| /* |
| * |
| * 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 "test/core/util/reconnect_server.h" |
| |
| #include <grpc/grpc.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/host_port.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/time.h> |
| #include <string.h> |
| #include "src/core/iomgr/endpoint.h" |
| #include "src/core/iomgr/sockaddr.h" |
| #include "src/core/iomgr/tcp_server.h" |
| #include "test/core/util/port.h" |
| |
| static void |
| pretty_print_backoffs (reconnect_server * server) |
| { |
| gpr_timespec diff; |
| int i = 1; |
| double expected_backoff = 1000.0, backoff; |
| timestamp_list *head = server->head; |
| gpr_log (GPR_INFO, "reconnect server: new connection"); |
| for (head = server->head; head && head->next; head = head->next, i++) |
| { |
| diff = gpr_time_sub (head->next->timestamp, head->timestamp); |
| backoff = gpr_time_to_millis (diff); |
| gpr_log (GPR_INFO, "retry %2d:backoff %6.2fs,expected backoff %6.2fs, jitter %4.2f%%", i, backoff / 1000.0, expected_backoff / 1000.0, (backoff - expected_backoff) * 100.0 / expected_backoff); |
| expected_backoff *= 1.6; |
| if (expected_backoff > 120 * 1000) |
| { |
| expected_backoff = 120 * 1000; |
| } |
| } |
| } |
| |
| static void |
| on_connect (grpc_exec_ctx * exec_ctx, void *arg, grpc_endpoint * tcp) |
| { |
| char *peer; |
| char *last_colon; |
| reconnect_server *server = (reconnect_server *) arg; |
| gpr_timespec now = gpr_now (GPR_CLOCK_REALTIME); |
| timestamp_list *new_tail; |
| peer = grpc_endpoint_get_peer (tcp); |
| grpc_endpoint_shutdown (exec_ctx, tcp); |
| grpc_endpoint_destroy (exec_ctx, tcp); |
| if (peer) |
| { |
| last_colon = strrchr (peer, ':'); |
| if (server->peer == NULL) |
| { |
| server->peer = peer; |
| } |
| else |
| { |
| if (last_colon == NULL) |
| { |
| gpr_log (GPR_ERROR, "peer does not contain a ':'"); |
| } |
| else if (strncmp (server->peer, peer, (size_t) (last_colon - peer)) != 0) |
| { |
| gpr_log (GPR_ERROR, "mismatched peer! %s vs %s", server->peer, peer); |
| } |
| gpr_free (peer); |
| } |
| } |
| new_tail = gpr_malloc (sizeof (timestamp_list)); |
| new_tail->timestamp = now; |
| new_tail->next = NULL; |
| if (server->tail == NULL) |
| { |
| server->head = new_tail; |
| server->tail = new_tail; |
| } |
| else |
| { |
| server->tail->next = new_tail; |
| server->tail = new_tail; |
| } |
| pretty_print_backoffs (server); |
| } |
| |
| void |
| reconnect_server_init (reconnect_server * server) |
| { |
| grpc_init (); |
| server->tcp_server = NULL; |
| grpc_pollset_init (&server->pollset); |
| server->pollsets[0] = &server->pollset; |
| server->head = NULL; |
| server->tail = NULL; |
| server->peer = NULL; |
| } |
| |
| void |
| reconnect_server_start (reconnect_server * server, int port) |
| { |
| struct sockaddr_in addr; |
| int port_added; |
| grpc_closure_list closure_list = GRPC_CLOSURE_LIST_INIT; |
| |
| addr.sin_family = AF_INET; |
| addr.sin_port = htons ((gpr_uint16) port); |
| memset (&addr.sin_addr, 0, sizeof (addr.sin_addr)); |
| |
| server->tcp_server = grpc_tcp_server_create (); |
| port_added = grpc_tcp_server_add_port (server->tcp_server, &addr, sizeof (addr)); |
| GPR_ASSERT (port_added == port); |
| |
| grpc_tcp_server_start (server->tcp_server, server->pollsets, 1, on_connect, server, &closure_list); |
| gpr_log (GPR_INFO, "reconnect tcp server listening on 0.0.0.0:%d", port); |
| |
| grpc_closure_list_run (&closure_list); |
| } |
| |
| void |
| reconnect_server_poll (reconnect_server * server, int seconds) |
| { |
| grpc_pollset_worker worker; |
| gpr_timespec deadline = gpr_time_add (gpr_now (GPR_CLOCK_MONOTONIC), |
| gpr_time_from_seconds (seconds, GPR_TIMESPAN)); |
| grpc_closure_list closure_list = GRPC_CLOSURE_LIST_INIT; |
| gpr_mu_lock (GRPC_POLLSET_MU (&server->pollset)); |
| grpc_pollset_work (&server->pollset, &worker, gpr_now (GPR_CLOCK_MONOTONIC), deadline, &closure_list); |
| gpr_mu_unlock (GRPC_POLLSET_MU (&server->pollset)); |
| grpc_closure_list_run (&closure_list); |
| } |
| |
| void |
| reconnect_server_clear_timestamps (reconnect_server * server) |
| { |
| timestamp_list *new_head = server->head; |
| while (server->head) |
| { |
| new_head = server->head->next; |
| gpr_free (server->head); |
| server->head = new_head; |
| } |
| server->tail = NULL; |
| gpr_free (server->peer); |
| server->peer = NULL; |
| } |
| |
| static void |
| do_nothing (grpc_exec_ctx * exec_ctx, void *ignored, int success) |
| { |
| } |
| |
| void |
| reconnect_server_destroy (reconnect_server * server) |
| { |
| grpc_closure_list closure_list = GRPC_CLOSURE_LIST_INIT; |
| grpc_closure do_nothing_closure[2]; |
| grpc_closure_init (&do_nothing_closure[0], do_nothing, NULL); |
| grpc_closure_init (&do_nothing_closure[1], do_nothing, NULL); |
| grpc_tcp_server_destroy (server->tcp_server, &do_nothing_closure[0], &closure_list); |
| reconnect_server_clear_timestamps (server); |
| grpc_pollset_shutdown (&server->pollset, &do_nothing_closure[1], &closure_list); |
| grpc_closure_list_run (&closure_list); |
| grpc_pollset_destroy (&server->pollset); |
| grpc_shutdown (); |
| } |