CURLOPT_ADDRESS_SCOPE(3) Introduction to Library Functions

NAME

CURLOPT_ADDRESS_SCOPE - scope id for IPv6 addresses

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ADDRESS_SCOPE, long scope);

DESCRIPTION

Pass a long specifying the scope id value to use when connecting to
IPv6 addresses.

DEFAULT

0

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

#include <net/if.h> /* for if_nametoindex() */

int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode ret;
long my_scope_id;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
my_scope_id = if_nametoindex("eth0");
curl_easy_setopt(curl, CURLOPT_ADDRESS_SCOPE, my_scope_id);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}

AVAILABILITY

Added in curl 7.19.0

RETURN VALUE

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error
occurred, see libcurl-errors(3). Returns CURLE_BAD_FUNCTION_ARGUMENT
if set to a negative value.

SEE ALSO

CURLOPT_DEBUGFUNCTION(3), CURLOPT_STDERR(3)

libcurl 2025-02-25 CURLOPT_ADDRESS_SCOPE(3)