CURLOPT_IPRESOLVE
Section: curl_easy_setopt options (3)
Updated: November 04, 2020
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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, "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);
}
AVAILABILITY
Always
RETURN VALUE
Returns CURLE_OK
SEE ALSO
CURLOPT_HTTP_VERSION(3),
CURLOPT_SSLVERSION(3),