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CURLOPT_DNS_LOCAL_IP6(3) curl_easy_setopt options CURLOPT_DNS_LOCAL_IP6(3)

CURLOPT_DNS_LOCAL_IP6 - IPv6 address to bind DNS resolves to

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_LOCAL_IP6, char *address);

Set the local IPv6 address that the resolver should bind to. The argument should be of type char * and contain a single IPv6 address as a string. Set this option to NULL to use the default setting (do not bind to a specific IP address).

The application does not have to keep the string around after setting this option.

NULL

All

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
  curl_easy_setopt(curl, CURLOPT_DNS_LOCAL_IP6, "fe80::a9ff:fe46:b619");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

This option requires that libcurl was built with a resolver backend that supports this operation. The c-ares backend is the only such one.

Added in 7.33.0

Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, CURLE_NOT_BUILT_IN if support was disabled at compile-time, or CURLE_BAD_FUNCTION_ARGUMENT when given a bad address.

CURLOPT_DNS_INTERFACE(3), CURLOPT_DNS_LOCAL_IP4(3),
November 26, 2021 libcurl 7.83.1

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