Initial checkin of gRPC to third_party/

third_party/grpc/test/core/end2end/dualstack_socket_test.c

Index: third_party/grpc/test/core/end2end/dualstack_socket_test.c
diff --git a/third_party/grpc/test/core/end2end/dualstack_socket_test.c b/third_party/grpc/test/core/end2end/dualstack_socket_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..58e13a4098bd2e9c1c8774d405d22b2668001469
--- /dev/null
+++ b/third_party/grpc/test/core/end2end/dualstack_socket_test.c
@@ -0,0 +1,346 @@
+/*
+ *
+ * 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 <string.h>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/support/string.h"
+#include "src/core/iomgr/resolve_address.h"
+#include "src/core/iomgr/socket_utils_posix.h"
+
+#include "test/core/end2end/cq_verifier.h"
+#include "test/core/util/port.h"
+#include "test/core/util/test_config.h"
+
+/* This test exercises IPv4, IPv6, and dualstack sockets in various ways. */
+
+static void *tag(intptr_t i) { return (void *)i; }
+
+static gpr_timespec ms_from_now(int ms) {
+  return GRPC_TIMEOUT_MILLIS_TO_DEADLINE(ms);
+}
+
+static void drain_cq(grpc_completion_queue *cq) {
+  grpc_event ev;
+  do {
+    ev = grpc_completion_queue_next(cq, ms_from_now(5000), NULL);
+  } while (ev.type != GRPC_QUEUE_SHUTDOWN);
+}
+
+static void do_nothing(void *ignored) {}
+
+void test_connect(const char *server_host, const char *client_host, int port,
+                  int expect_ok) {
+  char *client_hostport;
+  char *server_hostport;
+  grpc_channel *client;
+  grpc_server *server;
+  grpc_completion_queue *cq;
+  grpc_call *c;
+  grpc_call *s;
+  cq_verifier *cqv;
+  gpr_timespec deadline;
+  int got_port;
+  grpc_op ops[6];
+  grpc_op *op;
+  grpc_metadata_array initial_metadata_recv;
+  grpc_metadata_array trailing_metadata_recv;
+  grpc_metadata_array request_metadata_recv;
+  grpc_status_code status;
+  grpc_call_error error;
+  char *details = NULL;
+  size_t details_capacity = 0;
+  int was_cancelled = 2;
+  grpc_call_details call_details;
+  char *peer;
+
+  if (port == 0) {
+    port = grpc_pick_unused_port_or_die();
+  }
+
+  gpr_join_host_port(&server_hostport, server_host, port);
+
+  grpc_metadata_array_init(&initial_metadata_recv);
+  grpc_metadata_array_init(&trailing_metadata_recv);
+  grpc_metadata_array_init(&request_metadata_recv);
+  grpc_call_details_init(&call_details);
+
+  /* Create server. */
+  cq = grpc_completion_queue_create(NULL);
+  server = grpc_server_create(NULL, NULL);
+  grpc_server_register_completion_queue(server, cq, NULL);
+  GPR_ASSERT((got_port = grpc_server_add_insecure_http2_port(
+                  server, server_hostport)) > 0);
+  if (port == 0) {
+    port = got_port;
+  } else {
+    GPR_ASSERT(port == got_port);
+  }
+  grpc_server_start(server);
+  cqv = cq_verifier_create(cq);
+
+  /* Create client. */
+  if (client_host[0] == 'i') {
+    /* for ipv4:/ipv6: addresses, concatenate the port to each of the parts */
+    size_t i;
+    gpr_slice uri_slice;
+    gpr_slice_buffer uri_parts;
+    char **hosts_with_port;
+
+    uri_slice =
+        gpr_slice_new((char *)client_host, strlen(client_host), do_nothing);
+    gpr_slice_buffer_init(&uri_parts);
+    gpr_slice_split(uri_slice, ",", &uri_parts);
+    hosts_with_port = gpr_malloc(sizeof(char *) * uri_parts.count);
+    for (i = 0; i < uri_parts.count; i++) {
+      char *uri_part_str = gpr_dump_slice(uri_parts.slices[i], GPR_DUMP_ASCII);
+      gpr_asprintf(&hosts_with_port[i], "%s:%d", uri_part_str, port);
+      gpr_free(uri_part_str);
+    }
+    client_hostport = gpr_strjoin_sep((const char **)hosts_with_port,
+                                      uri_parts.count, ",", NULL);
+    for (i = 0; i < uri_parts.count; i++) {
+      gpr_free(hosts_with_port[i]);
+    }
+    gpr_free(hosts_with_port);
+    gpr_slice_buffer_destroy(&uri_parts);
+    gpr_slice_unref(uri_slice);
+  } else {
+    gpr_join_host_port(&client_hostport, client_host, port);
+  }
+  client = grpc_insecure_channel_create(client_hostport, NULL, NULL);
+
+  gpr_log(GPR_INFO, "Testing with server=%s client=%s (expecting %s)",
+          server_hostport, client_hostport, expect_ok ? "success" : "failure");
+
+  gpr_free(client_hostport);
+  gpr_free(server_hostport);
+
+  if (expect_ok) {
+    /* Normal deadline, shouldn't be reached. */
+    deadline = ms_from_now(60000);
+  } else {
+    /* Give up faster when failure is expected.
+       BUG: Setting this to 1000 reveals a memory leak (b/18608927). */
+    deadline = ms_from_now(1500);
+  }
+
+  /* Send a trivial request. */
+  c = grpc_channel_create_call(client, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
+                               "/foo", "foo.test.google.fr", deadline, NULL);
+  GPR_ASSERT(c);
+
+  op = ops;
+  op->op = GRPC_OP_SEND_INITIAL_METADATA;
+  op->data.send_initial_metadata.count = 0;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_INITIAL_METADATA;
+  op->data.recv_initial_metadata = &initial_metadata_recv;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+  op->data.recv_status_on_client.trailing_metadata = &trailing_metadata_recv;
+  op->data.recv_status_on_client.status = &status;
+  op->data.recv_status_on_client.status_details = &details;
+  op->data.recv_status_on_client.status_details_capacity = &details_capacity;
+  op->flags = 0;
+  op->reserved = NULL;
+  op++;
+  error = grpc_call_start_batch(c, ops, (size_t)(op - ops), tag(1), NULL);
+  GPR_ASSERT(GRPC_CALL_OK == error);
+
+  if (expect_ok) {
+    /* Check for a successful request. */
+    error = grpc_server_request_call(server, &s, &call_details,
+                                     &request_metadata_recv, cq, cq, tag(101));
+    GPR_ASSERT(GRPC_CALL_OK == error);
+    cq_expect_completion(cqv, tag(101), 1);
+    cq_verify(cqv);
+
+    op = ops;
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->data.send_initial_metadata.count = 0;
+    op->flags = 0;
+    op++;
+    op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+    op->data.send_status_from_server.trailing_metadata_count = 0;
+    op->data.send_status_from_server.status = GRPC_STATUS_UNIMPLEMENTED;
+    op->data.send_status_from_server.status_details = "xyz";
+    op->flags = 0;
+    op++;
+    op->op = GRPC_OP_RECV_CLOSE_ON_SERVER;
+    op->data.recv_close_on_server.cancelled = &was_cancelled;
+    op->flags = 0;
+    op++;
+    error = grpc_call_start_batch(s, ops, (size_t)(op - ops), tag(102), NULL);
+    GPR_ASSERT(GRPC_CALL_OK == error);
+
+    cq_expect_completion(cqv, tag(102), 1);
+    cq_expect_completion(cqv, tag(1), 1);
+    cq_verify(cqv);
+
+    peer = grpc_call_get_peer(c);
+    gpr_log(GPR_DEBUG, "got peer: '%s'", peer);
+    gpr_free(peer);
+
+    GPR_ASSERT(status == GRPC_STATUS_UNIMPLEMENTED);
+    GPR_ASSERT(0 == strcmp(details, "xyz"));
+    GPR_ASSERT(0 == strcmp(call_details.method, "/foo"));
+    GPR_ASSERT(0 == strcmp(call_details.host, "foo.test.google.fr"));
+    GPR_ASSERT(was_cancelled == 1);
+
+    grpc_call_destroy(s);
+  } else {
+    /* Check for a failed connection. */
+    cq_expect_completion(cqv, tag(1), 1);
+    cq_verify(cqv);
+
+    GPR_ASSERT(status == GRPC_STATUS_DEADLINE_EXCEEDED);
+  }
+
+  grpc_call_destroy(c);
+
+  cq_verifier_destroy(cqv);
+
+  /* Destroy client. */
+  grpc_channel_destroy(client);
+
+  /* Destroy server. */
+  grpc_server_shutdown_and_notify(server, cq, tag(1000));
+  GPR_ASSERT(grpc_completion_queue_pluck(cq, tag(1000),
+                                         GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5),
+                                         NULL).type == GRPC_OP_COMPLETE);
+  grpc_server_destroy(server);
+  grpc_completion_queue_shutdown(cq);
+  drain_cq(cq);
+  grpc_completion_queue_destroy(cq);
+
+  grpc_metadata_array_destroy(&initial_metadata_recv);
+  grpc_metadata_array_destroy(&trailing_metadata_recv);
+  grpc_metadata_array_destroy(&request_metadata_recv);
+
+  grpc_call_details_destroy(&call_details);
+  gpr_free(details);
+}
+
+int external_dns_works(const char *host) {
+  grpc_resolved_addresses *res = grpc_blocking_resolve_address(host, "80");
+  if (res != NULL) {
+    grpc_resolved_addresses_destroy(res);
+    return 1;
+  }
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  int do_ipv6 = 1;
+
+  grpc_test_init(argc, argv);
+  grpc_init();
+
+  if (!grpc_ipv6_loopback_available()) {
+    gpr_log(GPR_INFO, "Can't bind to ::1.  Skipping IPv6 tests.");
+    do_ipv6 = 0;
+  }
+
+  /* For coverage, test with and without dualstack sockets. */
+  for (grpc_forbid_dualstack_sockets_for_testing = 0;
+       grpc_forbid_dualstack_sockets_for_testing <= 1;
+       grpc_forbid_dualstack_sockets_for_testing++) {
+    /* :: and 0.0.0.0 are handled identically. */
+    test_connect("::", "127.0.0.1", 0, 1);
+    test_connect("::", "::ffff:127.0.0.1", 0, 1);
+    test_connect("::", "ipv4:127.0.0.1", 0, 1);
+    test_connect("::", "ipv6:[::ffff:127.0.0.1]", 0, 1);
+    test_connect("::", "localhost", 0, 1);
+    test_connect("0.0.0.0", "127.0.0.1", 0, 1);
+    test_connect("0.0.0.0", "::ffff:127.0.0.1", 0, 1);
+    test_connect("0.0.0.0", "ipv4:127.0.0.1", 0, 1);
+    test_connect("0.0.0.0", "ipv4:127.0.0.1,127.0.0.2,127.0.0.3", 0, 1);
+    test_connect("0.0.0.0", "ipv6:[::ffff:127.0.0.1],[::ffff:127.0.0.2]", 0, 1);
+    test_connect("0.0.0.0", "localhost", 0, 1);
+    if (do_ipv6) {
+      test_connect("::", "::1", 0, 1);
+      test_connect("0.0.0.0", "::1", 0, 1);
+      test_connect("::", "ipv6:[::1]", 0, 1);
+      test_connect("0.0.0.0", "ipv6:[::1]", 0, 1);
+    }
+
+    /* These only work when the families agree. */
+    test_connect("127.0.0.1", "127.0.0.1", 0, 1);
+    test_connect("127.0.0.1", "ipv4:127.0.0.1", 0, 1);
+    if (do_ipv6) {
+      test_connect("::1", "::1", 0, 1);
+      test_connect("::1", "127.0.0.1", 0, 0);
+      test_connect("127.0.0.1", "::1", 0, 0);
+      test_connect("::1", "ipv6:[::1]", 0, 1);
+      test_connect("::1", "ipv4:127.0.0.1", 0, 0);
+      test_connect("127.0.0.1", "ipv6:[::1]", 0, 0);
+    }
+
+    if (!external_dns_works("loopback46.unittest.grpc.io")) {
+      gpr_log(GPR_INFO, "Skipping tests that depend on *.unittest.grpc.io.");
+    } else {
+      test_connect("loopback46.unittest.grpc.io", "loopback4.unittest.grpc.io",
+                   0, 1);
+      test_connect("loopback4.unittest.grpc.io", "loopback46.unittest.grpc.io",
+                   0, 1);
+      if (do_ipv6) {
+        test_connect("loopback46.unittest.grpc.io",
+                     "loopback6.unittest.grpc.io", 0, 1);
+        test_connect("loopback6.unittest.grpc.io",
+                     "loopback46.unittest.grpc.io", 0, 1);
+        test_connect("loopback4.unittest.grpc.io", "loopback6.unittest.grpc.io",
+                     0, 0);
+        test_connect("loopback6.unittest.grpc.io", "loopback4.unittest.grpc.io",
+                     0, 0);
+      }
+    }
+  }
+
+  grpc_shutdown();
+
+  return 0;
+}