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| .TH CURLOPT_DNS_INTERFACE 3 "October 31, 2021" "libcurl 7.80.0" "curl_easy_setopt options" |
| |
| .SH NAME |
| CURLOPT_DNS_INTERFACE \- interface to speak DNS over |
| .SH SYNOPSIS |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_INTERFACE, char *ifname); |
| .SH 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. |
| .SH DEFAULT |
| NULL |
| .SH PROTOCOLS |
| .SH EXAMPLE |
| .nf |
| 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); |
| } |
| .fi |
| .SH 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. |
| .SH 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. |
| .SH "SEE ALSO" |
| .BR CURLOPT_DNS_SERVERS "(3), " CURLOPT_DNS_LOCAL_IP4 "(3), " |
