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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 establishing a connection or choosing one from the connection pool. This is interesting when using host names that resolve addresses using more than one version of IP. The allowed values are: CURL_IPRESOLVE_WHATEVER Default, can use addresses of all IP versions that your system allows. CURL_IPRESOLVE_V4 Uses only IPv4 addresses. CURL_IPRESOLVE_V6 Uses only 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"); /* of all addresses example.com resolves to, only IPv6 ones are used */ 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 7.78.0 April 24, 2021 CURLOPT_IPRESOLVE(3)

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