**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
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*
* Copyright (C) 1998 - 2017, 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.haxx.se/docs/copyright.html.
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* 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.
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**************************************************************************

CURLOPT_IPRESOLVE - specify which IP protocol version to use #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IPRESOLVE, long resolve); Allows an application to select what kind of IP addresses to use when resolving host names. This is only interesting when using host names that resolve addresses using more than one version of IP. The allowed values are: Default, resolves addresses to all IP versions that your system allows. Resolve to IPv4 addresses. Resolve to IPv6 addresses. CURL_IPRESOLVE_WHATEVER All

CURL *curl = curl_easy_init();
if(curl) {
 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");

 /* resolve host name using IPv6-names only */
 curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6);

 ret = curl_easy_perform(curl);

 curl_easy_cleanup(curl);
}

Always Returns CURLE_OK CURLOPT_HTTP_VERSION "(3), " CURLOPT_SSLVERSION "(3), "