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CURLOPT_ADDRESS_SCOPE(3)   Library Functions Manual   CURLOPT_ADDRESS_SCOPE(3)

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				  2025-06-03	      CURLOPT_ADDRESS_SCOPE(3)

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