DragonFly On-Line Manual Pages

Search: Section:  

CURLOPT_DNS_INTERFACE(3)            libcurl           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),

ibcurl 8.1.2                    April 26, 2023        CURLOPT_DNS_INTERFACE(3)

Search: Section: