Current File : //opt/cpanel/libcurl/share/doc/ea-libcurl-devel/connect-to.c
/***************************************************************************
* _ _ ____ _
* 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;
}
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