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