Function sa6_checkzone_ifp

freebsd/netinet6/scope6.c:582–597

* This function is similar to sa6_checkzone, but it uses given ifp * to initialize sin6_scope_id. */

 * to initialize sin6_scope_id.
 */
int
sa6_checkzone_ifp(struct ifnet *ifp, struct sockaddr_in6 *sa6)
{
	int scope;

	scope = in6_addrscope(&sa6->sin6_addr);
	if (scope == IPV6_ADDR_SCOPE_LINKLOCAL ||
	    scope == IPV6_ADDR_SCOPE_INTFACELOCAL) {
		if (sa6->sin6_scope_id == 0) {
			sa6->sin6_scope_id = in6_getscopezone(ifp, scope);
			return (0);
		} else if (sa6->sin6_scope_id != in6_getscopezone(ifp, scope))
			return (EADDRNOTAVAIL);
	}
	return (sa6_checkzone(sa6));
}