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                     23: .TH CURLOPT_DNS_INTERFACE 3 "May 31, 2017" "libcurl 7.70.0" "curl_easy_setopt options"
                     24: 
                     25: .SH NAME
                     26: CURLOPT_DNS_INTERFACE \- set interface to speak DNS over
                     27: .SH SYNOPSIS
                     28: #include <curl/curl.h>
                     29: 
                     30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_INTERFACE, char *ifname);
                     31: .SH DESCRIPTION
                     32: Pass a char * as parameter. Set the name of the network interface that the DNS
                     33: resolver should bind to. This must be an interface name (not an address). Set
                     34: this option to NULL to use the default setting (don't bind to a specific
                     35: interface).
                     36: 
                     37: The application does not have to keep the string around after setting this
                     38: option.
                     39: .SH DEFAULT
                     40: NULL
                     41: .SH PROTOCOLS
                     42: .SH EXAMPLE
                     43: .nf
                     44: CURL *curl = curl_easy_init();
                     45: if(curl) {
                     46:   curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
                     47:   curl_easy_setopt(curl, CURLOPT_DNS_INTERFACE, "eth0");
                     48:   ret = curl_easy_perform(curl);
                     49:   curl_easy_cleanup(curl);
                     50: }
                     51: .fi
                     52: .SH AVAILABILITY
                     53: Added in 7.33.0. This option also requires that libcurl was built with a
                     54: resolver backend that supports this operation. The c-ares backend is the only
                     55: such one.
                     56: .SH RETURN VALUE
                     57: Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not,
                     58: or CURLE_NOT_BUILT_IN if support was disabled at compile-time.
                     59: .SH "SEE ALSO"
                     60: .BR CURLOPT_DNS_SERVERS "(3), " CURLOPT_DNS_LOCAL_IP4 "(3), "