Differential D31890 Diff 94924 sys/netipsec/ipsec_input.c

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sys/netipsec/ipsec_input.c

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	int			int
	ipsec4_ctlinput(int code, struct sockaddr sa, void v)			ipsec4_ctlinput(int code, struct sockaddr sa, void v)
	{			{
	struct in_conninfo inc;			struct in_conninfo inc;
	struct secasvar *sav;			struct secasvar *sav;
	struct icmp *icp;			struct icmp *icp;
	struct ip *ip = v;			struct ip *ip = v;
	uint32_t pmtu, spi;			uint32_t pmtu, spi;
				uint8_t proto;

	if (code != PRC_MSGSIZE \|\| ip == NULL)			if (code != PRC_MSGSIZE \|\| ip == NULL)
	return (EINVAL);			return (EINVAL);
	if (sa->sa_family != AF_INET \|\|			if (sa->sa_family != AF_INET \|\|
	sa->sa_len != sizeof(struct sockaddr_in))			sa->sa_len != sizeof(struct sockaddr_in))
	return (EAFNOSUPPORT);			return (EAFNOSUPPORT);

	icp = __containerof(ip, struct icmp, icmp_ip);			icp = __containerof(ip, struct icmp, icmp_ip);
	pmtu = ntohs(icp->icmp_nextmtu);			pmtu = ntohs(icp->icmp_nextmtu);

	if (pmtu < V_ip4_ipsec_min_pmtu)			if (pmtu < V_ip4_ipsec_min_pmtu)
	return (EINVAL);			return (EINVAL);

				proto = ip->ip_p;
				if (proto != IPPROTO_ESP && proto != IPPROTO_AH &&
				proto != IPPROTO_IPCOMP)
				return (EINVAL);

	memcpy(&spi, (caddr_t)ip + (ip->ip_hl << 2), sizeof(spi));			memcpy(&spi, (caddr_t)ip + (ip->ip_hl << 2), sizeof(spi));
	sav = key_allocsa((union sockaddr_union *)sa, ip->ip_p, spi);			sav = key_allocsa((union sockaddr_union *)sa, proto, spi);
	if (sav == NULL)			if (sav == NULL)
	return (ENOENT);			return (ENOENT);

	key_freesav(&sav);			key_freesav(&sav);

	memset(&inc, 0, sizeof(inc));			memset(&inc, 0, sizeof(inc));
	inc.inc_faddr = satosin(sa)->sin_addr;			inc.inc_faddr = satosin(sa)->sin_addr;
	tcp_hc_updatemtu(&inc, pmtu);			tcp_hc_updatemtu(&inc, pmtu);
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