interface.c (1760B)
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 CURLOPT_INTERFACE to bind the outgoing socket to an interface 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 /* The interface needs to be a local existing interface over which you can 39 connect to the host in the URL. It can also specify an IP address, but 40 that address needs to be assigned one of the local network 41 interfaces. */ 42 curl_easy_setopt(curl, CURLOPT_INTERFACE, "enp3s0"); 43 curl_easy_setopt(curl, CURLOPT_URL, "https://curl.se/"); 44 45 res = curl_easy_perform(curl); 46 47 /* always cleanup */ 48 curl_easy_cleanup(curl); 49 } 50 51 return (int)res; 52 }