NAME

       CURLOPT_DNS_SERVERS - DNS servers to use

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_SERVERS, char *servers);

DESCRIPTION

       Pass  a  char  pointer  that  is  the list of DNS servers to be used instead of the system
       default. The format of the dns servers option is:

       host[:port][,host[:port]]...

       For example:

       192.168.1.100,192.168.1.101,3.4.5.6

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

DEFAULT

       NULL

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
           curl_easy_setopt(curl, CURLOPT_DNS_SERVERS,
                            "192.168.1.100:53,192.168.1.101");
           res = 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 7.24.0

RETURN VALUE

       Returns   CURLE_OK   if   the   option   is   supported,   CURLE_UNKNOWN_OPTION   if  not,
       CURLE_NOT_BUILT_IN if support was disabled  at  compile-time,  CURLE_BAD_FUNCTION_ARGUMENT
       when  given  an invalid server list, or CURLE_OUT_OF_MEMORY if there was insufficient heap
       space.

SEE ALSO

       CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_DNS_LOCAL_IP4(3), CURLOPT_DNS_LOCAL_IP6(3)