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CURLOPT_DNS_LOCAL_IP4(3) curl_easy_setopt options CURLOPT_DNS_LOCAL_IP4(3)
CURLOPT_DNS_LOCAL_IP4 - IPv4 address to bind DNS resolves to
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_LOCAL_IP4, char
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
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_DNS_LOCAL_IP4, "192.168.0.14");
ret = curl_easy_perform(curl);
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
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.
libcurl 7.68.0 December 10, 2017 CURLOPT_DNS_LOCAL_IP4(3)