http://brew.sh
-[linuxbrew]:https://github.com/Homebrew/linuxbrew#installation
 [gRPC install script]:https://raw.githubusercontent.com/grpc/homebrew-grpc/master/scripts/install
 [Node]:https://github.com/grpc/grpc/tree/master/examples/node
 [gRPC Basics: PHP]:http://www.grpc.io/docs/tutorials/basic/php.html

examples/python/README.md

@@ -0,0 +1,55 @@
+gRPC in 3 minutes (Python)
+========================
+
+Background
+-------------
+For this sample, we've already generated the server and client stubs from
+[helloworld.proto][] and we'll be using a specific reference platform.
+
+Prerequisites
+-------------
+
+- Debian 8.2 "Jessie" platform with `root` access
+- `git`
+- `python2.7`
+- `pip`
+- Python development headers
+
+Set-up
+-------
+  ```sh
+  $ # install the gRPC Core:
+  $ sudo apt-get install libgrpc-dev
+  $ # install gRPC Python:
+  $ sudo pip install -U grpcio==0.11.0b1
+  $ # Since this "hello, world" example uses protocol buffers:
+  $ sudo pip install -U protobuf==3.0.0a3
+  $ # Clone the repository to get the example code:
+  $ git clone https://github.com/grpc/grpc
+  $ # Navigate to the "hello, world" Python example:
+  $ cd grpc/examples/python/helloworld
+  ```
+
+Try it!
+-------
+
+- Run the server
+
+  ```sh
+  $ python2.7 greeter_server.py &
+  ```
+
+- Run the client
+
+  ```sh
+  $ python2.7 greeter_client.py
+  ```
+
+Tutorial
+--------
+
+You can find a more detailed tutorial in [gRPC Basics: Python][]
+
+[helloworld.proto]:../protos/helloworld.proto
+[Install gRPC Python]:../../src/python#installation
+[gRPC Basics: Python]:http://www.grpc.io/docs/tutorials/basic/python.html

examples/python/helloworld/helloworld_pb2.py

@@ -0,0 +1,202 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: helloworld.proto
+
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='helloworld.proto',
+  package='helloworld',
+  syntax='proto3',
+  serialized_pb=b'\n\x10helloworld.proto\x12\nhelloworld\"\x1c\n\x0cHelloRequest\x12\x0c\n\x04name\x18\x01 \x01(\t\"\x1d\n\nHelloReply\x12\x0f\n\x07message\x18\x01 \x01(\t2I\n\x07Greeter\x12>\n\x08SayHello\x12\x18.helloworld.HelloRequest\x1a\x16.helloworld.HelloReply\"\x00\x42\x18\n\x10io.grpc.examples\xa2\x02\x03HLWb\x06proto3'
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+
+_HELLOREQUEST = _descriptor.Descriptor(
+  name='HelloRequest',
+  full_name='helloworld.HelloRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='helloworld.HelloRequest.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=32,
+  serialized_end=60,
+)
+
+
+_HELLOREPLY = _descriptor.Descriptor(
+  name='HelloReply',
+  full_name='helloworld.HelloReply',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message', full_name='helloworld.HelloReply.message', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=62,
+  serialized_end=91,
+)
+
+DESCRIPTOR.message_types_by_name['HelloRequest'] = _HELLOREQUEST
+DESCRIPTOR.message_types_by_name['HelloReply'] = _HELLOREPLY
+
+HelloRequest = _reflection.GeneratedProtocolMessageType('HelloRequest', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREQUEST,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloRequest)
+  ))
+_sym_db.RegisterMessage(HelloRequest)
+
+HelloReply = _reflection.GeneratedProtocolMessageType('HelloReply', (_message.Message,), dict(
+  DESCRIPTOR = _HELLOREPLY,
+  __module__ = 'helloworld_pb2'
+  # @@protoc_insertion_point(class_scope:helloworld.HelloReply)
+  ))
+_sym_db.RegisterMessage(HelloReply)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), b'\n\020io.grpc.examples\242\002\003HLW')
+import abc
+from grpc.beta import implementations as beta_implementations
+from grpc.early_adopter import implementations as early_adopter_implementations
+from grpc.framework.alpha import utilities as alpha_utilities
+from grpc.framework.common import cardinality
+from grpc.framework.interfaces.face import utilities as face_utilities
+class EarlyAdopterGreeterServicer(object):
+  """<fill me in later!>"""
+  __metaclass__ = abc.ABCMeta
+  @abc.abstractmethod
+  def SayHello(self, request, context):
+    raise NotImplementedError()
+class EarlyAdopterGreeterServer(object):
+  """<fill me in later!>"""
+  __metaclass__ = abc.ABCMeta
+  @abc.abstractmethod
+  def start(self):
+    raise NotImplementedError()
+  @abc.abstractmethod
+  def stop(self):
+    raise NotImplementedError()
+class EarlyAdopterGreeterStub(object):
+  """<fill me in later!>"""
+  __metaclass__ = abc.ABCMeta
+  @abc.abstractmethod
+  def SayHello(self, request):
+    raise NotImplementedError()
+  SayHello.async = None
+def early_adopter_create_Greeter_server(servicer, port, private_key=None, certificate_chain=None):
+  import helloworld_pb2
+  import helloworld_pb2
+  method_service_descriptions = {
+    "SayHello": alpha_utilities.unary_unary_service_description(
+      servicer.SayHello,
+      helloworld_pb2.HelloRequest.FromString,
+      helloworld_pb2.HelloReply.SerializeToString,
+    ),
+  }
+  return early_adopter_implementations.server("helloworld.Greeter", method_service_descriptions, port, private_key=private_key, certificate_chain=certificate_chain)
+def early_adopter_create_Greeter_stub(host, port, metadata_transformer=None, secure=False, root_certificates=None, private_key=None, certificate_chain=None, server_host_override=None):
+  import helloworld_pb2
+  import helloworld_pb2
+  method_invocation_descriptions = {
+    "SayHello": alpha_utilities.unary_unary_invocation_description(
+      helloworld_pb2.HelloRequest.SerializeToString,
+      helloworld_pb2.HelloReply.FromString,
+    ),
+  }
+  return early_adopter_implementations.stub("helloworld.Greeter", method_invocation_descriptions, host, port, metadata_transformer=metadata_transformer, secure=secure, root_certificates=root_certificates, private_key=private_key, certificate_chain=certificate_chain, server_host_override=server_host_override)
+
+class BetaGreeterServicer(object):
+  """<fill me in later!>"""
+  __metaclass__ = abc.ABCMeta
+  @abc.abstractmethod
+  def SayHello(self, request, context):
+    raise NotImplementedError()
+
+class BetaGreeterStub(object):
+  """The interface to which stubs will conform."""
+  __metaclass__ = abc.ABCMeta
+  @abc.abstractmethod
+  def SayHello(self, request, timeout):
+    raise NotImplementedError()
+  SayHello.future = None
+
+def beta_create_Greeter_server(servicer, pool=None, pool_size=None, default_timeout=None, maximum_timeout=None):
+  import helloworld_pb2
+  import helloworld_pb2
+  request_deserializers = {
+    ('helloworld.Greeter', 'SayHello'): helloworld_pb2.HelloRequest.FromString,
+  }
+  response_serializers = {
+    ('helloworld.Greeter', 'SayHello'): helloworld_pb2.HelloReply.SerializeToString,
+  }
+  method_implementations = {
+    ('helloworld.Greeter', 'SayHello'): face_utilities.unary_unary_inline(servicer.SayHello),
+  }
+  server_options = beta_implementations.server_options(request_deserializers=request_deserializers, response_serializers=response_serializers, thread_pool=pool, thread_pool_size=pool_size, default_timeout=default_timeout, maximum_timeout=maximum_timeout)
+  return beta_implementations.server(method_implementations, options=server_options)
+
+def beta_create_Greeter_stub(channel, host=None, metadata_transformer=None, pool=None, pool_size=None):
+  import helloworld_pb2
+  import helloworld_pb2
+  request_serializers = {
+    ('helloworld.Greeter', 'SayHello'): helloworld_pb2.HelloRequest.SerializeToString,
+  }
+  response_deserializers = {
+    ('helloworld.Greeter', 'SayHello'): helloworld_pb2.HelloReply.FromString,
+  }
+  cardinalities = {
+    'SayHello': cardinality.Cardinality.UNARY_UNARY,
+  }
+  stub_options = beta_implementations.stub_options(host=host, metadata_transformer=metadata_transformer, request_serializers=request_serializers, response_deserializers=response_deserializers, thread_pool=pool, thread_pool_size=pool_size)
+  return beta_implementations.dynamic_stub(channel, 'helloworld.Greeter', cardinalities, options=stub_options)
+# @@protoc_insertion_point(module_scope)

package.json

@@ -16,14 +16,13 @@
     }
   ],
   "directories": {
-    "lib": "src",
-    "example": "examples"
+    "lib": "src/node/src"
   },
   "scripts": {
-    "lint": "node ./node_modules/jshint/bin/jshint src test examples interop index.js",
-    "test": "./node_modules/.bin/mocha && npm run-script lint",
-    "gen_docs": "./node_modules/.bin/jsdoc -c jsdoc_conf.json",
-    "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha"
+    "lint": "node ./node_modules/jshint/bin/jshint src/node/src src/node/test src/node/examples 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",
@@ -39,26 +38,24 @@
     "jshint": "^2.5.0",
     "minimist": "^1.1.0",
     "mocha": "~1.21.0",
-    "mustache": "^2.0.0",
-    "strftime": "^0.8.2"
+    "mustache": "^2.0.0"
   },
   "engines": {
     "node": ">=0.10.13"
   },
   "files": [
     "LICENSE",
-    "README.md",
-    "index.js",
-    "binding.gyp",
-    "bin",
-    "cli",
-    "examples",
-    "ext",
-    "health_check",
-    "interop",
-    "src",
-    "test"
+    "src/node/README.md",
+    "src/node/index.js",
+    "src/node/ext",
+    "src/node/health_check",
+    "src/node/src",
+    "src/core",
+    "test/proto",
+    "include",
+    "grpc.gyp",
+    "binding.gyp"
   ],
-  "main": "index.js",
+  "main": "src/node/index.js",
   "license": "BSD-3-Clause"
 }

src/core/channel/client_channel.c

@@ -51,7 +51,7 @@
 
 typedef struct call_data call_data;
 
-typedef struct {
+typedef struct client_channel_channel_data {
   /** metadata context for this channel */
   grpc_mdctx *mdctx;
   /** resolver for this channel */

src/core/client_config/lb_policies/pick_first.c

@@ -101,6 +101,9 @@ void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   for (i = 0; i < p->num_subchannels; i++) {
     GRPC_SUBCHANNEL_UNREF(exec_ctx, p->subchannels[i], "pick_first");
   }
+  if (p->selected) {
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, p->selected, "picked_first");
+  }
   grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
   gpr_free(p->subchannels);
   gpr_mu_destroy(&p->mu);
@@ -172,6 +175,35 @@ void pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   }
 }
 
+static void destroy_subchannels(grpc_exec_ctx *exec_ctx, void *arg, 
+                                int iomgr_success) {
+  pick_first_lb_policy *p = arg;
+  size_t i;
+  grpc_transport_op op;
+  size_t num_subchannels = p->num_subchannels;
+  grpc_subchannel **subchannels;
+  grpc_subchannel *exclude_subchannel;
+
+  gpr_mu_lock(&p->mu);
+  subchannels = p->subchannels;
+  p->num_subchannels = 0;
+  p->subchannels = NULL;
+  exclude_subchannel = p->selected;
+  gpr_mu_unlock(&p->mu);
+  GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "destroy_subchannels");
+
+  for (i = 0; i < num_subchannels; i++) {
+    if (subchannels[i] != exclude_subchannel) {
+      memset(&op, 0, sizeof(op));
+      op.disconnect = 1;
+      grpc_subchannel_process_transport_op(exec_ctx, subchannels[i], &op);
+    }
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, subchannels[i], "pick_first");
+  }
+
+  gpr_free(subchannels);
+}
+
 static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     int iomgr_success) {
   pick_first_lb_policy *p = arg;
@@ -200,6 +232,11 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_READY, "connecting_ready");
         p->selected = p->subchannels[p->checking_subchannel];
+        GRPC_SUBCHANNEL_REF(p->selected, "picked_first");
+        /* drop the pick list: we are connected now */
+        GRPC_LB_POLICY_REF(&p->base, "destroy_subchannels");
+        grpc_exec_ctx_enqueue(exec_ctx, grpc_closure_create(destroy_subchannels, p), 1);
+        /* update any calls that were waiting for a pick */
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
           *pp->target = p->selected;
@@ -279,10 +316,15 @@ static void pf_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   size_t i;
   size_t n;
   grpc_subchannel **subchannels;
+  grpc_subchannel *selected;
 
   gpr_mu_lock(&p->mu);
   n = p->num_subchannels;
   subchannels = gpr_malloc(n * sizeof(*subchannels));
+  selected = p->selected;
+  if (selected) {
+    GRPC_SUBCHANNEL_REF(selected, "pf_broadcast_to_selected");
+  }
   for (i = 0; i < n; i++) {
     subchannels[i] = p->subchannels[i];
     GRPC_SUBCHANNEL_REF(subchannels[i], "pf_broadcast");
@@ -290,9 +332,14 @@ static void pf_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   gpr_mu_unlock(&p->mu);
 
   for (i = 0; i < n; i++) {
+    if (selected == subchannels[i]) continue;
     grpc_subchannel_process_transport_op(exec_ctx, subchannels[i], op);
     GRPC_SUBCHANNEL_UNREF(exec_ctx, subchannels[i], "pf_broadcast");
   }
+  if (p->selected) {
+    grpc_subchannel_process_transport_op(exec_ctx, selected, op);
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, selected, "pf_broadcast_to_selected");
+  }
   gpr_free(subchannels);
 }
 

src/core/compression/algorithm.c

@@ -101,6 +101,7 @@ grpc_compression_algorithm grpc_compression_algorithm_for_level(
     default:
       /* we shouldn't be making it here */
       abort();
+      return GRPC_COMPRESS_NONE;
   }
 }
 
@@ -116,6 +117,7 @@ grpc_compression_level grpc_compression_level_for_algorithm(
     }
   }
   abort();
+  return GRPC_COMPRESS_LEVEL_NONE;
 }
 
 void grpc_compression_options_init(grpc_compression_options *opts) {

src/core/iomgr/closure.c

@@ -33,6 +33,8 @@
 
 #include "src/core/iomgr/closure.h"
 
+#include <grpc/support/alloc.h>
+
 void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
                        void *cb_arg) {
   closure->cb = cb;
@@ -69,3 +71,25 @@ void grpc_closure_list_move(grpc_closure_list *src, grpc_closure_list *dst) {
   }
   src->head = src->tail = NULL;
 }
+
+typedef struct {
+  grpc_iomgr_cb_func cb;
+  void *cb_arg;
+  grpc_closure wrapper;
+} wrapped_closure;
+
+static void closure_wrapper(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+  wrapped_closure *wc = arg;
+  grpc_iomgr_cb_func cb = wc->cb;
+  void *cb_arg = wc->cb_arg;
+  gpr_free(wc);
+  cb(exec_ctx, cb_arg, success);
+}
+
+grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg) {
+  wrapped_closure *wc = gpr_malloc(sizeof(*wc));
+  wc->cb = cb;
+  wc->cb_arg = cb_arg;
+  grpc_closure_init(&wc->wrapper, closure_wrapper, wc);
+  return &wc->wrapper;
+}

src/core/iomgr/closure.h

@@ -77,6 +77,9 @@ struct grpc_closure {
 void grpc_closure_init(grpc_closure *closure, grpc_iomgr_cb_func cb,
                        void *cb_arg);
 
+/* Create a heap allocated closure: try to avoid except for very rare events */
+grpc_closure *grpc_closure_create(grpc_iomgr_cb_func cb, void *cb_arg);
+
 #define GRPC_CLOSURE_LIST_INIT \
   { NULL, NULL }
 

src/core/iomgr/fd_posix.c

@@ -47,10 +47,8 @@
 
 #include "src/core/profiling/timers.h"
 
-enum descriptor_state {
-  NOT_READY = 0,
-  READY = 1
-}; /* or a pointer to a closure to call */
+#define CLOSURE_NOT_READY ((grpc_closure *)0)
+#define CLOSURE_READY ((grpc_closure *)1)
 
 /* We need to keep a freelist not because of any concerns of malloc performance
  * but instead so that implementations with multiple threads in (for example)
@@ -90,14 +88,13 @@ static grpc_fd *alloc_fd(int fd) {
   gpr_mu_unlock(&fd_freelist_mu);
   if (r == NULL) {
     r = gpr_malloc(sizeof(grpc_fd));
-    gpr_mu_init(&r->set_state_mu);
-    gpr_mu_init(&r->watcher_mu);
+    gpr_mu_init(&r->mu);
   }
 
   gpr_atm_rel_store(&r->refst, 1);
-  gpr_atm_rel_store(&r->readst, NOT_READY);
-  gpr_atm_rel_store(&r->writest, NOT_READY);
-  gpr_atm_rel_store(&r->shutdown, 0);
+  r->shutdown = 0;
+  r->read_closure = CLOSURE_NOT_READY;
+  r->write_closure = CLOSURE_NOT_READY;
   r->fd = fd;
   r->inactive_watcher_root.next = r->inactive_watcher_root.prev =
       &r->inactive_watcher_root;
@@ -109,8 +106,7 @@ static grpc_fd *alloc_fd(int fd) {
 }
 
 static void destroy(grpc_fd *fd) {
-  gpr_mu_destroy(&fd->set_state_mu);
-  gpr_mu_destroy(&fd->watcher_mu);
+  gpr_mu_destroy(&fd->mu);
   gpr_free(fd);
 }
 
@@ -175,39 +171,35 @@ int grpc_fd_is_orphaned(grpc_fd *fd) {
   return (gpr_atm_acq_load(&fd->refst) & 1) == 0;
 }
 
-static void pollset_kick_locked(grpc_pollset *pollset) {
-  gpr_mu_lock(GRPC_POLLSET_MU(pollset));
-  grpc_pollset_kick(pollset, NULL);
-  gpr_mu_unlock(GRPC_POLLSET_MU(pollset));
+static void pollset_kick_locked(grpc_fd_watcher *watcher) {
+  gpr_mu_lock(GRPC_POLLSET_MU(watcher->pollset));
+  GPR_ASSERT(watcher->worker);
+  grpc_pollset_kick_ext(watcher->pollset, watcher->worker,
+                        GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP);
+  gpr_mu_unlock(GRPC_POLLSET_MU(watcher->pollset));
 }
 
 static void maybe_wake_one_watcher_locked(grpc_fd *fd) {
   if (fd->inactive_watcher_root.next != &fd->inactive_watcher_root) {
-    pollset_kick_locked(fd->inactive_watcher_root.next->pollset);
+    pollset_kick_locked(fd->inactive_watcher_root.next);
   } else if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher->pollset);
+    pollset_kick_locked(fd->read_watcher);
   } else if (fd->write_watcher) {
-    pollset_kick_locked(fd->write_watcher->pollset);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
-static void maybe_wake_one_watcher(grpc_fd *fd) {
-  gpr_mu_lock(&fd->watcher_mu);
-  maybe_wake_one_watcher_locked(fd);
-  gpr_mu_unlock(&fd->watcher_mu);
-}
-
 static void wake_all_watchers_locked(grpc_fd *fd) {
   grpc_fd_watcher *watcher;
   for (watcher = fd->inactive_watcher_root.next;
        watcher != &fd->inactive_watcher_root; watcher = watcher->next) {
-    pollset_kick_locked(watcher->pollset);
+    pollset_kick_locked(watcher);
   }
   if (fd->read_watcher) {
-    pollset_kick_locked(fd->read_watcher->pollset);
+    pollset_kick_locked(fd->read_watcher);
   }
   if (fd->write_watcher && fd->write_watcher != fd->read_watcher) {
-    pollset_kick_locked(fd->write_watcher->pollset);
+    pollset_kick_locked(fd->write_watcher);
   }
 }
 
@@ -220,7 +212,7 @@ void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
                     const char *reason) {
   fd->on_done_closure = on_done;
   shutdown(fd->fd, SHUT_RDWR);
-  gpr_mu_lock(&fd->watcher_mu);
+  gpr_mu_lock(&fd->mu);
   REF_BY(fd, 1, reason); /* remove active status, but keep referenced */
   if (!has_watchers(fd)) {
     fd->closed = 1;
@@ -229,7 +221,7 @@ void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
   } else {
     wake_all_watchers_locked(fd);
   }
-  gpr_mu_unlock(&fd->watcher_mu);
+  gpr_mu_unlock(&fd->mu);
   UNREF_BY(fd, 2, reason); /* drop the reference */
 }
 
@@ -249,136 +241,121 @@ void grpc_fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
 void grpc_fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
 #endif
 
-static void notify_on(grpc_exec_ctx *exec_ctx, grpc_fd *fd, gpr_atm *st,
-                      grpc_closure *closure) {
-  switch (gpr_atm_acq_load(st)) {
-    case NOT_READY:
-      /* There is no race if the descriptor is already ready, so we skip
-         the interlocked op in that case.  As long as the app doesn't
-         try to set the same upcall twice (which it shouldn't) then
-         oldval should never be anything other than READY or NOT_READY.  We
-         don't
-         check for user error on the fast path. */
-      if (gpr_atm_rel_cas(st, NOT_READY, (gpr_intptr)closure)) {
-        /* swap was successful -- the closure will run after the next
-           set_ready call.  NOTE: we don't have an ABA problem here,
-           since we should never have concurrent calls to the same
-           notify_on function. */
-        maybe_wake_one_watcher(fd);
-        return;
-      }
-    /* swap was unsuccessful due to an intervening set_ready call.
-       Fall through to the READY code below */
-    case READY:
-      GPR_ASSERT(gpr_atm_no_barrier_load(st) == READY);
-      gpr_atm_rel_store(st, NOT_READY);
-      grpc_exec_ctx_enqueue(exec_ctx, closure,
-                            !gpr_atm_acq_load(&fd->shutdown));
-      return;
-    default: /* WAITING */
-      /* upcallptr was set to a different closure.  This is an error! */
-      gpr_log(GPR_ERROR,
-              "User called a notify_on function with a previous callback still "
-              "pending");
-      abort();
+static void notify_on_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                             grpc_closure **st, grpc_closure *closure) {
+  if (*st == CLOSURE_NOT_READY) {
+    /* not ready ==> switch to a waiting state by setting the closure */
+    *st = closure;
+  } else if (*st == CLOSURE_READY) {
+    /* already ready ==> queue the closure to run immediately */
+    *st = CLOSURE_NOT_READY;
+    grpc_exec_ctx_enqueue(exec_ctx, closure, !fd->shutdown);
+    maybe_wake_one_watcher_locked(fd);
+  } else {
+    /* upcallptr was set to a different closure.  This is an error! */
+    gpr_log(GPR_ERROR,
+            "User called a notify_on function with a previous callback still "
+            "pending");
+    abort();
   }
-  gpr_log(GPR_ERROR, "Corrupt memory in &st->state");
-  abort();
 }
 
-static void set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
-                             gpr_atm *st) {
-  gpr_intptr state = gpr_atm_acq_load(st);
-
-  switch (state) {
-    case READY:
-      /* duplicate ready, ignore */
-      return;
-    case NOT_READY:
-      if (gpr_atm_rel_cas(st, NOT_READY, READY)) {
-        /* swap was successful -- the closure will run after the next
-           notify_on call. */
-        return;
-      }
-      /* swap was unsuccessful due to an intervening set_ready call.
-         Fall through to the WAITING code below */
-      state = gpr_atm_acq_load(st);
-    default: /* waiting */
-      GPR_ASSERT(gpr_atm_no_barrier_load(st) != READY &&
-                 gpr_atm_no_barrier_load(st) != NOT_READY);
-      grpc_exec_ctx_enqueue(exec_ctx, (grpc_closure *)state,
-                            !gpr_atm_acq_load(&fd->shutdown));
-      gpr_atm_rel_store(st, NOT_READY);
-      return;
+/* returns 1 if state becomes not ready */
+static int set_ready_locked(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
+                            grpc_closure **st) {
+  if (*st == CLOSURE_READY) {
+    /* duplicate ready ==> ignore */
+    return 0;
+  } else if (*st == CLOSURE_NOT_READY) {
+    /* not ready, and not waiting ==> flag ready */
+    *st = CLOSURE_READY;
+    return 0;
+  } else {
+    /* waiting ==> queue closure */
+    grpc_exec_ctx_enqueue(exec_ctx, *st, !fd->shutdown);
+    *st = CLOSURE_NOT_READY;
+    return 1;
   }
 }
 
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, gpr_atm *st) {
+static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure **st) {
   /* only one set_ready can be active at once (but there may be a racing
      notify_on) */
-  gpr_mu_lock(&fd->set_state_mu);
+  gpr_mu_lock(&fd->mu);
   set_ready_locked(exec_ctx, fd, st);
-  gpr_mu_unlock(&fd->set_state_mu);
+  gpr_mu_unlock(&fd->mu);
 }
 
 void grpc_fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  gpr_mu_lock(&fd->set_state_mu);
+  gpr_mu_lock(&fd->mu);
   GPR_ASSERT(!gpr_atm_no_barrier_load(&fd->shutdown));
-  gpr_atm_rel_store(&fd->shutdown, 1);
-  set_ready_locked(exec_ctx, fd, &fd->readst);
-  set_ready_locked(exec_ctx, fd, &fd->writest);
-  gpr_mu_unlock(&fd->set_state_mu);
+  fd->shutdown = 1;
+  set_ready_locked(exec_ctx, fd, &fd->read_closure);
+  set_ready_locked(exec_ctx, fd, &fd->write_closure);
+  gpr_mu_unlock(&fd->mu);
 }
 
 void grpc_fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                             grpc_closure *closure) {
-  notify_on(exec_ctx, fd, &fd->readst, closure);
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->read_closure, closure);
+  gpr_mu_unlock(&fd->mu);
 }
 
 void grpc_fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
                              grpc_closure *closure) {
-  notify_on(exec_ctx, fd, &fd->writest, closure);
+  gpr_mu_lock(&fd->mu);
+  notify_on_locked(exec_ctx, fd, &fd->write_closure, closure);
+  gpr_mu_unlock(&fd->mu);
 }
 
 gpr_uint32 grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              gpr_uint32 read_mask, gpr_uint32 write_mask,
-                              grpc_fd_watcher *watcher) {
+                              grpc_pollset_worker *worker, gpr_uint32 read_mask,
+                              gpr_uint32 write_mask, grpc_fd_watcher *watcher) {
   gpr_uint32 mask = 0;
+  grpc_closure *cur;
+  int requested;
   /* keep track of pollers that have requested our events, in case they change
    */
   GRPC_FD_REF(fd, "poll");
 
-  gpr_mu_lock(&fd->watcher_mu);
+  gpr_mu_lock(&fd->mu);
+
   /* if we are shutdown, then don't add to the watcher set */
   if (gpr_atm_no_barrier_load(&fd->shutdown)) {
     watcher->fd = NULL;
     watcher->pollset = NULL;
-    gpr_mu_unlock(&fd->watcher_mu);
+    watcher->worker = NULL;
+    gpr_mu_unlock(&fd->mu);
     GRPC_FD_UNREF(fd, "poll");
     return 0;
   }
+
   /* if there is nobody polling for read, but we need to, then start doing so */
-  if (read_mask && !fd->read_watcher &&
-      (gpr_uintptr)gpr_atm_acq_load(&fd->readst) > READY) {
+  cur = fd->read_closure;
+  requested = cur != CLOSURE_READY;
+  if (read_mask && fd->read_watcher == NULL && requested) {
     fd->read_watcher = watcher;
     mask |= read_mask;
   }
   /* if there is nobody polling for write, but we need to, then start doing so
    */
-  if (write_mask && !fd->write_watcher &&
-      (gpr_uintptr)gpr_atm_acq_load(&fd->writest) > READY) {
+  cur = fd->write_closure;
+  requested = cur != CLOSURE_READY;
+  if (write_mask && fd->write_watcher == NULL && requested) {
     fd->write_watcher = watcher;
     mask |= write_mask;
   }
   /* if not polling, remember this watcher in case we need someone to later */
-  if (mask == 0) {
+  if (mask == 0 && worker != NULL) {
     watcher->next = &fd->inactive_watcher_root;
     watcher->prev = watcher->next->prev;
     watcher->next->prev = watcher->prev->next = watcher;
   }
   watcher->pollset = pollset;
+  watcher->worker = worker;
   watcher->fd = fd;
-  gpr_mu_unlock(&fd->watcher_mu);
+  gpr_mu_unlock(&fd->mu);
 
   return mask;
 }
@@ -393,24 +370,39 @@ void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
     return;
   }
 
-  gpr_mu_lock(&fd->watcher_mu);
+  gpr_mu_lock(&fd->mu);
+
   if (watcher == fd->read_watcher) {
     /* remove read watcher, kick if we still need a read */
     was_polling = 1;
-    kick = kick || !got_read;
+    if (!got_read) {
+      kick = 1;
+    }
     fd->read_watcher = NULL;
   }
   if (watcher == fd->write_watcher) {
     /* remove write watcher, kick if we still need a write */
     was_polling = 1;
-    kick = kick || !got_write;
+    if (!got_write) {
+      kick = 1;
+    }
     fd->write_watcher = NULL;
   }
-  if (!was_polling) {
+  if (!was_polling && watcher->worker != NULL) {
     /* remove from inactive list */
     watcher->next->prev = watcher->prev;
     watcher->prev->next = watcher->next;
   }
+  if (got_read) {
+    if (set_ready_locked(exec_ctx, fd, &fd->read_closure)) {
+      kick = 1;
+    }
+  }
+  if (got_write) {
+    if (set_ready_locked(exec_ctx, fd, &fd->write_closure)) {
+      kick = 1;
+    }
+  }
   if (kick) {
     maybe_wake_one_watcher_locked(fd);
   }
@@ -419,17 +411,17 @@ void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *watcher,
     close(fd->fd);
     grpc_exec_ctx_enqueue(exec_ctx, fd->on_done_closure, 1);
   }
-  gpr_mu_unlock(&fd->watcher_mu);
+  gpr_mu_unlock(&fd->mu);
 
   GRPC_FD_UNREF(fd, "poll");
 }
 
 void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->readst);
+  set_ready(exec_ctx, fd, &fd->read_closure);
 }
 
 void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
-  set_ready(exec_ctx, fd, &fd->writest);
+  set_ready(exec_ctx, fd, &fd->write_closure);
 }
 
 #endif

src/core/iomgr/fd_posix.h

@@ -46,6 +46,7 @@ typedef struct grpc_fd_watcher {
   struct grpc_fd_watcher *next;
   struct grpc_fd_watcher *prev;
   grpc_pollset *pollset;
+  grpc_pollset_worker *worker;
   grpc_fd *fd;
 } grpc_fd_watcher;
 
@@ -58,8 +59,8 @@ struct grpc_fd {
      and just unref by 1 when we're ready to flag the object as orphaned */
   gpr_atm refst;
 
-  gpr_mu set_state_mu;
-  gpr_atm shutdown;
+  gpr_mu mu;
+  int shutdown;
   int closed;
 
   /* The watcher list.
@@ -84,18 +85,16 @@ struct grpc_fd {
      If at a later time there becomes need of a poller to poll, one of
      the inactive pollers may be kicked out of their poll loops to take
      that responsibility. */
-  gpr_mu watcher_mu;
   grpc_fd_watcher inactive_watcher_root;
   grpc_fd_watcher *read_watcher;
   grpc_fd_watcher *write_watcher;
 
-  gpr_atm readst;
-  gpr_atm writest;
+  grpc_closure *read_closure;
+  grpc_closure *write_closure;
 
   struct grpc_fd *freelist_next;
 
   grpc_closure *on_done_closure;
-  grpc_closure *shutdown_closures[2];
 
   grpc_iomgr_object iomgr_object;
 };
@@ -126,10 +125,12 @@ void grpc_fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *on_done,
    fd's current interest (such as epoll) do not need to call this function.
    MUST NOT be called with a pollset lock taken */
 gpr_uint32 grpc_fd_begin_poll(grpc_fd *fd, grpc_pollset *pollset,
-                              gpr_uint32 read_mask, gpr_uint32 write_mask,
-                              grpc_fd_watcher *rec);
+                              grpc_pollset_worker *worker, gpr_uint32 read_mask,
+                              gpr_uint32 write_mask, grpc_fd_watcher *rec);
 /* Complete polling previously started with grpc_fd_begin_poll
-   MUST NOT be called with a pollset lock taken */
+   MUST NOT be called with a pollset lock taken
+   if got_read or got_write are 1, also does the become_{readable,writable} as
+   appropriate. */
 void grpc_fd_end_poll(grpc_exec_ctx *exec_ctx, grpc_fd_watcher *rec,
                       int got_read, int got_write);
 

src/core/iomgr/pollset_multipoller_with_epoll.c

@@ -73,7 +73,7 @@ static void finally_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   /* We pretend to be polling whilst adding an fd to keep the fd from being
      closed during the add. This may result in a spurious wakeup being assigned
      to this pollset whilst adding, but that should be benign. */
-  GPR_ASSERT(grpc_fd_begin_poll(fd, pollset, 0, 0, &watcher) == 0);
+  GPR_ASSERT(grpc_fd_begin_poll(fd, pollset, NULL, 0, 0, &watcher) == 0);
   if (watcher.fd != NULL) {
     ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
     ev.data.ptr = fd;

src/core/iomgr/pollset_multipoller_with_poll_posix.c

@@ -102,6 +102,9 @@ static void multipoll_with_poll_pollset_del_fd(grpc_exec_ctx *exec_ctx,
 static void multipoll_with_poll_pollset_maybe_work_and_unlock(
     grpc_exec_ctx *exec_ctx, grpc_pollset *pollset, grpc_pollset_worker *worker,
     gpr_timespec deadline, gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
   int timeout;
   int r;
   size_t i, j, fd_count;
@@ -147,8 +150,8 @@ static void multipoll_with_poll_pollset_maybe_work_and_unlock(
   gpr_mu_unlock(&pollset->mu);
 
   for (i = 2; i < pfd_count; i++) {
-    pfds[i].events = (short)grpc_fd_begin_poll(watchers[i].fd, pollset, POLLIN,
-                                               POLLOUT, &watchers[i]);
+    pfds[i].events = (short)grpc_fd_begin_poll(watchers[i].fd, pollset, worker,
+                                               POLLIN, POLLOUT, &watchers[i]);
   }
 
   /* TODO(vpai): Consider first doing a 0 timeout poll here to avoid
@@ -157,34 +160,29 @@ static void multipoll_with_poll_pollset_maybe_work_and_unlock(
   r = grpc_poll_function(pfds, pfd_count, timeout);
   GRPC_SCHEDULING_END_BLOCKING_REGION;
 
-  for (i = 2; i < pfd_count; i++) {
-    grpc_fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN,
-                     pfds[i].revents & POLLOUT);
-  }
-
   if (r < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    for (i = 2; i < pfd_count; i++) {
+      grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
     }
   } else if (r == 0) {
-    /* do nothing */
+    for (i = 2; i < pfd_count; i++) {
+      grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
+    }
   } else {
-    if (pfds[0].revents & POLLIN) {
+    if (pfds[0].revents & POLLIN_CHECK) {
       grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
     }
-    if (pfds[1].revents & POLLIN) {
+    if (pfds[1].revents & POLLIN_CHECK) {
       grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd);
     }
     for (i = 2; i < pfd_count; i++) {
       if (watchers[i].fd == NULL) {
+        grpc_fd_end_poll(exec_ctx, &watchers[i], 0, 0);
         continue;
       }
-      if (pfds[i].revents & (POLLIN | POLLHUP | POLLERR)) {
-        grpc_fd_become_readable(exec_ctx, watchers[i].fd);
-      }
-      if (pfds[i].revents & (POLLOUT | POLLHUP | POLLERR)) {
-        grpc_fd_become_writable(exec_ctx, watchers[i].fd);
-      }
+      grpc_fd_end_poll(exec_ctx, &watchers[i], pfds[i].revents & POLLIN_CHECK,
+                       pfds[i].revents & POLLOUT_CHECK);
     }
   }
 

src/core/iomgr/pollset_posix.c

@@ -98,31 +98,63 @@ static void push_front_worker(grpc_pollset *p, grpc_pollset_worker *worker) {
   worker->prev->next = worker->next->prev = worker;
 }
 
-void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) {
+void grpc_pollset_kick_ext(grpc_pollset *p,
+                           grpc_pollset_worker *specific_worker,
+                           gpr_uint32 flags) {
   /* pollset->mu already held */
   if (specific_worker != NULL) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
+      GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
       for (specific_worker = p->root_worker.next;
            specific_worker != &p->root_worker;
            specific_worker = specific_worker->next) {
         grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd);
       }
       p->kicked_without_pollers = 1;
+      return;
     } else if (gpr_tls_get(&g_current_thread_worker) !=
                (gpr_intptr)specific_worker) {
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
+      grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd);
+      return;
+    } else if ((flags & GRPC_POLLSET_CAN_KICK_SELF) != 0) {
+      if ((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) != 0) {
+        specific_worker->reevaluate_polling_on_wakeup = 1;
+      }
       grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd);
+      return;
     }
   } else if (gpr_tls_get(&g_current_thread_poller) != (gpr_intptr)p) {
+    GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
     specific_worker = pop_front_worker(p);
     if (specific_worker != NULL) {
+      if (gpr_tls_get(&g_current_thread_worker) ==
+          (gpr_intptr)specific_worker) {
+        push_back_worker(p, specific_worker);
+        specific_worker = pop_front_worker(p);
+        if ((flags & GRPC_POLLSET_CAN_KICK_SELF) == 0 &&
+            gpr_tls_get(&g_current_thread_worker) ==
+                (gpr_intptr)specific_worker) {
+          push_back_worker(p, specific_worker);
+          return;
+        }
+      }
       push_back_worker(p, specific_worker);
       grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd);
+      return;
     } else {
       p->kicked_without_pollers = 1;
+      return;
     }
   }
 }
 
+void grpc_pollset_kick(grpc_pollset *p, grpc_pollset_worker *specific_worker) {
+  grpc_pollset_kick_ext(p, specific_worker, 0);
+}
+
 /* global state management */
 
 void grpc_pollset_global_init(void) {
@@ -195,55 +227,91 @@ void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
   /* pollset->mu already held */
   int added_worker = 0;
   int locked = 1;
+  int queued_work = 0;
+  int keep_polling = 0;
   GRPC_TIMER_BEGIN(GRPC_PTAG_POLLSET_WORK, 0);
   /* this must happen before we (potentially) drop pollset->mu */
   worker->next = worker->prev = NULL;
+  worker->reevaluate_polling_on_wakeup = 0;
   /* TODO(ctiller): pool these */
   grpc_wakeup_fd_init(&worker->wakeup_fd);
+  /* If there's work waiting for the pollset to be idle, and the
+     pollset is idle, then do that work */
   if (!grpc_pollset_has_workers(pollset) &&
       !grpc_closure_list_empty(pollset->idle_jobs)) {
     grpc_exec_ctx_enqueue_list(exec_ctx, &pollset->idle_jobs);
     goto done;
   }
+  /* Check alarms - these are a global resource so we just ping
+     each time through on every pollset.
+     May update deadline to ensure timely wakeups.
+     TODO(ctiller): can this work be localized? */
   if (grpc_alarm_check(exec_ctx, now, &deadline)) {
     gpr_mu_unlock(&pollset->mu);
     locked = 0;
     goto done;
   }
+  /* If we're shutting down then we don't execute any extended work */
   if (pollset->shutting_down) {
     goto done;
   }
+  /* Give do_promote priority so we don't starve it out */
   if (pollset->in_flight_cbs) {
-    /* Give do_promote priority so we don't starve it out */
     gpr_mu_unlock(&pollset->mu);
     locked = 0;
     goto done;
   }
-  if (!pollset->kicked_without_pollers) {
-    push_front_worker(pollset, worker);
-    added_worker = 1;
-    gpr_tls_set(&g_current_thread_poller, (gpr_intptr)pollset);
-    gpr_tls_set(&g_current_thread_worker, (gpr_intptr)worker);
-    GRPC_TIMER_BEGIN(GRPC_PTAG_POLLSET_WORK, 0);
-    pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, worker, deadline,
-                                           now);
-    GRPC_TIMER_END(GRPC_PTAG_POLLSET_WORK, 0);
-    locked = 0;
-    gpr_tls_set(&g_current_thread_poller, 0);
-    gpr_tls_set(&g_current_thread_worker, 0);
-  } else {
-    pollset->kicked_without_pollers = 0;
-  }
-done:
-  if (!locked) {
-    grpc_exec_ctx_flush(exec_ctx);
-    gpr_mu_lock(&pollset->mu);
-    locked = 1;
+  /* Start polling, and keep doing so while we're being asked to
+     re-evaluate our pollers (this allows poll() based pollers to
+     ensure they don't miss wakeups) */
+  keep_polling = 1;
+  while (keep_polling) {
+    keep_polling = 0;
+    if (!pollset->kicked_without_pollers) {
+      if (!added_worker) {
+        push_front_worker(pollset, worker);
+        added_worker = 1;
+      }
+      gpr_tls_set(&g_current_thread_poller, (gpr_intptr)pollset);
+      gpr_tls_set(&g_current_thread_worker, (gpr_intptr)worker);
+      GRPC_TIMER_BEGIN(GRPC_PTAG_POLLSET_WORK, 0);
+      pollset->vtable->maybe_work_and_unlock(exec_ctx, pollset, worker,
+                                             deadline, now);
+      GRPC_TIMER_END(GRPC_PTAG_POLLSET_WORK, 0);
+      locked = 0;
+      gpr_tls_set(&g_current_thread_poller, 0);
+      gpr_tls_set(&g_current_thread_worker, 0);
+    } else {
+      pollset->kicked_without_pollers = 0;
+    }
+  /* Finished execution - start cleaning up.
+     Note that we may arrive here from outside the enclosing while() loop.
+     In that case we won't loop though as we haven't added worker to the
+     worker list, which means nobody could ask us to re-evaluate polling). */
+  done:
+    if (!locked) {
+      queued_work |= grpc_exec_ctx_flush(exec_ctx);
+      gpr_mu_lock(&pollset->mu);
+      locked = 1;
+    }
+    /* If we're forced to re-evaluate polling (via grpc_pollset_kick with
+       GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) then we land here and force
+       a loop */
+    if (worker->reevaluate_polling_on_wakeup) {
+      worker->reevaluate_polling_on_wakeup = 0;
+      pollset->kicked_without_pollers = 0;
+      if (queued_work) {
+        /* If there's queued work on the list, then set the deadline to be
+           immediate so we get back out of the polling loop quickly */
+        deadline = gpr_inf_past(GPR_CLOCK_MONOTONIC);
+      }
+      keep_polling = 1;
+    }
   }
-  grpc_wakeup_fd_destroy(&worker->wakeup_fd);
   if (added_worker) {
     remove_worker(pollset, worker);
   }
+  grpc_wakeup_fd_destroy(&worker->wakeup_fd);
   if (pollset->shutting_down) {
     if (grpc_pollset_has_workers(pollset)) {
       grpc_pollset_kick(pollset, NULL);
@@ -458,6 +526,9 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
                                                 grpc_pollset_worker *worker,
                                                 gpr_timespec deadline,
                                                 gpr_timespec now) {
+#define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
+#define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
+
   struct pollfd pfd[3];
   grpc_fd *fd;
   grpc_fd_watcher fd_watcher;
@@ -483,8 +554,8 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
     pfd[2].revents = 0;
     GRPC_FD_REF(fd, "basicpoll_begin");
     gpr_mu_unlock(&pollset->mu);
-    pfd[2].events =
-        (short)grpc_fd_begin_poll(fd, pollset, POLLIN, POLLOUT, &fd_watcher);
+    pfd[2].events = (short)grpc_fd_begin_poll(fd, pollset, worker, POLLIN,
+                                              POLLOUT, &fd_watcher);
     if (pfd[2].events != 0) {
       nfds++;
     }
@@ -502,31 +573,27 @@ static void basic_pollset_maybe_work_and_unlock(grpc_exec_ctx *exec_ctx,
   GRPC_SCHEDULING_END_BLOCKING_REGION;
   GRPC_TIMER_END(GRPC_PTAG_POLL, 0);
 
-  if (fd) {
-    grpc_fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN,
-                     pfd[2].revents & POLLOUT);
-  }
-
   if (r < 0) {
-    if (errno != EINTR) {
-      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    if (fd) {
+      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
     }
   } else if (r == 0) {
-    /* do nothing */
+    if (fd) {
+      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
+    }
   } else {
-    if (pfd[0].revents & POLLIN) {
+    if (pfd[0].revents & POLLIN_CHECK) {
       grpc_wakeup_fd_consume_wakeup(&grpc_global_wakeup_fd);
     }
-    if (pfd[1].revents & POLLIN) {
+    if (pfd[1].revents & POLLIN_CHECK) {
       grpc_wakeup_fd_consume_wakeup(&worker->wakeup_fd);
     }
     if (nfds > 2) {
-      if (pfd[2].revents & (POLLIN | POLLHUP | POLLERR)) {
-        grpc_fd_become_readable(exec_ctx, fd);
-      }
-      if (pfd[2].revents & (POLLOUT | POLLHUP | POLLERR)) {
-        grpc_fd_become_writable(exec_ctx, fd);
-      }
+      grpc_fd_end_poll(exec_ctx, &fd_watcher, pfd[2].revents & POLLIN_CHECK,
+                       pfd[2].revents & POLLOUT_CHECK);
+    } else if (fd) {
+      grpc_fd_end_poll(exec_ctx, &fd_watcher, 0, 0);
     }
   }
 

src/core/iomgr/pollset_posix.h

@@ -50,6 +50,7 @@ struct grpc_fd;
 
 typedef struct grpc_pollset_worker {
   grpc_wakeup_fd wakeup_fd;
+  int reevaluate_polling_on_wakeup;
   struct grpc_pollset_worker *next;
   struct grpc_pollset_worker *prev;
 } grpc_pollset_worker;
@@ -111,6 +112,16 @@ void grpc_kick_drain(grpc_pollset *p);
 int grpc_poll_deadline_to_millis_timeout(gpr_timespec deadline,
                                          gpr_timespec now);
 
+/* Allow kick to wakeup the currently polling worker */
+#define GRPC_POLLSET_CAN_KICK_SELF 1
+/* Force the wakee to repoll when awoken */
+#define GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP 2
+/* As per grpc_pollset_kick, with an extended set of flags (defined above)
+   -- mostly for fd_posix's use. */
+void grpc_pollset_kick_ext(grpc_pollset *p,
+                           grpc_pollset_worker *specific_worker,
+                           gpr_uint32 flags);
+
 /* turn a pollset into a multipoller: platform specific */
 typedef void (*grpc_platform_become_multipoller_type)(grpc_exec_ctx *exec_ctx,
                                                       grpc_pollset *pollset,

src/core/iomgr/tcp_server_windows.c

@@ -336,6 +336,8 @@ static void on_accept(grpc_exec_ctx *exec_ctx, void *arg, int from_iocp) {
                            peer_name_string);
       gpr_free(fd_name);
       gpr_free(peer_name_string);
+    } else {
+      closesocket(sock);
     }
   }
 

src/core/iomgr/udp_server.c

@@ -278,7 +278,7 @@ static void on_read(grpc_exec_ctx *exec_ctx, void *arg, int success) {
 
   /* Tell the registered callback that data is available to read. */
   GPR_ASSERT(sp->read_cb);
-  sp->read_cb(sp->emfd, sp->server->grpc_server);
+  sp->read_cb(exec_ctx, sp->emfd, sp->server->grpc_server);
 
   /* Re-arm the notification event so we get another chance to read. */
   grpc_fd_notify_on_read(exec_ctx, sp->emfd, &sp->read_closure);

src/core/iomgr/udp_server.h

@@ -43,7 +43,8 @@ typedef struct grpc_server grpc_server;
 typedef struct grpc_udp_server grpc_udp_server;
 
 /* Called when data is available to read from the socket. */
-typedef void (*grpc_udp_server_read_cb)(grpc_fd *emfd, grpc_server *server);
+typedef void (*grpc_udp_server_read_cb)(grpc_exec_ctx *exec_ctx, grpc_fd *emfd,
+                                        grpc_server *server);
 
 /* Create a server, initially not bound to any ports */
 grpc_udp_server *grpc_udp_server_create(void);

src/core/surface/byte_buffer.c

@@ -97,4 +97,5 @@ size_t grpc_byte_buffer_length(grpc_byte_buffer *bb) {
   }
   gpr_log(GPR_ERROR, "should never reach here");
   abort();
+  return 0;
 }

src/core/surface/call.c

@@ -425,12 +425,18 @@ static grpc_cq_completion *allocate_completion(grpc_call *call) {
     if (call->allocated_completions & (1u << i)) {
       continue;
     }
-    call->allocated_completions |= (gpr_uint8)(1u << i);
+    /* NB: the following integer arithmetic operation needs to be in its
+     * expanded form due to the "integral promotion" performed (see section
+     * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
+     * is then required to avoid the compiler warning */
+    call->allocated_completions =
+        (gpr_uint8)(call->allocated_completions | (1u << i));
     gpr_mu_unlock(&call->completion_mu);
     return &call->completions[i];
   }
   gpr_log(GPR_ERROR, "should never reach here");
   abort();
+  return NULL;
 }
 
 static void done_completion(grpc_exec_ctx *exec_ctx, void *call,
@@ -740,7 +746,11 @@ static void finish_live_ioreq_op(grpc_call *call, grpc_ioreq_op op,
   size_t i;
   /* ioreq is live: we need to do something */
   master = &call->masters[master_set];
-  master->complete_mask |= (gpr_uint16)(1u << op);
+  /* NB: the following integer arithmetic operation needs to be in its
+   * expanded form due to the "integral promotion" performed (see section
+   * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
+   * is then required to avoid the compiler warning */
+  master->complete_mask = (gpr_uint16)(master->complete_mask | (1u << op));
   if (!success) {
     master->success = 0;
   }
@@ -931,6 +941,7 @@ static int add_slice_to_message(grpc_call *call, gpr_slice slice) {
   }
   /* we have to be reading a message to know what to do here */
   if (!call->reading_message) {
+    gpr_slice_unref(slice);
     cancel_with_status(call, GRPC_STATUS_INVALID_ARGUMENT,
                        "Received payload data while not reading a message");
     return 0;
@@ -1250,7 +1261,11 @@ static grpc_call_error start_ioreq(grpc_call *call, const grpc_ioreq *reqs,
                            GRPC_MDSTR_REF(reqs[i].data.send_status.details));
       }
     }
-    have_ops |= (gpr_uint16)(1u << op);
+    /* NB: the following integer arithmetic operation needs to be in its
+     * expanded form due to the "integral promotion" performed (see section
+     * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
+     * is then required to avoid the compiler warning */
+    have_ops = (gpr_uint16)(have_ops | (1u << op));
 
     call->request_data[op] = data;
     call->request_flags[op] = reqs[i].flags;

src/core/transport/chttp2/bin_encoder.c

@@ -185,8 +185,12 @@ gpr_slice grpc_chttp2_huffman_compress(gpr_slice input) {
   }
 
   if (temp_length) {
-    *out++ = (gpr_uint8)(temp << (8u - temp_length)) |
-             (gpr_uint8)(0xffu >> temp_length);
+    /* NB: the following integer arithmetic operation needs to be in its
+     * expanded form due to the "integral promotion" performed (see section
+     * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
+     * is then required to avoid the compiler warning */
+    *out++ = (gpr_uint8)((gpr_uint8)(temp << (8u - temp_length)) |
+                         (gpr_uint8)(0xffu >> temp_length));
   }
 
   GPR_ASSERT(out == GPR_SLICE_END_PTR(output));
@@ -265,8 +269,12 @@ gpr_slice grpc_chttp2_base64_encode_and_huffman_compress(gpr_slice input) {
   }
 
   if (out.temp_length) {
-    *out.out++ = (gpr_uint8)(out.temp << (8u - out.temp_length)) |
-                 (gpr_uint8)(0xffu >> out.temp_length);
+    /* NB: the following integer arithmetic operation needs to be in its
+     * expanded form due to the "integral promotion" performed (see section
+     * 3.2.1.1 of the C89 draft standard). A cast to the smaller container type
+     * is then required to avoid the compiler warning */
+    *out.out++ = (gpr_uint8)((gpr_uint8)(out.temp << (8u - out.temp_length)) |
+                             (gpr_uint8)(0xffu >> out.temp_length));
   }
 
   GPR_ASSERT(out.out <= GPR_SLICE_END_PTR(output));

src/core/tsi/fake_transport_security.c

@@ -118,10 +118,10 @@ static gpr_uint32 load32_little_endian(const unsigned char *buf) {
 }
 
 static void store32_little_endian(gpr_uint32 value, unsigned char *buf) {
-  buf[3] = (unsigned char)(value >> 24) & 0xFF;
-  buf[2] = (unsigned char)(value >> 16) & 0xFF;
-  buf[1] = (unsigned char)(value >> 8) & 0xFF;
-  buf[0] = (unsigned char)(value)&0xFF;
+  buf[3] = (unsigned char)((value >> 24) & 0xFF);
+  buf[2] = (unsigned char)((value >> 16) & 0xFF);
+  buf[1] = (unsigned char)((value >> 8) & 0xFF);
+  buf[0] = (unsigned char)((value) & 0xFF);
 }
 
 static void tsi_fake_frame_reset(tsi_fake_frame *frame, int needs_draining) {

src/csharp/Grpc.Auth/AuthInterceptors.cs

@@ -41,8 +41,8 @@ using Grpc.Core.Utils;
 namespace Grpc.Auth
 {
     /// <summary>
-    /// Factory methods to create authorization interceptors. Interceptors created can be registered with gRPC client classes (autogenerated client stubs that
-    /// inherit from <see cref="Grpc.Core.ClientBase"/>).
+    /// Factory methods to create authorization interceptors.
+    /// <seealso cref="GrpcCredentials"/>
     /// </summary>
     public static class AuthInterceptors
     {
@@ -50,31 +50,29 @@ namespace Grpc.Auth
         private const string Schema = "Bearer";
 
         /// <summary>
-        /// Creates interceptor that will obtain access token from any credential type that implements
+        /// Creates an <see cref="AsyncAuthInterceptor"/> that will obtain access token from any credential type that implements
         /// <c>ITokenAccess</c>. (e.g. <c>GoogleCredential</c>).
         /// </summary>
         /// <param name="credential">The credential to use to obtain access tokens.</param>
-        /// <returns>The header interceptor.</returns>
-        public static HeaderInterceptor FromCredential(ITokenAccess credential)
+        /// <returns>The interceptor.</returns>
+        public static AsyncAuthInterceptor FromCredential(ITokenAccess credential)
         {
-            return new HeaderInterceptor((method, authUri, metadata) =>
+            return new AsyncAuthInterceptor(async (authUri, metadata) =>
             {
-                // TODO(jtattermusch): Rethink synchronous wait to obtain the result.
-                var accessToken = credential.GetAccessTokenForRequestAsync(authUri, CancellationToken.None)
-                        .ConfigureAwait(false).GetAwaiter().GetResult();
+                var accessToken = await credential.GetAccessTokenForRequestAsync(authUri, CancellationToken.None).ConfigureAwait(false);
                 metadata.Add(CreateBearerTokenHeader(accessToken));
             });
         }
 
         /// <summary>
-        /// Creates OAuth2 interceptor that will use given access token as authorization.
+        /// Creates an <see cref="AsyncAuthInterceptor"/> that will use given access token as authorization.
         /// </summary>
         /// <param name="accessToken">OAuth2 access token.</param>
-        /// <returns>The header interceptor.</returns>
-        public static HeaderInterceptor FromAccessToken(string accessToken)
+        /// <returns>The interceptor.</returns>
+        public static AsyncAuthInterceptor FromAccessToken(string accessToken)
         {
             Preconditions.CheckNotNull(accessToken);
-            return new HeaderInterceptor((method, authUri, metadata) =>
+            return new AsyncAuthInterceptor(async (authUri, metadata) =>
             {
                 metadata.Add(CreateBearerTokenHeader(accessToken));
             });

src/csharp/Grpc.Auth/Grpc.Auth.csproj

@@ -78,6 +78,7 @@
     <Compile Include="..\Grpc.Core\Version.cs">
       <Link>Version.cs</Link>
     </Compile>
+    <Compile Include="GrpcCredentials.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="AuthInterceptors.cs" />
   </ItemGroup>

src/csharp/Grpc.Auth/GrpcCredentials.cs

@@ -0,0 +1,93 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Threading;
+
+using Google.Apis.Auth.OAuth2;
+using Grpc.Core;
+using Grpc.Core.Utils;
+
+namespace Grpc.Auth
+{
+    /// <summary>
+    /// Factory methods to create instances of <see cref="ChannelCredentials"/> and <see cref="CallCredentials"/> classes.
+    /// </summary>
+    public static class GrpcCredentials
+    {
+        /// <summary>
+        /// Creates a <see cref="MetadataCredentials"/> instance that will obtain access tokens 
+        /// from any credential that implements <c>ITokenAccess</c>. (e.g. <c>GoogleCredential</c>).
+        /// </summary>
+        /// <param name="credential">The credential to use to obtain access tokens.</param>
+        /// <returns>The <c>MetadataCredentials</c> instance.</returns>
+        public static MetadataCredentials Create(ITokenAccess credential)
+        {
+            return new MetadataCredentials(AuthInterceptors.FromCredential(credential));
+        }
+
+        /// <summary>
+        /// Convenience method to create a <see cref="ChannelCredentials"/> instance from
+        /// <c>ITokenAccess</c> credential and <c>SslCredentials</c> instance.
+        /// </summary>
+        /// <param name="credential">The credential to use to obtain access tokens.</param>
+        /// <param name="sslCredentials">The <c>SslCredentials</c> instance.</param>
+        /// <returns>The channel credentials for access token based auth over a secure channel.</returns>
+        public static ChannelCredentials Create(ITokenAccess credential, SslCredentials sslCredentials)
+        {
+            return ChannelCredentials.Create(sslCredentials, Create(credential));
+        }
+
+        /// <summary>
+        /// Creates an instance of <see cref="MetadataCredentials"/> that will use given access token to authenticate
+        /// with a gRPC service.
+        /// </summary>
+        /// <param name="accessToken">OAuth2 access token.</param>
+        /// /// <returns>The <c>MetadataCredentials</c> instance.</returns>
+        public static MetadataCredentials FromAccessToken(string accessToken)
+        {
+            return new MetadataCredentials(AuthInterceptors.FromAccessToken(accessToken));
+        }
+
+        /// <summary>
+        /// Converts a <c>ITokenAccess</c> object into a <see cref="MetadataCredentials"/> object supported
+        /// by gRPC.
+        /// </summary>
+        /// <param name="credential"></param>
+        /// <returns></returns>
+        public static MetadataCredentials ToGrpcCredentials(this ITokenAccess credential)
+        {
+            return GrpcCredentials.Create(credential);
+        }
+    }
+}

src/csharp/Grpc.Core.Tests/CallCredentialsTest.cs

@@ -32,6 +32,10 @@
 #endregion
 
 using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
 using Grpc.Core;
 using Grpc.Core.Internal;
 using Grpc.Core.Utils;
@@ -39,24 +43,23 @@ using NUnit.Framework;
 
 namespace Grpc.Core.Tests
 {
-    public class ClientBaseTest
+    public class CallCredentialsTest
     {
         [Test]
-        public void GetAuthUriBase_Valid()
+        public void CallCredentials_ComposeAtLeastTwo()
         {
-            Assert.AreEqual("https://some.googleapi.com/", ClientBase.GetAuthUriBase("some.googleapi.com"));
-            Assert.AreEqual("https://some.googleapi.com/", ClientBase.GetAuthUriBase("dns:///some.googleapi.com/"));
-            Assert.AreEqual("https://some.googleapi.com/", ClientBase.GetAuthUriBase("dns:///some.googleapi.com:443/"));
-            Assert.AreEqual("https://some.googleapi.com/", ClientBase.GetAuthUriBase("some.googleapi.com:443/"));
+            Assert.Throws(typeof(ArgumentException), () => CallCredentials.Compose(new FakeCallCredentials()));
         }
 
         [Test]
-        public void GetAuthUriBase_Invalid()
+        public void CallCredentials_ToNativeCredentials()
         {
-            Assert.IsNull(ClientBase.GetAuthUriBase("some.googleapi.com:"));
-            Assert.IsNull(ClientBase.GetAuthUriBase("https://some.googleapi.com/"));
-            Assert.IsNull(ClientBase.GetAuthUriBase("dns://some.googleapi.com:443"));  // just two slashes
-            Assert.IsNull(ClientBase.GetAuthUriBase(""));
+            var composite = CallCredentials.Compose(
+                new MetadataCredentials(async (uri, m) => { await Task.Delay(1); }),
+                new MetadataCredentials(async (uri, m) => { await Task.Delay(2); }));
+            using (var nativeComposite = composite.ToNativeCredentials())
+            {
+            }
         }
     }
 }

src/csharp/Grpc.Core.Tests/ChannelCredentialsTest.cs

@@ -1,3 +1,4 @@
+#region Copyright notice and license
 
 // Copyright 2015, Google Inc.
 // All rights reserved.
@@ -28,16 +29,45 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto3";
+#endregion
 
-package grpc.testing;
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
 
-// An empty message that you can re-use to avoid defining duplicated empty
-// messages in your project. A typical example is to use it as argument or the
-// return value of a service API. For instance:
-//
-//   service Foo {
-//     rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
-//   };
-//
-message Empty {}
+namespace Grpc.Core.Tests
+{
+    public class ChannelCredentialsTest
+    {
+        [Test]
+        public void InsecureCredentials_IsNonComposable()
+        {
+            Assert.IsFalse(ChannelCredentials.Insecure.IsComposable);
+        }
+
+        [Test]
+        public void ChannelCredentials_CreateComposite()
+        {
+            var composite = ChannelCredentials.Create(new FakeChannelCredentials(true), new FakeCallCredentials());
+            Assert.IsFalse(composite.IsComposable);
+
+            Assert.Throws(typeof(ArgumentNullException), () => ChannelCredentials.Create(null, new FakeCallCredentials()));
+            Assert.Throws(typeof(ArgumentNullException), () => ChannelCredentials.Create(new FakeChannelCredentials(true), null));
+            
+            // forbid composing non-composable
+            Assert.Throws(typeof(ArgumentException), () => ChannelCredentials.Create(new FakeChannelCredentials(false), new FakeCallCredentials()));
+        }
+
+        [Test]
+        public void ChannelCredentials_CreateWrapped()
+        {
+            ChannelCredentials.Create(new FakeCallCredentials());
+        }
+    }
+}

src/csharp/Grpc.Core.Tests/ChannelTest.cs

@@ -44,13 +44,13 @@ namespace Grpc.Core.Tests
         [Test]
         public void Constructor_RejectsInvalidParams()
         {
-            Assert.Throws(typeof(ArgumentNullException), () => new Channel(null, Credentials.Insecure));
+            Assert.Throws(typeof(ArgumentNullException), () => new Channel(null, ChannelCredentials.Insecure));
         }
 
         [Test]
         public void State_IdleAfterCreation()
         {
-            var channel = new Channel("localhost", Credentials.Insecure);
+            var channel = new Channel("localhost", ChannelCredentials.Insecure);
             Assert.AreEqual(ChannelState.Idle, channel.State);
             channel.ShutdownAsync().Wait();
         }
@@ -58,7 +58,7 @@ namespace Grpc.Core.Tests
         [Test]
         public void WaitForStateChangedAsync_InvalidArgument()
         {
-            var channel = new Channel("localhost", Credentials.Insecure);
+            var channel = new Channel("localhost", ChannelCredentials.Insecure);
             Assert.Throws(typeof(ArgumentException), () => channel.WaitForStateChangedAsync(ChannelState.FatalFailure));
             channel.ShutdownAsync().Wait();
         }
@@ -66,7 +66,7 @@ namespace Grpc.Core.Tests
         [Test]
         public void ResolvedTarget()
         {
-            var channel = new Channel("127.0.0.1", Credentials.Insecure);
+            var channel = new Channel("127.0.0.1", ChannelCredentials.Insecure);
             Assert.IsTrue(channel.ResolvedTarget.Contains("127.0.0.1"));
             channel.ShutdownAsync().Wait();
         }
@@ -74,7 +74,7 @@ namespace Grpc.Core.Tests
         [Test]
         public void Shutdown_AllowedOnlyOnce()
         {
-            var channel = new Channel("localhost", Credentials.Insecure);
+            var channel = new Channel("localhost", ChannelCredentials.Insecure);
             channel.ShutdownAsync().Wait();
             Assert.Throws(typeof(InvalidOperationException), () => channel.ShutdownAsync().GetAwaiter().GetResult());
         }

src/csharp/Grpc.Core.Tests/FakeCredentials.cs

@@ -1,3 +1,5 @@
+#region Copyright notice and license
+
 // Copyright 2015, Google Inc.
 // All rights reserved.
 //
@@ -27,36 +29,45 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-syntax = "proto3";
+#endregion
 
-package examples;
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+using NUnit.Framework;
 
-// Protocol type definitions
-message StockRequest {
-  string symbol = 1;
-  int32 num_trades_to_watch = 2;
-}
+namespace Grpc.Core.Tests
+{
+    internal class FakeChannelCredentials : ChannelCredentials
+    {
+        readonly bool composable;
 
-message StockReply {
-  float price = 1;
-  string symbol = 2;
-}
+        public FakeChannelCredentials(bool composable)
+        {
+            this.composable = composable;
+        }
 
+        internal override bool IsComposable
+        {
+            get { return composable; }
+        }
 
-// Interface exported by the server
-service Stock {
-  // Simple blocking RPC
-  rpc GetLastTradePrice(StockRequest) returns (StockReply) {
-  }
-  // Bidirectional streaming RPC
-  rpc GetLastTradePriceMultiple(stream StockRequest) returns
-    (stream StockReply) {
-  }
-  // Unidirectional server-to-client streaming RPC
-  rpc WatchFutureTrades(StockRequest) returns (stream StockReply) {
-  }
-  // Unidirectional client-to-server streaming RPC
-  rpc GetHighestTradePrice(stream StockRequest) returns (StockReply) {
-  }
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            return null;
+        }
+    }
 
+    internal class FakeCallCredentials : CallCredentials
+    {
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            return null;
+        }
+    }
 }

src/csharp/Grpc.Core.Tests/Grpc.Core.Tests.csproj

@@ -63,8 +63,10 @@
     <Compile Include="..\Grpc.Core\Version.cs">
       <Link>Version.cs</Link>
     </Compile>
-    <Compile Include="ClientBaseTest.cs" />
+    <Compile Include="CallCredentialsTest.cs" />
+    <Compile Include="FakeCredentials.cs" />
     <Compile Include="MarshallingErrorsTest.cs" />
+    <Compile Include="ChannelCredentialsTest.cs" />
     <Compile Include="ShutdownTest.cs" />
     <Compile Include="Internal\AsyncCallTest.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />

src/csharp/Grpc.Core.Tests/Internal/AsyncCallTest.cs

@@ -49,7 +49,7 @@ namespace Grpc.Core.Internal.Tests
         [SetUp]
         public void Init()
         {
-            channel = new Channel("localhost", Credentials.Insecure);
+            channel = new Channel("localhost", ChannelCredentials.Insecure);
 
             fakeCall = new FakeNativeCall();
 

src/csharp/Grpc.Core.Tests/MarshallingErrorsTest.cs

@@ -119,7 +119,7 @@ namespace Grpc.Core.Tests
         [Test]
         public void RequestParsingError_UnaryRequest()
         {
-            helper.UnaryHandler = new  UnaryServerMethod<string, string>((request, context) =>
+            helper.UnaryHandler = new UnaryServerMethod<string, string>((request, context) =>
             {
                 return Task.FromResult("RESPONSE");
             });
@@ -161,7 +161,7 @@ namespace Grpc.Core.Tests
         {
             helper.ClientStreamingHandler = new ClientStreamingServerMethod<string, string>(async (requestStream, context) =>
             {
-                CollectionAssert.AreEqual(new [] {"A", "B"}, await requestStream.ToListAsync());
+                CollectionAssert.AreEqual(new[] { "A", "B" }, await requestStream.ToListAsync());
                 return "RESPONSE";
             });
             var call = Calls.AsyncClientStreamingCall(helper.CreateClientStreamingCall());

src/csharp/Grpc.Core.Tests/MockServiceHelper.cs

@@ -154,7 +154,7 @@ namespace Grpc.Core.Tests
         {
             if (channel == null)
             {
-                channel = new Channel(Host, GetServer().Ports.Single().BoundPort, Credentials.Insecure);
+                channel = new Channel(Host, GetServer().Ports.Single().BoundPort, ChannelCredentials.Insecure);
             }
             return channel;
         }

src/csharp/Grpc.Core/CallCredentials.cs

@@ -0,0 +1,142 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Client-side call credentials. Provide authorization with per-call granularity.
+    /// </summary>
+    public abstract class CallCredentials
+    {
+        /// <summary>
+        /// Composes multiple multiple <c>CallCredentials</c> objects into
+        /// a single <c>CallCredentials</c> object.
+        /// </summary>
+        /// <param name="credentials">credentials to compose</param>
+        /// <returns>The new <c>CompositeCallCredentials</c></returns>
+        public static CallCredentials Compose(params CallCredentials[] credentials)
+        {
+            return new CompositeCallCredentials(credentials);
+        }
+
+        /// <summary>
+        /// Creates native object for the credentials.
+        /// </summary>
+        /// <returns>The native credentials.</returns>
+        internal abstract CredentialsSafeHandle ToNativeCredentials();
+    }
+
+    /// <summary>
+    /// Asynchronous authentication interceptor for <see cref="MetadataCredentials"/>.
+    /// </summary>
+    /// <param name="authUri">URL of a service to which current remote call needs to authenticate</param>
+    /// <param name="metadata">Metadata to populate with entries that will be added to outgoing call's headers.</param>
+    /// <returns></returns>
+    public delegate Task AsyncAuthInterceptor(string authUri, Metadata metadata);
+
+    /// <summary>
+    /// Client-side credentials that delegate metadata based auth to an interceptor.
+    /// The interceptor is automatically invoked for each remote call that uses <c>MetadataCredentials.</c>
+    /// </summary>
+    public class MetadataCredentials : CallCredentials
+    {
+        readonly AsyncAuthInterceptor interceptor;
+
+        /// <summary>
+        /// Initializes a new instance of <c>MetadataCredentials</c> class.
+        /// </summary>
+        /// <param name="interceptor">authentication interceptor</param>
+        public MetadataCredentials(AsyncAuthInterceptor interceptor)
+        {
+            this.interceptor = interceptor;
+        }
+
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            NativeMetadataCredentialsPlugin plugin = new NativeMetadataCredentialsPlugin(interceptor);
+            return plugin.Credentials;
+        }
+    }
+
+    /// <summary>
+    /// Credentials that allow composing multiple credentials objects into one <see cref="CallCredentials"/> object.
+    /// </summary>
+    internal sealed class CompositeCallCredentials : CallCredentials
+    {
+        readonly List<CallCredentials> credentials;
+
+        /// <summary>
+        /// Initializes a new instance of <c>CompositeCallCredentials</c> class.
+        /// The resulting credentials object will be composite of all the credentials specified as parameters.
+        /// </summary>
+        /// <param name="credentials">credentials to compose</param>
+        public CompositeCallCredentials(params CallCredentials[] credentials)
+        {
+            Preconditions.CheckArgument(credentials.Length >= 2, "Composite credentials object can only be created from 2 or more credentials.");
+            this.credentials = new List<CallCredentials>(credentials);
+        }
+
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            return ToNativeRecursive(0);
+        }
+
+        // Recursive descent makes managing lifetime of intermediate CredentialSafeHandle instances easier.
+        // In practice, we won't usually see composites from more than two credentials anyway.
+        private CredentialsSafeHandle ToNativeRecursive(int startIndex)
+        {
+            if (startIndex == credentials.Count - 1)
+            {
+                return credentials[startIndex].ToNativeCredentials();
+            }
+
+            using (var cred1 = credentials[startIndex].ToNativeCredentials())
+            using (var cred2 = ToNativeRecursive(startIndex + 1))
+            {
+                var nativeComposite = CredentialsSafeHandle.CreateComposite(cred1, cred2);
+                if (nativeComposite.IsInvalid)
+                {
+                    throw new ArgumentException("Error creating native composite credentials. Likely, this is because you are trying to compose incompatible credentials.");
+                }
+                return nativeComposite;
+            }
+        }
+    }
+}

src/csharp/Grpc.Core/CallOptions.cs

@@ -49,6 +49,7 @@ namespace Grpc.Core
         CancellationToken cancellationToken;
         WriteOptions writeOptions;
         ContextPropagationToken propagationToken;
+        CallCredentials credentials;
 
         /// <summary>
         /// Creates a new instance of <c>CallOptions</c> struct.
@@ -58,14 +59,16 @@ namespace Grpc.Core
         /// <param name="cancellationToken">Can be used to request cancellation of the call.</param>
         /// <param name="writeOptions">Write options that will be used for this call.</param>
         /// <param name="propagationToken">Context propagation token obtained from <see cref="ServerCallContext"/>.</param>
+        /// <param name="credentials">Credentials to use for this call.</param>
         public CallOptions(Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken),
-                           WriteOptions writeOptions = null, ContextPropagationToken propagationToken = null)
+                           WriteOptions writeOptions = null, ContextPropagationToken propagationToken = null, CallCredentials credentials = null)
         {
             this.headers = headers;
             this.deadline = deadline;
             this.cancellationToken = cancellationToken;
             this.writeOptions = writeOptions;
             this.propagationToken = propagationToken;
+            this.credentials = credentials;
         }
 
         /// <summary>
@@ -114,6 +117,17 @@ namespace Grpc.Core
             }
         }
 
+        /// <summary>
+        /// Credentials to use for this call.
+        /// </summary>
+        public CallCredentials Credentials
+        {
+            get
+            {
+                return this.credentials;
+            }
+        }
+
         /// <summary>
         /// Returns new instance of <see cref="CallOptions"/> with
         /// <c>Headers</c> set to the value provided. Values of all other fields are preserved.

src/csharp/Grpc.Core/Channel.cs

@@ -68,7 +68,7 @@ namespace Grpc.Core
         /// <param name="target">Target of the channel.</param>
         /// <param name="credentials">Credentials to secure the channel.</param>
         /// <param name="options">Channel options.</param>
-        public Channel(string target, Credentials credentials, IEnumerable<ChannelOption> options = null)
+        public Channel(string target, ChannelCredentials credentials, IEnumerable<ChannelOption> options = null)
         {
             this.target = Preconditions.CheckNotNull(target, "target");
             this.environment = GrpcEnvironment.AddRef();
@@ -96,7 +96,7 @@ namespace Grpc.Core
         /// <param name="port">The port.</param>
         /// <param name="credentials">Credentials to secure the channel.</param>
         /// <param name="options">Channel options.</param>
-        public Channel(string host, int port, Credentials credentials, IEnumerable<ChannelOption> options = null) :
+        public Channel(string host, int port, ChannelCredentials credentials, IEnumerable<ChannelOption> options = null) :
             this(string.Format("{0}:{1}", host, port), credentials, options)
         {
         }

src/csharp/Grpc.Core/ChannelCredentials.cs

@@ -0,0 +1,238 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+using Grpc.Core.Internal;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core
+{
+    /// <summary>
+    /// Client-side channel credentials. Used for creation of a secure channel.
+    /// </summary>
+    public abstract class ChannelCredentials
+    {
+        static readonly ChannelCredentials InsecureInstance = new InsecureCredentialsImpl();
+
+        /// <summary>
+        /// Returns instance of credentials that provides no security and 
+        /// will result in creating an unsecure channel with no encryption whatsoever.
+        /// </summary>
+        public static ChannelCredentials Insecure
+        {
+            get
+            {
+                return InsecureInstance;
+            }
+        }
+
+        /// <summary>
+        /// Creates a new instance of <c>ChannelCredentials</c> class by composing
+        /// given channel credentials with call credentials.
+        /// </summary>
+        /// <param name="channelCredentials">Channel credentials.</param>
+        /// <param name="callCredentials">Call credentials.</param>
+        /// <returns>The new composite <c>ChannelCredentials</c></returns>
+        public static ChannelCredentials Create(ChannelCredentials channelCredentials, CallCredentials callCredentials)
+        {
+            return new CompositeChannelCredentials(channelCredentials, callCredentials);
+        }
+
+        /// <summary>
+        /// Creates a new instance of <c>ChannelCredentials</c> by wrapping
+        /// an instance of <c>CallCredentials</c>.
+        /// </summary>
+        /// <param name="callCredentials">Call credentials.</param>
+        /// <returns>The <c>ChannelCredentials</c> wrapping given call credentials.</returns>
+        public static ChannelCredentials Create(CallCredentials callCredentials)
+        {
+            return new WrappedCallCredentials(callCredentials);
+        }
+
+        /// <summary>
+        /// Creates native object for the credentials. May return null if insecure channel
+        /// should be created.
+        /// </summary>
+        /// <returns>The native credentials.</returns>
+        internal abstract CredentialsSafeHandle ToNativeCredentials();
+
+        /// <summary>
+        /// Returns <c>true</c> if this credential type allows being composed by <c>CompositeCredentials</c>.
+        /// </summary>
+        internal virtual bool IsComposable
+        {
+            get { return false; }
+        }
+
+        private sealed class InsecureCredentialsImpl : ChannelCredentials
+        {
+            internal override CredentialsSafeHandle ToNativeCredentials()
+            {
+                return null;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Client-side SSL credentials.
+    /// </summary>
+    public sealed class SslCredentials : ChannelCredentials
+    {
+        readonly string rootCertificates;
+        readonly KeyCertificatePair keyCertificatePair;
+
+        /// <summary>
+        /// Creates client-side SSL credentials loaded from
+        /// disk file pointed to by the GRPC_DEFAULT_SSL_ROOTS_FILE_PATH environment variable.
+        /// If that fails, gets the roots certificates from a well known place on disk.
+        /// </summary>
+        public SslCredentials() : this(null, null)
+        {
+        }
+
+        /// <summary>
+        /// Creates client-side SSL credentials from
+        /// a string containing PEM encoded root certificates.
+        /// </summary>
+        public SslCredentials(string rootCertificates) : this(rootCertificates, null)
+        {
+        }
+            
+        /// <summary>
+        /// Creates client-side SSL credentials.
+        /// </summary>
+        /// <param name="rootCertificates">string containing PEM encoded server root certificates.</param>
+        /// <param name="keyCertificatePair">a key certificate pair.</param>
+        public SslCredentials(string rootCertificates, KeyCertificatePair keyCertificatePair)
+        {
+            this.rootCertificates = rootCertificates;
+            this.keyCertificatePair = keyCertificatePair;
+        }
+
+        /// <summary>
+        /// PEM encoding of the server root certificates.
+        /// </summary>
+        public string RootCertificates
+        {
+            get
+            {
+                return this.rootCertificates;
+            }
+        }
+
+        /// <summary>
+        /// Client side key and certificate pair.
+        /// If null, client will not use key and certificate pair.
+        /// </summary>
+        public KeyCertificatePair KeyCertificatePair
+        {
+            get
+            {
+                return this.keyCertificatePair;
+            }
+        }
+
+        // Composing composite makes no sense.
+        internal override bool IsComposable
+        {
+            get { return true; }
+        }
+
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            return CredentialsSafeHandle.CreateSslCredentials(rootCertificates, keyCertificatePair);
+        }
+    }
+
+    /// <summary>
+    /// Credentials that allow composing one <see cref="ChannelCredentials"/> object and 
+    /// one or more <see cref="CallCredentials"/> objects into a single <see cref="ChannelCredentials"/>.
+    /// </summary>
+    internal sealed class CompositeChannelCredentials : ChannelCredentials
+    {
+        readonly ChannelCredentials channelCredentials;
+        readonly CallCredentials callCredentials;
+
+        /// <summary>
+        /// Initializes a new instance of <c>CompositeChannelCredentials</c> class.
+        /// The resulting credentials object will be composite of all the credentials specified as parameters.
+        /// </summary>
+        /// <param name="channelCredentials">channelCredentials to compose</param>
+        /// <param name="callCredentials">channelCredentials to compose</param>
+        public CompositeChannelCredentials(ChannelCredentials channelCredentials, CallCredentials callCredentials)
+        {
+            this.channelCredentials = Preconditions.CheckNotNull(channelCredentials);
+            this.callCredentials = Preconditions.CheckNotNull(callCredentials);
+            Preconditions.CheckArgument(channelCredentials.IsComposable, "Supplied channel credentials do not allow composition.");
+        }
+
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            using (var cred1 = channelCredentials.ToNativeCredentials())
+            using (var cred2 = callCredentials.ToNativeCredentials())
+            {
+                var nativeComposite = CredentialsSafeHandle.CreateComposite(cred1, cred2);
+                if (nativeComposite.IsInvalid)
+                {
+                    throw new ArgumentException("Error creating native composite credentials. Likely, this is because you are trying to compose incompatible credentials.");
+                }
+                return nativeComposite;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Credentials wrapping <see cref="CallCredentials"/> as <see cref="ChannelCredentials"/>.
+    /// </summary>
+    internal sealed class WrappedCallCredentials : ChannelCredentials
+    {
+        readonly CallCredentials callCredentials;
+
+        /// <summary>
+        /// Wraps instance of <c>CallCredentials</c> as <c>ChannelCredentials</c>.
+        /// </summary>
+        /// <param name="callCredentials">credentials to wrap</param>
+        public WrappedCallCredentials(CallCredentials callCredentials)
+        {
+            this.callCredentials = Preconditions.CheckNotNull(callCredentials);
+        }
+
+        internal override CredentialsSafeHandle ToNativeCredentials()
+        {
+            return callCredentials.ToNativeCredentials();
+        }
+    }
+}

src/csharp/Grpc.Core/ClientBase.cs

@@ -40,18 +40,17 @@ namespace Grpc.Core
     /// <summary>
     /// Interceptor for call headers.
     /// </summary>
-    public delegate void HeaderInterceptor(IMethod method, string authUri, Metadata metadata);
+    /// <remarks>Header interceptor is no longer to recommented way to perform authentication.
+    /// For header (initial metadata) based auth such as OAuth2 or JWT access token, use <see cref="MetadataCredentials"/>.
+    /// </remarks>
+    public delegate void HeaderInterceptor(IMethod method, Metadata metadata);
 
     /// <summary>
     /// Base class for client-side stubs.
     /// </summary>
     public abstract class ClientBase
     {
-        // Regex for removal of the optional DNS scheme, trailing port, and trailing backslash
-        static readonly Regex ChannelTargetPattern = new Regex(@"^(dns:\/{3})?([^:\/]+)(:\d+)?\/?$");
-
         readonly Channel channel;
-        readonly string authUriBase;
 
         /// <summary>
         /// Initializes a new instance of <c>ClientBase</c> class.
@@ -60,13 +59,14 @@ namespace Grpc.Core
         public ClientBase(Channel channel)
         {
             this.channel = channel;
-            this.authUriBase = GetAuthUriBase(channel.Target);
         }
 
         /// <summary>
-        /// Can be used to register a custom header (request metadata) interceptor.
+        /// Can be used to register a custom header interceptor.
         /// The interceptor is invoked each time a new call on this client is started.
+        /// It is not recommented to use header interceptor to add auth headers to RPC calls.
         /// </summary>
+        /// <seealso cref="HeaderInterceptor"/>
         public HeaderInterceptor HeaderInterceptor
         {
             get;
@@ -115,24 +115,9 @@ namespace Grpc.Core
                 {
                     options = options.WithHeaders(new Metadata());
                 }
-                var authUri = authUriBase != null ? authUriBase + method.ServiceName : null;
-                interceptor(method, authUri, options.Headers);
+                interceptor(method, options.Headers);
             }
             return new CallInvocationDetails<TRequest, TResponse>(channel, method, Host, options);
         }
-
-        /// <summary>
-        /// Creates Auth URI base from channel's target (the one passed at channel creation).
-        /// Fully-qualified service name is to be appended to this.
-        /// </summary>
-        internal static string GetAuthUriBase(string target)
-        {
-            var match = ChannelTargetPattern.Match(target);
-            if (!match.Success)
-            {
-                return null;
-            }
-            return "https://" + match.Groups[2].Value + "/";
-        }
     }
 }

src/csharp/Grpc.Core/Credentials.cs

@@ -1,138 +0,0 @@
-#region Copyright notice and license
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#endregion
-
-using System;
-using Grpc.Core.Internal;
-
-namespace Grpc.Core
-{
-    /// <summary>
-    /// Client-side credentials. Used for creation of a secure channel.
-    /// </summary>
-    public abstract class Credentials
-    {
-        static readonly Credentials InsecureInstance = new InsecureCredentialsImpl();
-
-        /// <summary>
-        /// Returns instance of credential that provides no security and 
-        /// will result in creating an unsecure channel with no encryption whatsoever.
-        /// </summary>
-        public static Credentials Insecure
-        {
-            get
-            {
-                return InsecureInstance;
-            }
-        }
-
-        /// <summary>
-        /// Creates native object for the credentials. May return null if insecure channel
-        /// should be created.
-        /// </summary>
-        /// <returns>The native credentials.</returns>
-        internal abstract CredentialsSafeHandle ToNativeCredentials();
-
-        private sealed class InsecureCredentialsImpl : Credentials
-        {
-            internal override CredentialsSafeHandle ToNativeCredentials()
-            {
-                return null;
-            }
-        }
-    }
-
-    /// <summary>
-    /// Client-side SSL credentials.
-    /// </summary>
-    public sealed class SslCredentials : Credentials
-    {
-        readonly string rootCertificates;
-        readonly KeyCertificatePair keyCertificatePair;
-
-        /// <summary>
-        /// Creates client-side SSL credentials loaded from
-        /// disk file pointed to by the GRPC_DEFAULT_SSL_ROOTS_FILE_PATH environment variable.
-        /// If that fails, gets the roots certificates from a well known place on disk.
-        /// </summary>
-        public SslCredentials() : this(null, null)
-        {
-        }
-
-        /// <summary>
-        /// Creates client-side SSL credentials from
-        /// a string containing PEM encoded root certificates.
-        /// </summary>
-        public SslCredentials(string rootCertificates) : this(rootCertificates, null)
-        {
-        }
-            
-        /// <summary>
-        /// Creates client-side SSL credentials.
-        /// </summary>
-        /// <param name="rootCertificates">string containing PEM encoded server root certificates.</param>
-        /// <param name="keyCertificatePair">a key certificate pair.</param>
-        public SslCredentials(string rootCertificates, KeyCertificatePair keyCertificatePair)
-        {
-            this.rootCertificates = rootCertificates;
-            this.keyCertificatePair = keyCertificatePair;
-        }
-
-        /// <summary>
-        /// PEM encoding of the server root certificates.
-        /// </summary>
-        public string RootCertificates
-        {
-            get
-            {
-                return this.rootCertificates;
-            }
-        }
-
-        /// <summary>
-        /// Client side key and certificate pair.
-        /// If null, client will not use key and certificate pair.
-        /// </summary>
-        public KeyCertificatePair KeyCertificatePair
-        {
-            get
-            {
-                return this.keyCertificatePair;
-            }
-        }
-
-        internal override CredentialsSafeHandle ToNativeCredentials()
-        {
-            return CredentialsSafeHandle.CreateSslCredentials(rootCertificates, keyCertificatePair);
-        }
-    }
-}

src/csharp/Grpc.Core/Grpc.Core.csproj

@@ -48,7 +48,9 @@
   <ItemGroup>
     <Compile Include="AsyncDuplexStreamingCall.cs" />
     <Compile Include="AsyncServerStreamingCall.cs" />
+    <Compile Include="CallCredentials.cs" />
     <Compile Include="IClientStreamWriter.cs" />
+    <Compile Include="Internal\NativeMetadataCredentialsPlugin.cs" />
     <Compile Include="Internal\INativeCall.cs" />
     <Compile Include="IServerStreamWriter.cs" />
     <Compile Include="IAsyncStreamWriter.cs" />
@@ -79,7 +81,7 @@
     <Compile Include="Utils\AsyncStreamExtensions.cs" />
     <Compile Include="Utils\BenchmarkUtil.cs" />
     <Compile Include="Internal\CredentialsSafeHandle.cs" />
-    <Compile Include="Credentials.cs" />
+    <Compile Include="ChannelCredentials.cs" />
     <Compile Include="Internal\ChannelArgsSafeHandle.cs" />
     <Compile Include="Internal\AsyncCompletion.cs" />
     <Compile Include="Internal\AsyncCallBase.cs" />

src/csharp/Grpc.Core/Grpc.Core.nuspec

@@ -16,7 +16,7 @@
     <tags>gRPC RPC Protocol HTTP/2</tags>
     <dependencies>
       <dependency id="Ix-Async" version="1.2.3" />
-      <dependency id="grpc.native.csharp_ext" version="$GrpcNativeCsharpExtVersion$" />
+      <dependency id="grpc.native.csharp" version="$GrpcNativeCsharpVersion$" />
     </dependencies>
   </metadata>
   <files>

src/csharp/Grpc.Core/Internal/AsyncCall.cs

@@ -344,9 +344,13 @@ namespace Grpc.Core.Internal
 
             var parentCall = details.Options.PropagationToken != null ? details.Options.PropagationToken.ParentCall : CallSafeHandle.NullInstance;
 
-            return details.Channel.Handle.CreateCall(environment.CompletionRegistry,
-                parentCall, ContextPropagationToken.DefaultMask, cq,
-                details.Method, details.Host, Timespec.FromDateTime(details.Options.Deadline.Value));
+            var credentials = details.Options.Credentials;
+            using (var nativeCredentials = credentials != null ? credentials.ToNativeCredentials() : null)
+            {
+                return details.Channel.Handle.CreateCall(environment.CompletionRegistry,
+                    parentCall, ContextPropagationToken.DefaultMask, cq,
+                    details.Method, details.Host, Timespec.FromDateTime(details.Options.Deadline.Value), nativeCredentials);
+            }
         }
 
         // Make sure that once cancellationToken for this call is cancelled, Cancel() will be called.

src/csharp/Grpc.Core/Internal/CallSafeHandle.cs

@@ -98,6 +98,9 @@ namespace Grpc.Core.Internal
         static extern GRPCCallError grpcsharp_call_send_initial_metadata(CallSafeHandle call,
             BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
 
+        [DllImport("grpc_csharp_ext.dll")]
+        static extern GRPCCallError grpcsharp_call_set_credentials(CallSafeHandle call, CredentialsSafeHandle credentials);
+
         [DllImport("grpc_csharp_ext.dll")]
         static extern CStringSafeHandle grpcsharp_call_get_peer(CallSafeHandle call);
 
@@ -113,6 +116,11 @@ namespace Grpc.Core.Internal
             this.completionRegistry = completionRegistry;
         }
 
+        public void SetCredentials(CredentialsSafeHandle credentials)
+        {
+            grpcsharp_call_set_credentials(this, credentials).CheckOk();
+        }
+
         public void StartUnary(UnaryResponseClientHandler callback, byte[] payload, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags)
         {
             var ctx = BatchContextSafeHandle.Create();

src/csharp/Grpc.Core/Internal/ChannelSafeHandle.cs

@@ -82,9 +82,13 @@ namespace Grpc.Core.Internal
             return grpcsharp_secure_channel_create(credentials, target, channelArgs);
         }
 
-        public CallSafeHandle CreateCall(CompletionRegistry registry, CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline)
+        public CallSafeHandle CreateCall(CompletionRegistry registry, CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline, CredentialsSafeHandle credentials)
         {
             var result = grpcsharp_channel_create_call(this, parentCall, propagationMask, cq, method, host, deadline);
+            if (credentials != null)
+            {
+                result.SetCredentials(credentials);
+            }
             result.SetCompletionRegistry(registry);
             return result;
         }

src/csharp/Grpc.Core/Internal/CredentialsSafeHandle.cs

@@ -43,6 +43,9 @@ namespace Grpc.Core.Internal
         [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
         static extern CredentialsSafeHandle grpcsharp_ssl_credentials_create(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
 
+        [DllImport("grpc_csharp_ext.dll")]
+        static extern CredentialsSafeHandle grpcsharp_composite_credentials_create(CredentialsSafeHandle creds1, CredentialsSafeHandle creds2);
+
         [DllImport("grpc_csharp_ext.dll")]
         static extern void grpcsharp_credentials_release(IntPtr credentials);
 
@@ -69,6 +72,11 @@ namespace Grpc.Core.Internal
             }
         }
 
+        public static CredentialsSafeHandle CreateComposite(CredentialsSafeHandle creds1, CredentialsSafeHandle creds2)
+        {
+            return grpcsharp_composite_credentials_create(creds1, creds2);
+        }
+
         protected override bool ReleaseHandle()
         {
             grpcsharp_credentials_release(handle);

src/csharp/Grpc.Core/Internal/NativeMetadataCredentialsPlugin.cs

@@ -0,0 +1,113 @@
+#region Copyright notice and license
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+using System.Threading.Tasks;
+
+using Grpc.Core.Logging;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core.Internal
+{
+    internal delegate void NativeMetadataInterceptor(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy);
+
+    internal class NativeMetadataCredentialsPlugin
+    {
+        const string GetMetadataExceptionMsg = "Exception occured in metadata credentials plugin.";
+        static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<NativeMetadataCredentialsPlugin>();
+
+        [DllImport("grpc_csharp_ext.dll")]
+        static extern CredentialsSafeHandle grpcsharp_metadata_credentials_create_from_plugin(NativeMetadataInterceptor interceptor);
+        
+        [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+        static extern void grpcsharp_metadata_credentials_notify_from_plugin(IntPtr callbackPtr, IntPtr userData, MetadataArraySafeHandle metadataArray, StatusCode statusCode, string errorDetails);
+
+        AsyncAuthInterceptor interceptor;
+        GCHandle gcHandle;
+        NativeMetadataInterceptor nativeInterceptor;
+        CredentialsSafeHandle credentials;
+
+        public NativeMetadataCredentialsPlugin(AsyncAuthInterceptor interceptor)
+        {
+            this.interceptor = Preconditions.CheckNotNull(interceptor, "interceptor");
+            this.nativeInterceptor = NativeMetadataInterceptorHandler;
+
+            // Make sure the callback doesn't get garbage collected until it is destroyed.
+            this.gcHandle = GCHandle.Alloc(this.nativeInterceptor, GCHandleType.Normal);
+            this.credentials = grpcsharp_metadata_credentials_create_from_plugin(nativeInterceptor);
+        }
+
+        public CredentialsSafeHandle Credentials
+        {
+            get { return credentials; }
+        }
+
+        private void NativeMetadataInterceptorHandler(IntPtr statePtr, IntPtr serviceUrlPtr, IntPtr callbackPtr, IntPtr userDataPtr, bool isDestroy)
+        {
+            if (isDestroy)
+            {
+                gcHandle.Free();
+                return;
+            }
+
+            try
+            {
+                string serviceUrl = Marshal.PtrToStringAnsi(serviceUrlPtr);
+                StartGetMetadata(serviceUrl, callbackPtr, userDataPtr);
+            }
+            catch (Exception e)
+            {
+                grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, MetadataArraySafeHandle.Create(Metadata.Empty), StatusCode.Unknown, GetMetadataExceptionMsg);
+                Logger.Error(e, GetMetadataExceptionMsg);
+            }
+        }
+
+        private async void StartGetMetadata(string serviceUrl, IntPtr callbackPtr, IntPtr userDataPtr)
+        {
+            try
+            {
+                var metadata = new Metadata();
+                await interceptor(serviceUrl, metadata);
+
+                using (var metadataArray = MetadataArraySafeHandle.Create(metadata))
+                {
+                    grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, metadataArray, StatusCode.OK, null);
+                }
+            }
+            catch (Exception e)
+            {
+                grpcsharp_metadata_credentials_notify_from_plugin(callbackPtr, userDataPtr, MetadataArraySafeHandle.Create(Metadata.Empty), StatusCode.Unknown, GetMetadataExceptionMsg);
+                Logger.Error(e, GetMetadataExceptionMsg);
+            }
+        }
+    }
+}

src/csharp/Grpc.Examples.MathClient/MathClient.cs

@@ -39,7 +39,7 @@ namespace Math
     {
         public static void Main(string[] args)
         {
-            var channel = new Channel("127.0.0.1", 23456, Credentials.Insecure);
+            var channel = new Channel("127.0.0.1", 23456, ChannelCredentials.Insecure);
             Math.IMathClient client = new Math.MathClient(channel);
             MathExamples.DivExample(client);
 

src/csharp/Grpc.Examples.Tests/MathClientServerTests.cs

@@ -61,7 +61,7 @@ namespace Math.Tests
                 Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
             };
             server.Start();
-            channel = new Channel(Host, server.Ports.Single().BoundPort, Credentials.Insecure);
+            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
             client = Math.NewClient(channel);
         }
 

src/csharp/Grpc.HealthCheck.Tests/HealthClientServerTest.cs

@@ -63,7 +63,7 @@ namespace Grpc.HealthCheck.Tests
                 Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
             };
             server.Start();
-            channel = new Channel(Host, server.Ports.Single().BoundPort, Credentials.Insecure);
+            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
 
             client = Grpc.Health.V1Alpha.Health.NewClient(channel);
         }

src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj

@@ -9,6 +9,7 @@
     <AssemblyName>Grpc.IntegrationTesting.Client</AssemblyName>
     <StartupObject>Grpc.IntegrationTesting.Client.Program</StartupObject>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <NuGetPackageImportStamp>6d22e68f</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -38,7 +39,47 @@
     <AssemblyOriginatorKeyFile>C:\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth, Version=1.9.3.19379, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.9.3.19383, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Core, Version=1.9.3.19379, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Core.1.9.3\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions">
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.168.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Net" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.Extensions">
+      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.Primitives">
+      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -60,5 +101,13 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="packages.config" />
   </ItemGroup>
+  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
+  </Target>
 </Project>

src/csharp/Grpc.IntegrationTesting.Client/packages.config

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.9.3" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.9.3" targetFramework="net45" />
+  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
+  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
+  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
+  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+</packages>

src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj

@@ -9,6 +9,7 @@
     <AssemblyName>Grpc.IntegrationTesting.Server</AssemblyName>
     <StartupObject>Grpc.IntegrationTesting.Server.Program</StartupObject>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <NuGetPackageImportStamp>d9ee8e52</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -38,7 +39,47 @@
     <AssemblyOriginatorKeyFile>C:\keys\Grpc.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="BouncyCastle.Crypto, Version=1.7.4137.9688, Culture=neutral, PublicKeyToken=a4292a325f69b123, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\BouncyCastle.1.7.0\lib\Net40-Client\BouncyCastle.Crypto.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth, Version=1.9.3.19379, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Auth.PlatformServices, Version=1.9.3.19383, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Auth.1.9.3\lib\net40\Google.Apis.Auth.PlatformServices.dll</HintPath>
+    </Reference>
+    <Reference Include="Google.Apis.Core, Version=1.9.3.19379, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Google.Apis.Core.1.9.3\lib\portable-net40+sl50+win+wpa81+wp80\Google.Apis.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks, Version=1.0.12.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions">
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Threading.Tasks.Extensions.Desktop, Version=1.0.168.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Microsoft.Bcl.Async.1.0.168\lib\net40\Microsoft.Threading.Tasks.Extensions.Desktop.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json, Version=7.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\packages\Newtonsoft.Json.7.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
+    <Reference Include="System.Net" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Net.Http.Extensions">
+      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Extensions.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.Primitives">
+      <HintPath>..\packages\Microsoft.Net.Http.2.2.29\lib\net45\System.Net.Http.Primitives.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Net.Http.WebRequest" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\Grpc.Core\Version.cs">
@@ -60,5 +101,13 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
+    <None Include="packages.config" />
   </ItemGroup>
+  <Import Project="..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets" Condition="Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.Bcl.Build.1.0.21\build\Microsoft.Bcl.Build.targets'))" />
+  </Target>
 </Project>

src/csharp/Grpc.IntegrationTesting.Server/packages.config

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="BouncyCastle" version="1.7.0" targetFramework="net45" />
+  <package id="Google.Apis.Auth" version="1.9.3" targetFramework="net45" />
+  <package id="Google.Apis.Core" version="1.9.3" targetFramework="net45" />
+  <package id="Microsoft.Bcl" version="1.1.10" targetFramework="net45" />
+  <package id="Microsoft.Bcl.Async" version="1.0.168" targetFramework="net45" />
+  <package id="Microsoft.Bcl.Build" version="1.0.21" targetFramework="net45" />
+  <package id="Microsoft.Net.Http" version="2.2.29" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />
+</packages>

src/csharp/Grpc.IntegrationTesting/Empty.cs

@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: empty.proto
+// source: test/proto/empty.proto
 #pragma warning disable 1591, 0612, 3021
 #region Designer generated code
 
@@ -23,7 +23,8 @@ namespace Grpc.Testing {
       static Empty() {
         byte[] descriptorData = global::System.Convert.FromBase64String(
             string.Concat(
-              "CgtlbXB0eS5wcm90bxIMZ3JwYy50ZXN0aW5nIgcKBUVtcHR5YgZwcm90bzM="));
+              "ChZ0ZXN0L3Byb3RvL2VtcHR5LnByb3RvEgxncnBjLnRlc3RpbmciBwoFRW1w", 
+              "dHliBnByb3RvMw=="));
         descriptor = pbr::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
             new pbr::FileDescriptor[] { },
             new pbr::GeneratedCodeInfo(null, new pbr::GeneratedCodeInfo[] {

src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj

@@ -96,6 +96,7 @@
     <Compile Include="Empty.cs" />
     <Compile Include="Messages.cs" />
     <Compile Include="InteropClientServerTest.cs" />
+    <Compile Include="MetadataCredentialsTest.cs" />
     <Compile Include="TestServiceImpl.cs" />
     <Compile Include="InteropServer.cs" />
     <Compile Include="InteropClient.cs" />
@@ -118,9 +119,6 @@
   <ItemGroup>
     <None Include="app.config" />
     <None Include="packages.config" />
-    <None Include="proto\test.proto" />
-    <None Include="proto\empty.proto" />
-    <None Include="proto\messages.proto" />
     <None Include="data\README">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>

src/csharp/Grpc.IntegrationTesting/InteropClient.cs

@@ -33,20 +33,21 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 
 using CommandLine;
+using CommandLine.Text;
 using Google.Apis.Auth.OAuth2;
 using Google.Protobuf;
 using Grpc.Auth;
 using Grpc.Core;
 using Grpc.Core.Utils;
 using Grpc.Testing;
+using Newtonsoft.Json.Linq;
 using NUnit.Framework;
-using CommandLine.Text;
-using System.IO;
 
 namespace Grpc.IntegrationTesting
 {
@@ -66,11 +67,13 @@ namespace Grpc.IntegrationTesting
             [Option("test_case", DefaultValue = "large_unary")]
             public string TestCase { get; set; }
 
-            [Option("use_tls")]
-            public bool UseTls { get; set; }
+            // Deliberately using nullable bool type to allow --use_tls=true syntax (as opposed to --use_tls)
+            [Option("use_tls", DefaultValue = false)]
+            public bool? UseTls { get; set; }
 
-            [Option("use_test_ca")]
-            public bool UseTestCa { get; set; }
+            // Deliberately using nullable bool type to allow --use_test_ca=true syntax (as opposed to --use_test_ca)
+            [Option("use_test_ca", DefaultValue = false)]
+            public bool? UseTestCa { get; set; }
 
             [Option("default_service_account", Required = false)]
             public string DefaultServiceAccount { get; set; }
@@ -116,7 +119,7 @@ namespace Grpc.IntegrationTesting
 
         private async Task Run()
         {
-            var credentials = options.UseTls ? TestCredentials.CreateTestClientCredentials(options.UseTestCa) : Credentials.Insecure;
+            var credentials = await CreateCredentialsAsync();
             
             List<ChannelOption> channelOptions = null;
             if (!string.IsNullOrEmpty(options.ServerHostOverride))
@@ -132,6 +135,26 @@ namespace Grpc.IntegrationTesting
             await channel.ShutdownAsync();
         }
 
+        private async Task<ChannelCredentials> CreateCredentialsAsync()
+        {
+            var credentials = options.UseTls.Value ? TestCredentials.CreateTestClientCredentials(options.UseTestCa.Value) : ChannelCredentials.Insecure;
+
+            if (options.TestCase == "jwt_token_creds")
+            {
+                var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
+                Assert.IsTrue(googleCredential.IsCreateScopedRequired);
+                credentials = ChannelCredentials.Create(credentials, googleCredential.ToGrpcCredentials());
+            }
+
+            if (options.TestCase == "compute_engine_creds")
+            {
+                var googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
+                Assert.IsFalse(googleCredential.IsCreateScopedRequired);
+                credentials = ChannelCredentials.Create(credentials, googleCredential.ToGrpcCredentials());
+            }
+            return credentials;
+        }
+
         private async Task RunTestCaseAsync(TestService.TestServiceClient client, ClientOptions options)
         {
             switch (options.TestCase)
@@ -155,16 +178,16 @@ namespace Grpc.IntegrationTesting
                     await RunEmptyStreamAsync(client);
                     break;
                 case "compute_engine_creds":
-                    await RunComputeEngineCredsAsync(client, options.DefaultServiceAccount, options.OAuthScope);
+                    RunComputeEngineCreds(client, options.DefaultServiceAccount, options.OAuthScope);
                     break;
                 case "jwt_token_creds":
-                    await RunJwtTokenCredsAsync(client, options.DefaultServiceAccount);
+                    RunJwtTokenCreds(client);
                     break;
                 case "oauth2_auth_token":
-                    await RunOAuth2AuthTokenAsync(client, options.DefaultServiceAccount, options.OAuthScope);
+                    await RunOAuth2AuthTokenAsync(client, options.OAuthScope);
                     break;
                 case "per_rpc_creds":
-                    await RunPerRpcCredsAsync(client, options.DefaultServiceAccount, options.OAuthScope);
+                    await RunPerRpcCredsAsync(client, options.OAuthScope);
                     break;
                 case "cancel_after_begin":
                     await RunCancelAfterBeginAsync(client);
@@ -318,13 +341,10 @@ namespace Grpc.IntegrationTesting
             Console.WriteLine("Passed!");
         }
 
-        public static async Task RunComputeEngineCredsAsync(TestService.TestServiceClient client, string defaultServiceAccount, string oauthScope)
+        public static void RunComputeEngineCreds(TestService.TestServiceClient client, string defaultServiceAccount, string oauthScope)
         {
             Console.WriteLine("running compute_engine_creds");
-            var credential = await GoogleCredential.GetApplicationDefaultAsync();
-            Assert.IsFalse(credential.IsCreateScopedRequired);
-            client.HeaderInterceptor = AuthInterceptors.FromCredential(credential);
-            
+
             var request = new SimpleRequest
             {
                 ResponseType = PayloadType.COMPRESSABLE,
@@ -334,6 +354,7 @@ namespace Grpc.IntegrationTesting
                 FillOauthScope = true
             };
 
+            // not setting credentials here because they were set on channel already
             var response = client.UnaryCall(request);
 
             Assert.AreEqual(PayloadType.COMPRESSABLE, response.Payload.Type);
@@ -344,13 +365,10 @@ namespace Grpc.IntegrationTesting
             Console.WriteLine("Passed!");
         }
 
-        public static async Task RunJwtTokenCredsAsync(TestService.TestServiceClient client, string defaultServiceAccount)
+        public static void RunJwtTokenCreds(TestService.TestServiceClient client)
         {
             Console.WriteLine("running jwt_token_creds");
-            var credential = await GoogleCredential.GetApplicationDefaultAsync();
-            Assert.IsTrue(credential.IsCreateScopedRequired);
-            client.HeaderInterceptor = AuthInterceptors.FromCredential(credential);
-
+           
             var request = new SimpleRequest
             {
                 ResponseType = PayloadType.COMPRESSABLE,
@@ -359,53 +377,50 @@ namespace Grpc.IntegrationTesting
                 FillUsername = true,
             };
 
+            // not setting credentials here because they were set on channel already
             var response = client.UnaryCall(request);
 
             Assert.AreEqual(PayloadType.COMPRESSABLE, response.Payload.Type);
             Assert.AreEqual(314159, response.Payload.Body.Length);
-            Assert.AreEqual(defaultServiceAccount, response.Username);
+            Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
         }
 
-        public static async Task RunOAuth2AuthTokenAsync(TestService.TestServiceClient client, string defaultServiceAccount, string oauthScope)
+        public static async Task RunOAuth2AuthTokenAsync(TestService.TestServiceClient client, string oauthScope)
         {
             Console.WriteLine("running oauth2_auth_token");
             ITokenAccess credential = (await GoogleCredential.GetApplicationDefaultAsync()).CreateScoped(new[] { oauthScope });
             string oauth2Token = await credential.GetAccessTokenForRequestAsync();
 
-            client.HeaderInterceptor = AuthInterceptors.FromAccessToken(oauth2Token);
-
+            var credentials = GrpcCredentials.FromAccessToken(oauth2Token);
             var request = new SimpleRequest
             {
                 FillUsername = true,
                 FillOauthScope = true
             };
 
-            var response = client.UnaryCall(request);
+            var response = client.UnaryCall(request, new CallOptions(credentials: credentials));
 
             Assert.False(string.IsNullOrEmpty(response.OauthScope));
             Assert.True(oauthScope.Contains(response.OauthScope));
-            Assert.AreEqual(defaultServiceAccount, response.Username);
+            Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
         }
 
-        public static async Task RunPerRpcCredsAsync(TestService.TestServiceClient client, string defaultServiceAccount, string oauthScope)
+        public static async Task RunPerRpcCredsAsync(TestService.TestServiceClient client, string oauthScope)
         {
             Console.WriteLine("running per_rpc_creds");
-            ITokenAccess credential = (await GoogleCredential.GetApplicationDefaultAsync()).CreateScoped(new[] { oauthScope });
-            string accessToken = await credential.GetAccessTokenForRequestAsync();
-            var headerInterceptor = AuthInterceptors.FromAccessToken(accessToken);
+            ITokenAccess googleCredential = await GoogleCredential.GetApplicationDefaultAsync();
 
+            var credentials = GrpcCredentials.Create(googleCredential);
             var request = new SimpleRequest
             {
                 FillUsername = true,
             };
 
-            var headers = new Metadata();
-            headerInterceptor(null, "", headers);
-            var response = client.UnaryCall(request, headers: headers);
+            var response = client.UnaryCall(request, new CallOptions(credentials: credentials));
 
-            Assert.AreEqual(defaultServiceAccount, response.Username);
+            Assert.AreEqual(GetEmailFromServiceAccountFile(), response.Username);
             Console.WriteLine("Passed!");
         }
 
@@ -485,5 +500,17 @@ namespace Grpc.IntegrationTesting
         {
             return new Payload { Body = ByteString.CopyFrom(new byte[size]) };
         }
+
+        // extracts the client_email field from service account file used for auth test cases
+        private static string GetEmailFromServiceAccountFile()
+        {
+            string keyFile = Environment.GetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS");
+            Assert.IsNotNull(keyFile);
+
+            var jobject = JObject.Parse(File.ReadAllText(keyFile));
+            string email = jobject.GetValue("client_email").Value<string>();
+            Assert.IsTrue(email.Length > 0);  // spec requires nonempty client email.
+            return email;
+        }
     }
 }

src/csharp/Grpc.IntegrationTesting/InteropServer.cs

@@ -54,8 +54,9 @@ namespace Grpc.IntegrationTesting
             [Option("port", DefaultValue = 8070)]
             public int Port { get; set; }
 
-            [Option("use_tls")]
-            public bool UseTls { get; set; }
+            // Deliberately using nullable bool type to allow --use_tls=true syntax (as opposed to --use_tls)
+            [Option("use_tls", DefaultValue = false)]
+            public bool? UseTls { get; set; }
 
             [HelpOption]
             public string GetUsage()
@@ -99,7 +100,7 @@ namespace Grpc.IntegrationTesting
 
             string host = "0.0.0.0";
             int port = options.Port;
-            if (options.UseTls)
+            if (options.UseTls.Value)
             {
                 server.Ports.Add(host, port, TestCredentials.CreateTestServerCredentials());
             }

src/csharp/Grpc.IntegrationTesting/Messages.cs

@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: messages.proto
+// source: test/proto/messages.proto
 #pragma warning disable 1591, 0612, 3021
 #region Designer generated code
 
@@ -21,37 +21,48 @@ namespace Grpc.Testing {
     static Messages() {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
-            "Cg5tZXNzYWdlcy5wcm90bxIMZ3JwYy50ZXN0aW5nIkAKB1BheWxvYWQSJwoE", 
-            "dHlwZRgBIAEoDjIZLmdycGMudGVzdGluZy5QYXlsb2FkVHlwZRIMCgRib2R5", 
-            "GAIgASgMIrEBCg1TaW1wbGVSZXF1ZXN0EjAKDXJlc3BvbnNlX3R5cGUYASAB", 
-            "KA4yGS5ncnBjLnRlc3RpbmcuUGF5bG9hZFR5cGUSFQoNcmVzcG9uc2Vfc2l6", 
-            "ZRgCIAEoBRImCgdwYXlsb2FkGAMgASgLMhUuZ3JwYy50ZXN0aW5nLlBheWxv", 
-            "YWQSFQoNZmlsbF91c2VybmFtZRgEIAEoCBIYChBmaWxsX29hdXRoX3Njb3Bl", 
-            "GAUgASgIIl8KDlNpbXBsZVJlc3BvbnNlEiYKB3BheWxvYWQYASABKAsyFS5n", 
-            "cnBjLnRlc3RpbmcuUGF5bG9hZBIQCgh1c2VybmFtZRgCIAEoCRITCgtvYXV0", 
-            "aF9zY29wZRgDIAEoCSJDChlTdHJlYW1pbmdJbnB1dENhbGxSZXF1ZXN0EiYK", 
-            "B3BheWxvYWQYASABKAsyFS5ncnBjLnRlc3RpbmcuUGF5bG9hZCI9ChpTdHJl", 
-            "YW1pbmdJbnB1dENhbGxSZXNwb25zZRIfChdhZ2dyZWdhdGVkX3BheWxvYWRf", 
-            "c2l6ZRgBIAEoBSI3ChJSZXNwb25zZVBhcmFtZXRlcnMSDAoEc2l6ZRgBIAEo", 
-            "BRITCgtpbnRlcnZhbF91cxgCIAEoBSK1AQoaU3RyZWFtaW5nT3V0cHV0Q2Fs", 
-            "bFJlcXVlc3QSMAoNcmVzcG9uc2VfdHlwZRgBIAEoDjIZLmdycGMudGVzdGlu", 
-            "Zy5QYXlsb2FkVHlwZRI9ChNyZXNwb25zZV9wYXJhbWV0ZXJzGAIgAygLMiAu", 
-            "Z3JwYy50ZXN0aW5nLlJlc3BvbnNlUGFyYW1ldGVycxImCgdwYXlsb2FkGAMg", 
-            "ASgLMhUuZ3JwYy50ZXN0aW5nLlBheWxvYWQiRQobU3RyZWFtaW5nT3V0cHV0", 
-            "Q2FsbFJlc3BvbnNlEiYKB3BheWxvYWQYASABKAsyFS5ncnBjLnRlc3Rpbmcu", 
-            "UGF5bG9hZCo/CgtQYXlsb2FkVHlwZRIQCgxDT01QUkVTU0FCTEUQABISCg5V", 
-            "TkNPTVBSRVNTQUJMRRABEgoKBlJBTkRPTRACYgZwcm90bzM="));
+            "Chl0ZXN0L3Byb3RvL21lc3NhZ2VzLnByb3RvEgxncnBjLnRlc3RpbmciQAoH", 
+            "UGF5bG9hZBInCgR0eXBlGAEgASgOMhkuZ3JwYy50ZXN0aW5nLlBheWxvYWRU", 
+            "eXBlEgwKBGJvZHkYAiABKAwiKwoKRWNob1N0YXR1cxIMCgRjb2RlGAEgASgF", 
+            "Eg8KB21lc3NhZ2UYAiABKAkioQIKDVNpbXBsZVJlcXVlc3QSMAoNcmVzcG9u", 
+            "c2VfdHlwZRgBIAEoDjIZLmdycGMudGVzdGluZy5QYXlsb2FkVHlwZRIVCg1y", 
+            "ZXNwb25zZV9zaXplGAIgASgFEiYKB3BheWxvYWQYAyABKAsyFS5ncnBjLnRl", 
+            "c3RpbmcuUGF5bG9hZBIVCg1maWxsX3VzZXJuYW1lGAQgASgIEhgKEGZpbGxf", 
+            "b2F1dGhfc2NvcGUYBSABKAgSOwoUcmVzcG9uc2VfY29tcHJlc3Npb24YBiAB", 
+            "KA4yHS5ncnBjLnRlc3RpbmcuQ29tcHJlc3Npb25UeXBlEjEKD3Jlc3BvbnNl", 
+            "X3N0YXR1cxgHIAEoCzIYLmdycGMudGVzdGluZy5FY2hvU3RhdHVzIl8KDlNp", 
+            "bXBsZVJlc3BvbnNlEiYKB3BheWxvYWQYASABKAsyFS5ncnBjLnRlc3Rpbmcu", 
+            "UGF5bG9hZBIQCgh1c2VybmFtZRgCIAEoCRITCgtvYXV0aF9zY29wZRgDIAEo", 
+            "CSJDChlTdHJlYW1pbmdJbnB1dENhbGxSZXF1ZXN0EiYKB3BheWxvYWQYASAB", 
+            "KAsyFS5ncnBjLnRlc3RpbmcuUGF5bG9hZCI9ChpTdHJlYW1pbmdJbnB1dENh", 
+            "bGxSZXNwb25zZRIfChdhZ2dyZWdhdGVkX3BheWxvYWRfc2l6ZRgBIAEoBSI3", 
+            "ChJSZXNwb25zZVBhcmFtZXRlcnMSDAoEc2l6ZRgBIAEoBRITCgtpbnRlcnZh", 
+            "bF91cxgCIAEoBSKlAgoaU3RyZWFtaW5nT3V0cHV0Q2FsbFJlcXVlc3QSMAoN", 
+            "cmVzcG9uc2VfdHlwZRgBIAEoDjIZLmdycGMudGVzdGluZy5QYXlsb2FkVHlw", 
+            "ZRI9ChNyZXNwb25zZV9wYXJhbWV0ZXJzGAIgAygLMiAuZ3JwYy50ZXN0aW5n", 
+            "LlJlc3BvbnNlUGFyYW1ldGVycxImCgdwYXlsb2FkGAMgASgLMhUuZ3JwYy50", 
+            "ZXN0aW5nLlBheWxvYWQSOwoUcmVzcG9uc2VfY29tcHJlc3Npb24YBiABKA4y", 
+            "HS5ncnBjLnRlc3RpbmcuQ29tcHJlc3Npb25UeXBlEjEKD3Jlc3BvbnNlX3N0", 
+            "YXR1cxgHIAEoCzIYLmdycGMudGVzdGluZy5FY2hvU3RhdHVzIkUKG1N0cmVh", 
+            "bWluZ091dHB1dENhbGxSZXNwb25zZRImCgdwYXlsb2FkGAEgASgLMhUuZ3Jw", 
+            "Yy50ZXN0aW5nLlBheWxvYWQiMwoNUmVjb25uZWN0SW5mbxIOCgZwYXNzZWQY", 
+            "ASABKAgSEgoKYmFja29mZl9tcxgCIAMoBSo/CgtQYXlsb2FkVHlwZRIQCgxD", 
+            "T01QUkVTU0FCTEUQABISCg5VTkNPTVBSRVNTQUJMRRABEgoKBlJBTkRPTRAC", 
+            "KjIKD0NvbXByZXNzaW9uVHlwZRIICgROT05FEAASCAoER1pJUBABEgsKB0RF", 
+            "RkxBVEUQAmIGcHJvdG8z"));
       descriptor = pbr::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
           new pbr::FileDescriptor[] { },
-          new pbr::GeneratedCodeInfo(new[] {typeof(global::Grpc.Testing.PayloadType), }, new pbr::GeneratedCodeInfo[] {
+          new pbr::GeneratedCodeInfo(new[] {typeof(global::Grpc.Testing.PayloadType), typeof(global::Grpc.Testing.CompressionType), }, new pbr::GeneratedCodeInfo[] {
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.Payload), new[]{ "Type", "Body" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.SimpleRequest), new[]{ "ResponseType", "ResponseSize", "Payload", "FillUsername", "FillOauthScope" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.EchoStatus), new[]{ "Code", "Message" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.SimpleRequest), new[]{ "ResponseType", "ResponseSize", "Payload", "FillUsername", "FillOauthScope", "ResponseCompression", "ResponseStatus" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.SimpleResponse), new[]{ "Payload", "Username", "OauthScope" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingInputCallRequest), new[]{ "Payload" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingInputCallResponse), new[]{ "AggregatedPayloadSize" }, null, null, null),
             new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ResponseParameters), new[]{ "Size", "IntervalUs" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingOutputCallRequest), new[]{ "ResponseType", "ResponseParameters", "Payload" }, null, null, null),
-            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingOutputCallResponse), new[]{ "Payload" }, null, null, null)
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingOutputCallRequest), new[]{ "ResponseType", "ResponseParameters", "Payload", "ResponseCompression", "ResponseStatus" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.StreamingOutputCallResponse), new[]{ "Payload" }, null, null, null),
+            new pbr::GeneratedCodeInfo(typeof(global::Grpc.Testing.ReconnectInfo), new[]{ "Passed", "BackoffMs" }, null, null, null)
           }));
     }
     #endregion
@@ -64,6 +75,12 @@ namespace Grpc.Testing {
     RANDOM = 2,
   }
 
+  public enum CompressionType {
+    NONE = 0,
+    GZIP = 1,
+    DEFLATE = 2,
+  }
+
   #endregion
 
   #region Messages
@@ -195,13 +212,141 @@ namespace Grpc.Testing {
 
   }
 
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class EchoStatus : pb::IMessage<EchoStatus> {
+    private static readonly pb::MessageParser<EchoStatus> _parser = new pb::MessageParser<EchoStatus>(() => new EchoStatus());
+    public static pb::MessageParser<EchoStatus> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[1]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public EchoStatus() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public EchoStatus(EchoStatus other) : this() {
+      code_ = other.code_;
+      message_ = other.message_;
+    }
+
+    public EchoStatus Clone() {
+      return new EchoStatus(this);
+    }
+
+    public const int CodeFieldNumber = 1;
+    private int code_;
+    public int Code {
+      get { return code_; }
+      set {
+        code_ = value;
+      }
+    }
+
+    public const int MessageFieldNumber = 2;
+    private string message_ = "";
+    public string Message {
+      get { return message_; }
+      set {
+        message_ = pb::Preconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    public override bool Equals(object other) {
+      return Equals(other as EchoStatus);
+    }
+
+    public bool Equals(EchoStatus other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Code != other.Code) return false;
+      if (Message != other.Message) return false;
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Code != 0) hash ^= Code.GetHashCode();
+      if (Message.Length != 0) hash ^= Message.GetHashCode();
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.Default.Format(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Code != 0) {
+        output.WriteRawTag(8);
+        output.WriteInt32(Code);
+      }
+      if (Message.Length != 0) {
+        output.WriteRawTag(18);
+        output.WriteString(Message);
+      }
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      if (Code != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeInt32Size(Code);
+      }
+      if (Message.Length != 0) {
+        size += 1 + pb::CodedOutputStream.ComputeStringSize(Message);
+      }
+      return size;
+    }
+
+    public void MergeFrom(EchoStatus other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Code != 0) {
+        Code = other.Code;
+      }
+      if (other.Message.Length != 0) {
+        Message = other.Message;
+      }
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            Code = input.ReadInt32();
+            break;
+          }
+          case 18: {
+            Message = input.ReadString();
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
   [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
   public sealed partial class SimpleRequest : pb::IMessage<SimpleRequest> {
     private static readonly pb::MessageParser<SimpleRequest> _parser = new pb::MessageParser<SimpleRequest>(() => new SimpleRequest());
     public static pb::MessageParser<SimpleRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[1]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[2]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -220,6 +365,8 @@ namespace Grpc.Testing {
       Payload = other.payload_ != null ? other.Payload.Clone() : null;
       fillUsername_ = other.fillUsername_;
       fillOauthScope_ = other.fillOauthScope_;
+      responseCompression_ = other.responseCompression_;
+      ResponseStatus = other.responseStatus_ != null ? other.ResponseStatus.Clone() : null;
     }
 
     public SimpleRequest Clone() {
@@ -271,6 +418,24 @@ namespace Grpc.Testing {
       }
     }
 
+    public const int ResponseCompressionFieldNumber = 6;
+    private global::Grpc.Testing.CompressionType responseCompression_ = global::Grpc.Testing.CompressionType.NONE;
+    public global::Grpc.Testing.CompressionType ResponseCompression {
+      get { return responseCompression_; }
+      set {
+        responseCompression_ = value;
+      }
+    }
+
+    public const int ResponseStatusFieldNumber = 7;
+    private global::Grpc.Testing.EchoStatus responseStatus_;
+    public global::Grpc.Testing.EchoStatus ResponseStatus {
+      get { return responseStatus_; }
+      set {
+        responseStatus_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as SimpleRequest);
     }
@@ -287,6 +452,8 @@ namespace Grpc.Testing {
       if (!object.Equals(Payload, other.Payload)) return false;
       if (FillUsername != other.FillUsername) return false;
       if (FillOauthScope != other.FillOauthScope) return false;
+      if (ResponseCompression != other.ResponseCompression) return false;
+      if (!object.Equals(ResponseStatus, other.ResponseStatus)) return false;
       return true;
     }
 
@@ -297,6 +464,8 @@ namespace Grpc.Testing {
       if (payload_ != null) hash ^= Payload.GetHashCode();
       if (FillUsername != false) hash ^= FillUsername.GetHashCode();
       if (FillOauthScope != false) hash ^= FillOauthScope.GetHashCode();
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) hash ^= ResponseCompression.GetHashCode();
+      if (responseStatus_ != null) hash ^= ResponseStatus.GetHashCode();
       return hash;
     }
 
@@ -325,6 +494,14 @@ namespace Grpc.Testing {
         output.WriteRawTag(40);
         output.WriteBool(FillOauthScope);
       }
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        output.WriteRawTag(48);
+        output.WriteEnum((int) ResponseCompression);
+      }
+      if (responseStatus_ != null) {
+        output.WriteRawTag(58);
+        output.WriteMessage(ResponseStatus);
+      }
     }
 
     public int CalculateSize() {
@@ -344,6 +521,12 @@ namespace Grpc.Testing {
       if (FillOauthScope != false) {
         size += 1 + 1;
       }
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        size += 1 + pb::CodedOutputStream.ComputeEnumSize((int) ResponseCompression);
+      }
+      if (responseStatus_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ResponseStatus);
+      }
       return size;
     }
 
@@ -369,6 +552,15 @@ namespace Grpc.Testing {
       if (other.FillOauthScope != false) {
         FillOauthScope = other.FillOauthScope;
       }
+      if (other.ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        ResponseCompression = other.ResponseCompression;
+      }
+      if (other.responseStatus_ != null) {
+        if (responseStatus_ == null) {
+          responseStatus_ = new global::Grpc.Testing.EchoStatus();
+        }
+        ResponseStatus.MergeFrom(other.ResponseStatus);
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -401,6 +593,17 @@ namespace Grpc.Testing {
             FillOauthScope = input.ReadBool();
             break;
           }
+          case 48: {
+            responseCompression_ = (global::Grpc.Testing.CompressionType) input.ReadEnum();
+            break;
+          }
+          case 58: {
+            if (responseStatus_ == null) {
+              responseStatus_ = new global::Grpc.Testing.EchoStatus();
+            }
+            input.ReadMessage(responseStatus_);
+            break;
+          }
         }
       }
     }
@@ -413,7 +616,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<SimpleResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[2]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[3]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -573,7 +776,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingInputCallRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[3]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[4]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -681,7 +884,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingInputCallResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[4]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[5]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -783,7 +986,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<ResponseParameters> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[5]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[6]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -911,7 +1114,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingOutputCallRequest> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[6]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[7]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -928,6 +1131,8 @@ namespace Grpc.Testing {
       responseType_ = other.responseType_;
       responseParameters_ = other.responseParameters_.Clone();
       Payload = other.payload_ != null ? other.Payload.Clone() : null;
+      responseCompression_ = other.responseCompression_;
+      ResponseStatus = other.responseStatus_ != null ? other.ResponseStatus.Clone() : null;
     }
 
     public StreamingOutputCallRequest Clone() {
@@ -960,6 +1165,24 @@ namespace Grpc.Testing {
       }
     }
 
+    public const int ResponseCompressionFieldNumber = 6;
+    private global::Grpc.Testing.CompressionType responseCompression_ = global::Grpc.Testing.CompressionType.NONE;
+    public global::Grpc.Testing.CompressionType ResponseCompression {
+      get { return responseCompression_; }
+      set {
+        responseCompression_ = value;
+      }
+    }
+
+    public const int ResponseStatusFieldNumber = 7;
+    private global::Grpc.Testing.EchoStatus responseStatus_;
+    public global::Grpc.Testing.EchoStatus ResponseStatus {
+      get { return responseStatus_; }
+      set {
+        responseStatus_ = value;
+      }
+    }
+
     public override bool Equals(object other) {
       return Equals(other as StreamingOutputCallRequest);
     }
@@ -974,6 +1197,8 @@ namespace Grpc.Testing {
       if (ResponseType != other.ResponseType) return false;
       if(!responseParameters_.Equals(other.responseParameters_)) return false;
       if (!object.Equals(Payload, other.Payload)) return false;
+      if (ResponseCompression != other.ResponseCompression) return false;
+      if (!object.Equals(ResponseStatus, other.ResponseStatus)) return false;
       return true;
     }
 
@@ -982,6 +1207,8 @@ namespace Grpc.Testing {
       if (ResponseType != global::Grpc.Testing.PayloadType.COMPRESSABLE) hash ^= ResponseType.GetHashCode();
       hash ^= responseParameters_.GetHashCode();
       if (payload_ != null) hash ^= Payload.GetHashCode();
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) hash ^= ResponseCompression.GetHashCode();
+      if (responseStatus_ != null) hash ^= ResponseStatus.GetHashCode();
       return hash;
     }
 
@@ -999,6 +1226,14 @@ namespace Grpc.Testing {
         output.WriteRawTag(26);
         output.WriteMessage(Payload);
       }
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        output.WriteRawTag(48);
+        output.WriteEnum((int) ResponseCompression);
+      }
+      if (responseStatus_ != null) {
+        output.WriteRawTag(58);
+        output.WriteMessage(ResponseStatus);
+      }
     }
 
     public int CalculateSize() {
@@ -1010,6 +1245,12 @@ namespace Grpc.Testing {
       if (payload_ != null) {
         size += 1 + pb::CodedOutputStream.ComputeMessageSize(Payload);
       }
+      if (ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        size += 1 + pb::CodedOutputStream.ComputeEnumSize((int) ResponseCompression);
+      }
+      if (responseStatus_ != null) {
+        size += 1 + pb::CodedOutputStream.ComputeMessageSize(ResponseStatus);
+      }
       return size;
     }
 
@@ -1027,6 +1268,15 @@ namespace Grpc.Testing {
         }
         Payload.MergeFrom(other.Payload);
       }
+      if (other.ResponseCompression != global::Grpc.Testing.CompressionType.NONE) {
+        ResponseCompression = other.ResponseCompression;
+      }
+      if (other.responseStatus_ != null) {
+        if (responseStatus_ == null) {
+          responseStatus_ = new global::Grpc.Testing.EchoStatus();
+        }
+        ResponseStatus.MergeFrom(other.ResponseStatus);
+      }
     }
 
     public void MergeFrom(pb::CodedInputStream input) {
@@ -1051,6 +1301,17 @@ namespace Grpc.Testing {
             input.ReadMessage(payload_);
             break;
           }
+          case 48: {
+            responseCompression_ = (global::Grpc.Testing.CompressionType) input.ReadEnum();
+            break;
+          }
+          case 58: {
+            if (responseStatus_ == null) {
+              responseStatus_ = new global::Grpc.Testing.EchoStatus();
+            }
+            input.ReadMessage(responseStatus_);
+            break;
+          }
         }
       }
     }
@@ -1063,7 +1324,7 @@ namespace Grpc.Testing {
     public static pb::MessageParser<StreamingOutputCallResponse> Parser { get { return _parser; } }
 
     public static pbr::MessageDescriptor Descriptor {
-      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[7]; }
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[8]; }
     }
 
     pbr::MessageDescriptor pb::IMessage.Descriptor {
@@ -1165,6 +1426,127 @@ namespace Grpc.Testing {
 
   }
 
+  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+  public sealed partial class ReconnectInfo : pb::IMessage<ReconnectInfo> {
+    private static readonly pb::MessageParser<ReconnectInfo> _parser = new pb::MessageParser<ReconnectInfo>(() => new ReconnectInfo());
+    public static pb::MessageParser<ReconnectInfo> Parser { get { return _parser; } }
+
+    public static pbr::MessageDescriptor Descriptor {
+      get { return global::Grpc.Testing.Messages.Descriptor.MessageTypes[9]; }
+    }
+
+    pbr::MessageDescriptor pb::IMessage.Descriptor {
+      get { return Descriptor; }
+    }
+
+    public ReconnectInfo() {
+      OnConstruction();
+    }
+
+    partial void OnConstruction();
+
+    public ReconnectInfo(ReconnectInfo other) : this() {
+      passed_ = other.passed_;
+      backoffMs_ = other.backoffMs_.Clone();
+    }
+
+    public ReconnectInfo Clone() {
+      return new ReconnectInfo(this);
+    }
+
+    public const int PassedFieldNumber = 1;
+    private bool passed_;
+    public bool Passed {
+      get { return passed_; }
+      set {
+        passed_ = value;
+      }
+    }
+
+    public const int BackoffMsFieldNumber = 2;
+    private static readonly pb::FieldCodec<int> _repeated_backoffMs_codec
+        = pb::FieldCodec.ForInt32(18);
+    private readonly pbc::RepeatedField<int> backoffMs_ = new pbc::RepeatedField<int>();
+    public pbc::RepeatedField<int> BackoffMs {
+      get { return backoffMs_; }
+    }
+
+    public override bool Equals(object other) {
+      return Equals(other as ReconnectInfo);
+    }
+
+    public bool Equals(ReconnectInfo other) {
+      if (ReferenceEquals(other, null)) {
+        return false;
+      }
+      if (ReferenceEquals(other, this)) {
+        return true;
+      }
+      if (Passed != other.Passed) return false;
+      if(!backoffMs_.Equals(other.backoffMs_)) return false;
+      return true;
+    }
+
+    public override int GetHashCode() {
+      int hash = 1;
+      if (Passed != false) hash ^= Passed.GetHashCode();
+      hash ^= backoffMs_.GetHashCode();
+      return hash;
+    }
+
+    public override string ToString() {
+      return pb::JsonFormatter.Default.Format(this);
+    }
+
+    public void WriteTo(pb::CodedOutputStream output) {
+      if (Passed != false) {
+        output.WriteRawTag(8);
+        output.WriteBool(Passed);
+      }
+      backoffMs_.WriteTo(output, _repeated_backoffMs_codec);
+    }
+
+    public int CalculateSize() {
+      int size = 0;
+      if (Passed != false) {
+        size += 1 + 1;
+      }
+      size += backoffMs_.CalculateSize(_repeated_backoffMs_codec);
+      return size;
+    }
+
+    public void MergeFrom(ReconnectInfo other) {
+      if (other == null) {
+        return;
+      }
+      if (other.Passed != false) {
+        Passed = other.Passed;
+      }
+      backoffMs_.Add(other.backoffMs_);
+    }
+
+    public void MergeFrom(pb::CodedInputStream input) {
+      uint tag;
+      while ((tag = input.ReadTag()) != 0) {
+        switch(tag) {
+          default:
+            input.SkipLastField();
+            break;
+          case 8: {
+            Passed = input.ReadBool();
+            break;
+          }
+          case 18:
+          case 16: {
+            backoffMs_.AddEntriesFrom(input, _repeated_backoffMs_codec);
+            break;
+          }
+        }
+      }
+    }
+
+  }
+
   #endregion
 
 }

src/csharp/Grpc.IntegrationTesting/MetadataCredentialsTest.cs

@@ -0,0 +1,97 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Grpc.Core;
+using Grpc.Core.Utils;
+using Grpc.Testing;
+using NUnit.Framework;
+
+namespace Grpc.IntegrationTesting
+{
+    public class MetadataCredentialsTest
+    {
+        const string Host = "localhost";
+        Server server;
+        Channel channel;
+        TestService.ITestServiceClient client;
+
+        [TestFixtureSetUp]
+        public void Init()
+        {
+            var serverCredentials = new SslServerCredentials(new[] { new KeyCertificatePair(File.ReadAllText(TestCredentials.ServerCertChainPath), File.ReadAllText(TestCredentials.ServerPrivateKeyPath)) });
+            server = new Server
+            {
+                Services = { TestService.BindService(new TestServiceImpl()) },
+                Ports = { { Host, ServerPort.PickUnused, serverCredentials } }
+            };
+            server.Start();
+
+            var options = new List<ChannelOption>
+            {
+                new ChannelOption(ChannelOptions.SslTargetNameOverride, TestCredentials.DefaultHostOverride)
+            };
+
+            var asyncAuthInterceptor = new AsyncAuthInterceptor(async (authUri, metadata) =>
+            {
+                await Task.Delay(100);  // make sure the operation is asynchronous.
+                metadata.Add("authorization", "SECRET_TOKEN");
+            });
+
+            var clientCredentials = ChannelCredentials.Create(
+                new SslCredentials(File.ReadAllText(TestCredentials.ClientCertAuthorityPath)),
+                new MetadataCredentials(asyncAuthInterceptor));
+            channel = new Channel(Host, server.Ports.Single().BoundPort, clientCredentials, options);
+            client = TestService.NewClient(channel);
+        }
+
+        [TestFixtureTearDown]
+        public void Cleanup()
+        {
+            channel.ShutdownAsync().Wait();
+            server.ShutdownAsync().Wait();
+        }
+
+        [Test]
+        public void MetadataCredentials()
+        {
+            var response = client.UnaryCall(new SimpleRequest { ResponseSize = 10 });
+            Assert.AreEqual(10, response.Payload.Body.Length);
+        }
+    }
+}

src/csharp/Grpc.IntegrationTesting/Test.cs

@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: test.proto
+// source: test/proto/test.proto
 #pragma warning disable 1591, 0612, 3021
 #region Designer generated code
 
@@ -21,21 +21,26 @@ namespace Grpc.Testing {
     static Test() {
       byte[] descriptorData = global::System.Convert.FromBase64String(
           string.Concat(
-            "Cgp0ZXN0LnByb3RvEgxncnBjLnRlc3RpbmcaC2VtcHR5LnByb3RvGg5tZXNz", 
-            "YWdlcy5wcm90bzK7BAoLVGVzdFNlcnZpY2USNQoJRW1wdHlDYWxsEhMuZ3Jw", 
-            "Yy50ZXN0aW5nLkVtcHR5GhMuZ3JwYy50ZXN0aW5nLkVtcHR5EkYKCVVuYXJ5", 
-            "Q2FsbBIbLmdycGMudGVzdGluZy5TaW1wbGVSZXF1ZXN0GhwuZ3JwYy50ZXN0", 
-            "aW5nLlNpbXBsZVJlc3BvbnNlEmwKE1N0cmVhbWluZ091dHB1dENhbGwSKC5n", 
-            "cnBjLnRlc3RpbmcuU3RyZWFtaW5nT3V0cHV0Q2FsbFJlcXVlc3QaKS5ncnBj", 
-            "LnRlc3RpbmcuU3RyZWFtaW5nT3V0cHV0Q2FsbFJlc3BvbnNlMAESaQoSU3Ry", 
-            "ZWFtaW5nSW5wdXRDYWxsEicuZ3JwYy50ZXN0aW5nLlN0cmVhbWluZ0lucHV0", 
-            "Q2FsbFJlcXVlc3QaKC5ncnBjLnRlc3RpbmcuU3RyZWFtaW5nSW5wdXRDYWxs", 
-            "UmVzcG9uc2UoARJpCg5GdWxsRHVwbGV4Q2FsbBIoLmdycGMudGVzdGluZy5T", 
-            "dHJlYW1pbmdPdXRwdXRDYWxsUmVxdWVzdBopLmdycGMudGVzdGluZy5TdHJl", 
-            "YW1pbmdPdXRwdXRDYWxsUmVzcG9uc2UoATABEmkKDkhhbGZEdXBsZXhDYWxs", 
-            "EiguZ3JwYy50ZXN0aW5nLlN0cmVhbWluZ091dHB1dENhbGxSZXF1ZXN0Giku", 
-            "Z3JwYy50ZXN0aW5nLlN0cmVhbWluZ091dHB1dENhbGxSZXNwb25zZSgBMAFi", 
-            "BnByb3RvMw=="));
+            "ChV0ZXN0L3Byb3RvL3Rlc3QucHJvdG8SDGdycGMudGVzdGluZxoWdGVzdC9w", 
+            "cm90by9lbXB0eS5wcm90bxoZdGVzdC9wcm90by9tZXNzYWdlcy5wcm90bzK7", 
+            "BAoLVGVzdFNlcnZpY2USNQoJRW1wdHlDYWxsEhMuZ3JwYy50ZXN0aW5nLkVt", 
+            "cHR5GhMuZ3JwYy50ZXN0aW5nLkVtcHR5EkYKCVVuYXJ5Q2FsbBIbLmdycGMu", 
+            "dGVzdGluZy5TaW1wbGVSZXF1ZXN0GhwuZ3JwYy50ZXN0aW5nLlNpbXBsZVJl", 
+            "c3BvbnNlEmwKE1N0cmVhbWluZ091dHB1dENhbGwSKC5ncnBjLnRlc3Rpbmcu", 
+            "U3RyZWFtaW5nT3V0cHV0Q2FsbFJlcXVlc3QaKS5ncnBjLnRlc3RpbmcuU3Ry", 
+            "ZWFtaW5nT3V0cHV0Q2FsbFJlc3BvbnNlMAESaQoSU3RyZWFtaW5nSW5wdXRD", 
+            "YWxsEicuZ3JwYy50ZXN0aW5nLlN0cmVhbWluZ0lucHV0Q2FsbFJlcXVlc3Qa", 
+            "KC5ncnBjLnRlc3RpbmcuU3RyZWFtaW5nSW5wdXRDYWxsUmVzcG9uc2UoARJp", 
+            "Cg5GdWxsRHVwbGV4Q2FsbBIoLmdycGMudGVzdGluZy5TdHJlYW1pbmdPdXRw", 
+            "dXRDYWxsUmVxdWVzdBopLmdycGMudGVzdGluZy5TdHJlYW1pbmdPdXRwdXRD", 
+            "YWxsUmVzcG9uc2UoATABEmkKDkhhbGZEdXBsZXhDYWxsEiguZ3JwYy50ZXN0", 
+            "aW5nLlN0cmVhbWluZ091dHB1dENhbGxSZXF1ZXN0GikuZ3JwYy50ZXN0aW5n", 
+            "LlN0cmVhbWluZ091dHB1dENhbGxSZXNwb25zZSgBMAEyVQoUVW5pbXBsZW1l", 
+            "bnRlZFNlcnZpY2USPQoRVW5pbXBsZW1lbnRlZENhbGwSEy5ncnBjLnRlc3Rp", 
+            "bmcuRW1wdHkaEy5ncnBjLnRlc3RpbmcuRW1wdHkyfwoQUmVjb25uZWN0U2Vy", 
+            "dmljZRIxCgVTdGFydBITLmdycGMudGVzdGluZy5FbXB0eRoTLmdycGMudGVz", 
+            "dGluZy5FbXB0eRI4CgRTdG9wEhMuZ3JwYy50ZXN0aW5nLkVtcHR5GhsuZ3Jw", 
+            "Yy50ZXN0aW5nLlJlY29ubmVjdEluZm9iBnByb3RvMw=="));
       descriptor = pbr::FileDescriptor.InternalBuildGeneratedFileFrom(descriptorData,
           new pbr::FileDescriptor[] { global::Grpc.Testing.Proto.Empty.Descriptor, global::Grpc.Testing.Messages.Descriptor, },
           new pbr::GeneratedCodeInfo(null, null));

src/csharp/Grpc.IntegrationTesting/TestGrpc.cs

@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: test.proto
+// source: test/proto/test.proto
 #region Designer generated code
 
 using System;
@@ -207,5 +207,191 @@ namespace Grpc.Testing {
     }
 
   }
+  public static class UnimplementedService
+  {
+    static readonly string __ServiceName = "grpc.testing.UnimplementedService";
+
+    static readonly Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
+
+    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_UnimplementedCall = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
+        MethodType.Unary,
+        __ServiceName,
+        "UnimplementedCall",
+        __Marshaller_Empty,
+        __Marshaller_Empty);
+
+    // service descriptor
+    public static global::Google.Protobuf.Reflection.ServiceDescriptor Descriptor
+    {
+      get { return global::Grpc.Testing.Test.Descriptor.Services[1]; }
+    }
+
+    // client interface
+    public interface IUnimplementedServiceClient
+    {
+      global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options);
+      AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options);
+    }
+
+    // server-side interface
+    public interface IUnimplementedService
+    {
+      Task<global::Grpc.Testing.Empty> UnimplementedCall(global::Grpc.Testing.Empty request, ServerCallContext context);
+    }
+
+    // client stub
+    public class UnimplementedServiceClient : ClientBase, IUnimplementedServiceClient
+    {
+      public UnimplementedServiceClient(Channel channel) : base(channel)
+      {
+      }
+      public global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_UnimplementedCall, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.Empty UnimplementedCall(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_UnimplementedCall, options);
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_UnimplementedCall, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Empty> UnimplementedCallAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_UnimplementedCall, options);
+        return Calls.AsyncUnaryCall(call, request);
+      }
+    }
+
+    // creates service definition that can be registered with a server
+    public static ServerServiceDefinition BindService(IUnimplementedService serviceImpl)
+    {
+      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+          .AddMethod(__Method_UnimplementedCall, serviceImpl.UnimplementedCall).Build();
+    }
+
+    // creates a new client
+    public static UnimplementedServiceClient NewClient(Channel channel)
+    {
+      return new UnimplementedServiceClient(channel);
+    }
+
+  }
+  public static class ReconnectService
+  {
+    static readonly string __ServiceName = "grpc.testing.ReconnectService";
+
+    static readonly Marshaller<global::Grpc.Testing.Empty> __Marshaller_Empty = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.Empty.Parser.ParseFrom);
+    static readonly Marshaller<global::Grpc.Testing.ReconnectInfo> __Marshaller_ReconnectInfo = Marshallers.Create((arg) => global::Google.Protobuf.MessageExtensions.ToByteArray(arg), global::Grpc.Testing.ReconnectInfo.Parser.ParseFrom);
+
+    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty> __Method_Start = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.Empty>(
+        MethodType.Unary,
+        __ServiceName,
+        "Start",
+        __Marshaller_Empty,
+        __Marshaller_Empty);
+
+    static readonly Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo> __Method_Stop = new Method<global::Grpc.Testing.Empty, global::Grpc.Testing.ReconnectInfo>(
+        MethodType.Unary,
+        __ServiceName,
+        "Stop",
+        __Marshaller_Empty,
+        __Marshaller_ReconnectInfo);
+
+    // service descriptor
+    public static global::Google.Protobuf.Reflection.ServiceDescriptor Descriptor
+    {
+      get { return global::Grpc.Testing.Test.Descriptor.Services[2]; }
+    }
+
+    // client interface
+    public interface IReconnectServiceClient
+    {
+      global::Grpc.Testing.Empty Start(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::Grpc.Testing.Empty Start(global::Grpc.Testing.Empty request, CallOptions options);
+      AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.Empty request, CallOptions options);
+      global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, CallOptions options);
+      AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken));
+      AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, CallOptions options);
+    }
+
+    // server-side interface
+    public interface IReconnectService
+    {
+      Task<global::Grpc.Testing.Empty> Start(global::Grpc.Testing.Empty request, ServerCallContext context);
+      Task<global::Grpc.Testing.ReconnectInfo> Stop(global::Grpc.Testing.Empty request, ServerCallContext context);
+    }
+
+    // client stub
+    public class ReconnectServiceClient : ClientBase, IReconnectServiceClient
+    {
+      public ReconnectServiceClient(Channel channel) : base(channel)
+      {
+      }
+      public global::Grpc.Testing.Empty Start(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_Start, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.Empty Start(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_Start, options);
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_Start, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.Empty> StartAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_Start, options);
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_Stop, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public global::Grpc.Testing.ReconnectInfo Stop(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_Stop, options);
+        return Calls.BlockingUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, Metadata headers = null, DateTime? deadline = null, CancellationToken cancellationToken = default(CancellationToken))
+      {
+        var call = CreateCall(__Method_Stop, new CallOptions(headers, deadline, cancellationToken));
+        return Calls.AsyncUnaryCall(call, request);
+      }
+      public AsyncUnaryCall<global::Grpc.Testing.ReconnectInfo> StopAsync(global::Grpc.Testing.Empty request, CallOptions options)
+      {
+        var call = CreateCall(__Method_Stop, options);
+        return Calls.AsyncUnaryCall(call, request);
+      }
+    }
+
+    // creates service definition that can be registered with a server
+    public static ServerServiceDefinition BindService(IReconnectService serviceImpl)
+    {
+      return ServerServiceDefinition.CreateBuilder(__ServiceName)
+          .AddMethod(__Method_Start, serviceImpl.Start)
+          .AddMethod(__Method_Stop, serviceImpl.Stop).Build();
+    }
+
+    // creates a new client
+    public static ReconnectServiceClient NewClient(Channel channel)
+    {
+      return new ReconnectServiceClient(channel);
+    }
+
+  }
 }
 #endregion

src/csharp/Grpc.IntegrationTesting/proto/messages.proto

@@ -1,132 +0,0 @@
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Message definitions to be used by integration test service definitions.
-
-syntax = "proto3";
-
-package grpc.testing;
-
-// The type of payload that should be returned.
-enum PayloadType {
-  // Compressable text format.
-  COMPRESSABLE = 0;
-
-  // Uncompressable binary format.
-  UNCOMPRESSABLE = 1;
-
-  // Randomly chosen from all other formats defined in this enum.
-  RANDOM = 2;
-}
-
-// A block of data, to simply increase gRPC message size.
-message Payload {
-  // The type of data in body.
-  PayloadType type = 1;
-  // Primary contents of payload.
-  bytes body = 2;
-}
-
-// Unary request.
-message SimpleRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, server randomly chooses one from other formats.
-  PayloadType response_type = 1;
-
-  // Desired payload size in the response from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
-  int32 response_size = 2;
-
-  // Optional input payload sent along with the request.
-  Payload payload = 3;
-
-  // Whether SimpleResponse should include username.
-  bool fill_username = 4;
-
-  // Whether SimpleResponse should include OAuth scope.
-  bool fill_oauth_scope = 5;
-}
-
-// Unary response, as configured by the request.
-message SimpleResponse {
-  // Payload to increase message size.
-  Payload payload = 1;
-  // The user the request came from, for verifying authentication was
-  // successful when the client expected it.
-  string username = 2;
-  // OAuth scope.
-  string oauth_scope = 3;
-}
-
-// Client-streaming request.
-message StreamingInputCallRequest {
-  // Optional input payload sent along with the request.
-  Payload payload = 1;
-
-  // Not expecting any payload from the response.
-}
-
-// Client-streaming response.
-message StreamingInputCallResponse {
-  // Aggregated size of payloads received from the client.
-  int32 aggregated_payload_size = 1;
-}
-
-// Configuration for a particular response.
-message ResponseParameters {
-  // Desired payload sizes in responses from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
-  int32 size = 1;
-
-  // Desired interval between consecutive responses in the response stream in
-  // microseconds.
-  int32 interval_us = 2;
-}
-
-// Server-streaming request.
-message StreamingOutputCallRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, the payload from each response in the stream
-  // might be of different types. This is to simulate a mixed type of payload
-  // stream.
-  PayloadType response_type = 1;
-
-  // Configuration for each expected response message.
-  repeated ResponseParameters response_parameters = 2;
-
-  // Optional input payload sent along with the request.
-  Payload payload = 3;
-}
-
-// Server-streaming response, as configured by the request and parameters.
-message StreamingOutputCallResponse {
-  // Payload to increase response size.
-  Payload payload = 1;
-}

src/csharp/Grpc.IntegrationTesting/proto/test.proto

@@ -1,71 +0,0 @@
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// An integration test service that covers all the method signature permutations
-// of unary/streaming requests/responses.
-syntax = "proto3";
-
-import "empty.proto";
-import "messages.proto";
-
-package grpc.testing;
-
-// A simple service to test the various types of RPCs and experiment with
-// performance with various types of payload.
-service TestService {
-  // One empty request followed by one empty response.
-  rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
-
-  // One request followed by one response.
-  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
-
-  // One request followed by a sequence of responses (streamed download).
-  // The server returns the payload with client desired type and sizes.
-  rpc StreamingOutputCall(StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-
-  // A sequence of requests followed by one response (streamed upload).
-  // The server returns the aggregated size of client payload as the result.
-  rpc StreamingInputCall(stream StreamingInputCallRequest)
-      returns (StreamingInputCallResponse);
-
-  // A sequence of requests with each request served by the server immediately.
-  // As one request could lead to multiple responses, this interface
-  // demonstrates the idea of full duplexing.
-  rpc FullDuplexCall(stream StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-
-  // A sequence of requests followed by a sequence of responses.
-  // The server buffers all the client requests and then serves them in order. A
-  // stream of responses are returned to the client when the server starts with
-  // first request.
-  rpc HalfDuplexCall(stream StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-}

src/csharp/build_packages.bat

@@ -20,9 +20,9 @@ endlocal
 
 @call ..\..\vsprojects\build_plugins.bat || goto :error
 
-%NUGET% pack ..\..\vsprojects\nuget_package\grpc.native.csharp_ext.nuspec -Version %CORE_VERSION% || goto :error
+%NUGET% pack ..\..\vsprojects\nuget_package\grpc.native.csharp.nuspec -Version %CORE_VERSION% || goto :error
 %NUGET% pack Grpc.Auth\Grpc.Auth.nuspec -Symbols -Version %VERSION% || goto :error
-%NUGET% pack Grpc.Core\Grpc.Core.nuspec -Symbols -Version %VERSION% -Properties GrpcNativeCsharpExtVersion=%CORE_VERSION% || goto :error
+%NUGET% pack Grpc.Core\Grpc.Core.nuspec -Symbols -Version %VERSION% -Properties GrpcNativeCsharpVersion=%CORE_VERSION% || goto :error
 %NUGET% pack Grpc.HealthCheck\Grpc.HealthCheck.nuspec -Symbols -Version %VERSION_WITH_BETA% -Properties ProtobufVersion=%PROTOBUF_VERSION% || goto :error
 %NUGET% pack Grpc.Tools.nuspec -Version %VERSION% || goto :error
 %NUGET% pack Grpc.nuspec -Version %VERSION% || goto :error

src/csharp/ext/grpc_csharp_ext.c

@@ -68,7 +68,7 @@ grpc_byte_buffer *string_to_byte_buffer(const char *buffer, size_t len) {
 /*
  * Helper to maintain lifetime of batch op inputs and store batch op outputs.
  */
-typedef struct gprcsharp_batch_context {
+typedef struct grpcsharp_batch_context {
   grpc_metadata_array send_initial_metadata;
   grpc_byte_buffer *send_message;
   struct {
@@ -665,16 +665,16 @@ grpcsharp_call_start_duplex_streaming(grpc_call *call,
 }
 
 GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_recv_initial_metadata(
-	grpc_call *call, grpcsharp_batch_context *ctx) {
-	/* TODO: don't use magic number */
-	grpc_op ops[1];
-	ops[0].op = GRPC_OP_RECV_INITIAL_METADATA;
-	ops[0].data.recv_initial_metadata = &(ctx->recv_initial_metadata);
-	ops[0].flags = 0;
-	ops[0].reserved = NULL;
+  grpc_call *call, grpcsharp_batch_context *ctx) {
+  /* TODO: don't use magic number */
+  grpc_op ops[1];
+  ops[0].op = GRPC_OP_RECV_INITIAL_METADATA;
+  ops[0].data.recv_initial_metadata = &(ctx->recv_initial_metadata);
+  ops[0].flags = 0;
+  ops[0].reserved = NULL;
 
-	return grpc_call_start_batch(call, ops, sizeof(ops) / sizeof(ops[0]), ctx,
-		NULL);
+  return grpc_call_start_batch(call, ops, sizeof(ops) / sizeof(ops[0]), ctx,
+    NULL);
 }
 
 GPR_EXPORT grpc_call_error GPR_CALLTYPE
@@ -785,6 +785,11 @@ grpcsharp_call_send_initial_metadata(grpc_call *call,
                                NULL);
 }
 
+GPR_EXPORT grpc_call_error GPR_CALLTYPE grpcsharp_call_set_credentials(grpc_call *call,
+                                                            grpc_credentials *creds) {
+	return grpc_call_set_credentials(call, creds);
+}
+
 /* Server */
 
 GPR_EXPORT grpc_server *GPR_CALLTYPE
@@ -892,6 +897,47 @@ grpcsharp_server_add_secure_http2_port(grpc_server *server, const char *addr,
   return grpc_server_add_secure_http2_port(server, addr, creds);
 }
 
+GPR_EXPORT grpc_credentials *GPR_CALLTYPE grpcsharp_composite_credentials_create(
+  grpc_credentials *creds1,
+  grpc_credentials *creds2) {
+  return grpc_composite_credentials_create(creds1, creds2, NULL);
+}
+
+/* Metadata credentials plugin */
+
+GPR_EXPORT void GPR_CALLTYPE grpcsharp_metadata_credentials_notify_from_plugin(
+    grpc_credentials_plugin_metadata_cb cb,
+    void *user_data, grpc_metadata_array *metadata,
+  grpc_status_code status, const char *error_details) {
+  cb(user_data, metadata->metadata, metadata->count, status, error_details);
+}
+
+typedef void(GPR_CALLTYPE *grpcsharp_metadata_interceptor_func)(
+  void *state, const char *service_url, grpc_credentials_plugin_metadata_cb cb,
+  void *user_data, gpr_int32 is_destroy);
+
+static void grpcsharp_get_metadata_handler(void *state, const char *service_url,
+  grpc_credentials_plugin_metadata_cb cb, void *user_data) {
+  grpcsharp_metadata_interceptor_func interceptor =
+      (grpcsharp_metadata_interceptor_func)(gpr_intptr)state;
+  interceptor(state, service_url, cb, user_data, 0);
+}
+
+static void grpcsharp_metadata_credentials_destroy_handler(void *state) {
+  grpcsharp_metadata_interceptor_func interceptor =
+      (grpcsharp_metadata_interceptor_func)(gpr_intptr)state;
+  interceptor(state, NULL, NULL, NULL, 1);
+}
+
+GPR_EXPORT grpc_credentials *GPR_CALLTYPE grpcsharp_metadata_credentials_create_from_plugin(
+  grpcsharp_metadata_interceptor_func metadata_interceptor) {
+  grpc_metadata_credentials_plugin plugin;
+  plugin.get_metadata = grpcsharp_get_metadata_handler;
+  plugin.destroy = grpcsharp_metadata_credentials_destroy_handler;
+  plugin.state = (void*)(gpr_intptr)metadata_interceptor;
+  return grpc_metadata_credentials_create_from_plugin(plugin, NULL);
+}
+
 /* Logging */
 
 typedef void(GPR_CALLTYPE *grpcsharp_log_func)(const char *file, gpr_int32 line,

src/csharp/generate_proto_csharp.sh

@@ -42,7 +42,7 @@ $PROTOC --plugin=$PLUGIN --csharp_out=$EXAMPLES_DIR --grpc_out=$EXAMPLES_DIR \
     -I $EXAMPLES_DIR/proto $EXAMPLES_DIR/proto/math.proto
 
 $PROTOC --plugin=$PLUGIN --csharp_out=$INTEROP_DIR --grpc_out=$INTEROP_DIR \
-    -I $INTEROP_DIR/proto $INTEROP_DIR/proto/*.proto
+    -I ../.. ../../test/proto/*.proto
 
 $PROTOC --plugin=$PLUGIN --csharp_out=$HEALTHCHECK_DIR --grpc_out=$HEALTHCHECK_DIR \
     -I $HEALTHCHECK_DIR/proto $HEALTHCHECK_DIR/proto/health.proto

src/node/LICENSE

@@ -1,28 +0,0 @@
-Copyright 2015, Google Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

src/node/README.md

@@ -5,51 +5,19 @@ Beta
 
 ## PREREQUISITES
 - `node`: This requires `node` to be installed. If you instead have the `nodejs` executable on Debian, you should install the [`nodejs-legacy`](https://packages.debian.org/sid/nodejs-legacy) package.
-- [homebrew][] on Mac OS X.  These simplify the installation of the gRPC C core.
 
 ## INSTALLATION
 
-**Linux (Debian):**
-
-Add [Debian jessie-backports][] to your `sources.list` file. Example:
-
-```sh
-echo "deb http://http.debian.net/debian jessie-backports main" | \
-sudo tee -a /etc/apt/sources.list
-```
-
-Install the gRPC Debian package
-
-```sh
-sudo apt-get update
-sudo apt-get install libgrpc-dev
-```
-
 Install the gRPC NPM package
 
 ```sh
 npm install grpc
 ```
 
-**Mac OS X**
-
-Install [homebrew][]. Run the following command to install gRPC Node.js.
-```sh
-$ curl -fsSL https://goo.gl/getgrpc | bash -s nodejs
-```
-This will download and run the [gRPC install script][], then install the latest version of gRPC Nodejs npm package.
-
 ## BUILD FROM SOURCE
  1. Clone [the grpc Git Repository](https://github.com/grpc/grpc).
- 2. Follow the instructions in the `INSTALL` file in the root of that repository to install the C core library that this package depends on.
  3. Run `npm install`.
 
-If you install the gRPC C core library in a custom location, then you need to set some environment variables to install this library. The command will look like this:
-
-```sh
-CXXFLAGS=-I<custom location>/include LDFLAGS=-L<custom location>/lib npm install [grpc]
-```
-
 ## TESTING
 To run the test suite, simply run `npm test` in the install location.
 
@@ -110,7 +78,3 @@ ServerCredentials
 ```
 
 An object with factory methods for creating credential objects for servers.
-
-[homebrew]:http://brew.sh
-[gRPC install script]:https://raw.githubusercontent.com/grpc/homebrew-grpc/master/scripts/install
-[Debian jessie-backports]:http://backports.debian.org/Instructions/

src/node/bin/README.md

@@ -1,16 +0,0 @@
-# Command Line Tools
-
-# Service Packager
-
-The command line tool `bin/service_packager`, when called with the following command line:
-
-```bash
-service_packager proto_file -o output_path -n name -v version [-i input_path...]
-```
-
-Populates `output_path` with a node package consisting of a `package.json` populated with `name` and `version`, an `index.js`, a `LICENSE` file copied from gRPC, and a `service.json`, which is compiled from `proto_file` and the given `input_path`s. `require('output_path')` returns an object that is equivalent to
-
-```js
-{ client: require('grpc').load('service.json'),
-  auth: require('google-auth-library') }
-```

src/node/bin/service_packager

@@ -1,2 +0,0 @@
-#!/usr/bin/env node
-require(__dirname+'/../cli/service_packager.js').main(process.argv.slice(2));

src/node/binding.gyp

@@ -1,100 +0,0 @@
-{
-  "variables" : {
-    'config': '<!(echo $CONFIG)'
-  },
-  "targets" : [
-    {
-      'include_dirs': [
-        "<!(node -e \"require('nan')\")"
-      ],
-      'cflags': [
-        '-std=c++0x',
-        '-Wall',
-        '-pthread',
-        '-g',
-        '-zdefs',
-        '-Werror',
-        '-Wno-error=deprecated-declarations'
-      ],
-      'ldflags': [
-        '-g'
-      ],
-      "conditions": [
-        ['OS != "win"', {
-          'variables': {
-            'pkg_config_grpc': '<!(pkg-config --exists grpc >/dev/null 2>&1 && echo true || echo false)'
-          },
-          'conditions': [
-            ['config=="gcov"', {
-              'cflags': [
-                '-ftest-coverage',
-                '-fprofile-arcs',
-                '-O0'
-              ],
-              'ldflags': [
-                '-ftest-coverage',
-                '-fprofile-arcs'
-              ]
-            }
-           ],
-            ['pkg_config_grpc == "true"', {
-              'link_settings': {
-                'libraries': [
-                  '<!@(pkg-config --libs-only-l --static grpc)'
-                ]
-              },
-              'cflags': [
-                '<!@(pkg-config --cflags grpc)'
-              ],
-              'libraries': [
-                '<!@(pkg-config --libs-only-L --static grpc)'
-              ],
-              'ldflags': [
-                '<!@(pkg-config --libs-only-other --static grpc)'
-              ]
-              }, {
-                'link_settings': {
-                  'libraries': [
-                    '-lpthread',
-                    '-lgrpc',
-                    '-lgpr'
-                  ],
-                },
-                'conditions':[
-                  ['OS != "mac"', {
-                    'link_settings': {
-                      'libraries': [
-                        '-lrt'
-                      ]
-                    }
-                  }]
-                ]
-              }
-           ]
-          ]
-        }],
-        ['OS == "mac"', {
-          'xcode_settings': {
-            'MACOSX_DEPLOYMENT_TARGET': '10.9',
-            'OTHER_CFLAGS': [
-              '-std=c++11',
-              '-stdlib=libc++'
-            ]
-          }
-        }]
-      ],
-      "target_name": "grpc",
-      "sources": [
-        "ext/byte_buffer.cc",
-        "ext/call.cc",
-        "ext/channel.cc",
-        "ext/completion_queue_async_worker.cc",
-        "ext/credentials.cc",
-        "ext/node_grpc.cc",
-        "ext/server.cc",
-        "ext/server_credentials.cc",
-        "ext/timeval.cc"
-      ]
-    }
-  ]
-}

src/node/cli/service_packager.js

@@ -1,142 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-'use strict';
-
-var fs = require('fs');
-var path = require('path');
-
-var _ = require('lodash');
-var async = require('async');
-var pbjs = require('protobufjs/cli/pbjs');
-var parseArgs = require('minimist');
-var Mustache = require('mustache');
-
-var package_json = require('../package.json');
-
-var template_path = path.resolve(__dirname, 'service_packager');
-
-var package_tpl_path = path.join(template_path, 'package.json.template');
-
-var arg_format = {
-  string: ['include', 'out', 'name', 'version'],
-  alias: {
-    include: 'i',
-    out: 'o',
-    name: 'n',
-    version: 'v'
-  }
-};
-
-// TODO(mlumish): autogenerate README.md from proto file
-
-/**
- * Render package.json file from template using provided parameters.
- * @param {Object} params Map of parameter names to values
- * @param {function(Error, string)} callback Callback to pass rendered template
- *     text to
- */
-function generatePackage(params, callback) {
-  fs.readFile(package_tpl_path, {encoding: 'utf-8'}, function(err, template) {
-    if (err) {
-      callback(err);
-    } else {
-      var rendered = Mustache.render(template, params);
-      callback(null, rendered);
-    }
-  });
-}
-
-/**
- * Copy a file
- * @param {string} src_path The filepath to copy from
- * @param {string} dest_path The filepath to copy to
- */
-function copyFile(src_path, dest_path) {
-  fs.createReadStream(src_path).pipe(fs.createWriteStream(dest_path));
-}
-
-/**
- * Run the script. Copies the index.js and LICENSE files to the output path,
- * renders the package.json template to the output path, and generates a
- * service.json file from the input proto files using pbjs. The arguments are
- * taken directly from the command line, and handled as follows:
- * -i (--include) : An include path for pbjs (can be dpulicated)
- * -o (--output): The output path
- * -n (--name): The name of the package
- * -v (--version): The package version
- * @param {Array} argv The argument vector
- */
-function main(argv) {
-  var args = parseArgs(argv, arg_format);
-  var out_path = path.resolve(args.out);
-  var include_dirs = [];
-  if (args.include) {
-    include_dirs = _.map(_.flatten([args.include]), function(p) {
-      return path.resolve(p);
-    });
-  }
-  args.grpc_version = package_json.version;
-  generatePackage(args, function(err, rendered) {
-    if (err) throw err;
-    fs.writeFile(path.join(out_path, 'package.json'), rendered, function(err) {
-      if (err) throw err;
-    });
-  });
-  copyFile(path.join(template_path, 'index.js'),
-           path.join(out_path, 'index.js'));
-  copyFile(path.join(__dirname, '..', 'LICENSE'),
-           path.join(out_path, 'LICENSE'));
-
-  var service_stream = fs.createWriteStream(path.join(out_path,
-                                                      'service.json'));
-  var pbjs_args = _.flatten(['node', 'pbjs',
-                             args._[0],
-                             '-legacy',
-                             _.map(include_dirs, function(dir) {
-                               return "-path=" + dir;
-                             })]);
-  var old_stdout = process.stdout;
-  process.__defineGetter__('stdout', function() {
-    return service_stream;
-  });
-  var pbjs_status = pbjs.main(pbjs_args);
-  process.__defineGetter__('stdout', function() {
-    return old_stdout;
-  });
-  if (pbjs_status !== pbjs.STATUS_OK) {
-    throw new Error('pbjs failed with status code ' + pbjs_status);
-  }
-}
-
-exports.main = main;

src/node/cli/service_packager/index.js

@@ -1,36 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var grpc = require('grpc');
-exports.client = grpc.load(__dirname + '/service.json', 'json');
-exports.auth = require('google-auth-library');

src/node/cli/service_packager/package.json.template

@@ -1,17 +0,0 @@
-{
-  "name": "{{{name}}}",
-  "version": "{{{version}}}",
-  "author": "Google Inc.",
-  "description": "Client library for {{{name}}} built on gRPC",
-  "license": "Apache-2.0",
-  "dependencies": {
-    "grpc": "{{{grpc_version}}}",
-    "google-auth-library": "^0.9.2"
-  },
-  "main": "index.js",
-  "files": [
-    "LICENSE",
-    "index.js",
-    "service.json"
-  ]
-}

src/node/examples/stock_client.js

@@ -1,47 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-var grpc = require('..');
-var examples = grpc.load(__dirname + '/stock.proto').examples;
-
-/**
- * This exports a client constructor for the Stock service. The usage looks like
- *
- * var StockClient = require('stock_client.js');
- * var stockClient = new StockClient(server_address,
- *                                   grpc.Credentials.createInsecure());
- * stockClient.getLastTradePrice({symbol: 'GOOG'}, function(error, response) {
- *   console.log(error || response);
- * });
- */
-module.exports = examples.Stock;

src/node/examples/stock_server.js

@@ -1,87 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-'use strict';
-
-var _ = require('lodash');
-var grpc = require('..');
-var examples = grpc.load(__dirname + '/stock.proto').examples;
-
-function getLastTradePrice(call, callback) {
-  callback(null, {symbol: call.request.symbol, price: 88});
-}
-
-function watchFutureTrades(call) {
-  for (var i = 0; i < call.request.num_trades_to_watch; i++) {
-    call.write({price: 88.00 + i * 10.00});
-  }
-  call.end();
-}
-
-function getHighestTradePrice(call, callback) {
-  var trades = [];
-  call.on('data', function(data) {
-    trades.push({symbol: data.symbol, price: _.random(0, 100)});
-  });
-  call.on('end', function() {
-    if(_.isEmpty(trades)) {
-      callback(null, {});
-    } else {
-      callback(null, _.max(trades, function(trade){return trade.price;}));
-    }
-  });
-}
-
-function getLastTradePriceMultiple(call) {
-  call.on('data', function(data) {
-    call.write({price: 88});
-  });
-  call.on('end', function() {
-    call.end();
-  });
-}
-
-var stockServer = new grpc.Server();
-stockServer.addProtoService(examples.Stock.service, {
-  getLastTradePrice: getLastTradePrice,
-  getLastTradePriceMultiple: getLastTradePriceMultiple,
-  watchFutureTrades: watchFutureTrades,
-  getHighestTradePrice: getHighestTradePrice
-});
-
-if (require.main === module) {
-  stockServer.bind('0.0.0.0:50051', grpc.ServerCredentials.createInsecure());
-  stockServer.start();
-}
-
-module.exports = stockServer;

src/node/ext/call.cc

@@ -39,12 +39,14 @@
 
 #include "grpc/support/log.h"
 #include "grpc/grpc.h"
+#include "grpc/grpc_security.h"
 #include "grpc/support/alloc.h"
 #include "grpc/support/time.h"
 #include "byte_buffer.h"
 #include "call.h"
 #include "channel.h"
 #include "completion_queue_async_worker.h"
+#include "call_credentials.h"
 #include "timeval.h"
 
 using std::unique_ptr;
@@ -168,8 +170,9 @@ Local<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
     }
     if (EndsWith(elem->key, "-bin")) {
       Nan::Set(array, index_map[elem->key],
-               Nan::CopyBuffer(elem->value,
-                               elem->value_length).ToLocalChecked());
+               MakeFastBuffer(
+                   Nan::CopyBuffer(elem->value,
+                                   elem->value_length).ToLocalChecked()));
     } else {
       Nan::Set(array, index_map[elem->key],
                Nan::New(elem->value).ToLocalChecked());
@@ -501,6 +504,7 @@ void Call::Init(Local<Object> exports) {
   Nan::SetPrototypeMethod(tpl, "cancel", Cancel);
   Nan::SetPrototypeMethod(tpl, "cancelWithStatus", CancelWithStatus);
   Nan::SetPrototypeMethod(tpl, "getPeer", GetPeer);
+  Nan::SetPrototypeMethod(tpl, "setCredentials", SetCredentials);
   fun_tpl.Reset(tpl);
   Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
   Nan::Set(exports, Nan::New("Call").ToLocalChecked(), ctr);
@@ -724,5 +728,26 @@ NAN_METHOD(Call::GetPeer) {
   info.GetReturnValue().Set(peer_value);
 }
 
+NAN_METHOD(Call::SetCredentials) {
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError(
+        "setCredentials can only be called on Call objects");
+  }
+  if (!CallCredentials::HasInstance(info[0])) {
+    return Nan::ThrowTypeError(
+        "setCredentials' first argument must be a CallCredentials");
+  }
+  Call *call = ObjectWrap::Unwrap<Call>(info.This());
+  CallCredentials *creds_object = ObjectWrap::Unwrap<CallCredentials>(
+      Nan::To<Object>(info[0]).ToLocalChecked());
+  grpc_credentials *creds = creds_object->GetWrappedCredentials();
+  grpc_call_error error = GRPC_CALL_ERROR;
+  if (creds) {
+    error = grpc_call_set_credentials(call->wrapped_call, creds);
+  }
+  info.GetReturnValue().Set(Nan::New<Uint32>(error));
+}
+
 }  // namespace node
 }  // namespace grpc

src/node/ext/call.h

@@ -73,6 +73,10 @@ struct Resources {
   std::vector<unique_ptr<PersistentValue> > handles;
 };
 
+bool CreateMetadataArray(v8::Local<v8::Object> metadata,
+                         grpc_metadata_array *array,
+                         shared_ptr<Resources> resources);
+
 class Op {
  public:
   virtual v8::Local<v8::Value> GetNodeValue() const = 0;
@@ -122,6 +126,7 @@ class Call : public Nan::ObjectWrap {
   static NAN_METHOD(Cancel);
   static NAN_METHOD(CancelWithStatus);
   static NAN_METHOD(GetPeer);
+  static NAN_METHOD(SetCredentials);
   static Nan::Callback *constructor;
   // Used for typechecking instances of this javascript class
   static Nan::Persistent<v8::FunctionTemplate> fun_tpl;

src/node/ext/call_credentials.cc

@@ -0,0 +1,259 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <node.h>
+
+#include "grpc/grpc.h"
+#include "grpc/grpc_security.h"
+#include "grpc/support/log.h"
+#include "call_credentials.h"
+#include "call.h"
+
+namespace grpc {
+namespace node {
+
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
+using v8::Exception;
+using v8::External;
+using v8::Function;
+using v8::FunctionTemplate;
+using v8::Integer;
+using v8::Local;
+using v8::Object;
+using v8::ObjectTemplate;
+using v8::Value;
+
+Nan::Callback *CallCredentials::constructor;
+Persistent<FunctionTemplate> CallCredentials::fun_tpl;
+
+CallCredentials::CallCredentials(grpc_credentials *credentials)
+    : wrapped_credentials(credentials) {}
+
+CallCredentials::~CallCredentials() {
+  grpc_credentials_release(wrapped_credentials);
+}
+
+void CallCredentials::Init(Local<Object> exports) {
+  HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("CallCredentials").ToLocalChecked());
+  tpl->InstanceTemplate()->SetInternalFieldCount(1);
+  Nan::SetPrototypeMethod(tpl, "compose", Compose);
+  fun_tpl.Reset(tpl);
+  Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
+  Nan::Set(ctr, Nan::New("createFromPlugin").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateFromPlugin)).ToLocalChecked());
+  Nan::Set(exports, Nan::New("CallCredentials").ToLocalChecked(), ctr);
+  constructor = new Nan::Callback(ctr);
+}
+
+bool CallCredentials::HasInstance(Local<Value> val) {
+  HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
+}
+
+Local<Value> CallCredentials::WrapStruct(grpc_credentials *credentials) {
+  EscapableHandleScope scope;
+  const int argc = 1;
+  if (credentials == NULL) {
+    return scope.Escape(Nan::Null());
+  }
+  Local<Value> argv[argc] = {
+    Nan::New<External>(reinterpret_cast<void *>(credentials))};
+  MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+      constructor->GetFunction(), argc, argv);
+  if (maybe_instance.IsEmpty()) {
+    return scope.Escape(Nan::Null());
+  } else {
+    return scope.Escape(maybe_instance.ToLocalChecked());
+  }
+}
+
+grpc_credentials *CallCredentials::GetWrappedCredentials() {
+  return wrapped_credentials;
+}
+
+NAN_METHOD(CallCredentials::New) {
+  if (info.IsConstructCall()) {
+    if (!info[0]->IsExternal()) {
+      return Nan::ThrowTypeError(
+          "CallCredentials can only be created with the provided functions");
+    }
+    Local<External> ext = info[0].As<External>();
+    grpc_credentials *creds_value =
+        reinterpret_cast<grpc_credentials *>(ext->Value());
+    CallCredentials *credentials = new CallCredentials(creds_value);
+    credentials->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
+    return;
+  } else {
+    const int argc = 1;
+    Local<Value> argv[argc] = {info[0]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+    }
+  }
+}
+
+NAN_METHOD(CallCredentials::Compose) {
+  if (!CallCredentials::HasInstance(info.This())) {
+    return Nan::ThrowTypeError(
+        "compose can only be called on CallCredentials objects");
+  }
+  if (!CallCredentials::HasInstance(info[0])) {
+    return Nan::ThrowTypeError(
+        "compose's first argument must be a CallCredentials object");
+  }
+  CallCredentials *self = ObjectWrap::Unwrap<CallCredentials>(info.This());
+  CallCredentials *other = ObjectWrap::Unwrap<CallCredentials>(
+      Nan::To<Object>(info[0]).ToLocalChecked());
+  grpc_credentials *creds = grpc_composite_credentials_create(
+      self->wrapped_credentials, other->wrapped_credentials, NULL);
+  info.GetReturnValue().Set(WrapStruct(creds));
+}
+
+
+
+NAN_METHOD(CallCredentials::CreateFromPlugin) {
+  if (!info[0]->IsFunction()) {
+    return Nan::ThrowTypeError(
+        "createFromPlugin's argument must be a function");
+  }
+  grpc_metadata_credentials_plugin plugin;
+  plugin_state *state = new plugin_state;
+  state->callback = new Nan::Callback(info[0].As<Function>());
+  plugin.get_metadata = plugin_get_metadata;
+  plugin.destroy = plugin_destroy_state;
+  plugin.state = reinterpret_cast<void*>(state);
+  grpc_credentials *creds = grpc_metadata_credentials_create_from_plugin(plugin,
+                                                                         NULL);
+  info.GetReturnValue().Set(WrapStruct(creds));
+}
+
+NAN_METHOD(PluginCallback) {
+  // Arguments: status code, error details, metadata
+  if (!info[0]->IsUint32()) {
+    return Nan::ThrowTypeError(
+        "The callback's first argument must be a status code");
+  }
+  if (!info[1]->IsString()) {
+    return Nan::ThrowTypeError(
+        "The callback's second argument must be a string");
+  }
+  if (!info[2]->IsObject()) {
+    return Nan::ThrowTypeError(
+        "The callback's third argument must be an object");
+  }
+  shared_ptr<Resources> resources(new Resources);
+  grpc_status_code code = static_cast<grpc_status_code>(
+      Nan::To<uint32_t>(info[0]).FromJust());
+  char *details = *Utf8String(info[1]);
+  grpc_metadata_array array;
+  if (!CreateMetadataArray(Nan::To<Object>(info[2]).ToLocalChecked(),
+                           &array, resources)){
+    return Nan::ThrowError("Failed to parse metadata");
+  }
+  grpc_credentials_plugin_metadata_cb cb =
+      reinterpret_cast<grpc_credentials_plugin_metadata_cb>(
+          Nan::Get(info.Callee(),
+                   Nan::New("cb").ToLocalChecked()
+                   ).ToLocalChecked().As<External>()->Value());
+  void *user_data =
+      Nan::Get(info.Callee(),
+               Nan::New("user_data").ToLocalChecked()
+               ).ToLocalChecked().As<External>()->Value();
+  cb(user_data, array.metadata, array.count, code, details);
+}
+
+NAUV_WORK_CB(SendPluginCallback) {
+  Nan::HandleScope scope;
+  plugin_callback_data *data = reinterpret_cast<plugin_callback_data*>(
+      async->data);
+  // Attach cb and user_data to plugin_callback so that it can access them later
+  v8::Local<v8::Function> plugin_callback = Nan::GetFunction(
+      Nan::New<v8::FunctionTemplate>(PluginCallback)).ToLocalChecked();
+  Nan::Set(plugin_callback, Nan::New("cb").ToLocalChecked(),
+           Nan::New<v8::External>(reinterpret_cast<void*>(data->cb)));
+  Nan::Set(plugin_callback, Nan::New("user_data").ToLocalChecked(),
+           Nan::New<v8::External>(data->user_data));
+  const int argc = 2;
+  v8::Local<v8::Value> argv[argc] = {
+    Nan::New(data->service_url).ToLocalChecked(),
+    plugin_callback
+  };
+  Nan::Callback *callback = data->state->callback;
+  callback->Call(argc, argv);
+  delete data;
+  uv_unref((uv_handle_t *)async);
+  uv_close((uv_handle_t *)async, (uv_close_cb)free);
+}
+
+void plugin_get_metadata(void *state, const char *service_url,
+                         grpc_credentials_plugin_metadata_cb cb,
+                         void *user_data) {
+  uv_async_t *async = static_cast<uv_async_t*>(malloc(sizeof(uv_async_t)));
+  uv_async_init(uv_default_loop(),
+                async,
+                SendPluginCallback);
+  plugin_callback_data *data = new plugin_callback_data;
+  data->state = reinterpret_cast<plugin_state*>(state);
+  data->service_url = service_url;
+  data->cb = cb;
+  data->user_data = user_data;
+  async->data = data;
+  /* libuv says that it will coalesce calls to uv_async_send. If there is ever a
+   * problem with a callback not getting called, that is probably the reason */
+  uv_async_send(async);
+}
+
+void plugin_destroy_state(void *ptr) {
+  plugin_state *state = reinterpret_cast<plugin_state *>(ptr);
+  delete state->callback;
+}
+
+}  // namespace node
+}  // namespace grpc

src/node/ext/call_credentials.h

@@ -0,0 +1,100 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_NODE_CALL_CREDENTIALS_H_
+#define GRPC_NODE_CALL_CREDENTIALS_H_
+
+#include <node.h>
+#include <nan.h>
+#include "grpc/grpc_security.h"
+
+namespace grpc {
+namespace node {
+
+class CallCredentials : public Nan::ObjectWrap {
+ public:
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
+  /* Wrap a grpc_credentials struct in a javascript object */
+  static v8::Local<v8::Value> WrapStruct(grpc_credentials *credentials);
+
+  /* Returns the grpc_credentials struct that this object wraps */
+  grpc_credentials *GetWrappedCredentials();
+
+ private:
+  explicit CallCredentials(grpc_credentials *credentials);
+  ~CallCredentials();
+
+  // Prevent copying
+  CallCredentials(const CallCredentials &);
+  CallCredentials &operator=(const CallCredentials &);
+
+  static NAN_METHOD(New);
+  static NAN_METHOD(CreateSsl);
+  static NAN_METHOD(CreateFromPlugin);
+
+  static NAN_METHOD(Compose);
+  static Nan::Callback *constructor;
+  // Used for typechecking instances of this javascript class
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
+
+  grpc_credentials *wrapped_credentials;
+};
+
+/* Auth metadata plugin functionality */
+
+typedef struct plugin_state {
+  Nan::Callback *callback;
+} plugin_state;
+
+typedef struct plugin_callback_data {
+  plugin_state *state;
+  const char *service_url;
+  grpc_credentials_plugin_metadata_cb cb;
+  void *user_data;
+} plugin_callback_data;
+
+void plugin_get_metadata(void *state, const char *service_url,
+                         grpc_credentials_plugin_metadata_cb cb,
+                         void *user_data);
+
+void plugin_destroy_state(void *state);
+
+NAN_METHOD(PluginCallback);
+
+NAUV_WORK_CB(SendPluginCallback);
+
+}  // namespace node
+}  // namepsace grpc
+
+#endif  // GRPC_NODE_CALL_CREDENTIALS_H_

src/node/ext/channel.cc

@@ -42,7 +42,7 @@
 #include "call.h"
 #include "channel.h"
 #include "completion_queue_async_worker.h"
-#include "credentials.h"
+#include "channel_credentials.h"
 #include "timeval.h"
 
 namespace grpc {
@@ -112,11 +112,11 @@ NAN_METHOD(Channel::New) {
     // Owned by the Channel object
     Utf8String host(info[0]);
     grpc_credentials *creds;
-    if (!Credentials::HasInstance(info[1])) {
+    if (!ChannelCredentials::HasInstance(info[1])) {
       return Nan::ThrowTypeError(
-          "Channel's second argument must be a credential");
+          "Channel's second argument must be a ChannelCredentials");
     }
-    Credentials *creds_object = ObjectWrap::Unwrap<Credentials>(
+    ChannelCredentials *creds_object = ObjectWrap::Unwrap<ChannelCredentials>(
         Nan::To<Object>(info[1]).ToLocalChecked());
     creds = creds_object->GetWrappedCredentials();
     grpc_channel_args *channel_args_ptr;

src/node/ext/channel_credentials.cc

@@ -36,7 +36,9 @@
 #include "grpc/grpc.h"
 #include "grpc/grpc_security.h"
 #include "grpc/support/log.h"
-#include "credentials.h"
+#include "channel_credentials.h"
+#include "call_credentials.h"
+#include "call.h"
 
 namespace grpc {
 namespace node {
@@ -60,51 +62,40 @@ using v8::Object;
 using v8::ObjectTemplate;
 using v8::Value;
 
-Nan::Callback *Credentials::constructor;
-Persistent<FunctionTemplate> Credentials::fun_tpl;
+Nan::Callback *ChannelCredentials::constructor;
+Persistent<FunctionTemplate> ChannelCredentials::fun_tpl;
 
-Credentials::Credentials(grpc_credentials *credentials)
+ChannelCredentials::ChannelCredentials(grpc_credentials *credentials)
     : wrapped_credentials(credentials) {}
 
-Credentials::~Credentials() {
+ChannelCredentials::~ChannelCredentials() {
   grpc_credentials_release(wrapped_credentials);
 }
 
-void Credentials::Init(Local<Object> exports) {
+void ChannelCredentials::Init(Local<Object> exports) {
   HandleScope scope;
   Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
-  tpl->SetClassName(Nan::New("Credentials").ToLocalChecked());
+  tpl->SetClassName(Nan::New("ChannelCredentials").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
+  Nan::SetPrototypeMethod(tpl, "compose", Compose);
   fun_tpl.Reset(tpl);
   Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
-  Nan::Set(ctr, Nan::New("createDefault").ToLocalChecked(),
-           Nan::GetFunction(
-               Nan::New<FunctionTemplate>(CreateDefault)).ToLocalChecked());
   Nan::Set(ctr, Nan::New("createSsl").ToLocalChecked(),
            Nan::GetFunction(
                Nan::New<FunctionTemplate>(CreateSsl)).ToLocalChecked());
-  Nan::Set(ctr, Nan::New("createComposite").ToLocalChecked(),
-           Nan::GetFunction(
-               Nan::New<FunctionTemplate>(CreateComposite)).ToLocalChecked());
-  Nan::Set(ctr, Nan::New("createGce").ToLocalChecked(),
-           Nan::GetFunction(
-               Nan::New<FunctionTemplate>(CreateGce)).ToLocalChecked());
-  Nan::Set(ctr, Nan::New("createIam").ToLocalChecked(),
-           Nan::GetFunction(
-               Nan::New<FunctionTemplate>(CreateIam)).ToLocalChecked());
   Nan::Set(ctr, Nan::New("createInsecure").ToLocalChecked(),
            Nan::GetFunction(
                Nan::New<FunctionTemplate>(CreateInsecure)).ToLocalChecked());
-  Nan::Set(exports, Nan::New("Credentials").ToLocalChecked(), ctr);
+  Nan::Set(exports, Nan::New("ChannelCredentials").ToLocalChecked(), ctr);
   constructor = new Nan::Callback(ctr);
 }
 
-bool Credentials::HasInstance(Local<Value> val) {
+bool ChannelCredentials::HasInstance(Local<Value> val) {
   HandleScope scope;
   return Nan::New(fun_tpl)->HasInstance(val);
 }
 
-Local<Value> Credentials::WrapStruct(grpc_credentials *credentials) {
+Local<Value> ChannelCredentials::WrapStruct(grpc_credentials *credentials) {
   EscapableHandleScope scope;
   const int argc = 1;
   Local<Value> argv[argc] = {
@@ -118,20 +109,20 @@ Local<Value> Credentials::WrapStruct(grpc_credentials *credentials) {
   }
 }
 
-grpc_credentials *Credentials::GetWrappedCredentials() {
+grpc_credentials *ChannelCredentials::GetWrappedCredentials() {
   return wrapped_credentials;
 }
 
-NAN_METHOD(Credentials::New) {
+NAN_METHOD(ChannelCredentials::New) {
   if (info.IsConstructCall()) {
     if (!info[0]->IsExternal()) {
       return Nan::ThrowTypeError(
-          "Credentials can only be created with the provided functions");
+          "ChannelCredentials can only be created with the provided functions");
     }
     Local<External> ext = info[0].As<External>();
     grpc_credentials *creds_value =
         reinterpret_cast<grpc_credentials *>(ext->Value());
-    Credentials *credentials = new Credentials(creds_value);
+    ChannelCredentials *credentials = new ChannelCredentials(creds_value);
     credentials->Wrap(info.This());
     info.GetReturnValue().Set(info.This());
     return;
@@ -149,16 +140,7 @@ NAN_METHOD(Credentials::New) {
   }
 }
 
-NAN_METHOD(Credentials::CreateDefault) {
-  grpc_credentials *creds = grpc_google_default_credentials_create();
-  if (creds == NULL) {
-    info.GetReturnValue().SetNull();
-  } else {
-    info.GetReturnValue().Set(WrapStruct(creds));
-  }
-}
-
-NAN_METHOD(Credentials::CreateSsl) {
+NAN_METHOD(ChannelCredentials::CreateSsl) {
   char *root_certs = NULL;
   grpc_ssl_pem_key_cert_pair key_cert_pair = {NULL, NULL};
   if (::node::Buffer::HasInstance(info[0])) {
@@ -188,49 +170,25 @@ NAN_METHOD(Credentials::CreateSsl) {
   }
 }
 
-NAN_METHOD(Credentials::CreateComposite) {
-  if (!HasInstance(info[0])) {
+NAN_METHOD(ChannelCredentials::Compose) {
+  if (!ChannelCredentials::HasInstance(info.This())) {
     return Nan::ThrowTypeError(
-        "createComposite's first argument must be a Credentials object");
+        "compose can only be called on ChannelCredentials objects");
   }
-  if (!HasInstance(info[1])) {
+  if (!CallCredentials::HasInstance(info[0])) {
     return Nan::ThrowTypeError(
-        "createComposite's second argument must be a Credentials object");
+        "compose's first argument must be a CallCredentials object");
   }
-  Credentials *creds1 = ObjectWrap::Unwrap<Credentials>(
+  ChannelCredentials *self = ObjectWrap::Unwrap<ChannelCredentials>(
+      info.This());
+  if (self->wrapped_credentials == NULL) {
+    return Nan::ThrowTypeError(
+        "Cannot compose insecure credential");
+  }
+  CallCredentials *other = ObjectWrap::Unwrap<CallCredentials>(
       Nan::To<Object>(info[0]).ToLocalChecked());
-  Credentials *creds2 = ObjectWrap::Unwrap<Credentials>(
-      Nan::To<Object>(info[1]).ToLocalChecked());
   grpc_credentials *creds = grpc_composite_credentials_create(
-      creds1->wrapped_credentials, creds2->wrapped_credentials, NULL);
-  if (creds == NULL) {
-    info.GetReturnValue().SetNull();
-  } else {
-    info.GetReturnValue().Set(WrapStruct(creds));
-  }
-}
-
-NAN_METHOD(Credentials::CreateGce) {
-  Nan::HandleScope scope;
-  grpc_credentials *creds = grpc_google_compute_engine_credentials_create(NULL);
-  if (creds == NULL) {
-    info.GetReturnValue().SetNull();
-  } else {
-    info.GetReturnValue().Set(WrapStruct(creds));
-  }
-}
-
-NAN_METHOD(Credentials::CreateIam) {
-  if (!info[0]->IsString()) {
-    return Nan::ThrowTypeError("createIam's first argument must be a string");
-  }
-  if (!info[1]->IsString()) {
-    return Nan::ThrowTypeError("createIam's second argument must be a string");
-  }
-  Utf8String auth_token(info[0]);
-  Utf8String auth_selector(info[1]);
-  grpc_credentials *creds =
-      grpc_google_iam_credentials_create(*auth_token, *auth_selector, NULL);
+      self->wrapped_credentials, other->GetWrappedCredentials(), NULL);
   if (creds == NULL) {
     info.GetReturnValue().SetNull();
   } else {
@@ -238,7 +196,7 @@ NAN_METHOD(Credentials::CreateIam) {
   }
 }
 
-NAN_METHOD(Credentials::CreateInsecure) {
+NAN_METHOD(ChannelCredentials::CreateInsecure) {
   info.GetReturnValue().Set(WrapStruct(NULL));
 }
 

src/node/ext/channel_credentials.h

@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef NET_GRPC_NODE_CREDENTIALS_H_
-#define NET_GRPC_NODE_CREDENTIALS_H_
+#ifndef NET_GRPC_NODE_CHANNEL_CREDENTIALS_H_
+#define NET_GRPC_NODE_CHANNEL_CREDENTIALS_H_
 
 #include <node.h>
 #include <nan.h>
@@ -43,7 +43,7 @@ namespace grpc {
 namespace node {
 
 /* Wrapper class for grpc_credentials structs */
-class Credentials : public Nan::ObjectWrap {
+class ChannelCredentials : public Nan::ObjectWrap {
  public:
   static void Init(v8::Local<v8::Object> exports);
   static bool HasInstance(v8::Local<v8::Value> val);
@@ -54,21 +54,18 @@ class Credentials : public Nan::ObjectWrap {
   grpc_credentials *GetWrappedCredentials();
 
  private:
-  explicit Credentials(grpc_credentials *credentials);
-  ~Credentials();
+  explicit ChannelCredentials(grpc_credentials *credentials);
+  ~ChannelCredentials();
 
   // Prevent copying
-  Credentials(const Credentials &);
-  Credentials &operator=(const Credentials &);
+  ChannelCredentials(const ChannelCredentials &);
+  ChannelCredentials &operator=(const ChannelCredentials &);
 
   static NAN_METHOD(New);
-  static NAN_METHOD(CreateDefault);
   static NAN_METHOD(CreateSsl);
-  static NAN_METHOD(CreateComposite);
-  static NAN_METHOD(CreateGce);
-  static NAN_METHOD(CreateFake);
-  static NAN_METHOD(CreateIam);
   static NAN_METHOD(CreateInsecure);
+
+  static NAN_METHOD(Compose);
   static Nan::Callback *constructor;
   // Used for typechecking instances of this javascript class
   static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
@@ -79,4 +76,4 @@ class Credentials : public Nan::ObjectWrap {
 }  // namespace node
 }  // namespace grpc
 
-#endif  // NET_GRPC_NODE_CREDENTIALS_H_
+#endif  // NET_GRPC_NODE_CHANNEL_CREDENTIALS_H_

src/node/ext/node_grpc.cc

@@ -37,10 +37,11 @@
 #include "grpc/grpc.h"
 
 #include "call.h"
+#include "call_credentials.h"
 #include "channel.h"
+#include "channel_credentials.h"
 #include "server.h"
 #include "completion_queue_async_worker.h"
-#include "credentials.h"
 #include "server_credentials.h"
 
 using v8::Local;
@@ -240,11 +241,12 @@ void init(Local<Object> exports) {
   InitWriteFlags(exports);
 
   grpc::node::Call::Init(exports);
+  grpc::node::CallCredentials::Init(exports);
   grpc::node::Channel::Init(exports);
+  grpc::node::ChannelCredentials::Init(exports);
   grpc::node::Server::Init(exports);
   grpc::node::CompletionQueueAsyncWorker::Init(exports);
-  grpc::node::Credentials::Init(exports);
   grpc::node::ServerCredentials::Init(exports);
 }
 
-NODE_MODULE(grpc, init)
+NODE_MODULE(grpc_node, init)

src/node/index.js

@@ -43,7 +43,7 @@ var server = require('./src/server.js');
 
 var Metadata = require('./src/metadata.js');
 
-var grpc = require('bindings')('grpc');
+var grpc = require('bindings')('grpc_node');
 
 /**
  * Load a gRPC object from an existing ProtoBuf.Reflect object.
@@ -90,36 +90,9 @@ exports.load = function load(filename, format) {
     default:
     throw new Error('Unrecognized format "' + format + '"');
   }
-
   return loadObject(builder.ns);
 };
 
-/**
- * Get a function that a client can use to update metadata with authentication
- * information from a Google Auth credential object, which comes from the
- * google-auth-library.
- * @param {Object} credential The credential object to use
- * @return {function(Object, callback)} Metadata updater function
- */
-exports.getGoogleAuthDelegate = function getGoogleAuthDelegate(credential) {
-  /**
-   * Update a metadata object with authentication information.
-   * @param {string} authURI The uri to authenticate to
-   * @param {Object} metadata Metadata object
-   * @param {function(Error, Object)} callback
-   */
-  return function updateMetadata(authURI, metadata, callback) {
-    credential.getRequestMetadata(authURI, function(err, header) {
-      if (err) {
-        callback(err);
-        return;
-      }
-      metadata.add('authorization', header.Authorization);
-      callback(null, metadata);
-    });
-  };
-};
-
 /**
  * @see module:src/server.Server
  */
@@ -153,7 +126,7 @@ exports.writeFlags = grpc.writeFlags;
 /**
  * Credentials factories
  */
-exports.Credentials = grpc.Credentials;
+exports.credentials = require('./src/credentials.js');
 
 /**
  * ServerCredentials factories

src/node/interop/empty.proto

@@ -1,43 +0,0 @@
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-syntax = "proto3";
-
-package grpc.testing;
-
-// An empty message that you can re-use to avoid defining duplicated empty
-// messages in your project. A typical example is to use it as argument or the
-// return value of a service API. For instance:
-//
-//   service Foo {
-//     rpc Bar (grpc.testing.Empty) returns (grpc.testing.Empty) { };
-//   };
-//
-message Empty {}

src/node/interop/interop_client.js

@@ -37,7 +37,9 @@ var fs = require('fs');
 var path = require('path');
 var _ = require('lodash');
 var grpc = require('..');
-var testProto = grpc.load(__dirname + '/test.proto').grpc.testing;
+var testProto = grpc.load({
+  root: __dirname + '/../../..',
+  file: 'test/proto/test.proto'}).grpc.testing;
 var GoogleAuth = require('google-auth-library');
 
 var assert = require('assert');
@@ -49,6 +51,9 @@ var AUTH_USER = ('155450119199-vefjjaekcc6cmsd5914v6lqufunmh9ue' +
 var COMPUTE_ENGINE_USER = ('155450119199-r5aaqa2vqoa9g5mv2m6s3m1l293rlmel' +
     '@developer.gserviceaccount.com');
 
+var ECHO_INITIAL_KEY = 'x-grpc-test-echo-initial';
+var ECHO_TRAILING_KEY = 'x-grpc-test-echo-trailing-bin';
+
 /**
  * Create a buffer filled with size zeroes
  * @param {number} size The length of the buffer
@@ -60,6 +65,27 @@ function zeroBuffer(size) {
   return zeros;
 }
 
+/**
+ * This is used for testing functions with multiple asynchronous calls that
+ * can happen in different orders. This should be passed the number of async
+ * function invocations that can occur last, and each of those should call this
+ * function's return value
+ * @param {function()} done The function that should be called when a test is
+ *     complete.
+ * @param {number} count The number of calls to the resulting function if the
+ *     test passes.
+ * @return {function()} The function that should be called at the end of each
+ *     sequence of asynchronous functions.
+ */
+function multiDone(done, count) {
+  return function() {
+    count -= 1;
+    if (count <= 0) {
+      done();
+    }
+  };
+}
+
 /**
  * Run the empty_unary test
  * @param {Client} client The client to test against
@@ -271,6 +297,54 @@ function timeoutOnSleepingServer(client, done) {
   });
 }
 
+function customMetadata(client, done) {
+  done = multiDone(done, 5);
+  var metadata = new grpc.Metadata();
+  metadata.set(ECHO_INITIAL_KEY, 'test_initial_metadata_value');
+  metadata.set(ECHO_TRAILING_KEY, new Buffer('ababab', 'hex'));
+  var arg = {
+    response_type: 'COMPRESSABLE',
+    response_size: 314159,
+    payload: {
+      body: zeroBuffer(271828)
+    }
+  };
+  var streaming_arg = {
+    payload: {
+      body: zeroBuffer(271828)
+    }
+  };
+  var unary = client.unaryCall(arg, function(err, resp) {
+    assert.ifError(err);
+    done();
+  }, metadata);
+  unary.on('metadata', function(metadata) {
+    assert.deepEqual(metadata.get(ECHO_INITIAL_KEY),
+                     ['test_initial_metadata_value']);
+    done();
+  });
+  unary.on('status', function(status) {
+    var echo_trailer = status.metadata.get(ECHO_TRAILING_KEY);
+    assert(echo_trailer.length > 0);
+    assert.strictEqual(echo_trailer[0].toString('hex'), 'ababab');
+    done();
+  });
+  var stream = client.fullDuplexCall(metadata);
+  stream.on('metadata', function(metadata) {
+    assert.deepEqual(metadata.get(ECHO_INITIAL_KEY),
+                     ['test_initial_metadata_value']);
+    done();
+  });
+  stream.on('status', function(status) {
+    var echo_trailer = status.metadata.get(ECHO_TRAILING_KEY);
+    assert(echo_trailer.length > 0);
+    assert.strictEqual(echo_trailer[0].toString('hex'), 'ababab');
+    done();
+  });
+  stream.write(streaming_arg);
+  stream.end();
+}
+
 /**
  * Run one of the authentication tests.
  * @param {string} expected_user The expected username in the response
@@ -280,33 +354,26 @@ function timeoutOnSleepingServer(client, done) {
  *     primarily for use with mocha
  */
 function authTest(expected_user, scope, client, done) {
-  (new GoogleAuth()).getApplicationDefault(function(err, credential) {
+  var arg = {
+    response_type: 'COMPRESSABLE',
+    response_size: 314159,
+    payload: {
+      body: zeroBuffer(271828)
+    },
+    fill_username: true,
+    fill_oauth_scope: true
+  };
+  client.unaryCall(arg, function(err, resp) {
     assert.ifError(err);
-    if (credential.createScopedRequired() && scope) {
-      credential = credential.createScoped(scope);
+    assert.strictEqual(resp.payload.type, 'COMPRESSABLE');
+    assert.strictEqual(resp.payload.body.length, 314159);
+    assert.strictEqual(resp.username, expected_user);
+    if (scope) {
+      assert.strictEqual(resp.oauth_scope, AUTH_SCOPE_RESPONSE);
+    }
+    if (done) {
+      done();
     }
-    client.$updateMetadata = grpc.getGoogleAuthDelegate(credential);
-    var arg = {
-      response_type: 'COMPRESSABLE',
-      response_size: 314159,
-      payload: {
-        body: zeroBuffer(271828)
-      },
-      fill_username: true,
-      fill_oauth_scope: true
-    };
-    client.unaryCall(arg, function(err, resp) {
-      assert.ifError(err);
-      assert.strictEqual(resp.payload.type, 'COMPRESSABLE');
-      assert.strictEqual(resp.payload.body.length, 314159);
-      assert.strictEqual(resp.username, expected_user);
-      if (scope) {
-        assert.strictEqual(resp.oauth_scope, AUTH_SCOPE_RESPONSE);
-      }
-      if (done) {
-        done();
-      }
-    });
   });
 }
 
@@ -345,24 +412,86 @@ function oauth2Test(expected_user, scope, per_rpc, client, done) {
   });
 }
 
+function perRpcAuthTest(expected_user, scope, per_rpc, client, done) {
+  (new GoogleAuth()).getApplicationDefault(function(err, credential) {
+    assert.ifError(err);
+    var arg = {
+      fill_username: true,
+      fill_oauth_scope: true
+    };
+    if (credential.createScopedRequired() && scope) {
+      credential = credential.createScoped(scope);
+    }
+    var creds = grpc.credentials.createFromGoogleCredential(credential);
+    client.unaryCall(arg, function(err, resp) {
+      assert.ifError(err);
+      assert.strictEqual(resp.username, expected_user);
+      assert.strictEqual(resp.oauth_scope, AUTH_SCOPE_RESPONSE);
+      if (done) {
+        done();
+      }
+    }, null, {credentials: creds});
+  });
+}
+
+function getApplicationCreds(scope, callback) {
+  (new GoogleAuth()).getApplicationDefault(function(err, credential) {
+    if (err) {
+      callback(err);
+      return;
+    }
+    if (credential.createScopedRequired() && scope) {
+      credential = credential.createScoped(scope);
+    }
+    callback(null, grpc.credentials.createFromGoogleCredential(credential));
+  });
+}
+
+function getOauth2Creds(scope, callback) {
+  (new GoogleAuth()).getApplicationDefault(function(err, credential) {
+    if (err) {
+      callback(err);
+      return;
+    }
+    credential = credential.createScoped(scope);
+    credential.getAccessToken(function(err, token) {
+      if (err) {
+        callback(err);
+        return;
+      }
+      var updateMd = function(service_url, callback) {
+        var metadata = new grpc.Metadata();
+        metadata.add('authorization', 'Bearer ' + token);
+        callback(null, metadata);
+      };
+      callback(null, grpc.credentials.createFromMetadataGenerator(updateMd));
+    });
+  });
+}
+
 /**
  * Map from test case names to test functions
  */
 var test_cases = {
-  empty_unary: emptyUnary,
-  large_unary: largeUnary,
-  client_streaming: clientStreaming,
-  server_streaming: serverStreaming,
-  ping_pong: pingPong,
-  empty_stream: emptyStream,
-  cancel_after_begin: cancelAfterBegin,
-  cancel_after_first_response: cancelAfterFirstResponse,
-  timeout_on_sleeping_server: timeoutOnSleepingServer,
-  compute_engine_creds: _.partial(authTest, COMPUTE_ENGINE_USER, null),
-  service_account_creds: _.partial(authTest, AUTH_USER, AUTH_SCOPE),
-  jwt_token_creds: _.partial(authTest, AUTH_USER, null),
-  oauth2_auth_token: _.partial(oauth2Test, AUTH_USER, AUTH_SCOPE, false),
-  per_rpc_creds: _.partial(oauth2Test, AUTH_USER, AUTH_SCOPE, true)
+  empty_unary: {run: emptyUnary},
+  large_unary: {run: largeUnary},
+  client_streaming: {run: clientStreaming},
+  server_streaming: {run: serverStreaming},
+  ping_pong: {run: pingPong},
+  empty_stream: {run: emptyStream},
+  cancel_after_begin: {run: cancelAfterBegin},
+  cancel_after_first_response: {run: cancelAfterFirstResponse},
+  timeout_on_sleeping_server: {run: timeoutOnSleepingServer},
+  custom_metadata: {run: customMetadata},
+  compute_engine_creds: {run: _.partial(authTest, COMPUTE_ENGINE_USER, null),
+                         getCreds: _.partial(getApplicationCreds, null)},
+  service_account_creds: {run: _.partial(authTest, AUTH_USER, AUTH_SCOPE),
+                          getCreds: _.partial(getApplicationCreds, AUTH_SCOPE)},
+  jwt_token_creds: {run: _.partial(authTest, AUTH_USER, null),
+                    getCreds: _.partial(getApplicationCreds, null)},
+  oauth2_auth_token: {run: _.partial(oauth2Test, AUTH_USER, AUTH_SCOPE, false),
+                      getCreds: _.partial(getOauth2Creds, AUTH_SCOPE)},
+  per_rpc_creds: {run: _.partial(perRpcAuthTest, AUTH_USER, AUTH_SCOPE, true)}
 };
 
 /**
@@ -388,17 +517,30 @@ function runTest(address, host_override, test_case, tls, test_ca, done) {
       ca_path = process.env.SSL_CERT_FILE;
     }
     var ca_data = fs.readFileSync(ca_path);
-    creds = grpc.Credentials.createSsl(ca_data);
+    creds = grpc.credentials.createSsl(ca_data);
     if (host_override) {
       options['grpc.ssl_target_name_override'] = host_override;
       options['grpc.default_authority'] = host_override;
     }
   } else {
-    creds = grpc.Credentials.createInsecure();
+    creds = grpc.credentials.createInsecure();
   }
-  var client = new testProto.TestService(address, creds, options);
+  var test = test_cases[test_case];
 
-  test_cases[test_case](client, done);
+  var execute = function(err, creds) {
+    assert.ifError(err);
+    var client = new testProto.TestService(address, creds, options);
+    test.run(client, done);
+  };
+
+  if (test.getCreds) {
+    test.getCreds(function(err, new_creds) {
+      execute(err, grpc.credentials.combineChannelCredentials(
+          creds, new_creds));
+    });
+  } else {
+    execute(null, creds);
+  }
 }
 
 if (require.main === module) {

src/node/interop/interop_server.js

@@ -37,7 +37,12 @@ var fs = require('fs');
 var path = require('path');
 var _ = require('lodash');
 var grpc = require('..');
-var testProto = grpc.load(__dirname + '/test.proto').grpc.testing;
+var testProto = grpc.load({
+  root: __dirname + '/../../..',
+  file: 'test/proto/test.proto'}).grpc.testing;
+
+var ECHO_INITIAL_KEY = 'x-grpc-test-echo-initial';
+var ECHO_TRAILING_KEY = 'x-grpc-test-echo-trailing-bin';
 
 /**
  * Create a buffer filled with size zeroes
@@ -50,6 +55,34 @@ function zeroBuffer(size) {
   return zeros;
 }
 
+/**
+ * Echos a header metadata item as specified in the interop spec.
+ * @param {Call} call The call to echo metadata on
+ */
+function echoHeader(call) {
+  var echo_initial = call.metadata.get(ECHO_INITIAL_KEY);
+  if (echo_initial.length > 0) {
+    var response_metadata = new grpc.Metadata();
+    response_metadata.set(ECHO_INITIAL_KEY, echo_initial[0]);
+    call.sendMetadata(response_metadata);
+  }
+}
+
+/**
+ * Gets the trailer metadata that should be echoed when the call is done,
+ * as specified in the interop spec.
+ * @param {Call} call The call to get metadata from
+ * @return {grpc.Metadata} The metadata to send as a trailer
+ */
+function getEchoTrailer(call) {
+  var echo_trailer = call.metadata.get(ECHO_TRAILING_KEY);
+  var response_trailer = new grpc.Metadata();
+  if (echo_trailer.length > 0) {
+    response_trailer.set(ECHO_TRAILING_KEY, echo_trailer[0]);
+  }
+  return response_trailer;
+}
+
 /**
  * Respond to an empty parameter with an empty response.
  * NOTE: this currently does not work due to issue #137
@@ -58,7 +91,8 @@ function zeroBuffer(size) {
  *     or error
  */
 function handleEmpty(call, callback) {
-  callback(null, {});
+  echoHeader(call);
+  callback(null, {}, getEchoTrailer(call));
 }
 
 /**
@@ -68,6 +102,7 @@ function handleEmpty(call, callback) {
  *     error
  */
 function handleUnary(call, callback) {
+  echoHeader(call);
   var req = call.request;
   var zeros = zeroBuffer(req.response_size);
   var payload_type = req.response_type;
@@ -75,7 +110,8 @@ function handleUnary(call, callback) {
     payload_type = ['COMPRESSABLE',
                     'UNCOMPRESSABLE'][Math.random() < 0.5 ? 0 : 1];
   }
-  callback(null, {payload: {type: payload_type, body: zeros}});
+  callback(null, {payload: {type: payload_type, body: zeros}},
+           getEchoTrailer(call));
 }
 
 /**
@@ -85,12 +121,14 @@ function handleUnary(call, callback) {
  *     error
  */
 function handleStreamingInput(call, callback) {
+  echoHeader(call);
   var aggregate_size = 0;
   call.on('data', function(value) {
     aggregate_size += value.payload.body.length;
   });
   call.on('end', function() {
-    callback(null, {aggregated_payload_size: aggregate_size});
+    callback(null, {aggregated_payload_size: aggregate_size},
+             getEchoTrailer(call));
   });
 }
 
@@ -99,6 +137,7 @@ function handleStreamingInput(call, callback) {
  * @param {Call} call Call to handle
  */
 function handleStreamingOutput(call) {
+  echoHeader(call);
   var req = call.request;
   var payload_type = req.response_type;
   if (payload_type === 'RANDOM') {
@@ -113,7 +152,7 @@ function handleStreamingOutput(call) {
       }
     });
   });
-  call.end();
+  call.end(getEchoTrailer(call));
 }
 
 /**
@@ -122,6 +161,7 @@ function handleStreamingOutput(call) {
  * @param {Call} call Call to handle
  */
 function handleFullDuplex(call) {
+  echoHeader(call);
   call.on('data', function(value) {
     var payload_type = value.response_type;
     if (payload_type === 'RANDOM') {
@@ -138,7 +178,7 @@ function handleFullDuplex(call) {
     });
   });
   call.on('end', function() {
-    call.end();
+    call.end(getEchoTrailer(call));
   });
 }
 

src/node/interop/messages.proto

@@ -1,132 +0,0 @@
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Message definitions to be used by integration test service definitions.
-
-syntax = "proto3";
-
-package grpc.testing;
-
-// The type of payload that should be returned.
-enum PayloadType {
-  // Compressable text format.
-  COMPRESSABLE = 0;
-
-  // Uncompressable binary format.
-  UNCOMPRESSABLE = 1;
-
-  // Randomly chosen from all other formats defined in this enum.
-  RANDOM = 2;
-}
-
-// A block of data, to simply increase gRPC message size.
-message Payload {
-  // The type of data in body.
-  PayloadType type = 1;
-  // Primary contents of payload.
-  bytes body = 2;
-}
-
-// Unary request.
-message SimpleRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, server randomly chooses one from other formats.
-  PayloadType response_type = 1;
-
-  // Desired payload size in the response from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
-  int32 response_size = 2;
-
-  // Optional input payload sent along with the request.
-  Payload payload = 3;
-
-  // Whether SimpleResponse should include username.
-  bool fill_username = 4;
-
-  // Whether SimpleResponse should include OAuth scope.
-  bool fill_oauth_scope = 5;
-}
-
-// Unary response, as configured by the request.
-message SimpleResponse {
-  // Payload to increase message size.
-  Payload payload = 1;
-  // The user the request came from, for verifying authentication was
-  // successful when the client expected it.
-  string username = 2;
-  // OAuth scope.
-  string oauth_scope = 3;
-}
-
-// Client-streaming request.
-message StreamingInputCallRequest {
-  // Optional input payload sent along with the request.
-  Payload payload = 1;
-
-  // Not expecting any payload from the response.
-}
-
-// Client-streaming response.
-message StreamingInputCallResponse {
-  // Aggregated size of payloads received from the client.
-  int32 aggregated_payload_size = 1;
-}
-
-// Configuration for a particular response.
-message ResponseParameters {
-  // Desired payload sizes in responses from the server.
-  // If response_type is COMPRESSABLE, this denotes the size before compression.
-  int32 size = 1;
-
-  // Desired interval between consecutive responses in the response stream in
-  // microseconds.
-  int32 interval_us = 2;
-}
-
-// Server-streaming request.
-message StreamingOutputCallRequest {
-  // Desired payload type in the response from the server.
-  // If response_type is RANDOM, the payload from each response in the stream
-  // might be of different types. This is to simulate a mixed type of payload
-  // stream.
-  PayloadType response_type = 1;
-
-  // Configuration for each expected response message.
-  repeated ResponseParameters response_parameters = 2;
-
-  // Optional input payload sent along with the request.
-  Payload payload = 3;
-}
-
-// Server-streaming response, as configured by the request and parameters.
-message StreamingOutputCallResponse {
-  // Payload to increase response size.
-  Payload payload = 1;
-}

src/node/interop/test.proto

@@ -1,72 +0,0 @@
-
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// An integration test service that covers all the method signature permutations
-// of unary/streaming requests/responses.
-
-syntax = "proto3";
-
-import "empty.proto";
-import "messages.proto";
-
-package grpc.testing;
-
-// A simple service to test the various types of RPCs and experiment with
-// performance with various types of payload.
-service TestService {
-  // One empty request followed by one empty response.
-  rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
-
-  // One request followed by one response.
-  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
-
-  // One request followed by a sequence of responses (streamed download).
-  // The server returns the payload with client desired type and sizes.
-  rpc StreamingOutputCall(StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-
-  // A sequence of requests followed by one response (streamed upload).
-  // The server returns the aggregated size of client payload as the result.
-  rpc StreamingInputCall(stream StreamingInputCallRequest)
-      returns (StreamingInputCallResponse);
-
-  // A sequence of requests with each request served by the server immediately.
-  // As one request could lead to multiple responses, this interface
-  // demonstrates the idea of full duplexing.
-  rpc FullDuplexCall(stream StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-
-  // A sequence of requests followed by a sequence of responses.
-  // The server buffers all the client requests and then serves them in order. A
-  // stream of responses are returned to the client when the server starts with
-  // first request.
-  rpc HalfDuplexCall(stream StreamingOutputCallRequest)
-      returns (stream StreamingOutputCallResponse);
-}

src/node/performance/perf_test.js

@@ -42,7 +42,7 @@ function runTest(iterations, callback) {
   var testServer = interop_server.getServer(0, false);
   testServer.server.start();
   var client = new testProto.TestService('localhost:' + testServer.port,
-                                         grpc.Credentials.createInsecure());
+                                         grpc.credentials.createInsecure());
 
   function runIterations(finish) {
     var start = process.hrtime();