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Updated: Thursday, June 13, 2019
 
 

CURLOPT_DNS_SERVERS (3)

Name

CURLOPT_DNS_SERVERS - set preferred DNS servers

Synopsis

#include <curl/curl.h>

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

Description

CURLOPT_DNS_SERVERS(3)     curl_easy_setopt options     CURLOPT_DNS_SERVERS(3)



NAME
       CURLOPT_DNS_SERVERS - set preferred DNS servers

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Pass a char * 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 - use system default

PROTOCOLS
       All

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
         curl_easy_setopt(curl, CURLOPT_DNS_SERVERS, "192.168.1.100:53,192.168.1.101");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY
       This option requires that libcurl was built  with  a  resolver  backend
       that supports this operation. The c-ares backend is the only such one.

       Added in 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.


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


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | web/curl         |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+
SEE ALSO
       CURLOPT_DNS_LOCAL_IP4(3), CURLOPT_DNS_CACHE_TIMEOUT(3),



NOTES
       This    software    was    built    from    source     available     at
       https://github.com/oracle/solaris-userland.    The  original  community
       source   was    downloaded    from     https://github.com/curl/curl/ar-
       chive/curl-7_64_0.zip

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



libcurl 7.37.0                    19 Jun 2014           CURLOPT_DNS_SERVERS(3)