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CURLOPT_IPRESOLVE(3)       curl_easy_setopt options       CURLOPT_IPRESOLVE(3)

NAME
       CURLOPT_IPRESOLVE - specify which IP protocol version to use

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IPRESOLVE, long
       resolve);

DESCRIPTION
       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:

       CURL_IPRESOLVE_WHATEVER
              Default, resolves addresses to all IP versions that your system
              allows.

       CURL_IPRESOLVE_V4
              Resolve to IPv4 addresses.

       CURL_IPRESOLVE_V6
              Resolve to IPv6 addresses.

DEFAULT
       CURL_IPRESOLVE_WHATEVER

PROTOCOLS
       All

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://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);
       }

AVAILABILITY
       Always

RETURN VALUE
       Returns CURLE_OK

SEE ALSO
       CURLOPT_HTTP_VERSION(3), CURLOPT_SSLVERSION(3),

libcurl 7.68.0                    May 5, 2017             CURLOPT_IPRESOLVE(3)