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Updated: Wednesday, July 27, 2022
 
 

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

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
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.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | web/curl         |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+

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



NOTES
       Source code for open source software components in Oracle  Solaris  can
       be found at https://www.oracle.com/downloads/opensource/solaris-source-
       code-downloads.html.

       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source      was      downloaded       from        https://curl.se/down-
       load/curl-7.83.1.tar.bz2.

       Further information about this software can be found on the open source
       community website at http://curl.haxx.se/.



libcurl 7.83.1                 November 26, 2021      CURLOPT_DNS_INTERFACE(3)