| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #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/lib/iomgr/endpoint.h" |
| #include "src/core/lib/iomgr/sockaddr.h" |
| #include "src/core/lib/iomgr/tcp_server.h" |
| #include "test/core/util/port.h" |
| #include "test/core/util/test_tcp_server.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; |
| int max_reconnect_backoff_ms = 120 * 1000; |
| if (server->max_reconnect_backoff_ms > 0) { |
| max_reconnect_backoff_ms = server->max_reconnect_backoff_ms; |
| } |
| if (expected_backoff > max_reconnect_backoff_ms) { |
| expected_backoff = max_reconnect_backoff_ms; |
| } |
| } |
| } |
| |
| static void on_connect(void* arg, grpc_endpoint* tcp, |
| grpc_pollset* accepting_pollset, |
| grpc_tcp_server_acceptor* acceptor) { |
| gpr_free(acceptor); |
| 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(tcp, |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("Connected")); |
| grpc_endpoint_destroy(tcp); |
| if (peer) { |
| last_colon = strrchr(peer, ':'); |
| if (server->peer == nullptr) { |
| server->peer = peer; |
| } else { |
| if (last_colon == nullptr) { |
| 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 = static_cast<timestamp_list*>(gpr_malloc(sizeof(timestamp_list))); |
| new_tail->timestamp = now; |
| new_tail->next = nullptr; |
| if (server->tail == nullptr) { |
| 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) { |
| test_tcp_server_init(&server->tcp_server, on_connect, server); |
| server->head = nullptr; |
| server->tail = nullptr; |
| server->peer = nullptr; |
| server->max_reconnect_backoff_ms = 0; |
| } |
| |
| void reconnect_server_start(reconnect_server* server, int port) { |
| test_tcp_server_start(&server->tcp_server, port); |
| } |
| |
| void reconnect_server_poll(reconnect_server* server, int seconds) { |
| test_tcp_server_poll(&server->tcp_server, seconds); |
| } |
| |
| 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 = nullptr; |
| gpr_free(server->peer); |
| server->peer = nullptr; |
| } |
| |
| void reconnect_server_destroy(reconnect_server* server) { |
| reconnect_server_clear_timestamps(server); |
| test_tcp_server_destroy(&server->tcp_server); |
| } |