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CURLOPT_DNS_INTERFACE(3)

CURLOPT_DNS_INTERFACE(3)   curl_easy_setopt options   CURLOPT_DNS_INTERFACE(3)



NAME
       CURLOPT_DNS_INTERFACE - interface to speak DNS over

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_INTERFACE, char *ifname);

DESCRIPTION
       Pass  a char * as parameter. Set the name of the network interface that
       the DNS resolver should bind to. This must be an interface name (not an
       address).  Set  this  option to NULL to use the default setting (do not
       bind to a specific interface).

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

DEFAULT
       NULL

PROTOCOLS
       All protocols except file:// - protocols that resolve host names.

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
         curl_easy_setopt(curl, CURLOPT_DNS_INTERFACE, "eth0");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY
       Added  in 7.33.0. This option also requires that libcurl was built with
       a resolver backend that supports this operation. The c-ares backend  is
       the only such one.

RETURN VALUE
       Returns  CURLE_OK  if  the option is supported, CURLE_UNKNOWN_OPTION if
       not, or CURLE_NOT_BUILT_IN if support was disabled at compile-time.

SEE ALSO
       CURLOPT_DNS_SERVERS(3), CURLOPT_DNS_LOCAL_IP4(3),



libcurl 7.86.0                September 05, 2022      CURLOPT_DNS_INTERFACE(3)
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