Initial checkin of gRPC to third_party/

third_party/grpc/test/core/iomgr/tcp_server_posix_test.c

Index: third_party/grpc/test/core/iomgr/tcp_server_posix_test.c
diff --git a/third_party/grpc/test/core/iomgr/tcp_server_posix_test.c b/third_party/grpc/test/core/iomgr/tcp_server_posix_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..7933468355a77e06f778979a99052e26b139539d
--- /dev/null
+++ b/third_party/grpc/test/core/iomgr/tcp_server_posix_test.c
@@ -0,0 +1,333 @@
+/*
+ *
+ * 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/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/iomgr/iomgr.h"
+#include "src/core/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,
+                                     bool success) {
+  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_tcp_server_acceptor *acceptor) {
+  grpc_endpoint_shutdown(exec_ctx, tcp);
+  grpc_endpoint_destroy(exec_ctx, tcp);
+
+  gpr_mu_lock(g_mu);
+  on_connect_result_set(&g_result, acceptor);
+  g_nconnects++;
+  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 = grpc_tcp_server_create(NULL);
+  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 = grpc_tcp_server_create(NULL);
+  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;
+  struct sockaddr_in addr;
+  grpc_tcp_server *s = grpc_tcp_server_create(NULL);
+  LOG_TEST("test_no_op_with_port");
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  GPR_ASSERT(
+      grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr)) > 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;
+  struct sockaddr_in addr;
+  grpc_tcp_server *s = grpc_tcp_server_create(NULL);
+  LOG_TEST("test_no_op_with_port_and_start");
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  GPR_ASSERT(
+      grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, sizeof(addr)) > 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;
+    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;
+  struct sockaddr_storage addr;
+  struct sockaddr_storage addr1;
+  socklen_t addr_len = sizeof(addr);
+  unsigned svr_fd_count;
+  int svr_port;
+  unsigned svr1_fd_count;
+  int svr1_port;
+  grpc_tcp_server *s = grpc_tcp_server_create(NULL);
+  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(&addr, 0, sizeof(addr));
+  memset(&addr1, 0, sizeof(addr1));
+  addr.ss_family = addr1.ss_family = AF_INET;
+  svr_port = grpc_tcp_server_add_port(s, (struct sockaddr *)&addr, addr_len);
+  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((struct sockaddr *)&addr1, svr1_port);
+  GPR_ASSERT(grpc_tcp_server_add_port(s, (struct sockaddr *)&addr1, addr_len) ==
+             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, &addr_len) == 0);
+      GPR_ASSERT(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, &addr_len) == 0);
+      GPR_ASSERT(addr_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, 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, addr_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);
+
+  /* Weak ref lost. */
+  GPR_ASSERT(weak_ref.server == NULL);
+
+  grpc_exec_ctx_finish(&exec_ctx);
+}
+
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
+  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;
+}