Function sctp_addr_match

freebsd/netinet/sctp_asconf.c:886–933

* does the address match? returns 0 if not, 1 if so */

 * does the address match? returns 0 if not, 1 if so
 */
static uint32_t
sctp_addr_match(struct sctp_paramhdr *ph, struct sockaddr *sa)
{
#if defined(INET) || defined(INET6)
	uint16_t param_type, param_length;

	param_type = ntohs(ph->param_type);
	param_length = ntohs(ph->param_length);
#endif
	switch (sa->sa_family) {
#ifdef INET6
	case AF_INET6:
		{
			/* XXX scopeid */
			struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
			struct sctp_ipv6addr_param *v6addr;

			v6addr = (struct sctp_ipv6addr_param *)ph;
			if ((param_type == SCTP_IPV6_ADDRESS) &&
			    (param_length == sizeof(struct sctp_ipv6addr_param)) &&
			    (memcmp(&v6addr->addr, &sin6->sin6_addr,
			    sizeof(struct in6_addr)) == 0)) {
				return (1);
			}
			break;
		}
#endif
#ifdef INET
	case AF_INET:
		{
			struct sockaddr_in *sin = (struct sockaddr_in *)sa;
			struct sctp_ipv4addr_param *v4addr;

			v4addr = (struct sctp_ipv4addr_param *)ph;
			if ((param_type == SCTP_IPV4_ADDRESS) &&
			    (param_length == sizeof(struct sctp_ipv4addr_param)) &&
			    (memcmp(&v4addr->addr, &sin->sin_addr,
			    sizeof(struct in_addr)) == 0)) {
				return (1);
			}
			break;
		}
#endif
	default:
		break;
	}
	return (0);
}

/*
 * Cleanup for non-responded/OP ERR'd ASCONF