| /*************************************************************************** |
| * _ _ ____ _ |
| * 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> |
| * Use CURLOPT_CONNECT_TO to connect to "wrong" host name |
| * </DESC> |
| */ |
| #include <stdio.h> |
| #include <curl/curl.h> |
| |
| int main(void) |
| { |
| CURL *curl; |
| CURLcode res = CURLE_OK; |
| |
| /* |
| Each single string should be written using the format |
| HOST:PORT:CONNECT-TO-HOST:CONNECT-TO-PORT where HOST is the host of the |
| request, PORT is the port of the request, CONNECT-TO-HOST is the host name |
| to connect to, and CONNECT-TO-PORT is the port to connect to. |
| */ |
| /* instead of curl.se:443, it will resolve and use example.com:443 but in |
| other aspects work as if it still is curl.se */ |
| struct curl_slist *host = curl_slist_append(NULL, |
| "curl.se:443:example.com:443"); |
| |
| curl = curl_easy_init(); |
| if(curl) { |
| curl_easy_setopt(curl, CURLOPT_CONNECT_TO, host); |
| curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); |
| curl_easy_setopt(curl, CURLOPT_URL, "https://curl.se/"); |
| |
| /* since this connects to the wrong host, checking the host name in the |
| server certificate will fail, so unless we disable the check libcurl |
| returns CURLE_PEER_FAILED_VERIFICATION */ |
| curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L); |
| |
| /* Letting the wrong host name in the certificate be okay, the transfer |
| goes through but will (most likely) cause a 404 or similar because it |
| sends an unknown name in the Host: header field */ |
| res = curl_easy_perform(curl); |
| |
| /* always cleanup */ |
| curl_easy_cleanup(curl); |
| } |
| |
| curl_slist_free_all(host); |
| |
| return (int)res; |
| } |