| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at https://curl.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * SPDX-License-Identifier: curl |
| * |
| ***************************************************************************/ |
| /* <DESC> |
| * Websockets pingpong |
| * </DESC> |
| */ |
| |
| /* curl stuff */ |
| #include "curl_setup.h" |
| #include <curl/curl.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| /* somewhat unix-specific */ |
| #include <sys/time.h> |
| #include <unistd.h> |
| |
| #ifdef USE_WEBSOCKETS |
| |
| static CURLcode ping(CURL *curl, const char *send_payload) |
| { |
| size_t sent; |
| CURLcode result = |
| curl_ws_send(curl, send_payload, strlen(send_payload), &sent, 0, |
| CURLWS_PING); |
| fprintf(stderr, |
| "ws: curl_ws_send returned %u, sent %u\n", (int)result, (int)sent); |
| |
| return result; |
| } |
| |
| static CURLcode recv_pong(CURL *curl, const char *exected_payload) |
| { |
| size_t rlen; |
| struct curl_ws_frame *meta; |
| char buffer[256]; |
| CURLcode result = curl_ws_recv(curl, buffer, sizeof(buffer), &rlen, &meta); |
| if(result) { |
| fprintf(stderr, "ws: curl_ws_recv returned %u, received %ld\n", |
| (int)result, (long)rlen); |
| return result; |
| } |
| |
| if(!(meta->flags & CURLWS_PONG)) { |
| fprintf(stderr, "recv_pong: wrong frame, got %d bytes rflags %x\n", |
| (int)rlen, meta->flags); |
| return CURLE_RECV_ERROR; |
| } |
| |
| fprintf(stderr, "ws: got PONG back\n"); |
| if(rlen == strlen(exected_payload) && |
| !memcmp(exected_payload, buffer, rlen)) { |
| fprintf(stderr, "ws: got the same payload back\n"); |
| return CURLE_OK; |
| } |
| fprintf(stderr, "ws: did NOT get the same payload back\n"); |
| return CURLE_RECV_ERROR; |
| } |
| |
| /* just close the connection */ |
| static void websocket_close(CURL *curl) |
| { |
| size_t sent; |
| CURLcode result = |
| curl_ws_send(curl, "", 0, &sent, 0, CURLWS_CLOSE); |
| fprintf(stderr, |
| "ws: curl_ws_send returned %u, sent %u\n", (int)result, (int)sent); |
| } |
| |
| static CURLcode pingpong(CURL *curl, const char *payload) |
| { |
| CURLcode res; |
| int i; |
| |
| res = ping(curl, payload); |
| if(res) |
| return res; |
| for(i = 0; i < 10; ++i) { |
| fprintf(stderr, "Receive pong\n"); |
| res = recv_pong(curl, payload); |
| if(res == CURLE_AGAIN) { |
| usleep(100*1000); |
| continue; |
| } |
| websocket_close(curl); |
| return res; |
| } |
| websocket_close(curl); |
| return CURLE_RECV_ERROR; |
| } |
| |
| #endif |
| |
| int main(int argc, char *argv[]) |
| { |
| #ifdef USE_WEBSOCKETS |
| CURL *curl; |
| CURLcode res = CURLE_OK; |
| const char *url, *payload; |
| |
| if(argc != 3) { |
| fprintf(stderr, "usage: ws-pingpong url payload\n"); |
| return 2; |
| } |
| url = argv[1]; |
| payload = argv[2]; |
| |
| curl_global_init(CURL_GLOBAL_ALL); |
| |
| curl = curl_easy_init(); |
| if(curl) { |
| curl_easy_setopt(curl, CURLOPT_URL, url); |
| |
| /* use the callback style */ |
| curl_easy_setopt(curl, CURLOPT_USERAGENT, "ws-pingpong"); |
| curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); |
| curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 2L); /* websocket style */ |
| res = curl_easy_perform(curl); |
| fprintf(stderr, "curl_easy_perform() returned %u\n", (int)res); |
| if(res == CURLE_OK) |
| res = pingpong(curl, payload); |
| |
| /* always cleanup */ |
| curl_easy_cleanup(curl); |
| } |
| curl_global_cleanup(); |
| return (int)res; |
| |
| #else /* USE_WEBSOCKETS */ |
| (void)argc; |
| (void)argv; |
| fprintf(stderr, "websockets not enabled in libcurl\n"); |
| return 1; |
| #endif /* !USE_WEBSOCKETS */ |
| } |