Import ipfilter 3.2.7 kernel components

14 files changed, 251 insertions, 102 deletions

diff --git a/sys/netinet/fil.c b/sys/netinet/fil.c
index 58c28e14..f2b19a5 100644
--- a/sys/netinet/fil.c
+++ b/sys/netinet/fil.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)fil.c	1.36 6/5/96 (C) 1993-1996 Darren Reed";
-static const char rcsid[] = "@(#)$Id: fil.c,v 2.0.2.41.2.9 1997/12/02 13:56:06 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: fil.c,v 2.0.2.41.2.14 1998/05/23 19:20:30 darrenr Exp $";
 #endif
 
 #include <sys/errno.h>
@@ -21,6 +21,7 @@ static const char rcsid[] = "@(#)$Id: fil.c,v 2.0.2.41.2.9 1997/12/02 13:56:06 d
 #else
 # include <stdio.h>
 # include <string.h>
+# include <stdlib.h>
 #endif
 #include <sys/uio.h>
 #if !defined(__SVR4) && !defined(__svr4__)
@@ -194,6 +195,7 @@ fr_info_t *fin;
 {
 	struct optlist *op;
 	tcphdr_t *tcp;
+	icmphdr_t *icmp;
 	fr_ip_t *fi = &fin->fin_fi;
 	u_short optmsk = 0, secmsk = 0, auth = 0;
 	int i, mv, ol, off;
@@ -214,6 +216,7 @@ fr_info_t *fin;
 	fin->fin_hlen = hlen;
 	fin->fin_dlen = ip->ip_len - hlen;
 	tcp = (tcphdr_t *)((char *)ip + hlen);
+	icmp = (icmphdr_t *)tcp;
 	fin->fin_dp = (void *)tcp;
 	(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
 	(*(((u_32_t *)fi) + 1)) = (*(((u_32_t *)ip) + 3));
@@ -226,12 +229,20 @@ fr_info_t *fin;
 	switch (ip->ip_p)
 	{
 	case IPPROTO_ICMP :
-		if ((!IPMINLEN(ip, icmp) && !off) ||
+	{
+		int minicmpsz = sizeof(struct icmp);
+
+		if (!off && ip->ip_len > ICMP_MINLEN + hlen &&
+		    (icmp->icmp_type == ICMP_ECHOREPLY ||
+		     icmp->icmp_type == ICMP_UNREACH))
+			minicmpsz = ICMP_MINLEN;
+		if ((!(ip->ip_len >= hlen + minicmpsz) && !off) ||
 		    (off && off < sizeof(struct icmp)))
 			fi->fi_fl |= FI_SHORT;
 		if (fin->fin_dlen > 1)
 			fin->fin_data[0] = *(u_short *)tcp;
 		break;
+	}
 	case IPPROTO_TCP :
 		fi->fi_fl |= FI_TCPUDP;
 		if ((!IPMINLEN(ip, tcphdr) && !off) ||
@@ -418,7 +429,7 @@ void *m;
 	off = ip->ip_off & 0x1fff;
 	pass |= (fi->fi_fl << 24);
 
-	if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
+	 if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
 		portcmp = 1;
 
 	for (rulen = 0; fr; fr = fr->fr_next, rulen++) {
@@ -475,24 +486,22 @@ void *m;
 		 * If a fragment, then only the first has what we're looking
 		 * for here...
 		 */
+		if (!portcmp && (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf ||
+				 fr->fr_tcpfm))
+			continue;
 		if (fi->fi_fl & FI_TCPUDP) {
-			if (portcmp) {
-				if (!fr_tcpudpchk(fr, fin))
-					continue;
-			} else if (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf ||
-				   fr->fr_tcpfm)
+			if (!fr_tcpudpchk(fr, fin))
 				continue;
-		} else if (fi->fi_p == IPPROTO_ICMP) {
-			if (!off && (fin->fin_dlen > 1)) {
-				if ((fin->fin_data[0] & fr->fr_icmpm) !=
-				    fr->fr_icmp) {
-					FR_DEBUG(("i. %#x & %#x != %#x\n",
-						 fin->fin_data[0],
-						 fr->fr_icmpm, fr->fr_icmp));
-					continue;
-				}
-			} else if (fr->fr_icmpm || fr->fr_icmp)
+		} else if (fr->fr_icmpm || fr->fr_icmp) {
+			if ((fi->fi_p != IPPROTO_ICMP) || off ||
+			    (fin->fin_dlen < 2))
 				continue;
+			if ((fin->fin_data[0] & fr->fr_icmpm) != fr->fr_icmp) {
+				FR_DEBUG(("i. %#x & %#x != %#x\n",
+					 fin->fin_data[0], fr->fr_icmpm,
+					 fr->fr_icmp));
+				continue;
+			}
 		}
 		FR_VERBOSE(("*"));
 		/*
@@ -571,6 +580,15 @@ int out;
 #  endif
 	int up;
 
+#ifdef M_CANFASTFWD
+	/*
+	 * XXX For now, IP Filter and fast-forwarding of cached flows
+	 * XXX are mutually exclusive.  Eventually, IP Filter should
+	 * XXX get a "can-fast-forward" filter rule.
+	 */
+	m->m_flags &= ~M_CANFASTFWD;
+#endif /* M_CANFASTFWD */
+
 	if ((ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP ||
 	     ip->ip_p == IPPROTO_ICMP)) {
 		int plen = 0;
@@ -887,7 +905,7 @@ u_short ipf_cksum(addr, len)
 register u_short *addr;
 register int len;
 {
-	register u_long sum = 0;
+	register u_32_t sum = 0;
 
 	for (sum = 0; len > 1; len -= 2)
 		sum += *addr++;
@@ -920,7 +938,7 @@ int len;
 		u_char	c[2];
 		u_short	s;
 	} bytes;
-	u_long sum;
+	u_32_t sum;
 	u_short	*sp;
 # if SOLARIS || defined(__sgi)
 	int add, hlen;
@@ -1019,7 +1037,7 @@ int len;
 #endif /* SOLARIS */
 		if (len < 2)
 			break;
-		if((u_long)sp & 1) {
+		if((u_32_t)sp & 1) {
 			bcopy((char *)sp++, (char *)&bytes.s, sizeof(bytes.s));
 			sum += bytes.s;
 		} else
@@ -1073,7 +1091,7 @@ nodata:
  * SUCH DAMAGE.
  *
  *	@(#)uipc_mbuf.c	8.2 (Berkeley) 1/4/94
- * $Id: fil.c,v 2.0.2.41.2.9 1997/12/02 13:56:06 darrenr Exp $
+ * $Id: fil.c,v 2.0.2.41.2.14 1998/05/23 19:20:30 darrenr Exp $
  */
 /*
  * Copy data from an mbuf chain starting "off" bytes from the beginning,
diff --git a/sys/netinet/ip_auth.c b/sys/netinet/ip_auth.c
index 2640a77..bdb3114 100644
--- a/sys/netinet/ip_auth.c
+++ b/sys/netinet/ip_auth.c
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  */
 #if !defined(lint)
-static const char rcsid[] = "@(#)$Id: ip_auth.c,v 2.0.2.21.2.2 1997/11/12 10:45:51 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_auth.c,v 2.0.2.21.2.3 1998/04/08 13:43:29 darrenr Exp $";
 #endif
 
 #if !defined(_KERNEL) && !defined(KERNEL)
@@ -86,6 +86,9 @@ extern struct ifqueue   ipintrq;                /* ip packet input queue */
 #include "netinet/ip_auth.h"
 #if !SOLARIS && !defined(linux)
 # include <net/netisr.h>
+# ifdef __FreeBSD__
+#  include <machine/cpufunc.h>
+# endif
 #endif
 
 
diff --git a/sys/netinet/ip_compat.h b/sys/netinet/ip_compat.h
index 1fe90c3..1f91cf3 100644
--- a/sys/netinet/ip_compat.h
+++ b/sys/netinet/ip_compat.h
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ip_compat.h	1.8 1/14/96
- * $Id: ip_compat.h,v 2.0.2.31.2.8 1997/12/02 13:42:52 darrenr Exp $
+ * $Id: ip_compat.h,v 2.0.2.31.2.11 1998/05/23 14:29:36 darrenr Exp $
  */
 
 #ifndef	__IP_COMPAT_H__
@@ -123,7 +123,7 @@ typedef unsigned int    u_32_t;
 # else
 typedef unsigned long   u_32_t;
 # endif
-#endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ */
+#endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ || __sgi */
 
 #ifndef	MAX
 #define	MAX(a,b)	(((a) > (b)) ? (a) : (b))
@@ -369,6 +369,9 @@ typedef struct mbuf mb_t;
  * not be in other places or maybe one day linux will grow up and some
  * of these will turn up there too.
  */
+#ifndef	ICMP_MINLEN
+# define	ICMP_MINLEN	8
+#endif
 #ifndef	ICMP_UNREACH
 # define	ICMP_UNREACH	ICMP_DEST_UNREACH
 #endif
@@ -680,6 +683,12 @@ typedef	struct	uio	{
 #  undef UINT_MAX
 #  undef LONG_MAX
 #  undef ULONG_MAX
+#  define	s8 __s8
+#  define	u8 __u8
+#  define	s16 __s16
+#  define	u16 __u16
+#  define	s32 __s32
+#  define	u32 __u32
 #  include <linux/netdevice.h>
 #  undef	__KERNEL__
 # endif
@@ -714,4 +723,5 @@ struct	ether_addr	{
 #ifndef	ICMP_ROUTERSOLICIT
 # define	ICMP_ROUTERSOLICIT	10
 #endif
+
 #endif	/* __IP_COMPAT_H__ */
diff --git a/sys/netinet/ip_fil.c b/sys/netinet/ip_fil.c
index d518d17..09c4b6e 100644
--- a/sys/netinet/ip_fil.c
+++ b/sys/netinet/ip_fil.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_fil.c	2.41 6/5/96 (C) 1993-1995 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_fil.c,v 2.0.2.44.2.5 1997/11/24 10:02:02 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_fil.c,v 2.0.2.44.2.7 1998/05/03 10:55:49 darrenr Exp $";
 #endif
 
 #ifndef	SOLARIS
@@ -164,7 +164,7 @@ struct devsw iplsw = {
 };
 #endif /* _BSDI_VERSION >= 199510  && _KERNEL */
 
-#if defined(__NetBSD__) || defined(__OpenBSD__)
+#if defined(__NetBSD__) || defined(__OpenBSD__)  || (_BSDI_VERSION >= 199701)
 # include <sys/conf.h>
 # if defined(NETBSD_PF)
 #  include <net/pfil.h>
@@ -933,7 +933,8 @@ frdest_t *fdp;
 		if (ro->ro_rt->rt_flags & RTF_GATEWAY)
 			dst = (struct sockaddr_in *)&ro->ro_rt->rt_gateway;
 	}
-	ro->ro_rt->rt_use++;
+	if (ro->ro_rt)
+		ro->ro_rt->rt_use++;
 
 	/*
 	 * For input packets which are being "fastrouted", they won't
diff --git a/sys/netinet/ip_fil.h b/sys/netinet/ip_fil.h
index 2e2aaa7..edbd685 100644
--- a/sys/netinet/ip_fil.h
+++ b/sys/netinet/ip_fil.h
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ip_fil.h	1.35 6/5/96
- * $Id: ip_fil.h,v 2.0.2.39.2.10 1997/12/03 10:02:30 darrenr Exp $
+ * $Id: ip_fil.h,v 2.0.2.39.2.11 1998/05/23 14:29:37 darrenr Exp $
  */
 
 #ifndef	__IP_FIL_H__
@@ -518,4 +518,5 @@ extern	int	iplused[IPL_LOGMAX + 1];
 extern	struct frentry *ipfilter[2][2], *ipacct[2][2];
 extern	struct frgroup *ipfgroups[3][2];
 extern	struct filterstats frstats[];
+
 #endif	/* __IP_FIL_H__ */
diff --git a/sys/netinet/ip_frag.h b/sys/netinet/ip_frag.h
index ade7139..9122f17 100644
--- a/sys/netinet/ip_frag.h
+++ b/sys/netinet/ip_frag.h
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ip_frag.h	1.5 3/24/96
- * $Id: ip_frag.h,v 2.0.2.12 1997/10/23 14:56:01 darrenr Exp $
+ * $Id: ip_frag.h,v 2.0.2.12.2.1 1998/05/23 14:29:39 darrenr Exp $
  */
 
 #ifndef	__IP_FRAG_H__
@@ -55,4 +55,5 @@ extern	void	ipfr_slowtimer __P((void));
 #else
 extern	int	ipfr_slowtimer __P((void));
 #endif
+
 #endif	/* __IP_FIL_H__ */
diff --git a/sys/netinet/ip_ftp_pxy.c b/sys/netinet/ip_ftp_pxy.c
index 5d6ce1f..7ff8adb 100644
--- a/sys/netinet/ip_ftp_pxy.c
+++ b/sys/netinet/ip_ftp_pxy.c
@@ -54,18 +54,18 @@ tcphdr_t *tcp;
 ap_session_t *aps;
 nat_t *nat;
 {
-	u_long	sum1, sum2;
+	u_32_t	sum1, sum2;
 	short sel;
 
 	if (tcp->th_sport == aps->aps_dport) {
-		sum2 = (u_long)ntohl(tcp->th_ack);
+		sum2 = (u_32_t)ntohl(tcp->th_ack);
 		sel = aps->aps_sel;
 		if ((aps->aps_after[!sel] > aps->aps_after[sel]) &&
 			(sum2 > aps->aps_after[!sel])) {
 			sel = aps->aps_sel = !sel; /* switch to other set */
 		}
 		if (aps->aps_seqoff[sel] && (sum2 > aps->aps_after[sel])) {
-			sum1 = (u_long)aps->aps_seqoff[sel];
+			sum1 = (u_32_t)aps->aps_seqoff[sel];
 			tcp->th_ack = htonl(sum2 - sum1);
 			return 2;
 		}
@@ -110,7 +110,7 @@ tcphdr_t *tcp;
 ap_session_t *aps;
 nat_t *nat;
 {
-	register u_long	sum1, sum2;
+	register u_32_t	sum1, sum2;
 	char	newbuf[IPF_MAXPORTLEN+1];
 	char	portbuf[IPF_MAXPORTLEN+1], *s;
 	int	ch = 0, off = (ip->ip_hl << 2) + (tcp->th_off << 2);
@@ -243,17 +243,17 @@ nat_t *nat;
 
 adjust_seqack:
 	if (tcp->th_dport == aps->aps_dport) {
-		sum2 = (u_long)ntohl(tcp->th_seq);
+		sum2 = (u_32_t)ntohl(tcp->th_seq);
 		off = aps->aps_sel;
 		if ((aps->aps_after[!off] > aps->aps_after[off]) &&
 			(sum2 > aps->aps_after[!off])) {
 			off = aps->aps_sel = !off; /* switch to other set */
 		}
 		if (aps->aps_seqoff[off]) {
-			sum1 = (u_long)aps->aps_after[off] -
+			sum1 = (u_32_t)aps->aps_after[off] -
 			       aps->aps_seqoff[off];
 			if (sum2 > sum1) {
-				sum1 = (u_long)aps->aps_seqoff[off];
+				sum1 = (u_32_t)aps->aps_seqoff[off];
 				sum2 += sum1;
 				tcp->th_seq = htonl(sum2);
 				ch = 1;
diff --git a/sys/netinet/ip_nat.c b/sys/netinet/ip_nat.c
index 0b6c07f..102d57f 100644
--- a/sys/netinet/ip_nat.c
+++ b/sys/netinet/ip_nat.c
@@ -9,7 +9,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_nat.c	1.11 6/5/96 (C) 1995 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_nat.c,v 2.0.2.44.2.7 1997/12/02 13:54:27 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_nat.c,v 2.0.2.44.2.10 1998/05/23 19:05:29 darrenr Exp $";
 #endif
 
 #if defined(__FreeBSD__) && defined(KERNEL) && !defined(_KERNEL)
@@ -130,10 +130,10 @@ static	int	nat_ifpaddr __P((nat_t *, void *, struct in_addr *));
 
 void fix_outcksum(sp, n)
 u_short *sp;
-u_long n;
+u_32_t n;
 {
 	register u_short sumshort;
-	register u_long sum1;
+	register u_32_t sum1;
 
 	if (!n)
 		return;
@@ -149,10 +149,10 @@ u_long n;
 
 void fix_incksum(sp, n)
 u_short *sp;
-u_long n;
+u_32_t n;
 {
 	register u_short sumshort;
-	register u_long sum1;
+	register u_32_t sum1;
 
 	if (!n)
 		return;
@@ -456,7 +456,7 @@ struct in_addr *inp;
 	struct in_addr in;
 
 #if SOLARIS
-	in.s_addr = ill->ill_ipif->ipif_local_addr;
+	in.s_addr = ntohl(ill->ill_ipif->ipif_local_addr);
 #else /* SOLARIS */
 # if linux
 	;
@@ -521,7 +521,7 @@ fr_info_t *fin;
 u_short flags;
 int direction;
 {
-	register u_long sum1, sum2, sumd, l;
+	register u_32_t sum1, sum2, sumd, l;
 	u_short port = 0, sport = 0, dport = 0, nport = 0;
 	struct in_addr in;
 	tcphdr_t *tcp = NULL;
@@ -779,7 +779,7 @@ int *nflags;
 	 */
 	if (flags & IPN_TCPUDP) {
 		tcphdr_t *tcp = (tcphdr_t *)(oip + 1);
-		u_long	sum1, sum2, sumd;
+		u_32_t	sum1, sum2, sumd;
 		struct in_addr in;
 
 		if (nat->nat_dir == NAT_OUTBOUND) {
@@ -964,7 +964,7 @@ int hlen;
 fr_info_t *fin;
 {
 	register ipnat_t *np;
-	register u_long ipa;
+	register u_32_t ipa;
 	tcphdr_t *tcp = NULL;
 	u_short nflags = 0, sport = 0, dport = 0, *csump = NULL;
 	struct ifnet *ifp;
@@ -1281,7 +1281,7 @@ void *ifp;
 #endif
 {
 	register nat_t *nat;
-	register u_long sum1, sum2, sumd;
+	register u_32_t sum1, sum2, sumd;
 	struct in_addr in;
 	ipnat_t *np;
 #if defined(_KERNEL) && !SOLARIS
diff --git a/sys/netinet/ip_nat.h b/sys/netinet/ip_nat.h
index f0cb517..49f5d50 100644
--- a/sys/netinet/ip_nat.h
+++ b/sys/netinet/ip_nat.h
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ip_nat.h	1.5 2/4/96
- * $Id: ip_nat.h,v 2.0.2.23.2.1 1997/11/05 11:08:18 darrenr Exp $
+ * $Id: ip_nat.h,v 2.0.2.23.2.3 1998/05/23 18:52:44 darrenr Exp $
  */
 
 #ifndef	__IP_NAT_H__
@@ -44,8 +44,8 @@
 typedef	struct	nat	{
 	u_long	nat_age;
 	int	nat_flags;
-	u_long	nat_sumd;
-	u_long	nat_ipsumd;
+	u_32_t	nat_sumd;
+	u_32_t	nat_ipsumd;
 	void	*nat_data;
 	struct	in_addr	nat_inip;
 	struct	in_addr	nat_outip;
@@ -175,6 +175,7 @@ extern	int	ip_natout __P((ip_t *, int, fr_info_t *));
 extern	int	ip_natin __P((ip_t *, int, fr_info_t *));
 extern	void	ip_natunload __P((void)), ip_natexpire __P((void));
 extern	void	nat_log __P((struct nat *, u_short));
-extern	void	fix_incksum __P((u_short *, u_long));
-extern	void	fix_outcksum __P((u_short *, u_long));
+extern	void	fix_incksum __P((u_short *, u_32_t));
+extern	void	fix_outcksum __P((u_short *, u_32_t));
+
 #endif /* __IP_NAT_H__ */
diff --git a/sys/netinet/ip_proxy.c b/sys/netinet/ip_proxy.c
index cc3b9a0..0fb7e95 100644
--- a/sys/netinet/ip_proxy.c
+++ b/sys/netinet/ip_proxy.c
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  */
 #if !defined(lint)
-static const char rcsid[] = "@(#)$Id: ip_proxy.c,v 2.0.2.11.2.6 1997/11/28 00:41:25 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_proxy.c,v 2.0.2.11.2.7 1998/05/18 11:15:22 darrenr Exp $";
 #endif
 
 #if defined(__FreeBSD__) && defined(KERNEL) && !defined(_KERNEL)
@@ -111,15 +111,37 @@ ipnat_t *nat;
 }
 
 
+static int
+ap_matchsrcdst(aps, src, dst, tcp, sport, dport)
+ap_session_t *aps;
+struct in_addr src, dst;
+void *tcp;
+u_short sport, dport;
+{
+	if (aps->aps_dst.s_addr == dst.s_addr) {
+		if ((aps->aps_src.s_addr == src.s_addr) &&
+		    (!tcp || (sport == aps->aps_sport) &&
+		     (dport == aps->aps_dport)))
+			return 1;
+	} else if (aps->aps_dst.s_addr == src.s_addr) {
+		if ((aps->aps_src.s_addr == dst.s_addr) &&
+		    (!tcp || (sport == aps->aps_dport) &&
+		     (dport == aps->aps_sport)))
+			return 1;
+	}
+	return 0;
+}
+
+
 static ap_session_t *ap_find(ip, tcp)
 ip_t *ip;
 tcphdr_t *tcp;
 {
-	struct in_addr src, dst;
-	register u_long hv;
-	register u_short sp, dp;
-	register ap_session_t *aps;
 	register u_char p = ip->ip_p;
+	register ap_session_t *aps;
+	register u_short sp, dp;
+	register u_long hv;
+	struct in_addr src, dst;
 
 	src = ip->ip_src, dst = ip->ip_dst;
 	sp = dp = 0;			/* XXX gcc -Wunitialized */
@@ -136,14 +158,8 @@ tcphdr_t *tcp;
 
 	for (aps = ap_sess_tab[hv]; aps; aps = aps->aps_next)
 		if ((aps->aps_p == p) &&
-		    IPPAIR(aps->aps_src, aps->aps_dst, src, dst)) {
-			if (tcp) {
-				if (PAIRS(aps->aps_sport, aps->aps_dport,
-					  sp, dp))
-					break;
-			} else
-				break;
-		}
+		    ap_matchsrcdst(aps, src, dst, tcp, sp, dp))
+			break;
 	return aps;
 }
 
diff --git a/sys/netinet/ip_state.c b/sys/netinet/ip_state.c
index bffb17b..89a2c3b 100644
--- a/sys/netinet/ip_state.c
+++ b/sys/netinet/ip_state.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_state.c	1.8 6/5/96 (C) 1993-1995 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.0.2.24.2.4 1997/11/19 11:44:09 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.0.2.24.2.14 1998/05/24 03:53:04 darrenr Exp $";
 #endif
 
 #if !defined(_KERNEL) && !defined(KERNEL) && !defined(__KERNEL__)
@@ -85,6 +85,11 @@ ips_stat_t ips_stats;
 extern	kmutex_t	ipf_state;
 #endif
 
+static int fr_matchsrcdst __P((ipstate_t *, struct in_addr, struct in_addr,
+			       fr_info_t *, void *, u_short, u_short));
+static int fr_state_flush __P((int));
+static ips_stat_t *fr_statetstats __P((void));
+
 
 #define	FIVE_DAYS	(2 * 5 * 86400)	/* 5 days: half closed session */
 
@@ -97,7 +102,7 @@ u_long	fr_tcpidletimeout = FIVE_DAYS,
 	fr_icmptimeout = 120;
 
 
-ips_stat_t *fr_statetstats()
+static ips_stat_t *fr_statetstats()
 {
 	ips_stats.iss_active = ips_num;
 	ips_stats.iss_table = ips_table;
@@ -111,7 +116,7 @@ ips_stat_t *fr_statetstats()
  * which == 1 : flush TCP connections which have started to close but are
  *              stuck for some reason.
  */
-int fr_state_flush(which)
+static int fr_state_flush(which)
 int which;
 {
 	register int i;
@@ -134,10 +139,10 @@ int which;
 				break;
 			case 1 :
 				if ((is->is_p == IPPROTO_TCP) &&
-				    ((is->is_state[0] <= TCPS_ESTABLISHED) &&
-				     (is->is_state[1] > TCPS_ESTABLISHED)) ||
-				    ((is->is_state[1] <= TCPS_ESTABLISHED) &&
-				     (is->is_state[0] > TCPS_ESTABLISHED)))
+				    (((is->is_state[0] <= TCPS_ESTABLISHED) &&
+				      (is->is_state[1] > TCPS_ESTABLISHED)) ||
+				     ((is->is_state[1] <= TCPS_ESTABLISHED) &&
+				      (is->is_state[0] > TCPS_ESTABLISHED))))
 					delete = 1;
 				break;
 			}
@@ -237,7 +242,7 @@ u_int pass;
 		switch (ic->icmp_type)
 		{
 		case ICMP_ECHO :
-			is->is_icmp.ics_type = 0;
+			is->is_icmp.ics_type = ICMP_ECHOREPLY;	/* XXX */
 			hv += (is->is_icmp.ics_id = ic->icmp_id);
 			hv += (is->is_icmp.ics_seq = ic->icmp_seq);
 			break;
@@ -301,11 +306,33 @@ u_int pass;
 	bcopy((char *)&ips, (char *)is, sizeof(*is));
 	hv %= IPSTATE_SIZE;
 	MUTEX_ENTER(&ipf_state);
-	is->is_next = ips_table[hv];
-	ips_table[hv] = is;
+
 	is->is_pass = pass;
 	is->is_pkts = 1;
 	is->is_bytes = ip->ip_len;
+	/*
+	 * Copy these from the rule itself.
+	 */
+	is->is_opt = fin->fin_fr->fr_ip.fi_optmsk;
+	is->is_optmsk = fin->fin_fr->fr_mip.fi_optmsk;
+	is->is_sec = fin->fin_fr->fr_ip.fi_secmsk;
+	is->is_secmsk = fin->fin_fr->fr_mip.fi_secmsk;
+	is->is_auth = fin->fin_fr->fr_ip.fi_auth;
+	is->is_authmsk = fin->fin_fr->fr_mip.fi_auth;
+	is->is_flags = fin->fin_fr->fr_ip.fi_fl;
+	is->is_flags |= fin->fin_fr->fr_mip.fi_fl << 4;
+	/*
+	 * add into table.
+	 */
+	is->is_next = ips_table[hv];
+	ips_table[hv] = is;
+	if (fin->fin_out) {
+		is->is_ifpin = NULL;
+		is->is_ifpout = fin->fin_ifp;
+	} else {
+		is->is_ifpin = fin->fin_ifp;
+		is->is_ifpout = NULL;
+	}
 	if (pass & FR_LOGFIRST)
 		is->is_pass &= ~(FR_LOGFIRST|FR_LOG);
 	ips_num++;
@@ -324,12 +351,11 @@ u_int pass;
  * change timeout depending on whether new packet is a SYN-ACK returning for a
  * SYN or a RST or FIN which indicate time to close up shop.
  */
-int fr_tcpstate(is, fin, ip, tcp, sport)
+int fr_tcpstate(is, fin, ip, tcp)
 register ipstate_t *is;
 fr_info_t *fin;
 ip_t *ip;
 tcphdr_t *tcp;
-u_short sport;
 {
 	register int seqskew, ackskew;
 	register u_short swin, dwin;
@@ -341,7 +367,7 @@ u_short sport;
 	 */
 	seq = ntohl(tcp->th_seq);
 	ack = ntohl(tcp->th_ack);
-	source = (sport == is->is_sport);
+	source = (ip->ip_src.s_addr == is->is_src.s_addr);
 
 	if (!(tcp->th_flags & TH_ACK))  /* Pretend an ack was sent */
 		ack = source ? is->is_ack : is->is_seq;
@@ -385,7 +411,7 @@ u_short sport;
 		swin = is->is_dwin;
 	}
 
-	if ((seqskew <= swin) && (ackskew <= dwin)) {
+	if ((seqskew <= dwin) && (ackskew <= swin)) {
 		if (source) {
 			is->is_seq = seq;
 			is->is_ack = ack;
@@ -401,14 +427,81 @@ u_short sport;
 		/*
 		 * Nearing end of connection, start timeout.
 		 */
-		fr_tcp_age(&is->is_age, is->is_state, ip, fin,
-			   tcp->th_sport == is->is_sport);
+		fr_tcp_age(&is->is_age, is->is_state, ip, fin, source);
 		return 1;
 	}
 	return 0;
 }
 
 
+static int fr_matchsrcdst(is, src, dst, fin, tcp, sp, dp)
+ipstate_t *is;
+struct in_addr src, dst;
+fr_info_t *fin;
+void *tcp;
+u_short sp, dp;
+{
+	int ret = 0, rev, out;
+	void *ifp;
+
+	rev = (is->is_dst.s_addr != dst.s_addr);
+	ifp = fin->fin_ifp;
+	out = fin->fin_out;
+
+	if (!rev) {
+		if (out) {
+			if (!is->is_ifpout)
+				is->is_ifpout = ifp;
+		} else {
+			if (!is->is_ifpin)
+				is->is_ifpin = ifp;
+		}
+	} else {
+		if (out) {
+			if (!is->is_ifpin)
+				is->is_ifpin = ifp;
+		} else {
+			if (!is->is_ifpout)
+				is->is_ifpout = ifp;
+		}
+	}
+
+	if (!rev) {
+		if (((out && is->is_ifpout == ifp) ||
+		     (!out && is->is_ifpin == ifp)) &&
+		    (is->is_dst.s_addr == dst.s_addr) &&
+		    (is->is_src.s_addr == src.s_addr) &&
+		    (!tcp || (sp == is->is_sport) &&
+		     (dp == is->is_dport))) {
+			ret = 1;
+		}
+	} else {
+		if (((out && is->is_ifpin == ifp) ||
+		     (!out && is->is_ifpout == ifp)) &&
+		    (is->is_dst.s_addr == src.s_addr) &&
+		    (is->is_src.s_addr == dst.s_addr) &&
+		    (!tcp || (sp == is->is_dport) &&
+		     (dp == is->is_sport))) {
+			ret = 1;
+		}
+	}
+
+	/*
+	 * Whether or not this should be here, is questionable, but the aim
+	 * is to get this out of the main line.
+	 */
+	if (ret) {
+		if (((fin->fin_fi.fi_optmsk & is->is_optmsk) != is->is_opt) ||
+		    ((fin->fin_fi.fi_secmsk & is->is_secmsk) != is->is_sec) ||
+		    ((fin->fin_fi.fi_auth & is->is_authmsk) != is->is_auth) ||
+		    ((fin->fin_fi.fi_fl & (is->is_flags >> 4)) !=
+		     (is->is_flags & 0xf)))
+			ret = 0;
+	}
+	return ret;
+}
+
+
 /*
  * Check if a packet has a registered state.
  */
@@ -447,13 +540,8 @@ fr_info_t *fin;
 			if ((is->is_p == pr) &&
 			    (ic->icmp_id == is->is_icmp.ics_id) &&
 			    (ic->icmp_seq == is->is_icmp.ics_seq) &&
-			    IPPAIR(src, dst, is->is_src, is->is_dst)) {
-				/*
-				 * If we have type 0 stored, allow any icmp
-				 * replies through.
-				 */
-				if (is->is_icmp.ics_type &&
-				    is->is_icmp.ics_type != ic->icmp_type)
+			    fr_matchsrcdst(is, src, dst, fin, NULL, 0, 0)) {
+				if (is->is_icmp.ics_type != ic->icmp_type)
 					continue;
 				is->is_age = fr_icmptimeout;
 				is->is_pkts++;
@@ -473,11 +561,11 @@ fr_info_t *fin;
 		hv += sport;
 		hv %= IPSTATE_SIZE;
 		MUTEX_ENTER(&ipf_state);
-		for (isp = &ips_table[hv]; (is = *isp); isp = &is->is_next) {
+		for (isp = &ips_table[hv]; (is = *isp); isp = &is->is_next)
 			if ((is->is_p == pr) &&
-			    PAIRS(sport, dport, is->is_sport, is->is_dport) &&
-			    IPPAIR(src, dst, is->is_src, is->is_dst))
-				if (fr_tcpstate(is, fin, ip, tcp, sport)) {
+			    fr_matchsrcdst(is, src, dst, fin, tcp,
+					   sport, dport)) {
+				if (fr_tcpstate(is, fin, ip, tcp)) {
 					pass = is->is_pass;
 #ifdef	_KERNEL
 					MUTEX_EXIT(&ipf_state);
@@ -491,7 +579,7 @@ fr_info_t *fin;
 #endif
 					return pass;
 				}
-		}
+			}
 		MUTEX_EXIT(&ipf_state);
 		break;
 	    }
@@ -508,8 +596,8 @@ fr_info_t *fin;
 		MUTEX_ENTER(&ipf_state);
 		for (is = ips_table[hv]; is; is = is->is_next)
 			if ((is->is_p == pr) &&
-			    PAIRS(sport, dport, is->is_sport, is->is_dport) &&
-			    IPPAIR(src, dst, is->is_src, is->is_dst)) {
+			    fr_matchsrcdst(is, src, dst, fin,
+					   tcp, sport, dport)) {
 				ips_stats.iss_hits++;
 				is->is_pkts++;
 				is->is_bytes += ip->ip_len;
diff --git a/sys/netinet/ip_state.h b/sys/netinet/ip_state.h
index 3d87a21..f2ae94b 100644
--- a/sys/netinet/ip_state.h
+++ b/sys/netinet/ip_state.h
@@ -6,7 +6,7 @@
  * to the original author and the contributors.
  *
  * @(#)ip_state.h	1.3 1/12/96 (C) 1995 Darren Reed
- * $Id: ip_state.h,v 2.0.2.14.2.1 1997/11/06 21:23:15 darrenr Exp $
+ * $Id: ip_state.h,v 2.0.2.14.2.6 1998/05/24 05:18:04 darrenr Exp $
  */
 #ifndef	__IP_STATE_H__
 #define	__IP_STATE_H__
@@ -47,10 +47,18 @@ typedef struct ipstate {
 	u_int	is_pass;
 	U_QUAD_T	is_pkts;
 	U_QUAD_T	is_bytes;
+	void	*is_ifpin;
+	void	*is_ifpout;
 	struct	in_addr	is_src;
 	struct	in_addr	is_dst;
 	u_char	is_p;
 	u_char	is_flags;
+	u_32_t	is_opt;
+	u_32_t	is_optmsk;
+	u_short	is_sec;
+	u_short	is_secmsk;
+	u_short	is_auth;
+	u_short	is_authmsk;
 	union {
 		icmpstate_t	is_ics;
 		tcpstate_t	is_ts;
@@ -120,14 +128,11 @@ extern	u_long	fr_tcptimeout;
 extern	u_long	fr_tcpclosed;
 extern	u_long	fr_udptimeout;
 extern	u_long	fr_icmptimeout;
-extern	int	fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *,
-			    tcphdr_t *, u_short));
-extern	ips_stat_t	*fr_statetstats __P((void));
+extern	int	fr_tcpstate __P((ipstate_t *, fr_info_t *, ip_t *, tcphdr_t *));
 extern	int	fr_addstate __P((ip_t *, fr_info_t *, u_int));
 extern	int	fr_checkstate __P((ip_t *, fr_info_t *));
 extern	void	fr_timeoutstate __P((void));
 extern	void	fr_tcp_age __P((u_long *, u_char *, ip_t *, fr_info_t *, int));
-extern	int	fr_state_flush __P((int));
 extern	void	fr_stateunload __P((void));
 extern	void	ipstate_log __P((struct ipstate *, u_short));
 #if defined(__NetBSD__) || defined(__OpenBSD__)
@@ -135,4 +140,5 @@ extern	int	fr_state_ioctl __P((caddr_t, u_long, int));
 #else
 extern	int	fr_state_ioctl __P((caddr_t, int, int));
 #endif
+
 #endif /* __IP_STATE_H__ */
diff --git a/sys/netinet/ipl.h b/sys/netinet/ipl.h
index 4ad6bd3..d92ec79 100644
--- a/sys/netinet/ipl.h
+++ b/sys/netinet/ipl.h
@@ -11,6 +11,6 @@
 #ifndef	__IPL_H__
 #define	__IPL_H__
 
-#define	IPL_VERSION	"IP Filter v3.2.3"
+#define	IPL_VERSION	"IP Filter v3.2.7"
 
 #endif
diff --git a/sys/netinet/mlf_ipl.c b/sys/netinet/mlf_ipl.c
index d6601ba..3cda6c1 100644
--- a/sys/netinet/mlf_ipl.c
+++ b/sys/netinet/mlf_ipl.c
@@ -27,6 +27,9 @@
 # include <sys/kernel.h>
 # ifdef DEVFS
 #  include <sys/devfsext.h>
+#  if defined(IPFILTER) && defined(_KERNEL)
+#   include "opt_devfs.h"
+#  endif
 # endif /*DEVFS*/
 #endif
 #include <sys/conf.h>
@@ -375,7 +378,8 @@ static void ipl_drvinit __P((void *unused))
 	}
 }
 
-# ifdef	IPFILTER_LKM
+# if defined(IPFILTER_LKM) || \
+     defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)
 SYSINIT(ipldev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ipl_drvinit,NULL)
 # endif /* IPFILTER_LKM */
 #endif /* _FreeBSD_version */