Man page - curlopt_address_scope(3)

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Manual

CURLOPT_ADDRESS_SCOPE

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
EXAMPLE
AVAILABILITY
RETURN VALUE
SEE ALSO

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

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.