From 7595d5ffce4a14f32ac605d21cbd61fbe85057e2 Mon Sep 17 00:00:00 2001
From: darrenr <darrenr@FreeBSD.org>
Date: Thu, 26 Oct 2000 12:45:54 +0000
Subject: Import IP Filter 3.4.12

---
 contrib/ipfilter/BNF                        |   4 +-
 contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.0 |  61 ++
 contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.1 |  63 ++
 contrib/ipfilter/FreeBSD-4.0/kinstall       |   8 +-
 contrib/ipfilter/FreeBSD-4.0/unkinstall     |   3 +-
 contrib/ipfilter/HISTORY                    |  52 +-
 contrib/ipfilter/Makefile                   |  16 +-
 contrib/ipfilter/common.c                   |   2 +-
 contrib/ipfilter/fil.c                      |  61 +-
 contrib/ipfilter/ip_auth.h                  |   4 +-
 contrib/ipfilter/ip_compat.h                |  38 +-
 contrib/ipfilter/ip_fil.c                   |  39 +-
 contrib/ipfilter/ip_frag.c                  |  23 +-
 contrib/ipfilter/ip_frag.h                  |   4 +-
 contrib/ipfilter/ip_ftp_pxy.c               |  24 +-
 contrib/ipfilter/ip_nat.c                   | 439 ++++++++++--
 contrib/ipfilter/ip_nat.h                   |  14 +-
 contrib/ipfilter/ip_raudio_pxy.c            |   4 +-
 contrib/ipfilter/ip_sfil.c                  |  30 +-
 contrib/ipfilter/ip_state.c                 | 144 ++--
 contrib/ipfilter/ip_state.h                 |   3 +-
 contrib/ipfilter/ipf.c                      |  13 +-
 contrib/ipfilter/ipl.h                      |   4 +-
 contrib/ipfilter/ipmon.c                    |   4 +-
 contrib/ipfilter/ipsend/44arp.c             |   2 +-
 contrib/ipfilter/man/ipf.4                  |  30 +-
 contrib/ipfilter/man/ipf.5                  |   4 +-
 contrib/ipfilter/man/ipmon.8                |   2 +-
 contrib/ipfilter/man/ipnat.4                |   6 +-
 contrib/ipfilter/mlf_ipl.c                  |   2 +
 contrib/ipfilter/mlfk_ipl.c                 |   4 +-
 contrib/ipfilter/perl/plog                  | 998 ++++++++++++++++------------
 contrib/ipfilter/rules/BASIC.NAT            |  11 +-
 33 files changed, 1449 insertions(+), 667 deletions(-)
 create mode 100755 contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.0
 create mode 100644 contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.1

diff --git a/contrib/ipfilter/BNF b/contrib/ipfilter/BNF
index cfa5423..556171d 100644
--- a/contrib/ipfilter/BNF
+++ b/contrib/ipfilter/BNF
@@ -11,7 +11,7 @@ proto	= "proto" protocol .
 ip	= srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] .
 group	= [ "head" decnumber ] [ "group" decnumber ] .
 
-block	= "block" [ icmp [return-code] | "return-rst" ] .
+block	= "block" [ reutrn-icmp[return-code] | "return-rst" ] .
 auth	= "auth" | "preauth" .
 log	= "log" [ "body" ] [ "first" ] [ "or-block" ] [ "level" loglevel ] .
 call	= "call" [ "now" ] function-name .
@@ -22,7 +22,7 @@ protocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber .
 srcdst	= "all" | fromto .
 fromto	= "from" object "to" object .
 
-icmp	= "return-icmp" | "return-icmp-as-dest" .
+reutrn-icmp = "return-icmp" | "return-icmp-as-dest" .
 loglevel = facility"."priority | priority .
 object	= addr [ port-comp | port-range ] .
 addr	= "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] .
diff --git a/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.0 b/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.0
new file mode 100755
index 0000000..c232b2c
--- /dev/null
+++ b/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.0
@@ -0,0 +1,61 @@
+*** ip6_input.c.orig	Sun Feb 13 14:32:01 2000
+--- ip6_input.c	Wed Apr 26 22:31:34 2000
+***************
+*** 121,126 ****
+--- 121,127 ----
+  
+  extern struct	domain inet6domain;
+  extern struct	ip6protosw inet6sw[];
++ extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **));
+  
+  u_char	ip6_protox[IPPROTO_MAX];
+  static int	ip6qmaxlen = IFQ_MAXLEN;
+***************
+*** 302,307 ****
+--- 303,317 ----
+  		ip6stat.ip6s_badvers++;
+  		in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
+  		goto bad;
++ 	}
++ 
++ 	if (fr_checkp) {
++ 		struct	mbuf	*m1 = m;
++ 
++ 		if ((*fr_checkp)(ip6, sizeof(*ip6), m->m_pkthdr.rcvif,
++ 				 0, &m1) || !m1)
++ 			return;
++ 		ip6 = mtod(m = m1, struct ip6_hdr *);
+  	}
+  
+  	ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
+*** ip6_output.c.orig	Fri Mar 10 01:57:16 2000
+--- ip6_output.c	Wed Apr 26 22:34:34 2000
+***************
+*** 108,113 ****
+--- 108,115 ----
+  #include <netinet6/ip6_fw.h>
+  #endif
+  
++ extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **));
++ 
+  static MALLOC_DEFINE(M_IPMOPTS, "ip6_moptions", "internet multicast options");
+  
+  struct ip6_exthdrs {
+***************
+*** 754,759 ****
+--- 756,770 ----
+  			ip6->ip6_src.s6_addr16[1] = 0;
+  		if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
+  			ip6->ip6_dst.s6_addr16[1] = 0;
++ 	}
++ 
++ 	if (fr_checkp) {
++ 		struct  mbuf    *m1 = m;
++ 
++ 		if ((error = (*fr_checkp)(ip6, sizeof(*ip6), ifp, 1, &m1)) ||
++ 		    !m1)
++ 			goto done;
++ 		ip6 = mtod(m = m1, struct ip6_hdr *);
+  	}
+  
+  #ifdef IPV6FIREWALL
diff --git a/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.1 b/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.1
new file mode 100644
index 0000000..90dac19
--- /dev/null
+++ b/contrib/ipfilter/FreeBSD-4.0/ipv6-patch-4.1
@@ -0,0 +1,63 @@
+*** ip6_input.c.orig	Sat Jul 15 07:14:34 2000
+--- ip6_input.c	Thu Oct 19 17:14:37 2000
+***************
+*** 120,125 ****
+--- 120,127 ----
+  
+  extern struct domain inet6domain;
+  extern struct ip6protosw inet6sw[];
++ extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int,
++ 			     struct mbuf **));
+  
+  u_char ip6_protox[IPPROTO_MAX];
+  static int ip6qmaxlen = IFQ_MAXLEN;
+***************
+*** 289,294 ****
+--- 291,305 ----
+  		ip6stat.ip6s_badvers++;
+  		in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
+  		goto bad;
++ 	}
++ 
++ 	if (fr_checkp) {
++ 		struct	mbuf	*m1 = m;
++ 
++ 		if ((*fr_checkp)(ip6, sizeof(*ip6), m->m_pkthdr.rcvif,
++ 				 0, &m1) || !m1)
++ 			return;
++ 		ip6 = mtod(m = m1, struct ip6_hdr *);
+  	}
+  
+  	ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
+
+*** ip6_output.c.orig	Sat Jul 15 07:14:35 2000
+--- ip6_output.c	Thu Oct 19 17:13:53 2000
+***************
+*** 106,111 ****
+--- 106,113 ----
+  #include <netinet6/ip6_fw.h>
+  #endif
+  
++ extern int (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **));
++ 
+  static MALLOC_DEFINE(M_IPMOPTS, "ip6_moptions", "internet multicast options");
+  
+  struct ip6_exthdrs {
+***************
+*** 787,792 ****
+--- 789,803 ----
+  			ip6->ip6_src.s6_addr16[1] = 0;
+  		if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
+  			ip6->ip6_dst.s6_addr16[1] = 0;
++ 	}
++ 
++ 	if (fr_checkp) {
++ 		struct  mbuf    *m1 = m;
++ 
++ 		if ((error = (*fr_checkp)(ip6, sizeof(*ip6), ifp, 1, &m1)) ||
++ 		    !m1)
++ 			goto done;
++ 		ip6 = mtod(m = m1, struct ip6_hdr *);
+  	}
+  
+  #ifdef IPV6FIREWALL
diff --git a/contrib/ipfilter/FreeBSD-4.0/kinstall b/contrib/ipfilter/FreeBSD-4.0/kinstall
index cb3c3da..7e663d2 100755
--- a/contrib/ipfilter/FreeBSD-4.0/kinstall
+++ b/contrib/ipfilter/FreeBSD-4.0/kinstall
@@ -2,6 +2,7 @@
 #
 set dir=`pwd`
 set karch=`uname -m`
+set krev=`uname -r|sed -e 's/\([0-9\.]*\)-.*/\1/'`
 if ( -d /sys/arch/$karch ) set archdir="/sys/arch/$karch"
 if ( -d /sys/$karch ) set archdir="/sys/$karch"
 set confdir="$archdir/conf"
@@ -21,7 +22,7 @@ ln -s /usr/include/osreldate.h /sys/sys/osreldate.h
 
 echo ""
 echo "Patching ip6_input.c and ip6_output.c"
-cat FreeBSD-4.0/ipv6-patch | (cd /sys/netinet6; patch)
+cat FreeBSD-4.0/ipv6-patch-$krev | (cd /sys/netinet6; patch)
 
 set config=`(cd $confdir; /bin/ls -1t [0-9A-Z_]*) | head -1`
 echo -n "Kernel configuration to update [$config] "
@@ -31,6 +32,11 @@ if ( "$newconfig" != "" ) then
 else
 	set newconfig=$config
 endif
+grep -q IPFILTER $confdir/$newconfig
+if ($status == 0) then
+	echo "IPFilter already configured in kernel config file"
+	exit 0
+endif
 echo "Rewriting $newconfig..."
 if ( -f $confdir/$newconfig ) then
 	mv $confdir/$newconfig $confdir/$newconfig.bak
diff --git a/contrib/ipfilter/FreeBSD-4.0/unkinstall b/contrib/ipfilter/FreeBSD-4.0/unkinstall
index d43ac4a..4e9caaa 100755
--- a/contrib/ipfilter/FreeBSD-4.0/unkinstall
+++ b/contrib/ipfilter/FreeBSD-4.0/unkinstall
@@ -3,6 +3,7 @@
 #
 set dir=`pwd`
 set karch=`uname -m`
+set krev=`uname -r|sed -e 's/\([0-9\.]*\)-.*/\1/'`
 if ( -d /sys/arch/$karch ) set archdir="/sys/arch/$karch"
 if ( -d /sys/$karch ) set archdir="/sys/$karch"
 set confdir="$archdir/conf"
@@ -21,7 +22,7 @@ echo "Removing link from /usr/include/osreldate.h to /sys/sys/osreldate.h"
 rm /sys/sys/osreldate.h
 
 echo "Removing patch to ip6_input.c and ip6_output.c"
-cat FreeBSD-4.0/ipv6-patch | (cd /sys/netinet6; patch -R)
+cat FreeBSD-4.0/ipv6-patch-$krev | (cd /sys/netinet6; patch -R)
 
 set config=`(cd $confdir; /bin/ls -1t [0-9A-Z_]*) | head -1`
 echo -n "Kernel configuration to update [$config] "
diff --git a/contrib/ipfilter/HISTORY b/contrib/ipfilter/HISTORY
index da1594d..09f21ee 100644
--- a/contrib/ipfilter/HISTORY
+++ b/contrib/ipfilter/HISTORY
@@ -6,9 +6,11 @@
 # in providing a very available location for the IP Filter home page and
 # distribution center.
 #
-# Thanks to Tel.Net Media for allowing me to maintain and further develop
-# IP Filter as part of my job and supplying Sun equipment for testing the
-# move to 64bits and Gigabit Ethernet.
+# Thanks to Hewlett Packard for making it possible to port IP Filter to
+# HP-UX 11.00.
+#
+# Thanks to Tel.Net Media for supplying me with equipment to ensure that
+# IP Filter continues to work on Solaris/sparc64.
 #
 # Thanks to BSDI for providing object files for BSD/OS 3.1 and the means
 # to further support development of IP Filter under BSDI.
@@ -20,6 +22,50 @@
 # and especially those who have found the time to port IP Filter to new
 # platforms.
 #
+3.4.12	26/10/2000 - Released
+
+fix installing into FreeBSD-4.1
+
+fix FTP proxy bug where it'd hang and make NAT slightly more efficient
+
+fix general compiling errors/warnings on various platforms
+
+don't access ICMP data fields that aren't there
+
+3.4.11	09/10/2000 - Released
+
+return NULL for IPv6 access control lists if it is disabled rather than
+random garbage.
+
+fix for getting protocol & packet length for IPv6 packets for pullup.
+
+update plog script from version 0.8 to version 0.10
+
+patch from Frank Volf adding fix_datacksum() to NAT code, enhancing the
+capabilities for "fixing" checksums.
+
+3.4.10	03/09/2000 - Released
+
+merge patch from Frank Volf for ICMP nat handling of TCP/UDP data `errors'
+
+getline() adjusts linenum now
+
+add tcphalfclosed timeout
+
+fill in icmp_nextmtu field if it is defined on the platform
+
+RST generation fix from guido
+
+force 32bit compile for gcc on solaris if it can't generate 64bit code
+
+encase logging when fr_chksrc == 2 in #ifdef IPFILTER_LOG
+
+fix up line wrap problems in plog script
+
+fix ICMP packet handling to not drop valid ICMP errors
+
+freebsd 5.0 compat changes
+
 3.4.9	08/08/2000 - Released
 
 implement new aging mechanism in fr_tcp_age()
diff --git a/contrib/ipfilter/Makefile b/contrib/ipfilter/Makefile
index 947c3b6..e79eb12 100644
--- a/contrib/ipfilter/Makefile
+++ b/contrib/ipfilter/Makefile
@@ -5,7 +5,7 @@
 # provided that this notice is preserved and due credit is given
 # to the original author and the contributors.
 #
-# $Id: Makefile,v 2.11.2.3 2000/08/05 14:50:00 darrenr Exp $
+# $Id: Makefile,v 2.11.2.4 2000/10/19 15:42:56 darrenr Exp $
 #
 BINDEST=/usr/local/bin
 SBINDEST=/sbin
@@ -16,7 +16,7 @@ CC=gcc -Wstrict-prototypes -Wmissing-prototypes
 #CC=cc -Dconst=
 DEBUG=-g
 TOP=../..
-CFLAGS=-I$$(TOP) -g
+CFLAGS=-I$$(TOP)
 CPU=`uname -m`
 CPUDIR=`uname -s|sed -e 's@/@@g'`-`uname -r`-`uname -m`
 #
@@ -169,8 +169,8 @@ bsdi bsdos: include
 
 irix IRIX: include
 	make setup "TARGOS=IRIX" "CPUDIR=$(CPUDIR)"
-	(cd IRIX/$(CPUDIR); smake build TOP=../.. $(DEST) $(MFLAGS); cd ..)
-	(cd IRIX/$(CPUDIR); make -f Makefile.ipsend TOP=../.. $(DEST) $(MFLAGS); cd ..)
+	-(SMAKE=`which smake >/dev/null 2>&1; if [ $$? -ne 0 ] ; then echo make -f Makefile.std; else echo smake; fi`; cd IRIX/$(CPUDIR); $${SMAKE} build TOP=../.. $(DEST) $(MFLAGS); cd ..)
+	-(SMAKE=`which smake >/dev/null 2>&1; if [ $$? -ne 0 ] ; then echo make -f Makefile.ipsend.std; else echo smake -f Makefile.ipsend; fi`; cd IRIX/$(CPUDIR); $${SMAKE} TOP=../.. $(DEST) $(MFLAGS); cd ..)
 
 linux: include
 	make setup "TARGOS=Linux" "CPUDIR=$(CPUDIR)"
@@ -184,6 +184,14 @@ setup:
 	-if [ ! -d $(TARGOS)/$(CPUDIR) ] ; then mkdir $(TARGOS)/$(CPUDIR); fi
 	-rm -f $(TARGOS)/$(CPUDIR)/Makefile $(TARGOS)/$(CPUDIR)/Makefile.ipsend
 	-ln -s ../Makefile $(TARGOS)/$(CPUDIR)/Makefile
+	-if [ ! -f $(TARGOS)/$(CPUDIR)/Makefile.std -a \
+		-f $(TARGOS)/Makefile.std ] ; then \
+	    ln -s ../Makefile.std $(TARGOS)/$(CPUDIR)/Makefile.std; \
+	 fi
+	-if [ ! -f $(TARGOS)/$(CPUDIR)/Makefile.ipsend.std -a \
+		-f $(TARGOS)/Makefile.ipsend.std ] ; then \
+	    ln -s ../Makefile.ipsend.std $(TARGOS)/$(CPUDIR)/Makefile.ipsend.std; \
+	 fi
 	-ln -s ../Makefile.ipsend $(TARGOS)/$(CPUDIR)/Makefile.ipsend
 
 clean: clean-include
diff --git a/contrib/ipfilter/common.c b/contrib/ipfilter/common.c
index 935f3fb..d7706bd 100644
--- a/contrib/ipfilter/common.c
+++ b/contrib/ipfilter/common.c
@@ -274,7 +274,7 @@ int     linenum;
 		return 0;
 	if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) {
 		(*seg)++;
-		if (isdigit(***seg) && *(*seg + 2)) {
+		if (isalnum(***seg) && *(*seg + 2)) {
 			if (portnum(**seg, pp, linenum) == 0)
 				return -1;
 			(*seg)++;
diff --git a/contrib/ipfilter/fil.c b/contrib/ipfilter/fil.c
index 91b5108..b85dcf4 100644
--- a/contrib/ipfilter/fil.c
+++ b/contrib/ipfilter/fil.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)fil.c	1.36 6/5/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: fil.c,v 2.35.2.20 2000/08/13 04:15:43 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: fil.c,v 2.35.2.26 2000/10/24 11:58:17 darrenr Exp $";
 #endif
 
 #include <sys/errno.h>
@@ -274,6 +274,16 @@ fr_info_t *fin;
 		int minicmpsz = sizeof(struct icmp);
 		icmphdr_t *icmp;
 
+		if (fin->fin_dlen > 1)
+			fin->fin_data[0] = *(u_short *)tcp;
+
+		if ((!(plen >= hlen + minicmpsz) && !off) ||
+		    (off && off < sizeof(struct icmp))) {
+			fi->fi_fl |= FI_SHORT;
+			if (fin->fin_dlen < 2)
+				break;
+		}
+
 		icmp = (icmphdr_t *)tcp;
 
 		if (!off && (icmp->icmp_type == ICMP_ECHOREPLY ||
@@ -291,11 +301,6 @@ fr_info_t *fin;
 		    icmp->icmp_type == ICMP_MASKREPLY))
 			minicmpsz = 12;
 
-		if ((!(plen >= 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 :
@@ -740,6 +745,7 @@ int out;
 
 #ifdef	_KERNEL
 	mb_t *mc = NULL;
+	int p, len;
 # if !defined(__SVR4) && !defined(__svr4__)
 #  ifdef __sgi
 	char hbuf[(0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8];
@@ -764,13 +770,26 @@ int out;
 	}
 #  endif /* CSUM_DELAY_DATA */
 
+# ifdef	USE_INET6
+	if (v == 6) {
+		len = ntohs(((ip6_t*)ip)->ip6_plen);
+		p = ((ip6_t *)ip)->ip6_nxt;
+	} else
+# endif
+	{
+		p = ip->ip_p;
+		len = ip->ip_len;
+	}
 
-	if ((ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP ||
-	     ip->ip_p == IPPROTO_ICMP)) {
+	if ((p == IPPROTO_TCP || p == IPPROTO_UDP || p == IPPROTO_ICMP
+# ifdef USE_INET6
+	    || (v == 6 && p == IPPROTO_ICMPV6)
+# endif
+	   )) {
 		int plen = 0;
 
-		if ((ip->ip_off & IP_OFFMASK) == 0)
-			switch(ip->ip_p)
+		if ((v == 6) || (ip->ip_off & IP_OFFMASK) == 0)
+			switch(p)
 			{
 			case IPPROTO_TCP:
 				plen = sizeof(tcphdr_t);
@@ -780,10 +799,13 @@ int out;
 				break;
 			/* 96 - enough for complete ICMP error IP header */
 			case IPPROTO_ICMP:
+# ifdef USE_INET6
+	    		case IPPROTO_ICMPV6 :
+# endif
 				plen = ICMPERR_MAXPKTLEN - sizeof(ip_t);
 				break;
 			}
-		up = MIN(hlen + plen, ip->ip_len);
+		up = MIN(hlen + plen, len);
 
 		if (up > m->m_len) {
 #  ifdef __sgi
@@ -830,8 +852,8 @@ int out;
 		ip->ip_id = ntohs(ip->ip_id);
 
 	changed = 0;
-	fin->fin_v = v;
 	fin->fin_ifp = ifp;
+	fin->fin_v = v;
 	fin->fin_out = out;
 	fin->fin_mp = mp;
 	fr_makefrip(hlen, ip, fin);
@@ -1376,7 +1398,7 @@ nodata:
  * SUCH DAMAGE.
  *
  *	@(#)uipc_mbuf.c	8.2 (Berkeley) 1/4/94
- * $Id: fil.c,v 2.35.2.20 2000/08/13 04:15:43 darrenr Exp $
+ * $Id: fil.c,v 2.35.2.26 2000/10/24 11:58:17 darrenr Exp $
  */
 /*
  * Copy data from an mbuf chain starting "off" bytes from the beginning,
@@ -1855,7 +1877,7 @@ size_t c;
 	int err;
 
 #if SOLARIS
-	if (copyin(a, &ca, sizeof(ca)))
+	if (copyin(a, (char *)&ca, sizeof(ca)))
 		return EFAULT;
 #else
 	bcopy(a, &ca, sizeof(ca));
@@ -1875,7 +1897,7 @@ size_t c;
 	int err;
 
 #if SOLARIS
-	if (copyin(b, &ca, sizeof(ca)))
+	if (copyin(b, (char *)&ca, sizeof(ca)))
 		return EFAULT;
 #else
 	bcopy(b, &ca, sizeof(ca));
@@ -1969,6 +1991,15 @@ friostat_t *fiop;
 	fiop->f_acctin6[1] = ipacct6[0][1];
 	fiop->f_acctout6[0] = ipacct6[1][0];
 	fiop->f_acctout6[1] = ipacct6[1][1];
+#else
+	fiop->f_fin6[0] = NULL;
+	fiop->f_fin6[1] = NULL;
+	fiop->f_fout6[0] = NULL;
+	fiop->f_fout6[1] = NULL;
+	fiop->f_acctin6[0] = NULL;
+	fiop->f_acctin6[1] = NULL;
+	fiop->f_acctout6[0] = NULL;
+	fiop->f_acctout6[1] = NULL;
 #endif
 	fiop->f_active = fr_active;
 	fiop->f_froute[0] = ipl_frouteok[0];
diff --git a/contrib/ipfilter/ip_auth.h b/contrib/ipfilter/ip_auth.h
index b543318..681a6e5 100644
--- a/contrib/ipfilter/ip_auth.h
+++ b/contrib/ipfilter/ip_auth.h
@@ -5,7 +5,7 @@
  * provided that this notice is preserved and due credit is given
  * to the original author and the contributors.
  *
- * $Id: ip_auth.h,v 2.3.2.1 2000/05/22 10:26:11 darrenr Exp $
+ * $Id: ip_auth.h,v 2.3.2.2 2000/10/19 15:38:44 darrenr Exp $
  *
  */
 #ifndef	__IP_AUTH_H__
@@ -46,8 +46,6 @@ typedef struct  fr_authstat {
 extern	frentry_t	*ipauth;
 extern	struct fr_authstat	fr_authstats;
 extern	int	fr_defaultauthage;
-extern	int	fr_authstart;
-extern	int	fr_authend;
 extern	int	fr_authsize;
 extern	int	fr_authused;
 extern	int	fr_auth_lock;
diff --git a/contrib/ipfilter/ip_compat.h b/contrib/ipfilter/ip_compat.h
index ba9e014..2369cf0 100644
--- a/contrib/ipfilter/ip_compat.h
+++ b/contrib/ipfilter/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 2.26.2.4 2000/08/13 03:51:03 darrenr Exp $
+ * $Id: ip_compat.h,v 2.26.2.6 2000/10/19 15:39:05 darrenr Exp $
  */
 
 #ifndef	__IP_COMPAT_H__
@@ -263,6 +263,12 @@ union	i6addr	{
 
 
 #if defined(__FreeBSD__) && (defined(KERNEL) || defined(_KERNEL))
+# ifdef IPFILTER_LKM
+#  include <osreldate.h>
+#  define       ACTUALLY_LKM_NOT_KERNEL
+# else
+#  include <sys/osreldate.h>
+# endif
 # if __FreeBSD__ < 3
 #  include <machine/spl.h>
 # else
@@ -288,6 +294,19 @@ union	i6addr	{
 # define	ATOMIC_DEC32		ATOMIC_DEC
 # define	ATOMIC_DEC16		ATOMIC_DEC
 #endif
+#ifdef __sgi
+# define  hz HZ
+# include <sys/ksynch.h>
+# define	IPF_LOCK_PL	plhi
+# include <sys/sema.h>
+#undef kmutex_t
+typedef struct {
+	lock_t *l;
+	int pl;
+} kmutex_t;
+# undef	MUTEX_INIT
+# undef	MUTEX_DESTROY
+#endif
 #ifdef KERNEL
 # if SOLARIS
 #  if SOLARIS2 >= 6
@@ -337,8 +356,8 @@ union	i6addr	{
 #  define	MUTEX_DESTROY(x)	mutex_destroy(x)
 #  define	MUTEX_EXIT(x)	mutex_exit(x)
 #  define	MTOD(m,t)	(t)((m)->b_rptr)
-#  define	IRCOPY(a,b,c)	copyin((a), (b), (c))
-#  define	IWCOPY(a,b,c)	copyout((a), (b), (c))
+#  define	IRCOPY(a,b,c)	copyin((caddr_t)(a), (caddr_t)(b), (c))
+#  define	IWCOPY(a,b,c)	copyout((caddr_t)(a), (caddr_t)(b), (c))
 #  define	IRCOPYPTR	ircopyptr
 #  define	IWCOPYPTR	iwcopyptr
 #  define	FREE_MB_T(m)	freemsg(m)
@@ -383,15 +402,6 @@ extern	ill_t	*get_unit __P((char *, int));
 #  define	IFNAME(x)	((ill_t *)x)->ill_name
 # else /* SOLARIS */
 #  if defined(__sgi)
-#   define  hz HZ
-#   include <sys/ksynch.h>
-#   define	IPF_LOCK_PL	plhi
-#   include <sys/sema.h>
-#undef kmutex_t
-typedef struct {
-	lock_t *l;
-	int pl;
-} kmutex_t;
 #   define	ATOMIC_INC(x)		{ MUTEX_ENTER(&ipf_rw); \
 					  (x)++; MUTEX_EXIT(&ipf_rw); }
 #   define	ATOMIC_DEC(x)		{ MUTEX_ENTER(&ipf_rw); \
@@ -404,8 +414,8 @@ typedef struct {
 #   define	MUTEX_DOWNGRADE(x)	;
 #   define	RWLOCK_EXIT(x)		MUTEX_EXIT(x)
 #   define	MUTEX_EXIT(x)		UNLOCK((x)->l, (x)->pl);
-#   define	MUTEX_INIT(x,y,z)	(x).l = LOCK_ALLOC((uchar_t)-1, IPF_LOCK_PL, (lkinfo_t *)-1, KM_NOSLEEP)
-#   define	MUTEX_DESTROY(x)	LOCK_DEALLOC((x).l)
+#   define	MUTEX_INIT(x,y,z)	(x)->l = LOCK_ALLOC((uchar_t)-1, IPF_LOCK_PL, (lkinfo_t *)-1, KM_NOSLEEP)
+#   define	MUTEX_DESTROY(x)	LOCK_DEALLOC((x)->l)
 #  else /* __sgi */
 #   define	ATOMIC_INC(x)		(x)++
 #   define	ATOMIC_DEC(x)		(x)--
diff --git a/contrib/ipfilter/ip_fil.c b/contrib/ipfilter/ip_fil.c
index 2e8af26..9253775 100644
--- a/contrib/ipfilter/ip_fil.c
+++ b/contrib/ipfilter/ip_fil.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_fil.c	2.41 6/5/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_fil.c,v 2.42.2.15 2000/08/05 14:49:08 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_fil.c,v 2.42.2.17 2000/10/19 15:39:42 darrenr Exp $";
 #endif
 
 #ifndef	SOLARIS
@@ -171,6 +171,9 @@ struct callout_handle ipfr_slowtimer_ch;
 # include <sys/callout.h>
 struct callout ipfr_slowtimer_ch;
 #endif
+#if defined(__sgi) && defined(_KERNEL)
+toid_t ipfr_slowtimer_ch;
+#endif
 
 #if (_BSDI_VERSION >= 199510) && defined(_KERNEL)
 # include <sys/device.h>
@@ -318,7 +321,7 @@ pfil_error:
 	callout_init(&ipfr_slowtimer_ch);
 	callout_reset(&ipfr_slowtimer_ch, hz / 2, ipfr_slowtimer, NULL);
 # else
-#  if (__FreeBSD_version >= 300000) && defined(_KERNEL)
+#  if (__FreeBSD_version >= 300000) || defined(__sgi)
 	ipfr_slowtimer_ch = timeout(ipfr_slowtimer, NULL, hz/2);
 #  else
 	timeout(ipfr_slowtimer, NULL, hz/2);
@@ -348,7 +351,7 @@ int ipldetach()
 	untimeout(ipfr_slowtimer, NULL, ipfr_slowtimer_ch);
 #  else
 #  ifdef __sgi
-	untimeout(ipfr_slowtimer);
+	untimeout(ipfr_slowtimer_ch);
 #   else
 	untimeout(ipfr_slowtimer, NULL);
 #   endif
@@ -975,8 +978,10 @@ fr_info_t *fin;
 	if (m == NULL)
 		return -1;
 
-	if (tcp->th_flags & TH_SYN)
-		tlen = 1;
+	tlen = oip->ip_len - fin->fin_hlen - (tcp->th_off << 2) +
+			((tcp->th_flags & TH_SYN) ? 1 : 0) +
+			((tcp->th_flags & TH_FIN) ? 1 : 0);
+
 #ifdef	USE_INET6
 	hlen = (fin->fin_v == 6) ? sizeof(ip6_t) : sizeof(ip_t);
 #else
@@ -997,11 +1002,16 @@ fr_info_t *fin;
 
 	tcp2->th_sport = tcp->th_dport;
 	tcp2->th_dport = tcp->th_sport;
-	tcp2->th_ack = ntohl(tcp->th_seq);
-	tcp2->th_ack += tlen;
-	tcp2->th_ack = htonl(tcp2->th_ack);
+	if (tcp->th_flags & TH_ACK) {
+		tcp2->th_seq = tcp->th_ack;
+		tcp2->th_flags = TH_RST;
+	} else {
+		tcp2->th_ack = ntohl(tcp->th_seq);
+		tcp2->th_ack += tlen;
+		tcp2->th_ack = htonl(tcp2->th_ack);
+		tcp2->th_flags = TH_RST|TH_ACK;
+	}
 	tcp2->th_off = sizeof(*tcp2) >> 2;
-	tcp2->th_flags = TH_RST|TH_ACK;
 # ifdef	USE_INET6
 	if (fin->fin_v == 6) {
 		ip6->ip6_plen = htons(sizeof(struct tcphdr));
@@ -1143,7 +1153,12 @@ int dst;
 			m_freem(m);
 			return ENOBUFS;
 		}
+# ifdef	M_TRAILINGSPACE
+		m->m_len = 0;
+		avail = M_TRAILINGSPACE(m);
+# else
 		avail = (m->m_flags & M_EXT) ? MCLBYTES : MHLEN;
+# endif
 		xtra = MIN(ntohs(oip6->ip6_plen) + sizeof(ip6_t),
 			   avail - hlen - sizeof(*icmp) - max_linkhdr);
 		if (dst == 0) {
@@ -1177,6 +1192,12 @@ int dst;
 	icmp->icmp_type = type;
 	icmp->icmp_code = fin->fin_icode;
 	icmp->icmp_cksum = 0;
+#ifdef	icmp_nextmtu
+	if (type == ICMP_UNREACH &&
+	    fin->fin_icode == ICMP_UNREACH_NEEDFRAG && ifp)
+		icmp->icmp_nextmtu = htons(((struct ifnet *) ifp)->if_mtu);
+#endif
+
 	if (avail) {
 		bcopy((char *)oip, (char *)&icmp->icmp_ip, MIN(ohlen, avail));
 		avail -= MIN(ohlen, avail);
diff --git a/contrib/ipfilter/ip_frag.c b/contrib/ipfilter/ip_frag.c
index 5019c60..1cb86c1 100644
--- a/contrib/ipfilter/ip_frag.c
+++ b/contrib/ipfilter/ip_frag.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_frag.c	1.11 3/24/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_frag.c,v 2.10.2.4 2000/06/06 15:49:15 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_frag.c,v 2.10.2.5 2000/10/19 15:39:58 darrenr Exp $";
 #endif
 
 #if defined(KERNEL) && !defined(_KERNEL)
@@ -214,7 +214,7 @@ u_int pass;
 	ipfr_t	*ipf;
 
 	if ((ip->ip_v != 4) || (fr_frag_lock))
-		return NULL;
+		return -1;
 	WRITE_ENTER(&ipf_frag);
 	ipf = ipfr_new(ip, fin, pass, ipfr_heads);
 	RWLOCK_EXIT(&ipf_frag);
@@ -231,7 +231,7 @@ nat_t *nat;
 	ipfr_t	*ipf;
 
 	if ((ip->ip_v != 4) || (fr_frag_lock))
-		return NULL;
+		return -1;
 	WRITE_ENTER(&ipf_natfrag);
 	ipf = ipfr_new(ip, fin, pass, ipfr_nattab);
 	if (ipf != NULL) {
@@ -328,13 +328,16 @@ fr_info_t *fin;
 	ipf = ipfr_lookup(ip, fin, ipfr_nattab);
 	if (ipf != NULL) {
 		nat = ipf->ipfr_data;
-		/*
-		 * This is the last fragment for this packet.
-		 */
-		if ((ipf->ipfr_ttl == 1) && (nat != NULL)) {
-			nat->nat_data = NULL;
-			ipf->ipfr_data = NULL;
-		}
+		if (nat->nat_ifp == fin->fin_ifp) {
+			/*
+			 * This is the last fragment for this packet.
+			 */
+			if ((ipf->ipfr_ttl == 1) && (nat != NULL)) {
+				nat->nat_data = NULL;
+				ipf->ipfr_data = NULL;
+			}
+		} else
+			nat = NULL;
 	} else
 		nat = NULL;
 	RWLOCK_EXIT(&ipf_natfrag);
diff --git a/contrib/ipfilter/ip_frag.h b/contrib/ipfilter/ip_frag.h
index 6a3bd2c..61b88aa 100644
--- a/contrib/ipfilter/ip_frag.h
+++ b/contrib/ipfilter/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 2.4 2000/03/13 22:10:21 darrenr Exp $
+ * $Id: ip_frag.h,v 2.4.2.1 2000/10/19 15:40:13 darrenr Exp $
  */
 
 #ifndef	__IP_FRAG_H__
@@ -60,6 +60,6 @@ extern	void	ipfr_slowtimer __P((void *));
 # endif
 #else
 extern	int	ipfr_slowtimer __P((void));
-#endif
+#endif /* (BSD >= 199306) || SOLARIS */
 
 #endif	/* __IP_FIL_H__ */
diff --git a/contrib/ipfilter/ip_ftp_pxy.c b/contrib/ipfilter/ip_ftp_pxy.c
index 84dc8b9..ffa7c1b 100644
--- a/contrib/ipfilter/ip_ftp_pxy.c
+++ b/contrib/ipfilter/ip_ftp_pxy.c
@@ -2,7 +2,7 @@
  * Simple FTP transparent proxy for in-kernel use.  For use with the NAT
  * code.
  *
- * $Id: ip_ftp_pxy.c,v 2.7.2.13 2000/08/07 12:35:27 darrenr Exp $
+ * $Id: ip_ftp_pxy.c,v 2.7.2.17 2000/10/19 15:40:40 darrenr Exp $
  */
 #if SOLARIS && defined(_KERNEL)
 extern	kmutex_t	ipf_rw;
@@ -146,6 +146,7 @@ int dlen;
 	} else
 		return 0;
 	a5 >>= 8;
+	a5 &= 0xff;
 	/*
 	 * Calculate new address parts for PORT command
 	 */
@@ -214,7 +215,7 @@ int dlen;
 		sum2 -= sum1;
 		sum2 = (sum2 & 0xffff) + (sum2 >> 16);
 
-		fix_outcksum(&ip->ip_sum, sum2, 0);
+		fix_outcksum(&ip->ip_sum, sum2);
 #endif
 		ip->ip_len += inc;
 	}
@@ -441,7 +442,7 @@ int dlen;
 		sum2 -= sum1;
 		sum2 = (sum2 & 0xffff) + (sum2 >> 16);
 
-		fix_outcksum(&ip->ip_sum, sum2, 0);
+		fix_outcksum(&ip->ip_sum, sum2);
 #endif /* SOLARIS || defined(__sgi) */
 		ip->ip_len += inc;
 	}
@@ -670,15 +671,18 @@ int rv;
 			while ((rptr < wptr) && (*rptr != '\r'))
 				rptr++;
 
-			if ((*rptr == '\r') && (rptr + 1 < wptr)) {
-				if (*(rptr + 1) == '\n') {
-					rptr += 2;
-					f->ftps_junk = 0;
+			if (*rptr == '\r') {
+				if (rptr + 1 < wptr) {
+					if (*(rptr + 1) == '\n') {
+						rptr += 2;
+						f->ftps_junk = 0;
+					} else
+						rptr++;
 				} else
-					rptr++;
+					break;
 			}
-			f->ftps_rptr = rptr;
 		}
+		f->ftps_rptr = rptr;
 
 		if (rptr == wptr) {
 			rptr = wptr = f->ftps_buf;
@@ -762,5 +766,7 @@ char **ptr;
 		j += c - '0';
 	}
 	*ptr = s;
+	i &= 0xff;
+	j &= 0xff;
 	return (i << 8) | j;
 }
diff --git a/contrib/ipfilter/ip_nat.c b/contrib/ipfilter/ip_nat.c
index bbcff77..d52f48d 100644
--- a/contrib/ipfilter/ip_nat.c
+++ b/contrib/ipfilter/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 2.37.2.21 2000/08/12 07:32:40 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_nat.c,v 2.37.2.25 2000/10/25 10:38:47 darrenr Exp $";
 #endif
 
 #if defined(__FreeBSD__) && defined(KERNEL) && !defined(_KERNEL)
@@ -118,6 +118,7 @@ u_int	ipf_nattable_sz = NAT_TABLE_SZ;
 u_int	ipf_natrules_sz = NAT_SIZE;
 u_int	ipf_rdrrules_sz = RDR_SIZE;
 u_int	ipf_hostmap_sz = HOSTMAP_SIZE;
+int	nat_wilds = 0;
 u_32_t	nat_masks = 0;
 u_32_t	rdr_masks = 0;
 ipnat_t	**nat_rules = NULL;
@@ -143,6 +144,7 @@ static	void	nat_delnat __P((struct ipnat *));
 static	int	fr_natgetent __P((caddr_t));
 static	int	fr_natgetsz __P((caddr_t));
 static	int	fr_natputent __P((caddr_t));
+static	void	nat_tabmove __P((nat_t *, u_int));
 static	int	nat_match __P((fr_info_t *, ipnat_t *, ip_t *));
 static	hostmap_t *nat_hostmap __P((ipnat_t *, struct in_addr,
 				    struct in_addr));
@@ -300,10 +302,9 @@ struct hostmap *hm;
 }
 
 
-void fix_outcksum(sp, n , len)
+void fix_outcksum(sp, n)
 u_short *sp;
 u_32_t n;
-int len;
 {
 	register u_short sumshort;
 	register u_32_t sum1;
@@ -326,10 +327,9 @@ int len;
 }
 
 
-void fix_incksum(sp, n , len)
+void fix_incksum(sp, n)
 u_short *sp;
 u_32_t n;
-int len;
 {
 	register u_short sumshort;
 	register u_32_t sum1;
@@ -357,6 +357,38 @@ int len;
 
 
 /*
+ * fix_datacksum is used *only* for the adjustments of checksums in the data
+ * section of an IP packet.
+ *
+ * The only situation in which you need to do this is when NAT'ing an 
+ * ICMP error message. Such a message, contains in its body the IP header
+ * of the original IP packet, that causes the error.
+ *
+ * You can't use fix_incksum or fix_outcksum in that case, because for the
+ * kernel the data section of the ICMP error is just data, and no special 
+ * processing like hardware cksum or ntohs processing have been done by the 
+ * kernel on the data section.
+ */
+void fix_datacksum(sp, n)
+u_short *sp;
+u_32_t n;
+{
+	register u_short sumshort;
+	register u_32_t sum1;
+
+	if (!n)
+		return;
+
+	sum1 = (~ntohs(*sp)) & 0xffff;
+	sum1 += (n);
+	sum1 = (sum1 >> 16) + (sum1 & 0xffff);
+	/* Again */
+	sum1 = (sum1 >> 16) + (sum1 & 0xffff);
+	sumshort = ~(u_short)sum1;
+	*(sp) = htons(sumshort);
+}
+
+/*
  * How the NAT is organised and works.
  *
  * Inside (interface y) NAT       Outside (interface x)
@@ -856,8 +888,8 @@ caddr_t data;
 	/*
 	 * Initialize all these so that nat_delete() doesn't cause a crash.
 	 */
-	nat->nat_hstart[0] = NULL;
-	nat->nat_hstart[1] = NULL;
+	nat->nat_phnext[0] = NULL;
+	nat->nat_phnext[1] = NULL;
 	fr = nat->nat_fr;
 	nat->nat_fr = NULL;
 	aps = nat->nat_aps;
@@ -969,22 +1001,16 @@ junkput:
 static void nat_delete(natd)
 struct nat *natd;
 {
-	register struct nat **natp, *nat;
 	struct ipnat *ipn;
 
-	for (natp = natd->nat_hstart[0]; natp && (nat = *natp);
-	     natp = &nat->nat_hnext[0])
-		if (nat == natd) {
-			*natp = nat->nat_hnext[0];
-			break;
-		}
-
-	for (natp = natd->nat_hstart[1]; natp && (nat = *natp);
-	     natp = &nat->nat_hnext[1])
-		if (nat == natd) {
-			*natp = nat->nat_hnext[1];
-			break;
-		}
+	if (natd->nat_flags & FI_WILDP)
+		nat_wilds--;
+	if (natd->nat_hnext[0])
+		natd->nat_hnext[0]->nat_phnext[0] = natd->nat_phnext[0];
+	*natd->nat_phnext[0] = natd->nat_hnext[0];
+	if (natd->nat_hnext[1])
+		natd->nat_hnext[1]->nat_phnext[1] = natd->nat_phnext[1];
+	*natd->nat_phnext[1] = natd->nat_hnext[1];
 
 	if (natd->nat_fr != NULL) {
 		ATOMIC_DEC32(natd->nat_fr->fr_ref);
@@ -1029,7 +1055,7 @@ static int nat_flushtable()
 {
 	register nat_t *nat, **natp;
 	register int j = 0;
-  
+
 	/*
 	 * ALL NAT mappings deleted, so lets just make the deletions
 	 * quicker.
@@ -1121,6 +1147,8 @@ int direction;
 
 	bzero((char *)nat, sizeof(*nat));
 	nat->nat_flags = flags;
+	if (flags & FI_WILDP)
+		nat_wilds++;
 	/*
 	 * Search the current table for a match.
 	 */
@@ -1443,16 +1471,22 @@ nat_t	*nat;
 
 	nat->nat_next = nat_instances;
 	nat_instances = nat;
+
 	hv = NAT_HASH_FN(nat->nat_inip.s_addr, nat->nat_inport,
 			 ipf_nattable_sz);
 	natp = &nat_table[0][hv];
-	nat->nat_hstart[0] = natp;
+	if (*natp)
+		(*natp)->nat_phnext[0] = &nat->nat_hnext[0];
+	nat->nat_phnext[0] = natp;
 	nat->nat_hnext[0] = *natp;
 	*natp = nat;
+
 	hv = NAT_HASH_FN(nat->nat_outip.s_addr, nat->nat_outport,
 			 ipf_nattable_sz);
 	natp = &nat_table[1][hv];
-	nat->nat_hstart[1] = natp;
+	if (*natp)
+		(*natp)->nat_phnext[1] = &nat->nat_hnext[1];
+	nat->nat_phnext[1] = natp;
 	nat->nat_hnext[1] = *natp;
 	*natp = nat;
 
@@ -1560,12 +1594,16 @@ int dir;
 	u_32_t sum1, sum2, sumd;
 	struct in_addr in;
 	icmphdr_t *icmp;
+	udphdr_t *udp;
 	nat_t *nat;
 	ip_t *oip;
 	int flags = 0;
 
 	if ((fin->fin_fi.fi_fl & FI_SHORT) || (ip->ip_off & IP_OFFMASK))
 		return NULL;
+	/*
+	 * nat_icmplookup() will return NULL for `defective' packets.
+	 */
 	if ((ip->ip_v != 4) || !(nat = nat_icmplookup(ip, fin, dir)))
 		return NULL;
 	*nflags = IPN_ICMPERR;
@@ -1575,16 +1613,33 @@ int dir;
 		flags = IPN_TCP;
 	else if (oip->ip_p == IPPROTO_UDP)
 		flags = IPN_UDP;
+	udp = (udphdr_t *)((((char *)oip) + (oip->ip_hl << 2)));
 	/*
 	 * Need to adjust ICMP header to include the real IP#'s and
 	 * port #'s.  Only apply a checksum change relative to the
-	 * IP address change is it will be modified again in ip_natout
+	 * IP address change as it will be modified again in ip_natout
 	 * for both address and port.  Two checksum changes are
 	 * necessary for the two header address changes.  Be careful
 	 * to only modify the checksum once for the port # and twice
 	 * for the IP#.
 	 */
 
+	/*
+	 * Step 1
+	 * Fix the IP addresses in the offending IP packet. You also need
+	 * to adjust the IP header checksum of that offending IP packet
+	 * and the ICMP checksum of the ICMP error message itself.
+	 *
+	 * Unfortunately, for UDP and TCP, the IP addresses are also contained
+	 * in the pseudo header that is used to compute the UDP resp. TCP
+	 * checksum. So, we must compensate that as well. Even worse, the
+	 * change in the UDP and TCP checksums require yet another
+	 * adjustment of the ICMP checksum of the ICMP error message.
+	 *
+	 * For the moment we forget about TCP, because that checksum is not
+	 * in the first 8 bytes, so it will not be available in most cases.
+	 */
+
 	if (nat->nat_dir == NAT_OUTBOUND) {
 		sum1 = LONG_SUM(ntohl(oip->ip_src.s_addr));
 		in = nat->nat_inip;
@@ -1600,19 +1655,117 @@ int dir;
 	CALC_SUMD(sum1, sum2, sumd);
 
 	if (nat->nat_dir == NAT_OUTBOUND) {
-		fix_incksum(&oip->ip_sum, sumd, 0);
+		/*
+		 * Fix IP checksum of the offending IP packet to adjust for
+		 * the change in the IP address.
+		 *
+		 * Normally, you would expect that the ICMP checksum of the 
+		 * ICMP error message needs to be adjusted as well for the
+		 * IP address change in oip.
+		 * However, this is a NOP, because the ICMP checksum is 
+		 * calculated over the complete ICMP packet, which includes the
+		 * changed oip IP addresses and oip->ip_sum. However, these 
+		 * two changes cancel each other out (if the delta for
+		 * the IP address is x, then the delta for ip_sum is minus x), 
+		 * so no change in the icmp_cksum is necessary.
+		 *
+		 * Be careful that nat_dir refers to the direction of the
+		 * offending IP packet (oip), not to its ICMP response (icmp)
+		 */
+		fix_datacksum(&oip->ip_sum, sumd);
 
-		sumd += (sumd & 0xffff);
-		while (sumd > 0xffff)
-			sumd = (sumd & 0xffff) + (sumd >> 16);
-		fix_outcksum(&icmp->icmp_cksum, sumd, 0);
+		/*
+		 * Fix UDP pseudo header checksum to compensate for the
+		 * IP address change.
+		 */
+		if (oip->ip_p == IPPROTO_UDP && udp->uh_sum) {
+			/*
+			 * The UDP checksum is optional, only adjust it 
+			 * if it has been set.
+			 */
+			sum1 = ntohs(udp->uh_sum);
+			fix_datacksum(&udp->uh_sum, sumd);
+			sum2 = ntohs(udp->uh_sum);
+
+			/*
+			 * Fix ICMP checksum to compensate the UDP 
+			 * checksum adjustment.
+			 */
+			CALC_SUMD(sum1, sum2, sumd);
+			fix_outcksum(&icmp->icmp_cksum, sumd);
+		}
+
+#if 0
+		/*
+		 * Fix TCP pseudo header checksum to compensate for the 
+		 * IP address change. Before we can do the change, we
+		 * must make sure that oip is sufficient large to hold
+		 * the TCP checksum (normally it does not!).
+		 */
+		if (oip->ip_p == IPPROTO_TCP) {
+		
+		}
+#endif
 	} else {
-		fix_outcksum(&oip->ip_sum, sumd, 0);
+
+		/*
+		 * Fix IP checksum of the offending IP packet to adjust for
+		 * the change in the IP address.
+		 *
+		 * Normally, you would expect that the ICMP checksum of the 
+		 * ICMP error message needs to be adjusted as well for the
+		 * IP address change in oip.
+		 * However, this is a NOP, because the ICMP checksum is 
+		 * calculated over the complete ICMP packet, which includes the
+		 * changed oip IP addresses and oip->ip_sum. However, these 
+		 * two changes cancel each other out (if the delta for
+		 * the IP address is x, then the delta for ip_sum is minus x), 
+		 * so no change in the icmp_cksum is necessary.
+		 *
+		 * Be careful that nat_dir refers to the direction of the
+		 * offending IP packet (oip), not to its ICMP response (icmp)
+		 */
+		fix_datacksum(&oip->ip_sum, sumd);
+
+/* XXX FV : without having looked at Solaris source code, it seems unlikely
+ * that SOLARIS would compensate this in the kernel (a body of an IP packet 
+ * in the data section of an ICMP packet). I have the feeling that this should
+ * be unconditional, but I'm not in a position to check.
+ */
 #if !SOLARIS && !defined(__sgi)
-		sumd += (sumd & 0xffff);
-		while (sumd > 0xffff)
-			sumd = (sumd & 0xffff) + (sumd >> 16);
-		fix_incksum(&icmp->icmp_cksum, sumd, 0);
+		/*
+		 * Fix UDP pseudo header checksum to compensate for the
+		 * IP address change.
+		 */
+		if (oip->ip_p == IPPROTO_UDP && udp->uh_sum) {
+			/*
+			 * The UDP checksum is optional, only adjust it 
+			 * if it has been set 
+			 */
+			sum1 = ntohs(udp->uh_sum);
+			fix_datacksum(&udp->uh_sum, sumd);
+			sum2 = ntohs(udp->uh_sum);
+
+			/*
+			 * Fix ICMP checksum to compensate the UDP 
+			 * checksum adjustment.
+			 */
+			CALC_SUMD(sum1, sum2, sumd);
+			fix_incksum(&icmp->icmp_cksum, sumd);
+		}
+		
+#if 0
+		/* 
+		 * Fix TCP pseudo header checksum to compensate for the 
+		 * IP address change. Before we can do the change, we
+		 * must make sure that oip is sufficient large to hold
+		 * the TCP checksum (normally it does not!).
+		 */
+		if (oip->ip_p == IPPROTO_TCP) {
+		
+		};
+#endif
+		
 #endif
 	}
 
@@ -1623,23 +1776,98 @@ int dir;
 		 * XXX - what if this is bogus hl and we go off the end ?
 		 * In this case, nat_icmpinlookup() will have returned NULL.
 		 */
-		tcp = (tcphdr_t *)((((char *)oip) + (oip->ip_hl << 2)));
+		tcp = (tcphdr_t *)udp;
+
+		/*
+		 * Step 2 :
+		 * For offending TCP/UDP IP packets, translate the ports as
+		 * well, based on the NAT specification. Of course such
+		 * a change must be reflected in the ICMP checksum as well.
+		 *
+		 * Advance notice : Now it becomes complicated :-)
+		 *
+		 * Since the port fields are part of the TCP/UDP checksum
+		 * of the offending IP packet, you need to adjust that checksum
+		 * as well... but, if you change, you must change the icmp
+		 * checksum *again*, to reflect that change.
+		 *
+		 * To further complicate: the TCP checksum is not in the first
+		 * 8 bytes of the offending ip packet, so it most likely is not
+		 * available (we might have to fix that if the encounter a
+		 * device that returns more than 8 data bytes on icmp error)
+		 */
 
 		if (nat->nat_dir == NAT_OUTBOUND) {
 			if (tcp->th_sport != nat->nat_inport) {
+				/*
+				 * Fix ICMP checksum to compensate port
+				 * adjustment.
+				 */
 				sum1 = ntohs(tcp->th_sport);
 				sum2 = ntohs(nat->nat_inport);
 				CALC_SUMD(sum1, sum2, sumd);
 				tcp->th_sport = nat->nat_inport;
-				fix_outcksum(&icmp->icmp_cksum, sumd, 0);
+				fix_outcksum(&icmp->icmp_cksum, sumd);
+
+				/*
+				 * Fix udp checksum to compensate port
+				 * adjustment.  NOTE : the offending IP packet
+				 * flows the other direction compared to the
+				 * ICMP message.
+				 *
+				 * The UDP checksum is optional, only adjust
+				 * it if it has been set.
+				 */
+				if (oip->ip_p == IPPROTO_UDP && udp->uh_sum) {
+
+					sum1 = ntohs(udp->uh_sum);
+					fix_datacksum(&udp->uh_sum, sumd);
+					sum2 = ntohs(udp->uh_sum);
+
+					/*
+					 * Fix ICMP checksum to 
+					 * compensate UDP checksum 
+					 * adjustment.
+					 */
+					CALC_SUMD(sum1, sum2, sumd);
+					fix_outcksum(&icmp->icmp_cksum, sumd);
+				}
 			}
 		} else {
+
 			if (tcp->th_dport != nat->nat_outport) {
+				/*
+				 * Fix ICMP checksum to compensate port
+				 * adjustment.
+				 */
 				sum1 = ntohs(tcp->th_dport);
 				sum2 = ntohs(nat->nat_outport);
 				CALC_SUMD(sum1, sum2, sumd);
 				tcp->th_dport = nat->nat_outport;
-				fix_incksum(&icmp->icmp_cksum, sumd, 0);
+				fix_incksum(&icmp->icmp_cksum, sumd);
+
+				/*
+				 * Fix udp checksum to compensate port
+				 * adjustment.   NOTE : the offending IP
+				 * packet flows the other direction compared
+				 * to the ICMP message.
+				 *
+				 * The UDP checksum is optional, only adjust
+				 * it if it has been set.
+				 */
+				if (oip->ip_p == IPPROTO_UDP && udp->uh_sum) {
+
+					sum1 = ntohs(udp->uh_sum);
+					fix_datacksum(&udp->uh_sum, sumd);
+					sum2 = ntohs(udp->uh_sum);
+
+					/*
+					 * Fix ICMP checksum to compensate
+					 * UDP checksum adjustment.
+					 */
+					CALC_SUMD(sum1, sum2, sumd);
+					fix_incksum(&icmp->icmp_cksum, sumd);
+				}
 			}
 		}
 	}
@@ -1664,30 +1892,92 @@ register u_int flags, p;
 struct in_addr src , mapdst;
 u_32_t ports;
 {
-	register u_short sport, mapdport;
+	register u_short sport, dport;
 	register nat_t *nat;
 	register int nflags;
+	register u_32_t dst;
 	u_int hv;
 
-	mapdport = ports >> 16;
+	dst = mapdst.s_addr;
+	dport = ports >> 16;
 	sport = ports & 0xffff;
 	flags &= IPN_TCPUDP;
 
-	hv = NAT_HASH_FN(mapdst.s_addr, mapdport, ipf_nattable_sz);
+	hv = NAT_HASH_FN(dst, dport, ipf_nattable_sz);
 	nat = nat_table[1][hv];
 	for (; nat; nat = nat->nat_hnext[1]) {
 		nflags = nat->nat_flags;
 		if ((!ifp || ifp == nat->nat_ifp) &&
 		    nat->nat_oip.s_addr == src.s_addr &&
-		    nat->nat_outip.s_addr == mapdst.s_addr &&
+		    nat->nat_outip.s_addr == dst &&
 		    (((p == 0) && (flags == (nat->nat_flags & IPN_TCPUDP)))
 		     || (p == nat->nat_p)) && (!flags ||
 		     (((nat->nat_oport == sport) || (nflags & FI_W_DPORT)) &&
-		      ((nat->nat_outport == mapdport) ||
-		       (nflags & FI_W_SPORT)))))
+		      ((nat->nat_outport == dport) || (nflags & FI_W_SPORT)))))
 			return nat;
 	}
-	return NULL;
+	if (!nat_wilds || !(flags & IPN_TCPUDP))
+		return NULL;
+	RWLOCK_EXIT(&ipf_nat);
+	hv = NAT_HASH_FN(dst, 0, ipf_nattable_sz);
+	WRITE_ENTER(&ipf_nat);
+	nat = nat_table[1][hv];
+	for (; nat; nat = nat->nat_hnext[1]) {
+		nflags = nat->nat_flags;
+		if (ifp && ifp != nat->nat_ifp)
+			continue;
+		if (!(nflags & IPN_TCPUDP))
+			continue;
+		if (!(nflags & FI_WILDP))
+			continue;
+		if (nat->nat_oip.s_addr != src.s_addr ||
+		    nat->nat_outip.s_addr != dst)
+			continue;
+		if (((nat->nat_oport == sport) || (nflags & FI_W_DPORT)) &&
+		    ((nat->nat_outport == dport) || (nflags & FI_W_SPORT))) {
+			hv = NAT_HASH_FN(dst, dport, ipf_nattable_sz);
+			nat_tabmove(nat, hv);
+			break;
+		}
+	}
+	MUTEX_DOWNGRADE(&ipf_nat);
+	return nat;
+}
+
+
+static void nat_tabmove(nat, hv)
+nat_t *nat;
+u_int hv;
+{
+	nat_t **natp;
+
+	/*
+	 * Remove the NAT entry from the old location
+	 */
+	if (nat->nat_hnext[0])
+		nat->nat_hnext[0]->nat_phnext[0] = nat->nat_phnext[0];
+	*nat->nat_phnext[0] = nat->nat_hnext[0];
+
+	if (nat->nat_hnext[1])
+		nat->nat_hnext[0]->nat_phnext[1] = nat->nat_phnext[1];
+	*nat->nat_phnext[1] = nat->nat_hnext[1];
+
+	natp = &nat_table[0][hv];
+	if (*natp)
+		(*natp)->nat_phnext[0] = &nat->nat_hnext[0];
+	nat->nat_phnext[0] = natp;
+	nat->nat_hnext[0] = *natp;
+	*natp = nat;
+
+	/*
+	 * Add into the NAT table in the new position
+	 */
+	natp = &nat_table[1][hv];
+	if (*natp)
+		(*natp)->nat_phnext[1] = &nat->nat_hnext[1];
+	nat->nat_phnext[1] = natp;
+	nat->nat_hnext[1] = *natp;
+	*natp = nat;
 }
 
 
@@ -1706,19 +1996,21 @@ u_32_t ports;
 	register u_short sport, dport;
 	register nat_t *nat;
 	register int nflags;
+	u_32_t srcip;
 	u_int hv;
 
 	sport = ports & 0xffff;
 	dport = ports >> 16;
 	flags &= IPN_TCPUDP;
+	srcip = src.s_addr;
 
-	hv = NAT_HASH_FN(src.s_addr, sport, ipf_nattable_sz);
+	hv = NAT_HASH_FN(srcip, sport, ipf_nattable_sz);
 	nat = nat_table[0][hv];
 	for (; nat; nat = nat->nat_hnext[0]) {
 		nflags = nat->nat_flags;
 
 		if ((!ifp || ifp == nat->nat_ifp) &&
-		    nat->nat_inip.s_addr == src.s_addr &&
+		    nat->nat_inip.s_addr == srcip &&
 		    nat->nat_oip.s_addr == dst.s_addr &&
 		    (((p == 0) && (flags == (nat->nat_flags & IPN_TCPUDP)))
 		     || (p == nat->nat_p)) && (!flags ||
@@ -1726,7 +2018,32 @@ u_32_t ports;
 		      (nat->nat_oport == dport || nflags & FI_W_DPORT))))
 			return nat;
 	}
-	return NULL;
+	if (!nat_wilds || !(flags & IPN_TCPUDP))
+		return NULL;
+	RWLOCK_EXIT(&ipf_nat);
+	hv = NAT_HASH_FN(srcip, 0, ipf_nattable_sz);
+	WRITE_ENTER(&ipf_nat);
+	nat = nat_table[0][hv];
+	for (; nat; nat = nat->nat_hnext[0]) {
+		nflags = nat->nat_flags;
+		if (ifp && ifp != nat->nat_ifp)
+			continue;
+		if (!(nflags & IPN_TCPUDP))
+			continue;
+		if (!(nflags & FI_WILDP))
+			continue;
+		if ((nat->nat_inip.s_addr != srcip) ||
+		    (nat->nat_oip.s_addr != dst.s_addr))
+			continue;
+		if (((nat->nat_inport == sport) || (nflags & FI_W_DPORT)) &&
+		    ((nat->nat_oport == dport) || (nflags & FI_W_SPORT))) {
+			hv = NAT_HASH_FN(srcip, sport, ipf_nattable_sz);
+			nat_tabmove(nat, hv);
+			break;
+		}
+	}
+	MUTEX_DOWNGRADE(&ipf_nat);
+	return nat;
 }
 
 
@@ -1862,6 +2179,7 @@ fr_info_t *fin;
 				nat->nat_outport = sport;
 			nat->nat_flags &= ~(FI_W_DPORT|FI_W_SPORT);
 			nflags = nat->nat_flags;
+			nat_wilds--;
 		}
 	} else {
 		RWLOCK_EXIT(&ipf_nat);
@@ -1942,16 +2260,16 @@ maskloop:
 			CALC_SUMD(s1, s2, sumd);
 
 			if (nat->nat_dir == NAT_OUTBOUND)
-				fix_incksum(&ip->ip_sum, sumd, 0);
+				fix_incksum(&ip->ip_sum, sumd);
 			else
-				fix_outcksum(&ip->ip_sum, sumd, 0);
+				fix_outcksum(&ip->ip_sum, sumd);
 		}
 #if SOLARIS || defined(__sgi)
 		else {
 			if (nat->nat_dir == NAT_OUTBOUND)
-				fix_outcksum(&ip->ip_sum, nat->nat_ipsumd, 0);
+				fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
 			else
-				fix_incksum(&ip->ip_sum, nat->nat_ipsumd, 0);
+				fix_incksum(&ip->ip_sum, nat->nat_ipsumd);
 		}
 #endif
 		ip->ip_src = nat->nat_outip;
@@ -1995,11 +2313,9 @@ maskloop:
 
 			if (csump) {
 				if (nat->nat_dir == NAT_OUTBOUND)
-					fix_outcksum(csump, nat->nat_sumd[1],
-						     ip->ip_len);
+					fix_outcksum(csump, nat->nat_sumd[1]);
 				else
-					fix_incksum(csump, nat->nat_sumd[1],
-						     ip->ip_len);
+					fix_incksum(csump, nat->nat_sumd[1]);
 			}
 		}
 
@@ -2076,6 +2392,7 @@ fr_info_t *fin;
 				nat->nat_outport = dport;
 			nat->nat_flags &= ~(FI_W_SPORT|FI_W_DPORT);
 			nflags = nat->nat_flags;
+			nat_wilds--;
 		}
 	} else {
 		RWLOCK_EXIT(&ipf_nat);
@@ -2153,9 +2470,9 @@ maskloop:
 		 */
 #if SOLARIS || defined(__sgi)
 		if (nat->nat_dir == NAT_OUTBOUND)
-			fix_incksum(&ip->ip_sum, nat->nat_ipsumd, 0);
+			fix_incksum(&ip->ip_sum, nat->nat_ipsumd);
 		else
-			fix_outcksum(&ip->ip_sum, nat->nat_ipsumd, 0);
+			fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
 #endif
 		if (!(ip->ip_off & IP_OFFMASK) &&
 		    !(fin->fin_fi.fi_fl & FI_SHORT)) {
@@ -2196,11 +2513,9 @@ maskloop:
 
 			if (csump) {
 				if (nat->nat_dir == NAT_OUTBOUND)
-					fix_incksum(csump, nat->nat_sumd[0],
-						    0);
+					fix_incksum(csump, nat->nat_sumd[0]);
 				else
-					fix_outcksum(csump, nat->nat_sumd[0],
-						     0);
+					fix_outcksum(csump, nat->nat_sumd[0]);
 			}
 		}
 		ATOMIC_INCL(nat_stats.ns_mapped[0]);
diff --git a/contrib/ipfilter/ip_nat.h b/contrib/ipfilter/ip_nat.h
index 26fed25..c2ff100 100644
--- a/contrib/ipfilter/ip_nat.h
+++ b/contrib/ipfilter/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 2.17.2.6 2000/07/15 14:50:06 darrenr Exp $
+ * $Id: ip_nat.h,v 2.17.2.9 2000/10/19 15:44:04 darrenr Exp $
  */
 
 #ifndef	__IP_NAT_H__
@@ -81,7 +81,7 @@ typedef	struct	nat	{
 	struct	hostmap	*nat_hm;
 	struct	nat	*nat_next;
 	struct	nat	*nat_hnext[2];
-	struct	nat	**nat_hstart[2];
+	struct	nat	**nat_phnext[2];
 	void	*nat_ifp;
 	int	nat_dir;
 	char	nat_ifname[IFNAMSIZ];
@@ -141,6 +141,11 @@ typedef	struct	ipnat	{
 #define	NAT_REDIRECT	0x02
 #define	NAT_BIMAP	(NAT_MAP|NAT_REDIRECT)
 #define	NAT_MAPBLK	0x04
+/* 0x100 reserved for FI_W_SPORT */
+/* 0x200 reserved for FI_W_DPORT */
+/* 0x400 reserved for FI_W_SADDR */
+/* 0x800 reserved for FI_W_DADDR */
+/* 0x1000 reserved for FI_W_NEWFR */
 
 #define	MAPBLK_MINPORT	1024	/* don't use reserved ports for src port */
 #define	USABLE_PORTS	(65536 - MAPBLK_MINPORT)
@@ -293,7 +298,8 @@ extern	int	ip_natout __P((ip_t *, fr_info_t *));
 extern	int	ip_natin __P((ip_t *, fr_info_t *));
 extern	void	ip_natunload __P((void)), ip_natexpire __P((void));
 extern	void	nat_log __P((struct nat *, u_int));
-extern	void	fix_incksum __P((u_short *, u_32_t, int));
-extern	void	fix_outcksum __P((u_short *, u_32_t, int));
+extern	void	fix_incksum __P((u_short *, u_32_t));
+extern	void	fix_outcksum __P((u_short *, u_32_t));
+extern	void	fix_datacksum __P((u_short *, u_32_t));
 
 #endif /* __IP_NAT_H__ */
diff --git a/contrib/ipfilter/ip_raudio_pxy.c b/contrib/ipfilter/ip_raudio_pxy.c
index 18ca474..d801410 100644
--- a/contrib/ipfilter/ip_raudio_pxy.c
+++ b/contrib/ipfilter/ip_raudio_pxy.c
@@ -1,5 +1,5 @@
 /*
- * $Id: ip_raudio_pxy.c,v 1.7.2.1 2000/05/06 11:19:33 darrenr Exp $
+ * $Id: ip_raudio_pxy.c,v 1.7.2.2 2000/09/03 00:23:12 darrenr Exp $
  */
 #if SOLARIS && defined(_KERNEL)
 extern	kmutex_t	ipf_rw;
@@ -171,8 +171,8 @@ nat_t *nat;
 	tcphdr_t *tcp, tcph, *tcp2 = &tcph;
 	raudio_t *rap = aps->aps_data;
 	struct in_addr swa, swb;
-	u_int a1, a2, a3, a4;
 	int off, dlen, slen;
+	int a1, a2, a3, a4;
 	u_short sp, dp;
 	fr_info_t fi;
 	tcp_seq seq;
diff --git a/contrib/ipfilter/ip_sfil.c b/contrib/ipfilter/ip_sfil.c
index 38e5e3e..7d4ea2d 100644
--- a/contrib/ipfilter/ip_sfil.c
+++ b/contrib/ipfilter/ip_sfil.c
@@ -9,7 +9,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "%W% %G% (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_sfil.c,v 2.23.2.6 2000/08/07 12:36:19 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_sfil.c,v 2.23.2.8 2000/10/19 15:42:10 darrenr Exp $";
 #endif
 
 #include <sys/types.h>
@@ -441,7 +441,7 @@ caddr_t data;
 	}
 
 	group = fp->fr_group;
-	if (group != NULL) {
+	if (group != 0) {
 		fg = fr_findgroup(group, fp->fr_flags, unit, set, NULL);
 		if (fg == NULL) {
 			error = ESRCH;
@@ -613,7 +613,7 @@ caddr_t data;
 					fixskip(fprev, f, 1);
 				f->fr_grp = NULL;
 				group = f->fr_grhead;
-				if (group != NULL)
+				if (group != 0)
 					fg = fr_addgroup(group, f, unit, set);
 			} else
 				error = ENOMEM;
@@ -688,7 +688,7 @@ ip_t *oip;
 fr_info_t *fin;
 {
 	tcphdr_t *tcp, *tcp2;
-	int tlen = 0, hlen;
+	int tlen, hlen;
 	mblk_t *m;
 #ifdef	USE_INET6
 	ip6_t *ip6, *oip6 = (ip6_t *)oip;
@@ -698,8 +698,7 @@ fr_info_t *fin;
 	tcp = (struct tcphdr *)fin->fin_dp;
 	if (tcp->th_flags & TH_RST)
 		return -1;
-	if (tcp->th_flags & TH_SYN)
-		tlen = 1;
+	tlen = (tcp->th_flags & (TH_SYN|TH_FIN)) ? 1 : 0;
 #ifdef	USE_INET6
 	if (fin->fin_v == 6)
 		hlen = sizeof(ip6_t);
@@ -717,8 +716,15 @@ fr_info_t *fin;
 	tcp2 = (struct tcphdr *)(m->b_rptr + hlen - sizeof(*tcp2));
 	tcp2->th_dport = tcp->th_sport;
 	tcp2->th_sport = tcp->th_dport;
-	tcp2->th_ack = htonl(ntohl(tcp->th_seq) + tlen);
-	tcp2->th_seq = tcp->th_ack;
+	if (tcp->th_flags & TH_ACK) {
+		tcp2->th_seq = tcp->th_ack;
+		tcp2->th_flags = TH_RST|TH_ACK;
+	} else {
+		tcp2->th_ack = ntohl(tcp->th_seq);
+		tcp2->th_ack += tlen;
+		tcp2->th_ack = htonl(tcp2->th_ack);
+		tcp2->th_flags = TH_RST;
+	}
 	tcp2->th_off = sizeof(struct tcphdr) >> 2;
 	tcp2->th_flags = TH_RST|TH_ACK;
 
@@ -791,8 +797,9 @@ int dst;
 	struct icmp *icmp;
 	mblk_t *m, *mb;
 	int hlen, code;
-	qif_t	*qif;
+	qif_t *qif;
 	u_short sz;
+	ill_t *il;
 #ifdef	USE_INET6
 	ip6_t *ip6, *oip6;
 #endif
@@ -851,6 +858,11 @@ int dst;
 	icmp->icmp_type = type;
 	icmp->icmp_code = code;
 	icmp->icmp_cksum = 0;
+#ifdef	icmp_nextmtu
+	if (type == ICMP_UNREACH && (il = qif->qf_ill) &&
+	    fin->fin_icode == ICMP_UNREACH_NEEDFRAG)
+		icmp->icmp_nextmtu = htons(il->ill_max_frag);
+#endif
 
 #ifdef	USE_INET6
 	if (oip->ip_v == 6) {
diff --git a/contrib/ipfilter/ip_state.c b/contrib/ipfilter/ip_state.c
index f05c887..4f7460e 100644
--- a/contrib/ipfilter/ip_state.c
+++ b/contrib/ipfilter/ip_state.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ip_state.c	1.8 6/5/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.30.2.17 2000/08/08 16:01:03 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.30.2.22 2000/10/26 10:41:29 darrenr Exp $";
 #endif
 
 #include <sys/errno.h>
@@ -106,6 +106,7 @@ static const char rcsid[] = "@(#)$Id: ip_state.c,v 2.30.2.17 2000/08/08 16:01:03
 static ipstate_t **ips_table = NULL;
 static ipstate_t *ips_list = NULL;
 static int	ips_num = 0;
+static int	ips_wild = 0;
 static ips_stat_t ips_stats;
 #if	(SOLARIS || defined(__sgi)) && defined(_KERNEL)
 extern	KRWLOCK_T	ipf_state, ipf_mutex;
@@ -123,6 +124,7 @@ static int fr_state_flush __P((int));
 static ips_stat_t *fr_statetstats __P((void));
 static void fr_delstate __P((ipstate_t *));
 static int fr_state_remove __P((caddr_t));
+static void fr_ipsmove __P((ipstate_t **, ipstate_t *, u_int));
 int fr_stputent __P((caddr_t));
 int fr_stgetent __P((caddr_t));
 void fr_stinsert __P((ipstate_t *));
@@ -135,7 +137,8 @@ u_long	fr_tcpidletimeout = FIVE_DAYS,
 	fr_tcpclosewait = 2 * TCP_MSL,
 	fr_tcplastack = 2 * TCP_MSL,
 	fr_tcptimeout = 2 * TCP_MSL,
-	fr_tcpclosed = 1,
+	fr_tcpclosed = 120,
+	fr_tcphalfclosed = 2 * 2 * 3600,    /* 2 hours */
 	fr_udptimeout = 240,
 	fr_icmptimeout = 120;
 int	fr_statemax = IPSTATE_MAX,
@@ -240,9 +243,12 @@ caddr_t data;
 
 	for (sp = ips_list; sp; sp = sp->is_next)
 		if ((sp->is_p == st.is_p) && (sp->is_v == st.is_v) &&
-		    !bcmp(&sp->is_src, &st.is_src, sizeof(st.is_src)) &&
-		    !bcmp(&sp->is_dst, &st.is_src, sizeof(st.is_dst)) &&
-		    !bcmp(&sp->is_ps, &st.is_ps, sizeof(st.is_ps))) {
+		    !bcmp((char *)&sp->is_src, (char *)&st.is_src,
+			  sizeof(st.is_src)) &&
+		    !bcmp((char *)&sp->is_dst, (char *)&st.is_src,
+			  sizeof(st.is_dst)) &&
+		    !bcmp((char *)&sp->is_ps, (char *)&st.is_ps,
+			  sizeof(st.is_ps))) {
 			WRITE_ENTER(&ipf_state);
 #ifdef	IPFILTER_LOG
 			ipstate_log(sp, ISL_REMOVE);
@@ -590,8 +596,8 @@ u_int flags;
 			hv += tcp->th_dport;
 			hv += tcp->th_sport;
 		}
-		is->is_send = ntohl(tcp->th_seq) + ip->ip_len -
-			      fin->fin_hlen - (tcp->th_off << 2) +
+		is->is_send = ntohl(tcp->th_seq) + fin->fin_dlen -
+			      (tcp->th_off << 2) +
 			      ((tcp->th_flags & TH_SYN) ? 1 : 0) +
 			      ((tcp->th_flags & TH_FIN) ? 1 : 0);
 		is->is_maxsend = is->is_send;
@@ -660,6 +666,8 @@ u_int flags;
 	is->is_flags = fin->fin_fi.fi_fl & FI_CMP;
 	is->is_flags |= FI_CMP << 4;
 	is->is_flags |= flags & (FI_WILDP|FI_WILDA);
+	if (flags & (FI_WILDP|FI_WILDA))
+		ips_wild++;
 	is->is_ifp[1 - out] = NULL;
 	is->is_ifp[out] = fin->fin_ifp;
 #ifdef	_KERNEL
@@ -718,6 +726,7 @@ tcphdr_t *tcp;
 	       ((tcp->th_flags & TH_SYN) ? 1 : 0) +
 	       ((tcp->th_flags & TH_FIN) ? 1 : 0);
 
+	MUTEX_ENTER(&is->is_lock);
 	if (fdata->td_end == 0) {
 		/*
 		 * Must be a (outgoing) SYN-ACK in reply to a SYN.
@@ -783,12 +792,11 @@ tcphdr_t *tcp;
 		/*
 		 * Nearing end of connection, start timeout.
 		 */
-		MUTEX_ENTER(&is->is_lock);
 		/* source ? 0 : 1 -> !source */
 		fr_tcp_age(&is->is_age, is->is_state, fin, !source);
-		MUTEX_EXIT(&is->is_lock);
 		ret = 1;
 	}
+	MUTEX_EXIT(&is->is_lock);
 	return ret;
 }
 
@@ -892,6 +900,7 @@ tcphdr_t *tcp;
 			is->is_maxdend = is->is_dend + 1;
 		}
 		is->is_flags &= ~(FI_W_SPORT|FI_W_DPORT);
+		ips_wild--;
 	}
 
 	ret = -1;
@@ -983,7 +992,7 @@ fr_info_t *fin;
 	 * Only a basic IP header (no options) should be with
 	 * an ICMP error header.
 	 */
-	if (((ip->ip_v != 4) && (ip->ip_hl != 5)) ||
+	if (((ip->ip_v != 4) || (ip->ip_hl != 5)) ||
 	    (fin->fin_plen < ICMPERR_MINPKTLEN))
 		return NULL;
 	ic = (struct icmp *)fin->fin_dp;
@@ -1037,8 +1046,8 @@ fr_info_t *fin;
 	 * the IP6EQ and IP6NEQ macros produce the wrong results because
 	 * of the 'junk' in the unused part of the union
 	 */
-	bzero(&src, sizeof(src));
-	bzero(&dst, sizeof(dst));
+	bzero((char *)&src, sizeof(src));
+	bzero((char *)&dst, sizeof(dst));
 
 	if (oip->ip_p == IPPROTO_ICMP) {
 		icmp = (icmphdr_t *)((char *)oip + (oip->ip_hl << 2));
@@ -1158,6 +1167,38 @@ fr_info_t *fin;
 	return NULL;
 }
 
+
+static void fr_ipsmove(isp, is, hv)
+ipstate_t **isp, *is;
+u_int hv;
+{
+	u_int hvm;
+
+	hvm = is->is_hv;
+	/*
+	 * Remove the hash from the old location...
+	 */
+	if (is->is_hnext)
+		is->is_hnext->is_phnext = isp;
+	*isp = is->is_hnext;
+	if (ips_table[hvm] == NULL)
+		ips_stats.iss_inuse--;
+
+	/*
+	 * ...and put the hash in the new one.
+	 */
+	hvm = hv % fr_statesize;
+	isp = &ips_table[hvm];
+	if (*isp)
+		(*isp)->is_phnext = &is->is_hnext;
+	else
+		ips_stats.iss_inuse++;
+	is->is_phnext = isp;
+	is->is_hnext = *isp;
+	*isp = is;
+}
+
+
 /*
  * Check if a packet has a registered state.
  */
@@ -1240,7 +1281,7 @@ fr_info_t *fin;
 		break;
 	case IPPROTO_TCP :
 	    {
-		register u_short dport = tcp->th_dport, sport = tcp->th_sport;
+		register u_short dport, sport;
 		register int i;
 
 		i = tcp->th_flags;
@@ -1250,57 +1291,42 @@ fr_info_t *fin;
 		if ((i & TH_RST) &&
 		    ((i & (TH_FIN|TH_SYN|TH_RST)) != TH_RST))
 			break;
+	case IPPROTO_UDP :
+		dport = tcp->th_dport;
+		sport = tcp->th_sport;
 		tryagain = 0;
-retry_tcp:
-		hvm = hv % fr_statesize;
-		WRITE_ENTER(&ipf_state);
-		for (isp = &ips_table[hvm]; (is = *isp);
-		     isp = &is->is_hnext)
-
-
-			if ((is->is_p == pr) && (is->is_v == v) &&
-			    fr_matchsrcdst(is, src, dst, fin, tcp)) {
-				if (fr_tcpstate(is, fin, ip, tcp))
-					break;
-				is = NULL;
-				break;
-			}
-		if (is != NULL)
-			break;
-		RWLOCK_EXIT(&ipf_state);
 		hv += dport;
 		hv += sport;
-		if (tryagain == 0) {
-			tryagain = 1;
-			goto retry_tcp;
-		}
-		break;
-	    }
-	case IPPROTO_UDP :
-	    {
-		register u_short dport = tcp->th_dport, sport = tcp->th_sport;
-
-		tryagain = 0;
-retry_udp:
-		hvm = hv % fr_statesize;
-		/*
-		 * Nothing else to match on but ports. and IP#'s
-		 */
 		READ_ENTER(&ipf_state);
-		for (is = ips_table[hvm]; is; is = is->is_hnext)
+retry_tcpudp:
+		hvm = hv % fr_statesize;
+		for (isp = &ips_table[hvm]; (is = *isp); isp = &is->is_hnext)
 			if ((is->is_p == pr) && (is->is_v == v) &&
 			    fr_matchsrcdst(is, src, dst, fin, tcp)) {
-				is->is_age = fr_udptimeout;
+				if ((pr == IPPROTO_TCP)) {
+					if (!fr_tcpstate(is, fin, ip, tcp)) {
+						continue;
+					}
+				}
 				break;
 			}
-		if (is != NULL)
+		if (is != NULL) {
+			if (tryagain &&
+			    !(is->is_flags & (FI_WILDP|FI_WILDA))) {
+				hv += dport;
+				hv += sport;
+				fr_ipsmove(isp, is, hv);
+				MUTEX_DOWNGRADE(&ipf_state);
+			}
 			break;
+		}
 		RWLOCK_EXIT(&ipf_state);
-		hv += dport;
-		hv += sport;
-		if (tryagain == 0) {
+		if (!tryagain && ips_wild) {
+			hv -= dport;
+			hv -= sport;
 			tryagain = 1;
-			goto retry_udp;
+			WRITE_ENTER(&ipf_state);
+			goto retry_tcpudp;
 		}
 		break;
 	    }
@@ -1357,6 +1383,8 @@ ipstate_t *is;
 {
 	frentry_t *fr;
 
+	if (is->is_flags & (FI_WILDP|FI_WILDA))
+		ips_wild--;
 	if (is->is_next)
 		is->is_next->is_pnext = is->is_pnext;
 	*is->is_pnext = is->is_next;
@@ -1566,7 +1594,7 @@ int dir;
 			 * SYN_RECEIVED -> FIN_WAIT_1
 			 */
 			state[dir] = TCPS_FIN_WAIT_1;
-			*age = fr_tcpidletimeout; /* or fr_tcptimeout? */
+			*age = fr_tcpidletimeout;
 		}
 		break;
 
@@ -1578,7 +1606,7 @@ int dir;
 			 * ESTABLISHED -> FIN_WAIT_1
 			 */
 			state[dir] = TCPS_FIN_WAIT_1;
-			*age = fr_tcpidletimeout;
+			*age = fr_tcphalfclosed;
 		} else if (flags & TH_ACK) {
 			/* an ACK, should we exclude other flags here? */
 			if (ostate == TCPS_FIN_WAIT_1) {
@@ -1590,7 +1618,7 @@ int dir;
 				 * a half-closed connection
 				 */
 				state[dir] = TCPS_CLOSE_WAIT;
-				*age = fr_tcpidletimeout;
+				*age = fr_tcphalfclosed;
 			} else if (ostate < TCPS_CLOSE_WAIT)
 				/*
 				 * Still a fully established connection,
@@ -1614,7 +1642,7 @@ int dir;
 			 * closed already and we did not close our side yet;
 			 * reset timeout
 			 */
-			*age  = fr_tcpidletimeout;
+			*age  = fr_tcphalfclosed;
 		}
 		break;
 
@@ -1638,7 +1666,7 @@ int dir;
 			 * other side is still active (ESTABLISHED/CLOSE_WAIT);
 			 * continue with this half-closed connection
 			 */
-			*age = fr_tcpidletimeout;
+			*age = fr_tcphalfclosed;
 		break;
 
 	case TCPS_CLOSING: /* 7 */
diff --git a/contrib/ipfilter/ip_state.h b/contrib/ipfilter/ip_state.h
index a5643af..1d1bc00 100644
--- a/contrib/ipfilter/ip_state.h
+++ b/contrib/ipfilter/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 2.13.2.1 2000/07/08 02:15:35 darrenr Exp $
+ * $Id: ip_state.h,v 2.13.2.2 2000/08/23 11:01:31 darrenr Exp $
  */
 #ifndef	__IP_STATE_H__
 #define	__IP_STATE_H__
@@ -173,6 +173,7 @@ extern	u_long	fr_tcpclosewait;
 extern	u_long	fr_tcplastack;
 extern	u_long	fr_tcptimeout;
 extern	u_long	fr_tcpclosed;
+extern	u_long	fr_tcphalfclosed;
 extern	u_long	fr_udptimeout;
 extern	u_long	fr_icmptimeout;
 extern	int	fr_state_lock;
diff --git a/contrib/ipfilter/ipf.c b/contrib/ipfilter/ipf.c
index 36448b4..355c42a 100644
--- a/contrib/ipfilter/ipf.c
+++ b/contrib/ipfilter/ipf.c
@@ -43,7 +43,7 @@
 
 #if !defined(lint)
 static const char sccsid[] = "@(#)ipf.c	1.23 6/5/96 (C) 1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ipf.c,v 2.10.2.3 2000/08/07 14:54:05 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ipf.c,v 2.10.2.5 2000/10/25 10:37:11 darrenr Exp $";
 #endif
 
 #if	SOLARIS
@@ -71,7 +71,7 @@ static	void	set_state __P((u_int)), showstats __P((friostat_t *));
 static	void	packetlogon __P((char *)), swapactive __P((void));
 static	int	opendevice __P((char *));
 static	void	closedevice __P((void));
-static	char	*getline __P((char *, size_t, FILE *));
+static	char	*getline __P((char *, size_t, FILE *, int *));
 static	char	*ipfname = IPL_NAME;
 static	void	usage __P((void));
 static	void	showversion __P((void));
@@ -252,8 +252,7 @@ char	*name, *file;
 		exit(1);
 	}
 
-	while (getline(line, sizeof(line), fp)) {
-	        linenum++;
+	while (getline(line, sizeof(line), fp, &linenum)) {
 		/*
 		 * treat CR as EOL.  LF is converted to NUL by getline().
 		 */
@@ -335,10 +334,11 @@ char	*name, *file;
  * Similar to fgets(3) but can handle '\\' and NL is converted to NUL.
  * Returns NULL if error occured, EOF encounterd or input line is too long.
  */
-static char *getline(str, size, file)
+static char *getline(str, size, file, linenum)
 register char	*str;
 size_t	size;
 FILE	*file;
+int	*linenum;
 {
 	char *p;
 	int s, len;
@@ -356,6 +356,7 @@ FILE	*file;
 				p[len] = '\0';
 				break;
 			}
+			(*linenum)++;
 			p[len - 1] = '\0';
 			if (len < 2 || p[len - 2] != '\\')
 				break;
@@ -568,7 +569,7 @@ static void showversion()
 	}
 
 	if (ioctl(vfd, SIOCGETFS, &fiop)) {
-		perror("ioctl(SIOCGETFS");
+		perror("ioctl(SIOCGETFS)");
 		close(vfd);
 		return;
 	}
diff --git a/contrib/ipfilter/ipl.h b/contrib/ipfilter/ipl.h
index 866d34d..cfec734 100644
--- a/contrib/ipfilter/ipl.h
+++ b/contrib/ipfilter/ipl.h
@@ -6,12 +6,12 @@
  * to the original author and the contributors.
  *
  * @(#)ipl.h	1.21 6/5/96
- * $Id: ipl.h,v 2.15.2.10 2000/08/07 15:10:09 darrenr Exp $
+ * $Id: ipl.h,v 2.15.2.13 2000/10/25 11:08:41 darrenr Exp $
  */
 
 #ifndef	__IPL_H__
 #define	__IPL_H__
 
-#define	IPL_VERSION	"IP Filter: v3.4.9"
+#define	IPL_VERSION	"IP Filter: v3.4.12"
 
 #endif
diff --git a/contrib/ipfilter/ipmon.c b/contrib/ipfilter/ipmon.c
index bb7e75f..5f9db0b 100644
--- a/contrib/ipfilter/ipmon.c
+++ b/contrib/ipfilter/ipmon.c
@@ -7,7 +7,7 @@
  */
 #if !defined(lint)
 static const char sccsid[] = "@(#)ipmon.c	1.21 6/5/96 (C)1993-2000 Darren Reed";
-static const char rcsid[] = "@(#)$Id: ipmon.c,v 2.12.2.4 2000/08/07 12:32:22 darrenr Exp $";
+static const char rcsid[] = "@(#)$Id: ipmon.c,v 2.12.2.5 2000/10/19 15:41:41 darrenr Exp $";
 #endif
 
 #ifndef SOLARIS
@@ -692,7 +692,7 @@ int	blen;
 		p = (u_short)ip->ip_p;
 		s = (u_32_t *)&ip->ip_src;
 		d = (u_32_t *)&ip->ip_dst;
-		plen = ntohs(ip->ip_len);
+		plen = ip->ip_len;
 	} else {
 		goto printipflog;
 	}
diff --git a/contrib/ipfilter/ipsend/44arp.c b/contrib/ipfilter/ipsend/44arp.c
index f19fe5f..7a16c5a 100644
--- a/contrib/ipfilter/ipsend/44arp.c
+++ b/contrib/ipfilter/ipsend/44arp.c
@@ -67,7 +67,7 @@ char	*addr, *eaddr;
 	struct	sockaddr_dl	*sdl;
 
 #ifdef	IPSEND
-	if (arp_getipv4(ip, ether) == 0)
+	if (arp_getipv4(addr, ether) == 0)
 		return 0;
 #endif
 
diff --git a/contrib/ipfilter/man/ipf.4 b/contrib/ipfilter/man/ipf.4
index 4549855..0e080a0 100644
--- a/contrib/ipfilter/man/ipf.4
+++ b/contrib/ipfilter/man/ipf.4
@@ -11,33 +11,33 @@ To add and delete rules to the filter list, three 'basic' ioctls are provided
 for use.  The ioctl's are called as:
 .LP
 .nf
-	ioctl(fd, SIOCADDFR, struct frentry *)
-	ioctl(fd, SIOCDELFR, struct frentry *)
+	ioctl(fd, SIOCADDFR, struct frentry **)
+	ioctl(fd, SIOCDELFR, struct frentry **)
 	ioctl(fd, SIOCIPFFL, int *)
 .fi
 .PP
 However, the full complement is as follows:
 .LP
 .nf
-	ioctl(fd, SIOCADAFR, struct frentry *) (same as SUICADDFR)
-	ioctl(fd, SIOCRMAFR, struct frentry *) (same as SUICDELFR)
-	ioctl(fd, SIOCADIFR, struct frentry *)
-	ioctl(fd, SIOCRMIFR, struct frentry *)
-	ioctl(fd, SIOCINAFR, struct frentry *)
-	ioctl(fd, SIOCINIFR, struct frentry *)
+	ioctl(fd, SIOCADAFR, struct frentry **) (same as SIOCADDFR)
+	ioctl(fd, SIOCRMAFR, struct frentry **) (same as SIOCDELFR)
+	ioctl(fd, SIOCADIFR, struct frentry **)
+	ioctl(fd, SIOCRMIFR, struct frentry **)
+	ioctl(fd, SIOCINAFR, struct frentry **)
+	ioctl(fd, SIOCINIFR, struct frentry **)
 	ioctl(fd, SIOCSETFF, u_int *)
 	ioctl(fd, SIOGGETFF, u_int *)
-	ioctl(fd, SIOCGETFS, struct friostat *)
+	ioctl(fd, SIOCGETFS, struct friostat **)
 	ioctl(fd, SIOCIPFFL, int *)
 	ioctl(fd, SIOCIPFFB, int *)
 	ioctl(fd, SIOCSWAPA, u_int *)
 	ioctl(fd, SIOCFRENB, u_int *)
 	ioctl(fd, SIOCFRSYN, u_int *)
-	ioctl(fd, SIOCFRZST, struct friostat *)
-	ioctl(fd, SIOCZRLST, struct frentry *)
-	ioctl(fd, SIOCAUTHW, struct fr_info *)
-	ioctl(fd, SIOCAUTHR, struct fr_info *)
-	ioctl(fd, SIOCATHST, struct fr_authstat *)
+	ioctl(fd, SIOCFRZST, struct friostat **)
+	ioctl(fd, SIOCZRLST, struct frentry **)
+	ioctl(fd, SIOCAUTHW, struct fr_info **)
+	ioctl(fd, SIOCAUTHR, struct fr_info **)
+	ioctl(fd, SIOCATHST, struct fr_authstat **)
 .fi
 .PP
 The variations, SIOCADAFR vs. SIOCADIFR, allow operation on the two lists,
@@ -107,7 +107,7 @@ filter list, the number of the rule which it is to be inserted before must
 be put in the "fr_hits" field (the first rule is number 0).
 .LP
 .PP
-Flags which are recognised in fr_pass:
+Flags which are recognised in fr_flags:
 .nf
 
      FR_BLOCK        0x000001   /* do not allow packet to pass */
diff --git a/contrib/ipfilter/man/ipf.5 b/contrib/ipfilter/man/ipf.5
index 478d672..243edac 100644
--- a/contrib/ipfilter/man/ipf.5
+++ b/contrib/ipfilter/man/ipf.5
@@ -31,7 +31,7 @@ proto	= "proto" protocol .
 ip	= srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] .
 group	= [ "head" decnumber ] [ "group" decnumber ] .
 
-block	= "block" [ icmp[return-code] | "return-rst" ] .
+block	= "block" [ return-icmp[return-code] | "return-rst" ] .
 auth    = "auth" | "preauth" .
 log	= "log" [ "body" ] [ "first" ] [ "or-block" ] [ "level" loglevel ] .
 call	= "call" [ "now" ] function-name .
@@ -42,7 +42,7 @@ protocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber .
 srcdst	= "all" | fromto .
 fromto	= "from" [ "!" ] object "to" [ "!" ] object .
 
-icmp	= "return-icmp" | "return-icmp-as-dest" .
+return-icmp = "return-icmp" | "return-icmp-as-dest" .
 object	= addr [ port-comp | port-range ] .
 addr	= "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] .
 port-comp = "port" compare port-num .
diff --git a/contrib/ipfilter/man/ipmon.8 b/contrib/ipfilter/man/ipmon.8
index 61d6575..7cd98f6 100644
--- a/contrib/ipfilter/man/ipmon.8
+++ b/contrib/ipfilter/man/ipmon.8
@@ -149,7 +149,7 @@ show the packet data in hex.
 show the log header record data in hex.
 .SH DIAGNOSTICS
 \fBipmon\fP expects data that it reads to be consistent with how it should be
-saved and will abort if it fails an assertion which detects an anomoly in the
+saved and will abort if it fails an assertion which detects an anomaly in the
 recorded data.
 .SH FILES
 /dev/ipl
diff --git a/contrib/ipfilter/man/ipnat.4 b/contrib/ipfilter/man/ipnat.4
index ee385b7..6cba7b6 100644
--- a/contrib/ipfilter/man/ipnat.4
+++ b/contrib/ipfilter/man/ipnat.4
@@ -15,8 +15,10 @@ To add and delete rules to the NAT list, two 'basic' ioctls are provided
 for use.  The ioctl's are called as:
 .LP
 .nf
-	ioctl(fd, SIOCADNAT, struct ipnat *)
-	ioctl(fd, SIOCRMNAT, struct ipnat *)
+	ioctl(fd, SIOCADNAT, struct ipnat **)
+	ioctl(fd, SIOCRMNAT, struct ipnat **)
+	ioctl(fd, SIOCGNATS, struct natstat **)
+	ioctl(fd, SIOCGNATL, struct natlookup **)
 .fi
 .PP
 Unlike \fBipf(4)\fP, there is only a single list supported by the kernel NAT
diff --git a/contrib/ipfilter/mlf_ipl.c b/contrib/ipfilter/mlf_ipl.c
index f12e989..f6e7ad4 100644
--- a/contrib/ipfilter/mlf_ipl.c
+++ b/contrib/ipfilter/mlf_ipl.c
@@ -95,6 +95,8 @@ SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_chksrc, CTLFLAG_RW, &fr_chksrc, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
 	   &fr_tcpidletimeout, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RW,
+	   &fr_tcphalfclosed, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
 	   &fr_tcpclosewait, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
diff --git a/contrib/ipfilter/mlfk_ipl.c b/contrib/ipfilter/mlfk_ipl.c
index f869149..f96c57e 100644
--- a/contrib/ipfilter/mlfk_ipl.c
+++ b/contrib/ipfilter/mlfk_ipl.c
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: mlfk_ipl.c,v 2.1.2.3 2000/08/13 03:42:42 darrenr Exp $
+ * $Id: mlfk_ipl.c,v 2.1.2.4 2000/08/23 11:02:33 darrenr Exp $
  */
 
 
@@ -65,6 +65,8 @@ SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
 	   &fr_tcptimeout, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
 	   &fr_tcpclosed, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcphalfclosed, CTLFLAG_RW,
+	   &fr_tcphalfclosed, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
 	   &fr_udptimeout, 0, "");
 SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
diff --git a/contrib/ipfilter/perl/plog b/contrib/ipfilter/perl/plog
index b251b0c..208c6ea 100644
--- a/contrib/ipfilter/perl/plog
+++ b/contrib/ipfilter/perl/plog
@@ -1,14 +1,15 @@
 #!/usr/bin/perl -wT
 #
 # Author: Jefferson Ogata (JO317) <jogata@pobox.com>
-# Date: 2000/04/10
-# Version: 0.8
+# Date: 2000/04/22
+# Version: 0.10
 #
 # Please feel free to use or redistribute this program if you find it useful.
 # If you have suggestions, or even better, bits of new code, send them to me
 # and I will add them when I have time. The current version of this script
 # can always be found at the URL:
 #
+#    http://www.antibozo.net/ogata/webtools/plog.pl
 #    http://pobox.com/~ogata/webtools/plog.txt
 #
 # Parse ipmon output into a coherent form. This program only handles the
@@ -18,10 +19,10 @@
 #
 # EXAMPLES
 #
-# plog -A block,log < /var/log/ipf
+# plog -AF block,log < /var/log/ipf
 #
 #    Generate source and destination reports of all packets logged with
-#    block or log actions.
+#    block or log actions, and report TCP flags and keep state actions.
 #
 # plog -S -s ./services www.example.com < /var/log/ipf
 #
@@ -34,6 +35,14 @@
 #    lookups. This is handy for an initial pass to identify portscans or
 #    other aggressive traffic.
 #
+# plog -SFp 192.168.0.0/24 www.example.com/24 < /var/log/ipf
+#
+#    Generate a source report of all packets whose source or destination
+#    address is either in 192.168.0.0/24 or an address associated with
+#    the host www.example.com, report packet flags and perform paranoid
+#    hostname lookups. This is a handy usage for examining traffic more
+#    closely after identifying a potential attack.
+#
 # TODO
 #
 # - Handle output from ipmon -v.
@@ -44,6 +53,14 @@
 #
 # CHANGES
 #
+# 2000/04/22 (0.10):
+# - Restructured host name and address caches. Hosts are now cached using
+#   packed addresses as keys. Conversion to IPv6 should be simple now.
+# - Added paranoid hostname lookups.
+# - Added netmask qualifications for address arguments.
+# - Tweaked usage info.
+# 2000/04/20:
+# - Added parsing and tracking of TCP and state flags.
 # 2000/04/12 (0.9):
 # - Wasn't handling underscore in hostname,servicename fields; these may be
 #   logged using ipmon -n. Observation by <ark@eltex.ru>.
@@ -58,8 +75,7 @@
 #   slightly) from Andy Kreiling <Andy@ntcs-inc.com> and John Ladwig
 #   <jladwig@nts.umn.edu>.
 # - Added fix to handle new Solaris log format, e.g.:
-#     Nov 30 04:49:37 raoul ipmon[121]: [ID 702911 local0.warning] 04:49:36.420
-541 hme0 @0:34 b 205.152.16.6,58596 -> 204.60.220.24,113 PR tcp len 20 44
+#     Nov 30 04:49:37 raoul ipmon[121]: [ID 702911 local0.warning] 04:49:36.420541 hme0 @0:34 b 205.152.16.6,58596 -> 204.60.220.24,113 PR tcp len 20 44
 #   Fix thanks to Taso N. Devetzis <devetzis@SNET.Net>.
 # - Added services map option.
 # - Added options for generating only source/destination tables.
@@ -141,219 +157,251 @@ $me =~ s/^.*\///;
 # Map of log codes for various actions. Not all of these can occur, but
 # I've included everything in print_ipflog() from ipmon.c.
 my %acts = (
-    'p' => 'pass',
-    'P' => 'pass',
-    'b' => 'block',
-    'B' => 'block',
-    'L' => 'log',
+    'p'	=> 'pass',
+    'P'	=> 'pass',
+    'b'	=> 'block',
+    'B'	=> 'block',
+    'L'	=> 'log',
     'S' => 'short',
     'n' => 'nomatch',
 );
 
 # Map of ICMP types and their relevant codes.
 my %icmpTypeMap = (
-    0   => +{
-        name    => 'echorep',
-        codes   => +{0  => undef},
+    0	=> +{
+	name	=> 'echorep',
+	codes	=> +{0	=> undef},
     },
-    3   => +{
-        name    => 'unreach',
-        codes   => +{
-            0   => 'net-unr',
-            1   => 'host-unr',
-            2   => 'proto-unr',
-            3   => 'port-unr',
-            4   => 'needfrag',
-            5   => 'srcfail',
-            6   => 'net-unk',
-            7   => 'host-unk',
-            8   => 'isolate',
-            9   => 'net-prohib',
-            10  => 'host-prohib',
-            11  => 'net-tos',
-            12  => 'host-tos',
-            13  => 'filter-prohib',
-            14  => 'host-preced',
-            15  => 'preced-cutoff',
-        },
+    3	=> +{
+	name	=> 'unreach',
+	codes	=> +{
+	    0	=> 'net-unr',
+	    1	=> 'host-unr',
+	    2	=> 'proto-unr',
+	    3	=> 'port-unr',
+	    4	=> 'needfrag',
+	    5	=> 'srcfail',
+	    6	=> 'net-unk',
+	    7	=> 'host-unk',
+	    8	=> 'isolate',
+	    9	=> 'net-prohib',
+	    10	=> 'host-prohib',
+	    11	=> 'net-tos',
+	    12	=> 'host-tos',
+	    13	=> 'filter-prohib',
+	    14	=> 'host-preced',
+	    15	=> 'preced-cutoff',
+	},
     },
-    4   => +{
-        name    => 'squench',
-        codes   => +{0  => undef},
+    4	=> +{
+	name	=> 'squench',
+	codes	=> +{0	=> undef},
     },
-    5   => +{
-        name    => 'redir',
-        codes   => +{
-            0   => 'net',
-            1   => 'host',
-            2   => 'tos',
-            3   => 'tos-host',
-        },
+    5	=> +{
+	name	=> 'redir',
+	codes	=> +{
+	    0	=> 'net',
+	    1	=> 'host',
+	    2	=> 'tos',
+	    3	=> 'tos-host',
+	},
     },
-    6   => +{
-        name    => 'alt-host-addr',
-        codes   => +{
-            0   => 'alt-addr'
-        },
+    6	=> +{
+	name	=> 'alt-host-addr',
+	codes	=> +{
+	    0	=> 'alt-addr'
+	},
     },
-    8   => +{
-        name    => 'echo',
-        codes   => +{0  => undef},
+    8	=> +{
+	name	=> 'echo',
+	codes	=> +{0	=> undef},
     },
-    9   => +{
-        name    => 'routerad',
-        codes   => +{0  => undef},
+    9	=> +{
+	name	=> 'routerad',
+	codes	=> +{0	=> undef},
     },
-    10  => +{
-        name    => 'routersol',
-        codes   => +{0  => undef},
+    10	=> +{
+	name	=> 'routersol',
+	codes	=> +{0	=> undef},
     },
-    11  => +{
-        name    => 'timex',
-        codes   => +{
-            0   => 'in-transit',
-            1   => 'frag-assy',
-        },
+    11	=> +{
+	name	=> 'timex',
+	codes	=> +{
+	    0	=> 'in-transit',
+	    1	=> 'frag-assy',
+	},
     },
-    12  => +{
-        name    => 'paramprob',
-        codes   => +{
-            0   => 'ptr-err',
-            1   => 'miss-opt',
-            2   => 'bad-len',
-        },
+    12	=> +{
+	name	=> 'paramprob',
+	codes	=> +{
+	    0	=> 'ptr-err',
+	    1	=> 'miss-opt',
+	    2	=> 'bad-len',
+	},
     },
-    13  => +{
-        name    => 'timest',
-        codes   => +{0  => undef},
+    13	=> +{
+	name	=> 'timest',
+	codes	=> +{0	=> undef},
     },
-    14  => +{
-        name    => 'timestrep',
-        codes   => +{0  => undef},
+    14	=> +{
+	name	=> 'timestrep',
+	codes	=> +{0	=> undef},
     },
-    15  => +{
-        name    => 'inforeq',
-        codes   => +{0  => undef},
+    15	=> +{
+	name	=> 'inforeq',
+	codes	=> +{0	=> undef},
     },
-    16  => +{
-        name    => 'inforep',
-        codes   => +{0  => undef},
+    16	=> +{
+	name	=> 'inforep',
+	codes	=> +{0	=> undef},
     },
-    17  => +{
-        name    => 'maskreq',
-        codes   => +{0  => undef},
+    17	=> +{
+	name	=> 'maskreq',
+	codes	=> +{0	=> undef},
     },
-    18  => +{
-        name    => 'maskrep',
-        codes   => +{0  => undef},
+    18	=> +{
+	name	=> 'maskrep',
+	codes	=> +{0	=> undef},
     },
-    30  => +{
-        name    => 'tracert',
-        codes   => +{ },
+    30	=> +{
+	name	=> 'tracert',
+	codes	=> +{ },
     },
-    31  => +{
-        name    => 'dgram-conv-err',
-        codes   => +{ },
+    31	=> +{
+	name	=> 'dgram-conv-err',
+	codes	=> +{ },
     },
-    32  => +{
-        name    => 'mbl-host-redir',
-        codes   => +{ },
+    32	=> +{
+	name	=> 'mbl-host-redir',
+	codes	=> +{ },
     },
-    33  => +{
-        name    => 'ipv6-whereru?',
-        codes   => +{ },
+    33	=> +{
+	name	=> 'ipv6-whereru?',
+	codes	=> +{ },
     },
-    34  => +{
-        name    => 'ipv6-iamhere',
-        codes   => +{ },
+    34	=> +{
+	name	=> 'ipv6-iamhere',
+	codes	=> +{ },
     },
-    35  => +{
-        name    => 'mbl-reg-req',
-        codes   => +{ },
+    35	=> +{
+	name	=> 'mbl-reg-req',
+	codes	=> +{ },
     },
-    36  => +{
-        name    => 'mbl-reg-rep',
-        codes   => +{ },
+    36	=> +{
+	name	=> 'mbl-reg-rep',
+	codes	=> +{ },
     },
 );
 
 # Arguments we will parse from argument list.
-my $numeric = 0;        # Don't lookup hostnames.
-my $verbosity = 0;      # Bla' bla' bla'.
-my $sTable = 0;         # Generate source table.
-my $dTable = 0;         # Generate destination table.
-my $services = undef;   # Preload services table.
-my %selectHosts;        # Limit report to these hosts.
-my %selectActs;         # Limit report to these actions.
+my $numeric = 0;	# Don't lookup hostnames.
+my $paranoid = 0;	# Do paranoid hostname lookups.
+my $verbosity = 0;	# Bla' bla' bla'.
+my $sTable = 0;		# Generate source table.
+my $dTable = 0;		# Generate destination table.
+my @services = ();	# Preload services tables.
+my $showFlags = 0;	# Show TCP flag combinations.
+my %selectAddrs;	# Limit report to these hosts.
+my %selectActs;		# Limit report to these actions.
 
 # Parse argument list.
 while (defined ($_ = shift))
 {
     if (s/^-//)
     {
-        while (s/^([nSD\?hsA])//)
-        {
-            my $flag = $1;
-            if ($flag eq 'v')
-            {
-                ++$verbosity;
-            }
-            elsif ($flag eq 'n')
-            {
-                $numeric = 1;
-            }
-            elsif ($flag eq 'S')
-            {
-                $sTable = 1;
-            }
-            elsif ($flag eq 'D')
-            {
-                $dTable = 1;
-            }
-            elsif (($flag eq '?') || ($flag eq 'h'))
-            {
-                &usage (0);
-            }
-            else
-            {
-                my $arg = shift;
-                defined ($arg) || &usage (1, qq{-$flag requires an argument});
-                if ($flag eq 's')
-                {
-                    defined ($services) && &usage (1, qq{too many service maps});
-                    $services = $arg;
-                }
-                elsif ($flag eq 'A')
-                {
-                    my @acts = split (/,/, $arg);
-                    my $a;
-                    foreach $a (@acts)
-                    {
-                        my $aa;
-                        my $match = 0;
-                        foreach $aa (keys (%acts))
-                        {
-                            if ($acts{$aa} eq $a)
-                            {
-                                ++$match;
-                                $selectActs{$aa} = $a;
-                            }
-                        }
-                        $match || &usage (1, qq{unknown action $a});
-                    }
-                }
-            }
-        }
-
-        &usage (1, qq{unknown option: -$_}) if (length);
-
-        next;
+	while (s/^([vnpSD\?hsAF])//)
+	{
+	    my $flag = $1;
+	    if ($flag eq 'v')
+	    {
+		++$verbosity;
+	    }
+	    elsif ($flag eq 'n')
+	    {
+		$numeric = 1;
+	    }
+	    elsif ($flag eq 'p')
+	    {
+		$paranoid = 1;
+	    }
+	    elsif ($flag eq 'S')
+	    {
+		$sTable = 1;
+	    }
+	    elsif ($flag eq 'D')
+	    {
+		$dTable = 1;
+	    }
+	    elsif ($flag eq 'F')
+	    {
+		$showFlags = 1;
+	    }
+	    elsif (($flag eq '?') || ($flag eq 'h'))
+	    {
+		&usage (0);
+	    }
+	    else
+	    {
+		my $arg = shift;
+		defined ($arg) || &usage (1, qq{-$flag requires an argument});
+		if ($flag eq 's')
+		{
+		    push (@services, $arg);
+		}
+		elsif ($flag eq 'A')
+		{
+		    my @acts = split (/,/, $arg);
+		    my $a;
+		    foreach $a (@acts)
+		    {
+			my $aa;
+			my $match = 0;
+			foreach $aa (keys (%acts))
+			{
+			    if ($acts{$aa} eq $a)
+			    {
+				++$match;
+				$selectActs{$aa} = $a;
+			    }
+			}
+			$match || &usage (1, qq{unknown action $a});
+		    }
+		}
+	    }
+	}
+
+	&usage (1, qq{unknown option: -$_}) if (length);
+
+	next;
     }
 
     # Add host to hash of hosts we're interested in.
-    my $addr = &hostNumber ($_);
-    defined ($addr) || &usage (1, qq{cannot resolve hostname $_});
-    $selectHosts{$addr} = undef;
+    (/^(.+)\/([\d+\.]+)$/) || (/^(.+)$/) || &usage (1, qq{invalid CIDR address $_});
+    my ($addr, $mask) = ($1, $2);
+    my @addr = &hostAddrs ($addr);
+    (scalar (@addr)) || &usage (1, qq{cannot resolve hostname $_});
+    if (!defined ($mask))
+    {
+	$mask = (2 ** 32) - 1;
+    }
+    elsif (($mask =~ /^\d+$/) && ($mask <= 32))
+    {
+	$mask = (2 ** 32) - 1 - ((2 ** (32 - $mask)) - 1);
+    }
+    elsif (defined ($mask = &isDottedAddr ($mask)))
+    {
+	$mask = &integerAddr ($mask);
+    }
+    else
+    {
+	&usage (1, qq{invalid CIDR address $_});
+    }
+    foreach $addr (@addr)
+    {
+	# Save mask unless we already have a less specific one for this address.
+	my $a = &integerAddr ($addr) & $mask;
+	$selectAddrs{$a} = $mask unless (exists ($selectAddrs{$a}) && ($selectAddrs{$a} < $mask));
+    }
 }
 
 # Which tables will we generate?
@@ -363,7 +411,7 @@ push (@dirs, 'd') if ($dTable);
 push (@dirs, 's') if ($sTable);
 
 # Are we interested in specific hosts?
-my $selectHosts = scalar (keys (%selectHosts));
+my $selectAddrs = scalar (keys (%selectAddrs));
 
 # Are we interested in specific actions?
 if (scalar (keys (%selectActs)) == 0)
@@ -375,42 +423,45 @@ if (scalar (keys (%selectActs)) == 0)
 # Isn't it cool that we can use the same hash for both?
 my %pn;
 
-# Preload any services map.
-if (defined ($services))
+# Preload any services maps.
+my $sm;
+foreach $sm (@services)
 {
-    my $sf = new IO::File ($services, "r");
-    defined ($sf) || &quit (1, qq{cannot open services file $services});
+    my $sf = new IO::File ($sm, "r");
+    defined ($sf) || &quit (1, qq{cannot open services file $sm});
 
     while (defined ($_ = $sf->getline ()))
     {
-        my $text = $_;
-        chomp;
-        s/#.*$//;
-        s/\s+$//;
-        next unless (length);
-        my ($name, $spec, @aliases) = split (/\s+/);
-        ($spec =~ /^([\w\-]+)\/([\w\-]+)$/)
-            || &quit (1, qq{$services:$.: invalid definition: $text});
-        my ($pnum, $proto) = ($1, $2);
-
-        # Enter service definition in pn hash both forwards and backwards.
-        my $port;
-        my $pname;
-        foreach $port ($name, @aliases)
-        {
-            $pname = "$pnum/$proto";
-            $pn{$pname} = $port;
-        }
-        $pname = "$name/$proto";
-        $pn{$pname} = $pnum;
+	my $text = $_;
+	chomp;
+	s/#.*$//;
+	s/\s+$//;
+	next unless (length);
+	my ($name, $spec, @aliases) = split (/\s+/);
+	($spec =~ /^([\w\-]+)\/([\w\-]+)$/)
+	    || &quit (1, qq{$sm:$.: invalid definition: $text});
+	my ($pnum, $proto) = ($1, $2);
+
+	# Enter service definition in pn hash both forwards and backwards.
+	my $port;
+	my $pname;
+	foreach $port ($name, @aliases)
+	{
+	    $pname = "$pnum/$proto";
+	    $pn{$pname} = $port;
+	}
+	$pname = "$name/$proto";
+	$pn{$pname} = $pnum;
     }
 
     $sf->close ();
 }
 
-# Again, we can use the same hash for both host name -> IP mappings and
-# IP -> name mappings.
-my %ip;
+# Cache for host name -> addr mappings.
+my %ipAddr;
+
+# Cache for host addr -> name mappings.
+my %ipName;
 
 # Hash for protocol number <--> name mappings.
 my %pr;
@@ -434,16 +485,16 @@ while (<STDIN>)
     my ($log);
     if (s/^\w+\s+\d+\s+\d+:\d+:\d+\s+(?:\d\w:)?[\w\.\-]+\s+\S*ipmon\[\d+\]:\s+(?:\[ID\s+\d+\s+[\w\.]+\]\s+)?\d+:\d+:\d+\.\d+\s+//)
     {
-        $log = $_;
+	$log = $_;
     }
     elsif (s/^(?:\d+\/\d+\/\d+)\s+(?:\d+:\d+:\d+\.\d+)\s+//)
     {
-        $log = $_;
+	$log = $_;
     }
     else
     {
-        # It don't look like no ipmon output to me, baby.
-        next;
+	# It don't look like no ipmon output to me, baby.
+	next;
     }
     next unless (defined ($log));
 
@@ -455,11 +506,11 @@ while (<STDIN>)
     # number, "PR", a protocol name or number, "len", a header length, a
     # packet length (which will be in parentheses for protocols other than
     # TCP, UDP, or ICMP), and maybe some additional info.
-    my @fields = ($log =~ /^(?:(\d+)x)?\s*(\w+)\s+@(\d+):(\d+)\s+(\w)\s+([\w\-\..,]+)\s+->\s+([\w\-\.,]+)\s+PR\s+(\w+)\s+len\s+(\d+)\s+\(?(\d+)\)?\s*(.*)$/ox);
+    my @fields = ($log =~ /^(?:(\d+)x)?\s*(\w+)\s+@(\d+):(\d+)\s+(\w)\s+([\w\-\.,]+)\s+->\s+([\w\-\.,]+)\s+PR\s+(\w+)\s+len\s+(\d+)\s+\(?(\d+)\)?\s*(.*)$/ox);
     unless (scalar (@fields))
     {
-        print STDERR "$me:$.: cannot parse: $_\n";
-        next;
+	print STDERR "$me:$.: cannot parse: $_\n";
+	next;
     }
     my ($count, $if, $group, $rule, $act, $src, $dest, $proto, $hlen, $len, $more) = @fields;
 
@@ -469,102 +520,131 @@ while (<STDIN>)
     # Packet count defaults to 1.
     $count = 1 unless (defined ($count));
 
-    my ($sport, $dport);
+    my ($sport, $dport, @flags);
 
     if ($proto eq 'icmp')
     {
-        if ($more =~ s/^icmp (\d+)\/(\d+)\s*//)
-        {
-            # We save icmp type and code in both sport and dport. This
-            # allows us to sort icmp packets using the normal port-sorting
-            # code.
-            $dport = $sport = "$1.$2";
-        }
-        else
-        {
-            $sport = '';
-            $dport = '';
-        }
+	if ($more =~ s/^icmp (\d+)\/(\d+)\s*//)
+	{
+	    # We save icmp type and code in both sport and dport. This
+	    # allows us to sort icmp packets using the normal port-sorting
+	    # code.
+	    $dport = $sport = "$1.$2";
+	}
+	else
+	{
+	    $sport = '';
+	    $dport = '';
+	}
     }
     else
     {
-        if ($src =~ s/,([\-\w]+)$//)
-        {
-            $sport = &portSimplify ($1, $proto);
-        }
-        else
-        {
-            $sport = '';
-        }
-        if ($dest =~ s/,([\-\w]+)$//)
-        {
-            $dport = &portSimplify ($1, $proto);
-        }
-        else
-        {
-            $dport = '';
-        }
+	if ($showFlags)
+	{
+	    if (($proto eq 'tcp') && ($more =~ s/^\-([A-Z]+)\s*//))
+	    {
+		push (@flags, $1);
+	    }
+	    if ($more =~ s/^K\-S\s*//)
+	    {
+		push (@flags, 'state');
+	    }
+	}
+	if ($src =~ s/,([\-\w]+)$//)
+	{
+	    $sport = &portSimplify ($1, $proto);
+	}
+	else
+	{
+	    $sport = '';
+	}
+	if ($dest =~ s/,([\-\w]+)$//)
+	{
+	    $dport = &portSimplify ($1, $proto);
+	}
+	else
+	{
+	    $dport = '';
+	}
     }
 
     # Make sure addresses are numeric at this point. We want to sort by
-    # IP address later. This has got to do some weird things, but if you
-    # want to use ipmon -n, be ready for weirdness.
+    # IP address later. If the hostname doesn't resolve, punt. If you
+    # must use ipmon -n, be ready for weirdness. Use only the first
+    # address returned.
     my $x;
-    $x = &hostNumber ($src);
+    $x = (&hostAddrs ($src))[0];
     unless (defined ($x))
     {
-        print STDERR "$me:$.: cannot resolve hostname $src\n";
-        next;
+	print STDERR "$me:$.: cannot resolve hostname $src\n";
+	next;
     }
     $src = $x;
-    $x = &hostNumber ($dest);
+    $x = (&hostAddrs ($dest))[0];
     unless (defined ($x))
     {
-        print STDERR "$me:$.: cannot resolve hostname $dest\n";
-        next;
+	print STDERR "$me:$.: cannot resolve hostname $dest\n";
+	next;
     }
     $dest = $x;
 
     # Skip hosts we're not interested in.
-    next if ($selectHosts && !(exists ($selectHosts{$src}) || exists ($selectHosts{$dest})));
+    if ($selectAddrs)
+    {
+	my ($a, $m);
+	my $s = &integerAddr ($src);
+	my $d = &integerAddr ($dest);
+	my $cute = 0;
+	while (($a, $m) = each (%selectAddrs))
+	{
+	    if ((($s & $m) == $a) || (($d & $m) == $a))
+	    {
+		$cute = 1;
+		last;
+	    }
+	}
+	next unless ($cute);
+    }
 
     # Convert proto to proto number.
     $proto = &protoNumber ($proto);
 
     sub countPacket
     {
-        my ($host, $dir, $peer, $proto, $count, $packet) = @_;
+	my ($host, $dir, $peer, $proto, $count, $packet, @flags) = @_;
 
-        # Make sure host is in the hosts hash.
-        $hosts{$host} =
-            +{
-                'd'     => +{ },
-                's'     => +{ },
-            } unless (exists ($hosts{$host}));
+	# Make sure host is in the hosts hash.
+	$hosts{$host} =
+	    +{
+		'd'	=> +{ },
+		's'	=> +{ },
+	    } unless (exists ($hosts{$host}));
 
-        # Get the source/destination traffic hash for the host in question.
-        my $trafficHash = $hosts{$host}->{$dir};
+	# Get the source/destination traffic hash for the host in question.
+	my $trafficHash = $hosts{$host}->{$dir};
 
-        # Make sure there's a hash for the peer.
-        $trafficHash->{$peer} = +{ } unless (exists ($trafficHash->{$peer}));
+	# Make sure there's a hash for the peer.
+	$trafficHash->{$peer} = +{ } unless (exists ($trafficHash->{$peer}));
 
-        # Make sure the peer hash has a hash for the protocol number.
-        my $peerHash = $trafficHash->{$peer};
-        $peerHash->{$proto} = +{ } unless (exists ($peerHash->{$proto}));
+	# Make sure the peer hash has a hash for the protocol number.
+	my $peerHash = $trafficHash->{$peer};
+	$peerHash->{$proto} = +{ } unless (exists ($peerHash->{$proto}));
 
-        # Make sure there's a counter for this packet type in the proto hash.
-        my $protoHash = $peerHash->{$proto};
-        $protoHash->{$packet} = 0 unless (exists ($protoHash->{$packet}));
+	# Make sure there's a counter for this packet type in the proto hash.
+	my $protoHash = $peerHash->{$proto};
+	$protoHash->{$packet} = +{ '' => 0 } unless (exists ($protoHash->{$packet}));
 
-        # Increment the counter.
-        $protoHash->{$packet} += $count;
+	# Increment the counter and mark flags.
+	my $packetHash = $protoHash->{$packet};
+	$packetHash->{''} += $count;
+	map { $packetHash->{$_} = undef; } (@flags);
     }
 
     # Count the packet as outgoing traffic from the source address.
-    &countPacket ($src, 's', $dest, $proto, $count, "$sport:$dport:$if:$act") if ($sTable);
+    &countPacket ($src, 's', $dest, $proto, $count, "$sport:$dport:$if:$act", @flags) if ($sTable);
 
     # Count the packet as incoming traffic to the destination address.
-    &countPacket ($dest, 'd', $src, $proto, $count, "$dport:$sport:$if:$act") if ($dTable);
+    &countPacket ($dest, 'd', $src, $proto, $count, "$dport:$sport:$if:$act", @flags) if ($dTable);
 }
 
 my $dir;
@@ -579,67 +659,76 @@ foreach $dir (@dirs)
 
     sub ipSort
     {
-        my @a = split (/\./, $a);
-        my @b = split (/\./, $b);
-        $a[0] <=> $b[0] || $a[1] <=> $b[1] || $a[2] <=> $b[2] || $a[3] <=> $b[3];
+	&integerAddr ($a) <=> &integerAddr ($b);
     }
 
     sub packetSort
     {
-        my ($asport, $adport, $aif, $aact) = split (/:/, $a);
-        my ($bsport, $bdport, $bif, $bact) = split (/:/, $b);
-        $bact cmp $aact || $aif cmp $bif || $asport <=> $bsport || $adport <=> $bdport;
+	my ($asport, $adport, $aif, $aact) = split (/:/, $a);
+	my ($bsport, $bdport, $bif, $bact) = split (/:/, $b);
+	$bact cmp $aact || $aif cmp $bif || $asport <=> $bsport || $adport <=> $bdport;
     }
 
     my $host;
     foreach $host (sort ipSort (keys %hosts))
     {
-        my $traffic = $hosts{$host}->{$dir};
-
-        # Skip hosts with no traffic.
-        next unless (scalar (keys (%{$traffic})));
-
-        if ($numeric)
-        {
-            print "$host\n";
-        }
-        else
-        {
-            print &hostName ($host), " \[$host\]\n";
-        }
-
-        my $peer;
-        foreach $peer (sort ipSort (keys %{$traffic}))
-        {
-            my $peerHash = $traffic->{$peer};
-            my $peerName = &hostName ($peer);
-            my $proto;
-            foreach $proto (sort (keys (%{$peerHash})))
-            {
-                my $protoHash = $peerHash->{$proto};
-                my $protoName = &protoName ($proto);
-
-                my $packet;
-                foreach $packet (sort packetSort (keys %{$protoHash}))
-                {
-                    my ($sport, $dport, $if, $act) = split (/:/, $packet);
-                    my $count = $protoHash->{$packet};
-                    $act = '?' unless (defined ($act = $acts{$act}));
-                    if (($protoName eq 'tcp') || ($protoName eq 'udp'))
-                    {
-                        printf ("    %-6s %7s %4d %4s %16s %2s %s.%s\n", $if, $act, $count, $protoName, &portName ($sport, $protoName), $arrow, $peerName, &portName ($dport, $protoName));
-                    }
-                    elsif ($protoName eq 'icmp')
-                    {
-                        printf ("    %-6s %7s %4d %4s %16s %2s %s\n", $if, $act, $count, $protoName, &icmpType ($sport), $arrow, $peerName);
-                    }
-                    else
-                    {
-                        printf ("    %-6s %7s %4d %4s %16s %2s %s\n", $if, $act, $count, $protoName, '', $arrow, $peerName);
-                    }
-                }
-            }
-        }
+	my $traffic = $hosts{$host}->{$dir};
+
+	# Skip hosts with no traffic.
+	next unless (scalar (keys (%{$traffic})));
+
+	if ($numeric)
+	{
+	    print &dottedAddr ($host), "\n";
+	}
+	else
+	{
+	    print &hostName ($host), " \[", &dottedAddr ($host), "\]\n";
+	}
+
+	my $peer;
+	foreach $peer (sort ipSort (keys %{$traffic}))
+	{
+	    my $peerHash = $traffic->{$peer};
+	    my $peerName = ($numeric ? &dottedAddr ($peer) : &hostName ($peer));
+	    my $proto;
+	    foreach $proto (sort (keys (%{$peerHash})))
+	    {
+		my $protoHash = $peerHash->{$proto};
+		my $protoName = &protoName ($proto);
+
+		my $packet;
+		foreach $packet (sort packetSort (keys %{$protoHash}))
+		{
+		    my ($sport, $dport, $if, $act) = split (/:/, $packet);
+		    my $packetHash = $protoHash->{$packet};
+		    my $count = $packetHash->{''};
+		    $act = '?' unless (defined ($act = $acts{$act}));
+		    if (($protoName eq 'tcp') || ($protoName eq 'udp'))
+		    {
+			printf ("    %-6s %7s %4d %4s %16s %2s %s.%s", $if, $act, $count, $protoName, &portName ($sport, $protoName), $arrow, $peerName, &portName ($dport, $protoName));
+		    }
+		    elsif ($protoName eq 'icmp')
+		    {
+			printf ("    %-6s %7s %4d %4s %16s %2s %s", $if, $act, $count, $protoName, &icmpType ($sport), $arrow, $peerName);
+		    }
+		    else
+		    {
+			printf ("    %-6s %7s %4d %4s %16s %2s %s", $if, $act, $count, $protoName, '', $arrow, $peerName);
+		    }
+		    if ($showFlags)
+		    {
+			my @flags = sort (keys (%{$packetHash}));
+			if (scalar (@flags))
+			{
+			    shift (@flags);
+			    print ' (', join (',', @flags), ')' if (scalar (@flags));
+			}
+		    }
+		    print "\n";
+		}
+	    }
+	}
     }
 
     print "\n";
@@ -658,8 +747,8 @@ sub portName
     my $pname = "$port/$proto";
     unless (exists ($pn{$pname}))
     {
-        my $name = getservbyport ($port, $proto);
-        $pn{$pname} = (defined ($name) ? $name : ($port <= 1023 ? $port : '<high>'));
+	my $name = getservbyport ($port, $proto);
+	$pn{$pname} = (defined ($name) ? $name : ($port <= 1023 ? $port : '<high>'));
     }
     return $pn{$pname};
 }
@@ -672,16 +761,16 @@ sub portNumber
     my $pname = "$port/$proto";
     unless (exists ($pn{$pname}))
     {
-        my $number = getservbyname ($port, $proto);
-        unless (defined ($number))
-        {
-            # I don't think we need to recover from this. How did the port
-            # name get into the log file if we can't find it? Log file from
-            # a different machine? Fix /etc/services on this one if that's
-            # your problem.
-            die ("Unrecognized port name \"$port\" at $.");
-        }
-        $pn{$pname} = $number;
+	my $number = getservbyname ($port, $proto);
+	unless (defined ($number))
+	{
+	    # I don't think we need to recover from this. How did the port
+	    # name get into the log file if we can't find it? Log file from
+	    # a different machine? Fix /etc/services on this one if that's
+	    # your problem.
+	    die ("Unrecognized port name \"$port\" at $.");
+	}
+	$pn{$pname} = $number;
     }
     return $pn{$pname};
 }
@@ -695,7 +784,7 @@ sub portSimplify
 
     # Make sure port is numeric.
     $port = &portNumber ($port, $proto)
-        unless ($port =~ /^\d+$/);
+	unless ($port =~ /^\d+$/);
 
     # Look up port name.
     my $portName = &portName ($port, $proto);
@@ -708,61 +797,130 @@ sub portSimplify
     return $port;
 }
 
-# Translates a dotted quad into a hostname. Don't pass names to this
-# function.
+# Translates a numeric address into a hostname. Pass only packed numeric
+# addresses to this routine.
 sub hostName
 {
     my $ip = shift;
-    return $ip if ($numeric);
-    unless (exists ($ip{$ip}))
-    {
-        my $addr = inet_aton ($ip);
-        my $name = gethostbyaddr ($addr, AF_INET);
-        if (defined ($name))
-        {
-            $ip{$ip} = $name;
-
-            # While we're at it, cache the forward lookup.
-            $ip{$name} = $ip;
-        }
-        else
-        {
-            # Just map the IP address to itself. There's no reverse.
-            $ip{$ip} = $ip;
-        }
-    }
-    return $ip{$ip};
+    return $ipName{$ip} if (exists ($ipName{$ip}));
+
+    # Do an inverse lookup on the address.
+    my $name = gethostbyaddr ($ip, AF_INET);
+    unless (defined ($name))
+    {
+	# Inverse lookup failed, so map the IP address to its dotted
+	# representation and cache that.
+	$ipName{$ip} = &dottedAddr ($ip);
+	return $ipName{$ip};
+    }
+
+    # For paranoid hostname lookups.
+    if ($paranoid)
+    {
+	# If this address already matches, we're happy.
+	unless (exists ($ipName{$ip}) && (lc ($ipName{$ip}) eq lc ($name)))
+	{
+	    # Do a forward lookup on the resulting name.
+	    my @addr = &hostAddrs ($name);
+	    my $match = 0;
+
+	    # Cache the forward lookup results for future inverse lookups,
+	    # but don't stomp on inverses we've already cached, even if they
+	    # are questionable. We want to generate consistent output, and
+	    # the cache is growing incrementally.
+	    foreach (@addr)
+	    {
+		$ipName{$_} = $name unless (exists ($ipName{$_}));
+		$match = 1 if ($_ eq $ip);
+	    }
+
+	    # Was this one of the addresses? If not, tack on a ?.
+	    $name .= '?' unless ($match);
+	}
+    }
+    else
+    {
+	# Just believe it and cache it.
+	$ipName{$ip} = $name;
+    }
+
+    return $name;
 }
 
-# Translates a hostname or dotted quad into a dotted quad.
-sub hostNumber
+# Translates a hostname or dotted address into a list of packed numeric
+# addresses.
+sub hostAddrs
 {
     my $name = shift;
-    if ($name =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/)
-    {
-        # Return original value for dotted quads.
-        my $or = int ($1) | int ($2) | int ($3) | int ($4);
-        return $name if ($or == ($or & 0xff));
-    }
-    unless (exists ($ip{$name}))
-    {
-        my $addr = inet_aton ($name);
-        unless (defined ($addr))
-        {
-            # Again, I don't think we need to recover from this. If we can't
-            # resolve a hostname that ended up in the log file, punt. We
-            # want to be able to sort hosts by IP address later, and letting
-            # hostnames through will snarl up that code. Users of ipmon -n
-            # will have to grin and bear it for now.
-            return undef;
-        }
-        my $ip = inet_ntoa ($addr);
-        $ip{$name} = $ip;
-
-        # While we're at it, cache the reverse lookup.
-        $ip{$ip} = $name;
-    }
-    return $ip{$name};
+    my $ip;
+
+    # Check if it's a dotted representation.
+    return ($ip) if (defined ($ip = &isDottedAddr ($name)));
+
+    # Return result from cache.
+    $name = lc ($name);
+    return @{$ipAddr{$name}} if (exists ($ipAddr{$name}));
+
+    # Look up the addresses.
+    my @addr = gethostbyname ($name);
+    splice (@addr, 0, 4);
+
+    unless (scalar (@addr))
+    {
+	# Again, I don't think we need to recover from this gracefully.
+	# If we can't resolve a hostname that ended up in the log file,
+	# punt. We want to be able to sort hosts by IP address later,
+	# and letting hostnames through will snarl up that code. Users
+	# of ipmon -n will have to grin and bear it for now. The
+	# functions that get undef back should treat it as an error or
+	# as some default address, e.g. 0 just to make things work.
+	return ();
+    }
+
+    $ipAddr{$name} = [ @addr ];
+    return @{$ipAddr{$name}};
+}
+
+# If the argument is a valid dotted address, returns the corresponding
+# packed numeric address, otherwise returns undef.
+sub isDottedAddr
+{
+    my $addr = shift;
+    if ($addr =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/)
+    {
+	my @a = (int ($1), int ($2), int ($3), int ($4));
+	foreach (@a)
+	{
+	    return undef if ($_ >= 256);
+	}
+	return pack ('C*', @a);
+    }
+    return undef;
+}
+
+# Unpacks a packed numeric address and returns an integer representation.
+sub integerAddr
+{
+    my $addr = shift;
+    return unpack ('N', $addr);
+
+    # The following is for generalized IPv4/IPv6 stuff. For now, it's a
+    # lot faster to assume IPv4.
+    my @a = unpack ('C*', $addr);
+    my $a = 0;
+    while (scalar (@a))
+    {
+	$a = ($a << 8) | shift (@a);
+    }
+    return $a;
+}
+
+# Unpacks a packed numeric address into a dotted representation.
+sub dottedAddr
+{
+    my $addr = shift;
+    my @a = unpack ('C*', $addr);
+    return join ('.', @a);
 }
 
 # Translates a protocol number into a protocol name, or a number if no name
@@ -773,15 +931,15 @@ sub protoName
     return $code if ($code !~ /^\d+$/);
     unless (exists ($pr{$code}))
     {
-        my $name = scalar (getprotobynumber ($code));
-        if (defined ($name))
-        {
-            $pr{$code} = $name;
-        }
-        else
-        {
-            $pr{$code} = $code;
-        }
+	my $name = scalar (getprotobynumber ($code));
+	if (defined ($name))
+	{
+	    $pr{$code} = $name;
+	}
+	else
+	{
+	    $pr{$code} = $code;
+	}
     }
     return $pr{$code};
 }
@@ -793,15 +951,15 @@ sub protoNumber
     return $name if ($name =~ /^\d+$/);
     unless (exists ($pr{$name}))
     {
-        my $code = scalar (getprotobyname ($name));
-        if (defined ($code))
-        {
-            $pr{$name} = $code;
-        }
-        else
-        {
-            $pr{$name} = $name;
-        }
+	my $code = scalar (getprotobyname ($name));
+	if (defined ($code))
+	{
+	    $pr{$name} = $code;
+	}
+	else
+	{
+	    $pr{$name} = $name;
+	}
     }
     return $pr{$name};
 }
@@ -821,12 +979,12 @@ sub icmpType
     my $codeName;
     if (exists ($info->{codes}->{$code}))
     {
-        $codeName = $info->{codes}->{$code};
-        $codeName = (defined ($codeName) ? "/$codeName" : '');
+	$codeName = $info->{codes}->{$code};
+	$codeName = (defined ($codeName) ? "/$codeName" : '');
     }
     else
     {
-        $codeName = "/$code";
+	$codeName = "/$code";
     }
     return "$typeName$codeName";
 }
@@ -847,11 +1005,11 @@ sub usage
 
     if (scalar (@msg))
     {
-        print STDERR "$me: ", join ("\n", @msg), "\n\n";
+	print STDERR "$me: ", join ("\n", @msg), "\n\n";
     }
 
-    print STDERR <<EOT;
-usage: $me [-n] [-S] [-D] [-s servicemap] [-A act1,...] host...
+    print <<EOT;
+usage: $me [-nSDF] [-s servicemap] [-A act1,...] [address...]
 
 Parses logging from ipmon and presents it in a comprehensible format. This
 program generates two reports: one organized by source address and another
@@ -862,24 +1020,26 @@ destination address and port are counted as a single entry. Any port number
 greater than 1023 that does not match an entry in the services table is treated
 as a "high" port; all high ports are coalesced into the same entry. The fields
 for the source address report are:
-    iface action packet-count proto src-port dest-ip dest-port
+    iface action packet-count proto src-port dest-host.dest-port \[\(flags\)\]
 The fields for the destination address report are:
-    iface action packet-count proto dest-port src-ip src-port
+    iface action packet-count proto dest-port src-host.src-port \[\(flags\)\]
 
 Options are:
 -n           Disable hostname lookups, and report only IP addresses.
+-p           Perform paranoid hostname lookups.
 -S           Generate a source address report.
 -D           Generate a destination address report.
+-F           Show all flag combinations associated with packets.
 -s map       Supply an alternate services map to be preloaded. The map should
-             be in the same format as /etc/services. Any service name not found
+	     be in the same format as /etc/services. Any service name not found
              in the map will be looked for in the system services file.
--A act1,...  Limit the report to the specified actions. The possible actions ar
-e
-             pass, block, log, short, and nomatch.
+-A act1,...  Limit the report to the specified actions. The possible actions
+	     are pass, block, log, short, and nomatch.
 
-If any hostnames are supplied on the command line, the report is limited to
-these hosts. If a host has multiple addresses, only the first address will be
-considered.
+If any addresses are supplied on the command line, the report is limited to
+these hosts. Addresses may be given as dotted IP addresses or hostnames, and
+may be qualified with netmasks in CIDR \(/24\) or dotted \(/255.255.255.0\) format.
+If a hostname resolves to multiple addresses, all addresses are used.
 
 If neither -S nor -D is given, both reports are generated.
 
@@ -899,5 +1059,3 @@ EOT
     exit ($ec);
 }
 
-
-
diff --git a/contrib/ipfilter/rules/BASIC.NAT b/contrib/ipfilter/rules/BASIC.NAT
index df041d1..213e338 100644
--- a/contrib/ipfilter/rules/BASIC.NAT
+++ b/contrib/ipfilter/rules/BASIC.NAT
@@ -8,6 +8,12 @@
 #
 # If we have only 1 valid IP address from our ISP, then we do this:
 #
+# To make ftp work, using the internal ftp proxy, use:
+#
+map ppp0 w.x.y.z/24 -> a.b.c.d/32 proxy port ftp ftp/tcp
+#
+# For normal TCP/UDP and other IP protocols
+#
 map ppp0 w.x.y.z/24 -> a.b.c.d/32 portmap tcp/udp 40000:60000
 map ppp0 w.x.y.z/24 -> a.b.c.d/32
 #
@@ -38,8 +44,3 @@ map ppp0 w.x.y.z/24 -> a.b.c.d/32
 #map ppp0 w.x.y.q/32 -> a.b.c.J/32
 #map ppp0 w.x.y.p/32 -> a.b.c.K/32 portmap tcp/udp 40000:60000
 #map ppp0 w.x.y.p/32 -> a.b.c.K/32
-#
-# To make ftp work, using the internal ftp proxy, use:
-#
-map ppp0 w.x.y.z/24 -> a.b.c.d/32 proxy port ftp ftp/tcp
-#
-- 
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