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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, 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.haxx.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:  ***************************************************************************/
   22: /* <DESC>
   23:  * Use CURLOPT_RESOLVE to feed custom IP addresses for given host name + port
   24:  * number combinations.
   25:  * </DESC>
   26:  */
   27: #include <stdio.h>
   28: #include <curl/curl.h>
   29: 
   30: int main(void)
   31: {
   32:   CURL *curl;
   33:   CURLcode res = CURLE_OK;
   34: 
   35:   /* Each single name resolve string should be written using the format
   36:      HOST:PORT:ADDRESS where HOST is the name libcurl will try to resolve,
   37:      PORT is the port number of the service where libcurl wants to connect to
   38:      the HOST and ADDRESS is the numerical IP address
   39:    */
   40:   struct curl_slist *host = curl_slist_append(NULL,
   41:                                               "example.com:443:127.0.0.1");
   42: 
   43:   curl = curl_easy_init();
   44:   if(curl) {
   45:     curl_easy_setopt(curl, CURLOPT_RESOLVE, host);
   46:     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
   47:     res = curl_easy_perform(curl);
   48: 
   49:     /* always cleanup */
   50:     curl_easy_cleanup(curl);
   51:   }
   52: 
   53:   curl_slist_free_all(host);
   54: 
   55:   return (int)res;
   56: }