resolve.c (1984B)
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_RESOLVE to feed custom IP addresses for given hostname + port 26 * number combinations. 27 * </DESC> 28 */ 29 #include <stdio.h> 30 #include <curl/curl.h> 31 32 int main(void) 33 { 34 CURL *curl; 35 CURLcode res = CURLE_OK; 36 37 /* Each single name resolve string should be written using the format 38 HOST:PORT:ADDRESS where HOST is the name libcurl tries to resolve, PORT 39 is the port number of the service where libcurl wants to connect to the 40 HOST and ADDRESS is the numerical IP address 41 */ 42 struct curl_slist *host = curl_slist_append(NULL, 43 "example.com:443:127.0.0.1"); 44 45 curl = curl_easy_init(); 46 if(curl) { 47 curl_easy_setopt(curl, CURLOPT_RESOLVE, host); 48 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 49 res = curl_easy_perform(curl); 50 51 /* always cleanup */ 52 curl_easy_cleanup(curl); 53 } 54 55 curl_slist_free_all(host); 56 57 return (int)res; 58 }