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.TH CURLOPT_IPRESOLVE 3 "April 24, 2021" "libcurl 7.77.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_IPRESOLVE \- specify which IP protocol version to use
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IPRESOLVE, long resolve);
.SH 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:
.IP CURL_IPRESOLVE_WHATEVER
Default, can use addresses of all IP versions that your system allows.
.IP CURL_IPRESOLVE_V4
Uses only IPv4 addresses.
.IP CURL_IPRESOLVE_V6
Uses only IPv6 addresses.
.SH DEFAULT
CURL_IPRESOLVE_WHATEVER
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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);
}
.fi

.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_HTTP_VERSION "(3), " CURLOPT_SSLVERSION "(3), "
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