CURLOPT_DNS_LOCAL_IP6

Section: C Library Functions (3)
Updated: 202-0-19
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NAME

CURLOPT_DNS_LOCAL_IP6 - IPv6 address to bind DNS resolves to  

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_LOCAL_IP6, char *address);

 

DESCRIPTION

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.

Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again.  

DEFAULT

NULL  

PROTOCOLS

This functionality affects all supported protocols  

EXAMPLE

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

 

NOTES

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

AVAILABILITY

Added in curl 7.33.0  

RETURN VALUE

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).  

SEE ALSO

CURLOPT_DNS_INTERFACE(3), CURLOPT_DNS_LOCAL_IP4(3), CURLOPT_DNS_SERVERS(3)

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Index

NAME

SYNOPSIS

DESCRIPTION

DEFAULT

PROTOCOLS

EXAMPLE

NOTES

AVAILABILITY

RETURN VALUE

SEE ALSO