Function FindUdpTcpOut

freebsd/netinet/libalias/alias_db.c:1502–1537

}

struct alias_link *
FindUdpTcpOut(struct libalias *la, struct in_addr src_addr,
    struct in_addr dst_addr,
    u_short src_port,
    u_short dst_port,
    u_char proto,
    int create)
{
	int link_type;
	struct alias_link *lnk;

	LIBALIAS_LOCK_ASSERT(la);
	switch (proto) {
	case IPPROTO_UDP:
		link_type = LINK_UDP;
		break;
	case IPPROTO_TCP:
		link_type = LINK_TCP;
		break;
	default:
		return (NULL);
		break;
	}

	lnk = FindLinkOut(la, src_addr, dst_addr, src_port, dst_port, link_type, create);

	if (lnk == NULL && create) {
		struct in_addr alias_addr;

		alias_addr = FindAliasAddress(la, src_addr);
		lnk = AddLink(la, src_addr, dst_addr, alias_addr,
		    src_port, dst_port, GET_ALIAS_PORT,
		    link_type);
	}
	return (lnk);
}

struct alias_link *
AddPptp(struct libalias *la, struct in_addr src_addr,