Man pages sections > man3 > CURLOPT_IPRESOLVE

CURLOPT_IPRESOLVE - specify which IP protocol version to use

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),
May 5, 2017 libcurl 7.55.1