Merge github.com:grpc/grpc into backoff_lib

Makefile

@@ -849,6 +849,8 @@ chttp2_status_conversion_test: $(BINDIR)/$(CONFIG)/chttp2_status_conversion_test
 chttp2_stream_map_test: $(BINDIR)/$(CONFIG)/chttp2_stream_map_test
 chttp2_varint_test: $(BINDIR)/$(CONFIG)/chttp2_varint_test
 compression_test: $(BINDIR)/$(CONFIG)/compression_test
+concurrent_connectivity_test: $(BINDIR)/$(CONFIG)/concurrent_connectivity_test
+dns_resolver_connectivity_test: $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test
 dns_resolver_test: $(BINDIR)/$(CONFIG)/dns_resolver_test
 dualstack_socket_test: $(BINDIR)/$(CONFIG)/dualstack_socket_test
 endpoint_pair_test: $(BINDIR)/$(CONFIG)/endpoint_pair_test
@@ -1160,6 +1162,8 @@ buildtests_c: privatelibs_c \
   $(BINDIR)/$(CONFIG)/chttp2_stream_map_test \
   $(BINDIR)/$(CONFIG)/chttp2_varint_test \
   $(BINDIR)/$(CONFIG)/compression_test \
+  $(BINDIR)/$(CONFIG)/concurrent_connectivity_test \
+  $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test \
   $(BINDIR)/$(CONFIG)/dns_resolver_test \
   $(BINDIR)/$(CONFIG)/dualstack_socket_test \
   $(BINDIR)/$(CONFIG)/endpoint_pair_test \
@@ -1404,6 +1408,10 @@ test_c: buildtests_c
 	$(Q) $(BINDIR)/$(CONFIG)/chttp2_varint_test || ( echo test chttp2_varint_test failed ; exit 1 )
 	$(E) "[RUN]     Testing compression_test"
 	$(Q) $(BINDIR)/$(CONFIG)/compression_test || ( echo test compression_test failed ; exit 1 )
+	$(E) "[RUN]     Testing concurrent_connectivity_test"
+	$(Q) $(BINDIR)/$(CONFIG)/concurrent_connectivity_test || ( echo test concurrent_connectivity_test failed ; exit 1 )
+	$(E) "[RUN]     Testing dns_resolver_connectivity_test"
+	$(Q) $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test || ( echo test dns_resolver_connectivity_test failed ; exit 1 )
 	$(E) "[RUN]     Testing dns_resolver_test"
 	$(Q) $(BINDIR)/$(CONFIG)/dns_resolver_test || ( echo test dns_resolver_test failed ; exit 1 )
 	$(E) "[RUN]     Testing dualstack_socket_test"
@@ -6080,6 +6088,70 @@ endif
 endif
 
 
+CONCURRENT_CONNECTIVITY_TEST_SRC = \
+    test/core/surface/concurrent_connectivity_test.c \
+
+CONCURRENT_CONNECTIVITY_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(CONCURRENT_CONNECTIVITY_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/concurrent_connectivity_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/concurrent_connectivity_test: $(CONCURRENT_CONNECTIVITY_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(CONCURRENT_CONNECTIVITY_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/concurrent_connectivity_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/surface/concurrent_connectivity_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_concurrent_connectivity_test: $(CONCURRENT_CONNECTIVITY_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(CONCURRENT_CONNECTIVITY_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
+DNS_RESOLVER_CONNECTIVITY_TEST_SRC = \
+    test/core/client_config/resolvers/dns_resolver_connectivity_test.c \
+
+DNS_RESOLVER_CONNECTIVITY_TEST_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(DNS_RESOLVER_CONNECTIVITY_TEST_SRC))))
+ifeq ($(NO_SECURE),true)
+
+# You can't build secure targets if you don't have OpenSSL.
+
+$(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test: openssl_dep_error
+
+else
+
+
+
+$(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test: $(DNS_RESOLVER_CONNECTIVITY_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+	$(E) "[LD]      Linking $@"
+	$(Q) mkdir -p `dirname $@`
+	$(Q) $(LD) $(LDFLAGS) $(DNS_RESOLVER_CONNECTIVITY_TEST_OBJS) $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a $(LDLIBS) $(LDLIBS_SECURE) -o $(BINDIR)/$(CONFIG)/dns_resolver_connectivity_test
+
+endif
+
+$(OBJDIR)/$(CONFIG)/test/core/client_config/resolvers/dns_resolver_connectivity_test.o:  $(LIBDIR)/$(CONFIG)/libgrpc_test_util.a $(LIBDIR)/$(CONFIG)/libgrpc.a $(LIBDIR)/$(CONFIG)/libgpr_test_util.a $(LIBDIR)/$(CONFIG)/libgpr.a
+
+deps_dns_resolver_connectivity_test: $(DNS_RESOLVER_CONNECTIVITY_TEST_OBJS:.o=.dep)
+
+ifneq ($(NO_SECURE),true)
+ifneq ($(NO_DEPS),true)
+-include $(DNS_RESOLVER_CONNECTIVITY_TEST_OBJS:.o=.dep)
+endif
+endif
+
+
 DNS_RESOLVER_TEST_SRC = \
     test/core/client_config/resolvers/dns_resolver_test.c \
 

build.yaml

@@ -1059,6 +1059,27 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
+- name: concurrent_connectivity_test
+  build: test
+  language: c
+  src:
+  - test/core/surface/concurrent_connectivity_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
+- name: dns_resolver_connectivity_test
+  cpu_cost: 0.1
+  build: test
+  language: c
+  src:
+  - test/core/client_config/resolvers/dns_resolver_connectivity_test.c
+  deps:
+  - grpc_test_util
+  - grpc
+  - gpr_test_util
+  - gpr
 - name: dns_resolver_test
   build: test
   language: c

composer.json

@@ -2,13 +2,20 @@
   "name": "grpc/grpc",
   "type": "library",
   "description": "gRPC library for PHP",
-  "version": "0.6.0",
+  "version": "0.14.0",
   "keywords": ["rpc"],
   "homepage": "http://grpc.io",
   "license": "BSD-3-Clause",
+  "repositories": [
+    {
+      "type": "vcs",
+      "url": "https://github.com/stanley-cheung/Protobuf-PHP"
+    }
+  ],
   "require": {
     "php": ">=5.5.0",
-    "google/auth": "dev-master"
+    "datto/protobuf-php": "dev-master",
+    "google/auth": "v0.7"
   },
   "autoload": {
     "psr-4": {

examples/php/composer.json

@@ -1,17 +1,14 @@
 {
+  "name": "grpc/grpc-demo",
+  "description": "gRPC example for PHP",
+  "minimum-stability": "dev",
   "repositories": [
     {
       "type": "vcs",
       "url": "https://github.com/stanley-cheung/Protobuf-PHP"
     }
   ],
-  "name": "grpc/grpc-demo",
-  "description": "gRPC example for PHP",
-  "minimum-stability": "dev",
   "require": {
-    "php": ">=5.5.0",
-    "datto/protobuf-php": "dev-master",
-    "google/auth": "dev-master",
-    "grpc/grpc": "dev-release-0_11"
+    "grpc/grpc": "dev-release-0_13"
   }
 }

examples/php/greeter_client.php

@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,7 +36,9 @@ require dirname(__FILE__) . '/vendor/autoload.php';
 require dirname(__FILE__) . '/helloworld.php';
 
 function greet($name) {
-  $client = new helloworld\GreeterClient('localhost:50051', []);
+  $client = new helloworld\GreeterClient('localhost:50051', [
+    'credentials' => Grpc\ChannelCredentials::createInsecure()
+  ]);
   $request = new helloworld\HelloRequest();
   $request->setName($name);
   list($reply, $status) = $client->SayHello($request)->wait();

examples/php/route_guide/route_guide_client.php

@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,7 +37,9 @@ require dirname(__FILE__) . '/route_guide.php';
 
 define('COORD_FACTOR', 1e7);
 
-$client = new routeguide\RouteGuideClient('localhost:50051', []);
+$client = new routeguide\RouteGuideClient('localhost:50051', [
+  'credentials' => Grpc\ChannelCredentials::createInsecure()
+]);
 
 function printFeature($feature) {
   $name = $feature->getName();

include/grpc++/impl/codegen/completion_queue.h

@@ -184,6 +184,7 @@ class CompletionQueue : private GrpcLibrary {
   bool Pluck(CompletionQueueTag* tag);
 
   /// Performs a single polling pluck on \a tag.
+  /// \warning Must not be mixed with calls to \a Next.
   void TryPluck(CompletionQueueTag* tag);
 
   grpc_completion_queue* cq_;  // owned

include/grpc++/impl/codegen/server_context.h

@@ -103,6 +103,9 @@ class ServerContext {
   void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
   void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
 
+  // IsCancelled is always safe to call when using sync API
+  // When using async API, it is only safe to call IsCancelled after
+  // the AsyncNotifyWhenDone tag has been delivered
   bool IsCancelled() const;
 
   // Cancel the Call from the server. This is a best-effort API and depending on

package.xml

@@ -27,9 +27,9 @@
  <contents>
   <dir baseinstalldir="/" name="/">
     <file baseinstalldir="/" name="config.m4" role="src" />
+    <file baseinstalldir="/" name="src/php/README.md" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/CREDITS" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/LICENSE" role="src" />
-    <file baseinstalldir="/" name="src/php/ext/grpc/README.md" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/byte_buffer.c" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/call.c" role="src" />
     <file baseinstalldir="/" name="src/php/ext/grpc/call_credentials.c" role="src" />

src/core/client_config/client_config.c

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -53,7 +53,9 @@ void grpc_client_config_ref(grpc_client_config *c) { gpr_ref(&c->refs); }
 
 void grpc_client_config_unref(grpc_exec_ctx *exec_ctx, grpc_client_config *c) {
   if (gpr_unref(&c->refs)) {
-    GRPC_LB_POLICY_UNREF(exec_ctx, c->lb_policy, "client_config");
+    if (c->lb_policy != NULL) {
+      GRPC_LB_POLICY_UNREF(exec_ctx, c->lb_policy, "client_config");
+    }
     gpr_free(c);
   }
 }

src/core/client_config/lb_policies/pick_first.c

@@ -387,8 +387,8 @@ static void pick_first_factory_unref(grpc_lb_policy_factory *factory) {}
 
 static grpc_lb_policy *create_pick_first(grpc_lb_policy_factory *factory,
                                          grpc_lb_policy_args *args) {
+  if (args->num_subchannels == 0) return NULL;
   pick_first_lb_policy *p = gpr_malloc(sizeof(*p));
-  GPR_ASSERT(args->num_subchannels > 0);
   memset(p, 0, sizeof(*p));
   grpc_lb_policy_init(&p->base, &pick_first_lb_policy_vtable);
   p->subchannels =

src/core/client_config/resolvers/dns_resolver.c

@@ -41,6 +41,7 @@
 
 #include "src/core/client_config/lb_policy_registry.h"
 #include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/timer.h"
 #include "src/core/support/string.h"
 
 typedef struct {
@@ -71,6 +72,9 @@ typedef struct {
   grpc_client_config **target_config;
   /** current (fully resolved) config */
   grpc_client_config *resolved_config;
+  /** retry timer */
+  bool have_retry_timer;
+  grpc_timer retry_timer;
 } dns_resolver;
 
 static void dns_destroy(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
@@ -91,6 +95,9 @@ static const grpc_resolver_vtable dns_resolver_vtable = {
 static void dns_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver) {
   dns_resolver *r = (dns_resolver *)resolver;
   gpr_mu_lock(&r->mu);
+  if (r->have_retry_timer) {
+    grpc_timer_cancel(exec_ctx, &r->retry_timer);
+  }
   if (r->next_completion != NULL) {
     *r->target_config = NULL;
     grpc_exec_ctx_enqueue(exec_ctx, r->next_completion, true, NULL);
@@ -125,6 +132,22 @@ static void dns_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
   gpr_mu_unlock(&r->mu);
 }
 
+static void dns_on_retry_timer(grpc_exec_ctx *exec_ctx, void *arg,
+                               bool success) {
+  dns_resolver *r = arg;
+
+  gpr_mu_lock(&r->mu);
+  r->have_retry_timer = false;
+  if (success) {
+    if (!r->resolving) {
+      dns_start_resolving_locked(r);
+    }
+  }
+  gpr_mu_unlock(&r->mu);
+
+  GRPC_RESOLVER_UNREF(exec_ctx, &r->base, "retry-timer");
+}
+
 static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
                             grpc_resolved_addresses *addresses) {
   dns_resolver *r = arg;
@@ -133,29 +156,47 @@ static void dns_on_resolved(grpc_exec_ctx *exec_ctx, void *arg,
   grpc_subchannel_args args;
   grpc_lb_policy *lb_policy;
   size_t i;
-  if (addresses) {
+  gpr_mu_lock(&r->mu);
+  GPR_ASSERT(r->resolving);
+  r->resolving = 0;
+  if (addresses != NULL) {
     grpc_lb_policy_args lb_policy_args;
     config = grpc_client_config_create();
     subchannels = gpr_malloc(sizeof(grpc_subchannel *) * addresses->naddrs);
+    size_t naddrs = 0;
     for (i = 0; i < addresses->naddrs; i++) {
       memset(&args, 0, sizeof(args));
       args.addr = (struct sockaddr *)(addresses->addrs[i].addr);
       args.addr_len = (size_t)addresses->addrs[i].len;
-      subchannels[i] = grpc_subchannel_factory_create_subchannel(
+      grpc_subchannel *subchannel = grpc_subchannel_factory_create_subchannel(
           exec_ctx, r->subchannel_factory, &args);
+      if (subchannel != NULL) {
+        subchannels[naddrs++] = subchannel;
+      }
     }
     memset(&lb_policy_args, 0, sizeof(lb_policy_args));
     lb_policy_args.subchannels = subchannels;
-    lb_policy_args.num_subchannels = addresses->naddrs;
+    lb_policy_args.num_subchannels = naddrs;
     lb_policy = grpc_lb_policy_create(r->lb_policy_name, &lb_policy_args);
-    grpc_client_config_set_lb_policy(config, lb_policy);
-    GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
+    if (lb_policy != NULL) {
+      grpc_client_config_set_lb_policy(config, lb_policy);
+      GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "construction");
+    }
     grpc_resolved_addresses_destroy(addresses);
     gpr_free(subchannels);
+  } else {
+    int retry_seconds = 15;
+    gpr_log(GPR_DEBUG, "dns resolution failed: retrying in %d seconds",
+            retry_seconds);
+    GPR_ASSERT(!r->have_retry_timer);
+    r->have_retry_timer = true;
+    gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
+    GRPC_RESOLVER_REF(&r->base, "retry-timer");
+    grpc_timer_init(
+        exec_ctx, &r->retry_timer,
+        gpr_time_add(now, gpr_time_from_seconds(retry_seconds, GPR_TIMESPAN)),
+        dns_on_retry_timer, r, now);
   }
-  gpr_mu_lock(&r->mu);
-  GPR_ASSERT(r->resolving);
-  r->resolving = 0;
   if (r->resolved_config) {
     grpc_client_config_unref(exec_ctx, r->resolved_config);
   }

src/core/client_config/subchannel.c

@@ -519,7 +519,8 @@ void grpc_connected_subchannel_ping(grpc_exec_ctx *exec_ctx,
   elem->filter->start_transport_op(exec_ctx, elem, &op);
 }
 
-static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
+static void publish_transport_locked(grpc_exec_ctx *exec_ctx,
+                                     grpc_subchannel *c) {
   size_t channel_stack_size;
   grpc_connected_subchannel *con;
   grpc_channel_stack *stk;
@@ -555,8 +556,6 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
   grpc_closure_init(&sw_subchannel->closure, subchannel_on_child_state_changed,
                     sw_subchannel);
 
-  gpr_mu_lock(&c->mu);
-
   if (c->disconnected) {
     gpr_mu_unlock(&c->mu);
     gpr_free(sw_subchannel);
@@ -589,7 +588,6 @@ static void publish_transport(grpc_exec_ctx *exec_ctx, grpc_subchannel *c) {
   grpc_connectivity_state_set(exec_ctx, &c->state_tracker, GRPC_CHANNEL_READY,
                               "connected");
 
-  gpr_mu_unlock(&c->mu);
   gpr_free((void *)filters);
 }
 
@@ -615,21 +613,23 @@ static void subchannel_connected(grpc_exec_ctx *exec_ctx, void *arg,
                                  bool iomgr_success) {
   grpc_subchannel *c = arg;
 
+  GRPC_SUBCHANNEL_WEAK_REF(c, "connected");
+  gpr_mu_lock(&c->mu);
   if (c->connecting_result.transport != NULL) {
-    publish_transport(exec_ctx, c);
+    publish_transport_locked(exec_ctx, c);
   } else if (c->disconnected) {
     GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
   } else {
     gpr_timespec now = gpr_now(GPR_CLOCK_MONOTONIC);
-    gpr_mu_lock(&c->mu);
     GPR_ASSERT(!c->have_alarm);
     c->have_alarm = 1;
     grpc_connectivity_state_set(exec_ctx, &c->state_tracker,
                                 GRPC_CHANNEL_TRANSIENT_FAILURE,
                                 "connect_failed");
     grpc_timer_init(exec_ctx, &c->alarm, c->next_attempt, on_alarm, c, now);
-    gpr_mu_unlock(&c->mu);
   }
+  gpr_mu_unlock(&c->mu);
+  GRPC_SUBCHANNEL_WEAK_UNREF(exec_ctx, c, "connecting");
 }
 
 /*

src/core/iomgr/iocp_windows.c

@@ -71,7 +71,8 @@ static DWORD deadline_to_millis_timeout(gpr_timespec deadline,
       timeout, gpr_time_from_nanos(GPR_NS_PER_MS - 1, GPR_TIMESPAN)));
 }
 
-void grpc_iocp_work(grpc_exec_ctx *exec_ctx, gpr_timespec deadline) {
+grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
+                                     gpr_timespec deadline) {
   BOOL success;
   DWORD bytes = 0;
   DWORD flags = 0;
@@ -84,14 +85,14 @@ void grpc_iocp_work(grpc_exec_ctx *exec_ctx, gpr_timespec deadline) {
       g_iocp, &bytes, &completion_key, &overlapped,
       deadline_to_millis_timeout(deadline, gpr_now(deadline.clock_type)));
   if (success == 0 && overlapped == NULL) {
-    return;
+    return GRPC_IOCP_WORK_TIMEOUT;
   }
   GPR_ASSERT(completion_key && overlapped);
   if (overlapped == &g_iocp_custom_overlap) {
     gpr_atm_full_fetch_add(&g_custom_events, -1);
     if (completion_key == (ULONG_PTR)&g_iocp_kick_token) {
       /* We were awoken from a kick. */
-      return;
+      return GRPC_IOCP_WORK_KICK;
     }
     gpr_log(GPR_ERROR, "Unknown custom completion key.");
     abort();
@@ -121,6 +122,7 @@ void grpc_iocp_work(grpc_exec_ctx *exec_ctx, gpr_timespec deadline) {
   }
   gpr_mu_unlock(&socket->state_mu);
   grpc_exec_ctx_enqueue(exec_ctx, closure, true, NULL);
+  return GRPC_IOCP_WORK_WORK;
 }
 
 void grpc_iocp_init(void) {
@@ -140,10 +142,12 @@ void grpc_iocp_kick(void) {
 
 void grpc_iocp_flush(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_iocp_work_status work_status;
 
   do {
-    grpc_iocp_work(&exec_ctx, gpr_inf_past(GPR_CLOCK_MONOTONIC));
-  } while (grpc_exec_ctx_flush(&exec_ctx));
+    work_status = grpc_iocp_work(&exec_ctx, gpr_inf_past(GPR_CLOCK_MONOTONIC));
+  } while (work_status == GRPC_IOCP_WORK_KICK ||
+           grpc_exec_ctx_flush(&exec_ctx));
 }
 
 void grpc_iocp_shutdown(void) {

src/core/iomgr/iocp_windows.h

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,7 +38,14 @@
 
 #include "src/core/iomgr/socket_windows.h"
 
-void grpc_iocp_work(grpc_exec_ctx *exec_ctx, gpr_timespec deadline);
+typedef enum {
+  GRPC_IOCP_WORK_WORK,
+  GRPC_IOCP_WORK_TIMEOUT,
+  GRPC_IOCP_WORK_KICK
+} grpc_iocp_work_status;
+
+grpc_iocp_work_status grpc_iocp_work(grpc_exec_ctx *exec_ctx,
+                                     gpr_timespec deadline);
 void grpc_iocp_init(void);
 void grpc_iocp_kick(void);
 void grpc_iocp_flush(void);

src/core/iomgr/resolve_address.h

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -66,7 +66,7 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addresses);
 
 /* Resolve addr in a blocking fashion. Returns NULL on failure. On success,
    result must be freed with grpc_resolved_addresses_destroy. */
-grpc_resolved_addresses *grpc_blocking_resolve_address(
-    const char *addr, const char *default_port);
+extern grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+    const char *name, const char *default_port);
 
 #endif /* GRPC_INTERNAL_CORE_IOMGR_RESOLVE_ADDRESS_H */

src/core/iomgr/resolve_address_posix.c

@@ -34,18 +34,13 @@
 #include <grpc/support/port_platform.h>
 #ifdef GPR_POSIX_SOCKET
 
-#include "src/core/iomgr/sockaddr.h"
 #include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/sockaddr.h"
 
+#include <string.h>
 #include <sys/types.h>
 #include <sys/un.h>
-#include <string.h>
 
-#include "src/core/iomgr/executor.h"
-#include "src/core/iomgr/iomgr_internal.h"
-#include "src/core/iomgr/sockaddr_utils.h"
-#include "src/core/support/block_annotate.h"
-#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
@@ -53,6 +48,11 @@
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
+#include "src/core/iomgr/executor.h"
+#include "src/core/iomgr/iomgr_internal.h"
+#include "src/core/iomgr/sockaddr_utils.h"
+#include "src/core/support/block_annotate.h"
+#include "src/core/support/string.h"
 
 typedef struct {
   char *name;
@@ -62,7 +62,7 @@ typedef struct {
   void *arg;
 } request;
 
-grpc_resolved_addresses *grpc_blocking_resolve_address(
+static grpc_resolved_addresses *blocking_resolve_address_impl(
     const char *name, const char *default_port) {
   struct addrinfo hints;
   struct addrinfo *result = NULL, *resp;
@@ -150,6 +150,9 @@ done:
   return addrs;
 }
 
+grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+    const char *name, const char *default_port) = blocking_resolve_address_impl;
+
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
 static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {

src/core/iomgr/resolve_address_windows.c

@@ -34,17 +34,12 @@
 #include <grpc/support/port_platform.h>
 #ifdef GPR_WINSOCK_SOCKET
 
-#include "src/core/iomgr/sockaddr.h"
 #include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/sockaddr.h"
 
-#include <sys/types.h>
 #include <string.h>
+#include <sys/types.h>
 
-#include "src/core/iomgr/executor.h"
-#include "src/core/iomgr/iomgr_internal.h"
-#include "src/core/iomgr/sockaddr_utils.h"
-#include "src/core/support/block_annotate.h"
-#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
@@ -52,6 +47,11 @@
 #include <grpc/support/string_util.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
+#include "src/core/iomgr/executor.h"
+#include "src/core/iomgr/iomgr_internal.h"
+#include "src/core/iomgr/sockaddr_utils.h"
+#include "src/core/support/block_annotate.h"
+#include "src/core/support/string.h"
 
 typedef struct {
   char *name;
@@ -61,7 +61,7 @@ typedef struct {
   void *arg;
 } request;
 
-grpc_resolved_addresses *grpc_blocking_resolve_address(
+static grpc_resolved_addresses *blocking_resolve_address_impl(
     const char *name, const char *default_port) {
   struct addrinfo hints;
   struct addrinfo *result = NULL, *resp;
@@ -133,6 +133,9 @@ done:
   return addrs;
 }
 
+grpc_resolved_addresses *(*grpc_blocking_resolve_address)(
+    const char *name, const char *default_port) = blocking_resolve_address_impl;
+
 /* Callback to be passed to grpc_executor to asynch-ify
  * grpc_blocking_resolve_address */
 static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp, bool success) {

src/core/iomgr/tcp_server_windows.c

@@ -240,8 +240,7 @@ static void decrement_active_ports_and_notify(grpc_exec_ctx *exec_ctx,
   sp->shutting_down = 0;
   gpr_mu_lock(&sp->server->mu);
   GPR_ASSERT(sp->server->active_ports > 0);
-  if (0 == --sp->server->active_ports &&
-      sp->server->shutdown_complete != NULL) {
+  if (0 == --sp->server->active_ports) {
     notify = 1;
   }
   gpr_mu_unlock(&sp->server->mu);

src/core/iomgr/timer.c

@@ -33,11 +33,11 @@
 
 #include "src/core/iomgr/timer.h"
 
-#include "src/core/iomgr/timer_heap.h"
-#include "src/core/iomgr/time_averaged_stats.h"
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/useful.h>
+#include "src/core/iomgr/time_averaged_stats.h"
+#include "src/core/iomgr/timer_heap.h"
 
 #define INVALID_HEAP_INDEX 0xffffffffu
 
@@ -330,6 +330,18 @@ static int run_some_expired_timers(grpc_exec_ctx *exec_ctx, gpr_timespec now,
 
     gpr_mu_unlock(&g_mu);
     gpr_mu_unlock(&g_checker_mu);
+  } else if (next != NULL) {
+    /* TODO(ctiller): this forces calling code to do an short poll, and
+       then retry the timer check (because this time through the timer list was
+       contended).
+
+       We could reduce the cost here dramatically by keeping a count of how many
+       currently active pollers got through the uncontended case above
+       successfully, and waking up other pollers IFF that count drops to zero.
+
+       Once that count is in place, this entire else branch could disappear. */
+    *next = gpr_time_min(
+        *next, gpr_time_add(now, gpr_time_from_millis(1, GPR_TIMESPAN)));
   }
 
   return (int)n;

src/core/iomgr/timer.h

@@ -96,7 +96,6 @@ void grpc_timer_cancel(grpc_exec_ctx *exec_ctx, grpc_timer *timer);
    *next is never guaranteed to be updated on any given execution; however,
    with high probability at least one thread in the system will see an update
    at any time slice. */
-
 bool grpc_timer_check(grpc_exec_ctx *exec_ctx, gpr_timespec now,
                       gpr_timespec *next);
 void grpc_timer_list_init(gpr_timespec now);

src/core/support/alloc.c

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -87,4 +87,4 @@ void *gpr_malloc_aligned(size_t size, size_t alignment_log) {
   return (void *)ret;
 }
 
-void gpr_free_aligned(void *ptr) { free(((void **)ptr)[-1]); }
+void gpr_free_aligned(void *ptr) { gpr_free(((void **)ptr)[-1]); }

src/core/surface/completion_queue.c

@@ -86,7 +86,7 @@ struct grpc_completion_queue {
 #define POLLSET_FROM_CQ(cq) ((grpc_pollset *)(cq + 1))
 
 static gpr_mu g_freelist_mu;
-grpc_completion_queue *g_freelist;
+static grpc_completion_queue *g_freelist;
 
 static void on_pollset_shutdown_done(grpc_exec_ctx *exec_ctx, void *cc,
                                      bool success);

src/core/tsi/ssl_transport_security.c

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -33,9 +33,18 @@
 
 #include "src/core/tsi/ssl_transport_security.h"
 
+#include <grpc/support/port_platform.h>
+
 #include <limits.h>
 #include <string.h>
 
+/* TODO(jboeuf): refactor inet_ntop into a portability header. */
+#ifdef GPR_WINSOCK_SOCKET
+#include <ws2tcpip.h>
+#else
+#include <arpa/inet.h>
+#endif
+
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/thd.h>
@@ -197,13 +206,16 @@ static void ssl_info_callback(const SSL *ssl, int where, int ret) {
 }
 
 /* Returns 1 if name looks like an IP address, 0 otherwise.
-   This is a very rough heuristic as it does not handle IPV6 or things like:
-   0300.0250.00.01, 0xC0.0Xa8.0x0.0x1, 000030052000001, 0xc0.052000001 */
+   This is a very rough heuristic, and only handles IPv6 in hexadecimal form. */
 static int looks_like_ip_address(const char *name) {
   size_t i;
   size_t dot_count = 0;
   size_t num_size = 0;
   for (i = 0; i < strlen(name); i++) {
+    if (name[i] == ':') {
+      /* IPv6 Address in hexadecimal form, : is not allowed in DNS names. */
+      return 1;
+    }
     if (name[i] >= '0' && name[i] <= '9') {
       if (num_size > 3) return 0;
       num_size++;
@@ -296,21 +308,44 @@ static tsi_result add_subject_alt_names_properties_to_peer(
         sk_GENERAL_NAME_value(subject_alt_names, TSI_SIZE_AS_SIZE(i));
     /* Filter out the non-dns entries names. */
     if (subject_alt_name->type == GEN_DNS) {
-      unsigned char *dns_name = NULL;
-      int dns_name_size =
-          ASN1_STRING_to_UTF8(&dns_name, subject_alt_name->d.dNSName);
-      if (dns_name_size < 0) {
+      unsigned char *name = NULL;
+      int name_size;
+      name_size = ASN1_STRING_to_UTF8(&name, subject_alt_name->d.dNSName);
+      if (name_size < 0) {
         gpr_log(GPR_ERROR, "Could not get utf8 from asn1 string.");
         result = TSI_INTERNAL_ERROR;
         break;
       }
       result = tsi_construct_string_peer_property(
-          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY,
-          (const char *)dns_name, (size_t)dns_name_size,
+          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, (const char *)name,
+          (size_t)name_size, &peer->properties[peer->property_count++]);
+      OPENSSL_free(name);
+    } else if (subject_alt_name->type == GEN_IPADD) {
+      char ntop_buf[INET6_ADDRSTRLEN];
+      int af;
+
+      if (subject_alt_name->d.iPAddress->length == 4) {
+        af = AF_INET;
+      } else if (subject_alt_name->d.iPAddress->length == 16) {
+        af = AF_INET6;
+      } else {
+        gpr_log(GPR_ERROR, "SAN IP Address contained invalid IP");
+        result = TSI_INTERNAL_ERROR;
+        break;
+      }
+      const char *name = inet_ntop(af, subject_alt_name->d.iPAddress->data,
+                                   ntop_buf, INET6_ADDRSTRLEN);
+      if (name == NULL) {
+        gpr_log(GPR_ERROR, "Could not get IP string from asn1 octet.");
+        result = TSI_INTERNAL_ERROR;
+        break;
+      }
+
+      result = tsi_construct_string_peer_property_from_cstring(
+          TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, name,
           &peer->properties[peer->property_count++]);
-      OPENSSL_free(dns_name);
-      if (result != TSI_OK) break;
     }
+    if (result != TSI_OK) break;
   }
   return result;
 }
@@ -1436,9 +1471,7 @@ int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name) {
   size_t i = 0;
   size_t san_count = 0;
   const tsi_peer_property *cn_property = NULL;
-
-  /* For now reject what looks like an IP address. */
-  if (looks_like_ip_address(name)) return 0;
+  int like_ip = looks_like_ip_address(name);
 
   /* Check the SAN first. */
   for (i = 0; i < peer->property_count; i++) {
@@ -1447,8 +1480,15 @@ int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name) {
     if (strcmp(property->name,
                TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY) == 0) {
       san_count++;
-      if (does_entry_match_name(property->value.data, property->value.length,
-                                name)) {
+
+      if (!like_ip && does_entry_match_name(property->value.data,
+                                            property->value.length, name)) {
+        return 1;
+      } else if (like_ip &&
+                 strncmp(name, property->value.data, property->value.length) ==
+                     0 &&
+                 strlen(name) == property->value.length) {
+        /* IP Addresses are exact matches only. */
         return 1;
       }
     } else if (strcmp(property->name,
@@ -1457,8 +1497,8 @@ int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name) {
     }
   }
 
-  /* If there's no SAN, try the CN. */
-  if (san_count == 0 && cn_property != NULL) {
+  /* If there's no SAN, try the CN, but only if its not like an IP Address */
+  if (san_count == 0 && cn_property != NULL && !like_ip) {
     if (does_entry_match_name(cn_property->value.data,
                               cn_property->value.length, name)) {
       return 1;

src/core/tsi/ssl_transport_security.h

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -162,8 +162,7 @@ void tsi_ssl_handshaker_factory_destroy(tsi_ssl_handshaker_factory *self);
    Still TODO(jboeuf):
    - handle mixed case.
    - handle %encoded chars.
-   - handle public suffix wildchar more strictly (e.g. *.co.uk)
-   - handle IP addresses in SAN. */
+   - handle public suffix wildchar more strictly (e.g. *.co.uk) */
 int tsi_ssl_peer_matches_name(const tsi_peer *peer, const char *name);
 
 #ifdef __cplusplus

src/cpp/server/server_context.cc

@@ -62,7 +62,11 @@ class ServerContext::CompletionOp GRPC_FINAL : public CallOpSetInterface {
   void FillOps(grpc_op* ops, size_t* nops) GRPC_OVERRIDE;
   bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
 
-  bool CheckCancelled(CompletionQueue* cq);
+  bool CheckCancelled(CompletionQueue* cq) {
+    cq->TryPluck(this);
+    return CheckCancelledNoPluck();
+  }
+  bool CheckCancelledAsync() { return CheckCancelledNoPluck(); }
 
   void set_tag(void* tag) {
     has_tag_ = true;
@@ -72,6 +76,11 @@ class ServerContext::CompletionOp GRPC_FINAL : public CallOpSetInterface {
   void Unref();
 
  private:
+  bool CheckCancelledNoPluck() {
+    grpc::lock_guard<grpc::mutex> g(mu_);
+    return finalized_ ? (cancelled_ != 0) : false;
+  }
+
   bool has_tag_;
   void* tag_;
   grpc::mutex mu_;
@@ -88,12 +97,6 @@ void ServerContext::CompletionOp::Unref() {
   }
 }
 
-bool ServerContext::CompletionOp::CheckCancelled(CompletionQueue* cq) {
-  cq->TryPluck(this);
-  grpc::lock_guard<grpc::mutex> g(mu_);
-  return finalized_ ? cancelled_ != 0 : false;
-}
-
 void ServerContext::CompletionOp::FillOps(grpc_op* ops, size_t* nops) {
   ops->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
   ops->data.recv_close_on_server.cancelled = &cancelled_;
@@ -182,7 +185,14 @@ void ServerContext::TryCancel() const {
 }
 
 bool ServerContext::IsCancelled() const {
-  return completion_op_ && completion_op_->CheckCancelled(cq_);
+  if (has_notify_when_done_tag_) {
+    // when using async API, but the result is only valid
+    // if the tag has already been delivered at the completion queue
+    return completion_op_ && completion_op_->CheckCancelledAsync();
+  } else {
+    // when using sync API
+    return completion_op_ && completion_op_->CheckCancelled(cq_);
+  }
 }
 
 void ServerContext::set_compression_level(grpc_compression_level level) {

src/csharp/Grpc.Core/Metadata.cs

@@ -323,7 +323,7 @@ namespace Grpc.Core
 
             private static string NormalizeKey(string key)
             {
-                var normalized = GrpcPreconditions.CheckNotNull(key, "key").ToLower(CultureInfo.InvariantCulture);
+                var normalized = GrpcPreconditions.CheckNotNull(key, "key").ToLowerInvariant();
                 GrpcPreconditions.CheckArgument(ValidKeyRegex.IsMatch(normalized), 
                     "Metadata entry key not valid. Keys can only contain lowercase alphanumeric characters, underscores and hyphens.");
                 return normalized;

src/node/src/client.js

@@ -149,6 +149,9 @@ function _readsDone(status) {
   if (!status) {
     status = {code: grpc.status.OK, details: 'OK'};
   }
+  if (status.code !== grpc.status.OK) {
+    this.call.cancelWithStatus(status.code, status.details);
+  }
   this.finished = true;
   this.read_status = status;
   this._emitStatusIfDone();

src/objective-c/GRPCClient/GRPCCall.m

@@ -37,6 +37,8 @@
 #include <grpc/support/time.h>
 #import <RxLibrary/GRXConcurrentWriteable.h>
 
+#import "private/GRPCConnectivityMonitor.h"
+#import "private/GRPCHost.h"
 #import "private/GRPCRequestHeaders.h"
 #import "private/GRPCWrappedCall.h"
 #import "private/NSData+GRPC.h"
@@ -71,8 +73,11 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 @implementation GRPCCall {
   dispatch_queue_t _callQueue;
 
+  NSString *_host;
+  NSString *_path;
   GRPCWrappedCall *_wrappedCall;
   dispatch_once_t _callAlreadyInvoked;
+  GRPCConnectivityMonitor *_connectivityMonitor;
 
   // The C gRPC library has less guarantees on the ordering of events than we
   // do. Particularly, in the face of errors, there's no ordering guarantee at
@@ -115,13 +120,11 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
                 format:@"The requests writer can't be already started."];
   }
   if ((self = [super init])) {
-    _wrappedCall = [[GRPCWrappedCall alloc] initWithHost:host path:path];
-    if (!_wrappedCall) {
-      return nil;
-    }
+    _host = [host copy];
+    _path = [path copy];
 
     // Serial queue to invoke the non-reentrant methods of the grpc_call object.
-    _callQueue = dispatch_queue_create("org.grpc.call", NULL);
+    _callQueue = dispatch_queue_create("io.grpc.call", NULL);
 
     _requestWriter = requestWriter;
 
@@ -156,7 +159,7 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
 - (void)cancel {
   [self finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
                                             code:GRPCErrorCodeCancelled
-                                        userInfo:nil]];
+                                        userInfo:@{NSLocalizedDescriptionKey: @"Canceled by app"}]];
   [self cancelCall];
 }
 
@@ -354,8 +357,29 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
   _retainSelf = self;
 
   _responseWriteable = [[GRXConcurrentWriteable alloc] initWithWriteable:writeable];
+
+  _wrappedCall = [[GRPCWrappedCall alloc] initWithHost:_host path:_path];
+  NSAssert(_wrappedCall, @"Error allocating RPC objects. Low memory?");
+
   [self sendHeaders:_requestHeaders];
   [self invokeCall];
+  // TODO(jcanizales): Extract this logic somewhere common.
+  NSString *host = [NSURL URLWithString:[@"https://" stringByAppendingString:_host]].host;
+  if (!host) {
+    // TODO(jcanizales): Check this on init.
+    [NSException raise:NSInvalidArgumentException format:@"host of %@ is nil", _host];
+  }
+  __weak typeof(self) weakSelf = self;
+  _connectivityMonitor = [GRPCConnectivityMonitor monitorWithHost:host];
+  [_connectivityMonitor handleLossWithHandler:^{
+    typeof(self) strongSelf = weakSelf;
+    if (strongSelf) {
+      [strongSelf finishWithError:[NSError errorWithDomain:kGRPCErrorDomain
+                                                      code:GRPCErrorCodeUnavailable
+                                                  userInfo:@{NSLocalizedDescriptionKey: @"Connectivity lost."}]];
+      [[GRPCHost hostWithAddress:strongSelf->_host] disconnect];
+    }
+  }];
 }
 
 - (void)setState:(GRXWriterState)newState {
@@ -385,4 +409,5 @@ NSString * const kGRPCTrailersKey = @"io.grpc.TrailersKey";
       return;
   }
 }
+
 @end

src/objective-c/GRPCClient/private/GRPCChannel.h

@@ -35,6 +35,7 @@
 
 #include <grpc/grpc.h>
 
+@class GRPCCompletionQueue;
 struct grpc_channel_credentials;
 
 
@@ -80,4 +81,6 @@ struct grpc_channel_credentials;
 + (nonnull GRPCChannel *)insecureChannelWithHost:(nonnull NSString *)host
                                      channelArgs:(nullable NSDictionary *)channelArgs;
 
+- (nullable grpc_call *)unmanagedCallWithPath:(nonnull NSString *)path
+                              completionQueue:(nonnull GRPCCompletionQueue *)queue;
 @end

src/objective-c/GRPCClient/private/GRPCChannel.m

@@ -38,6 +38,8 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
+#import "GRPCCompletionQueue.h"
+
 /**
  * Returns @c grpc_channel_credentials from the specified @c path. If the file at the path could not
  * be read then NULL is returned. If NULL is returned, @c errorPtr may not be NULL if there are
@@ -205,4 +207,16 @@ grpc_channel_args * buildChannelArgs(NSDictionary *dictionary) {
                                channelArgs:channelArgs];
 }
 
+- (grpc_call *)unmanagedCallWithPath:(NSString *)path
+                     completionQueue:(GRPCCompletionQueue *)queue {
+  return grpc_channel_create_call(_unmanagedChannel,
+                                  NULL, GRPC_PROPAGATE_DEFAULTS,
+                                  queue.unmanagedQueue,
+                                  path.UTF8String,
+                                  // Get "host" from "host:port"
+                                  // TODO(jcanizales): Use NSURLs throughout, to clarify these.
+                                  [_host componentsSeparatedByString:@":"][0].UTF8String,
+                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+}
+
 @end

src/objective-c/GRPCClient/private/GRPCCompletionQueue.h

@@ -36,6 +36,8 @@
 
 typedef void(^GRPCQueueCompletionHandler)(bool success);
 
+extern const int64_t kGRPCCompletionQueueDefaultTimeoutSecs;
+
 /**
  * This class lets one more easily use |grpc_completion_queue|. To use it, pass the value of the
  * |unmanagedQueue| property of an instance of this class to |grpc_channel_create_call|. Then for
@@ -49,6 +51,11 @@ typedef void(^GRPCQueueCompletionHandler)(bool success);
  */
 @interface GRPCCompletionQueue : NSObject
 @property(nonatomic, readonly) grpc_completion_queue *unmanagedQueue;
+@property(nonatomic, readonly) int64_t timeoutSecs;
 
 + (instancetype)completionQueue;
+
+- (instancetype)init;
+- (instancetype)initWithTimeout:(int64_t)timeoutSecs NS_DESIGNATED_INITIALIZER;
+
 @end

src/objective-c/GRPCClient/private/GRPCCompletionQueue.m

@@ -35,15 +35,28 @@
 
 #import <grpc/grpc.h>
 
+
+const int64_t kGRPCCompletionQueueDefaultTimeoutSecs = 60;
+
 @implementation GRPCCompletionQueue
 
 + (instancetype)completionQueue {
-  return [[self alloc] init];
+  static GRPCCompletionQueue *singleton = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    singleton = [[self alloc] init];
+  });
+  return singleton;
 }
 
 - (instancetype)init {
+  return [self initWithTimeout:kGRPCCompletionQueueDefaultTimeoutSecs];
+}
+
+- (instancetype)initWithTimeout:(int64_t)timeoutSecs {
   if ((self = [super init])) {
     _unmanagedQueue = grpc_completion_queue_create(NULL);
+    _timeoutSecs = timeoutSecs;
 
     // This is for the following block to capture the pointer by value (instead
     // of retaining self and doing self->_unmanagedQueue). This is essential
@@ -61,22 +74,28 @@
       gDefaultConcurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
     });
     dispatch_async(gDefaultConcurrentQueue, ^{
+      // Using a non-infinite deadline to re-enter grpc_completion_queue_next()
+      // alleviates https://github.com/grpc/grpc/issues/5593
+      gpr_timespec deadline = (timeoutSecs < 0)
+          ? gpr_inf_future(GPR_CLOCK_REALTIME)
+          : gpr_time_from_seconds(timeoutSecs, GPR_CLOCK_REALTIME);
       while (YES) {
-        // The following call blocks until an event is available.
-        grpc_event event = grpc_completion_queue_next(unmanagedQueue,
-                                                      gpr_inf_future(GPR_CLOCK_REALTIME),
-                                                      NULL);
+        // The following call blocks until an event is available or the deadline elapses.
+        grpc_event event = grpc_completion_queue_next(unmanagedQueue, deadline, NULL);
         GRPCQueueCompletionHandler handler;
         switch (event.type) {
           case GRPC_OP_COMPLETE:
             handler = (__bridge_transfer GRPCQueueCompletionHandler)event.tag;
             handler(event.success);
             break;
+          case GRPC_QUEUE_TIMEOUT:
+            // Nothing to do here
+            break;
           case GRPC_QUEUE_SHUTDOWN:
             grpc_completion_queue_destroy(unmanagedQueue);
             return;
           default:
-            [NSException raise:@"Unrecognized completion type" format:@""];
+            [NSException raise:@"Unrecognized completion type" format:@"type=%d", event.type];
         }
       };
     });

src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.h

@@ -0,0 +1,77 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#import <Foundation/Foundation.h>
+#import <SystemConfiguration/SystemConfiguration.h>
+
+@interface GRPCReachabilityFlags : NSObject
+
++ (nonnull instancetype)flagsWithFlags:(SCNetworkReachabilityFlags)flags;
+
+/**
+ * One accessor method to query each of the different flags. Example:
+
+@property(nonatomic, readonly) BOOL isCell;
+
+ */
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+@property(nonatomic, readonly) BOOL methodName;
+
+#include "GRPCReachabilityFlagNames.xmacro.h"
+#undef GRPC_XMACRO_ITEM
+
+@property(nonatomic, readonly) BOOL isHostReachable;
+@end
+
+
+@interface GRPCConnectivityMonitor : NSObject
+
++ (nullable instancetype)monitorWithHost:(nonnull NSString *)hostName;
+
+- (nonnull instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Queue on which callbacks will be dispatched. Default is the main queue. Set it before calling
+ * handleLossWithHandler:.
+ */
+// TODO(jcanizales): Default to a serial background queue instead.
+@property(nonatomic, strong, null_resettable) dispatch_queue_t queue;
+
+/**
+ * Calls handler every time the connectivity to this instance's host is lost. If this instance is
+ * released before that happens, the handler won't be called.
+ * Only one handler is active at a time, so if this method is called again before the previous
+ * handler has been called, it might never be called at all (or yes, if it has already been queued).
+ */
+- (void)handleLossWithHandler:(nonnull void (^)())handler;
+@end

src/objective-c/GRPCClient/private/GRPCConnectivityMonitor.m

@@ -0,0 +1,192 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#import "GRPCConnectivityMonitor.h"
+
+#pragma mark Flags
+
+@implementation GRPCReachabilityFlags {
+  SCNetworkReachabilityFlags _flags;
+}
+
++ (instancetype)flagsWithFlags:(SCNetworkReachabilityFlags)flags {
+  return [[self alloc] initWithFlags:flags];
+}
+
+- (instancetype)initWithFlags:(SCNetworkReachabilityFlags)flags {
+  if ((self = [super init])) {
+    _flags = flags;
+  }
+  return self;
+}
+
+/*
+ * One accessor method implementation per flag. Example:
+
+- (BOOL)isCell { \
+  return !!(_flags & kSCNetworkReachabilityFlagsIsWWAN); \
+}
+
+ */
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+- (BOOL)methodName { \
+  return !!(_flags & kSCNetworkReachabilityFlags ## FlagName); \
+}
+#include "GRPCReachabilityFlagNames.xmacro.h"
+#undef GRPC_XMACRO_ITEM
+
+- (BOOL)isHostReachable {
+  // Note: connectionOnDemand means it'll be reachable only if using the CFSocketStream API or APIs
+  // on top of it.
+  // connectionRequired means we can't tell until a connection is attempted (e.g. for VPN on
+  // demand).
+  return self.reachable && !self.interventionRequired && !self.connectionOnDemand;
+}
+
+- (NSString *)description {
+  NSMutableArray *activeOptions = [NSMutableArray arrayWithCapacity:9];
+
+  /*
+   * For each flag, add its name to the array if it's ON. Example:
+
+  if (self.isCell) {
+    [activeOptions addObject:@"isCell"];
+  }
+
+   */
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+  if (self.methodName) { \
+    [activeOptions addObject:@#methodName]; \
+  }
+#include "GRPCReachabilityFlagNames.xmacro.h"
+#undef GRPC_XMACRO_ITEM
+
+  return activeOptions.count == 0 ? @"(none)" : [activeOptions componentsJoinedByString:@", "];
+}
+
+- (BOOL)isEqual:(id)object {
+  return [object isKindOfClass:[GRPCReachabilityFlags class]] &&
+      _flags == ((GRPCReachabilityFlags *)object)->_flags;
+}
+
+- (NSUInteger)hash {
+  return _flags;
+}
+@end
+
+#pragma mark Connectivity Monitor
+
+// Assumes the third argument is a block that accepts a GRPCReachabilityFlags object, and passes the
+// received ones to it.
+static void PassFlagsToContextInfoBlock(SCNetworkReachabilityRef target,
+                                        SCNetworkReachabilityFlags flags,
+                                        void *info) {
+  #pragma unused (target)
+  // This can be called many times with the same info. The info is retained by SCNetworkReachability
+  // while this function is being executed.
+  void (^handler)(GRPCReachabilityFlags *) = (__bridge void (^)(GRPCReachabilityFlags *))info;
+  handler([[GRPCReachabilityFlags alloc] initWithFlags:flags]);
+}
+
+@implementation GRPCConnectivityMonitor {
+  SCNetworkReachabilityRef _reachabilityRef;
+}
+
+- (nullable instancetype)initWithReachability:(nullable SCNetworkReachabilityRef)reachability {
+  if (!reachability) {
+    return nil;
+  }
+  if ((self = [super init])) {
+    _reachabilityRef = CFRetain(reachability);
+    _queue = dispatch_get_main_queue();
+  }
+  return self;
+}
+
++ (nullable instancetype)monitorWithHost:(nonnull NSString *)host {
+  const char *hostName = host.UTF8String;
+  if (!hostName) {
+    [NSException raise:NSInvalidArgumentException
+                format:@"host.UTF8String returns NULL for %@", host];
+  }
+  SCNetworkReachabilityRef reachability =
+      SCNetworkReachabilityCreateWithName(NULL, hostName);
+
+  GRPCConnectivityMonitor *returnValue = [[self alloc] initWithReachability:reachability];
+  if (reachability) {
+    CFRelease(reachability);
+  }
+  return returnValue;
+}
+
+- (void)handleLossWithHandler:(void (^)())handler {
+  [self startListeningWithHandler:^(GRPCReachabilityFlags *flags) {
+    if (!flags.isHostReachable) {
+      handler();
+    }
+  }];
+}
+
+- (void)startListeningWithHandler:(void (^)(GRPCReachabilityFlags *))handler {
+  // Copy to ensure the handler block is in the heap (and so can't be deallocated when this method
+  // returns).
+  void (^copiedHandler)(GRPCReachabilityFlags *) = [handler copy];
+  SCNetworkReachabilityContext context = {
+    .version = 0,
+    .info = (__bridge void *)copiedHandler,
+    .retain = CFRetain,
+    .release = CFRelease,
+  };
+  // The following will retain context.info, and release it when the callback is set to NULL.
+  SCNetworkReachabilitySetCallback(_reachabilityRef, PassFlagsToContextInfoBlock, &context);
+  SCNetworkReachabilitySetDispatchQueue(_reachabilityRef, _queue);
+}
+
+- (void)stopListening {
+  // This releases the block on context.info.
+  SCNetworkReachabilitySetCallback(_reachabilityRef, NULL, NULL);
+  SCNetworkReachabilitySetDispatchQueue(_reachabilityRef, NULL);
+}
+
+- (void)setQueue:(dispatch_queue_t)queue {
+  _queue = queue ?: dispatch_get_main_queue();
+}
+
+- (void)dealloc {
+  if (_reachabilityRef) {
+    [self stopListening];
+    CFRelease(_reachabilityRef);
+  }
+}
+
+@end

src/objective-c/GRPCClient/private/GRPCHost.h

@@ -33,27 +33,39 @@
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @class GRPCCompletionQueue;
 struct grpc_call;
 
 @interface GRPCHost : NSObject
 
 @property(nonatomic, readonly) NSString *address;
-@property(nonatomic, copy) NSString *userAgentPrefix;
+@property(nonatomic, copy, nullable) NSString *userAgentPrefix;
 
 /** The following properties should only be modified for testing: */
 
 @property(nonatomic, getter=isSecure) BOOL secure;
 
-@property(nonatomic, copy) NSString *pathToCertificates;
-@property(nonatomic, copy) NSString *hostNameOverride;
+@property(nonatomic, copy, nullable) NSString *pathToCertificates;
+@property(nonatomic, copy, nullable) NSString *hostNameOverride;
 
+- (nullable instancetype)init NS_UNAVAILABLE;
 /** Host objects initialized with the same address are the same. */
-+ (instancetype)hostWithAddress:(NSString *)address;
-- (instancetype)initWithAddress:(NSString *)address NS_DESIGNATED_INITIALIZER;
++ (nullable instancetype)hostWithAddress:(NSString *)address;
+- (nullable instancetype)initWithAddress:(NSString *)address NS_DESIGNATED_INITIALIZER;
 
 /** Create a grpc_call object to the provided path on this host. */
-- (struct grpc_call *)unmanagedCallWithPath:(NSString *)path
-                            completionQueue:(GRPCCompletionQueue *)queue;
+- (nullable struct grpc_call *)unmanagedCallWithPath:(NSString *)path
+                                     completionQueue:(GRPCCompletionQueue *)queue;
 
+// TODO: There's a race when a new RPC is coming through just as an existing one is getting
+// notified that there's no connectivity. If connectivity comes back at that moment, the new RPC
+// will have its channel destroyed by the other RPC, and will never get notified of a problem, so
+// it'll hang (the C layer logs a timeout, with exponential back off). One solution could be to pass
+// the GRPCChannel to the GRPCCall, renaming this as "disconnectChannel:channel", which would only
+// act on that specific channel.
+- (void)disconnect;
 @end
+
+NS_ASSUME_NONNULL_END

src/objective-c/GRPCClient/private/GRPCHost.m

@@ -34,33 +34,30 @@
 #import "GRPCHost.h"
 
 #include <grpc/grpc.h>
+#import <GRPCClient/GRPCCall.h>
 #import <GRPCClient/GRPCCall+ChannelArg.h>
 
 #import "GRPCChannel.h"
 #import "GRPCCompletionQueue.h"
 #import "NSDictionary+GRPC.h"
 
+NS_ASSUME_NONNULL_BEGIN
+
 // TODO(jcanizales): Generate the version in a standalone header, from templates. Like
 // templates/src/core/surface/version.c.template .
 #define GRPC_OBJC_VERSION_STRING @"0.13.0"
 
-@interface GRPCHost ()
-// TODO(mlumish): Investigate whether caching channels with strong links is a good idea.
-@property(nonatomic, strong) GRPCChannel *channel;
-@end
-
-@implementation GRPCHost
-
-+ (instancetype)hostWithAddress:(NSString *)address {
-  return [[self alloc] initWithAddress:address];
+@implementation GRPCHost {
+  // TODO(mlumish): Investigate whether caching channels with strong links is a good idea.
+  GRPCChannel *_channel;
 }
 
-- (instancetype)init {
-  return [self initWithAddress:nil];
++ (nullable instancetype)hostWithAddress:(NSString *)address {
+  return [[self alloc] initWithAddress:address];
 }
 
 // Default initializer.
-- (instancetype)initWithAddress:(NSString *)address {
+- (nullable instancetype)initWithAddress:(NSString *)address {
   if (!address) {
     return nil;
   }
@@ -95,46 +92,45 @@
   return self;
 }
 
-- (grpc_call *)unmanagedCallWithPath:(NSString *)path completionQueue:(GRPCCompletionQueue *)queue {
-  if (!queue || !path || !self.channel) {
-    return NULL;
+- (nullable grpc_call *)unmanagedCallWithPath:(NSString *)path
+                              completionQueue:(GRPCCompletionQueue *)queue {
+  GRPCChannel *channel;
+  // This is racing -[GRPCHost disconnect].
+  @synchronized(self) {
+    if (!_channel) {
+      _channel = [self newChannel];
+    }
+    channel = _channel;
   }
-  return grpc_channel_create_call(self.channel.unmanagedChannel,
-                                  NULL, GRPC_PROPAGATE_DEFAULTS,
-                                  queue.unmanagedQueue,
-                                  path.UTF8String,
-                                  self.hostName.UTF8String,
-                                  gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
+  return [channel unmanagedCallWithPath:path completionQueue:queue];
 }
 
-- (GRPCChannel *)channel {
-  // Create it lazily, because we don't want to open a connection just because someone is
-  // configuring a host.
+- (NSDictionary *)channelArgs {
+  NSMutableDictionary *args = [NSMutableDictionary dictionary];
 
-  if (!_channel) {
-    NSMutableDictionary *args = [NSMutableDictionary dictionary];
+  // TODO(jcanizales): Add OS and device information (see
+  // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#user-agents ).
+  NSString *userAgent = @"grpc-objc/" GRPC_OBJC_VERSION_STRING;
+  if (_userAgentPrefix) {
+    userAgent = [_userAgentPrefix stringByAppendingFormat:@" %@", userAgent];
+  }
+  args[@GRPC_ARG_PRIMARY_USER_AGENT_STRING] = userAgent;
 
-    // TODO(jcanizales): Add OS and device information (see
-    // https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#user-agents ).
-    NSString *userAgent = @"grpc-objc/" GRPC_OBJC_VERSION_STRING;
-    if (_userAgentPrefix) {
-      userAgent = [@[_userAgentPrefix, userAgent] componentsJoinedByString:@" "];
-    }
-    args[@GRPC_ARG_PRIMARY_USER_AGENT_STRING] = userAgent;
-
-    if (_secure) {
-      if (_hostNameOverride) {
-        args[@GRPC_SSL_TARGET_NAME_OVERRIDE_ARG] = _hostNameOverride;
-      }
-
-      _channel = [GRPCChannel secureChannelWithHost:_address
-                                 pathToCertificates:_pathToCertificates
-                                        channelArgs:args];
-    } else {
-      _channel = [GRPCChannel insecureChannelWithHost:_address channelArgs:args];
-    }
+  if (_secure && _hostNameOverride) {
+    args[@GRPC_SSL_TARGET_NAME_OVERRIDE_ARG] = _hostNameOverride;
+  }
+  return args;
+}
+
+- (GRPCChannel *)newChannel {
+  NSDictionary *args = [self channelArgs];
+  if (_secure) {
+    return [GRPCChannel secureChannelWithHost:_address
+                           pathToCertificates:_pathToCertificates
+                                  channelArgs:args];
+  } else {
+    return [GRPCChannel insecureChannelWithHost:_address channelArgs:args];
   }
-  return _channel;
 }
 
 - (NSString *)hostName {
@@ -142,7 +138,16 @@
   return _hostNameOverride ?: _address;
 }
 
+- (void)disconnect {
+  // This is racing -[GRPCHost unmanagedCallWithPath:completionQueue:].
+  @synchronized(self) {
+    _channel = nil;
+  }
+}
+
 // TODO(jcanizales): Don't let set |secure| to |NO| if |pathToCertificates| or |hostNameOverride|
 // have been set. Don't let set either of the latter if |secure| has been set to |NO|.
 
 @end
+
+NS_ASSUME_NONNULL_END

src/objective-c/GRPCClient/private/GRPCReachabilityFlagNames.xmacro.h

@@ -0,0 +1,65 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/**
+ * "X-macro" file that lists the flags names of Apple's Network Reachability API, along with a nice
+ * Objective-C method name used to query each of them.
+ *
+ * Example usage: To generate a dictionary from flag value to name, one can do:
+
+  NSDictionary *flagNames = @{
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+    @(kSCNetworkReachabilityFlags ## FlagName): @#methodName,
+#include "GRXReachabilityFlagNames.xmacro.h"
+#undef GRPC_XMACRO_ITEM
+  };
+
+  XCTAssertEqualObjects(flagNames[@(kSCNetworkReachabilityFlagsIsWWAN)], @"isCell");
+
+ */
+
+#ifndef GRPC_XMACRO_ITEM
+#error This file is to be used with the "X-macro" pattern: Please #define \
+       GRPC_XMACRO_ITEM(methodName, FlagName), then #include this file, and then #undef \
+       GRPC_XMACRO_ITEM.
+#endif
+
+GRPC_XMACRO_ITEM(isCell, IsWWAN)
+GRPC_XMACRO_ITEM(reachable, Reachable)
+GRPC_XMACRO_ITEM(transientConnection, TransientConnection)
+GRPC_XMACRO_ITEM(connectionRequired, ConnectionRequired)
+GRPC_XMACRO_ITEM(connectionOnTraffic, ConnectionOnTraffic)
+GRPC_XMACRO_ITEM(interventionRequired, InterventionRequired)
+GRPC_XMACRO_ITEM(connectionOnDemand, ConnectionOnDemand)
+GRPC_XMACRO_ITEM(isLocalAddress, IsLocalAddress)
+GRPC_XMACRO_ITEM(isDirect, IsDirect)

src/objective-c/GRPCClient/private/GRPCWrappedCall.h

@@ -34,7 +34,6 @@
 #import <Foundation/Foundation.h>
 #include <grpc/grpc.h>
 
-#import "GRPCChannel.h"
 #import "GRPCRequestHeaders.h"
 
 @interface GRPCOperation : NSObject
@@ -94,4 +93,5 @@
 - (void)startBatchWithOperations:(NSArray *)ops;
 
 - (void)cancel;
+
 @end

src/objective-c/RxLibrary/GRXWriteable.m

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -42,11 +42,42 @@
   if (!handler) {
     return [[self alloc] init];
   }
-  return [[self alloc] initWithValueHandler:^(id value) {
-    handler(value, nil);
-  } completionHandler:^(NSError *errorOrNil) {
-    if (errorOrNil) {
-      handler(nil, errorOrNil);
+  // We nilify this variable when the block is invoked, so that handler is only invoked once even if
+  // the writer tries to write multiple values.
+  __block GRXEventHandler eventHandler = ^(BOOL done, id value, NSError *error) {
+    // Nillify eventHandler before invoking handler, in case the latter causes the former to be
+    // executed recursively. Because blocks can be deallocated even during execution, we have to
+    // first retain handler locally to guarantee it's valid.
+    // TODO(jcanizales): Just turn this craziness into a simple subclass of GRXWriteable.
+    GRXSingleHandler singleHandler = handler;
+    eventHandler = nil;
+
+    if (value) {
+      singleHandler(value, nil);
+    } else if (error) {
+      singleHandler(nil, error);
+    } else {
+      NSDictionary *userInfo = @{
+        NSLocalizedDescriptionKey: @"The writer finished without producing any value."
+      };
+      // Even though RxLibrary is independent of gRPC, the domain and code here are, for the moment,
+      // set to the values of kGRPCErrorDomain and GRPCErrorCodeInternal. This way, the error formed
+      // is the one user of gRPC would expect if the server failed to produce a response.
+      //
+      // TODO(jcanizales): Figure out a way to keep errors of RxLibrary generic without making users
+      // of gRPC take care of two different error domains and error code enums. A possibility is to
+      // add error handling to GRXWriters or GRXWriteables, and use them to translate errors between
+      // the two domains.
+      static NSString *kGRPCErrorDomain = @"io.grpc";
+      static NSUInteger kGRPCErrorCodeInternal = 13;
+      singleHandler(nil, [NSError errorWithDomain:kGRPCErrorDomain
+                                             code:kGRPCErrorCodeInternal
+                                         userInfo:userInfo]);
+    }
+  };
+  return [self writeableWithEventHandler:^(BOOL done, id value, NSError *error) {
+    if (eventHandler) {
+      eventHandler(done, value, error);
     }
   }];
 }

src/objective-c/tests/GRPCClientTests.m

@@ -273,10 +273,12 @@ static ProtoMethod *kUnaryCallMethod;
   id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
     XCTAssertNotNil(value, @"nil value received as response.");
     XCTAssertEqual([value length], 0, @"Non-empty response received: %@", value);
+    /* This test needs to be more clever in regards to changing the version of the core.
     XCTAssertEqualObjects(call.responseHeaders[@"x-grpc-test-echo-useragent"],
                           @"Foo grpc-objc/0.13.0 grpc-c/0.14.0-dev (ios)",
                           @"Did not receive expected user agent %@",
                           call.responseHeaders[@"x-grpc-test-echo-useragent"]);
+    */
     [response fulfill];
   } completionHandler:^(NSError *errorOrNil) {
     XCTAssertNil(errorOrNil, @"Finished with unexpected error: %@", errorOrNil);

src/objective-c/tests/RxLibraryUnitTests.m

@@ -64,6 +64,8 @@
 }
 @end
 
+// TODO(jcanizales): Split into one file per tested class.
+
 @interface RxLibraryUnitTests : XCTestCase
 @end
 
@@ -79,6 +81,7 @@
   // If:
   id<GRXWriteable> writeable = [GRXWriteable writeableWithSingleHandler:handler.block];
   [writeable writeValue:anyValue];
+  [writeable writesFinishedWithError:nil];
 
   // Then:
   XCTAssertEqual(handler.timesCalled, 1);
@@ -101,6 +104,54 @@
   XCTAssertEqualObjects(handler.errorOrNil, anyError);
 }
 
+- (void)testWriteableSingleHandlerIsCalledOnlyOnce_ValueThenError {
+  // Given:
+  CapturingSingleValueHandler *handler = [CapturingSingleValueHandler handler];
+  id anyValue = @7;
+  NSError *anyError = [NSError errorWithDomain:@"domain" code:7 userInfo:nil];
+
+  // If:
+  id<GRXWriteable> writeable = [GRXWriteable writeableWithSingleHandler:handler.block];
+  [writeable writeValue:anyValue];
+  [writeable writesFinishedWithError:anyError];
+
+  // Then:
+  XCTAssertEqual(handler.timesCalled, 1);
+  XCTAssertEqualObjects(handler.value, anyValue);
+  XCTAssertEqualObjects(handler.errorOrNil, nil);
+}
+
+- (void)testWriteableSingleHandlerIsCalledOnlyOnce_ValueThenValue {
+  // Given:
+  CapturingSingleValueHandler *handler = [CapturingSingleValueHandler handler];
+  id anyValue = @7;
+
+  // If:
+  id<GRXWriteable> writeable = [GRXWriteable writeableWithSingleHandler:handler.block];
+  [writeable writeValue:anyValue];
+  [writeable writeValue:anyValue];
+  [writeable writesFinishedWithError:nil];
+
+  // Then:
+  XCTAssertEqual(handler.timesCalled, 1);
+  XCTAssertEqualObjects(handler.value, anyValue);
+  XCTAssertEqualObjects(handler.errorOrNil, nil);
+}
+
+- (void)testWriteableSingleHandlerFailsOnEmptyWriter {
+  // Given:
+  CapturingSingleValueHandler *handler = [CapturingSingleValueHandler handler];
+
+  // If:
+  id<GRXWriteable> writeable = [GRXWriteable writeableWithSingleHandler:handler.block];
+  [writeable writesFinishedWithError:nil];
+
+  // Then:
+  XCTAssertEqual(handler.timesCalled, 1);
+  XCTAssertEqualObjects(handler.value, nil);
+  XCTAssertNotNil(handler.errorOrNil);
+}
+
 #pragma mark BufferedPipe
 
 - (void)testBufferedPipePropagatesValue {

src/php/composer.json

@@ -1,7 +1,9 @@
 {
   "name": "grpc/grpc",
+  "type": "library",
   "description": "gRPC library for PHP",
-  "version": "0.6.0",
+  "version": "0.14.0",
+  "keywords": ["rpc"],
   "homepage": "http://grpc.io",
   "license": "BSD-3-Clause",
   "repositories": [
@@ -13,7 +15,7 @@
   "require": {
     "php": ">=5.5.0",
     "datto/protobuf-php": "dev-master",
-    "google/auth": "dev-master"
+    "google/auth": "v0.7"
   },
   "autoload": {
     "psr-4": {

src/php/ext/grpc/README.md

@@ -1,67 +0,0 @@
-gRPC PHP Extension
-==================
-
-# Requirements
-
- * PHP 5.5+
- * [gRPC core library](https://github.com/grpc/grpc) 0.11.0
-
-# Installation
-
-## Install PHP 5
-
-```
-$ sudo apt-get install git php5 php5-dev php-pear unzip
-```
-
-## Compile gRPC Core Library
-
-Clone the gRPC source code repository
-
-```
-$ git clone https://github.com/grpc/grpc.git
-```
-
-Build and install the gRPC C core libraries
-
-```sh
-$ cd grpc
-$ git checkout --track origin/release-0_11
-$ git pull --recurse-submodules && git submodule update --init --recursive
-$ make
-$ sudo make install
-```
-
-Note: you may encounter a warning about the Protobuf compiler `protoc` 3.0.0+ not being installed. The following might help, and will be useful later on when we need to compile the `protoc-gen-php` tool.
-
-```sh
-$ cd grpc/third_party/protobuf
-$ sudo make install   # 'make' should have been run by core grpc
-```
-
-## Install the gRPC PHP extension
-
-Quick install
-
-```sh
-$ sudo pecl install grpc
-```
-
-Note: before a stable release, you may need to do
-
-```sh
-$ sudo pecl install grpc-beta
-```
-
-OR
-
-Compile from source
-
-```sh
-$ # from grpc
-$ cd src/php/ext/grpc
-$ phpize
-$ ./configure
-$ make
-$ sudo make install
-```

src/php/tests/generated_code/math_client.php

@@ -1,7 +1,7 @@
 <?php
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -43,7 +43,9 @@ function p($line)
 
 $host = 'localhost:50051';
 p("Connecting to host: $host");
-$client = new math\MathClient($host, []);
+$client = new math\MathClient($host, [
+    'credentials' => Grpc\ChannelCredentials::createInsecure()
+]);
 p('Client class: '.get_class($client));
 p('');
 

src/proto/grpc/testing/echo_messages.proto

@@ -42,6 +42,7 @@ message RequestParams {
   bool echo_peer = 7;
   string expected_client_identity = 8; // will force check_auth_context.
   bool skip_cancelled_check = 9;
+  string expected_transport_security_type = 10;
 }
 
 message EchoRequest {

src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi

@@ -95,7 +95,6 @@ cdef class Channel:
       self, grpc_connectivity_state last_observed_state,
       Timespec deadline not None, CompletionQueue queue not None, tag):
     cdef OperationTag operation_tag = OperationTag(tag)
-    operation_tag.references = [self, queue]
     cpython.Py_INCREF(operation_tag)
     grpc_channel_watch_connectivity_state(
         self.c_channel, last_observed_state, deadline.c_time,

src/python/grpcio/grpc/_cython/_cygrpc/server.pyx.pxi

@@ -106,7 +106,6 @@ cdef class Server:
     self.is_shutting_down = True
     operation_tag = OperationTag(tag)
     operation_tag.shutting_down_server = self
-    operation_tag.references.extend([self, queue])
     cpython.Py_INCREF(operation_tag)
     grpc_server_shutdown_and_notify(
         self.c_server, queue.c_completion_queue,

src/python/grpcio/tests/_runner.py

@@ -43,6 +43,13 @@ import uuid
 from tests import _loader
 from tests import _result
 
+# This number needs to be large enough to outpace output on stdout and stderr
+# from the gRPC core, otherwise we could end up in a potential deadlock. This
+# stems from the OS waiting on someone to clear a filled pipe buffer while the
+# GIL is held from a write to stderr from gRPC core, but said someone is in
+# Python code thus necessitating GIL acquisition.
+_READ_BYTES = 2**20
+
 
 class CapturePipe(object):
   """A context-manager pipe to redirect output to a byte array.
@@ -76,6 +83,10 @@ class CapturePipe(object):
     flags = fcntl.fcntl(self._read_fd, fcntl.F_GETFL)
     fcntl.fcntl(self._read_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
     self._read_thread = threading.Thread(target=self._read)
+    # If the user wants to exit from the Python program and hits ctrl-C and the
+    # read thread is somehow deadlocked with something else, the Python code may
+    # refuse to exit. This prevents that by making the read thread second-class.
+    self._read_thread.daemon = True
     self._read_thread.start()
 
   def stop(self):
@@ -93,7 +104,7 @@ class CapturePipe(object):
     self.output = bytearray()
     while True:
       select.select([self._read_fd], [], [])
-      read_bytes = os.read(self._read_fd, 1024)
+      read_bytes = os.read(self._read_fd, _READ_BYTES)
       if read_bytes:
         self.output.extend(read_bytes)
       else:

src/python/grpcio/tests/tests.json

@@ -12,31 +12,22 @@
   "_core_over_links_base_interface_test.SyncEasyTest", 
   "_core_over_links_base_interface_test.SyncPeasyTest", 
   "_crust_over_core_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_face_interface_test.DynamicInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_face_interface_test.GenericInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_face_interface_test.MultiCallableInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_over_links_face_interface_test.DynamicInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_over_links_face_interface_test.GenericInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest", 
-  "_crust_over_core_over_links_face_interface_test.MultiCallableInvokerEventInvocationSynchronousEventServiceTest", 
   "_crust_over_core_over_links_face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_face_interface_test.DynamicInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.DynamicInvokerEventInvocationSynchronousEventServiceTest", 
   "_face_interface_test.DynamicInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_face_interface_test.GenericInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.GenericInvokerEventInvocationSynchronousEventServiceTest", 
   "_face_interface_test.GenericInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_face_interface_test.MultiCallableInvokerBlockingInvocationInlineServiceTest", 
-  "_face_interface_test.MultiCallableInvokerEventInvocationSynchronousEventServiceTest", 
   "_face_interface_test.MultiCallableInvokerFutureInvocationAsynchronousEventServiceTest", 
   "_implementations_test.ChannelCredentialsTest", 
   "_insecure_interop_test.InsecureInteropTest", 

src/python/grpcio/tests/unit/framework/interfaces/face/_event_invocation_synchronous_event_service.py

@@ -1,381 +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.
-
-"""Test code for the Face layer of RPC Framework."""
-
-import abc
-import unittest
-
-# test_interfaces is referenced from specification in this module.
-from grpc.framework.interfaces.face import face
-from tests.unit.framework.common import test_constants
-from tests.unit.framework.common import test_control
-from tests.unit.framework.common import test_coverage
-from tests.unit.framework.interfaces.face import _3069_test_constant
-from tests.unit.framework.interfaces.face import _digest
-from tests.unit.framework.interfaces.face import _receiver
-from tests.unit.framework.interfaces.face import _stock_service
-from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
-
-
-class TestCase(test_coverage.Coverage, unittest.TestCase):
-  """A test of the Face layer of RPC Framework.
-
-  Concrete subclasses must have an "implementation" attribute of type
-  test_interfaces.Implementation and an "invoker_constructor" attribute of type
-  _invocation.InvokerConstructor.
-  """
-  __metaclass__ = abc.ABCMeta
-
-  NAME = 'EventInvocationSynchronousEventServiceTest'
-
-  def setUp(self):
-    """See unittest.TestCase.setUp for full specification.
-
-    Overriding implementations must call this implementation.
-    """
-    self._control = test_control.PauseFailControl()
-    self._digest = _digest.digest(
-        _stock_service.STOCK_TEST_SERVICE, self._control, None)
-
-    generic_stub, dynamic_stubs, self._memo = self.implementation.instantiate(
-        self._digest.methods, self._digest.event_method_implementations, None)
-    self._invoker = self.invoker_constructor.construct_invoker(
-        generic_stub, dynamic_stubs, self._digest.methods)
-
-  def tearDown(self):
-    """See unittest.TestCase.tearDown for full specification.
-
-    Overriding implementations must call this implementation.
-    """
-    self._invoker = None
-    self.implementation.destantiate(self._memo)
-
-  def testSuccessfulUnaryRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        self._invoker.event(group, method)(
-            request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        receiver.block_until_terminated()
-        response = receiver.unary_response()
-
-        test_messages.verify(request, response, self)
-
-  def testSuccessfulUnaryRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        self._invoker.event(group, method)(
-            request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        receiver.block_until_terminated()
-        responses = receiver.stream_responses()
-
-        test_messages.verify(request, responses, self)
-
-  def testSuccessfulStreamRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        call_consumer = self._invoker.event(group, method)(
-            receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        for request in requests:
-          call_consumer.consume(request)
-        call_consumer.terminate()
-        receiver.block_until_terminated()
-        response = receiver.unary_response()
-
-        test_messages.verify(requests, response, self)
-
-  def testSuccessfulStreamRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        call_consumer = self._invoker.event(group, method)(
-            receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        for request in requests:
-          call_consumer.consume(request)
-        call_consumer.terminate()
-        receiver.block_until_terminated()
-        responses = receiver.stream_responses()
-
-        test_messages.verify(requests, responses, self)
-
-  def testSequentialInvocations(self):
-    # pylint: disable=cell-var-from-loop
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        first_request = test_messages.request()
-        second_request = test_messages.request()
-        second_receiver = _receiver.Receiver()
-
-        def make_second_invocation():
-          self._invoker.event(group, method)(
-              second_request, second_receiver, second_receiver.abort,
-              test_constants.LONG_TIMEOUT)
-
-        class FirstReceiver(_receiver.Receiver):
-
-          def complete(self, terminal_metadata, code, details):
-            super(FirstReceiver, self).complete(
-                terminal_metadata, code, details)
-            make_second_invocation()
-
-        first_receiver = FirstReceiver()
-
-        self._invoker.event(group, method)(
-            first_request, first_receiver, first_receiver.abort,
-            test_constants.LONG_TIMEOUT)
-        second_receiver.block_until_terminated()
-
-        first_response = first_receiver.unary_response()
-        second_response = second_receiver.unary_response()
-        test_messages.verify(first_request, first_response, self)
-        test_messages.verify(second_request, second_response, self)
-
-  def testParallelInvocations(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        first_request = test_messages.request()
-        first_receiver = _receiver.Receiver()
-        second_request = test_messages.request()
-        second_receiver = _receiver.Receiver()
-
-        self._invoker.event(group, method)(
-            first_request, first_receiver, first_receiver.abort,
-            test_constants.LONG_TIMEOUT)
-        self._invoker.event(group, method)(
-            second_request, second_receiver, second_receiver.abort,
-            test_constants.LONG_TIMEOUT)
-        first_receiver.block_until_terminated()
-        second_receiver.block_until_terminated()
-
-        first_response = first_receiver.unary_response()
-        second_response = second_receiver.unary_response()
-        test_messages.verify(first_request, first_response, self)
-        test_messages.verify(second_request, second_response, self)
-
-  @unittest.skip('TODO(nathaniel): implement.')
-  def testWaitingForSomeButNotAllParallelInvocations(self):
-    raise NotImplementedError()
-
-  def testCancelledUnaryRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        with self._control.pause():
-          call = self._invoker.event(group, method)(
-              request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-          call.cancel()
-          receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.CANCELLED, receiver.abortion().kind)
-
-  def testCancelledUnaryRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        call = self._invoker.event(group, method)(
-            request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        call.cancel()
-        receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.CANCELLED, receiver.abortion().kind)
-
-  def testCancelledStreamRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        call_consumer = self._invoker.event(group, method)(
-            receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        for request in requests:
-          call_consumer.consume(request)
-        call_consumer.cancel()
-        receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.CANCELLED, receiver.abortion().kind)
-
-  def testCancelledStreamRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
-      for unused_test_messages in test_messages_sequence:
-        receiver = _receiver.Receiver()
-
-        call_consumer = self._invoker.event(group, method)(
-            receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-        call_consumer.cancel()
-        receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.CANCELLED, receiver.abortion().kind)
-
-  def testExpiredUnaryRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        with self._control.pause():
-          self._invoker.event(group, method)(
-              request, receiver, receiver.abort,
-              _3069_test_constant.REALLY_SHORT_TIMEOUT)
-          receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.EXPIRED, receiver.abortion().kind)
-
-  def testExpiredUnaryRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        with self._control.pause():
-          self._invoker.event(group, method)(
-              request, receiver, receiver.abort,
-              _3069_test_constant.REALLY_SHORT_TIMEOUT)
-          receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.EXPIRED, receiver.abortion().kind)
-
-  def testExpiredStreamRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
-      for unused_test_messages in test_messages_sequence:
-        receiver = _receiver.Receiver()
-
-        self._invoker.event(group, method)(
-            receiver, receiver.abort, _3069_test_constant.REALLY_SHORT_TIMEOUT)
-        receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.EXPIRED, receiver.abortion().kind)
-
-  def testExpiredStreamRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        call_consumer = self._invoker.event(group, method)(
-            receiver, receiver.abort, _3069_test_constant.REALLY_SHORT_TIMEOUT)
-        for request in requests:
-          call_consumer.consume(request)
-        receiver.block_until_terminated()
-
-        self.assertIs(face.Abortion.Kind.EXPIRED, receiver.abortion().kind)
-
-  def testFailedUnaryRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        with self._control.fail():
-          self._invoker.event(group, method)(
-              request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-          receiver.block_until_terminated()
-
-        self.assertIs(
-            face.Abortion.Kind.REMOTE_FAILURE, receiver.abortion().kind)
-
-  def testFailedUnaryRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.unary_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        request = test_messages.request()
-        receiver = _receiver.Receiver()
-
-        with self._control.fail():
-          self._invoker.event(group, method)(
-              request, receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-          receiver.block_until_terminated()
-
-        self.assertIs(
-            face.Abortion.Kind.REMOTE_FAILURE, receiver.abortion().kind)
-
-  def testFailedStreamRequestUnaryResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_unary_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        with self._control.fail():
-          call_consumer = self._invoker.event(group, method)(
-              receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-          for request in requests:
-            call_consumer.consume(request)
-          call_consumer.terminate()
-          receiver.block_until_terminated()
-
-        self.assertIs(
-            face.Abortion.Kind.REMOTE_FAILURE, receiver.abortion().kind)
-
-  def testFailedStreamRequestStreamResponse(self):
-    for (group, method), test_messages_sequence in (
-        self._digest.stream_stream_messages_sequences.iteritems()):
-      for test_messages in test_messages_sequence:
-        requests = test_messages.requests()
-        receiver = _receiver.Receiver()
-
-        with self._control.fail():
-          call_consumer = self._invoker.event(group, method)(
-              receiver, receiver.abort, test_constants.LONG_TIMEOUT)
-          for request in requests:
-            call_consumer.consume(request)
-          call_consumer.terminate()
-          receiver.block_until_terminated()
-
-        self.assertIs(
-            face.Abortion.Kind.REMOTE_FAILURE, receiver.abortion().kind)

src/python/grpcio/tests/unit/framework/interfaces/face/test_cases.py

@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -34,14 +34,12 @@ import unittest  # pylint: disable=unused-import
 
 # test_interfaces is referenced from specification in this module.
 from tests.unit.framework.interfaces.face import _blocking_invocation_inline_service
-from tests.unit.framework.interfaces.face import _event_invocation_synchronous_event_service
 from tests.unit.framework.interfaces.face import _future_invocation_asynchronous_event_service
 from tests.unit.framework.interfaces.face import _invocation
 from tests.unit.framework.interfaces.face import test_interfaces  # pylint: disable=unused-import
 
 _TEST_CASE_SUPERCLASSES = (
     _blocking_invocation_inline_service.TestCase,
-    _event_invocation_synchronous_event_service.TestCase,
     _future_invocation_asynchronous_event_service.TestCase,
 )
 

templates/package.xml.template

@@ -29,9 +29,9 @@
    <contents>
     <dir baseinstalldir="/" name="/">
       <file baseinstalldir="/" name="config.m4" role="src" />
+      <file baseinstalldir="/" name="src/php/README.md" role="src" />
       <file baseinstalldir="/" name="src/php/ext/grpc/CREDITS" role="src" />
       <file baseinstalldir="/" name="src/php/ext/grpc/LICENSE" role="src" />
-      <file baseinstalldir="/" name="src/php/ext/grpc/README.md" role="src" />
       % for source in php_config_m4.src + php_config_m4.headers:
       <file baseinstalldir="/" name="${source}" role="src" />
       % endfor

templates/tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile.template

@@ -0,0 +1,39 @@
+%YAML 1.2
+--- |
+  # Copyright 2015-2016, Google Inc.
+  # All rights reserved.
+  #
+  # Redistribution and use in source and binary forms, with or without
+  # modification, are permitted provided that the following conditions are
+  # met:
+  #
+  #     * Redistributions of source code must retain the above copyright
+  # notice, this list of conditions and the following disclaimer.
+  #     * Redistributions in binary form must reproduce the above
+  # copyright notice, this list of conditions and the following disclaimer
+  # in the documentation and/or other materials provided with the
+  # distribution.
+  #     * Neither the name of Google Inc. nor the names of its
+  # contributors may be used to endorse or promote products derived from
+  # this software without specific prior written permission.
+  #
+  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+  FROM ubuntu:14.04
+  
+  <%include file="../../apt_get_basic.include"/>
+  <%include file="../../cxx_deps.include"/>
+  <%include file="../../run_tests_addons.include"/>
+  # Define the default command.
+  CMD ["bash"]
+  

templates/tools/dockerfile/test/multilang_jessie_x64/Dockerfile.template

@@ -0,0 +1,43 @@
+%YAML 1.2
+--- |
+  # Copyright 2016, Google Inc.
+  # All rights reserved.
+  #
+  # Redistribution and use in source and binary forms, with or without
+  # modification, are permitted provided that the following conditions are
+  # met:
+  #
+  #     * Redistributions of source code must retain the above copyright
+  # notice, this list of conditions and the following disclaimer.
+  #     * Redistributions in binary form must reproduce the above
+  # copyright notice, this list of conditions and the following disclaimer
+  # in the documentation and/or other materials provided with the
+  # distribution.
+  #     * Neither the name of Google Inc. nor the names of its
+  # contributors may be used to endorse or promote products derived from
+  # this software without specific prior written permission.
+  #
+  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  
+  FROM debian:jessie
+  
+  <%include file="../../apt_get_basic.include"/>
+  <%include file="../../csharp_deps.include"/>
+  <%include file="../../cxx_deps.include"/>
+  <%include file="../../node_deps.include"/>
+  <%include file="../../php_deps.include"/>
+  <%include file="../../ruby_deps.include"/>
+  <%include file="../../python_deps.include"/>
+  <%include file="../../run_tests_addons.include"/>
+  # Define the default command.
+  CMD ["bash"]

test/core/client_config/resolvers/dns_resolver_connectivity_test.c

@@ -0,0 +1,148 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/client_config/resolvers/dns_resolver.h"
+
+#include <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+
+#include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/timer.h"
+#include "test/core/util/test_config.h"
+
+static void subchannel_factory_ref(grpc_subchannel_factory *scv) {}
+static void subchannel_factory_unref(grpc_exec_ctx *exec_ctx,
+                                     grpc_subchannel_factory *scv) {}
+static grpc_subchannel *subchannel_factory_create_subchannel(
+    grpc_exec_ctx *exec_ctx, grpc_subchannel_factory *factory,
+    grpc_subchannel_args *args) {
+  return NULL;
+}
+
+static const grpc_subchannel_factory_vtable sc_vtable = {
+    subchannel_factory_ref, subchannel_factory_unref,
+    subchannel_factory_create_subchannel};
+
+static grpc_subchannel_factory sc_factory = {&sc_vtable};
+
+static gpr_mu g_mu;
+static bool g_fail_resolution = true;
+
+static grpc_resolved_addresses *my_resolve_address(const char *name,
+                                                   const char *addr) {
+  gpr_mu_lock(&g_mu);
+  GPR_ASSERT(0 == strcmp("test", name));
+  if (g_fail_resolution) {
+    g_fail_resolution = false;
+    gpr_mu_unlock(&g_mu);
+    return NULL;
+  } else {
+    gpr_mu_unlock(&g_mu);
+    grpc_resolved_addresses *addrs = gpr_malloc(sizeof(*addrs));
+    addrs->naddrs = 1;
+    addrs->addrs = gpr_malloc(sizeof(*addrs->addrs));
+    addrs->addrs[0].len = 123;
+    return addrs;
+  }
+}
+
+static grpc_resolver *create_resolver(const char *name) {
+  grpc_resolver_factory *factory = grpc_dns_resolver_factory_create();
+  grpc_uri *uri = grpc_uri_parse(name, 0);
+  GPR_ASSERT(uri);
+  grpc_resolver_args args;
+  memset(&args, 0, sizeof(args));
+  args.uri = uri;
+  args.subchannel_factory = &sc_factory;
+  grpc_resolver *resolver =
+      grpc_resolver_factory_create_resolver(factory, &args);
+  grpc_resolver_factory_unref(factory);
+  grpc_uri_destroy(uri);
+  return resolver;
+}
+
+static void on_done(grpc_exec_ctx *exec_ctx, void *ev, bool success) {
+  gpr_event_set(ev, (void *)1);
+}
+
+// interleave waiting for an event with a timer check
+static bool wait_loop(int deadline_seconds, gpr_event *ev) {
+  while (deadline_seconds) {
+    gpr_log(GPR_DEBUG, "Test: waiting for %d more seconds", deadline_seconds);
+    if (gpr_event_wait(ev, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1))) return true;
+    deadline_seconds--;
+
+    grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+    grpc_timer_check(&exec_ctx, gpr_now(GPR_CLOCK_MONOTONIC), NULL);
+    grpc_exec_ctx_finish(&exec_ctx);
+  }
+  return false;
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+
+  grpc_init();
+  gpr_mu_init(&g_mu);
+  grpc_blocking_resolve_address = my_resolve_address;
+
+  grpc_resolver *resolver = create_resolver("dns:test");
+
+  grpc_client_config *config = (grpc_client_config *)1;
+
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  gpr_event ev1;
+  gpr_event_init(&ev1);
+  grpc_resolver_next(&exec_ctx, resolver, &config,
+                     grpc_closure_create(on_done, &ev1));
+  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(wait_loop(5, &ev1));
+  GPR_ASSERT(config == NULL);
+
+  gpr_event ev2;
+  gpr_event_init(&ev2);
+  grpc_resolver_next(&exec_ctx, resolver, &config,
+                     grpc_closure_create(on_done, &ev2));
+  grpc_exec_ctx_flush(&exec_ctx);
+  GPR_ASSERT(wait_loop(30, &ev2));
+  GPR_ASSERT(config != NULL);
+
+  grpc_client_config_unref(&exec_ctx, config);
+  GRPC_RESOLVER_UNREF(&exec_ctx, resolver, "test");
+  grpc_exec_ctx_finish(&exec_ctx);
+
+  grpc_shutdown();
+  gpr_mu_destroy(&g_mu);
+}

test/core/support/thd_test.c

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,8 @@
 #include <grpc/support/time.h>
 #include "test/core/util/test_config.h"
 
+#define NUM_THREADS 300
+
 struct test {
   gpr_mu mu;
   int n;
@@ -79,15 +81,14 @@ static void test_options(void) {
 static void test(void) {
   int i;
   gpr_thd_id thd;
-  gpr_thd_id thds[1000];
+  gpr_thd_id thds[NUM_THREADS];
   struct test t;
-  int n = 1000;
   gpr_thd_options options = gpr_thd_options_default();
   gpr_mu_init(&t.mu);
   gpr_cv_init(&t.done_cv);
-  t.n = n;
+  t.n = NUM_THREADS;
   t.is_done = 0;
-  for (i = 0; i != n; i++) {
+  for (i = 0; i < NUM_THREADS; i++) {
     GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, NULL));
   }
   gpr_mu_lock(&t.mu);
@@ -97,10 +98,10 @@ static void test(void) {
   gpr_mu_unlock(&t.mu);
   GPR_ASSERT(t.n == 0);
   gpr_thd_options_set_joinable(&options);
-  for (i = 0; i < n; i++) {
+  for (i = 0; i < NUM_THREADS; i++) {
     GPR_ASSERT(gpr_thd_new(&thds[i], &thd_body_joinable, NULL, &options));
   }
-  for (i = 0; i < n; i++) {
+  for (i = 0; i < NUM_THREADS; i++) {
     gpr_thd_join(thds[i]);
   }
 }

test/core/surface/concurrent_connectivity_test.c

@@ -0,0 +1,83 @@
+/*
+*
+* Copyright 2016, Google Inc.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*
+*     * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+*     * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following disclaimer
+* in the documentation and/or other materials provided with the
+* distribution.
+*     * Neither the name of Google Inc. nor the names of its
+* contributors may be used to endorse or promote products derived from
+* this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+
+#include <stdio.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include "test/core/util/test_config.h"
+
+#define NUM_THREADS 100
+static grpc_channel* channels[NUM_THREADS];
+static grpc_completion_queue* queues[NUM_THREADS];
+
+void create_loop_destroy(void* actually_an_int) {
+  int thread_index = (int)(intptr_t)(actually_an_int);
+  for (int i = 0; i < 10; ++i) {
+    grpc_completion_queue* cq = grpc_completion_queue_create(NULL);
+    grpc_channel* chan = grpc_insecure_channel_create("localhost", NULL, NULL);
+
+    channels[thread_index] = chan;
+    queues[thread_index] = cq;
+
+    for (int j = 0; j < 10; ++j) {
+      gpr_timespec later_time = GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10);
+      grpc_connectivity_state state =
+          grpc_channel_check_connectivity_state(chan, 1);
+      grpc_channel_watch_connectivity_state(chan, state, later_time, cq, NULL);
+      GPR_ASSERT(grpc_completion_queue_next(cq,
+                                            GRPC_TIMEOUT_SECONDS_TO_DEADLINE(3),
+                                            NULL).type == GRPC_OP_COMPLETE);
+    }
+    grpc_channel_destroy(channels[thread_index]);
+    grpc_completion_queue_destroy(queues[thread_index]);
+  }
+}
+
+int main(int argc, char** argv) {
+  grpc_test_init(argc, argv);
+  grpc_init();
+  gpr_thd_id threads[NUM_THREADS];
+  for (intptr_t i = 0; i < NUM_THREADS; ++i) {
+    gpr_thd_options options = gpr_thd_options_default();
+    gpr_thd_options_set_joinable(&options);
+    gpr_thd_new(&threads[i], create_loop_destroy, (void*)i, &options);
+  }
+  for (int i = 0; i < NUM_THREADS; ++i) {
+    gpr_thd_join(threads[i]);
+  }
+  grpc_shutdown();
+  return 0;
+}

test/core/tsi/transport_security_test.c

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -61,35 +61,37 @@ typedef struct {
      of '#' will be replaced with a null character before processing. */
   const char *dns_names;
 
+  /* Comma separated list of IP SANs to match aggainst */
+  const char *ip_names;
 } cert_name_test_entry;
 
 /* Largely inspired from:
    chromium/src/net/cert/x509_certificate_unittest.cc.
    TODO(jboeuf) uncomment test cases as we fix tsi_ssl_peer_matches_name. */
 const cert_name_test_entry cert_name_test_entries[] = {
-    {1, "foo.com", "foo.com", NULL},
-    {1, "f", "f", NULL},
-    {0, "h", "i", NULL},
-    {1, "bar.foo.com", "*.foo.com", NULL},
+    {1, "foo.com", "foo.com", NULL, NULL},
+    {1, "f", "f", NULL, NULL},
+    {0, "h", "i", NULL, NULL},
+    {1, "bar.foo.com", "*.foo.com", NULL, NULL},
     {1, "www.test.fr", "common.name",
-     "*.test.com,*.test.co.uk,*.test.de,*.test.fr"},
+     "*.test.com,*.test.co.uk,*.test.de,*.test.fr", NULL},
     /*
        {1, "wwW.tESt.fr", "common.name", ",*.*,*.test.de,*.test.FR,www"},
      */
-    {0, "f.uk", ".uk", NULL},
-    {0, "w.bar.foo.com", "?.bar.foo.com", NULL},
-    {0, "www.foo.com", "(www|ftp).foo.com", NULL},
-    {0, "www.foo.com", "www.foo.com#", NULL}, /* # = null char. */
-    {0, "www.foo.com", "", "www.foo.com#*.foo.com,#,#"},
-    {0, "www.house.example", "ww.house.example", NULL},
-    {0, "test.org", "", "www.test.org,*.test.org,*.org"},
-    {0, "w.bar.foo.com", "w*.bar.foo.com", NULL},
-    {0, "www.bar.foo.com", "ww*ww.bar.foo.com", NULL},
-    {0, "wwww.bar.foo.com", "ww*ww.bar.foo.com", NULL},
-    {0, "wwww.bar.foo.com", "w*w.bar.foo.com", NULL},
-    {0, "wwww.bar.foo.com", "w*w.bar.foo.c0m", NULL},
-    {0, "WALLY.bar.foo.com", "wa*.bar.foo.com", NULL},
-    {0, "wally.bar.foo.com", "*Ly.bar.foo.com", NULL},
+    {0, "f.uk", ".uk", NULL, NULL},
+    {0, "w.bar.foo.com", "?.bar.foo.com", NULL, NULL},
+    {0, "www.foo.com", "(www|ftp).foo.com", NULL, NULL},
+    {0, "www.foo.com", "www.foo.com#", NULL, NULL}, /* # = null char. */
+    {0, "www.foo.com", "", "www.foo.com#*.foo.com,#,#", NULL},
+    {0, "www.house.example", "ww.house.example", NULL, NULL},
+    {0, "test.org", "", "www.test.org,*.test.org,*.org", NULL},
+    {0, "w.bar.foo.com", "w*.bar.foo.com", NULL, NULL},
+    {0, "www.bar.foo.com", "ww*ww.bar.foo.com", NULL, NULL},
+    {0, "wwww.bar.foo.com", "ww*ww.bar.foo.com", NULL, NULL},
+    {0, "wwww.bar.foo.com", "w*w.bar.foo.com", NULL, NULL},
+    {0, "wwww.bar.foo.com", "w*w.bar.foo.c0m", NULL, NULL},
+    {0, "WALLY.bar.foo.com", "wa*.bar.foo.com", NULL, NULL},
+    {0, "wally.bar.foo.com", "*Ly.bar.foo.com", NULL, NULL},
     /*
        {1, "ww%57.foo.com", "", "www.foo.com"},
        {1, "www&.foo.com", "www%26.foo.com", NULL},
@@ -97,94 +99,108 @@ const cert_name_test_entry cert_name_test_entries[] = {
 
     /* Common name must not be used if subject alternative name was provided. */
     {0, "www.test.co.jp", "www.test.co.jp",
-     "*.test.de,*.jp,www.test.co.uk,www.*.co.jp"},
+     "*.test.de,*.jp,www.test.co.uk,www.*.co.jp", NULL},
     {0, "www.bar.foo.com", "www.bar.foo.com",
-     "*.foo.com,*.*.foo.com,*.*.bar.foo.com,*..bar.foo.com,"},
+     "*.foo.com,*.*.foo.com,*.*.bar.foo.com,*..bar.foo.com,", NULL},
 
     /* IDN tests */
-    {1, "xn--poema-9qae5a.com.br", "xn--poema-9qae5a.com.br", NULL},
-    {1, "www.xn--poema-9qae5a.com.br", "*.xn--poema-9qae5a.com.br", NULL},
+    {1, "xn--poema-9qae5a.com.br", "xn--poema-9qae5a.com.br", NULL, NULL},
+    {1, "www.xn--poema-9qae5a.com.br", "*.xn--poema-9qae5a.com.br", NULL, NULL},
     {0, "xn--poema-9qae5a.com.br", "",
      "*.xn--poema-9qae5a.com.br,"
      "xn--poema-*.com.br,"
      "xn--*-9qae5a.com.br,"
-     "*--poema-9qae5a.com.br"},
+     "*--poema-9qae5a.com.br",
+     NULL},
 
     /* The following are adapted from the  examples quoted from
        http://tools.ietf.org/html/rfc6125#section-6.4.3
        (e.g., *.example.com would match foo.example.com but
        not bar.foo.example.com or example.com). */
-    {1, "foo.example.com", "*.example.com", NULL},
-    {0, "bar.foo.example.com", "*.example.com", NULL},
-    {0, "example.com", "*.example.com", NULL},
+    {1, "foo.example.com", "*.example.com", NULL, NULL},
+    {0, "bar.foo.example.com", "*.example.com", NULL, NULL},
+    {0, "example.com", "*.example.com", NULL, NULL},
 
     /* Partial wildcards are disallowed, though RFC 2818 rules allow them.
        That is, forms such as baz*.example.net, *baz.example.net, and
        b*z.example.net should NOT match domains. Instead, the wildcard must
        always be the left-most label, and only a single label. */
-    {0, "baz1.example.net", "baz*.example.net", NULL},
-    {0, "foobaz.example.net", "*baz.example.net", NULL},
-    {0, "buzz.example.net", "b*z.example.net", NULL},
-    {0, "www.test.example.net", "www.*.example.net", NULL},
+    {0, "baz1.example.net", "baz*.example.net", NULL, NULL},
+    {0, "foobaz.example.net", "*baz.example.net", NULL, NULL},
+    {0, "buzz.example.net", "b*z.example.net", NULL, NULL},
+    {0, "www.test.example.net", "www.*.example.net", NULL, NULL},
 
     /* Wildcards should not be valid for public registry controlled domains,
        and unknown/unrecognized domains, at least three domain components must
        be present. */
-    {1, "www.test.example", "*.test.example", NULL},
-    {1, "test.example.co.uk", "*.example.co.uk", NULL},
-    {0, "test.example", "*.example", NULL},
+    {1, "www.test.example", "*.test.example", NULL, NULL},
+    {1, "test.example.co.uk", "*.example.co.uk", NULL, NULL},
+    {0, "test.example", "*.example", NULL, NULL},
     /*
        {0, "example.co.uk", "*.co.uk", NULL},
      */
-    {0, "foo.com", "*.com", NULL},
-    {0, "foo.us", "*.us", NULL},
-    {0, "foo", "*", NULL},
+    {0, "foo.com", "*.com", NULL, NULL},
+    {0, "foo.us", "*.us", NULL, NULL},
+    {0, "foo", "*", NULL, NULL},
 
     /* IDN variants of wildcards and registry controlled domains. */
-    {1, "www.xn--poema-9qae5a.com.br", "*.xn--poema-9qae5a.com.br", NULL},
-    {1, "test.example.xn--mgbaam7a8h", "*.example.xn--mgbaam7a8h", NULL},
+    {1, "www.xn--poema-9qae5a.com.br", "*.xn--poema-9qae5a.com.br", NULL, NULL},
+    {1, "test.example.xn--mgbaam7a8h", "*.example.xn--mgbaam7a8h", NULL, NULL},
     /*
        {0, "xn--poema-9qae5a.com.br", "*.com.br", NULL},
      */
-    {0, "example.xn--mgbaam7a8h", "*.xn--mgbaam7a8h", NULL},
+    {0, "example.xn--mgbaam7a8h", "*.xn--mgbaam7a8h", NULL, NULL},
 
     /* Wildcards should be permissible for 'private' registry controlled
        domains. */
-    {1, "www.appspot.com", "*.appspot.com", NULL},
-    {1, "foo.s3.amazonaws.com", "*.s3.amazonaws.com", NULL},
+    {1, "www.appspot.com", "*.appspot.com", NULL, NULL},
+    {1, "foo.s3.amazonaws.com", "*.s3.amazonaws.com", NULL, NULL},
 
     /* Multiple wildcards are not valid. */
-    {0, "foo.example.com", "*.*.com", NULL},
-    {0, "foo.bar.example.com", "*.bar.*.com", NULL},
+    {0, "foo.example.com", "*.*.com", NULL, NULL},
+    {0, "foo.bar.example.com", "*.bar.*.com", NULL, NULL},
 
     /* Absolute vs relative DNS name tests. Although not explicitly specified
        in RFC 6125, absolute reference names (those ending in a .) should
        match either absolute or relative presented names. */
-    {1, "foo.com", "foo.com.", NULL},
-    {1, "foo.com.", "foo.com", NULL},
-    {1, "foo.com.", "foo.com.", NULL},
-    {1, "f", "f.", NULL},
-    {1, "f.", "f", NULL},
-    {1, "f.", "f.", NULL},
-    {1, "www-3.bar.foo.com", "*.bar.foo.com.", NULL},
-    {1, "www-3.bar.foo.com.", "*.bar.foo.com", NULL},
-    {1, "www-3.bar.foo.com.", "*.bar.foo.com.", NULL},
-    {0, ".", ".", NULL},
-    {0, "example.com", "*.com.", NULL},
-    {0, "example.com.", "*.com", NULL},
-    {0, "example.com.", "*.com.", NULL},
-    {0, "foo.", "*.", NULL},
-    {0, "foo", "*.", NULL},
+    {1, "foo.com", "foo.com.", NULL, NULL},
+    {1, "foo.com.", "foo.com", NULL, NULL},
+    {1, "foo.com.", "foo.com.", NULL, NULL},
+    {1, "f", "f.", NULL, NULL},
+    {1, "f.", "f", NULL, NULL},
+    {1, "f.", "f.", NULL, NULL},
+    {1, "www-3.bar.foo.com", "*.bar.foo.com.", NULL, NULL},
+    {1, "www-3.bar.foo.com.", "*.bar.foo.com", NULL, NULL},
+    {1, "www-3.bar.foo.com.", "*.bar.foo.com.", NULL, NULL},
+    {0, ".", ".", NULL, NULL},
+    {0, "example.com", "*.com.", NULL, NULL},
+    {0, "example.com.", "*.com", NULL, NULL},
+    {0, "example.com.", "*.com.", NULL, NULL},
+    {0, "foo.", "*.", NULL, NULL},
+    {0, "foo", "*.", NULL, NULL},
     /*
        {0, "foo.co.uk", "*.co.uk.", NULL},
        {0, "foo.co.uk.", "*.co.uk.", NULL},
      */
 
     /* An empty CN is OK. */
-    {1, "test.foo.com", "", "test.foo.com"},
+    {1, "test.foo.com", "", "test.foo.com", NULL},
 
     /* An IP should not be used for the CN. */
-    {0, "173.194.195.139", "173.194.195.139", NULL},
+    {0, "173.194.195.139", "173.194.195.139", NULL, NULL},
+    /* An IP can be used if the SAN IP is present */
+    {1, "173.194.195.139", "foo.example.com", NULL, "173.194.195.139"},
+    {0, "173.194.195.139", "foo.example.com", NULL, "8.8.8.8"},
+    {0, "173.194.195.139", "foo.example.com", NULL, "8.8.8.8,8.8.4.4"},
+    {1, "173.194.195.139", "foo.example.com", NULL, "8.8.8.8,173.194.195.139"},
+    {0, "173.194.195.139", "foo.example.com", NULL, "173.194.195.13"},
+    {0, "2001:db8:a0b:12f0::1", "foo.example.com", NULL, "173.194.195.13"},
+    {1, "2001:db8:a0b:12f0::1", "foo.example.com", NULL,
+     "2001:db8:a0b:12f0::1"},
+    {0, "2001:db8:a0b:12f0::1", "foo.example.com", NULL,
+     "2001:db8:a0b:12f0::2"},
+    {1, "2001:db8:a0b:12f0::1", "foo.example.com", NULL,
+     "2001:db8:a0b:12f0::2,2001:db8:a0b:12f0::1,8.8.8.8"},
 };
 
 typedef struct name_list {
@@ -196,7 +212,7 @@ typedef struct {
   size_t name_count;
   char *buffer;
   name_list *names;
-} parsed_dns_names;
+} parsed_names;
 
 name_list *name_list_add(const char *n) {
   name_list *result = gpr_malloc(sizeof(name_list));
@@ -205,18 +221,18 @@ name_list *name_list_add(const char *n) {
   return result;
 }
 
-static parsed_dns_names parse_dns_names(const char *dns_names_str) {
-  parsed_dns_names result;
+static parsed_names parse_names(const char *names_str) {
+  parsed_names result;
   name_list *current_nl;
   size_t i;
-  memset(&result, 0, sizeof(parsed_dns_names));
-  if (dns_names_str == 0) return result;
+  memset(&result, 0, sizeof(parsed_names));
+  if (names_str == 0) return result;
   result.name_count = 1;
-  result.buffer = gpr_strdup(dns_names_str);
+  result.buffer = gpr_strdup(names_str);
   result.names = name_list_add(result.buffer);
   current_nl = result.names;
-  for (i = 0; i < strlen(dns_names_str); i++) {
-    if (dns_names_str[i] == ',') {
+  for (i = 0; i < strlen(names_str); i++) {
+    if (names_str[i] == ',') {
       result.buffer[i] = '\0';
       result.name_count++;
       i++;
@@ -227,7 +243,7 @@ static parsed_dns_names parse_dns_names(const char *dns_names_str) {
   return result;
 }
 
-static void destruct_parsed_dns_names(parsed_dns_names *pdn) {
+static void destruct_parsed_names(parsed_names *pdn) {
   name_list *nl = pdn->names;
   if (pdn->buffer != NULL) gpr_free(pdn->buffer);
   while (nl != NULL) {
@@ -237,8 +253,8 @@ static void destruct_parsed_dns_names(parsed_dns_names *pdn) {
   }
 }
 
-static char *processed_dns_name(const char *dns_name) {
-  char *result = gpr_strdup(dns_name);
+static char *processed_name(const char *name) {
+  char *result = gpr_strdup(name);
   size_t i;
   for (i = 0; i < strlen(result); i++) {
     if (result[i] == '#') {
@@ -253,31 +269,48 @@ static tsi_peer peer_from_cert_name_test_entry(
   size_t i;
   tsi_peer peer;
   name_list *nl;
-  parsed_dns_names dns_entries = parse_dns_names(entry->dns_names);
+  parsed_names dns_entries = parse_names(entry->dns_names);
+  parsed_names ip_entries = parse_names(entry->ip_names);
   nl = dns_entries.names;
-  GPR_ASSERT(tsi_construct_peer(1 + dns_entries.name_count, &peer) == TSI_OK);
+  GPR_ASSERT(tsi_construct_peer(
+                 1 + dns_entries.name_count + ip_entries.name_count, &peer) ==
+             TSI_OK);
   GPR_ASSERT(tsi_construct_string_peer_property_from_cstring(
                  TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY, entry->common_name,
                  &peer.properties[0]) == TSI_OK);
   i = 1;
   while (nl != NULL) {
-    char *processed = processed_dns_name(nl->name);
+    char *processed = processed_name(nl->name);
     GPR_ASSERT(tsi_construct_string_peer_property(
                    TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, processed,
                    strlen(nl->name), &peer.properties[i++]) == TSI_OK);
     nl = nl->next;
     gpr_free(processed);
   }
-  destruct_parsed_dns_names(&dns_entries);
+
+  nl = ip_entries.names;
+  while (nl != NULL) {
+    char *processed = processed_name(nl->name);
+    GPR_ASSERT(tsi_construct_string_peer_property(
+                   TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY, processed,
+                   strlen(nl->name), &peer.properties[i++]) == TSI_OK);
+    nl = nl->next;
+    gpr_free(processed);
+  }
+  destruct_parsed_names(&dns_entries);
+  destruct_parsed_names(&ip_entries);
   return peer;
 }
 
 char *cert_name_test_entry_to_string(const cert_name_test_entry *entry) {
   char *s;
-  gpr_asprintf(
-      &s, "{ success = %s, host_name = %s, common_name = %s, dns_names = %s}",
-      entry->expected ? "true" : "false", entry->host_name, entry->common_name,
-      entry->dns_names != NULL ? entry->dns_names : "");
+  gpr_asprintf(&s,
+               "{ success = %s, host_name = %s, common_name = %s, dns_names = "
+               "%s, ip_names = %s}",
+               entry->expected ? "true" : "false", entry->host_name,
+               entry->common_name,
+               entry->dns_names != NULL ? entry->dns_names : "",
+               entry->ip_names != NULL ? entry->ip_names : "");
   return s;
 }
 

test/cpp/end2end/async_end2end_test.cc

@@ -68,6 +68,7 @@ namespace testing {
 namespace {
 
 void* tag(int i) { return (void*)(intptr_t)i; }
+int detag(void* p) { return static_cast<int>(reinterpret_cast<intptr_t>(p)); }
 
 #ifdef GPR_POSIX_SOCKET
 static int maybe_assert_non_blocking_poll(struct pollfd* pfds, nfds_t nfds,
@@ -106,37 +107,50 @@ class PollingOverrider {
 class Verifier {
  public:
   explicit Verifier(bool spin) : spin_(spin) {}
+  // Expect sets the expected ok value for a specific tag
   Verifier& Expect(int i, bool expect_ok) {
     expectations_[tag(i)] = expect_ok;
     return *this;
   }
 
+  // Next waits for 1 async tag to complete, checks its
+  // expectations, and returns the tag
+  int Next(CompletionQueue* cq, bool ignore_ok) {
+    bool ok;
+    void* got_tag;
+    if (spin_) {
+      for (;;) {
+        auto r = cq->AsyncNext(&got_tag, &ok, gpr_time_0(GPR_CLOCK_REALTIME));
+        if (r == CompletionQueue::TIMEOUT) continue;
+        if (r == CompletionQueue::GOT_EVENT) break;
+        gpr_log(GPR_ERROR, "unexpected result from AsyncNext");
+        abort();
+      }
+    } else {
+      EXPECT_TRUE(cq->Next(&got_tag, &ok));
+    }
+    auto it = expectations_.find(got_tag);
+    EXPECT_TRUE(it != expectations_.end());
+    if (!ignore_ok) {
+      EXPECT_EQ(it->second, ok);
+    }
+    expectations_.erase(it);
+    return detag(got_tag);
+  }
+
+  // Verify keeps calling Next until all currently set
+  // expected tags are complete
   void Verify(CompletionQueue* cq) { Verify(cq, false); }
 
+  // This version of Verify allows optionally ignoring the
+  // outcome of the expectation
   void Verify(CompletionQueue* cq, bool ignore_ok) {
     GPR_ASSERT(!expectations_.empty());
     while (!expectations_.empty()) {
-      bool ok;
-      void* got_tag;
-      if (spin_) {
-        for (;;) {
-          auto r = cq->AsyncNext(&got_tag, &ok, gpr_time_0(GPR_CLOCK_REALTIME));
-          if (r == CompletionQueue::TIMEOUT) continue;
-          if (r == CompletionQueue::GOT_EVENT) break;
-          gpr_log(GPR_ERROR, "unexpected result from AsyncNext");
-          abort();
-        }
-      } else {
-        EXPECT_TRUE(cq->Next(&got_tag, &ok));
-      }
-      auto it = expectations_.find(got_tag);
-      EXPECT_TRUE(it != expectations_.end());
-      if (!ignore_ok) {
-        EXPECT_EQ(it->second, ok);
-      }
-      expectations_.erase(it);
+      Next(cq, ignore_ok);
     }
   }
+  // This version of Verify stops after a certain deadline
   void Verify(CompletionQueue* cq,
               std::chrono::system_clock::time_point deadline) {
     if (expectations_.empty()) {
@@ -793,7 +807,8 @@ TEST_P(AsyncEnd2endTest, UnimplementedRpc) {
 }
 
 // This class is for testing scenarios where RPCs are cancelled on the server
-// by calling ServerContext::TryCancel()
+// by calling ServerContext::TryCancel(). Server uses AsyncNotifyWhenDone
+// API to check for cancellation
 class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
  protected:
   typedef enum {
@@ -803,13 +818,6 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     CANCEL_AFTER_PROCESSING
   } ServerTryCancelRequestPhase;
 
-  void ServerTryCancel(ServerContext* context) {
-    EXPECT_FALSE(context->IsCancelled());
-    context->TryCancel();
-    gpr_log(GPR_INFO, "Server called TryCancel()");
-    EXPECT_TRUE(context->IsCancelled());
-  }
-
   // Helper for testing client-streaming RPCs which are cancelled on the server.
   // Depending on the value of server_try_cancel parameter, this will test one
   // of the following three scenarios:
@@ -843,6 +851,7 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     // On the server, request to be notified of 'RequestStream' calls
     // and receive the 'RequestStream' call just made by the client
+    srv_ctx.AsyncNotifyWhenDone(tag(11));
     service_.RequestRequestStream(&srv_ctx, &srv_stream, cq_.get(), cq_.get(),
                                   tag(2));
     Verifier(GetParam()).Expect(2, true).Verify(cq_.get());
@@ -858,9 +867,12 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     bool expected_server_cq_result = true;
     bool ignore_cq_result = false;
+    bool want_done_tag = false;
 
     if (server_try_cancel == CANCEL_BEFORE_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      Verifier(GetParam()).Expect(11, true).Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
 
       // Since cancellation is done before server reads any results, we know
       // for sure that all cq results will return false from this point forward
@@ -868,22 +880,39 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     std::thread* server_try_cancel_thd = NULL;
+
+    auto verif = Verifier(GetParam());
+
     if (server_try_cancel == CANCEL_DURING_PROCESSING) {
-      server_try_cancel_thd = new std::thread(
-          &AsyncEnd2endServerTryCancelTest::ServerTryCancel, this, &srv_ctx);
+      server_try_cancel_thd =
+          new std::thread(&ServerContext::TryCancel, &srv_ctx);
       // Server will cancel the RPC in a parallel thread while reading the
       // requests from the client. Since the cancellation can happen at anytime,
       // some of the cq results (i.e those until cancellation) might be true but
       // its non deterministic. So better to ignore the cq results
       ignore_cq_result = true;
+      // Expect that we might possibly see the done tag that
+      // indicates cancellation completion in this case
+      want_done_tag = true;
+      verif.Expect(11, true);
     }
 
     // Server reads 3 messages (tags 6, 7 and 8)
+    // But if want_done_tag is true, we might also see tag 11
     for (int tag_idx = 6; tag_idx <= 8; tag_idx++) {
       srv_stream.Read(&recv_request, tag(tag_idx));
-      Verifier(GetParam())
-          .Expect(tag_idx, expected_server_cq_result)
-          .Verify(cq_.get(), ignore_cq_result);
+      // Note that we'll add something to the verifier and verify that
+      // something was seen, but it might be tag 11 and not what we
+      // just added
+      int got_tag = verif.Expect(tag_idx, expected_server_cq_result)
+                        .Next(cq_.get(), ignore_cq_result);
+      GPR_ASSERT((got_tag == tag_idx) || (got_tag == 11 && want_done_tag));
+      if (got_tag == 11) {
+        EXPECT_TRUE(srv_ctx.IsCancelled());
+        want_done_tag = false;
+        // Now get the other entry that we were waiting on
+        EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), tag_idx);
+      }
     }
 
     if (server_try_cancel_thd != NULL) {
@@ -892,7 +921,15 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     if (server_try_cancel == CANCEL_AFTER_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      want_done_tag = true;
+      verif.Expect(11, true);
+    }
+
+    if (want_done_tag) {
+      verif.Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
     }
 
     // The RPC has been cancelled at this point for sure (i.e irrespective of
@@ -945,6 +982,7 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     Verifier(GetParam()).Expect(1, true).Verify(cq_.get());
     // On the server, request to be notified of 'ResponseStream' calls and
     // receive the call just made by the client
+    srv_ctx.AsyncNotifyWhenDone(tag(11));
     service_.RequestResponseStream(&srv_ctx, &recv_request, &srv_stream,
                                    cq_.get(), cq_.get(), tag(2));
     Verifier(GetParam()).Expect(2, true).Verify(cq_.get());
@@ -952,9 +990,12 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     bool expected_cq_result = true;
     bool ignore_cq_result = false;
+    bool want_done_tag = false;
 
     if (server_try_cancel == CANCEL_BEFORE_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      Verifier(GetParam()).Expect(11, true).Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
 
       // We know for sure that all cq results will be false from this point
       // since the server cancelled the RPC
@@ -962,24 +1003,41 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     std::thread* server_try_cancel_thd = NULL;
+
+    auto verif = Verifier(GetParam());
+
     if (server_try_cancel == CANCEL_DURING_PROCESSING) {
-      server_try_cancel_thd = new std::thread(
-          &AsyncEnd2endServerTryCancelTest::ServerTryCancel, this, &srv_ctx);
+      server_try_cancel_thd =
+          new std::thread(&ServerContext::TryCancel, &srv_ctx);
 
       // Server will cancel the RPC in a parallel thread while writing responses
       // to the client. Since the cancellation can happen at anytime, some of
       // the cq results (i.e those until cancellation) might be true but it is
       // non deterministic. So better to ignore the cq results
       ignore_cq_result = true;
+      // Expect that we might possibly see the done tag that
+      // indicates cancellation completion in this case
+      want_done_tag = true;
+      verif.Expect(11, true);
     }
 
     // Server sends three messages (tags 3, 4 and 5)
+    // But if want_done tag is true, we might also see tag 11
     for (int tag_idx = 3; tag_idx <= 5; tag_idx++) {
       send_response.set_message("Pong " + std::to_string(tag_idx));
       srv_stream.Write(send_response, tag(tag_idx));
-      Verifier(GetParam())
-          .Expect(tag_idx, expected_cq_result)
-          .Verify(cq_.get(), ignore_cq_result);
+      // Note that we'll add something to the verifier and verify that
+      // something was seen, but it might be tag 11 and not what we
+      // just added
+      int got_tag = verif.Expect(tag_idx, expected_cq_result)
+                        .Next(cq_.get(), ignore_cq_result);
+      GPR_ASSERT((got_tag == tag_idx) || (got_tag == 11 && want_done_tag));
+      if (got_tag == 11) {
+        EXPECT_TRUE(srv_ctx.IsCancelled());
+        want_done_tag = false;
+        // Now get the other entry that we were waiting on
+        EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), tag_idx);
+      }
     }
 
     if (server_try_cancel_thd != NULL) {
@@ -988,13 +1046,21 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     if (server_try_cancel == CANCEL_AFTER_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      want_done_tag = true;
+      verif.Expect(11, true);
 
       // Client reads may fail bacause it is notified that the stream is
       // cancelled.
       ignore_cq_result = true;
     }
 
+    if (want_done_tag) {
+      verif.Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+    }
+
     // Client attemts to read the three messages from the server
     for (int tag_idx = 6; tag_idx <= 8; tag_idx++) {
       cli_stream->Read(&recv_response, tag(tag_idx));
@@ -1052,6 +1118,7 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     // On the server, request to be notified of the 'BidiStream' call and
     // receive the call just made by the client
+    srv_ctx.AsyncNotifyWhenDone(tag(11));
     service_.RequestBidiStream(&srv_ctx, &srv_stream, cq_.get(), cq_.get(),
                                tag(2));
     Verifier(GetParam()).Expect(2, true).Verify(cq_.get());
@@ -1063,9 +1130,12 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
 
     bool expected_cq_result = true;
     bool ignore_cq_result = false;
+    bool want_done_tag = false;
 
     if (server_try_cancel == CANCEL_BEFORE_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      Verifier(GetParam()).Expect(11, true).Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
 
       // We know for sure that all cq results will be false from this point
       // since the server cancelled the RPC
@@ -1073,42 +1143,84 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     std::thread* server_try_cancel_thd = NULL;
+
+    auto verif = Verifier(GetParam());
+
     if (server_try_cancel == CANCEL_DURING_PROCESSING) {
-      server_try_cancel_thd = new std::thread(
-          &AsyncEnd2endServerTryCancelTest::ServerTryCancel, this, &srv_ctx);
+      server_try_cancel_thd =
+          new std::thread(&ServerContext::TryCancel, &srv_ctx);
 
       // Since server is going to cancel the RPC in a parallel thread, some of
       // the cq results (i.e those until the cancellation) might be true. Since
       // that number is non-deterministic, it is better to ignore the cq results
       ignore_cq_result = true;
+      // Expect that we might possibly see the done tag that
+      // indicates cancellation completion in this case
+      want_done_tag = true;
+      verif.Expect(11, true);
     }
 
+    int got_tag;
     srv_stream.Read(&recv_request, tag(4));
-    Verifier(GetParam())
-        .Expect(4, expected_cq_result)
-        .Verify(cq_.get(), ignore_cq_result);
+    verif.Expect(4, expected_cq_result);
+    got_tag = verif.Next(cq_.get(), ignore_cq_result);
+    GPR_ASSERT((got_tag == 4) || (got_tag == 11 && want_done_tag));
+    if (got_tag == 11) {
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+      // Now get the other entry that we were waiting on
+      EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), 4);
+    }
 
     send_response.set_message("Pong");
     srv_stream.Write(send_response, tag(5));
-    Verifier(GetParam())
-        .Expect(5, expected_cq_result)
-        .Verify(cq_.get(), ignore_cq_result);
+    verif.Expect(5, expected_cq_result);
+    got_tag = verif.Next(cq_.get(), ignore_cq_result);
+    GPR_ASSERT((got_tag == 5) || (got_tag == 11 && want_done_tag));
+    if (got_tag == 11) {
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+      // Now get the other entry that we were waiting on
+      EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), 5);
+    }
 
     cli_stream->Read(&recv_response, tag(6));
-    Verifier(GetParam())
-        .Expect(6, expected_cq_result)
-        .Verify(cq_.get(), ignore_cq_result);
+    verif.Expect(6, expected_cq_result);
+    got_tag = verif.Next(cq_.get(), ignore_cq_result);
+    GPR_ASSERT((got_tag == 6) || (got_tag == 11 && want_done_tag));
+    if (got_tag == 11) {
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+      // Now get the other entry that we were waiting on
+      EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), 6);
+    }
 
     // This is expected to succeed in all cases
     cli_stream->WritesDone(tag(7));
-    Verifier(GetParam()).Expect(7, true).Verify(cq_.get());
+    verif.Expect(7, true);
+    got_tag = verif.Next(cq_.get(), ignore_cq_result);
+    GPR_ASSERT((got_tag == 7) || (got_tag == 11 && want_done_tag));
+    if (got_tag == 11) {
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+      // Now get the other entry that we were waiting on
+      EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), 7);
+    }
 
     // This is expected to fail in all cases i.e for all values of
     // server_try_cancel. This is because at this point, either there are no
     // more msgs from the client (because client called WritesDone) or the RPC
     // is cancelled on the server
     srv_stream.Read(&recv_request, tag(8));
-    Verifier(GetParam()).Expect(8, false).Verify(cq_.get());
+    verif.Expect(8, false);
+    got_tag = verif.Next(cq_.get(), ignore_cq_result);
+    GPR_ASSERT((got_tag == 8) || (got_tag == 11 && want_done_tag));
+    if (got_tag == 11) {
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
+      // Now get the other entry that we were waiting on
+      EXPECT_EQ(verif.Next(cq_.get(), ignore_cq_result), 8);
+    }
 
     if (server_try_cancel_thd != NULL) {
       server_try_cancel_thd->join();
@@ -1116,7 +1228,15 @@ class AsyncEnd2endServerTryCancelTest : public AsyncEnd2endTest {
     }
 
     if (server_try_cancel == CANCEL_AFTER_PROCESSING) {
-      ServerTryCancel(&srv_ctx);
+      srv_ctx.TryCancel();
+      want_done_tag = true;
+      verif.Expect(11, true);
+    }
+
+    if (want_done_tag) {
+      verif.Verify(cq_.get());
+      EXPECT_TRUE(srv_ctx.IsCancelled());
+      want_done_tag = false;
     }
 
     // The RPC has been cancelled at this point for sure (i.e irrespective of

test/cpp/end2end/end2end_test.cc

@@ -59,6 +59,7 @@
 
 using grpc::testing::EchoRequest;
 using grpc::testing::EchoResponse;
+using grpc::testing::kTlsCredentialsType;
 using std::chrono::system_clock;
 
 namespace grpc {
@@ -1194,6 +1195,8 @@ TEST_P(SecureEnd2endTest, BlockingAuthMetadataPluginAndProcessorSuccess) {
   request.mutable_param()->set_echo_metadata(true);
   request.mutable_param()->set_expected_client_identity(
       TestAuthMetadataProcessor::kGoodGuy);
+  request.mutable_param()->set_expected_transport_security_type(
+      GetParam().credentials_type);
 
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_EQ(request.message(), response.message());
@@ -1301,6 +1304,8 @@ TEST_P(SecureEnd2endTest, NonBlockingAuthMetadataPluginAndProcessorSuccess) {
   request.mutable_param()->set_echo_metadata(true);
   request.mutable_param()->set_expected_client_identity(
       TestAuthMetadataProcessor::kGoodGuy);
+  request.mutable_param()->set_expected_transport_security_type(
+      GetParam().credentials_type);
 
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_EQ(request.message(), response.message());
@@ -1349,25 +1354,30 @@ TEST_P(SecureEnd2endTest, ClientAuthContext) {
   EchoRequest request;
   EchoResponse response;
   request.set_message("Hello");
-  request.mutable_param()->set_check_auth_context(true);
-
+  request.mutable_param()->set_check_auth_context(GetParam().credentials_type ==
+                                                  kTlsCredentialsType);
+  request.mutable_param()->set_expected_transport_security_type(
+      GetParam().credentials_type);
   ClientContext context;
   Status s = stub_->Echo(&context, request, &response);
   EXPECT_EQ(response.message(), request.message());
   EXPECT_TRUE(s.ok());
 
   std::shared_ptr<const AuthContext> auth_ctx = context.auth_context();
-  std::vector<grpc::string_ref> ssl =
+  std::vector<grpc::string_ref> tst =
       auth_ctx->FindPropertyValues("transport_security_type");
-  EXPECT_EQ(1u, ssl.size());
-  EXPECT_EQ("ssl", ToString(ssl[0]));
-  EXPECT_EQ("x509_subject_alternative_name",
-            auth_ctx->GetPeerIdentityPropertyName());
-  EXPECT_EQ(3u, auth_ctx->GetPeerIdentity().size());
-  EXPECT_EQ("*.test.google.fr", ToString(auth_ctx->GetPeerIdentity()[0]));
-  EXPECT_EQ("waterzooi.test.google.be",
-            ToString(auth_ctx->GetPeerIdentity()[1]));
-  EXPECT_EQ("*.test.youtube.com", ToString(auth_ctx->GetPeerIdentity()[2]));
+  EXPECT_EQ(1u, tst.size());
+  EXPECT_EQ(GetParam().credentials_type, ToString(tst[0]));
+  if (GetParam().credentials_type == kTlsCredentialsType) {
+    EXPECT_EQ("x509_subject_alternative_name",
+              auth_ctx->GetPeerIdentityPropertyName());
+    EXPECT_EQ(4u, auth_ctx->GetPeerIdentity().size());
+    EXPECT_EQ("*.test.google.fr", ToString(auth_ctx->GetPeerIdentity()[0]));
+    EXPECT_EQ("waterzooi.test.google.be",
+              ToString(auth_ctx->GetPeerIdentity()[1]));
+    EXPECT_EQ("*.test.youtube.com", ToString(auth_ctx->GetPeerIdentity()[2]));
+    EXPECT_EQ("192.168.1.3", ToString(auth_ctx->GetPeerIdentity()[3]));
+  }
 }
 
 std::vector<TestScenario> CreateTestScenarios(bool use_proxy,

test/cpp/end2end/test_service_impl.cc

@@ -62,14 +62,16 @@ void MaybeEchoDeadline(ServerContext* context, const EchoRequest* request,
   }
 }
 
-void CheckServerAuthContext(const ServerContext* context,
-                            const grpc::string& expected_client_identity) {
+void CheckServerAuthContext(
+    const ServerContext* context,
+    const grpc::string& expected_transport_security_type,
+    const grpc::string& expected_client_identity) {
   std::shared_ptr<const AuthContext> auth_ctx = context->auth_context();
-  std::vector<grpc::string_ref> ssl =
+  std::vector<grpc::string_ref> tst =
       auth_ctx->FindPropertyValues("transport_security_type");
-  EXPECT_EQ(1u, ssl.size());
-  EXPECT_EQ("ssl", ToString(ssl[0]));
-  if (expected_client_identity.length() == 0) {
+  EXPECT_EQ(1u, tst.size());
+  EXPECT_EQ(expected_transport_security_type, ToString(tst[0]));
+  if (expected_client_identity.empty()) {
     EXPECT_TRUE(auth_ctx->GetPeerIdentityPropertyName().empty());
     EXPECT_TRUE(auth_ctx->GetPeerIdentity().empty());
     EXPECT_FALSE(auth_ctx->IsPeerAuthenticated());
@@ -139,6 +141,7 @@ Status TestServiceImpl::Echo(ServerContext* context, const EchoRequest* request,
       (request->param().expected_client_identity().length() > 0 ||
        request->param().check_auth_context())) {
     CheckServerAuthContext(context,
+                           request->param().expected_transport_security_type(),
                            request->param().expected_client_identity());
   }
   if (request->has_param() && request->param().response_message_length() > 0) {

test/cpp/qps/client.h

@@ -123,15 +123,13 @@ class Client {
     if (reset) {
       Histogram* to_merge = new Histogram[threads_.size()];
       for (size_t i = 0; i < threads_.size(); i++) {
-        threads_[i]->BeginSwap(&to_merge[i]);
-      }
-      std::unique_ptr<UsageTimer> timer(new UsageTimer);
-      timer_.swap(timer);
-      for (size_t i = 0; i < threads_.size(); i++) {
-        threads_[i]->EndSwap();
+        threads_[i]->Swap(&to_merge[i]);
         latencies.Merge(to_merge[i]);
       }
       delete[] to_merge;
+
+      std::unique_ptr<UsageTimer> timer(new UsageTimer);
+      timer_.swap(timer);
       timer_result = timer->Mark();
     } else {
       // merge snapshots of each thread histogram
@@ -227,7 +225,6 @@ class Client {
    public:
     Thread(Client* client, size_t idx)
         : done_(false),
-          new_stats_(nullptr),
           client_(client),
           idx_(idx),
           impl_(&Thread::ThreadFunc, this) {}
@@ -240,16 +237,9 @@ class Client {
       impl_.join();
     }
 
-    void BeginSwap(Histogram* n) {
+    void Swap(Histogram* n) {
       std::lock_guard<std::mutex> g(mu_);
-      new_stats_ = n;
-    }
-
-    void EndSwap() {
-      std::unique_lock<std::mutex> g(mu_);
-      while (new_stats_ != nullptr) {
-        cv_.wait(g);
-      };
+      n->Swap(&histogram_);
     }
 
     void MergeStatsInto(Histogram* hist) {
@@ -263,10 +253,11 @@ class Client {
 
     void ThreadFunc() {
       for (;;) {
+        // lock since the thread should only be doing one thing at a time
+        std::lock_guard<std::mutex> g(mu_);
         // run the loop body
         const bool thread_still_ok = client_->ThreadFunc(&histogram_, idx_);
-        // lock, see if we're done
-        std::lock_guard<std::mutex> g(mu_);
+        // see if we're done
         if (!thread_still_ok) {
           gpr_log(GPR_ERROR, "Finishing client thread due to RPC error");
           done_ = true;
@@ -274,19 +265,11 @@ class Client {
         if (done_) {
           return;
         }
-        // check if we're resetting stats, swap out the histogram if so
-        if (new_stats_) {
-          new_stats_->Swap(&histogram_);
-          new_stats_ = nullptr;
-          cv_.notify_one();
-        }
       }
     }
 
     std::mutex mu_;
-    std::condition_variable cv_;
     bool done_;
-    Histogram* new_stats_;
     Histogram histogram_;
     Client* client_;
     const size_t idx_;

test/cpp/qps/driver.cc

@@ -348,19 +348,10 @@ std::unique_ptr<ScenarioResult> RunScenario(
   std::unique_ptr<ScenarioResult> result(new ScenarioResult);
   result->client_config = result_client_config;
   result->server_config = result_server_config;
-  gpr_log(GPR_INFO, "Finishing");
-  for (auto server = &servers[0]; server != &servers[num_servers]; server++) {
-    GPR_ASSERT(server->stream->Write(server_mark));
-  }
+  gpr_log(GPR_INFO, "Finishing clients");
   for (auto client = &clients[0]; client != &clients[num_clients]; client++) {
     GPR_ASSERT(client->stream->Write(client_mark));
-  }
-  for (auto server = &servers[0]; server != &servers[num_servers]; server++) {
-    GPR_ASSERT(server->stream->Read(&server_status));
-    const auto& stats = server_status.stats();
-    result->server_resources.emplace_back(
-        stats.time_elapsed(), stats.time_user(), stats.time_system(),
-        server_status.cores());
+    GPR_ASSERT(client->stream->WritesDone());
   }
   for (auto client = &clients[0]; client != &clients[num_clients]; client++) {
     GPR_ASSERT(client->stream->Read(&client_status));
@@ -368,17 +359,30 @@ std::unique_ptr<ScenarioResult> RunScenario(
     result->latencies.MergeProto(stats.latencies());
     result->client_resources.emplace_back(
         stats.time_elapsed(), stats.time_user(), stats.time_system(), -1);
+    GPR_ASSERT(!client->stream->Read(&client_status));
   }
-
   for (auto client = &clients[0]; client != &clients[num_clients]; client++) {
-    GPR_ASSERT(client->stream->WritesDone());
     GPR_ASSERT(client->stream->Finish().ok());
   }
+  delete[] clients;
+
+  gpr_log(GPR_INFO, "Finishing servers");
   for (auto server = &servers[0]; server != &servers[num_servers]; server++) {
+    GPR_ASSERT(server->stream->Write(server_mark));
     GPR_ASSERT(server->stream->WritesDone());
+  }
+  for (auto server = &servers[0]; server != &servers[num_servers]; server++) {
+    GPR_ASSERT(server->stream->Read(&server_status));
+    const auto& stats = server_status.stats();
+    result->server_resources.emplace_back(
+        stats.time_elapsed(), stats.time_user(), stats.time_system(),
+        server_status.cores());
+    GPR_ASSERT(!server->stream->Read(&server_status));
+  }
+  for (auto server = &servers[0]; server != &servers[num_servers]; server++) {
     GPR_ASSERT(server->stream->Finish().ok());
   }
-  delete[] clients;
+
   delete[] servers;
   return result;
 }

test/cpp/util/test_credentials_provider.h

@@ -44,7 +44,10 @@ namespace grpc {
 namespace testing {
 
 const char kInsecureCredentialsType[] = "INSECURE_CREDENTIALS";
-const char kTlsCredentialsType[] = "TLS_CREDENTIALS";
+
+// For real credentials, like tls/ssl, this name should match the AuthContext
+// property "transport_security_type".
+const char kTlsCredentialsType[] = "ssl";
 
 // Provide test credentials of a particular type.
 class CredentialTypeProvider {

tools/dockerfile/test/cxx_ubuntu1404_x64/Dockerfile

@@ -0,0 +1,86 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM ubuntu:14.04
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  golang \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+#================
+# Build profiling
+RUN apt-get update && apt-get install -y time && apt-get clean
+
+#=================
+# C++ dependencies
+RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
+
+# Prepare ccache
+RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
+RUN ln -s /usr/bin/ccache /usr/local/bin/g++
+RUN ln -s /usr/bin/ccache /usr/local/bin/cc
+RUN ln -s /usr/bin/ccache /usr/local/bin/c++
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
+
+#======================
+# Zookeeper dependencies
+# TODO(jtattermusch): is zookeeper still needed?
+RUN apt-get install -y libzookeeper-mt-dev
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]

tools/dockerfile/test/multilang_jessie_x64/Dockerfile

@@ -0,0 +1,155 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+FROM debian:jessie
+
+# Install Git and basic packages.
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  gcc-multilib \
+  git \
+  golang \
+  gyp \
+  lcov \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  perl \
+  strace \
+  python-dev \
+  python-setuptools \
+  python-yaml \
+  telnet \
+  unzip \
+  wget \
+  zip && apt-get clean
+
+#================
+# Build profiling
+RUN apt-get update && apt-get install -y time && apt-get clean
+
+#================
+# C# dependencies
+
+# Update to a newer version of mono
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy-libtiff-compat main" | tee -a /etc/apt/sources.list.d/mono-xamarin.list
+
+# Install dependencies
+RUN apt-get update && apt-get -y dist-upgrade && apt-get install -y \
+    mono-devel \
+    ca-certificates-mono \
+    nuget \
+    && apt-get clean
+
+#=================
+# C++ dependencies
+RUN apt-get update && apt-get -y install libgflags-dev libgtest-dev libc++-dev clang && apt-get clean
+
+#==================
+# Node dependencies
+
+# Install nvm
+RUN touch .profile
+RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.25.4/install.sh | bash
+RUN /bin/bash -l -c "nvm install 0.12 && npm config set cache /tmp/npm-cache"
+
+#=================
+# PHP dependencies
+
+# Install dependencies
+
+RUN /bin/bash -l -c "echo 'deb http://packages.dotdeb.org wheezy-php55 all' \
+    >> /etc/apt/sources.list.d/dotdeb.list"
+RUN /bin/bash -l -c "echo 'deb-src http://packages.dotdeb.org wheezy-php55 all' \
+    >> /etc/apt/sources.list.d/dotdeb.list"
+RUN wget http://www.dotdeb.org/dotdeb.gpg -O- | apt-key add -
+
+RUN apt-get update && apt-get install -y \
+    git php5 php5-dev phpunit unzip
+
+#==================
+# Ruby dependencies
+
+# Install rvm
+RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+RUN \curl -sSL https://get.rvm.io | bash -s stable
+
+# Install Ruby 2.1
+RUN /bin/bash -l -c "rvm install ruby-2.1"
+RUN /bin/bash -l -c "rvm use --default ruby-2.1"
+RUN /bin/bash -l -c "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
+RUN /bin/bash -l -c "echo 'export PATH=/usr/local/rvm/bin:$PATH' >> ~/.bashrc"
+RUN /bin/bash -l -c "echo 'rvm --default use ruby-2.1' >> ~/.bashrc"
+RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc"
+
+#====================
+# Python dependencies
+
+# Install dependencies
+
+RUN apt-get update && apt-get install -y \
+    python-all-dev \
+    python3-all-dev \
+    python-pip
+
+# Install Python packages from PyPI
+RUN pip install pip --upgrade
+RUN pip install virtualenv
+RUN pip install futures==2.2.0 enum34==1.0.4 protobuf==3.0.0a2 tox
+
+# Prepare ccache
+RUN ln -s /usr/bin/ccache /usr/local/bin/gcc
+RUN ln -s /usr/bin/ccache /usr/local/bin/g++
+RUN ln -s /usr/bin/ccache /usr/local/bin/cc
+RUN ln -s /usr/bin/ccache /usr/local/bin/c++
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang
+RUN ln -s /usr/bin/ccache /usr/local/bin/clang++
+
+#======================
+# Zookeeper dependencies
+# TODO(jtattermusch): is zookeeper still needed?
+RUN apt-get install -y libzookeeper-mt-dev
+
+RUN mkdir /var/local/jenkins
+
+# Define the default command.
+CMD ["bash"]

tools/gce/create_linux_worker.sh

@@ -37,7 +37,7 @@ cd $(dirname $0)
 CLOUD_PROJECT=grpc-testing
 ZONE=us-central1-a
 
-INSTANCE_NAME=grpc-jenkins-worker1
+INSTANCE_NAME="${1:-grpc-jenkins-worker1}"
 
 gcloud compute instances create $INSTANCE_NAME \
     --project="$CLOUD_PROJECT" \

tools/jenkins/run_full_interop.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# This script is invoked by Jenkins and runs interop test suite.
+set -ex
+
+# Enter the gRPC repo root
+cd $(dirname $0)/../..
+
+tools/run_tests/run_interop_tests.py -l all -s all --cloud_to_prod --cloud_to_prod_auth --prod_servers default cloud_gateway gateway_v2 cloud_gateway_v2 gateway_v4 cloud_gateway_v4 --use_docker --http2_interop -t -j 12 $@ || true

tools/run_tests/run_interop_tests.py

@@ -589,7 +589,11 @@ prod_servers = {
     'cloud_gateway': ('216.239.32.255', 'grpc-test.sandbox.googleapis.com',
                       False),
     'cloud_gateway_v2': ('216.239.32.255', 'grpc-test2.sandbox.googleapis.com',
-                         True)
+                         True),
+    'gateway_v4': ('grpc-test4.sandbox.googleapis.com', 
+                   'grpc-test4.sandbox.googleapis.com', True), 
+    'cloud_gateway_v4': ('216.239.32.255', 'grpc-test4.sandbox.googleapis.com',
+                         True),
 }
 
 argp = argparse.ArgumentParser(description='Run interop tests.')

tools/run_tests/run_tests.py

@@ -142,9 +142,8 @@ class CLanguage(object):
       self._make_options = [_windows_toolset_option(self.args.compiler),
                             _windows_arch_option(self.args.arch)]
     else:
-      self._make_options = []
-      self._docker_distro = self._get_docker_distro(self.args.use_docker,
-                                                    self.args.compiler)
+      self._docker_distro, self._make_options = self._compiler_options(self.args.use_docker,
+                                                                       self.args.compiler)
 
   def test_specs(self):
     out = []
@@ -229,18 +228,26 @@ class CLanguage(object):
   def makefile_name(self):
     return 'Makefile'
 
-  def _get_docker_distro(self, use_docker, compiler):
+  def _clang_make_options(self):
+    return ['CC=clang', 'CXX=clang++', 'LD=clang', 'LDXX=clang++']
+
+  def _compiler_options(self, use_docker, compiler):
+    """Returns docker distro and make options to use for given compiler."""
     if _is_use_docker_child():
-      return "already_under_docker"
+      return ("already_under_docker", [])
     if not use_docker:
       _check_compiler(compiler, ['default'])
 
     if compiler == 'gcc4.9' or compiler == 'default':
-      return 'jessie'
+      return ('jessie', [])
     elif compiler == 'gcc4.4':
-      return 'squeeze'
+      return ('squeeze', [])
     elif compiler == 'gcc5.3':
-      return 'ubuntu1604'
+      return ('ubuntu1604', [])
+    elif compiler == 'clang3.4':
+      return ('ubuntu1404', self._clang_make_options())
+    elif compiler == 'clang3.6':
+      return ('ubuntu1604', self._clang_make_options())
     else:
       raise Exception('Compiler %s not supported.' % compiler)
 
@@ -774,6 +781,7 @@ argp.add_argument('--arch',
 argp.add_argument('--compiler',
                   choices=['default',
                            'gcc4.4', 'gcc4.9', 'gcc5.3',
+                           'clang3.4', 'clang3.6',
                            'vs2010', 'vs2013', 'vs2015'],
                   default='default',
                   help='Selects compiler to use. Allowed values depend on the platform and language.')
@@ -861,10 +869,17 @@ if args.use_docker:
 
   dockerfile_dirs = set([l.dockerfile_dir() for l in languages])
   if len(dockerfile_dirs) > 1:
-    print 'Languages to be tested require running under different docker images.'
-    sys.exit(1)
-  dockerfile_dir = next(iter(dockerfile_dirs))
-
+    if 'gcov' in args.config:
+      dockerfile_dir = 'tools/dockerfile/test/multilang_jessie_x64'
+      print ('Using multilang_jessie_x64 docker image for code coverage for '
+             'all languages.')
+    else:
+      print ('Languages to be tested require running under different docker '
+             'images.')
+      sys.exit(1)
+  else:
+    dockerfile_dir = next(iter(dockerfile_dirs))
+    
   child_argv = [ arg for arg in sys.argv if not arg == '--use_docker' ]
   run_tests_cmd = 'python tools/run_tests/run_tests.py %s' % ' '.join(child_argv[1:])
 

tools/run_tests/sanity/sanity_tests.yaml

@@ -2,7 +2,6 @@
 - script: tools/run_tests/sanity/check_cache_mk.sh
 - script: tools/run_tests/sanity/check_sources_and_headers.py
 - script: tools/run_tests/sanity/check_submodules.sh
-- script: tools/run_tests/sanity/check_version.py
 - script: tools/buildgen/generate_projects.sh -j 3
   cpu_cost: 3
 - script: tools/distrib/check_copyright.py

tools/run_tests/sources_and_headers.json

@@ -189,6 +189,38 @@
     "third_party": false, 
     "type": "target"
   }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "concurrent_connectivity_test", 
+    "src": [
+      "test/core/surface/concurrent_connectivity_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
+  {
+    "deps": [
+      "gpr", 
+      "gpr_test_util", 
+      "grpc", 
+      "grpc_test_util"
+    ], 
+    "headers": [], 
+    "language": "c", 
+    "name": "dns_resolver_connectivity_test", 
+    "src": [
+      "test/core/client_config/resolvers/dns_resolver_connectivity_test.c"
+    ], 
+    "third_party": false, 
+    "type": "target"
+  }, 
   {
     "deps": [
       "gpr", 

tools/run_tests/tests.json

@@ -253,6 +253,48 @@
       "windows"
     ]
   }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 1.0, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "concurrent_connectivity_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
+  {
+    "args": [], 
+    "ci_platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ], 
+    "cpu_cost": 0.1, 
+    "exclude_configs": [], 
+    "flaky": false, 
+    "gtest": false, 
+    "language": "c", 
+    "name": "dns_resolver_connectivity_test", 
+    "platforms": [
+      "linux", 
+      "mac", 
+      "posix", 
+      "windows"
+    ]
+  }, 
   {
     "args": [], 
     "ci_platforms": [

vsprojects/buildtests_c.sln

@@ -251,6 +251,28 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "compression_test", "vcxproj
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "concurrent_connectivity_test", "vcxproj\test\concurrent_connectivity_test\concurrent_connectivity_test.vcxproj", "{391B366C-D916-45AA-3FE5-67363A46193B}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "dns_resolver_connectivity_test", "vcxproj\test\dns_resolver_connectivity_test\dns_resolver_connectivity_test.vcxproj", "{F7B6FE68-E847-D7CA-4062-E737E542BCC3}"
+	ProjectSection(myProperties) = preProject
+        	lib = "False"
+	EndProjectSection
+	ProjectSection(ProjectDependencies) = postProject
+		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
+		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
+		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
+		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
+	EndProjectSection
+EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "dns_resolver_test", "vcxproj\test\dns_resolver_test\dns_resolver_test.vcxproj", "{D06E10DC-272A-5203-7066-2698A247DF26}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -1745,6 +1767,38 @@ Global
 		{5AFE7D17-A4A7-D68E-4491-CBC852F9D2A0}.Release-DLL|Win32.Build.0 = Release|Win32
 		{5AFE7D17-A4A7-D68E-4491-CBC852F9D2A0}.Release-DLL|x64.ActiveCfg = Release|x64
 		{5AFE7D17-A4A7-D68E-4491-CBC852F9D2A0}.Release-DLL|x64.Build.0 = Release|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug|x64.ActiveCfg = Debug|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release|Win32.ActiveCfg = Release|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release|x64.ActiveCfg = Release|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug|Win32.Build.0 = Debug|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug|x64.Build.0 = Debug|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release|Win32.Build.0 = Release|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release|x64.Build.0 = Release|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Debug-DLL|x64.Build.0 = Debug|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release-DLL|Win32.Build.0 = Release|Win32
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release-DLL|x64.ActiveCfg = Release|x64
+		{391B366C-D916-45AA-3FE5-67363A46193B}.Release-DLL|x64.Build.0 = Release|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug|Win32.ActiveCfg = Debug|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug|x64.ActiveCfg = Debug|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release|Win32.ActiveCfg = Release|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release|x64.ActiveCfg = Release|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug|Win32.Build.0 = Debug|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug|x64.Build.0 = Debug|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release|Win32.Build.0 = Release|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release|x64.Build.0 = Release|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug-DLL|Win32.Build.0 = Debug|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug-DLL|x64.ActiveCfg = Debug|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Debug-DLL|x64.Build.0 = Debug|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release-DLL|Win32.ActiveCfg = Release|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release-DLL|Win32.Build.0 = Release|Win32
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release-DLL|x64.ActiveCfg = Release|x64
+		{F7B6FE68-E847-D7CA-4062-E737E542BCC3}.Release-DLL|x64.Build.0 = Release|x64
 		{D06E10DC-272A-5203-7066-2698A247DF26}.Debug|Win32.ActiveCfg = Debug|Win32
 		{D06E10DC-272A-5203-7066-2698A247DF26}.Debug|x64.ActiveCfg = Debug|x64
 		{D06E10DC-272A-5203-7066-2698A247DF26}.Release|Win32.ActiveCfg = Release|Win32

vsprojects/vcxproj/test/concurrent_connectivity_test/concurrent_connectivity_test.vcxproj

@@ -0,0 +1,199 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('$(SolutionDir)\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{391B366C-D916-45AA-3FE5-67363A46193B}</ProjectGuid>
+    <IgnoreWarnIntDirInTempDetected>true</IgnoreWarnIntDirInTempDetected>
+    <IntDir>$(SolutionDir)IntDir\$(MSBuildProjectName)\</IntDir>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
+    <PlatformToolset>v100</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
+    <PlatformToolset>v110</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(VisualStudioVersion)' == '14.0'" Label="Configuration">
+    <PlatformToolset>v140</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(SolutionDir)\..\vsprojects\global.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\openssl.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\winsock.props" />
+    <Import Project="$(SolutionDir)\..\vsprojects\zlib.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'">
+    <TargetName>concurrent_connectivity_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Debug</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Debug</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TargetName>concurrent_connectivity_test</TargetName>
+    <Linkage-grpc_dependencies_zlib>static</Linkage-grpc_dependencies_zlib>
+    <Configuration-grpc_dependencies_zlib>Release</Configuration-grpc_dependencies_zlib>
+    <Linkage-grpc_dependencies_openssl>static</Linkage-grpc_dependencies_openssl>
+    <Configuration-grpc_dependencies_openssl>Release</Configuration-grpc_dependencies_openssl>
+  </PropertyGroup>
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <DebugInformationFormat Condition="$(Jenkins)">None</DebugInformationFormat>
+      <MinimalRebuild Condition="$(Jenkins)">false</MinimalRebuild>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation Condition="!$(Jenkins)">true</GenerateDebugInformation>
+      <GenerateDebugInformation Condition="$(Jenkins)">false</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+
+    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
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