Sync with recent KAME.

This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
  - The definitions of SADB_* in sys/net/pfkeyv2.h are still different
    from RFC2407/IANA assignment because of binary compatibility
    issue.  It should be fixed under 5-CURRENT.
  - ip6po_m member of struct ip6_pktopts is no longer used.  But, it
    is still there because of binary compatibility issue.  It should
    be removed under 5-CURRENT.

Reviewed by:	itojun
Obtained from:	KAME
MFC after:	3 weeks

22 files changed, 697 insertions, 459 deletions

diff --git a/sys/netinet/icmp6.h b/sys/netinet/icmp6.h
index 3625ee4..425495d 100644
--- a/sys/netinet/icmp6.h
+++ b/sys/netinet/icmp6.h
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: icmp6.h,v 1.18 2000/07/03 02:51:08 itojun Exp $	*/
+/*	$KAME: icmp6.h,v 1.46 2001/04/27 15:09:48 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -80,7 +80,7 @@ struct icmp6_hdr {
 		u_int16_t	icmp6_un_data16[2]; /* type-specific field */
 		u_int8_t	icmp6_un_data8[4];  /* type-specific field */
 	} icmp6_dataun;
-};
+} __attribute__((__packed__));
 
 #define icmp6_data32	icmp6_dataun.icmp6_un_data32
 #define icmp6_data16	icmp6_dataun.icmp6_un_data16
@@ -124,7 +124,10 @@ struct icmp6_hdr {
 #define MLD6_MTRACE_RESP		141	/* mtrace response(to sender) */
 #define MLD6_MTRACE			142	/* mtrace messages */
 
-#define ICMP6_MAXTYPE			142
+#define ICMP6_HADISCOV_REQUEST		143	/* XXX To be defined */
+#define ICMP6_HADISCOV_REPLY		144	/* XXX To be defined */
+  
+#define ICMP6_MAXTYPE			144
 
 #define ICMP6_DST_UNREACH_NOROUTE	0	/* no route to destination */
 #define ICMP6_DST_UNREACH_ADMIN	 	1	/* administratively prohibited */
@@ -146,7 +149,7 @@ struct icmp6_hdr {
 #define ICMP6_NI_SUBJ_FQDN	1	/* Query Subject is a Domain name */
 #define ICMP6_NI_SUBJ_IPV4	2	/* Query Subject is an IPv4 address */
 
-#define ICMP6_NI_SUCESS		0	/* node information successful reply */
+#define ICMP6_NI_SUCCESS	0	/* node information successful reply */
 #define ICMP6_NI_REFUSED	1	/* node information request is refused */
 #define ICMP6_NI_UNKNOWN	2	/* unknown Qtype */
 
@@ -164,7 +167,7 @@ struct icmp6_hdr {
 struct mld6_hdr {
 	struct icmp6_hdr	mld6_hdr;
 	struct in6_addr		mld6_addr; /* multicast address */
-};
+} __attribute__((__packed__));
 
 #define mld6_type	mld6_hdr.icmp6_type
 #define mld6_code	mld6_hdr.icmp6_code
@@ -179,7 +182,7 @@ struct mld6_hdr {
 struct nd_router_solicit {	/* router solicitation */
 	struct icmp6_hdr 	nd_rs_hdr;
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 #define nd_rs_type	nd_rs_hdr.icmp6_type
 #define nd_rs_code	nd_rs_hdr.icmp6_code
@@ -191,7 +194,7 @@ struct nd_router_advert {	/* router advertisement */
 	u_int32_t		nd_ra_reachable;	/* reachable time */
 	u_int32_t		nd_ra_retransmit;	/* retransmit timer */
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 #define nd_ra_type		nd_ra_hdr.icmp6_type
 #define nd_ra_code		nd_ra_hdr.icmp6_code
@@ -200,13 +203,26 @@ struct nd_router_advert {	/* router advertisement */
 #define nd_ra_flags_reserved	nd_ra_hdr.icmp6_data8[1]
 #define ND_RA_FLAG_MANAGED	0x80
 #define ND_RA_FLAG_OTHER	0x40
+#define ND_RA_FLAG_HA		0x20
+
+/*
+ * Router preference values based on draft-draves-ipngwg-router-selection-01.
+ * These are non-standard definitions.
+ */
+#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
+
+#define ND_RA_FLAG_RTPREF_HIGH	0x08 /* 00001000 */
+#define ND_RA_FLAG_RTPREF_MEDIUM	0x00 /* 00000000 */
+#define ND_RA_FLAG_RTPREF_LOW	0x18 /* 00011000 */
+#define ND_RA_FLAG_RTPREF_RSV	0x10 /* 00010000 */
+
 #define nd_ra_router_lifetime	nd_ra_hdr.icmp6_data16[1]
 
 struct nd_neighbor_solicit {	/* neighbor solicitation */
 	struct icmp6_hdr	nd_ns_hdr;
 	struct in6_addr		nd_ns_target;	/*target address */
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 #define nd_ns_type		nd_ns_hdr.icmp6_type
 #define nd_ns_code		nd_ns_hdr.icmp6_code
@@ -217,7 +233,7 @@ struct nd_neighbor_advert {	/* neighbor advertisement */
 	struct icmp6_hdr	nd_na_hdr;
 	struct in6_addr		nd_na_target;	/* target address */
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 #define nd_na_type		nd_na_hdr.icmp6_type
 #define nd_na_code		nd_na_hdr.icmp6_code
@@ -240,7 +256,7 @@ struct nd_redirect {		/* redirect */
 	struct in6_addr		nd_rd_target;	/* target address */
 	struct in6_addr		nd_rd_dst;	/* destination address */
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 #define nd_rd_type		nd_rd_hdr.icmp6_type
 #define nd_rd_code		nd_rd_hdr.icmp6_code
@@ -251,13 +267,14 @@ struct nd_opt_hdr {		/* Neighbor discovery option header */
 	u_int8_t	nd_opt_type;
 	u_int8_t	nd_opt_len;
 	/* followed by option specific data*/
-};
+} __attribute__((__packed__));
 
 #define ND_OPT_SOURCE_LINKADDR		1
 #define ND_OPT_TARGET_LINKADDR		2
 #define ND_OPT_PREFIX_INFORMATION	3
 #define ND_OPT_REDIRECTED_HEADER	4
 #define ND_OPT_MTU			5
+#define ND_OPT_ROUTE_INFO		9	/* draft-draves-router-preference, not officially assigned yet */
 
 struct nd_opt_prefix_info {	/* prefix information */
 	u_int8_t	nd_opt_pi_type;
@@ -268,7 +285,7 @@ struct nd_opt_prefix_info {	/* prefix information */
 	u_int32_t	nd_opt_pi_preferred_time;
 	u_int32_t	nd_opt_pi_reserved2;
 	struct in6_addr	nd_opt_pi_prefix;
-};
+} __attribute__((__packed__));
 
 #define ND_OPT_PI_FLAG_ONLINK		0x80
 #define ND_OPT_PI_FLAG_AUTO		0x40
@@ -279,15 +296,23 @@ struct nd_opt_rd_hdr {		/* redirected header */
 	u_int16_t	nd_opt_rh_reserved1;
 	u_int32_t	nd_opt_rh_reserved2;
 	/* followed by IP header and data */
-};
+} __attribute__((__packed__));
 
 struct nd_opt_mtu {		/* MTU option */
 	u_int8_t	nd_opt_mtu_type;
 	u_int8_t	nd_opt_mtu_len;
 	u_int16_t	nd_opt_mtu_reserved;
 	u_int32_t	nd_opt_mtu_mtu;
-};
-
+} __attribute__((__packed__));
+
+struct nd_opt_route_info {	/* route info */
+	u_int8_t	nd_opt_rti_type;
+	u_int8_t	nd_opt_rti_len;
+	u_int8_t	nd_opt_rti_prefixlen;
+	u_int8_t	nd_opt_rti_flags;
+	u_int32_t	nd_opt_rti_lifetime;
+	/* followed by prefix */
+} __attribute__((__packed__));
 /*
  * icmp6 namelookup
  */
@@ -301,7 +326,7 @@ struct icmp6_namelookup {
 	u_int8_t	icmp6_nl_name[3];
 #endif
 	/* could be followed by options */
-};
+} __attribute__((__packed__));
 
 /*
  * icmp6 node information
@@ -310,7 +335,7 @@ struct icmp6_nodeinfo {
 	struct icmp6_hdr icmp6_ni_hdr;
 	u_int8_t icmp6_ni_nonce[8];
 	/* could be followed by reply data */
-};
+} __attribute__((__packed__));
 
 #define ni_type		icmp6_ni_hdr.icmp6_type
 #define ni_code		icmp6_ni_hdr.icmp6_code
@@ -320,8 +345,10 @@ struct icmp6_nodeinfo {
 
 #define NI_QTYPE_NOOP		0 /* NOOP  */
 #define NI_QTYPE_SUPTYPES	1 /* Supported Qtypes */
-#define NI_QTYPE_FQDN		2 /* FQDN */
-#define NI_QTYPE_NODEADDR	3 /* Node Addresses. XXX: spec says 2, but it may be a typo... */
+#define NI_QTYPE_FQDN		2 /* FQDN (draft 04) */
+#define NI_QTYPE_DNSNAME	2 /* DNS Name */
+#define NI_QTYPE_NODEADDR	3 /* Node Addresses */
+#define NI_QTYPE_IPV4ADDR	4 /* IPv4 Addresses */
 
 #if BYTE_ORDER == BIG_ENDIAN
 #define NI_SUPTYPE_FLAG_COMPRESS	0x1
@@ -371,7 +398,7 @@ struct ni_reply_fqdn {
 	u_int32_t ni_fqdn_ttl;	/* TTL */
 	u_int8_t ni_fqdn_namelen; /* length in octets of the FQDN */
 	u_int8_t ni_fqdn_name[3]; /* XXX: alignment */
-};
+} __attribute__((__packed__));
 
 /*
  * Router Renumbering. as router-renum-08.txt
@@ -382,13 +409,13 @@ struct icmp6_router_renum {	/* router renumbering header */
 	u_int8_t	rr_flags;
 	u_int16_t	rr_maxdelay;
 	u_int32_t	rr_reserved;
-};
-#define ICMP6_RR_FLAGS_SEGNUM		0x80
-#define ICMP6_RR_FLAGS_TEST		0x40
-#define ICMP6_RR_FLAGS_REQRESULT	0x20
-#define ICMP6_RR_FLAGS_FORCEAPPLY	0x10
-#define ICMP6_RR_FLAGS_SPECSITE		0x08
-#define ICMP6_RR_FLAGS_PREVDONE		0x04
+} __attribute__((__packed__));
+
+#define ICMP6_RR_FLAGS_TEST		0x80
+#define ICMP6_RR_FLAGS_REQRESULT	0x40
+#define ICMP6_RR_FLAGS_FORCEAPPLY	0x20
+#define ICMP6_RR_FLAGS_SPECSITE		0x10
+#define ICMP6_RR_FLAGS_PREVDONE		0x08
 
 #define rr_type		rr_hdr.icmp6_type
 #define rr_code		rr_hdr.icmp6_code
@@ -404,7 +431,7 @@ struct rr_pco_match {		/* match prefix part */
 	u_int8_t	rpm_maxlen;
 	u_int16_t	rpm_reserved;
 	struct	in6_addr	rpm_prefix;
-};
+} __attribute__((__packed__));
 
 #define RPM_PCO_ADD		1
 #define RPM_PCO_CHANGE		2
@@ -420,7 +447,7 @@ struct rr_pco_use {		/* use prefix part */
 	u_int32_t	rpu_pltime;
 	u_int32_t	rpu_flags;
 	struct	in6_addr rpu_prefix;
-};
+} __attribute__((__packed__));
 #define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK	0x80
 #define ICMP6_RR_PCOUSE_RAFLAGS_AUTO	0x40
 
@@ -438,13 +465,13 @@ struct rr_result {		/* router renumbering result message */
 	u_int8_t	rrr_matchedlen;
 	u_int32_t	rrr_ifid;
 	struct	in6_addr rrr_prefix;
-};
+} __attribute__((__packed__));
 #if BYTE_ORDER == BIG_ENDIAN
 #define ICMP6_RR_RESULT_FLAGS_OOB		0x0002
 #define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0001
 #elif BYTE_ORDER == LITTLE_ENDIAN
-#define ICMP6_RR_RESULT_FLAGS_OOB		0x02
-#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x01
+#define ICMP6_RR_RESULT_FLAGS_OOB		0x0200
+#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN		0x0100
 #endif
 
 /*
@@ -534,6 +561,13 @@ struct icmp6stat {
 #define icp6s_oparamprob_option icp6s_outerrhist.icp6errs_paramprob_option
 #define icp6s_oredirect icp6s_outerrhist.icp6errs_redirect
 #define icp6s_ounknown icp6s_outerrhist.icp6errs_unknown
+	u_quad_t icp6s_pmtuchg;		/* path MTU changes */
+	u_quad_t icp6s_nd_badopt;	/* bad ND options */
+	u_quad_t icp6s_badns;		/* bad neighbor solicitation */
+	u_quad_t icp6s_badna;		/* bad neighbor advertisement */
+	u_quad_t icp6s_badrs;		/* bad router advertisement */
+	u_quad_t icp6s_badra;		/* bad router advertisement */
+	u_quad_t icp6s_badredirect;	/* bad redirect message */
 };
 
 /*
@@ -542,7 +576,9 @@ struct icmp6stat {
 #define ICMPV6CTL_STATS		1
 #define ICMPV6CTL_REDIRACCEPT	2	/* accept/process redirects */
 #define ICMPV6CTL_REDIRTIMEOUT	3	/* redirect cache time */
+#if 0	/*obsoleted*/
 #define ICMPV6CTL_ERRRATELIMIT	5	/* ICMPv6 error rate limitation */
+#endif
 #define ICMPV6CTL_ND6_PRUNE	6
 #define ICMPV6CTL_ND6_DELAY	8
 #define ICMPV6CTL_ND6_UMAXTRIES	9
@@ -552,7 +588,12 @@ struct icmp6stat {
 #define ICMPV6CTL_NODEINFO	13
 #define ICMPV6CTL_ERRPPSLIMIT	14	/* ICMPv6 error pps limitation */
 #define ICMPV6CTL_ND6_MAXNUDHINT	15
-#define ICMPV6CTL_MAXID		16
+#define ICMPV6CTL_MTUDISC_HIWAT	16
+#define ICMPV6CTL_MTUDISC_LOWAT	17
+#define ICMPV6CTL_ND6_DEBUG	18
+#define ICMPV6CTL_ND6_DRLIST	19
+#define ICMPV6CTL_ND6_PRLIST	20
+#define ICMPV6CTL_MAXID		21
 
 #define ICMPV6CTL_NAMES { \
 	{ 0, 0 }, \
@@ -560,7 +601,7 @@ struct icmp6stat {
 	{ "rediraccept", CTLTYPE_INT }, \
 	{ "redirtimeout", CTLTYPE_INT }, \
 	{ 0, 0 }, \
-	{ "errratelimit", CTLTYPE_INT }, \
+	{ 0, 0 }, \
 	{ "nd6_prune", CTLTYPE_INT }, \
 	{ 0, 0 }, \
 	{ "nd6_delay", CTLTYPE_INT }, \
@@ -571,6 +612,11 @@ struct icmp6stat {
 	{ "nodeinfo", CTLTYPE_INT }, \
 	{ "errppslimit", CTLTYPE_INT }, \
 	{ "nd6_maxnudhint", CTLTYPE_INT }, \
+	{ "mtudisc_hiwat", CTLTYPE_INT }, \
+	{ "mtudisc_lowat", CTLTYPE_INT }, \
+	{ "nd6_debug", CTLTYPE_INT }, \
+	{ 0, 0 }, \
+	{ 0, 0 }, \
 }
 
 #define RTF_PROBEMTU	RTF_PROTO1
@@ -591,6 +637,9 @@ void	icmp6_prepare __P((struct mbuf *));
 void	icmp6_redirect_input __P((struct mbuf *, int));
 void	icmp6_redirect_output __P((struct mbuf *, struct rtentry *));
 
+struct	ip6ctlparam;
+void	icmp6_mtudisc_update __P((struct ip6ctlparam *, int));
+
 /* XXX: is this the right place for these macros? */
 #define icmp6_ifstat_inc(ifp, tag) \
 do {								\
diff --git a/sys/netinet/in.c b/sys/netinet/in.c
index 95abe3f..170a343 100644
--- a/sys/netinet/in.c
+++ b/sys/netinet/in.c
@@ -51,11 +51,6 @@
 
 #include <netinet/igmp_var.h>
 
-#include "gif.h"
-#if NGIF > 0
-#include <net/if_gif.h>
-#endif
-
 static MALLOC_DEFINE(M_IPMADDR, "in_multi", "internet multicast address");
 
 static int in_mask2len __P((struct in_addr *));
@@ -200,21 +195,6 @@ in_control(so, cmd, data, ifp, p)
 	int error, hostIsNew, maskIsNew, s;
 	u_long i;
 
-#if NGIF > 0
-        if (ifp && ifp->if_type == IFT_GIF) {
-                switch (cmd) {
-                case SIOCSIFPHYADDR:
-		case SIOCDIFPHYADDR:
-			if (p &&
-			    (error = suser(p)) != 0)
-        			return(error);
-                case SIOCGIFPSRCADDR:
-                case SIOCGIFPDSTADDR:
-                        return gif_ioctl(ifp, cmd, data);
-                }
-        }
-#endif
-
 	switch (cmd) {
 	case SIOCALIFADDR:
 	case SIOCDLIFADDR:
@@ -713,6 +693,9 @@ in_ifinit(ifp, ia, sin, scrub)
 	}
 	if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0)
 		ia->ia_flags |= IFA_ROUTE;
+	/* XXX check if the subnet route points to the same interface */
+	if (error == EEXIST)
+		error = 0;
 
 	/*
 	 * If the interface supports multicast, join the "all hosts"
diff --git a/sys/netinet/in_gif.c b/sys/netinet/in_gif.c
index 17955ad..5ad92e1 100644
--- a/sys/netinet/in_gif.c
+++ b/sys/netinet/in_gif.c
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: in_gif.c,v 1.44 2000/08/15 07:24:24 itojun Exp $	*/
+/*	$KAME: in_gif.c,v 1.54 2001/05/14 14:02:16 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -88,7 +88,7 @@ in_gif_output(ifp, family, m, rt)
 	struct mbuf	*m;
 	struct rtentry *rt;
 {
-	register struct gif_softc *sc = (struct gif_softc*)ifp;
+	struct gif_softc *sc = (struct gif_softc*)ifp;
 	struct sockaddr_in *dst = (struct sockaddr_in *)&sc->gif_ro.ro_dst;
 	struct sockaddr_in *sin_src = (struct sockaddr_in *)sc->gif_psrc;
 	struct sockaddr_in *sin_dst = (struct sockaddr_in *)sc->gif_pdst;
@@ -146,29 +146,12 @@ in_gif_output(ifp, family, m, rt)
 
 	bzero(&iphdr, sizeof(iphdr));
 	iphdr.ip_src = sin_src->sin_addr;
-	if (ifp->if_flags & IFF_LINK0) {
-		/* multi-destination mode */
-		if (sin_dst->sin_addr.s_addr != INADDR_ANY)
-			iphdr.ip_dst = sin_dst->sin_addr;
-		else if (rt) {
-			if (family != AF_INET) {
-				m_freem(m);
-				return EINVAL;	/*XXX*/
-			}
-			iphdr.ip_dst = ((struct sockaddr_in *)
-					(rt->rt_gateway))->sin_addr;
-		} else {
-			m_freem(m);
-			return ENETUNREACH;
-		}
-	} else {
-		/* bidirectional configured tunnel mode */
-		if (sin_dst->sin_addr.s_addr != INADDR_ANY)
-			iphdr.ip_dst = sin_dst->sin_addr;
-		else {
-			m_freem(m);
-			return ENETUNREACH;
-		}
+	/* bidirectional configured tunnel mode */
+	if (sin_dst->sin_addr.s_addr != INADDR_ANY)
+		iphdr.ip_dst = sin_dst->sin_addr;
+	else {
+		m_freem(m);
+		return ENETUNREACH;
 	}
 	iphdr.ip_p = proto;
 	/* version will be set in ip_output() */
@@ -176,6 +159,8 @@ in_gif_output(ifp, family, m, rt)
 	iphdr.ip_len = m->m_pkthdr.len + sizeof(struct ip);
 	if (ifp->if_flags & IFF_LINK1)
 		ip_ecn_ingress(ECN_ALLOWED, &iphdr.ip_tos, &tos);
+	else
+		ip_ecn_ingress(ECN_NOCARE, &iphdr.ip_tos, &tos);
 
 	/* prepend new IP header */
 	M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
@@ -272,6 +257,8 @@ in_gif_input(m, va_alist)
 		ip = mtod(m, struct ip *);
 		if (gifp->if_flags & IFF_LINK1)
 			ip_ecn_egress(ECN_ALLOWED, &otos, &ip->ip_tos);
+		else
+			ip_ecn_egress(ECN_NOCARE, &otos, &ip->ip_tos);
 		break;
 	    }
 #endif
@@ -290,6 +277,8 @@ in_gif_input(m, va_alist)
 		itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
 		if (gifp->if_flags & IFF_LINK1)
 			ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
+		else
+			ip_ecn_egress(ECN_NOCARE, &otos, &itos);
 		ip6->ip6_flow &= ~htonl(0xff << 20);
 		ip6->ip6_flow |= htonl((u_int32_t)itos << 20);
 		break;
@@ -335,10 +324,6 @@ gif_encapcheck4(m, off, proto, arg)
 		addrmatch |= 1;
 	if (dst->sin_addr.s_addr == ip.ip_src.s_addr)
 		addrmatch |= 2;
-	else if ((sc->gif_if.if_flags & IFF_LINK0) != 0 &&
-		 dst->sin_addr.s_addr == INADDR_ANY) {
-		addrmatch |= 2; /* we accept any source */
-	}
 	if (addrmatch != 3)
 		return 0;
 
@@ -359,7 +344,8 @@ gif_encapcheck4(m, off, proto, arg)
 	}
 
 	/* ingress filters on outer source */
-	if ((m->m_flags & M_PKTHDR) != 0 && m->m_pkthdr.rcvif) {
+	if ((sc->gif_if.if_flags & IFF_LINK2) == 0 &&
+	    (m->m_flags & M_PKTHDR) != 0 && m->m_pkthdr.rcvif) {
 		struct sockaddr_in sin;
 		struct rtentry *rt;
 
@@ -368,15 +354,18 @@ gif_encapcheck4(m, off, proto, arg)
 		sin.sin_len = sizeof(struct sockaddr_in);
 		sin.sin_addr = ip.ip_src;
 		rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
-		if (!rt)
-			return 0;
-		if (rt->rt_ifp != m->m_pkthdr.rcvif) {
-			rtfree(rt);
+		if (!rt || rt->rt_ifp != m->m_pkthdr.rcvif) {
+#if 0
+			log(LOG_WARNING, "%s: packet from 0x%x dropped "
+			    "due to ingress filter\n", if_name(&sc->gif_if),
+			    (u_int32_t)ntohl(sin.sin_addr.s_addr));
+#endif
+			if (rt)
+				rtfree(rt);
 			return 0;
 		}
 		rtfree(rt);
 	}
 
-	/* prioritize: IFF_LINK0 mode is less preferred */
-	return (sc->gif_if.if_flags & IFF_LINK0) ? 32 : 32 * 2;
+	return 32 * 2;
 }
diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c
index b24b404..ba5f77f 100644
--- a/sys/netinet/in_pcb.c
+++ b/sys/netinet/in_pcb.c
@@ -151,14 +151,16 @@ in_pcballoc(so, pcbinfo, p)
 	inp->inp_pcbinfo = pcbinfo;
 	inp->inp_socket = so;
 #if defined(INET6)
-	if (ip6_mapped_addr_on)
-		inp->inp_flags &= ~IN6P_BINDV6ONLY;
-	else
-		inp->inp_flags |= IN6P_BINDV6ONLY;
+	if (INP_SOCKAF(so) == AF_INET6 && !ip6_mapped_addr_on)
+		inp->inp_flags |= IN6P_IPV6_V6ONLY;
 #endif
 	LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list);
 	pcbinfo->ipi_count++;
 	so->so_pcb = (caddr_t)inp;
+#ifdef INET6
+	if (ip6_auto_flowlabel)
+		inp->inp_flags |= IN6P_AUTOFLOWLABEL;
+#endif
 	return (0);
 }
 
@@ -234,9 +236,7 @@ in_pcbbind(inp, nam, p)
 				    (so->so_cred->cr_uid !=
 				     t->inp_socket->so_cred->cr_uid)) {
 #if defined(INET6)
-					if ((inp->inp_flags &
-					     IN6P_BINDV6ONLY) != 0 ||
-					    ntohl(sin->sin_addr.s_addr) !=
+					if (ntohl(sin->sin_addr.s_addr) !=
 					    INADDR_ANY ||
 					    ntohl(t->inp_laddr.s_addr) !=
 					    INADDR_ANY ||
@@ -254,8 +254,7 @@ in_pcbbind(inp, nam, p)
 			if (t &&
 			    (reuseport & t->inp_socket->so_options) == 0) {
 #if defined(INET6)
-				if ((inp->inp_flags & IN6P_BINDV6ONLY) != 0 ||
-				    ntohl(sin->sin_addr.s_addr) !=
+				if (ntohl(sin->sin_addr.s_addr) !=
 				    INADDR_ANY ||
 				    ntohl(t->inp_laddr.s_addr) !=
 				    INADDR_ANY ||
diff --git a/sys/netinet/in_pcb.h b/sys/netinet/in_pcb.h
index f4abb4d..1ae93d2 100644
--- a/sys/netinet/in_pcb.h
+++ b/sys/netinet/in_pcb.h
@@ -226,25 +226,27 @@ struct inpcbinfo {		/* XXX documentation, prefixes */
 #define	INP_RECVIF		0x80	/* receive incoming interface */
 #define	INP_MTUDISC		0x100	/* user can do MTU discovery */
 #define	INP_FAITH		0x200	/* accept FAITH'ed connections */
-#define	IN6P_PKTINFO		0x010000
-#define	IN6P_HOPLIMIT		0x020000
-#define	IN6P_NEXTHOP		0x040000
-#define	IN6P_HOPOPTS		0x080000
-#define	IN6P_DSTOPTS		0x100000
-#define	IN6P_RTHDR		0x200000
-#define	IN6P_BINDV6ONLY		0x400000
+
+#define IN6P_IPV6_V6ONLY	0x008000 /* restrict AF_INET6 socket for v6 */
+
+#define	IN6P_PKTINFO		0x010000 /* receive IP6 dst and I/F */
+#define	IN6P_HOPLIMIT		0x020000 /* receive hoplimit */
+#define	IN6P_HOPOPTS		0x040000 /* receive hop-by-hop options */
+#define	IN6P_DSTOPTS		0x080000 /* receive dst options after rthdr */
+#define	IN6P_RTHDR		0x100000 /* receive routing header */
+#define	IN6P_RTHDRDSTOPTS	0x200000 /* receive dstoptions before rthdr */
+#define IN6P_AUTOFLOWLABEL	0x800000 /* attach flowlabel automatically */
+#define	IN6P_BINDV6ONLY		0x10000000 /* do not grab IPv4 traffic */
+
 #define	INP_CONTROLOPTS		(INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
 					INP_RECVIF|\
-				 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_NEXTHOP|\
-				 IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)
-
-#define	INP_UNMAPPABLEOPTS	(IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR)
+				 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
+				 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
+				 IN6P_AUTOFLOWLABEL)
+#define	INP_UNMAPPABLEOPTS	(IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
+				 IN6P_AUTOFLOWLABEL)
 
  /* for KAME src sync over BSD*'s */
-#define	IN6P_RECVOPTS		INP_RECVOPTS
-#define	IN6P_RECVRETOPTS	INP_RECVRETOPTS
-#define	IN6P_RECVDSTADDR	INP_RECVDSTADDR
-#define	IN6P_HDRINCL		INP_HDRINCL
 #define	IN6P_HIGHPORT		INP_HIGHPORT
 #define	IN6P_LOWPORT		INP_LOWPORT
 #define	IN6P_ANONPORT		INP_ANONPORT
diff --git a/sys/netinet/in_proto.c b/sys/netinet/in_proto.c
index 02e6313..4c07a04 100644
--- a/sys/netinet/in_proto.c
+++ b/sys/netinet/in_proto.c
@@ -75,6 +75,7 @@
 #ifdef IPSEC_ESP
 #include <netinet6/esp.h>
 #endif
+#include <netinet6/ipcomp.h>
 #endif /* IPSEC */
 
 #include "gif.h"
@@ -125,19 +126,19 @@ struct ipprotosw inetsw[] = {
   0,		0,		0,		0,
   &rip_usrreqs
 },
-{ SOCK_RAW,	&inetdomain,	IPPROTO_ICMP,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_ICMP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   icmp_input,	0,		0,		rip_ctloutput,
   0,
   0,		0,		0,		0,
   &rip_usrreqs
 },
-{ SOCK_RAW,	&inetdomain,	IPPROTO_IGMP,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IGMP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   igmp_input,	0,		0,		rip_ctloutput,
   0,
   igmp_init,	igmp_fasttimo,	igmp_slowtimo,	0,
   &rip_usrreqs
 },
-{ SOCK_RAW,	&inetdomain,	IPPROTO_RSVP,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_RSVP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   rsvp_input,	0,		0,		rip_ctloutput,
   0,
   0,		0,		0,		0,
@@ -158,19 +159,25 @@ struct ipprotosw inetsw[] = {
   &nousrreqs
 },
 #endif
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IPCOMP,	PR_ATOMIC|PR_ADDR,
+  ipcomp4_input, 0,	 	0,		0,
+  0,	  
+  0,		0,		0,		0,
+  &nousrreqs
+},
 #endif /* IPSEC */
-{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV4,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV4,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   encap4_input,	0,	 	0,		rip_ctloutput,
   0,
   encap_init,		0,		0,		0,
-  &nousrreqs
+  &rip_usrreqs
 },
 # ifdef INET6
-{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   encap4_input,	0,	 	0,		rip_ctloutput,
   0,
-  0,		0,		0,		0,
-  &nousrreqs
+  encap_init,	0,		0,		0,
+  &rip_usrreqs
 },
 #endif
 #ifdef IPDIVERT
@@ -182,7 +189,7 @@ struct ipprotosw inetsw[] = {
 },
 #endif
 #ifdef IPXIP
-{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   ipxip_input,	0,		ipxip_ctlinput,	0,
   0,
   0,		0,		0,		0,
@@ -190,7 +197,7 @@ struct ipprotosw inetsw[] = {
 },
 #endif
 #ifdef NSIP
-{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR,
+{ SOCK_RAW,	&inetdomain,	IPPROTO_IDP,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
   idpip_input,	0,		nsip_ctlinput,	0,
   0,
   0,		0,		0,		0,
diff --git a/sys/netinet/ip6.h b/sys/netinet/ip6.h
index 77d1ab6..ec2c216 100644
--- a/sys/netinet/ip6.h
+++ b/sys/netinet/ip6.h
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $	*/
+/*	$KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -85,7 +85,7 @@ struct ip6_hdr {
 	} ip6_ctlun;
 	struct in6_addr ip6_src;	/* source address */
 	struct in6_addr ip6_dst;	/* destination address */
-};
+} __attribute__((__packed__));
 
 #define ip6_vfc		ip6_ctlun.ip6_un2_vfc
 #define ip6_flow	ip6_ctlun.ip6_un1.ip6_un1_flow
@@ -106,18 +106,20 @@ struct ip6_hdr {
 #define IPV6_FLOWLABEL_MASK	0xffff0f00	/* flow label (20 bits) */
 #endif /* LITTLE_ENDIAN */
 #endif
+#if 1
 /* ECN bits proposed by Sally Floyd */
 #define IP6TOS_CE		0x01	/* congestion experienced */
 #define IP6TOS_ECT		0x02	/* ECN-capable transport */
+#endif
 
 /*
  * Extension Headers
  */
 
 struct	ip6_ext {
-	u_char	ip6e_nxt;
-	u_char	ip6e_len;
-};
+	u_int8_t ip6e_nxt;
+	u_int8_t ip6e_len;
+} __attribute__((__packed__));
 
 /* Hop-by-Hop options header */
 /* XXX should we pad it to force alignment on an 8-byte boundary? */
@@ -125,7 +127,7 @@ struct ip6_hbh {
 	u_int8_t ip6h_nxt;	/* next header */
 	u_int8_t ip6h_len;	/* length in units of 8 octets */
 	/* followed by options */
-};
+} __attribute__((__packed__));
 
 /* Destination options header */
 /* XXX should we pad it to force alignment on an 8-byte boundary? */
@@ -133,20 +135,28 @@ struct ip6_dest {
 	u_int8_t ip6d_nxt;	/* next header */
 	u_int8_t ip6d_len;	/* length in units of 8 octets */
 	/* followed by options */
-};
+} __attribute__((__packed__));
 
 /* Option types and related macros */
 #define IP6OPT_PAD1		0x00	/* 00 0 00000 */
 #define IP6OPT_PADN		0x01	/* 00 0 00001 */
 #define IP6OPT_JUMBO		0xC2	/* 11 0 00010 = 194 */
-#define IP6OPT_JUMBO_LEN	6
-#define IP6OPT_RTALERT		0x05	/* 00 0 00101 */
+#define IP6OPT_NSAP_ADDR	0xC3	/* 11 0 00011 */
+#define IP6OPT_TUNNEL_LIMIT	0x04	/* 00 0 00100 */
+#define IP6OPT_RTALERT		0x05	/* 00 0 00101 (KAME definition) */
+
 #define IP6OPT_RTALERT_LEN	4
 #define IP6OPT_RTALERT_MLD	0	/* Datagram contains an MLD message */
 #define IP6OPT_RTALERT_RSVP	1	/* Datagram contains an RSVP message */
 #define IP6OPT_RTALERT_ACTNET	2 	/* contains an Active Networks msg */
 #define IP6OPT_MINLEN		2
 
+#define IP6OPT_BINDING_UPDATE	0xc6	/* 11 0 00110 */
+#define IP6OPT_BINDING_ACK	0x07	/* 00 0 00111 */
+#define IP6OPT_BINDING_REQ	0x08	/* 00 0 01000 */
+#define IP6OPT_HOME_ADDRESS	0xc9	/* 11 0 01001 */
+#define IP6OPT_EID		0x8a	/* 10 0 01010 */
+
 #define IP6OPT_TYPE(o)		((o) & 0xC0)
 #define IP6OPT_TYPE_SKIP	0x00
 #define IP6OPT_TYPE_DISCARD	0x40
@@ -155,6 +165,8 @@ struct ip6_dest {
 
 #define IP6OPT_MUTABLE		0x20
 
+#define IP6OPT_JUMBO_LEN	6
+
 /* Routing header */
 struct ip6_rthdr {
 	u_int8_t  ip6r_nxt;	/* next header */
@@ -162,7 +174,7 @@ struct ip6_rthdr {
 	u_int8_t  ip6r_type;	/* routing type */
 	u_int8_t  ip6r_segleft;	/* segments left */
 	/* followed by routing type specific data */
-};
+} __attribute__((__packed__));
 
 /* Type 0 Routing header */
 struct ip6_rthdr0 {
@@ -173,7 +185,7 @@ struct ip6_rthdr0 {
 	u_int8_t  ip6r0_reserved;	/* reserved field */
 	u_int8_t  ip6r0_slmap[3];	/* strict/loose bit map */
 	struct in6_addr  ip6r0_addr[1];	/* up to 23 addresses */
-};
+} __attribute__((__packed__));
 
 /* Fragment header */
 struct ip6_frag {
@@ -181,7 +193,7 @@ struct ip6_frag {
 	u_int8_t  ip6f_reserved;	/* reserved field */
 	u_int16_t ip6f_offlg;		/* offset, reserved, and flag */
 	u_int32_t ip6f_ident;		/* identification */
-};
+} __attribute__((__packed__));
 
 #if BYTE_ORDER == BIG_ENDIAN
 #define IP6F_OFF_MASK		0xfff8	/* mask out offset from _offlg */
diff --git a/sys/netinet/ip_ecn.c b/sys/netinet/ip_ecn.c
index 047f82e..3abc3b6 100644
--- a/sys/netinet/ip_ecn.c
+++ b/sys/netinet/ip_ecn.c
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: ip_ecn.c,v 1.7 2000/05/05 11:00:56 sumikawa Exp $	*/
+/*	$KAME: ip_ecn.c,v 1.11 2001/05/03 16:09:29 itojun Exp $	*/
 
 /*
  * Copyright (C) 1999 WIDE Project.
@@ -43,16 +43,10 @@
 #include <sys/mbuf.h>
 #include <sys/errno.h>
 
-#ifdef INET
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
-#endif
-
 #ifdef INET6
-#ifndef INET
-#include <netinet/in.h>
-#endif
 #include <netinet/ip6.h>
 #endif
 
@@ -63,17 +57,17 @@
 
 /*
  * modify outer ECN (TOS) field on ingress operation (tunnel encapsulation).
- * call it after you've done the default initialization/copy for the outer.
  */
 void
 ip_ecn_ingress(mode, outer, inner)
 	int mode;
 	u_int8_t *outer;
-	u_int8_t *inner;
+	const u_int8_t *inner;
 {
 	if (!outer || !inner)
 		panic("NULL pointer passed to ip_ecn_ingress");
 
+	*outer = *inner;
 	switch (mode) {
 	case ECN_ALLOWED:		/* ECN allowed */
 		*outer &= ~IPTOS_CE;
@@ -88,12 +82,11 @@ ip_ecn_ingress(mode, outer, inner)
 
 /*
  * modify inner ECN (TOS) field on egress operation (tunnel decapsulation).
- * call it after you've done the default initialization/copy for the inner.
  */
 void
 ip_ecn_egress(mode, outer, inner)
 	int mode;
-	u_int8_t *outer;
+	const u_int8_t *outer;
 	u_int8_t *inner;
 {
 	if (!outer || !inner)
@@ -115,14 +108,13 @@ void
 ip6_ecn_ingress(mode, outer, inner)
 	int mode;
 	u_int32_t *outer;
-	u_int32_t *inner;
+	const u_int32_t *inner;
 {
 	u_int8_t outer8, inner8;
 
 	if (!outer || !inner)
 		panic("NULL pointer passed to ip6_ecn_ingress");
 
-	outer8 = (ntohl(*outer) >> 20) & 0xff;
 	inner8 = (ntohl(*inner) >> 20) & 0xff;
 	ip_ecn_ingress(mode, &outer8, &inner8);
 	*outer &= ~htonl(0xff << 20);
@@ -132,7 +124,7 @@ ip6_ecn_ingress(mode, outer, inner)
 void
 ip6_ecn_egress(mode, outer, inner)
 	int mode;
-	u_int32_t *outer;
+	const u_int32_t *outer;
 	u_int32_t *inner;
 {
 	u_int8_t outer8, inner8;
@@ -141,7 +133,6 @@ ip6_ecn_egress(mode, outer, inner)
 		panic("NULL pointer passed to ip6_ecn_egress");
 
 	outer8 = (ntohl(*outer) >> 20) & 0xff;
-	inner8 = (ntohl(*inner) >> 20) & 0xff;
 	ip_ecn_egress(mode, &outer8, &inner8);
 	*inner &= ~htonl(0xff << 20);
 	*inner |= htonl((u_int32_t)inner8 << 20);
diff --git a/sys/netinet/ip_ecn.h b/sys/netinet/ip_ecn.h
index 6445d0f..9aca731 100644
--- a/sys/netinet/ip_ecn.h
+++ b/sys/netinet/ip_ecn.h
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: ip_ecn.h,v 1.5 2000/03/27 04:58:38 sumikawa Exp $	*/
+/*	$KAME: ip_ecn.h,v 1.6 2001/05/03 14:51:48 itojun Exp $	*/
 
 /*
  * Copyright (C) 1999 WIDE Project.
@@ -35,11 +35,15 @@
  * http://www.aciri.org/floyd/papers/draft-ipsec-ecn-00.txt
  */
 
+#if defined(_KERNEL) && !defined(_LKM)
+#include "opt_inet.h"
+#endif
+
 #define ECN_ALLOWED	1	/* ECN allowed */
 #define ECN_FORBIDDEN	0	/* ECN forbidden */
 #define ECN_NOCARE	(-1)	/* no consideration to ECN */
 
 #ifdef _KERNEL
-extern void ip_ecn_ingress __P((int, u_int8_t *, u_int8_t *));
-extern void ip_ecn_egress __P((int, u_int8_t *, u_int8_t *));
+extern void ip_ecn_ingress __P((int, u_int8_t *, const u_int8_t *));
+extern void ip_ecn_egress __P((int, const u_int8_t *, u_int8_t *));
 #endif
diff --git a/sys/netinet/ip_encap.c b/sys/netinet/ip_encap.c
index 7d623ea..7463300 100644
--- a/sys/netinet/ip_encap.c
+++ b/sys/netinet/ip_encap.c
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*	$KAME: ip_encap.c,v 1.36 2000/06/17 20:34:24 itojun Exp $	*/
+/*	$KAME: ip_encap.c,v 1.41 2001/03/15 08:35:08 itojun Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -67,6 +67,7 @@
 #include <sys/mbuf.h>
 #include <sys/errno.h>
 #include <sys/protosw.h>
+#include <sys/queue.h>
 
 #include <net/if.h>
 #include <net/route.h>
@@ -100,12 +101,21 @@ static int mask_match __P((const struct encaptab *, const struct sockaddr *,
 		const struct sockaddr *));
 static void encap_fillarg __P((struct mbuf *, const struct encaptab *));
 
+#ifndef LIST_HEAD_INITIALIZER
 /* rely upon BSS initialization */
 LIST_HEAD(, encaptab) encaptab;
+#else
+LIST_HEAD(, encaptab) encaptab = LIST_HEAD_INITIALIZER(&encaptab);
+#endif
 
 void
 encap_init()
 {
+	static int initialized = 0;
+
+	if (initialized)
+		return;
+	initialized++;
 #if 0
 	/*
 	 * we cannot use LIST_INIT() here, since drivers may want to call
@@ -118,6 +128,7 @@ encap_init()
 #endif
 }
 
+#ifdef INET
 void
 #if __STDC__
 encap4_input(struct mbuf *m, ...)
@@ -221,6 +232,7 @@ encap4_input(m, va_alist)
 	/* last resort: inject to raw socket */
 	rip_input(m, off, proto);
 }
+#endif
 
 #ifdef INET6
 int
diff --git a/sys/netinet/ip_icmp.c b/sys/netinet/ip_icmp.c
index ddb95f0..7e8c722 100644
--- a/sys/netinet/ip_icmp.c
+++ b/sys/netinet/ip_icmp.c
@@ -296,15 +296,6 @@ icmp_input(m, off, proto)
 		    icp->icmp_code);
 #endif
 
-#ifdef IPSEC
-	/* drop it if it does not match the policy */
-	/* XXX Is there meaning of check in here ? */
-	if (ipsec4_in_reject(m, NULL)) {
-		ipsecstat.in_polvio++;
-		goto freeit;
-	}
-#endif
-
 	/*
 	 * Message type specific processing.
 	 */
diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c
index 7cd8568..3cf13cf 100644
--- a/sys/netinet/ip_input.c
+++ b/sys/netinet/ip_input.c
@@ -350,6 +350,16 @@ ip_input(struct mbuf *m)
 		}
 		ip = mtod(m, struct ip *);
 	}
+
+	/* 127/8 must not appear on wire - RFC1122 */
+	if ((ntohl(ip->ip_dst.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
+	    (ntohl(ip->ip_src.s_addr) >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) {
+		if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
+			ipstat.ips_badaddr++;
+			goto bad;
+		}
+	}
+
 	if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
 		sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
 	} else {
@@ -393,15 +403,10 @@ tooshort:
 			m_adj(m, ip->ip_len - m->m_pkthdr.len);
 	}
 
-	/*
-	 * Don't accept packets with a loopback destination address
-	 * unless they arrived via the loopback interface.
-	 */
-	if ((ntohl(ip->ip_dst.s_addr) & IN_CLASSA_NET) ==
-	    (IN_LOOPBACKNET << IN_CLASSA_NSHIFT) && 
-	    (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) {
-		goto bad;
-	}
+#ifdef IPSEC
+	if (ipsec_gethist(m, NULL))
+		goto pass;
+#endif
 
 	/*
 	 * IpHack's section.
@@ -796,6 +801,19 @@ found:
 	}
 #endif
 
+#ifdef IPSEC
+	/*
+	 * enforce IPsec policy checking if we are seeing last header.
+	 * note that we do not visit this with protocols with pcb layer
+	 * code - like udp/tcp/raw ip.
+	 */
+	if ((inetsw[ip_protox[ip->ip_p]].pr_flags & PR_LASTHDR) != 0 &&
+	    ipsec4_in_reject(m, NULL)) {
+		ipsecstat.in_polvio++;
+		goto bad;
+	}
+#endif
+
 	/*
 	 * Switch out to protocol's input routine.
 	 */
@@ -1189,6 +1207,10 @@ ip_dooptions(m)
 		 */
 		case IPOPT_LSRR:
 		case IPOPT_SSRR:
+			if (optlen < IPOPT_OFFSET + sizeof(*cp)) {
+				code = &cp[IPOPT_OLEN] - (u_char *)ip;
+				goto bad;
+			}
 			if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
 				code = &cp[IPOPT_OFFSET] - (u_char *)ip;
 				goto bad;
@@ -1308,12 +1330,21 @@ nosourcerouting:
 		case IPOPT_TS:
 			code = cp - (u_char *)ip;
 			ipt = (struct ip_timestamp *)cp;
-			if (ipt->ipt_len < 5)
+			if (ipt->ipt_len < 4 || ipt->ipt_len > 40) {
+				code = (u_char *)&ipt->ipt_len - (u_char *)ip;
 				goto bad;
+			}
+			if (ipt->ipt_ptr < 5) {
+				code = (u_char *)&ipt->ipt_ptr - (u_char *)ip;
+				goto bad;
+			}
 			if (ipt->ipt_ptr >
 			    ipt->ipt_len - (int)sizeof(int32_t)) {
-				if (++ipt->ipt_oflw == 0)
+				if (++ipt->ipt_oflw == 0) {
+					code = (u_char *)&ipt->ipt_ptr -
+					    (u_char *)ip;
 					goto bad;
+				}
 				break;
 			}
 			sin = (struct in_addr *)(cp + ipt->ipt_ptr - 1);
@@ -1324,8 +1355,11 @@ nosourcerouting:
 
 			case IPOPT_TS_TSANDADDR:
 				if (ipt->ipt_ptr - 1 + sizeof(n_time) +
-				    sizeof(struct in_addr) > ipt->ipt_len)
+				    sizeof(struct in_addr) > ipt->ipt_len) {
+					code = (u_char *)&ipt->ipt_ptr -
+					    (u_char *)ip;
 					goto bad;
+				}
 				ipaddr.sin_addr = dst;
 				ia = (INA)ifaof_ifpforaddr((SA)&ipaddr,
 							    m->m_pkthdr.rcvif);
@@ -1338,8 +1372,11 @@ nosourcerouting:
 
 			case IPOPT_TS_PRESPEC:
 				if (ipt->ipt_ptr - 1 + sizeof(n_time) +
-				    sizeof(struct in_addr) > ipt->ipt_len)
+				    sizeof(struct in_addr) > ipt->ipt_len) {
+					code = (u_char *)&ipt->ipt_ptr -
+					    (u_char *)ip;
 					goto bad;
+				}
 				(void)memcpy(&ipaddr.sin_addr, sin,
 				    sizeof(struct in_addr));
 				if (ifa_ifwithaddr((SA)&ipaddr) == 0)
@@ -1348,6 +1385,9 @@ nosourcerouting:
 				break;
 
 			default:
+				/* XXX can't take &ipt->ipt_flg */
+				code = (u_char *)&ipt->ipt_ptr -
+				    (u_char *)ip + 1;
 				goto bad;
 			}
 			ntime = iptime();
diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c
index 1025e37..10de694 100644
--- a/sys/netinet/ip_output.c
+++ b/sys/netinet/ip_output.c
@@ -95,6 +95,7 @@ static MALLOC_DEFINE(M_IPMOPTS, "ip_moptions", "internet multicast options");
 u_short ip_id;
 
 static struct mbuf *ip_insertoptions __P((struct mbuf *, struct mbuf *, int *));
+static struct ifnet *ip_multicast_if __P((struct in_addr *, int *));
 static void	ip_mloopback
 	__P((struct ifnet *, struct mbuf *, struct sockaddr_in *, int));
 static int	ip_getmoptions
@@ -177,7 +178,7 @@ ip_output(m0, opt, ro, flags, imo)
             m0 = m = m->m_next ;
 #ifdef IPSEC
 	    so = ipsec_getsocket(m);
-	    ipsec_setsocket(m, NULL);
+	    (void)ipsec_setsocket(m, NULL);
 #endif
             ip = mtod(m, struct ip *);
             hlen = IP_VHL_HL(ip->ip_vhl) << 2 ;
@@ -188,7 +189,7 @@ ip_output(m0, opt, ro, flags, imo)
 #endif
 #ifdef IPSEC
 	so = ipsec_getsocket(m);
-	ipsec_setsocket(m, NULL);
+	(void)ipsec_setsocket(m, NULL);
 #endif
 
 #ifdef	DIAGNOSTIC
@@ -430,6 +431,133 @@ ip_output(m0, opt, ro, flags, imo)
 	}
 
 sendit:
+#ifdef IPSEC
+	/* get SP for this packet */
+	if (so == NULL)
+		sp = ipsec4_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, flags, &error);
+	else
+		sp = ipsec4_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
+
+	if (sp == NULL) {
+		ipsecstat.out_inval++;
+		goto bad;
+	}
+
+	error = 0;
+
+	/* check policy */
+	switch (sp->policy) {
+	case IPSEC_POLICY_DISCARD:
+		/*
+		 * This packet is just discarded.
+		 */
+		ipsecstat.out_polvio++;
+		goto bad;
+
+	case IPSEC_POLICY_BYPASS:
+	case IPSEC_POLICY_NONE:
+		/* no need to do IPsec. */
+		goto skip_ipsec;
+	
+	case IPSEC_POLICY_IPSEC:
+		if (sp->req == NULL) {
+			/* acquire a policy */
+			error = key_spdacquire(sp);
+			goto bad;
+		}
+		break;
+
+	case IPSEC_POLICY_ENTRUST:
+	default:
+		printf("ip_output: Invalid policy found. %d\n", sp->policy);
+	}
+    {
+	struct ipsec_output_state state;
+	bzero(&state, sizeof(state));
+	state.m = m;
+	if (flags & IP_ROUTETOIF) {
+		state.ro = &iproute;
+		bzero(&iproute, sizeof(iproute));
+	} else
+		state.ro = ro;
+	state.dst = (struct sockaddr *)dst;
+
+	ip->ip_sum = 0;
+
+	/*
+	 * XXX
+	 * delayed checksums are not currently compatible with IPsec
+	 */
+	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
+		in_delayed_cksum(m);
+		m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
+	}
+
+	HTONS(ip->ip_len);
+	HTONS(ip->ip_off);
+
+	error = ipsec4_output(&state, sp, flags);
+
+	m = state.m;
+	if (flags & IP_ROUTETOIF) {
+		/*
+		 * if we have tunnel mode SA, we may need to ignore
+		 * IP_ROUTETOIF.
+		 */
+		if (state.ro != &iproute || state.ro->ro_rt != NULL) {
+			flags &= ~IP_ROUTETOIF;
+			ro = state.ro;
+		}
+	} else
+		ro = state.ro;
+	dst = (struct sockaddr_in *)state.dst;
+	if (error) {
+		/* mbuf is already reclaimed in ipsec4_output. */
+		m0 = NULL;
+		switch (error) {
+		case EHOSTUNREACH:
+		case ENETUNREACH:
+		case EMSGSIZE:
+		case ENOBUFS:
+		case ENOMEM:
+			break;
+		default:
+			printf("ip4_output (ipsec): error code %d\n", error);
+			/*fall through*/
+		case ENOENT:
+			/* don't show these error codes to the user */
+			error = 0;
+			break;
+		}
+		goto bad;
+	}
+    }
+
+	/* be sure to update variables that are affected by ipsec4_output() */
+	ip = mtod(m, struct ip *);
+#ifdef _IP_VHL
+	hlen = IP_VHL_HL(ip->ip_vhl) << 2;
+#else
+	hlen = ip->ip_hl << 2;
+#endif
+	if (ro->ro_rt == NULL) {
+		if ((flags & IP_ROUTETOIF) == 0) {
+			printf("ip_output: "
+				"can't update route after IPsec processing\n");
+			error = EHOSTUNREACH;	/*XXX*/
+			goto bad;
+		}
+	} else {
+		ia = ifatoia(ro->ro_rt->rt_ifa);
+		ifp = ro->ro_rt->rt_ifp;
+	}
+
+	/* make it flipped, again. */
+	NTOHS(ip->ip_len);
+	NTOHS(ip->ip_off);
+skip_ipsec:
+#endif /*IPSEC*/
+
 	/*
 	 * IpHack's section.
 	 * - Xlate: translate packet's addr/port (NAT).
@@ -661,134 +789,6 @@ sendit:
 	}
 
 pass:
-#ifdef IPSEC
-	/* get SP for this packet */
-	if (so == NULL)
-		sp = ipsec4_getpolicybyaddr(m, IPSEC_DIR_OUTBOUND, flags, &error);
-	else
-		sp = ipsec4_getpolicybysock(m, IPSEC_DIR_OUTBOUND, so, &error);
-
-	if (sp == NULL) {
-		ipsecstat.out_inval++;
-		goto bad;
-	}
-
-	error = 0;
-
-	/* check policy */
-	switch (sp->policy) {
-	case IPSEC_POLICY_DISCARD:
-		/*
-		 * This packet is just discarded.
-		 */
-		ipsecstat.out_polvio++;
-		goto bad;
-
-	case IPSEC_POLICY_BYPASS:
-	case IPSEC_POLICY_NONE:
-		/* no need to do IPsec. */
-		goto skip_ipsec;
-	
-	case IPSEC_POLICY_IPSEC:
-		if (sp->req == NULL) {
-			/* XXX should be panic ? */
-			printf("ip_output: No IPsec request specified.\n");
-			error = EINVAL;
-			goto bad;
-		}
-		break;
-
-	case IPSEC_POLICY_ENTRUST:
-	default:
-		printf("ip_output: Invalid policy found. %d\n", sp->policy);
-	}
-    {
-	struct ipsec_output_state state;
-	bzero(&state, sizeof(state));
-	state.m = m;
-	if (flags & IP_ROUTETOIF) {
-		state.ro = &iproute;
-		bzero(&iproute, sizeof(iproute));
-	} else
-		state.ro = ro;
-	state.dst = (struct sockaddr *)dst;
-
-	ip->ip_sum = 0;
-
-	/*
-	 * XXX
-	 * delayed checksums are not currently compatible with IPsec
-	 */
-	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
-		in_delayed_cksum(m);
-		m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
-	}
-
-	HTONS(ip->ip_len);
-	HTONS(ip->ip_off);
-
-	error = ipsec4_output(&state, sp, flags);
-
-	m = state.m;
-	if (flags & IP_ROUTETOIF) {
-		/*
-		 * if we have tunnel mode SA, we may need to ignore
-		 * IP_ROUTETOIF.
-		 */
-		if (state.ro != &iproute || state.ro->ro_rt != NULL) {
-			flags &= ~IP_ROUTETOIF;
-			ro = state.ro;
-		}
-	} else
-		ro = state.ro;
-	dst = (struct sockaddr_in *)state.dst;
-	if (error) {
-		/* mbuf is already reclaimed in ipsec4_output. */
-		m0 = NULL;
-		switch (error) {
-		case EHOSTUNREACH:
-		case ENETUNREACH:
-		case EMSGSIZE:
-		case ENOBUFS:
-		case ENOMEM:
-			break;
-		default:
-			printf("ip4_output (ipsec): error code %d\n", error);
-			/*fall through*/
-		case ENOENT:
-			/* don't show these error codes to the user */
-			error = 0;
-			break;
-		}
-		goto bad;
-	}
-    }
-
-	/* be sure to update variables that are affected by ipsec4_output() */
-	ip = mtod(m, struct ip *);
-#ifdef _IP_VHL
-	hlen = IP_VHL_HL(ip->ip_vhl) << 2;
-#else
-	hlen = ip->ip_hl << 2;
-#endif
-	if (ro->ro_rt == NULL) {
-		if ((flags & IP_ROUTETOIF) == 0) {
-			printf("ip_output: "
-				"can't update route after IPsec processing\n");
-			error = EHOSTUNREACH;	/*XXX*/
-			goto bad;
-		}
-	} else {
-		ia = ifatoia(ro->ro_rt->rt_ifa);
-		ifp = ro->ro_rt->rt_ifp;
-	}
-
-	/* make it flipped, again. */
-	NTOHS(ip->ip_len);
-	NTOHS(ip->ip_off);
-skip_ipsec:
-#endif /*IPSEC*/
-
 	m->m_pkthdr.csum_flags |= CSUM_IP;
 	sw_csum = m->m_pkthdr.csum_flags & ~ifp->if_hwassist;
 	if (sw_csum & CSUM_DELAY_DATA) {
@@ -820,6 +820,11 @@ skip_ipsec:
 			ia->ia_ifa.if_obytes += m->m_pkthdr.len;
 		}
 
+#ifdef IPSEC
+		/* clean ipsec history once it goes out of the node */
+		ipsec_delaux(m);
+#endif
+
 		error = (*ifp->if_output)(ifp, m,
 				(struct sockaddr *)dst, ro->ro_rt);
 		goto done;
@@ -946,6 +951,10 @@ sendorfree:
 	for (m = m0; m; m = m0) {
 		m0 = m->m_nextpkt;
 		m->m_nextpkt = 0;
+#ifdef IPSEC
+		/* clean ipsec history once it goes out of the node */
+		ipsec_delaux(m);
+#endif
 		if (error == 0) {
 			/* Record statistics for this interface address. */
 			ia->ia_ifa.if_opackets++;
@@ -1480,6 +1489,33 @@ bad:
  * transmission, and one (IP_MULTICAST_TTL) totally duplicates a
  * standard option (IP_TTL).
  */
+
+/*
+ * following RFC1724 section 3.3, 0.0.0.0/8 is interpreted as interface index.
+ */
+static struct ifnet *
+ip_multicast_if(a, ifindexp)
+	struct in_addr *a;
+	int *ifindexp;
+{
+	int ifindex;
+	struct ifnet *ifp;
+
+	if (ifindexp)
+		*ifindexp = 0;
+	if (ntohl(a->s_addr) >> 24 == 0) {
+		ifindex = ntohl(a->s_addr) & 0xffffff;
+		if (ifindex < 0 || if_index < ifindex)
+			return NULL;
+		ifp = ifindex2ifnet[ifindex];
+		if (ifindexp)
+			*ifindexp = ifindex;
+	} else {
+		INADDR_TO_IFP(*a, ifp);
+	}
+	return ifp;
+}
+
 /*
  * Set the IP multicast options in response to user setsockopt().
  */
@@ -1496,6 +1532,7 @@ ip_setmoptions(sopt, imop)
 	struct ip_moptions *imo = *imop;
 	struct route ro;
 	struct sockaddr_in *dst;
+	int ifindex;
 	int s;
 
 	if (imo == NULL) {
@@ -1510,6 +1547,7 @@ ip_setmoptions(sopt, imop)
 			return (ENOBUFS);
 		*imop = imo;
 		imo->imo_multicast_ifp = NULL;
+		imo->imo_multicast_addr.s_addr = INADDR_ANY;
 		imo->imo_multicast_vif = -1;
 		imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL;
 		imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP;
@@ -1555,13 +1593,17 @@ ip_setmoptions(sopt, imop)
 		 * it supports multicasting.
 		 */
 		s = splimp();
-		INADDR_TO_IFP(addr, ifp);
+		ifp = ip_multicast_if(&addr, &ifindex);
 		if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) {
 			splx(s);
 			error = EADDRNOTAVAIL;
 			break;
 		}
 		imo->imo_multicast_ifp = ifp;
+		if (ifindex)
+			imo->imo_multicast_addr = addr;
+		else
+			imo->imo_multicast_addr.s_addr = INADDR_ANY;
 		splx(s);
 		break;
 
@@ -1648,7 +1690,7 @@ ip_setmoptions(sopt, imop)
 			rtfree(ro.ro_rt);
 		}
 		else {
-			INADDR_TO_IFP(mreq.imr_interface, ifp);
+			ifp = ip_multicast_if(&mreq.imr_interface, NULL);
 		}
 
 		/*
@@ -1716,7 +1758,7 @@ ip_setmoptions(sopt, imop)
 		if (mreq.imr_interface.s_addr == INADDR_ANY)
 			ifp = NULL;
 		else {
-			INADDR_TO_IFP(mreq.imr_interface, ifp);
+			ifp = ip_multicast_if(&mreq.imr_interface, NULL);
 			if (ifp == NULL) {
 				error = EADDRNOTAVAIL;
 				splx(s);
@@ -1798,7 +1840,10 @@ ip_getmoptions(sopt, imo)
 	case IP_MULTICAST_IF:
 		if (imo == NULL || imo->imo_multicast_ifp == NULL)
 			addr.s_addr = INADDR_ANY;
-		else {
+		else if (imo->imo_multicast_addr.s_addr) {
+			/* return the value user has set */
+			addr = imo->imo_multicast_addr;
+		} else {
 			IFP_TO_IA(imo->imo_multicast_ifp, ia);
 			addr.s_addr = (ia == NULL) ? INADDR_ANY
 				: IA_SIN(ia)->sin_addr.s_addr;
diff --git a/sys/netinet/ip_var.h b/sys/netinet/ip_var.h
index 6354d84..b318a1c 100644
--- a/sys/netinet/ip_var.h
+++ b/sys/netinet/ip_var.h
@@ -37,6 +37,8 @@
 #ifndef _NETINET_IP_VAR_H_
 #define	_NETINET_IP_VAR_H_
 
+#include <sys/queue.h>
+
 /*
  * Overlay for ip header used by other protocols (tcp, udp).
  */
@@ -86,6 +88,7 @@ struct ipoption {
  */
 struct ip_moptions {
 	struct	ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
+	struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
 	u_char	imo_multicast_ttl;	/* TTL for outgoing multicasts */
 	u_char	imo_multicast_loop;	/* 1 => hear sends if a member */
 	u_short	imo_num_memberships;	/* no. memberships this socket */
@@ -122,6 +125,7 @@ struct	ipstat {
 	u_long	ips_toolong;		/* ip length > max ip packet size */
 	u_long	ips_notmember;		/* multicasts for unregistered grps */
 	u_long	ips_nogif;		/* no match gif found */
+	u_long	ips_badaddr;		/* invalid address on header */
 };
 
 #ifdef _KERNEL
diff --git a/sys/netinet/raw_ip.c b/sys/netinet/raw_ip.c
index 4fdcf95..32c909a 100644
--- a/sys/netinet/raw_ip.c
+++ b/sys/netinet/raw_ip.c
@@ -137,6 +137,15 @@ rip_input(m, off, proto)
 			continue;
 		if (last) {
 			struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
+
+#ifdef IPSEC
+			/* check AH/ESP integrity. */
+			if (n && ipsec4_in_reject_so(n, last->inp_socket)) {
+				m_freem(n);
+				ipsecstat.in_polvio++;
+				/* do not inject data to pcb */
+			} else
+#endif /*IPSEC*/
 			if (n) {
 				if (last->inp_flags & INP_CONTROLOPTS ||
 				    last->inp_socket->so_options & SO_TIMESTAMP)
@@ -155,6 +164,15 @@ rip_input(m, off, proto)
 		}
 		last = inp;
 	}
+#ifdef IPSEC
+	/* check AH/ESP integrity. */
+	if (last && ipsec4_in_reject_so(m, last->inp_socket)) {
+		m_freem(m);
+		ipsecstat.in_polvio++;
+		ipstat.ips_delivered--;
+		/* do not inject data to pcb */
+	} else
+#endif /*IPSEC*/
 	if (last) {
 		if (last->inp_flags & INP_CONTROLOPTS ||
 		    last->inp_socket->so_options & SO_TIMESTAMP)
@@ -168,9 +186,9 @@ rip_input(m, off, proto)
 			sorwakeup(last->inp_socket);
 	} else {
 		m_freem(m);
-              ipstat.ips_noproto++;
-              ipstat.ips_delivered--;
-      }
+		ipstat.ips_noproto++;
+		ipstat.ips_delivered--;
+	}
 }
 
 /*
@@ -232,7 +250,10 @@ rip_output(m, so, dst)
 	}
 
 #ifdef IPSEC
-	ipsec_setsocket(m, so);
+	if (ipsec_setsocket(m, so) != 0) {
+		m_freem(m);
+		return ENOBUFS;
+	}
 #endif /*IPSEC*/
 
 	return (ip_output(m, inp->inp_options, &inp->inp_route, flags,
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index 34c2006..3554dae 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -305,6 +305,7 @@ tcp6_input(mp, offp, proto)
 	int *offp, proto;
 {
 	register struct mbuf *m = *mp;
+	struct in6_ifaddr *ia6;
 
 	IP6_EXTHDR_CHECK(m, *offp, sizeof(struct tcphdr), IPPROTO_DONE);
 
@@ -312,7 +313,8 @@ tcp6_input(mp, offp, proto)
 	 * draft-itojun-ipv6-tcp-to-anycast
 	 * better place to put this in?
 	 */
-	if (m->m_flags & M_ANYCAST6) {
+	ia6 = ip6_getdstifaddr(m);
+	if (ia6 && (ia6->ia6_flags & IN6_IFF_ANYCAST)) {		
 		struct ip6_hdr *ip6;
 
 		ip6 = mtod(m, struct ip6_hdr *);
@@ -379,6 +381,19 @@ tcp_input(m, off0, proto)
 			goto drop;
 		}
 		th = (struct tcphdr *)((caddr_t)ip6 + off0);
+
+		/*
+		 * Be proactive about unspecified IPv6 address in source.
+		 * As we use all-zero to indicate unbounded/unconnected pcb,
+		 * unspecified IPv6 address can be used to confuse us.
+		 *
+		 * Note that packets with unspecified IPv6 destination is
+		 * already dropped in ip6_input.
+		 */
+		if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
+			/* XXX stat */
+			goto drop;
+		}
 	} else
 #endif /* INET6 */
       {
@@ -627,18 +642,6 @@ findpcb:
 	else
 		tiwin = th->th_win;
 
-#ifdef INET6
-	/* save packet options if user wanted */
-	if (isipv6 && inp->in6p_flags & INP_CONTROLOPTS) {
-		if (inp->in6p_options) {
-			m_freem(inp->in6p_options);
-			inp->in6p_options = 0;
-		}
-		ip6_savecontrol(inp, &inp->in6p_options, ip6, m);
-	}
-        /* else, should also do ip_srcroute() here? */
-#endif /* INET6 */
-
 	so = inp->inp_socket;
 	if (so->so_options & (SO_DEBUG|SO_ACCEPTCONN)) {
 #ifdef TCPDEBUG
@@ -683,6 +686,50 @@ findpcb:
 				goto drop;
 			}
 #endif
+
+#ifdef INET6
+			/*
+			 * If deprecated address is forbidden,
+			 * we do not accept SYN to deprecated interface
+			 * address to prevent any new inbound connection from
+			 * getting established.
+			 * When we do not accept SYN, we send a TCP RST,
+			 * with deprecated source address (instead of dropping
+			 * it).  We compromise it as it is much better for peer
+			 * to send a RST, and RST will be the final packet
+			 * for the exchange.
+			 *
+			 * If we do not forbid deprecated addresses, we accept
+			 * the SYN packet.  RFC2462 does not suggest dropping
+			 * SYN in this case.
+			 * If we decipher RFC2462 5.5.4, it says like this:
+			 * 1. use of deprecated addr with existing
+			 *    communication is okay - "SHOULD continue to be
+			 *    used"
+			 * 2. use of it with new communication:
+			 *   (2a) "SHOULD NOT be used if alternate address
+			 *        with sufficient scope is available"
+			 *   (2b) nothing mentioned otherwise.
+			 * Here we fall into (2b) case as we have no choice in
+			 * our source address selection - we must obey the peer.
+			 *
+			 * The wording in RFC2462 is confusing, and there are
+			 * multiple description text for deprecated address
+			 * handling - worse, they are not exactly the same.
+			 * I believe 5.5.4 is the best one, so we follow 5.5.4.
+			 */
+			if (isipv6 && !ip6_use_deprecated) {
+				struct in6_ifaddr *ia6;
+
+				if ((ia6 = ip6_getdstifaddr(m)) &&
+				    (ia6->ia6_flags & IN6_IFF_DEPRECATED)) {
+					tp = NULL;
+					rstreason = BANDLIM_RST_OPENPORT;
+					goto dropwithreset;
+				}
+			}
+#endif
+
 			so2 = sonewconn(so, 0);
 			if (so2 == 0) {
 				/*
@@ -731,10 +778,8 @@ findpcb:
 			if (isipv6)
 				inp->in6p_laddr = ip6->ip6_dst;
 			else {
-				if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0) {
-					inp->inp_vflag &= ~INP_IPV6;
-					inp->inp_vflag |= INP_IPV4;
-				}
+				inp->inp_vflag &= ~INP_IPV6;
+				inp->inp_vflag |= INP_IPV4;
 #endif /* INET6 */
 			inp->inp_laddr = ip->ip_dst;
 #ifdef INET6
@@ -779,21 +824,25 @@ findpcb:
 #endif
 #ifdef INET6
 			if (isipv6) {
-				/*
-				 * inherit socket options from the listening
-				 * socket.
-				 */
+  				/*
+ 				 * Inherit socket options from the listening
+  				 * socket.
+ 				 * Note that in6p_inputopts are not (even
+ 				 * should not be) copied, since it stores
+				 * previously received options and is used to
+ 				 * detect if each new option is different than
+ 				 * the previous one and hence should be passed
+ 				 * to a user.
+ 				 * If we copied in6p_inputopts, a user would
+ 				 * not be able to receive options just after
+ 				 * calling the accept system call.
+ 				 */
 				inp->inp_flags |=
 					oinp->inp_flags & INP_CONTROLOPTS;
-				if (inp->inp_flags & INP_CONTROLOPTS) {
-					if (inp->in6p_options) {
-						m_freem(inp->in6p_options);
-						inp->in6p_options = 0;
-					}
-					ip6_savecontrol(inp,
-							&inp->in6p_options,
-							ip6, m);
-				}
+ 				if (oinp->in6p_outputopts)
+ 					inp->in6p_outputopts =
+ 						ip6_copypktopts(oinp->in6p_outputopts,
+ 								M_NOWAIT);
 			} else
 #endif /* INET6 */
 			inp->inp_options = ip_srcroute();
diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
index 286b420..a2a2cf3 100644
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -376,7 +376,7 @@ send:
 	 * NOTE: we assume that the IP/TCP header plus TCP options
 	 * always fit in a single mbuf, leaving room for a maximum
 	 * link header, i.e.
-	 *	max_linkhdr + sizeof (struct tcpiphdr) + optlen <= MHLEN
+	 *	max_linkhdr + sizeof (struct tcpiphdr) + optlen <= MCLBYTES
 	 */
 	optlen = 0;
 #ifdef INET6
@@ -823,7 +823,11 @@ send:
 
 		/* TODO: IPv6 IP6TOS_ECT bit on */
 #ifdef IPSEC
-		ipsec_setsocket(m, so);
+		if (ipsec_setsocket(m, so) != 0) {
+			m_freem(m);
+			error = ENOBUFS;
+			goto out;
+		}
 #endif /*IPSEC*/
 		error = ip6_output(m,
 			    tp->t_inpcb->in6p_outputopts,
diff --git a/sys/netinet/tcp_reass.c b/sys/netinet/tcp_reass.c
index 34c2006..3554dae 100644
--- a/sys/netinet/tcp_reass.c
+++ b/sys/netinet/tcp_reass.c
@@ -305,6 +305,7 @@ tcp6_input(mp, offp, proto)
 	int *offp, proto;
 {
 	register struct mbuf *m = *mp;
+	struct in6_ifaddr *ia6;
 
 	IP6_EXTHDR_CHECK(m, *offp, sizeof(struct tcphdr), IPPROTO_DONE);
 
@@ -312,7 +313,8 @@ tcp6_input(mp, offp, proto)
 	 * draft-itojun-ipv6-tcp-to-anycast
 	 * better place to put this in?
 	 */
-	if (m->m_flags & M_ANYCAST6) {
+	ia6 = ip6_getdstifaddr(m);
+	if (ia6 && (ia6->ia6_flags & IN6_IFF_ANYCAST)) {		
 		struct ip6_hdr *ip6;
 
 		ip6 = mtod(m, struct ip6_hdr *);
@@ -379,6 +381,19 @@ tcp_input(m, off0, proto)
 			goto drop;
 		}
 		th = (struct tcphdr *)((caddr_t)ip6 + off0);
+
+		/*
+		 * Be proactive about unspecified IPv6 address in source.
+		 * As we use all-zero to indicate unbounded/unconnected pcb,
+		 * unspecified IPv6 address can be used to confuse us.
+		 *
+		 * Note that packets with unspecified IPv6 destination is
+		 * already dropped in ip6_input.
+		 */
+		if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
+			/* XXX stat */
+			goto drop;
+		}
 	} else
 #endif /* INET6 */
       {
@@ -627,18 +642,6 @@ findpcb:
 	else
 		tiwin = th->th_win;
 
-#ifdef INET6
-	/* save packet options if user wanted */
-	if (isipv6 && inp->in6p_flags & INP_CONTROLOPTS) {
-		if (inp->in6p_options) {
-			m_freem(inp->in6p_options);
-			inp->in6p_options = 0;
-		}
-		ip6_savecontrol(inp, &inp->in6p_options, ip6, m);
-	}
-        /* else, should also do ip_srcroute() here? */
-#endif /* INET6 */
-
 	so = inp->inp_socket;
 	if (so->so_options & (SO_DEBUG|SO_ACCEPTCONN)) {
 #ifdef TCPDEBUG
@@ -683,6 +686,50 @@ findpcb:
 				goto drop;
 			}
 #endif
+
+#ifdef INET6
+			/*
+			 * If deprecated address is forbidden,
+			 * we do not accept SYN to deprecated interface
+			 * address to prevent any new inbound connection from
+			 * getting established.
+			 * When we do not accept SYN, we send a TCP RST,
+			 * with deprecated source address (instead of dropping
+			 * it).  We compromise it as it is much better for peer
+			 * to send a RST, and RST will be the final packet
+			 * for the exchange.
+			 *
+			 * If we do not forbid deprecated addresses, we accept
+			 * the SYN packet.  RFC2462 does not suggest dropping
+			 * SYN in this case.
+			 * If we decipher RFC2462 5.5.4, it says like this:
+			 * 1. use of deprecated addr with existing
+			 *    communication is okay - "SHOULD continue to be
+			 *    used"
+			 * 2. use of it with new communication:
+			 *   (2a) "SHOULD NOT be used if alternate address
+			 *        with sufficient scope is available"
+			 *   (2b) nothing mentioned otherwise.
+			 * Here we fall into (2b) case as we have no choice in
+			 * our source address selection - we must obey the peer.
+			 *
+			 * The wording in RFC2462 is confusing, and there are
+			 * multiple description text for deprecated address
+			 * handling - worse, they are not exactly the same.
+			 * I believe 5.5.4 is the best one, so we follow 5.5.4.
+			 */
+			if (isipv6 && !ip6_use_deprecated) {
+				struct in6_ifaddr *ia6;
+
+				if ((ia6 = ip6_getdstifaddr(m)) &&
+				    (ia6->ia6_flags & IN6_IFF_DEPRECATED)) {
+					tp = NULL;
+					rstreason = BANDLIM_RST_OPENPORT;
+					goto dropwithreset;
+				}
+			}
+#endif
+
 			so2 = sonewconn(so, 0);
 			if (so2 == 0) {
 				/*
@@ -731,10 +778,8 @@ findpcb:
 			if (isipv6)
 				inp->in6p_laddr = ip6->ip6_dst;
 			else {
-				if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0) {
-					inp->inp_vflag &= ~INP_IPV6;
-					inp->inp_vflag |= INP_IPV4;
-				}
+				inp->inp_vflag &= ~INP_IPV6;
+				inp->inp_vflag |= INP_IPV4;
 #endif /* INET6 */
 			inp->inp_laddr = ip->ip_dst;
 #ifdef INET6
@@ -779,21 +824,25 @@ findpcb:
 #endif
 #ifdef INET6
 			if (isipv6) {
-				/*
-				 * inherit socket options from the listening
-				 * socket.
-				 */
+  				/*
+ 				 * Inherit socket options from the listening
+  				 * socket.
+ 				 * Note that in6p_inputopts are not (even
+ 				 * should not be) copied, since it stores
+				 * previously received options and is used to
+ 				 * detect if each new option is different than
+ 				 * the previous one and hence should be passed
+ 				 * to a user.
+ 				 * If we copied in6p_inputopts, a user would
+ 				 * not be able to receive options just after
+ 				 * calling the accept system call.
+ 				 */
 				inp->inp_flags |=
 					oinp->inp_flags & INP_CONTROLOPTS;
-				if (inp->inp_flags & INP_CONTROLOPTS) {
-					if (inp->in6p_options) {
-						m_freem(inp->in6p_options);
-						inp->in6p_options = 0;
-					}
-					ip6_savecontrol(inp,
-							&inp->in6p_options,
-							ip6, m);
-				}
+ 				if (oinp->in6p_outputopts)
+ 					inp->in6p_outputopts =
+ 						ip6_copypktopts(oinp->in6p_outputopts,
+ 								M_NOWAIT);
 			} else
 #endif /* INET6 */
 			inp->inp_options = ip_srcroute();
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index 3857b75..06849be 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -443,7 +443,10 @@ tcp_respond(tp, ipgen, th, m, ack, seq, flags)
 		tcp_trace(TA_OUTPUT, 0, tp, mtod(m, void *), th, 0);
 #endif
 #ifdef IPSEC
-	ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL);
+	if (ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL) != 0) {
+		m_freem(m);
+		return;
+	}
 #endif
 #ifdef INET6
 	if (isipv6) {
@@ -1020,13 +1023,17 @@ tcp6_ctlinput(cmd, sa, d)
 	struct sockaddr *sa;
 	void *d;
 {
-	register struct tcphdr *thp;
 	struct tcphdr th;
 	void (*notify) __P((struct inpcb *, int)) = tcp_notify;
-	struct sockaddr_in6 sa6;
 	struct ip6_hdr *ip6;
 	struct mbuf *m;
+	struct ip6ctlparam *ip6cp = NULL;
+	const struct sockaddr_in6 *sa6_src = NULL;
 	int off;
+	struct tcp_portonly {
+		u_int16_t th_sport;
+		u_int16_t th_dport;
+	} *thp;
 
 	if (sa->sa_family != AF_INET6 ||
 	    sa->sa_len != sizeof(struct sockaddr_in6))
@@ -1042,56 +1049,36 @@ tcp6_ctlinput(cmd, sa, d)
 
 	/* if the parameter is from icmp6, decode it. */
 	if (d != NULL) {
-		struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d;
+		ip6cp = (struct ip6ctlparam *)d;
 		m = ip6cp->ip6c_m;
 		ip6 = ip6cp->ip6c_ip6;
 		off = ip6cp->ip6c_off;
+		sa6_src = ip6cp->ip6c_src;
 	} else {
 		m = NULL;
 		ip6 = NULL;
 		off = 0;	/* fool gcc */
+		sa6_src = &sa6_any;
 	}
 
-	/*
-	 * Translate addresses into internal form.
-	 * Sa check if it is AF_INET6 is done at the top of this funciton.
-	 */
-	sa6 = *(struct sockaddr_in6 *)sa;
-	if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) != 0 && m != NULL &&
-	    m->m_pkthdr.rcvif != NULL)
-		sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
-
 	if (ip6) {
 		/*
 		 * XXX: We assume that when IPV6 is non NULL,
 		 * M and OFF are valid.
 		 */
-		struct in6_addr s;
-
-		/* translate addresses into internal form */
-		memcpy(&s, &ip6->ip6_src, sizeof(s));
-		if (IN6_IS_ADDR_LINKLOCAL(&s) != 0 && m != NULL &&
-		    m->m_pkthdr.rcvif != NULL)
-			s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
 
 		/* check if we can safely examine src and dst ports */
-		if (m->m_pkthdr.len < off + sizeof(th))
+		if (m->m_pkthdr.len < off + sizeof(*thp))
 			return;
 
-		if (m->m_len < off + sizeof(th)) {
-			/*
-			 * this should be rare case
-			 * because now MINCLSIZE is "(MHLEN + 1)",
-			 * so we compromise on this copy...
-			 */
-			m_copydata(m, off, sizeof(th), (caddr_t)&th);
-			thp = &th;
-		} else
-			thp = (struct tcphdr *)(mtod(m, caddr_t) + off);
-		in6_pcbnotify(&tcb, (struct sockaddr *)&sa6, thp->th_dport,
-			      &s, thp->th_sport, cmd, notify);
+		bzero(&th, sizeof(th));
+		m_copydata(m, off, sizeof(*thp), (caddr_t)&th);
+
+		in6_pcbnotify(&tcb, sa, th.th_dport,
+		    (struct sockaddr *)ip6cp->ip6c_src,
+		    th.th_sport, cmd, notify);
 	} else
-		in6_pcbnotify(&tcb, (struct sockaddr *)&sa6, 0, &zeroin6_addr,
+		in6_pcbnotify(&tcb, sa, 0, (struct sockaddr *)sa6_src,
 			      0, cmd, notify);
 }
 #endif /* INET6 */
@@ -1323,9 +1310,12 @@ tcp_rtlookup6(inp)
 	if (rt == NULL || !(rt->rt_flags & RTF_UP)) {
 		/* No route yet, so try to acquire one */
 		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
-			ro6->ro_dst.sin6_family = AF_INET6;
-			ro6->ro_dst.sin6_len = sizeof(ro6->ro_dst);
-			ro6->ro_dst.sin6_addr = inp->in6p_faddr;
+			struct sockaddr_in6 *dst6;
+
+			dst6 = (struct sockaddr_in6 *)&ro6->ro_dst;
+			dst6->sin6_family = AF_INET6;
+			dst6->sin6_len = sizeof(ro6->ro_dst);
+			dst6->sin6_addr = inp->in6p_faddr;
 			rtalloc((struct route *)ro6);
 			rt = ro6->ro_rt;
 		}
@@ -1376,6 +1366,7 @@ ipsec_hdrsiz_tcp(tp)
 	      sizeof(struct ip));
 	bcopy((caddr_t)&tp->t_template->tt_t, (caddr_t)th,
 	      sizeof(struct tcphdr));
+	ip->ip_vhl = IP_VHL_BORING;
 	hdrsiz = ipsec4_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
       }
 
diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c
index 3857b75..06849be 100644
--- a/sys/netinet/tcp_timewait.c
+++ b/sys/netinet/tcp_timewait.c
@@ -443,7 +443,10 @@ tcp_respond(tp, ipgen, th, m, ack, seq, flags)
 		tcp_trace(TA_OUTPUT, 0, tp, mtod(m, void *), th, 0);
 #endif
 #ifdef IPSEC
-	ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL);
+	if (ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL) != 0) {
+		m_freem(m);
+		return;
+	}
 #endif
 #ifdef INET6
 	if (isipv6) {
@@ -1020,13 +1023,17 @@ tcp6_ctlinput(cmd, sa, d)
 	struct sockaddr *sa;
 	void *d;
 {
-	register struct tcphdr *thp;
 	struct tcphdr th;
 	void (*notify) __P((struct inpcb *, int)) = tcp_notify;
-	struct sockaddr_in6 sa6;
 	struct ip6_hdr *ip6;
 	struct mbuf *m;
+	struct ip6ctlparam *ip6cp = NULL;
+	const struct sockaddr_in6 *sa6_src = NULL;
 	int off;
+	struct tcp_portonly {
+		u_int16_t th_sport;
+		u_int16_t th_dport;
+	} *thp;
 
 	if (sa->sa_family != AF_INET6 ||
 	    sa->sa_len != sizeof(struct sockaddr_in6))
@@ -1042,56 +1049,36 @@ tcp6_ctlinput(cmd, sa, d)
 
 	/* if the parameter is from icmp6, decode it. */
 	if (d != NULL) {
-		struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d;
+		ip6cp = (struct ip6ctlparam *)d;
 		m = ip6cp->ip6c_m;
 		ip6 = ip6cp->ip6c_ip6;
 		off = ip6cp->ip6c_off;
+		sa6_src = ip6cp->ip6c_src;
 	} else {
 		m = NULL;
 		ip6 = NULL;
 		off = 0;	/* fool gcc */
+		sa6_src = &sa6_any;
 	}
 
-	/*
-	 * Translate addresses into internal form.
-	 * Sa check if it is AF_INET6 is done at the top of this funciton.
-	 */
-	sa6 = *(struct sockaddr_in6 *)sa;
-	if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) != 0 && m != NULL &&
-	    m->m_pkthdr.rcvif != NULL)
-		sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
-
 	if (ip6) {
 		/*
 		 * XXX: We assume that when IPV6 is non NULL,
 		 * M and OFF are valid.
 		 */
-		struct in6_addr s;
-
-		/* translate addresses into internal form */
-		memcpy(&s, &ip6->ip6_src, sizeof(s));
-		if (IN6_IS_ADDR_LINKLOCAL(&s) != 0 && m != NULL &&
-		    m->m_pkthdr.rcvif != NULL)
-			s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
 
 		/* check if we can safely examine src and dst ports */
-		if (m->m_pkthdr.len < off + sizeof(th))
+		if (m->m_pkthdr.len < off + sizeof(*thp))
 			return;
 
-		if (m->m_len < off + sizeof(th)) {
-			/*
-			 * this should be rare case
-			 * because now MINCLSIZE is "(MHLEN + 1)",
-			 * so we compromise on this copy...
-			 */
-			m_copydata(m, off, sizeof(th), (caddr_t)&th);
-			thp = &th;
-		} else
-			thp = (struct tcphdr *)(mtod(m, caddr_t) + off);
-		in6_pcbnotify(&tcb, (struct sockaddr *)&sa6, thp->th_dport,
-			      &s, thp->th_sport, cmd, notify);
+		bzero(&th, sizeof(th));
+		m_copydata(m, off, sizeof(*thp), (caddr_t)&th);
+
+		in6_pcbnotify(&tcb, sa, th.th_dport,
+		    (struct sockaddr *)ip6cp->ip6c_src,
+		    th.th_sport, cmd, notify);
 	} else
-		in6_pcbnotify(&tcb, (struct sockaddr *)&sa6, 0, &zeroin6_addr,
+		in6_pcbnotify(&tcb, sa, 0, (struct sockaddr *)sa6_src,
 			      0, cmd, notify);
 }
 #endif /* INET6 */
@@ -1323,9 +1310,12 @@ tcp_rtlookup6(inp)
 	if (rt == NULL || !(rt->rt_flags & RTF_UP)) {
 		/* No route yet, so try to acquire one */
 		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
-			ro6->ro_dst.sin6_family = AF_INET6;
-			ro6->ro_dst.sin6_len = sizeof(ro6->ro_dst);
-			ro6->ro_dst.sin6_addr = inp->in6p_faddr;
+			struct sockaddr_in6 *dst6;
+
+			dst6 = (struct sockaddr_in6 *)&ro6->ro_dst;
+			dst6->sin6_family = AF_INET6;
+			dst6->sin6_len = sizeof(ro6->ro_dst);
+			dst6->sin6_addr = inp->in6p_faddr;
 			rtalloc((struct route *)ro6);
 			rt = ro6->ro_rt;
 		}
@@ -1376,6 +1366,7 @@ ipsec_hdrsiz_tcp(tp)
 	      sizeof(struct ip));
 	bcopy((caddr_t)&tp->t_template->tt_t, (caddr_t)th,
 	      sizeof(struct tcphdr));
+	ip->ip_vhl = IP_VHL_BORING;
 	hdrsiz = ipsec4_hdrsiz(m, IPSEC_DIR_OUTBOUND, inp);
       }
 
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c
index 25834d4..aea92c0 100644
--- a/sys/netinet/tcp_usrreq.c
+++ b/sys/netinet/tcp_usrreq.c
@@ -240,8 +240,7 @@ tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
 	}
 	inp->inp_vflag &= ~INP_IPV4;
 	inp->inp_vflag |= INP_IPV6;
-	if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0) {
-
+	if (ip6_mapped_addr_on && (inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6p->sin6_addr))
 			inp->inp_vflag |= INP_IPV4;
 		else if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
@@ -292,7 +291,8 @@ tcp6_usr_listen(struct socket *so, struct proc *p)
 	COMMON_START();
 	if (inp->inp_lport == 0) {
 		inp->inp_vflag &= ~INP_IPV4;
-		if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0)
+		if (ip6_mapped_addr_on &&
+		    (inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
 			inp->inp_vflag |= INP_IPV4;
 		error = in6_pcbbind(inp, (struct sockaddr *)0, p);
 	}
@@ -361,10 +361,13 @@ tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
 		goto out;
 	}
 
-	if ((inp->inp_flags & IN6P_BINDV6ONLY) == 0 &&
-	    IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
+	if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
 		struct sockaddr_in sin;
 
+		if (!ip6_mapped_addr_on ||
+		    (inp->inp_flags & IN6P_IPV6_V6ONLY))
+			return(EINVAL);
+
 		in6_sin6_2_sin(&sin, sin6p);
 		inp->inp_vflag |= INP_IPV4;
 		inp->inp_vflag &= ~INP_IPV6;
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
index 350a384..d546b1f 100644
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -392,8 +392,7 @@ udp_input(m, off, proto)
 #endif
 		ip_savecontrol(inp, &opts, ip, m);
 	}
-	iphlen += sizeof(struct udphdr);
-	m_adj(m, iphlen);
+ 	m_adj(m, iphlen + sizeof(struct udphdr));
 #ifdef INET6
 	if (inp->inp_vflag & INP_IPV6) {
 		in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
@@ -744,7 +743,10 @@ udp_output(inp, m, addr, control, p)
 	udpstat.udps_opackets++;
 
 #ifdef IPSEC
-	ipsec_setsocket(m, inp->inp_socket);
+	if (ipsec_setsocket(m, inp->inp_socket) != 0) {
+		error = ENOBUFS;
+		goto release;
+	}
 #endif /*IPSEC*/
 	error = ip_output(m, inp->inp_options, &inp->inp_route,
 	    (inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)),