CURLOPT_DNS_LOCAL_IP4
Section: curl_easy_setopt options (3)
Updated: November 04, 2020
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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 (don't bind
to a specific IP address).
The application does not have to keep the string around after setting this
option.
DEFAULT
NULL
PROTOCOLS
All
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_DNS_LOCAL_IP4, "192.168.0.14");
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 7.33.0
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),