test/core/iomgr/tcp_server_posix_test.c - platform/external/grpc-grpc - Gitiles

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

 #include "src/core/lib/iomgr/port.h"

 // This test won't work except with posix sockets enabled
 #ifdef GRPC_POSIX_SOCKET

 #include "src/core/lib/iomgr/tcp_server.h"

 #include <errno.h>
 #include <netinet/in.h>
 #include <string.h>
 #include <sys/socket.h>
 #include <unistd.h>

 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>

 #include "src/core/lib/iomgr/iomgr.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"

 #define LOG_TEST(x) gpr_log(GPR_INFO, "%s", #x)

 static gpr_mu *g_mu;
 static grpc_pollset *g_pollset;
 static int g_nconnects = 0;

 typedef struct on_connect_result {
   /* Owns a ref to server. */
   grpc_tcp_server *server;
   unsigned port_index;
   unsigned fd_index;
   int server_fd;
 } on_connect_result;

 typedef struct server_weak_ref {
   grpc_tcp_server *server;

   /* arg is this server_weak_ref. */
   grpc_closure server_shutdown;
 } server_weak_ref;

 static on_connect_result g_result = {NULL, 0, 0, -1};

 static void on_connect_result_init(on_connect_result *result) {
   result->server = NULL;
   result->port_index = 0;
   result->fd_index = 0;
   result->server_fd = -1;
 }

 static void on_connect_result_set(on_connect_result *result,
                                   const grpc_tcp_server_acceptor *acceptor) {
   result->server = grpc_tcp_server_ref(acceptor->from_server);
   result->port_index = acceptor->port_index;
   result->fd_index = acceptor->fd_index;
   result->server_fd = grpc_tcp_server_port_fd(
       result->server, acceptor->port_index, acceptor->fd_index);
 }

 static void server_weak_ref_shutdown(grpc_exec_ctx *exec_ctx, void *arg,
                                      grpc_error *error) {
   server_weak_ref *weak_ref = arg;
   weak_ref->server = NULL;
 }

 static void server_weak_ref_init(server_weak_ref *weak_ref) {
   weak_ref->server = NULL;
   grpc_closure_init(&weak_ref->server_shutdown, server_weak_ref_shutdown,
                     weak_ref);
 }

 /* Make weak_ref->server_shutdown a shutdown_starting cb on server.
    grpc_tcp_server promises that the server object will live until
    weak_ref->server_shutdown has returned. A strong ref on grpc_tcp_server
    should be held until server_weak_ref_set() returns to avoid a race where the
    server is deleted before the shutdown_starting cb is added. */
 static void server_weak_ref_set(server_weak_ref *weak_ref,
                                 grpc_tcp_server *server) {
   grpc_tcp_server_shutdown_starting_add(server, &weak_ref->server_shutdown);
   weak_ref->server = server;
 }

 static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp,
                        grpc_pollset *pollset,
                        grpc_tcp_server_acceptor *acceptor) {
   grpc_endpoint_shutdown(exec_ctx, tcp);
   grpc_endpoint_destroy(exec_ctx, tcp);

   on_connect_result temp_result;
   on_connect_result_set(&temp_result, acceptor);

   gpr_mu_lock(g_mu);
   g_result = temp_result;
   g_nconnects++;
   GPR_ASSERT(
       GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
   gpr_mu_unlock(g_mu);
 }

 static void test_no_op(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);
 }

 static void test_no_op_with_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
   LOG_TEST("test_no_op_with_start");
   grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);
 }

 static void test_no_op_with_port(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port");

   memset(&resolved_addr, 0, sizeof(resolved_addr));
   resolved_addr.len = sizeof(struct sockaddr_in);
   addr->sin_family = AF_INET;
   int port;
   GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
                  GRPC_ERROR_NONE &&
              port > 0);

   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);
 }

 static void test_no_op_with_port_and_start(void) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_resolved_address resolved_addr;
   struct sockaddr_in *addr = (struct sockaddr_in *)resolved_addr.addr;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
   LOG_TEST("test_no_op_with_port_and_start");
   int port;

   memset(&resolved_addr, 0, sizeof(resolved_addr));
   resolved_addr.len = sizeof(struct sockaddr_in);
   addr->sin_family = AF_INET;
   GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
                  GRPC_ERROR_NONE &&
              port > 0);

   grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);

   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);
 }

 static void tcp_connect(grpc_exec_ctx *exec_ctx, const struct sockaddr *remote,
                         socklen_t remote_len, on_connect_result *result) {
   gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
   int clifd = socket(remote->sa_family, SOCK_STREAM, 0);
   int nconnects_before;

   gpr_mu_lock(g_mu);
   nconnects_before = g_nconnects;
   on_connect_result_init(&g_result);
   GPR_ASSERT(clifd >= 0);
   gpr_log(GPR_DEBUG, "start connect");
   GPR_ASSERT(connect(clifd, remote, remote_len) == 0);
   gpr_log(GPR_DEBUG, "wait");
   while (g_nconnects == nconnects_before &&
          gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) > 0) {
     grpc_pollset_worker *worker = NULL;
     GPR_ASSERT(GRPC_LOG_IF_ERROR(
         "pollset_work",
         grpc_pollset_work(exec_ctx, g_pollset, &worker,
                           gpr_now(GPR_CLOCK_MONOTONIC), deadline)));
     gpr_mu_unlock(g_mu);
     grpc_exec_ctx_finish(exec_ctx);
     gpr_mu_lock(g_mu);
   }
   gpr_log(GPR_DEBUG, "wait done");
   GPR_ASSERT(g_nconnects == nconnects_before + 1);
   close(clifd);
   *result = g_result;

   gpr_mu_unlock(g_mu);
 }

 /* Tests a tcp server with multiple ports. TODO(daniel-j-born): Multiple fds for
    the same port should be tested. */
 static void test_connect(unsigned n) {
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_resolved_address resolved_addr;
   grpc_resolved_address resolved_addr1;
   struct sockaddr_storage *addr = (struct sockaddr_storage *)resolved_addr.addr;
   struct sockaddr_storage *addr1 =
       (struct sockaddr_storage *)resolved_addr1.addr;
   unsigned svr_fd_count;
   int svr_port;
   unsigned svr1_fd_count;
   int svr1_port;
   grpc_tcp_server *s;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
   unsigned i;
   server_weak_ref weak_ref;
   server_weak_ref_init(&weak_ref);
   LOG_TEST("test_connect");
   gpr_log(GPR_INFO, "clients=%d", n);
   memset(&resolved_addr, 0, sizeof(resolved_addr));
   memset(&resolved_addr1, 0, sizeof(resolved_addr1));
   resolved_addr.len = sizeof(struct sockaddr_storage);
   resolved_addr1.len = sizeof(struct sockaddr_storage);
   addr->ss_family = addr1->ss_family = AF_INET;
   GPR_ASSERT(GRPC_ERROR_NONE ==
              grpc_tcp_server_add_port(s, &resolved_addr, &svr_port));
   GPR_ASSERT(svr_port > 0);
   /* Cannot use wildcard (port==0), because add_port() will try to reuse the
      same port as a previous add_port(). */
   svr1_port = grpc_pick_unused_port_or_die();
   grpc_sockaddr_set_port(&resolved_addr1, svr1_port);
   GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr1, &svr_port) ==
                  GRPC_ERROR_NONE &&
              svr_port == svr1_port);

   /* Bad port_index. */
   GPR_ASSERT(grpc_tcp_server_port_fd_count(s, 2) == 0);
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 2, 0) < 0);

   /* Bad fd_index. */
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 100) < 0);
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 1, 100) < 0);

   /* Got at least one fd per port. */
   svr_fd_count = grpc_tcp_server_port_fd_count(s, 0);
   GPR_ASSERT(svr_fd_count >= 1);
   svr1_fd_count = grpc_tcp_server_port_fd_count(s, 1);
   GPR_ASSERT(svr1_fd_count >= 1);

   for (i = 0; i < svr_fd_count; ++i) {
     int fd = grpc_tcp_server_port_fd(s, 0, i);
     GPR_ASSERT(fd >= 0);
     if (i == 0) {
       GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr,
                              (socklen_t *)&resolved_addr.len) == 0);
       GPR_ASSERT(resolved_addr.len <= sizeof(*addr));
     }
   }
   for (i = 0; i < svr1_fd_count; ++i) {
     int fd = grpc_tcp_server_port_fd(s, 1, i);
     GPR_ASSERT(fd >= 0);
     if (i == 0) {
       GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr1,
                              (socklen_t *)&resolved_addr1.len) == 0);
       GPR_ASSERT(resolved_addr1.len <= sizeof(*addr1));
     }
   }

   grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, NULL);

   for (i = 0; i < n; i++) {
     on_connect_result result;
     int svr_fd;
     on_connect_result_init(&result);
     tcp_connect(&exec_ctx, (struct sockaddr *)addr,
                 (socklen_t)resolved_addr.len, &result);
     GPR_ASSERT(result.server_fd >= 0);
     svr_fd = result.server_fd;
     GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
                result.server_fd);
     GPR_ASSERT(result.port_index == 0);
     GPR_ASSERT(result.fd_index < svr_fd_count);
     GPR_ASSERT(result.server == s);
     if (weak_ref.server == NULL) {
       server_weak_ref_set(&weak_ref, result.server);
     }
     grpc_tcp_server_unref(&exec_ctx, result.server);

     on_connect_result_init(&result);
     tcp_connect(&exec_ctx, (struct sockaddr *)addr1,
                 (socklen_t)resolved_addr1.len, &result);
     GPR_ASSERT(result.server_fd >= 0);
     GPR_ASSERT(result.server_fd != svr_fd);
     GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
                result.server_fd);
     GPR_ASSERT(result.port_index == 1);
     GPR_ASSERT(result.fd_index < svr_fd_count);
     GPR_ASSERT(result.server == s);
     grpc_tcp_server_unref(&exec_ctx, result.server);
   }

   /* Weak ref to server valid until final unref. */
   GPR_ASSERT(weak_ref.server != NULL);
   GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 0) >= 0);

   grpc_tcp_server_unref(&exec_ctx, s);
   grpc_exec_ctx_finish(&exec_ctx);

   /* Weak ref lost. */
   GPR_ASSERT(weak_ref.server == NULL);
 }

 static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p,
                             grpc_error *error) {
   grpc_pollset_destroy(p);
 }

 int main(int argc, char **argv) {
   grpc_closure destroyed;
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   grpc_test_init(argc, argv);
   grpc_init();
   g_pollset = gpr_malloc(grpc_pollset_size());
   grpc_pollset_init(g_pollset, &g_mu);

   test_no_op();
   test_no_op_with_start();
   test_no_op_with_port();
   test_no_op_with_port_and_start();
   test_connect(1);
   test_connect(10);

   grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
   grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
   grpc_exec_ctx_finish(&exec_ctx);
   grpc_shutdown();
   gpr_free(g_pollset);
   return 0;
 }

 #else /* GRPC_POSIX_SOCKET */

 int main(int argc, char **argv) { return 1; }

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

	#include "src/core/lib/iomgr/port.h"

	// This test won't work except with posix sockets enabled
	#ifdef GRPC_POSIX_SOCKET

	#include "src/core/lib/iomgr/tcp_server.h"

	#include <errno.h>
	#include <netinet/in.h>
	#include <string.h>
	#include <sys/socket.h>
	#include <unistd.h>

	#include <grpc/grpc.h>
	#include <grpc/support/alloc.h>
	#include <grpc/support/log.h>
	#include <grpc/support/sync.h>
	#include <grpc/support/time.h>

	#include "src/core/lib/iomgr/iomgr.h"
	#include "src/core/lib/iomgr/resolve_address.h"
	#include "src/core/lib/iomgr/sockaddr_utils.h"
	#include "test/core/util/port.h"
	#include "test/core/util/test_config.h"

	#define LOG_TEST(x) gpr_log(GPR_INFO, "%s", #x)

	static gpr_mu *g_mu;
	static grpc_pollset *g_pollset;
	static int g_nconnects = 0;

	typedef struct on_connect_result {
	/* Owns a ref to server. */
	grpc_tcp_server *server;
	unsigned port_index;
	unsigned fd_index;
	int server_fd;
	} on_connect_result;

	typedef struct server_weak_ref {
	grpc_tcp_server *server;

	/* arg is this server_weak_ref. */
	grpc_closure server_shutdown;
	} server_weak_ref;

	static on_connect_result g_result = {NULL, 0, 0, -1};

	static void on_connect_result_init(on_connect_result *result) {
	result->server = NULL;
	result->port_index = 0;
	result->fd_index = 0;
	result->server_fd = -1;
	}

	static void on_connect_result_set(on_connect_result *result,
	const grpc_tcp_server_acceptor *acceptor) {
	result->server = grpc_tcp_server_ref(acceptor->from_server);
	result->port_index = acceptor->port_index;
	result->fd_index = acceptor->fd_index;
	result->server_fd = grpc_tcp_server_port_fd(
	result->server, acceptor->port_index, acceptor->fd_index);
	}

	static void server_weak_ref_shutdown(grpc_exec_ctx exec_ctx, void arg,
	grpc_error *error) {
	server_weak_ref *weak_ref = arg;
	weak_ref->server = NULL;
	}

	static void server_weak_ref_init(server_weak_ref *weak_ref) {
	weak_ref->server = NULL;
	grpc_closure_init(&weak_ref->server_shutdown, server_weak_ref_shutdown,
	weak_ref);
	}

	/* Make weak_ref->server_shutdown a shutdown_starting cb on server.
	grpc_tcp_server promises that the server object will live until
	weak_ref->server_shutdown has returned. A strong ref on grpc_tcp_server
	should be held until server_weak_ref_set() returns to avoid a race where the
	server is deleted before the shutdown_starting cb is added. */
	static void server_weak_ref_set(server_weak_ref *weak_ref,
	grpc_tcp_server *server) {
	grpc_tcp_server_shutdown_starting_add(server, &weak_ref->server_shutdown);
	weak_ref->server = server;
	}

	static void on_connect(grpc_exec_ctx exec_ctx, void arg, grpc_endpoint *tcp,
	grpc_pollset *pollset,
	grpc_tcp_server_acceptor *acceptor) {
	grpc_endpoint_shutdown(exec_ctx, tcp);
	grpc_endpoint_destroy(exec_ctx, tcp);

	on_connect_result temp_result;
	on_connect_result_set(&temp_result, acceptor);

	gpr_mu_lock(g_mu);
	g_result = temp_result;
	g_nconnects++;
	GPR_ASSERT(
	GRPC_LOG_IF_ERROR("pollset_kick", grpc_pollset_kick(g_pollset, NULL)));
	gpr_mu_unlock(g_mu);
	}

	static void test_no_op(void) {
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_tcp_server *s;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
	grpc_tcp_server_unref(&exec_ctx, s);
	grpc_exec_ctx_finish(&exec_ctx);
	}

	static void test_no_op_with_start(void) {
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_tcp_server *s;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
	LOG_TEST("test_no_op_with_start");
	grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);
	grpc_tcp_server_unref(&exec_ctx, s);
	grpc_exec_ctx_finish(&exec_ctx);
	}

	static void test_no_op_with_port(void) {
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_resolved_address resolved_addr;
	struct sockaddr_in addr = (struct sockaddr_in )resolved_addr.addr;
	grpc_tcp_server *s;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
	LOG_TEST("test_no_op_with_port");

	memset(&resolved_addr, 0, sizeof(resolved_addr));
	resolved_addr.len = sizeof(struct sockaddr_in);
	addr->sin_family = AF_INET;
	int port;
	GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
	GRPC_ERROR_NONE &&
	port > 0);

	grpc_tcp_server_unref(&exec_ctx, s);
	grpc_exec_ctx_finish(&exec_ctx);
	}

	static void test_no_op_with_port_and_start(void) {
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_resolved_address resolved_addr;
	struct sockaddr_in addr = (struct sockaddr_in )resolved_addr.addr;
	grpc_tcp_server *s;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
	LOG_TEST("test_no_op_with_port_and_start");
	int port;

	memset(&resolved_addr, 0, sizeof(resolved_addr));
	resolved_addr.len = sizeof(struct sockaddr_in);
	addr->sin_family = AF_INET;
	GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr, &port) ==
	GRPC_ERROR_NONE &&
	port > 0);

	grpc_tcp_server_start(&exec_ctx, s, NULL, 0, on_connect, NULL);

	grpc_tcp_server_unref(&exec_ctx, s);
	grpc_exec_ctx_finish(&exec_ctx);
	}

	static void tcp_connect(grpc_exec_ctx exec_ctx, const struct sockaddr remote,
	socklen_t remote_len, on_connect_result *result) {
	gpr_timespec deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
	int clifd = socket(remote->sa_family, SOCK_STREAM, 0);
	int nconnects_before;

	gpr_mu_lock(g_mu);
	nconnects_before = g_nconnects;
	on_connect_result_init(&g_result);
	GPR_ASSERT(clifd >= 0);
	gpr_log(GPR_DEBUG, "start connect");
	GPR_ASSERT(connect(clifd, remote, remote_len) == 0);
	gpr_log(GPR_DEBUG, "wait");
	while (g_nconnects == nconnects_before &&
	gpr_time_cmp(deadline, gpr_now(deadline.clock_type)) > 0) {
	grpc_pollset_worker *worker = NULL;
	GPR_ASSERT(GRPC_LOG_IF_ERROR(
	"pollset_work",
	grpc_pollset_work(exec_ctx, g_pollset, &worker,
	gpr_now(GPR_CLOCK_MONOTONIC), deadline)));
	gpr_mu_unlock(g_mu);
	grpc_exec_ctx_finish(exec_ctx);
	gpr_mu_lock(g_mu);
	}
	gpr_log(GPR_DEBUG, "wait done");
	GPR_ASSERT(g_nconnects == nconnects_before + 1);
	close(clifd);
	*result = g_result;

	gpr_mu_unlock(g_mu);
	}

	/* Tests a tcp server with multiple ports. TODO(daniel-j-born): Multiple fds for
	the same port should be tested. */
	static void test_connect(unsigned n) {
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_resolved_address resolved_addr;
	grpc_resolved_address resolved_addr1;
	struct sockaddr_storage addr = (struct sockaddr_storage )resolved_addr.addr;
	struct sockaddr_storage *addr1 =
	(struct sockaddr_storage *)resolved_addr1.addr;
	unsigned svr_fd_count;
	int svr_port;
	unsigned svr1_fd_count;
	int svr1_port;
	grpc_tcp_server *s;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_create(&exec_ctx, NULL, NULL, &s));
	unsigned i;
	server_weak_ref weak_ref;
	server_weak_ref_init(&weak_ref);
	LOG_TEST("test_connect");
	gpr_log(GPR_INFO, "clients=%d", n);
	memset(&resolved_addr, 0, sizeof(resolved_addr));
	memset(&resolved_addr1, 0, sizeof(resolved_addr1));
	resolved_addr.len = sizeof(struct sockaddr_storage);
	resolved_addr1.len = sizeof(struct sockaddr_storage);
	addr->ss_family = addr1->ss_family = AF_INET;
	GPR_ASSERT(GRPC_ERROR_NONE ==
	grpc_tcp_server_add_port(s, &resolved_addr, &svr_port));
	GPR_ASSERT(svr_port > 0);
	/* Cannot use wildcard (port==0), because add_port() will try to reuse the
	same port as a previous add_port(). */
	svr1_port = grpc_pick_unused_port_or_die();
	grpc_sockaddr_set_port(&resolved_addr1, svr1_port);
	GPR_ASSERT(grpc_tcp_server_add_port(s, &resolved_addr1, &svr_port) ==
	GRPC_ERROR_NONE &&
	svr_port == svr1_port);

	/* Bad port_index. */
	GPR_ASSERT(grpc_tcp_server_port_fd_count(s, 2) == 0);
	GPR_ASSERT(grpc_tcp_server_port_fd(s, 2, 0) < 0);

	/* Bad fd_index. */
	GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 100) < 0);
	GPR_ASSERT(grpc_tcp_server_port_fd(s, 1, 100) < 0);

	/* Got at least one fd per port. */
	svr_fd_count = grpc_tcp_server_port_fd_count(s, 0);
	GPR_ASSERT(svr_fd_count >= 1);
	svr1_fd_count = grpc_tcp_server_port_fd_count(s, 1);
	GPR_ASSERT(svr1_fd_count >= 1);

	for (i = 0; i < svr_fd_count; ++i) {
	int fd = grpc_tcp_server_port_fd(s, 0, i);
	GPR_ASSERT(fd >= 0);
	if (i == 0) {
	GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr,
	(socklen_t *)&resolved_addr.len) == 0);
	GPR_ASSERT(resolved_addr.len <= sizeof(*addr));
	}
	}
	for (i = 0; i < svr1_fd_count; ++i) {
	int fd = grpc_tcp_server_port_fd(s, 1, i);
	GPR_ASSERT(fd >= 0);
	if (i == 0) {
	GPR_ASSERT(getsockname(fd, (struct sockaddr *)addr1,
	(socklen_t *)&resolved_addr1.len) == 0);
	GPR_ASSERT(resolved_addr1.len <= sizeof(*addr1));
	}
	}

	grpc_tcp_server_start(&exec_ctx, s, &g_pollset, 1, on_connect, NULL);

	for (i = 0; i < n; i++) {
	on_connect_result result;
	int svr_fd;
	on_connect_result_init(&result);
	tcp_connect(&exec_ctx, (struct sockaddr *)addr,
	(socklen_t)resolved_addr.len, &result);
	GPR_ASSERT(result.server_fd >= 0);
	svr_fd = result.server_fd;
	GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
	result.server_fd);
	GPR_ASSERT(result.port_index == 0);
	GPR_ASSERT(result.fd_index < svr_fd_count);
	GPR_ASSERT(result.server == s);
	if (weak_ref.server == NULL) {
	server_weak_ref_set(&weak_ref, result.server);
	}
	grpc_tcp_server_unref(&exec_ctx, result.server);

	on_connect_result_init(&result);
	tcp_connect(&exec_ctx, (struct sockaddr *)addr1,
	(socklen_t)resolved_addr1.len, &result);
	GPR_ASSERT(result.server_fd >= 0);
	GPR_ASSERT(result.server_fd != svr_fd);
	GPR_ASSERT(grpc_tcp_server_port_fd(s, result.port_index, result.fd_index) ==
	result.server_fd);
	GPR_ASSERT(result.port_index == 1);
	GPR_ASSERT(result.fd_index < svr_fd_count);
	GPR_ASSERT(result.server == s);
	grpc_tcp_server_unref(&exec_ctx, result.server);
	}

	/* Weak ref to server valid until final unref. */
	GPR_ASSERT(weak_ref.server != NULL);
	GPR_ASSERT(grpc_tcp_server_port_fd(s, 0, 0) >= 0);

	grpc_tcp_server_unref(&exec_ctx, s);
	grpc_exec_ctx_finish(&exec_ctx);

	/* Weak ref lost. */
	GPR_ASSERT(weak_ref.server == NULL);
	}

	static void destroy_pollset(grpc_exec_ctx exec_ctx, void p,
	grpc_error *error) {
	grpc_pollset_destroy(p);
	}

	int main(int argc, char **argv) {
	grpc_closure destroyed;
	grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
	grpc_test_init(argc, argv);
	grpc_init();
	g_pollset = gpr_malloc(grpc_pollset_size());
	grpc_pollset_init(g_pollset, &g_mu);

	test_no_op();
	test_no_op_with_start();
	test_no_op_with_port();
	test_no_op_with_port_and_start();
	test_connect(1);
	test_connect(10);

	grpc_closure_init(&destroyed, destroy_pollset, g_pollset);
	grpc_pollset_shutdown(&exec_ctx, g_pollset, &destroyed);
	grpc_exec_ctx_finish(&exec_ctx);
	grpc_shutdown();
	gpr_free(g_pollset);
	return 0;
	}

	#else /* GRPC_POSIX_SOCKET */

	int main(int argc, char **argv) { return 1; }

	#endif /* GRPC_POSIX_SOCKET */