CURLOPT_DNS_INTERFACE(3) Library Functions Manual 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 pointer 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
This functionality affects all supported protocols
EXAMPLE
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_INTERFACE, "eth0");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
NOTES
This option requires that libcurl was built with a resolver backend
that supports this operation. The c-ares backend is the only such one.
AVAILABILITY
Added in curl 7.33.0
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.
SEE ALSO
CURLOPT_DNS_LOCAL_IP4(3), CURLOPT_DNS_LOCAL_IP6(3),
CURLOPT_DNS_SERVERS(3), CURLOPT_INTERFACE(3)
libcurl 2024-08-05 CURLOPT_DNS_INTERFACE(3)
curl 8.9.1 - Generated Mon Aug 12 08:40:28 CDT 2024