keepalive.c (1829B)
1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24 /* <DESC> 25 * Use the TCP keep-alive options 26 * </DESC> 27 */ 28 #include <stdio.h> 29 #include <curl/curl.h> 30 31 int main(void) 32 { 33 CURL *curl; 34 CURLcode res = CURLE_OK; 35 36 curl = curl_easy_init(); 37 if(curl) { 38 /* enable TCP keep-alive for this transfer */ 39 curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L); 40 41 /* keep-alive idle time to 120 seconds */ 42 curl_easy_setopt(curl, CURLOPT_TCP_KEEPIDLE, 120L); 43 44 /* interval time between keep-alive probes: 60 seconds */ 45 curl_easy_setopt(curl, CURLOPT_TCP_KEEPINTVL, 60L); 46 47 /* maximum number of keep-alive probes: 3 */ 48 curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L); 49 50 curl_easy_setopt(curl, CURLOPT_URL, "https://curl.se/"); 51 52 res = curl_easy_perform(curl); 53 54 curl_easy_cleanup(curl); 55 } 56 57 return (int)res; 58 }