CURLOPT_DNS_SERVERS(3)

1CURLOPT_DNS_SERVERS(3)     curl_easy_setopt options     CURLOPT_DNS_SERVERS(3)
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NAME

6       CURLOPT_DNS_SERVERS - DNS servers to use
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_SERVERS, char *servers);
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DESCRIPTION

14       Pass a char * that is the list of DNS servers to be used instead of the
15       system default. The format of the dns servers option is:
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17       host[:port][,host[:port]]...
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19       For example:
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21       192.168.1.100,192.168.1.101,3.4.5.6
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23       The application does not have to keep the string around  after  setting
24       this option.
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DEFAULT

27       NULL - use system default
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PROTOCOLS

30       All
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EXAMPLE

33       CURL *curl = curl_easy_init();
34       if(curl) {
35         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
36         curl_easy_setopt(curl, CURLOPT_DNS_SERVERS, "192.168.1.100:53,192.168.1.101");
37         ret = curl_easy_perform(curl);
38         curl_easy_cleanup(curl);
39       }
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AVAILABILITY

42       This  option  requires  that  libcurl was built with a resolver backend
43       that supports this operation. The c-ares backend is the only such one.
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45       Added in 7.24.0
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RETURN VALUE

48       Returns CURLE_OK if the option is  supported,  CURLE_UNKNOWN_OPTION  if
49       not,  CURLE_NOT_BUILT_IN  if  support  was  disabled  at  compile-time,
50       CURLE_BAD_FUNCTION_ARGUMENT when  given  an  invalid  server  list,  or
51       CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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