| /* |
| * |
| * 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_exec_ctx exec_ctx = GRPC_EXEC_CTX_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(&exec_ctx, server->tcp_server, server->pollsets, 1, |
| on_connect, server); |
| gpr_log(GPR_INFO, "reconnect tcp server listening on 0.0.0.0:%d", port); |
| |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| 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_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| gpr_mu_lock(GRPC_POLLSET_MU(&server->pollset)); |
| grpc_pollset_work(&exec_ctx, &server->pollset, &worker, |
| gpr_now(GPR_CLOCK_MONOTONIC), deadline); |
| gpr_mu_unlock(GRPC_POLLSET_MU(&server->pollset)); |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| 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_exec_ctx exec_ctx = GRPC_EXEC_CTX_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(&exec_ctx, server->tcp_server, |
| &do_nothing_closure[0]); |
| reconnect_server_clear_timestamps(server); |
| grpc_pollset_shutdown(&exec_ctx, &server->pollset, &do_nothing_closure[1]); |
| grpc_exec_ctx_finish(&exec_ctx); |
| grpc_pollset_destroy(&server->pollset); |
| grpc_shutdown(); |
| } |