CURLOPT_DNS_LOCAL_IP4(3) Library Functions Manual CURLOPT_DNS_LOCAL_IP4(3)
NAME
CURLOPT_DNS_LOCAL_IP4 - IPv4 address to bind DNS resolves to
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_LOCAL_IP4, char *address);
DESCRIPTION
Set the local IPv4 address that the resolver should bind to. The
argument should be of type char * and contain a single numerical IPv4
address as a string. Set this option to NULL to use the default setting
(do not bind to a specific IP address).
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_LOCAL_IP4, "192.168.0.14");
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, CURLE_NOT_BUILT_IN if support was disabled at compile-time, or
CURLE_BAD_FUNCTION_ARGUMENT when given a bad address.
SEE ALSO
CURLOPT_DNS_INTERFACE(3), CURLOPT_DNS_LOCAL_IP6(3),
CURLOPT_DNS_SERVERS(3)
libcurl 2024-08-05 CURLOPT_DNS_LOCAL_IP4(3)
curl 8.9.1 - Generated Mon Aug 5 18:37:27 CDT 2024