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/***************************************************************************
* _ _ ____ _
* 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>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>
/* curl stuff */
#include <curl/curl.h>
#include "../../../lib/curl_setup.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 */
}
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