CURLOPT_DNS_SERVERS(3) on macos

Usage

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

Overview

Pass a char pointer 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

Examples

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
    curl_easy_setopt(curl, CURLOPT_DNS_SERVERS,
                     "192.168.1.100:53,192.168.1.101");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

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.

History

macOS 26.5 to macOS 14.5: the text shown here
macOS 14.4 to macOS 14.2
macOS 14.1 to macOS 13.5
macOS 13.4
macOS 13.3
macOS 13.2
macOS 13.1
macOS 13.0
macOS 12.5 to macOS 12.3
macOS 12.2 to macOS 12.0.1
macOS 11.5 to macOS 10.15
macOS 10.14.6 to macOS 10.12.6
macOS 10.12.5 to macOS 10.12
OS X 10.11.6 to OS X 10.10