This commit was generated by cvs2svn to compensate for changes in r22514,

which included commits to RCS files with non-trunk default branches.

189 files changed, 28807 insertions, 0 deletions

diff --git a/contrib/ipfilter/BNF b/contrib/ipfilter/BNF
new file mode 100644
index 0000000..7cb556e
--- /dev/null
+++ b/contrib/ipfilter/BNF
@@ -0,0 +1,64 @@
+filter-rule = [ insert ] action in-out [ options ] [ tos ] [ ttl ]
+	      [ proto ] [ ip ] .
+
+insert	= "@" decnumber .
+action	= block | "pass" | log | "count" | call .
+in-out	= "in" | "out" .
+options	= [ log ] [ "quick" ] [ "on" interface-name [ dup ] [ froute ] ] .
+tos	= "tos" decnumber | "tos" hexnumber .
+ttl	= "ttl" decnumber .
+proto	= "proto" protocol .
+ip	= srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] .
+
+block	= "block" [ "return-icmp"[return-code] | "return-rst" ] .
+log	= "log" [ "body" ] [ "first" ] [ "or-block" ] .
+call	= "call" [ "now" ] function-name .
+dup	= "dup-to" interface-name[":"ipaddr] .
+froute	= "fastroute" | "to" interface-name .
+protocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber .
+srcdst	= "all" | fromto .
+fromto	= "from" object "to" object .
+
+object	= addr [ port-comp | port-range ] .
+addr	= "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] .
+port-comp = "port" compare port-num .
+port-range = "port" port-num range port-num .
+flags	= "flags" flag { flag } [ "/" flag { flag } ] .
+with	= "with" | "and" .
+icmp	= "icmp-type" icmp-type [ "code" decnumber ] .
+return-code = "("icmp-code")" .
+keep	= "keep" "state" | "keep" "frags" .
+
+nummask	= host-name [ "/" decnumber ] .
+host-name = ipaddr | hostname | "any" .
+ipaddr	= host-num "." host-num "." host-num "." host-num .
+host-num = digit [ digit [ digit ] ] .
+port-num = service-name | decnumber .
+
+withopt = [ "not" | "no" ] opttype [ withopt ] .
+opttype = "ipopts" | "short" | "frag" | "opt" ipopts  .
+optname	= ipopts [ "," optname ] .
+ipopts  = optlist | "sec-class" [ secname ] .
+secname	= seclvl [ "," secname ] .
+seclvl  = "unclass" | "confid" | "reserv-1" | "reserv-2" | "reserv-3" |
+	  "reserv-4" | "secret" | "topsecret" .
+icmp-type = "unreach" | "echo" | "echorep" | "squench" | "redir" |
+	    "timex" | "paramprob" | "timest" | "timestrep" | "inforeq" |
+	    "inforep" | "maskreq" | "maskrep"  | decnumber .
+icmp-code = decumber | "net-unr" | "host-unr" | "proto-unr" | "port-unr" |
+	    "needfrag" | "srcfail" | "net-unk" | "host-unk" | "isolate" |
+	    "net-prohib" | "host-prohib" | "net-tos" | "host-tos" .
+optlist	= "nop" | "rr" | "zsu" | "mtup" | "mtur" | "encode" | "ts" | "tr" |
+	  "sec" | "lsrr" | "e-sec" | "cipso" | "satid" | "ssrr" | "addext" |
+	  "visa" | "imitd" | "eip" | "finn" .
+
+hexnumber = "0" "x" hexstring .
+hexstring = hexdigit [ hexstring ] .
+decnumber = digit [ decnumber ] .
+
+compare = "=" | "!=" | "<" | ">" | "<=" | ">=" | "eq" | "ne" | "lt" | "gt" |
+	  "le" | "ge" .
+range	= "<>" | "><" .
+hexdigit = digit | "a" | "b" | "c" | "d" | "e" | "f" .
+digit	= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" .
+flag	= "F" | "S" | "R" | "P" | "A" | "U" .
diff --git a/contrib/ipfilter/COMPILE.2.5 b/contrib/ipfilter/COMPILE.2.5
new file mode 100644
index 0000000..ae550f8
--- /dev/null
+++ b/contrib/ipfilter/COMPILE.2.5
@@ -0,0 +1,11 @@
+
+If you get the following error whilst compiling:
+
+In file included from /usr/local/lib/gcc-lib/sparc-sun-solaris2.3/2.6.3/include/sys/user.h:48,
+                 from /usr/include/sys/file.h:15,
+                 from ../ip_nat.c:15:
+/usr/include/sys/psw.h:19: #error Kernel include of psw.h
+
+Remove (comment out) the line in
+/usr/local/lib/gcc-lib/sparc-sun-solaris2.3/2.6.3include/sys/user.h
+which includes psw.h
diff --git a/contrib/ipfilter/FWTK/README b/contrib/ipfilter/FWTK/README
new file mode 100644
index 0000000..216d205
--- /dev/null
+++ b/contrib/ipfilter/FWTK/README
@@ -0,0 +1,16 @@
+
+There are two patch files in this directory, each allowing for the Firewall
+Toolkit to be used in a transparent proxy configuration.
+
+ftp-gw.diff	- A patch written by myself for use only with IP Filter and
+		  ftp-gw from the Firewall Toolkit.
+
+fwtkp		- A set of patches written by James B. Croall (jcroall@foo.org)
+		  for use with both IP Filter and ipfwadm (for Linux) and more
+		  of the various FWTK gateway plugins, including:
+		  ftp-gw http-gw plug-gw rlogin-gw tn-gw
+
+Both patches when applied to the Firewall toolkit require the same
+configuration for IP Filter.
+
+Darren
diff --git a/contrib/ipfilter/FWTK/ftp-gw.diff b/contrib/ipfilter/FWTK/ftp-gw.diff
new file mode 100644
index 0000000..075e6eb
--- /dev/null
+++ b/contrib/ipfilter/FWTK/ftp-gw.diff
@@ -0,0 +1,237 @@
+*** ftp-gw.c.orig	Sat Nov  5 10:30:16 1994
+--- ftp-gw.c	Sun Jul  7 12:25:15 1996
+***************
+*** 11,31 ****
+   */
+  static	char	RcsId[] = "$Header: /devel/CVS/IP-Filter/FWTK/ftp-gw.diff,v 2.0.1.1 1997/01/09 15:14:46 darrenr Exp $";
+  
+  
+  #include	<stdio.h>
+  #include	<ctype.h>
+  #include	<syslog.h>
+  #include	<sys/signal.h>
+  #include	<sys/ioctl.h>
+  #include	<sys/errno.h>
+- extern	int	errno;
+- extern	char	*sys_errlist[];
+  #include	<arpa/ftp.h>
+  #include	<arpa/telnet.h>
+  #include	<sys/time.h>
+  #include	<sys/types.h>
+  #include	<sys/socket.h>
+  #include	<netinet/in.h>
+  
+  extern	char	*rindex();
+  extern	char	*index();
+--- 11,37 ----
+   */
+  static	char	RcsId[] = "$Header: /devel/CVS/IP-Filter/FWTK/ftp-gw.diff,v 2.0.1.1 1997/01/09 15:14:46 darrenr Exp $";
+  
++ /*
++  * Patches for IP Filter NAT extensions written by Darren Reed, 7/7/96
++  * darrenr@cyber.com.au
++  */
++ static	char	vIpFilter[] = "v3.1.0";
+  
+  #include	<stdio.h>
+  #include	<ctype.h>
+  #include	<syslog.h>
++ #include	<unistd.h>
++ #include	<fcntl.h>
+  #include	<sys/signal.h>
+  #include	<sys/ioctl.h>
+  #include	<sys/errno.h>
+  #include	<arpa/ftp.h>
+  #include	<arpa/telnet.h>
+  #include	<sys/time.h>
+  #include	<sys/types.h>
+  #include	<sys/socket.h>
+  #include	<netinet/in.h>
++ #include	<net/if.h>
+  
+  extern	char	*rindex();
+  extern	char	*index();
+***************
+*** 36,41 ****
+--- 42,48 ----
+  
+  #include	"firewall.h"
+  
++ #include	"ip_nat.h"
+  
+  #ifndef	BSIZ
+  #define	BSIZ	2048
+***************
+*** 83,88 ****
+--- 90,97 ----
+  static	int	cmd_noop();
+  static	int	cmd_abor();
+  static	int	cmd_passthru();
++ static	int	nat_destination();
++ static	int	connectdest();
+  static	void	saveline();
+  static	void	flushsaved();
+  static	void	trap_sigurg();
+***************
+*** 317,323 ****
+  			if(authallflg)
+  				if(say(0,"220-Proxy first requires authentication"))
+  					exit(1);
+! 			sprintf(xuf,"220 %s FTP proxy (Version %s) ready.",huf,FWTK_VERSION_MINOR);
+  			if(say(0,xuf))
+  				exit(1);
+  		}
+--- 326,335 ----
+  			if(authallflg)
+  				if(say(0,"220-Proxy first requires authentication"))
+  					exit(1);
+! 			sprintf(xuf,"220-%s FTP proxy (Version %s) ready.",huf,FWTK_VERSION_MINOR);
+! 			if(say(0,xuf))
+! 				exit(1);
+! 			sprintf(xuf,"220-%s TIS ftp-gw with IP Filter %s NAT extensions",huf,vIpFilter);
+  			if(say(0,xuf))
+  				exit(1);
+  		}
+***************
+*** 338,343 ****
+--- 350,357 ----
+  				exit(1);
+  	}
+  
++ 	nat_destination(0);
++ 
+  	/* main loop */
+  	while(1) {
+  		FD_ZERO(&rdy);
+***************
+*** 608,619 ****
+  	static char	narg[] = "501 Missing or extra username";
+  	static char	noad[] = "501 Use user@site to connect via proxy";
+  	char		buf[1024];
+- 	char 		mbuf[512];
+  	char		*p;
+  	char		*dest;
+  	char		*user;
+  	int		x;
+- 	int		msg_int;
+  	short		port = FTPPORT;
+  
+  	/* kludgy but effective. if authorizing everything call auth instead */
+--- 622,631 ----
+***************
+*** 643,648 ****
+--- 655,681 ----
+  			return(sayn(0,noad,sizeof(noad)));
+  	}
+  
++ 	if((rfd == -1) && (x = connectdest(dest,port)))
++ 		return x;
++ 	sprintf(buf,"USER %s",user);
++ 	if(say(rfd,buf))
++ 		return(1);
++ 	x = getresp(rfd,buf,sizeof(buf),1);
++ 	if(sendsaved(0,x))
++ 		return(1);
++ 	return(say(0,buf));
++ }
++ 
++ static int
++ connectdest(dest,port)
++ char *dest;
++ short port;
++ {
++ 	char		buf[1024];
++ 	char 		mbuf[512];
++ 	int		msg_int;
++ 	int		x;
++ 
+  	if(*dest == '\0')
+  		dest = "localhost";
+  
+***************
+*** 685,691 ****
+  		char	ebuf[512];
+  
+  		strcpy(ebuf,buf);
+! 		sprintf(buf,"521 %s: %s",dest,ebuf);
+  		return(say(0,buf));
+  	}
+  	sprintf(buf,"----GATEWAY CONNECTED TO %s----",dest);
+--- 718,724 ----
+  		char	ebuf[512];
+  
+  		strcpy(ebuf,buf);
+! 		sprintf(buf,"521 %s,%d: %s",dest,ntohs(port),ebuf);
+  		return(say(0,buf));
+  	}
+  	sprintf(buf,"----GATEWAY CONNECTED TO %s----",dest);
+***************
+*** 698,711 ****
+  		return(say(0,buf));
+  	}
+  	saveline(buf);
+! 
+! 	sprintf(buf,"USER %s",user);
+! 	if(say(rfd,buf))
+! 		return(1);
+! 	x = getresp(rfd,buf,sizeof(buf),1);
+! 	if(sendsaved(0,x))
+! 		return(1);
+! 	return(say(0,buf));
+  }
+  
+  
+--- 731,738 ----
+  		return(say(0,buf));
+  	}
+  	saveline(buf);
+! 	sendsaved(0,-1);
+! 	return 0;
+  }
+  
+  
+***************
+*** 1591,1593 ****
+--- 1618,1659 ----
+  	dup(nread);
+  }
+  #endif
++ 
++ 
++ static int
++ nat_destination(fd)
++ int fd;
++ {
++ 	struct	sockaddr_in	laddr, faddr;
++ 	struct	natlookup	natlookup;
++ 	char	*dest;
++ 	int	slen, natfd;
++ 
++ 	bzero((char *)&laddr, sizeof(laddr));
++ 	bzero((char *)&faddr, sizeof(faddr));
++ 	slen = sizeof(laddr);
++ 	if(getsockname(fd,(struct sockaddr *)&laddr,&slen) < 0) {
++ 		perror("getsockname");
++ 		exit(1);
++ 	}
++ 	slen = sizeof(faddr);
++ 	if(getpeername(fd,(struct sockaddr *)&faddr,&slen) < 0) {
++ 		perror("getsockname");
++ 		exit(1);
++ 	}
++ 
++ 	natlookup.nl_inport = laddr.sin_port;
++ 	natlookup.nl_outport = faddr.sin_port;
++ 	natlookup.nl_inip = laddr.sin_addr;
++ 	natlookup.nl_outip = faddr.sin_addr;
++ 	if((natfd = open("/dev/ipl", O_RDONLY)) < 0) {
++ 		perror("open");
++ 		exit(1);
++ 	}
++ 	if(ioctl(natfd, SIOCGNATL, &natlookup) == -1) {
++ 		perror("ioctl");
++ 		exit(1);
++ 	}
++ 	close(natfd);
++ 	return connectdest(inet_ntoa(natlookup.nl_inip),ntohs(natlookup.nl_inport));
++ }
diff --git a/contrib/ipfilter/FWTK/fwtkp b/contrib/ipfilter/FWTK/fwtkp
new file mode 100644
index 0000000..8f4819a
--- /dev/null
+++ b/contrib/ipfilter/FWTK/fwtkp
@@ -0,0 +1,812 @@
+diff -c -r ./ftp-gw/ftp-gw.c ../../NEW/fwtk/ftp-gw/ftp-gw.c
+*** ./ftp-gw/ftp-gw.c   Fri Sep  6 12:55:05 1996
+--- ../../NEW/fwtk/ftp-gw/ftp-gw.c      Wed Oct  9 02:51:35 1996
+***************
+*** 40,47 ****
+  
+  extern        char    *optarg;
+  
+! #include      "firewall.h"
+  
+  
+  #ifndef       BSIZ
+  #define       BSIZ    2048
+--- 40,48 ----
+  
+  extern        char    *optarg;
+  
+! char *getdsthost();
+  
++ #include      "firewall.h"
+  
+  #ifndef       BSIZ
+  #define       BSIZ    2048
+***************
+*** 84,89 ****
+--- 85,92 ----
+  static        int                     cmdcnt = 0;
+  static        int                     timeout = PROXY_TIMEOUT;
+  
++ static int do_transparent=0;
++ 
+  
+  static        int     cmd_user();
+  static        int     cmd_authorize();
+***************
+*** 98,103 ****
+--- 101,107 ----
+  static        void    saveline();
+  static        void    flushsaved();
+  static        void    trap_sigurg();
++ static int connectdest();
+  
+  #define       OP_CONN 001     /* only valid if connected */
+  #define       OP_WCON 002     /* writethrough if connected */
+***************
+*** 170,175 ****
+--- 174,180 ----
+        char            xuf[1024];
+        char            huf[128];
+        char            *passuser = (char *)0;  /* passed user as av */
++       char *psychic, *hotline;
+  
+  #ifndef       LOG_DAEMON
+        openlog("ftp-gw",LOG_PID);
+***************
+*** 314,319 ****
+--- 319,326 ----
+        } else
+                timeout = 60*60;
+  
++         psychic=getdsthost(0,NULL);
++         if(psychic) { do_transparent++; }
+  
+        /* display a welcome file or message */
+        if(passuser == (char *)0) {
+***************
+*** 322,327 ****
+--- 329,340 ----
+                                syslog(LLEV,"fwtkcfgerr: welcome-msg must have one parameter, line %d",cf->ln);
+                                exit(1);
+                        }
++                       if(do_transparent) {
++                               if(sayfile2(0,cf->argv[0],220)) {
++                                       syslog(LLEV,"fwtksyserr: cannot display welcome %s: %m",cf->argv[0]);
++                                       exit(1);
++                               }
++                       } else
+                        if(sayfile(0,cf->argv[0],220)) {
+                                syslog(LLEV,"fwtksyserr: cannot display welcome %s: %m",cf->argv[0]);
+                                exit(1);
+***************
+*** 332,338 ****
+                        if(authallflg)
+                                if(say(0,"220-Proxy first requires authentication"))
+                                        exit(1);
+!                       sprintf(xuf,"220 %s FTP proxy (Version %s) ready.",huf,FWTK_VERSION_MINOR);
+                        if(say(0,xuf))
+                                exit(1);
+                }
+--- 345,357 ----
+                        if(authallflg)
+                                if(say(0,"220-Proxy first requires authentication"))
+                                        exit(1);
+! /* foo */
+!                       if(do_transparent)
+!                       sprintf(xuf,"220-%s FTP proxy (Version %s) ready.",huf,FWTK_VERSION_MINOR);
+!                       else
+!                       sprintf(xuf,"220 %s FTP Proxy (Version %s) ready.",huf,FWTK_VERSION_MINOR);
+! /* foo */
+! 
+                        if(say(0,xuf))
+                                exit(1);
+                }
+***************
+*** 353,358 ****
+--- 372,381 ----
+                                exit(1);
+        }
+  
++       if(do_transparent) {
++               connectdest(psychic,21);
++       }
++ 
+        /* main loop */
+        while(1) {
+                FD_ZERO(&rdy);
+***************
+*** 676,681 ****
+--- 699,713 ----
+                        return(sayn(0,noad,sizeof(noad)-1));
+        }
+  
++       if(do_transparent) {
++               if((rfd==(-1)) && (x=connectdest(dest,port))) return x;
++               sprintf(buf,"USER %s",user);
++               if(say(rfd,buf)) return(1);
++               x=getresp(rfd,buf,sizeof(buf),1);
++               if(sendsaved(0,x)) return(1);
++               return(say(0,buf));
++       }
++ 
+        if(*dest == '\0')
+                dest = "localhost";
+  
+***************
+*** 701,708 ****
+                if(msg_int == 1) {
+                        sprintf(mbuf,"Permission denied for user %s to connect to %s",authuser,dest);
+                        syslog(LLEV,"deny host=%s/%s connect to %s user=%s",rladdr,riaddr,dest,authuser);
+!                       say(0,mbuf);
+!                       return(1);
+                } else {
+                        if(msg_int == -1) {
+                                sprintf(mbuf,"No match in netperm-table for %s to ftp to %s",authuser,dest);
+--- 733,740 ----
+                if(msg_int == 1) {
+                        sprintf(mbuf,"Permission denied for user %s to connect to %s",authuser,dest);
+                        syslog(LLEV,"deny host=%s/%s connect to %s user=%s",rladdr,riaddr,dest,authuser);
+!                               say(0,mbuf);
+!                               return(1);
+                } else {
+                        if(msg_int == -1) {
+                                sprintf(mbuf,"No match in netperm-table for %s to ftp to %s",authuser,dest);
+***************
+*** 717,723 ****
+                char    ebuf[512];
+  
+                strcpy(ebuf,buf);
+!               sprintf(buf,"521 %s: %s",dest,ebuf);
+                rfd = -1;
+                return(say(0,buf));
+        }
+--- 749,759 ----
+                char    ebuf[512];
+  
+                strcpy(ebuf,buf);
+!               if(do_transparent) {
+!                       sprintf(buf,"521 %s,%d: %s",dest,ntohs(port),ebuf);
+!               } else {
+!                       sprintf(buf,"521 %s: %s",dest,ebuf);
+!               }
+                rfd = -1;
+                return(say(0,buf));
+        }
+***************
+*** 732,737 ****
+--- 768,778 ----
+        }
+        saveline(buf);
+  
++       /* if(do_transparent) {
++               sendsaved(0,-1);
++               return(0);
++       } /* EEEk. I can't remember what this does. */
++ 
+        sprintf(buf,"USER %s",user);
+        if(say(rfd,buf))
+                return(1);
+***************
+*** 744,749 ****
+--- 785,860 ----
+        return 0;
+  }
+  
++ static int connectdest(dest, port)
++ char *dest;
++ short port;
++ {
++       char buf[1024], mbuf[512];
++       int msg_int, x;
++ 
++         if(*dest == '\0')
++                 dest = "localhost";
++ 
++         if(validests != (char **)0) {
++                 char    **xp;
++                 int     x;
++ 
++                 for(xp = validests; *xp != (char *)0; xp++) {
++                         if(**xp == '!' && hostmatch(*xp + 1,dest)) {
++                                 return(baddest(0,dest));
++                         } else {
++                                 if(hostmatch(*xp,dest))
++                                         break;
++                         }
++                 }
++                 if(*xp == (char *)0)
++                         return(baddest(0,dest));
++         }
++ 
++         /* Extended permissions processing goes in here for destination */
++         if(extendperm) {
++                 msg_int = auth_perm(confp, authuser, "ftp-gw", dest,(char *)0);
++                 if(msg_int == 1) {
++                         sprintf(mbuf,"Permission denied for user %s to connect to %s",authuser,dest);
++                         syslog(LLEV,"deny host=%s/%s connect to %s user=%s",rladdr,riaddr,dest,authuser);
++                                 say(0,mbuf);
++                                 return(1);
++                 } else {
++                         if(msg_int == -1) {
++                                 sprintf(mbuf,"No match in netperm-table for %s to ftp to %s",authuser,dest);
++                                 say(0,mbuf);
++                                 return(1);
++                         }
++                 }
++         }      
++ 
++         syslog(LLEV,"permit host=%s/%s connect to %s",rladdr,riaddr,dest);
++ 
++         if((rfd = conn_server(dest,port,0,buf)) < 0) {
++                 char    ebuf[512];
++ 
++                 strcpy(ebuf,buf);
++                 sprintf(buf,"521 %s: %s",dest,ebuf);
++                 rfd = -1;
++                 return(say(0,buf));
++         }
++       if(!do_transparent) {
++               sprintf(buf,"----GATEWAY CONNECTED TO %s----",dest);
++               saveline(buf);
++       }
++ 
++         /* we are now connected and need to try the autologin thing */
++         x = getresp(rfd,buf,sizeof(buf),1);
++         if(x / 100 != COMPLETE) {
++                 sendsaved(0,-1);
++                 return(say(0,buf));
++         }
++         saveline(buf);
++ 
++       sendsaved(0,-1);
++       return 0;
++ }
++ 
+  
+  
+  static        int
+***************
+*** 1053,1058 ****
+--- 1164,1171 ----
+        static char             nprn[] = "500 cannot get peername";
+        char                    buf[512];
+  
++       /* syslog(LLEV,"DEBUG: port cmd"); */
++ 
+        if(ac < 2)
+                return(sayn(0,narg,sizeof(narg)-1));
+  
+***************
+*** 1119,1124 ****
+--- 1232,1238 ----
+  #define UC(c)   (((int)c) & 0xff)
+        sprintf(buf,"PORT %d,%d,%d,%d,%d,%d\r\n",UC(k[0]),UC(k[1]),UC(k[2]),
+                UC(k[3]),UC(l[0]),UC(l[1]));
++       /* syslog(LLEV,"DEBUG: %s",buf); */
+        s = strlen(buf);
+        if (write(rfd, buf, s) != s)
+                return 1;
+***************
+*** 1330,1335 ****
+--- 1444,1450 ----
+  callback()
+  {
+        /* if we haven't gotten a valid PORT scrub the connection */
++       /* syslog(LLEV,"DEBUG: callback()."); */
+        if((outgoing = accept(boundport,(struct sockaddr *)0,(int *)0)) < 0 || clntport.sin_port == 0)
+                goto bomb;
+        if(pasvport != -1) { /* incoming handled by PASVcallback */
+***************
+*** 1796,1801 ****
+--- 1911,1960 ----
+        }
+        return(0);
+  }
++ 
++ /* ok, so i'm in a hurry. english paper due RSN. */
++ sayfile2(fd,fn,code)
++ int     fd;
++ char    *fn;
++ int     code;
++ {
++         FILE    *f;
++         char    buf[BUFSIZ];
++         char    yuf[BUFSIZ];
++         char    *c;
++         int     x;
++         int     saidsomething = 0;
++ 
++         if((f = fopen(fn,"r")) == (FILE *)0)
++                 return(1);
++         while(fgets(buf,sizeof(buf),f) != (char *)0) {
++                 if((c = index(buf,'\n')) != (char *)0)
++                         *c = '\0';
++                 x = fgetc(f);
++                 if(feof(f))
++                         sprintf(yuf,"%3.3d-%s",code,buf);
++                 else {
++                         sprintf(yuf,"%3.3d-%s",code,buf);
++                         ungetc(x,f);
++                 }
++                 if(say(fd,yuf)) {
++                         fclose(f);
++                         return(1);
++                 }
++                 saidsomething++;
++         }
++         fclose(f);
++         if (!saidsomething) {
++                 syslog(LLEV,"fwtkcfgerr: sayfile for %d is empty",code);
++                 sprintf(yuf, "%3.3d The file to display is empty",code);
++                 if(say(fd,yuf)) {
++                         fclose(f);
++                         return(1);
++                 }
++         }
++         return(0);
++ }
++ 
+  
+  
+  porttoaddr(s,a)
+diff -c -r ./http-gw/http-gw.c ../../NEW/fwtk/http-gw/http-gw.c
+*** ./http-gw/http-gw.c Mon Sep  9 14:40:53 1996
+--- ../../NEW/fwtk/http-gw/http-gw.c    Wed Oct  9 02:51:57 1996
+***************
+*** 27,32 ****
+--- 27,37 ----
+  static char http_buffer[8192];
+  static char reason[8192];
+  static        int     checkBrowserType = 1;
++ /* foo */
++ static int do_transparent=0;
++ /* foo */
++ 
++ char *getdsthost();
+  
+  static void do_logging()
+  {     char *proto = "GOPHER";
+***************
+*** 422,427 ****
+--- 427,443 ----
+        /*(NOT A SPECIAL FORM)*/
+  
+                if((rem_type & TYPE_LOCAL)== 0){
++               /* foo */
++                       char *psychic=getdsthost(sockfd,&def_port);
++                       if(psychic) {
++                               if(strlen(psychic)<=MAXHOSTNAMELEN) {
++                                       do_transparent++;
++                                       strncpy(def_httpd,psychic,strlen(psychic));
++                                       strncpy(def_server,psychic,strlen(psychic));
++                               }
++                       }
++ 
++               /* foo */
+  /*  See if it can be forwarded */
+  
+                        if( can_forward(buf)){
+***************
+*** 1513,1519 ****
+                                                    parse_vec[0], 
+                                                    parse_vec[1],
+                                                    ourname, ourport);
+!                                   }else{
+                                            sprintf(new_reply,"%s\tgopher://%s:%s/%c%s\t%s\t%u",
+                                                    parse_vec[0], parse_vec[2],
+                                                    parse_vec[3], chk_type_ch,
+--- 1529,1541 ----
+                                                    parse_vec[0], 
+                                                    parse_vec[1],
+                                                    ourname, ourport);
+!                                   }
+! /* FOO */
+! else if(do_transparent) {
+!  sprintf(new_reply,"%s\t%s\t%s\t%s",parse_vec[0],parse_vec[1],parse_vec[2],parse_vec[3]);
+! }
+! /* FOO */
+!                                       else{
+                                            sprintf(new_reply,"%s\tgopher://%s:%s/%c%s\t%s\t%u",
+                                                    parse_vec[0], parse_vec[2],
+                                                    parse_vec[3], chk_type_ch,
+diff -c -r ./lib/hnam.c ../../NEW/fwtk/lib/hnam.c
+*** ./lib/hnam.c        Fri Nov  4 18:30:19 1994
+--- ../../NEW/fwtk/lib/hnam.c   Wed Oct  9 02:34:13 1996
+***************
+*** 22,27 ****
+--- 22,31 ----
+  
+  
+  #include      "firewall.h"
++ #ifdef __FreeBSD__
++ #include      <net/if.h>
++ #include      "ip_nat.h"
++ #endif /* __FreeBSD__ */
+  
+  
+  char  *
+***************
+*** 44,47 ****
+--- 48,115 ----
+  
+        bcopy(hp->h_addr,&sin.sin_addr,hp->h_length);
+        return(inet_ntoa(sin.sin_addr));
++ }
++ 
++ char *getdsthost(fd, ptr)
++ int fd;
++ int *ptr;
++ {
++  struct sockaddr_in sin;
++  struct hostent *hp;
++  int sl=sizeof(struct sockaddr_in), err=0, local_h=0, i=0;
++  char buf[255], hostbuf[255];
++ #ifdef __FreeBSD__
++  struct sockaddr_in rsin;
++  struct natlookup natlookup;
++ #endif
++ 
++ #ifdef linux
++ /* This should also work for UDP. Unfortunately, it doesn't.
++    Maybe when the Linux UDP proxy code gets a little cleaner.
++ */
++  if(!(err=getsockname(0,&sin,&sl))) {
++   if(ptr) *ptr=ntohs(sin.sin_port);
++   sprintf(buf,"%s",inet_ntoa(sin.sin_addr));
++   gethostname(hostbuf,254);
++   hp=gethostbyname(hostbuf);
++   while(hp->h_addr_list[i]) {
++    bzero(&sin,&sl);
++    memcpy(&sin.sin_addr,hp->h_addr_list[i++],sizeof(hp->h_addr_list[i++]));
++    if(!strcmp(buf,inet_ntoa(sin.sin_addr))) local_h++;
++   }
++   if(local_h) { /* syslog(LLEV,"DEBUG: hnam.c: non-transparent."); */ return(NULL); }
++   else { return(buf); }
++  }
++ #endif
++ 
++ #ifdef __FreeBSD__
++ /* The basis for this block of code is Darren Reed's
++    patches to the TIS ftwk's ftp-gw.
++ */
++  bzero((char*)&sin,sizeof(sin));
++  bzero((char*)&rsin,sizeof(rsin));
++  if(getsockname(fd,(struct sockaddr*)&sin,&sl)<0) {
++   return NULL;
++  }
++  sl=sizeof(rsin);
++  if(getpeername(fd,(struct sockaddr*)&rsin,&sl)<0) {
++   return NULL;
++  }
++  natlookup.nl_inport=sin.sin_port;
++  natlookup.nl_outport=rsin.sin_port;
++  natlookup.nl_inip=sin.sin_addr;
++  natlookup.nl_outip=rsin.sin_addr;
++  if((natfd=open("/dev/ipl",O_RDONLY))<0) {
++   return(NULL);
++  }
++  if(ioctl(natfd,SIOCGNATL,&natlookup)==(-1)) {
++   return(NULL);
++  }
++  close(natfd);
++  if(ptr) *ptr=ntohs(natlookup.nl_inport);
++  sprintf(buf,"%s",inet_ntoa(natlookup.nl_inip));
++ #endif
++ 
++  /* No transparent proxy support */
++  return(NULL);
+  }
+Only in ./lib: hnam.c.orig
+diff -c -r ./plug-gw/plug-gw.c ../../NEW/fwtk/plug-gw/plug-gw.c
+*** ./plug-gw/plug-gw.c Thu Sep  5 15:36:33 1996
+--- ../../NEW/fwtk/plug-gw/plug-gw.c    Wed Oct  9 02:46:48 1996
+***************
+*** 39,44 ****
+--- 39,48 ----
+  static        char            **validdests = (char **)0;
+  static        Cfg             *confp;
+  
++ int do_transparent=0;
++ 
++ char *getdsthost();
++ 
+  main(ac,av)
+  int   ac;
+  char  *av[];
+***************
+*** 193,201 ****
+--- 197,213 ----
+        char            *ptr;
+        int             state = 0;
+        int             ssl_plug = 0;
++       int             pport=0;
+  
+        struct timeval  timo;
+  
++       /* Transparent plug-gw is probably a bad idea, but hey .. */
++       dhost=getdsthost(0,&pport);
++       if(dhost) {
++               do_transparent++;
++               portid=pport;
++       }
++ 
+        if(c->flags & PERM_DENY) {
+                if (p == -1)
+                        syslog(LLEV,"deny host=%s/%s port=any",rhost,raddr);
+***************
+*** 215,221 ****
+                                syslog(LLEV,"fwtkcfgerr: -plug-to takes an argument, line %d",c->ln);
+                                exit (1);
+                        }
+!                       dhost = av[x];
+                        continue;
+                }
+  
+--- 227,234 ----
+                                syslog(LLEV,"fwtkcfgerr: -plug-to takes an argument, line %d",c->ln);
+                                exit (1);
+                        }
+!                       if(!dhost) dhost = av[x];
+!                       /* syslog(LLEV,"DEBUG: dhost now is [%s]",dhost); */
+                        continue;
+                }
+  
+diff -c -r ./rlogin-gw/rlogin-gw.c ../../NEW/fwtk/rlogin-gw/rlogin-gw.c
+*** ./rlogin-gw/rlogin-gw.c     Fri Sep  6 12:56:33 1996
+--- ../../NEW/fwtk/rlogin-gw/rlogin-gw.c        Wed Oct  9 02:49:04 1996
+***************
+*** 39,45 ****
+--- 39,47 ----
+  
+  
+  extern        char    *maphostname();
++ char *getdsthost();
+  
++ int do_transparent=0;
+  
+  static        int     cmd_quit();
+  static        int     cmd_help();
+***************
+*** 120,125 ****
+--- 122,130 ----
+        static char     *tokav[56];
+        int             tokac;
+        struct timeval  timo;
++       /* foo */
++       char *psychic;
++       /* foo */
+  
+  #ifndef       LOG_NDELAY
+        openlog("rlogin-gw",LOG_PID);
+***************
+*** 185,191 ****
+                xforwarder = cf->argv[0];
+        }
+  
+! 
+  
+        if((cf = cfg_get("directory",confp)) != (Cfg *)0) {
+                if(cf->argc != 1) {
+--- 190,203 ----
+                xforwarder = cf->argv[0];
+        }
+  
+!       /* foo */
+!       psychic=getdsthost(0,NULL);
+!       if(psychic) {
+!               do_transparent++;
+!               strncpy(dest,psychic,511);
+!               dest[511]='\0';
+!       }
+!       /* foo */
+  
+        if((cf = cfg_get("directory",confp)) != (Cfg *)0) {
+                if(cf->argc != 1) {
+***************
+*** 260,269 ****
+        }
+  
+        /* if present a host name, chop and save username and hostname */
+!       dest[0] = '\0';
+        if((p = index(rusername,'@')) != (char *)0) {
+                char    *namp;
+  
+                *p++ = '\0';
+                if(*p == '\0')
+                        p = "localhost";
+--- 272,282 ----
+        }
+  
+        /* if present a host name, chop and save username and hostname */
+!       /* dest[0] = '\0'; */
+        if((p = index(rusername,'@')) != (char *)0) {
+                char    *namp;
+  
++               dest[0] = '\0';
+                *p++ = '\0';
+                if(*p == '\0')
+                        p = "localhost";
+***************
+*** 293,300 ****
+--- 306,326 ----
+                        goto leave;
+        }
+  
++       /* syslog(LLEV,"DEBUG: Uh-oh, $dest = %s\n",dest); */
++ 
+        if(dest[0] != '\0') {
+  /* Setup connection directly to remote machine */
++               if((cf = cfg_get("welcome-msg",confp)) != (Cfg *)0) {
++                       if(cf->argc != 1) {
++                               syslog(LLEV,"fwtkcfgerr: welcome-msg must have one parameter, line %d",cf->ln);
++                               exit(1);
++                       }
++                       if(sayfile(0,cf->argv[0])) {
++                               syslog(LLEV,"fwtksyserr: cannot display welcome %s: %m",cf->argv[0]);
++                               exit(1);
++                       }
++               }
++ /* Does this cmd_connect thing feel like a kludge or what? */
+                sprintf(buf,"connect %.1000s",dest);
+                tokac = enargv(buf, tokav, 56, tokbuf, sizeof(tokbuf));
+                if (cmd_connect(tokac, tokav, buf) != 2)
+***************
+*** 526,539 ****
+                char    ebuf[512];
+  
+                syslog(LLEV,"permit host=%s/%s connect to %s",rhost,raddr,namp);
+                if(strlen(namp) > 20)
+                        namp[20] = '\0';
+                if(rusername[0] != '\0')
+                        sprintf(ebuf,"Trying %s@%s...",rusername,namp);
+                else
+                        sprintf(ebuf,"Trying %s...",namp);
+!               if(say(0,ebuf))
+!                       return(1);
+        } else
+                syslog(LLEV,"permit host=%s/%s connect to %s",rhost,raddr,av[1]);
+        if((serfd = conn_server(av[1],RLOGINPORT,1,buf)) < 0) {
+--- 552,567 ----
+                char    ebuf[512];
+  
+                syslog(LLEV,"permit host=%s/%s connect to %s",rhost,raddr,namp);
++               if(!do_transparent) {
+                if(strlen(namp) > 20)
+                        namp[20] = '\0';
+                if(rusername[0] != '\0')
+                        sprintf(ebuf,"Trying %s@%s...",rusername,namp);
+                else
+                        sprintf(ebuf,"Trying %s...",namp);
+!                       if(say(0,ebuf))
+!                               return(1);
+!               }
+        } else
+                syslog(LLEV,"permit host=%s/%s connect to %s",rhost,raddr,av[1]);
+        if((serfd = conn_server(av[1],RLOGINPORT,1,buf)) < 0) {
+diff -c -r ./tn-gw/tn-gw.c ../../NEW/fwtk/tn-gw/tn-gw.c
+*** ./tn-gw/tn-gw.c     Fri Sep  6 12:55:48 1996
+--- ../../NEW/fwtk/tn-gw/tn-gw.c        Wed Oct  9 02:50:17 1996
+***************
+*** 87,92 ****
+--- 87,94 ----
+  static        int                     cmd_xforward();
+  static        int                     cmd_timeout();
+  
++ char *getdsthost();
++ 
+  static        int                     tn3270 = 1;     /* don't do tn3270 stuff */
+  static        int                     doX;
+  
+***************
+*** 97,102 ****
+--- 99,106 ----
+  static        int                     timeout = PROXY_TIMEOUT;
+  static        char                    timed_out_msg[] = "\r\nConnection closed due to inactivity";
+  
++ int do_transparent=0;
++ 
+  typedef       struct  {
+        char    *name;
+        char    *hmsg;
+***************
+*** 140,145 ****
+--- 144,151 ----
+        char            tokbuf[BSIZ];
+        char            *tokav[56];
+        int             tokac;
++       int port;
++       char *psychic;
+  
+  #ifndef       LOG_DAEMON
+        openlog("tn-gw",LOG_PID);
+***************
+*** 308,313 ****
+--- 314,346 ----
+                }
+        }
+  
++       psychic=getdsthost(0,&port);
++       if(psychic) {
++               if((strlen(psychic) + 10) < 510) {
++                       do_transparent++;
++                       if(port)
++                               sprintf(dest,"%s:%d",psychic,port);
++                       else
++                               sprintf(dest,"%s",psychic);
++ 
++ 
++               if(!welcomedone)
++                       if((cf = cfg_get("welcome-msg",confp)) != (Cfg *)0) {
++                                if(cf->argc != 1) {
++                                        syslog(LLEV,"fwtkcfgerr: welcome-msg must have one parameter, line %d",cf->ln);
++                                        exit(1);
++                                }
++                                if(sayfile(0,cf->argv[0])) {
++                                        syslog(LLEV,"fwtksyserr: cannot display welcome %s:%m",cf->argv[0]);
++                                        exit(1);
++                                }
++                                welcomedone = 1;
++                               }
++ 
++ 
++               }
++       }
++ 
+        while (argc > 1) {
+                argc--;
+                argv++;
+***************
+*** 864,877 ****
+                }
+        }
+  
+- 
+        if((namp = maphostname(av[1])) != (char *)0) {
+                char    ebuf[512];
+  
+                syslog(LLEV,"permit host=%s/%s destination=%s",rladdr,riaddr,namp);
+!               sprintf(ebuf,"Trying %s port %d...",namp,port);
+!               if(say(0,ebuf))
+!                       return(1);
+        } else
+                syslog(LLEV,"permit host=%s/%s destination=%s",rladdr,riaddr,av[1]);
+  
+--- 897,911 ----
+                }
+        }
+  
+        if((namp = maphostname(av[1])) != (char *)0) {
+                char    ebuf[512];
+  
+                syslog(LLEV,"permit host=%s/%s destination=%s",rladdr,riaddr,namp);
+!               if(!do_transparent) {
+!                       sprintf(ebuf,"Trying %s port %d...",namp,port);
+!                       if(say(0,ebuf))
+!                               return(1);
+!               }
+        } else
+                syslog(LLEV,"permit host=%s/%s destination=%s",rladdr,riaddr,av[1]);
+  
+***************
+*** 903,910 ****
+  
+        syslog(LLEV,"connected host=%s/%s destination=%s",rladdr,riaddr,av[1]);
+        strncpy(dest,av[1], 511);
+!       sprintf(buf, "Connected to %s.", dest);
+!       say(0, buf);
+        return(2);
+  }
+  
+--- 937,946 ----
+  
+        syslog(LLEV,"connected host=%s/%s destination=%s",rladdr,riaddr,av[1]);
+        strncpy(dest,av[1], 511);
+!       if(!do_transparent) {
+!               sprintf(buf, "Connected to %s.", dest);
+!               say(0, buf);
+!       }
+        return(2);
+  }
+  
+
+
diff --git a/contrib/ipfilter/HISTORY b/contrib/ipfilter/HISTORY
new file mode 100644
index 0000000..7cd9106
--- /dev/null
+++ b/contrib/ipfilter/HISTORY
@@ -0,0 +1,567 @@
+#
+# NOTE: Quite a few patches and suggestions come from other sources, to whom
+#       I'm greatly indebted, even if no names are mentioned.
+#
+# Thanks to Craig Bishop of connect.com.au and Sun Microsystems for the
+# loan of a machine to work on a Solaris 2.x port of this software.
+#
+3.1.7		8/2/97 - Released
+
+Macros used for ntohs/htons supplied with gcc don't always work very well
+when the assignment is the same variable being converted.
+
+Filter matching doesn't not match rule which checks tcp flags on packets
+which are fragments - David Wilson
+
+3.1.7beta	30/1/97 - Released
+
+Fix up NAT bugs introduced in last major change (now tested), including
+nat_delete(), nat_lookupredir(), checksum changes, etc.
+
+3.1.7alpha	30/1/97 - Released
+
+Many changes to NAT code, including contributions from Laurent Joncheray
+<lpj@ans.net>
+
+Use "NO_SLEEP" when allocating memory under SunOS.
+
+Make kernel printf's nicer for BSD/SunOS4
+
+Always do a checksum for packets being filtered going out and being
+processed by fastroute.
+
+Leave kernel to play with cdevsw on *BSD systems with LKM's.
+
+ipnat.1 man page fixes.
+
+3.1.6		21/1/97 - Released
+
+Allow NAT to work on BSD systems in conjunction with "pass .. to ifname"
+
+Memory leak introduced in 3.1.3 in NAT lists, clearing of NAT table tried
+to free memory twice.
+
+NAT recalculates IP header checksum based on difference between IP#'s and
+port numbers - should be just IP#'s (Solaris2 only)
+
+3.1.5		13/1/97 - Released
+
+fixed setting of NAT timeouts and use different timeouts for concurrent
+TCP sessions using the same IP# mapping (when port mapping isn't used)
+
+multiple loading/unloading of LKM's doesn't clean up cdevsw properly for
+*BSD systems.
+
+3.1.4		10/1/97	- Released
+
+add command line options -C and -F to ipnat to flush NAT list and table
+
+ipnat -l loops on output - Neil Readwin (nreadwin@nysales.micrognosis.com)
+
+NetBSD/FreeBSD kernel malloc changes - Daniel Carosone
+
+3.1.3		10/1/97 - Released
+
+NAT chains not constructed correctly in hash tables - Antony Y.R Lu
+(antony@hawk.ee.ncku.edu.tw)
+
+Updated INSTALL.NetBSD, INSTALL.FreeBSD and INSTALL.Sol2
+
+man page update (ipf.5) from Daniel Carosone (dan@geek.com.au)
+
+ICMP header checksum update now included in NAT.
+
+Solaris2 needs to modify IP header checksums in ip_natin and ip_natout.
+
+3.1.2		4/12/96 - Released
+
+ipmon doesn't use syslog all the time when given -s option
+
+fixed mclput panic in ip_input.c and replace ntohs() with NTOHS() macro
+
+check the results of hostname resolution in ipnat
+
+"make *install" fixed for subdirectories.
+
+problems with "ARCH:=" and gnu make resolved
+
+parser reports an error for lines with whitespaces only rather than skipping
+them. D.Carosone@abm.com.au (Daniel Carosone)
+
+patches for integration into NetBSD-current (post 1.2).
+
+add an option to allow non-IP packets going up/down the stream on Solaris2
+to be dropped. John Bass.
+
+3.1.2beta	21/11/96 - Released
+
+make ipsend compile on Linux 2.0.24
+
+changes to TCP kept state algorithm, making it watch state on TCP
+connections in both directions.  Also use the same algorithm for NAT TCP.
+
+-Wall cleanup - Bernd Ernesti
+
+added "or-block" for "pass .. log or-block" after a suggestion from
+David Oppenheim (davido@optimation.com.au)
+
+added subdirectories for building IP Filter in SunOS5/BSD for different
+cpu architecures
+
+Solaris2 fixes to logging and pre-filtering packet processing - 3.1.1p2
+
+mbuf logging not using mtod(), remove iplbusy - 3.1.1p1		1/11/96
+
+3.1.1		28/10/96 - Released
+
+Installation script fixes and deinstall scripts for IP Filter on:
+SunOS4/FreeBSD/NetBSD
+
+Man page fixes - Paul Dubois (dubois@primate.wisc.edu)
+
+Fix use of SOLARIS macro in ipmon, rewrote ipllog() (again!)
+
+parsing isn't completely case insensitive - David Wilson
+(davidw@optimation.com.au)
+
+Release ipl_mutex across uiomove() calls
+
+print entire rule entries out for "ipf -z" when zero'ing per-rule stats.
+
+ipfstat returns same output for "hits" in "ipfstat -aio" - Terletsky Slavik
+(ts@polynet.lviv.ua)
+
+New algorithm for setting timeouts for TCP connection (more closely follow
+TCP FSM) - Pradeep Krishnan (pkrishna@netcom.com)
+
+Track both window sizes for TCP connections through "keep state".
+
+Solaris2 doesn't like _KERNEL defined in stdargs.h - Jos van Wezel
+(wezel@bio.vu.nl)
+
+3.1.1-beta2	6/10/96 - Released
+
+Solaris2 fastroute/dup-to/to now works
+
+ipmon `record' reading rewritten
+
+Added post-NetBSD1.2 packet filter patches - Mathew Green (mrg@eterna.com.au)
+
+Attempt to use in_proto.c.diff, not "..diffs" for SunOS4 - David Wilson
+(davidw@optimation.com.au)
+
+Michael Ryan (mike@NetworX.ie) reports the following:
+* The Trumpet WinSock under Windows always sends its SYN packet with an ACK
+  value of 1, unlike any other implementation I've seen, which would set it
+  to zero.  The "keep state" feature of IP Filter doesn't work when receiving
+  non-zero ACK values on new connection requests.
+* */Makefile install rule doesn't install all the binaries/man pages
+* Make ipnat use "tcp/udp" instead of "tcpudp"
+* Print out "tcp/udp" properly
+* ipnat "portmap tcp" matches "portmap udp" when adding/removing
+* NAT dest. ip# increased by one on mask of 0xffffffff when it shouldn't
+
+3.1.1-beta	1/9/96 - Released
+
+add better detection of TCP connections closing to TCP state monitoring.
+
+fr_addstate() not called correctly for fragments.  "keep state" and
+"keep frag" code don't work together 100% - Songqing Cai
+(songqing_cai@sterling.com)
+
+call to fr_addstate() incorrect for adding state in combination with keeping
+fragment information - Songqing Cai (songqing_cai@sterling.com)
+
+KFREE() passed fp (incorrect) and not fr (correct) in ip_frag.c - John Hood
+(cgull@smoke.marlboro.vt.us)
+
+make ipf parser recognise '\\' as a `continued line' marker - Dima Ruban
+(dima@best.net)
+
+3.1.1-alpha	23/8/96 - Released
+
+kernel panic's when ICMP packets go through NAT code
+
+stats aren't zero'd properly with ipf -Z
+
+ipnat doesn't show port numbers correctly all the time and also add the
+protocol (tcp/udp/tcpudp) to rdr output - Carson Gaspar (carson@lehman.com)
+
+fast checksum fixing not 100% - backout patch - Bill Dorsey (dorsey@lila.com)
+
+NetBSD-1.2 patches from - VaX#n8 <vax@linkdead.paranoia.com>
+
+Usage() call error in fils.c - Ajay Shekhawat (ajay@cedar.buffalo.edu)
+
+ip_optcopy() staticly defined in ip_output.c in SunOS4 - Nick Hall
+(nrh@tardis.ed.ac.uk)
+
+3.1.0		7/7/96 - Released
+
+Reformatted ipnat output to be compatible with it's input, so that
+"ipnat -l | ipnat -rf -" is possible.
+
+3.1.0beta	30/6/96 - Released
+
+NetBSD-1.2 patches from Greg Woods (woods@most.weird.com)
+
+kernel module must not be installed stripped (Solaris2), as created by
+"make package" for Solaris2 - Peter Heimann
+(peter@i3.informatik.rwth-aachen.de)
+
+3.1.0alpha	5/6/96 - Released
+
+include examples in package for solaris2
+
+patches for removing an extra ip header checksum (FreeBSD/NetBSD/SunOS)
+
+removed trailing space from printouts of rules in ipf.
+
+ipresend supports the same range of inputs that ipftest does.
+
+sending a duplicate copy of a packet to another network devices is now
+supported. ("dup-to")
+
+sending a packet to an arbitary interface is now supported, irrespective
+of its actual route, with no ttl decrement.  Can also be routed without
+the ttl being decremented. ("to" and "fastroute").
+
+"call" option added to support calling a generic function if a packet is
+matched.
+
+show all (upto 4) recorded bytes from the interface name in logging from
+ipmon.
+
+support for using unix file permissions for read/write access on the device
+is now in place.
+
+recursive mutex in nat_new() for Solaris 2.x - Per L. Hagen <per@stibo.dk>
+
+ipftest doesn't call initparse() for THISHOST - Catherine Allen
+(cla@connect.com.au)
+
+Man page corrections from Rex Bona (rex@pengo.comsmiths.com.au)
+
+3.0.4		10/4/96 - Released
+
+looop in `parsing' IP packets with optlen 0 for ip options.
+
+rule number not initialized and resulted in unexpected results for state
+maching.
+
+option parsing and printing bugs - Pradeep Krishnan
+
+3.0.4beta	25/3/96	- Released
+
+wouldn't parse "keep flags keep state" correctly.
+
+SunOS4.1.x ip_input.c doesn't recognise all 1s broadcast address - Nigel Verdon
+
+patches for BSDI's BSD/OS 2.1 and libpcap reader on little endian systems
+from Thorsten Lockert <tholo@tetherless.com>
+
+b* functions in fil.c on Solaris 2.4
+
+3.0.3	17/3/96 - Released
+
+added patches to support IP Filter initialisation when compiled into the
+kernel.
+
+added -x option to ipmon to display hex dumps of logged packets.
+
+added -H option to ipftest to allow ascii-hex formatted input to specify
+arbitary IP packets.
+
+Sending TCP RSTs as a response now work for Solaris2 x86
+
+add patches to make IP Filter compile into NetBSD kernels properly.
+
+patch to stop SunOS 4.1.x kernels panicing with "data traps".
+
+ipfboot script unloads and reloads ipf module on Solaris2 if it is already
+loaded into the kernel.
+
+Installation of IP Filter as a Solaris2 package is now supported.
+
+Man pages for ipnat.4, ipnat.5 added.
+
+added some more regression tests and fixed up IP Filter to pass the new tests
+(previous versions failed some of the tests in set 12).
+
+IP option filter processing has changed so that saying "with opt lsrr" will
+check only for that one, but not mask out other options, so a packet with
+strict source routing, along with loose source routing will match all of
+"with opt lsrr", "with opt ssrr" and "with opt lsrr,ssrr".
+
+IPL_NAME needed in ipnat.c - Kelly (kelly@count04.mry.scruznet.com)
+
+patches for clean NetBSD compilation from Bernd Ernesti (bernd@arresum.inka.de)
+
+make install is incorrect - Julian Briggs (julian@lightwork.co.uk)
+
+strtol() returns 0x7fffffff for all negative numbers,
+printfr() generates incorrect output for "opt sec-class *",
+handling of "not opt xxx opt yyy" incorrect.
+- Minh Tonthat (minht@sbei.com)/Pradeep Krishnan (pradeepk@sbei.com)
+
+m_pullup() called only for input and not output; caused problems
+with filtering icmp - Nigel Verdon (verdenn@gb.swissbank.com)
+
+parsing problem for "port 1" and NetBSD patches incorrect -
+Andreas Gustafsson (gson@guava.araneus.fi)
+
+3.0.2	4/2/96 - Released
+
+Corrected bug where NAT recalculates checksums for fragments.
+
+make NAT recalculate UDP checksums (rather than setting them to 0),
+if they're non-zero.
+
+DNS patches - Real Page (Real.Page@Matrox.com)
+
+alteration of checksum recalculations in NAT code and addition of
+redirection with NAT - Mike Neuman
+
+core dump, if tcp/udp is used with a port number and not service name,
+in ipf - Mike Neuman (mcn@engarde.com)
+
+initparse() call, missing to prime "<thishost>" hook - Craig Bishop
+
+3.0.1	14/1/96 - Released
+
+miscellaneous patches for Solaris2
+
+3.0	14/1/96	- Released
+
+Patch included for FDDI, from Richard Ohnemus
+(Richard_Ohnemus@dallas.csd.sterling.com)
+
+Code cleanup for release.
+
+3.0beta4 10/1/96
+
+recursive mutex in ipfr_slowtimer fixed, reported by Craig Bishop
+
+recursive mutex in sending TCP RSTs fixed, reported by Tony Becker
+
+3.0beta3 9/1/96
+
+FIxup for Solaris2.5 install and interface name bug in ipftest from
+Julian Briggs (julian@lightwork.co.uk)
+
+Byte order patches for ipmon from Tony Becker (tony@mcrsys.com)
+
+3.0beta2 7/1/96
+
+Added the (somewhat warped) IP accounting as it exists in ipfw on FreeBSD.
+Note, this isn't really what one would call IP account, when compared to
+process accounting, sigh.
+
+Split up ipresend into iptest/ipresend/ipsend
+
+Added another m_pullup() inside fr_check() for BSD style kernels and
+added some checks to ipllog() to not log more than is present (for short
+packets).
+
+Fixed bug where failed hostname/netname resolution goes undetecte and
+becomes 0.0.0.0 (any) (reported Guido van Rooij)
+
+3.0beta	11/11/95	- Released
+
+Rewrote the way rule testing is done, reducing the number of files needed and
+generated.
+
+SIOCIPFFL was incorrectly affected by IPFILTER_LOG (Mathew Green)
+
+Patches from Guido van Rooij to fix sending back TCP RSTs on Net-2/Net-3
+BSD based Unixes (panic'd)
+
+Patches for FreeBSD/i86 ipmon from Riku Kalinen <riku@tequila.nixu.fi>
+(I think someone else already told me about these but they got lost :-/)
+
+Changed Makefile structure to build object files for different operating
+systems in separate directories by default.
+
+BSDI has ef0 for first ethernet interface
+
+Allow for a "not" operator before optional keywords.
+
+The "rule number" was being incorrectly incremented every time it went through
+the loop rather than when it matched a rule.
+
+2.8.2	24/10/95	- Released
+
+Fixed up problems with "textip" for doing lots of testing.
+
+Fixed bug in detection of "short" tcp/ip packets (all reported as being short).
+
+Solaris 2.4 port now works 100%.
+
+Man page errors reported and fixed.
+
+Removed duplicate entry in etc/services for login on port 49 (Craig Bishop).
+
+Fixed ipmon output to put a space after the log-letter.
+
+Patch from Guido van Rooij to fix parsing problem.
+
+2.8.1	15/10/95	- Released
+
+Added ttl and tos filtering.
+
+Patches for fixing up compilation and port problems (little endian)
+from Guido van Rooij <guido@IAEhv.nl>.
+
+Man page problems reported and fixed by Carson Gaspar <carson@lehman.com>.
+
+ipsend doesn't compile properly on Solaris2.4
+
+Lots of work done for Solaris2.4 to make it MT/MP safe and work.
+
+2.8	15/9/95		- Released
+
+ipmon can now send messages to syslogd (-s) and use names instead of
+numbers (-N).
+
+IP packets are now "compiled" into a structure only containing filterable
+bits.
+
+Added regression testing in the test/ subdirectory, using a new option
+(-b) with the ipftest program.
+
+Added "nomatch" return to filter results.  These are counted and show
+up in reports from ipfstat.
+
+Moved filter code out of ip_fil.c and into fil.c - there is now only one
+instance of it in the package.
+
+Added Solaris 2.4 support.
+
+Added IPSO basic security option filtering.
+
+Added name support for filtering on all 19 named IP options.
+
+Patches from Ivan Brawley to log packet contents as well as packet headers.
+
+Update for sun/conf.c.diff from Ivan Brawley <ibrawley@awadi.com.AU>
+
+Added patches for FreeBSD 1, and added two new switches (-E, -D) to ipf,
+along with a new ioctl, SIOCFRENB.
+From: Dieter Dworkin Muller <dworkin@village.org>
+
+2.7.3	31/7.95		- Released
+
+Didn't compile cleanly without IPFILTER_LOG defined (Mathew Green).
+
+ipftest now deals with tcpdump3 binary output files (from libpcap) with -P.
+
+Brought ipftest program upto date with actual filter code.
+
+Filter would cause a match to occur when it wasn't meant to if the packet
+had short headers and was missing portions that should have been there.
+Err, it would rightly not match on them, but their absence caused a match
+when it shouldn't have been.
+
+2.7.2	26/7/95		- Released
+
+Problem with filtering just SYN flagged packets reported by
+Dieter Dworkin Muller <dworkin@village.org>.  To solve this
+problem, added support for masking TCP flags for comparison "flags X/Y".
+
+2.7.1	9/7/95		- Released
+
+Added ip_dirbroadcast support for Sun ip_input.c
+
+Fixed up the install scripts for FreeBSD/NetBSD to recognise where they are
+better.
+
+2.7	7/7/95		- Released
+
+Added "return-rst" to return TCP RST's to TCP packets.
+
+Actually ported it to FreeBSD-i386 2.0.0, so it works there properly now.
+
+Added insertion of filter rules.  Use "@<#>" at the beginning of a filter
+to insert a rule at row #.
+
+Filter keeps track of how many times each rule is matched.
+
+Changed compile time things to match kernel option (IPFILTER_LKM &
+IPFILTER_LOG).
+
+Updated ip_input.c and ip_output.c with paches for 3.5 Multicast IP.
+(No change required for 3.6)
+
+Now includes TCP fragments which start inside the TCP header as being short.
+Added counting the number of times each rule is matched.
+
+
+2.6	11/5/95		- Released
+
+Added -n option to ipf: when supplied, no changes are made to the kernel.
+
+Added installation scripts for SunOS 4.1.x and NetBSD/FreeBSD/BSDI.
+
+Rewrote filtering to use a more generic mask & match procedure for
+checking if a packet matches a rule.
+
+2.5.2	27/4/95		- Released
+
+"tcp/udp" and a non-initialised pointer caused the "proto" to become
+a `random' value; added "ip#/dotted.mask" notation to the BNF.
+From Adam W. Feigin  <feigin@iis.ee.ethz.ch>
+
+2.5.1	22/3/95		- Released
+
+"tcp/udp" had a strange effect (undesired) on getserv*() functions,
+causing protocol/service lookups to fail.  Reported by Matthew Green.
+
+2.5	17/3/95		- Released
+
+Added a new keyword "all" to BNF and parsing of tcpdump/etherfind/snoop
+output through the ipftest program.  Suggestions from:
+Michael Ciavarella (mikec@phyto.apana.org.au)
+
+Conflicts occur when "general" filter rules are used for ports and the
+lack of a "proto" when used with "port" matches other packets when only
+TCP/UDP are implied.
+Reported Matthew Green (mrg@fulcom.com.au);
+reported & fixed 6-8/3/95
+
+Added filtering of short TCP packets using "with short" 28/2/95
+(These can possibly slip by checks for the various flags).  Short UDP
+or ICMP are dropped to the floor and logged.
+
+Added filtering of fragmented packets using "with frag" 24/2/95
+
+Port to NetBSD-current completed 20/2/95, using LKM.
+
+Added logging of the rule # which caused the logging to happen and the
+interface on which the packet is currently as suggested by
+Andreas Greulich (greulich@math-stat.unibe.ch) 10/2/95
+
+2.4	9/2/95		- Released
+Fixed saving of IP headers in ICMP packets.
+
+2.3	29/1/95
+Added ipf -F [in|out|all] to flush filter rule sets (SIOCIPFFL).
+Fixed iplread() and iplsave() with help from Marc Huber.
+
+2.2	7/1/95		- Released
+Added code from Marc Huber <huber@fzi.de> to allow it to allocate
+its own major char number dynamically when modload'ing.  Fixed up
+use of <, >, <=, >= and >< for ports.
+
+2.1	21/12/94	- Released
+repackaged to include the correct ip_output.c and ip_input.c *goof*
+
+2.0	18/12/94	- Released
+added code to check for port ranges - complete.
+rewrote to work as a loadable kernel module - complete.
+
+1.1
+added code for ouput filtering as well as input filtering and added support for logging to a simple character device of packet headers.
+
+1.0	22/04/93	- Released
+First release cut.
+
diff --git a/contrib/ipfilter/IMPORTANT b/contrib/ipfilter/IMPORTANT
new file mode 100644
index 0000000..00272f2
--- /dev/null
+++ b/contrib/ipfilter/IMPORTANT
@@ -0,0 +1,41 @@
+		****************************************
+			     IMPORTANT NOTICE
+		****************************************
+1)
+
+If you're using this software and have a rule which ends like this:
+
+flags S
+
+(for TCP), then to make it totally effective, you need to change it to appear
+as follows:
+
+flags S/SA
+
+The problem is that the old code would compare all the TCP flags against the
+rule (which just has "S") to see if that matched exactly.  It is very possible
+for this to not be the case and in these cases, the rule would fail to match
+a 'valid' TCP SYN packet.
+
+Why does it need to be "S/SA" and not "S/S" ?
+
+"S/S" will match the SYN-ACK as well the SYN.
+
+By defalt, "flags S" will now be converted to "flags S/AUPRFS".
+
+If you have any queries regarding this, see the examples and ipf(4).
+If you still have a query or suggestion, please email me.
+
+
+2)
+
+If a filter rule used, in combination port comparisons and the flags
+keywords, a "short" TCP packet, if not explicitly blocked high up in
+the list of packets, would actually get matched even though it would
+otherwise not have been (due to the ports not).  This behaviour has
+subsequently been fixed.
+
+
+Darren
+darrenr@cyber.com.au
+		****************************************
diff --git a/contrib/ipfilter/INSTALL.FreeBSD b/contrib/ipfilter/INSTALL.FreeBSD
new file mode 100644
index 0000000..3910f4d
--- /dev/null
+++ b/contrib/ipfilter/INSTALL.FreeBSD
@@ -0,0 +1,41 @@
+
+To build a kernel for use with the loadable kernel module, follow these
+steps:
+	1. do "make bsd"
+
+	2. do "make install-bsd"
+	   (probably has to be done as root)
+
+	3.  run "FreeBSD/minstall" as root
+
+	4. build a new kernel
+
+	5. install and reboot with the new kernel
+
+	6. use modload(8) to load the packet filter with:
+		modload if_ipl.o
+
+	7. do "modstat" to confirm that it has been loaded successfully.
+
+There is no need to use mknod to create the device in /dev;
+- upon loading the module, it will create itself with the correct values,
+  under the name (IPL_NAME) from the Makefile.  It will also remove itself
+  from /dev when it is modunload'd.
+
+To build a kernel with the IP filter, follow these steps:
+
+	1. do "make bsd"
+
+	2. do "make install-bsd"
+	   (probably has to be done as root)
+
+	3.  run "FreeBSD/kinstall" as root
+
+	4. build a new kernel
+
+	5. create /dev/ipl with "mknod /dev/ipl c 20 0".
+
+	6. install and reboot with the new kernel
+
+Darren Reed
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/INSTALL.NetBSD b/contrib/ipfilter/INSTALL.NetBSD
new file mode 100644
index 0000000..2387827
--- /dev/null
+++ b/contrib/ipfilter/INSTALL.NetBSD
@@ -0,0 +1,48 @@
+
+To build a kernel for use with the loadable kernel module, follow these
+steps:
+	1. do "make bsd"
+
+	2. do "make install-bsd"
+	   (probably has to be done as root)
+
+	3(a) NetBSD systems prior to 1.2:
+		run "NetBSD/minstall" as root
+	3(b) NetBSD 1.2 systems or later:
+		run "NetBSD-1.2/minstall" as root
+
+	4. build a new kernel
+
+	5. install and reboot with the new kernel
+
+	6. use modload(8) to load the packet filter with:
+		modload if_ipl.o
+
+	7. do "modstat" to confirm that it has been loaded successfully.
+
+There is no need to use mknod to create the device in /dev;
+- upon loading the module, it will create itself with the correct values,
+  under the name (IPL_NAME) from the Makefile.  It will also remove itself
+  from /dev when it is modunload'd.
+
+To build a kernel with the IP filter, follow these steps:
+
+	1. do "make bsd"
+
+	2. do "make install-bsd"
+	   (probably has to be done as root)
+
+	3(a) NetBSD systems prior to 1.2:
+		run "NetBSD/kinstall" as root
+	3(b) NetBSD 1.2 systems or later:
+		run "NetBSD-1.2/kinstall" as root
+
+	4. build a new kernel
+
+	5. create /dev/ipl with "mknod /dev/ipl c 59 0".
+	   (for NetBSD-1.2, use "mknod /dev/ipl c 49 0")
+
+	6. install and reboot with the new kernel
+
+Darren Reed
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/INSTALL.Sol2 b/contrib/ipfilter/INSTALL.Sol2
new file mode 100644
index 0000000..6ed6473
--- /dev/null
+++ b/contrib/ipfilter/INSTALL.Sol2
@@ -0,0 +1,27 @@
+
+For those running Solaris 2.5, please read COMPILE.2.5 before building
+IP Filter.
+
+Type "make solaris" to build all the required binaries.
+
+Once IP Filter has been successfully compiled, you may then install it using
+the usual package method (using pkgadd), however, the package needs to be
+created, prior to pkgadd'ing.  To create the package in /var/spoo/pkg, change
+directory to SunOS5 and enter the following command:
+
+make package
+
+If you wish to then install it using `pkgadd', run the following command:
+
+pkgadd -s '/var/spool/pkg'
+
+As part of the postinstall script, it will install loadable kernel module
+as part of Solaris 2 (using add_drv) making it available for immeadiate use.
+
+IP Filter will be installed into /opt/CYBSipf (programs, manual pages and
+examples) and create a directory /etc/opt/CYBSipf with a null body file
+called "ipf.conf" using touch.  The rc scripts have been written to look
+for the configuration file here, using the installed binaries in /sbin.
+
+Darren Reed
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/INSTALL.SunOS b/contrib/ipfilter/INSTALL.SunOS
new file mode 100644
index 0000000..836d121
--- /dev/null
+++ b/contrib/ipfilter/INSTALL.SunOS
@@ -0,0 +1,36 @@
+
+To install as a Loadable Kernel Module (LKM):
+
+	1. do a "make sunos4" in this directory
+
+	2. Run the script "SunOS4/minstall" as root.
+
+	3. change directory to SunOS4 and run "make install"
+
+	4. Reboot using the new kernel
+
+	5. use modload(8) to load the packet filter with:
+		modload if_ipl.o
+
+	6. do "modstat" to confirm that it has been loaded successfully.
+
+	There is no need to use mknod to create the device in /dev;
+	- upon loading the module, it will create itself with the correct
+	  values, under the name (IPL_NAME) from the Makefile.  It will
+	  also remove itself from /dev when it is modunload'd.
+
+
+To install as part of a SunOS 4.1.x kernel:
+
+	1. do a "make sunos4" in this directory
+
+	2. Run the script "SunOS4/kinstall" as root.
+		NOTE: This script sets up /dev/ipl as char. device 59,0
+			in /sys/sun/conf.c
+
+	3. Do "mknod /dev/ipl c 59 0" as root.
+
+	4. Reboot using the new kernel
+
+Darren Reed
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/INSTALL.xBSD b/contrib/ipfilter/INSTALL.xBSD
new file mode 100644
index 0000000..9ab66f1
--- /dev/null
+++ b/contrib/ipfilter/INSTALL.xBSD
@@ -0,0 +1,39 @@
+
+To build a kernel for use with the loadable kernel module, follow these
+steps:
+	1. do "make bsd"
+
+	2. cd to the "BSD" directory and type "make install"
+
+	3. run "4bsd/minstall" as root
+
+	4. build a new kernel
+
+	5. install and reboot with the new kernel
+
+	6. use modload(8) to load the packet filter with:
+		modload if_ipl.o
+
+	7. do "modstat" to confirm that it has been loaded successfully.
+
+There is no need to use mknod to create the device in /dev;
+- upon loading the module, it will create itself with the correct values,
+  under the name (IPL_NAME) from the Makefile.  It will also remove itself
+  from /dev when it is modunload'd.
+
+To build a kernel with the IP filter, follow these steps:
+
+	1. do "make bsd"
+
+	2. cd to the "BSD" directory and type "make install"
+
+	3. run "4bsd/kinstall" as root
+
+	4. build a new kernel
+
+	5. create /dev/ipl with "mknod /dev/ipl c 59 0".
+
+	6. install and reboot with the new kernel
+
+Darren
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/LICENCE b/contrib/ipfilter/LICENCE
new file mode 100644
index 0000000..c5a7767
--- /dev/null
+++ b/contrib/ipfilter/LICENCE
@@ -0,0 +1,16 @@
+/*
+ * (C)opyright 1993, 1994, 1995 by Darren Reed.
+ *
+ * The author accepts no responsibility for the use of this software and
+ * provides it on an ``as is'' basis without express or implied warranty.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * I hate legaleese, don't you ?
+ */
diff --git a/contrib/ipfilter/Makefile b/contrib/ipfilter/Makefile
new file mode 100644
index 0000000..d0d5309
--- /dev/null
+++ b/contrib/ipfilter/Makefile
@@ -0,0 +1,158 @@
+#
+# (C)opyright 1993, 1994, 1995 by Darren Reed.
+#
+# This code may be freely distributed as long as it retains this notice
+# and is not changed in any way.  The author accepts no responsibility
+# for the use of this software.  I hate legaleese, don't you ?
+#
+# $Id: Makefile,v 2.0.1.4 1997/02/08 06:39:28 darrenr Exp $
+#
+# where to put things.
+#
+BINDEST=/usr/local/ip_fil3.1.1/bin
+SBINDEST=/usr/local/ip_fil3.1.1/sbin
+MANDIR=/usr/local/ip_fil3.1.1/man
+CC=gcc
+DEBUG=-g
+CFLAGS=-I$$(TOP)
+DCPU=`uname -m`
+#
+# To enable this to work as a Loadable Kernel Module...
+#
+IPFLKM=-DIPFILTER_LKM
+#
+# To enable logging of blocked/passed packets...
+#
+IPFLOG=-DIPFILTER_LOG
+#
+# The facility you wish to log messages from ipmon to syslogd with.
+#
+LOGFAC=-DLOGFAC=LOG_LOCAL0
+#
+# For packets which don't match any pass rules or any block rules, set either
+# FR_PASS or FR_BLOCK (respectively).  It defaults to FR_PASS if left
+# undefined.  This is ignored for ipftest, which can thus return three
+# results: pass, block and nomatch.  This is the sort of "block unless
+# explicitly allowed" type #define switch.
+#
+POLICY=-DNOMATCH=FR_PASS
+#
+MFLAGS="BINDEST=$(BINDEST)" "SBINDEST=$(SBINDEST)" "MANDIR=$(MANDIR)" \
+	"CC=$(CC)" 'CFLAGS=$(CFLAGS) $(SOLARIS2)' "IPFLKM=$(IPFLKM)" \
+	"IPFLOG=$(IPFLOG)" "LOGFAC=$(LOGFAC)" "POLICY=$(POLICY)" \
+	"SOLARIS2=$(SOLARIS2)" "DEBUG=$(DEBUG)" "ARCH=$(ARCH)"
+#
+########## ########## ########## ########## ########## ########## ##########
+#
+CP=/bin/cp
+RM=/bin/rm
+CHMOD=/bin/chmod
+INSTALL=install
+#
+DFLAGS=$(IPFLKM) $(IPFLOG) $(DEF)
+
+all:
+	@echo "Chose one of the following targets for making IP filter:"
+	@echo ""
+	@echo "solaris	- auto-selects SunOS4.1.x/Solaris 2.[45]/Soalris2.[45]-x86"
+	@echo "bsd	- compile for 4.4BSD based Unixes (FreeBSD/NetBSD/OpenBSD)"
+	@echo "bsdi	- compile for BSD/OS"
+	@echo ""
+
+tests:
+	@if [ -d test ]; then (cd test; make) \
+	else echo test directory not present, sorry; fi
+
+sunos solaris:
+	./buildsunos
+
+sunos4 solaris1:
+	(cd SunOS4; make build TOP=.. $(MFLAGS); cd ..)
+	(cd SunOS4; make -f Makefile.ipsend TOP=.. $(MFLAGS); cd ..)
+
+sunos5 solaris2:
+	(cd SunOS5/$(DCPU); make build TOP=../.. $(MFLAGS) "SOLARIS2=$(SOLARIS2)" "CPU=-Dsparc -D__sparc__"; cd ..)
+	(cd SunOS5/$(DCPU); make -f Makefile.ipsend TOP=../.. $(MFLAGS); cd ..)
+
+sunos5x86 solaris2x86:
+	(cd SunOS5/$(DCPU); make build TOP=../.. $(MFLAGS) "SOLARIS2=$(SOLARIS2)" "CPU=-Di86pc -Di386 -D__i386__"; cd ..)
+	(cd SunOS5/$(DCPU); make -f Makefile.ipsend TOP=../.. $(MFLAGS); cd ..)
+
+bsd netbsd freebsd:
+	-if [ ! -d BSD/$(DCPU) ] ; then mkdir BSD/$(DCPU); fi
+	-rm -f BSD/$(DCPU)/Makefile BSD/$(DCPU)/Makefile.ipsend
+	-ln -s ../Makefile BSD/$(DCPU)/Makefile
+	-ln -s ../Makefile.ipsend BSD/$(DCPU)/Makefile.ipsend
+	(cd BSD/$(DCPU); make build "TOP=../.." $(MFLAGS); cd ..)
+	(cd BSD/$(DCPU); make -f Makefile.ipsend "TOP=../.." $(MFLAGS); cd ..)
+
+bsdi bsdos:
+	-if [ ! -d BSD/$(DCPU) ] ; then mkdir BSD/$(DCPU); fi
+	-rm -f BSD/$(DCPU)/Makefile BSD/$(DCPU)/Makefile.ipsend
+	-ln -s ../Makefile BSD/$(DCPU)/Makefile
+	-ln -s ../Makefile.ipsend BSD/$(DCPU)/Makefile.ipsend
+	(cd BSD/$(DCPU); make build "TOP=../.." $(MFLAGS) LKM= ; cd ..)
+	(cd BSD/$(DCPU); make -f Makefile.ipsend "TOP=../.." $(MFLAGS); cd ..)
+
+clean:
+	${RM} -f core *.o ipt fils ipf ipfstat ipftest ipmon if_ipl \
+	vnode_if.h $(LKM)
+	(cd SunOS4; make clean)
+	(cd SunOS5; make clean)
+	(cd BSD; make clean)
+	[ -d test ] && (cd test; make clean)
+	(cd ipsend; make clean)
+
+clean-bsd:
+	(cd BSD; make clean)
+
+clean-sunos4:
+	(cd SunOS4; make clean)
+
+clean-sunos5:
+	(cd SunOS5; make clean)
+
+get:
+	-@for i in ipf.c ipt.h solaris.c ipf.h kmem.c ipft_ef.c linux.h \
+		ipft_pc.c fil.c ipft_sn.c mln_ipl.c fils.c ipft_td.c \
+		mls_ipl.c ip_compat.h ipl.h opt.c ip_fil.c ipl_ldev.c \
+		parse.c ip_fil.h ipmon.c pcap.h ip_sfil.c ipt.c snoop.h \
+		ip_state.c ip_state.h ip_nat.c ip_nat.h ip_frag.c \
+		ip_frag.h ip_sfil.c misc.c; do \
+		if [ ! -f $$i ] ; then \
+			echo "getting $$i"; \
+			sccs get $$i; \
+		fi \
+	done
+
+install-bsd: bsd
+	(cd BSD/$(DCPU); $(MAKE) "TOP=../.." install)
+install-sunos4: solaris
+	(cd SunOS4; $(MAKE) "TOP=.." install)
+install-sunos5: solaris
+	(cd SunOS5; $(MAKE) "TOP=.." install)
+
+# XXX FIXME: bogus to depend on all!
+install: all ip_fil.h
+	-$(CP) ip_fil.h /usr/include/netinet/ip_fil.h
+	-$(CHMOD) 444 /usr/include/netinet/ip_fil.h
+	-$(INSTALL) -cs -g wheel -m 755 -o root ipfstat ipf ipnat $(SBINDEST)
+	-$(INSTALL) -cs -g wheel -m 755 -o root ipmon ipftest $(BINDEST)
+	(cd man; $(MAKE) INSTALL=$(INSTALL) MANDIR=$(MANDIR) install; cd ..)
+
+rcsget:
+	-@for i in ipf.c ipt.h solaris.c ipf.h kmem.c ipft_ef.c linux.h \
+		ipft_pc.c fil.c ipft_sn.c mln_ipl.c fils.c ipft_td.c \
+		mls_ipl.c ip_compat.h ipl.h opt.c ip_fil.c ipl_ldev.c \
+		parse.c ip_fil.h ipmon.c pcap.h ip_sfil.c ipt.c snoop.h \
+		ip_state.c ip_state.h ip_nat.c ip_nat.h ip_frag.c \
+		ip_frag.h ip_sfil.c misc.c; do \
+		if [ ! -f $$i ] ; then \
+			echo "getting $$i"; \
+			co $$i; \
+		fi \
+	done
+
+do-cvs:
+	find . -type d -name CVS -print | xargs /bin/rm -rf
+	find . -type f -name .cvsignore -print | xargs /bin/rm -f
diff --git a/contrib/ipfilter/README b/contrib/ipfilter/README
new file mode 100644
index 0000000..b959d40
--- /dev/null
+++ b/contrib/ipfilter/README
@@ -0,0 +1,93 @@
+IP Filter - What's this about ?
+============================
+
+  The idea behind this package is allow those who use Unix workstations as
+routers (a common occurance in Universities it appears) to apply packet
+filtering to packets going in and out of them.  This package has been
+tested on all versions of SunOS 4.1 and Solaris 2.4/2.5, running on Sparcs.
+It is also quite possible for this small kernel extension to be installed
+and used effectively on Sun workstations which don't route IP, just for
+added security.  It can also be integrated with the multicast patches.
+It has also been tested successfully on all of the modern free BSDs as
+well as BSDI.
+
+   The filter keeps a rule list for both inbound and outbound sides of
+the IP packet queue and a check is made as early as possible, aiming to
+stop the packet before it even gets as far as being checked for source
+route options.  In the file "BNF", a set of rules for constructing filter
+rules understood by this package is given.  The files in the directory
+"rules", "example.1" ... "example.sr" show example rules you might apply.
+
+   In practise, I've successfully isolated a workstation from all
+machines except the NFS file servers on its local subnets (yeah, ok, so
+this doesn't really increase security, because of NFS, but you get the
+drift on how it can be applied and used).  I've also successfully
+setup and maintained my own firewalls using it with TIS's Firewall Toolkit,
+including using it on an mbone router.
+
+   When using it with multicast IP, the calls to fr_check() should be
+before the packet is unwrapped and after it is encapsulated.  So the
+filter routines will see the packet as a UDP packet, protocol XYZ.
+Whether this is better or worse than having it filter on class D addresses
+is debateable, but the idea behind this package is to be able to
+discriminate between packets as they are on the 'wire', before they
+get routed anywhere, etc.
+
+   It is worth noting, that it is possible, using a small MTU and
+generating tiny fragmented IP packets to generate a TCP packet which
+doesn't contain enough information to filter on the "flags".  Filtering
+on these types of packets is possible, but under the more general case
+of the packets being "short".  ICMP and UDP packets which are too small
+(they don't contain a complete header) are dropped and logged, no questions
+asked.  When filtering on fragmented packets, the last fragment will get
+through for TCP/UDP/ICMP packets.
+
+
+Some general notes.
+-------------------
+   To add/delete a rule from memory, access to the device in /dev is needed,
+allowing non-root maintenaince.  The filter list in kernel memory is built
+from the kernel's heap.  Each packet coming *in* or *out* is checked against
+the appropriate list, rejects dropped, others passed through.  Thus this will
+work on an individual host, not just gateways.  Presently there is only one
+list for all interfaces, the changes required to make it a per-interface list
+require more .o replacements for the kernel.  When checking a packet, the
+packet is compared to the entire list from top to bottom, the last matching
+line being effective.
+
+
+What does what ?
+----------------
+if_fil.o  (Loadable kernel module)
+	- additional kernel routines to check an access list as to whether
+	  or not to drop or pass a packet.  It currently defaults to pass
+	  on all packets.
+
+ipfstat
+	- digs through your kernel (need to check #define VMUNIX in fils.c)
+	  and /dev/kmem for the access filter list and mini stats table.
+	  Obviously needs to be run priviledged if required.
+
+ipf
+	- reads the files passed as parameters as input files containing new
+	  filter rules to add/delete to the kernel list.  The lines are
+	  inserted in order; the first line is inserted first, and ends up
+	  first on the list.  Subsequent invocations append to the list
+	  unless specified otherwise.
+
+ipftest
+	- test the ruleset given by filename.  Reads in the ruleset and then
+	  waits for stdin.
+
+	  See the man pages (ipf.1, ipftest.1, ipfstat.8) for more detailed
+	  information on what the above do.
+
+mkfilters
+	- suggests a set of filter rules to employ and suggests how to add
+	  routes to back these up.
+
+BNF
+	- BNF rule set for the filter rules
+
+Darren Reed
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/bsdinstall b/contrib/ipfilter/bsdinstall
new file mode 100755
index 0000000..ce921b6
--- /dev/null
+++ b/contrib/ipfilter/bsdinstall
@@ -0,0 +1,83 @@
+#! /bin/sh
+#
+#	@(#)install.sh	4.5	(Berkeley)	10/12/83
+#
+cmd=/bin/mv
+strip=""
+chmod="chmod 755"
+chown="chown -f root"
+chgrp="chgrp -f bin"
+while true ; do
+	case $1 in
+		-s )	strip="strip"
+			shift
+			;;
+		-c )	cmd="cp"
+			shift
+			;;
+		-m )	chmod="chmod $2"
+			shift
+			shift
+			;;
+		-o )	chown="chown -f $2"
+			shift
+			shift
+			;;
+		-g )	chgrp="chgrp -f $2"
+			shift
+			shift
+			;;
+		-d )	cmd="mkdir"
+			shift
+			;;
+		* )	break
+			;;
+	esac
+done
+
+if [ ! ${2-""} ]
+then	echo "install: no destination specified"
+	exit 1
+fi
+if [ ${3-""} ]
+then	echo "install: too many files specified -> $*"
+	exit 1
+fi
+if [ $1 = $2 -o $2 = . ]
+then	echo "install: can't move $1 onto itself"
+	exit 1
+fi
+case $cmd in
+/bin/mkdir )
+	file=$2/$1
+	;;
+* )
+	if [ '!' -f $1 ]
+	then	echo "install: can't open $1"
+		exit 1
+	fi
+	if [ -d $2 ]
+	then	file=$2/$1
+	else	file=$2
+	fi
+	/bin/rm -f $file
+	;;
+esac
+
+case $cmd in
+/bin/mkdir )
+	if [ ! -d "$file" ]
+	then	$cmd $file
+	fi
+	;;
+* )
+	$cmd $1 $file
+	if [ $strip ]
+	then	$strip $file
+	fi
+	;;
+esac
+
+$chown $file
+$chgrp $file
+$chmod $file
diff --git a/contrib/ipfilter/buildsunos b/contrib/ipfilter/buildsunos
new file mode 100755
index 0000000..dd2aa38
--- /dev/null
+++ b/contrib/ipfilter/buildsunos
@@ -0,0 +1,23 @@
+#! /bin/sh
+# $Id: buildsunos,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $
+:
+rev=`uname -r | sed -e 's/^\([^\.]*\)\..*/\1/'`
+cpu=`uname -m`
+if [ $rev = 5 ] ; then
+	solrev=`uname -r | sed -e 's/^\([0-9]*\)\.\([0-9]*\)$/\2/'`
+	mkdir -p SunOS5/${cpu}
+	/bin/rm -f SunOS5/${cpu}/Makefile
+	/bin/rm -f SunOS5/${cpu}/Makefile.ipsend
+	ln -s ../Makefile SunOS5/${cpu}/Makefile
+	ln -s ../Makefile.ipsend SunOS5/${cpu}/Makefile.ipsend
+fi
+if [ $cpu = i86pc ] ; then
+	make ${1+"$@"} sunos5x86 SOLARIS2="-DSOLARIS2=$solrev" DCPU=${cpu}
+	exit $?
+fi
+if [ x$solrev = x ] ; then
+	make ${1+"$@"} sunos$rev "ARCH=`uname -m`"
+	exit $?
+fi
+make ${1+"$@"} sunos$rev SOLARIS2="-DSOLARIS2=$solrev" DCPU=${cpu}
+exit $?
diff --git a/contrib/ipfilter/etc/protocols b/contrib/ipfilter/etc/protocols
new file mode 100644
index 0000000..b41aa1d
--- /dev/null
+++ b/contrib/ipfilter/etc/protocols
@@ -0,0 +1,95 @@
+icmp		1	ICMP		# Internet Control Message
+igmp		2	IGMP		# Internet Group Management
+ggp		3	GGP		# Gateway-to-Gateway
+ip		4	IP		# IP in IP (encasulation)
+st		5	ST		# Stream
+tcp		6	TCP		# Transmission Control
+ucl		7	UCL		# UCL
+egp		8	EGP		# Exterior Gateway Protocol
+igp		9	IGP		# any private interior gateway
+bbn-rcc-mon	10	BBN-RCC-MON	# BBN RCC Monitoring
+nvp-ii		11	NVP-II		# Network Voice Protocol
+pup		12	PUP		# PUP
+argus		13	ARGUS		# ARGUS
+emcon		14	EMCON		# EMCON
+xnet		15	XNET		# Cross Net Debugger
+chaos		16	CHAOS		# Chaos
+udp		17	UDP		# User Datagram
+mux		18	MUX		# Multiplexing
+dcn-meas	19	DCN-MEAS	# DCN Measurement Subsystems
+hmp		20	HMP		# Host Monitoring
+prm		21	PRM		# Packet Radio Measurement
+xns-idp		22	XNS-IDP		# XEROX NS IDP
+trunk-1		23	TRUNK-1		# Trunk-1
+trunk-2		24	TRUNK-2		# Trunk-2
+leaf-1		25	LEAF-1		# Leaf-1
+leaf-2		26	LEAF-2		# Leaf-2
+rdp		27	RDP		# Reliable Data Protocol
+irtp		28	IRTP		# Internet Reliable Transaction
+iso-tp4		29	ISO-TP4		# ISO Transport Protocol Class 4
+netblt		30	NETBLT		# Bulk Data Transfer Protocol
+mfe-nsp		31	MFE-NSP		# MFE Network Services Protocol
+merit-inp	32	MERIT-INP	# MERIT Internodal Protocol
+sep		33	SEP		# Sequential Exchange Protocol
+3pc		34	3PC		# Third Party Connect Protocol
+idpr		35	IDPR		# Inter-Domain Policy Routing Protocol
+xtp		36	XTP		# XTP
+ddp		37	DDP		# Datagram Delivery Protocol
+idpr-cmtp	38	IDPR-CMTP	# IDPR Control Message Transport Proto
+tp++		39	TP++		# TP++ Transport Protocol
+il		40	IL		# IL Transport Protocol
+sip		41	SIP		# Simple Internet Protocol
+sdrp		42	SDRP		# Source Demand Routing Protocol
+sip-sr		43	SIP-SR		# SIP Source Route
+sip-frag	44	SIP-FRAG	# SIP Fragment
+idrp		45	IDRP		# Inter-Domain Routing Protocol
+rsvp		46	RSVP		# Reservation Protocol
+gre		47	GRE		# General Routing Encapsulation
+mhrp		48	MHRP		# Mobile Host Routing Protocol
+bna		49	BNA		# BNA
+sipp-esp	50	SIPP-ESP	# SIPP Encap Security Payload
+sipp-ah		51	SIPP-AH		# SIPP Authentication Header
+i-nlsp		52	I-NLSP		# Integrated Net Layer Security TUBA
+swipe		53	SWIPE		# IP with Encryption
+nhrp		54	NHRP		# NBMA Next Hop Resolution Protocol
+any		61	any		# host internal protocol
+cftp		62	CFTP		# CFTP
+any		63	any		# local network
+sat-expak	64	SAT-EXPAK	# SATNET and Backroom EXPAK
+kryptolan	65	KRYPTOLAN	# Kryptolan
+rvd		66	RVD		# MIT Remote Virtual Disk Protocol
+ippc		67	IPPC		# Internet Pluribus Packet Core
+any		68	any		# distributed file system
+sat-mon		69	SAT-MON		# SATNET Monitoring
+visa		70	VISA		# VISA Protocol
+ipcv		71	IPCV		# Internet Packet Core Utility
+cpnx		72	CPNX		# Computer Protocol Network Executive
+cphb		73	CPHB		# Computer Protocol Heart Beat
+wsn		74	WSN		# Wang Span Network
+pvp		75	PVP		# Packet Video Protocol
+br-sat-mon	76	BR-SAT-MON	# Backroom SATNET Monitoring
+sun-nd		77	SUN-ND		# SUN ND PROTOCOL-Temporary
+wb-mon		78	WB-MON		# WIDEBAND Monitoring
+wb-expak	79	WB-EXPAK	# WIDEBAND EXPAK
+iso-ip		80	ISO-IP		# ISO Internet Protocol
+vmtp		81	VMTP		# VMTP
+secure-vmtp	82	SECURE-VMTP	# SECURE-VMTP
+vines		83	VINES		# VINES
+ttp		84	TTP		# TTP
+nsfnet-igp	85	NSFNET-IGP	# NSFNET-IGP
+dgp		86	DGP		# Dissimilar Gateway Protocol
+tcf		87	TCF		# TCF
+igrp		88	IGRP		# IGRP
+ospfigp		89	OSPFIGP		# OSPFIGP
+sprite-rpc	90	Sprite-RPC	# Sprite RPC Protocol
+larp		91	LARP		# Locus Address Resolution Protocol
+mtp		92	MTP		# Multicast Transport Protocol
+ax.25		93	AX.25		# AX.25 Frames
+ipip		94	IPIP		# IP-within-IP Encapsulation Protocol
+micp		95	MICP		# Mobile Internetworking Control Pro.
+scc-sp		96	SCC-SP		# Semaphore Communications Sec. Pro.
+etherip		97	ETHERIP		# Ethernet-within-IP Encapsulation
+encap		98	ENCAP		# Encapsulation Header
+any		99	any		# private encryption scheme
+gmtp		100	GMTP		# GMTP
+reserved	255	Reserved	# 
diff --git a/contrib/ipfilter/etc/services b/contrib/ipfilter/etc/services
new file mode 100644
index 0000000..90dd07a
--- /dev/null
+++ b/contrib/ipfilter/etc/services
@@ -0,0 +1,731 @@
+tcpmux		1/tcp		# TCP Port Service Multiplexer
+tcpmux		1/udp		# TCP Port Service Multiplexer
+compressnet	2/tcp		# Management Utility
+compressnet	2/udp		# Management Utility
+compressnet	3/tcp		# Compression Process
+compressnet	3/udp		# Compression Process
+rje		5/tcp		# Remote Job Entry
+rje		5/udp		# Remote Job Entry
+echo		7/tcp		# Echo
+echo		7/udp		# Echo
+discard		9/tcp		# Discard
+discard		9/udp		# Discard
+systat		11/tcp		# Active Users
+systat		11/udp		# Active Users
+daytime		13/tcp		# Daytime
+daytime		13/udp		# Daytime
+qotd		17/tcp		# Quote of the Day
+qotd		17/udp		# Quote of the Day
+msp		18/tcp		# Message Send Protocol
+msp		18/udp		# Message Send Protocol
+chargen		19/tcp		# Character Generator
+chargen		19/udp		# Character Generator
+ftp-data	20/tcp		# File Transfer
+ftp-data	20/udp		# File Transfer
+ftp		21/tcp		# File Transfer
+ftp		21/udp		# File Transfer
+telnet		23/tcp		# Telnet
+telnet		23/udp		# Telnet
+smtp		25/tcp		# Simple Mail Transfer
+smtp		25/udp		# Simple Mail Transfer
+nsw-fe		27/tcp		# NSW User System FE
+nsw-fe		27/udp		# NSW User System FE
+msg-icp		29/tcp		# MSG ICP
+msg-icp		29/udp		# MSG ICP
+msg-auth	31/tcp		# MSG Authentication
+msg-auth	31/udp		# MSG Authentication
+dsp		33/tcp		# Display Support Protocol
+dsp		33/udp		# Display Support Protocol
+time		37/tcp		# Time
+time		37/udp		# Time
+rap		38/tcp		# Route Access Protocol
+rap		38/udp		# Route Access Protocol
+rlp		39/tcp		# Resource Location Protocol
+rlp		39/udp		# Resource Location Protocol
+graphics	41/tcp		# Graphics
+graphics	41/udp		# Graphics
+nameserver	42/tcp		# Host Name Server
+nameserver	42/udp		# Host Name Server
+nicname		43/tcp		# Who Is
+nicname		43/udp		# Who Is
+mpm-flags	44/tcp		# MPM FLAGS Protocol
+mpm-flags	44/udp		# MPM FLAGS Protocol
+mpm		45/tcp		# Message Processing Module
+mpm		45/udp		# Message Processing Module
+mpm-snd		46/tcp		# MPM
+mpm-snd		46/udp		# MPM
+ni-ftp		47/tcp		# NI FTP
+ni-ftp		47/udp		# NI FTP
+auditd		48/tcp		# Digital Audit Daemon
+auditd		48/udp		# Digital Audit Daemon
+re-mail-ck	50/tcp		# Remote Mail Checking Protocol
+re-mail-ck	50/udp		# Remote Mail Checking Protocol
+la-maint	51/tcp		# IMP Logical Address Maintenance
+la-maint	51/udp		# IMP Logical Address Maintenance
+xns-time	52/tcp		# XNS Time Protocol
+xns-time	52/udp		# XNS Time Protocol
+domain		53/tcp		# Domain Name Server
+domain		53/udp		# Domain Name Server
+xns-ch		54/tcp		# XNS Clearinghouse
+xns-ch		54/udp		# XNS Clearinghouse
+isi-gl		55/tcp		# ISI Graphics Language
+isi-gl		55/udp		# ISI Graphics Language
+xns-auth	56/tcp		# XNS Authentication
+xns-auth	56/udp		# XNS Authentication
+xns-mail	58/tcp		# XNS Mail
+xns-mail	58/udp		# XNS Mail
+ni-mail		61/tcp		# NI MAIL
+ni-mail		61/udp		# NI MAIL
+acas		62/tcp		# ACA Services
+acas		62/udp		# ACA Services
+covia		64/tcp		# Communications Integrator (CI)
+covia		64/udp		# Communications Integrator (CI)
+tacacs-ds	65/tcp		# TACACS-Database Service
+tacacs-ds	65/udp		# TACACS-Database Service
+sql*net		66/tcp		# Oracle SQL*NET
+sql*net		66/udp		# Oracle SQL*NET
+bootps		67/tcp		# Bootstrap Protocol Server
+bootps		67/udp		# Bootstrap Protocol Server
+bootpc		68/tcp		# Bootstrap Protocol Client
+bootpc		68/udp		# Bootstrap Protocol Client
+tftp		69/tcp		# Trivial File Transfer
+tftp		69/udp		# Trivial File Transfer
+gopher		70/tcp		# Gopher
+gopher		70/udp		# Gopher
+netrjs-1	71/tcp		# Remote Job Service
+netrjs-1	71/udp		# Remote Job Service
+netrjs-2	72/tcp		# Remote Job Service
+netrjs-2	72/udp		# Remote Job Service
+netrjs-3	73/tcp		# Remote Job Service
+netrjs-3	73/udp		# Remote Job Service
+netrjs-4	74/tcp		# Remote Job Service
+netrjs-4	74/udp		# Remote Job Service
+deos		76/tcp		# Distributed External Object Store
+deos		76/udp		# Distributed External Object Store
+vettcp		78/tcp		# vettcp
+vettcp		78/udp		# vettcp
+finger		79/tcp		# Finger
+finger		79/udp		# Finger
+www-http	80/tcp		# World Wide Web HTTP
+www-http	80/udp		# World Wide Web HTTP
+hosts2-ns	81/tcp		# HOSTS2 Name Server
+hosts2-ns	81/udp		# HOSTS2 Name Server
+xfer		82/tcp		# XFER Utility
+xfer		82/udp		# XFER Utility
+mit-ml-dev	83/tcp		# MIT ML Device
+mit-ml-dev	83/udp		# MIT ML Device
+ctf		84/tcp		# Common Trace Facility
+ctf		84/udp		# Common Trace Facility
+mit-ml-dev	85/tcp		# MIT ML Device
+mit-ml-dev	85/udp		# MIT ML Device
+mfcobol		86/tcp		# Micro Focus Cobol
+mfcobol		86/udp		# Micro Focus Cobol
+kerberos	88/tcp		# Kerberos
+kerberos	88/udp		# Kerberos
+su-mit-tg	89/tcp		# SU/MIT Telnet Gateway
+su-mit-tg	89/udp		# SU/MIT Telnet Gateway
+dnsix		90/tcp		# DNSIX Securit Attribute Token Map
+dnsix		90/udp		# DNSIX Securit Attribute Token Map
+mit-dov		91/tcp		# MIT Dover Spooler
+mit-dov		91/udp		# MIT Dover Spooler
+npp		92/tcp		# Network Printing Protocol
+npp		92/udp		# Network Printing Protocol
+dcp		93/tcp		# Device Control Protocol
+dcp		93/udp		# Device Control Protocol
+objcall		94/tcp		# Tivoli Object Dispatcher
+objcall		94/udp		# Tivoli Object Dispatcher
+supdup		95/tcp		# SUPDUP
+supdup		95/udp		# SUPDUP
+dixie		96/tcp		# DIXIE Protocol Specification
+dixie		96/udp		# DIXIE Protocol Specification
+swift-rvf	97/tcp		# Swift Remote Vitural File Protocol
+swift-rvf	97/udp		# Swift Remote Vitural File Protocol
+tacnews		98/tcp		# TAC News
+tacnews		98/udp		# TAC News
+metagram	99/tcp		# Metagram Relay
+metagram	99/udp		# Metagram Relay
+newacct		100/tcp
+hostname	101/tcp		# NIC Host Name Server
+hostname	101/udp		# NIC Host Name Server
+iso-tsap	102/tcp		# ISO-TSAP
+iso-tsap	102/udp		# ISO-TSAP
+gppitnp		103/tcp		# Genesis Point-to-Point Trans Net
+gppitnp		103/udp		# Genesis Point-to-Point Trans Net
+acr-nema	104/tcp		# ACR-NEMA Digital Imag. & Comm. 300
+acr-nema	104/udp		# ACR-NEMA Digital Imag. & Comm. 300
+csnet-ns	105/tcp		# Mailbox Name Nameserver
+csnet-ns	105/udp		# Mailbox Name Nameserver
+3com-tsmux	106/tcp		# 3COM-TSMUX
+3com-tsmux	106/udp		# 3COM-TSMUX
+rtelnet		107/tcp		# Remote Telnet Service
+rtelnet		107/udp		# Remote Telnet Service
+snagas		108/tcp		# SNA Gateway Access Server
+snagas		108/udp		# SNA Gateway Access Server
+pop2		109/tcp		# Post Office Protocol - Version 2
+pop2		109/udp		# Post Office Protocol - Version 2
+pop3		110/tcp		# Post Office Protocol - Version 3
+pop3		110/udp		# Post Office Protocol - Version 3
+sunrpc		111/tcp		# SUN Remote Procedure Call
+sunrpc		111/udp		# SUN Remote Procedure Call
+mcidas		112/tcp		# McIDAS Data Transmission Protocol
+mcidas		112/udp		# McIDAS Data Transmission Protocol
+auth		113/tcp		# Authentication Service
+auth		113/udp		# Authentication Service
+audionews	114/tcp		# Audio News Multicast
+audionews	114/udp		# Audio News Multicast
+sftp		115/tcp		# Simple File Transfer Protocol
+sftp		115/udp		# Simple File Transfer Protocol
+ansanotify	116/tcp		# ANSA REX Notify
+ansanotify	116/udp		# ANSA REX Notify
+uucp-path	117/tcp		# UUCP Path Service
+uucp-path	117/udp		# UUCP Path Service
+sqlserv		118/tcp		# SQL Services
+sqlserv		118/udp		# SQL Services
+nntp		119/tcp		# Network News Transfer Protocol
+nntp		119/udp		# Network News Transfer Protocol
+cfdptkt		120/tcp		# CFDPTKT
+cfdptkt		120/udp		# CFDPTKT
+erpc		121/tcp		# Encore Expedited Remote Pro.Call
+erpc		121/udp		# Encore Expedited Remote Pro.Call
+smakynet	122/tcp		# SMAKYNET
+smakynet	122/udp		# SMAKYNET
+ntp		123/tcp		# Network Time Protocol
+ntp		123/udp		# Network Time Protocol
+ansatrader	124/tcp		# ANSA REX Trader
+ansatrader	124/udp		# ANSA REX Trader
+locus-map	125/tcp		# Locus PC-Interface Net Map Ser
+locus-map	125/udp		# Locus PC-Interface Net Map Ser
+unitary		126/tcp		# Unisys Unitary Login
+unitary		126/udp		# Unisys Unitary Login
+locus-con	127/tcp		# Locus PC-Interface Conn Server
+locus-con	127/udp		# Locus PC-Interface Conn Server
+gss-xlicen	128/tcp		# GSS X License Verification
+gss-xlicen	128/udp		# GSS X License Verification
+pwdgen		129/tcp		# Password Generator Protocol
+pwdgen		129/udp		# Password Generator Protocol
+cisco-fna	130/tcp		# cisco FNATIVE
+cisco-fna	130/udp		# cisco FNATIVE
+cisco-tna	131/tcp		# cisco TNATIVE
+cisco-tna	131/udp		# cisco TNATIVE
+cisco-sys	132/tcp		# cisco SYSMAINT
+cisco-sys	132/udp		# cisco SYSMAINT
+statsrv		133/tcp		# Statistics Service
+statsrv		133/udp		# Statistics Service
+ingres-net	134/tcp		# INGRES-NET Service
+ingres-net	134/udp		# INGRES-NET Service
+loc-srv		135/tcp		# Location Service
+loc-srv		135/udp		# Location Service
+profile		136/tcp		# PROFILE Naming System
+profile		136/udp		# PROFILE Naming System
+netbios-ns	137/tcp		# NETBIOS Name Service
+netbios-ns	137/udp		# NETBIOS Name Service
+netbios-dgm	138/tcp		# NETBIOS Datagram Service
+netbios-dgm	138/udp		# NETBIOS Datagram Service
+netbios-ssn	139/tcp		# NETBIOS Session Service
+netbios-ssn	139/udp		# NETBIOS Session Service
+emfis-data	140/tcp		# EMFIS Data Service
+emfis-data	140/udp		# EMFIS Data Service
+emfis-cntl	141/tcp		# EMFIS Control Service
+emfis-cntl	141/udp		# EMFIS Control Service
+bl-idm		142/tcp		# Britton-Lee IDM
+bl-idm		142/udp		# Britton-Lee IDM
+imap2		143/tcp		# Interim Mail Access Protocol v2
+imap2		143/udp		# Interim Mail Access Protocol v2
+news		144/tcp		# NewS
+news		144/udp		# NewS
+uaac		145/tcp		# UAAC Protocol
+uaac		145/udp		# UAAC Protocol
+iso-tp0		146/tcp		# ISO-IP0
+iso-tp0		146/udp		# ISO-IP0
+iso-ip		147/tcp		# ISO-IP
+iso-ip		147/udp		# ISO-IP
+cronus		148/tcp		# CRONUS-SUPPORT
+cronus		148/udp		# CRONUS-SUPPORT
+aed-512		149/tcp		# AED 512 Emulation Service
+aed-512		149/udp		# AED 512 Emulation Service
+sql-net		150/tcp		# SQL-NET
+sql-net		150/udp		# SQL-NET
+hems		151/tcp		# HEMS
+hems		151/udp		# HEMS
+bftp		152/tcp		# Background File Transfer Program
+bftp		152/udp		# Background File Transfer Program
+sgmp		153/tcp		# SGMP
+sgmp		153/udp		# SGMP
+netsc-prod	154/tcp		# NETSC
+netsc-prod	154/udp		# NETSC
+netsc-dev	155/tcp		# NETSC
+netsc-dev	155/udp		# NETSC
+sqlsrv		156/tcp		# SQL Service
+sqlsrv		156/udp		# SQL Service
+knet-cmp	157/tcp		# KNET/VM Command/Message Protocol
+knet-cmp	157/udp		# KNET/VM Command/Message Protocol
+pcmail-srv	158/tcp		# PCMail Server
+pcmail-srv	158/udp		# PCMail Server
+nss-routing	159/tcp		# NSS-Routing
+nss-routing	159/udp		# NSS-Routing
+sgmp-traps	160/tcp		# SGMP-TRAPS
+sgmp-traps	160/udp		# SGMP-TRAPS
+snmp		161/tcp		# SNMP
+snmp		161/udp		# SNMP
+snmptrap	162/tcp		# SNMPTRAP
+snmptrap	162/udp		# SNMPTRAP
+cmip-man	163/tcp		# CMIP/TCP Manager
+cmip-man	163/udp		# CMIP/TCP Manager
+cmip-agent	164/tcp		# CMIP/TCP Agent
+smip-agent	164/udp		# CMIP/TCP Agent
+xns-courier	165/tcp		# Xerox
+xns-courier	165/udp		# Xerox
+s-net		166/tcp		# Sirius Systems
+s-net		166/udp		# Sirius Systems
+namp		167/tcp		# NAMP
+namp		167/udp		# NAMP
+rsvd		168/tcp		# RSVD
+rsvd		168/udp		# RSVD
+send		169/tcp		# SEND
+send		169/udp		# SEND
+print-srv	170/tcp		# Network PostScript
+print-srv	170/udp		# Network PostScript
+multiplex	171/tcp		# Network Innovations Multiplex
+multiplex	171/udp		# Network Innovations Multiplex
+cl/1		172/tcp		# Network Innovations CL/1
+cl/1		172/udp		# Network Innovations CL/1
+xyplex-mux	173/tcp		# Xyplex
+xyplex-mux	173/udp		# Xyplex
+mailq		174/tcp		# MAILQ
+mailq		174/udp		# MAILQ
+vmnet		175/tcp		# VMNET
+vmnet		175/udp		# VMNET
+genrad-mux	176/tcp		# GENRAD-MUX
+genrad-mux	176/udp		# GENRAD-MUX
+xdmcp		177/tcp		# X Display Manager Control Protocol
+xdmcp		177/udp		# X Display Manager Control Protocol
+nextstep	178/tcp		# NextStep Window Server
+NextStep	178/udp		# NextStep Window Server
+bgp		179/tcp		# Border Gateway Protocol
+bgp		179/udp		# Border Gateway Protocol
+ris		180/tcp		# Intergraph
+ris		180/udp		# Intergraph
+unify		181/tcp		# Unify
+unify		181/udp		# Unify
+audit		182/tcp		# Unisys Audit SITP
+audit		182/udp		# Unisys Audit SITP
+ocbinder	183/tcp		# OCBinder
+ocbinder	183/udp		# OCBinder
+ocserver	184/tcp		# OCServer
+ocserver	184/udp		# OCServer
+remote-kis	185/tcp		# Remote-KIS
+remote-kis	185/udp		# Remote-KIS
+kis		186/tcp		# KIS Protocol
+kis		186/udp		# KIS Protocol
+aci		187/tcp		# Application Communication Interface
+aci		187/udp		# Application Communication Interface
+mumps		188/tcp		# Plus Five's MUMPS
+mumps		188/udp		# Plus Five's MUMPS
+qft		189/tcp		# Queued File Transport
+qft		189/udp		# Queued File Transport
+gacp		190/tcp		# Gateway Access Control Protocol
+cacp		190/udp		# Gateway Access Control Protocol
+prospero	191/tcp		# Prospero Directory Service
+prospero	191/udp		# Prospero Directory Service
+osu-nms		192/tcp		# OSU Network Monitoring System
+osu-nms		192/udp		# OSU Network Monitoring System
+srmp		193/tcp		# Spider Remote Monitoring Protocol
+srmp		193/udp		# Spider Remote Monitoring Protocol
+irc		194/tcp		# Internet Relay Chat Protocol
+irc		194/udp		# Internet Relay Chat Protocol
+dn6-nlm-aud	195/tcp		# DNSIX Network Level Module Audit
+dn6-nlm-aud	195/udp		# DNSIX Network Level Module Audit
+dn6-smm-red	196/tcp		# DNSIX Session Mgt Module Audit Redir
+dn6-smm-red	196/udp		# DNSIX Session Mgt Module Audit Redir
+dls		197/tcp		# Directory Location Service
+dls		197/udp		# Directory Location Service
+dls-mon		198/tcp		# Directory Location Service Monitor
+dls-mon		198/udp		# Directory Location Service Monitor
+smux		199/tcp		# SMUX
+smux		199/udp		# SMUX
+src		200/tcp		# IBM System Resource Controller
+src		200/udp		# IBM System Resource Controller
+at-rtmp		201/tcp		# AppleTalk Routing Maintenance
+at-rtmp		201/udp		# AppleTalk Routing Maintenance
+at-nbp		202/tcp		# AppleTalk Name Binding
+at-nbp		202/udp		# AppleTalk Name Binding
+at-3		203/tcp		# AppleTalk Unused
+at-3		203/udp		# AppleTalk Unused
+at-echo		204/tcp		# AppleTalk Echo
+at-echo		204/udp		# AppleTalk Echo
+at-5		205/tcp		# AppleTalk Unused
+at-5		205/udp		# AppleTalk Unused
+at-zis		206/tcp		# AppleTalk Zone Information
+at-zis		206/udp		# AppleTalk Zone Information
+at-7		207/tcp		# AppleTalk Unused
+at-7		207/udp		# AppleTalk Unused
+at-8		208/tcp		# AppleTalk Unused
+at-8		208/udp		# AppleTalk Unused
+tam		209/tcp		# Trivial Authenticated Mail Protocol
+tam		209/udp		# Trivial Authenticated Mail Protocol
+z39.50		210/tcp		# ANSI Z39.50
+z39.50		210/udp		# ANSI Z39.50
+914c/g		211/tcp		# Texas Instruments 914C/G Terminal
+914c/g		211/udp		# Texas Instruments 914C/G Terminal
+anet		212/tcp		# ATEXSSTR
+anet		212/udp		# ATEXSSTR
+ipx		213/tcp		# IPX
+ipx		213/udp		# IPX
+vmpwscs		214/tcp		# VM PWSCS
+vmpwscs		214/udp		# VM PWSCS
+softpc		215/tcp		# Insignia Solutions
+softpc		215/udp		# Insignia Solutions
+atls		216/tcp		# Access Technology License Server
+atls		216/udp		# Access Technology License Server
+dbase		217/tcp		# dBASE Unix
+dbase		217/udp		# dBASE Unix
+mpp		218/tcp		# Netix Message Posting Protocol
+mpp		218/udp		# Netix Message Posting Protocol
+uarps		219/tcp		# Unisys ARPs
+uarps		219/udp		# Unisys ARPs
+imap3		220/tcp		# Interactive Mail Access Protocol v3
+imap3		220/udp		# Interactive Mail Access Protocol v3
+fln-spx		221/tcp		# Berkeley rlogind with SPX auth
+fln-spx		221/udp		# Berkeley rlogind with SPX auth
+rsh-spx		222/tcp		# Berkeley rshd with SPX auth
+rsh-spx		222/udp		# Berkeley rshd with SPX auth
+cdc		223/tcp		# Certificate Distribution Center
+cdc		223/udp		# Certificate Distribution Center
+sur-meas	243/tcp		# Survey Measurement
+sur-meas	243/udp		# Survey Measurement
+link		245/tcp		# LINK
+link		245/udp		# LINK
+dsp3270		246/tcp		# Display Systems Protocol
+dsp3270		246/udp		# Display Systems Protocol
+pdap		344/tcp		# Prospero Data Access Protocol
+pdap		344/udp		# Prospero Data Access Protocol
+pawserv		345/tcp		# Perf Analysis Workbench
+pawserv		345/udp		# Perf Analysis Workbench
+zserv		346/tcp		# Zebra server
+zserv		346/udp		# Zebra server
+fatserv		347/tcp		# Fatmen Server
+fatserv		347/udp		# Fatmen Server
+csi-sgwp	348/tcp		# Cabletron Management Protocol
+csi-sgwp	348/udp		# Cabletron Management Protocol
+clearcase	371/tcp		# Clearcase
+clearcase	371/udp		# Clearcase
+ulistserv	372/tcp		# Unix Listserv
+ulistserv	372/udp		# Unix Listserv
+legent-1	373/tcp		# Legent Corporation
+legent-1	373/udp		# Legent Corporation
+legent-2	374/tcp		# Legent Corporation
+legent-2	374/udp		# Legent Corporation
+hassle		375/tcp		# Hassle
+hassle		375/udp		# Hassle
+nip		376/tcp		# Amiga Envoy Network Inquiry Proto
+nip		376/udp		# Amiga Envoy Network Inquiry Proto
+tnETOS		377/tcp		# NEC Corporation
+tnETOS		377/udp		# NEC Corporation
+dsETOS		378/tcp		# NEC Corporation
+dsETOS		378/udp		# NEC Corporation
+is99c		379/tcp		# TIA/EIA/IS-99 modem client
+is99c		379/udp		# TIA/EIA/IS-99 modem client
+is99s		380/tcp		# TIA/EIA/IS-99 modem server
+is99s		380/udp		# TIA/EIA/IS-99 modem server
+hp-collector	381/tcp		# hp performance data collector
+hp-collector	381/udp		# hp performance data collector
+hp-managed-node	382/tcp		# hp performance data managed node
+hp-managed-node	382/udp		# hp performance data managed node
+hp-alarm-mgr	383/tcp		# hp performance data alarm manager
+hp-alarm-mgr	383/udp		# hp performance data alarm manager
+arns		384/tcp		# A Remote Network Server System
+arns		384/udp		# A Remote Network Server System
+ibm-app		385/tcp		# IBM Application
+ibm-app		385/tcp		# IBM Application
+asa		386/tcp		# ASA Message Router Object Def.
+asa		386/udp		# ASA Message Router Object Def.
+aurp		387/tcp		# Appletalk Update-Based Routing Pro.
+aurp		387/udp		# Appletalk Update-Based Routing Pro.
+unidata-ldm	388/tcp		# Unidata LDM Version 4
+unidata-ldm	388/udp		# Unidata LDM Version 4
+ldap		389/tcp		# Lightweight Directory Access Protocol
+ldap		389/udp		# Lightweight Directory Access Protocol
+uis		390/tcp		# UIS
+uis		390/udp		# UIS
+synotics-relay	391/tcp		# SynOptics SNMP Relay Port
+synotics-relay	391/udp		# SynOptics SNMP Relay Port
+synotics-broker	392/tcp		# SynOptics Port Broker Port
+synotics-broker	392/udp		# SynOptics Port Broker Port
+dis		393/tcp		# Data Interpretation System
+dis		393/udp		# Data Interpretation System
+embl-ndt	394/tcp		# EMBL Nucleic Data Transfer
+embl-ndt	394/udp		# EMBL Nucleic Data Transfer
+netcp		395/tcp		# NETscout Control Protocol
+netcp		395/udp		# NETscout Control Protocol
+netware-ip	396/tcp		# Novell Netware over IP
+netware-ip	396/udp		# Novell Netware over IP
+mptn		397/tcp		# Multi Protocol Trans. Net.
+mptn		397/udp		# Multi Protocol Trans. Net.
+kryptolan	398/tcp		# Kryptolan
+kryptolan	398/udp		# Kryptolan
+work-sol	400/tcp		# Workstation Solutions
+work-sol	400/udp		# Workstation Solutions
+ups		401/tcp		# Uninterruptible Power Supply
+ups		401/udp		# Uninterruptible Power Supply
+genie		402/tcp		# Genie Protocol
+genie		402/udp		# Genie Protocol
+decap		403/tcp		# decap
+decap		403/udp		# decap
+nced		404/tcp		# nced
+nced		404/udp		# nced
+ncld		405/tcp		# ncld
+ncld		405/udp		# ncld
+imsp		406/tcp		# Interactive Mail Support Protocol
+imsp		406/udp		# Interactive Mail Support Protocol
+timbuktu	407/tcp		# Timbuktu
+timbuktu	407/udp		# Timbuktu
+prm-sm		408/tcp		# Prospero Resource Manager Sys. Man.
+prm-sm		408/udp		# Prospero Resource Manager Sys. Man.
+prm-nm		409/tcp		# Prospero Resource Manager Node Man.
+prm-nm		409/udp		# Prospero Resource Manager Node Man.
+decladebug	410/tcp		# DECLadebug Remote Debug Protocol
+decladebug	410/udp		# DECLadebug Remote Debug Protocol
+rmt		411/tcp		# Remote MT Protocol
+rmt		411/udp		# Remote MT Protocol
+synoptics-trap	412/tcp		# Trap Convention Port
+synoptics-trap	412/udp		# Trap Convention Port
+smsp		413/tcp		# SMSP
+smsp		413/udp		# SMSP
+infoseek	414/tcp		# InfoSeek
+infoseek	414/udp		# InfoSeek
+bnet		415/tcp		# BNet
+bnet		415/udp		# BNet
+silverplatter	416/tcp		# Silverplatter
+silverplatter	416/udp		# Silverplatter
+onmux		417/tcp		# Onmux
+onmux		417/udp		# Onmux
+hyper-g		418/tcp		# Hyper-G
+hyper-g		418/udp		# Hyper-G
+ariel1		419/tcp		# Ariel
+ariel1		419/udp		# Ariel
+smpte		420/tcp		# SMPTE
+smpte		420/udp		# SMPTE
+ariel2		421/tcp		# Ariel
+ariel2		421/udp		# Ariel
+ariel3		422/tcp		# Ariel
+ariel3		422/udp		# Ariel
+opc-job-start	423/tcp		# IBM Operations Planning and Control Start
+opc-job-start	423/udp		# IBM Operations Planning and Control Start
+opc-job-track	424/tcp		# IBM Operations Planning and Control Track
+opc-job-track	424/udp		# IBM Operations Planning and Control Track
+icad-el		425/tcp		# ICAD
+icad-el		425/udp		# ICAD
+smartsdp	426/tcp		# smartsdp
+smartsdp	426/udp		# smartsdp
+svrloc		427/tcp		# Server Location
+svrloc		427/udp		# Server Location
+ocs_cmu		428/tcp		# OCS_CMU
+ocs_cmu		428/udp		# OCS_CMU
+ocs_amu		429/tcp		# OCS_AMU
+ocs_amu		429/udp		# OCS_AMU
+utmpsd		430/tcp		# UTMPSD
+utmpsd		430/udp		# UTMPSD
+utmpcd		431/tcp		# UTMPCD
+utmpcd		431/udp		# UTMPCD
+iasd		432/tcp		# IASD
+iasd		432/udp		# IASD
+nnsp		433/tcp		# NNSP
+nnsp		433/udp		# NNSP
+mobileip-agent	434/tcp		# MobileIP-Agent
+mobileip-agent	434/udp		# MobileIP-Agent
+mobilip-mn	435/tcp		# MobilIP-MN
+mobilip-mn	435/udp		# MobilIP-MN
+dna-cml		436/tcp		# DNA-CML
+dna-cml		436/udp		# DNA-CML
+comscm		437/tcp		# comscm
+comscm		437/udp		# comscm
+dsfgw		438/tcp		# dsfgw
+dsfgw		438/udp		# dsfgw
+dasp		439/tcp		# dasp Thomas Obermair
+dasp		439/udp		# dasp tommy@inlab.m.eunet.de
+sgcp		440/tcp		# sgcp
+sgcp		440/udp		# sgcp
+decvms-sysmgt	441/tcp		# decvms-sysmgt
+decvms-sysmgt	441/udp		# decvms-sysmgt
+cvc_hostd	442/tcp		# cvc_hostd
+cvc_hostd	442/udp		# cvc_hostd
+https		443/tcp		# https MCom
+https		443/udp		# https MCom
+snpp		444/tcp		# Simple Network Paging Protocol
+snpp		444/udp		# Simple Network Paging Protocol
+microsoft-ds	445/tcp		# Microsoft-DS
+microsoft-ds	445/udp		# Microsoft-DS
+ddm-rdb		446/tcp		# DDM-RDB
+ddm-rdb		446/udp		# DDM-RDB
+ddm-dfm		447/tcp		# DDM-RFM
+ddm-dfm		447/udp		# DDM-RFM
+ddm-byte	448/tcp		# DDM-BYTE
+ddm-byte	448/udp		# DDM-BYTE
+as-servermap	449/tcp		# AS Server Mapper
+as-servermap	449/udp		# AS Server Mapper
+tserver		450/tcp		# TServer
+tserver		450/udp		# TServer
+exec		512/tcp		# remote process execution;
+biff		512/udp		# used by mail system to notify users
+login		513/tcp		# remote login a la telnet;
+who		513/udp		# maintains data bases showing who's
+cmd		514/tcp		# like exec, but automatic
+syslog		514/udp
+printer		515/tcp		# spooler
+printer		515/udp		# spooler
+talk		517/tcp		# like tenex link, but across
+talk		517/udp		# like tenex link, but across tcp connection is established)
+ntalk		518/tcp
+ntalk		518/udp
+utime		519/tcp		# unixtime
+utime		519/udp		# unixtime
+efs		520/tcp		# extended file name server
+router		520/udp		# local routing process (on site);
+timed		525/tcp		# timeserver
+timed		525/udp		# timeserver
+tempo		526/tcp		# newdate
+tempo		526/udp		# newdate
+courier		530/tcp		# rpc
+courier		530/udp		# rpc
+conference	531/tcp		# chat
+conference	531/udp		# chat
+netnews		532/tcp		# readnews
+netnews		532/udp		# readnews
+netwall		533/tcp		# for emergency broadcasts
+netwall		533/udp		# for emergency broadcasts
+apertus-ldp	539/tcp		# Apertus Technologies Load Determination
+apertus-ldp	539/udp		# Apertus Technologies Load Determination
+uucp		540/tcp		# uucpd
+uucp		540/udp		# uucpd
+uucp-rlogin	541/tcp		# uucp-rlogin Stuart Lynne
+uucp-rlogin	541/udp		# uucp-rlogin sl@wimsey.com
+klogin		543/tcp
+klogin		543/udp
+kshell		544/tcp		# krcmd
+kshell		544/udp		# krcmd
+new-rwho	550/tcp		# new-who
+new-rwho	550/udp		# new-who
+dsf		555/tcp
+dsf		555/udp
+remotefs	556/tcp		# rfs server
+remotefs	556/udp		# rfs server
+rmonitor	560/tcp		# rmonitord
+rmonitor	560/udp		# rmonitord
+monitor		561/tcp
+monitor		561/udp
+chshell		562/tcp		# chcmd
+chshell		562/udp		# chcmd
+9pfs		564/tcp		# plan 9 file service
+9pfs		564/udp		# plan 9 file service
+whoami		565/tcp		# whoami
+whoami		565/udp		# whoami
+meter		570/tcp		# demon
+meter		570/udp		# demon
+meter		571/tcp		# udemon
+meter		571/udp		# udemon
+ipcserver	600/tcp		# Sun IPC server
+ipcserver	600/udp		# Sun IPC server
+nqs		607/tcp		# nqs
+nqs		607/udp		# nqs
+urm		606/tcp		# Cray Unified Resource Manager
+urm		606/udp		# Cray Unified Resource Manager
+sift-uft	608/tcp		# Sender-Initiated/Unsolicited File Transfer
+sift-uft	608/udp		# Sender-Initiated/Unsolicited File Transfer
+npmp-trap	609/tcp		# npmp-trap
+npmp-trap	609/udp		# npmp-trap
+npmp-local	610/tcp		# npmp-local
+npmp-local	610/udp		# npmp-local
+npmp-gui	611/tcp		# npmp-gui
+npmp-gui	611/udp		# npmp-gui
+ginad		634/tcp		# ginad
+ginad		634/udp		# ginad
+mdqs		666/tcp
+mdqs		666/udp
+doom		666/tcp		# doom Id Software
+doom		666/tcp		# doom Id Software
+elcsd		704/tcp		# errlog copy/server daemon
+elcsd		704/udp		# errlog copy/server daemon
+entrustmanager	709/tcp		# EntrustManager
+entrustmanager	709/udp		# EntrustManager
+netviewdm1	729/tcp		# IBM NetView DM/6000 Server/Client
+netviewdm1	729/udp		# IBM NetView DM/6000 Server/Client
+netviewdm2	730/tcp		# IBM NetView DM/6000 send/tcp
+netviewdm2	730/udp		# IBM NetView DM/6000 send/tcp
+netviewdm3	731/tcp		# IBM NetView DM/6000 receive/tcp
+netviewdm3	731/udp		# IBM NetView DM/6000 receive/tcp
+netgw		741/tcp		# netGW
+netgw		741/udp		# netGW
+netrcs		742/tcp		# Network based Rev. Cont. Sys.
+netrcs		742/udp		# Network based Rev. Cont. Sys.
+flexlm		744/tcp		# Flexible License Manager
+flexlm		744/udp		# Flexible License Manager
+fujitsu-dev	747/tcp		# Fujitsu Device Control
+fujitsu-dev	747/udp		# Fujitsu Device Control
+ris-cm		748/tcp		# Russell Info Sci Calendar Manager
+ris-cm		748/udp		# Russell Info Sci Calendar Manager
+kerberos-adm	749/tcp		# kerberos administration
+kerberos-adm	749/udp		# kerberos administration
+rfile		750/tcp
+loadav		750/udp
+pump		751/tcp
+pump		751/udp
+qrh		752/tcp
+qrh		752/udp
+rrh		753/tcp
+rrh		753/udp
+tell		754/tcp		# send
+tell		754/udp		# send
+nlogin		758/tcp
+nlogin		758/udp
+con		759/tcp
+con		759/udp
+ns		760/tcp
+ns		760/udp
+rxe		761/tcp
+rxe		761/udp
+quotad		762/tcp
+quotad		762/udp
+cycleserv	763/tcp
+cycleserv	763/udp
+omserv		764/tcp
+omserv		764/udp
+webster		765/tcp
+webster		765/udp
+phonebook	767/tcp		# phone
+phonebook	767/udp		# phone
+vid		769/tcp
+vid		769/udp
+cadlock		770/tcp
+cadlock		770/udp
+rtip		771/tcp
+rtip		771/udp
+cycleserv2	772/tcp
+cycleserv2	772/udp
+submit		773/tcp
+notify		773/udp
+rpasswd		774/tcp
+acmaint_dbd	774/udp
+entomb		775/tcp
+acmaint_transd	775/udp
+wpages		776/tcp
+wpages		776/udp
+wpgs		780/tcp
+wpgs		780/udp
+concert		786/tcp		# Concert
+concert		786/udp		# Concert
+mdbs_daemon	800/tcp
+mdbs_daemon	800/udp
+device		801/tcp
+device		801/udp
+xtreelic	996/tcp		# Central Point Software
+xtreelic	996/udp		# Central Point Software
+maitrd		997/tcp
+maitrd		997/udp
+busboy		998/tcp
+puparp		998/udp
+garcon		999/tcp
+applix		999/udp		# Applix ac
+puprouter	999/tcp
+puprouter	999/udp
+cadlock		1000/tcp
+ock		1000/udp
diff --git a/contrib/ipfilter/fil.c b/contrib/ipfilter/fil.c
new file mode 100644
index 0000000..de776f9
--- /dev/null
+++ b/contrib/ipfilter/fil.c
@@ -0,0 +1,762 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)fil.c	1.36 6/5/96 (C) 1993-1996 Darren Reed";
+static	char	rcsid[] = "$Id: fil.c,v 2.0.1.4 1997/02/04 13:59:41 darrenr Exp $";
+#endif
+
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#if defined(_KERNEL) || defined(KERNEL)
+# include <sys/systm.h>
+#else
+# include <stdio.h>
+# include <string.h>
+#endif
+#include <sys/uio.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+# include <sys/mbuf.h>
+#else
+# include <sys/byteorder.h>
+# include <sys/dditypes.h>
+# include <sys/stream.h>
+#endif
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#ifdef sun
+# include <net/af.h>
+#endif
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_nat.h"
+#include "ip_frag.h"
+#include "ip_state.h"
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+#ifndef	_KERNEL
+#include "ipf.h"
+extern	int	opts;
+extern	void	debug(), verbose();
+
+#define	FR_IFVERBOSE(ex,second,verb_pr)	if (ex) { verbose verb_pr; second; }
+#define	FR_IFDEBUG(ex,second,verb_pr)	if (ex) { debug verb_pr; second; }
+#define	FR_VERBOSE(verb_pr)	verbose verb_pr
+#define	FR_DEBUG(verb_pr)	debug verb_pr
+#define	FR_SCANLIST(p, ip, fi, m)	fr_scanlist(p, ip, fi)
+# if SOLARIS
+#  define	bcmp	memcmp
+# endif
+#else
+#define	FR_IFVERBOSE(ex,second,verb_pr)	;
+#define	FR_IFDEBUG(ex,second,verb_pr)	;
+#define	FR_VERBOSE(verb_pr)
+#define	FR_DEBUG(verb_pr)
+#define	FR_SCANLIST(p, ip, fi, m)	fr_scanlist(p, ip, fi, m)
+extern	int	send_reset();
+# if SOLARIS
+extern	int	icmp_error(), ipfr_fastroute();
+extern	kmutex_t	ipf_mutex, ipl_mutex;
+# else
+extern	void	ipfr_fastroute();
+# endif
+extern	int	ipl_unreach, ipllog();
+#endif
+
+#if SOLARIS
+# define	SEND_RESET(ip, if, q)		send_reset(ip, qif, q)
+# define	ICMP_ERROR(b, ip, t, c, if, src) \
+			icmp_error(b, ip, t, c, if, src)
+#else
+# define	SEND_RESET(ip, if, q)		send_reset(ip)
+# if BSD < 199103
+#  define	ICMP_ERROR(b, ip, t, c, if, src) \
+			icmp_error(mtod(b, ip_t *), t, c, if, src)
+# else
+#  define	ICMP_ERROR(b, ip, t, c, if, src) \
+			icmp_error(b, t, c, (src).s_addr, if)
+# endif
+#endif
+
+struct	filterstats frstats[2] = {{0,0,0,0,0},{0,0,0,0,0}};
+struct	frentry	*ipfilter[2][2] = { { NULL, NULL }, { NULL, NULL } },
+		*ipacct[2][2] = { { NULL, NULL }, { NULL, NULL } };
+int	fr_flags = 0, fr_active = 0;
+
+fr_info_t	frcache[2];
+
+
+/*
+ * bit values for identifying presence of individual IP options
+ */
+struct	optlist	ipopts[20] = {
+	{ IPOPT_NOP,	0x000001 },
+	{ IPOPT_RR,	0x000002 },
+	{ IPOPT_ZSU,	0x000004 },
+	{ IPOPT_MTUP,	0x000008 },
+	{ IPOPT_MTUR,	0x000010 },
+	{ IPOPT_ENCODE,	0x000020 },
+	{ IPOPT_TS,	0x000040 },
+	{ IPOPT_TR,	0x000080 },
+	{ IPOPT_SECURITY, 0x000100 },
+	{ IPOPT_LSRR,	0x000200 },
+	{ IPOPT_E_SEC,	0x000400 },
+	{ IPOPT_CIPSO,	0x000800 },
+	{ IPOPT_SATID,	0x001000 },
+	{ IPOPT_SSRR,	0x002000 },
+	{ IPOPT_ADDEXT,	0x004000 },
+	{ IPOPT_VISA,	0x008000 },
+	{ IPOPT_IMITD,	0x010000 },
+	{ IPOPT_EIP,	0x020000 },
+	{ IPOPT_FINN,	0x040000 },
+	{ 0,		0x000000 }
+};
+
+/*
+ * bit values for identifying presence of individual IP security options
+ */
+struct	optlist	secopt[8] = {
+	{ IPSO_CLASS_RES4,	0x01 },
+	{ IPSO_CLASS_TOPS,	0x02 },
+	{ IPSO_CLASS_SECR,	0x04 },
+	{ IPSO_CLASS_RES3,	0x08 },
+	{ IPSO_CLASS_CONF,	0x10 },
+	{ IPSO_CLASS_UNCL,	0x20 },
+	{ IPSO_CLASS_RES2,	0x40 },
+	{ IPSO_CLASS_RES1,	0x80 }
+};
+
+
+/*
+ * compact the IP header into a structure which contains just the info.
+ * which is useful for comparing IP headers with.
+ */
+void	fr_makefrip(hlen, ip, fin)
+int hlen;
+ip_t *ip;
+fr_info_t *fin;
+{
+	struct optlist *op;
+	tcphdr_t *tcp;
+	fr_ip_t *fi = &fin->fin_fi;
+	u_short optmsk = 0, secmsk = 0, auth = 0;
+	int i, mv, ol, off;
+	u_char *s, opt;
+
+	fin->fin_fr = NULL;
+	fin->fin_tcpf = 0;
+	fin->fin_data[0] = 0;
+	fin->fin_data[1] = 0;
+	fin->fin_rule = -1;
+#ifdef	_KERNEL
+	fin->fin_icode = ipl_unreach;
+#endif
+	fi->fi_v = ip->ip_v;
+	fi->fi_tos = ip->ip_tos;
+	fin->fin_hlen = hlen;
+	fin->fin_dlen = ip->ip_len - hlen;
+	tcp = (tcphdr_t *)((char *)ip + hlen);
+	fin->fin_dp = (void *)tcp;
+	(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
+	(*(((u_long *)fi) + 1)) = (*(((u_long *)ip) + 3));
+	(*(((u_long *)fi) + 2)) = (*(((u_long *)ip) + 4));
+
+	fi->fi_fl = (hlen > sizeof(struct ip)) ? FI_OPTIONS : 0;
+	off = (ip->ip_off & 0x1fff) << 3;
+	if (ip->ip_off & 0x3fff)
+		fi->fi_fl |= FI_FRAG;
+	switch (ip->ip_p)
+	{
+	case IPPROTO_ICMP :
+		if ((!IPMINLEN(ip, icmp) && !off) ||
+		    (off && off < sizeof(struct icmp)))
+			fi->fi_fl |= FI_SHORT;
+		if (fin->fin_dlen > 1)
+			fin->fin_data[0] = *(u_short *)tcp;
+		break;
+	case IPPROTO_TCP :
+		fi->fi_fl |= FI_TCPUDP;
+		if ((!IPMINLEN(ip, tcphdr) && !off) ||
+		    (off && off < sizeof(struct tcphdr)))
+			fi->fi_fl |= FI_SHORT;
+		if (!(fi->fi_fl & FI_SHORT) && !off)
+			fin->fin_tcpf = tcp->th_flags;
+		goto getports;
+	case IPPROTO_UDP :
+		fi->fi_fl |= FI_TCPUDP;
+		if ((!IPMINLEN(ip, udphdr) && !off) ||
+		    (off && off < sizeof(struct udphdr)))
+			fi->fi_fl |= FI_SHORT;
+getports:
+		if (!off && (fin->fin_dlen > 3)) {
+			fin->fin_data[0] = ntohs(tcp->th_sport);
+			fin->fin_data[1] = ntohs(tcp->th_dport);
+		}
+		break;
+	default :
+		break;
+	}
+
+
+	for (s = (u_char *)(ip + 1), hlen -= sizeof(*ip); hlen; ) {
+		if (!(opt = *s))
+			break;
+		ol = (opt == IPOPT_NOP) ? 1 : (int)*(s+1);
+		if (opt > 1 && (ol < 2 || ol > hlen))
+			break;
+		for (i = 9, mv = 4; mv >= 0; ) {
+			op = ipopts + i;
+			if (opt == (u_char)op->ol_val) {
+				optmsk |= op->ol_bit;
+				if (opt == IPOPT_SECURITY) {
+					struct optlist *sp;
+					u_char	sec;
+					int j, m;
+
+					sec = *(s + 2);	/* classification */
+					for (j = 3, m = 2; m >= 0; ) {
+						sp = secopt + j;
+						if (sec == sp->ol_val) {
+							secmsk |= sp->ol_bit;
+							auth = *(s + 3);
+							auth *= 256;
+							auth += *(s + 4);
+							break;
+						}
+						if (sec < sp->ol_val)
+							j -= m--;
+						else
+							j += m--;
+					}
+				}
+				break;
+			}
+			if (opt < op->ol_val)
+				i -= mv--;
+			else
+				i += mv--;
+		}
+		hlen -= ol;
+		s += ol;
+	}
+	if (auth && !(auth & 0x0100))
+		auth &= 0xff00;
+	fi->fi_optmsk = optmsk;
+	fi->fi_secmsk = secmsk;
+	fi->fi_auth = auth;
+}
+
+
+/*
+ * check an IP packet for TCP/UDP characteristics such as ports and flags.
+ */
+int fr_tcpudpchk(fr, fin)
+frentry_t *fr;
+fr_info_t *fin;
+{
+	register u_short po, tup;
+	register char i;
+	register int err = 1;
+
+	/*
+	 * Both ports should *always* be in the first fragment.
+	 * So far, I cannot find any cases where they can not be.
+	 *
+	 * compare destination ports
+	 */
+	if ((i = (int)fr->fr_dcmp)) {
+		po = fr->fr_dport;
+		tup = fin->fin_data[1];
+		/*
+		 * Do opposite test to that required and
+		 * continue if that succeeds.
+		 */
+		if (!--i && tup != po) /* EQUAL */
+			err = 0;
+		else if (!--i && tup == po) /* NOTEQUAL */
+			err = 0;
+		else if (!--i && tup >= po) /* LESSTHAN */
+			err = 0;
+		else if (!--i && tup <= po) /* GREATERTHAN */
+			err = 0;
+		else if (!--i && tup > po) /* LT or EQ */
+			err = 0;
+		else if (!--i && tup < po) /* GT or EQ */
+			err = 0;
+		else if (!--i &&	   /* Out of range */
+			 (tup >= po && tup <= fr->fr_dtop))
+			err = 0;
+		else if (!--i &&	   /* In range */
+			 (tup <= po || tup >= fr->fr_dtop))
+			err = 0;
+	}
+	/*
+	 * compare source ports
+	 */
+	if (err && (i = (int)fr->fr_scmp)) {
+		po = fr->fr_sport;
+		tup = fin->fin_data[0];
+		if (!--i && tup != po)
+			err = 0;
+		else if (!--i && tup == po)
+			err = 0;
+		else if (!--i && tup >= po)
+			err = 0;
+		else if (!--i && tup <= po)
+			err = 0;
+		else if (!--i && tup > po)
+			err = 0;
+		else if (!--i && tup < po)
+			err = 0;
+		else if (!--i &&	   /* Out of range */
+			 (tup >= po && tup <= fr->fr_stop))
+			err = 0;
+		else if (!--i &&	   /* In range */
+			 (tup <= po || tup >= fr->fr_stop))
+			err = 0;
+	}
+
+	/*
+	 * If we don't have all the TCP/UDP header, then how can we
+	 * expect to do any sort of match on it ?  If we were looking for
+	 * TCP flags, then NO match.  If not, then match (which should
+	 * satisfy the "short" class too).
+	 */
+	if (err && (fin->fin_fi.fi_p == IPPROTO_TCP)) {
+		if (fin->fin_fi.fi_fl & FI_SHORT)
+			return !(fr->fr_tcpf | fr->fr_tcpfm);
+		/*
+		 * Match the flags ?  If not, abort this match.
+		 */
+		if (fr->fr_tcpf &&
+		    fr->fr_tcpf != (fin->fin_tcpf & fr->fr_tcpfm)) {
+			FR_DEBUG(("f. %#x & %#x != %#x\n", fin->fin_tcpf,
+				 fr->fr_tcpfm, fr->fr_tcpf));
+			err = 0;
+		}
+	}
+	return err;
+}
+
+/*
+ * Check the input/output list of rules for a match and result.
+ * Could be per interface, but this gets real nasty when you don't have
+ * kernel sauce.
+ */
+int fr_scanlist(pass, ip, fin, m)
+int pass;
+ip_t *ip;
+register fr_info_t *fin;
+void *m;
+{
+	register struct frentry *fr;
+	register fr_ip_t *fi = &fin->fin_fi;
+	int rulen, portcmp = 0, off;
+
+	fr = fin->fin_fr;
+	fin->fin_fr = NULL;
+	fin->fin_rule = 0;
+	off = ip->ip_off & 0x1fff;
+	pass |= (fi->fi_fl << 20);
+
+	if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
+		portcmp = 1;
+
+	for (rulen = 0; fr; fr = fr->fr_next, rulen++) {
+		/*
+		 * In all checks below, a null (zero) value in the
+		 * filter struture is taken to mean a wildcard.
+		 *
+		 * check that we are working for the right interface
+		 */
+#ifdef	_KERNEL
+		if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)
+			continue;
+#else
+		if (opts & (OPT_VERBOSE|OPT_DEBUG))
+			printf("\n");
+		FR_VERBOSE(("%c", (pass & FR_PASS) ? 'p' : 'b'));
+		if (fin->fin_ifp && *fr->fr_ifname &&
+		    strcasecmp((char *)fin->fin_ifp, fr->fr_ifname))
+			continue;
+		FR_VERBOSE((":i"));
+#endif
+		{
+			register u_long	*ld, *lm, *lip;
+			register int i;
+
+			lip = (u_long *)fi;
+			lm = (u_long *)&fr->fr_mip;
+			ld = (u_long *)&fr->fr_ip;
+			i = ((lip[0] & lm[0]) != ld[0]);
+			FR_IFDEBUG(i,continue,("0. %#08x & %#08x != %#08x\n",
+				   lip[0], lm[0], ld[0]));
+			i |= ((lip[1] & lm[1]) != ld[1]);
+			FR_IFDEBUG(i,continue,("1. %#08x & %#08x != %#08x\n",
+				   lip[1], lm[1], ld[1]));
+			i |= ((lip[2] & lm[2]) != ld[2]);
+			FR_IFDEBUG(i,continue,("2. %#08x & %#08x != %#08x\n",
+				   lip[2], lm[2], ld[2]));
+			i |= ((lip[3] & lm[3]) != ld[3]);
+			FR_IFDEBUG(i,continue,("3. %#08x & %#08x != %#08x\n",
+				   lip[3], lm[3], ld[3]));
+			i |= ((lip[4] & lm[4]) != ld[4]);
+			FR_IFDEBUG(i,continue,("4. %#08x & %#08x != %#08x\n",
+				   lip[4], lm[4], ld[4]));
+			if (i)
+				continue;
+		}
+
+		/*
+		 * If a fragment, then only the first has what we're looking
+		 * for here...
+		 */
+		if (fi->fi_fl & FI_TCPUDP) {
+			if (portcmp) {
+				if (!fr_tcpudpchk(fr, fin))
+					continue;
+			} else if (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf ||
+				   fr->fr_tcpfm)
+				continue;
+		} else if (fi->fi_p == IPPROTO_ICMP) {
+			if (!off && (fin->fin_dlen > 1)) {
+				if ((fin->fin_data[0] & fr->fr_icmpm) !=
+				    fr->fr_icmp) {
+					FR_DEBUG(("i. %#x & %#x != %#x\n",
+						 fin->fin_data[0],
+						 fr->fr_icmpm, fr->fr_icmp));
+					continue;
+				}
+			} else if (fr->fr_icmpm || fr->fr_icmp)
+				continue;
+		}
+		FR_VERBOSE(("*"));
+		/*
+		 * Just log this packet...
+		 */
+		pass = fr->fr_flags;
+		if ((pass & FR_CALLNOW) && fr->fr_func)
+			pass = (*fr->fr_func)(pass, ip, fin);
+#ifdef  IPFILTER_LOG
+		if ((pass & FR_LOGMASK) == FR_LOG) {
+			if (!ipllog(fr->fr_flags, ip, fin, m))
+				frstats[fin->fin_out].fr_skip++;
+			frstats[fin->fin_out].fr_pkl++;
+		}
+#endif /* IPFILTER_LOG */
+		FR_DEBUG(("pass %#x\n", pass));
+		fr->fr_hits++;
+		if (pass & FR_ACCOUNT)
+			fr->fr_bytes += ip->ip_len;
+		else
+			fin->fin_icode = fr->fr_icode;
+		fin->fin_rule = rulen;
+		fin->fin_fr = fr;
+		if (pass & FR_QUICK)
+			break;
+	}
+	return pass;
+}
+
+
+/*
+ * frcheck - filter check
+ * check using source and destination addresses/pors in a packet whether
+ * or not to pass it on or not.
+ */
+int fr_check(ip, hlen, ifp, out
+#ifdef _KERNEL
+# if SOLARIS
+, qif, q, mp)
+qif_t *qif;
+queue_t *q;
+mblk_t **mp;
+# else
+, mp)
+struct mbuf **mp;
+# endif
+#else
+)
+#endif
+ip_t *ip;
+int hlen;
+struct ifnet *ifp;
+int out;
+{
+	/*
+	 * The above really sucks, but short of writing a diff
+	 */
+	fr_info_t frinfo, *fc;
+	register fr_info_t *fin = &frinfo;
+	frentry_t *fr = NULL;
+	int pass, changed;
+
+#if !defined(__SVR4) && !defined(__svr4__) && defined(_KERNEL)
+	register struct mbuf *m = *mp;
+	struct mbuf *mc = NULL;
+
+	if ((ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP ||
+	     ip->ip_p == IPPROTO_ICMP)) {
+		register int up = MIN(hlen + 8, ip->ip_len);
+
+		if (up > m->m_len) {
+			if ((*mp = m_pullup(m, up)) == 0) {
+				frstats[out].fr_pull[1]++;
+				return -1;
+			} else {
+				frstats[out].fr_pull[0]++;
+				m = *mp;
+				ip = mtod(m, struct ip *);
+			}
+		}
+	}
+#endif
+#if SOLARIS && defined(_KERNEL)
+	mblk_t *mc = NULL, *m = qif->qf_m;
+#endif
+	fr_makefrip(hlen, ip, fin);
+	fin->fin_ifp = ifp;
+	fin->fin_out = out;
+
+	MUTEX_ENTER(&ipf_mutex);
+	if (!out) {
+		changed = ip_natin(ip, hlen, fin);
+		if ((fin->fin_fr = ipacct[0][fr_active]) &&
+		    (FR_SCANLIST(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT))
+			frstats[0].fr_acct++;
+	}
+
+	if ((pass = ipfr_knownfrag(ip, fin))) {
+		if ((pass & FR_KEEPSTATE)) {
+			if (fr_addstate(ip, fin, pass) == -1)
+				frstats[out].fr_bads++;
+			else
+				frstats[out].fr_ads++;
+		}
+	} else if ((pass = fr_checkstate(ip, fin))) {
+		if ((pass & FR_KEEPFRAG)) {
+			if (fin->fin_fi.fi_fl & FI_FRAG) {
+				if (ipfr_newfrag(ip, fin, pass) == -1)
+					frstats[out].fr_bnfr++;
+				else
+					frstats[out].fr_nfr++;
+			} else
+				frstats[out].fr_cfr++;
+		}
+	} else {
+		fc = frcache + out;
+		if (fc->fin_fr && !bcmp((char *)fin, (char *)fc, FI_CSIZE)) {
+			/*
+			 * copy cached data so we can unlock the mutex
+			 * earlier.
+			 */
+			bcopy((char *)fc, (char *)fin, sizeof(*fin));
+			frstats[out].fr_chit++;
+			pass = fin->fin_fr->fr_flags;
+		} else {
+			pass = FR_NOMATCH;
+			if ((fin->fin_fr = ipfilter[out][fr_active]))
+				pass = FR_SCANLIST(FR_NOMATCH, ip, fin, m);
+			bcopy((char *)fin, (char *)fc, FI_CSIZE);
+			if (pass & FR_NOMATCH) {
+				frstats[out].fr_nom++;
+#ifdef	NOMATCH
+				pass |= NOMATCH;
+#endif
+			}
+		}
+		fr = fin->fin_fr;
+
+		if ((pass & FR_KEEPFRAG)) {
+			if (fin->fin_fi.fi_fl & FI_FRAG) {
+				if (ipfr_newfrag(ip, fin, pass) == -1)
+					frstats[out].fr_bnfr++;
+				else
+					frstats[out].fr_nfr++;
+			} else
+				frstats[out].fr_cfr++;
+		}
+		if (pass & FR_KEEPSTATE) {
+			if (fr_addstate(ip, fin, pass) == -1)
+				frstats[out].fr_bads++;
+			else
+				frstats[out].fr_ads++;
+		}
+	}
+
+	if (fr && fr->fr_func)
+		pass = (*fr->fr_func)(pass, ip, fin);
+
+	if (out) {
+		if ((fin->fin_fr = ipacct[1][fr_active]) &&
+		    (FR_SCANLIST(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT))
+			frstats[1].fr_acct++;
+		fin->fin_fr = NULL;
+		changed = ip_natout(ip, hlen, fin);
+	}
+	fin->fin_fr = fr;
+	MUTEX_EXIT(&ipf_mutex);
+
+#ifdef	IPFILTER_LOG
+	if ((fr_flags & FF_LOGGING) || (pass & FR_LOGMASK)) {
+		if ((fr_flags & FF_LOGNOMATCH) && (pass & FR_NOMATCH)) {
+			pass |= FF_LOGNOMATCH;
+			frstats[out].fr_npkl++;
+			goto logit;
+		} else if (((pass & FR_LOGMASK) == FR_LOGP) ||
+		    ((pass & FR_PASS) && (fr_flags & FF_LOGPASS))) {
+			if ((pass & FR_LOGMASK) != FR_LOGP)
+				pass |= FF_LOGPASS;
+			frstats[out].fr_ppkl++;
+			goto logit;
+		} else if (((pass & FR_LOGMASK) == FR_LOGB) ||
+			   ((pass & FR_BLOCK) && (fr_flags & FF_LOGBLOCK))) {
+			if ((pass & FR_LOGMASK) != FR_LOGB)
+				pass |= FF_LOGBLOCK;
+			frstats[out].fr_bpkl++;
+logit:
+			if (!ipllog(pass, ip, fin, m)) {
+				frstats[out].fr_skip++;
+				if ((pass & (FR_PASS|FR_LOGORBLOCK)) ==
+				    (FR_PASS|FR_LOGORBLOCK))
+					pass ^= FR_PASS|FR_BLOCK;
+			}
+		}
+	}
+#endif /* IPFILTER_LOG */
+
+	if (pass & FR_PASS)
+		frstats[out].fr_pass++;
+	else if (pass & FR_BLOCK) {
+		frstats[out].fr_block++;
+		/*
+		 * Should we return an ICMP packet to indicate error
+		 * status passing through the packet filter ?
+		 */
+#ifdef	_KERNEL
+		if (pass & FR_RETICMP) {
+# if SOLARIS
+			ICMP_ERROR(q, ip, ICMP_UNREACH, fin->fin_icode,
+				   qif, ip->ip_src);
+# else
+			ICMP_ERROR(m, ip, ICMP_UNREACH, fin->fin_icode,
+				   ifp, ip->ip_src);
+			m = NULL;	/* freed by icmp_error() */
+# endif
+
+			frstats[0].fr_ret++;
+		} else if ((pass & FR_RETRST) &&
+			   !(fin->fin_fi.fi_fl & FI_SHORT)) {
+			if (SEND_RESET(ip, qif, q) == 0)
+				frstats[1].fr_ret++;
+		}
+#else
+		if (pass & FR_RETICMP) {
+			verbose("- ICMP unreachable sent\n");
+			frstats[0].fr_ret++;
+		} else if ((pass & FR_RETRST) &&
+			   !(fin->fin_fi.fi_fl & FI_SHORT)) {
+			verbose("- TCP RST sent\n");
+			frstats[1].fr_ret++;
+		}
+#endif
+	}
+#ifdef	_KERNEL
+# if	!SOLARIS
+	if (pass & FR_DUP)
+		mc = m_copy(m, 0, M_COPYALL);
+	if (fr) {
+		frdest_t *fdp = &fr->fr_tif;
+
+		if ((pass & FR_FASTROUTE) ||
+		    (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
+			ipfr_fastroute(m, fin, fdp);
+			m = *mp = NULL;
+			pass = 0;
+		}
+		if (mc)
+			ipfr_fastroute(mc, fin, &fr->fr_dif);
+	}
+	if (!(pass & FR_PASS) && m)
+		m_freem(m);
+	return (pass & FR_PASS) ? 0 : -1;
+# else
+	if (pass & FR_DUP)
+		mc = dupmsg(m);
+	if (fr) {
+		frdest_t *fdp = &fr->fr_tif;
+
+		if ((pass & FR_FASTROUTE) ||
+		    (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
+			ipfr_fastroute(qif, ip, m, mp, fin, fdp);
+			m = *mp = NULL;
+		}
+		if (mc)
+			ipfr_fastroute(qif, ip, mc, mp, fin, &fr->fr_dif);
+	}
+	return (pass & FR_PASS) ? changed : -1;
+# endif
+#else
+	if (pass & FR_NOMATCH)
+		return 1;
+	if (pass & FR_PASS)
+		return 0;
+	return -1;
+#endif
+}
+
+
+#ifdef	IPFILTER_LOG
+# if !(defined(_KERNEL))
+static void ipllog()
+{
+	verbose("l");
+}
+# endif
+
+
+int fr_copytolog(buf, len)
+char *buf;
+int len;
+{
+	int	clen, tail;
+
+	tail = (iplh >= iplt) ? (iplbuf + IPLLOGSIZE - iplh) : (iplt - iplh);
+	clen = MIN(tail, len);
+	bcopy(buf, iplh, clen);
+	len -= clen;
+	tail -= clen;
+	iplh += clen;
+	buf += clen;
+	if (iplh == iplbuf + IPLLOGSIZE) {
+		iplh = iplbuf;
+		tail = iplt - iplh;
+	}
+	if (len && tail) {
+		clen = MIN(tail, len);
+		bcopy(buf, iplh, clen);
+		len -= clen;
+		iplh += clen;
+	}
+	return len;
+}
+#endif
diff --git a/contrib/ipfilter/fils.c b/contrib/ipfilter/fils.c
new file mode 100644
index 0000000..249611b
--- /dev/null
+++ b/contrib/ipfilter/fils.c
@@ -0,0 +1,366 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <nlist.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <net/if.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_nat.h"
+#include "ip_frag.h"
+#include "ip_state.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include "ipf.h"
+#include "kmem.h"
+#ifdef	__NetBSD__
+#include <paths.h>
+#endif
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)fils.c	1.21 4/20/96 (C) 1993-1996 Darren Reed";
+static	char	rcsid[] = "$Id: fils.c,v 2.0.1.2 1997/01/30 10:21:48 darrenr Exp $";
+#endif
+#ifdef	_PATH_UNIX
+#define	VMUNIX	_PATH_UNIX
+#else
+#define	VMUNIX	"/vmunix"
+#endif
+
+extern	char	*optarg;
+
+#define	PRINTF	(void)printf
+#define	FPRINTF	(void)fprintf
+#define	F_IN	0
+#define	F_OUT	1
+#define	F_AC	2
+static	char	*filters[4] = { "ipfilter(in)", "ipfilter(out)",
+				"ipacct(in)", "ipacct(out)" };
+
+int	opts = 0;
+
+static	void	showstats(), showfrstates();
+static	void	showlist(), showipstates();
+
+void Usage(name)
+char *name;
+{
+	fprintf(stderr, "Usage: %s [-afhIiosv] [-d <device>]\n", name);
+	exit(1);
+}
+
+
+int main(argc,argv)
+int argc;
+char *argv[];
+{
+	friostat_t fio;
+	ips_stat_t ipsst;
+	ipfrstat_t ifrst;
+	char	c, *name = NULL, *device = IPL_NAME;
+	int	fd;
+
+	if (openkmem() == -1)
+		exit(-1);
+
+	(void)setuid(getuid());
+	(void)setgid(getgid());
+
+	while ((c = getopt(argc, argv, "afhIiosvd:")) != -1)
+	{
+		switch (c)
+		{
+		case 'a' :
+			opts |= OPT_ACCNT|OPT_SHOWLIST;
+			break;
+		case 'd' :
+			device = optarg;
+			break;
+		case 'f' :
+			opts |= OPT_FRSTATES;
+			break;
+		case 'h' :
+			opts |= OPT_HITS;
+			break;
+		case 'i' :
+			opts |= OPT_INQUE|OPT_SHOWLIST;
+			break;
+		case 'n' :
+			opts |= OPT_SHOWLINENO;
+			break;
+		case 'I' :
+			opts |= OPT_INACTIVE;
+			break;
+		case 'o' :
+			opts |= OPT_OUTQUE|OPT_SHOWLIST;
+			break;
+		case 's' :
+			opts |= OPT_IPSTATES;
+			break;
+		case 'v' :
+			opts |= OPT_VERBOSE;
+			break;
+		default :
+			Usage(argv[0]);
+			break;
+		}
+	}
+
+	if ((fd = open(device, O_RDONLY)) < 0) {
+		perror("open");
+		exit(-1);
+	}
+
+	bzero((char *)&fio, sizeof(fio));
+	bzero((char *)&ipsst, sizeof(ipsst));
+	bzero((char *)&ifrst, sizeof(ifrst));
+
+	if (ioctl(fd, SIOCGETFS, &fio) == -1) {
+		perror("ioctl(SIOCGETFS)");
+		exit(-1);
+	}
+	if ((opts & OPT_IPSTATES) && (ioctl(fd, SIOCGIPST, &ipsst) == -1)) {
+		perror("ioctl(SIOCGIPST)");
+		exit(-1);
+	}
+	if ((opts & OPT_FRSTATES) && (ioctl(fd, SIOCGFRST, &ifrst) == -1)) {
+		perror("ioctl(SIOCGFRST)");
+		exit(-1);
+	}
+
+	if (opts & OPT_VERBOSE)
+		PRINTF("opts %#x name %s\n", opts, name ? name : "<>");
+	if (opts & OPT_SHOWLIST) {
+		showlist(&fio);
+		if((opts & OPT_OUTQUE) && (opts & OPT_INQUE)){
+			opts &= ~OPT_OUTQUE;
+			showlist(&fio);
+		}
+	} else {
+		if (opts & OPT_IPSTATES)
+			showipstates(fd, &ipsst);
+		else if (opts & OPT_FRSTATES)
+			showfrstates(fd, &ifrst);
+		else
+			showstats(fd, &fio);
+	}
+	return 0;
+}
+
+
+/*
+ * read the kernel stats for packets blocked and passed
+ */
+static	void	showstats(fd, fp)
+int	fd;
+struct	friostat	*fp;
+{
+	int	frf = 0;
+
+	if (ioctl(fd, SIOCGETFF, &frf) == -1)
+		perror("ioctl(SIOCGETFF)");
+
+#if SOLARIS
+	PRINTF("dropped packets:\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_drop, fp->f_st[1].fr_drop);
+	PRINTF("non-ip packets:\t\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_notip, fp->f_st[1].fr_notip);
+	PRINTF("   bad packets:\t\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_bad, fp->f_st[1].fr_bad);
+#endif
+	PRINTF(" input packets:\t\tblocked %lu passed %lu nomatch %lu",
+			fp->f_st[0].fr_block, fp->f_st[0].fr_pass,
+			fp->f_st[0].fr_nom);
+	PRINTF(" counted %lu\n", fp->f_st[0].fr_acct);
+	PRINTF("output packets:\t\tblocked %lu passed %lu nomatch %lu",
+			fp->f_st[1].fr_block, fp->f_st[1].fr_pass,
+			fp->f_st[1].fr_nom);
+	PRINTF(" counted %lu\n", fp->f_st[0].fr_acct);
+	PRINTF(" input packets logged:\tblocked %lu passed %lu\n",
+			fp->f_st[0].fr_bpkl, fp->f_st[0].fr_ppkl);
+	PRINTF("output packets logged:\tblocked %lu passed %lu\n",
+			fp->f_st[1].fr_bpkl, fp->f_st[1].fr_ppkl);
+	PRINTF(" packets logged:\tinput %lu output %lu\n",
+			fp->f_st[0].fr_pkl, fp->f_st[1].fr_pkl);
+	PRINTF(" log failures:\t\tinput %lu output %lu\n",
+			fp->f_st[0].fr_skip, fp->f_st[1].fr_skip);
+	PRINTF("fragment state(in):\tkept %lu\tlost %lu\n",
+			fp->f_st[0].fr_nfr, fp->f_st[0].fr_bnfr);
+	PRINTF("fragment state(out):\tkept %lu\tlost %lu\n",
+			fp->f_st[1].fr_nfr, fp->f_st[1].fr_bnfr);
+	PRINTF("packet state(in):\tkept %lu\tlost %lu\n",
+			fp->f_st[0].fr_ads, fp->f_st[0].fr_bads);
+	PRINTF("packet state(out):\tkept %lu\tlost %lu\n",
+			fp->f_st[1].fr_ads, fp->f_st[1].fr_bads);
+	PRINTF("ICMP replies:\t%lu\tTCP RSTs sent:\t%lu\n",
+			fp->f_st[0].fr_ret, fp->f_st[1].fr_ret);
+	PRINTF("Result cache hits(in):\t%lu\t(out):\t%lu\n",
+			fp->f_st[0].fr_chit, fp->f_st[1].fr_chit);
+	PRINTF("IN Pullups succeeded:\t%lu\tfailed:\t%lu\n",
+			fp->f_st[0].fr_pull[0], fp->f_st[0].fr_pull[1]);
+	PRINTF("OUT Pullups succeeded:\t%lu\tfailed:\t%lu\n",
+			fp->f_st[1].fr_pull[0], fp->f_st[1].fr_pull[1]);
+
+	PRINTF("Packet log flags set: (%#x)\n", frf);
+	if (frf & FF_LOGPASS)
+		PRINTF("\tpackets passed through filter\n");
+	if (frf & FF_LOGBLOCK)
+		PRINTF("\tpackets blocked by filter\n");
+	if (!frf)
+		PRINTF("\tnone\n");
+}
+
+/*
+ * print out filter rule list
+ */
+static	void	showlist(fiop)
+struct	friostat	*fiop;
+{
+	struct	frentry	fb;
+	struct	frentry	*fp = NULL;
+	int	i, set, n;
+
+	set = fiop->f_active;
+	if (opts & OPT_INACTIVE)
+		set = 1 - set;
+	if (opts & OPT_ACCNT) {
+		i = F_AC;
+		if (opts & OPT_OUTQUE) {
+			fp = (struct frentry *)fiop->f_acctout[set];
+			i++;
+		} else if (opts & OPT_INQUE)
+			fp = (struct frentry *)fiop->f_acctin[set];
+	} else if (opts & OPT_OUTQUE) {
+		i = F_OUT;
+		fp = (struct frentry *)fiop->f_fout[set];
+	} else if (opts & OPT_INQUE) {
+		i = F_IN;
+		fp = (struct frentry *)fiop->f_fin[set];
+	} else
+		return;
+	if (opts & OPT_VERBOSE)
+		FPRINTF(stderr, "showlist:opts %#x i %d\n", opts, i);
+
+	if (opts & OPT_VERBOSE)
+		PRINTF("fp %#x set %d\n", (u_int)fp, set);
+	if (!fp) {
+		FPRINTF(stderr, "empty list for %s%s\n",
+			(opts & OPT_INACTIVE) ? "inactive " : "", filters[i]);
+		return;
+	}
+
+	for (n = 1; fp; n++) {
+		if (kmemcpy((char *)&fb, (u_long)fp, sizeof(fb)) == -1) {
+			perror("kmemcpy");
+			return;
+		}
+		fp = &fb;
+		if (opts & OPT_OUTQUE)
+			fp->fr_flags |= FR_OUTQUE;
+		if (opts & (OPT_HITS|OPT_VERBOSE))
+			PRINTF("%ld ", fp->fr_hits);
+		if (opts & (OPT_ACCNT|OPT_VERBOSE))
+			PRINTF("%ld ", fp->fr_bytes);
+		if (opts & OPT_SHOWLINENO)
+			PRINTF("@%d ", n);
+		printfr(fp);
+		if (opts & OPT_VERBOSE)
+			binprint(fp);
+		fp = fp->fr_next;
+	}
+}
+
+
+static void showipstates(fd, ipsp)
+int fd;
+ips_stat_t *ipsp;
+{
+	ipstate_t *istab[IPSTATE_SIZE], ips;
+	int i;
+
+	PRINTF("IP states added:\n\t%lu TCP\n\t%lu UDP\n\t%lu ICMP\n",
+		ipsp->iss_tcp, ipsp->iss_udp, ipsp->iss_icmp);
+	PRINTF("\t%lu hits\n\t%lu misses\n", ipsp->iss_hits, ipsp->iss_miss);
+	PRINTF("\t%lu maximum\n\t%lu no memory\n",
+		ipsp->iss_max, ipsp->iss_nomem);
+	PRINTF("\t%lu active\n\t%lu expired\n\t%lu closed\n",
+		ipsp->iss_active, ipsp->iss_expire, ipsp->iss_fin);
+	if (kmemcpy((char *)istab, (u_long)ipsp->iss_table, sizeof(istab)))
+		return;
+	for (i = 0; i < IPSTATE_SIZE; i++)
+		while (istab[i]) {
+			if (kmemcpy(&ips, istab[i], sizeof(ips)) == -1)
+				break;
+			PRINTF("%s -> ", inet_ntoa(ips.is_src));
+			PRINTF("%s age %d pass %d pr %d state %d/%d\n",
+				inet_ntoa(ips.is_dst), ips.is_age,
+				ips.is_pass, ips.is_p, ips.is_state[0],
+				ips.is_state[1]);
+			if (ips.is_p == IPPROTO_TCP)
+				PRINTF("\t%hu -> %hu %lu:%lu %hu:%hu\n",
+					ntohs(ips.is_sport),
+					ntohs(ips.is_dport),
+					ips.is_seq, ips.is_ack,
+					ips.is_swin, ips.is_dwin);
+			else if (ips.is_p == IPPROTO_UDP)
+				PRINTF("\t%hu -> %hu\n", ntohs(ips.is_sport),
+					ntohs(ips.is_dport));
+			else if (ips.is_p == IPPROTO_ICMP)
+				PRINTF("\t%hu %hu %d\n", ips.is_icmp.ics_id,
+					ips.is_icmp.ics_seq,
+					ips.is_icmp.ics_type);
+			istab[i] = ips.is_next;
+		}
+}
+
+
+static void showfrstates(fd, ifsp)
+int fd;
+ipfrstat_t *ifsp;
+{
+	struct ipfr *ipfrtab[IPFT_SIZE], ifr;
+	int i;
+
+	PRINTF("IP fragment states:\n\t%lu new\n\t%lu expired\n\t%lu hits\n",
+		ifsp->ifs_new, ifsp->ifs_expire, ifsp->ifs_hits);
+	PRINTF("\t%lu no memory\n\t%lu already exist\n",
+		ifsp->ifs_nomem, ifsp->ifs_exists);
+	PRINTF("\t%lu inuse\n", ifsp->ifs_inuse);
+	if (kmemcpy((char *)ipfrtab, (u_long)ifsp->ifs_table, sizeof(ipfrtab)))
+		return;
+	for (i = 0; i < IPFT_SIZE; i++)
+		while (ipfrtab[i]) {
+			if (kmemcpy(&ifr, (u_long)ipfrtab[i],
+				    sizeof(ifr)) == -1)
+				break;
+			PRINTF("%s -> ", inet_ntoa(ifr.ipfr_src));
+			PRINTF("%s %d %d %d %#02x = %#x\n",
+				inet_ntoa(ifr.ipfr_dst), ifr.ipfr_id,
+				ifr.ipfr_ttl, ifr.ipfr_p, ifr.ipfr_tos,
+				ifr.ipfr_pass);
+			ipfrtab[i] = ifr.ipfr_next;
+		}
+}
diff --git a/contrib/ipfilter/inet_addr.c b/contrib/ipfilter/inet_addr.c
new file mode 100644
index 0000000..91faec3
--- /dev/null
+++ b/contrib/ipfilter/inet_addr.c
@@ -0,0 +1,182 @@
+/*
+ * ++Copyright++ 1983, 1990, 1993
+ * -
+ * Copyright (c) 1983, 1990, 1993
+ *    The Regents of the University of California.  All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ * 	This product includes software developed by the University of
+ * 	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)inet_addr.c	8.1 (Berkeley) 6/17/93";
+static char rcsid[] = "$Id: inet_addr.c,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+/* 
+ * Check whether "cp" is a valid ascii representation
+ * of an Internet address and convert to a binary address.
+ * Returns 1 if the address is valid, 0 if not.
+ * This replaces inet_addr, the return value from which
+ * cannot distinguish between failure and a local broadcast address.
+ */
+int
+inet_aton(cp, addr)
+	register const char *cp;
+	struct in_addr *addr;
+{
+	register u_long val;
+	register int base, n;
+	register char c;
+	u_int parts[4];
+	register u_int *pp = parts;
+
+	c = *cp;
+	for (;;) {
+		/*
+		 * Collect number up to ``.''.
+		 * Values are specified as for C:
+		 * 0x=hex, 0=octal, isdigit=decimal.
+		 */
+		if (!isdigit(c))
+			return (0);
+		val = 0; base = 10;
+		if (c == '0') {
+			c = *++cp;
+			if (c == 'x' || c == 'X')
+				base = 16, c = *++cp;
+			else
+				base = 8;
+		}
+		for (;;) {
+			if (isascii(c) && isdigit(c)) {
+				val = (val * base) + (c - '0');
+				c = *++cp;
+			} else if (base == 16 && isascii(c) && isxdigit(c)) {
+				val = (val << 4) |
+					(c + 10 - (islower(c) ? 'a' : 'A'));
+				c = *++cp;
+			} else
+				break;
+		}
+		if (c == '.') {
+			/*
+			 * Internet format:
+			 *	a.b.c.d
+			 *	a.b.c	(with c treated as 16 bits)
+			 *	a.b	(with b treated as 24 bits)
+			 */
+			if (pp >= parts + 3)
+				return (0);
+			*pp++ = val;
+			c = *++cp;
+		} else
+			break;
+	}
+	/*
+	 * Check for trailing characters.
+	 */
+	if (c != '\0' && (!isascii(c) || !isspace(c)))
+		return (0);
+	/*
+	 * Concoct the address according to
+	 * the number of parts specified.
+	 */
+	n = pp - parts + 1;
+	switch (n) {
+
+	case 0:
+		return (0);		/* initial nondigit */
+
+	case 1:				/* a -- 32 bits */
+		break;
+
+	case 2:				/* a.b -- 8.24 bits */
+		if (val > 0xffffff)
+			return (0);
+		val |= parts[0] << 24;
+		break;
+
+	case 3:				/* a.b.c -- 8.8.16 bits */
+		if (val > 0xffff)
+			return (0);
+		val |= (parts[0] << 24) | (parts[1] << 16);
+		break;
+
+	case 4:				/* a.b.c.d -- 8.8.8.8 bits */
+		if (val > 0xff)
+			return (0);
+		val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
+		break;
+	}
+	if (addr)
+		addr->s_addr = htonl(val);
+	return (1);
+}
+
+/* these are compatibility routines, not needed on recent BSD releases */
+
+/*
+ * Ascii internet address interpretation routine.
+ * The value returned is in network order.
+ */
+u_long
+inet_addr(cp)
+	register const char *cp;
+{
+	struct in_addr val;
+
+	if (inet_aton(cp, &val))
+		return (val.s_addr);
+	return (0xffffffff);
+}
diff --git a/contrib/ipfilter/ip_compat.h b/contrib/ipfilter/ip_compat.h
new file mode 100644
index 0000000..5a36cc3
--- /dev/null
+++ b/contrib/ipfilter/ip_compat.h
@@ -0,0 +1,342 @@
+/*
+ * (C)opyright 1993, 1994, 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ip_compat.h	1.8 1/14/96
+ * $Id: ip_compat.h,v 2.0.1.4 1997/02/04 14:24:25 darrenr Exp $
+ */
+
+#ifndef	__IP_COMPAT_H_
+#define	__IP_COMPAT_H__
+
+#ifndef	SOLARIS
+#define	SOLARIS	(defined(sun) && (defined(__svr4__) || defined(__SVR4)))
+#endif
+#if	SOLARIS
+#define	MTYPE(m)	((m)->b_datap->db_type)
+#endif
+#define	IPMINLEN(i, h)	((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
+
+#ifndef	IP_OFFMASK
+#define	IP_OFFMASK	0x1fff
+#endif
+
+#ifndef	MAX
+#define	MAX(a,b)	(((a) > (b)) ? (a) : (b))
+#endif
+
+/*
+ * Security Options for Intenet Protocol (IPSO) as defined in RFC 1108.
+ *
+ * Basic Option
+ *
+ * 00000001   -   (Reserved 4)
+ * 00111101   -   Top Secret
+ * 01011010   -   Secret
+ * 10010110   -   Confidential
+ * 01100110   -   (Reserved 3)
+ * 11001100   -   (Reserved 2)
+ * 10101011   -   Unclassified
+ * 11110001   -   (Reserved 1)
+ */
+#define	IPSO_CLASS_RES4		0x01
+#define	IPSO_CLASS_TOPS		0x3d
+#define	IPSO_CLASS_SECR		0x5a
+#define	IPSO_CLASS_CONF		0x96
+#define	IPSO_CLASS_RES3		0x66
+#define	IPSO_CLASS_RES2		0xcc
+#define	IPSO_CLASS_UNCL		0xab
+#define	IPSO_CLASS_RES1		0xf1
+
+#define	IPSO_AUTH_GENSER	0x80
+#define	IPSO_AUTH_ESI		0x40
+#define	IPSO_AUTH_SCI		0x20
+#define	IPSO_AUTH_NSA		0x10
+#define	IPSO_AUTH_DOE		0x08
+#define	IPSO_AUTH_UN		0x06
+#define	IPSO_AUTH_FTE		0x01
+
+/*
+ * IP option #defines
+ */
+/*#define	IPOPT_RR	7 */
+#define	IPOPT_ZSU	10	/* ZSU */
+#define	IPOPT_MTUP	11	/* MTUP */
+#define	IPOPT_MTUR	12	/* MTUR */
+#define	IPOPT_ENCODE	15	/* ENCODE */
+/*#define	IPOPT_TS	68 */
+#define	IPOPT_TR	82	/* TR */
+/*#define	IPOPT_SECURITY	130 */
+/*#define	IPOPT_LSRR	131 */
+#define	IPOPT_E_SEC	133	/* E-SEC */
+#define	IPOPT_CIPSO	134	/* CIPSO */
+/*#define	IPOPT_SATID	136 */
+#ifndef	IPOPT_SID
+# define	IPOPT_SID	IPOPT_SATID
+#endif
+/*#define	IPOPT_SSRR	137 */
+#define	IPOPT_ADDEXT	147	/* ADDEXT */
+#define	IPOPT_VISA	142	/* VISA */
+#define	IPOPT_IMITD	144	/* IMITD */
+#define	IPOPT_EIP	145	/* EIP */
+#define	IPOPT_FINN	205	/* FINN */
+
+
+/*
+ * Build some macros and #defines to enable the same code to compile anywhere
+ * Well, that's the idea, anyway :-)
+ */
+#ifdef _KERNEL
+# if SOLARIS
+#  define	MUTEX_ENTER(x)	mutex_enter(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))
+# else
+#  define	MUTEX_ENTER(x)	;
+#  define	MUTEX_EXIT(x)	;
+#  ifndef linux
+#   define	MTOD(m,t)	mtod(m,t)
+#   define	IRCOPY(a,b,c)	bcopy((a), (b), (c))
+#   define	IWCOPY(a,b,c)	bcopy((a), (b), (c))
+#  endif
+# endif /* SOLARIS */
+
+# ifdef sun
+#  if defined(__svr4__) || defined(__SVR4)
+#   define	GETUNIT(n)	get_unit((n))
+#  else
+#   include	<sys/kmem_alloc.h>
+#   define	GETUNIT(n)	ifunit((n), IFNAMSIZ)
+#  endif
+# else
+#  define	GETUNIT(n)	ifunit((n))
+# endif /* sun */
+
+# if defined(sun) && !defined(linux)
+#  define	UIOMOVE(a,b,c,d)	uiomove(a,b,c,d)
+#  define	SLEEP(id, n)	sleep((id), PZERO+1)
+#  define	KFREE(x)	kmem_free((char *)(x), sizeof(*(x)))
+#  if SOLARIS
+typedef	struct	qif	{
+	struct	qif	*qf_next;
+	ill_t	*qf_ill;
+	kmutex_t	qf_lock;
+	void	*qf_iptr;
+	void	*qf_optr;
+	queue_t	*qf_in;
+	queue_t	*qf_out;
+	void	*qf_wqinfo;
+	void	*qf_rqinfo;
+	int	(*qf_inp)();
+	int	(*qf_outp)();
+	mblk_t	*qf_m;
+	int	qf_len;
+	char	qf_name[8];
+	/*
+	 * in case the ILL has disappeared...
+	 */
+	int	qf_hl;	/* header length */
+} qif_t;
+#   define	SPLNET(x)	;
+#   undef	SPLX
+#   define	SPLX(x)		;
+#   ifdef	sparc
+#    define	ntohs(x)	(x)
+#    define	ntohl(x)	(x)
+#    define	htons(x)	(x)
+#    define	htonl(x)	(x)
+#   endif
+#   define	KMALLOC(x)	kmem_alloc((x), KM_NOSLEEP)
+#   define	GET_MINOR(x)	getminor(x)
+#  else
+#   define	KMALLOC(x)	new_kmem_alloc((x), KMEM_NOSLEEP)
+#  endif /* __svr4__ */
+# endif /* sun && !linux */
+# ifndef	GET_MINOR
+#  define	GET_MINOR(x)	minor(x)
+# endif
+# if BSD >= 199306 || defined(__FreeBSD__)
+#  include <vm/vm.h>
+#  if !defined(__FreeBSD__)
+#   include <vm/vm_extern.h>
+#   include <sys/proc.h>
+extern	vm_map_t	kmem_map;
+#  else
+#   include <vm/vm_kern.h>
+#  endif /* __FreeBSD__ */
+/*
+** #  define	KMALLOC(x)	kmem_alloc(kmem_map, (x))
+** #  define	KFREE(x)	kmem_free(kmem_map, (vm_offset_t)(x), \
+					  sizeof(*(x)))
+*/
+#  ifdef	M_PFIL
+#   define	KMALLOC(x)	malloc((x), M_PFIL, M_NOWAIT)
+#   define	KFREE(x)	FREE((x), M_PFIL)
+#  else
+#   define	KMALLOC(x)	malloc((x), M_TEMP, M_NOWAIT)
+#   define	KFREE(x)	FREE((x), M_TEMP)
+#  endif
+#  define	UIOMOVE(a,b,c,d)	uiomove(a,b,d)
+#  define	SLEEP(id, n)	tsleep((id), PPAUSE|PCATCH, n, 0)
+# endif /* BSD */
+# if defined(NetBSD1_0) && (NetBSD1_0 > 1)
+#  define	SPLNET(x)	x = splsoftnet()
+# else
+#  if !SOLARIS
+#   define	SPLNET(x)	x = splnet()
+#   define	SPLX(x)		(void) splx(x)
+#  endif
+# endif
+#else
+# ifndef	linux
+#  define	MUTEX_ENTER(x)	;
+#  define	MUTEX_EXIT(x)	;
+#  define	SPLNET(x)	;
+#  define	SPLX(x)		;
+#  define	KMALLOC(x)	malloc(x)
+#  define	KFREE(x)	free(x)
+#  define	GETUNIT(x)	(x)
+#  define	IRCOPY(a,b,c)	bcopy((a), (b), (c))
+#  define	IWCOPY(a,b,c)	bcopy((a), (b), (c))
+# endif
+#endif /* KERNEL */
+
+#ifdef linux
+# define	ICMP_UNREACH	ICMP_DEST_UNREACH
+# define	ICMP_SOURCEQUENCH	ICMP_SOURCE_QUENCH
+# define	ICMP_TIMXCEED	ICMP_TIME_EXCEEDED
+# define	ICMP_PARAMPROB	ICMP_PARAMETERPROB
+
+# define	TH_FIN	0x01
+# define	TH_SYN	0x02
+# define	TH_RST	0x04
+# define	TH_PUSH	0x08
+# define	TH_ACK	0x10
+# define	TH_URG	0x20
+
+typedef	struct	{
+	__u16	th_sport;
+	__u16	th_dport;
+	__u32	th_seq;
+	__u32	th_ack;
+	__u8	th_x;
+	__u8	th_flags;
+	__u16	th_win;
+	__u16	th_sum;
+	__u16	th_urp;
+} tcphdr_t;
+
+typedef	struct	{
+	__u16	uh_sport;
+	__u16	uh_dport;
+	__u16	uh_ulen;
+	__u16	uh_sun;
+} udphdr_t;
+
+typedef	struct	{
+# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
+    defined(vax)
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# else
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# endif
+	__u8	ip_tos;
+	__u16	ip_len;
+	__u16	ip_id;
+	__u16	ip_off;
+	__u8	ip_ttl;
+	__u8	ip_p;
+	__u16	ip_sum;
+	struct	in_addr	ip_src;
+	struct	in_addr	ip_dst;
+} ip_t;
+
+/*
+ * Structure of an icmp header.
+ */
+struct icmp {
+	u_char	icmp_type;		/* type of message, see below */
+	u_char	icmp_code;		/* type sub code */
+	u_short	icmp_cksum;		/* ones complement cksum of struct */
+	union {
+		u_char ih_pptr;			/* ICMP_PARAMPROB */
+		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
+		struct ih_idseq {
+			n_short	icd_id;
+			n_short	icd_seq;
+		} ih_idseq;
+		int ih_void;
+	} icmp_hun;
+# define	icmp_pptr	icmp_hun.ih_pptr
+# define	icmp_gwaddr	icmp_hun.ih_gwaddr
+# define	icmp_id		icmp_hun.ih_idseq.icd_id
+# define	icmp_seq	icmp_hun.ih_idseq.icd_seq
+# define	icmp_void	icmp_hun.ih_void
+	union {
+		struct id_ts {
+			n_time its_otime;
+			n_time its_rtime;
+			n_time its_ttime;
+		} id_ts;
+		struct id_ip  {
+			ip_t idi_ip;
+			/* options and then 64 bits of data */
+		} id_ip;
+		u_long	id_mask;
+		char	id_data[1];
+	} icmp_dun;
+# define	icmp_otime	icmp_dun.id_ts.its_otime
+# define	icmp_rtime	icmp_dun.id_ts.its_rtime
+# define	icmp_ttime	icmp_dun.id_ts.its_ttime
+# define	icmp_ip		icmp_dun.id_ip.idi_ip
+# define	icmp_mask	icmp_dun.id_mask
+# define	icmp_data	icmp_dun.id_data
+};
+
+struct ipovly {
+	caddr_t	ih_next, ih_prev;	/* for protocol sequence q's */
+	u_char	ih_x1;			/* (unused) */
+	u_char	ih_pr;			/* protocol */
+	short	ih_len;			/* protocol length */
+	struct	in_addr ih_src;		/* source internet address */
+	struct	in_addr ih_dst;		/* destination internet address */
+};
+
+# define	SPLX(x)		(void)
+# define	SPLNET(x)	(void)
+
+# define	bcopy(a,b,c)	memmove(b,a,c)
+# define	bcmp(a,b,c)	memcmp(a,b,c)
+
+# define	UNITNAME(n)	dev_get((n))
+# define	ifnet	device
+
+# define	KMALLOC(x)	kmalloc((x), GFP_ATOMIC)
+# define	KFREE(x)	kfree_s((x), sizeof(*(x)))
+# define	IRCOPY(a,b,c)	{ \
+				 error = verify_area(VERIFY_READ, \
+						     (b) ,sizeof((b))); \
+				 if (!error) \
+					memcpy_fromfs((b), (a), (c)); \
+				}
+# define	IWCOPY(a,b,c)	{ \
+				 error = verify_area(VERIFY_WRITE, \
+						     (b) ,sizeof((b))); \
+				 if (!error) \
+					memcpy_tofs((b), (a), (c)); \
+				}
+#else
+typedef	struct	tcphdr	tcphdr_t;
+typedef	struct	udphdr	udphdr_t;
+typedef	struct	icmp	icmphdr_t;
+typedef	struct	ip	ip_t;
+#endif /* linux */
+
+#endif	/* __IP_COMPAT_H__ */
diff --git a/contrib/ipfilter/ip_fil.c b/contrib/ipfilter/ip_fil.c
new file mode 100644
index 0000000..7a24434
--- /dev/null
+++ b/contrib/ipfilter/ip_fil.c
@@ -0,0 +1,885 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ip_fil.c	2.41 6/5/96 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: ip_fil.c,v 2.0.1.5 1997/01/29 13:41:45 darrenr Exp $";
+#endif
+
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/systm.h>
+#include <sys/uio.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#ifdef sun
+#include <net/af.h>
+#endif
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include <syslog.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_frag.h"
+#include "ip_nat.h"
+#include "ip_state.h"
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+extern	fr_flags, fr_active;
+extern	struct	protosw	inetsw[];
+extern	int	(*fr_checkp)();
+#if	BSD < 199306
+extern	int	ipfr_slowtimer();
+static	int	(*fr_saveslowtimo)();
+extern	int	tcp_ttl;
+#else
+extern	void	ipfr_slowtimer();
+static	void	(*fr_saveslowtimo)();
+#endif
+
+int	ipl_inited = 0;
+int	ipl_unreach = ICMP_UNREACH_FILTER;
+int	send_reset();
+
+#ifdef	IPFILTER_LOG
+# define LOGSIZE	8192
+int	ipllog();
+char	iplbuf[LOGSIZE];
+caddr_t	iplh = iplbuf, iplt = iplbuf;
+static	int	iplused = 0;
+#endif /* IPFILTER_LOG */
+static	void	frflush();
+static	int	frrequest();
+static	int	(*fr_savep)();
+
+#if _BSDI_VERSION >= 199501
+# include <sys/device.h>
+# include <sys/conf.h>
+
+int	iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
+int	iplopen __P((dev_t, int, int, struct proc *));
+int	iplclose __P((dev_t, int, int, struct proc *));
+# ifdef IPFILTER_LOG
+int	iplread __P((dev_t, struct uio *, int));
+# else
+#  define iplread	noread
+# endif
+int	iplioctl __P((dev_t, int, caddr_t, int, struct proc *));
+
+struct cfdriver iplcd = {
+	NULL, "ipl", NULL, NULL, DV_DULL, 0
+};
+
+struct devsw iplsw = {
+	&iplcd,
+	iplopen, iplclose, iplread, nowrite, iplioctl, noselect, nommap,
+	nostrat, nodump, nopsize, 0,
+	nostop
+};
+#endif /* _BSDI_VERSION >= 199501 */
+
+#ifdef	IPFILTER_LKM
+int iplidentify(s)
+char *s;
+{
+	if (strcmp(s, "ipl") == 0)
+		return 1;
+	return 0;
+}
+#endif /* IPFILTER_LKM */
+
+
+int iplattach()
+{
+	int s;
+
+	SPLNET(s);
+	if (ipl_inited || (fr_checkp == fr_check)) {
+		printf("IP Filter: already initialized\n");
+		SPLX(s);
+		return EBUSY;
+	}
+	ipl_inited = 1;
+	bzero((char *)nat_table, sizeof(nat_t *) * NAT_SIZE * 2);
+	fr_savep = fr_checkp;
+	fr_checkp = fr_check;
+	fr_saveslowtimo = inetsw[0].pr_slowtimo;
+	inetsw[0].pr_slowtimo = ipfr_slowtimer;
+	SPLX(s);
+	return 0;
+}
+
+
+int ipldetach()
+{
+	int s, i = FR_INQUE|FR_OUTQUE;
+
+	SPLNET(s);
+	if (!ipl_inited)
+	{
+		printf("IP Filter: not initialized\n");
+		SPLX(s);
+		return EBUSY;
+	}
+
+	fr_checkp = fr_savep;
+	inetsw[0].pr_slowtimo = fr_saveslowtimo;
+	frflush((caddr_t)&i);
+	ipl_inited = 0;
+
+	ipfr_unload();
+	ip_natunload();
+	fr_stateunload();
+
+	SPLX(s);
+	return 0;
+}
+
+
+static	void	frzerostats(data)
+caddr_t	data;
+{
+	struct	friostat	fio;
+
+	bcopy((char *)frstats, (char *)fio.f_st,
+		sizeof(struct filterstats) * 2);
+	fio.f_fin[0] = ipfilter[0][0];
+	fio.f_fin[1] = ipfilter[0][1];
+	fio.f_fout[0] = ipfilter[1][0];
+	fio.f_fout[1] = ipfilter[1][1];
+	fio.f_acctin[0] = ipacct[0][0];
+	fio.f_acctin[1] = ipacct[0][1];
+	fio.f_acctout[0] = ipacct[1][0];
+	fio.f_acctout[1] = ipacct[1][1];
+	fio.f_active = fr_active;
+	IWCOPY((caddr_t)&fio, data, sizeof(fio));
+	bzero((char *)frstats, sizeof(*frstats) * 2);
+}
+
+
+static void frflush(data)
+caddr_t data;
+{
+	struct frentry *f, **fp;
+	int flags = *(int *)data, flushed = 0, set = fr_active;
+
+	bzero((char *)frcache, sizeof(frcache[0]) * 2);
+
+	if (flags & FR_INACTIVE)
+		set = 1 - set;
+	if (flags & FR_OUTQUE) {
+		for (fp = &ipfilter[1][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+		for (fp = &ipacct[1][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+	}
+	if (flags & FR_INQUE) {
+		for (fp = &ipfilter[0][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+		for (fp = &ipacct[0][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+	}
+	*(int *)data = flushed;
+}
+
+
+/*
+ * Filter ioctl interface.
+ */
+int iplioctl(dev, cmd, data, mode
+#if _BSDI_VERSION >= 199501
+, p)
+struct proc *p;
+#else
+)
+#endif
+dev_t dev;
+int cmd;
+caddr_t data;
+int mode;
+{
+	int error = 0, s, unit;
+
+	unit = minor(dev);
+	if (unit != 0)
+		return ENXIO;
+
+	SPLNET(s);
+	switch (cmd) {
+	case FIONREAD :
+#ifdef IPFILTER_LOG
+		*(int *)data = iplused;
+#endif
+		break;
+#ifndef	IPFILTER_LKM
+	case SIOCFRENB :
+	{
+		u_int	enable;
+
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else {
+			IRCOPY(data, (caddr_t)&enable, sizeof(enable));
+			if (enable)
+				error = iplattach();
+			else
+				error = ipldetach();
+		}
+		break;
+	}
+#endif
+	case SIOCSETFF :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else
+			IRCOPY(data, (caddr_t)&fr_flags, sizeof(fr_flags));
+		break;
+	case SIOCGETFF :
+		IWCOPY((caddr_t)&fr_flags, data, sizeof(fr_flags));
+		break;
+	case SIOCINAFR :
+	case SIOCRMAFR :
+	case SIOCADAFR :
+	case SIOCZRLST :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else
+			error = frrequest(cmd, data, fr_active);
+		break;
+	case SIOCINIFR :
+	case SIOCRMIFR :
+	case SIOCADIFR :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else
+			error = frrequest(cmd, data, 1 - fr_active);
+		break;
+	case SIOCSWAPA :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else {
+			bzero((char *)frcache, sizeof(frcache[0]) * 2);
+			*(u_int *)data = fr_active;
+			fr_active = 1 - fr_active;
+		}
+		break;
+	case SIOCGETFS :
+	{
+		struct	friostat	fio;
+
+		bcopy((char *)frstats, (char *)fio.f_st,
+			sizeof(struct filterstats) * 2);
+		fio.f_fin[0] = ipfilter[0][0];
+		fio.f_fin[1] = ipfilter[0][1];
+		fio.f_fout[0] = ipfilter[1][0];
+		fio.f_fout[1] = ipfilter[1][1];
+		fio.f_acctin[0] = ipacct[0][0];
+		fio.f_acctin[1] = ipacct[0][1];
+		fio.f_acctout[0] = ipacct[1][0];
+		fio.f_acctout[1] = ipacct[1][1];
+		fio.f_active = fr_active;
+		IWCOPY((caddr_t)&fio, data, sizeof(fio));
+		break;
+	}
+	case	SIOCFRZST :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else
+			frzerostats(data);
+		break;
+	case	SIOCIPFFL :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else
+			frflush(data);
+		break;
+#ifdef	IPFILTER_LOG
+	case	SIOCIPFFB :
+		if (!(mode & FWRITE))
+			error = EPERM;
+		else {
+			*(int *)data = iplused;
+			iplh = iplt = iplbuf;
+			iplused = 0;
+		}
+		break;
+#endif /* IPFILTER_LOG */
+	case SIOCADNAT :
+	case SIOCRMNAT :
+	case SIOCGNATS :
+	case SIOCGNATL :
+	case SIOCFLNAT :
+	case SIOCCNATL :
+		error = nat_ioctl(data, cmd, mode);
+		break;
+	case SIOCGFRST :
+		IWCOPY((caddr_t)ipfr_fragstats(), data, sizeof(ipfrstat_t));
+		break;
+	case SIOCGIPST :
+		IWCOPY((caddr_t)fr_statetstats(), data, sizeof(ips_stat_t));
+		break;
+	default :
+		error = EINVAL;
+		break;
+	}
+	SPLX(s);
+	return error;
+}
+
+
+static int frrequest(req, data, set)
+int req, set;
+caddr_t data;
+{
+	register frentry_t *fp, *f, **fprev;
+	register frentry_t **ftail;
+	frentry_t fr;
+	frdest_t *fdp;
+	struct frentry frd;
+	int error = 0, in;
+
+	fp = &fr;
+	IRCOPY(data, (caddr_t)fp, sizeof(*fp));
+
+	bzero((char *)frcache, sizeof(frcache[0]) * 2);
+
+	in = (fp->fr_flags & FR_INQUE) ? 0 : 1;
+	if (fp->fr_flags & FR_ACCOUNT) {
+		ftail = fprev = &ipacct[in][set];
+	} else if (fp->fr_flags & (FR_OUTQUE|FR_INQUE))
+		ftail = fprev = &ipfilter[in][set];
+	else
+		return ESRCH;
+
+	IRCOPY((char *)fp, (char *)&frd, sizeof(frd));
+	fp = &frd;
+	if (*fp->fr_ifname) {
+		fp->fr_ifa = GETUNIT(fp->fr_ifname);
+		if (!fp->fr_ifa)
+			fp->fr_ifa = (struct ifnet *)-1;
+	}
+
+	fdp = &fp->fr_dif;
+	fp->fr_flags &= ~FR_DUP;
+	if (*fdp->fd_ifname) {
+		fdp->fd_ifp = GETUNIT(fdp->fd_ifname);
+		if (!fdp->fd_ifp)
+			fdp->fd_ifp = (struct ifnet *)-1;
+		else
+			fp->fr_flags |= FR_DUP;
+	}
+
+	fdp = &fp->fr_tif;
+	if (*fdp->fd_ifname) {
+		fdp->fd_ifp = GETUNIT(fdp->fd_ifname);
+		if (!fdp->fd_ifp)
+			fdp->fd_ifp = (struct ifnet *)-1;
+	}
+
+	/*
+	 * Look for a matching filter rule, but don't include the next or
+	 * interface pointer in the comparison (fr_next, fr_ifa).
+	 */
+	for (; (f = *ftail); ftail = &f->fr_next)
+		if (bcmp((char *)&f->fr_ip, (char *)&fp->fr_ip,
+			 FR_CMPSIZ) == 0)
+			break;
+
+	/*
+	 * If zero'ing statistics, copy current to caller and zero.
+	 */
+	if (req == SIOCZRLST) {
+		if (!f)
+			return ESRCH;
+		IWCOPY((caddr_t)f, data, sizeof(*f));
+		f->fr_hits = 0;
+		f->fr_bytes = 0;
+		return 0;
+	}
+
+	if (!f) {
+		ftail = fprev;
+		if (req != SIOCINAFR && req != SIOCINIFR)
+			while ((f = *ftail))
+				ftail = &f->fr_next;
+		else if (fp->fr_hits)
+			while (--fp->fr_hits && (f = *ftail))
+				ftail = &f->fr_next;
+		f = NULL;
+	}
+
+	if (req == SIOCDELFR || req == SIOCRMIFR) {
+		if (!f)
+			error = ESRCH;
+		else {
+			*ftail = f->fr_next;
+			(void) KFREE(f);
+		}
+	} else {
+		if (f)
+			error = EEXIST;
+		else {
+			if ((f = (struct frentry *)KMALLOC(sizeof(*f)))) {
+				bcopy((char *)fp, (char *)f, sizeof(*f));
+				f->fr_hits = 0;
+				f->fr_next = *ftail;
+				*ftail = f;
+			} else
+				error = ENOMEM;
+		}
+	}
+	return (error);
+}
+
+
+#if !defined(linux)
+/*
+ * routines below for saving IP headers to buffer
+ */
+int iplopen(dev, flags
+#if _BSDI_VERSION >= 199501
+, devtype, p)
+int devtype;
+struct proc *p;
+#else
+)
+#endif
+dev_t dev;
+int flags;
+{
+	u_int min = minor(dev);
+
+	if (min)
+		min = ENXIO;
+	return min;
+}
+
+
+int iplclose(dev, flags
+#if _BSDI_VERSION >= 199501
+, devtype, p)
+int devtype;
+struct proc *p;
+#else
+)
+#endif
+dev_t dev;
+int flags;
+{
+	u_int	min = minor(dev);
+
+	if (min)
+		min = ENXIO;
+	return min;
+}
+
+# ifdef	IPFILTER_LOG
+/*
+ * iplread/ipllog
+ * both of these must operate with at least splnet() lest they be
+ * called during packet processing and cause an inconsistancy to appear in
+ * the filter lists.
+ */
+#  if BSD >= 199306
+int iplread(dev, uio, ioflag)
+int ioflag;
+#  else
+int iplread(dev, uio)
+#  endif
+dev_t dev;
+register struct uio *uio;
+{
+	register int ret, s;
+	register size_t sz, sx;
+	int error;
+
+	if (!uio->uio_resid)
+		return 0;
+	while (!iplused) {
+		error = SLEEP(iplbuf, "ipl sleep");
+		if (error)
+			return error;
+	}
+	SPLNET(s);
+
+	sx = sz = MIN(uio->uio_resid, iplused);
+	if (iplh < iplt)
+		sz = MIN(sz, LOGSIZE - (iplt - iplbuf));
+	sx -= sz;
+
+#  if BSD >= 199306 || defined(__FreeBSD__)
+	uio->uio_rw = UIO_READ;
+#  endif
+	if (!(ret = UIOMOVE(iplt, sz, UIO_READ, uio))) {
+		iplt += sz;
+		iplused -= sz;
+		if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE))
+			iplt = iplbuf;
+
+		if (sx && !(ret = UIOMOVE(iplt, sx, UIO_READ, uio))) {
+			iplt += sx;
+			iplused -= sx;
+			if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE))
+				iplt = iplbuf;
+		}
+		if (!iplused)	/* minimise wrapping around the end */
+			iplh = iplt = iplbuf;
+	}
+	SPLX(s);
+	return ret;
+}
+# endif /* IPFILTER_LOG */
+#endif /* linux */
+
+
+#ifdef	IPFILTER_LOG
+int ipllog(flags, ip, fin, m)
+u_int flags;
+ip_t *ip;
+register fr_info_t *fin;
+struct mbuf *m;
+{
+	struct ipl_ci iplci;
+	register int len, mlen, hlen;
+	struct ifnet *ifp = fin->fin_ifp;
+
+	hlen = fin->fin_hlen;
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
+	else if (ip->ip_p == IPPROTO_ICMP) {
+		struct	icmp	*icmp = (struct icmp *)((char *)ip + hlen);
+
+		switch (icmp->icmp_type) {
+		case ICMP_UNREACH :
+		case ICMP_SOURCEQUENCH :
+		case ICMP_REDIRECT :
+		case ICMP_TIMXCEED :
+		case ICMP_PARAMPROB :
+			hlen += MIN(sizeof(struct icmp) + 8, fin->fin_dlen);
+			break;
+		default :
+			hlen += MIN(sizeof(struct icmp), fin->fin_dlen);
+			break;
+		}
+	}
+
+	mlen = (flags & FR_LOGBODY) ? MIN(ip->ip_len - hlen, 128) : 0;
+	len = hlen + sizeof(iplci) + mlen;
+	if (iplused + len > LOGSIZE)
+		return 0;
+	iplused += len;
+
+# ifdef	sun
+	uniqtime(&iplci);
+# endif
+# if BSD >= 199306 || defined(__FreeBSD__)
+	microtime((struct timeval *)&iplci);
+# endif
+	iplci.flags = flags;
+	iplci.hlen = (u_char)hlen;
+	iplci.plen = (u_char)mlen;
+	iplci.rule = fin->fin_rule;
+# if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
+	strncpy(iplci.ifname, ifp->if_xname, IFNAMSIZ);
+# else
+	iplci.unit = (u_char)ifp->if_unit;
+	if ((iplci.ifname[0] = ifp->if_name[0]))
+		if ((iplci.ifname[1] = ifp->if_name[1]))
+			if ((iplci.ifname[2] = ifp->if_name[2]))
+				iplci.ifname[3] = ifp->if_name[3];
+# endif
+	/*      
+	 * Gauranteed to succeed from above
+	 */     
+	(void) fr_copytolog(&iplci, sizeof(iplci));
+
+	for (len -= sizeof(iplci); m && len > 0; m = m->m_next, len -= hlen) {
+		hlen = MIN(len, m->m_len);
+		if (fr_copytolog(mtod(m, char *), hlen))
+			break;
+	}
+
+	wakeup(iplbuf);
+	return 1;
+}
+#endif /* IPFILTER_LOG */
+
+/*
+ * send_reset - this could conceivably be a call to tcp_respond(), but that
+ * requires a large amount of setting up and isn't any more efficient.
+ */
+int send_reset(ti)
+struct tcpiphdr *ti;
+{
+	struct tcpiphdr *tp;
+	struct ip *ip;
+	struct tcphdr *tcp;
+	struct mbuf *m;
+	int tlen = 0;
+
+	if (ti->ti_flags & TH_RST)
+		return -1;		/* feedback loop */
+#if	BSD < 199306
+	m = m_get(M_DONTWAIT, MT_HEADER);
+#else
+	m = m_gethdr(M_DONTWAIT, MT_HEADER);
+	m->m_data += max_linkhdr;
+#endif
+	if (m == NULL)
+		return -1;
+
+	if (ti->ti_flags & TH_SYN)
+		tlen = 1;
+	m->m_len = sizeof (struct tcpiphdr);
+#if	BSD >= 199306
+	m->m_pkthdr.len = sizeof (struct tcpiphdr);
+	m->m_pkthdr.rcvif = (struct ifnet *)0;
+#endif
+	bzero(mtod(m, char *), sizeof(struct tcpiphdr));
+	ip = mtod(m, struct ip *);
+	tp = mtod(m, struct tcpiphdr *);
+	tcp = (struct tcphdr *)((char *)ip + sizeof(struct ip));
+
+	ip->ip_src.s_addr = ti->ti_dst.s_addr;
+	ip->ip_dst.s_addr = ti->ti_src.s_addr;
+	tcp->th_dport = ti->ti_sport;
+	tcp->th_sport = ti->ti_dport;
+	tcp->th_ack = htonl(ntohl(ti->ti_seq) + tlen);
+	tcp->th_off = sizeof(struct tcphdr) >> 2;
+	tcp->th_flags = TH_RST|TH_ACK;
+	tp->ti_pr = ((struct ip *)ti)->ip_p;
+	tp->ti_len = htons(sizeof(struct tcphdr));
+	tcp->th_sum = in_cksum(m, sizeof(struct tcpiphdr));
+
+	ip->ip_tos = ((struct ip *)ti)->ip_tos;
+	ip->ip_p = ((struct ip *)ti)->ip_p;
+	ip->ip_len = sizeof (struct tcpiphdr);
+#if BSD < 199306
+	ip->ip_ttl = tcp_ttl;
+#else
+	ip->ip_ttl = ip_defttl;
+#endif
+
+	/*
+	 * extra 0 in case of multicast
+	 */
+	(void) ip_output(m, (struct mbuf *)0, 0, 0, 0);
+	return 0;
+}
+
+
+#ifndef	IPFILTER_LKM
+void iplinit()
+{
+	(void) iplattach();
+	ip_init();
+}
+#endif
+
+
+void ipfr_fastroute(m0, fin, fdp)
+struct mbuf *m0;
+fr_info_t *fin;
+frdest_t *fdp;
+{
+	register struct ip *ip, *mhip;
+	register struct mbuf *m = m0;
+	register struct route *ro;
+	struct ifnet *ifp = fdp->fd_ifp;
+	int len, off, error = 0;
+	int hlen = fin->fin_hlen;
+	struct route iproute;
+	struct sockaddr_in *dst;
+
+	ip = mtod(m0, struct ip *);
+	/*
+	 * Route packet.
+	 */
+	ro = &iproute;
+	bzero((caddr_t)ro, sizeof (*ro));
+	dst = (struct sockaddr_in *)&ro->ro_dst;
+	dst->sin_family = AF_INET;
+	dst->sin_addr = fdp->fd_ip.s_addr ? fdp->fd_ip : ip->ip_dst;
+#if	(BSD >= 199306) && !defined(__NetBSD__) && !defined(__bsdi__)
+# ifdef	RTF_CLONING
+	rtalloc_ign(ro, RTF_CLONING);
+# else
+	rtalloc_ign(ro, RTF_PRCLONING);
+# endif
+#else
+	rtalloc(ro);
+#endif
+	if (!ifp) {
+		if (!(fin->fin_fr->fr_flags & FR_FASTROUTE)) {
+			error = -2;
+			goto bad;
+		}
+		if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
+			if (in_localaddr(ip->ip_dst))
+				error = EHOSTUNREACH;
+			else
+				error = ENETUNREACH;
+			goto bad;
+		}
+		if (ro->ro_rt->rt_flags & RTF_GATEWAY)
+			dst = (struct sockaddr_in *)&ro->ro_rt->rt_gateway;
+	}
+	ro->ro_rt->rt_use++;
+
+	/*
+	 * For input packets which are being "fastrouted", they won't
+	 * go back through output filtering and miss their chance to get
+	 * NAT'd.
+	 */
+	(void) ip_natout(ip, hlen, fin);
+	if (fin->fin_out)
+		ip->ip_sum = 0;
+	/*
+	 * If small enough for interface, can just send directly.
+	 */
+	if (ip->ip_len <= ifp->if_mtu) {
+#ifndef sparc
+		ip->ip_id = htons(ip->ip_id);
+		ip->ip_len = htons(ip->ip_len);
+		ip->ip_off = htons(ip->ip_off);
+#endif
+		if (!ip->ip_sum)
+			ip->ip_sum = in_cksum(m, hlen);
+#if	BSD >= 199306
+		error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst,
+					  ro->ro_rt);
+
+#else
+		error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst);
+#endif
+		goto done;
+	}
+	/*
+	 * Too large for interface; fragment if possible.
+	 * Must be able to put at least 8 bytes per fragment.
+	 */
+	if (ip->ip_off & IP_DF) {
+		error = EMSGSIZE;
+		goto bad;
+	}
+	len = (ifp->if_mtu - hlen) &~ 7;
+	if (len < 8) {
+		error = EMSGSIZE;
+		goto bad;
+	}
+
+    {
+	int mhlen, firstlen = len;
+	struct mbuf **mnext = &m->m_act;
+
+	/*
+	 * Loop through length of segment after first fragment,
+	 * make new header and copy data of each part and link onto chain.
+	 */
+	m0 = m;
+	mhlen = sizeof (struct ip);
+	for (off = hlen + len; off < ip->ip_len; off += len) {
+		MGET(m, M_DONTWAIT, MT_HEADER);
+		if (m == 0) {
+			error = ENOBUFS;
+			goto bad;
+		}
+#if BSD >= 199306
+		m->m_data += max_linkhdr;
+#else
+		m->m_off = MMAXOFF - hlen;
+#endif
+		mhip = mtod(m, struct ip *);
+		bcopy((char *)ip, (char *)mhip, sizeof(*ip));
+		if (hlen > sizeof (struct ip)) {
+			mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip);
+			mhip->ip_hl = mhlen >> 2;
+		}
+		m->m_len = mhlen;
+		mhip->ip_off = ((off - hlen) >> 3) + (ip->ip_off & ~IP_MF);
+		if (ip->ip_off & IP_MF)
+			mhip->ip_off |= IP_MF;
+		if (off + len >= ip->ip_len)
+			len = ip->ip_len - off;
+		else
+			mhip->ip_off |= IP_MF;
+		mhip->ip_len = htons((u_short)(len + mhlen));
+		m->m_next = m_copy(m0, off, len);
+		if (m->m_next == 0) {
+			error = ENOBUFS;	/* ??? */
+			goto sendorfree;
+		}
+#ifndef sparc
+		mhip->ip_off = htons((u_short)mhip->ip_off);
+#endif
+		mhip->ip_sum = 0;
+		mhip->ip_sum = in_cksum(m, mhlen);
+		*mnext = m;
+		mnext = &m->m_act;
+	}
+	/*
+	 * Update first fragment by trimming what's been copied out
+	 * and updating header, then send each fragment (in order).
+	 */
+	m_adj(m0, hlen + firstlen - ip->ip_len);
+	ip->ip_len = htons((u_short)(hlen + firstlen));
+	ip->ip_off = htons((u_short)(ip->ip_off | IP_MF));
+	ip->ip_sum = 0;
+	ip->ip_sum = in_cksum(m0, hlen);
+sendorfree:
+	for (m = m0; m; m = m0) {
+		m0 = m->m_act;
+		m->m_act = 0;
+		if (error == 0)
+#if BSD >= 199306
+			error = (*ifp->if_output)(ifp, m,
+			    (struct sockaddr *)dst, ro->ro_rt);
+#else
+			error = (*ifp->if_output)(ifp, m,
+			    (struct sockaddr *)dst);
+#endif
+		else
+			m_freem(m);
+	}
+    }	
+done:
+	if (ro->ro_rt) {
+		RTFREE(ro->ro_rt);
+	}
+	return;
+bad:
+	m_freem(m);
+	goto done;
+}
diff --git a/contrib/ipfilter/ip_fil.h b/contrib/ipfilter/ip_fil.h
new file mode 100644
index 0000000..389a161
--- /dev/null
+++ b/contrib/ipfilter/ip_fil.h
@@ -0,0 +1,293 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ip_fil.h	1.35 6/5/96
+ * $Id: ip_fil.h,v 2.0.1.2 1997/01/10 00:28:15 darrenr Exp $
+ */
+
+#ifndef	__IP_FIL_H__
+#define	__IP_FIL_H__
+
+#ifndef	SOLARIS
+#define	SOLARIS	(defined(sun) && (defined(__svr4__) || defined(__SVR4)))
+#endif
+
+#if defined(KERNEL) && !defined(_KERNEL)
+#define	_KERNEL
+#endif
+#if SOLARIS
+# include <sys/ioccom.h>
+# include <sys/sysmacros.h>
+# ifdef	_KERNEL
+#  include <inet/common.h>
+/*
+ * because Solaris 2 defines these in two places :-/
+ */
+#undef	IPOPT_EOL
+#undef	IPOPT_NOP
+#undef	IPOPT_LSRR
+#undef	IPOPT_RR
+#undef	IPOPT_SSRR
+#  include <inet/ip.h>
+# endif
+#endif
+
+#if defined(__STDC__) || defined(__GNUC__)
+#define	SIOCADAFR	_IOW('r', 60, struct frentry)
+#define	SIOCRMAFR	_IOW('r', 61, struct frentry)
+#define	SIOCSETFF	_IOW('r', 62, u_int)
+#define	SIOCGETFF	_IOR('r', 63, u_int)
+#define	SIOCGETFS	_IOR('r', 64, struct friostat)
+#define	SIOCIPFFL	_IOWR('r', 65, int)
+#define	SIOCIPFFB	_IOR('r', 66, int)
+#define	SIOCADIFR	_IOW('r', 67, struct frentry)
+#define	SIOCRMIFR	_IOW('r', 68, struct frentry)
+#define	SIOCSWAPA	_IOR('r', 69, u_int)
+#define	SIOCINAFR	_IOW('r', 70, struct frentry)
+#define	SIOCINIFR	_IOW('r', 71, struct frentry)
+#define	SIOCFRENB	_IOW('r', 72, u_int)
+#define	SIOCFRSYN	_IOW('r', 73, u_int)
+#define	SIOCFRZST	_IOWR('r', 74, struct friostat)
+#define	SIOCZRLST	_IOWR('r', 75, struct frentry)
+#else
+#define	SIOCADAFR	_IOW(r, 60, struct frentry)
+#define	SIOCRMAFR	_IOW(r, 61, struct frentry)
+#define	SIOCSETFF	_IOW(r, 62, u_int)
+#define	SIOCGETFF	_IOR(r, 63, u_int)
+#define	SIOCGETFS	_IOR(r, 64, struct friostat)
+#define	SIOCIPFFL	_IOWR(r, 65, int)
+#define	SIOCIPFFB	_IOR(r, 66, int)
+#define	SIOCADIFR	_IOW(r, 67, struct frentry)
+#define	SIOCRMIFR	_IOW(r, 68, struct frentry)
+#define	SIOCSWAPA	_IOR(r, 69, u_int)
+#define	SIOCINAFR	_IOW(r, 70, struct frentry)
+#define	SIOCINIFR	_IOW(r, 71, struct frentry)
+#define SIOCFRENB	_IOW(r, 72, u_int)
+#define	SIOCFRSYN	_IOW(r, 73, u_int)
+#define	SIOCFRZST	_IOWR(r, 74, struct friostat)
+#define	SIOCZRLST	_IOWR(r, 75, struct frentry)
+#endif
+#define	SIOCADDFR	SIOCADAFR
+#define	SIOCDELFR	SIOCRMAFR
+#define	SIOCINSFR	SIOCINAFR
+
+typedef	struct	fr_ip	{
+	u_char	fi_v:4;		/* IP version */
+	u_char	fi_fl:4;	/* packet flags */
+	u_char	fi_tos;
+	u_char	fi_ttl;
+	u_char	fi_p;
+	struct	in_addr	fi_src;
+	struct	in_addr	fi_dst;
+	u_long	fi_optmsk;	/* bitmask composed from IP options */
+	u_short	fi_secmsk;	/* bitmask composed from IP security options */
+	u_short	fi_auth;
+} fr_ip_t;
+
+#define	FI_OPTIONS	0x01
+#define	FI_TCPUDP	0x02	/* TCP/UCP implied comparison involved */
+#define	FI_FRAG		0x04
+#define	FI_SHORT	0x08
+
+typedef	struct	fr_info	{
+	struct	fr_ip	fin_fi;
+	void	*fin_ifp;
+	u_short	fin_data[2];
+	u_short	fin_out;
+	u_char	fin_tcpf;
+	u_char	fin_icode;
+	u_short	fin_rule;
+	u_short	fin_hlen;
+	u_short	fin_dlen;
+	char	*fin_dp;		/* start of data past IP header */
+	struct	frentry *fin_fr;
+} fr_info_t;
+
+#define	FI_CSIZE	(sizeof(struct fr_ip) + 11)
+
+typedef	struct	frdest	{
+	void	*fd_ifp;
+	struct	in_addr	fd_ip;
+	char	fd_ifname[IFNAMSIZ];
+} frdest_t;
+
+typedef	struct	frentry {
+	struct	frentry	*fr_next;
+	struct	ifnet	*fr_ifa;
+	u_long	fr_hits;
+	u_long	fr_bytes;	/* this is only incremented when a packet */
+				/* matches this rule and it is the last match*/
+	/*
+	 * Fields after this may not change whilst in the kernel.
+	 */
+	struct	fr_ip	fr_ip;
+	struct	fr_ip	fr_mip;	/* mask structure */
+
+	u_char	fr_tcpfm;	/* tcp flags mask */
+	u_char	fr_tcpf;	/* tcp flags */
+
+	u_short	fr_icmpm;	/* data for ICMP packets (mask) */
+	u_short	fr_icmp;
+
+	u_char	fr_scmp;	/* data for port comparisons */
+	u_char	fr_dcmp;
+	u_short	fr_dport;
+	u_short	fr_sport;
+	u_short	fr_stop;	/* top port for <> and >< */
+	u_short	fr_dtop;	/* top port for <> and >< */
+	u_long	fr_flags;	/* per-rule flags && options (see below) */
+	int	(*fr_func)();	/* call this function */
+	char	fr_icode;	/* return ICMP code */
+	char	fr_ifname[IFNAMSIZ];
+	struct	frdest	fr_tif;	/* "to" interface */
+	struct	frdest	fr_dif;	/* duplicate packet interfaces */
+} frentry_t;
+
+#define	fr_proto	fr_ip.fi_p
+#define	fr_ttl		fr_ip.fi_ttl
+#define	fr_tos		fr_ip.fi_tos
+#define	fr_dst		fr_ip.fi_dst
+#define	fr_src		fr_ip.fi_src
+#define	fr_dmsk		fr_mip.fi_dst
+#define	fr_smsk		fr_mip.fi_src
+
+#ifndef	offsetof
+#define	offsetof(t,m)	(int)((&((t *)0L)->m))
+#endif
+#define	FR_CMPSIZ	(sizeof(struct frentry) - offsetof(frentry_t, fr_ip))
+
+/*
+ * fr_flags
+*/
+#define	FR_BLOCK	0x00001
+#define	FR_PASS		0x00002
+#define	FR_OUTQUE	0x00004
+#define	FR_INQUE	0x00008
+#define	FR_LOG		0x00010	/* Log */
+#define	FR_LOGB		0x00011	/* Log-fail */
+#define	FR_LOGP		0x00012	/* Log-pass */
+#define	FR_LOGBODY	0x00020	/* Log the body */
+#define	FR_LOGFIRST	0x00040	/* Log the first byte if state held */
+#define	FR_RETRST	0x00080	/* Return TCP RST packet - reset connection */
+#define	FR_RETICMP	0x00100	/* Return ICMP unreachable packet */
+#define	FR_NOMATCH	0x00200
+#define	FR_ACCOUNT	0x00400	/* count packet bytes */
+#define	FR_KEEPFRAG	0x00800	/* keep fragment information */
+#define	FR_KEEPSTATE	0x01000	/* keep `connection' state information */
+#define	FR_INACTIVE	0x02000
+#define	FR_QUICK	0x04000	/* match & stop processing list */
+#define	FR_FASTROUTE	0x08000	/* bypass normal routing */
+#define	FR_CALLNOW	0x10000	/* call another function (fr_func) if matches */
+#define	FR_DUP		0x20000	/* duplicate packet */
+#define	FR_LOGORBLOCK	0x40000	/* block the packet if it can't be logged */
+
+#define	FR_LOGMASK	(FR_LOG|FR_LOGP|FR_LOGB)
+/*
+ * recognized flags for SIOCGETFF and SIOCSETFF
+ */
+#define	FF_LOGPASS	0x100000
+#define	FF_LOGBLOCK	0x200000
+#define	FF_LOGNOMATCH	0x400000
+#define	FF_LOGGING	(FF_LOGPASS|FF_LOGBLOCK|FF_LOGNOMATCH)
+#define	FF_BLOCKNONIP	0x800000	/* Solaris2 Only */
+
+#define	FR_NONE 0
+#define	FR_EQUAL 1
+#define	FR_NEQUAL 2
+#define FR_LESST 3
+#define FR_GREATERT 4
+#define FR_LESSTE 5
+#define FR_GREATERTE 6
+#define	FR_OUTRANGE 7
+#define	FR_INRANGE 8
+
+typedef	struct	filterstats {
+	u_long	fr_pass;	/* packets allowed */
+	u_long	fr_block;	/* packets denied */
+	u_long	fr_nom;		/* packets which don't match any rule */
+	u_long	fr_ppkl;	/* packets allowed and logged */
+	u_long	fr_bpkl;	/* packets denied and logged */
+	u_long	fr_npkl;	/* packets unmatched and logged */
+	u_long	fr_pkl;		/* packets logged */
+	u_long	fr_skip;	/* packets to be logged but buffer full */
+	u_long	fr_ret;		/* packets for which a return is sent */
+	u_long	fr_acct;	/* packets for which counting was performed */
+	u_long	fr_bnfr;	/* bad attempts to allocate fragment state */
+	u_long	fr_nfr;		/* new fragment state kept */
+	u_long	fr_cfr;		/* add new fragment state but complete pkt */
+	u_long	fr_bads;	/* bad attempts to allocate packet state */
+	u_long	fr_ads;		/* new packet state kept */
+	u_long	fr_chit;	/* cached hit */
+	u_long	fr_pull[2];	/* good and bad pullup attempts */
+#if SOLARIS
+	u_long	fr_bad;		/* bad IP packets to the filter */
+	u_long	fr_notip;	/* packets passed through no on ip queue */
+	u_long	fr_drop;	/* packets dropped - no info for them! */
+#endif
+} filterstats_t;
+
+/*
+ * For SIOCGETFS
+ */
+typedef	struct	friostat	{
+	struct	filterstats	f_st[2];
+	struct	frentry		*f_fin[2];
+	struct	frentry		*f_fout[2];
+	struct	frentry		*f_acctin[2];
+	struct	frentry		*f_acctout[2];
+	int	f_active;
+} friostat_t;
+
+typedef struct  optlist {
+	u_short ol_val;
+	int     ol_bit;
+} optlist_t;
+
+/*
+ * Log structure.  Each packet header logged is prepended by one of these,
+ * minimize size to make most effective use of log space which should
+ * (ideally) be a muliple of the most common log entry size.
+ */
+typedef	struct ipl_ci	{
+	u_long	sec;
+	u_long	usec;
+	u_char	hlen;
+	u_char	plen;
+	u_short	rule;		/* assume never more than 64k rules, total */
+#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
+	u_long	flags;
+	u_char	ifname[IFNAMSIZ];	/* = 32 bytes */
+#else
+	u_long	flags:24;
+	u_long	unit:8;
+	u_char	ifname[4];	/* = 20 bytes */
+#endif
+} ipl_ci_t;
+
+
+#ifndef	ICMP_UNREACH_FILTER
+#define	ICMP_UNREACH_FILTER	13
+#endif
+
+#define	IPMINLEN(i, h)	((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))
+#define	IPLLOGSIZE	8192
+
+extern	int	fr_check();
+extern	int	fr_copytolog();
+extern	fr_info_t	frcache[];
+extern	char	*iplh, *iplt;
+extern	char	iplbuf[IPLLOGSIZE];
+
+#ifdef _KERNEL
+
+extern struct frentry *ipfilter[2][2], *ipacct[2][2];
+extern struct filterstats frstats[];
+# if	SOLARIS
+extern	int	ipfsync();
+# endif
+#endif /* _KERNEL */
+#endif	/* __IP_FIL_H__ */
diff --git a/contrib/ipfilter/ip_frag.c b/contrib/ipfilter/ip_frag.c
new file mode 100644
index 0000000..6665404
--- /dev/null
+++ b/contrib/ipfilter/ip_frag.c
@@ -0,0 +1,278 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ip_frag.c	1.11 3/24/96 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: ip_frag.c,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $";
+#endif
+
+#if !defined(_KERNEL) && !defined(KERNEL)
+# include <string.h>
+# include <stdlib.h>
+#endif
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#ifdef	_KERNEL
+# include <sys/systm.h>
+#endif
+#if !defined(__SVR4) && !defined(__svr4__)
+# include <sys/mbuf.h>
+#else
+# include <sys/byteorder.h>
+# include <sys/dditypes.h>
+# include <sys/stream.h>
+# include <sys/kmem.h>
+#endif
+
+#include <net/if.h>
+#ifdef sun
+#include <net/af.h>
+#endif
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_frag.h"
+#include "ip_nat.h"
+#include "ip_state.h"
+
+ipfr_t	*ipfr_heads[IPFT_SIZE];
+ipfrstat_t ipfr_stats;
+u_long	ipfr_inuse = 0,
+	fr_ipfrttl = 120;	/* 60 seconds */
+#ifdef _KERNEL
+extern	int	ipfr_timer_id;
+#endif
+#if	SOLARIS
+# ifdef	_KERNEL
+extern	kmutex_t	ipf_frag;
+# else
+#define	bcmp(a,b,c)	memcmp(a,b,c)
+#define	bcopy(a,b,c)	memmove(b,a,c)
+# endif
+#endif
+
+
+ipfrstat_t *ipfr_fragstats()
+{
+	ipfr_stats.ifs_table = ipfr_heads;
+	ipfr_stats.ifs_inuse = ipfr_inuse;
+	return &ipfr_stats;
+}
+
+
+/*
+ * add a new entry to the fragment cache, registering it as having come
+ * through this box, with the result of the filter operation.
+ */
+int ipfr_newfrag(ip, fin, pass)
+ip_t *ip;
+fr_info_t *fin;
+int pass;
+{
+	ipfr_t	**fp, *fr, frag;
+	u_int	idx;
+
+	frag.ipfr_p = ip->ip_p;
+	idx = ip->ip_p;
+	frag.ipfr_id = ip->ip_id;
+	idx += ip->ip_id;
+	frag.ipfr_tos = ip->ip_tos;
+	frag.ipfr_src.s_addr = ip->ip_src.s_addr;
+	idx += ip->ip_src.s_addr;
+	frag.ipfr_dst.s_addr = ip->ip_dst.s_addr;
+	idx += ip->ip_dst.s_addr;
+	idx *= 127;
+	idx %= IPFT_SIZE;
+
+	/*
+	 * first, make sure it isn't already there...
+	 */
+	MUTEX_ENTER(&ipf_frag);
+	for (fp = &ipfr_heads[idx]; (fr = *fp); fp = &fr->ipfr_next)
+		if (!bcmp((char *)&frag.ipfr_src, (char *)&fr->ipfr_src,
+			  IPFR_CMPSZ)) {
+			ipfr_stats.ifs_exists++;
+			MUTEX_EXIT(&ipf_frag);
+			return -1;
+		}
+
+	if (!(fr = (ipfr_t *)KMALLOC(sizeof(*fr)))) {
+		ipfr_stats.ifs_nomem++;
+		MUTEX_EXIT(&ipf_frag);
+		return -1;
+	}
+	if ((fr->ipfr_next = ipfr_heads[idx]))
+		ipfr_heads[idx]->ipfr_prev = fr;
+	fr->ipfr_prev = NULL;
+	ipfr_heads[idx] = fr;
+	bcopy((char *)&frag.ipfr_src, (char *)&fr->ipfr_src, IPFR_CMPSZ);
+	fr->ipfr_ttl = fr_ipfrttl;
+	fr->ipfr_pass = pass & ~(FR_LOGFIRST|FR_LOG);
+	fr->ipfr_off = (ip->ip_off & 0x1fff) + (fin->fin_dlen >> 3);
+	*fp = fr;
+	ipfr_stats.ifs_new++;
+	ipfr_inuse++;
+	MUTEX_EXIT(&ipf_frag);
+	return 0;
+}
+
+
+/*
+ * check the fragment cache to see if there is already a record of this packet
+ * with its filter result known.
+ */
+int ipfr_knownfrag(ip, fin)
+ip_t *ip;
+fr_info_t *fin;
+{
+	ipfr_t	*f, frag;
+	u_int	idx;
+	int	ret;
+
+	/*
+	 * For fragments, we record protocol, packet id, TOS and both IP#'s
+	 * (these should all be the same for all fragments of a packet).
+	 */
+	frag.ipfr_p = ip->ip_p;
+	idx = ip->ip_p;
+	frag.ipfr_id = ip->ip_id;
+	idx += ip->ip_id;
+	frag.ipfr_tos = ip->ip_tos;
+	frag.ipfr_src.s_addr = ip->ip_src.s_addr;
+	idx += ip->ip_src.s_addr;
+	frag.ipfr_dst.s_addr = ip->ip_dst.s_addr;
+	idx += ip->ip_dst.s_addr;
+	idx *= 127;
+	idx %= IPFT_SIZE;
+
+	MUTEX_ENTER(&ipf_frag);
+	for (f = ipfr_heads[idx]; f; f = f->ipfr_next)
+		if (!bcmp((char *)&frag.ipfr_src, (char *)&f->ipfr_src,
+			  IPFR_CMPSZ)) {
+			u_short	atoff, off;
+
+			if (f != ipfr_heads[idx]) {
+				/*
+				 * move fragment info. to the top of the list
+				 * to speed up searches.
+				 */
+				if ((f->ipfr_prev->ipfr_next = f->ipfr_next))
+					f->ipfr_next->ipfr_prev = f->ipfr_prev;
+				f->ipfr_next = ipfr_heads[idx];
+				ipfr_heads[idx]->ipfr_prev = f;
+				f->ipfr_prev = NULL;
+				ipfr_heads[idx] = f;
+			}
+			ret = f->ipfr_pass;
+			off = ip->ip_off;
+			atoff = (off & 0x1fff) - (fin->fin_dlen >> 3);
+			/*
+			 * If we've follwed the fragments, and this is the
+			 * last (in order), shrink expiration time.
+			 */
+			if (atoff == f->ipfr_off) {
+				if (!(off & IP_MF))
+					f->ipfr_ttl = 1;
+				else
+					f->ipfr_off = off;
+			}
+			ipfr_stats.ifs_hits++;
+			MUTEX_EXIT(&ipf_frag);
+			return ret;
+		}
+	MUTEX_EXIT(&ipf_frag);
+	return 0;
+}
+
+
+/*
+ * Free memory in use by fragment state info. kept.
+ */
+void ipfr_unload()
+{
+	ipfr_t	**fp, *fr;
+	int	idx;
+#if	!SOLARIS && defined(_KERNEL)
+	int	s;
+#endif
+
+	MUTEX_ENTER(&ipf_frag);
+	SPLNET(s);
+	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
+		for (fp = &ipfr_heads[idx]; (fr = *fp); ) {
+			*fp = fr->ipfr_next;
+			KFREE(fr);
+		}
+	SPLX(s);
+	MUTEX_EXIT(&ipf_frag);
+}
+
+
+#ifdef	_KERNEL
+/*
+ * Slowly expire held state for fragments.  Timeouts are set * in expectation
+ * of this being called twice per second.
+ */
+# if BSD < 199306
+int ipfr_slowtimer()
+# else
+void ipfr_slowtimer()
+# endif
+{
+	ipfr_t	**fp, *fr;
+	int	s, idx;
+
+	MUTEX_ENTER(&ipf_frag);
+	SPLNET(s);
+
+	for (idx = IPFT_SIZE - 1; idx >= 0; idx--)
+		for (fp = &ipfr_heads[idx]; (fr = *fp); ) {
+			--fr->ipfr_ttl;
+			if (fr->ipfr_ttl == 0) {
+				if (fr->ipfr_prev)
+					fr->ipfr_prev->ipfr_next =
+					     fr->ipfr_next;
+				if (fr->ipfr_next)
+					fr->ipfr_next->ipfr_prev =
+					     fr->ipfr_prev;
+				*fp = fr->ipfr_next;
+				ipfr_stats.ifs_expire++;
+				ipfr_inuse--;
+				KFREE(fr);
+			} else
+				fp = &fr->ipfr_next;
+		}
+	SPLX(s);
+# if	SOLARIS
+	MUTEX_EXIT(&ipf_frag);
+	fr_timeoutstate();
+	ip_natexpire();
+	ipfr_timer_id = timeout(ipfr_slowtimer, NULL, HZ/2);
+# else
+	fr_timeoutstate();
+	ip_natexpire();
+	ip_slowtimo();
+#  if BSD < 199306
+	return 0;
+#  endif
+# endif
+}
+#endif /* defined(_KERNEL) */
diff --git a/contrib/ipfilter/ip_frag.h b/contrib/ipfilter/ip_frag.h
new file mode 100644
index 0000000..a356785
--- /dev/null
+++ b/contrib/ipfilter/ip_frag.h
@@ -0,0 +1,47 @@
+/*
+ * (C)opyright 1993, 1994, 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ip_frag.h	1.5 3/24/96
+ * $Id: ip_frag.h,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $
+ */
+
+#ifndef	__IP_FRAG_H_
+#define	__IP_FRAG_H__
+
+#define	IPFT_SIZE	257
+
+typedef	struct	ipfr	{
+	struct	ipfr	*ipfr_next, *ipfr_prev;
+	struct	in_addr	ipfr_src;
+	struct	in_addr	ipfr_dst;
+	u_short	ipfr_id;
+	u_char	ipfr_p;
+	u_char	ipfr_tos;
+	u_short	ipfr_off;
+	u_short	ipfr_ttl;
+	u_char	ipfr_pass;
+} ipfr_t;
+
+
+typedef	struct	ipfrstat {
+	u_long	ifs_exists;	/* add & already exists */
+	u_long	ifs_nomem;
+	u_long	ifs_new;
+	u_long	ifs_hits;
+	u_long	ifs_expire;
+	u_long	ifs_inuse;
+	struct	ipfr	**ifs_table;
+} ipfrstat_t;
+
+#define	IPFR_CMPSZ	(4 + 4 + 2 + 1 + 1)
+
+extern ipfrstat_t *ipfr_fragstats();
+extern int ipfr_newfrag(), ipfr_knownfrag();
+# ifdef	_KERNEL
+extern void ipfr_unload();
+# endif
+#endif	/* __IP_FIL_H__ */
diff --git a/contrib/ipfilter/ip_nat.c b/contrib/ipfilter/ip_nat.c
new file mode 100644
index 0000000..afe9761
--- /dev/null
+++ b/contrib/ipfilter/ip_nat.c
@@ -0,0 +1,886 @@
+/*
+ * (C)opyright 1995-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * Added redirect stuff and a LOT of bug fixes. (mcn@EnGarde.com)
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ip_nat.c	1.11 6/5/96 (C) 1995 Darren Reed";
+static	char	rcsid[] = "$Id: ip_nat.c,v 2.0.1.10 1997/02/08 06:38:49 darrenr Exp $";
+#endif
+
+#if !defined(_KERNEL) && !defined(KERNEL)
+# include <stdio.h>
+# include <string.h>
+# include <stdlib.h>
+#endif
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#ifdef	_KERNEL
+# include <sys/systm.h>
+#endif
+#if !defined(__SVR4) && !defined(__svr4__)
+# include <sys/mbuf.h>
+#else
+# include <sys/byteorder.h>
+# include <sys/dditypes.h>
+# include <sys/stream.h>
+# include <sys/kmem.h>
+#endif
+
+#include <net/if.h>
+#ifdef sun
+#include <net/af.h>
+#endif
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+
+#ifdef RFC1825
+#include <vpn/md5.h>
+#include <vpn/ipsec.h>
+extern struct ifnet vpnif;
+#endif
+
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_nat.h"
+#include "ip_state.h"
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+nat_t	*nat_table[2][NAT_SIZE], *nat_instances = NULL;
+ipnat_t	*nat_list = NULL;
+u_long	nat_inuse = 0,
+	fr_defnatage = 1200;
+natstat_t nat_stats;
+#if	SOLARIS
+# ifndef	_KERNEL
+#define	bzero(a,b)	memset(a,0,b)
+#define	bcmp(a,b,c)	memcpy(a,b,c)
+#define	bcopy(a,b,c)	memmove(b,a,c)
+# else
+extern	kmutex_t	ipf_nat;
+# endif
+#endif
+
+static	int	flush_nattable(), clear_natlist();
+static	void	nattable_sync();
+
+void fix_outcksum(sp, n)
+u_short *sp;
+u_long n;
+{
+	register u_short sumshort;
+	register u_long sum1;
+
+#ifdef sparc
+	sum1 = (~(*sp)) & 0xffff;
+#else
+	sum1 = (~ntohs(*sp)) & 0xffff;
+#endif
+	sum1 += (n);
+	sum1 = (sum1 >> 16) + (sum1 & 0xffff);
+	/* Again */
+	sum1 = (sum1 >> 16) + (sum1 & 0xffff);
+	sumshort = ~(u_short)sum1;
+	*(sp) = htons(sumshort);
+}
+
+
+void fix_incksum(sp, n)
+u_short *sp;
+u_long n;
+{
+	register u_short sumshort;
+	register u_long sum1;
+
+#ifdef sparc
+	sum1 = (~(*sp)) & 0xffff;
+#else
+	sum1 = (~ntohs(*sp)) & 0xffff;
+#endif
+	sum1 += ~(n) & 0xffff;
+	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)
+ * -------------------- -+- -------------------------------------
+ * Packet going          |   out, processsed by ip_natout() for x
+ * ------------>         |   ------------>
+ * src=10.1.1.1          |   src=192.1.1.1
+ *                       |
+ *                       |   in, processed by ip_natin() for x
+ * <------------         |   <------------
+ * dst=10.1.1.1          |   dst=192.1.1.1
+ * -------------------- -+- -------------------------------------
+ * ip_natout() - changes ip_src and if required, sport
+ *             - creates a new mapping, if required.
+ * ip_natin()  - changes ip_dst and if required, dport
+ *
+ * In the NAT table, internal source is recorded as "in" and externally
+ * seen as "out".
+ */
+
+/*
+ * Handle ioctls which manipulate the NAT.
+ */
+int nat_ioctl(data, cmd, mode)
+caddr_t data;
+int cmd, mode;
+{
+	register ipnat_t *nat, *n = NULL, **np = NULL;
+	ipnat_t natd;
+	int error = 0, ret;
+
+	/*
+	 * For add/delete, look to see if the NAT entry is already present
+	 */
+	MUTEX_ENTER(&ipf_nat);
+	if ((cmd == SIOCADNAT) || (cmd == SIOCRMNAT)) {
+		IRCOPY(data, (char *)&natd, sizeof(natd));
+		nat = &natd;
+		for (np = &nat_list; (n = *np); np = &n->in_next)
+			if (!bcmp((char *)&nat->in_flags, (char *)&n->in_flags,
+					IPN_CMPSIZ))
+				break;
+	}
+
+	switch (cmd)
+	{
+	case SIOCADNAT :
+		if (!(mode & FWRITE)) {
+			error = EPERM;
+			break;
+		}
+		if (n) {
+			error = EEXIST;
+			break;
+		}
+		if (!(n = (ipnat_t *)KMALLOC(sizeof(*n)))) {
+			error = ENOMEM;
+			break;
+		}
+		IRCOPY((char *)data, (char *)n, sizeof(*n));
+		n->in_ifp = (void *)GETUNIT(n->in_ifname);
+		n->in_next = *np;
+		n->in_use = 0;
+		n->in_space = ~(0xffffffff & ntohl(n->in_outmsk));
+		if (n->in_space) /* lose 2: broadcast + network address */
+			n->in_space -= 2;
+		else
+			n->in_space = 1;	/* single IP# mapping */
+		if (n->in_outmsk != 0xffffffff)
+			n->in_nip = ntohl(n->in_outip) + 1;
+		else
+			n->in_nip = ntohl(n->in_outip);
+		if (n->in_redir == NAT_MAP) {
+			n->in_pnext = ntohs(n->in_pmin);
+			/*
+			 * Multiply by the number of ports made available.
+			 */
+			if (ntohs(n->in_pmax) > ntohs(n->in_pmin))
+				n->in_space *= (ntohs(n->in_pmax) -
+						ntohs(n->in_pmin));
+		}
+		/* Otherwise, these fields are preset */
+		*np = n;
+		break;
+	case SIOCRMNAT :
+		if (!(mode & FWRITE)) {
+			error = EPERM;
+			break;
+		}
+		if (!n) {
+			error = ESRCH;
+			break;
+		}
+		*np = n->in_next;
+
+		KFREE(n);
+		nattable_sync();
+		break;
+	case SIOCGNATS :
+		nat_stats.ns_table[0] = nat_table[0];
+		nat_stats.ns_table[1] = nat_table[1];
+		nat_stats.ns_list = nat_list;
+		nat_stats.ns_inuse = nat_inuse;
+		IWCOPY((char *)&nat_stats, (char *)data, sizeof(nat_stats));
+		break;
+	case SIOCGNATL :
+	    {
+		natlookup_t nl;
+
+		IRCOPY((char *)data, (char *)&nl, sizeof(nl));
+
+		if (nat_lookupredir(&nl))
+			IWCOPY((char *)&nl, (char *)data, sizeof(nl));
+		else
+			error = ESRCH;
+		break;
+	    }
+	case SIOCFLNAT :
+		if (!(mode & FWRITE)) {
+			error = EPERM;
+			break;
+		}
+		ret = flush_nattable();
+		IWCOPY((caddr_t)&ret, data, sizeof(ret));
+		break;
+	case SIOCCNATL :
+		if (!(mode & FWRITE)) {
+			error = EPERM;
+			break;
+		}
+		ret = clear_natlist();
+		IWCOPY((caddr_t)&ret, data, sizeof(ret));
+		break;
+	}
+	MUTEX_EXIT(&ipf_nat);
+	return error;
+}
+
+
+static void nat_delete(natd)
+struct nat *natd;
+{
+	register struct nat **natp, *nat;
+
+	for (natp = natd->nat_hstart[0]; (nat = *natp);
+	     natp = &nat->nat_hnext[0])
+		if (nat == natd) {
+			*natp = nat->nat_hnext[0];
+			break;
+		}
+
+	for (natp = natd->nat_hstart[1]; (nat = *natp);
+	     natp = &nat->nat_hnext[1])
+		if (nat == natd) {
+			*natp = nat->nat_hnext[1];
+			break;
+		}
+
+	if (natd->nat_ptr) {
+		natd->nat_ptr->in_space++;
+		natd->nat_ptr->in_use--;
+	}
+	KFREE(natd);
+	nat_inuse--;
+}
+
+
+/*
+ * flush_nattable - clear the NAT table of all mapping entries.
+ */
+static int flush_nattable()
+{
+	register nat_t *nat, **natp;
+	register int j = 0;
+  
+	/*
+	 * Everything will be deleted, so lets just make it the deletions
+	 * quicker.
+	 */
+	bzero((char *)nat_table[0], sizeof(nat_table[0]));
+	bzero((char *)nat_table[1], sizeof(nat_table[1]));
+
+	for (natp = &nat_instances; (nat = *natp); ) {
+		*natp = nat->nat_next;
+		nat_delete(nat);
+		j++;
+	}
+
+	return j;
+}
+
+
+/*
+ * I know this is O(N*M), but it can't be avoided.
+ */
+static void nattable_sync()
+{
+	register nat_t *nat;
+	register ipnat_t *np;
+	int i;
+
+	for (i = NAT_SIZE - 1; i >= 0; i--)
+		for (nat = nat_instances; nat; nat = nat->nat_next) {
+			for (np = nat_list; np; np = np->in_next)
+				if (nat->nat_ptr == np)
+					break;
+			/*
+			 * XXX - is it better to remove this if ? works the
+			 * same if it is just "nat->nat_ptr = np".
+			 */
+			if (!np)
+				nat->nat_ptr = NULL;
+		}
+}
+
+
+/*
+ * clear_natlist - delete all entries in the active NAT mapping list.
+ */
+static int clear_natlist()
+{
+	register ipnat_t *n, **np;
+	int i = 0;
+
+	for (np = &nat_list; (n = *np); i++) {
+		*np = n->in_next;
+		KFREE(n);
+	}
+
+	nattable_sync();
+	return i;
+}
+
+
+/*
+ * Create a new NAT table entry.
+ */
+nat_t *nat_new(np, ip, fin, flags, direction)
+ipnat_t *np;
+ip_t *ip;
+fr_info_t *fin;
+u_short flags;
+int direction;
+{
+	register u_long sum1, sum2, sumd;
+	u_short port = 0, sport = 0, dport = 0, nport = 0;
+	struct in_addr in;
+	tcphdr_t *tcp = NULL;
+	nat_t *nat, **natp;
+	u_short nflags;
+
+	nflags = flags & np->in_flags;
+	if (flags & IPN_TCPUDP) {
+		tcp = (tcphdr_t *)fin->fin_dp;
+		sport = tcp->th_sport;
+		dport = tcp->th_dport;
+	}
+
+	/* Give me a new nat */
+	if (!(nat = (nat_t *)KMALLOC(sizeof(*nat))))
+		return NULL;
+
+	bzero((char *)nat, sizeof(*nat));
+
+	/*
+	 * Search the current table for a match.
+	 */
+	if (direction == NAT_OUTBOUND) {
+		/*
+		 * If it's an outbound packet which doesn't match any existing
+		 * record, then create a new port
+		 */
+		do {
+			port = 0;
+			in.s_addr = np->in_nip;
+			if (nflags & IPN_TCPUDP) {
+				port = htons(np->in_pnext++);
+				if (np->in_pnext >= ntohs(np->in_pmax)) {
+					np->in_pnext = ntohs(np->in_pmin);
+					np->in_space--;
+					if (np->in_outmsk != 0xffffffff)
+						np->in_nip++;
+				}
+			} else if (np->in_outmsk != 0xffffffff) {
+				np->in_space--;
+				np->in_nip++;
+			}
+
+			if (!port && (flags & IPN_TCPUDP))
+				port = sport;
+			if ((np->in_nip & ntohl(np->in_outmsk)) >
+			    ntohl(np->in_outip))
+				np->in_nip = ntohl(np->in_outip) + 1;
+		} while (nat_inlookup(flags, ip->ip_dst, dport, in, port));
+
+		/* Setup the NAT table */
+		nat->nat_inip = ip->ip_src;
+		nat->nat_outip.s_addr = htonl(in.s_addr);
+		nat->nat_oip = ip->ip_dst;
+
+		sum1 = (ntohl(ip->ip_src.s_addr) & 0xffff) +
+			(ntohl(ip->ip_src.s_addr) >> 16) + ntohs(sport);
+
+		sum2 = (in.s_addr & 0xffff) + (in.s_addr >> 16) + ntohs(port);
+
+		if (flags & IPN_TCPUDP) {
+			nat->nat_inport = sport;
+			nat->nat_outport = port;
+			nat->nat_oport = dport;
+		}
+	} else {
+
+		/*
+		 * Otherwise, it's an inbound packet. Most likely, we don't
+		 * want to rewrite source ports and source addresses. Instead,
+		 * we want to rewrite to a fixed internal address and fixed
+		 * internal port.
+		 */
+		in.s_addr = ntohl(np->in_inip);
+		if (!(nport = np->in_pnext))
+			nport = dport;
+
+		nat->nat_inip.s_addr = htonl(in.s_addr);
+		nat->nat_outip = ip->ip_dst;
+		nat->nat_oip = ip->ip_src;
+
+		sum1 = (ntohl(ip->ip_dst.s_addr) & 0xffff) +
+			(ntohl(ip->ip_dst.s_addr) >> 16) + ntohs(dport);
+
+		sum2 = (in.s_addr & 0xffff) + (in.s_addr >> 16) + ntohs(nport);
+
+		if (flags & IPN_TCPUDP) {
+			nat->nat_inport = nport;
+			nat->nat_outport = dport;
+			nat->nat_oport = sport;
+		}
+	}
+
+	/* Do it twice */
+	sum1 = (sum1 & 0xffff) + (sum1 >> 16);
+	sum1 = (sum1 & 0xffff) + (sum1 >> 16);
+
+	/* Do it twice */
+	sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+	sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+
+	if (sum1 > sum2)
+		sum2--; /* Because ~1 == -2, We really need ~1 == -1 */
+	sumd = sum2 - sum1;
+	sumd = (sumd & 0xffff) + (sumd >> 16);
+	nat->nat_sumd = (sumd & 0xffff) + (sumd >> 16);
+
+	if ((flags & IPN_TCPUDP) && ((sport != port) || (dport != nport))) {
+		if (direction == NAT_OUTBOUND)
+			sum1 = (ntohl(ip->ip_src.s_addr) & 0xffff) +
+				(ntohl(ip->ip_src.s_addr) >> 16);
+		else
+			sum1 = (ntohl(ip->ip_dst.s_addr) & 0xffff) +
+				(ntohl(ip->ip_dst.s_addr) >> 16);
+
+		sum2 = (in.s_addr & 0xffff) + (in.s_addr >> 16);
+
+		/* Do it twice */
+		sum1 = (sum1 & 0xffff) + (sum1 >> 16);
+		sum1 = (sum1 & 0xffff) + (sum1 >> 16);
+
+		/* Do it twice */
+		sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+		sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+
+		if (sum1 > sum2)
+			sum2--; /* Because ~1 == -2, We really need ~1 == -1 */
+		sumd = sum2 - sum1;
+		sumd = (sumd & 0xffff) + (sumd >> 16);
+		nat->nat_ipsumd = (sumd & 0xffff) + (sumd >> 16);
+	} else
+		nat->nat_ipsumd = nat->nat_sumd;
+
+	in.s_addr = htonl(in.s_addr);
+	nat->nat_next = nat_instances;
+	nat_instances = nat;
+	natp = &nat_table[0][nat->nat_inip.s_addr % NAT_SIZE];
+	nat->nat_hstart[0] = natp;
+	nat->nat_hnext[0] = *natp;
+	*natp = nat;
+	natp = &nat_table[1][nat->nat_outip.s_addr % NAT_SIZE];
+	nat->nat_hstart[1] = natp;
+	nat->nat_hnext[1] = *natp;
+	*natp = nat;
+	nat->nat_ptr = np;
+	np->in_use++;
+	if (direction == NAT_OUTBOUND) {
+		if (flags & IPN_TCPUDP)
+			tcp->th_sport = htons(port);
+	} else {
+		if (flags & IPN_TCPUDP)
+			tcp->th_dport = htons(nport);
+	}
+	nat_stats.ns_added++;
+	nat_inuse++;
+	return nat;
+}
+
+
+/*
+ * NB: these lookups don't lock access to the list, it assume it has already
+ * been done!
+ */
+/*
+ * Lookup a nat entry based on the mapped destination ip address/port and
+ * real source address/port.  We use this lookup when receiving a packet,
+ * we're looking for a table entry, based on the destination address.
+ * NOTE: THE PACKET BEING CHECKED (IF FOUND) HAS A MAPPING ALREADY.
+ */
+nat_t *nat_inlookup(flags, src, sport, mapdst, mapdport)
+register int flags;
+struct in_addr src , mapdst;
+u_short sport, mapdport;
+{
+	register nat_t *nat;
+
+	flags &= IPN_TCPUDP;
+
+	nat = nat_table[1][mapdst.s_addr % NAT_SIZE];
+	for (; nat; nat = nat->nat_hnext[1])
+		if (nat->nat_oip.s_addr == src.s_addr &&
+		    nat->nat_outip.s_addr == mapdst.s_addr &&
+		    (!flags || (nat->nat_oport == sport &&
+		     nat->nat_outport == mapdport)))
+			return nat;
+	return NULL;
+}
+
+
+/*
+ * Lookup a nat entry based on the source 'real' ip address/port and
+ * destination address/port.  We use this lookup when sending a packet out,
+ * we're looking for a table entry, based on the source address.
+ * NOTE: THE PACKET BEING CHECKED (IF FOUND) HAS A MAPPING ALREADY.
+ */
+nat_t *nat_outlookup(flags, src, sport, dst, dport)
+register int flags;
+struct in_addr src , dst;
+u_short sport, dport;
+{
+	register nat_t *nat;
+
+	flags &= IPN_TCPUDP;
+
+	nat = nat_table[0][src.s_addr % NAT_SIZE];
+	for (; nat; nat = nat->nat_hnext[0])
+		if (nat->nat_inip.s_addr == src.s_addr &&
+		    nat->nat_oip.s_addr == dst.s_addr &&
+		    (!flags || (nat->nat_inport == sport &&
+		     nat->nat_oport == dport)))
+			return nat;
+	return NULL;
+}
+
+
+/*
+ * Lookup a nat entry based on the mapped source ip address/port and
+ * real destination address/port.  We use this lookup when sending a packet
+ * out, we're looking for a table entry, based on the source address.
+ */
+nat_t *nat_lookupmapip(flags, mapsrc, mapsport, dst, dport)
+register int flags;
+struct in_addr mapsrc , dst;
+u_short mapsport, dport;
+{
+	register nat_t *nat;
+
+	flags &= IPN_TCPUDP;
+
+	nat = nat_table[1][mapsrc.s_addr % NAT_SIZE];
+	for (; nat; nat = nat->nat_hnext[0])
+		if (nat->nat_outip.s_addr == mapsrc.s_addr &&
+		    nat->nat_oip.s_addr == dst.s_addr &&
+		    (!flags || (nat->nat_outport == mapsport &&
+		     nat->nat_oport == dport)))
+			return nat;
+	return NULL;
+}
+
+
+/*
+ * Lookup the NAT tables to search for a matching redirect
+ */
+nat_t *nat_lookupredir(np)
+register natlookup_t *np;
+{
+	nat_t *nat;
+
+	/*
+	 * If nl_inip is non null, this is a lookup based on the real
+	 * ip address. Else, we use the fake.
+	 */
+	if ((nat = nat_outlookup(IPN_TCPUDP, np->nl_inip, np->nl_inport,
+				 np->nl_outip, np->nl_outport))) {
+		np->nl_inip = nat->nat_outip;
+		np->nl_inport = nat->nat_outport;
+	}
+	return nat;
+}
+
+
+/*
+ * Packets going out on the external interface go through this.
+ * Here, the source address requires alteration, if anything.
+ */
+int ip_natout(ip, hlen, fin)
+ip_t *ip;
+int hlen;
+fr_info_t *fin;
+{
+	register ipnat_t *np;
+	register u_long ipa;
+	tcphdr_t *tcp = NULL;
+	nat_t *nat;
+	u_short nflags = 0, sport = 0, dport = 0, *csump = NULL;
+	struct ifnet *ifp;
+	frentry_t *fr;
+
+	if ((fr = fin->fin_fr) && !(fr->fr_flags & FR_DUP) &&
+	    fr->fr_tif.fd_ifp && fr->fr_tif.fd_ifp != (void *)-1)
+		ifp = fr->fr_tif.fd_ifp;
+	else
+		ifp = fin->fin_ifp;
+
+	if (!(ip->ip_off & 0x1fff) && !(fin->fin_fi.fi_fl & FI_SHORT)) {
+		if (ip->ip_p == IPPROTO_TCP)
+			nflags = IPN_TCP;
+		else if (ip->ip_p == IPPROTO_UDP)
+			nflags = IPN_UDP;
+		if (nflags) {
+			tcp = (tcphdr_t *)fin->fin_dp;
+			sport = tcp->th_sport;
+			dport = tcp->th_dport;
+		}
+	}
+
+	ipa = ip->ip_src.s_addr;
+
+	MUTEX_ENTER(&ipf_nat);
+	for (np = nat_list; np; np = np->in_next)
+		if ((np->in_ifp == ifp) && np->in_space &&
+		    (!np->in_flags || (np->in_flags & nflags)) &&
+		    ((ipa & np->in_inmsk) == np->in_inip) &&
+		    ((np->in_redir == NAT_MAP) ||
+		     (np->in_pnext == sport))) {
+			/*
+			 * If there is no current entry in the nat table for
+			 * this IP#, create one for it.
+			 */
+			if (!(nat = nat_outlookup(nflags, ip->ip_src, sport,
+						  ip->ip_dst, dport))) {
+				if (np->in_redir == NAT_REDIRECT)
+					continue;
+				/*
+				 * if it's a redirection, then we don't want
+				 * to create new outgoing port stuff.
+				 * Redirections are only for incoming
+				 * connections.
+				 */
+				if (!(nat = nat_new(np, ip, fin, nflags,
+						    NAT_OUTBOUND)))
+					break;
+			}
+			ip->ip_src = nat->nat_outip;
+
+			nat->nat_age = fr_defnatage;	/* 5 mins */
+
+			/*
+			 * Fix up checksums, not by recalculating them, but
+			 * simply computing adjustments.
+			 */
+#if SOLARIS
+			if (np->in_redir == NAT_MAP)
+				fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
+			else
+				fix_incksum(&ip->ip_sum, nat->nat_ipsumd);
+#endif
+
+			if (nflags && !(ip->ip_off & 0x1fff) &&
+			    !(fin->fin_fi.fi_fl & FI_SHORT)) {
+
+				if (nat->nat_outport)
+					tcp->th_sport = nat->nat_outport;
+
+				if (ip->ip_p == IPPROTO_TCP) {
+					csump = &tcp->th_sum;
+					set_tcp_age(&nat->nat_age,
+						    nat->nat_state, ip, fin,1);
+				} else if (ip->ip_p == IPPROTO_UDP) {
+					udphdr_t *udp = (udphdr_t *)tcp;
+
+					if (udp->uh_sum)
+						csump = &udp->uh_sum;
+				} else if (ip->ip_p == IPPROTO_ICMP) {
+					icmphdr_t *ic = (icmphdr_t *)tcp;
+
+					csump = &ic->icmp_cksum;
+				}
+				if (csump) {
+					if (np->in_redir == NAT_MAP)
+						fix_outcksum(csump,
+							     nat->nat_sumd);
+					else
+						fix_incksum(csump,
+							    nat->nat_sumd);
+				}
+			}
+			nat_stats.ns_mapped[1]++;
+			MUTEX_EXIT(&ipf_nat);
+			return 1;
+		}
+	MUTEX_EXIT(&ipf_nat);
+	return 0;
+}
+
+
+/*
+ * Packets coming in from the external interface go through this.
+ * Here, the destination address requires alteration, if anything.
+ */
+int ip_natin(ip, hlen, fin)
+ip_t *ip;
+int hlen;
+fr_info_t *fin;
+{
+	register ipnat_t *np;
+	register struct in_addr in;
+	struct ifnet *ifp = fin->fin_ifp;
+	tcphdr_t *tcp = NULL;
+	u_short sport = 0, dport = 0, nflags = 0, *csump = NULL;
+	nat_t *nat;
+
+	if (!(ip->ip_off & 0x1fff) && !(fin->fin_fi.fi_fl & FI_SHORT)) {
+		if (ip->ip_p == IPPROTO_TCP)
+			nflags = IPN_TCP;
+		else if (ip->ip_p == IPPROTO_UDP)
+			nflags = IPN_UDP;
+		if (nflags) {
+			tcp = (tcphdr_t *)((char *)ip + hlen);
+			dport = tcp->th_dport;
+			sport = tcp->th_sport;
+		}
+	}
+
+	in = ip->ip_dst;
+
+	MUTEX_ENTER(&ipf_nat);
+	for (np = nat_list; np; np = np->in_next)
+		if ((np->in_ifp == ifp) &&
+		    (!np->in_flags || (nflags & np->in_flags)) &&
+		    ((in.s_addr & np->in_outmsk) == np->in_outip) &&
+		    (np->in_redir == NAT_MAP || np->in_pmin == dport)) {
+			if (!(nat = nat_inlookup(nflags, ip->ip_src, sport,
+						 ip->ip_dst, dport))) {
+				if (np->in_redir == NAT_MAP)
+					continue;
+				else {
+					/*
+					 * If this rule (np) is a redirection,
+					 * rather than a mapping, then do a
+					 * nat_new. Otherwise, if it's just a
+					 * mapping, do a continue;
+					 */
+					if (!(nat = nat_new(np, ip, fin,
+							    nflags,
+							    NAT_INBOUND)))
+						break;
+				}
+			}
+			ip->ip_dst = nat->nat_inip;
+
+			nat->nat_age = fr_defnatage;
+
+			/*
+			 * Fix up checksums, not by recalculating them, but
+			 * simply computing adjustments.
+			 */
+#if SOLARIS
+			if (np->in_redir == NAT_MAP)
+				fix_incksum(&ip->ip_sum, nat->nat_ipsumd);
+			else
+				fix_outcksum(&ip->ip_sum, nat->nat_ipsumd);
+#endif
+			if (nflags && !(ip->ip_off & 0x1fff) &&
+			    !(fin->fin_fi.fi_fl & FI_SHORT)) {
+
+				if (nat->nat_inport)
+					tcp->th_dport = nat->nat_inport;
+
+				if (ip->ip_p == IPPROTO_TCP) {
+					csump = &tcp->th_sum;
+					set_tcp_age(&nat->nat_age,
+						    nat->nat_state, ip, fin,0);
+				} else if (ip->ip_p == IPPROTO_UDP) {
+					udphdr_t *udp = (udphdr_t *)tcp;
+
+					if (udp->uh_sum)
+						csump = &udp->uh_sum;
+				} else if (ip->ip_p == IPPROTO_ICMP) {
+					icmphdr_t *ic = (icmphdr_t *)tcp;
+
+					csump = &ic->icmp_cksum;
+				}
+				if (csump) {
+					if (np->in_redir == NAT_MAP)
+						fix_incksum(csump,
+							    nat->nat_sumd);
+					else
+						fix_outcksum(csump,
+							     nat->nat_sumd);
+				}
+			}
+			nat_stats.ns_mapped[0]++;
+			MUTEX_EXIT(&ipf_nat);
+			return 1;
+		}
+	MUTEX_EXIT(&ipf_nat);
+	return 0;
+}
+
+
+/*
+ * Free all memory used by NAT structures allocated at runtime.
+ */
+void ip_natunload()
+{
+	MUTEX_ENTER(&ipf_nat);
+
+	(void) clear_natlist();
+	(void) flush_nattable();
+
+	MUTEX_EXIT(&ipf_nat);
+}
+
+
+/*
+ * Slowly expire held state for NAT entries.  Timeouts are set in
+ * expectation of this being called twice per second.
+ */
+void ip_natexpire()
+{
+	register struct nat *nat, **natp;
+
+	MUTEX_ENTER(&ipf_nat);
+	for (natp = &nat_instances; (nat = *natp); natp = &nat->nat_next) {
+		if (--nat->nat_age)
+			continue;
+		*natp = nat->nat_next;
+		nat_delete(nat);
+		nat_stats.ns_expire++;
+	}
+	MUTEX_EXIT(&ipf_nat);
+}
diff --git a/contrib/ipfilter/ip_nat.h b/contrib/ipfilter/ip_nat.h
new file mode 100644
index 0000000..d64183a
--- /dev/null
+++ b/contrib/ipfilter/ip_nat.h
@@ -0,0 +1,118 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ip_nat.h	1.5 2/4/96
+ * $Id: ip_nat.h,v 2.0.1.7 1997/01/30 12:39:41 darrenr Exp $
+ */
+
+#ifndef	__IP_NAT_H_
+#define	__IP_NAT_H__
+
+#ifndef SOLARIS
+#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
+#endif
+
+#if defined(__STDC__) || defined(__GNUC__)
+#define	SIOCADNAT	_IOW('r', 80, struct ipnat)
+#define	SIOCRMNAT	_IOW('r', 81, struct ipnat)
+#define	SIOCGNATS	_IOR('r', 82, struct natstat)
+#define	SIOCGNATL	_IOWR('r', 83, struct natlookup)
+#define SIOCGFRST	_IOR('r', 84, struct ipfrstat)
+#define SIOCGIPST	_IOR('r', 85, struct ips_stat)
+#define	SIOCFLNAT	_IOWR('r', 86, int)
+#define	SIOCCNATL	_IOWR('r', 87, int)
+
+#else
+#define	SIOCADNAT	_IOW(r, 80, struct ipnat)
+#define	SIOCRMNAT	_IOW(r, 81, struct ipnat)
+#define	SIOCGNATS	_IOR(r, 82, struct natstat)
+#define	SIOCGNATL	_IOWR(r, 83, struct natlookup)
+#define SIOCGFRST	_IOR(r, 84, struct ipfrstat)
+#define SIOCGIPST	_IOR(r, 85, struct ips_stat)
+#define	SIOCFLNAT	_IOWR(r, 86, int)
+#define	SIOCCNATL	_IOWR(r, 87, int)
+#endif
+
+#define	NAT_SIZE	367
+
+typedef	struct	nat	{
+	int	nat_age;
+	u_long	nat_sumd;
+	u_long	nat_ipsumd;
+	struct	in_addr	nat_inip;
+	struct	in_addr	nat_outip;
+	struct	in_addr	nat_oip;	/* other ip */
+	u_short	nat_oport;	/* other port */
+	u_short	nat_inport;
+	u_short	nat_outport;
+	u_short	nat_use;
+	u_char	nat_state[2];
+	struct	ipnat	*nat_ptr;
+	struct	nat	*nat_next;
+	struct	nat	*nat_hnext[2];
+	struct	nat	**nat_hstart[2];
+} nat_t;
+
+typedef	struct	ipnat	{
+	struct	ipnat	*in_next;
+	void	*in_ifp;
+	u_int	in_space;
+	u_int	in_use;
+	struct	in_addr	in_nextip;
+	u_short	in_pnext;
+	u_short	in_flags;
+	u_short	in_port[2];
+	struct	in_addr	in_in[2];
+	struct	in_addr	in_out[2];
+	int	in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
+	char	in_ifname[IFNAMSIZ];
+} ipnat_t;
+
+#define	in_pmin		in_port[0]	/* Also holds static redir port */
+#define	in_pmax		in_port[1]
+#define	in_nip		in_nextip.s_addr
+#define	in_inip		in_in[0].s_addr
+#define	in_inmsk	in_in[1].s_addr
+#define	in_outip	in_out[0].s_addr
+#define	in_outmsk	in_out[1].s_addr
+
+#define	NAT_INBOUND	0
+#define	NAT_OUTBOUND	1
+
+#define	NAT_MAP		0
+#define	NAT_REDIRECT	1
+
+#define	IPN_CMPSIZ	(sizeof(struct in_addr) * 4 + sizeof(u_short) * 3 + \
+			 sizeof(int))
+
+typedef	struct	natlookup {
+	struct	in_addr	nl_inip;
+	struct	in_addr	nl_outip;
+	u_short	nl_inport;
+	u_short	nl_outport;
+} natlookup_t;
+
+typedef	struct	natstat	{
+	u_long	ns_mapped[2];
+	u_long	ns_added;
+	u_long	ns_expire;
+	u_long	ns_inuse;
+	nat_t	**ns_table[2];
+	ipnat_t	*ns_list;
+} natstat_t;
+
+#define	IPN_ANY		0
+#define	IPN_TCP		1
+#define	IPN_UDP		2
+#define	IPN_TCPUDP	3
+
+extern nat_t *nat_table[2][NAT_SIZE];
+extern int nat_ioctl();
+extern nat_t *nat_outlookup(), *nat_inlookup(), *nat_lookupredir();
+extern int ip_natout(), ip_natin();
+extern void ip_natunload(), ip_natexpire();
+#endif /* __IP_NAT_H__ */
diff --git a/contrib/ipfilter/ip_sfil.c b/contrib/ipfilter/ip_sfil.c
new file mode 100644
index 0000000..debc512
--- /dev/null
+++ b/contrib/ipfilter/ip_sfil.c
@@ -0,0 +1,731 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * I hate legaleese, don't you ?
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "%W% %G% (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: ip_sfil.c,v 2.0.1.3 1997/02/04 14:49:15 darrenr Exp $";
+#endif
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/param.h>
+#include <sys/cpuvar.h>
+#include <sys/open.h>
+#include <sys/ioctl.h>
+#include <sys/systm.h>
+#include <sys/cred.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/ksynch.h>
+#include <sys/kmem.h>
+#include <sys/mkdev.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/dditypes.h>
+#include <sys/cmn_err.h>
+#include <net/if.h>
+#include <net/af.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_state.h"
+#include "ip_frag.h"
+#include "ip_nat.h"
+#include <inet/ip_ire.h>
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+extern	fr_flags, fr_active;
+
+int	ipfr_timer_id = 0;
+int	ipl_unreach = ICMP_UNREACH_HOST;
+int	send_reset();
+
+#ifdef	IPFILTER_LOG
+int	ipllog();
+static	void	frflush();
+char	iplbuf[IPLLOGSIZE];
+caddr_t	iplh = iplbuf, iplt = iplbuf;
+static	int	iplused = 0;
+#endif /* IPFILTER_LOG */
+static	int	frrequest();
+kmutex_t	ipl_mutex, ipf_mutex, ipfs_mutex;
+kmutex_t	ipf_frag, ipf_state, ipf_nat;
+kcondvar_t	iplwait;
+
+extern	void	ipfr_slowtimer();
+
+
+int ipldetach()
+{
+	int	i = FR_INQUE|FR_OUTQUE;
+
+	untimeout(ipfr_timer_id);
+	frflush((caddr_t)&i);
+	ipfr_unload();
+	fr_stateunload();
+	ip_natunload();
+	cv_destroy(&iplwait);
+	mutex_destroy(&ipl_mutex);
+	mutex_destroy(&ipf_mutex);
+	mutex_destroy(&ipfs_mutex);
+	mutex_destroy(&ipf_frag);
+	mutex_destroy(&ipf_state);
+	mutex_destroy(&ipf_nat);
+	return 0;
+}
+
+
+int iplattach()
+{
+	bzero((char *)nat_table, sizeof(nat_t *) * NAT_SIZE * 2);
+	mutex_init(&ipl_mutex, "ipf log mutex", MUTEX_DRIVER, NULL);
+	mutex_init(&ipf_mutex, "ipf filter mutex", MUTEX_DRIVER, NULL);
+	mutex_init(&ipfs_mutex, "ipf solaris mutex", MUTEX_DRIVER, NULL);
+	mutex_init(&ipf_frag, "ipf fragment mutex", MUTEX_DRIVER, NULL);
+	mutex_init(&ipf_state, "ipf IP state mutex", MUTEX_DRIVER, NULL);
+	mutex_init(&ipf_nat, "ipf IP NAT mutex", MUTEX_DRIVER, NULL);
+	cv_init(&iplwait, "ipl condvar", CV_DRIVER, NULL);
+	ipfr_timer_id = timeout(ipfr_slowtimer, NULL, HZ/2);
+	return 0;
+}
+
+
+static	void	frzerostats(data)
+caddr_t	data;
+{
+	struct	friostat	fio;
+
+	bcopy((char *)frstats, (char *)fio.f_st,
+		sizeof(struct filterstats) * 2);
+	fio.f_fin[0] = ipfilter[0][0];
+	fio.f_fin[1] = ipfilter[0][1];
+	fio.f_fout[0] = ipfilter[1][0];
+	fio.f_fout[1] = ipfilter[1][1];
+	fio.f_acctin[0] = ipacct[0][0];
+	fio.f_acctin[1] = ipacct[0][1];
+	fio.f_acctout[0] = ipacct[1][0];
+	fio.f_acctout[1] = ipacct[1][1];
+	fio.f_active = fr_active;
+	IWCOPY((caddr_t)&fio, data, sizeof(fio));
+	bzero((char *)frstats, sizeof(*frstats) * 2);
+}
+
+
+#ifdef	IPFILTER_LOG
+static void frflush(data)
+caddr_t data;
+{
+	struct frentry *f, **fp;
+	int flags, flushed = 0, set = fr_active;
+
+	IRCOPY(data, (caddr_t)&flags, sizeof(flags));
+	bzero((char *)frcache, sizeof(frcache[0]) * 2);
+
+	if (flags & FR_INACTIVE)
+		set = 1 - set;
+	if (flags & FR_OUTQUE) {
+		for (fp = &ipfilter[1][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+		for (fp = &ipacct[1][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+	}
+	if (flags & FR_INQUE) {
+		for (fp = &ipfilter[0][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+		for (fp = &ipacct[0][set]; (f = *fp); ) {
+			*fp = f->fr_next;
+			KFREE(f);
+			flushed++;
+		}
+	}
+
+	IWCOPY((caddr_t)&flushed, data, sizeof(flushed));
+}
+#endif /* IPFILTER_LOG */
+
+
+/*
+ * Filter ioctl interface.
+ */
+int iplioctl(dev, cmd, data, mode, cp, rp)
+dev_t dev;
+int cmd;
+caddr_t data;
+int mode;
+cred_t *cp;
+int *rp;
+{
+	int error = 0;
+
+	switch (cmd) {
+	case SIOCFRENB :
+	{
+		u_int	enable;
+
+		if (!(mode & FWRITE))
+			return EPERM;
+		IRCOPY(data, (caddr_t)&enable, sizeof(enable));
+		break;
+	}
+	case SIOCSETFF :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipf_mutex);
+		IRCOPY(data, (caddr_t)&fr_flags, sizeof(fr_flags));
+		mutex_exit(&ipf_mutex);
+		break;
+	case SIOCGETFF :
+		IWCOPY((caddr_t)&fr_flags, data, sizeof(fr_flags));
+		break;
+	case SIOCINAFR :
+	case SIOCRMAFR :
+	case SIOCADAFR :
+	case SIOCZRLST :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipf_mutex);
+		error = frrequest(cmd, data, fr_active);
+		mutex_exit(&ipf_mutex);
+		break;
+	case SIOCINIFR :
+	case SIOCRMIFR :
+	case SIOCADIFR :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipf_mutex);
+		error = frrequest(cmd, data, 1 - fr_active);
+		mutex_exit(&ipf_mutex);
+		break;
+	case SIOCSWAPA :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipf_mutex);
+		bzero((char *)frcache, sizeof(frcache[0]) * 2);
+		IWCOPY((caddr_t)&fr_active, (caddr_t)data, sizeof(fr_active));
+		fr_active = 1 - fr_active;
+		mutex_exit(&ipf_mutex);
+		break;
+	case SIOCGETFS :
+	{
+		struct	friostat	fio;
+
+		mutex_enter(&ipf_mutex);
+		bcopy((char *)frstats, (char *)fio.f_st,
+			sizeof(struct filterstats) * 2);
+		fio.f_fin[0] = ipfilter[0][0];
+		fio.f_fin[1] = ipfilter[0][1];
+		fio.f_fout[0] = ipfilter[1][0];
+		fio.f_fout[1] = ipfilter[1][1];
+		fio.f_acctin[0] = ipacct[0][0];
+		fio.f_acctin[1] = ipacct[0][1];
+		fio.f_acctout[0] = ipacct[1][0];
+		fio.f_acctout[1] = ipacct[1][1];
+		fio.f_active = fr_active;
+		mutex_exit(&ipf_mutex);
+		IWCOPY((caddr_t)&fio, data, sizeof(fio));
+		break;
+	}
+	case SIOCFRZST :
+		if (!(mode & FWRITE))
+			return EPERM;
+		frzerostats(data);
+		break;
+#ifdef	IPFILTER_LOG
+	case	SIOCIPFFL :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipf_mutex);
+		frflush(data);
+		mutex_exit(&ipf_mutex);
+		break;
+	case	SIOCIPFFB :
+		if (!(mode & FWRITE))
+			return EPERM;
+		mutex_enter(&ipl_mutex);
+		IWCOPY((caddr_t)&iplused, data, sizeof(iplused));
+		iplh = iplt = iplbuf;
+		iplused = 0;
+		mutex_exit(&ipl_mutex);
+		break;
+#endif /* IPFILTER_LOG */
+	case SIOCFRSYN :
+		if (!(mode & FWRITE))
+			return EPERM;
+		error = ipfsync();
+		break;
+	case SIOCADNAT :
+	case SIOCRMNAT :
+	case SIOCGNATS :
+	case SIOCGNATL :
+	case SIOCFLNAT :
+	case SIOCCNATL :
+		error = nat_ioctl(data, cmd, mode);
+		break;
+	case SIOCGFRST :
+		IWCOPY((caddr_t)ipfr_fragstats(), data, sizeof(ipfrstat_t));
+		break;
+	case SIOCGIPST :   
+		IWCOPY((caddr_t)fr_statetstats(), data, sizeof(ips_stat_t));
+		break;
+	default :
+		error = EINVAL;
+		break;
+	}
+	return error;
+}
+
+
+ill_t	*get_unit(name)
+char	*name;
+{
+	ill_t	*il;
+	int	len = strlen(name) + 1;	/* includes \0 */
+
+	for (il = ill_g_head; il; il = il->ill_next)
+		if ((len == il->ill_name_length) &&
+		    !strncmp(il->ill_name, name, len))
+			return il;
+	return NULL;
+}
+
+
+static int frrequest(req, data, set)
+int req, set;
+caddr_t data;
+{
+	register frentry_t *fp, *f, **fprev;
+	register frentry_t **ftail;
+	frentry_t fr;
+	frdest_t *fdp;
+	int error = 0, in;
+	ill_t *ill;
+	ipif_t *ipif;
+	ire_t *ire;
+
+	fp = &fr;
+	IRCOPY(data, (caddr_t)fp, sizeof(*fp));
+
+	bzero((char *)frcache, sizeof(frcache[0]) * 2);
+
+	in = (fp->fr_flags & FR_INQUE) ? 0 : 1;
+	if (fp->fr_flags & FR_ACCOUNT)
+		ftail = fprev = &ipacct[in][set];
+	else if (fp->fr_flags & (FR_OUTQUE|FR_INQUE))
+		ftail = fprev = &ipfilter[in][set];
+	else
+		return ESRCH;
+
+	if (*fp->fr_ifname) {
+		fp->fr_ifa = (struct ifnet *)get_unit((char *)fp->fr_ifname);
+		if (!fp->fr_ifa)
+			fp->fr_ifa = (struct ifnet *)-1;
+	}
+
+	fdp = &fp->fr_dif;
+	fp->fr_flags &= ~FR_DUP;
+	if (*fdp->fd_ifname) {
+		ill = get_unit(fdp->fd_ifname);
+		if (!ill)
+			ire = (ire_t *)-1;
+		else if ((ipif = ill->ill_ipif)) {
+			ire = ire_lookup_myaddr(ipif->ipif_local_addr);
+			if (!ire)
+				ire = (ire_t *)-1;
+			else
+				fp->fr_flags |= FR_DUP;
+		}
+		fdp->fd_ifp = (struct ifnet *)ire;
+	}
+
+	fdp = &fp->fr_tif;
+	if (*fdp->fd_ifname) {
+		ill = get_unit(fdp->fd_ifname);
+		if (!ill)
+			ire = (ire_t *)-1;
+		else if ((ipif = ill->ill_ipif)) {
+			ire = ire_lookup_myaddr(ipif->ipif_local_addr);
+			if (!ire)
+				ire = (ire_t *)-1;
+		}
+		fdp->fd_ifp = (struct ifnet *)ire;
+	}
+
+	/*
+	 * Look for a matching filter rule, but don't include the next or
+	 * interface pointer in the comparison (fr_next, fr_ifa).
+	 */
+	for (; (f = *ftail); ftail = &f->fr_next)
+		if (bcmp((char *)&f->fr_ip, (char *)&fp->fr_ip,
+			 FR_CMPSIZ) == 0)
+			break;
+
+	/*
+	 * If zero'ing statistics, copy current to caller and zero.
+	 */
+	if (req == SIOCZRLST) {
+		if (!f)
+			return ESRCH;
+		IWCOPY((caddr_t)f, data, sizeof(*f));
+		f->fr_hits = 0;
+		f->fr_bytes = 0;
+		return 0;
+	}
+
+	if (!f) {
+		ftail = fprev;
+		if (req != SIOCINAFR && req != SIOCINIFR)
+			while ((f = *ftail))
+				ftail = &f->fr_next;
+		else if (fp->fr_hits)
+			while (--fp->fr_hits && (f = *ftail))
+				ftail = &f->fr_next;
+		f = NULL;
+	}
+
+	if (req == SIOCDELFR || req == SIOCRMIFR) {
+		if (!f)
+			error = ESRCH;
+		else {
+			*ftail = f->fr_next;
+			KFREE(f);
+		}
+	} else {
+		if (f)
+			error = EEXIST;
+		else {
+			if ((f = (struct frentry *)KMALLOC(sizeof(*f)))) {
+				bcopy((char *)fp, (char *)f, sizeof(*f));
+				f->fr_hits = 0;
+				f->fr_next = *ftail;
+				*ftail = f;
+			} else
+				error = ENOMEM;
+		}
+	}
+	return (error);
+}
+
+
+/*
+ * routines below for saving IP headers to buffer
+ */
+int iplopen(devp, flags, otype, cred)
+dev_t *devp;
+int flags, otype;
+cred_t *cred;
+{
+	u_int min = getminor(*devp);
+
+	if (!(otype & OTYP_CHR))
+		return ENXIO;
+	if (min)
+		min = ENXIO;
+	return min;
+}
+
+
+int iplclose(dev, flags, otype, cred)
+dev_t dev;
+int flags, otype;
+cred_t *cred;
+{
+	u_int	min = getminor(dev);
+
+	if (min)
+		min = ENXIO;
+	return min;
+}
+
+#ifdef	IPFILTER_LOG
+/*
+ * iplread/ipllog
+ * both of these must operate with at least splnet() lest they be
+ * called during packet processing and cause an inconsistancy to appear in
+ * the filter lists.
+ */
+int iplread(dev, uio, cp)
+dev_t dev;
+register struct uio *uio;
+cred_t *cp;
+{
+	register int ret;
+	register size_t sz, sx;
+	char *h, *t;
+	int error, used, usedo, copied;
+
+	if (!uio->uio_resid)
+		return 0;
+	if ((uio->uio_resid < 0) || (uio->uio_resid > IPLLOGSIZE))
+		return EINVAL;
+
+	/*
+	 * Lock the log so we can snapshot the variables.  Wait for a signal
+	 * if the log is empty.
+	 */
+	mutex_enter(&ipl_mutex);
+	while (!iplused) {
+		error = cv_wait_sig(&iplwait, &ipl_mutex);
+		if (!error) {
+			mutex_exit(&ipl_mutex);
+			return EINTR;
+		}
+	}
+	h = iplh;
+	t = iplt;
+	used = iplused;
+	mutex_exit(&ipl_mutex);
+	usedo = used;
+
+	/*
+	 * Given up the mutex, the log can grow more, but we can't hold the
+	 * mutex across the uiomove's.
+	 */
+	sx = sz = MIN(uio->uio_resid, used);
+	if (h <= t)
+		sz = MIN(sz, IPLLOGSIZE + iplbuf - t);
+
+	if (!(ret = uiomove(t, sz, UIO_READ, uio))) {
+		t += sz;
+		sx -= sz;
+		used -= sz;
+		if ((h < t) && (t >= iplbuf + IPLLOGSIZE))
+			t = iplbuf;
+
+		if (sx && !(ret = uiomove(t, sx, UIO_READ, uio)))
+			used -= sx;
+	}
+
+	/*
+	 * copied all the data, now adjust variables to match this.
+	 */
+	mutex_enter(&ipl_mutex);
+	copied = usedo - used;
+	iplused -= copied;
+
+	if (!iplused)	/* minimise wrapping around the end */
+		iplh = iplt = iplbuf;
+	else {
+		iplt += copied;
+		if (iplt >= iplbuf + IPLLOGSIZE)
+			iplt -= IPLLOGSIZE;
+		if (iplt == iplbuf + IPLLOGSIZE)
+			iplt = iplbuf;
+	}
+	mutex_exit(&ipl_mutex);
+	return ret;
+}
+
+
+int ipllog(flags, ip, fin, m)
+u_int flags;
+ip_t *ip;
+fr_info_t *fin;
+mblk_t *m;
+{
+	struct ipl_ci iplci;
+	register int len, mlen, hlen;
+	register u_char *s = (u_char *)ip;
+	ill_t *il = fin->fin_ifp;
+
+	hlen = fin->fin_hlen;
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		hlen += MIN(sizeof(tcphdr_t), fin->fin_dlen);
+	else if (ip->ip_p == IPPROTO_ICMP) {
+		struct	icmp	*icmp = (struct icmp *)(s + hlen);
+
+		switch (icmp->icmp_type) {
+		case ICMP_UNREACH :
+		case ICMP_SOURCEQUENCH :
+		case ICMP_REDIRECT :
+		case ICMP_TIMXCEED :
+		case ICMP_PARAMPROB :
+			hlen += MIN(sizeof(struct icmp) + 8, fin->fin_dlen);
+			break;
+		default :
+			hlen += MIN(sizeof(struct icmp), fin->fin_dlen);
+			break;
+		}
+	}
+
+	mlen = (flags & FR_LOGBODY) ? MIN(msgdsize(m) - hlen, 128) : 0;
+	len = hlen + sizeof(iplci) + mlen;
+	mutex_enter(&ipl_mutex);
+	if ((iplused + len) > IPLLOGSIZE) {
+		mutex_exit(&ipl_mutex);
+		return 0;
+	}
+	iplused += len;
+
+	uniqtime((struct timeval *)&iplci);
+	iplci.flags = flags;
+	iplci.hlen = (u_char)hlen;
+	iplci.plen = (u_char)mlen;
+	iplci.rule = fin->fin_rule;
+	iplci.unit = (u_char)il->ill_ppa;
+	bcopy(il->ill_name, (char *)iplci.ifname, MIN(il->ill_name_length, 4));
+
+	/*
+	 * Gauranteed to succeed from above
+	 */
+	(void) fr_copytolog(&iplci, sizeof(iplci));
+	len -= sizeof(iplci);
+
+	if (len && m) {
+		s = m->b_rptr;
+		do {
+			if ((hlen = MIN(m->b_wptr - s, len))) {
+				if (fr_copytolog(s, hlen))
+					break;
+				len -= hlen;
+			}
+			if ((m = m->b_cont))
+				s = m->b_rptr;
+		} while (m && len);
+	}
+
+	cv_signal(&iplwait);
+	mutex_exit(&ipl_mutex);
+	return 1;
+}
+#endif /* IPFILTER_LOG */
+
+
+u_short	ipf_cksum(addr, len)
+register u_short *addr;
+register int len;
+{
+	register u_long sum = 0;
+
+	for (sum = 0; len > 1; len -= 2)
+		sum += *addr++;
+
+	/* mop up an odd byte, if necessary */
+	if (len == 1)
+		sum += *(u_char *)addr;
+
+	/*
+	 * add back carry outs from top 16 bits to low 16 bits
+	 */
+	sum = (sum >> 16) + (sum & 0xffff);	/* add hi 16 to low 16 */
+	sum += (sum >> 16);			/* add carry */
+	return (u_short)(~sum);
+}
+
+/*
+ * send_reset - this could conceivably be a call to tcp_respond(), but that
+ * requires a large amount of setting up and isn't any more efficient.
+ */
+int send_reset(ti, qif, q)
+struct tcpiphdr *ti;
+qif_t *qif;
+queue_t *q;
+{
+	struct ip *ip;
+	struct tcphdr *tcp;
+	mblk_t *m;
+	int tlen = 0;
+
+	if (ti->ti_flags & TH_RST)
+		return -1;
+	if (ti->ti_flags & TH_SYN)
+		tlen = 1;
+	if ((m = (mblk_t *)allocb(sizeof(struct tcpiphdr), BPRI_HI)) == NULL)
+		return -1;
+
+	MTYPE(m) = M_DATA;
+	m->b_wptr += sizeof(struct tcpiphdr);
+	bzero((char *)m->b_rptr, sizeof(struct tcpiphdr));
+	ip = (ip_t *)m->b_rptr;
+	tcp = (struct tcphdr *)(m->b_rptr + sizeof(*ip));
+
+	ip->ip_src.s_addr = ti->ti_dst.s_addr;
+	ip->ip_dst.s_addr = ti->ti_src.s_addr;
+	tcp->th_dport = ti->ti_sport;
+	tcp->th_sport = ti->ti_dport;
+	tcp->th_ack = htonl(ntohl(ti->ti_seq) + tlen);
+	tcp->th_off = sizeof(struct tcphdr) >> 2;
+	tcp->th_flags = TH_RST|TH_ACK;
+	/*
+	 * This is to get around a bug in the Solaris 2.4/2.5 TCP checksum
+	 * computation that is done by their put routine.
+	 */
+	tcp->th_sum = htons(0x14);
+	ip->ip_hl = sizeof(*ip) >> 2;
+	ip->ip_v = IPVERSION;
+	ip->ip_p = IPPROTO_TCP;
+	ip->ip_len = htons(sizeof(struct tcpiphdr));
+	ip->ip_tos = ((struct ip *)ti)->ip_tos;
+	ip->ip_off = 0;
+	ip->ip_ttl = 60;
+	ip->ip_sum = 0;
+	ip_wput(qif->qf_ill->ill_wq, m);
+	return 0;
+}
+
+
+int	icmp_error(q, ip, type, code, qif, src)
+queue_t	*q;
+ip_t	*ip;
+int	type, code;
+qif_t	*qif;
+struct	in_addr	src;
+{
+	mblk_t	*mb;
+	struct	icmp	*icmp;
+	ip_t	*nip;
+	int	sz = sizeof(*nip) + sizeof(*icmp) + 8;
+
+	if ((mb = (mblk_t *)allocb(sz, BPRI_HI)) == NULL)
+		return -1;
+	MTYPE(mb) = M_DATA;
+	mb->b_wptr += sz;
+	bzero((char *)mb->b_rptr, sz);
+	nip = (ip_t *)mb->b_rptr;
+	icmp = (struct icmp *)(nip + 1);
+
+	nip->ip_v = IPVERSION;
+	nip->ip_hl = (sizeof(*nip) >> 2);
+	nip->ip_p = IPPROTO_ICMP;
+	nip->ip_id = ip->ip_id;
+	nip->ip_sum = 0;
+	nip->ip_ttl = 60;
+	nip->ip_tos = ip->ip_tos;
+	nip->ip_len = htons(sz);
+	nip->ip_src.s_addr = ip->ip_dst.s_addr;
+	nip->ip_dst.s_addr = ip->ip_src.s_addr;
+
+	icmp->icmp_type = type;
+	icmp->icmp_code = code;
+	icmp->icmp_cksum = 0;
+	bcopy((char *)ip, (char *)&icmp->icmp_ip, sizeof(*ip));
+	bcopy((char *)ip + (ip->ip_hl << 2),
+	      (char *)&icmp->icmp_ip + sizeof(*ip), 8);	/* 64 bits */
+	icmp->icmp_cksum = ipf_cksum(icmp, sizeof(*icmp) + 8);
+	ip_wput(qif->qf_ill->ill_wq, mb);
+	return 0;
+}
diff --git a/contrib/ipfilter/ip_state.c b/contrib/ipfilter/ip_state.c
new file mode 100644
index 0000000..62a49aa
--- /dev/null
+++ b/contrib/ipfilter/ip_state.c
@@ -0,0 +1,536 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ip_state.c	1.8 6/5/96 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: ip_state.c,v 2.0.1.2 1997/01/09 15:22:45 darrenr Exp $";
+#endif
+
+#if !defined(_KERNEL) && !defined(KERNEL)
+# include <stdlib.h>
+# include <string.h>
+#endif
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#ifdef	_KERNEL
+# include <sys/systm.h>
+#endif
+#if !defined(__SVR4) && !defined(__svr4__)
+# include <sys/mbuf.h>
+#else
+# include <sys/byteorder.h>
+# include <sys/dditypes.h>
+# include <sys/stream.h>
+# include <sys/kmem.h>
+#endif
+
+#include <net/if.h>
+#ifdef sun
+#include <net/af.h>
+#endif
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcp_fsm.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include "ip_state.h"
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+void set_tcp_age();
+
+#define	TCP_CLOSE	(TH_FIN|TH_RST)
+
+ipstate_t *ips_table[IPSTATE_SIZE];
+int	ips_num = 0;
+ips_stat_t ips_stats;
+#if	SOLARIS
+extern	kmutex_t	ipf_state;
+# if	!defined(_KERNEL)
+#define	bcopy(a,b,c)	memmove(b,a,c)
+# endif
+#endif
+
+
+#define	FIVE_DAYS	(2 * 5 * 86400)	/* 5 days: half closed session */
+
+u_long	fr_tcpidletimeout = FIVE_DAYS,
+	fr_tcpclosewait = 60,
+	fr_tcplastack = 20,
+	fr_tcptimeout = 120,
+	fr_tcpclosed = 1,
+	fr_udptimeout = 120,
+	fr_icmptimeout = 120;
+
+
+ips_stat_t *fr_statetstats()
+{
+	ips_stats.iss_active = ips_num;
+	ips_stats.iss_table = ips_table;
+	return &ips_stats;
+}
+
+
+#define	PAIRS(s1,d1,s2,d2)	((((s1) == (s2)) && ((d1) == (d2))) ||\
+				 (((s1) == (d2)) && ((d1) == (s2))))
+#define	IPPAIR(s1,d1,s2,d2)	PAIRS((s1).s_addr, (d1).s_addr, \
+				      (s2).s_addr, (d2).s_addr)
+
+/*
+ * Create a new ipstate structure and hang it off the hash table.
+ */
+int fr_addstate(ip, fin, pass)
+ip_t *ip;
+fr_info_t *fin;
+u_int pass;
+{
+	ipstate_t ips;
+	register ipstate_t *is = &ips;
+	register u_int hv;
+
+	if ((ip->ip_off & 0x1fff) || (fin->fin_fi.fi_fl & FI_SHORT))
+		return -1;
+	if (ips_num == IPSTATE_MAX) {
+		ips_stats.iss_max++;
+		return -1;
+	}
+	ips.is_age = 1;
+	ips.is_state[0] = 0;
+	ips.is_state[1] = 0;
+	/*
+	 * Copy and calculate...
+	 */
+	hv = (is->is_p = ip->ip_p);
+	hv += (is->is_src.s_addr = ip->ip_src.s_addr);
+	hv += (is->is_dst.s_addr = ip->ip_dst.s_addr);
+
+	switch (ip->ip_p)
+	{
+	case IPPROTO_ICMP :
+	    {
+		struct icmp *ic = (struct icmp *)fin->fin_dp;
+
+		switch (ic->icmp_type)
+		{
+		case ICMP_ECHO :
+			is->is_icmp.ics_type = 0;
+			hv += (is->is_icmp.ics_id = ic->icmp_id);
+			hv += (is->is_icmp.ics_seq = ic->icmp_seq);
+			break;
+		case ICMP_TSTAMP :
+		case ICMP_IREQ :
+		case ICMP_MASKREQ :
+			is->is_icmp.ics_type = ic->icmp_type + 1;
+			break;
+		default :
+			return -1;
+		}
+		ips_stats.iss_icmp++;
+		is->is_age = fr_icmptimeout;
+		break;
+	    }
+	case IPPROTO_TCP :
+	    {
+		register tcphdr_t *tcp = (tcphdr_t *)fin->fin_dp;
+
+		/*
+		 * The endian of the ports doesn't matter, but the ack and
+		 * sequence numbers do as we do mathematics on them later.
+		 */
+		hv += (is->is_dport = tcp->th_dport);
+		hv += (is->is_sport = tcp->th_sport);
+		is->is_seq = ntohl(tcp->th_seq);
+		is->is_ack = ntohl(tcp->th_ack);
+		is->is_swin = ntohs(tcp->th_win);
+		is->is_dwin = is->is_swin;	/* start them the same */
+		ips_stats.iss_tcp++;
+		/*
+		 * If we're creating state for a starting connectoin, start the
+		 * timer on it as we'll never see an error if it fails to
+		 * connect.
+		 */
+		if ((tcp->th_flags & (TH_SYN|TH_ACK)) == TH_SYN)
+			is->is_ack = 0;	/* Trumpet WinSock 'ism */
+		set_tcp_age(&is->is_age, is->is_state, ip, fin,
+			    tcp->th_sport == is->is_sport);
+		break;
+	    }
+	case IPPROTO_UDP :
+	    {
+		register tcphdr_t *tcp = (tcphdr_t *)fin->fin_dp;
+
+		hv += (is->is_dport = tcp->th_dport);
+		hv += (is->is_sport = tcp->th_sport);
+		ips_stats.iss_udp++;
+		is->is_age = fr_udptimeout;
+		break;
+	    }
+	default :
+		return -1;
+	}
+
+	if (!(is = (ipstate_t *)KMALLOC(sizeof(*is)))) {
+		ips_stats.iss_nomem++;
+		return -1;
+	}
+	bcopy((char *)&ips, (char *)is, sizeof(*is));
+	hv %= IPSTATE_SIZE;
+	MUTEX_ENTER(&ipf_state);
+	is->is_next = ips_table[hv];
+	ips_table[hv] = is;
+	is->is_pass = pass;
+	if (pass & FR_LOGFIRST)
+		is->is_pass &= ~(FR_LOGFIRST|FR_LOG);
+	ips_num++;
+	MUTEX_EXIT(&ipf_state);
+	return 0;
+}
+
+
+/*
+ * check to see if a packet with TCP headers fits within the TCP window.
+ * change timeout depending on whether new packet is a SYN-ACK returning for a
+ * SYN or a RST or FIN which indicate time to close up shop.
+ */
+int fr_tcpstate(is, fin, ip, tcp, sport
+#ifndef	_KERNEL
+,isp)
+ipstate_t **isp;
+#else
+)
+#endif
+register ipstate_t *is;
+fr_info_t *fin;
+ip_t *ip;
+tcphdr_t *tcp;
+u_short sport;
+{
+	register int seqskew, ackskew;
+	register u_short swin, dwin;
+	register tcp_seq seq, ack;
+	int source;
+
+	/*
+	 * Find difference between last checked packet and this packet.
+	 */
+	seq = ntohl(tcp->th_seq);
+	ack = ntohl(tcp->th_ack);
+	if (sport == is->is_sport) {
+		seqskew = seq - is->is_seq;
+		ackskew = ack - is->is_ack;
+	} else {
+		seqskew = ack - is->is_seq;
+		if (!is->is_ack)
+			/*
+			 * Must be a SYN-ACK in reply to a SYN.
+			 */
+			is->is_ack = seq;
+		ackskew = seq - is->is_ack;
+	}
+
+	/*
+	 * Make skew values absolute
+	 */
+	if (seqskew < 0)
+		seqskew = -seqskew;
+	if (ackskew < 0)
+		ackskew = -ackskew;
+
+	/*
+	 * If the difference in sequence and ack numbers is within the
+	 * window size of the connection, store these values and match
+	 * the packet.
+	 */
+	if ((source = (sport == is->is_sport))) {
+		swin = is->is_swin;
+		dwin = is->is_dwin;
+	} else {
+		dwin = is->is_swin;
+		swin = is->is_dwin;
+	}
+
+	if ((seqskew <= swin) && (ackskew <= dwin)) {
+		if (source) {
+			is->is_seq = seq;
+			is->is_ack = ack;
+			is->is_swin = ntohs(tcp->th_win);
+		} else {
+			is->is_seq = ack;
+			is->is_ack = seq;
+			is->is_dwin = ntohs(tcp->th_win);
+		}
+		ips_stats.iss_hits++;
+		/*
+		 * Nearing end of connection, start timeout.
+		 */
+		set_tcp_age(&is->is_age, is->is_state, ip, fin,
+			    tcp->th_sport == is->is_sport);
+		return 1;
+	}
+	return 0;
+}
+
+
+/*
+ * Check if a packet has a registered state.
+ */
+int fr_checkstate(ip, fin)
+ip_t *ip;
+fr_info_t *fin;
+{
+	register struct in_addr dst, src;
+	register ipstate_t *is, **isp;
+	register u_char pr;
+	struct icmp *ic;
+	tcphdr_t *tcp;
+	u_int hv, hlen;
+
+	if ((ip->ip_off & 0x1fff) || (fin->fin_fi.fi_fl & FI_SHORT))
+		return 0;
+
+	hlen = fin->fin_hlen;
+	tcp = (tcphdr_t *)((char *)ip + hlen);
+	ic = (struct icmp *)tcp;
+	hv = (pr = ip->ip_p);
+	hv += (src.s_addr = ip->ip_src.s_addr);
+	hv += (dst.s_addr = ip->ip_dst.s_addr);
+
+	/*
+	 * Search the hash table for matching packet header info.
+	 */
+	switch (ip->ip_p)
+	{
+	case IPPROTO_ICMP :
+		hv += ic->icmp_id;
+		hv += ic->icmp_seq;
+		hv %= IPSTATE_SIZE;
+		MUTEX_ENTER(&ipf_state);
+		for (isp = &ips_table[hv]; (is = *isp); isp = &is->is_next)
+			if ((is->is_p == pr) &&
+			    (ic->icmp_id == is->is_icmp.ics_id) &&
+			    (ic->icmp_seq == is->is_icmp.ics_seq) &&
+			    IPPAIR(src, dst, is->is_src, is->is_dst)) {
+				/*
+				 * If we have type 0 stored, allow any icmp
+				 * replies through.
+				 */
+				if (is->is_icmp.ics_type &&
+				    is->is_icmp.ics_type != ic->icmp_type)
+					continue;
+				is->is_age = fr_icmptimeout;
+				ips_stats.iss_hits++;
+				MUTEX_EXIT(&ipf_state);
+				return is->is_pass;
+			}
+		MUTEX_EXIT(&ipf_state);
+		break;
+	case IPPROTO_TCP :
+	    {
+		register u_short dport = tcp->th_dport, sport = tcp->th_sport;
+
+		hv += dport;
+		hv += sport;
+		hv %= IPSTATE_SIZE;
+		MUTEX_ENTER(&ipf_state);
+		for (isp = &ips_table[hv]; (is = *isp); isp = &is->is_next) {
+			if ((is->is_p == pr) &&
+			    PAIRS(sport, dport, is->is_sport, is->is_dport) &&
+			    IPPAIR(src, dst, is->is_src, is->is_dst))
+				if (fr_tcpstate(is, fin, ip, tcp, sport)) {
+#ifdef	_KERNEL
+					MUTEX_EXIT(&ipf_state);
+					return is->is_pass;
+#else
+					int pass = is->is_pass;
+
+					if (tcp->th_flags & TCP_CLOSE) {
+						*isp = is->is_next;
+						isp = &ips_table[hv];
+						KFREE(is);
+					}
+					return pass;
+#endif
+				}
+		}
+		MUTEX_EXIT(&ipf_state);
+		break;
+	    }
+	case IPPROTO_UDP :
+	    {
+		register u_short dport = tcp->th_dport, sport = tcp->th_sport;
+
+		hv += dport;
+		hv += sport;
+		hv %= IPSTATE_SIZE;
+		/*
+		 * Nothing else to match on but ports. and IP#'s
+		 */
+		MUTEX_ENTER(&ipf_state);
+		for (is = ips_table[hv]; is; is = is->is_next)
+			if ((is->is_p == pr) &&
+			    PAIRS(sport, dport, is->is_sport, is->is_dport) &&
+			    IPPAIR(src, dst, is->is_src, is->is_dst)) {
+				ips_stats.iss_hits++;
+				is->is_age = fr_udptimeout;
+				MUTEX_EXIT(&ipf_state);
+				return is->is_pass;
+			}
+		MUTEX_EXIT(&ipf_state);
+		break;
+	    }
+	default :
+		break;
+	}
+	ips_stats.iss_miss++;
+	return 0;
+}
+
+
+/*
+ * Free memory in use by all state info. kept.
+ */
+void fr_stateunload()
+{
+	register int i;
+	register ipstate_t *is, **isp;
+
+	MUTEX_ENTER(&ipf_state);
+	for (i = 0; i < IPSTATE_SIZE; i++)
+		for (isp = &ips_table[i]; (is = *isp); ) {
+			*isp = is->is_next;
+			KFREE(is);
+		}
+	MUTEX_EXIT(&ipf_state);
+}
+
+
+/*
+ * Slowly expire held state for thingslike UDP and ICMP.  Timeouts are set
+ * in expectation of this being called twice per second.
+ */
+void fr_timeoutstate()
+{
+	register int i;
+	register ipstate_t *is, **isp;
+
+	MUTEX_ENTER(&ipf_state);
+	for (i = 0; i < IPSTATE_SIZE; i++)
+		for (isp = &ips_table[i]; (is = *isp); )
+			if (is->is_age && !--is->is_age) {
+				*isp = is->is_next;
+				if (is->is_p == IPPROTO_TCP)
+					ips_stats.iss_fin++;
+				else
+					ips_stats.iss_expire++;
+				KFREE(is);
+				ips_num--;
+			} else
+				isp = &is->is_next;
+	MUTEX_EXIT(&ipf_state);
+}
+
+
+/*
+ * Original idea freom Pradeep Krishnan for use primarily with NAT code.
+ * (pkrishna@netcom.com)
+ */
+void set_tcp_age(age, state, ip, fin, dir)
+int *age;
+u_char *state;
+ip_t *ip;
+fr_info_t *fin;
+int dir;
+{
+	tcphdr_t *tcp = (tcphdr_t *)fin->fin_dp;
+	u_char flags = tcp->th_flags;
+	int dlen, ostate;
+
+	ostate = state[1 - dir];
+
+	dlen = ip->ip_len - fin->fin_hlen - (tcp->th_off << 2);
+
+	if (flags & TH_RST) {
+		if (!(tcp->th_flags & TH_PUSH) && !dlen) {
+			*age = fr_tcpclosed;
+			state[dir] = TCPS_CLOSED;
+		} else {
+			*age = fr_tcpclosewait;
+			state[dir] = TCPS_CLOSE_WAIT;
+		}
+		return;
+	}
+
+	*age = fr_tcptimeout; /* 1 min */
+
+	switch(state[dir])
+	{
+	case TCPS_FIN_WAIT_2:
+	case TCPS_CLOSED:
+		if ((flags & TH_OPENING) == TH_OPENING)
+			state[dir] = TCPS_SYN_RECEIVED;
+		else if (flags & TH_SYN)
+			state[dir] = TCPS_SYN_SENT;
+		break;
+	case TCPS_SYN_RECEIVED:
+		if ((flags & (TH_FIN|TH_ACK)) == TH_ACK) {
+			state[dir] = TCPS_ESTABLISHED;
+			*age = fr_tcpidletimeout;
+		}
+		break;
+	case TCPS_SYN_SENT:
+		if ((flags & (TH_FIN|TH_ACK)) == TH_ACK) {
+			state[dir] = TCPS_ESTABLISHED;
+			*age = fr_tcpidletimeout;
+		}
+		break;
+	case TCPS_ESTABLISHED:
+		if (flags & TH_FIN) {
+			state[dir] = TCPS_CLOSE_WAIT;
+			if (!(flags & TH_PUSH) && !dlen &&
+			    ostate > TCPS_ESTABLISHED)
+				*age  = fr_tcplastack;
+			else
+				*age  = fr_tcpclosewait;
+		} else
+			*age = fr_tcpidletimeout;
+		break;
+	case TCPS_CLOSE_WAIT:
+		if ((flags & TH_FIN) && !(flags & TH_PUSH) && !dlen &&
+		    ostate > TCPS_ESTABLISHED) {
+			*age  = fr_tcplastack;
+			state[dir] = TCPS_LAST_ACK;
+		} else
+			*age  = fr_tcpclosewait;
+		break;
+	case TCPS_LAST_ACK:
+		if (flags & TH_ACK) {
+			state[dir] = TCPS_FIN_WAIT_2;
+			if (!(flags & TH_PUSH) && !dlen &&
+			    ostate > TCPS_ESTABLISHED)
+				*age  = fr_tcplastack;
+			else {
+				*age  = fr_tcpclosewait;
+				state[dir] = TCPS_CLOSE_WAIT;
+			}
+		}
+		break;
+	}
+}
diff --git a/contrib/ipfilter/ip_state.h b/contrib/ipfilter/ip_state.h
new file mode 100644
index 0000000..ee30b98
--- /dev/null
+++ b/contrib/ipfilter/ip_state.h
@@ -0,0 +1,86 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ip_state.h	1.3 1/12/96 (C) 1995 Darren Reed
+ * $Id: ip_state.h,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $
+ */
+#ifndef	__IP_STATE_H__
+#define	__IP_STATE_H__
+
+#define	IPSTATE_SIZE	257
+#define	IPSTATE_MAX	2048	/* Maximum number of states held */
+
+typedef struct udpstate {
+	u_short	us_sport;
+	u_short	us_dport;
+} udpstate_t;
+
+typedef struct icmpstate {
+	u_short	ics_id;
+	u_short	ics_seq;
+	u_char	ics_type;
+} icmpstate_t;
+
+typedef	struct tcpstate {
+	u_short	ts_sport;
+	u_short	ts_dport;
+	u_long	ts_seq;
+	u_long	ts_ack;
+	u_short	ts_swin;
+	u_short	ts_dwin;
+	u_char	ts_state[2];
+} tcpstate_t;
+
+typedef struct ipstate {
+	struct	ipstate	*is_next;
+	int	is_age;
+	u_int	is_pass;
+	struct	in_addr	is_src;
+	struct	in_addr	is_dst;
+	u_char	is_p;
+	u_char	is_flags;
+	union {
+		icmpstate_t	is_ics;
+		tcpstate_t	is_ts;
+		udpstate_t	is_us;
+	} is_ps;
+} ipstate_t;
+
+#define	is_icmp	is_ps.is_ics
+#define	is_tcp	is_ps.is_ts
+#define	is_udp	is_ps.is_us
+#define	is_seq	is_tcp.ts_seq
+#define	is_ack	is_tcp.ts_ack
+#define	is_dwin	is_tcp.ts_dwin
+#define	is_swin	is_tcp.ts_swin
+#define	is_sport	is_tcp.ts_sport
+#define	is_dport	is_tcp.ts_dport
+#define	is_state	is_tcp.ts_state
+
+#define	TH_OPENING	(TH_SYN|TH_ACK)
+
+typedef	struct	ips_stat {
+	u_long	iss_hits;
+	u_long	iss_miss;
+	u_long	iss_max;
+	u_long	iss_tcp;
+	u_long	iss_udp;
+	u_long	iss_icmp;
+	u_long	iss_nomem;
+	u_long	iss_expire;
+	u_long	iss_fin;
+	u_long	iss_active;
+	ipstate_t **iss_table;
+} ips_stat_t;
+
+extern ips_stat_t *fr_statetstats();
+extern int fr_addstate(), fr_checkstate();
+extern void fr_timeoutstate(), set_tcp_age();
+# ifdef	_KERNEL
+extern void fr_stateunload();
+# endif
+#endif /* __IP_STATE_H__ */
diff --git a/contrib/ipfilter/ipf.c b/contrib/ipfilter/ipf.c
new file mode 100644
index 0000000..da6baa2
--- /dev/null
+++ b/contrib/ipfilter/ipf.c
@@ -0,0 +1,434 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#if !defined(__SVR4) && !defined(__GNUC__)
+#include <strings.h>
+#endif
+#if !defined(__SVR4) && defined(__GNUC__)
+extern	char	*index();
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <net/if.h>
+#include <netinet/ip.h>
+#include "ip_fil.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include "ipf.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipf.c	1.23 6/5/96 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: ipf.c,v 2.0.1.2 1997/02/04 14:37:46 darrenr Exp $";
+#endif
+
+#if	SOLARIS
+void	frsync(), blockunknown();
+#endif
+void	zerostats();
+
+extern	char	*optarg;
+
+int	opts = 0;
+
+static	int	fd = -1;
+
+static	void	procfile(), flushfilter(), set_state();
+static	void	packetlogon(), swapactive(), showstats();
+static	char   *getline();
+
+int main(argc,argv)
+int argc;
+char *argv[];
+{
+	char	c;
+
+	while ((c = getopt(argc, argv, "AdDEf:F:Il:noprsUvyzZ")) != -1) {
+		switch (c)
+		{
+		case 'E' :
+			set_state(1);
+			break;
+		case 'D' :
+			set_state(0);
+			break;
+		case 'A' :
+			opts &= ~OPT_INACTIVE;
+			break;
+		case 'd' :
+			opts |= OPT_DEBUG;
+			break;
+		case 'f' :
+			procfile(argv[0], optarg);
+			break;
+		case 'F' :
+			flushfilter(optarg);
+			break;
+		case 'I' :
+			opts |= OPT_INACTIVE;
+			break;
+		case 'l' :
+			packetlogon(optarg);
+			break;
+		case 'n' :
+			opts |= OPT_DONOTHING;
+			break;
+		case 'o' :
+			opts |= OPT_OUTQUE;
+			break;
+		case 'p' :
+			opts |= OPT_PRINTFR;
+			break;
+		case 'r' :
+			opts |= OPT_REMOVE;
+			break;
+		case 's' :
+			swapactive();
+			break;
+#if SOLARIS
+		case 'U' :
+			blockunknown();
+			break;
+#endif
+		case 'v' :
+			opts |= OPT_VERBOSE;
+			break;
+#if SOLARIS
+		case 'y' :
+			frsync();
+			break;
+#endif
+		case 'z' :
+			opts |= OPT_ZERORULEST;
+			break;
+		case 'Z' :
+			zerostats();
+			break;
+		}
+	}
+
+	if (fd != -1)
+		(void) close(fd);
+
+	exit(0);
+	/* NOTREACHED */
+}
+
+
+static int opendevice()
+{
+	if (opts & OPT_DONOTHING)
+		return -2;
+
+	if (!(opts & OPT_DONOTHING) && fd == -1)
+		if ((fd = open(IPL_NAME, O_RDWR)) == -1)
+			if ((fd = open(IPL_NAME, O_RDONLY)) == -1)
+				perror("open device");
+	return fd;
+}
+
+
+static	void	set_state(enable)
+u_int	enable;
+{
+	if (opendevice() != -2)
+		if (ioctl(fd, SIOCFRENB, &enable) == -1)
+			perror("SIOCFRENB");
+	return;
+}
+
+static	void	procfile(name, file)
+char	*name, *file;
+{
+	FILE	*fp;
+	char	line[513], *s;
+	struct	frentry	*fr;
+	u_int	add = SIOCADAFR, del = SIOCRMAFR;
+
+	(void) opendevice();
+
+	if (opts & OPT_INACTIVE) {
+		add = SIOCADIFR;
+		del = SIOCRMIFR;
+	}
+	if (opts & OPT_DEBUG)
+		printf("add %x del %x\n", add, del);
+
+	initparse();
+
+	if (!strcmp(file, "-"))
+		fp = stdin;
+	else if (!(fp = fopen(file, "r"))) {
+		fprintf(stderr, "%s: fopen(%s) failed: %s\n", name, file,
+			STRERROR(errno));
+		exit(1);
+	}
+
+	while (getline(line, sizeof(line)-1, fp)) {
+		/*
+		 * treat both CR and LF as EOL
+		 */
+		if ((s = index(line, '\n')))
+			*s = '\0';
+		if ((s = index(line, '\r')))
+			*s = '\0';
+		/*
+		 * # is comment marker, everything after is a ignored
+		 */
+		if ((s = index(line, '#')))
+			*s = '\0';
+
+		if (!*line)
+			continue;
+
+		if (opts & OPT_VERBOSE)
+			(void)fprintf(stderr, "[%s]\n",line);
+
+		fr = parse(line);
+		(void)fflush(stdout);
+
+		if (fr) {
+			if (opts & OPT_ZERORULEST)
+				add = SIOCZRLST;
+			else if (opts & OPT_INACTIVE)
+				add = fr->fr_hits ? SIOCINIFR : SIOCADIFR;
+			else
+				add = fr->fr_hits ? SIOCINAFR : SIOCADAFR;
+			if (fr->fr_hits)
+				fr->fr_hits--;
+			if (fr && (opts & OPT_VERBOSE))
+				printfr(fr);
+			if (fr && (opts & OPT_OUTQUE))
+				fr->fr_flags |= FR_OUTQUE;
+
+			if (opts & OPT_DEBUG)
+				binprint(fr);
+
+			if ((opts & OPT_ZERORULEST) &&
+			    !(opts & OPT_DONOTHING)) {
+				if (ioctl(fd, add, fr) == -1)
+					perror("ioctl(SIOCZRLST)");
+				else {
+					printf("hits %ld bytes %ld ",
+						fr->fr_hits, fr->fr_bytes);
+					printfr(fr);
+				}
+			} else if ((opts & OPT_REMOVE) &&
+				   !(opts & OPT_DONOTHING)) {
+				if (ioctl(fd, del, fr) == -1)
+					perror("ioctl(SIOCDELFR)");
+			} else if (!(opts & OPT_DONOTHING)) {
+				if (ioctl(fd, add, fr) == -1)
+					perror("ioctl(SIOCADDFR)");
+			}
+		}
+	}
+	(void)fclose(fp);
+}
+
+/*
+ * Similar to fgets(3) but can handle '\\'
+ */
+static char *getline(str, size, file)
+register char	*str;
+size_t	size;
+FILE	*file;
+{
+	register char *p;
+
+	do {
+		for (p = str;; p+= strlen(p) - 1) {
+			if (!fgets(p, size, file))
+				return(NULL);
+			p[strlen(p) -1] = '\0';
+			if (p[strlen(p) - 1] != '\\')
+				break;
+		}
+	} while (*str == '\0' || *str == '\n');
+	return(str);
+}
+
+
+static void packetlogon(opt)
+char	*opt;
+{
+	int	err, flag = 0;
+
+	if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
+		if ((err = ioctl(fd, SIOCGETFF, &flag)))
+			perror("ioctl(SIOCGETFF)");
+
+		printf("log flag is currently %#x\n", flag);
+	}
+
+	flag &= ~(FF_LOGPASS|FF_LOGNOMATCH|FF_LOGBLOCK);
+
+	if (index(opt, 'p')) {
+		flag |= FF_LOGPASS;
+		if (opts & OPT_VERBOSE)
+			printf("set log flag: pass\n");
+	}
+	if (index(opt, 'm') && (*opt == 'n' || *opt == 'N')) {
+		flag |= FF_LOGNOMATCH;
+		if (opts & OPT_VERBOSE)
+			printf("set log flag: nomatch\n");
+	}
+	if (index(opt, 'b') || index(opt, 'd')) {
+		flag |= FF_LOGBLOCK;
+		if (opts & OPT_VERBOSE)
+			printf("set log flag: block\n");
+	}
+
+	if (opendevice() != -2 && (err = ioctl(fd, SIOCSETFF, &flag)))
+		perror("ioctl(SIOCSETFF)");
+
+	if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
+		if ((err = ioctl(fd, SIOCGETFF, &flag)))
+			perror("ioctl(SIOCGETFF)");
+
+		printf("log flag is now %#x\n", flag);
+	}
+}
+
+
+static	void	flushfilter(arg)
+char	*arg;
+{
+	int	fl = 0, rem;
+
+	if (!arg || !*arg)
+		return;
+	if (strchr(arg, 'i') || strchr(arg, 'I'))
+		fl = FR_INQUE;
+	if (strchr(arg, 'o') || strchr(arg, 'O'))
+		fl = FR_OUTQUE;
+	if (strchr(arg, 'a') || strchr(arg, 'A'))
+		fl = FR_OUTQUE|FR_INQUE;
+	fl |= (opts & FR_INACTIVE);
+	rem = fl;
+
+	if (opendevice() != -2 && ioctl(fd, SIOCIPFFL, &fl) == -1)
+		perror("ioctl(SIOCIPFFL)");
+	if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
+		printf("remove flags %s%s (%d)\n", (rem & FR_INQUE) ? "I" : "",
+			(rem & FR_OUTQUE) ? "O" : "", rem);
+		printf("removed %d filter rules\n", fl);
+	}
+	return;
+}
+
+
+static void swapactive()
+{
+	int in = 2;
+
+	if (opendevice() != -2 && ioctl(fd, SIOCSWAPA, &in) == -1)
+		perror("ioctl(SIOCSWAPA)");
+	else
+		printf("Set %d now inactive\n", in);
+}
+
+
+#if defined(sun) && (defined(__SVR4) || defined(__svr4__))
+void frsync()
+{
+	if (opendevice() != -2 && ioctl(fd, SIOCFRSYN, 0) == -1)
+		perror("SIOCFRSYN");
+	else
+		printf("filter sync'd\n");
+}
+#endif
+
+
+void zerostats()
+{
+	friostat_t	fio;
+
+	if (opendevice() != -2) {
+		if (ioctl(fd, SIOCFRZST, &fio) == -1) {
+			perror("ioctl(SIOCFRZST)");
+			exit(-1);
+		}
+		showstats(&fio);
+	}
+
+}
+
+
+/*
+ * read the kernel stats for packets blocked and passed
+ */
+static void showstats(fp)
+friostat_t	*fp;
+{
+#if SOLARIS
+	printf("dropped packets:\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_drop, fp->f_st[1].fr_drop);
+	printf("non-ip packets:\t\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_notip, fp->f_st[1].fr_notip);
+	printf("   bad packets:\t\tin %lu\tout %lu\n",
+			fp->f_st[0].fr_bad, fp->f_st[1].fr_bad);
+#endif
+	printf(" input packets:\t\tblocked %lu passed %lu nomatch %lu",
+			fp->f_st[0].fr_block, fp->f_st[0].fr_pass,
+			fp->f_st[0].fr_nom);
+	printf(" counted %lu\n", fp->f_st[0].fr_acct);
+	printf("output packets:\t\tblocked %lu passed %lu nomatch %lu",
+			fp->f_st[1].fr_block, fp->f_st[1].fr_pass,
+			fp->f_st[1].fr_nom);
+	printf(" counted %lu\n", fp->f_st[0].fr_acct);
+	printf(" input packets logged:\tblocked %lu passed %lu\n",
+			fp->f_st[0].fr_bpkl, fp->f_st[0].fr_ppkl);
+	printf("output packets logged:\tblocked %lu passed %lu\n",
+			fp->f_st[1].fr_bpkl, fp->f_st[1].fr_ppkl);
+	printf(" packets logged:\tinput %lu-%lu output %lu-%lu\n",
+			fp->f_st[0].fr_pkl, fp->f_st[0].fr_skip,
+			fp->f_st[1].fr_pkl, fp->f_st[1].fr_skip);
+}
+
+
+#if SOLARIS
+void blockunknown()
+{
+	int	flag;
+
+	if (opendevice() == -1)
+		return;
+
+	if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
+		if (ioctl(fd, SIOCGETFF, &flag))
+			perror("ioctl(SIOCGETFF)");
+
+		printf("log flag is currently %#x\n", flag);
+	}
+
+	flag ^= FF_BLOCKNONIP;
+
+	if (opendevice() != -2 && ioctl(fd, SIOCSETFF, &flag))
+		perror("ioctl(SIOCSETFF)");
+
+	if ((opts & (OPT_DONOTHING|OPT_VERBOSE)) == OPT_VERBOSE) {
+		if (ioctl(fd, SIOCGETFF, &flag))
+			perror("ioctl(SIOCGETFF)");
+
+		printf("log flag is now %#x\n", flag);
+	}
+}
+#endif
diff --git a/contrib/ipfilter/ipf.h b/contrib/ipfilter/ipf.h
new file mode 100644
index 0000000..3ac76fc
--- /dev/null
+++ b/contrib/ipfilter/ipf.h
@@ -0,0 +1,67 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ipf.h	1.12 6/5/96
+ * $Id: ipf.h,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $
+ */
+
+#ifndef	SOLARIS
+#define	SOLARIS	(defined(sun) && (defined(__svr4__) || defined(__SVR4)))
+#endif
+#define	OPT_REMOVE	0x00001
+#define	OPT_DEBUG	0x00002
+#define	OPT_OUTQUE	FR_OUTQUE	/* 0x0004 */
+#define	OPT_INQUE	FR_INQUE	/* 0x0008 */
+#define	OPT_LOG		FR_LOG		/* 0x0010 */
+#define	OPT_SHOWLIST	0x00020
+#define	OPT_VERBOSE	0x00040
+#define	OPT_DONOTHING	0x00080
+#define	OPT_HITS	0x00100
+#define	OPT_BRIEF	0x00200
+#define OPT_ACCNT	FR_ACCOUNT	/* 0x0400 */
+#define	OPT_FRSTATES	FR_KEEPFRAG	/* 0x0800 */
+#define	OPT_IPSTATES	FR_KEEPSTATE	/* 0x1000 */
+#define	OPT_INACTIVE	FR_INACTIVE	/* 0x2000 */
+#define	OPT_SHOWLINENO	0x04000
+#define	OPT_PRINTFR	0x08000
+#define	OPT_ZERORULEST	0x10000
+
+extern	struct	frentry	*parse();
+
+extern	void	printfr(), binprint(), initparse();
+
+#if defined(__SVR4) || defined(__svr4__)
+#define	index	strchr
+#define	bzero(a,b)	memset(a, 0, b)
+#define	bcopy(a,b,c)	memmove(b,a,c)
+#endif
+
+struct	ipopt_names	{
+	int	on_value;
+	int	on_bit;
+	int	on_siz;
+	char	*on_name;
+};
+
+
+extern	u_long	hostnum(), optname();
+extern	void	printpacket();
+#if SOLARIS
+extern	int	inet_aton();
+#endif
+
+#ifdef	sun
+#define	STRERROR(x)	sys_errlist[x]
+extern	char	*sys_errlist[];
+#else
+#define	STRERROR(x)	strerror(x)
+#endif
+
+#ifndef	MIN
+#define	MIN(a,b)	((a) > (b) ? (b) : (a))
+#endif
+
diff --git a/contrib/ipfilter/ipft_ef.c b/contrib/ipfilter/ipft_ef.c
new file mode 100644
index 0000000..2c4cc0f
--- /dev/null
+++ b/contrib/ipfilter/ipft_ef.c
@@ -0,0 +1,148 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+/*
+                                            icmp type
+ lnth proto         source     destination   src port   dst port
+
+etherfind -n
+
+   60  tcp   128.250.20.20  128.250.133.13       2419     telnet
+
+etherfind -n -t
+
+ 0.32    91   04    131.170.1.10  128.250.133.13
+ 0.33   566  udp  128.250.37.155   128.250.133.3        901        901
+*/
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__GNUC__)
+#include <strings.h>
+#endif
+#include <sys/types.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include <netdb.h>
+#include "ipf.h"
+#include "ipt.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)ipft_ef.c	1.6 2/4/96 (C)1995 Darren Reed";
+static	char	rcsid[] = "$Id: ipft_ef.c,v 2.0.1.1 1997/01/09 15:14:43 darrenr Exp $";
+#endif
+
+static	int	etherf_open(), etherf_close(), etherf_readip();
+
+struct	ipread	etherf = { etherf_open, etherf_close, etherf_readip };
+
+static	FILE	*efp = NULL;
+static	int	efd = -1;
+
+
+static	int	etherf_open(fname)
+char	*fname;
+{
+	if (efd != -1)
+		return efd;
+
+	if (!strcmp(fname, "-")) {
+		efd = 0;
+		efp = stdin;
+	} else {
+		efd = open(fname, O_RDONLY);
+		efp = fdopen(efd, "r");
+	}
+	return efd;
+}
+
+
+static	int	etherf_close()
+{
+	return close(efd);
+}
+
+
+static	int	etherf_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	struct	tcpiphdr pkt;
+	struct	ip	*ip = (struct ip *)&pkt;
+	struct	protoent *p = NULL;
+	char	src[16], dst[16], sprt[16], dprt[16];
+	char	lbuf[128], len[8], prot[8], time[8], *s;
+	int	slen, extra = 0, i, n;
+
+	if (!fgets(lbuf, sizeof(lbuf) - 1, efp))
+		return 0;
+
+	if ((s = strchr(lbuf, '\n')))
+		*s = '\0';
+	lbuf[sizeof(lbuf)-1] = '\0';
+
+	bzero(&pkt, sizeof(pkt));
+
+	if ((n = sscanf(lbuf, "%s %s %s %s %s %s", len, prot, src, dst,
+			sprt, dprt)) != 6)
+		if ((n = sscanf(lbuf, "%s %s %s %s %s %s %s", time,
+				len, prot, src, dst, sprt, dprt)) != 7)
+			return -1;
+
+	ip->ip_p = atoi(prot);
+	if (ip->ip_p == 0) {
+		if (!(p = getprotobyname(prot)))
+			return -1;
+		ip->ip_p = p->p_proto;
+	}
+
+	switch (ip->ip_p) {
+	case IPPROTO_TCP :
+	case IPPROTO_UDP :
+		s = strtok(NULL, " :");
+		ip->ip_len += atoi(s);
+		if (p->p_proto == IPPROTO_TCP)
+			extra = sizeof(struct tcphdr);
+		else if (p->p_proto == IPPROTO_UDP)
+			extra = sizeof(struct udphdr);
+		break;
+#ifdef	IGMP
+	case IPPROTO_IGMP :
+		extra = sizeof(struct igmp);
+		break;
+#endif
+	case IPPROTO_ICMP :
+		extra = sizeof(struct icmp);
+		break;
+	default :
+		break;
+	}
+
+	(void) inet_aton(src, &ip->ip_src);
+	(void) inet_aton(dst, &ip->ip_dst);
+	ip->ip_len = atoi(len);
+	ip->ip_hl = sizeof(struct ip);
+
+	slen = ip->ip_hl + extra;
+	i = MIN(cnt, slen);
+	bcopy((char *)&pkt, buf, i);
+	return i;
+}
diff --git a/contrib/ipfilter/ipft_hx.c b/contrib/ipfilter/ipft_hx.c
new file mode 100644
index 0000000..26dbc83
--- /dev/null
+++ b/contrib/ipfilter/ipft_hx.c
@@ -0,0 +1,140 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include "ipf.h"
+#include "ipt.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipft_hx.c	1.1 3/9/96 (C) 1996 Darren Reed";
+static	char	rcsid[] = "$Id: ipft_hx.c,v 2.0.1.2 1997/02/04 13:57:56 darrenr Exp $";
+#endif
+
+extern	int	opts;
+extern	u_short	portnum();
+extern	u_long	buildopts();
+
+static	int	hex_open(), hex_close(), hex_readip();
+static	char	*readhex();
+
+struct	ipread	iphex = { hex_open, hex_close, hex_readip };
+static	FILE	*tfp = NULL;
+static	int	tfd = -1;
+
+static	int	hex_open(fname)
+char	*fname;
+{
+	if (tfp && tfd != -1) {
+		rewind(tfp);
+		return tfd;
+	}
+
+	if (!strcmp(fname, "-")) {
+		tfd = 0;
+		tfp = stdin;
+	} else {
+		tfd = open(fname, O_RDONLY);
+		if (tfd != -1)
+			tfp = fdopen(tfd, "r");
+	}
+	return tfd;
+}
+
+
+static	int	hex_close()
+{
+	int	cfd = tfd;
+
+	tfd = -1;
+	return close(cfd);
+}
+
+
+static	int	hex_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	register char *s;
+	struct	ip *ip;
+	char	line[513];
+
+ 	ip = (struct ip *)buf;
+	while (fgets(line, sizeof(line)-1, tfp)) {
+		if ((s = index(line, '\n'))) {
+			if (s == line)
+				return (char *)ip - buf;
+			*s = '\0';
+		}
+		if ((s = index(line, '#')))
+			*s = '\0';
+		if (!*line)
+			continue;
+		if (!(opts & OPT_BRIEF)) {
+			printf("input: %s\n", line);
+			fflush(stdout);
+		}
+		ip = (struct ip *)readhex(line, (char *)ip);
+	}
+	return -1;
+}
+
+
+static	char	*readhex(src, dst)
+register char	*src, *dst;
+{
+	int	state = 0;
+	char	c;
+
+	while ((c = *src++)) {
+		if (isspace(c)) {
+			if (state) {
+				dst++;
+				state = 0;
+			}
+			continue;
+		} else if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
+			   (c >= 'A' && c <= 'F')) {
+			c = isdigit(c) ? (c - '0') : (toupper(c) - 55);
+			if (state == 0) {
+				*dst = (c << 4);
+				state++;
+			} else {
+				*dst++ |= c;
+				state = 0;
+			}
+		} else
+			break;
+	}
+	return dst;
+}
diff --git a/contrib/ipfilter/ipft_pc.c b/contrib/ipfilter/ipft_pc.c
new file mode 100644
index 0000000..3d3d887
--- /dev/null
+++ b/contrib/ipfilter/ipft_pc.c
@@ -0,0 +1,224 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__GNUC__)
+#include <strings.h>
+#endif
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include "ipf.h"
+#include "ipt.h"
+#include "pcap.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	rcsid[] = "$Id: ipft_pc.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+struct	llc	{
+	int	lc_sz;	/* LLC header length */
+	int	lc_to;	/* LLC Type offset */
+	int	lc_tl;	/* LLC Type length */
+};
+
+/*
+ * While many of these maybe the same, some do have different header formats
+ * which make this useful.
+ */
+#define	DLT_MAX	10
+
+static	struct	llc	llcs[DLT_MAX+1] = {
+	{ 0, 0, 0 },	/* DLT_NULL */
+	{ 14, 12, 2 },	/* DLT_E10MB */
+	{ 0, 0, 0 },	/* DLT_EN3MB */
+	{ 0, 0, 0 },	/* DLT_AX25 */
+	{ 0, 0, 0 },	/* DLT_PRONET */
+	{ 0, 0, 0 },	/* DLT_CHAOS */
+	{ 0, 0, 0 },	/* DLT_IEEE802 */
+	{ 0, 0, 0 },	/* DLT_ARCNET */
+	{ 0, 0, 0 },	/* DLT_SLIP */
+	{ 0, 0, 0 },	/* DLT_PPP */
+	{ 0, 0, 0 }	/* DLT_FDDI */
+};
+
+static	int	pcap_open(), pcap_close(), pcap_readip();
+
+static	int	pfd = -1, s_type = -1, swapped = 0;
+
+struct	ipread	pcap = { pcap_open, pcap_close, pcap_readip };
+
+#define	SWAPLONG(y)	\
+	((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
+#define	SWAPSHORT(y)	\
+	( (((y)&0xff)<<8) | (((y)&0xff00)>>8) )
+
+static	void	swap_hdr(p)
+pcaphdr_t	*p;
+{
+	p->pc_v_maj = SWAPSHORT(p->pc_v_maj);
+	p->pc_v_min = SWAPSHORT(p->pc_v_min);
+	p->pc_zone = SWAPLONG(p->pc_zone);
+	p->pc_sigfigs = SWAPLONG(p->pc_sigfigs);
+	p->pc_slen = SWAPLONG(p->pc_slen);
+	p->pc_type = SWAPLONG(p->pc_type);
+}
+
+static	int	pcap_open(fname)
+char	*fname;
+{
+	pcaphdr_t ph;
+	int	fd;
+
+	if (pfd != -1)
+		return pfd;
+
+	if (!strcmp(fname, "-"))
+		fd = 0;
+	else if ((fd = open(fname, O_RDONLY)) == -1)
+		return -1;
+
+	if (read(fd, (char *)&ph, sizeof(ph)) != sizeof(ph))
+		return -2;
+
+	if (ph.pc_id != TCPDUMP_MAGIC) {
+		if (SWAPLONG(ph.pc_id) != TCPDUMP_MAGIC) {
+			(void) close(fd);
+			return -2;
+		}
+		swapped = 1;
+		swap_hdr(&ph);
+	}
+
+	if (ph.pc_v_maj != PCAP_VERSION_MAJ || ph.pc_type > DLT_MAX) {
+		(void) close(fd);
+		return -2;
+	}
+
+	pfd = fd;
+	s_type = ph.pc_type;
+	printf("opened pcap file %s:\n", fname);
+	printf("\tid: %08x version: %d.%d type: %d snap %d\n",
+		ph.pc_id, ph.pc_v_maj, ph.pc_v_min, ph.pc_type, ph.pc_slen);
+
+	return fd;
+}
+
+
+static	int	pcap_close()
+{
+	return close(pfd);
+}
+
+
+/*
+ * read in the header (and validate) which should be the first record
+ * in a pcap file.
+ */
+static	int	pcap_read_rec(rec)
+struct	pcap_pkthdr *rec;
+{
+	int	n, p;
+
+	if (read(pfd, (char *)rec, sizeof(*rec)) != sizeof(*rec))
+		return -2;
+
+	if (swapped) {
+		rec->ph_clen = SWAPLONG(rec->ph_clen);
+		rec->ph_len = SWAPLONG(rec->ph_len);
+		rec->ph_ts.tv_sec = SWAPLONG(rec->ph_ts.tv_sec);
+		rec->ph_ts.tv_usec = SWAPLONG(rec->ph_ts.tv_usec);
+	}
+	p = rec->ph_clen;
+	n = MIN(p, rec->ph_len);
+	if (!n || n < 0)
+		return -3;
+
+	return p;
+}
+
+
+#ifdef	notyet
+/*
+ * read an entire pcap packet record.  only the data part is copied into
+ * the available buffer, with the number of bytes copied returned.
+ */
+static	int	pcap_read(buf, cnt)
+char	*buf;
+int	cnt;
+{
+	struct	pcap_pkthdr rec;
+	static	char	*bufp = NULL;
+	int	i, n;
+
+	if ((i = pcap_read_rec(&rec)) <= 0)
+		return i;
+
+	if (!bufp)
+		bufp = malloc(i);
+	else
+		bufp = realloc(bufp, i);
+
+	if (read(pfd, bufp, i) != i)
+		return -2;
+
+	n = MIN(i, cnt);
+	bcopy(bufp, buf, n);
+	return n;
+}
+#endif
+
+
+/*
+ * return only an IP packet read into buf
+ */
+static	int	pcap_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	static	char	*bufp = NULL;
+	struct	pcap_pkthdr rec;
+	struct	llc	*l;
+	char	*s, ty[4];
+	int	i, n;
+
+	do {
+		if ((i = pcap_read_rec(&rec)) <= 0)
+			return i;
+
+		if (!bufp)
+			bufp = malloc(i);
+		else
+			bufp = realloc(bufp, i);
+		s = bufp;
+
+		if (read(pfd, s, i) != i)
+			return -2;
+
+		l = &llcs[s_type];
+		i -= l->lc_sz;
+		s += l->lc_to;
+		bcopy(s, ty, l->lc_tl);
+		s += l->lc_tl;
+	} while (ty[0] != 0x8 && ty[1] != 0);
+	n = MIN(i, cnt);
+	bcopy(s, buf, n);
+	return n;
+}
diff --git a/contrib/ipfilter/ipft_sn.c b/contrib/ipfilter/ipft_sn.c
new file mode 100644
index 0000000..3185b56
--- /dev/null
+++ b/contrib/ipfilter/ipft_sn.c
@@ -0,0 +1,206 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+/*
+ * Written to comply with the recent RFC 1761 from Sun.
+ */
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__GNUC__)
+#include <strings.h>
+#endif
+#include <sys/types.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include "ipf.h"
+#include "ipt.h"
+#include "snoop.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	rcsid[] = "$Id: ipft_sn.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+struct	llc	{
+	int	lc_sz;	/* LLC header length */
+	int	lc_to;	/* LLC Type offset */
+	int	lc_tl;	/* LLC Type length */
+};
+
+/*
+ * While many of these maybe the same, some do have different header formats
+ * which make this useful.
+ */
+static	struct	llc	llcs[SDL_MAX+1] = {
+	{ 0, 0, 0 },	/* SDL_8023 */
+	{ 0, 0, 0 },	/* SDL_8024 */
+	{ 0, 0, 0 },	/* SDL_8025 */
+	{ 0, 0, 0 },	/* SDL_8026 */
+	{ 14, 12, 2 },	/* SDL_ETHER */
+	{ 0, 0, 0 },	/* SDL_HDLC */
+	{ 0, 0, 0 },	/* SDL_CHSYNC */
+	{ 0, 0, 0 },	/* SDL_IBMCC */
+	{ 0, 0, 0 },	/* SDL_FDDI */
+	{ 0, 0, 0 },	/* SDL_OTHER */
+};
+
+static	int	snoop_open(), snoop_close(), snoop_readip();
+
+static	int	sfd = -1, s_type = -1;
+
+struct	ipread	snoop = { snoop_open, snoop_close, snoop_readip };
+
+
+static	int	snoop_open(fname)
+char	*fname;
+{
+	struct	snoophdr sh;
+	int	fd;
+
+	if (sfd != -1)
+		return sfd;
+
+	if (!strcmp(fname, "-"))
+		fd = 0;
+	else if ((fd = open(fname, O_RDONLY)) == -1)
+		return -1;
+
+	if (read(fd, (char *)&sh, sizeof(sh)) != sizeof(sh))
+		return -2;
+
+	if (sh.s_v != SNOOP_VERSION ||
+	    sh.s_type < 0 || sh.s_type > SDL_MAX) {
+		(void) close(fd);
+		return -2;
+	}
+
+	sfd = fd;
+	s_type = sh.s_type;
+	printf("opened snoop file %s:\n", fname);
+	printf("\tid: %8.8s version: %d type: %d\n", sh.s_id, sh.s_v, s_type);
+
+	return fd;
+}
+
+
+static	int	snoop_close()
+{
+	return close(sfd);
+}
+
+
+/*
+ * read in the header (and validate) which should be the first record
+ * in a snoop file.
+ */
+static	int	snoop_read_rec(rec)
+struct	snooppkt *rec;
+{
+	int	n, p;
+
+	if (read(sfd, (char *)rec, sizeof(*rec)) != sizeof(*rec))
+		return -2;
+
+	if (rec->sp_ilen > rec->sp_plen || rec->sp_plen < sizeof(*rec))
+		return -2;
+
+	p = rec->sp_plen - sizeof(*rec);
+	n = MIN(p, rec->sp_ilen);
+	if (!n || n < 0)
+		return -3;
+
+	return p;
+}
+
+
+#ifdef	notyet
+/*
+ * read an entire snoop packet record.  only the data part is copied into
+ * the available buffer, with the number of bytes copied returned.
+ */
+static	int	snoop_read(buf, cnt)
+char	*buf;
+int	cnt;
+{
+	struct	snooppkt rec;
+	static	char	*bufp = NULL;
+	int	i, n;
+
+	if ((i = snoop_read_rec(&rec)) <= 0)
+		return i;
+
+	if (!bufp)
+		bufp = malloc(i);
+	else
+		bufp = realloc(bufp, i);
+
+	if (read(sfd, bufp, i) != i)
+		return -2;
+
+	n = MIN(i, cnt);
+	bcopy(bufp, buf, n);
+	return n;
+}
+#endif
+
+
+/*
+ * return only an IP packet read into buf
+ */
+static	int	snoop_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	static	char	*bufp = NULL;
+	struct	snooppkt rec;
+	struct	llc	*l;
+	char	ty[4], *s;
+	int	i, n;
+
+	do {
+		if ((i = snoop_read_rec(&rec)) <= 0)
+			return i;
+
+		if (!bufp)
+			bufp = malloc(i);
+		else
+			bufp = realloc(bufp, i);
+		s = bufp;
+
+		if (read(sfd, s, i) != i)
+			return -2;
+
+		l = &llcs[s_type];
+		i -= l->lc_to;
+		s += l->lc_to;
+		/*
+		 * XXX - bogus assumption here on the part of the time field
+		 * that it won't be greater than 4 bytes and the 1st two will
+		 * have the values 8 and 0 for IP.  Should be a table of
+		 * these too somewhere.  Really only works for SDL_ETHER.
+		 */
+		bcopy(s, ty, l->lc_tl);
+	} while (ty[0] != 0x8 && ty[1] != 0);
+
+	i -= l->lc_tl;
+	s += l->lc_tl;
+	n = MIN(i, cnt);
+	bcopy(s, buf, n);
+
+	return n;
+}
diff --git a/contrib/ipfilter/ipft_td.c b/contrib/ipfilter/ipft_td.c
new file mode 100644
index 0000000..ecd2bad
--- /dev/null
+++ b/contrib/ipfilter/ipft_td.c
@@ -0,0 +1,184 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+/*
+tcpdump -n
+
+00:05:47.816843 128.231.76.76.3291 > 224.2.252.231.36573: udp 36 (encap)
+
+tcpdump -nq
+
+00:33:48.410771 192.73.213.11.1463 > 224.2.248.153.59360: udp 31 (encap)
+
+tcpdump -nqt
+
+128.250.133.13.23 > 128.250.20.20.2419: tcp 27
+
+tcpdump -nqtt
+
+123456789.1234567 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
+
+tcpdump -nqte
+
+8:0:20:f:65:f7 0:0:c:1:8a:c5 81: 128.250.133.13.23 > 128.250.20.20.2419: tcp 27
+
+*/
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__GNUC__)
+#include <strings.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include <netdb.h>
+#include "ipf.h"
+#include "ipt.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)ipft_td.c	1.8 2/4/96 (C)1995 Darren Reed";
+static	char	rcsid[] = "$Id: ipft_td.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+static	int	tcpd_open(), tcpd_close(), tcpd_readip();
+
+struct	ipread	tcpd = { tcpd_open, tcpd_close, tcpd_readip };
+
+static	FILE	*tfp = NULL;
+static	int	tfd = -1;
+
+
+static	int	tcpd_open(fname)
+char	*fname;
+{
+	if (tfd != -1)
+		return tfd;
+
+	if (!strcmp(fname, "-")) {
+		tfd = 0;
+		tfp = stdin;
+	} else {
+		tfd = open(fname, O_RDONLY);
+		tfp = fdopen(tfd, "r");
+	}
+	return tfd;
+}
+
+
+static	int	tcpd_close()
+{
+	(void) fclose(tfp);
+	return close(tfd);
+}
+
+
+static	int	count_dots(str)
+char	*str;
+{
+	int	i = 0;
+
+	while (*str)
+		if (*str++ == '.')
+			i++;
+	return i;
+}
+
+
+static	int	tcpd_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	struct	tcpiphdr pkt;
+	struct	ip	*ip = (struct ip *)&pkt;
+	struct	protoent *p;
+	char	src[32], dst[32], misc[256], time[32], link1[32], link2[32];
+	char	lbuf[160], *s;
+	int	n, dots, slen, extra = 0;
+
+	if (!fgets(lbuf, sizeof(lbuf) - 1, tfp))
+		return 0;
+
+	if ((s = strchr(lbuf, '\n')))
+		*s = '\0';
+	lbuf[sizeof(lbuf)-1] = '\0';
+
+	bzero(&pkt, sizeof(pkt));
+
+	if ((n = sscanf(lbuf, "%s > %s: %s", src, dst, misc)) != 3)
+		if ((n = sscanf(lbuf, "%s %s > %s: %s",
+				time, src, dst, misc)) != 4)
+			if ((n = sscanf(lbuf, "%s %s: %s > %s: %s",
+					link1, link2, src, dst, misc)) != 5) {
+				n = sscanf(lbuf, "%s %s %s: %s > %s: %s",
+					   time, link1, link2, src, dst, misc);
+				if (n != 6)
+					return -1;
+			}
+
+	if ((dots = count_dots(dst)) == 4) {
+		s = strrchr(src, '.');
+		*s++ = '\0';
+		(void) inet_aton(src, &ip->ip_src);
+		pkt.ti_sport = htons(atoi(s));
+		*--s = '.';
+		s = strrchr(dst, '.');
+	
+		*s++ = '\0';
+		(void) inet_aton(src, &ip->ip_dst);
+		pkt.ti_dport = htons(atoi(s));
+		*--s = '.';
+	
+	} else {
+		(void) inet_aton(src, &ip->ip_src);
+		(void) inet_aton(src, &ip->ip_dst);
+	}
+	ip->ip_len = ip->ip_hl = sizeof(struct ip);
+
+	s = strtok(misc, " :");
+	if ((p = getprotobyname(s))) {
+		ip->ip_p = p->p_proto;
+
+		switch (p->p_proto) {
+		case IPPROTO_TCP :
+		case IPPROTO_UDP :
+			s = strtok(NULL, " :");
+			ip->ip_len += atoi(s);
+			if (p->p_proto == IPPROTO_TCP)
+				extra = sizeof(struct tcphdr);
+			else if (p->p_proto == IPPROTO_UDP)
+				extra = sizeof(struct udphdr);
+			break;
+#ifdef	IGMP
+		case IPPROTO_IGMP :
+			extra = sizeof(struct igmp);
+			break;
+#endif
+		case IPPROTO_ICMP :
+			extra = sizeof(struct icmp);
+			break;
+		default :
+			break;
+		}
+	}
+	slen = ip->ip_hl + extra + ip->ip_len;
+	return slen;
+}
diff --git a/contrib/ipfilter/ipft_tx.c b/contrib/ipfilter/ipft_tx.c
new file mode 100644
index 0000000..0522f96
--- /dev/null
+++ b/contrib/ipfilter/ipft_tx.c
@@ -0,0 +1,338 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include "ip_compat.h"
+#include "ipf.h"
+#include "ipt.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipft_tx.c	1.7 6/5/96 (C) 1993 Darren Reed";
+static	char	rcsid[] = "$Id: ipft_tx.c,v 2.0.1.2 1997/01/19 04:52:25 darrenr Exp $";
+#endif
+
+extern	int	opts;
+extern	u_long	buildopts();
+
+static	char	*tx_proto = "";
+
+static	int	text_open(), text_close(), text_readip(), parseline();
+
+static	char	tcp_flagset[] = "FSRPAU";
+static	u_char	tcp_flags[] = { TH_FIN, TH_SYN, TH_RST, TH_PUSH,
+				TH_ACK, TH_URG };
+
+struct	ipread	iptext = { text_open, text_close, text_readip };
+static	FILE	*tfp = NULL;
+static	int	tfd = -1;
+
+static	u_long	tx_hostnum();
+static	u_short	tx_portnum();
+
+
+/*
+ * returns an ip address as a long var as a result of either a DNS lookup or
+ * straight inet_addr() call
+ */
+static	u_long	tx_hostnum(host, resolved)
+char	*host;
+int	*resolved;
+{
+	struct	hostent	*hp;
+	struct	netent	*np;
+
+	*resolved = 0;
+	if (!strcasecmp("any",host))
+		return 0L;
+	if (isdigit(*host))
+		return inet_addr(host);
+
+	if (!(hp = gethostbyname(host))) {
+		if (!(np = getnetbyname(host))) {
+			*resolved = -1;
+			fprintf(stderr, "can't resolve hostname: %s\n", host);
+			return 0;
+		}
+		return np->n_net;
+	}
+	return *(u_long *)hp->h_addr;
+}
+
+
+/*
+ * find the port number given by the name, either from getservbyname() or
+ * straight atoi()
+ */
+static	u_short	tx_portnum(name)
+char	*name;
+{
+	struct	servent	*sp, *sp2;
+	u_short	p1 = 0;
+
+	if (isdigit(*name))
+		return (u_short)atoi(name);
+	if (!tx_proto)
+		tx_proto = "tcp/udp";
+	if (strcasecmp(tx_proto, "tcp/udp")) {
+		sp = getservbyname(name, tx_proto);
+		if (sp)
+			return ntohs(sp->s_port);
+		(void) fprintf(stderr, "unknown service \"%s\".\n", name);
+		return 0;
+	}
+	sp = getservbyname(name, "tcp");
+	if (sp)
+		p1 = sp->s_port;
+	sp2 = getservbyname(name, "udp");
+	if (!sp || !sp2) {
+		(void) fprintf(stderr, "unknown tcp/udp service \"%s\".\n",
+			name);
+		return 0;
+	}
+	if (p1 != sp2->s_port) {
+		(void) fprintf(stderr, "%s %d/tcp is a different port to ",
+			name, p1);
+		(void) fprintf(stderr, "%s %d/udp\n", name, sp->s_port);
+		return 0;
+	}
+	return ntohs(p1);
+}
+
+
+char	*tx_icmptypes[] = {
+	"echorep", (char *)NULL, (char *)NULL, "unreach", "squench",
+	"redir", (char *)NULL, (char *)NULL, "echo", (char *)NULL,
+	(char *)NULL, "timex", "paramprob", "timest", "timestrep",
+	"inforeq", "inforep", "maskreq", "maskrep", "END"
+};
+
+static	int	text_open(fname)
+char	*fname;
+{
+	if (tfp && tfd != -1) {
+		rewind(tfp);
+		return tfd;
+	}
+
+	if (!strcmp(fname, "-")) {
+		tfd = 0;
+		tfp = stdin;
+	} else {
+		tfd = open(fname, O_RDONLY);
+		if (tfd != -1)
+			tfp = fdopen(tfd, "r");
+	}
+	return tfd;
+}
+
+
+static	int	text_close()
+{
+	int	cfd = tfd;
+
+	tfd = -1;
+	return close(cfd);
+}
+
+
+static	int	text_readip(buf, cnt, ifn, dir)
+char	*buf, **ifn;
+int	cnt, *dir;
+{
+	register char *s;
+	struct	ip *ip;
+	char	line[513];
+
+ 	ip = (struct ip *)buf;
+	*ifn = NULL;
+	while (fgets(line, sizeof(line)-1, tfp)) {
+		if ((s = index(line, '\n')))
+			*s = '\0';
+		if ((s = index(line, '\r')))
+			*s = '\0';
+		if ((s = index(line, '#')))
+			*s = '\0';
+		if (!*line)
+			continue;
+		if (!(opts & OPT_BRIEF))
+			printf("input: %s\n", line);
+		*ifn = NULL;
+		*dir = 0;
+		if (!parseline(line, buf, ifn, dir))
+#if 0
+			return sizeof(struct tcpiphdr);
+#else
+			return sizeof(struct ip);
+#endif
+	}
+	return -1;
+}
+
+static	int	parseline(line, ip, ifn, out)
+char	*line;
+struct	ip	*ip;
+char	**ifn;
+int	*out;
+{
+	tcphdr_t	th, *tcp = &th;
+	struct	icmp	icmp, *ic = &icmp;
+	char	*cps[20], **cpp, c, ipopts[68];
+	int	i, r;
+
+	bzero((char *)ip, MAX(sizeof(*tcp), sizeof(*ic)) + sizeof(*ip));
+	bzero((char *)tcp, sizeof(*tcp));
+	bzero((char *)ic, sizeof(*ic));
+	bzero(ipopts, sizeof(ipopts));
+	ip->ip_hl = sizeof(*ip) >> 2;
+	ip->ip_v = IPVERSION;
+	for (i = 0, cps[0] = strtok(line, " \b\t\r\n"); cps[i] && i < 19; )
+		cps[++i] = strtok(NULL, " \b\t\r\n");
+	if (i < 2)
+		return 1;
+
+	cpp = cps;
+
+	c = **cpp;
+	if (!isalpha(c) || (tolower(c) != 'o' && tolower(c) != 'i')) {
+		fprintf(stderr, "bad direction \"%s\"\n", *cpp);
+		return 1;
+	}
+	*out = (tolower(c) == 'o') ? 1 : 0;
+	cpp++;
+
+	if (!strcasecmp(*cpp, "on")) {
+		cpp++;
+		if (!*cpp)
+			return 1;
+		*ifn = *cpp++;
+	}
+
+	c = **cpp;
+	ip->ip_len = sizeof(struct ip);
+	if (!strcasecmp(*cpp, "tcp") || !strcasecmp(*cpp, "udp") ||
+	    !strcasecmp(*cpp, "icmp")) {
+		if (c == 't') {
+			ip->ip_p = IPPROTO_TCP;
+			ip->ip_len += sizeof(struct tcphdr);
+			tx_proto = "tcp";
+		} else if (c == 'u') {
+			ip->ip_p = IPPROTO_UDP;
+			ip->ip_len += sizeof(struct udphdr);
+			tx_proto = "udp";
+		} else {
+			ip->ip_p = IPPROTO_ICMP;
+			ip->ip_len += sizeof(struct icmp);
+			tx_proto = "icmp";
+		}
+		cpp++;
+	} else
+		ip->ip_p = IPPROTO_IP;
+
+	if (!*cpp)
+		return 1;
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP) {
+		char	*last;
+
+		last = index(*cpp, ',');
+		if (!last) {
+			fprintf(stderr, "tcp/udp with no source port\n");
+			return 1;
+		}
+		*last++ = '\0';
+		tcp->th_sport = htons(tx_portnum(last));
+	}
+	ip->ip_src.s_addr = tx_hostnum(*cpp, &r);
+	cpp++;
+	if (!*cpp)
+		return 1;
+
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP) {
+		char	*last;
+
+		last = index(*cpp, ',');
+		if (!last) {
+			fprintf(stderr, "tcp/udp with no destination port\n");
+			return 1;
+		}
+		*last++ = '\0';
+		tcp->th_dport = htons(tx_portnum(last));
+	}
+	ip->ip_dst.s_addr = tx_hostnum(*cpp, &r);
+	cpp++;
+	if (*cpp && ip->ip_p == IPPROTO_TCP) {
+		extern	char	tcp_flagset[];
+		extern	u_char	tcp_flags[];
+		char	*s, *t;
+
+		for (s = *cpp; *s; s++)
+			if ((t  = index(tcp_flagset, *s)))
+				tcp->th_flags |= tcp_flags[t - tcp_flagset];
+		if (tcp->th_flags)
+			cpp++;
+		assert(tcp->th_flags != 0);
+	} else if (*cpp && ip->ip_p == IPPROTO_ICMP) {
+		extern	char	*tx_icmptypes[];
+		char	**s, *t;
+		int	i;
+
+		for (s = tx_icmptypes, i = 0; !*s || strcmp(*s, "END");
+		     s++, i++)
+			if (*s && !strncasecmp(*cpp, *s, strlen(*s))) {
+				ic->icmp_type = i;
+				if ((t = index(*cpp, ',')))
+					ic->icmp_code = atoi(t+1);
+				cpp++;
+				break;
+			}
+	}
+
+	if (*cpp && !strcasecmp(*cpp, "opt")) {
+		u_long	olen;
+
+		cpp++;
+		olen = buildopts(*cpp, ipopts);
+		if (olen) {
+			bcopy(ipopts, (char *)(ip + 1), olen);
+			ip->ip_hl += olen >> 2;
+		}
+	}
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		bcopy((char *)tcp, ((char *)ip) + (ip->ip_hl << 2),
+			sizeof(*tcp));
+	else if (ip->ip_p == IPPROTO_ICMP)
+		bcopy((char *)ic, ((char *)ip) + (ip->ip_hl << 2),
+			sizeof(*ic));
+	return 0;
+}
diff --git a/contrib/ipfilter/ipl.h b/contrib/ipfilter/ipl.h
new file mode 100644
index 0000000..9a2e43d
--- /dev/null
+++ b/contrib/ipfilter/ipl.h
@@ -0,0 +1,16 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * @(#)ipl.h	1.21 6/5/96
+ */
+
+#ifndef	__IPL_H_
+#define	__IPL_H__
+
+#define	IPL_VERSION	"IP Filter v3.1.7 - 8/2/97"
+
+#endif
diff --git a/contrib/ipfilter/ipl_ldev.c b/contrib/ipfilter/ipl_ldev.c
new file mode 100644
index 0000000..a289325
--- /dev/null
+++ b/contrib/ipfilter/ipl_ldev.c
@@ -0,0 +1,83 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+/*
+ * routines below for saving IP headers to buffer
+ */
+int iplopen(struct inode * inode, struct file * filp)
+{
+	u_int	min = MINOR(inode->i_rdev);
+
+	if (flags & FWRITE)
+		return ENXIO;
+	if (min)
+		return ENXIO;
+	iplbusy++;
+	return 0;
+}
+
+
+int iplclose(struct inode * inode, struct file * filp)
+{
+	u_int	min = MINOR(inode->i_rdev);
+
+	if (min)
+		return ENXIO;
+	iplbusy--;
+	return 0;
+}
+
+
+/*
+ * iplread/ipllog
+ * all three of these must operate with at least splnet() lest they be
+ * called during packet processing and cause an inconsistancy to appear in
+ * the filter lists.
+ */
+int iplread(struct inode *inode, struct file *file, char *buf, int count)
+{
+	register int	ret, s;
+	register size_t	sz, sx;
+	int error;
+
+	if (!uio->uio_resid)
+		return 0;
+	while (!iplused) {
+		error = SLEEP(iplbuf, "ipl sleep");
+		if (error)
+			return error;
+	}
+
+	SPLNET(s);
+
+	ret = sx = sz = MIN(count, iplused);
+	if (iplh < iplt)
+		sz = MIN(sz, LOGSIZE - (iplt - iplbuf));
+	sx -= sz;
+
+	memcpy_tofs(buf, iplt, sz);
+	buf += sz;
+	iplt += sz;
+	iplused -= sz;
+	if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE))
+		iplt = iplbuf;
+
+	if (sx) {
+		memcpy_tofs(buf, iplt, sx);
+		ret += sx;
+		iplt += sx;
+		iplused -= sx;
+		if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE))
+			iplt = iplbuf;
+	}
+	if (!iplused)	/* minimise wrapping around the end */
+		iplh = iplt = iplbuf;
+
+	SPLX(s);
+	return ret;
+}
diff --git a/contrib/ipfilter/ipmon.c b/contrib/ipfilter/ipmon.c
new file mode 100644
index 0000000..2ea34ef
--- /dev/null
+++ b/contrib/ipfilter/ipmon.c
@@ -0,0 +1,582 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <sys/errno.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <sys/uio.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <sys/dir.h>
+#include <sys/mbuf.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/user.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	rcsid[] = "$Id: ipmon.c,v 2.0.1.2 1997/02/04 14:49:19 darrenr Exp $";
+#endif
+
+#include "ip_fil.h"
+
+
+struct	flags {
+	int	value;
+	char	flag;
+};
+
+struct	flags	tcpfl[] = {
+	{ TH_ACK, 'A' },
+	{ TH_RST, 'R' },
+	{ TH_SYN, 'S' },
+	{ TH_FIN, 'F' },
+	{ TH_URG, 'U' },
+	{ TH_PUSH,'P' },
+	{ 0, '\0' }
+};
+
+
+static	char	line[2048];
+static	void	printpacket(), dumphex();
+static	int	opts = 0;
+
+#define	OPT_SYSLOG	0x01
+#define	OPT_RESOLVE	0x02
+#define	OPT_HEXBODY	0x04
+#define	OPT_VERBOSE	0x08
+#define	OPT_HEXHDR	0x10
+
+#ifndef	LOGFAC
+#define	LOGFAC	LOG_LOCAL0
+#endif
+
+void printiplci(icp)
+struct ipl_ci *icp;
+{
+	printf("sec %ld usec %ld hlen %d plen %d\n", icp->sec, icp->usec,
+		icp->hlen, icp->plen);
+}
+
+
+void resynclog(fd, iplcp, log)
+int fd;
+struct ipl_ci *iplcp;
+FILE *log;
+{
+	time_t	now;
+	char	*s = NULL;
+	int	len, nr = 0;
+
+	do {
+		if (s) {
+			s = (char *)&iplcp->sec;
+			if (opts & OPT_SYSLOG) {
+				syslog(LOG_INFO, "Sync bytes:");
+				syslog(LOG_INFO, " %02x %02x %02x %02x",
+					*s, *(s+1), *(s+2), *(s+3));
+				syslog(LOG_INFO, " %02x %02x %02x %02x\n",
+					*(s+4), *(s+5), *(s+6), *(s+7));
+			} else {
+				fprintf(log, "Sync bytes:");
+				fprintf(log, " %02x %02x %02x %02x",
+					*s, *(s+1), *(s+2), *(s+3));
+				fprintf(log, " %02x %02x %02x %02x\n",
+					*(s+4), *(s+5), *(s+6), *(s+7));
+			}
+		}
+		do {
+			s = (char *)&iplcp->sec;
+			len = sizeof(iplcp->sec);
+			while (len) {
+				switch ((nr = read(fd, s, len)))
+				{
+				case -1:
+				case 0:
+					return;
+				default :
+					s += nr;
+					len -= nr;
+					now = time(NULL);
+					break;
+				}
+			}
+		} while ((now < iplcp->sec) ||
+			 ((iplcp->sec - now) > (86400*5)));
+
+		len = sizeof(iplcp->usec);
+		while (len) {
+			switch ((nr = read(fd, s, len)))
+			{
+			case -1:
+			case 0:
+				return;
+			default :
+				s += nr;
+				len -= nr;
+				break;
+			}
+		}
+	} while (iplcp->usec > 1000000);
+
+	len = sizeof(*iplcp) - sizeof(iplcp->sec) - sizeof(iplcp->usec);
+	while (len) {
+		switch ((nr = read(fd, s, len)))
+		{
+		case -1:
+		case 0:
+			return;
+		default :
+			s += nr;
+			len -= nr;
+			break;
+		}
+	}
+}
+
+
+int readlogentry(fd, lenp, buf, bufsize, log)
+int fd, bufsize, *lenp;
+char *buf;
+FILE *log;
+{
+	struct	ipl_ci	*icp = (struct ipl_ci *)buf;
+	time_t	now;
+	char	*s;
+	int	len, n = bufsize, tr = sizeof(struct ipl_ci), nr;
+
+	if (bufsize < tr)
+		return 1;
+	for (s = buf; (n > 0) && (tr > 0); s += nr, n -= nr) {
+		nr = read(fd, s, tr);
+		if (nr > 0)
+			tr -= nr;
+		else
+			return -1;
+	}
+
+	now = time(NULL);
+	if ((icp->hlen > 92) || (now < icp->sec) ||
+	    ((now - icp->sec) > (86400*5))) {
+		if (opts & OPT_SYSLOG)
+			syslog(LOG_INFO, "Out of sync! (1,%x)\n", now);
+		else
+			fprintf(log, "Out of sync! (1,%x)\n", now);
+		dumphex(log, buf, sizeof(struct ipl_ci));
+		resynclog(fd, icp, log);
+	}
+
+
+	len = (int)((u_int)icp->plen);
+	if (len > 128 || len < 0) {
+		if (opts & OPT_SYSLOG)
+			syslog(LOG_INFO, "Out of sync! (2,%d)\n", len);
+		else
+			fprintf(log, "Out of sync! (2,%d)\n", len);
+		dumphex(log, buf, sizeof(struct ipl_ci));
+		resynclog(fd, icp, log);
+	}
+
+
+	tr = icp->hlen + icp->plen;
+	if (n < tr)
+		return 1;
+
+	for (; (n > 0) && (tr > 0); s += nr, n-= nr) {
+		nr = read(fd, s, tr);
+		if (nr > 0)
+			tr -= nr;
+		else
+			return -1;
+	}
+	*lenp = s - buf;
+	return 0;
+}
+
+
+char	*hostname(res, ip)
+int	res;
+struct	in_addr	ip;
+{
+	struct hostent *hp;
+
+	if (!res)
+		return inet_ntoa(ip);
+	hp = gethostbyaddr((char *)&ip, sizeof(ip), AF_INET);
+	if (!hp)
+		return inet_ntoa(ip);
+	return hp->h_name;
+}
+
+
+char	*portname(res, proto, port)
+int	res;
+char	*proto;
+u_short	port;
+{
+	static	char	pname[8];
+	struct	servent	*serv;
+
+	(void) sprintf(pname, "%hu", htons(port));
+	if (!res)
+		return pname;
+	serv = getservbyport((int)port, proto);
+	if (!serv)
+		return pname;
+	return serv->s_name;
+}
+
+
+static	void	dumphex(log, buf, len)
+FILE	*log;
+u_char	*buf;
+int	len;
+{
+	char	line[80];
+	int	i, j, k;
+	u_char	*s = buf, *t = (u_char *)line;
+
+	for (i = len, j = 0; i; i--, j++, s++) {
+		if (j && !(j & 0xf)) {
+			*t++ = '\n';
+			*t = '\0';
+			fputs(line, stdout);
+			t = (u_char *)line;
+			*t = '\0';
+		}
+		sprintf(t, "%02x", *s & 0xff);
+		t += 2;
+		if (!((j + 1) & 0xf)) {
+			s -= 15;
+			sprintf(t, "        ");
+			t += 8;
+			for (k = 16; k; k--, s++)
+				*t++ = (isprint(*s) ? *s : '.');
+			s--;
+		}
+			
+		if ((j + 1) & 0xf)
+			*t++ = ' ';;
+	}
+
+	if (j & 0xf) {
+		for (k = 16 - (j & 0xf); k; k--) {
+			*t++ = ' ';
+			*t++ = ' ';
+			*t++ = ' ';
+		}
+		sprintf(t, "       ");
+		t += 7;
+		s -= j & 0xf;
+		for (k = j & 0xf; k; k--, s++)
+			*t++ = (isprint(*s) ? *s : '.');
+		*t++ = '\n';
+		*t = '\0';
+	}
+	fputs(line, stdout);
+	fflush(stdout);
+}
+
+
+static	void	printpacket(log, buf, blen)
+FILE	*log;
+char	*buf;
+int	blen;
+{
+	struct	protoent *pr;
+	struct	tcphdr	*tp;
+	struct	icmp	*ic;
+	struct	ip	*ipc;
+	struct	tm	*tm;
+	char	c[3], pname[8], *t, *proto;
+	u_short	hl, p;
+	int	i, lvl, res;
+#if !SOLARIS && !(defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
+	int	len;
+#endif
+	struct	ip	*ip;
+	struct	ipl_ci	*lp;
+
+	lp = (struct ipl_ci *)buf;
+	ip = (struct ip *)(buf + sizeof(*lp));
+	res = (opts & OPT_RESOLVE) ? 1 : 0;
+	t = line;
+	*t = '\0';
+	hl = (ip->ip_hl << 2);
+	p = (u_short)ip->ip_p;
+	tm = localtime((time_t *)&lp->sec);
+	if (!(opts & OPT_SYSLOG)) {
+		(void) sprintf(t, "%2d/%02d/%4d ",
+			tm->tm_mday, tm->tm_mon + 1, tm->tm_year + 1900);
+		t += strlen(t);
+	}
+#if SOLARIS || (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199603))
+	(void) sprintf(t, "%02d:%02d:%02d.%-.6ld %.*s @%hd ",
+		tm->tm_hour, tm->tm_min, tm->tm_sec, lp->usec,
+		(int)sizeof(lp->ifname), lp->ifname, lp->rule);
+#else
+	for (len = 0; len < 3; len++)
+		if (!lp->ifname[len])
+			break;
+	if (lp->ifname[len])
+		len++;
+	(void) sprintf(t, "%02d:%02d:%02d.%-.6ld %*.*s%ld @%hd ",
+		tm->tm_hour, tm->tm_min, tm->tm_sec, lp->usec,
+		len, len, lp->ifname, lp->unit, lp->rule);
+#endif
+	pr = getprotobynumber((int)p);
+	if (!pr) {
+		proto = pname;
+		sprintf(proto, "%d", (u_int)p);
+	} else
+		proto = pr->p_name;
+
+ 	if (lp->flags & (FI_SHORT << 20)) {
+		c[0] = 'S';
+		lvl = LOG_ERR;
+	} else if (lp->flags & FR_PASS) {
+		if (lp->flags & FR_LOGP)
+			c[0] = 'p';
+		else
+			c[0] = 'P';
+		lvl = LOG_NOTICE;
+	} else if (lp->flags & FR_BLOCK) {
+		if (lp->flags & FR_LOGB)
+			c[0] = 'b';
+		else
+			c[0] = 'B';
+		lvl = LOG_WARNING;
+	} else if (lp->flags & FF_LOGNOMATCH) {
+		c[0] = 'n';
+		lvl = LOG_NOTICE;
+	} else {
+		c[0] = 'L';
+		lvl = LOG_INFO;
+	}
+	c[1] = ' ';
+	c[2] = '\0';
+	(void) strcat(line, c);
+	t = line + strlen(line);
+
+	if ((p == IPPROTO_TCP || p == IPPROTO_UDP) && !(ip->ip_off & 0x1fff)) {
+		tp = (struct tcphdr *)((char *)ip + hl);
+		if (!(lp->flags & (FI_SHORT << 16))) {
+			(void) sprintf(t, "%s,%s -> ",
+				hostname(res, ip->ip_src),
+				portname(res, proto, tp->th_sport));
+			t += strlen(t);
+			(void) sprintf(t, "%s,%s PR %s len %hu %hu ",
+				hostname(res, ip->ip_dst),
+				portname(res, proto, tp->th_dport),
+				proto, hl, ip->ip_len);
+			t += strlen(t);
+
+			if (p == IPPROTO_TCP) {
+				*t++ = '-';
+				for (i = 0; tcpfl[i].value; i++)
+					if (tp->th_flags & tcpfl[i].value)
+						*t++ = tcpfl[i].flag;
+			}
+			if (opts & OPT_VERBOSE) {
+				(void) sprintf(t, " %lu %lu %hu",
+					(u_long)tp->th_seq,
+					(u_long)tp->th_ack, tp->th_win);
+				t += strlen(t);
+			}
+			*t = '\0';
+		} else {
+			(void) sprintf(t, "%s -> ", hostname(res, ip->ip_src));
+			t += strlen(t);
+			(void) sprintf(t, "%s PR %s len %hu %hu",
+				hostname(res, ip->ip_dst), proto,
+				hl, ip->ip_len);
+		}
+	} else if (p == IPPROTO_ICMP) {
+		ic = (struct icmp *)((char *)ip + hl);
+		(void) sprintf(t, "%s -> ", hostname(res, ip->ip_src));
+		t += strlen(t);
+		(void) sprintf(t, "%s PR icmp len %hu (%hu) icmp %d/%d",
+			hostname(res, ip->ip_dst), hl,
+			ip->ip_len, ic->icmp_type, ic->icmp_code);
+		if (ic->icmp_type == ICMP_UNREACH ||
+		    ic->icmp_type == ICMP_SOURCEQUENCH ||
+		    ic->icmp_type == ICMP_PARAMPROB ||
+		    ic->icmp_type == ICMP_REDIRECT ||
+		    ic->icmp_type == ICMP_TIMXCEED) {
+			ipc = &ic->icmp_ip;
+			tp = (struct tcphdr *)((char *)ipc + hl);
+
+			p = (u_short)ipc->ip_p;
+			pr = getprotobynumber((int)p);
+			if (!pr) {
+				proto = pname;
+				(void) sprintf(proto, "%d", (int)p);
+			} else
+				proto = pr->p_name;
+
+			t += strlen(t);
+			(void) sprintf(t, " for %s,%s -",
+				hostname(res, ipc->ip_src),
+				portname(res, proto, tp->th_sport));
+			t += strlen(t);
+			(void) sprintf(t, " %s,%s PR %s len %hu %hu",
+				hostname(res, ipc->ip_dst),
+				portname(res, proto, tp->th_dport),
+				proto, ipc->ip_hl << 2, ipc->ip_len);
+		}
+	} else {
+		(void) sprintf(t, "%s -> ", hostname(res, ip->ip_src));
+		t += strlen(t);
+		(void) sprintf(t, "%s PR %s len %hu (%hu)",
+			hostname(res, ip->ip_dst), proto, hl, ip->ip_len);
+		t += strlen(t);
+		if (ip->ip_off & 0x1fff)
+			(void) sprintf(t, " frag %s%s%hu@%hu",
+				ip->ip_off & IP_MF ? "+" : "",
+				ip->ip_off & IP_DF ? "-" : "",
+				ip->ip_len - hl, (ip->ip_off & 0x1fff) << 3);
+	}
+	t += strlen(t);
+
+	if (lp->flags & FR_KEEPSTATE) {
+		(void) strcpy(t, " K-S");
+		t += strlen(t);
+	}
+
+	if (lp->flags & FR_KEEPFRAG) {
+		(void) strcpy(t, " K-F");
+		t += strlen(t);
+	}
+
+	*t++ = '\n';
+	*t++ = '\0';
+	if (opts & OPT_SYSLOG)
+		syslog(lvl, "%s", line);
+	else
+		(void) fprintf(log, "%s", line);
+	if (opts & OPT_HEXHDR)
+		dumphex(log, buf, sizeof(struct ipl_ci));
+	if (opts & OPT_HEXBODY)
+		dumphex(log, ip, lp->plen + lp->hlen);
+	fflush(log);
+}
+
+int main(argc, argv)
+int argc;
+char *argv[];
+{
+	FILE	*log = NULL;
+	int	fd = -1, flushed = 0, doread, n;
+	char	buf[512], c, *iplfile = IPL_NAME;
+	extern	int	optind;
+	extern	char	*optarg;
+
+	while ((c = getopt(argc, argv, "Nf:FsvxX")) != -1)
+		switch (c)
+		{
+		case 'f' :
+			iplfile = optarg;
+			break;
+		case 'F' :
+			if ((fd == -1) &&
+			    (fd = open(iplfile, O_RDWR)) == -1) {
+				(void) fprintf(stderr, "%s: ", IPL_NAME);
+				perror("open");
+				exit(-1);
+			}
+			if (ioctl(fd, SIOCIPFFB, &flushed) == 0) {
+				printf("%d bytes flushed from log buffer\n",
+					flushed);
+				fflush(stdout);
+			} else
+				perror("SIOCIPFFB");
+			break;
+		case 'N' :
+			opts |= OPT_RESOLVE;
+			break;
+		case 's' :
+			openlog(argv[0], LOG_NDELAY|LOG_PID, LOGFAC);
+			opts |= OPT_SYSLOG;
+			break;
+		case 'v' :
+			opts |= OPT_VERBOSE;
+			break;
+		case 'x' :
+			opts |= OPT_HEXBODY;
+			break;
+		case 'X' :
+			opts |= OPT_HEXHDR;
+			break;
+		}
+
+	if ((fd == -1) && (fd = open(iplfile, O_RDONLY)) == -1) {
+		(void) fprintf(stderr, "%s: ", IPL_NAME);
+		perror("open");
+		exit(-1);
+	}
+
+	if (!(opts & OPT_SYSLOG)) {
+		log = argv[optind] ? fopen(argv[optind], "a") : stdout;
+		setvbuf(log, NULL, _IONBF, 0);
+	}
+
+	if (flushed) {
+		if (opts & OPT_SYSLOG)
+			syslog(LOG_INFO, "%d bytes flushed from log\n",
+				flushed);
+		else
+			fprintf(log, "%d bytes flushed from log\n", flushed);
+	}
+
+	for (doread = 1; doread; )
+		switch (readlogentry(fd, &n, buf, sizeof(buf), log))
+		{
+		case -1 :
+			if (opts & OPT_SYSLOG)
+				syslog(LOG_ERR, "read: %m\n");
+			else
+				perror("read");
+			doread = 0;
+			break;
+		case 1 :
+			if (opts & OPT_SYSLOG)
+				syslog(LOG_ERR, "aborting logging\n");
+			else
+				fprintf(log, "aborting logging\n");
+			doread = 0;
+			break;
+		case 2 :
+			break;
+		case 0 :
+			printpacket(log, buf, n, opts);
+			break;
+		}
+	exit(0);
+	/* NOTREACHED */
+}
diff --git a/contrib/ipfilter/ipnat.c b/contrib/ipfilter/ipnat.c
new file mode 100644
index 0000000..6458cde
--- /dev/null
+++ b/contrib/ipfilter/ipnat.c
@@ -0,0 +1,692 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ *
+ * Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com)
+ *
+ * Broken still:
+ * Displaying the nat with redirect entries is way confusing
+ *
+ * Example redirection line:
+ * rdr le1 0.0.0.0/0 port 79 -> 199.165.219.129 port 9901
+ * 
+ * Will redirect all incoming packets on le1 to any machine, port 79 to
+ * host 199.165.219.129, port 9901
+ */
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#if defined(sun) && (defined(__svr4__) || defined(__SVR4))
+# include <sys/ioccom.h>
+# include <sys/sysmacros.h>
+#endif
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <net/if.h>
+#include "ip_compat.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+#include "ip_nat.h"
+#include <ctype.h>
+
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static  char    sccsid[] ="@(#)ipnat.c	1.9 6/5/96 (C) 1993 Darren Reed";
+static	char	rcsid[] = "$Id: ipnat.c,v 2.0.1.7 1997/01/30 12:02:32 darrenr Exp $";
+#endif
+
+#if	SOLARIS
+#define	bzero(a,b)	memset(a,0,b)
+#endif
+
+extern	char	*optarg;
+extern	int	kmemcpy();
+
+void	dostats(), printnat(), parsefile(), flushtable();
+
+#define	OPT_REM		1
+#define	OPT_NODO	2
+#define	OPT_STAT	4
+#define	OPT_LIST	8
+#define	OPT_VERBOSE	16
+#define	OPT_FLUSH	32
+#define	OPT_CLEAR	64
+
+
+void usage(name)
+char *name;
+{
+	fprintf(stderr, "%s: [-CFlnrsv] [-f filename]\n", name);
+	exit(1);
+}
+
+
+int main(argc, argv)
+int argc;
+char *argv[];
+{
+	char	*file = NULL, c;
+	int	fd, opts = 1;
+
+	while ((c = getopt(argc, argv, "CFf:lnrsv")) != -1)
+		switch (c)
+		{
+		case 'C' :
+			opts |= OPT_CLEAR;
+			break;
+		case 'f' :
+			file = optarg;
+			break;
+		case 'F' :
+			opts |= OPT_FLUSH;
+			break;
+		case 'l' :
+			opts |= OPT_LIST;
+			break;
+		case 'n' :
+			opts |= OPT_NODO;
+			break;
+		case 'r' :
+			opts &= ~OPT_REM;
+			break;
+		case 's' :
+			opts |= OPT_STAT;
+			break;
+		case 'v' :
+			opts |= OPT_VERBOSE;
+			break;
+		default :
+			usage(argv[0]);
+		}
+
+	if (!(opts & OPT_NODO) && ((fd = open(IPL_NAME, O_RDWR)) == -1) &&
+	    ((fd = open(IPL_NAME, O_RDONLY)) == -1)) {
+		perror("open");
+		exit(-1);
+	}
+
+	if (opts & (OPT_FLUSH|OPT_CLEAR))
+		flushtable(fd, opts);
+	if (file)
+		parsefile(fd, file, opts);
+	if (opts & (OPT_LIST|OPT_STAT))
+		dostats(fd, opts);
+	return 0;
+}
+
+
+/*
+ * count consecutive 1's in bit mask.  If the mask generated by counting
+ * consecutive 1's is different to that passed, return -1, else return #
+ * of bits.
+ */
+int	countbits(ip)
+u_long	ip;
+{
+	u_long	ipn;
+	int	cnt = 0, i, j;
+
+	ip = ipn = ntohl(ip);
+	for (i = 32; i; i--, ipn *= 2)
+		if (ipn & 0x80000000)
+			cnt++;
+		else
+			break;
+	ipn = 0;
+	for (i = 32, j = cnt; i; i--, j--) {
+		ipn *= 2;
+		if (j > 0)
+			ipn++;
+	}
+	if (ipn == ip)
+		return cnt;
+	return -1;
+}
+
+
+void printnat(np, verbose, ptr)
+ipnat_t *np;
+int verbose;
+void *ptr;
+{
+	int	bits;
+
+	if (np->in_redir == NAT_REDIRECT) {
+		printf("rdr %s %s", np->in_ifname, inet_ntoa(np->in_out[0]));
+		bits = countbits(np->in_out[1].s_addr);
+		if (bits != -1)
+			printf("/%d ", bits);
+		else
+			printf("/%s ", inet_ntoa(np->in_out[1]));
+		if (np->in_pmin)
+			printf("port %d ", ntohs(np->in_pmin));
+		printf("-> %s", inet_ntoa(np->in_in[0]));
+		if (np->in_pnext)
+			printf(" port %d", ntohs(np->in_pnext));
+		if (np->in_flags & IPN_TCPUDP)
+			printf(" tcp/udp");
+		else if (np->in_flags & IPN_TCP)
+			printf(" tcp");
+		else if (np->in_flags & IPN_UDP)
+			printf(" udp");
+		printf("\n");
+		if (verbose)
+			printf("\t%x %u %x %u %x %d\n", (u_int)np->in_ifp,
+			       np->in_space, np->in_flags, np->in_pnext, np,
+			       np->in_use);
+	} else {
+		np->in_nextip.s_addr = htonl(np->in_nextip.s_addr);
+		printf("map %s %s/", np->in_ifname, inet_ntoa(np->in_in[0]));
+		bits = countbits(np->in_in[1].s_addr);
+		if (bits != -1)
+			printf("%d ", bits);
+		else
+			printf("%s", inet_ntoa(np->in_in[1]));
+		printf(" -> %s/", inet_ntoa(np->in_out[0]));
+		bits = countbits(ntohl(np->in_out[1].s_addr));
+		if (bits != -1)
+			printf("%d ", bits);
+		else
+			printf("%s", inet_ntoa(np->in_out[1]));
+		if (np->in_pmin || np->in_pmax) {
+			printf(" portmap");
+			if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
+				printf(" tcp/udp");
+			else if (np->in_flags & IPN_TCP)
+				printf(" tcp");
+			else if (np->in_flags & IPN_UDP)
+				printf(" udp");
+			printf(" %d:%d", ntohs(np->in_pmin),
+			       ntohs(np->in_pmax));
+		}
+		printf("\n");
+		if (verbose)
+			printf("\t%x %u %s %d %x\n", (u_int)np->in_ifp,
+			       np->in_space, inet_ntoa(np->in_nextip),
+			       np->in_pnext, np->in_flags);
+	}
+}
+
+
+/*
+ * Get a nat filter type given its kernel address.
+ */
+char *getnattype(ipnat)
+ipnat_t *ipnat;
+{
+	ipnat_t ipnatbuff;
+
+	if (ipnat && kmemcpy(&ipnatbuff, ipnat, sizeof(ipnatbuff)))
+		return "???";
+
+	return (ipnatbuff.in_redir == NAT_MAP) ? "MAP" : "RDR";
+}
+
+
+void dostats(fd, opts)
+int fd, opts;
+{
+	natstat_t ns;
+	ipnat_t	ipn;
+	nat_t	**nt[2], *np, nat;
+	int	i = 0;
+
+	bzero((char *)&ns, sizeof(ns));
+
+	if (!(opts & OPT_NODO) && ioctl(fd, SIOCGNATS, &ns) == -1) {
+		perror("ioctl(SIOCGNATS)");
+		return;
+	}
+
+	if (opts & OPT_STAT) {
+		printf("mapped\tin\t%lu\tout\t%lu\n",
+			ns.ns_mapped[0], ns.ns_mapped[1]);
+		printf("added\t%lu\texpired\t%lu\n",
+			ns.ns_added, ns.ns_expire);
+		printf("inuse\t%lu\n", ns.ns_inuse);
+		if (opts & OPT_VERBOSE)
+			printf("table %#x list %#x\n",
+				(u_int)ns.ns_table, (u_int)ns.ns_list);
+	}
+	if (opts & OPT_LIST) {
+		printf("List of active MAP/Redirect filters:\n");
+		while (ns.ns_list) {
+			if (kmemcpy(&ipn, ns.ns_list, sizeof(ipn))) {
+				perror("kmemcpy");
+				break;
+			}
+			printnat(&ipn, opts & OPT_VERBOSE, (void *)ns.ns_list);
+			ns.ns_list = ipn.in_next;
+		}
+
+		nt[0] = (nat_t **)malloc(sizeof(*nt) * NAT_SIZE);
+		if (kmemcpy(nt[0], ns.ns_table[0], sizeof(**nt) * NAT_SIZE)) {
+			perror("kmemcpy");
+			return;
+		}
+
+		printf("\nList of active sessions:\n");
+
+		for (i = 0; i < NAT_SIZE; i++)
+			for (np = nt[0][i]; np; np = nat.nat_hnext[0]) {
+				if (kmemcpy(&nat, np, sizeof(nat)))
+					break;
+
+				printf("%s %-15s %-5hu <- ->",
+					getnattype(nat.nat_ptr),
+					inet_ntoa(nat.nat_inip),
+					ntohs(nat.nat_inport));
+				printf(" %-15s %-5hu",
+					inet_ntoa(nat.nat_outip),
+					ntohs(nat.nat_outport));
+				printf(" [%s %hu]", inet_ntoa(nat.nat_oip),
+					ntohs(nat.nat_oport));
+				printf(" %d %hu %lx", nat.nat_age,
+					nat.nat_use, nat.nat_sumd);
+#if SOLARIS
+				printf(" %lx", nat.nat_ipsumd);
+#endif
+				putchar('\n');
+			}
+		free(nt[0]);
+	}
+}
+
+
+u_short	portnum(name, proto)
+char	*name, *proto;
+{
+	struct	servent *sp, *sp2;
+	u_short	p1 = 0;
+
+	if (isdigit(*name))
+		return htons((u_short)atoi(name));
+	if (!proto)
+		proto = "tcp/udp";
+	if (strcasecmp(proto, "tcp/udp")) {
+		sp = getservbyname(name, proto);
+		if (sp)
+			return sp->s_port;
+		(void) fprintf(stderr, "unknown service \"%s\".\n", name);
+		return 0;
+	}
+	sp = getservbyname(name, "tcp");
+	if (sp)
+		p1 = sp->s_port;
+	sp2 = getservbyname(name, "udp");
+	if (!sp || !sp2) {
+		(void) fprintf(stderr, "unknown tcp/udp service \"%s\".\n",
+			name);
+		return 0;
+	}
+	if (p1 != sp2->s_port) {
+		(void) fprintf(stderr, "%s %d/tcp is a different port to ",
+			name, p1);
+		(void) fprintf(stderr, "%s %d/udp\n", name, sp->s_port);
+		return 0;
+	}
+	return p1;
+}
+
+
+u_long	hostmask(msk)
+char	*msk;
+{
+	int	bits = -1;
+	u_long	mask;
+
+	if (!isdigit(*msk))
+		return (u_long)-1;
+	if (strchr(msk, '.'))
+		return inet_addr(msk);
+	if (strchr(msk, 'x'))
+		return (u_long)strtol(msk, NULL, 0);
+	/*
+	 * set x most significant bits
+	 */
+	for (mask = 0, bits = atoi(msk); bits; bits--) {
+		mask /= 2;
+		mask |= ntohl(inet_addr("128.0.0.0"));
+	}
+	mask = htonl(mask);
+	return mask;
+}
+
+
+/*
+ * returns an ip address as a long var as a result of either a DNS lookup or
+ * straight inet_addr() call
+ */
+u_long	hostnum(host, resolved)
+char	*host;
+int	*resolved;
+{
+	struct	hostent	*hp;
+	struct	netent	*np;
+
+	*resolved = 0;
+	if (!strcasecmp("any",host))
+		return 0L;
+	if (isdigit(*host))
+		return inet_addr(host);
+
+	if (!(hp = gethostbyname(host))) {
+		if (!(np = getnetbyname(host))) {
+			*resolved = -1;
+			fprintf(stderr, "can't resolve hostname: %s\n", host);
+			return 0;
+		}
+		return np->n_net;
+	}
+	return *(u_long *)hp->h_addr;
+}
+
+
+ipnat_t *parse(line)
+char *line;
+{
+	static ipnat_t ipn;
+	char *s, *t;
+	char *shost, *snetm, *dhost, *proto;
+	char *dnetm = NULL, *dport = NULL, *tport = NULL;
+	int resolved;
+
+	bzero((char *)&ipn, sizeof(ipn));
+	if ((s = strchr(line, '\n')))
+		*s = '\0';
+	if ((s = strchr(line, '#')))
+		*s = '\0';
+	if (!*line)
+		return NULL;
+	if (!(s = strtok(line, " \t")))
+		return NULL;
+	if (!strcasecmp(s, "map"))
+		ipn.in_redir = NAT_MAP;
+	else if (!strcasecmp(s, "rdr"))
+		ipn.in_redir = NAT_REDIRECT;
+	else {
+		(void)fprintf(stderr,
+			      "expected \"map\" or \"rdr\", got \"%s\"\n", s);
+		return NULL;
+	}
+
+	if (!(s = strtok(NULL, " \t"))) {
+		fprintf(stderr, "missing fields (interface)\n");
+		return NULL;
+	}
+	strncpy(ipn.in_ifname, s, sizeof(ipn.in_ifname) - 1);
+	ipn.in_ifname[sizeof(ipn.in_ifname) - 1] = '\0';
+	if (!(s = strtok(NULL, " \t"))) {
+		fprintf(stderr, "missing fields (%s)\n", 
+			ipn.in_redir ? "destination": "source");
+		return NULL;
+	}
+	shost = s;
+
+	if (ipn.in_redir == NAT_REDIRECT) {
+		if (!(s = strtok(NULL, " \t"))) {
+			fprintf(stderr, "missing fields (destination port)\n");
+			return NULL;
+		}
+
+		if (strcasecmp(s, "port")) {
+			fprintf(stderr, "missing fields (port)\n");
+			return NULL;
+		}
+
+		if (!(s = strtok(NULL, " \t"))) {
+			fprintf(stderr, "missing fields (destination port)\n");
+			return NULL;
+		}
+
+		dport = s;
+	}
+
+
+	if (!(s = strtok(NULL, " \t"))) {
+		fprintf(stderr, "missing fields (->)\n");
+		return NULL;
+	}
+	if (!strcmp(s, "->")) {
+		snetm = strrchr(shost, '/');
+		if (!snetm) {
+			fprintf(stderr, "missing fields (%s netmask)\n",
+				ipn.in_redir ? "destination":"source");
+			return NULL;
+		}
+	} else {
+		if (strcasecmp(s, "netmask")) {
+			fprintf(stderr, "missing fields (netmask)\n");
+			return NULL;
+		}
+		if (!(s = strtok(NULL, " \t"))) {
+			fprintf(stderr, "missing fields (%s netmask)\n",
+				ipn.in_redir ? "destination":"source");
+			return NULL;
+		}
+		snetm = s;
+	}
+
+        if (!(s = strtok(NULL, " \t"))) {
+		fprintf(stderr, "missing fields (%s)\n",
+			ipn.in_redir ? "destination":"target");
+		return NULL;
+	}
+        dhost = s;
+
+        if (ipn.in_redir == NAT_MAP) {
+		if (!(s = strtok(NULL, " \t"))) {
+			dnetm = strrchr(dhost, '/');
+			if (!dnetm) {
+				fprintf(stderr,
+					"missing fields (dest netmask)\n");
+				return NULL;
+			}
+		}
+		if (!s || !strcasecmp(s, "portmap")) {
+			dnetm = strrchr(dhost, '/');
+			if (!dnetm) {
+				fprintf(stderr,
+					"missing fields (dest netmask)\n");
+				return NULL;
+			}
+		} else {
+			if (strcasecmp(s, "netmask")) {
+				fprintf(stderr,
+					"missing fields (dest netmask)\n");
+				return NULL;
+			}
+			if (!(s = strtok(NULL, " \t"))) {
+				fprintf(stderr,
+					"missing fields (dest netmask)\n");
+				return NULL;
+			}
+			dnetm = s;
+		}
+		if (*dnetm == '/')
+			*dnetm++ = '\0';
+	} else {
+		/* If it's a in_redir, expect target port */
+		if (!(s = strtok(NULL, " \t"))) {
+			fprintf(stderr, "missing fields (destination port)\n");
+			return NULL;
+		}
+
+		if (strcasecmp(s, "port")) {
+			fprintf(stderr, "missing fields (port)\n");
+			return NULL;
+		}
+	  
+		if (!(s = strtok(NULL, " \t"))) {
+			fprintf(stderr, "missing fields (destination port)\n");
+			return NULL;
+		}
+		tport = s;
+	} 
+	    
+
+	if (*snetm == '/')
+		*snetm++ = '\0';
+
+	if (ipn.in_redir == NAT_MAP) {
+		ipn.in_inip = hostnum(shost, &resolved);
+		if (resolved == -1)
+			return NULL;
+		ipn.in_inmsk = hostmask(snetm);
+		ipn.in_outip = hostnum(dhost, &resolved);
+		if (resolved == -1)
+			return NULL;
+		ipn.in_outmsk = hostmask(dnetm);
+	} else {
+		ipn.in_inip = hostnum(dhost, &resolved); /* Inside is target */
+		if (resolved == -1)
+			return NULL;
+		ipn.in_inmsk = hostmask("255.255.255.255");
+		ipn.in_outip = hostnum(shost, &resolved);
+		if (resolved == -1)
+			return NULL;
+		ipn.in_outmsk = hostmask(snetm);
+		if (!(s = strtok(NULL, " \t"))) {
+			ipn.in_flags = IPN_TCP; /* XXX- TCP only by default */
+			proto = "tcp";
+		} else {
+			if (!strcasecmp(s, "tcp"))
+				ipn.in_flags = IPN_TCP;
+			else if (!strcasecmp(s, "udp"))
+				ipn.in_flags = IPN_UDP;
+			else if (!strcasecmp(s, "tcp/udp"))
+				ipn.in_flags = IPN_TCPUDP;
+			else if (!strcasecmp(s, "tcpudp"))
+				ipn.in_flags = IPN_TCPUDP;
+			else {
+				fprintf(stderr,
+					"expected protocol - got \"%s\"\n", s);
+				return NULL;
+			}
+			proto = s;
+			if ((s = strtok(NULL, " \t"))) {
+				fprintf(stderr,
+					"extra junk at the end of rdr: %s\n",
+					s);
+				return NULL;
+			}
+		}
+		ipn.in_pmin = portnum(dport, proto); /* dest port */
+		ipn.in_pmax = ipn.in_pmin; /* NECESSARY of removing nats */
+		ipn.in_pnext = portnum(tport, proto); /* target port */
+		s = NULL; /* That's all she wrote! */
+	}
+	if (!s)
+		return &ipn;
+	if (strcasecmp(s, "portmap")) {
+		fprintf(stderr, "expected \"portmap\" - got \"%s\"\n", s);
+		return NULL;
+	}
+	if (!(s = strtok(NULL, " \t")))
+		return NULL;
+	if (!strcasecmp(s, "tcp"))
+		ipn.in_flags = IPN_TCP;
+	else if (!strcasecmp(s, "udp"))
+		ipn.in_flags = IPN_UDP;
+	else if (!strcasecmp(s, "tcpudp"))
+		ipn.in_flags = IPN_TCPUDP;
+	else if (!strcasecmp(s, "tcp/udp"))
+		ipn.in_flags = IPN_TCPUDP;
+	else {
+		fprintf(stderr, "expected protocol name - got \"%s\"\n", s);
+		return NULL;
+	}
+	proto = s;
+	if (!(s = strtok(NULL, " \t"))) {
+		fprintf(stderr, "no port range found\n");
+		return NULL;
+	}
+	if (!(t = strchr(s, ':'))) {
+		fprintf(stderr, "no port range in \"%s\"\n", s);
+		return NULL;
+	}
+	*t++ = '\0';
+	ipn.in_pmin = portnum(s, proto);
+	ipn.in_pmax = portnum(t, proto);
+	return &ipn;
+}
+
+
+void parsefile(fd, file, opts)
+int fd;
+char *file;
+int opts;
+{
+	char	line[512], *s;
+	ipnat_t	*np;
+	FILE	*fp;
+	int	linenum = 1;
+
+	if (strcmp(file, "-"))
+		fp = fopen(file, "r");
+	else
+		fp = stdin;
+
+	while (fgets(line, sizeof(line) - 1, fp)) {
+		line[sizeof(line) - 1] = '\0';
+		if ((s = strchr(line, '\n')))
+			*s = '\0';
+		if (!(np = parse(line))) {
+			if (*line)
+				fprintf(stderr, "%d: syntax error in \"%s\"\n",
+					linenum, line);
+		} else if (!(opts & OPT_NODO)) {
+			if ((opts & OPT_VERBOSE) && np)
+				printnat(np, opts &  OPT_VERBOSE, NULL);
+			if (opts & OPT_REM) {
+				if (ioctl(fd, SIOCADNAT, np) == -1)
+					perror("ioctl(SIOCADNAT)");
+			} else if (ioctl(fd, SIOCRMNAT, np) == -1)
+				perror("ioctl(SIOCRMNAT)");
+		}
+		linenum++;
+	}
+	fclose(stdin);
+}
+
+
+void flushtable(fd, opts)
+int fd, opts;
+{
+	int n = 0;
+
+	if (opts & OPT_FLUSH) {
+		n = 0;
+		if (!(opts & OPT_NODO) && ioctl(fd, SIOCFLNAT, &n) == -1)
+			perror("ioctl(SIOCFLNAT)");
+		else
+			printf("%d entries flushed from NAT table\n", n);
+	}
+
+	if (opts & OPT_CLEAR) {
+		n = 0;
+		if (!(opts & OPT_NODO) && ioctl(fd, SIOCCNATL, &n) == -1)
+			perror("ioctl(SIOCCNATL)");
+		else
+			printf("%d entries flushed from NAT list\n", n);
+	}
+}
diff --git a/contrib/ipfilter/ipsd/Makefile b/contrib/ipfilter/ipsd/Makefile
new file mode 100644
index 0000000..eb1986e
--- /dev/null
+++ b/contrib/ipfilter/ipsd/Makefile
@@ -0,0 +1,63 @@
+#
+# (C)opyright 1993-1996 by Darren Reed.
+#
+# This code may be freely distributed as long as it retains this notice
+# and is not changed in any way.  The author accepts no responsibility
+# for the use of this software.  I hate legaleese, don't you ?
+#
+OBJS=ipsd.o
+BINDEST=/usr/local/bin
+SBINDEST=/sbin
+MANDIR=/usr/share/man
+BPF=sbpf.o
+NIT=snit.o
+SUNOS4=
+BSD=
+LINUX=slinux.o
+SUNOS5=dlcommon.o sdlpi.o
+
+CC=gcc
+CFLAGS=-g -I..
+
+all:
+	@echo "Use one of these targets:"
+	@echo "	sunos4-nit (standard SunOS 4.1.x)"
+	@echo "	sunos4-bpf (SunOS4.1.x with BPF in the kernel)"
+	@echo "	bsd-bpf (4.4BSD variant with BPF in the kernel)"
+	@echo "	linux (Linux kernels)"
+	@echo "	sunos5 (Solaris 2.x)"
+
+.c.o:
+	$(CC) $(CFLAGS) -c $< -o $@
+
+ipsdr: ipsdr.o
+	$(CC) ipsdr.o -o $@ $(LIBS)
+
+bpf sunos4-bpf :
+	make ipsd "OBJS=$(OBJS)" "UNIXOBJS=$(BPF) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS)"
+
+nit sunos4 sunos4-nit :
+	make ipsd "OBJS=$(OBJS)" "UNIXOBJS=$(NIT) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS)"
+
+sunos5 :
+	make ipsd "OBJS=$(OBJS)" "UNIXOBJS=$(SUNOS5)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -Dsolaris" "LIBS=-lsocket -lnsl"
+
+bsd-bpf :
+	make ipsd "OBJS=$(OBJS)" "UNIXOBJS=$(BPF) $(BSD)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS)"
+
+linux :
+	make ipsd "OBJS=$(OBJS)" "UNIXOBJS=$(LINUX)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -I /usr/src/linux"
+
+ipsd: $(OBJS) $(UNIXOBJS)
+	$(CC) $(OBJS) $(UNIXOBJS) -o $@ $(LIBS)
+
+../ipft_sn.o ../ipft_pc.o:
+	(cd ..; make $(@:../%=%))
+
+clean:
+	rm -rf *.o core a.out ipsd ipsdr
diff --git a/contrib/ipfilter/ipsd/README b/contrib/ipfilter/ipsd/README
new file mode 100644
index 0000000..6746d01
--- /dev/null
+++ b/contrib/ipfilter/ipsd/README
@@ -0,0 +1,32 @@
+
+IP Scan Detetor.
+----------------
+
+This program is designed to be a passive listener for TCP packets sent to
+the host.  It does not exercise the promiscous mode of interfaces.  For
+routing Unix boxes (and firewalls which route/proxy) this is sufficient to
+detect all packets going to/through them.
+
+Upon compiling, a predefined set of "sensitive" ports are configured into
+the program.  Any TCP packets which are seen sent to these ports are counted
+and the IP# of the sending host recorded, along with the time of the first
+packet to that port for that IP#.
+
+After a given number of "hits", it will write the current table of packets
+out to disk.  This number defaults to 10,000.
+
+To analyze the information written to disk, a sample program called "ipsdr"
+is used (should but doesn't implement a tree algorithm for storing data)
+which  reads all log files it recognises and totals up the number of ports
+each host hit.  By default, all ports have the same weighting (1).  Another
+group of passes is then made over this table using a netmask of 0xfffffffe,
+grouping all results which fall under the same resulting IP#.  This netmask
+is then shrunk back to 0, with a output for each level given.  This is aimed
+at detecting port scans done from different hosts on the same subnet (although
+I've not seen this done, if one was trying to do it obscurely...)
+
+Lastly, being passive means that no action is taken to stop port scans being
+done or discourage them.
+
+Darren
+darrenr@cyber.com.au
diff --git a/contrib/ipfilter/ipsd/ip_compat.h b/contrib/ipfilter/ipsd/ip_compat.h
new file mode 100644
index 0000000..a911fd8
--- /dev/null
+++ b/contrib/ipfilter/ipsd/ip_compat.h
@@ -0,0 +1,201 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ *
+ * @(#)ip_compat.h	1.1 9/14/95
+ */
+
+/*
+ * These #ifdef's are here mainly for linux, but who knows, they may
+ * not be in other places or maybe one day linux will grow up and some
+ * of these will turn up there too.
+ */
+#ifndef	ICMP_UNREACH
+# define	ICMP_UNREACH	ICMP_DEST_UNREACH
+#endif
+#ifndef	ICMP_SOURCEQUENCH
+# define	ICMP_SOURCEQUENCH	ICMP_SOURCE_QUENCH
+#endif
+#ifndef	ICMP_TIMXCEED
+# define	ICMP_TIMXCEED	ICMP_TIME_EXCEEDED
+#endif
+#ifndef	ICMP_PARAMPROB
+# define	ICMP_PARAMPROB	ICMP_PARAMETERPROB
+#endif
+#ifndef	IPVERSION
+# define	IPVERSION	4
+#endif
+#ifndef	IPOPT_MINOFF
+# define	IPOPT_MINOFF	4
+#endif
+#ifndef	IPOPT_COPIED
+# define	IPOPT_COPIED(x)	((x)&0x80)
+#endif
+#ifndef	IPOPT_EOL
+# define	IPOPT_EOL	0
+#endif
+#ifndef	IPOPT_NOP
+# define	IPOPT_NOP	1
+#endif
+#ifndef	IP_MF
+# define	IP_MF	((u_short)0x2000)
+#endif
+#ifndef	ETHERTYPE_IP
+# define	ETHERTYPE_IP	((u_short)0x0800)
+#endif
+#ifndef	TH_FIN
+# define	TH_FIN	0x01
+#endif
+#ifndef	TH_SYN
+# define	TH_SYN	0x02
+#endif
+#ifndef	TH_RST
+# define	TH_RST	0x04
+#endif
+#ifndef	TH_PUSH
+# define	TH_PUSH	0x08
+#endif
+#ifndef	TH_ACK
+# define	TH_ACK	0x10
+#endif
+#ifndef	TH_URG
+# define	TH_URG	0x20
+#endif
+#ifndef	IPOPT_EOL
+# define	IPOPT_EOL	0
+#endif
+#ifndef	IPOPT_NOP
+# define	IPOPT_NOP	1
+#endif
+#ifndef	IPOPT_RR
+# define	IPOPT_RR	7
+#endif
+#ifndef	IPOPT_TS
+# define	IPOPT_TS	68
+#endif
+#ifndef	IPOPT_SECURITY
+# define	IPOPT_SECURITY	130
+#endif
+#ifndef	IPOPT_LSRR
+# define	IPOPT_LSRR	131
+#endif
+#ifndef	IPOPT_SATID
+# define	IPOPT_SATID	136
+#endif
+#ifndef	IPOPT_SSRR
+# define	IPOPT_SSRR	137
+#endif
+#ifndef	IPOPT_SECUR_UNCLASS
+# define	IPOPT_SECUR_UNCLASS	((u_short)0x0000)
+#endif
+#ifndef	IPOPT_SECUR_CONFID
+# define	IPOPT_SECUR_CONFID	((u_short)0xf135)
+#endif
+#ifndef	IPOPT_SECUR_EFTO
+# define	IPOPT_SECUR_EFTO	((u_short)0x789a)
+#endif
+#ifndef	IPOPT_SECUR_MMMM
+# define	IPOPT_SECUR_MMMM	((u_short)0xbc4d)
+#endif
+#ifndef	IPOPT_SECUR_RESTR
+# define	IPOPT_SECUR_RESTR	((u_short)0xaf13)
+#endif
+#ifndef	IPOPT_SECUR_SECRET
+# define	IPOPT_SECUR_SECRET	((u_short)0xd788)
+#endif
+#ifndef IPOPT_SECUR_TOPSECRET
+# define	IPOPT_SECUR_TOPSECRET	((u_short)0x6bc5)
+#endif
+
+#ifdef linux
+# define	icmp	icmphdr
+# define	icmp_type	type
+# define	icmp_code	code
+
+/*
+ * From /usr/include/netinet/ip_var.h
+ * !%@#!$@# linux...
+ */
+struct ipovly {
+	caddr_t	ih_next, ih_prev;	/* for protocol sequence q's */
+	u_char	ih_x1;			/* (unused) */
+	u_char	ih_pr;			/* protocol */
+	short	ih_len;			/* protocol length */
+	struct	in_addr ih_src;		/* source internet address */
+	struct	in_addr ih_dst;		/* destination internet address */
+};
+
+typedef	struct	{
+	__u16	th_sport;
+	__u16	th_dport;
+	__u32	th_seq;
+	__u32	th_ack;
+# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
+    defined(vax)
+	__u8	th_res:4;
+	__u8	th_off:4;
+#else
+	__u8	th_off:4;
+	__u8	th_res:4;
+#endif
+	__u8	th_flags;
+	__u16	th_win;
+	__u16	th_sum;
+	__u16	th_urp;
+} tcphdr_t;
+
+typedef	struct	{
+	__u16	uh_sport;
+	__u16	uh_dport;
+	__s16	uh_ulen;
+	__u16	uh_sum;
+} udphdr_t;
+
+typedef	struct	{
+# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
+    defined(vax)
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# else
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# endif
+	__u8	ip_tos;
+	__u16	ip_len;
+	__u16	ip_id;
+	__u16	ip_off;
+	__u8	ip_ttl;
+	__u8	ip_p;
+	__u16	ip_sum;
+	struct	in_addr	ip_src;
+	struct	in_addr	ip_dst;
+} ip_t;
+
+typedef	struct	{
+	__u8	ether_dhost[6];
+	__u8	ether_shost[6];
+	__u16	ether_type;
+} ether_header_t;
+
+# define	bcopy(a,b,c)	memmove(b,a,c)
+# define	bcmp(a,b,c)	memcmp(a,b,c)
+
+# define	ifnet	device
+
+#else
+
+typedef	struct	udphdr	udphdr_t;
+typedef	struct	tcphdr	tcphdr_t;
+typedef	struct	ip	ip_t;
+typedef	struct	ether_header	ether_header_t;
+
+#endif
+
+#ifdef	solaris
+# define	bcopy(a,b,c)	memmove(b,a,c)
+# define	bcmp(a,b,c)	memcmp(a,b,c)
+# define	bzero(a,b)	memset(a,0,b)
+#endif
diff --git a/contrib/ipfilter/ipsd/ipsd.c b/contrib/ipfilter/ipsd/ipsd.c
new file mode 100644
index 0000000..96364dd
--- /dev/null
+++ b/contrib/ipfilter/ipsd/ipsd.c
@@ -0,0 +1,297 @@
+/*
+ * (C)opyright December 1995 Darren Reed.
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+#include <stdio.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipsd.h"
+
+#ifndef	lint
+static	char	sccsid[] = "@(#)ipsd.c	1.3 12/3/95 (C)1995 Darren Reed";
+#endif
+
+extern	char	*optarg;
+extern	int	optind;
+
+#ifdef	linux
+char	default_device[] = "eth0";
+#else
+# ifdef	sun
+char	default_device[] = "le0";
+# else
+#  ifdef	ultrix
+char	default_device[] = "ln0";
+#  else
+char	default_device[] = "lan0";
+#  endif
+# endif
+#endif
+
+#define	NPORTS	21
+
+u_short	defports[NPORTS] = {
+		  7,   9,  20,  21,  23,  25,  53,  69,  79, 111,
+		123, 161, 162, 512, 513, 514, 515, 520, 540, 6000, 0
+	};
+
+ipsd_t	*iphits[NPORTS];
+int	writes = 0;
+
+
+int	ipcmp(sh1, sh2)
+sdhit_t	*sh1, *sh2;
+{
+	return sh1->sh_ip.s_addr - sh2->sh_ip.s_addr;
+}
+
+
+/*
+ * Check to see if we've already received a packet from this host for this
+ * port.
+ */
+int	findhit(ihp, src, dport)
+ipsd_t	*ihp;
+struct	in_addr	src;
+u_short	dport;
+{
+	int	i, j, k;
+	sdhit_t	*sh;
+
+	sh = NULL;
+
+	if (ihp->sd_sz == 4) {
+		for (i = 0, sh = ihp->sd_hit; i < ihp->sd_cnt; i++, sh++)
+			if (src.s_addr == sh->sh_ip.s_addr)
+				return 1;
+	} else {
+		for (i = ihp->sd_cnt / 2, j = (i / 2) - 1; j >= 0; j--) {
+			k = ihp->sd_hit[i].sh_ip.s_addr - src.s_addr;
+			if (!k)
+				return 1;
+			else if (k < 0)
+				i -= j;
+			else
+				i += j;
+		}
+	}
+	return 0;
+}
+
+
+/*
+ * Search for port number amongst the sorted array of targets we're
+ * interested in.
+ */
+int	detect(ip, tcp)
+ip_t	*ip;
+tcphdr_t	*tcp;
+{
+	ipsd_t	*ihp;
+	sdhit_t	*sh;
+	int	i, j, k;
+
+	for (i = 10, j = 4; j >= 0; j--) {
+		k = tcp->th_dport - defports[i];
+		if (!k) {
+			ihp = iphits[i];
+			if (findhit(ihp, ip->ip_src, tcp->th_dport))
+				return 0;
+			sh = ihp->sd_hit + ihp->sd_cnt;
+			sh->sh_date = time(NULL);
+			sh->sh_ip.s_addr = ip->ip_src.s_addr;
+			if (++ihp->sd_cnt == ihp->sd_sz)
+			{
+				ihp->sd_sz += 8;
+				sh = realloc(sh, ihp->sd_sz * sizeof(*sh));
+				ihp->sd_hit = sh;
+			}
+			qsort(sh, ihp->sd_cnt, sizeof(*sh), ipcmp);
+			return 0;
+		}
+		if (k < 0)
+			i -= j;
+		else
+			i += j;
+	}
+	return -1;
+}
+
+
+/*
+ * Allocate initial storage for hosts
+ */
+setuphits()
+{
+	int	i;
+
+	for (i = 0; i < NPORTS; i++) {
+		if (iphits[i]) {
+			if (iphits[i]->sd_hit)
+				free(iphits[i]->sd_hit);
+			free(iphits[i]);
+		}
+		iphits[i] = (ipsd_t *)malloc(sizeof(ipsd_t));
+		iphits[i]->sd_port = defports[i];
+		iphits[i]->sd_cnt = 0;
+		iphits[i]->sd_sz = 4;
+		iphits[i]->sd_hit = (sdhit_t *)malloc(sizeof(sdhit_t) * 4);
+	}
+}
+
+
+/*
+ * cleanup exits
+ */
+waiter()
+{
+	wait(0);
+}
+
+
+/*
+ * Write statistics out to a file
+ */
+writestats(nwrites)
+int	nwrites;
+{
+	ipsd_t	**ipsd, *ips;
+	char	fname[32];
+	int	i, fd;
+
+	(void) sprintf(fname, "/var/log/ipsd/ipsd-hits.%d", nwrites);
+	fd = open(fname, O_RDWR|O_CREAT|O_TRUNC|O_EXCL, 0644);
+	for (i = 0, ipsd = iphits; i < NPORTS; i++, ipsd++) {
+		ips = *ipsd;
+		if (ips->sd_cnt) {
+			write(fd, ips, sizeof(ipsd_t));
+			write(fd, ips->sd_hit, sizeof(sdhit_t) * ips->sd_sz);
+		}
+	}
+	(void) close(fd);
+	exit(0);
+}
+
+
+void writenow()
+{
+	signal(SIGCHLD, waiter);
+	switch (fork())
+	{
+	case 0 :
+		writestats(writes);
+		exit(0);
+	case -1 :
+		perror("vfork");
+		break;
+	default :
+		writes++;
+		setuphits();
+		break;
+	}
+}
+
+
+void	usage(prog)
+char	*prog;
+{
+	fprintf(stderr, "Usage: %s [-d device]\n", prog);
+	exit(1);
+}
+
+
+void detecthits(fd, writecount)
+int fd, writecount;
+{
+	struct	in_addr	ip;
+	int	hits = 0;
+
+	while (1) {
+		hits += readloop(fd, ip);
+		if (hits > writecount) {
+			writenow();
+			hits = 0;
+		}
+	}
+}
+
+
+main(argc, argv)
+int	argc;
+char	*argv[];
+{
+	char	c, *name =  argv[0], *dev = NULL;
+	int	fd, writeafter = 10000, angelic = 0;
+
+	while ((c = getopt(argc, argv, "ad:n:")) != -1)
+		switch (c)
+		{
+		case 'a' :
+			angelic = 1;
+			break;
+		case 'd' :
+			dev = optarg;
+			break;
+		case 'n' :
+			writeafter = atoi(optarg);
+			break;
+		default :
+			fprintf(stderr, "Unknown option \"%c\"\n", c);
+			usage(name);
+		}
+
+	bzero(iphits, sizeof(iphits));
+	setuphits();
+
+	if (!dev)
+		dev = default_device;
+	printf("Device:  %s\n", dev);
+	fd = initdevice(dev, 60);
+
+	if (!angelic) {
+		switch (fork())
+		{
+		case 0 :
+			(void) close(0);
+			(void) close(1);
+			(void) close(2);
+			(void) setpgrp(0, getpgrp());
+			(void) setsid();
+			break;
+		case -1:
+			perror("fork");
+			exit(-1);
+		default:
+			exit(0);
+		}
+	}
+	signal(SIGUSR1, writenow);
+	detecthits(fd, writeafter);
+}
diff --git a/contrib/ipfilter/ipsd/ipsd.h b/contrib/ipfilter/ipsd/ipsd.h
new file mode 100644
index 0000000..a9f3920
--- /dev/null
+++ b/contrib/ipfilter/ipsd/ipsd.h
@@ -0,0 +1,30 @@
+/*
+ * (C)opyright December 1995 Darren Reed.
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ * @(#)ipsd.h	1.3 12/3/95
+ */
+
+typedef	struct	{
+	time_t	sh_date;
+	struct	in_addr	sh_ip;
+} sdhit_t;
+
+typedef	struct	{
+	u_int	sd_sz;
+	u_int	sd_cnt;
+	u_short	sd_port;
+	sdhit_t	*sd_hit;
+} ipsd_t;
+
+typedef	struct	{
+	struct	in_addr	ss_ip;
+	int	ss_hits;
+	u_long	ss_ports;
+} ipss_t;
+
diff --git a/contrib/ipfilter/ipsd/ipsdr.c b/contrib/ipfilter/ipsd/ipsdr.c
new file mode 100644
index 0000000..b3bf957
--- /dev/null
+++ b/contrib/ipfilter/ipsd/ipsdr.c
@@ -0,0 +1,315 @@
+/*
+ * (C)opyright December 1995 Darren Reed.
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+#include <stdio.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <malloc.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/dir.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipsd.h"
+
+#ifndef	lint
+static	char	sccsid[] = "@(#)ipsdr.c	1.3 12/3/95 (C)1995 Darren Reed";
+#endif
+
+extern	char	*optarg;
+extern	int	optind;
+
+#define	NPORTS	21
+
+u_short	defports[NPORTS] = {
+		7,   9,  20,  21,  23,  25,  53,  69,  79, 111,
+		123, 161, 162, 512, 513, 513, 515, 520, 540, 6000, 0
+	};
+u_short	pweights[NPORTS] = {
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+		1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+	};
+
+ipsd_t	*iphits[NPORTS];
+int	pkts;
+
+
+int	ipcmp(sh1, sh2)
+sdhit_t	*sh1, *sh2;
+{
+	return sh1->sh_ip.s_addr - sh2->sh_ip.s_addr;
+}
+
+
+int	ssipcmp(sh1, sh2)
+ipss_t	*sh1, *sh2;
+{
+	return sh1->ss_ip.s_addr - sh2->ss_ip.s_addr;
+}
+
+
+int countpbits(num)
+u_long	num;
+{
+	int	i, j;
+
+	for (i = 1, j = 0; i; i <<= 1)
+		if (num & i)
+			j++;
+	return j;
+}
+
+
+/*
+ * Check to see if we've already received a packet from this host for this
+ * port.
+ */
+int	findhit(ihp, src, dport)
+ipsd_t	*ihp;
+struct	in_addr	src;
+u_short	dport;
+{
+	int	i, j, k;
+	sdhit_t	*sh;
+
+	sh = NULL;
+
+	if (ihp->sd_sz == 4) {
+		for (i = 0, sh = ihp->sd_hit; i < ihp->sd_cnt; i++, sh++)
+			if (src.s_addr == sh->sh_ip.s_addr)
+				return 1;
+	} else {
+		for (i = ihp->sd_cnt / 2, j = (i / 2) - 1; j >= 0; j--) {
+			k = ihp->sd_hit[i].sh_ip.s_addr - src.s_addr;
+			if (!k)
+				return 1;
+			else if (k < 0)
+				i -= j;
+			else
+				i += j;
+		}
+	}
+	return 0;
+}
+
+
+/*
+ * Search for port number amongst the sorted array of targets we're
+ * interested in.
+ */
+int	detect(srcip, dport, date)
+struct	in_addr	srcip;
+u_short	dport;
+time_t	date;
+{
+	ipsd_t	*ihp;
+	sdhit_t	*sh;
+	int	i, j, k;
+
+	for (i = 10, j = 4; j >= 0; j--) {
+		k = dport - defports[i];
+		if (!k) {
+			ihp = iphits[i];
+			if (findhit(ihp, srcip, dport))
+				return 0;
+			sh = ihp->sd_hit + ihp->sd_cnt;
+			sh->sh_date = date;
+			sh->sh_ip = srcip;
+			if (++ihp->sd_cnt == ihp->sd_sz)
+			{
+				ihp->sd_sz += 8;
+				sh = realloc(sh, ihp->sd_sz * sizeof(*sh));
+				ihp->sd_hit = sh;
+			}
+			qsort(sh, ihp->sd_cnt, sizeof(*sh), ipcmp);
+			return 0;
+		}
+		if (k < 0)
+			i -= j;
+		else
+			i += j;
+	}
+	return -1;
+}
+
+
+/*
+ * Allocate initial storage for hosts
+ */
+setuphits()
+{
+	int	i;
+
+	for (i = 0; i < NPORTS; i++) {
+		if (iphits[i]) {
+			if (iphits[i]->sd_hit)
+				free(iphits[i]->sd_hit);
+			free(iphits[i]);
+		}
+		iphits[i] = (ipsd_t *)malloc(sizeof(ipsd_t));
+		iphits[i]->sd_port = defports[i];
+		iphits[i]->sd_cnt = 0;
+		iphits[i]->sd_sz = 4;
+		iphits[i]->sd_hit = (sdhit_t *)malloc(sizeof(sdhit_t) * 4);
+	}
+}
+
+
+/*
+ * Write statistics out to a file
+ */
+addfile(file)
+char	*file;
+{
+	ipsd_t	ipsd, *ips = &ipsd;
+	sdhit_t	hit, *hp;
+	char	fname[32];
+	int	i, fd, sz;
+
+	if ((fd = open(file, O_RDONLY)) == -1) {
+		perror("open");
+		return;
+	}
+
+	printf("opened %s\n", file);
+	do {
+		if (read(fd, ips, sizeof(*ips)) != sizeof(*ips))
+			break;
+		sz = ips->sd_sz * sizeof(*hp);
+		hp = (sdhit_t *)malloc(sz);
+		if (read(fd, hp, sz) != sz)
+			break;
+		for (i = 0; i < ips->sd_cnt; i++)
+			detect(hp[i].sh_ip, ips->sd_port, hp[i].sh_date);
+	} while (1);
+	(void) close(fd);
+}
+
+
+readfiles(dir)
+char *dir;
+{
+	struct	direct	**d;
+	int	i, j;
+
+	d = NULL;
+	i = scandir(dir, &d, NULL, NULL);
+
+	for (j = 0; j < i; j++) {
+		if (strncmp(d[j]->d_name, "ipsd-hits.", 10))
+			continue;
+		addfile(d[j]->d_name);
+	}
+}
+
+
+void printreport(ss, num)
+ipss_t	*ss;
+int	num;
+{
+	struct	in_addr	ip;
+	ipss_t	*sp;
+	int	i, j, mask;
+	u_long	ports;
+
+	printf("Hosts detected: %d\n", num);
+	if (!num)
+		return;
+	for (i = 0; i < num; i++)
+		printf("%s %d %d\n", inet_ntoa(ss[i].ss_ip), ss[i].ss_hits,
+			countpbits(ss[i].ss_ports));
+
+	printf("--------------------------\n");
+	for (mask = 0xfffffffe, j = 32; j; j--, mask <<= 1) {
+		ip.s_addr = ss[0].ss_ip.s_addr & mask;
+		ports = ss[0].ss_ports;
+		for (i = 1; i < num; i++) {
+			sp = ss + i;
+			if (ip.s_addr != (sp->ss_ip.s_addr & mask)) {
+				printf("Netmask: 0x%08x\n", mask);
+				printf("%s %d\n", inet_ntoa(ip),
+					countpbits(ports));
+				ip.s_addr = sp->ss_ip.s_addr & mask;
+				ports = 0;
+			}
+			ports |= sp->ss_ports;
+		}
+		if (ports) {
+			printf("Netmask: 0x%08x\n", mask);
+			printf("%s %d\n", inet_ntoa(ip), countpbits(ports));
+		}
+	}
+}
+
+
+collectips()
+{
+	ipsd_t	*ips;
+	ipss_t	*ss;
+	int	i, num, nip, in, j, k;
+
+	for (i = 0; i < NPORTS; i++)
+		nip += iphits[i]->sd_cnt;
+
+	ss = (ipss_t *)malloc(sizeof(ipss_t) * nip);
+
+	for (in = 0, i = 0, num = 0; i < NPORTS; i++) {
+		ips = iphits[i];
+		for (j = 0; j < ips->sd_cnt; j++) {
+			for (k = 0; k < num; k++)
+				if (!bcmp(&ss[k].ss_ip, &ips->sd_hit[j].sh_ip,
+					  sizeof(struct in_addr))) {
+					ss[k].ss_hits += pweights[i];
+					ss[k].ss_ports |= (1 << i);
+					break;
+				}
+			if (k == num) {
+				ss[num].ss_ip = ips->sd_hit[j].sh_ip;
+				ss[num].ss_hits = pweights[i];
+				ss[k].ss_ports |= (1 << i);
+				num++;
+			}
+		}
+	}
+
+	qsort(ss, num, sizeof(*ss), ssipcmp);
+
+	printreport(ss, num);
+}
+
+
+main(argc, argv)
+int	argc;
+char	*argv[];
+{
+	char	c, *name =  argv[0], *dir = NULL;
+	int	fd;
+
+	setuphits();
+	dir = dir ? dir : ".";
+	readfiles(dir);
+	collectips();
+}
diff --git a/contrib/ipfilter/ipsd/linux.h b/contrib/ipfilter/ipsd/linux.h
new file mode 100644
index 0000000..7eb382b
--- /dev/null
+++ b/contrib/ipfilter/ipsd/linux.h
@@ -0,0 +1,17 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ *
+ * @(#)linux.h	1.1 8/19/95
+ */
+
+#include <linux/config.h>
+#ifdef MODULE
+#include <linux/module.h>
+#include <linux/version.h>
+#endif /* MODULE */
+
+#include "ip_compat.h"
diff --git a/contrib/ipfilter/ipsd/sbpf.c b/contrib/ipfilter/ipsd/sbpf.c
new file mode 100644
index 0000000..d008a5f
--- /dev/null
+++ b/contrib/ipfilter/ipsd/sbpf.c
@@ -0,0 +1,195 @@
+/*
+ * (C)opyright October 1995 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ */
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mbuf.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#if BSD < 199103
+#include <sys/fcntlcom.h>
+#endif
+#include <sys/dir.h>
+#include <net/bpf.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#include "ip_compat.h"
+
+#ifndef	lint
+static	char	sbpf[] = "@(#)sbpf.c	1.2 12/3/95 (C)1995 Darren Reed";
+#endif
+
+/*
+(000) ldh      [12]
+(001) jeq      #0x800	   jt 2	jf 5
+(002) ldb      [23]
+(003) jeq      #0x6	     jt 4	jf 5
+(004) ret      #68
+(005) ret      #0
+*/
+struct	bpf_insn filter[] = {
+/* 0. */	{ BPF_LD|BPF_H|BPF_ABS,		0, 0, 12 },
+/* 1. */	{ BPF_JMP|BPF_JEQ,		0, 3, 0x0800 },
+/* 2. */	{ BPF_LD|BPF_B|BPF_ABS,		0, 0, 23 },
+/* 3. */	{ BPF_JMP|BPF_JEQ,		0, 1, 0x06 },
+/* 4. */	{ BPF_RET,			0, 0, 68 },
+/* 5. */	{ BPF_RET,			0, 0, 0 }
+};
+/*
+ * the code herein is dervied from libpcap.
+ */
+static	u_char	*buf = NULL;
+static	u_int	bufsize = 32768, timeout = 1;
+
+
+int	ack_recv(ep)
+char	*ep;
+{
+	struct	tcpiphdr	tip;
+	tcphdr_t	*tcp;
+	ip_t	*ip;
+
+	ip = (ip_t *)&tip;
+	tcp = (tcphdr_t *)(ip + 1);
+	bcopy(ep + 14, (char *)ip, sizeof(*ip));
+	bcopy(ep + 14 + (ip->ip_hl << 2), (char *)tcp, sizeof(*tcp));
+	if (ip->ip_p != IPPROTO_TCP && ip->ip_p != IPPROTO_UDP)
+		return -1;
+	if (ip->ip_p & 0x1fff != 0)
+		return 0;
+	if (0 == detect(ip, tcp))
+		return 1;
+	return 0;
+}
+
+
+int	readloop(fd, port, dst)
+int 	fd, port;
+struct	in_addr dst;
+{
+	register u_char	*bp, *cp, *bufend;
+	register struct	bpf_hdr	*bh;
+	register int	cc;
+	time_t	in = time(NULL);
+	int	done = 0;
+
+	while ((cc = read(fd, buf, bufsize)) >= 0) {
+		if (!cc && (time(NULL) - in) > timeout)
+			return done;
+		bp = buf;
+		bufend = buf + cc;
+		/*
+		 * loop through each snapshot in the chunk
+		 */
+		while (bp < bufend) {
+			bh = (struct bpf_hdr *)bp;
+			cp = bp + bh->bh_hdrlen;
+			done += ack_recv(cp);
+			bp += BPF_WORDALIGN(bh->bh_caplen + bh->bh_hdrlen);
+		}
+		return done;
+	}
+	perror("read");
+	exit(-1);
+}
+
+int	initdevice(device, tout)
+char	*device;
+int	tout;
+{
+	struct	bpf_program prog;
+	struct	bpf_version bv;
+	struct	timeval to;
+	struct	ifreq ifr;
+	char	bpfname[16];
+	int	fd, i;
+
+	for (i = 0; i < 16; i++)
+	    {
+		(void) sprintf(bpfname, "/dev/bpf%d", i);
+		if ((fd = open(bpfname, O_RDWR)) >= 0)
+			break;
+	    }
+	if (i == 16)
+	    {
+		fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
+		return -1;
+	    }
+
+	if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
+	    {
+		perror("BIOCVERSION");
+		return -1;
+	    }
+	if (bv.bv_major != BPF_MAJOR_VERSION ||
+	    bv.bv_minor < BPF_MINOR_VERSION)
+	    {
+		fprintf(stderr, "kernel bpf (v%d.%d) filter out of date:\n",
+			bv.bv_major, bv.bv_minor);
+		fprintf(stderr, "current version: %d.%d\n",
+			BPF_MAJOR_VERSION, BPF_MINOR_VERSION);
+		return -1;
+	    }
+
+	(void) strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+	if (ioctl(fd, BIOCSETIF, &ifr) == -1)
+	    {
+		fprintf(stderr, "%s(%d):", ifr.ifr_name, fd);
+		perror("BIOCSETIF");
+		exit(1);
+	    }
+	/*
+	 * set the timeout
+	 */
+	timeout = tout;
+	to.tv_sec = 1;
+	to.tv_usec = 0;
+	if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&to) == -1)
+	    {
+		perror("BIOCSRTIMEOUT");
+		exit(-1);
+	    }
+	/*
+	 * get kernel buffer size
+	 */
+	if (ioctl(fd, BIOCSBLEN, &bufsize) == -1)
+		perror("BIOCSBLEN");
+	if (ioctl(fd, BIOCGBLEN, &bufsize) == -1)
+	    {
+		perror("BIOCGBLEN");
+		exit(-1);
+	    }
+	printf("BPF buffer size: %d\n", bufsize);
+	buf = (u_char*)malloc(bufsize);
+
+	prog.bf_len = sizeof(filter) / sizeof(struct bpf_insn);
+	prog.bf_insns = filter;
+	if (ioctl(fd, BIOCSETF, (caddr_t)&prog) == -1)
+	    {
+		perror("BIOCSETF");
+		exit(-1);
+	    }
+	(void) ioctl(fd, BIOCFLUSH, 0);
+	return fd;
+}
diff --git a/contrib/ipfilter/ipsd/sdlpi.c b/contrib/ipfilter/ipsd/sdlpi.c
new file mode 100644
index 0000000..1d0e41d
--- /dev/null
+++ b/contrib/ipfilter/ipsd/sdlpi.c
@@ -0,0 +1,263 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/stropts.h>
+
+#include <sys/pfmod.h>
+#include <sys/bufmod.h>
+#include <sys/dlpi.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#include "ip_compat.h"
+
+#ifndef	lint
+static	char	snitid[] = "%W% %G% (C)1995 Darren Reed";
+#endif
+
+#define BUFSPACE	32768
+
+static	int	solfd;
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+static	int	timeout;
+
+
+void	nullbell()
+{
+	return 0;
+}
+
+
+int	ack_recv(ep)
+char	*ep;
+{
+	struct	tcpiphdr	tip;
+	tcphdr_t	*tcp;
+	ip_t	*ip;
+
+	ip = (ip_t *)&tip;
+	tcp = (tcphdr_t *)(ip + 1);
+	bcopy(ep, (char *)ip, sizeof(*ip));
+	bcopy(ep + (ip->ip_hl << 2), (char *)tcp, sizeof(*tcp));
+
+	if (ip->ip_off & 0x1fff != 0)
+		return 0;
+	if (0 == detect(ip, tcp))
+		return 1;
+	return 0;
+}
+
+
+int	readloop(fd, port, dst)
+int 	fd, port;
+struct	in_addr dst;
+{
+	static	u_char	buf[BUFSPACE];
+	register u_char	*bp, *cp, *bufend;
+	register struct	sb_hdr	*hp;
+	register int	cc;
+	struct	strbuf	dbuf;
+	ether_header_t	eh;
+	time_t	now = time(NULL);
+	int	flags = 0, i, done = 0;
+
+	fd = solfd;
+	dbuf.len = 0;
+	dbuf.buf = buf;
+	dbuf.maxlen = sizeof(buf);
+	/*
+	 * no control data buffer...
+	 */
+	while (1) {
+		(void) signal(SIGALRM, nullbell);
+		alarm(1);
+		i = getmsg(fd, NULL, &dbuf, &flags);
+		alarm(0);
+		(void) signal(SIGALRM, nullbell);
+
+		cc = dbuf.len;
+		if ((time(NULL) - now) > timeout)
+			return done;
+		if (i == -1)
+			if (errno == EINTR)
+				continue;
+			else
+				break;
+		bp = buf;
+		bufend = buf + cc;
+		/*
+		 * loop through each snapshot in the chunk
+		 */
+		while (bp < bufend) {
+			/*
+			 * get past bufmod header
+			 */
+			hp = (struct sb_hdr *)bp;
+			cp = (u_char *)((char *)bp + sizeof(*hp));
+			bcopy(cp, (char *)&eh, sizeof(eh));
+			/*
+			 * next snapshot
+			 */
+			bp += hp->sbh_totlen;
+			cc -= hp->sbh_totlen;
+
+			if (eh.ether_type != ETHERTYPE_IP)
+				continue;
+
+			cp += sizeof(eh);
+			done += ack_recv(cp);
+		}
+		alarm(1);
+	}
+	perror("getmsg");
+	exit(-1);
+}
+
+int	initdevice(device, tout)
+char	*device;
+int	tout;
+{
+	struct	strioctl si;
+	struct	timeval to;
+	struct	ifreq ifr;
+	struct	packetfilt pfil;
+	u_long	if_flags;
+	u_short	*fwp = pfil.Pf_Filter;
+	char	devname[16], *s, buf[256];
+	int	i, offset, fd, snaplen= 58, chunksize = BUFSPACE;
+
+	(void) sprintf(devname, "/dev/%s", device);
+
+	s = devname + 5;
+	while (*s && !isdigit(*s))
+		s++;
+	if (!*s)
+	    {
+		fprintf(stderr, "bad device name %s\n", devname);
+		exit(-1);
+	    }
+	i = atoi(s);
+	*s = '\0';
+	/*
+	 * For reading
+	 */
+	if ((fd = open(devname, O_RDWR)) < 0)
+	    {
+		fprintf(stderr, "O_RDWR(0) ");
+		perror(devname);
+		exit(-1);
+	    }
+	if (dlattachreq(fd, i) == -1 || dlokack(fd, buf) == -1)
+	    {
+		fprintf(stderr, "DLPI error\n");
+		exit(-1);
+	    }
+	dlbindreq(fd, ETHERTYPE_IP, 0, DL_CLDLS, 0, 0);
+	dlbindack(fd, buf);
+	/*
+	 * read full headers
+	 */
+	if (strioctl(fd, DLIOCRAW, -1, 0, NULL) == -1)
+	    {
+		fprintf(stderr, "DLIOCRAW error\n");
+		exit(-1);
+	    }
+	/*
+	 * Create some filter rules for our TCP watcher. We only want ethernet
+	 * pacets which are IP protocol and only the TCP packets from IP.
+	 */
+	offset = 6;
+	*fwp++ = ENF_PUSHWORD + offset;
+	*fwp++ = ENF_PUSHLIT | ENF_CAND;
+	*fwp++ = htons(ETHERTYPE_IP);
+	*fwp++ = ENF_PUSHWORD + sizeof(struct ether_header)/sizeof(short)+4;
+	*fwp++ = ENF_PUSHLIT | ENF_AND;
+	*fwp++ = htons(0x00ff);
+	*fwp++ = ENF_PUSHLIT | ENF_COR;
+	*fwp++ = htons(IPPROTO_TCP);
+	*fwp++ = ENF_PUSHWORD + sizeof(struct ether_header)/sizeof(short)+4;
+	*fwp++ = ENF_PUSHLIT | ENF_AND;
+	*fwp++ = htons(0x00ff);
+	*fwp++ = ENF_PUSHLIT | ENF_CAND;
+	*fwp++ = htons(IPPROTO_UDP);
+	pfil.Pf_FilterLen = (fwp - &pfil.Pf_Filter[0]);
+	/*
+	 * put filter in place.
+	 */
+
+	if (ioctl(fd, I_PUSH, "pfmod") == -1)
+	    {
+		perror("ioctl: I_PUSH pf");
+		exit(1);
+	    }
+	if (strioctl(fd, PFIOCSETF, -1, sizeof(pfil), (char *)&pfil) == -1)
+	    {
+		perror("ioctl: PFIOCSETF");
+		exit(1);
+	    }
+
+	/*
+	 * arrange to get messages from the NIT STREAM and use NIT_BUF option
+	 */
+	if (ioctl(fd, I_PUSH, "bufmod") == -1)
+	    {
+		perror("ioctl: I_PUSH bufmod");
+		exit(1);
+	    }
+	i = 128;
+	strioctl(fd, SBIOCSSNAP, -1, sizeof(i), (char *)&i);
+	/*
+	 * set the timeout
+	 */
+	to.tv_sec = 1;
+	to.tv_usec = 0;
+	if (strioctl(fd, SBIOCSTIME, -1, sizeof(to), (char *)&to) == -1)
+	    {
+		perror("strioctl(SBIOCSTIME)");
+		exit(-1);
+	    }
+	/*
+	 * flush read queue
+	 */
+	if (ioctl(fd, I_FLUSH, FLUSHR) == -1)
+	    {
+		perror("I_FLUSHR");
+		exit(-1);
+	    }
+	timeout = tout;
+	solfd = fd;
+	return fd;
+}
diff --git a/contrib/ipfilter/ipsd/slinux.c b/contrib/ipfilter/ipsd/slinux.c
new file mode 100644
index 0000000..1115b86
--- /dev/null
+++ b/contrib/ipfilter/ipsd/slinux.c
@@ -0,0 +1,120 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/dir.h>
+#include <linux/netdevice.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include "ip_compat.h"
+#include "tcpip.h"
+
+#ifndef	lint
+static	char	sccsid[] = "@(#)slinux.c	1.1 12/3/95 (C) 1995 Darren Reed";
+#endif
+
+#define BUFSPACE	32768
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+
+static	int	timeout;
+static	char	*eth_dev = NULL;
+
+
+int	ack_recv(bp)
+char	*bp;
+{
+	struct	tcpip	tip;
+	tcphdr_t	*tcp;
+	ip_t	*ip;
+
+	ip = (struct ip *)&tip;
+	tcp = (tcphdr_t *)(ip + 1);
+
+	bcopy(bp, (char *)&tip, sizeof(tip));
+	bcopy(bp + (ip.ip_hl << 2), (char *)tcp, sizeof(*tcp));
+	if (0 == detect(ip, tcp))
+		return 1;
+	return 0;
+}
+
+
+void	readloop(fd, port, dst)
+int 	fd, port;
+struct	in_addr dst;
+{
+	static	u_char	buf[BUFSPACE];
+	struct	sockaddr dest;
+	register u_char	*bp = buf;
+	register int	cc;
+	int	dlen, done = 0;
+	time_t	now = time(NULL);
+
+	do {
+		fflush(stdout);
+		dlen = sizeof(dest);
+		bzero((char *)&dest, dlen);
+		cc = recvfrom(fd, buf, BUFSPACE, 0, &dest, &dlen);
+		if (!cc)
+			if ((time(NULL) - now) > timeout)
+				return done;
+			else
+				continue;
+
+		if (bp[12] != 0x8 || bp[13] != 0)
+			continue;	/* not ip */
+
+		/*
+		 * get rid of non-tcp or fragmented packets here.
+		 */
+		if (cc >= sizeof(struct tcpiphdr))
+		    {
+			if (((bp[14+9] != IPPROTO_TCP) &&
+			     (bp[14+9] != IPPROTO_UDP)) ||
+			    (bp[14+6] & 0x1f) || (bp[14+6] & 0xff))
+				continue;
+			done += ack_recv(bp + 14);
+		    }
+	} while (cc >= 0);
+	perror("read");
+	exit(-1);
+}
+
+int	initdevice(dev, tout)
+char	*dev;
+int	tout;
+{
+	int fd;
+
+	eth_dev = strdup(dev);
+	if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
+	    {
+		perror("socket(SOCK_PACKET)");
+		exit(-1);
+	    }
+
+	return fd;
+}
diff --git a/contrib/ipfilter/ipsd/snit.c b/contrib/ipfilter/ipsd/snit.c
new file mode 100644
index 0000000..4b5fd03
--- /dev/null
+++ b/contrib/ipfilter/ipsd/snit.c
@@ -0,0 +1,230 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <net/nit.h>
+#include <sys/fcntlcom.h>
+#include <sys/dir.h>
+#include <net/nit_if.h>
+#include <net/nit_pf.h>
+#include <net/nit_buf.h>
+#include <net/packetfilt.h>
+#include <sys/stropts.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#ifndef	lint
+static	char	snitid[] = "@(#)snit.c	1.2 12/3/95 (C)1995 Darren Reed";
+#endif
+
+#define BUFSPACE	32768
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+#define BUFHDR_SIZE  (sizeof(struct nit_bufhdr))
+#define NIT_HDRSIZE  (BUFHDR_SIZE)
+
+static	int	timeout;
+
+
+int	ack_recv(ep)
+char	*ep;
+{
+	struct	tcpiphdr	tip;
+	struct	tcphdr	*tcp;
+	struct	ip	*ip;
+
+	ip = (struct ip *)&tip;
+	tcp = (struct tcphdr *)(ip + 1);
+	bcopy(ep + 14, (char *)ip, sizeof(*ip));
+	bcopy(ep + 14 + (ip->ip_hl << 2), (char *)tcp, sizeof(*tcp));
+	if (ip->ip_off & 0x1fff != 0)
+		return 0;
+	if (0 == detect(ip, tcp))
+		return 1;
+	return 0;
+}
+
+
+int	readloop(fd, dst)
+int 	fd;
+struct	in_addr dst;
+{
+	static	u_char	buf[BUFSPACE];
+	register u_char	*bp, *cp, *bufend;
+	register struct	nit_bufhdr	*hp;
+	register int	cc;
+	time_t	now = time(NULL);
+	int	done = 0;
+
+	while ((cc = read(fd, buf, BUFSPACE-1)) >= 0) {
+		if (!cc)
+			if ((time(NULL) - now) > timeout)
+				return done;
+			else
+				continue;
+		bp = buf;
+		bufend = buf + cc;
+		/*
+		 * loop through each snapshot in the chunk
+		 */
+		while (bp < bufend) {
+			cp = (u_char *)((char *)bp + NIT_HDRSIZE);
+			/*
+			 * get past NIT buffer
+			 */
+			hp = (struct nit_bufhdr *)bp;
+			/*
+			 * next snapshot
+			 */
+			bp += hp->nhb_totlen;
+			done += ack_recv(cp);
+		}
+		return done;
+	}
+	perror("read");
+	exit(-1);
+}
+
+int	initdevice(device, tout)
+char	*device;
+int	tout;
+{
+	struct	strioctl si;
+	struct	timeval to;
+	struct	ifreq ifr;
+	struct	packetfilt pfil;
+	u_long	if_flags;
+	u_short	*fwp = pfil.Pf_Filter;
+	int	ret, offset, fd, snaplen= 76, chunksize = BUFSPACE;
+
+	if ((fd = open("/dev/nit", O_RDWR)) < 0)
+	    {
+		perror("/dev/nit");
+		exit(-1);
+	    }
+
+	/*
+	 * Create some filter rules for our TCP watcher. We only want ethernet
+	 * pacets which are IP protocol and only the TCP packets from IP.
+	 */
+	offset = 6;
+	*fwp++ = ENF_PUSHWORD + offset;
+	*fwp++ = ENF_PUSHLIT | ENF_CAND;
+	*fwp++ = htons(ETHERTYPE_IP);
+	*fwp++ = ENF_PUSHWORD + sizeof(struct ether_header)/sizeof(short)+4;
+	*fwp++ = ENF_PUSHLIT | ENF_AND;
+	*fwp++ = htons(0x00ff);
+	*fwp++ = ENF_PUSHLIT | ENF_COR;
+	*fwp++ = htons(IPPROTO_TCP);
+	*fwp++ = ENF_PUSHWORD + sizeof(struct ether_header)/sizeof(short)+4;
+	*fwp++ = ENF_PUSHLIT | ENF_AND;
+	*fwp++ = htons(0x00ff);
+	*fwp++ = ENF_PUSHLIT | ENF_CAND;
+	*fwp++ = htons(IPPROTO_UDP);
+	pfil.Pf_FilterLen = fwp - &pfil.Pf_Filter[0];
+	/*
+	 * put filter in place.
+	 */
+	if (ioctl(fd, I_PUSH, "pf") == -1)
+	    {
+		perror("ioctl: I_PUSH pf");
+		exit(1);
+	    }
+	if (ioctl(fd, NIOCSETF, &pfil) == -1)
+	    {
+		perror("ioctl: NIOCSETF");
+		exit(1);
+	    }
+	/*
+	 * arrange to get messages from the NIT STREAM and use NIT_BUF option
+	 */
+	ioctl(fd, I_SRDOPT, (char*)RMSGD);
+	ioctl(fd, I_PUSH, "nbuf");
+	/*
+	 * set the timeout
+	 */
+	timeout = tout;
+	si.ic_timout = 1;
+	to.tv_sec = 1;
+	to.tv_usec = 0;
+	si.ic_cmd = NIOCSTIME;
+	si.ic_len = sizeof(to);
+	si.ic_dp = (char*)&to;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+	    {
+		perror("ioctl: NIT timeout");
+		exit(-1);
+	    }
+	/*
+	 * set the chunksize
+	 */
+	si.ic_cmd = NIOCSCHUNK;
+	si.ic_len = sizeof(chunksize);
+	si.ic_dp = (char*)&chunksize;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+		perror("ioctl: NIT chunksize");
+	if (ioctl(fd, NIOCGCHUNK, (char*)&chunksize) == -1)
+	    {
+		perror("ioctl: NIT chunksize");
+		exit(-1);
+	    }
+	printf("NIT buffer size: %d\n", chunksize);
+
+	/*
+	 * request the interface
+	 */
+	strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+	ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' ';
+	si.ic_cmd = NIOCBIND;
+	si.ic_len = sizeof(ifr);
+	si.ic_dp = (char*)&ifr;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+	    {
+		perror(ifr.ifr_name);
+		exit(1);
+	    }
+
+	/*
+	 * set the snapshot length
+	 */
+	si.ic_cmd = NIOCSSNAP;
+	si.ic_len = sizeof(snaplen);
+	si.ic_dp = (char*)&snaplen;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+	    {
+		perror("ioctl: NIT snaplen");
+		exit(1);
+	    }
+	(void) ioctl(fd, I_FLUSH, (char*)FLUSHR);
+	return fd;
+}
diff --git a/contrib/ipfilter/ipsend/44arp.c b/contrib/ipfilter/ipsend/44arp.c
new file mode 100644
index 0000000..621d84c
--- /dev/null
+++ b/contrib/ipfilter/ipsend/44arp.c
@@ -0,0 +1,95 @@
+/*
+ * Based upon 4.4BSD's /usr/sbin/arp
+ */
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <errno.h>
+#include <nlist.h>
+#include <stdio.h>
+
+/*
+ * lookup host and return
+ * its IP address in address
+ * (4 bytes)
+ */
+int	resolve(host, address) 
+char	*host, *address;
+{
+        struct	hostent	*hp;
+        u_long	add;
+
+	add = inet_addr(host);
+	if (add == -1)
+	    {
+		if (!(hp = gethostbyname(host)))
+		    {
+			fprintf(stderr, "unknown host: %s\n", host);
+			return -1;
+		    }
+		bcopy((char *)hp->h_addr, (char *)address, 4);
+		return 0;
+	}
+	bcopy((char*)&add, address, 4);
+	return 0;
+}
+
+
+int	arp(addr, eaddr)
+char	*addr, *eaddr;
+{
+	int	mib[6];
+	size_t	needed;
+	char	*malloc(), *lim, *buf, *next;
+	struct	rt_msghdr	*rtm;
+	struct	sockaddr_inarp	*sin;
+	struct	sockaddr_dl	*sdl;
+
+	mib[0] = CTL_NET;
+	mib[1] = PF_ROUTE;
+	mib[2] = 0;
+	mib[3] = AF_INET;
+	mib[4] = NET_RT_FLAGS;
+	mib[5] = RTF_LLINFO;
+	if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1)
+	    {
+		perror("route-sysctl-estimate");
+		exit(-1);
+	    }
+	if ((buf = malloc(needed)) == NULL)
+	    {
+		perror("malloc");
+		exit(-1);
+	    }
+	if (sysctl(mib, 6, buf, &needed, NULL, 0) == -1)
+	    {
+		perror("actual retrieval of routing table");
+		exit(-1);
+	    }
+	lim = buf + needed;
+	for (next = buf; next < lim; next += rtm->rtm_msglen)
+	    {
+		rtm = (struct rt_msghdr *)next;
+		sin = (struct sockaddr_inarp *)(rtm + 1);
+		sdl = (struct sockaddr_dl *)(sin + 1);
+		if (addr && !bcmp(addr, (char *)&sin->sin_addr,
+				  sizeof(struct in_addr)))
+		    {
+			bcopy(LLADDR(sdl), eaddr, sdl->sdl_alen);
+			return 0;
+		    }
+	    }
+	return -1;
+}
diff --git a/contrib/ipfilter/ipsend/Crashable b/contrib/ipfilter/ipsend/Crashable
new file mode 100644
index 0000000..dbe1b87
--- /dev/null
+++ b/contrib/ipfilter/ipsend/Crashable
@@ -0,0 +1,20 @@
+Test 1:
+	Solaris 2.4 - upto and including 101945-34, > 34 ?
+	Solaris 2.5 - 11/95
+	Linux 1.2.13, < 1.3.45(?)
+	3com/sonix bridge
+	Instant Internet
+	KA9Q NOS
+	Netblazer 40i, Version 3.2 OS
+	Irix 6.x
+	HP-UX 9.0
+	HP-UX 10.1
+	LivingstonsComOS
+
+Test 6:
+	SunOS 4.1.x
+	ULtrix 4.3
+
+Test 7:
+	SunOS 4.1.x
+	Linux <= 1.3.84
diff --git a/contrib/ipfilter/ipsend/Makefile b/contrib/ipfilter/ipsend/Makefile
new file mode 100644
index 0000000..1f04912
--- /dev/null
+++ b/contrib/ipfilter/ipsend/Makefile
@@ -0,0 +1,91 @@
+#
+# (C)opyright 1993-1996 by Darren Reed.
+#
+# This code may be freely distributed as long as it retains this notice
+# and is not changed in any way.  The author accepts no responsibility
+# for the use of this software.  I hate legaleese, don't you ?
+#
+OBJS=ipsend.o ip.o ipsopt.o
+ROBJS=ipresend.o ip.o resend.o
+TOBJS=iptest.o iptests.o ip.o
+BPF=sbpf.o
+NIT=snit.o
+SUNOS4=sock.o arp.o
+BSD=sock.o 44arp.o
+LINUX=lsock.o slinux.o larp.o
+LINUXK=
+TOP=..
+SUNOS5=dlcommon.o sdlpi.o arp.o
+
+CC=gcc
+CFLAGS=-g -I.. -DNO_IPF
+
+all:
+	@echo "Use one of these targets:"
+	@echo "	sunos4-nit (standard SunOS 4.1.x)"
+	@echo "	sunos4-bpf (SunOS4.1.x with BPF in the kernel)"
+	@echo "	bsd-bpf (4.4BSD variant with BPF in the kernel)"
+	@echo "	linux10 (Linux 1.0 kernels)"
+	@echo "	linux20 (Linux 2.0 kernels)"
+	@echo "	sunos5 (Solaris 2.x)"
+
+.c.o:
+	$(CC) $(CFLAGS) $(LINUXK) -c $< -o $@
+
+bpf sunos4-bpf :
+	make ipsend "OBJS=$(OBJS)" "UNIXOBJS=$(BPF) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make ipresend "ROBJS=$(ROBJS)" "UNIXOBJS=$(BPF) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make iptest "TOBJS=$(TOBJS)" "UNIXOBJS=$(BPF) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+
+nit sunos4 sunos4-nit :
+	make ipsend "OBJS=$(OBJS)" "UNIXOBJS=$(NIT) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make ipresend "ROBJS=$(ROBJS)" "UNIXOBJS=$(NIT) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make iptest "TOBJS=$(TOBJS)" "UNIXOBJS=$(NIT) $(SUNOS4)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+
+dlpi sunos5 :
+	make ipsend "OBJS=$(OBJS)" "UNIXOBJS=$(SUNOS5)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -Dsolaris" "LIBS=-lsocket -lnsl"
+	make ipresend "ROBJS=$(ROBJS)" "UNIXOBJS=$(SUNOS5)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -Dsolaris" "LIBS=-lsocket -lnsl"
+	make iptest "TOBJS=$(TOBJS)" "UNIXOBJS=$(SUNOS5)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -Dsolaris" "LIBS=-lsocket -lnsl"
+
+bsd-bpf :
+	make ipsend "OBJS=$(OBJS)" "UNIXOBJS=$(BPF) $(BSD)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make ipresend "ROBJS=$(ROBJS)" "UNIXOBJS=$(BPF) $(BSD)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+	make iptest "TOBJS=$(TOBJS)" "UNIXOBJS=$(BPF) $(BSD)" "CC=$(CC)" \
+		"CFLAGS=$(CFLAGS) -DDOSOCKET"
+
+linuxrev :
+	make ipsend "OBJS=$(OBJS)" "UNIXOBJS=$(LINUX)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -I/usr/src/linux/include -DDOSOCKET" $(LINUXK)
+	make ipresend "ROBJS=$(ROBJS)" "UNIXOBJS=$(LINUX)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -I/usr/src/linux/include -DDOSOCKET" $(LINUXK)
+	make iptest "TOBJS=$(TOBJS)" "UNIXOBJS=$(LINUX)" "CC=$(CC)" \
+		CFLAGS="$(CFLAGS) -I/usr/src/linux/include -DDOSOCKET" $(LINUXK)
+
+linux10:
+	make linuxrev 'LINUXK="LINUXK=-DLINUX=0100"'
+
+linux20:
+	make linuxrev 'LINUXK="LINUXK=-DLINUX=0200"'
+
+ipsend: $(OBJS) $(UNIXOBJS)
+	$(CC) $(OBJS) $(UNIXOBJS) -o $@ $(LIBS)
+
+ipresend: $(ROBJS) $(UNIXOBJS)
+	$(CC) $(ROBJS) $(UNIXOBJS) -o $@ $(LIBS)
+
+iptest: $(TOBJS) $(UNIXOBJS)
+	$(CC) $(TOBJS) $(UNIXOBJS) -o $@ $(LIBS)
+
+clean:
+	rm -rf *.o *core a.out ipsend ipresend iptest
diff --git a/contrib/ipfilter/ipsend/arp.c b/contrib/ipfilter/ipsend/arp.c
new file mode 100644
index 0000000..47f6fce
--- /dev/null
+++ b/contrib/ipfilter/ipsend/arp.c
@@ -0,0 +1,119 @@
+/*
+ * arp.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)arp.c	1.4 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <sys/ioctl.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+
+#if defined(__SVR4) || defined(__svr4__)
+#define	bcopy(a,b,c)	memmove(b,a,c)
+#define	bzero(a,c)	memset(a,0,c)
+#define	bcmp(a,b,c)	memcmp(a,b,c)
+#endif
+
+/*
+ * lookup host and return
+ * its IP address in address
+ * (4 bytes)
+ */
+int	resolve(host, address) 
+char	*host, *address;
+{
+        struct	hostent	*hp;
+        u_long	add;
+
+	add = inet_addr(host);
+	if (add == -1)
+	    {
+		if (!(hp = gethostbyname(host)))
+		    {
+			fprintf(stderr, "unknown host: %s\n", host);
+			return -1;
+		    }
+		bcopy((char *)hp->h_addr, (char *)address, 4);
+		return 0;
+	}
+	bcopy((char*)&add, address, 4);
+	return 0;
+}
+
+/*
+ * ARP for the MAC address corresponding
+ * to the IP address.  This taken from
+ * some BSD program, I cant remember which.
+ */
+int	arp(ip, ether)
+char	*ip;
+char	*ether;
+{
+	static	int	sfd = -1;
+	static	char	ethersave[6], ipsave[4];
+	struct	arpreq	ar;
+	struct	sockaddr_in	*sin, san;
+	struct	hostent	*hp;
+	char	*inet_ntoa();
+	int	fd;
+
+	if (!bcmp(ipsave, ip, 4)) {
+		bcopy(ethersave, ether, 6);
+		return 0;
+	}
+	fd = -1;
+	bzero((char *)&ar, sizeof(ar));
+	sin = (struct sockaddr_in *)&ar.arp_pa;
+	sin->sin_family = AF_INET;
+	bcopy(ip, (char *)&sin->sin_addr.s_addr, 4);
+	if ((hp = gethostbyaddr(ip, 4, AF_INET)))
+		if (!(ether_hostton(hp->h_name, ether)))
+			goto savearp;
+
+	if (sfd == -1)
+		if ((sfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
+		    {
+			perror("arp: socket");
+			return -1;
+		    }
+tryagain:
+	if (ioctl(sfd, SIOCGARP, (caddr_t)&ar) == -1)
+	    {
+		if (fd == -1)
+		    {
+			bzero((char *)&san, sizeof(san));
+			san.sin_family = AF_INET;
+			san.sin_port = htons(1);
+			bcopy(ip, &san.sin_addr.s_addr, 4);
+			fd = socket(AF_INET, SOCK_DGRAM, 0);
+			(void) sendto(fd, ip, 4, 0,
+				      (struct sockaddr *)&san, sizeof(san));
+			sleep(1);
+			(void) close(fd);
+			goto tryagain;
+		    }
+		fprintf(stderr, "(%s):", inet_ntoa(sin->sin_addr));
+		if (errno != ENXIO)
+			perror("SIOCGARP");
+		return -1;
+	    }
+
+	bcopy(ar.arp_ha.sa_data, ether, 6);
+savearp:
+	bcopy(ether, ethersave, 6);
+	bcopy(ip, ipsave, 4);
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/dlcommon.c b/contrib/ipfilter/ipsend/dlcommon.c
new file mode 100644
index 0000000..59b283d
--- /dev/null
+++ b/contrib/ipfilter/ipsend/dlcommon.c
@@ -0,0 +1,1359 @@
+/*
+ * Common (shared) DLPI test routines.
+ * Mostly pretty boring boilerplate sorta stuff.
+ * These can be split into individual library routines later
+ * but it's just convenient to keep them in a single file
+ * while they're being developed.
+ *
+ * Not supported:
+ *   Connection Oriented stuff
+ *   QOS stuff
+ */
+
+/*
+typedef	unsigned long	ulong;
+*/
+
+
+#include	<sys/types.h>
+#include	<sys/stream.h>
+#include	<sys/stropts.h>
+#include	<sys/dlpi.h>
+#include	<sys/signal.h>
+#include	<stdio.h>
+#include	<string.h>
+#include	"dltest.h"
+
+#define		CASERET(s)	case s:  return ("s")
+
+char	*dlprim();
+char	*dlstate();
+char	*dlerrno();
+char	*dlpromisclevel();
+char	*dlservicemode();
+char	*dlstyle();
+char	*dlmactype();
+
+
+dlinforeq(fd)
+int	fd;
+{
+	dl_info_req_t	info_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	info_req.dl_primitive = DL_INFO_REQ;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (info_req);
+	ctl.buf = (char *) &info_req;
+
+	flags = RS_HIPRI;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlinforeq:  putmsg");
+}
+
+dlinfoack(fd, bufp)
+int	fd;
+char	*bufp;
+{
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	ctl.maxlen = MAXDLBUF;
+	ctl.len = 0;
+	ctl.buf = bufp;
+
+	strgetmsg(fd, &ctl, (struct strbuf*)NULL, &flags, "dlinfoack");
+
+	dlp = (union DL_primitives *) ctl.buf;
+
+	expecting(DL_INFO_ACK, dlp);
+
+	if (ctl.len < sizeof (dl_info_ack_t))
+		err("dlinfoack:  response ctl.len too short:  %d", ctl.len);
+
+	if (flags != RS_HIPRI)
+		err("dlinfoack:  DL_INFO_ACK was not M_PCPROTO");
+
+	if (ctl.len < sizeof (dl_info_ack_t))
+		err("dlinfoack:  short response ctl.len:  %d", ctl.len);
+}
+
+dlattachreq(fd, ppa)
+int	fd;
+u_long	ppa;
+{
+	dl_attach_req_t	attach_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	attach_req.dl_primitive = DL_ATTACH_REQ;
+	attach_req.dl_ppa = ppa;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (attach_req);
+	ctl.buf = (char *) &attach_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlattachreq:  putmsg");
+}
+
+dlenabmultireq(fd, addr, length)
+int	fd;
+char	*addr;
+int	length;
+{
+	long	buf[MAXDLBUF];
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	dlp = (union DL_primitives*) buf;
+
+	dlp->enabmulti_req.dl_primitive = DL_ENABMULTI_REQ;
+	dlp->enabmulti_req.dl_addr_length = length;
+	dlp->enabmulti_req.dl_addr_offset = sizeof (dl_enabmulti_req_t);
+
+	(void) memcpy((char*)OFFADDR(buf, sizeof (dl_enabmulti_req_t)), addr, length);
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (dl_enabmulti_req_t) + length;
+	ctl.buf = (char*) buf;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlenabmultireq:  putmsg");
+}
+
+dldisabmultireq(fd, addr, length)
+int	fd;
+char	*addr;
+int	length;
+{
+	long	buf[MAXDLBUF];
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	dlp = (union DL_primitives*) buf;
+
+	dlp->disabmulti_req.dl_primitive = DL_ENABMULTI_REQ;
+	dlp->disabmulti_req.dl_addr_length = length;
+	dlp->disabmulti_req.dl_addr_offset = sizeof (dl_disabmulti_req_t);
+
+	(void) memcpy((char*)OFFADDR(buf, sizeof (dl_disabmulti_req_t)), addr, length);
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (dl_disabmulti_req_t) + length;
+	ctl.buf = (char*) buf;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dldisabmultireq:  putmsg");
+}
+
+dlpromisconreq(fd, level)
+int	fd;
+u_long	level;
+{
+	dl_promiscon_req_t	promiscon_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	promiscon_req.dl_primitive = DL_PROMISCON_REQ;
+	promiscon_req.dl_level = level;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (promiscon_req);
+	ctl.buf = (char *) &promiscon_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlpromiscon:  putmsg");
+
+}
+
+dlpromiscoff(fd, level)
+int	fd;
+u_long	level;
+{
+	dl_promiscoff_req_t	promiscoff_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	promiscoff_req.dl_primitive = DL_PROMISCOFF_REQ;
+	promiscoff_req.dl_level = level;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (promiscoff_req);
+	ctl.buf = (char *) &promiscoff_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlpromiscoff:  putmsg");
+}
+
+dlphysaddrreq(fd, addrtype)
+int	fd;
+u_long	addrtype;
+{
+	dl_phys_addr_req_t	phys_addr_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	phys_addr_req.dl_primitive = DL_PHYS_ADDR_REQ;
+	phys_addr_req.dl_addr_type = addrtype;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (phys_addr_req);
+	ctl.buf = (char *) &phys_addr_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlphysaddrreq:  putmsg");
+}
+
+dlsetphysaddrreq(fd, addr, length)
+int	fd;
+char	*addr;
+int	length;
+{
+	long	buf[MAXDLBUF];
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	dlp = (union DL_primitives*) buf;
+
+	dlp->set_physaddr_req.dl_primitive = DL_ENABMULTI_REQ;
+	dlp->set_physaddr_req.dl_addr_length = length;
+	dlp->set_physaddr_req.dl_addr_offset = sizeof (dl_set_phys_addr_req_t);
+
+	(void) memcpy((char*)OFFADDR(buf, sizeof (dl_set_phys_addr_req_t)), addr, length);
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (dl_set_phys_addr_req_t) + length;
+	ctl.buf = (char*) buf;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlsetphysaddrreq:  putmsg");
+}
+
+dldetachreq(fd)
+int	fd;
+{
+	dl_detach_req_t	detach_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	detach_req.dl_primitive = DL_DETACH_REQ;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (detach_req);
+	ctl.buf = (char *) &detach_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dldetachreq:  putmsg");
+}
+
+dlbindreq(fd, sap, max_conind, service_mode, conn_mgmt, xidtest)
+int	fd;
+u_long	sap;
+u_long	max_conind;
+u_long	service_mode;
+u_long	conn_mgmt;
+u_long	xidtest;
+{
+	dl_bind_req_t	bind_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	bind_req.dl_primitive = DL_BIND_REQ;
+	bind_req.dl_sap = sap;
+	bind_req.dl_max_conind = max_conind;
+	bind_req.dl_service_mode = service_mode;
+	bind_req.dl_conn_mgmt = conn_mgmt;
+	bind_req.dl_xidtest_flg = xidtest;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (bind_req);
+	ctl.buf = (char *) &bind_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlbindreq:  putmsg");
+}
+
+dlunitdatareq(fd, addrp, addrlen, minpri, maxpri, datap, datalen)
+int	fd;
+u_char	*addrp;
+int	addrlen;
+u_long	minpri, maxpri;
+u_char	*datap;
+int	datalen;
+{
+	long	buf[MAXDLBUF];
+	union	DL_primitives	*dlp;
+	struct	strbuf	data, ctl;
+
+	dlp = (union DL_primitives*) buf;
+
+	dlp->unitdata_req.dl_primitive = DL_UNITDATA_REQ;
+	dlp->unitdata_req.dl_dest_addr_length = addrlen;
+	dlp->unitdata_req.dl_dest_addr_offset = sizeof (dl_unitdata_req_t);
+	dlp->unitdata_req.dl_priority.dl_min = minpri;
+	dlp->unitdata_req.dl_priority.dl_max = maxpri;
+
+	(void) memcpy(OFFADDR(dlp, sizeof (dl_unitdata_req_t)), addrp, addrlen);
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (dl_unitdata_req_t) + addrlen;
+	ctl.buf = (char *) buf;
+
+	data.maxlen = 0;
+	data.len = datalen;
+	data.buf = (char *) datap;
+
+	if (putmsg(fd, &ctl, &data, 0) < 0)
+		syserr("dlunitdatareq:  putmsg");
+}
+
+dlunbindreq(fd)
+int	fd;
+{
+	dl_unbind_req_t	unbind_req;
+	struct	strbuf	ctl;
+	int	flags;
+
+	unbind_req.dl_primitive = DL_UNBIND_REQ;
+
+	ctl.maxlen = 0;
+	ctl.len = sizeof (unbind_req);
+	ctl.buf = (char *) &unbind_req;
+
+	flags = 0;
+
+	if (putmsg(fd, &ctl, (struct strbuf*) NULL, flags) < 0)
+		syserr("dlunbindreq:  putmsg");
+}
+
+dlokack(fd, bufp)
+int	fd;
+char	*bufp;
+{
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	ctl.maxlen = MAXDLBUF;
+	ctl.len = 0;
+	ctl.buf = bufp;
+
+	strgetmsg(fd, &ctl, (struct strbuf*)NULL, &flags, "dlokack");
+
+	dlp = (union DL_primitives *) ctl.buf;
+
+	expecting(DL_OK_ACK, dlp);
+
+	if (ctl.len < sizeof (dl_ok_ack_t))
+		err("dlokack:  response ctl.len too short:  %d", ctl.len);
+
+	if (flags != RS_HIPRI)
+		err("dlokack:  DL_OK_ACK was not M_PCPROTO");
+
+	if (ctl.len < sizeof (dl_ok_ack_t))
+		err("dlokack:  short response ctl.len:  %d", ctl.len);
+}
+
+dlerrorack(fd, bufp)
+int	fd;
+char	*bufp;
+{
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	ctl.maxlen = MAXDLBUF;
+	ctl.len = 0;
+	ctl.buf = bufp;
+
+	strgetmsg(fd, &ctl, (struct strbuf*)NULL, &flags, "dlerrorack");
+
+	dlp = (union DL_primitives *) ctl.buf;
+
+	expecting(DL_ERROR_ACK, dlp);
+
+	if (ctl.len < sizeof (dl_error_ack_t))
+		err("dlerrorack:  response ctl.len too short:  %d", ctl.len);
+
+	if (flags != RS_HIPRI)
+		err("dlerrorack:  DL_OK_ACK was not M_PCPROTO");
+
+	if (ctl.len < sizeof (dl_error_ack_t))
+		err("dlerrorack:  short response ctl.len:  %d", ctl.len);
+}
+
+dlbindack(fd, bufp)
+int	fd;
+char	*bufp;
+{
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	ctl.maxlen = MAXDLBUF;
+	ctl.len = 0;
+	ctl.buf = bufp;
+
+	strgetmsg(fd, &ctl, (struct strbuf*)NULL, &flags, "dlbindack");
+
+	dlp = (union DL_primitives *) ctl.buf;
+
+	expecting(DL_BIND_ACK, dlp);
+
+	if (flags != RS_HIPRI)
+		err("dlbindack:  DL_OK_ACK was not M_PCPROTO");
+
+	if (ctl.len < sizeof (dl_bind_ack_t))
+		err("dlbindack:  short response ctl.len:  %d", ctl.len);
+}
+
+dlphysaddrack(fd, bufp)
+int	fd;
+char	*bufp;
+{
+	union	DL_primitives	*dlp;
+	struct	strbuf	ctl;
+	int	flags;
+
+	ctl.maxlen = MAXDLBUF;
+	ctl.len = 0;
+	ctl.buf = bufp;
+
+	strgetmsg(fd, &ctl, (struct strbuf*)NULL, &flags, "dlphysaddrack");
+
+	dlp = (union DL_primitives *) ctl.buf;
+
+	expecting(DL_PHYS_ADDR_ACK, dlp);
+
+	if (flags != RS_HIPRI)
+		err("dlbindack:  DL_OK_ACK was not M_PCPROTO");
+
+	if (ctl.len < sizeof (dl_phys_addr_ack_t))
+		err("dlphysaddrack:  short response ctl.len:  %d", ctl.len);
+}
+
+void
+sigalrm()
+{
+	(void) err("sigalrm:  TIMEOUT");
+}
+
+strgetmsg(fd, ctlp, datap, flagsp, caller)
+int	fd;
+struct	strbuf	*ctlp, *datap;
+int	*flagsp;
+char	*caller;
+{
+	int	rc;
+	static	char	errmsg[80];
+
+	/*
+	 * Start timer.
+	 */
+	(void) signal(SIGALRM, sigalrm);
+	if (alarm(MAXWAIT) < 0) {
+		(void) sprintf(errmsg, "%s:  alarm", caller);
+		syserr(errmsg);
+	}
+
+	/*
+	 * Set flags argument and issue getmsg().
+	 */
+	*flagsp = 0;
+	if ((rc = getmsg(fd, ctlp, datap, flagsp)) < 0) {
+		(void) sprintf(errmsg, "%s:  getmsg", caller);
+		syserr(errmsg);
+	}
+
+	/*
+	 * Stop timer.
+	 */
+	if (alarm(0) < 0) {
+		(void) sprintf(errmsg, "%s:  alarm", caller);
+		syserr(errmsg);
+	}
+
+	/*
+	 * Check for MOREDATA and/or MORECTL.
+	 */
+	if ((rc & (MORECTL | MOREDATA)) == (MORECTL | MOREDATA))
+		err("%s:  MORECTL|MOREDATA", caller);
+	if (rc & MORECTL)
+		err("%s:  MORECTL", caller);
+	if (rc & MOREDATA)
+		err("%s:  MOREDATA", caller);
+
+	/*
+	 * Check for at least sizeof (long) control data portion.
+	 */
+	if (ctlp->len < sizeof (long))
+		err("getmsg:  control portion length < sizeof (long):  %d", ctlp->len);
+}
+
+expecting(prim, dlp)
+int	prim;
+union	DL_primitives	*dlp;
+{
+	if (dlp->dl_primitive != (u_long)prim) {
+		printdlprim(dlp);
+		err("expected %s got %s", dlprim(prim),
+			dlprim(dlp->dl_primitive));
+		exit(1);
+	}
+}
+
+/*
+ * Print any DLPI msg in human readable format.
+ */
+printdlprim(dlp)
+union	DL_primitives	*dlp;
+{
+	switch (dlp->dl_primitive) {
+		case DL_INFO_REQ:
+			printdlinforeq(dlp);
+			break;
+
+		case DL_INFO_ACK:
+			printdlinfoack(dlp);
+			break;
+
+		case DL_ATTACH_REQ:
+			printdlattachreq(dlp);
+			break;
+
+		case DL_OK_ACK:
+			printdlokack(dlp);
+			break;
+
+		case DL_ERROR_ACK:
+			printdlerrorack(dlp);
+			break;
+
+		case DL_DETACH_REQ:
+			printdldetachreq(dlp);
+			break;
+
+		case DL_BIND_REQ:
+			printdlbindreq(dlp);
+			break;
+
+		case DL_BIND_ACK:
+			printdlbindack(dlp);
+			break;
+
+		case DL_UNBIND_REQ:
+			printdlunbindreq(dlp);
+			break;
+
+		case DL_SUBS_BIND_REQ:
+			printdlsubsbindreq(dlp);
+			break;
+
+		case DL_SUBS_BIND_ACK:
+			printdlsubsbindack(dlp);
+			break;
+
+		case DL_SUBS_UNBIND_REQ:
+			printdlsubsunbindreq(dlp);
+			break;
+
+		case DL_ENABMULTI_REQ:
+			printdlenabmultireq(dlp);
+			break;
+
+		case DL_DISABMULTI_REQ:
+			printdldisabmultireq(dlp);
+			break;
+
+		case DL_PROMISCON_REQ:
+			printdlpromisconreq(dlp);
+			break;
+
+		case DL_PROMISCOFF_REQ:
+			printdlpromiscoffreq(dlp);
+			break;
+
+		case DL_UNITDATA_REQ:
+			printdlunitdatareq(dlp);
+			break;
+
+		case DL_UNITDATA_IND:
+			printdlunitdataind(dlp);
+			break;
+
+		case DL_UDERROR_IND:
+			printdluderrorind(dlp);
+			break;
+
+		case DL_UDQOS_REQ:
+			printdludqosreq(dlp);
+			break;
+
+		case DL_PHYS_ADDR_REQ:
+			printdlphysaddrreq(dlp);
+			break;
+
+		case DL_PHYS_ADDR_ACK:
+			printdlphysaddrack(dlp);
+			break;
+
+		case DL_SET_PHYS_ADDR_REQ:
+			printdlsetphysaddrreq(dlp);
+			break;
+
+		default:
+			err("printdlprim:  unknown primitive type 0x%x",
+				dlp->dl_primitive);
+			break;
+	}
+}
+
+/* ARGSUSED */
+printdlinforeq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_INFO_REQ\n");
+}
+
+printdlinfoack(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+	u_char	brdcst[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->info_ack.dl_addr_offset),
+		dlp->info_ack.dl_addr_length, addr);
+	addrtostring(OFFADDR(dlp, dlp->info_ack.dl_brdcst_addr_offset),
+		dlp->info_ack.dl_brdcst_addr_length, brdcst);
+
+	(void) printf("DL_INFO_ACK:  max_sdu %d min_sdu %d\n",
+		dlp->info_ack.dl_max_sdu,
+		dlp->info_ack.dl_min_sdu);
+	(void) printf("addr_length %d mac_type %s current_state %s\n",
+		dlp->info_ack.dl_addr_length,
+		dlmactype(dlp->info_ack.dl_mac_type),
+		dlstate(dlp->info_ack.dl_current_state));
+	(void) printf("sap_length %d service_mode %s qos_length %d\n",
+		dlp->info_ack.dl_sap_length,
+		dlservicemode(dlp->info_ack.dl_service_mode),
+		dlp->info_ack.dl_qos_length);
+	(void) printf("qos_offset %d qos_range_length %d qos_range_offset %d\n",
+		dlp->info_ack.dl_qos_offset,
+		dlp->info_ack.dl_qos_range_length,
+		dlp->info_ack.dl_qos_range_offset);
+	(void) printf("provider_style %s addr_offset %d version %d\n",
+		dlstyle(dlp->info_ack.dl_provider_style),
+		dlp->info_ack.dl_addr_offset,
+		dlp->info_ack.dl_version);
+	(void) printf("brdcst_addr_length %d brdcst_addr_offset %d\n",
+		dlp->info_ack.dl_brdcst_addr_length,
+		dlp->info_ack.dl_brdcst_addr_offset);
+	(void) printf("addr %s\n", addr);
+	(void) printf("brdcst_addr %s\n", brdcst);
+}
+
+printdlattachreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_ATTACH_REQ:  ppa %d\n",
+		dlp->attach_req.dl_ppa);
+}
+
+printdlokack(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_OK_ACK:  correct_primitive %s\n",
+		dlprim(dlp->ok_ack.dl_correct_primitive));
+}
+
+printdlerrorack(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_ERROR_ACK:  error_primitive %s errno %s unix_errno %d\n",
+		dlprim(dlp->error_ack.dl_error_primitive),
+		dlerrno(dlp->error_ack.dl_errno),
+		dlp->error_ack.dl_unix_errno);
+}
+
+printdlenabmultireq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->enabmulti_req.dl_addr_offset),
+		dlp->enabmulti_req.dl_addr_length, addr);
+
+	(void) printf("DL_ENABMULTI_REQ:  addr_length %d addr_offset %d\n",
+		dlp->enabmulti_req.dl_addr_length,
+		dlp->enabmulti_req.dl_addr_offset);
+	(void) printf("addr %s\n", addr);
+}
+
+printdldisabmultireq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->disabmulti_req.dl_addr_offset),
+		dlp->disabmulti_req.dl_addr_length, addr);
+
+	(void) printf("DL_DISABMULTI_REQ:  addr_length %d addr_offset %d\n",
+		dlp->disabmulti_req.dl_addr_length,
+		dlp->disabmulti_req.dl_addr_offset);
+	(void) printf("addr %s\n", addr);
+}
+
+printdlpromisconreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_PROMISCON_REQ:  level %s\n",
+		dlpromisclevel(dlp->promiscon_req.dl_level));
+}
+
+printdlpromiscoffreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_PROMISCOFF_REQ:  level %s\n",
+		dlpromisclevel(dlp->promiscoff_req.dl_level));
+}
+
+printdlphysaddrreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_PHYS_ADDR_REQ:  addr_type 0x%x\n",
+		dlp->physaddr_req.dl_addr_type);
+}
+
+printdlphysaddrack(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->physaddr_ack.dl_addr_offset),
+		dlp->physaddr_ack.dl_addr_length, addr);
+
+	(void) printf("DL_PHYS_ADDR_ACK:  addr_length %d addr_offset %d\n",
+		dlp->physaddr_ack.dl_addr_length,
+		dlp->physaddr_ack.dl_addr_offset);
+	(void) printf("addr %s\n", addr);
+}
+
+printdlsetphysaddrreq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->set_physaddr_req.dl_addr_offset),
+		dlp->set_physaddr_req.dl_addr_length, addr);
+
+	(void) printf("DL_SET_PHYS_ADDR_REQ:  addr_length %d addr_offset %d\n",
+		dlp->set_physaddr_req.dl_addr_length,
+		dlp->set_physaddr_req.dl_addr_offset);
+	(void) printf("addr %s\n", addr);
+}
+
+/* ARGSUSED */
+printdldetachreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_DETACH_REQ\n");
+}
+
+printdlbindreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_BIND_REQ:  sap %d max_conind %d\n",
+		dlp->bind_req.dl_sap,
+		dlp->bind_req.dl_max_conind);
+	(void) printf("service_mode %s conn_mgmt %d xidtest_flg 0x%x\n",
+		dlservicemode(dlp->bind_req.dl_service_mode),
+		dlp->bind_req.dl_conn_mgmt,
+		dlp->bind_req.dl_xidtest_flg);
+}
+
+printdlbindack(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->bind_ack.dl_addr_offset),
+		dlp->bind_ack.dl_addr_length, addr);
+
+	(void) printf("DL_BIND_ACK:  sap %d addr_length %d addr_offset %d\n",
+		dlp->bind_ack.dl_sap,
+		dlp->bind_ack.dl_addr_length,
+		dlp->bind_ack.dl_addr_offset);
+	(void) printf("max_conind %d xidtest_flg 0x%x\n",
+		dlp->bind_ack.dl_max_conind,
+		dlp->bind_ack.dl_xidtest_flg);
+	(void) printf("addr %s\n", addr);
+}
+
+/* ARGSUSED */
+printdlunbindreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_UNBIND_REQ\n");
+}
+
+printdlsubsbindreq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	sap[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->subs_bind_req.dl_subs_sap_offset),
+		dlp->subs_bind_req.dl_subs_sap_length, sap);
+
+	(void) printf("DL_SUBS_BIND_REQ:  subs_sap_offset %d sub_sap_len %d\n",
+		dlp->subs_bind_req.dl_subs_sap_offset,
+		dlp->subs_bind_req.dl_subs_sap_length);
+	(void) printf("sap %s\n", sap);
+}
+
+printdlsubsbindack(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	sap[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->subs_bind_ack.dl_subs_sap_offset),
+		dlp->subs_bind_ack.dl_subs_sap_length, sap);
+
+	(void) printf("DL_SUBS_BIND_ACK:  subs_sap_offset %d sub_sap_length %d\n",
+		dlp->subs_bind_ack.dl_subs_sap_offset,
+		dlp->subs_bind_ack.dl_subs_sap_length);
+	(void) printf("sap %s\n", sap);
+}
+
+printdlsubsunbindreq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	sap[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->subs_unbind_req.dl_subs_sap_offset),
+		dlp->subs_unbind_req.dl_subs_sap_length, sap);
+
+	(void) printf("DL_SUBS_UNBIND_REQ:  subs_sap_offset %d sub_sap_length %d\n",
+		dlp->subs_unbind_req.dl_subs_sap_offset,
+		dlp->subs_unbind_req.dl_subs_sap_length);
+	(void) printf("sap %s\n", sap);
+}
+
+printdlunitdatareq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->unitdata_req.dl_dest_addr_offset),
+		dlp->unitdata_req.dl_dest_addr_length, addr);
+
+	(void) printf("DL_UNITDATA_REQ:  dest_addr_length %d dest_addr_offset %d\n",
+		dlp->unitdata_req.dl_dest_addr_length,
+		dlp->unitdata_req.dl_dest_addr_offset);
+	(void) printf("dl_priority.min %d dl_priority.max %d\n",
+		dlp->unitdata_req.dl_priority.dl_min,
+		dlp->unitdata_req.dl_priority.dl_max);
+	(void) printf("addr %s\n", addr);
+}
+
+printdlunitdataind(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+	u_char	src[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->unitdata_ind.dl_dest_addr_offset),
+		dlp->unitdata_ind.dl_dest_addr_length, dest);
+	addrtostring(OFFADDR(dlp, dlp->unitdata_ind.dl_src_addr_offset),
+		dlp->unitdata_ind.dl_src_addr_length, src);
+
+	(void) printf("DL_UNITDATA_IND:  dest_addr_length %d dest_addr_offset %d\n",
+		dlp->unitdata_ind.dl_dest_addr_length,
+		dlp->unitdata_ind.dl_dest_addr_offset);
+	(void) printf("src_addr_length %d src_addr_offset %d\n",
+		dlp->unitdata_ind.dl_src_addr_length,
+		dlp->unitdata_ind.dl_src_addr_offset);
+	(void) printf("group_address 0x%x\n",
+		dlp->unitdata_ind.dl_group_address);
+	(void) printf("dest %s\n", dest);
+	(void) printf("src %s\n", src);
+}
+
+printdluderrorind(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->uderror_ind.dl_dest_addr_offset),
+		dlp->uderror_ind.dl_dest_addr_length, addr);
+
+	(void) printf("DL_UDERROR_IND:  dest_addr_length %d dest_addr_offset %d\n",
+		dlp->uderror_ind.dl_dest_addr_length,
+		dlp->uderror_ind.dl_dest_addr_offset);
+	(void) printf("unix_errno %d errno %s\n",
+		dlp->uderror_ind.dl_unix_errno,
+		dlerrno(dlp->uderror_ind.dl_errno));
+	(void) printf("addr %s\n", addr);
+}
+
+printdltestreq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	addr[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->test_req.dl_dest_addr_offset),
+		dlp->test_req.dl_dest_addr_length, addr);
+
+	(void) printf("DL_TEST_REQ:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->test_req.dl_flag,
+		dlp->test_req.dl_dest_addr_length,
+		dlp->test_req.dl_dest_addr_offset);
+	(void) printf("dest_addr %s\n", addr);
+}
+
+printdltestind(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+	u_char	src[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->test_ind.dl_dest_addr_offset),
+		dlp->test_ind.dl_dest_addr_length, dest);
+	addrtostring(OFFADDR(dlp, dlp->test_ind.dl_src_addr_offset),
+		dlp->test_ind.dl_src_addr_length, src);
+
+	(void) printf("DL_TEST_IND:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->test_ind.dl_flag,
+		dlp->test_ind.dl_dest_addr_length,
+		dlp->test_ind.dl_dest_addr_offset);
+	(void) printf("src_addr_length %d src_addr_offset %d\n",
+		dlp->test_ind.dl_src_addr_length,
+		dlp->test_ind.dl_src_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+	(void) printf("src_addr %s\n", src);
+}
+
+printdltestres(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->test_res.dl_dest_addr_offset),
+		dlp->test_res.dl_dest_addr_length, dest);
+
+	(void) printf("DL_TEST_RES:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->test_res.dl_flag,
+		dlp->test_res.dl_dest_addr_length,
+		dlp->test_res.dl_dest_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+}
+
+printdltestcon(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+	u_char	src[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->test_con.dl_dest_addr_offset),
+		dlp->test_con.dl_dest_addr_length, dest);
+	addrtostring(OFFADDR(dlp, dlp->test_con.dl_src_addr_offset),
+		dlp->test_con.dl_src_addr_length, src);
+
+	(void) printf("DL_TEST_CON:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->test_con.dl_flag,
+		dlp->test_con.dl_dest_addr_length,
+		dlp->test_con.dl_dest_addr_offset);
+	(void) printf("src_addr_length %d src_addr_offset %d\n",
+		dlp->test_con.dl_src_addr_length,
+		dlp->test_con.dl_src_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+	(void) printf("src_addr %s\n", src);
+}
+
+printdlxidreq(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->xid_req.dl_dest_addr_offset),
+		dlp->xid_req.dl_dest_addr_length, dest);
+
+	(void) printf("DL_XID_REQ:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->xid_req.dl_flag,
+		dlp->xid_req.dl_dest_addr_length,
+		dlp->xid_req.dl_dest_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+}
+
+printdlxidind(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+	u_char	src[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->xid_ind.dl_dest_addr_offset),
+		dlp->xid_ind.dl_dest_addr_length, dest);
+	addrtostring(OFFADDR(dlp, dlp->xid_ind.dl_src_addr_offset),
+		dlp->xid_ind.dl_src_addr_length, src);
+
+	(void) printf("DL_XID_IND:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->xid_ind.dl_flag,
+		dlp->xid_ind.dl_dest_addr_length,
+		dlp->xid_ind.dl_dest_addr_offset);
+	(void) printf("src_addr_length %d src_addr_offset %d\n",
+		dlp->xid_ind.dl_src_addr_length,
+		dlp->xid_ind.dl_src_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+	(void) printf("src_addr %s\n", src);
+}
+
+printdlxidres(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->xid_res.dl_dest_addr_offset),
+		dlp->xid_res.dl_dest_addr_length, dest);
+
+	(void) printf("DL_XID_RES:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->xid_res.dl_flag,
+		dlp->xid_res.dl_dest_addr_length,
+		dlp->xid_res.dl_dest_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+}
+
+printdlxidcon(dlp)
+union	DL_primitives	*dlp;
+{
+	u_char	dest[MAXDLADDR];
+	u_char	src[MAXDLADDR];
+
+	addrtostring(OFFADDR(dlp, dlp->xid_con.dl_dest_addr_offset),
+		dlp->xid_con.dl_dest_addr_length, dest);
+	addrtostring(OFFADDR(dlp, dlp->xid_con.dl_src_addr_offset),
+		dlp->xid_con.dl_src_addr_length, src);
+
+	(void) printf("DL_XID_CON:  flag 0x%x dest_addr_length %d dest_addr_offset %d\n",
+		dlp->xid_con.dl_flag,
+		dlp->xid_con.dl_dest_addr_length,
+		dlp->xid_con.dl_dest_addr_offset);
+	(void) printf("src_addr_length %d src_addr_offset %d\n",
+		dlp->xid_con.dl_src_addr_length,
+		dlp->xid_con.dl_src_addr_offset);
+	(void) printf("dest_addr %s\n", dest);
+	(void) printf("src_addr %s\n", src);
+}
+
+printdludqosreq(dlp)
+union	DL_primitives	*dlp;
+{
+	(void) printf("DL_UDQOS_REQ:  qos_length %d qos_offset %d\n",
+		dlp->udqos_req.dl_qos_length,
+		dlp->udqos_req.dl_qos_offset);
+}
+
+/*
+ * Return string.
+ */
+addrtostring(addr, length, s)
+u_char	*addr;
+u_long	length;
+u_char	*s;
+{
+	int	i;
+
+	for (i = 0; i < length; i++) {
+		(void) sprintf((char*) s, "%x:", addr[i] & 0xff);
+		s = s + strlen((char*)s);
+	}
+	if (length)
+		*(--s) = '\0';
+}
+
+/*
+ * Return length
+ */
+stringtoaddr(sp, addr)
+char	*sp;
+char	*addr;
+{
+	int	n = 0;
+	char	*p;
+	int	val;
+
+	p = sp;
+	while (p = strtok(p, ":")) {
+		if (sscanf(p, "%x", &val) != 1)
+			err("stringtoaddr:  invalid input string:  %s", sp);
+		if (val > 0xff)
+			err("stringtoaddr:  invalid input string:  %s", sp);
+		*addr++ = val;
+		n++;
+		p = NULL;
+	}
+	
+	return (n);
+}
+
+
+static char
+hexnibble(c)
+char	c;
+{
+	static	char	hextab[] = {
+		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+		'a', 'b', 'c', 'd', 'e', 'f'
+	};
+
+	return (hextab[c & 0x0f]);
+}
+
+char*
+dlprim(prim)
+u_long	prim;
+{
+	static	char	primbuf[80];
+
+	switch ((int)prim) {
+		CASERET(DL_INFO_REQ);
+		CASERET(DL_INFO_ACK);
+		CASERET(DL_ATTACH_REQ);
+		CASERET(DL_DETACH_REQ);
+		CASERET(DL_BIND_REQ);
+		CASERET(DL_BIND_ACK);
+		CASERET(DL_UNBIND_REQ);
+		CASERET(DL_OK_ACK);
+		CASERET(DL_ERROR_ACK);
+		CASERET(DL_SUBS_BIND_REQ);
+		CASERET(DL_SUBS_BIND_ACK);
+		CASERET(DL_UNITDATA_REQ);
+		CASERET(DL_UNITDATA_IND);
+		CASERET(DL_UDERROR_IND);
+		CASERET(DL_UDQOS_REQ);
+		CASERET(DL_CONNECT_REQ);
+		CASERET(DL_CONNECT_IND);
+		CASERET(DL_CONNECT_RES);
+		CASERET(DL_CONNECT_CON);
+		CASERET(DL_TOKEN_REQ);
+		CASERET(DL_TOKEN_ACK);
+		CASERET(DL_DISCONNECT_REQ);
+		CASERET(DL_DISCONNECT_IND);
+		CASERET(DL_RESET_REQ);
+		CASERET(DL_RESET_IND);
+		CASERET(DL_RESET_RES);
+		CASERET(DL_RESET_CON);
+		default:
+			(void) sprintf(primbuf, "unknown primitive 0x%x", prim);
+			return (primbuf);
+	}
+}
+
+
+char*
+dlstate(state)
+u_long	state;
+{
+	static	char	statebuf[80];
+
+	switch (state) {
+		CASERET(DL_UNATTACHED);
+		CASERET(DL_ATTACH_PENDING);
+		CASERET(DL_DETACH_PENDING);
+		CASERET(DL_UNBOUND);
+		CASERET(DL_BIND_PENDING);
+		CASERET(DL_UNBIND_PENDING);
+		CASERET(DL_IDLE);
+		CASERET(DL_UDQOS_PENDING);
+		CASERET(DL_OUTCON_PENDING);
+		CASERET(DL_INCON_PENDING);
+		CASERET(DL_CONN_RES_PENDING);
+		CASERET(DL_DATAXFER);
+		CASERET(DL_USER_RESET_PENDING);
+		CASERET(DL_PROV_RESET_PENDING);
+		CASERET(DL_RESET_RES_PENDING);
+		CASERET(DL_DISCON8_PENDING);
+		CASERET(DL_DISCON9_PENDING);
+		CASERET(DL_DISCON11_PENDING);
+		CASERET(DL_DISCON12_PENDING);
+		CASERET(DL_DISCON13_PENDING);
+		CASERET(DL_SUBS_BIND_PND);
+		default:
+			(void) sprintf(statebuf, "unknown state 0x%x", state);
+			return (statebuf);
+	}
+}
+
+char*
+dlerrno(errno)
+u_long	errno;
+{
+	static	char	errnobuf[80];
+
+	switch (errno) {
+		CASERET(DL_ACCESS);
+		CASERET(DL_BADADDR);
+		CASERET(DL_BADCORR);
+		CASERET(DL_BADDATA);
+		CASERET(DL_BADPPA);
+		CASERET(DL_BADPRIM);
+		CASERET(DL_BADQOSPARAM);
+		CASERET(DL_BADQOSTYPE);
+		CASERET(DL_BADSAP);
+		CASERET(DL_BADTOKEN);
+		CASERET(DL_BOUND);
+		CASERET(DL_INITFAILED);
+		CASERET(DL_NOADDR);
+		CASERET(DL_NOTINIT);
+		CASERET(DL_OUTSTATE);
+		CASERET(DL_SYSERR);
+		CASERET(DL_UNSUPPORTED);
+		CASERET(DL_UNDELIVERABLE);
+		CASERET(DL_NOTSUPPORTED);
+		CASERET(DL_TOOMANY);
+		CASERET(DL_NOTENAB);
+		CASERET(DL_BUSY);
+		CASERET(DL_NOAUTO);
+		CASERET(DL_NOXIDAUTO);
+		CASERET(DL_NOTESTAUTO);
+		CASERET(DL_XIDAUTO);
+		CASERET(DL_TESTAUTO);
+		CASERET(DL_PENDING);
+
+		default:
+			(void) sprintf(errnobuf, "unknown dlpi errno 0x%x", errno);
+			return (errnobuf);
+	}
+}
+
+char*
+dlpromisclevel(level)
+u_long	level;
+{
+	static	char	levelbuf[80];
+
+	switch (level) {
+		CASERET(DL_PROMISC_PHYS);
+		CASERET(DL_PROMISC_SAP);
+		CASERET(DL_PROMISC_MULTI);
+		default:
+			(void) sprintf(levelbuf, "unknown promisc level 0x%x", level);
+			return (levelbuf);
+	}
+}
+
+char*
+dlservicemode(servicemode)
+u_long	servicemode;
+{
+	static	char	servicemodebuf[80];
+
+	switch (servicemode) {
+		CASERET(DL_CODLS);
+		CASERET(DL_CLDLS);
+		CASERET(DL_CODLS|DL_CLDLS);
+		default:
+			(void) sprintf(servicemodebuf,
+				"unknown provider service mode 0x%x", servicemode);
+			return (servicemodebuf);
+	}
+}
+
+char*
+dlstyle(style)
+long	style;
+{
+	static	char	stylebuf[80];
+
+	switch (style) {
+		CASERET(DL_STYLE1);
+		CASERET(DL_STYLE2);
+		default:
+			(void) sprintf(stylebuf, "unknown provider style 0x%x", style);
+			return (stylebuf);
+	}
+}
+
+char*
+dlmactype(media)
+u_long	media;
+{
+	static	char	mediabuf[80];
+
+	switch (media) {
+		CASERET(DL_CSMACD);
+		CASERET(DL_TPB);
+		CASERET(DL_TPR);
+		CASERET(DL_METRO);
+		CASERET(DL_ETHER);
+		CASERET(DL_HDLC);
+		CASERET(DL_CHAR);
+		CASERET(DL_CTCA);
+		default:
+			(void) sprintf(mediabuf, "unknown media type 0x%x", media);
+			return (mediabuf);
+	}
+}
+
+/*VARARGS1*/
+err(fmt, a1, a2, a3, a4)
+char	*fmt;
+char	*a1, *a2, *a3, *a4;
+{
+	(void) fprintf(stderr, fmt, a1, a2, a3, a4);
+	(void) fprintf(stderr, "\n");
+	(void) exit(1);
+}
+
+syserr(s)
+char	*s;
+{
+	(void) perror(s);
+	exit(1);
+}
+
+strioctl(fd, cmd, timout, len, dp)
+int	fd;
+int	cmd;
+int	timout;
+int	len;
+char	*dp;
+{
+	struct	strioctl	sioc;
+	int	rc;
+
+	sioc.ic_cmd = cmd;
+	sioc.ic_timout = timout;
+	sioc.ic_len = len;
+	sioc.ic_dp = dp;
+	rc = ioctl(fd, I_STR, &sioc);
+
+	if (rc < 0)
+		return (rc);
+	else
+		return (sioc.ic_len);
+}
diff --git a/contrib/ipfilter/ipsend/dltest.h b/contrib/ipfilter/ipsend/dltest.h
new file mode 100644
index 0000000..4c32c30
--- /dev/null
+++ b/contrib/ipfilter/ipsend/dltest.h
@@ -0,0 +1,32 @@
+/*
+ * Common DLPI Test Suite header file
+ *
+ */
+
+/*
+ * Maximum control/data buffer size (in long's !!) for getmsg().
+ */
+#define		MAXDLBUF	8192
+
+/*
+ * Maximum number of seconds we'll wait for any
+ * particular DLPI acknowledgment from the provider
+ * after issuing a request.
+ */
+#define		MAXWAIT		15
+
+/*
+ * Maximum address buffer length.
+ */
+#define		MAXDLADDR	1024
+
+
+/*
+ * Handy macro.
+ */
+#define		OFFADDR(s, n)	(u_char*)((char*)(s) + (int)(n))
+
+/*
+ * externs go here
+ */
+extern	void	sigalrm();
diff --git a/contrib/ipfilter/ipsend/in_var.h b/contrib/ipfilter/ipsend/in_var.h
new file mode 100644
index 0000000..63980ef
--- /dev/null
+++ b/contrib/ipfilter/ipsend/in_var.h
@@ -0,0 +1,177 @@
+/*	@(#)in_var.h 1.3 88/08/19 SMI; from UCB 7.1 6/5/86	*/
+
+/*
+ * Copyright (c) 1985, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+
+/*
+ * Interface address, Internet version.  One of these structures
+ * is allocated for each interface with an Internet address.
+ * The ifaddr structure contains the protocol-independent part
+ * of the structure and is assumed to be first.
+ */
+
+#ifndef _netinet_in_var_h
+#define _netinet_in_var_h
+
+struct in_ifaddr {
+	struct	ifaddr ia_ifa;		/* protocol-independent info */
+#define	ia_addr	ia_ifa.ifa_addr
+#define	ia_broadaddr	ia_ifa.ifa_broadaddr
+#define	ia_dstaddr	ia_ifa.ifa_dstaddr
+#define	ia_ifp		ia_ifa.ifa_ifp
+	u_long	ia_net;			/* network number of interface */
+	u_long	ia_netmask;		/* mask of net part */
+	u_long	ia_subnet;		/* subnet number, including net */
+	u_long	ia_subnetmask;		/* mask of net + subnet */
+	struct	in_addr ia_netbroadcast; /* broadcast addr for (logical) net */
+	int	ia_flags;
+	struct	in_ifaddr *ia_next;	/* next in list of internet addresses */
+	struct	in_multi *ia_multiaddrs;/* list of multicast addresses */
+};
+/*
+ * Given a pointer to an in_ifaddr (ifaddr),
+ * return a pointer to the addr as a sockadd_in.
+ */
+#define	IA_SIN(ia) ((struct sockaddr_in *)(&((struct in_ifaddr *)ia)->ia_addr))
+/*
+ * ia_flags
+ */
+#define	IFA_ROUTE	0x01		/* routing entry installed */
+
+#ifdef	KERNEL
+struct	in_ifaddr *in_ifaddr;
+struct	in_ifaddr *in_iaonnetof();
+struct	ifqueue	ipintrq;		/* ip packet input queue */
+#endif
+
+#ifdef KERNEL
+/*
+ * Macro for finding the interface (ifnet structure) corresponding to one
+ * of our IP addresses.
+ */
+#define INADDR_TO_IFP(addr, ifp)					  \
+	/* struct in_addr addr; */					  \
+	/* struct ifnet  *ifp;  */					  \
+{									  \
+	register struct in_ifaddr *ia;					  \
+									  \
+	for (ia = in_ifaddr;						  \
+	     ia != NULL && IA_SIN(ia)->sin_addr.s_addr != (addr).s_addr;  \
+	     ia = ia->ia_next);						  \
+	(ifp) = (ia == NULL) ? NULL : ia->ia_ifp;			  \
+}
+
+/*
+ * Macro for finding the internet address structure (in_ifaddr) corresponding
+ * to a given interface (ifnet structure).
+ */
+#define IFP_TO_IA(ifp, ia)						  \
+	/* struct ifnet     *ifp; */					  \
+	/* struct in_ifaddr *ia;  */					  \
+{									  \
+	for ((ia) = in_ifaddr;						  \
+	     (ia) != NULL && (ia)->ia_ifp != (ifp);			  \
+	     (ia) = (ia)->ia_next);					  \
+}
+#endif KERNEL
+
+/*
+ * Per-interface router version information is kept in this list.
+ * This information should be part of the ifnet structure but we don't wish
+ * to change that - as it might break a number of things
+ */
+
+struct router_info {
+	struct ifnet *ifp;
+	int    type; /* type of router which is querier on this interface */
+	int    time; /* # of slow timeouts since last old query */
+	struct router_info *next;
+};
+
+/*
+ * Internet multicast address structure.  There is one of these for each IP
+ * multicast group to which this host belongs on a given network interface.
+ * They are kept in a linked list, rooted in the interface's in_ifaddr
+ * structure.
+ */
+
+struct in_multi {
+	struct in_addr	   inm_addr;	/* IP multicast address             */
+	struct ifnet      *inm_ifp;	/* back pointer to ifnet            */
+	struct in_ifaddr  *inm_ia;	/* back pointer to in_ifaddr        */
+	u_int		   inm_refcount;/* no. membership claims by sockets */
+	u_int		   inm_timer;	/* IGMP membership report timer     */
+	struct in_multi   *inm_next;	/* ptr to next multicast address    */
+	u_int              inm_state;   /*  state of the membership */
+	struct router_info *inm_rti;     /* router info*/
+};
+
+#ifdef KERNEL
+/*
+ * Structure used by macros below to remember position when stepping through
+ * all of the in_multi records.
+ */
+struct in_multistep {
+	struct in_ifaddr *i_ia;
+	struct in_multi  *i_inm;
+};
+
+/*
+ * Macro for looking up the in_multi record for a given IP multicast address
+ * on a given interface.  If no matching record is found, "inm" returns NULL.
+ */
+#define IN_LOOKUP_MULTI(addr, ifp, inm)					    \
+	/* struct in_addr  addr; */					    \
+	/* struct ifnet    *ifp; */					    \
+	/* struct in_multi *inm; */					    \
+{									    \
+	register struct in_ifaddr *ia;					    \
+									    \
+	IFP_TO_IA((ifp), ia);						    \
+	if (ia == NULL)							    \
+		(inm) = NULL;						    \
+	else								    \
+	    for ((inm) = ia->ia_multiaddrs;				    \
+		 (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr;  \
+		 (inm) = inm->inm_next);				    \
+}
+
+/*
+ * Macro to step through all of the in_multi records, one at a time.
+ * The current position is remembered in "step", which the caller must
+ * provide.  IN_FIRST_MULTI(), below, must be called to initialize "step"
+ * and get the first record.  Both macros return a NULL "inm" when there
+ * are no remaining records.
+ */
+#define IN_NEXT_MULTI(step, inm)					\
+	/* struct in_multistep  step; */				\
+	/* struct in_multi     *inm;  */				\
+{									\
+	if (((inm) = (step).i_inm) != NULL) {				\
+		(step).i_inm = (inm)->inm_next;				\
+	}								\
+	else while ((step).i_ia != NULL) {				\
+		(inm) = (step).i_ia->ia_multiaddrs;			\
+		(step).i_ia = (step).i_ia->ia_next;			\
+		if ((inm) != NULL) {					\
+			(step).i_inm = (inm)->inm_next;			\
+			break;						\
+		}							\
+	}								\
+}
+
+#define IN_FIRST_MULTI(step, inm)					\
+	/* struct in_multistep  step; */				\
+	/* struct in_multi     *inm;  */				\
+{									\
+	(step).i_ia  = in_ifaddr;					\
+	(step).i_inm = NULL;						\
+	IN_NEXT_MULTI((step), (inm));					\
+}
+
+struct in_multi *in_addmulti();
+#endif KERNEL
+#endif /*!_netinet_in_var_h*/
diff --git a/contrib/ipfilter/ipsend/ip.c b/contrib/ipfilter/ipsend/ip.c
new file mode 100644
index 0000000..2c7f7ff
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ip.c
@@ -0,0 +1,346 @@
+/*
+ * ip.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "%W% %G% (C)1995";
+#endif
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in_systm.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include "tcpip.h"
+#endif
+
+
+static	char	*ipbuf = NULL, *ethbuf = NULL;
+
+extern	int	arp(), sendip();
+
+u_short	chksum(buf,len)
+u_short	*buf;
+int	len;
+{
+	u_long	sum = 0;
+	int	nwords = len >> 1;
+
+	for(; nwords > 0; nwords--)
+		sum += *buf++;
+	sum = (sum>>16) + (sum & 0xffff);
+	sum += (sum >>16);
+	return (~sum);
+}
+
+
+int	send_ether(nfd, buf, len, gwip)
+int	nfd, len;
+char	*buf;
+struct	in_addr	gwip;
+{
+	static	struct	in_addr	last_gw;
+	static	char	last_arp[6] = { 0, 0, 0, 0, 0, 0};
+	ether_header_t	*eh;
+	char	*s;
+	int	err;
+
+	if (!ethbuf)
+		ethbuf = (char *)calloc(1, 65536+1024);
+	s = ethbuf;
+	eh = (ether_header_t *)s;
+
+	bcopy((char *)buf, s + sizeof(*eh), len);
+	if (gwip.s_addr == last_gw.s_addr)
+		bcopy(last_arp, (char *)&eh->ether_dhost, 6);
+	else if (arp((char *)&gwip, &eh->ether_dhost) == -1)
+	    {
+		perror("arp");
+		return -2;
+	    }
+	eh->ether_type = ETHERTYPE_IP;
+	last_gw.s_addr = gwip.s_addr;
+	err = sendip(nfd, s, sizeof(*eh) + len);
+	return err;
+}
+
+
+/*
+ */
+int	send_ip(nfd, mtu, ip, gwip, frag)
+int	nfd, mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	frag;
+{
+	static	struct	in_addr	last_gw;
+	static	char	last_arp[6] = { 0, 0, 0, 0, 0, 0};
+	static	u_short	id = 0;
+	ether_header_t	*eh;
+	ip_t	ipsv;
+	int	err;
+
+	if (!ipbuf)
+		ipbuf = (char *)malloc(65536);
+	eh = (ether_header_t *)ipbuf;
+
+	bzero((char *)&eh->ether_shost, sizeof(eh->ether_shost));
+	if (last_gw.s_addr && (gwip.s_addr == last_gw.s_addr))
+		bcopy(last_arp, (char *)&eh->ether_dhost, 6);
+	else if (arp((char *)&gwip, &eh->ether_dhost) == -1)
+	    {
+		perror("arp");
+		return -2;
+	    }
+	bcopy((char *)&eh->ether_dhost, last_arp, sizeof(last_arp));
+	eh->ether_type = ETHERTYPE_IP;
+
+	bcopy((char *)ip, (char *)&ipsv, sizeof(*ip));
+	last_gw.s_addr = gwip.s_addr;
+	ip->ip_len = htons(ip->ip_len);
+	ip->ip_off = htons(ip->ip_off);
+	if (!ip->ip_v)
+		ip->ip_v   = IPVERSION;
+	if (!ip->ip_id)
+		ip->ip_id  = htons(id++);
+	if (!ip->ip_ttl)
+		ip->ip_ttl = 60;
+
+	if (!frag || (sizeof(*eh) + ntohs(ip->ip_len) < mtu))
+	    {
+		ip->ip_sum = 0;
+		ip->ip_sum = chksum(ip, ip->ip_hl << 2);
+
+		bcopy((char *)ip, ipbuf + sizeof(*eh), ntohs(ip->ip_len));
+		err =  sendip(nfd, ipbuf, sizeof(*eh) + ntohs(ip->ip_len));
+	    }
+	else
+	    {
+		/*
+		 * Actually, this is bogus because we're putting all IP
+		 * options in every packet, which isn't always what should be
+		 * done.  Will do for now.
+		 */
+		ether_header_t	eth;
+		char	optcpy[48], ol;
+		char	*s;
+		int	i, iplen, sent = 0, ts, hlen, olen;
+
+		hlen = ip->ip_hl << 2;
+		if (mtu < (hlen + 8)) {
+			fprintf(stderr, "mtu (%d) < ip header size (%d) + 8\n",
+				mtu, hlen);
+			fprintf(stderr, "can't fragment data\n");
+			return -2;
+		}
+		ol = (ip->ip_hl << 2) - sizeof(*ip);
+		for (i = 0, s = (char*)(ip + 1); ol > 0; )
+			if (*s == IPOPT_EOL) {
+				optcpy[i++] = *s;
+				break;
+			} else if (*s == IPOPT_NOP) {
+				s++;
+				ol--;
+			} else
+			    {
+				olen = (int)(*(u_char *)(s + 1));
+				ol -= olen;
+				if (IPOPT_COPIED(*s))
+				    {
+					bcopy(s, optcpy + i, olen);
+					i += olen;
+					s += olen;
+				    }
+			    }
+		if (i)
+		    {
+			/*
+			 * pad out
+			 */
+			while ((i & 3) && (i & 3) != 3)
+				optcpy[i++] = IPOPT_NOP;
+			if ((i & 3) == 3)
+				optcpy[i++] = IPOPT_EOL;
+		    }
+
+		bcopy((char *)eh, (char *)&eth, sizeof(eth));
+		s = (char *)ip + hlen;
+		iplen = ntohs(ip->ip_len) - hlen;
+		ip->ip_off |= htons(IP_MF);
+
+		while (1)
+		    {
+			if ((sent + (mtu - hlen)) >= iplen)
+			    {
+				ip->ip_off ^= htons(IP_MF);
+				ts = iplen - sent;
+			    }
+			else
+				ts = (mtu - hlen);
+			ip->ip_off &= htons(0xe000);
+			ip->ip_off |= htons(sent >> 3);
+			ts += hlen;
+			ip->ip_len = htons(ts);
+			ip->ip_sum = 0;
+			ip->ip_sum = chksum(ip, hlen);
+			bcopy((char *)ip, ipbuf + sizeof(*eh), hlen);
+			bcopy(s + sent, ipbuf + sizeof(*eh) + hlen, ts - hlen);
+			err =  sendip(nfd, ipbuf, sizeof(*eh) + ts);
+
+			bcopy((char *)&eth, ipbuf, sizeof(eth));
+			sent += (ts - hlen);
+			if (!(ntohs(ip->ip_off) & IP_MF))
+				break;
+			else if (!(ip->ip_off & htons(0x1fff)))
+			    {
+				hlen = i + sizeof(*ip);
+				ip->ip_hl = (sizeof(*ip) + i) >> 2;
+				bcopy(optcpy, (char *)(ip + 1), i);
+			    }
+		    }
+	    }
+
+	bcopy((char *)&ipsv, (char *)ip, sizeof(*ip));
+	return err;
+}
+
+
+/*
+ * send a tcp packet.
+ */
+int	send_tcp(nfd, mtu, ip, gwip)
+int	nfd, mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+{
+	static	tcp_seq	iss = 2;
+	struct	tcpiphdr *ti;
+	int	thlen, i;
+	u_long	lbuf[20];
+
+	ti = (struct tcpiphdr *)lbuf;
+	bzero((char *)ti, sizeof(*ti));
+	thlen = sizeof(tcphdr_t);
+	ip->ip_p = IPPROTO_TCP;
+	ti->ti_pr = ip->ip_p;
+	ti->ti_src = ip->ip_src;
+	ti->ti_dst = ip->ip_dst;
+	bcopy((char *)ip + (ip->ip_hl << 2),
+	      (char *)&ti->ti_sport, sizeof(tcphdr_t));
+
+	if (!ti->ti_win)
+		ti->ti_win = htons(4096);
+	if (!ti->ti_seq)
+		ti->ti_seq = htonl(iss);
+	iss += 64;
+
+	if ((ti->ti_flags == TH_SYN) && !ip->ip_off)
+	    {
+		ip = (ip_t *)realloc((char *)ip, ntohs(ip->ip_len) + 4);
+		i = sizeof(struct tcpiphdr) / sizeof(long);
+		lbuf[i] = htonl(0x020405b4);
+		bcopy((char *)(lbuf + i), (char*)ip + ntohs(ip->ip_len),
+		      sizeof(u_long));
+		thlen += 4;
+	    }
+	if (!ti->ti_off)
+		ti->ti_off = thlen >> 2;
+	ti->ti_len = htons(thlen);
+	ip->ip_len = (ip->ip_hl << 2) + thlen;
+	ti->ti_sum = 0;
+	ti->ti_sum = chksum(ti, thlen + sizeof(ip_t));
+
+	bcopy((char *)&ti->ti_sport,
+	      (char *)ip + (ip->ip_hl << 2), thlen);
+	return send_ip(nfd, mtu, ip, gwip, 1);
+}
+
+
+/*
+ * send a udp packet.
+ */
+int	send_udp(nfd, mtu, ip, gwip)
+int	nfd, mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+{
+	struct	tcpiphdr *ti;
+	int	thlen;
+	u_long	lbuf[20];
+
+	ti = (struct tcpiphdr *)lbuf;
+	bzero((char *)ti, sizeof(*ti));
+	thlen = sizeof(udphdr_t);
+	ti->ti_pr = ip->ip_p;
+	ti->ti_src = ip->ip_src;
+	ti->ti_dst = ip->ip_dst;
+	bcopy((char *)ip + (ip->ip_hl << 2),
+	      (char *)&ti->ti_sport, sizeof(udphdr_t));
+
+	ti->ti_len = htons(thlen);
+	ip->ip_len = (ip->ip_hl << 2) + thlen;
+	ti->ti_sum = 0;
+	ti->ti_sum = chksum(ti, thlen + sizeof(ip_t));
+
+	bcopy((char *)&ti->ti_sport,
+	      (char *)ip + (ip->ip_hl << 2), sizeof(udphdr_t));
+	return send_ip(nfd, mtu, ip, gwip, 1);
+}
+
+
+/*
+ * send an icmp packet.
+ */
+int	send_icmp(nfd, mtu, ip, gwip)
+int	nfd, mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+{
+	struct	icmp	*ic;
+
+	ic = (struct icmp *)((char *)ip + (ip->ip_hl << 2));
+
+	ic->icmp_cksum = 0;
+	ic->icmp_cksum = chksum((char *)ic, sizeof(struct icmp));
+
+	return send_ip(nfd, mtu, ip, gwip, 1);
+}
+
+
+int	send_packet(nfd, mtu, ip, gwip)
+int	nfd, mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+{
+        switch (ip->ip_p)
+        {
+        case IPPROTO_TCP :
+                return send_tcp(nfd, mtu, ip, gwip);
+        case IPPROTO_UDP :
+                return send_udp(nfd, mtu, ip, gwip);
+        case IPPROTO_ICMP :
+                return send_icmp(nfd, mtu, ip, gwip);
+        default :
+                return send_ip(nfd, mtu, ip, gwip, 1);
+        }
+}
diff --git a/contrib/ipfilter/ipsend/ip_compat.h b/contrib/ipfilter/ipsend/ip_compat.h
new file mode 100644
index 0000000..c38fa59
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ip_compat.h
@@ -0,0 +1,242 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ *
+ * @(#)ip_compat.h	1.2 12/7/95
+ */
+
+/*
+ * These #ifdef's are here mainly for linux, but who knows, they may
+ * not be in other places or maybe one day linux will grow up and some
+ * of these will turn up there too.
+ */
+#ifndef	ICMP_UNREACH
+# define	ICMP_UNREACH	ICMP_DEST_UNREACH
+#endif
+#ifndef	ICMP_SOURCEQUENCH
+# define	ICMP_SOURCEQUENCH	ICMP_SOURCE_QUENCH
+#endif
+#ifndef	ICMP_TIMXCEED
+# define	ICMP_TIMXCEED	ICMP_TIME_EXCEEDED
+#endif
+#ifndef	ICMP_PARAMPROB
+# define	ICMP_PARAMPROB	ICMP_PARAMETERPROB
+#endif
+#ifndef	IPVERSION
+# define	IPVERSION	4
+#endif
+#ifndef	IPOPT_MINOFF
+# define	IPOPT_MINOFF	4
+#endif
+#ifndef	IPOPT_COPIED
+# define	IPOPT_COPIED(x)	((x)&0x80)
+#endif
+#ifndef	IPOPT_EOL
+# define	IPOPT_EOL	0
+#endif
+#ifndef	IPOPT_NOP
+# define	IPOPT_NOP	1
+#endif
+#ifndef	IP_MF
+# define	IP_MF	((u_short)0x2000)
+#endif
+#ifndef	ETHERTYPE_IP
+# define	ETHERTYPE_IP	((u_short)0x0800)
+#endif
+#ifndef	TH_FIN
+# define	TH_FIN	0x01
+#endif
+#ifndef	TH_SYN
+# define	TH_SYN	0x02
+#endif
+#ifndef	TH_RST
+# define	TH_RST	0x04
+#endif
+#ifndef	TH_PUSH
+# define	TH_PUSH	0x08
+#endif
+#ifndef	TH_ACK
+# define	TH_ACK	0x10
+#endif
+#ifndef	TH_URG
+# define	TH_URG	0x20
+#endif
+#ifndef	IPOPT_EOL
+# define	IPOPT_EOL	0
+#endif
+#ifndef	IPOPT_NOP
+# define	IPOPT_NOP	1
+#endif
+#ifndef	IPOPT_RR
+# define	IPOPT_RR	7
+#endif
+#ifndef	IPOPT_TS
+# define	IPOPT_TS	68
+#endif
+#ifndef	IPOPT_SECURITY
+# define	IPOPT_SECURITY	130
+#endif
+#ifndef	IPOPT_LSRR
+# define	IPOPT_LSRR	131
+#endif
+#ifndef	IPOPT_SATID
+# define	IPOPT_SATID	136
+#endif
+#ifndef	IPOPT_SSRR
+# define	IPOPT_SSRR	137
+#endif
+#ifndef	IPOPT_SECUR_UNCLASS
+# define	IPOPT_SECUR_UNCLASS	((u_short)0x0000)
+#endif
+#ifndef	IPOPT_SECUR_CONFID
+# define	IPOPT_SECUR_CONFID	((u_short)0xf135)
+#endif
+#ifndef	IPOPT_SECUR_EFTO
+# define	IPOPT_SECUR_EFTO	((u_short)0x789a)
+#endif
+#ifndef	IPOPT_SECUR_MMMM
+# define	IPOPT_SECUR_MMMM	((u_short)0xbc4d)
+#endif
+#ifndef	IPOPT_SECUR_RESTR
+# define	IPOPT_SECUR_RESTR	((u_short)0xaf13)
+#endif
+#ifndef	IPOPT_SECUR_SECRET
+# define	IPOPT_SECUR_SECRET	((u_short)0xd788)
+#endif
+#ifndef IPOPT_SECUR_TOPSECRET
+# define	IPOPT_SECUR_TOPSECRET	((u_short)0x6bc5)
+#endif
+
+#ifdef linux
+# if LINUX < 0200
+#  define	icmp	icmphdr
+#  define	icmp_type	type
+#  define	icmp_code	code
+# endif
+
+/*
+ * From /usr/include/netinet/ip_var.h
+ * !%@#!$@# linux...
+ */
+struct ipovly {
+	caddr_t	ih_next, ih_prev;	/* for protocol sequence q's */
+	u_char	ih_x1;			/* (unused) */
+	u_char	ih_pr;			/* protocol */
+	short	ih_len;			/* protocol length */
+	struct	in_addr ih_src;		/* source internet address */
+	struct	in_addr ih_dst;		/* destination internet address */
+};
+
+typedef	struct	{
+	__u16	th_sport;
+	__u16	th_dport;
+	__u32	th_seq;
+	__u32	th_ack;
+# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
+    defined(vax)
+	__u8	th_res:4;
+	__u8	th_off:4;
+#else
+	__u8	th_off:4;
+	__u8	th_res:4;
+#endif
+	__u8	th_flags;
+	__u16	th_win;
+	__u16	th_sum;
+	__u16	th_urp;
+} tcphdr_t;
+
+typedef	struct	{
+	__u16	uh_sport;
+	__u16	uh_dport;
+	__s16	uh_ulen;
+	__u16	uh_sum;
+} udphdr_t;
+
+typedef	struct	{
+# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) ||\
+    defined(vax)
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# else
+	__u8	ip_hl:4;
+	__u8	ip_v:4;
+# endif
+	__u8	ip_tos;
+	__u16	ip_len;
+	__u16	ip_id;
+	__u16	ip_off;
+	__u8	ip_ttl;
+	__u8	ip_p;
+	__u16	ip_sum;
+	struct	in_addr	ip_src;
+	struct	in_addr	ip_dst;
+} ip_t;
+
+typedef	struct	{
+	__u8	ether_dhost[6];
+	__u8	ether_shost[6];
+	__u16	ether_type;
+} ether_header_t;
+
+typedef struct icmp {
+	u_char	icmp_type;		/* type of message, see below */
+	u_char	icmp_code;		/* type sub code */
+	u_short	icmp_cksum;		/* ones complement cksum of struct */
+	union {
+		u_char ih_pptr;			/* ICMP_PARAMPROB */
+		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
+		struct ih_idseq {
+			n_short	icd_id;
+			n_short	icd_seq;
+		} ih_idseq;
+		int ih_void;
+	} icmp_hun;
+#define	icmp_pptr	icmp_hun.ih_pptr
+#define	icmp_gwaddr	icmp_hun.ih_gwaddr
+#define	icmp_id		icmp_hun.ih_idseq.icd_id
+#define	icmp_seq	icmp_hun.ih_idseq.icd_seq
+#define	icmp_void	icmp_hun.ih_void
+	union {
+		struct id_ts {
+			n_time its_otime;
+			n_time its_rtime;
+			n_time its_ttime;
+		} id_ts;
+		struct id_ip  {
+			ip_t idi_ip;
+			/* options and then 64 bits of data */
+		} id_ip;
+		u_long	id_mask;
+		char	id_data[1];
+	} icmp_dun;
+#define	icmp_otime	icmp_dun.id_ts.its_otime
+#define	icmp_rtime	icmp_dun.id_ts.its_rtime
+#define	icmp_ttime	icmp_dun.id_ts.its_ttime
+#define	icmp_ip		icmp_dun.id_ip.idi_ip
+#define	icmp_mask	icmp_dun.id_mask
+#define	icmp_data	icmp_dun.id_data
+} icmphdr_t;
+
+# define	bcopy(a,b,c)	memmove(b,a,c)
+# define	bcmp(a,b,c)	memcmp(a,b,c)
+
+# define	ifnet	device
+
+#else
+
+typedef	struct	udphdr	udphdr_t;
+typedef	struct	tcphdr	tcphdr_t;
+typedef	struct	ip	ip_t;
+typedef	struct	ether_header	ether_header_t;
+
+#endif
+
+#if defined(__SVR4) || defined(__svr4__)
+# define	bcopy(a,b,c)	memmove(b,a,c)
+# define	bcmp(a,b,c)	memcmp(a,b,c)
+# define	bzero(a,b)	memset(a,0,b)
+#endif
diff --git a/contrib/ipfilter/ipsend/ip_var.h b/contrib/ipfilter/ipsend/ip_var.h
new file mode 100644
index 0000000..92eb38a
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ip_var.h
@@ -0,0 +1,123 @@
+/*	@(#)ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86	*/
+
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+
+/*
+ * Overlay for ip header used by other protocols (tcp, udp).
+ */
+
+#ifndef _netinet_ip_var_h
+#define _netinet_ip_var_h
+
+struct ipovly {
+	caddr_t	ih_next, ih_prev;	/* for protocol sequence q's */
+	u_char	ih_x1;			/* (unused) */
+	u_char	ih_pr;			/* protocol */
+	short	ih_len;			/* protocol length */
+	struct	in_addr ih_src;		/* source internet address */
+	struct	in_addr ih_dst;		/* destination internet address */
+};
+
+/*
+ * Ip reassembly queue structure.  Each fragment
+ * being reassembled is attached to one of these structures.
+ * They are timed out after ipq_ttl drops to 0, and may also
+ * be reclaimed if memory becomes tight.
+ */
+struct ipq {
+	struct	ipq *next,*prev;	/* to other reass headers */
+	u_char	ipq_ttl;		/* time for reass q to live */
+	u_char	ipq_p;			/* protocol of this fragment */
+	u_short	ipq_id;			/* sequence id for reassembly */
+	struct	ipasfrag *ipq_next,*ipq_prev;
+					/* to ip headers of fragments */
+	struct	in_addr ipq_src,ipq_dst;
+};
+
+/*
+ * Ip header, when holding a fragment.
+ *
+ * Note: ipf_next must be at same offset as ipq_next above
+ */
+struct	ipasfrag {
+#if defined(vax) || defined(i386)
+	u_char	ip_hl:4,
+		ip_v:4;
+#endif
+#if defined(mc68000) || defined(sparc)
+	u_char	ip_v:4,
+		ip_hl:4;
+#endif
+	u_char	ipf_mff;		/* copied from (ip_off&IP_MF) */
+	short	ip_len;
+	u_short	ip_id;
+	short	ip_off;
+	u_char	ip_ttl;
+	u_char	ip_p;
+	u_short	ip_sum;
+	struct	ipasfrag *ipf_next;	/* next fragment */
+	struct	ipasfrag *ipf_prev;	/* previous fragment */
+};
+
+/*
+ * Structure stored in mbuf in inpcb.ip_options
+ * and passed to ip_output when ip options are in use.
+ * The actual length of the options (including ipopt_dst)
+ * is in m_len.
+ */
+#define MAX_IPOPTLEN	40
+
+struct ipoption {
+	struct	in_addr ipopt_dst;	/* first-hop dst if source routed */
+	char	ipopt_list[MAX_IPOPTLEN];	/* options proper */
+};
+
+/*
+ * Structure stored in an mbuf attached to inpcb.ip_moptions and
+ * passed to ip_output when IP multicast options are in use.
+ */
+struct ip_moptions {
+	struct	ifnet   *imo_multicast_ifp;  /* ifp for outgoing multicasts */
+	u_char		 imo_multicast_ttl;  /* TTL for outgoing multicasts */
+	u_char		 imo_multicast_loop; /* 1 => hear sends if a member */
+	u_short		 imo_num_memberships;/* no. memberships this socket */
+	struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
+#ifdef RSVP_ISI
+	long		 imo_multicast_vif;  /* vif for outgoing multicasts */
+#endif /* RSVP_ISI */
+};
+
+struct	ipstat {
+	long	ips_total;		/* total packets received */
+	long	ips_badsum;		/* checksum bad */
+	long	ips_tooshort;		/* packet too short */
+	long	ips_toosmall;		/* not enough data */
+	long	ips_badhlen;		/* ip header length < data size */
+	long	ips_badlen;		/* ip length < ip header length */
+	long	ips_fragments;		/* fragments received */
+	long	ips_fragdropped;	/* frags dropped (dups, out of space) */
+	long	ips_fragtimeout;	/* fragments timed out */
+	long	ips_forward;		/* packets forwarded */
+	long	ips_cantforward;	/* packets rcvd for unreachable dest */
+	long	ips_redirectsent;	/* packets forwarded on same net */
+};
+
+#ifdef KERNEL
+/* flags passed to ip_output as last parameter */
+#define	IP_FORWARDING		0x1		/* most of ip header exists */
+#define IP_MULTICASTOPTS	0x2		/* multicast opts present */
+#define	IP_ROUTETOIF		SO_DONTROUTE	/* bypass routing tables */
+#define	IP_ALLOWBROADCAST	SO_BROADCAST	/* can send broadcast packets */
+
+struct	ipstat	ipstat;
+struct	ipq	ipq;			/* ip reass. queue */
+u_short	ip_id;				/* ip packet ctr, for ids */
+
+struct	mbuf *ip_srcroute();
+#endif
+
+#endif /*!_netinet_ip_var_h*/
diff --git a/contrib/ipfilter/ipsend/ipresend.c b/contrib/ipfilter/ipsend/ipresend.c
new file mode 100644
index 0000000..6fd91bf
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ipresend.c
@@ -0,0 +1,165 @@
+/*
+ * ipsend.c (C) 1995 Darren Reed
+ *
+ * This was written to test what size TCP fragments would get through
+ * various TCP/IP packet filters, as used in IP firewalls.  In certain
+ * conditions, enough of the TCP header is missing for unpredictable
+ * results unless the filter is aware that this can happen.
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ *
+ * This was written and tested (successfully) on SunOS 4.1.x.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "%W% %G% (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipt.h"
+
+
+extern	char	*optarg;
+extern	int	optind;
+#ifndef	NO_IPF
+extern	struct	ipread	snoop, pcap, etherf, iphex, tcpd, iptext;
+#endif
+extern	int	resolve(), ip_resend();
+
+int	opts = 0;
+#ifndef	DEFAULT_DEVICE
+# ifdef	linux
+char	default_device[] = "eth0";
+# else
+#  ifdef	sun
+char	default_device[] = "le0";
+#  else
+#   ifdef	ultrix
+char	default_device[] = "ln0";
+#   else
+#    ifdef	__bsdi__
+char	default_device[] = "ef0";
+#    else
+char	default_device[] = "lan0";
+#    endif
+#   endif
+#  endif
+# endif
+#else
+char	default_device[] = DEFAULT_DEVICE;
+#endif
+
+
+void	usage(prog)
+char	*prog;
+{
+	fprintf(stderr, "Usage: %s [options] <-r filename|-R filename>\n\
+\t\t-r filename\tsnoop data file to resend\n\
+\t\t-R filename\tlibpcap data file to resend\n\
+\toptions:\n\
+\t\t-d device\tSend out on this device\n\
+\t\t-g gateway\tIP gateway to use if non-local dest.\n\
+\t\t-m mtu\t\tfake MTU to use when sending out\n\
+", prog);
+	exit(1);
+}
+
+
+int main(argc, argv)
+int	argc;
+char	**argv;
+{
+	struct	in_addr	gwip;
+	struct	ipread	*ipr = NULL;
+	char	*name =  argv[0], *gateway = NULL, *dev = NULL;
+	char	c, *resend = NULL;
+	int	mtu = 1500;
+
+	while ((c = getopt(argc, argv, "EHPSTXd:g:m:r:")) != -1)
+		switch (c)
+		{
+		case 'd' :
+			dev = optarg;
+			break;
+		case 'g' :
+			gateway = optarg;
+			break;
+		case 'm' :
+			mtu = atoi(optarg);
+			if (mtu < 28)
+			    {
+				fprintf(stderr, "mtu must be > 28\n");
+				exit(1);
+			    }
+		case 'r' :
+			resend = optarg;
+			break;
+#ifndef	NO_IPF
+		case 'E' :
+			ipr = &etherf;
+			break;
+		case 'H' :
+			ipr = &iphex;
+			break;
+		case 'P' :
+			ipr = &pcap;
+			break;
+		case 'S' :
+			ipr = &snoop;
+			break;
+		case 'T' :
+			ipr = &tcpd;
+			break;
+		case 'X' :
+			ipr = &iptext;
+			break;
+#endif
+		default :
+			fprintf(stderr, "Unknown option \"%c\"\n", c);
+			usage(name);
+		}
+
+	if (!ipr || !resend)
+		usage(name);
+
+	gwip.s_addr = 0;
+	if (gateway && resolve(gateway, (char *)&gwip) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", gateway);
+		exit(2);
+	    }
+
+	if (!dev)
+		dev = default_device;
+
+	printf("Device:  %s\n", dev);
+	printf("Gateway: %s\n", inet_ntoa(gwip));
+	printf("mtu:     %d\n", mtu);
+
+	return ip_resend(dev, mtu, ipr, gwip, resend);
+}
diff --git a/contrib/ipfilter/ipsend/ipsend.c b/contrib/ipfilter/ipsend/ipsend.c
new file mode 100644
index 0000000..e45d3ee
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ipsend.c
@@ -0,0 +1,350 @@
+/*
+ * ipsend.c (C) 1995 Darren Reed
+ *
+ * This was written to test what size TCP fragments would get through
+ * various TCP/IP packet filters, as used in IP firewalls.  In certain
+ * conditions, enough of the TCP header is missing for unpredictable
+ * results unless the filter is aware that this can happen.
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ *
+ * This was written and tested (successfully) on SunOS 4.1.x.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipsend.c	1.5 12/10/95 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipt.h"
+
+
+extern	char	*optarg;
+extern	int	optind;
+
+extern	int	resolve(), optname(), initdevice(), send_packet();
+
+char	options[68];
+#ifdef	linux
+char	default_device[] = "eth0";
+#else
+# ifdef	sun
+char	default_device[] = "le0";
+# else
+#  ifdef	ultrix
+char	default_device[] = "ln0";
+#  else
+#   ifdef	__bsdi__
+char	default_device[] = "ef0";
+#   else
+char	default_device[] = "lan0";
+#   endif
+#  endif
+# endif
+#endif
+
+
+void	usage(prog)
+char	*prog;
+{
+	fprintf(stderr, "Usage: %s [options] dest [flags]\n\
+\toptions:\n\
+\t\t-d device\tSend out on this device\n\
+\t\t-f fragflags\tcan set IP_MF or IP_DF\n\
+\t\t-g gateway\tIP gateway to use if non-local dest.\n\
+\t\t-I code,type[,gw[,dst[,src]]]\tSet ICMP protocol\n\
+\t\t-m mtu\t\tfake MTU to use when sending out\n\
+\t\t-P protocol\tSet protocol by name\n\
+\t\t-s src\t\tsource address for IP packet\n\
+\t\t-T\t\tSet TCP protocol\n\
+\t\t-t port\t\tdestination port\n\
+\t\t-U\t\tSet UDP protocol\n\
+", prog);
+	exit(1);
+}
+
+
+void do_icmp(ip, args)
+ip_t *ip;
+char *args;
+{
+	struct	icmp	*ic;
+	char	*s;
+
+	ip->ip_p = IPPROTO_ICMP;
+	ip->ip_len += sizeof(*ic);
+	ic = (struct icmp *)(ip + 1);
+	bzero((char *)ic, sizeof(*ic));
+	if (!(s = strchr(args, ',')))
+	    {
+		fprintf(stderr, "ICMP args missing: ,\n");
+		return;
+	    }
+	*s++ = '\0';
+	ic->icmp_type = atoi(args);
+	ic->icmp_code = atoi(s);
+	if (ic->icmp_type == ICMP_REDIRECT && strchr(s, ','))
+	    {
+		char	*t;
+
+		t = strtok(s, ",");
+		t = strtok(NULL, ",");
+		if (resolve(t, (char *)&ic->icmp_gwaddr) == -1)
+		    {
+			fprintf(stderr,"Cant resolve %s\n", t);
+			exit(2);
+		    }
+		if ((t = strtok(NULL, ",")))
+		    {
+			if (resolve(t, (char *)&ic->icmp_ip.ip_dst) == -1)
+			    {
+				fprintf(stderr,"Cant resolve %s\n", t);
+				exit(2);
+			    }
+			if ((t = strtok(NULL, ",")))
+			    {
+				if (resolve(t,
+					    (char *)&ic->icmp_ip.ip_src) == -1)
+				    {
+					fprintf(stderr,"Cant resolve %s\n", t);
+					exit(2);
+				    }
+			    }
+		    }
+	    }
+}
+
+
+int send_packets(dev, mtu, ip, gwip)
+char *dev;
+int mtu;
+ip_t *ip;
+struct in_addr gwip;
+{
+	u_short	sport = 0;
+	int	wfd;
+
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		sport = ((struct tcpiphdr *)ip)->ti_sport;
+	wfd = initdevice(dev, sport, 5);
+
+	return send_packet(wfd, mtu, ip, gwip);
+}
+
+
+int main(argc, argv)
+int	argc;
+char	**argv;
+{
+	struct	tcpiphdr *ti;
+	struct	in_addr	gwip;
+	tcphdr_t	*tcp;
+	ip_t	*ip;
+	char	*name =  argv[0], host[64], *gateway = NULL, *dev = NULL;
+	char	*src = NULL, *dst, c, *s;
+	int	mtu = 1500, olen = 0;
+
+	/*
+	 * 65535 is maximum packet size...you never know...
+	 */
+	ip = (ip_t *)calloc(1, 65536);
+	ti = (struct tcpiphdr *)ip;
+	tcp = (tcphdr_t *)&ti->ti_sport;
+	ip->ip_len = sizeof(*ip);
+	ip->ip_hl = sizeof(*ip) >> 2;
+
+	while ((c = getopt(argc, argv, "IP:TUd:f:g:m:o:s:t:")) != -1)
+		switch (c)
+		{
+		case 'I' :
+			if (ip->ip_p)
+			    {
+				fprintf(stderr, "Protocol already set: %d\n",
+					ip->ip_p);
+				break;
+			    }
+			do_icmp(ip, optarg);
+			break;
+		case 'P' :
+		    {
+			struct	protoent	*p;
+
+			if (ip->ip_p)
+			    {
+				fprintf(stderr, "Protocol already set: %d\n",
+					ip->ip_p);
+				break;
+			    }
+			if ((p = getprotobyname(optarg)))
+				ip->ip_p = p->p_proto;
+			else
+				fprintf(stderr, "Unknown protocol: %s\n",
+					optarg);
+			break;
+		    }
+		case 'T' :
+			if (ip->ip_p)
+			    {
+				fprintf(stderr, "Protocol already set: %d\n",
+					ip->ip_p);
+				break;
+			    }
+			ip->ip_p = IPPROTO_TCP;
+			ip->ip_len += sizeof(tcphdr_t);
+			break;
+		case 'U' :
+			if (ip->ip_p)
+			    {
+				fprintf(stderr, "Protocol already set: %d\n",
+					ip->ip_p);
+				break;
+			    }
+			ip->ip_p = IPPROTO_UDP;
+			ip->ip_len += sizeof(udphdr_t);
+			break;
+		case 'd' :
+			dev = optarg;
+			break;
+		case 'f' :
+			ip->ip_off = strtol(optarg, NULL, 0);
+			break;
+		case 'g' :
+			gateway = optarg;
+			break;
+		case 'm' :
+			mtu = atoi(optarg);
+			if (mtu < 28)
+			    {
+				fprintf(stderr, "mtu must be > 28\n");
+				exit(1);
+			    }
+			break;
+		case 'o' :
+			olen = optname(optarg, options);
+			break;
+		case 's' :
+			src = optarg;
+			break;
+		case 't' :
+			if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+				tcp->th_dport = htons(atoi(optarg));
+			break;
+		case 'w' :
+			if (ip->ip_p == IPPROTO_TCP)
+				tcp->th_win = atoi(optarg);
+			else
+				fprintf(stderr, "set protocol to TCP first\n");
+			break;
+		default :
+			fprintf(stderr, "Unknown option \"%c\"\n", c);
+			usage(name);
+		}
+
+	if (argc - optind < 2)
+		usage(name);
+	dst = argv[optind++];
+
+	if (!src)
+	    {
+		gethostname(host, sizeof(host));
+		src = host;
+	    }
+
+	if (resolve(src, (char *)&ip->ip_src) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", src);
+		exit(2);
+	    }
+
+	if (resolve(dst, (char *)&ip->ip_dst) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", dst);
+		exit(2);
+	    }
+
+	if (!gateway)
+		gwip = ip->ip_dst;
+	else if (resolve(gateway, (char *)&gwip) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", gateway);
+		exit(2);
+	    }
+
+	if (ip->ip_p == IPPROTO_TCP)
+		for (s = argv[optind]; (c = *s); s++)
+			switch(c)
+			{
+			case 'S' : case 's' :
+				tcp->th_flags |= TH_SYN;
+				break;
+			case 'A' : case 'a' :
+				tcp->th_flags |= TH_ACK;
+				break;
+			case 'F' : case 'f' :
+				tcp->th_flags |= TH_FIN;
+				break;
+			case 'R' : case 'r' :
+				tcp->th_flags |= TH_RST;
+				break;
+			case 'P' : case 'p' :
+				tcp->th_flags |= TH_PUSH;
+				break;
+			case 'U' : case 'u' :
+				tcp->th_flags |= TH_URG;
+				break;
+			}
+
+	if (!dev)
+		dev = default_device;
+	printf("Device:  %s\n", dev);
+	printf("Source:  %s\n", inet_ntoa(ip->ip_src));
+	printf("Dest:    %s\n", inet_ntoa(ip->ip_dst));
+	printf("Gateway: %s\n", inet_ntoa(gwip));
+	if (ip->ip_p == IPPROTO_TCP && tcp->th_flags)
+		printf("Flags:   %#x\n", tcp->th_flags);
+	printf("mtu:     %d\n", mtu);
+
+	if (olen)
+	    {
+		printf("Options: %d\n", olen);
+		ti = (struct tcpiphdr *)malloc(olen + ip->ip_len);
+		bcopy((char *)ip, (char *)ti, sizeof(*ip));
+		ip = (ip_t *)ti;
+		ip->ip_hl += (olen >> 2);
+		bcopy(options, (char *)(ip + 1), olen);
+		bcopy((char *)tcp, (char *)(ip + 1) + olen, sizeof(*tcp));
+		tcp = (tcphdr_t *)((char *)(ip + 1) + olen);
+		ip->ip_len += olen;
+	    }
+
+#ifdef	DOSOCKET
+	if (tcp->th_dport)
+		return do_socket(dev, mtu, ti, gwip);
+#endif
+	return send_packets(dev, mtu, ti, gwip);
+}
diff --git a/contrib/ipfilter/ipsend/ipsopt.c b/contrib/ipfilter/ipsend/ipsopt.c
new file mode 100644
index 0000000..75c4f16
--- /dev/null
+++ b/contrib/ipfilter/ipsend/ipsopt.c
@@ -0,0 +1,111 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipsopt.c	1.2 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include "ip_compat.h"
+
+struct ipopt_names {
+	int	on_value;
+	int	on_bit;
+	int	on_siz;
+	char	*on_name;
+};
+
+struct ipopt_names ionames[] = {
+	{ IPOPT_EOL,	0x01,	1, "eol" },
+	{ IPOPT_NOP,	0x02,	1, "nop" },
+	{ IPOPT_RR,	0x04,	7, "rr" },	/* 1 route */
+	{ IPOPT_TS,	0x08,	8, "ts" },	/* 1 TS */
+	{ IPOPT_SECURITY, 0x08,	11, "sec-level" },
+	{ IPOPT_LSRR,	0x10,	7, "lsrr" },	/* 1 route */
+	{ IPOPT_SATID,	0x20,	4, "satid" },
+	{ IPOPT_SSRR,	0x40,	7, "ssrr" },	/* 1 route */
+	{ 0, 0, 0, NULL }	/* must be last */
+};
+
+struct	ipopt_names secnames[] = {
+	{ IPOPT_SECUR_UNCLASS,	0x0100,	0, "unclass" },
+	{ IPOPT_SECUR_CONFID,	0x0200,	0, "confid" },
+	{ IPOPT_SECUR_EFTO,	0x0400,	0, "efto" },
+	{ IPOPT_SECUR_MMMM,	0x0800,	0, "mmmm" },
+	{ IPOPT_SECUR_RESTR,	0x1000,	0, "restr" },
+	{ IPOPT_SECUR_SECRET,	0x2000,	0, "secret" },
+	{ IPOPT_SECUR_TOPSECRET, 0x4000,0, "topsecret" },
+	{ 0, 0, 0, NULL }	/* must be last */
+};
+
+
+u_short seclevel(slevel)
+char *slevel;
+{
+	struct ipopt_names *so;
+
+	for (so = secnames; so->on_name; so++)
+		if (!strcasecmp(slevel, so->on_name))
+			break;
+
+	if (!so->on_name) {
+		fprintf(stderr, "no such security level: %s\n", slevel);
+		return 0;
+	}
+	return so->on_value;
+}
+
+
+u_long optname(cp, op)
+char *cp, *op;
+{
+	struct ipopt_names *io;
+	u_short lvl;
+	u_long msk = 0;
+	char *s, *t;
+	int len = 0;
+
+	for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) {
+		if ((t = strchr(s, '=')))
+			*t++ = '\0';
+		for (io = ionames; io->on_name; io++) {
+			if (strcasecmp(s, io->on_name) || (msk & io->on_bit))
+				continue;
+			if ((len + io->on_siz) > 48) {
+				fprintf(stderr, "options too long\n");
+				return 0;
+			}
+			len += io->on_siz;
+			*op++ = io->on_value;
+			if (io->on_siz > 1) {
+				*op++ = io->on_siz;
+				*op++ = IPOPT_MINOFF;
+
+				if (t && !strcasecmp(s, "sec-level")) {
+					lvl = seclevel(t);
+					bcopy(&lvl, op, sizeof(lvl));
+				}
+				op += io->on_siz - 3;
+			}
+			msk |= io->on_bit;
+			break;
+		}
+		if (!io->on_name) {
+			fprintf(stderr, "unknown IP option name %s\n", s);
+			return 0;
+		}
+	}
+	*op++ = IPOPT_EOL;
+	len++;
+	return len;
+}
diff --git a/contrib/ipfilter/ipsend/iptest.c b/contrib/ipfilter/ipsend/iptest.c
new file mode 100644
index 0000000..c5d48fa
--- /dev/null
+++ b/contrib/ipfilter/ipsend/iptest.c
@@ -0,0 +1,211 @@
+/*
+ * ipsend.c (C) 1995 Darren Reed
+ *
+ * This was written to test what size TCP fragments would get through
+ * various TCP/IP packet filters, as used in IP firewalls.  In certain
+ * conditions, enough of the TCP header is missing for unpredictable
+ * results unless the filter is aware that this can happen.
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ *
+ * This was written and tested (successfully) on SunOS 4.1.x.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "%W% %G% (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipt.h"
+
+
+extern	char	*optarg;
+extern	int	optind;
+
+extern	int	initdevice(), resolve();
+extern	int	ip_test1(), ip_test2(), ip_test3(), ip_test4(), ip_test5();
+extern	int	ip_test6(), ip_test7();
+
+char	options[68];
+#ifdef	linux
+char	default_device[] = "eth0";
+#else
+# ifdef	sun
+char	default_device[] = "le0";
+# else
+#  ifdef	ultrix
+char	default_device[] = "ln0";
+#  else
+#   ifdef	__bsdi__
+char	default_device[] = "ef0";
+#   else
+char	default_device[] = "lan0";
+#   endif
+#  endif
+# endif
+#endif
+
+
+void	usage(prog)
+char	*prog;
+{
+	fprintf(stderr, "Usage: %s [options] dest\n\
+\toptions:\n\
+\t\t-d device\tSend out on this device\n\
+\t\t-g gateway\tIP gateway to use if non-local dest.\n\
+\t\t-m mtu\t\tfake MTU to use when sending out\n\
+\t\t-p pointtest\t\n\
+\t\t-s src\t\tsource address for IP packet\n\
+\t\t-1 \t\tPerform test 1 (IP header)\n\
+\t\t-2 \t\tPerform test 2 (IP options)\n\
+\t\t-3 \t\tPerform test 3 (ICMP)\n\
+\t\t-4 \t\tPerform test 4 (UDP)\n\
+\t\t-5 \t\tPerform test 5 (TCP)\n\
+\t\t-6 \t\tPerform test 6 (overlapping fragments)\n\
+\t\t-7 \t\tPerform test 7 (random packets)\n\
+", prog);
+	exit(1);
+}
+
+
+int main(argc, argv)
+int	argc;
+char	**argv;
+{
+	struct	tcpiphdr *ti;
+	struct	in_addr	gwip;
+	ip_t	*ip;
+	char	*name =  argv[0], host[64], *gateway = NULL, *dev = NULL;
+	char	*src = NULL, *dst, c;
+	int	mtu = 1500, tests = 0, pointtest = 0;
+
+	/*
+	 * 65535 is maximum packet size...you never know...
+	 */
+	ip = (ip_t *)calloc(1, 65536);
+	ti = (struct tcpiphdr *)ip;
+	ip->ip_len = sizeof(*ip);
+	ip->ip_hl = sizeof(*ip) >> 2;
+
+	while ((c = getopt(argc, argv, "1234567IP:TUd:f:g:m:o:p:s:t:")) != -1)
+		switch (c)
+		{
+		case '1' :
+		case '2' :
+		case '3' :
+		case '4' :
+		case '5' :
+		case '6' :
+		case '7' :
+			tests = c - '0';
+			break;
+		case 'd' :
+			dev = optarg;
+			break;
+		case 'g' :
+			gateway = optarg;
+			break;
+		case 'm' :
+			mtu = atoi(optarg);
+			if (mtu < 28)
+			    {
+				fprintf(stderr, "mtu must be > 28\n");
+				exit(1);
+			    }
+			break;
+		case 'p' :
+			pointtest = atoi(optarg);
+			break;
+		case 's' :
+			src = optarg;
+			break;
+		default :
+			fprintf(stderr, "Unknown option \"%c\"\n", c);
+			usage(name);
+		}
+
+	if (argc - optind < 2 && !tests)
+		usage(name);
+	dst = argv[optind++];
+
+	if (!src)
+	    {
+		gethostname(host, sizeof(host));
+		src = host;
+	    }
+
+	if (resolve(dst, (char *)&ip->ip_dst) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", dst);
+		exit(2);
+	    }
+
+	if (resolve(src, (char *)&ip->ip_src) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", src);
+		exit(2);
+	    }
+
+	if (!gateway)
+		gwip = ip->ip_dst;
+	else if (resolve(gateway, (char *)&gwip) == -1)
+	    {
+		fprintf(stderr,"Cant resolve %s\n", gateway);
+		exit(2);
+	    }
+
+
+	if (!dev)
+		dev = default_device;
+	printf("Device:  %s\n", dev);
+	printf("Source:  %s\n", inet_ntoa(ip->ip_src));
+	printf("Dest:    %s\n", inet_ntoa(ip->ip_dst));
+	printf("Gateway: %s\n", inet_ntoa(gwip));
+	printf("mtu:     %d\n", mtu);
+
+	switch (tests)
+	{
+	case 1 :
+		return ip_test1(dev, mtu, ti, gwip, pointtest);
+	case 2 :
+		return ip_test2(dev, mtu, ti, gwip, pointtest);
+	case 3 :
+		return ip_test3(dev, mtu, ti, gwip, pointtest);
+	case 4 :
+		return ip_test4(dev, mtu, ti, gwip, pointtest);
+	case 5 :
+		return ip_test5(dev, mtu, ti, gwip, pointtest);
+	case 6 :
+		return ip_test6(dev, mtu, ti, gwip, pointtest);
+	case 7 :
+		return ip_test7(dev, mtu, ti, gwip, pointtest);
+	default :
+		break;
+	}
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/iptests.c b/contrib/ipfilter/ipsend/iptests.c
new file mode 100644
index 0000000..b9da7b2
--- /dev/null
+++ b/contrib/ipfilter/ipsend/iptests.c
@@ -0,0 +1,1296 @@
+/*
+ * (C)opyright 1993, 1994, 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "%W% %G% (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#if !defined(solaris)
+# define _KERNEL
+# define KERNEL
+# include <sys/file.h>
+# undef  _KERNEL
+# undef  KERNEL
+# include <nlist.h>
+# include <sys/user.h>
+# include <sys/proc.h>
+#endif
+#include <kvm.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#ifdef sun
+#include <sys/systm.h>
+#include <sys/session.h>
+#endif
+#if BSD >= 199103
+#include <sys/sysctl.h>
+#include <sys/filedesc.h>
+#include <paths.h>
+#endif
+#include <netinet/in_systm.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/in_pcb.h>
+#include <netinet/tcp_timer.h>
+#include <netinet/tcp_var.h>
+#include "ip_compat.h"
+#ifdef linux
+#include "tcpip.h"
+#else
+#include <netinet/tcpip.h>
+# if defined(__SVR4) || defined(__svr4__)
+#include <sys/sysmacros.h>
+# endif
+#endif
+
+#define	PAUSE()	tv.tv_sec = 0; tv.tv_usec = 10000; \
+		  (void) select(0, NULL, NULL, NULL, &tv)
+
+extern	int	send_ip(), send_tcp(), send_udp(), send_icmp(), send_ether();
+extern	int	initdevice(), kmemcpy();
+extern	u_short	chksum();
+extern	struct	tcpcb	*find_tcp();
+
+void	ip_test1(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	struct	timeval	tv;
+	udphdr_t *u;
+	int	nfd, i, len, id = getpid();
+
+	ip->ip_hl = sizeof(*ip) >> 2;
+	ip->ip_v = IPVERSION;
+	ip->ip_tos = 0;
+	ip->ip_off = 0;
+	ip->ip_ttl = 60;
+	ip->ip_p = IPPROTO_UDP;
+	ip->ip_sum = 0;
+	u = (udphdr_t *)(ip + 1);
+	u->uh_sport = 1;
+	u->uh_dport = 9;
+	u->uh_sum = 0;
+	u->uh_ulen = sizeof(*u) + 4;
+	ip->ip_len = sizeof(*ip) + u->uh_ulen;
+	len = ip->ip_len;
+	nfd = initdevice(dev, u->uh_sport, 1);
+
+	u->uh_sport = htons(u->uh_sport);
+	u->uh_dport = htons(u->uh_dport);
+	u->uh_ulen = htons(u->uh_ulen);
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Part1: hl < len
+		 */
+		ip->ip_id = 0;
+		printf("1.1. sending packets with ip_hl < ip_len\n");
+		for (i = 0; i < ((sizeof(*ip) + u->uh_ulen) >> 2); i++) {
+			ip->ip_hl = i >> 2;
+			(void) send_ip(nfd, 1500, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 2)) {
+		/*
+		 * Part2: hl > len
+		 */
+		ip->ip_id = 0;
+		printf("1.2. sending packets with ip_hl > ip_len\n");
+		for (; i < ((sizeof(*ip) * 2 + u->uh_ulen) >> 2); i++) {
+			ip->ip_hl = i >> 2;
+			(void) send_ip(nfd, 1500, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 3)) {
+		/*
+		 * Part3: v < 4
+		 */
+		ip->ip_id = 0;
+		printf("1.3. ip_v < 4\n");
+		ip->ip_hl = sizeof(*ip) >> 2;
+		for (i = 0; i < 4; i++) {
+			ip->ip_v = i;
+			(void) send_ip(nfd, 1500, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 4)) {
+		/*
+		 * Part4: v > 4
+		 */
+		ip->ip_id = 0;
+		printf("1.4. ip_v > 4\n");
+		for (i = 5; i < 16; i++) {
+			ip->ip_v = i;
+			(void) send_ip(nfd, 1500, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 5)) {
+		/*
+		 * Part5: len < packet
+		 */
+		ip->ip_id = 0;
+		ip->ip_v = IPVERSION;
+		i = ip->ip_len + 1;
+		ip->ip_len = htons(ip->ip_len);
+		ip->ip_off = htons(ip->ip_off);
+		printf("1.5.0 ip_len < packet size (size++, long packets)\n");
+		for (; i < (ntohs(ip->ip_len) * 2); i++) {
+			ip->ip_id = htons(id++);
+			ip->ip_sum = 0;
+			ip->ip_sum = chksum(ip, ip->ip_hl << 2);
+			(void) send_ether(nfd, ip, i, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+		printf("1.5.1 ip_len < packet size (ip_len-, short packets)\n");
+		for (i = len; i > 0; i--) {
+			ip->ip_id = htons(id++);
+			ip->ip_len = htons(i);
+			ip->ip_sum = 0;
+			ip->ip_sum = chksum(ip, ip->ip_hl << 2);
+			(void) send_ether(nfd, ip, len, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 6)) {
+		/*
+		 * Part6: len > packet
+		 */
+		ip->ip_id = 0;
+		printf("1.6.0 ip_len > packet size (increase ip_len)\n");
+		for (i = len + 1; i < (len * 2); i++) {
+			ip->ip_id = htons(id++);
+			ip->ip_len = htons(i);
+			ip->ip_sum = 0;
+			ip->ip_sum = chksum(ip, ip->ip_hl << 2);
+			(void) send_ether(nfd, ip, len, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+		ip->ip_len = htons(len);
+		printf("1.6.1 ip_len > packet size (size--, short packets)\n");
+		for (i = len; i > 0; i--) {
+			ip->ip_id = htons(id++);
+			ip->ip_sum = 0;
+			ip->ip_sum = chksum(ip, ip->ip_hl << 2);
+			(void) send_ether(nfd, ip, i, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 7)) {
+		/*
+		 * Part7: 0 length fragment
+		 */
+		printf("1.7.0 Zero length fragments (ip_off = 0x2000)\n");
+		ip->ip_id = 0;
+		ip->ip_len = sizeof(*ip);
+		ip->ip_off = htons(IP_MF);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("1.7.1 Zero length fragments (ip_off = 0x3000)\n");
+		ip->ip_id = 0;
+		ip->ip_len = sizeof(*ip);
+		ip->ip_off = htons(IP_MF);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("1.7.2 Zero length fragments (ip_off = 0xa000)\n");
+		ip->ip_id = 0;
+		ip->ip_len = sizeof(*ip);
+		ip->ip_off = htons(0xa000);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("1.7.3 Zero length fragments (ip_off = 0x0100)\n");
+		ip->ip_id = 0;
+		ip->ip_len = sizeof(*ip);
+		ip->ip_off = htons(0x0100);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 8)) {
+		struct	timeval	tv;
+
+		gettimeofday(&tv, NULL);
+		srand(tv.tv_sec ^ getpid() ^ tv.tv_usec);
+		/*
+		 * Part8.1: 63k packet + 1k fragment at offset 0x1ffe
+		 * Mark it as being ICMP (so it doesn't get junked), but
+		 * don't bother about the ICMP header, we're not worrying
+		 * about that here.
+		 */
+		ip->ip_p = IPPROTO_ICMP;
+		ip->ip_off = IP_MF;
+		u->uh_dport = htons(9);
+		ip->ip_id = htons(id++);
+		printf("1.8.1 63k packet + 1k fragment at offset 0x1ffe\n");
+		ip->ip_len = 768 + 20 + 8;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		printf("%d\r", i);
+
+		ip->ip_len = MIN(768 + 20, mtu - 68);
+		i = 512;
+		for (; i < (63 * 1024 + 768); i += 768) {
+			ip->ip_off = IP_MF | (i >> 3);
+			(void) send_ip(nfd, mtu, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		ip->ip_len = 896 + 20;
+		ip->ip_off = (i >> 3);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		printf("%d\r", i);
+		putchar('\n');
+		fflush(stdout);
+
+		/*
+		 * Part8.2: 63k packet + 1k fragment at offset 0x1ffe
+		 * Mark it as being ICMP (so it doesn't get junked), but
+		 * don't bother about the ICMP header, we're not worrying
+		 * about that here.  (Lossage here)
+		 */
+		ip->ip_p = IPPROTO_ICMP;
+		ip->ip_off = IP_MF;
+		u->uh_dport = htons(9);
+		ip->ip_id = htons(id++);
+		printf("1.8.2 63k packet + 1k fragment at offset 0x1ffe\n");
+		ip->ip_len = 768 + 20 + 8;
+		if ((rand() & 0x1f) != 0) {
+			(void) send_ip(nfd, mtu, ip, gwip, 1);
+			printf("%d\r", i);
+		} else
+			printf("skip 0\n");
+
+		ip->ip_len = MIN(768 + 20, mtu - 68);
+		i = 512;
+		for (; i < (63 * 1024 + 768); i += 768) {
+			ip->ip_off = IP_MF | (i >> 3);
+			if ((rand() & 0x1f) != 0) {
+				(void) send_ip(nfd, mtu, ip, gwip, 1);
+				printf("%d\r", i);
+			} else
+				printf("skip %d\n", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		ip->ip_len = 896 + 20;
+		ip->ip_off = (i >> 3);
+		if ((rand() & 0x1f) != 0) {
+			(void) send_ip(nfd, mtu, ip, gwip, 1);
+			printf("%d\r", i);
+		} else
+			printf("skip\n");
+		putchar('\n');
+		fflush(stdout);
+
+		/*
+		 * Part8.3: 33k packet - test for not dealing with -ve length
+		 * Mark it as being ICMP (so it doesn't get junked), but
+		 * don't bother about the ICMP header, we're not worrying
+		 * about that here.
+		 */
+		ip->ip_p = IPPROTO_ICMP;
+		ip->ip_off = IP_MF;
+		u->uh_dport = htons(9);
+		ip->ip_id = htons(id++);
+		printf("1.8.3 33k packet\n");
+		ip->ip_len = 768 + 20 + 8;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		printf("%d\r", i);
+
+		ip->ip_len = MIN(768 + 20, mtu - 68);
+		i = 512;
+		for (; i < (32 * 1024 + 768); i += 768) {
+			ip->ip_off = IP_MF | (i >> 3);
+			(void) send_ip(nfd, mtu, ip, gwip, 1);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		ip->ip_len = 896 + 20;
+		ip->ip_off = (i >> 3);
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		printf("%d\r", i);
+		putchar('\n');
+		fflush(stdout);
+	}
+
+	ip->ip_len = len;
+	ip->ip_off = 0;
+	if (!ptest || (ptest == 9)) {
+		/*
+		 * Part9: off & 0x8000 == 0x8000
+		 */
+		ip->ip_id = 0;
+		ip->ip_off = 0x8000;
+		printf("1.9. ip_off & 0x8000 == 0x8000\n");
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	ip->ip_off = 0;
+
+	if (!ptest || (ptest == 10)) {
+		/*
+		 * Part10: ttl = 255
+		 */
+		ip->ip_id = 0;
+		ip->ip_ttl = 255;
+		printf("1.10.0 ip_ttl = 255\n");
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		ip->ip_ttl = 128;
+		printf("1.10.1 ip_ttl = 128\n");
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		ip->ip_ttl = 0;
+		printf("1.10.2 ip_ttl = 0\n");
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	(void) close(nfd);
+}
+
+
+void	ip_test2(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	struct	timeval	tv;
+	int	nfd;
+	u_char	*s;
+
+	s = (u_char *)(ip + 1);
+	nfd = initdevice(dev, 1, 1);
+
+	ip->ip_hl = 6;
+	ip->ip_len = ip->ip_hl << 2;
+	s[IPOPT_OPTVAL] = IPOPT_NOP;
+	s++;
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Test 1: option length > packet length,
+		 *                header length == packet length
+		 */
+		s[IPOPT_OPTVAL] = IPOPT_TS;
+		s[IPOPT_OLEN] = 4;
+		s[IPOPT_OFFSET] = IPOPT_MINOFF;
+		ip->ip_p = IPPROTO_IP;
+		printf("2.1 option length > packet length\n");
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	ip->ip_hl = 7;
+	ip->ip_len = ip->ip_hl << 2;
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Test 2: options have length = 0
+		 */
+		printf("2.2.1 option length = 0, RR\n");
+		s[IPOPT_OPTVAL] = IPOPT_RR;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("2.2.2 option length = 0, TS\n");
+		s[IPOPT_OPTVAL] = IPOPT_TS;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("2.2.3 option length = 0, SECURITY\n");
+		s[IPOPT_OPTVAL] = IPOPT_SECURITY;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("2.2.4 option length = 0, LSRR\n");
+		s[IPOPT_OPTVAL] = IPOPT_LSRR;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("2.2.5 option length = 0, SATID\n");
+		s[IPOPT_OPTVAL] = IPOPT_SATID;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+
+		printf("2.2.6 option length = 0, SSRR\n");
+		s[IPOPT_OPTVAL] = IPOPT_SSRR;
+		s[IPOPT_OLEN] = 0;
+		(void) send_ip(nfd, mtu, ip, gwip, 1);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	(void) close(nfd);
+}
+
+
+/*
+ * test 3 (ICMP)
+ */
+void	ip_test3(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	static	int	ict1[10] = { 8, 9, 10, 13, 14, 15, 16, 17, 18, 0 };
+	static	int	ict2[8] = { 3, 9, 10, 13, 14, 17, 18, 0 };
+	struct	timeval	tv;
+	struct	icmp	*icp;
+	int	nfd, i;
+
+	ip->ip_hl = sizeof(*ip) >> 2;
+	ip->ip_v = IPVERSION;
+	ip->ip_tos = 0;
+	ip->ip_off = 0;
+	ip->ip_ttl = 60;
+	ip->ip_p = IPPROTO_ICMP;
+	ip->ip_sum = 0;
+	ip->ip_len = sizeof(*ip) + sizeof(*icp);
+	icp = (struct icmp *)((char *)ip + (ip->ip_hl << 2));
+	nfd = initdevice(dev, 1, 1);
+
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Type 0 - 31, 255, code = 0
+		 */
+		bzero((char *)icp, sizeof(*icp));
+		for (i = 0; i < 32; i++) {
+			icp->icmp_type = i;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.1.%d ICMP type %d code 0 (all 0's)\r", i, i);
+		}
+		icp->icmp_type = 255;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.1.%d ICMP type %d code 0 (all 0's)\r", i, 255);
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 2)) {
+		/*
+		 * Type 3, code = 0 - 31
+		 */
+		icp->icmp_type = 3;
+		for (i = 0; i < 32; i++) {
+			icp->icmp_code = i;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.2.%d ICMP type 3 code %d (all 0's)\r", i, i);
+		}
+	}
+
+	if (!ptest || (ptest == 3)) {
+		/*
+		 * Type 4, code = 0,127,128,255
+		 */
+		icp->icmp_type = 4;
+		icp->icmp_code = 0;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.3.1 ICMP type 4 code 0 (all 0's)\r");
+		icp->icmp_code = 127;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.3.2 ICMP type 4 code 127 (all 0's)\r");
+		icp->icmp_code = 128;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.3.3 ICMP type 4 code 128 (all 0's)\r");
+		icp->icmp_code = 255;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.3.4 ICMP type 4 code 255 (all 0's)\r");
+	}
+
+	if (!ptest || (ptest == 4)) {
+		/*
+		 * Type 5, code = 0,127,128,255
+		 */
+		icp->icmp_type = 5;
+		icp->icmp_code = 0;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.4.1 ICMP type 5 code 0 (all 0's)\r");
+		icp->icmp_code = 127;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.4.2 ICMP type 5 code 127 (all 0's)\r");
+		icp->icmp_code = 128;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.4.3 ICMP type 5 code 128 (all 0's)\r");
+		icp->icmp_code = 255;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.4.4 ICMP type 5 code 255 (all 0's)\r");
+	}
+
+	if (!ptest || (ptest == 5)) {
+		/*
+		 * Type 8-10;13-18, code - 0,127,128,255
+		 */
+		for (i = 0; ict1[i]; i++) {
+			icp->icmp_type = ict1[i];
+			icp->icmp_code = 0;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type 5 code 0 (all 0's)\r",
+				i * 4);
+			icp->icmp_code = 127;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type 5 code 127 (all 0's)\r",
+				i * 4 + 1);
+			icp->icmp_code = 128;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type 5 code 128 (all 0's)\r",
+				i * 4 + 2);
+			icp->icmp_code = 255;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type 5 code 255 (all 0's)\r",
+				i * 4 + 3);
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 6)) {
+		/*
+		 * Type 12, code - 0,127,128,129,255
+		 */
+		icp->icmp_type = 12;
+		icp->icmp_code = 0;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.6.1 ICMP type 12 code 0 (all 0's)\r");
+		icp->icmp_code = 127;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.6.2 ICMP type 12 code 127 (all 0's)\r");
+		icp->icmp_code = 128;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.6.3 ICMP type 12 code 128 (all 0's)\r");
+		icp->icmp_code = 129;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.6.4 ICMP type 12 code 129 (all 0's)\r");
+		icp->icmp_code = 255;
+		(void) send_icmp(nfd, mtu, ip, gwip);
+		PAUSE();
+		printf("3.6.5 ICMP type 12 code 255 (all 0's)\r");
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 7)) {
+		/*
+		 * Type 3;9-10;13-14;17-18 - shorter packets
+		 */
+		ip->ip_len = sizeof(*ip) + sizeof(*icp) / 2;
+		for (i = 0; ict2[i]; i++) {
+			icp->icmp_type = ict1[i];
+			icp->icmp_code = 0;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type %d code 0 (all 0's)\r",
+				i * 4, icp->icmp_type);
+			icp->icmp_code = 127;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type %d code 127 (all 0's)\r",
+				i * 4 + 1, icp->icmp_type);
+			icp->icmp_code = 128;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type %d code 128 (all 0's)\r",
+				i * 4 + 2, icp->icmp_type);
+			icp->icmp_code = 255;
+			(void) send_icmp(nfd, mtu, ip, gwip);
+			PAUSE();
+			printf("3.5.%d ICMP type %d code 127 (all 0's)\r",
+				i * 4 + 3, icp->icmp_type);
+		}
+		putchar('\n');
+	}
+}
+
+
+/* Perform test 4 (UDP) */
+
+void	ip_test4(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	struct	timeval	tv;
+	struct	udphdr	*u;
+	int	nfd, i;
+
+
+	ip->ip_hl = sizeof(*ip) >> 2;
+	ip->ip_v = IPVERSION;
+	ip->ip_tos = 0;
+	ip->ip_off = 0;
+	ip->ip_ttl = 60;
+	ip->ip_p = IPPROTO_UDP;
+	ip->ip_sum = 0;
+	u = (udphdr_t *)((char *)ip + (ip->ip_hl << 2));
+	u->uh_sport = 1;
+	u->uh_dport = 1;
+	u->uh_ulen = sizeof(*u) + 4;
+	nfd = initdevice(dev, u->uh_sport, 1);
+
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Test 1. ulen > packet
+		 */
+		u->uh_ulen = sizeof(*u) + 4;
+		ip->ip_len = (ip->ip_hl << 2) + u->uh_ulen;
+		printf("4.1 UDP uh_ulen > packet size - short packets\n");
+		for (i = u->uh_ulen * 2; i > sizeof(*u) + 4; i--) {
+			u->uh_ulen = i;
+			(void) send_udp(nfd, 1500, ip, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 2)) {
+		/*
+		 * Test 2. ulen < packet
+		 */
+		u->uh_ulen = sizeof(*u) + 4;
+		ip->ip_len = (ip->ip_hl << 2) + u->uh_ulen;
+		printf("4.2 UDP uh_ulen < packet size - short packets\n");
+		for (i = u->uh_ulen * 2; i > sizeof(*u) + 4; i--) {
+			ip->ip_len = i;
+			(void) send_udp(nfd, 1500, ip, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 3)) {
+		/*
+		 * Test 3: sport = 0, sport = 1, sport = 32767
+		 *         sport = 32768, sport = 65535
+		 */
+		u->uh_ulen = sizeof(*u) + 4;
+		ip->ip_len = (ip->ip_hl << 2) + u->uh_ulen;
+		printf("4.3.1 UDP sport = 0\n");
+		u->uh_sport = 0;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("0\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.3.2 UDP sport = 1\n");
+		u->uh_sport = 1;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("1\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.3.3 UDP sport = 32767\n");
+		u->uh_sport = 32767;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("32767\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.3.4 UDP sport = 32768\n");
+		u->uh_sport = 32768;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("32768\n");
+		putchar('\n');
+		fflush(stdout);
+		PAUSE();
+		printf("4.3.5 UDP sport = 65535\n");
+		u->uh_sport = 65535;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("65535\n");
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 4)) {
+		/*
+		 * Test 4: dport = 0, dport = 1, dport = 32767
+		 *         dport = 32768, dport = 65535
+		 */
+		u->uh_ulen = sizeof(*u) + 4;
+		u->uh_sport = 1;
+		ip->ip_len = (ip->ip_hl << 2) + u->uh_ulen;
+		printf("4.4.1 UDP dport = 0\n");
+		u->uh_dport = 0;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("0\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.4.2 UDP dport = 1\n");
+		u->uh_dport = 1;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("1\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.4.3 UDP dport = 32767\n");
+		u->uh_dport = 32767;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("32767\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.4.4 UDP dport = 32768\n");
+		u->uh_dport = 32768;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("32768\n");
+		fflush(stdout);
+		PAUSE();
+		printf("4.4.5 UDP dport = 65535\n");
+		u->uh_dport = 65535;
+		(void) send_udp(nfd, 1500, ip, gwip);
+		printf("65535\n");
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 4)) {
+		/*
+		 * Test 5: sizeof(struct ip) <= MTU <= sizeof(struct udphdr) +
+		 * sizeof(struct ip)
+		 */
+		printf("4.5 UDP 20 <= MTU <= 32\n");
+		for (i = sizeof(*ip); i <= u->uh_ulen; i++) {
+			(void) send_udp(nfd, i, ip, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+}
+
+
+/* Perform test 5 (TCP) */
+
+void	ip_test5(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	struct	timeval	tv;
+	tcphdr_t *t;
+	int	nfd, i;
+
+	t = (tcphdr_t *)((char *)ip + (ip->ip_hl << 2));
+	t->th_x2 = 0;
+	t->th_off = 0;
+	t->th_sport = 1;
+	t->th_dport = 1;
+	t->th_win = 4096;
+	t->th_urp = 0;
+	t->th_sum = 0;
+	t->th_seq = 1;
+	t->th_ack = 0;
+	nfd = initdevice(dev, t->th_sport, 1);
+
+	if (!ptest || (ptest == 1)) {
+		/*
+		 * Test 1: flags variations, 0 - 3f
+		 */
+		t->th_off = sizeof(*t) >> 2;
+		printf("5.1 Test TCP flag combinations\n");
+		for (i = 0; i <= (TH_URG|TH_ACK|TH_PUSH|TH_RST|TH_SYN|TH_FIN);
+		     i++) {
+			t->th_flags = i;
+			(void) send_tcp(nfd, mtu, ip, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	if (!ptest || (ptest == 2)) {
+		t->th_flags = TH_SYN;
+		/*
+		 * Test 2: seq = 0, seq = 1, seq = 0x7fffffff, seq=0x80000000,
+		 *         seq = 0xa000000, seq = 0xffffffff
+		 */
+		printf("5.2.1 TCP seq = 0\n");
+		t->th_seq = 0;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.2.2 TCP seq = 1\n");
+		t->th_seq = 1;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.2.3 TCP seq = 0x7fffffff\n");
+		t->th_seq = 0x7fffffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.2.4 TCP seq = 0x80000000\n");
+		t->th_seq = 0x80000000;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.2.5 TCP seq = 0xc0000000\n");
+		t->th_seq = 0xc0000000;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.2.6 TCP seq = 0xffffffff\n");
+		t->th_seq = 0xffffffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 3)) {
+		t->th_flags = TH_ACK;
+		/*
+		 * Test 3: ack = 0, ack = 1, ack = 0x7fffffff, ack = 0x8000000
+		 *         ack = 0xa000000, ack = 0xffffffff
+		 */
+		printf("5.3.1 TCP ack = 0\n");
+		t->th_ack = 0;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.3.2 TCP ack = 1\n");
+		t->th_ack = 1;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.3.3 TCP ack = 0x7fffffff\n");
+		t->th_ack = 0x7fffffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.3.4 TCP ack = 0x80000000\n");
+		t->th_ack = 0x80000000;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.3.5 TCP ack = 0xc0000000\n");
+		t->th_ack = 0xc0000000;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.3.6 TCP ack = 0xffffffff\n");
+		t->th_ack = 0xffffffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 4)) {
+		t->th_flags = TH_SYN;
+		/*
+		 * Test 4: win = 0, win = 32768, win = 65535
+		 */
+		printf("5.4.1 TCP win = 0\n");
+		t->th_seq = 0;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.4.2 TCP win = 32768\n");
+		t->th_seq = 0x7fff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.4.3 TCP win = 65535\n");
+		t->th_win = 0xffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+	}
+
+#if !defined(linux) && !defined(__SVR4) && !defined(__svr4__)
+	{
+	struct tcpcb *t, tcb;
+	struct tcpiphdr ti;
+	struct sockaddr_in sin;
+	int fd, slen;
+
+	bzero((char *)&sin, sizeof(sin));
+
+	for (i = 1; i < 63; i++) {
+		fd = socket(AF_INET, SOCK_STREAM, 0);
+		sin.sin_addr.s_addr = ip->ip_dst.s_addr;
+		sin.sin_port = htons(i);
+		if (!connect(fd, (struct sockaddr *)&sin, sizeof(sin)))
+			break;
+	}
+
+	if (i == 63) {
+		printf("Couldn't open a TCP socket between ports 1 and 63\n");
+		printf("to host %s for test 5 and 6 - skipping.\n",
+			inet_ntoa(ip->ip_dst));
+		goto skip_five_and_six;
+	}
+
+	bcopy((char *)ip, (char *)&ti, sizeof(*ip));
+	ti.ti_dport = i;
+	slen = sizeof(sin);
+	if (!getsockname(fd, (struct sockaddr *)&sin, &slen))
+		ti.ti_sport = sin.sin_port;
+	if (!(t = find_tcp(fd, &ti))) {
+		printf("Can't find PCB\n");
+		goto skip_five_and_six;
+	}
+	kmemcpy((char*)&tcb, (void *)t, sizeof(tcb));
+	ti.ti_win = tcb.rcv_adv;
+	ti.ti_seq = tcb.snd_nxt - 1;
+	ti.ti_ack = tcb.rcv_nxt;
+
+	if (!ptest || (ptest == 5)) {
+		/*
+		 * Test 5: urp
+		 */
+		printf("5.1 TCP Urgent pointer\n");
+		ti.ti_urp = 1;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		PAUSE();
+		ti.ti_urp = 0x7fff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		PAUSE();
+		ti.ti_urp = 0x8000;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		PAUSE();
+		ti.ti_urp = 0xffff;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 6)) {
+		/*
+		 * Test 6: data offset, off = 0, off is inside, off is outside
+		 */
+		printf("6.1 TCP off = 0-15, len = 40\n");
+		for (i = 0; i < 16; i++) {
+			ti.ti_off = ntohs(i);
+			(void) send_tcp(nfd, mtu, ip, gwip);
+			printf("%d\r", i);
+			fflush(stdout);
+			PAUSE();
+		}
+		putchar('\n');
+	}
+
+	(void) close(fd);
+	}
+skip_five_and_six:
+#endif
+	t->th_seq = 1;
+	t->th_ack = 1;
+
+	if (!ptest || (ptest == 7)) {
+		t->th_off = 0;
+		t->th_flags = TH_SYN;
+		/*
+		 * Test 7: sport = 0, sport = 1, sport = 32767
+		 *         sport = 32768, sport = 65535
+		 */
+		printf("5.7.1 TCP sport = 0\n");
+		t->th_sport = 0;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.7.2 TCP sport = 1\n");
+		t->th_sport = 1;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.7.3 TCP sport = 32767\n");
+		t->th_sport = 32767;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.7.4 TCP sport = 32768\n");
+		t->th_sport = 32768;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.7.5 TCP sport = 65535\n");
+		t->th_sport = 65535;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+	}
+
+	if (!ptest || (ptest == 8)) {
+		t->th_sport = 1;
+		/*
+		 * Test 8: dport = 0, dport = 1, dport = 32767
+		 *         dport = 32768, dport = 65535
+		 */
+		printf("5.8.1 TCP dport = 0\n");
+		t->th_dport = 0;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.8.2 TCP dport = 1\n");
+		t->th_dport = 1;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.8.3 TCP dport = 32767\n");
+		t->th_dport = 32767;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.8.4 TCP dport = 32768\n");
+		t->th_dport = 32768;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+
+		printf("5.8.5 TCP dport = 65535\n");
+		t->th_dport = 65535;
+		(void) send_tcp(nfd, mtu, ip, gwip);
+		fflush(stdout);
+		PAUSE();
+	}
+	/* TCP options header checking */
+	/* 0 length options, etc */
+}
+
+
+/* Perform test 6 (exhaust mbuf test) */
+
+void	ip_test6(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	struct	timeval	tv;
+	udphdr_t *u;
+	int	nfd, i, j, k;
+
+	ip->ip_v = IPVERSION;
+	ip->ip_tos = 0;
+	ip->ip_off = 0;
+	ip->ip_ttl = 60;
+	ip->ip_p = IPPROTO_UDP;
+	ip->ip_sum = 0;
+	u = (udphdr_t *)(ip + 1);
+	u->uh_sport = 1;
+	u->uh_dport = 9;
+	u->uh_sum = 0;
+
+	nfd = initdevice(dev, u->uh_sport, 1);
+	u->uh_sport = htons(u->uh_sport);
+	u->uh_dport = htons(u->uh_dport);
+	u->uh_ulen = 7168;
+
+	for (i = 0; i < 128; i++) {
+		/*
+		 * First send the entire packet in 768 byte chunks.
+		 */
+		ip->ip_len = sizeof(*ip) + 768 + sizeof(*u);
+		ip->ip_hl = sizeof(*ip) >> 2;
+		ip->ip_off = IP_MF;
+		(void) send_ip(nfd, 1500, ip, gwip, 1);
+		printf("%d %d\r", i, 0);
+		fflush(stdout);
+		PAUSE();
+		/*
+		 * And again using 128 byte chunks.
+		 */
+		ip->ip_len = sizeof(*ip) + 128 + sizeof(*u);
+		ip->ip_off = IP_MF;
+		(void) send_ip(nfd, 1500, ip, gwip, 1);
+		printf("%d %d\r", i, 0);
+		fflush(stdout);
+		PAUSE();
+
+		for (j = 768; j < 3584; j += 768) {
+			ip->ip_len = sizeof(*ip) + 768;
+			ip->ip_off = IP_MF|(j>>3);
+			(void) send_ip(nfd, 1500, ip, gwip, 1);
+			printf("%d %d\r", i, j);
+			fflush(stdout);
+			PAUSE();
+
+			ip->ip_len = sizeof(*ip) + 128;
+			for (k = j - 768; k < j; k += 128) {
+				ip->ip_off = IP_MF|(k>>3);
+				(void) send_ip(nfd, 1500, ip, gwip, 1);
+				printf("%d %d\r", i, k);
+				fflush(stdout);
+				PAUSE();
+			}
+		}
+	}
+	putchar('\n');
+}
+
+
+/* Perform test 7 (random packets) */
+
+static	u_long	tbuf[64];
+
+void	ip_test7(dev, mtu, ip, gwip, ptest)
+char	*dev;
+int	mtu;
+ip_t	*ip;
+struct	in_addr	gwip;
+int	ptest;
+{
+	ip_t	*pip;
+	struct	timeval	tv;
+	int	nfd, i, j;
+	u_char	*s;
+
+	nfd = initdevice(dev, 0, 1);
+	pip = (ip_t *)tbuf;
+
+	srand(time(NULL) ^ (getpid() * getppid()));
+
+	printf("7. send 1024 random IP packets.\n");
+
+	for (i = 0; i < 512; i++) {
+		for (s = (u_char *)pip, j = 0; j < sizeof(tbuf); j++, s++)
+			*s = (rand() >> 13) & 0xff;
+		pip->ip_v = IPVERSION;
+		bcopy((char *)&ip->ip_dst, (char *)&pip->ip_dst,
+		      sizeof(struct in_addr));
+		pip->ip_sum = 0;
+		pip->ip_len &= 0xff;
+		(void) send_ip(nfd, mtu, pip, gwip, 0);
+		printf("%d\r", i);
+		fflush(stdout);
+		PAUSE();
+	}
+	putchar('\n');
+
+	for (i = 0; i < 512; i++) {
+		for (s = (u_char *)pip, j = 0; j < sizeof(tbuf); j++, s++)
+			*s = (rand() >> 13) & 0xff;
+		pip->ip_v = IPVERSION;
+		pip->ip_off &= 0xc000;
+		bcopy((char *)&ip->ip_dst, (char *)&pip->ip_dst,
+		      sizeof(struct in_addr));
+		pip->ip_sum = 0;
+		pip->ip_len &= 0xff;
+		(void) send_ip(nfd, mtu, pip, gwip, 0);
+		printf("%d\r", i);
+		fflush(stdout);
+		PAUSE();
+	}
+	putchar('\n');
+}
diff --git a/contrib/ipfilter/ipsend/larp.c b/contrib/ipfilter/ipsend/larp.c
new file mode 100644
index 0000000..1eb4b2f
--- /dev/null
+++ b/contrib/ipfilter/ipsend/larp.c
@@ -0,0 +1,85 @@
+/*
+ * larp.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)larp.c	1.1 8/19/95 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+
+/*
+ * lookup host and return
+ * its IP address in address
+ * (4 bytes)
+ */
+int	resolve(host, address) 
+char	*host, *address;
+{
+        struct	hostent	*hp;
+        u_long	add;
+
+	add = inet_addr(host);
+	if (add == -1)
+	    {
+		if (!(hp = gethostbyname(host)))
+		    {
+			fprintf(stderr, "unknown host: %s\n", host);
+			return -1;
+		    }
+		bcopy((char *)hp->h_addr, (char *)address, 4);
+		return 0;
+	}
+	bcopy((char*)&add, address, 4);
+	return 0;
+}
+
+/*
+ * ARP for the MAC address corresponding
+ * to the IP address.  This taken from
+ * some BSD program, I cant remember which.
+ */
+int	arp(ip, ether)
+char	*ip;
+char	*ether;
+{
+	static	int	s = -1;
+	struct	arpreq	ar;
+	struct	sockaddr_in	*sin;
+	char	*inet_ntoa();
+
+	bzero((char *)&ar, sizeof(ar));
+	sin = (struct sockaddr_in *)&ar.arp_pa;
+	sin->sin_family = AF_INET;
+	bcopy(ip, (char *)&sin->sin_addr.s_addr, 4);
+
+	if (s == -1)
+		if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
+		    {
+			perror("arp: socket");
+			return -1;
+		    }
+
+	if (ioctl(s, SIOCGARP, (caddr_t)&ar) == -1)
+	    {
+		fprintf(stderr, "(%s):", inet_ntoa(sin->sin_addr));
+		if (errno != ENXIO)
+			perror("SIOCGARP");
+		return -1;
+	    }
+
+	bcopy(ar.arp_ha.sa_data, ether, 6);
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/linux.h b/contrib/ipfilter/ipsend/linux.h
new file mode 100644
index 0000000..7eb382b
--- /dev/null
+++ b/contrib/ipfilter/ipsend/linux.h
@@ -0,0 +1,17 @@
+/*
+ * (C)opyright 1995 by Darren Reed.
+ *
+ * This code may be freely distributed as long as it retains this notice
+ * and is not changed in any way.  The author accepts no responsibility
+ * for the use of this software.  I hate legaleese, don't you ?
+ *
+ * @(#)linux.h	1.1 8/19/95
+ */
+
+#include <linux/config.h>
+#ifdef MODULE
+#include <linux/module.h>
+#include <linux/version.h>
+#endif /* MODULE */
+
+#include "ip_compat.h"
diff --git a/contrib/ipfilter/ipsend/lsock.c b/contrib/ipfilter/ipsend/lsock.c
new file mode 100644
index 0000000..89b6ab7
--- /dev/null
+++ b/contrib/ipfilter/ipsend/lsock.c
@@ -0,0 +1,261 @@
+/*
+ * lsock.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)lsock.c	1.2 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/dir.h>
+#define	__KERNEL__
+#if LINUX >= 0200
+# undef UINT_MAX
+# undef INT_MAX
+# undef ULONG_MAX
+# undef LONG_MAX
+# include <linux/notifier.h>
+#endif
+#include <linux/fs.h>
+#if LINUX >= 0200
+#include "linux/netdevice.h"
+#include "net/sock.h"
+#endif
+#undef	__KERNEL__
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <nlist.h>
+#include <sys/user.h>
+#include <sys/socket.h>
+#include <math.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <net/if.h>
+#if LINUX < 0103
+#include <net/inet/sock.h>
+#endif
+#include "ip_compat.h"
+#include "tcpip.h"
+
+int	nproc;
+struct	task_struct	*proc;
+
+#ifndef	KMEM
+# ifdef	_PATH_KMEM
+#  define	KMEM	_PATH_KMEM
+# endif
+#endif
+#ifndef	KMEM
+# define	KMEM	"/dev/kmem"
+#endif
+#ifndef	KERNEL
+# define	KERNEL	"/System.map"
+#endif
+
+int	kmemcpy(buf, pos, n)
+char	*buf;
+void	*pos;
+int	n;
+{
+	static	int	kfd = -1;
+
+	if (kfd == -1)
+		kfd = open(KMEM, O_RDONLY);
+
+	if (lseek(kfd, (off_t)pos, SEEK_SET) == -1)
+	    {
+		perror("lseek");
+		return -1;
+	    }
+	if (read(kfd, buf, n) == -1)
+	    {
+		perror("read");
+		return -1;
+	    }
+	return n;
+}
+
+struct	nlist	names[3] = {
+	{ "_task" },
+	{ "_nr_tasks" },
+	{ NULL }
+	};
+
+struct	task_struct	*getproc()
+{
+	struct	task_struct	*p, **pp;
+	void	*v;
+	pid_t	pid = getpid();
+	int	siz, n;
+
+	n = nlist(KERNEL, names);
+	if (n != 0)
+	    {
+		fprintf(stderr, "nlist(%#x) == %d\n", names, n);
+		return NULL;
+	    }
+	if (kmemcpy((char *)&nproc, (void *)names[1].n_value,
+		    sizeof(nproc)) == -1)
+	    {
+		fprintf(stderr, "read nproc (%#x)\n", names[1].n_value);
+		return NULL;
+	    }
+	siz = nproc * sizeof(struct task_struct *);
+	if (kmemcpy((char *)&v, (void *)names[0].n_value, sizeof(v)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			names[0].n_value, &v, sizeof(v));
+		return NULL;
+	    }
+	pp = (struct task_struct **)malloc(siz);
+	if (kmemcpy((char *)pp, (void *)v, siz) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			v, pp, siz);
+		return NULL;
+	    }
+	proc = (struct task_struct *)malloc(siz);
+	for (n = 0; n < NR_TASKS; n++)
+	    {
+		if (kmemcpy((char *)(proc + n), (void *)pp[n],
+			    sizeof(*proc)) == -1)
+		    {
+			fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+				pp[n], proc + n, sizeof(*proc));
+			return NULL;
+		    }
+	    }
+
+	p = proc;
+
+	for (n = NR_TASKS; n; n--, p++)
+		if (p->pid == pid)
+			break;
+	if (!n)
+		return NULL;
+
+	return p;
+}
+
+
+struct	sock	*find_tcp(fd, ti)
+int	fd;
+struct	tcpiphdr *ti;
+{
+	struct	sock	*s;
+	struct	inode	*i;
+	struct	files_struct	*fs;
+	struct	task_struct	*p;
+	struct	file	*f, **o;
+
+	if (!(p = getproc()))
+		return NULL;
+
+	fs = p->files;
+	o = (struct file **)calloc(1, sizeof(*o) * (fs->count + 1));
+	if (kmemcpy((char *)o, (void *)fs->fd,
+		    (fs->count + 1) * sizeof(*o)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - fd - failed\n",
+			fs->fd, o, sizeof(*o));
+		return NULL;
+	    }
+	f = (struct file *)calloc(1, sizeof(*f));
+	if (kmemcpy((char *)f, (void *)o[fd], sizeof(*f)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - o[fd] - failed\n",
+			o[fd], f, sizeof(*f));
+		return NULL;
+	    }
+
+	i = (struct inode *)calloc(1, sizeof(*i));
+	if (kmemcpy((char *)i, (void *)f->f_inode, sizeof(*i)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - f_inode - failed\n",
+			f->f_inode, i, sizeof(*i));
+		return NULL;
+	    }
+	return i->u.socket_i.data;
+}
+
+int	do_socket(dev, mtu, ti, gwip, flags)
+char	*dev;
+int	mtu;
+struct	tcpiphdr *ti;
+struct	in_addr	gwip;
+int	flags;
+{
+	struct	sockaddr_in	rsin, lsin;
+	struct	sock	*s, sk;
+	int	fd, nfd, len;
+
+	printf("Dest. Port: %d\n", ti->ti_dport);
+
+	fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (fd == -1)
+	    {
+		perror("socket");
+		return -1;
+	    }
+
+	if (fcntl(fd, F_SETFL, FNDELAY) == -1)
+	    {
+		perror("fcntl");
+		return -1;
+	    }
+
+	bzero((char *)&lsin, sizeof(lsin));
+	lsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr,
+	      sizeof(struct in_addr));
+	if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1)
+	    {
+		perror("bind");
+		return -1;
+	    }
+	len = sizeof(lsin);
+	(void) getsockname(fd, (struct sockaddr *)&lsin, &len);
+	ti->ti_sport = lsin.sin_port;
+	printf("sport %d\n", ntohs(lsin.sin_port));
+	nfd = initdevice(dev, ntohs(lsin.sin_port));
+
+	if (!(s = find_tcp(fd, ti)))
+		return -1;
+
+	bzero((char *)&rsin, sizeof(rsin));
+	rsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr,
+	      sizeof(struct in_addr));
+	rsin.sin_port = ti->ti_dport;
+	if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 &&
+	    errno != EINPROGRESS)
+	    {
+		perror("connect");
+		return -1;
+	    }
+	kmemcpy((char*)&sk, (void *)s, sizeof(sk));
+	ti->ti_win = sk.window;
+	ti->ti_seq = sk.sent_seq - 1;
+	ti->ti_ack = sk.rcv_ack_seq;
+
+	if (send_tcp(nfd, mtu, ti, gwip, TH_SYN) == -1)
+		return -1;
+	(void)write(fd, "Hello World\n", 12);
+	sleep(2);
+	close(fd);
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/resend.c b/contrib/ipfilter/ipsend/resend.c
new file mode 100644
index 0000000..59ed75e
--- /dev/null
+++ b/contrib/ipfilter/ipsend/resend.c
@@ -0,0 +1,130 @@
+/*
+ * resend.c (C) 1995 Darren Reed
+ *
+ * This was written to test what size TCP fragments would get through
+ * various TCP/IP packet filters, as used in IP firewalls.  In certain
+ * conditions, enough of the TCP header is missing for unpredictable
+ * results unless the filter is aware that this can happen.
+ *
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)resend.c	1.3 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#ifndef	linux
+#include <netinet/ip_var.h>
+#include <netinet/tcpip.h>
+#include <netinet/if_ether.h>
+#endif
+#include "ip_compat.h"
+#ifdef	linux
+#include <linux/sockios.h>
+#include "tcpip.h"
+#endif
+#include "ipt.h"
+
+
+static	u_char	buf[65536];	/* 1 big packet */
+
+extern	int	initdevice(), arp(), sendip();
+
+void printpacket(ip)
+ip_t	*ip;
+{
+	tcphdr_t *t;
+	int i, j;
+
+	t = (tcphdr_t *)((char *)ip + (ip->ip_hl << 2));
+	if (ip->ip_tos)
+		printf("tos %#x ", ip->ip_tos);
+	if (ip->ip_off & 0x3fff)
+		printf("frag @%#x ", (ip->ip_off & 0x1fff) << 3);
+	printf("len %d id %d ", ip->ip_len, ip->ip_id);
+	printf("ttl %d p %d src %s", ip->ip_ttl, ip->ip_p,
+		inet_ntoa(ip->ip_src));
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		printf(",%d", t->th_sport);
+	printf(" dst %s", inet_ntoa(ip->ip_dst));
+	if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+		printf(",%d", t->th_dport);
+	if (ip->ip_p == IPPROTO_TCP) {
+		printf(" seq %lu:%lu flags ",
+			(u_long)t->th_seq, (u_long)t->th_ack);
+		for (j = 0, i = 1; i < 256; i *= 2, j++)
+			if (t->th_flags & i)
+				printf("%c", "FSRPAU--"[j]);
+	}
+	putchar('\n');
+}
+
+
+int	ip_resend(dev, mtu, r, gwip, datain)
+char	*dev;
+int	mtu;
+struct	in_addr	gwip;
+struct	ipread	*r;
+char	*datain;
+{
+	ether_header_t	*eh;
+	char	dhost[6];
+	ip_t	*ip;
+	int	fd, wfd = initdevice(dev, 0, 5), len, i;
+
+	if (datain)
+		fd = (*r->r_open)(datain);
+	else
+		fd = (*r->r_open)("-");
+ 
+	if (fd < 0)
+		exit(-1);
+
+	ip = (struct ip *)buf;
+	eh = (ether_header_t *)malloc(sizeof(*eh));
+
+	bzero(&eh->ether_shost, sizeof(eh->ether_shost));
+	if (gwip.s_addr && (arp((char *)&gwip, dhost) == -1))
+	    {
+		perror("arp");
+		return -2;
+	    }
+
+	while ((i = (*r->r_readip)(buf, sizeof(buf), NULL, NULL)) > 0)
+	    {
+		len = ntohs(ip->ip_len);
+		eh = (ether_header_t *)realloc((char *)eh, sizeof(*eh) + len);
+		eh->ether_type = htons((u_short)ETHERTYPE_IP);
+		if (!gwip.s_addr) {
+			if (arp((char *)&gwip,
+				(char *)&eh->ether_dhost) == -1) {
+				perror("arp");
+				continue;
+			}
+		} else
+			bcopy(dhost, (char *)&eh->ether_dhost, sizeof(dhost));
+		bcopy(ip, (char *)(eh + 1), len);
+		printpacket(ip);
+
+		if (sendip(wfd, eh, sizeof(*eh) + len) == -1)
+		    {
+			perror("send_packet");
+			break;
+		    }
+	    }
+	(*r->r_close)();
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/sbpf.c b/contrib/ipfilter/ipsend/sbpf.c
new file mode 100644
index 0000000..5eb9d9b
--- /dev/null
+++ b/contrib/ipfilter/ipsend/sbpf.c
@@ -0,0 +1,136 @@
+/*
+ * (C)opyright October 1995 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mbuf.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#if BSD < 199103
+#include <sys/fcntlcom.h>
+#endif
+#include <sys/dir.h>
+#include <net/bpf.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sbpf[] = "@(#)sbpf.c	1.3 8/25/95 (C)1995 Darren Reed";
+#endif
+
+/*
+ * the code herein is dervied from libpcap.
+ */
+static	u_char	*buf = NULL;
+static	int	bufsize = 0, timeout = 1;
+
+
+int	initdevice(device, sport, tout)
+char	*device;
+int	sport, tout;
+{
+	struct	bpf_version bv;
+	struct	timeval to;
+	struct	ifreq ifr;
+	char	bpfname[16];
+	int	fd, i;
+
+	for (i = 0; i < 16; i++)
+	    {
+		(void) sprintf(bpfname, "/dev/bpf%d", i);
+		if ((fd = open(bpfname, O_RDWR)) >= 0)
+			break;
+	    }
+	if (i == 16)
+	    {
+		fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
+		return -1;
+	    }
+
+	if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
+	    {
+		perror("BIOCVERSION");
+		return -1;
+	    }
+	if (bv.bv_major != BPF_MAJOR_VERSION ||
+	    bv.bv_minor < BPF_MINOR_VERSION)
+	    {
+		fprintf(stderr, "kernel bpf (v%d.%d) filter out of date:\n",
+			bv.bv_major, bv.bv_minor);
+		fprintf(stderr, "current version: %d.%d\n",
+			BPF_MAJOR_VERSION, BPF_MINOR_VERSION);
+		return -1;
+	    }
+
+	(void) strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+	if (ioctl(fd, BIOCSETIF, &ifr) == -1)
+	    {
+		fprintf(stderr, "%s(%d):", ifr.ifr_name, fd);
+		perror("BIOCSETIF");
+		exit(1);
+	    }
+	/*
+	 * get kernel buffer size
+	 */
+	if (ioctl(fd, BIOCGBLEN, &bufsize) == -1)
+	    {
+		perror("BIOCSBLEN");
+		exit(-1);
+	    }
+	buf = (u_char*)malloc(bufsize);
+	/*
+	 * set the timeout
+	 */
+	timeout = tout;
+	to.tv_sec = 1;
+	to.tv_usec = 0;
+	if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&to) == -1)
+	    {
+		perror("BIOCSRTIMEOUT");
+		exit(-1);
+	    }
+
+	(void) ioctl(fd, BIOCFLUSH, 0);
+	return fd;
+}
+
+
+/*
+ * output an IP packet onto a fd opened for /dev/bpf
+ */
+int	sendip(fd, pkt, len)
+int	fd, len;
+char	*pkt;
+{			
+	if (write(fd, pkt, len) == -1)
+	    {
+		perror("send");
+		return -1;
+	    }
+
+	return len;
+}
diff --git a/contrib/ipfilter/ipsend/sdlpi.c b/contrib/ipfilter/ipsend/sdlpi.c
new file mode 100644
index 0000000..eabd61e
--- /dev/null
+++ b/contrib/ipfilter/ipsend/sdlpi.c
@@ -0,0 +1,130 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/stropts.h>
+
+#include <sys/pfmod.h>
+#include <sys/bufmod.h>
+#include <sys/dlpi.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#include "ip_compat.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	snitid[] = "@(#)sdlpi.c	1.3 10/30/95 (C)1995 Darren Reed";
+#endif
+
+#define	CHUNKSIZE	8192
+#define BUFSPACE	(4*CHUNKSIZE)
+
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+int	initdevice(device, sport, tout)
+char	*device;
+int	sport, tout;
+{
+	char	devname[16], *s, buf[256];
+	int	i, fd;
+
+	(void) sprintf(devname, "/dev/%s", device);
+
+	s = devname + 5;
+	while (*s && !isdigit(*s))
+		s++;
+	if (!*s)
+	    {
+		fprintf(stderr, "bad device name %s\n", devname);
+		exit(-1);
+	    }
+	i = atoi(s);
+	*s = '\0';
+	/*
+	 * For writing
+	 */
+	if ((fd = open(devname, O_RDWR)) < 0)
+	    {
+		fprintf(stderr, "O_RDWR(1) ");
+		perror(devname);
+		exit(-1);
+	    }
+
+	if (dlattachreq(fd, i) == -1 || dlokack(fd, buf) == -1)
+	    {
+		fprintf(stderr, "DLPI error\n");
+		exit(-1);
+	    }
+	dlbindreq(fd, ETHERTYPE_IP, 0, DL_CLDLS, 0, 0);
+	dlbindack(fd, buf);
+	/*
+	 * write full headers
+	 */
+	if (strioctl(fd, DLIOCRAW, -1, 0, NULL) == -1)
+	    {
+		fprintf(stderr, "DLIOCRAW error\n");
+		exit(-1);
+	    }
+	return fd;
+}
+
+
+/*
+ * output an IP packet onto a fd opened for /dev/nit
+ */
+int	sendip(fd, pkt, len)
+int	fd, len;
+char	*pkt;
+{			
+	struct	strbuf	dbuf, *dp = &dbuf;
+
+	/*
+	 * construct NIT STREAMS messages, first control then data.
+	 */
+	dp->buf = pkt;
+	dp->len = len;
+	dp->maxlen = dp->len;
+
+	if (putmsg(fd, NULL, dp, 0) == -1)
+	    {
+		perror("putmsg");
+		return -1;
+	    }
+	if (ioctl(fd, I_FLUSH, FLUSHW) == -1)
+	    {
+		perror("I_FLUSHW");
+		return -1;
+	    }
+	return len;
+}
diff --git a/contrib/ipfilter/ipsend/slinux.c b/contrib/ipfilter/ipsend/slinux.c
new file mode 100644
index 0000000..1767dfe
--- /dev/null
+++ b/contrib/ipfilter/ipsend/slinux.c
@@ -0,0 +1,94 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/dir.h>
+#include <linux/netdevice.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include "ip_compat.h"
+#include "tcpip.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)slinux.c	1.2 8/25/95";
+#endif
+
+#define	CHUNKSIZE	8192
+#define BUFSPACE	(4*CHUNKSIZE)
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+
+static	int	timeout;
+static	char	*eth_dev = NULL;
+
+
+int	initdevice(dev, sport, tout)
+char	*dev;
+int	sport, tout;
+{
+	int fd;
+
+	eth_dev = strdup(dev);
+	if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1)
+	    {
+		perror("socket(SOCK_PACKET)");
+		exit(-1);
+	    }
+
+	return fd;
+}
+
+
+/*
+ * output an IP packet onto a fd opened for /dev/nit
+ */
+int	sendip(fd, pkt, len)
+int	fd, len;
+char	*pkt;
+{
+	struct	sockaddr	s;
+	struct	ifreq	ifr;
+
+	strncpy(ifr.ifr_name, eth_dev, sizeof(ifr.ifr_name));
+	if (ioctl(fd, SIOCGIFHWADDR, &ifr) == -1)
+	    {
+		perror("SIOCGIFHWADDR");
+		return -1;
+	    }
+	bcopy(ifr.ifr_hwaddr.sa_data, pkt + 6, 6);
+	s.sa_family = ETHERTYPE_IP;
+	strncpy(s.sa_data, eth_dev, sizeof(s.sa_data));
+
+	if (sendto(fd, pkt, len, 0, &s, sizeof(s)) == -1)
+	    {
+		perror("send");
+		return -1;
+	    }
+
+	return len;
+}
diff --git a/contrib/ipfilter/ipsend/snit.c b/contrib/ipfilter/ipsend/snit.c
new file mode 100644
index 0000000..d022192
--- /dev/null
+++ b/contrib/ipfilter/ipsend/snit.c
@@ -0,0 +1,160 @@
+/*
+ * (C)opyright October 1992 Darren Reed. (from tcplog)
+ *
+ *   This software may be freely distributed as long as it is not altered
+ * in any way and that this messagge always accompanies it.
+ *
+ *   The author of this software makes no garuntee about the
+ * performance of this package or its suitability to fulfill any purpose.
+ *
+ */
+
+#include <stdio.h>
+#include <netdb.h>
+#include <ctype.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/timeb.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <net/nit.h>
+#include <sys/fcntlcom.h>
+#include <sys/dir.h>
+#include <net/nit_if.h>
+#include <net/nit_pf.h>
+#include <net/nit_buf.h>
+#include <net/packetfilt.h>
+#include <sys/stropts.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip_var.h>
+#include <netinet/udp.h>
+#include <netinet/udp_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	snitid[] = "@(#)snit.c	1.5 1/11/96 (C)1995 Darren Reed";
+#endif
+
+#define	CHUNKSIZE	8192
+#define BUFSPACE	(4*CHUNKSIZE)
+
+/*
+ * Be careful to only include those defined in the flags option for the
+ * interface are included in the header size.
+ */
+#define BUFHDR_SIZE  (sizeof(struct nit_bufhdr))
+#define NIT_HDRSIZE  (BUFHDR_SIZE)
+
+static	int	timeout;
+
+
+int	initdevice(device, sport, tout)
+char	*device;
+int	sport, tout;
+{
+	struct	strioctl si;
+	struct	timeval to;
+	struct	ifreq ifr;
+	int	fd;
+
+	if ((fd = open("/dev/nit", O_RDWR)) < 0)
+	    {
+		perror("/dev/nit");
+		exit(-1);
+	    }
+
+	/*
+	 * arrange to get messages from the NIT STREAM and use NIT_BUF option
+	 */
+	ioctl(fd, I_SRDOPT, (char*)RMSGD);
+	ioctl(fd, I_PUSH, "nbuf");
+
+	/*
+	 * set the timeout
+	 */
+	timeout = tout;
+	si.ic_timout = 1;
+	to.tv_sec = 1;
+	to.tv_usec = 0;
+	si.ic_cmd = NIOCSTIME;
+	si.ic_len = sizeof(to);
+	si.ic_dp = (char*)&to;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+	    {
+		perror("ioctl: NIT timeout");
+		exit(-1);
+	    }
+
+	/*
+	 * request the interface
+	 */
+	strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+	ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' ';
+	si.ic_cmd = NIOCBIND;
+	si.ic_len = sizeof(ifr);
+	si.ic_dp = (char*)&ifr;
+	if (ioctl(fd, I_STR, (char*)&si) == -1)
+	    {
+		perror(ifr.ifr_name);
+		exit(1);
+	    }
+	return fd;
+}
+
+
+/*
+ * output an IP packet onto a fd opened for /dev/nit
+ */
+int	sendip(fd, pkt, len)
+int	fd, len;
+char	*pkt;
+{			
+	struct	sockaddr sk, *sa = &sk;
+	struct	strbuf	cbuf, *cp = &cbuf, dbuf, *dp = &dbuf;
+
+	/*
+	 * For ethernet, need at least 802.3 header and IP header.
+	 */
+	if (len < (sizeof(sa->sa_data) + sizeof(struct ip)))
+		return -1;
+	/*
+	 * to avoid any output processing for IP, say we're not.
+	 */
+	sa->sa_family = AF_UNSPEC;
+	bcopy(pkt, sa->sa_data, sizeof(sa->sa_data));
+	pkt += sizeof(sa->sa_data);
+	len -= sizeof(sa->sa_data);
+
+	/*
+	 * construct NIT STREAMS messages, first control then data.
+	 */
+	cp->len = sizeof(*sa);
+	cp->maxlen = sizeof(*sa);
+	cp->buf = (char *)sa;
+
+	dp->buf = pkt;
+	dp->len = len;
+	dp->maxlen = dp->len;
+
+	if (putmsg(fd, cp, dp, 0) == -1)
+	    {
+		perror("putmsg");
+		return -1;
+	    }
+
+	if (ioctl(fd, I_FLUSH, FLUSHW) == -1)
+	    {
+		perror("I_FLUSH");
+		return -1;
+	    }
+	return len;
+}
diff --git a/contrib/ipfilter/ipsend/sock.c b/contrib/ipfilter/ipsend/sock.c
new file mode 100644
index 0000000..58949c5
--- /dev/null
+++ b/contrib/ipfilter/ipsend/sock.c
@@ -0,0 +1,370 @@
+/*
+ * sock.c (C) 1995 Darren Reed
+ *
+ * The author provides this program as-is, with no gaurantee for its
+ * suitability for any specific purpose.  The author takes no responsibility
+ * for the misuse/abuse of this program and provides it for the sole purpose
+ * of testing packet filter policies.  This file maybe distributed freely
+ * providing it is not modified and that this notice remains in tact.
+ */
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)sock.c	1.2 1/11/96 (C)1995 Darren Reed";
+#endif
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/dir.h>
+#define _KERNEL
+#define	KERNEL
+#include <sys/file.h>
+#undef  _KERNEL
+#undef  KERNEL
+#include <nlist.h>
+#include <sys/user.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/proc.h>
+#include <kvm.h>
+#ifdef sun
+#include <sys/systm.h>
+#include <sys/session.h>
+#endif
+#if BSD >= 199103
+#include <sys/sysctl.h>
+#include <sys/filedesc.h>
+#include <paths.h>
+#endif
+#include <math.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <net/if.h>
+#include <net/route.h>
+#include <netinet/ip_var.h>
+#include <netinet/in_pcb.h>
+#include <netinet/tcp_timer.h>
+#include <netinet/tcp_var.h>
+#include <netinet/tcpip.h>
+
+int	nproc;
+struct	proc	*proc;
+
+extern	int	initdevice(), send_tcp();
+
+#ifndef	KMEM
+# ifdef	_PATH_KMEM
+#  define	KMEM	_PATH_KMEM
+# endif
+#endif
+#ifndef	KERNEL
+# ifdef	_PATH_UNIX
+#  define	KERNEL	_PATH_UNIX
+# endif
+#endif
+#ifndef	KMEM
+# define	KMEM	"/dev/kmem"
+#endif
+#ifndef	KERNEL
+# define	KERNEL	"/vmunix"
+#endif
+
+int	kmemcpy(buf, pos, n)
+char	*buf;
+off_t	pos;
+int	n;
+{
+	static	int	kfd = -1;
+
+	if (kfd == -1)
+		kfd = open(KMEM, O_RDONLY);
+
+	if (lseek(kfd, pos, SEEK_SET) == -1)
+	    {
+		perror("lseek");
+		return -1;
+	    }
+	if (read(kfd, buf, n) == -1)
+	    {
+		perror("read");
+		return -1;
+	    }
+	return n;
+}
+
+struct	nlist	names[3] = {
+	{ "_proc" },
+	{ "_nproc" },
+	{ NULL }
+	};
+
+#if BSD < 199103
+struct	proc	*getproc()
+{
+	struct	proc	*p;
+	pid_t	pid = getpid();
+	int	siz, n;
+
+	n = nlist(KERNEL, names);
+	if (n != 0)
+	    {
+		fprintf(stderr, "nlist(%#x) == %d\n", names, n);
+		return NULL;
+	    }
+	if (kmemcpy((char *)&nproc, (off_t)names[1].n_value,
+		    sizeof(nproc)) == -1)
+	    {
+		fprintf(stderr, "read nproc (%#x)\n", names[1].n_value);
+		return NULL;
+	    }
+	siz = nproc * sizeof(struct proc);
+	if (kmemcpy((char *)&p, (off_t)names[0].n_value, sizeof(p)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			names[0].n_value, &p, sizeof(p));
+		return NULL;
+	    }
+	proc = (struct proc *)malloc(siz);
+	if (kmemcpy((char *)proc, (off_t)p, siz) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) proc\n",
+			p, proc, siz);
+		return NULL;
+	    }
+
+	p = proc;
+
+	for (n = nproc; n; n--, p++)
+		if (p->p_pid == pid)
+			break;
+	if (!n)
+		return NULL;
+
+	return p;
+}
+
+
+struct	tcpcb	*find_tcp(fd, ti)
+int	fd;
+struct	tcpiphdr *ti;
+{
+	struct	tcpcb	*t;
+	struct	inpcb	*i;
+	struct	socket	*s;
+	struct	user	*up;
+	struct	proc	*p;
+	struct	file	*f, **o;
+
+	if (!(p = getproc()))
+		return NULL;
+
+	up = (struct user *)malloc(sizeof(*up));
+	if (kmemcpy((char *)up, (off_t)p->p_uarea, sizeof(*up)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x) failed\n", p, p->p_uarea);
+		return NULL;
+	    }
+
+	o = (struct file **)calloc(1, sizeof(*o) * (up->u_lastfile + 1));
+	if (kmemcpy((char *)o, (off_t)up->u_ofile,
+		    (up->u_lastfile + 1) * sizeof(*o)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - u_ofile - failed\n",
+			up->u_ofile_arr, o, sizeof(*o));
+		return NULL;
+	    }
+	f = (struct file *)calloc(1, sizeof(*f));
+	if (kmemcpy((char *)f, (off_t)o[fd], sizeof(*f)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - o[fd] - failed\n",
+			up->u_ofile_arr[fd], f, sizeof(*f));
+		return NULL;
+	    }
+
+	s = (struct socket *)calloc(1, sizeof(*s));
+	if (kmemcpy((char *)s, (off_t)f->f_data, sizeof(*s)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - f_data - failed\n",
+			o[fd], s, sizeof(*s));
+		return NULL;
+	    }
+
+	i = (struct inpcb *)calloc(1, sizeof(*i));
+	if (kmemcpy((char *)i, (off_t)s->so_pcb, sizeof(*i)) == -1)
+	    {
+		fprintf(stderr, "kvm_read(%#x,%#x,%d) - so_pcb - failed\n",
+			s->so_pcb, i, sizeof(*i));
+		return NULL;
+	    }
+
+	t = (struct tcpcb *)calloc(1, sizeof(*t));
+	if (kmemcpy((char *)t, (off_t)i->inp_ppcb, sizeof(*t)) == -1)
+	    {
+		fprintf(stderr, "read(%#x,%#x,%d) - inp_ppcb - failed\n",
+			i->inp_ppcb, t, sizeof(*t));
+		return NULL;
+	    }
+	return (struct tcpcb *)i->inp_ppcb;
+}
+#else
+struct	kinfo_proc	*getproc()
+{
+	static	struct	kinfo_proc kp;
+	pid_t	pid = getpid();
+	int	n, mib[4];
+
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROC;
+	mib[2] = KERN_PROC_PID;
+	mib[3] = pid;
+
+	n = 1;
+	if (sysctl(mib, 4, &kp, &n, NULL, 0) == -1)
+	    {
+		perror("sysctl");
+		return NULL;
+	    }
+	return &kp;
+}
+
+
+struct	tcpcb	*find_tcp(tfd, ti)
+int	tfd;
+struct	tcpiphdr *ti;
+{
+	struct	tcpcb	*t;
+	struct	inpcb	*i;
+	struct	socket	*s;
+	struct	filedesc	*fd;
+	struct	kinfo_proc	*p;
+	struct	file	*f, **o;
+
+	if (!(p = getproc()))
+		return NULL;
+
+	fd = (struct filedesc *)malloc(sizeof(*fd));
+	if (kmemcpy((char *)fd, (void *)p->kp_proc.p_fd, sizeof(*fd)) == -1)
+	    {
+		fprintf(stderr, "read(%#lx,%#lx) failed\n",
+			(u_long)p, (u_long)p->kp_proc.p_fd);
+		return NULL;
+	    }
+
+	o = (struct file **)calloc(1, sizeof(*o) * (fd->fd_lastfile + 1));
+	if (kmemcpy((char *)o, (void *)fd->fd_ofiles,
+		    (fd->fd_lastfile + 1) * sizeof(*o)) == -1)
+	    {
+		fprintf(stderr, "read(%#lx,%#lx,%d) - u_ofile - failed\n",
+			(u_long)fd->fd_ofiles, (u_long)o, sizeof(*o));
+		return NULL;
+	    }
+	f = (struct file *)calloc(1, sizeof(*f));
+	if (kmemcpy((char *)f, (void *)o[tfd], sizeof(*f)) == -1)
+	    {
+		fprintf(stderr, "read(%#lx,%#lx,%d) - o[tfd] - failed\n",
+			(u_long)o[tfd], (u_long)f, sizeof(*f));
+		return NULL;
+	    }
+
+	s = (struct socket *)calloc(1, sizeof(*s));
+	if (kmemcpy((char *)s, (void *)f->f_data, sizeof(*s)) == -1)
+	    {
+		fprintf(stderr, "read(%#lx,%#lx,%d) - f_data - failed\n",
+			(u_long)f->f_data, (u_long)s, sizeof(*s));
+		return NULL;
+	    }
+
+	i = (struct inpcb *)calloc(1, sizeof(*i));
+	if (kmemcpy((char *)i, (void *)s->so_pcb, sizeof(*i)) == -1)
+	    {
+		fprintf(stderr, "kvm_read(%#lx,%#lx,%d) - so_pcb - failed\n",
+			(u_long)s->so_pcb, (u_long)i, sizeof(*i));
+		return NULL;
+	    }
+
+	t = (struct tcpcb *)calloc(1, sizeof(*t));
+	if (kmemcpy((char *)t, (void *)i->inp_ppcb, sizeof(*t)) == -1)
+	    {
+		fprintf(stderr, "read(%#lx,%#lx,%d) - inp_ppcb - failed\n",
+			(u_long)i->inp_ppcb, (u_long)t, sizeof(*t));
+		return NULL;
+	    }
+	return (struct tcpcb *)i->inp_ppcb;
+}
+#endif /* BSD < 199301 */
+
+int	do_socket(dev, mtu, ti, gwip, flags)
+char	*dev;
+int	mtu;
+struct	tcpiphdr *ti;
+struct	in_addr	gwip;
+int	flags;
+{
+	struct	sockaddr_in	rsin, lsin;
+	struct	tcpcb	*t, tcb;
+	int	fd, nfd, len;
+
+	printf("Dest. Port: %d\n", ti->ti_dport);
+
+	fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (fd == -1)
+	    {
+		perror("socket");
+		return -1;
+	    }
+
+	if (fcntl(fd, F_SETFL, FNDELAY) == -1)
+	    {
+		perror("fcntl");
+		return -1;
+	    }
+
+	bzero((char *)&lsin, sizeof(lsin));
+	lsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_src, (char *)&lsin.sin_addr,
+	      sizeof(struct in_addr));
+	if (bind(fd, (struct sockaddr *)&lsin, sizeof(lsin)) == -1)
+	    {
+		perror("bind");
+		return -1;
+	    }
+	len = sizeof(lsin);
+	(void) getsockname(fd, (struct sockaddr *)&lsin, &len);
+	ti->ti_sport = lsin.sin_port;
+	printf("sport %d\n", ntohs(lsin.sin_port));
+	nfd = initdevice(dev, ntohs(lsin.sin_port));
+
+	if (!(t = find_tcp(fd, ti)))
+		return -1;
+
+	bzero((char *)&rsin, sizeof(rsin));
+	rsin.sin_family = AF_INET;
+	bcopy((char *)&ti->ti_dst, (char *)&rsin.sin_addr,
+	      sizeof(struct in_addr));
+	rsin.sin_port = ti->ti_dport;
+	if (connect(fd, (struct sockaddr *)&rsin, sizeof(rsin)) == -1 &&
+	    errno != EINPROGRESS)
+	    {
+		perror("connect");
+		return -1;
+	    }
+	kmemcpy((char*)&tcb, (void *)t, sizeof(tcb));
+	ti->ti_win = tcb.rcv_adv;
+	ti->ti_seq = tcb.snd_nxt - 1;
+	ti->ti_ack = tcb.rcv_nxt;
+
+	if (send_tcp(nfd, mtu, ti, gwip, TH_SYN) == -1)
+		return -1;
+	(void)write(fd, "Hello World\n", 12);
+	sleep(2);
+	close(fd);
+	return 0;
+}
diff --git a/contrib/ipfilter/ipsend/tcpip.h b/contrib/ipfilter/ipsend/tcpip.h
new file mode 100644
index 0000000..78f274f
--- /dev/null
+++ b/contrib/ipfilter/ipsend/tcpip.h
@@ -0,0 +1,38 @@
+/*	@(#)tcpip.h 1.7 88/08/19 SMI; from UCB 7.1 6/5/85	*/
+
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+
+/*
+ * Tcp+ip header, after ip options removed.
+ */
+
+#ifndef _netinet_tcpip_h
+#define _netinet_tcpip_h
+
+struct tcpiphdr {
+	struct 	ipovly ti_i;		/* overlaid ip structure */
+	tcphdr_t ti_t;		/* tcp header */
+};
+#define	ti_next		ti_i.ih_next
+#define	ti_prev		ti_i.ih_prev
+#define	ti_x1		ti_i.ih_x1
+#define	ti_pr		ti_i.ih_pr
+#define	ti_len		ti_i.ih_len
+#define	ti_src		ti_i.ih_src
+#define	ti_dst		ti_i.ih_dst
+#define	ti_sport	ti_t.th_sport
+#define	ti_dport	ti_t.th_dport
+#define	ti_seq		ti_t.th_seq
+#define	ti_ack		ti_t.th_ack
+#define	ti_x2		ti_t.th_x2
+#define	ti_off		ti_t.th_off
+#define	ti_flags	ti_t.th_flags
+#define	ti_win		ti_t.th_win
+#define	ti_sum		ti_t.th_sum
+#define	ti_urp		ti_t.th_urp
+
+#endif /*!_netinet_tcpip_h*/
diff --git a/contrib/ipfilter/ipt.c b/contrib/ipfilter/ipt.c
new file mode 100644
index 0000000..b934c2f
--- /dev/null
+++ b/contrib/ipfilter/ipt.c
@@ -0,0 +1,199 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include "ip_fil.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+#include "ipf.h"
+#include "ipt.h"
+#include <ctype.h>
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)ipt.c	1.19 6/3/96 (C) 1993-1996 Darren Reed";
+static	char	rcsid[] = "$Id: ipt.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+extern	int	fr_check();
+extern	char	*optarg;
+extern	struct	frentry	*ipfilter[2][2];
+extern	struct	ipread	snoop, etherf, tcpd, pcap, iptext, iphex;
+extern	void	debug(), verbose();
+
+struct frentry	*ft_in  = NULL, *ft_out = NULL;
+
+int	opts = 0;
+
+int main(argc,argv)
+int argc;
+char *argv[];
+{
+	struct	ipread	*r = &iptext;
+	struct	frentry	*f;
+	struct	ip	*ip;
+	u_long	buf[64];
+	char	c;
+	char	*rules = NULL, *datain = NULL, *iface = NULL;
+	int	fd, i, dir = 0;
+
+	while ((c = getopt(argc, argv, "bdEHi:I:Pr:STvX")) != -1)
+		switch (c)
+		{
+		case 'b' :
+			opts |= OPT_BRIEF;
+			break;
+		case 'd' :
+			opts |= OPT_DEBUG;
+			break;
+		case 'i' :
+			datain = optarg;
+			break;
+		case 'I' :
+			iface = optarg;
+			break;
+		case 'r' :
+			rules = optarg;
+			break;
+		case 'v' :
+			opts |= OPT_VERBOSE;
+			break;
+		case 'E' :
+			r = &etherf;
+			break;
+		case 'H' :
+			r = &iphex;
+			break;
+		case 'P' :
+			r = &pcap;
+			break;
+		case 'S' :
+			r = &snoop;
+			break;
+		case 'T' :
+			r = &tcpd;
+			break;
+		case 'X' :
+			r = &iptext;
+			break;
+		}
+
+	if (!rules) {
+		(void)fprintf(stderr,"no rule file present\n");
+		exit(-1);
+	}
+
+	initparse();
+
+	if (rules) {
+		struct	frentry *fr;
+		char	line[513], *s;
+		FILE	*fp;
+
+		if (!strcmp(rules, "-"))
+			fp = stdin;
+		else if (!(fp = fopen(rules, "r"))) {
+			(void)fprintf(stderr, "couldn't open %s\n", rules);
+			exit(-1);
+		}
+		if (!(opts & OPT_BRIEF))
+			(void)printf("opening rule file \"%s\"\n", rules);
+		while (fgets(line, sizeof(line)-1, fp)) {
+			/*
+			 * treat both CR and LF as EOL
+			 */
+			if ((s = index(line, '\n')))
+				*s = '\0';
+			if ((s = index(line, '\r')))
+				*s = '\0';
+			/*
+			 * # is comment marker, everything after is a ignored
+			 */
+			if ((s = index(line, '#')))
+				*s = '\0';
+
+			if (!*line)
+				continue;
+
+			if (!(fr = parse(line)))
+				continue;
+			f = (struct frentry *)malloc(sizeof(*f));
+			if (fr->fr_flags & FR_INQUE) {
+				if (!ft_in)
+					ft_in = ipfilter[0][0] = f;
+				else
+					ft_in->fr_next = f, ft_in = f;
+			} else if (fr->fr_flags & FR_OUTQUE) {
+				if (!ft_out)
+					ft_out = ipfilter[1][0] = f;
+				else
+					ft_out->fr_next = f, ft_out = f;
+			}
+			bcopy((char *)fr, (char *)f, sizeof(*fr));
+		}
+		(void)fclose(fp);
+	}
+
+	if (datain)
+		fd = (*r->r_open)(datain);
+	else
+		fd = (*r->r_open)("-");
+
+	if (fd < 0)
+		exit(-1);
+
+	ip = (struct ip *)buf;
+	while ((i = (*r->r_readip)(buf, sizeof(buf), &iface, &dir)) > 0) {
+		ip->ip_off = ntohs(ip->ip_off);
+		ip->ip_len = ntohs(ip->ip_len);
+		switch (fr_check(ip, ip->ip_hl << 2, iface, dir))
+		{
+		case -1 :
+			(void)printf("block");
+			break;
+		case 0 :
+			(void)printf("pass");
+			break;
+		case 1 :
+			(void)printf("nomatch");
+			break;
+		}
+		if (!(opts & OPT_BRIEF)) {
+			putchar(' ');
+			printpacket(buf);
+			printf("--------------");
+		}
+		putchar('\n');
+		dir = 0;
+	}
+	(*r->r_close)();
+	return 0;
+}
diff --git a/contrib/ipfilter/ipt.h b/contrib/ipfilter/ipt.h
new file mode 100644
index 0000000..be481ca
--- /dev/null
+++ b/contrib/ipfilter/ipt.h
@@ -0,0 +1,16 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ * $Id: ipt.h,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $
+ */
+
+#include <fcntl.h>
+
+struct	ipread	{
+	int	(*r_open)();
+	int	(*r_close)();
+	int	(*r_readip)();
+};
diff --git a/contrib/ipfilter/kmem.c b/contrib/ipfilter/kmem.c
new file mode 100644
index 0000000..3334580
--- /dev/null
+++ b/contrib/ipfilter/kmem.c
@@ -0,0 +1,68 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+/*
+ * kmemcpy() - copies n bytes from kernel memory into user buffer.
+ * returns 0 on success, -1 on error.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/file.h>
+
+#define KMEM "/dev/kmem"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static  char    sccsid[] = "@(#)kmem.c	1.4 1/12/96 (C) 1992 Darren Reed";
+static	char	rcsid[] = "$Id: kmem.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+static	int	kmemfd = -1;
+
+int	openkmem()
+{
+	if ((kmemfd = open(KMEM,O_RDONLY)) == -1)
+	    {
+		perror("kmeminit:open");
+		return -1;
+	    }
+	return kmemfd;
+}
+
+int	kmemcpy(buf, pos, n)
+register char	*buf;
+long	pos;
+register int	n;
+{
+	register int	r;
+
+	if (!n)
+		return 0;
+	if (kmemfd == -1)
+		if (openkmem() == -1)
+			return -1;
+	if (lseek(kmemfd, pos, 0) == -1)
+	    {
+		perror("kmemcpy:lseek");
+		return -1;
+	    }
+	while ((r = read(kmemfd, buf, n)) < n)
+		if (r <= 0)
+		    {
+			perror("kmemcpy:read");
+			return -1;
+		    }
+		else
+		    {
+			buf += r;
+			n -= r;
+		    }
+	return 0;
+}
diff --git a/contrib/ipfilter/kmem.h b/contrib/ipfilter/kmem.h
new file mode 100644
index 0000000..18c1c23
--- /dev/null
+++ b/contrib/ipfilter/kmem.h
@@ -0,0 +1,12 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ * $Id: kmem.h,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $
+ */
+
+extern	int	openkmem();
+extern	int	kmemcpy();
+
diff --git a/contrib/ipfilter/linux.h b/contrib/ipfilter/linux.h
new file mode 100644
index 0000000..f4d3bda
--- /dev/null
+++ b/contrib/ipfilter/linux.h
@@ -0,0 +1,19 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.  The author accepts no
+ * responsibility and is not changed in any way.
+ *
+ * I hate legaleese, don't you ?
+ * $Id: linux.h,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $
+ */
+
+#include <linux/config.h>
+#ifdef MODULE
+#include <linux/module.h>
+#include <linux/version.h>
+#endif /* MODULE */
+
+#include "ip_compat.h"
diff --git a/contrib/ipfilter/man/Makefile b/contrib/ipfilter/man/Makefile
new file mode 100644
index 0000000..c62e54c
--- /dev/null
+++ b/contrib/ipfilter/man/Makefile
@@ -0,0 +1,21 @@
+#
+# (C)opyright 1993, 1994, 1995 by Darren Reed.
+#
+# This code may be freely distributed as long as it retains this notice
+# and is not changed in any way.  The author accepts no responsibility
+# for the use of this software.  I hate legaleese, don't you ?
+
+all:
+
+install:
+	$(INSTALL) -m 0644 -c -o root -g bin ipf.1 $(MANDIR)/man1
+	$(INSTALL) -m 0644 -c -o root -g bin ipftest.1 $(MANDIR)/man1
+	$(INSTALL) -m 0644 -c -o root -g bin ipnat.1 $(MANDIR)/man1
+	$(INSTALL) -m 0644 -c -o root -g bin ipf.4 $(MANDIR)/man4
+	$(INSTALL) -m 0644 -c -o root -g bin ipl.4 $(MANDIR)/man4
+	$(INSTALL) -m 0644 -c -o root -g bin ipnat.4 $(MANDIR)/man4
+	$(INSTALL) -m 0644 -c -o root -g bin ipf.5 $(MANDIR)/man5
+	$(INSTALL) -m 0644 -c -o root -g bin ipnat.5 $(MANDIR)/man5
+	$(INSTALL) -m 0644 -c -o root -g bin ipmon.8 $(MANDIR)/man8
+	$(INSTALL) -m 0644 -c -o root -g bin ipfstat.8 $(MANDIR)/man8
+	@echo "Remember to rebuild the whatis database."
diff --git a/contrib/ipfilter/man/ipf.1 b/contrib/ipfilter/man/ipf.1
new file mode 100644
index 0000000..912d7ef
--- /dev/null
+++ b/contrib/ipfilter/man/ipf.1
@@ -0,0 +1,109 @@
+.TH IPF 1
+.SH NAME
+ipf \- alters packet filtering lists for IP packet input and ouput
+.SH SYNOPSIS
+.B ipf
+[
+.B \-AdDEInorsUvyzZ
+] [
+.B \-l
+<block|pass|nomatch>
+] [
+.B \-F
+<i|o|a>
+]
+.B \-f
+<\fIfilename\fP>
+[
+.B \-f
+<\fIfilename\fP>
+[...]]
+.SH DESCRIPTION
+.PP
+\fBipf\fP opens the filenames listed (treating "\-" as stdin) and parses the
+file for a set of rules which are to be added or removed from the packet
+filter rule set.
+.PP
+Each rule processed by \fBipf\fP
+is added to the kernel's internal lists if there are no parsing problems.
+Rules are added to the end of the internal lists, matching the order in
+which they appear when given to \fBipf\fP.
+.SH OPTIONS
+.TP
+.B \-A
+Set the list to make changes to the active list (default).
+.TP
+.B \-d
+Turn debug mode on.  Causes a hexdump of filter rules to be generated as
+it processes each one.
+.TP
+.B \-D
+Disable the filter (if enabled).  Not effective for loadable kernel versions.
+.TP
+.B \-E
+Enable the filter (if disabled).  Not effective for loadable kernel versions.
+.TP
+.BR \-F \0<param>
+This option specifies which filter list to flush.  The parameter should
+either be "i" (input), "o" (output) or "a" (remove all filter rules).
+Either a single letter or an entire word starting with the appropriate
+letter maybe used.  This option maybe before, or after, any other with
+the order on the command line being that used to execute options.
+.TP
+.BR \-f \0<filename>
+This option specifies which files
+\fBipf\fP should use to get input from for modifying the packet filter rule
+lists.
+.TP
+.B \-I
+Set the list to make changes to the inactive list.
+.TP
+.B \-l \0<param>
+Use of the \fB-l\fP flag toggles default logging of packets.  Valid
+arguments to this option are \fBpass\fP, \fBblock\fP and \fBnomatch\fP.
+When an option is set, any packet which exits filtering and matches the
+set category is logged.  This is most useful for causing all packets
+which don't match any of the loaded rules to be logged.
+.TP
+.B \-n
+This flag (no-change) prevents \fBipf\fP from actually making any ioctl
+calls or doing anything which would alter the currently running kernel.
+.TP
+.B \-o
+Force rules by default to be added/deleted to/from the output list, rather
+than the (default) input list.
+.TP
+.B \-r
+Remove matching filter rules rather than add them to the internal lists
+.TP
+.B \-s
+Swap the active filter list in use to be the "other" one.
+.TP
+.B \-U
+(SOLARIS 2 ONLY) Block packets travelling along the data stream which aren't
+recognised as IP packets.  They will be printed out on the console.
+.TP
+.B \-v
+Turn verbose mode on.  Displays information relating to rule processing.
+.TP
+.B \-y
+(SOLARIS 2 ONLY) Manually resync the in-kernel interface list maintained
+by IP Filter with the current interface status list.
+.TP
+.B \-z
+For each rule in the input file, reset the statistics for it to zero and
+display the statistics prior to them being zero'd.
+.TP
+.B \-Z
+Zero global statistics held in the kernel for filtering only (this doesn't
+affect fragment or state statistics).
+.DT
+.SH SEE ALSO
+ipfstat(1), ipftest(1), ipf(5)
+.SH DIAGNOSTICS
+.PP
+Needs to be run as root for the packet filtering lists to actually
+be affected inside the kernel.
+.SH BUGS
+.PP
+If you find any, please send email to me at darrenr@cyber.com.au
diff --git a/contrib/ipfilter/man/ipf.4 b/contrib/ipfilter/man/ipf.4
new file mode 100644
index 0000000..ff17f4f
--- /dev/null
+++ b/contrib/ipfilter/man/ipf.4
@@ -0,0 +1,184 @@
+.TH IPF 4
+.SH NAME
+ipf \- packet filtering kernel interface
+.SH SYNOPSIS
+#include <sys/ip_fil.h>
+.SH IOCTLS
+.PP
+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, 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, SIOCIPFFL, int *)
+.fi
+.PP
+The variations, SIOCADAFR vs. SIOCADIFR, allow operation on the two lists,
+active and inactive, respectively.  All of these ioctl's are implemented
+as being routing ioctls and thus the same rules for the various routing
+ioctls and the file descriptor are employed, mainly being that the fd must
+be that of the device associated with the module (i.e., /dev/ipl).
+.LP
+.PP
+The three groups of ioctls above perform adding rules to the end of the
+list (SIOCAD*), deletion of rules from any place in the list (SIOCRM*)
+and insertion of a rule into the list (SIOCIN*).  The rule place into
+which it is inserted is stored in the "fr_hits" field, below.
+.LP
+.nf
+typedef struct  frentry {
+        struct  frentry *fr_next;
+        struct  ifnet   *fr_ifa;
+        u_long  fr_hits;
+        u_long  fr_bytes;       /* this is only incremented when a packet */
+                                /* stops matching on this rule */
+        /*
+         * Fields after this may not change whilst in the kernel.
+         */
+        struct  fr_ip   fr_ip;
+        struct  fr_ip   fr_mip;
+
+        u_char  fr_tcpfm;       /* tcp flags mask */
+        u_char  fr_tcpf;        /* tcp flags */
+
+        u_short fr_icmpm;       /* data for ICMP packets (mask) */
+        u_short fr_icmp;
+
+        u_char  fr_scmp;        /* data for port comparisons */
+        u_char  fr_dcmp;
+        u_short fr_dport;
+        u_short fr_sport;
+        u_short fr_stop;        /* top port for <> and >< */
+        u_short fr_dtop;        /* top port for <> and >< */
+        u_long  fr_flags;       /* per-rule flags && options (see below) */
+        int     (*fr_func)();   /* call this function */
+        char    fr_icode;       /* return ICMP code */
+        char    fr_ifname[IFNAMSIZ];
+        struct  frdest  fr_tif; /* "to" interface */
+        struct  frdest  fr_dif; /* duplicate packet interfaces */
+} frentry_t;
+.fi
+.PP
+When adding a new rule, all unused fields (in the filter rule) should be
+initialised to be zero.  To insert a rule, at a particular position in the
+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:
+.nf
+
+	FR_BLOCK        0x00001    /* do not allow packet to pass */
+	FR_PASS         0x00002    /* allow packet to pass */
+	FR_OUTQUE       0x00004    /* outgoing packets */
+	FR_INQUE        0x00008    /* ingoing packets */
+	FR_LOG          0x00010    /* Log */
+	FR_LOGP         0x00011    /* Log-pass */
+	FR_LOGB         0x00012    /* Log-fail */
+        FR_LOGBODY      0x00020    /* log the body of packets too */
+        FR_LOGFIRST     0x00040    /* log only the first packet to match */
+	FR_RETRST       0x00080    /* return a TCP RST packet if blocked */
+	FR_RETICMP      0x00100    /* return an ICMP packet if blocked */
+        FR_NOMATCH      0x00200    /* no match occured */
+        FR_ACCOUNT      0x00400    /* count packet bytes */
+        FR_KEEPFRAG     0x00800
+        FR_KEEPSTATE    0x01000    /* keep packet flow state information */
+        FR_INACTIVE     0x02000
+        FR_QUICK        0x04000    /* quick-match and return */
+        FR_FASTROUTE    0x08000
+        FR_CALLFUNC     0x10000
+        FR_CALLNOW      0x20000
+        FR_DUP          0x40000    /* duplicate the packet (not Solaris2)
+	
+.fi
+.PP
+Values for fr_scomp and fr_dcomp (source and destination port value
+comparisons) :
+.LP
+.nf
+	FR_NONE         0
+	FR_EQUAL        1
+	FR_NEQUAL       2
+	FR_LESST        3
+	FR_GREATERT     4
+	FR_LESSTE       5
+	FR_GREATERTE    6
+	FR_OUTRANGE     7
+	FR_INRANGE      8
+.fi
+.PP
+The third ioctl, SIOCIPFFL, flushes either the input filter list, the
+output filter list or both and it returns the number of filters removed
+from the list(s).  The values which it will take and recognise are FR_INQUE
+and FR_OUTQUE (see above).
+
+\fBGeneral Logging Flags\fP
+There are two flags which can be set to log packets independantly of the
+rules used.  These allow for packets which are either passed or blocked
+to be logged.  To set (and clear)/get these flags, two ioctls are
+provided:
+.IP SIOCSETFF 16
+Takes an unsigned integer as the parameter.  The flags are then set to
+those provided (clearing/setting all in one).
+.nf
+
+	FF_LOGPASS	1
+	FF_LOGBLOCK	2
+.fi
+.IP SIOCGETFF 16
+Takes a pointer to an unsigned integer as the parameter.  A copy of the
+flags currently in used is copied to user space.
+.LP
+\fBFilter statistics\fP
+Statistics on the various operations performed by this package on packets
+is kept inside the kernel.  These statistics apply to packets traversing
+through the kernel.  To retrieve this structure, use this ioctl:
+.nf
+
+	ioctl(fd, SIOCGETFS, struct friostat *)
+
+struct	friostat        {
+	struct  filterstats     f_st[2];
+	struct  frentry *f_fin;
+	struct  frentry *f_fout;
+};
+
+struct	filterstats {
+        u_long  fr_pass;        /* packets allowed */
+        u_long  fr_block;       /* packets denied */
+        u_long  fr_nom;         /* packets which don't match any rule */
+        u_long  fr_ppkl;        /* packets allowed and logged */
+        u_long  fr_bpkl;        /* packets denied and logged */
+        u_long  fr_npkl;        /* packets unmatched and logged */
+        u_long  fr_pkl;         /* packets logged */
+        u_long  fr_skip;        /* packets to be logged but buffer full */
+        u_long  fr_ret;         /* packets for which a return is sent */
+        u_long  fr_acct;        /* packets for which counting was performed */
+        u_long  fr_bnfr;        /* bad attempts to allocate fragment state */
+        u_long  fr_nfr;         /* new fragment state kept */
+        u_long  fr_cfr;         /* add new fragment state but complete pkt */
+        u_long  fr_bads;        /* bad attempts to allocate packet state */
+        u_long  fr_ads;         /* new packet state kept */
+        u_long  fr_chit;        /* cached hit */
+#if SOLARIS
+        u_long  fr_bad;         /* bad IP packets to the filter */
+        u_long  fr_notip;       /* packets passed through no on ip queue */
+        u_long  fr_drop;        /* packets dropped - no info for them! */
+#endif
+};
+.fi
+.SH SEE ALSO
+ipfstat(1), ipf(1), ipf(5)
diff --git a/contrib/ipfilter/man/ipf.5 b/contrib/ipfilter/man/ipf.5
new file mode 100644
index 0000000..417a0ea
--- /dev/null
+++ b/contrib/ipfilter/man/ipf.5
@@ -0,0 +1,433 @@
+.TH IPF 5
+.SH NAME
+ipf \- IP packet filter rule syntax
+.SH DESCRIPTION
+.PP
+A rule file for \fBipf\fP may have any name or even be stdin.  As
+\fBipfstat\fP produces parseable rules as output when displaying the internal
+kernel filter lists, it is quite plausible to use its output to feed back
+into \fBipf\fP.  Thus, to remove all filters on input packets, the following
+could be done:
+.nf
+
+\fC# ipfstat \-i | ipf \-rf \-\fP
+.fi
+.SH GRAMMAR
+.PP
+The format used by \fBipf\fP for construction of filtering rules can be
+described using the following grammar in BNF:
+\fC
+.nf
+filter-rule = [ insert ] action in-out [ options ] [ match ] [ keep ]
+
+insert	= "@" decnumber .
+action	= block | "pass" | log | "count" | call .
+in-out	= "in" | "out" .
+options	= [ log ] [ "quick" ] [ "on" interface-name [ dup ] [ froute ] ] .
+match	= [ tos ] [ ttl ] [ proto ] [ ip ] .
+keep  	= "keep state" | "keep frags" .
+
+block	= "block" [ "return-icmp"[return-code] | "return-rst" ] .
+log   	= "log" [ "body" ] [ "first" ] [ "or-block" ] .
+call  	= "call" [ "now" ] function-name .
+
+dup   	= "dup-to" interface-name[":"ipaddr] .
+froute	= "fastroute" | "to" interface-name .
+
+tos   	= "tos" decnumber | "tos" hexnumber .
+ttl   	= "ttl" decnumber .
+proto	= "proto" protocol .
+ip    	= srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] .
+
+protocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber .
+srcdst	= "all" | fromto .
+fromto	= "from" object "to" object .
+
+object	= addr [ port-comp | port-range ] .
+addr	= "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] .
+port-comp = "port" compare port-num .
+port-range = "port" port-num range port-num .
+
+flags	= "flags" flag { flag } [ "/" flag { flag } ] .
+with	= "with" | "and" .
+icmp	= "icmp-type" icmp-type [ "code" decnumber ] .
+return-code = "("icmp-code")" .
+
+nummask	= host-name [ "/" decnumber ] .
+host-name = ipaddr | hostname | "any" .
+ipaddr	= host-num "." host-num "." host-num "." host-num .
+host-num = digit [ digit [ digit ] ] .
+port-num = service-name | decnumber .
+
+withopt = [ "not" | "no" ] opttype [ withopt ] .
+opttype = "ipopts" | "short" | "frag" | "opt" ipopts  .
+optname	= ipopts [ "," optname ] .
+ipopts  = optlist | "sec-class" [ secname ] .
+secname	= seclvl [ "," secname ] .
+seclvl  = "unclass" | "confid" | "reserv-1" | "reserv-2" | "reserv-3" |
+	  "reserv-4" | "secret" | "topsecret" .
+icmp-type = "unreach" | "echo" | "echorep" | "squench" | "redir" |
+	    "timex" | "paramprob" | "timest" | "timestrep" | "inforeq" |
+	    "inforep" | "maskreq" | "maskrep"  | decnumber .
+icmp-code = decumber | "net-unr" | "host-unr" | "proto-unr" | "port-unr" |
+	    "needfrag" | "srcfail" | "net-unk" | "host-unk" | "isolate" |
+	    "net-prohib" | "host-prohib" | "net-tos" | "host-tos" .
+optlist	= "nop" | "rr" | "zsu" | "mtup" | "mtur" | "encode" | "ts" | "tr" |
+	  "sec" | "lsrr" | "e-sec" | "cipso" | "satid" | "ssrr" | "addext" |
+	  "visa" | "imitd" | "eip" | "finn" .
+
+hexnumber = "0" "x" hexstring .
+hexstring = hexdigit [ hexstring ] .
+decnumber = digit [ decnumber ] .
+
+compare = "=" | "!=" | "<" | ">" | "<=" | ">=" | "eq" | "ne" | "lt" | "gt" |
+	  "le" | "ge" .
+range	= "<>" | "><" .
+hexdigit = digit | "a" | "b" | "c" | "d" | "e" | "f" .
+digit	= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" .
+flag	= "F" | "S" | "R" | "P" | "A" | "U" .
+.fi
+.PP
+This syntax is somewhat simplified for readability, some combinations
+that match this grammar are disallowed by the software because they do
+not make sense (such as tcp \fBflags\fP for non-TCP packets).
+.SH FILTER RULES
+.PP
+The "briefest" valid rules are (currently) no-ops and are of the form:
+.nf
+       block in
+       pass in
+       log in
+       count in
+.fi
+.PP
+These are supposed to be the same as, but currently differ from:
+.\" XXX How, why do they differ??
+.nf
+       block in all
+       pass in from any to any
+       log in all
+       count in all
+.fi
+.PP
+Filter rules are checked in order, with the last matching rule
+determining the fate of the packet (but see the \fBquick\fP option,
+below).
+.PP
+Filters are installed by default at the end of the kernel's filter
+lists, prepending the rule with \fB@n\fP will cause it to be inserted
+as the n'th entry in the current list. This is especially useful when
+modifying and testing active filter rulesets. See ipf(1) for more
+information.
+.SH ACTIONS
+.PP
+The action indicates what to do with the packet if it matches the rest
+of the filter rule. Each rule MUST have an action. The following
+actions are recognised:
+.TP
+.B block
+indicates that the packet should be flagged to be dropped. In response
+to blocking a packet, the filter may be instructed to send a reply
+packet, either an ICMP packet (\fBreturn-icmp\fP) or a TCP "reset"
+(\fBreturn-rst\fP).  An ICMP packet may be generated in response to
+any IP packet, and its type may optionally be specified, but a TCP
+reset may only be used with a rule which is being applied to TCP
+packets.
+.TP
+.B pass
+will flag the packet to be let through the filter.  
+.TP
+.B log
+causes the packet to be logged (as described in the LOGGING section
+below) and has no effect on whether the packet will be allowed through
+the filter.
+.TP
+.B count
+causes the packet to be included in the accounting statistics kept by
+the filter, and has no effect on whether the packet will be allowed through
+the filter. These statistics are viewable with ipfstat(8).
+.TP
+.B call
+this action is used to invoke the named function in the kernel, which
+must conform to a specific calling interface. Customised actions and
+semantics can thus be implemented to supplement those available. This
+feature is for use by knowledgeable hackers, and is not currently
+documented.
+.PP
+The next word must be either \fBin\fP or \fBout\fP.  Each packet
+moving through the kernel is either inbound (just been received on an
+interface, and moving towards the kernel's protocol processing) or
+outbound (transmitted or forwarded by the stack, and on its way to an
+interface). There is a requirement that each filter rule explicitly
+state which side of the I/O it is to be used on.
+.SH OPTIONS
+.PP
+The list of options is brief, and all are indeed optional. Where
+options are used, they must be present in the order shown here. These
+are the currently supported options:
+.TP
+.B log
+indicates that, should this be the last matching rule, the packet
+header will be written to the \fBipl\fP log (as described in the
+LOGGING section below).
+.TP
+.B quick
+allows "short-cut" rules in order to speed up the filter or override
+later rules.  If a packet matches a filter rule which is marked as
+\fBquick\fP, this rule will be the last rule checked, allowing a
+"short-circuit" path to avoid processing later rules for this
+packet. The current status of the packet (after any effects of the
+current rule) will determine whether it is passed or blocked.
+.IP
+If this option is missing, the rule is taken to be a "fall-through"
+rule, meaning that the result of the match (block/pass) is saved and
+that processing will continue to see if there are any more matches.
+.TP
+.B on
+allows an interface name to be incorporated into the matching
+procedure. Interface names are as printed by "netstat \-i". If this
+option is used, the rule will only match if the packet is going
+through that interface in the specified direction (in/out). If this
+option is absent, the rule is taken to be applied to a packet
+regardless of the interface it is present on (i.e. on all interfaces).
+Filter rulesets are common to all interfaces, rather than having a
+filter list for each interface.
+.IP
+This option is especially useful for simple IP-spoofing protection:
+packets should only be allowed to pass inbound on the interface from
+which the specified source address would be expected, others may be
+logged and/or dropped.
+.TP
+.B dup-to
+causes the packet to be copied, and the duplicate packet to be sent outbound on the specified interface, optionally with the destination IP address changed to that specified. This is useful for off-host logging, using a network sniffer.
+.TP
+.B to
+causes the packet to be moved to the outbound queue on the
+specified interface. This can be used to circumvent kernel routing
+decisions, and even to bypass the rest of the kernel processing of the
+packet (if applied to an inbound rule). It is thus possible to
+construct a firewall that behaves transparently, like a filtering hub
+or switch, rather than a router. The \fBfastroute\fP keyword is a
+synonym for this option.
+.SH MATCHING PARAMETERS
+.PP 
+The keywords described in this section are used to describe attributes
+of the packet to be used when determining whether rules match or don't
+match. The following general-purpose attributes are provided for
+matching, and must be used in this order:
+.TP
+.B tos
+packets with different Type-Of-Service values can be filtered.
+Individual service levels or combinations can be filtered upon.  The
+value for the TOS mask can either be represented as a hex number or a
+decimal integer value.
+.\" XXX TOS mask??  not in grammar!
+.TP
+.B ttl
+packets may also be selected by their Time-To-Live value.  The value given in
+the filter rule must exactly match that in the packet for a match to occur.
+This value can only be given as a decimal integer value.
+.TP
+.B proto
+allows a specific protocol to be matched against.  All protocol names
+found in \fB/etc/protocols\fP are recognised and may be used.
+However, the protocol may also be given as a DECIMAL number, allowing
+for rules to match your own protocols, or new ones which would
+out-date any attempted listing.
+.IP
+The special protocol keyword \fBtcp/udp\fP may be used to match either
+a TCP or a UDP packet, and has been added as a convenience to save
+duplication of otherwise-identical rules.
+.\" XXX grammar should reflect this (/etc/protocols)
+.PP
+The \fBfrom\fP and \fBto\fP keywords are used to match against IP
+addresses (and optionally port numbers). Rules must specify BOTH
+source and destination parameters.
+.PP 
+IP addresses may be specified in one of two ways: as a numerical
+address\fB/\fPmask, or as a hostname \fBmask\fP netmask.  The hostname
+may either be a valid hostname, from either the hosts file or DNS
+(depending on your configuration and library) or of the dotted numeric
+form.  There is no special designation for networks but network names
+are recognised.  Note that having your filter rules depend on DNS
+results can introduce an avenue of attack, and is discouraged.
+.PP
+There is a special case for the hostname \fBany\fP which is taken to
+be 0.0.0.0/0 (see below for mask syntax) and matches all IP addresses.
+Only the presence of "any" has an implied mask, in all other
+situations, a hostname MUST be accompanied by a mask.  It is possible
+to give "any" a hostmask, but in the context of this language, it is
+non-sensical.
+.PP
+The numerical format "x\fB/\fPy" indicates that a mask of y
+consecutive 1 bits set is generated, starting with the MSB, so a y value
+of 16 would give 0xffff0000. The symbolic "x \fBmask\fP y" indicates
+that the mask y is in dotted IP notation or a hexadecimal number of
+the form 0x12345678.  Note that all the bits of the IP address
+indicated by the bitmask must match the address on the packet exactly;
+there isn't currently a way to invert the sense of the match, or to
+match ranges of IP addresses which do not express themselves easily as
+bitmasks (anthropomorphization; it's not just for breakfast anymore).
+.PP
+If a \fBport\fP match is included, for either or both of source and
+destination, then it is only applied to
+.\" XXX - "may only be" ? how does this apply to other protocols? will it not match, or will it be ignored?
+TCP and UDP packets. If there is no \fBproto\fP match parameter,
+packets from both protocols are compared. This is equivalent to "proto
+tcp/udp".  When composing \fBport\fP comparisons, either the service
+name or an integer port number may be used. Port comparisons may be
+done in a number of forms, with a number of comparison operators, or
+port ranges may be specified. See the examples for more information.
+.PP
+The \fBall\fP keyword is essentially a synonym for "from any to any"
+with no other match parameters.
+.PP
+Following the source and destination matching parameters, the
+following additional parameters may be used:
+.TP
+.B with
+is used to match irregular attributes that some packets may have
+associated with them.  To match the presence of IP options in general,
+use \fBwith ipopts\fP. To match packets that are too short to contain
+a complete header, use \fBwith short\fP. To match fragmented packets,
+use \fBwith frag\fP.  For more specific filtering on IP options,
+individual options can be listed.
+.IP
+Before any parameter used after the \fBwith\fP keyword, the word
+\fBnot\fP or \fBno\fP may be inserted to cause the filter rule to only
+match if the option(s) is not present.
+.IP
+Multiple consecutive \fBwith\fP clauses are allowed.  Alternatively,
+the keyword \fBand\fP may be used in place of \fBwith\fP, this is
+provided purely to make the rules more readable ("with ... and ...").
+When multiple clauses are listed, all those must match to cause a
+match of the rule.
+.\" XXX describe the options more specifically in a separate section
+.TP
+.B flags
+is only effective for TCP filtering.  Each of the letters possible
+represents one of the possible flags that can be set in the TCP
+header.  The association is as follows:
+.LP
+.nf
+        F - FIN
+        S - SYN
+        R - RST
+        P - PUSH
+        A - ACK
+        U - URG
+.fi
+.IP
+The various flag symbols may be used in combination, so that "SA"
+would represent a SYN-ACK combination present in a packet.  There is
+nothing preventing the specification of combinations, such as "SFR",
+that would not normally be generated by law-abiding TCP
+implementations.  However, to guard against weird aberrations, it is
+necessary to state which flags you are filtering against.  To allow
+this, it is possible to set a mask indicating which TCP flags you wish
+to compare (i.e., those you deem significant).  This is done by
+appending "/<flags>" to the set of TCP flags you wish to match
+against, e.g.:
+.LP
+.nf
+	... flags S
+			# becomes "flags S/AUPRFS" and will match
+			# packets with ONLY the SYN flag set.
+
+	... flags SA
+			# becomes "flags SA/AUPRFS" and will match any
+			# packet with only the SYN and ACK flags set.
+
+	... flags S/SA
+			# will match any packet with just the SYN flag set
+			# out of the SYN-ACK pair; the common "establish"
+			# keyword action.  "S/SA" will NOT match a packet
+			# with BOTH SYN and ACK set, but WILL match "SFP".
+.fi
+.TP
+.B icmp-type
+is only effective when used with \fBproto icmp\fP and must NOT be used
+in conjuction with \fBflags\fP.  There are a number of types, which can be
+referred to by an abbreviation recognised by this language, or the numbers
+with which they are associated can be used.  The most important from
+a security point of view is the ICMP redirect.
+.SH KEEP HISTORY
+.PP
+The last parameter which can be set for a filter rule is whether on not to
+record historical information for that packet, and what sort to keep. The following information can be kept:
+.TP
+.B state
+keeps information about the flow of a communication session. State can
+be kept for TCP, UDP, and ICMP packets.
+.TP
+.B frags
+keeps information on fragmented packets, to be applied to later
+fragments.
+.PP
+allowing packets which match these to flow straight through, rather
+than going through the access control list.
+.SH LOGGING
+.PP
+When a packet is logged, with either the \fBlog\fP action or option,
+the headers of the packet are written to the \fBipl\fP packet logging
+psuedo-device. Immediately following the \fBlog\fP keyword, the
+following qualifiers may be used (in order):
+.TP
+.B body
+indicates that the first 128 bytes of the packet contents will be
+logged after the headers. 
+.TP
+.B first
+??
+.TP
+.B or-block
+indicates that, if for some reason the filter is unable to log the packet (such as the log reader being too slow) then the rule should be interpreted as if the action was \fBblock\fP for this packet.
+.PP
+See ipl(4) for the format of records written
+to this device. The ipmon(8) program can be used to read and format
+this log.
+.SH EXAMPLES
+.PP
+The \fBquick\fP option is good for rules such as:
+\fC
+.nf
+block in quick from any to any with ipopts
+.fi
+.PP
+which will match any packet with a non-standard header length (IP
+options present) and abort further processing of later rules,
+recording a match and also that the packet should be blocked.
+.PP
+The "fall-through" rule parsing allows for effects such as this:
+.LP
+.nf
+        block in from any to any port < 6000
+        pass in from any to any port >= 6000
+        block in from any to port > 6003
+.fi
+.PP
+which sets up the range 6000-6003 as being permitted and all others being
+denied.  Note that the effect of the first rule is overridden by subsequent
+rules.  Another (easier) way to do the same is:
+.LP
+.nf
+        block in from any to any port 6000 <> 6003
+        pass in from any to any port 5999 >< 6004
+.fi
+.PP
+Note that both the "block" and "pass" are needed here to effect a
+result as a failed match on the "block" action does not imply a pass,
+only that the rule hasn't taken effect.  To then allow ports < 1024, a
+rule such as:
+.LP
+.nf
+        pass in quick from any to any port < 1024
+.fi
+.PP
+would be needed before the first block.  
+.SH FILES
+/etc/services
+.br
+/etc/hosts
+.SH SEE ALSO
+ipf(1), ipftest(1)
diff --git a/contrib/ipfilter/man/ipfstat.8 b/contrib/ipfilter/man/ipfstat.8
new file mode 100644
index 0000000..db23e39
--- /dev/null
+++ b/contrib/ipfilter/man/ipfstat.8
@@ -0,0 +1,73 @@
+.TH ipfstat 8
+.SH NAME
+ipfstat \- reports on packet filter statistics and filter list
+.SH SYNOPSIS
+.B ipfstat
+[
+.B \-hIinov
+] [
+.B \-d
+<device>
+]
+.SH DESCRIPTION
+.PP
+\fBipfstat\fP examines /dev/kmem using the symbols \fB_fr_flags\fP,
+\fB_frstats\fP, \fB_filterin\fP, and \fB_filterout\fP.
+To run and work, it needs to be able to read both /dev/kmem and the
+kernel itself.  The kernel name defaults to \fB/vmunix\fP.
+.PP
+The default behaviour of \fBipfstat\fP
+is to retrieve and display the accumulated statistics which have been
+accumulated over time as the kernel has put packets through the filter.
+.SH OPTIONS
+.TP
+.B \-a
+Display the accounting filter list and show bytes counted against each rule.
+.TP
+.BR \-d \0<device>
+Use a device other than \fB/dev/ipl\fP for interfacing with the kernel.
+.TP
+.B \-f
+Show fragment state information (statistics) and held state information (in
+the kernel) if any is present.
+.TP
+.B \-h
+Show per-rule the number of times each one scores a "hit".  For use in
+combination with \fB\-i\fP.
+.TP
+.B \-i
+Display the filter list used for the input side of the kernel IP processing.
+.TP
+.B \-I
+Swap between retrieving "inactive"/"active" filter list details.  For use
+in combination with \fB\-i\fP.
+.TP
+.B \-n
+Show the "rule number" for each rule as it is printed.
+.TP
+.B \-o
+Display the filter list used for the output side of the kernel IP processing.
+.TP
+.B \-s
+Show packet/flow state information (statistics) and held state information (in
+the kernel) if any is present.
+.TP
+.B \-v
+Turn verbose mode on.  Displays more debugging information.
+.SH SYNOPSIS
+The role of \fBipfstat\fP is to display current kernel statistics gathered
+as a result of applying the filters in place (if any) to packets going in and
+out of the kernel.  This is the default operation when no command line
+parameters are present.
+.PP
+When supplied with either \fB\-i\fP or \fB\-o\fP, it will retrieve and display
+the appropriate list of filter rules currently installed and in use by the
+kernel.
+.SH FILES
+/dev/kmem
+.br
+/vmunix
+.SH SEE ALSO
+ipf(1), ipfstat(1)
+.SH BUGS
+none known.
diff --git a/contrib/ipfilter/man/ipftest.1 b/contrib/ipfilter/man/ipftest.1
new file mode 100644
index 0000000..912b3a3
--- /dev/null
+++ b/contrib/ipfilter/man/ipftest.1
@@ -0,0 +1,127 @@
+.TH ipftest 8
+.SH NAME
+ipftest \- test packet filter rules with arbitary input.
+.SH SYNOPSIS
+.B ipftest
+[
+.B \-vbdPSTEHX
+] [
+.B \-I
+interface
+]
+.B \-r
+<filename>
+[
+.B \-i
+<filename>
+]
+.SH DESCRIPTION
+.PP
+\fBipftest\fP is provided for the purpose of being able to test a set of
+filter rules without having to put them in place, in operation and proceed
+to test their effectiveness.  The hope is that this minimises disruptions
+in providing a secure IP environment.
+.PP
+\fBipftest\fP will parse any standard ruleset for use with \fBipf\fP
+and apply input, returning output as to the result.  However, \fBipftest\fP
+will return one of three values for packets passed through the filter:
+pass, block or nomatch.  This is intended to give the operator a better
+idea of what is happening with packets passing through their filter
+ruleset.
+.PP
+When used without either of \fB\-S\fP, \fB\-T\fP or \fB\-E\fP,
+\fBipftest\fP uses its own text input format to generate "fake" IP packets.
+The format used is as follows:
+.nf
+		"in"|"out" "on" if ["tcp"|"udp"|"icmp"]
+			srchost[,srcport] dsthost[,destport] [FSRPAU]
+.fi
+.PP
+This allows for a packet going "in" or "out" of an interface (if) to be
+generated, being one of the three main protocols (optionally), and if
+either TCP or UDP, a port parameter is also expected.  If TCP is selected,
+it is possible to (optionally) supply TCP flags at the end.  Some examples
+are:
+.nf
+		# a UDP packet coming in on le0
+		in on le0 udp 10.1.1.1,2210 10.2.1.5,23
+		# an IP packet coming in on le0 from localhost - hmm :)
+		in on le0 localhost 10.4.12.1
+		# a TCP packet going out of le0 with the SYN flag set.
+		out on le0 tcp 10.4.12.1,2245 10.1.1.1,23 S
+.fi
+.SH OPTIONS
+.TP
+.B \-v
+Verbose mode.  This provides more information about which parts of rule
+matching the input packet passes and fails.
+.TP
+.B \-d
+Turn on filter rule debugging.  Currently, this only shows you what caused
+the rule to not match in the IP header checking (addresses/netmasks, etc).
+.TP
+.B \-b
+Cause the output to be a brief summary (one-word) of the result of passing
+the packet through the filter; either "pass", "block" or "nomatch".
+This is used in the regression testing.
+.TP
+.BR \-I \0<interface>
+Set the interface name (used in rule matching) to be the name supplied.
+This is useful with the \fB\-P, \-S, \-T\fP and \fB\-E\fP options, where it is
+not otherwise possible to associate a packet with an interface.  Normal
+"text packets" can override this setting.
+.TP
+.B \-P
+The input file specified by \fB\-i\fP is a binary file produced using libpcap
+(i.e., tcpdump version 3).  Packets are read from this file as being input
+(for rule purposes).  An interface maybe specified using \fB\-I\fP.
+.TP
+.B \-S
+The input file is to be in "snoop" format (see RFC 1761).  Packets are read
+from this file and used as input from any interface.  This is perhaps the
+most useful input type, currently.
+.TP
+.B \-T
+The input file is to be text output from tcpdump.  The text formats which
+are currently supported are those which result from the following tcpdump
+option combinations:
+.PP
+.nf
+		tcpdump -n
+		tcpdump -nq
+		tcpdump -nqt
+		tcpdump -nqtt
+		tcpdump -nqte
+.fi
+.LP
+.TP
+.B \-H
+The input file is to be hex digits, representing the binary makeup of the
+packet.  No length correction is made, if an incorrect length is put in
+the IP header.
+.TP
+.B \-X
+The input file is composed of text descriptions of IP packets.
+.TP
+.B \-E
+The input file is to be text output from etherfind.  The text formats which
+are currently supported are those which result from the following etherfind
+option combinations:
+.PP
+.nf
+		etherfind -n
+		etherfind -n -t
+.fi
+.LP
+.TP
+.BR \-i \0<filename>
+Specify the filename from which to take input.  Default is stdin.
+.TP
+.BR \-r \0<filename>
+Specify the filename from which to read filter rules.
+.SH FILES
+.SH SEE ALSO
+ipf(1), ipf(5), snoop(1m), tcpdump(8), etherfind(8c)
+.SH BUGS
+Not all of the input formats are sufficiently capable of introducing a
+wide enough variety of packets for them to be all useful in testing.
diff --git a/contrib/ipfilter/man/ipl.4 b/contrib/ipfilter/man/ipl.4
new file mode 100644
index 0000000..0e58a50
--- /dev/null
+++ b/contrib/ipfilter/man/ipl.4
@@ -0,0 +1,62 @@
+.TH IPL 4
+.SH NAME
+ipl \- IP packet log device
+.SH DESCRIPTION
+The \fBipl\fP pseudo device's purpose is to provide an easy way to gather
+packet headers of packets you wish to log.  If a packet header is to be
+logged, the entire header is logged (including any IP options \- TCP/UDP
+options are not included when it calculates header size) or not at all.
+The packet contents are also logged after the header.
+.PP
+Prepending every packet header logged is a structure containing information
+relevant to the packet following and why it was logged.  The structure's
+format is as follows:
+.LP
+.nf
+struct ipl_ci   {
+        u_long  sec;    /* time when the packet was logged */
+        u_long  usec;
+        u_long  plen;   /* length of packet data logged */
+        u_short hlen;   /* length of headers logged */
+        u_short rule;   /* rule number (for log ...) or 0 if result = log */
+        u_long  flags:24; /* XXX FIXME do we care about the extra bytes? */
+#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606))
+        u_long  filler:8;                       /* XXX FIXME do we care? */
+        u_char  ifname[IFNAMSIZ];
+#else
+        u_long  unit:8;
+        u_char  ifname[4];
+#endif
+};
+.fi
+.PP
+In the case of the header causing the buffer to finish on a non-32bit
+boundary, padding will be `appended' to ensure that the next log entry
+is aligned to a 32bit boundary.
+.LP
+.PP
+If the packet contents is more then 128 bytes, then only 128 bytes of the
+packet contents is logged. Should the packet contents finish on a non-32bit
+boundary, then the last few bytes are not logged to ensure the log entry
+is aligned to a 32bit boundary.
+
+\fBipl\fP is a read-only (sequential) character pseudo-device.
+
+The ioctls which are loaded with this device can be found under \fBipf(4)\fP.
+The only ioctl which is used for logging and doesn't affect the filter is:
+.LP
+.nf
+        ioctl(fd, SIOCIPFFB, int *)
+.fi
+.PP
+This ioctl flushes the log buffer and returns the number of bytes flushed.
+.PP
+There is currently no support for non-blocking IO with this device, meaning
+all read operations should be considered blocking in nature (if there is no
+data to read, it will sleep until some is made available).
+.SH SEE ALSO
+ipf(4)
+.SH BUGS
+Packet headers are dropped when the internal buffer (static size) fills.
+.SH FILES
+/dev/ipl0
diff --git a/contrib/ipfilter/man/ipmon.8 b/contrib/ipfilter/man/ipmon.8
new file mode 100644
index 0000000..11ac23a
--- /dev/null
+++ b/contrib/ipfilter/man/ipmon.8
@@ -0,0 +1,56 @@
+.TH ipmon 8
+.SH NAME
+ipmon \- monitors /dev/ipl for logged packets
+.SH SYNOPSIS
+.B ipmon
+[
+.B \-sfN
+] [
+<filename>
+]
+.SH DESCRIPTION
+.LP
+\fBipmon\fP opens \fB/dev/ipl\fP for reading and awaits data to be saved from
+the packet filter.  The binary data read from the device is reprinted in
+human readable for, however, IP#'s are not mapped back to hostnames, nor are
+ports mapped back to service names.  The output goes to standard output by
+default or a filename, if given on the command line.  Should the \fB\-s\fP
+option be used, output is instead sent to \fBsyslogd(8)\fP.  Messages sent
+via syslog have the day, month and year removed from the message, but the
+time (including microseconds), as recorded in the log, is still included.
+.SH OPTIONS
+.TP
+.B \-s
+Packet information read in will be sent through syslogd rather than
+saved to a file.  The following levels are used:
+.IP
+.B LOG_INFO
+\- packets logged using the "log" keyword as the action rather
+than pass or block.
+.IP
+.B LOG_NOTICE
+\- packets logged which are also passed
+.IP
+.B LOG_WARNING
+\- packets logged which are also blocked
+.IP
+.B LOG_ERR
+\- packets which have been logged and which can be considered
+"short".
+.TP
+.B \-f
+Flush the current packet log buffer.  The number of bytes flushed is displayed,
+even should the result be zero.
+.TP
+.B \-N
+IP addresses and port numbers will be mapped, where possible, back into
+hostnames and service names.
+.SH DIAGNOSTICS
+\fBipmon\fP expects data that it reads to be consistant with how it should be
+saved and will abort if it fails an assertion which detects an anomoly in the
+recorded data.
+.SH FILES
+/dev/ipl
+.SH SEE ALSO
+ipf(1), ipfstat(1)
+.SH BUGS
diff --git a/contrib/ipfilter/man/ipnat.1 b/contrib/ipfilter/man/ipnat.1
new file mode 100644
index 0000000..c61e03b
--- /dev/null
+++ b/contrib/ipfilter/man/ipnat.1
@@ -0,0 +1,45 @@
+.TH IPNAT 1
+.SH NAME
+ipnat \- user interface to the NAT
+.SH SYNOPSIS
+.B ipnat
+[
+.B \-lnrsvCF
+]
+.B \-f <\fIfilename\fP>
+.SH DESCRIPTION
+.PP
+\fBipnat\fP opens the filename given (treating "\-" as stdin) and parses the
+file for a set of rules which are to be added or removed from the IP NAT.
+.PP
+Each rule processed by \fBipnat\fP
+is added to the kernels internal lists if there are no parsing problems.
+Rules are added to the end of the internal lists, matching the order in
+which they appear when given to \fBipnat\fP.
+.SH OPTIONS
+.TP
+.B \-C
+delete all entries in the current NAT listing (NAT rules)
+.TP
+.B \-F
+delete all active entries in the current NAT table (currently active
+NAT mappings)
+.TP
+.B \-l
+Show the list of current NAT table entry mappings.
+.TP
+.B \-n
+This flag (no-change) prevents \fBipf\fP from actually making any ioctl
+calls or doing anything which would alter the currently running kernel.
+.TP
+.B \-s
+Retrieve and display NAT statistics
+.TP
+.B \-r
+Remove matching NAT rules rather than add them to the internal lists
+.TP
+.B \-v
+Turn verbose mode on.  Displays information relating to rule processing.
+.DT
+.SH SEE ALSO
+ipfstat(1), ipftest(1), ipf(1), ipnat(5)
diff --git a/contrib/ipfilter/man/ipnat.4 b/contrib/ipfilter/man/ipnat.4
new file mode 100644
index 0000000..3346ef9
--- /dev/null
+++ b/contrib/ipfilter/man/ipnat.4
@@ -0,0 +1,88 @@
+.TH IPNAT 4
+.SH NAME
+ipnat \- Network Address Translation kernel interface
+.SH SYNOPSIS
+#include <sys/ip_fil.h>
+.SH IOCTLS
+.PP
+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 *)
+.fi
+.PP
+Unlike \fBipf(4)\fP, there is only a single list supported by the kernel NAT
+interface.  An inactive list which can be swapped to is not currently
+supported.
+
+These ioctl's are implemented as being routing ioctls and thus the same rules
+for the various routing ioctls and the file descriptor are employed, mainly
+being that the fd must be that of the device associated with the module
+(i.e., /dev/ipl).
+.LP
+.PP
+The strcture used with the NAT interface is described below:
+.LP
+.nf
+typedef struct  ipnat   {
+        struct  ipnat   *in_next;
+        void    *in_ifp;
+        u_short in_flags;
+        u_short in_pnext;
+        u_short in_port[2];
+        struct  in_addr in_in[2];
+        struct  in_addr in_out[2];
+        struct  in_addr in_nextip;
+        int     in_space;
+        int     in_redir; /* 0 if it's a mapping, 1 if it's a hard redir */
+        char    in_ifname[IFNAMSIZ];
+} ipnat_t;
+
+#define in_pmin         in_port[0]      /* Also holds static redir port */
+#define in_pmax         in_port[1]
+#define in_nip          in_nextip.s_addr
+#define in_inip         in_in[0].s_addr
+#define in_inmsk        in_in[1].s_addr
+#define in_outip        in_out[0].s_addr
+#define in_outmsk       in_out[1].s_addr
+
+.fi
+.PP
+Recognised values for in_redir:
+.LP
+.nf
+#define NAT_MAP         0
+#define NAT_REDIRECT    1
+.fi
+.PP
+.LP
+\fBNAT statistics\fP
+Statistics on the the number of packets mapped, going in and out are kept,
+the number of times a new entry is added and deleted (through expiration) to
+the NAT table and the current usage level of the NAT table.
+.PP
+Pointers to the NAT table inside the kernel, as well as to the top of the
+internal NAT lists constructed with the \fBSIOCADNAT\fP ioctls.  The table
+itself is a hash table of size NAT_SIZE (default size is 367).
+.PP
+To retrieve the statistics, the \fBSIOCGNATS\fP ioctl must be used, with
+the appropriate structure passed by reference, as follows:
+.nf
+	ioctl(fd, SIOCGNATS, struct natstat *)
+
+typedef struct  natstat {
+        u_long  ns_mapped[2];
+        u_long  ns_added;
+        u_long  ns_expire;
+        u_long  ns_inuse;
+        nat_t   ***ns_table;
+        ipnat_t *ns_list;
+} natstat_t;
+.fi
+.SH BUGS
+It would be nice if there were more flexibility when adding and deleting
+filter rules.
+.SH SEE ALSO
+ipfstat(1), ipf(1), ipf(4), ipnat(5)
diff --git a/contrib/ipfilter/man/ipnat.5 b/contrib/ipfilter/man/ipnat.5
new file mode 100644
index 0000000..7832623
--- /dev/null
+++ b/contrib/ipfilter/man/ipnat.5
@@ -0,0 +1,70 @@
+.TH IPNAT 5
+.SH NAME
+ipnat \- IP NAT file format
+.SH DESCRIPTION
+The format for files accepted by ipnat is described by the following grammar:
+.LP
+.nf
+ipmap :: = mapit ifname ipmask "->" ipmask [ mapport ] .
+
+mapit ::= "map" | "rdr" .
+ipmask ::= ip "/" bits | ip "/" mask | ip "netmask" mask .
+mapport ::= "portmap" tcpudp portnumber ":" portnumber .
+
+tcpudp ::= "tcp" | "udp" | "tcp/udp" .
+portnumber ::= number { numbers } .
+ifname ::= 'A' - 'Z' { 'A' - 'Z' } numbers .
+
+numbers ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' .
+.fi
+.PP
+For standard NAT functionality, a rule should start with \fBmap\fP and then
+proceeds to specify the interface for which outgoing packets will have their
+source address rewritten.
+.PP
+Packets which will be rewritten can only be selected by matching the original
+source address.  A netmask must be specified with the IP address.
+.PP
+The address selected for replacing the original is chosen from an IP#/netmask
+pair.  A netmask of all 1's indicating a hostname is valid.  A netmask of
+31 1's (255.255.255.254) is considered invalid as there is no space for
+allocating host IP#'s after consideration for broadcast and network
+addresses.
+.PP
+When remapping TCP and UDP packets, it is also possible to change the source
+port number.  Either TCP or UDP or both can be selected by each rule, with a
+range of port numbers to remap into given as \fBport-number:port-number\fP.
+.SH Examples
+.PP
+To change IP#'s used internally from network 10 into an ISP provided 8 bit
+subnet at 209.1.2.0, the following would be used:
+.LP
+.nf
+map 10.0.0.0/8 -> 209.1.2.0/24
+.fi
+.PP
+The obvious problem here is we're trying to squeeze over 16,000,000 IP
+addresses into a 254 address space.  To increase the scope, remapping for TCP
+and/or UDP, port remapping can be used;
+.LP
+.nf
+map 10.0.0.0/8 -> 209.1.2.0/24 portmap tcp/udp 1025:65000
+.fi
+.PP
+which falls only 527,566 `addresses' short of the space available in network
+10.  If we were to combine these rules, they would need to be specified as
+follows:
+.LP
+.nf
+map 10.0.0.0/8 -> 209.1.2.0/24 portmap tcp/udp 1025:65000
+map 10.0.0.0/8 -> 209.1.2.0/24
+.fi
+.PP
+so that all TCP/UDP packets were port mapped and only other protocols, such as
+ICMP, only have their IP# changed.
+.SH FILES
+/etc/services
+.br
+/etc/hosts
+.SH SEE ALSO
+ipnat(1), ipf(5), ipnat(4)
diff --git a/contrib/ipfilter/misc.c b/contrib/ipfilter/misc.c
new file mode 100644
index 0000000..dc6e92c
--- /dev/null
+++ b/contrib/ipfilter/misc.c
@@ -0,0 +1,85 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip_var.h>
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#include <netinet/ip_icmp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include "ip_fil.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include "ipf.h"
+#include "ipt.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)misc.c	1.3 2/4/96 (C) 1995 Darren Reed";
+static	char	rcsid[] = "$Id: misc.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+void	debug(), verbose();
+
+extern	int	opts;
+
+
+void	printpacket(ip)
+struct	ip	*ip;
+{
+	struct	tcphdr	*tcp;
+
+	tcp = (struct tcphdr *)((char *)ip + (ip->ip_hl << 2));
+	printf("ip %d(%d) %d ", ip->ip_len, ip->ip_hl << 2, ip->ip_p);
+	if (ip->ip_off & 0x1fff)
+		printf("@%d", ip->ip_off << 3);
+	(void)printf(" %s", inet_ntoa(ip->ip_src));
+	if (!(ip->ip_off & 0x1fff))
+		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+			(void)printf(",%d", ntohs(tcp->th_sport));
+	(void)printf(" > ");
+	(void)printf("%s", inet_ntoa(ip->ip_dst));
+	if (!(ip->ip_off & 0x1fff))
+		if (ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP)
+			(void)printf(",%d", ntohs(tcp->th_dport));
+	putchar('\n');
+}
+
+
+void	verbose(fmt, p1, p2, p3, p4, p5, p6, p7, p8, p9)
+char	*fmt, *p1, *p2, *p3, *p4, *p5, *p6, *p7,*p8,*p9;
+{
+	if (opts & OPT_VERBOSE)
+		printf(fmt, p1, p2, p3, p4, p5, p6, p7, p8, p9);
+}
+
+
+void	debug(fmt, p1, p2, p3, p4, p5, p6, p7, p8, p9)
+char	*fmt, *p1, *p2, *p3, *p4, *p5, *p6, *p7,*p8,*p9;
+{
+	if (opts & OPT_DEBUG)
+		printf(fmt, p1, p2, p3, p4, p5, p6, p7, p8, p9);
+}
diff --git a/contrib/ipfilter/mkfilters b/contrib/ipfilter/mkfilters
new file mode 100644
index 0000000..4cd7059
--- /dev/null
+++ b/contrib/ipfilter/mkfilters
@@ -0,0 +1,65 @@
+#!/usr/local/bin/perl
+# for best results, bring up all your interfaces before running this
+open(I, "ifconfig -a|") || die $!;
+while (<I>) {
+	chop;
+	if (/^[a-zA-Z]+\d+:/) {
+		($iface = $_) =~ s/^([a-zA-Z]+\d+).*/$1/;
+		$ifaces{$iface} = $iface;
+		next;
+	}
+	if (/inet/) {
+		if (/\-\-\>/) { # PPP, (SLIP?)
+			($inet{$iface} = $_) =~ s/.*inet ([^ ]+) \-\-\> ([^ ]+).*/$1/;
+			($ppp{$iface} = $_) =~ s/.*inet ([^ ]+) \-\-\> ([^ ]+).*/$2/;
+		} else {
+			($inet{$iface} = $_) =~ s/.*inet ([^ ]+).*/$1/;
+		}
+	}
+	if (/netmask/) {
+		($mask = $_) =~ s/.*netmask ([^ ]+).*/$1/;
+		$mask =~ s/^/0x/ if ($mask =~ /^[0-9a-f]*$/);
+		$netmask{$iface} = $mask;
+	}
+	if (/broadcast/) {
+		($bcast{$iface} = $_) =~ s/.*broadcast ([^ ]+).*/$1/;
+	}
+}
+foreach $i (keys %ifaces) {
+	$net{$i} = $inet{$i}."/".$netmask{$i} if (defined($inet{$i}));
+}
+#
+# print out route suggestions
+#
+print "#\n";
+print "# The following routes should be configured, if not already:\n";
+print "#\n";
+foreach $i (keys %ifaces) {
+	next if (($i =~ /lo/) || !defined($net{$i}) || defined($ppp{$i}));
+	print "# route add $inet{$i} localhost 0\n";
+}
+print "#\n";
+
+#
+# print out some generic filters which people should use somewhere near the top
+#
+print "block in log quick from any to any with ipopts\n";
+print "block in log quick proto tcp from any to any with short\n";
+
+foreach $i (keys %ifaces) {
+	if (!defined($inet{$i})) {
+		next;
+	}
+	if ($i !~ /lo/) {
+		print "block in on $i from 127.0.0.0/8 to any\n";
+		print "block out on $i from 127.0.0.0/8 to any\n";
+		print "block out on $i from any to 127.0.0.0/8\n";
+		print "block in on $i from $inet{$i}/32 to any\n";
+		print "block out on $i from any to $inet{$i}/32\n";
+		foreach $j (keys %ifaces) {
+			if ($i ne $j && $j !~ /^lo/ && defined($net{$j})) {
+				print "block in on $i from $net{$j} to any\n";
+			}
+		}
+	}
+}
diff --git a/contrib/ipfilter/ml_ipl.c b/contrib/ipfilter/ml_ipl.c
new file mode 100644
index 0000000..9c3ec3e
--- /dev/null
+++ b/contrib/ipfilter/ml_ipl.c
@@ -0,0 +1,167 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.  The author accepts no
+ * responsibility and is not changed in any way.
+ *
+ * I hate legaleese, don't you ?
+ */
+/*
+ * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
+ * its own major char number! Way cool patch!
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/file.h>
+#include <sys/conf.h>
+#include <sys/syslog.h>
+#include <sys/buf.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/vnode.h>
+#include <sundev/mbvar.h>
+#include <sun/autoconf.h>
+#include <sun/vddrv.h>
+#if defined(sun4c) || defined(sun4m)
+#include <sun/openprom.h>
+#endif
+
+#ifndef	IPL_NAME
+#define	IPL_NAME	"/dev/ipl"
+#endif
+
+extern	int	iplattach(), iplopen(), iplclose(), iplioctl(), iplread();
+extern	int	nulldev(), iplidentify(), errno;
+
+struct	cdevsw	ipldevsw = 
+{
+	iplopen, iplclose, iplread, nulldev,
+	iplioctl, nulldev, nulldev, nulldev,
+	0, nulldev,
+};
+
+
+struct	dev_ops	ipl_ops = 
+{
+	1,
+	iplidentify,
+	iplattach,
+	iplopen,
+	iplclose,
+	iplread,
+	NULL,		/* write */
+	NULL,		/* strategy */
+	NULL,		/* dump */
+	0,		/* psize */
+        iplioctl,
+	NULL,		/* reset */
+	NULL		/* mmap */
+};
+
+int	ipl_major = 0;
+
+#ifdef sun4m
+struct	vdldrv	vd = 
+{
+	VDMAGIC_PSEUDO,
+	"ipl",
+	&ipl_ops,
+	NULL,
+	&ipldevsw,
+	0,
+	0,
+	NULL,
+	NULL,
+	NULL,
+	0,
+	1,
+};
+#else /* sun4m */
+struct vdldrv vd =
+{
+	VDMAGIC_PSEUDO,	/* magic */
+	"ipl",		/* name */
+#ifdef sun4c
+	&ipl_ops,	/* dev_ops */
+#else
+	NULL,		/* struct mb_ctlr *mb_ctlr */
+	NULL,		/* struct mb_driver *mb_driver */
+	NULL,		/* struct mb_device *mb_device */
+	0,		/* num ctlrs */
+	1,		/* numdevs */
+#endif /* sun4c */
+	NULL,		/* bdevsw */
+	&ipldevsw,	/* cdevsw */
+	0,		/* block major */
+	0,		/* char major */
+};
+#endif /* sun4m */
+
+extern int vd_unuseddev();
+extern struct cdevsw cdevsw[];
+extern int nchrdev;
+
+xxxinit(fc, vdp, vdi, vds)
+u_int	fc;
+struct	vddrv	*vdp;
+caddr_t	vdi;
+struct	vdstat	*vds;
+{
+	struct	vdlinkage *v;
+	int	i;
+
+	switch (fc)
+	{
+	case VDLOAD:
+		while (ipl_major < nchrdev &&
+		       cdevsw[ipl_major].d_open != vd_unuseddev)
+			ipl_major++;
+		if (ipl_major == nchrdev)
+			return ENODEV;
+		vd.Drv_charmajor = ipl_major;
+		vdp->vdd_vdtab = (struct vdlinkage *)&vd;
+		return ipl_attach(vdi);
+	case VDUNLOAD:
+		return unload(vdp, vdi);
+		
+	case VDSTAT:
+		return 0;
+
+	default:
+		return EIO;
+	}
+}
+
+static unload(vdp, vdi)
+	struct vddrv *vdp;
+	struct vdioctl_unload  *vdi;
+{
+	int	i;
+
+	(void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
+	return ipldetach();
+}
+
+
+static	int	ipl_attach(vdi)
+struct	vdioctl_load	*vdi;
+{
+	struct	vnode	*vp;
+	struct	vattr	vattr;
+	int		error = 0, fmode = S_IFCHR|0600;
+
+	(void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
+	vattr_null(&vattr);
+	vattr.va_type = MFTOVT(fmode);
+	vattr.va_mode = (fmode & 07777);
+	vattr.va_rdev = ipl_major<<8;
+
+	error = vn_create(IPL_NAME, UIO_SYSSPACE, &vattr, EXCL, 0, &vp);
+	if (error == 0)
+		VN_RELE(vp);
+	return iplattach(0);
+}
diff --git a/contrib/ipfilter/mln_ipl.c b/contrib/ipfilter/mln_ipl.c
new file mode 100644
index 0000000..08a9c36
--- /dev/null
+++ b/contrib/ipfilter/mln_ipl.c
@@ -0,0 +1,237 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+/*
+ * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
+ * its own major char number! Way cool patch!
+ */
+
+
+#include <sys/param.h>
+
+/*
+ * Post NetBSD 1.2 has the PFIL interface for packet filters.  This turns
+ * on those hooks.  We don't need any special mods with this!
+ */
+#if (defined(NetBSD) && (NetBSD > 199609) && (NetBSD <= 1991011)) || \
+    (defined(NetBSD1_2) && NetBSD1_2 > 1)
+#  define NETBSD_PF
+#endif
+
+#if defined(__FreeBSD__) && (__FreeBSD__ > 1)
+# include <osreldate.h>
+#endif
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/proc.h>
+#include <sys/uio.h>
+#include <sys/kernel.h>
+#include <sys/vnode.h>
+#include <sys/namei.h>
+#include <sys/malloc.h>
+#include <sys/mount.h>
+#include <sys/exec.h>
+#include <sys/mbuf.h>
+#if defined(__NetBSD__) || (defined(__FreeBSD_version) && \
+    (__FreeBSD_version >= 199607))
+#include <net/if.h>
+#include <netinet/in_systm.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#endif
+#ifndef	__NetBSD__
+#include <sys/sysent.h>
+#endif
+#include <sys/lkm.h>
+#include "ipl.h"
+#include "ip_fil.h"
+
+#ifndef	IPL_NAME
+#define	IPL_NAME	"/dev/ipl"
+#endif
+#if !defined(VOP_LEASE) && defined(LEASE_CHECK)
+#define	VOP_LEASE	LEASE_CHECK
+#endif
+
+#ifndef	MIN
+#define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+
+extern	int	lkmenodev(), lkmexists(), lkmdispatch();
+
+extern	int	iplattach(), iplopen(), iplclose(), iplioctl(), ipldetach();
+#ifdef NETBSD_PF
+#include <net/pfil.h>
+#endif
+#ifdef	IPFILTER_LOG
+extern	int	iplread();
+#else
+#ifdef NETBSD_PF
+#define iplread enodev
+#else
+#define	iplread	nodev
+#endif
+#endif
+extern	int	iplidentify();
+
+#ifdef NETBSD_PF
+int        (*fr_checkp) __P((struct ip *, int, struct ifnet *, int, struct mbuf **)) = NULL;
+#endif
+
+static int ipl_unload(), ipl_load();
+#if (defined(NetBSD1_0) && (NetBSD1_0 > 1)) || \
+    (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199511))
+struct	cdevsw	ipldevsw = 
+{
+	iplopen,		/* open */
+	iplclose,		/* close */
+	iplread,		/* read */
+	0,			/* write */
+	iplioctl,		/* ioctl */
+	0,			/* stop */
+	0,			/* tty */
+	0,			/* select */
+	0,			/* mmap */
+	NULL			/* strategy */
+};
+#else
+struct	cdevsw	ipldevsw = 
+{
+	iplopen,		/* open */
+	iplclose,		/* close */
+	iplread,		/* read */
+	(void *)nullop,		/* write */
+	iplioctl,		/* ioctl */
+	(void *)nullop,		/* stop */
+	(void *)nullop,		/* reset */
+	(void *)NULL,		/* tty */
+	(void *)nullop,		/* select */
+	(void *)nullop,		/* mmap */
+	NULL			/* strategy */
+};
+#endif
+static	struct	cdevsw	cdev_sav;
+int	ipl_major = 0;
+
+MOD_DEV(IPL_VERSION, LM_DT_CHAR, -1, &ipldevsw);
+
+extern int vd_unuseddev();
+extern struct cdevsw cdevsw[];
+extern int nchrdev;
+
+static int iplaction(lkmtp, cmd)
+struct lkm_table *lkmtp;
+int cmd;
+{
+	int i;
+	struct lkm_dev *args = lkmtp->private.lkm_dev;
+	int err = 0;
+
+	switch (cmd)
+	{
+	case LKM_E_LOAD :
+		if (lkmexists(lkmtp))
+			return EEXIST;
+
+		for (i = 0; i < nchrdev; i++)
+			if (cdevsw[i].d_open == lkmenodev ||
+			    cdevsw[i].d_open == iplopen)
+				break;
+		if (i == nchrdev) {
+			printf("IP Filter: No free cdevsw slots\n");
+			return ENODEV;
+		}
+
+		ipl_major = i;
+		args->lkm_offset = i;   /* slot in cdevsw[] */
+		printf("IP Filter: loaded into slot %d\n", ipl_major);
+		return ipl_load();
+	case LKM_E_UNLOAD :
+		printf("IP Filter: unloaded from slot %d\n", ipl_major);
+		return ipl_unload();
+	case LKM_E_STAT :
+		break;
+	default:
+		err = EIO;
+		break;
+	}
+	return 0;
+}
+
+
+static int ipl_remove()
+{
+	struct nameidata nd;
+	int error;
+
+	NDINIT(&nd, DELETE, LOCKPARENT, UIO_SYSSPACE, IPL_NAME, curproc);
+	if ((error = namei(&nd)))
+		return (error);
+	VOP_LEASE(nd.ni_vp, curproc, curproc->p_ucred, LEASE_WRITE);
+	VOP_LOCK(nd.ni_vp);
+	VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
+	return VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
+}
+
+
+static int ipl_unload()
+{
+	int error;
+
+	error = ipldetach();
+#ifdef NETBSD_PF
+	pfil_remove_hook(fr_check, PFIL_IN|PFIL_OUT);
+#endif
+	if (!error)
+		error = ipl_remove();
+	return error;
+}
+
+
+static int ipl_load()
+{
+	struct nameidata nd;
+	struct vattr vattr;
+	int error, fmode = S_IFCHR|0600;
+
+	error = iplattach();
+#ifdef NETBSD_PF
+	pfil_add_hook(fr_check, PFIL_IN|PFIL_OUT);
+#endif
+	if (error)
+		return error;
+	(void) ipl_remove();
+	error = 0;
+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE, IPL_NAME, curproc);
+	if (error = namei(&nd))
+		return error;
+	if (nd.ni_vp != NULL) {
+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
+		if (nd.ni_dvp == nd.ni_vp)
+			vrele(nd.ni_dvp);
+		else
+			vput(nd.ni_dvp);
+		vrele(nd.ni_vp);
+		return (EEXIST);
+	}
+	VATTR_NULL(&vattr);
+	vattr.va_type = VCHR;
+	vattr.va_mode = (fmode & 07777);
+	vattr.va_rdev = ipl_major<<8;
+	VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
+	return VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
+}
+
+
+int xxxinit(lkmtp, cmd, ver)
+struct lkm_table *lkmtp;
+int cmd, ver;
+{
+	DISPATCH(lkmtp, cmd, ver, iplaction, iplaction, iplaction);
+}
diff --git a/contrib/ipfilter/mls_ipl.c b/contrib/ipfilter/mls_ipl.c
new file mode 100644
index 0000000..22e2db9
--- /dev/null
+++ b/contrib/ipfilter/mls_ipl.c
@@ -0,0 +1,174 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+/*
+ * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
+ * its own major char number! Way cool patch!
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/file.h>
+#include <sys/conf.h>
+#include <sys/syslog.h>
+#include <sys/buf.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/vnode.h>
+#include <sundev/mbvar.h>
+#include <sun/autoconf.h>
+#include <sun/vddrv.h>
+#if defined(sun4c) || defined(sun4m)
+# include <sun/openprom.h>
+#endif
+#include "ipl.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)mls_ipl.c	2.6 10/15/95 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: mls_ipl.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+#ifndef	IPL_NAME
+#define	IPL_NAME	"/dev/ipl"
+#endif
+
+extern	int	iplattach(), iplopen(), iplclose(), iplioctl(), ipldetach();
+#ifdef	IPFILTER_LOG
+extern	int	iplread();
+#else
+#define	iplread	nulldev
+#endif
+extern	int	nulldev(), iplidentify(), errno;
+
+static	int	unload(), ipl_attach();
+
+struct	cdevsw	ipldevsw = 
+{
+	iplopen, iplclose, iplread, nulldev,
+	iplioctl, nulldev, nulldev, nulldev,
+	0, nulldev,
+};
+
+
+struct	dev_ops	ipl_ops = 
+{
+	1,
+	iplidentify,
+	iplattach,
+	iplopen,
+	iplclose,
+	iplread,
+	NULL,		/* write */
+	NULL,		/* strategy */
+	NULL,		/* dump */
+	0,		/* psize */
+        iplioctl,
+	NULL,		/* reset */
+	NULL		/* mmap */
+};
+
+int	ipl_major = 0;
+
+#ifdef sun4m
+struct	vdldrv	vd = 
+{
+	VDMAGIC_PSEUDO,
+	IPL_VERSION,
+	&ipl_ops,
+	NULL,
+	&ipldevsw,
+	0,
+	0,
+	NULL,
+	NULL,
+	NULL,
+	0,
+	1,
+};
+#else /* sun4m */
+struct vdldrv vd =
+{
+	VDMAGIC_PSEUDO,	/* magic */
+	IPL_VERSION,
+#ifdef sun4c
+	&ipl_ops,	/* dev_ops */
+#else
+	NULL,		/* struct mb_ctlr *mb_ctlr */
+	NULL,		/* struct mb_driver *mb_driver */
+	NULL,		/* struct mb_device *mb_device */
+	0,		/* num ctlrs */
+	1,		/* numdevs */
+#endif /* sun4c */
+	NULL,		/* bdevsw */
+	&ipldevsw,	/* cdevsw */
+	0,		/* block major */
+	0,		/* char major */
+};
+#endif /* sun4m */
+
+extern int vd_unuseddev();
+extern struct cdevsw cdevsw[];
+extern int nchrdev;
+
+xxxinit(fc, vdp, vdi, vds)
+u_int	fc;
+struct	vddrv	*vdp;
+caddr_t	vdi;
+struct	vdstat	*vds;
+{
+	switch (fc)
+	{
+	case VDLOAD:
+		while (ipl_major < nchrdev &&
+		       cdevsw[ipl_major].d_open != vd_unuseddev)
+			ipl_major++;
+		if (ipl_major == nchrdev)
+			return ENODEV;
+		vd.Drv_charmajor = ipl_major;
+		vdp->vdd_vdtab = (struct vdlinkage *)&vd;
+		return ipl_attach();
+	case VDUNLOAD:
+		return unload();
+	case VDSTAT:
+		return 0;
+	default:
+		return EIO;
+	}
+}
+
+static	int	unload()
+{
+	int err;
+
+	err = ipldetach();
+	if (!err)
+		(void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
+	return err;
+}
+
+
+static	int	ipl_attach()
+{
+	struct	vnode	*vp;
+	struct	vattr	vattr;
+	int		error = 0, fmode = S_IFCHR|0600;
+
+	error = iplattach();
+	if (error)
+		return error;
+	(void) vn_remove(IPL_NAME, UIO_SYSSPACE, FILE);
+	vattr_null(&vattr);
+	vattr.va_type = MFTOVT(fmode);
+	vattr.va_mode = (fmode & 07777);
+	vattr.va_rdev = ipl_major<<8;
+
+	error = vn_create(IPL_NAME, UIO_SYSSPACE, &vattr, EXCL, 0, &vp);
+	if (error == 0)
+		VN_RELE(vp);
+	return error;
+}
diff --git a/contrib/ipfilter/opt.c b/contrib/ipfilter/opt.c
new file mode 100644
index 0000000..4576b55
--- /dev/null
+++ b/contrib/ipfilter/opt.c
@@ -0,0 +1,134 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#include <net/if.h>
+#include "ip_compat.h"
+#include "ipf.h"
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] = "@(#)opt.c	1.8 4/10/96 (C) 1993-1995 Darren Reed";
+static	char	rcsid[] = "$Id: opt.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+extern	int	opts;
+
+struct	ipopt_names	ionames[] ={
+	{ IPOPT_NOP,	0x000001,	1,	"nop" },
+	{ IPOPT_RR,	0x000002,	7,	"rr" },		/* 1 route */
+	{ IPOPT_ZSU,	0x000004,	3,	"zsu" },
+	{ IPOPT_MTUP,	0x000008,	3,	"mtup" },
+	{ IPOPT_MTUR,	0x000010,	3,	"mtur" },
+	{ IPOPT_ENCODE,	0x000020,	3,	"encode" },
+	{ IPOPT_TS,	0x000040,	8,	"ts" },		/* 1 TS */
+	{ IPOPT_TR,	0x000080,	3,	"tr" },
+	{ IPOPT_SECURITY,0x000100,	11,	"sec" },
+	{ IPOPT_SECURITY,0x000100,	11,	"sec-class" },
+	{ IPOPT_LSRR,	0x000200,	7,	"lsrr" },	/* 1 route */
+	{ IPOPT_E_SEC,	0x000400,	3,	"e-sec" },
+	{ IPOPT_CIPSO,	0x000800,	3,	"cipso" },
+	{ IPOPT_SATID,	0x001000,	4,	"satid" },
+	{ IPOPT_SSRR,	0x002000,	7,	"ssrr" },	/* 1 route */
+	{ IPOPT_ADDEXT,	0x004000,	3,	"addext" },
+	{ IPOPT_VISA,	0x008000,	3,	"visa" },
+	{ IPOPT_IMITD,	0x010000,	3,	"imitd" },
+	{ IPOPT_EIP,	0x020000,	3,	"eip" },
+	{ IPOPT_FINN,	0x040000,	3,	"finn" },
+	{ 0, 		0,	0,	(char *)NULL }     /* must be last */
+};
+
+struct	ipopt_names	secclass[] = {
+	{ IPSO_CLASS_RES4,	0x01,	0, "reserv-4" },
+	{ IPSO_CLASS_TOPS,	0x02,	0, "topsecret" },
+	{ IPSO_CLASS_SECR,	0x04,	0, "secret" },
+	{ IPSO_CLASS_RES3,	0x08,	0, "reserv-3" },
+	{ IPSO_CLASS_CONF,	0x10,	0, "confid" },
+	{ IPSO_CLASS_UNCL,	0x20,	0, "unclass" },
+	{ IPSO_CLASS_RES2,	0x40,	0, "reserv-2" },
+	{ IPSO_CLASS_RES1,	0x80,	0, "reserv-1" },
+	{ 0, 0, 0, NULL }	/* must be last */
+};
+
+
+static u_char seclevel(slevel)
+char *slevel;
+{
+	struct ipopt_names *so;
+
+	for (so = secclass; so->on_name; so++)
+		if (!strcasecmp(slevel, so->on_name))
+			break;
+
+	if (!so->on_name) {
+		fprintf(stderr, "no such security level: %s\n", slevel);
+		return 0;
+	}
+	return (u_char)so->on_value;
+}
+
+
+u_long buildopts(cp, op)
+char *cp, *op;
+{
+	struct ipopt_names *io;
+	u_char lvl;
+	u_long msk = 0;
+	char *s, *t;
+	int len = 0;
+
+	for (s = strtok(cp, ","); s; s = strtok(NULL, ",")) {
+		if ((t = strchr(s, '=')))
+			*t++ = '\0';
+		for (io = ionames; io->on_name; io++) {
+			if (strcasecmp(s, io->on_name) || (msk & io->on_bit))
+				continue;
+			if ((len + io->on_siz) > 48) {
+				fprintf(stderr, "options too long\n");
+				return 0;
+			}
+			len += io->on_siz;
+			*op++ = io->on_value;
+			if (io->on_siz > 1) {
+				*op++ = io->on_siz;
+				*op++ = IPOPT_MINOFF;
+
+				if (t && !strcasecmp(s, "sec-class")) {
+					lvl = seclevel(t);
+					*(op - 1) = lvl;
+				}
+				op += io->on_siz - 3;
+				if (len & 3) {
+					*op++ = IPOPT_NOP;
+					len++;
+				}
+			}
+			if (opts & OPT_DEBUG)
+				fprintf(stderr, "bo: %s %d %#x: %d\n",
+					io->on_name, io->on_value,
+					io->on_bit, len);
+			msk |= io->on_bit;
+			break;
+		}
+		if (!io->on_name) {
+			fprintf(stderr, "unknown IP option name %s\n", s);
+			return 0;
+		}
+	}
+	*op++ = IPOPT_EOL;
+	len++;
+	return len;
+}
diff --git a/contrib/ipfilter/parse.c b/contrib/ipfilter/parse.c
new file mode 100644
index 0000000..1c463e8
--- /dev/null
+++ b/contrib/ipfilter/parse.c
@@ -0,0 +1,1249 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+#include <stdio.h>
+#include <string.h>
+#if !defined(__SVR4) && !defined(__svr4__)
+#include <strings.h>
+#else
+#include <sys/byteorder.h>
+#endif
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stddef.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/tcp.h>
+#include <net/if.h>
+#include "ip_fil.h"
+#include <netdb.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+#include "ipf.h"
+#include <ctype.h>
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static	char	sccsid[] ="@(#)parse.c	1.44 6/5/96 (C) 1993-1996 Darren Reed";
+static	char	rcsid[] = "$Id: parse.c,v 2.0.1.1 1997/01/09 15:14:44 darrenr Exp $";
+#endif
+
+extern	struct	ipopt_names	ionames[], secclass[];
+extern	int	opts;
+extern	int	gethostname();
+
+u_long	hostnum(), optname();
+u_short	portnum();
+u_char	tcp_flags();
+struct	frentry	*parse();
+void	binprint(), printfr();
+int	addicmp(), extras(), hostmask(), ports(), icmpcode(), addkeep();
+int	to_interface();
+
+
+char	*proto = NULL;
+char	flagset[] = "FSRPAU";
+u_char	flags[] = { TH_FIN, TH_SYN, TH_RST, TH_PUSH, TH_ACK, TH_URG };
+
+static	char	thishost[64];
+
+
+void initparse()
+{
+	gethostname(thishost, sizeof(thishost));
+	thishost[sizeof(thishost) - 1] = '\0';
+}
+
+
+/* parse()
+ *
+ * parse a line read from the input filter rule file
+ */
+struct	frentry	*parse(line)
+char	*line;
+{
+	static	struct	frentry	fil;
+	struct	protoent	*p = NULL;
+	char	*cps[31], **cpp;
+	u_char	ch;
+	int	i, cnt = 1;
+
+	while (*line && isspace(*line))
+		line++;
+	if (!*line)
+		return NULL;
+
+	bzero((char *)&fil, sizeof(fil));
+	fil.fr_mip.fi_v = 0xf;
+	fil.fr_ip.fi_v = 4;
+	/*
+	 * break line up into max of 20 segments
+	 */
+	if (opts & OPT_DEBUG)
+		fprintf(stderr, "parse [%s]\n", line);
+	for (i = 0, *cps = strtok(line, " \b\t\r\n"); cps[i] && i < 30; cnt++)
+		cps[++i] = strtok(NULL, " \b\t\r\n");
+	cps[i] = NULL;
+
+	if (cnt < 3) {
+		(void)fprintf(stderr,"not enough segments in line\n");
+		return NULL;
+	}
+
+	cpp = cps;
+	if (**cpp == '@')
+		fil.fr_hits = atoi(*cpp++ + 1) + 1;
+
+	if (!strcasecmp("block", *cpp)) {
+		fil.fr_flags = FR_BLOCK;
+		if (!strncasecmp(*(cpp+1), "return-icmp", 11)) {
+			fil.fr_flags |= FR_RETICMP;
+			cpp++;
+			if (*(*cpp + 11) == '(') {
+				fil.fr_icode = icmpcode(*cpp + 12);
+				if (fil.fr_icode == -1) {
+					fprintf(stderr,
+						"uncrecognised icmp code %s\n",
+						*cpp + 12);
+					return NULL;
+				}
+			}
+		} else if (!strncasecmp(*(cpp+1), "return-rst", 10)) {
+			fil.fr_flags |= FR_RETRST;
+			cpp++;
+		}
+	} else if (!strcasecmp("count", *cpp)) {
+		fil.fr_flags = FR_ACCOUNT;
+	} else if (!strcasecmp("pass", *cpp)) {
+		fil.fr_flags = FR_PASS;
+	} else if (!strcasecmp("log", *cpp)) {
+		fil.fr_flags = FR_LOG;
+		if (!strcasecmp(*(cpp+1), "body")) {
+			fil.fr_flags |= FR_LOGBODY;
+			cpp++;
+		}
+		if (!strcasecmp(*(cpp+1), "first")) {
+			fil.fr_flags |= FR_LOGFIRST;
+			cpp++;
+		}
+	} else {
+		/*
+		 * Doesn't start with one of the action words
+		 */
+		(void)fprintf(stderr, "unknown keyword (%s)\n", *cpp);
+		return NULL;
+	}
+	cpp++;
+
+	if (!strcasecmp("in", *cpp))
+		fil.fr_flags |= FR_INQUE;
+	else if (!strcasecmp("out", *cpp))
+		fil.fr_flags |= FR_OUTQUE;
+	else {
+		(void)fprintf(stderr,
+			"missing 'in'/'out' keyword (%s)\n", *cpp);
+		return NULL;
+	}
+	if (!*++cpp)
+		return NULL;
+
+	if (!strcasecmp("log", *cpp)) {
+		cpp++;
+		if (fil.fr_flags & FR_PASS)
+			fil.fr_flags |= FR_LOGP;
+		else if (fil.fr_flags & FR_BLOCK)
+			fil.fr_flags |= FR_LOGB;
+		if (!strcasecmp(*cpp, "body")) {
+			fil.fr_flags |= FR_LOGBODY;
+			cpp++;
+		}
+		if (!strcasecmp(*cpp, "first")) {
+			fil.fr_flags |= FR_LOGFIRST;
+			cpp++;
+		}
+		if (!strcasecmp(*cpp, "or-block")) {
+			if (!(fil.fr_flags & FR_PASS)) {
+				(void)fprintf(stderr,
+					"or-block must be used with pass\n");
+				return NULL;
+			}
+			fil.fr_flags |= FR_LOGORBLOCK;
+			cpp++;
+		}
+	}
+
+	if (!strcasecmp("quick", *cpp)) {
+		cpp++;
+		fil.fr_flags |= FR_QUICK;
+	}
+
+	*fil.fr_ifname = '\0';
+	if (*cpp && !strcasecmp(*cpp, "on")) {
+		if (!*++cpp) {
+			(void)fprintf(stderr, "interface name missing\n");
+			return NULL;
+		}
+		(void)strncpy(fil.fr_ifname, *cpp, IFNAMSIZ-1);
+		fil.fr_ifname[IFNAMSIZ-1] = '\0';
+		cpp++;
+		if (!*cpp) {
+			if (fil.fr_flags & FR_RETRST) {
+				(void)fprintf(stderr,
+					"%s can only be used with TCP\n",
+					"return-rst");
+				return NULL;
+			}
+			return &fil;
+		}
+
+		if (*cpp) {
+			if (!strcasecmp(*cpp, "dup-to") && *(cpp + 1)) {
+				cpp++;
+				if (to_interface(&fil.fr_dif, *cpp))
+					return NULL;
+				cpp++;
+			}
+			if (!strcasecmp(*cpp, "to") && *(cpp + 1)) {
+				cpp++;
+				if (to_interface(&fil.fr_tif, *cpp))
+					return NULL;
+				cpp++;
+			} else if (!strcasecmp(*cpp, "fastroute")) {
+				fil.fr_flags |= FR_FASTROUTE;
+				cpp++;
+			}
+		}
+	}
+	if (*cpp && !strcasecmp(*cpp, "tos")) {
+		if (!*++cpp) {
+			(void)fprintf(stderr, "tos missing value\n");
+			return NULL;
+		}
+		fil.fr_tos = strtol(*cpp, NULL, 0);
+		fil.fr_mip.fi_tos = 0xff;
+		cpp++;
+	}
+
+	if (*cpp && !strcasecmp(*cpp, "ttl")) {
+		if (!*++cpp) {
+			(void)fprintf(stderr, "ttl missing hopcount value\n");
+			return NULL;
+		}
+		fil.fr_ttl = atoi(*cpp);
+		fil.fr_mip.fi_ttl = 0xff;
+		cpp++;
+	}
+
+	/*
+	 * check for "proto <protoname>" only decode udp/tcp/icmp as protoname
+	 */
+	proto = NULL;
+	if (*cpp && !strcasecmp(*cpp, "proto")) {
+		if (!*++cpp) {
+			(void)fprintf(stderr, "protocol name missing\n");
+			return NULL;
+		}
+		if (!strcasecmp(*cpp, "tcp/udp")) {
+			fil.fr_ip.fi_fl |= FI_TCPUDP;
+			fil.fr_mip.fi_fl |= FI_TCPUDP;
+		} else {
+			if (!(p = getprotobyname(*cpp)) && !isdigit(**cpp)) {
+				(void)fprintf(stderr,
+					"unknown protocol (%s)\n", *cpp);
+				return NULL;
+			}
+			if (p)
+				fil.fr_proto = p->p_proto;
+			else if (isdigit(**cpp))
+				fil.fr_proto = atoi(*cpp);
+			fil.fr_mip.fi_p = 0xff;
+		}
+		proto = *cpp;
+		if (fil.fr_proto != IPPROTO_TCP && fil.fr_flags & FR_RETRST) {
+			(void)fprintf(stderr,
+				"%s can only be used with TCP\n",
+				"return-rst");
+			return NULL;
+		}
+		if (!*++cpp)
+			return &fil;
+	}
+	if (fil.fr_proto != IPPROTO_TCP && fil.fr_flags & FR_RETRST) {
+		(void)fprintf(stderr, "%s can only be used with TCP\n",
+			"return-rst");
+		return NULL;
+	}
+
+	/*
+	 * get the from host and bit mask to use against packets
+	 */
+
+	if (!*cpp) {
+		fprintf(stderr, "missing source specification\n");
+		return NULL;
+	}
+	if (!strcasecmp(*cpp, "all")) {
+		cpp++;
+		if (!*cpp)
+			return &fil;
+	} else {
+		if (strcasecmp(*cpp, "from")) {
+			(void)fprintf(stderr,
+				"unexpected keyword (%s) - from\n", *cpp);
+			return NULL;
+		}
+		if (!*++cpp) {
+			(void)fprintf(stderr, "missing host after from\n");
+			return NULL;
+		}
+		ch = 0;
+		if (hostmask(&cpp, &fil.fr_src, &fil.fr_smsk,
+			     &fil.fr_sport, &ch, &fil.fr_stop)) {
+			(void)fprintf(stderr, "bad host (%s)\n", *cpp);
+			return NULL;
+		}
+		fil.fr_scmp = ch;
+		if (!*cpp) {
+			(void)fprintf(stderr, "missing to fields\n");
+			return NULL;
+		}
+
+		/*
+		 * do the same for the to field (destination host)
+		 */
+		if (strcasecmp(*cpp, "to")) {
+			(void)fprintf(stderr,
+				"unexpected keyword (%s) - to\n", *cpp);
+			return NULL;
+		}
+		if (!*++cpp) {
+			(void)fprintf(stderr, "missing host after to\n");
+			return NULL;
+		}
+		ch = 0;
+		if (hostmask(&cpp, &fil.fr_dst, &fil.fr_dmsk,
+			     &fil.fr_dport, &ch, &fil.fr_dtop)) {
+			(void)fprintf(stderr, "bad host (%s)\n", *cpp);
+			return NULL;
+		}
+		fil.fr_dcmp = ch;
+	}
+
+	/*
+	 * check some sanity, make sure we don't have icmp checks with tcp
+	 * or udp or visa versa.
+	 */
+	if (fil.fr_proto && (fil.fr_dcmp || fil.fr_scmp) &&
+	    fil.fr_proto != IPPROTO_TCP && fil.fr_proto != IPPROTO_UDP) {
+		(void)fprintf(stderr, "port operation on non tcp/udp\n");
+		return NULL;
+	}
+	if (fil.fr_icmp && fil.fr_proto != IPPROTO_ICMP) {
+		(void)fprintf(stderr, "icmp comparisons on wrong protocol\n");
+		return NULL;
+	}
+
+	if (!*cpp)
+		return &fil;
+
+	if (*cpp && !strcasecmp(*cpp, "flags")) {
+		if (!*++cpp) {
+			(void)fprintf(stderr, "no flags present\n");
+			return NULL;
+		}
+		fil.fr_tcpf = tcp_flags(*cpp, &fil.fr_tcpfm);
+		cpp++;
+	}
+
+	/*
+	 * extras...
+	 */
+	if (*cpp && (!strcasecmp(*cpp, "with") || !strcasecmp(*cpp, "and")))
+		if (extras(&cpp, &fil))
+			return NULL;
+
+	/*
+	 * icmp types for use with the icmp protocol
+	 */
+	if (*cpp && !strcasecmp(*cpp, "icmp-type")) {
+		if (fil.fr_proto != IPPROTO_ICMP) {
+			(void)fprintf(stderr,
+				"icmp with wrong protocol (%d)\n",
+				fil.fr_proto);
+			return NULL;
+		}
+		if (addicmp(&cpp, &fil))
+			return NULL;
+		fil.fr_icmp = htons(fil.fr_icmp);
+		fil.fr_icmpm = htons(fil.fr_icmpm);
+	}
+
+	/*
+	 * Keep something...
+	 */
+	while (*cpp && !strcasecmp(*cpp, "keep"))
+		if (addkeep(&cpp, &fil))
+			return NULL;
+
+	/*
+	 * leftovers...yuck
+	 */
+	if (*cpp && **cpp) {
+		fprintf(stderr, "unknown words at end: [");
+		for (; *cpp; cpp++)
+			(void)fprintf(stderr, "%s ", *cpp);
+		(void)fprintf(stderr, "]\n");
+		return NULL;
+	}
+
+	/*
+	 * lazy users...
+	 */
+	if (!fil.fr_proto && (fil.fr_dcmp || fil.fr_scmp || fil.fr_tcpf)) {
+		(void)fprintf(stderr,
+			"no protocol given for TCP/UDP comparisons\n");
+		return NULL;
+	}
+/*
+	if ((fil.fr_flags & FR_KEEPFRAG) &&
+	    (!(fil.fr_ip.fi_fl & FI_FRAG) || !(fil.fr_ip.fi_fl & FI_FRAG))) {
+		(void)fprintf(stderr,
+			"must use 'with frags' with 'keep frags'\n");
+		return NULL;
+	}
+*/
+	return &fil;
+}
+
+
+int to_interface(fdp, to)
+frdest_t *fdp;
+char *to;
+{
+	int	r = 0;
+	char	*s;
+
+	s = index(to, ':');
+	fdp->fd_ifp = NULL;
+	if (s) {
+		*s++ = '\0';
+		fdp->fd_ip.s_addr = hostnum(s, &r);
+		if (r == -1)
+			return -1;
+	}
+	(void) strncpy(fdp->fd_ifname, to, sizeof(fdp->fd_ifname) - 1);
+	fdp->fd_ifname[sizeof(fdp->fd_ifname) - 1] = '\0';
+	return 0;
+}
+
+
+void print_toif(tag, fdp)
+char *tag;
+frdest_t *fdp;
+{
+	(void)printf("%s %s%s", tag, fdp->fd_ifname,
+		     (fdp->fd_ifp || (int)fdp->fd_ifp == -1) ? "" : "(!)");
+	if (fdp->fd_ip.s_addr)
+		(void)printf(":%s", inet_ntoa(fdp->fd_ip));
+	putchar(' ');
+}
+
+
+/*
+ * returns false if neither "hostmask/num" or "hostmask mask addr" are
+ * found in the line segments
+ */
+int	hostmask(seg, sa, msk, pp, cp, tp)
+char	***seg;
+u_long	*sa, *msk;
+u_short	*pp, *tp;
+u_char	*cp;
+{
+	char	*s;
+	int	bits = -1, resolved;
+
+	/*
+	 * is it possibly hostname/num ?
+	 */
+	if ((s = index(**seg, '/'))) {
+		*s++ = '\0';
+		if (!isdigit(*s))
+			return -1;
+		if (index(s, '.'))
+			*msk = inet_addr(s);
+		if (!index(s, '.') && !index(s, 'x')) {
+			/*
+			 * set x most significant bits
+			 */
+			for (bits = atoi(s); bits; bits--) {
+				*msk /= 2;
+				*msk |= ntohl(inet_addr("128.0.0.0"));
+			}
+			*msk = htonl(*msk);
+		} else {
+			if (inet_aton(s, (struct in_addr *)msk) == -1)
+				return -1;
+		}
+		*sa = hostnum(**seg, &resolved) & *msk;
+		if (resolved == -1)
+			return -1;
+		(*seg)++;
+		return ports(seg, pp, cp, tp);
+	}
+
+	/*
+	 * look for extra segments if "mask" found in right spot
+	 */
+	if (*(*seg+1) && *(*seg+2) && !strcasecmp(*(*seg+1), "mask")) {
+		*sa = hostnum(**seg, &resolved);
+		if (resolved == -1)
+			return -1;
+		(*seg)++;
+		(*seg)++;
+		if (inet_aton(**seg, (struct in_addr *)msk) == -1)
+			return -1;
+		(*seg)++;
+		*sa &= *msk;
+		return ports(seg, pp, cp, tp);
+	}
+
+	if (**seg) {
+		*sa = hostnum(**seg, &resolved);
+		if (resolved == -1)
+			return -1;
+		(*seg)++;
+		*msk = (*sa ? inet_addr("255.255.255.255") : 0L);
+		*sa &= *msk;
+		return ports(seg, pp, cp, tp);
+	}
+	return -1;
+}
+
+/*
+ * returns an ip address as a long var as a result of either a DNS lookup or
+ * straight inet_addr() call
+ */
+u_long	hostnum(host, resolved)
+char	*host;
+int	*resolved;
+{
+	struct	hostent	*hp;
+	struct	netent	*np;
+
+	*resolved = 0;
+	if (!strcasecmp("any",host))
+		return 0L;
+	if (isdigit(*host))
+		return inet_addr(host);
+	if (!strcasecmp("<thishost>", host))
+		host = thishost;
+
+	if (!(hp = gethostbyname(host))) {
+		if (!(np = getnetbyname(host))) {
+			*resolved = -1;
+			fprintf(stderr, "can't resolve hostname: %s\n", host);
+			return 0;
+		}
+		return np->n_net;
+	}
+	return *(u_long *)hp->h_addr;
+}
+
+/*
+ * check for possible presence of the port fields in the line
+ */
+int	ports(seg, pp, cp, tp)
+char	***seg;
+u_short	*pp, *tp;
+u_char	*cp;
+{
+	int	comp = -1;
+
+	if (!*seg || !**seg || !***seg)
+		return 0;
+	if (!strcasecmp(**seg, "port") && *(*seg + 1) && *(*seg + 2)) {
+		(*seg)++;
+		if (isdigit(***seg) && *(*seg + 2)) {
+			*pp = portnum(**seg);
+			(*seg)++;
+			if (!strcmp(**seg, "<>"))
+				comp = FR_OUTRANGE;
+			else if (!strcmp(**seg, "><"))
+				comp = FR_INRANGE;
+			(*seg)++;
+			*tp = portnum(**seg);
+		} else if (!strcmp(**seg, "=") || !strcasecmp(**seg, "eq"))
+			comp = FR_EQUAL;
+		else if (!strcmp(**seg, "!=") || !strcasecmp(**seg, "ne"))
+			comp = FR_NEQUAL;
+		else if (!strcmp(**seg, "<") || !strcasecmp(**seg, "lt"))
+			comp = FR_LESST;
+		else if (!strcmp(**seg, ">") || !strcasecmp(**seg, "gt"))
+			comp = FR_GREATERT;
+		else if (!strcmp(**seg, "<=") || !strcasecmp(**seg, "le"))
+			comp = FR_LESSTE;
+		else if (!strcmp(**seg, ">=") || !strcasecmp(**seg, "ge"))
+			comp = FR_GREATERTE;
+		else {
+			(void)fprintf(stderr,"unknown comparator (%s)\n",
+					**seg);
+			return -1;
+		}
+		if (comp != FR_OUTRANGE && comp != FR_INRANGE) {
+			(*seg)++;
+			*pp = portnum(**seg);
+		}
+		*cp = comp;
+		(*seg)++;
+	}
+	return 0;
+}
+
+/*
+ * find the port number given by the name, either from getservbyname() or
+ * straight atoi()
+ */
+u_short	portnum(name)
+char	*name;
+{
+	struct	servent	*sp, *sp2;
+	u_short	p1 = 0;
+
+	if (isdigit(*name))
+		return (u_short)atoi(name);
+	if (!proto)
+		proto = "tcp/udp";
+	if (strcasecmp(proto, "tcp/udp")) {
+		sp = getservbyname(name, proto);
+		if (sp)
+			return ntohs(sp->s_port);
+		(void) fprintf(stderr, "unknown service \"%s\".\n", name);
+		return 0;
+	}
+	sp = getservbyname(name, "tcp");
+	if (sp)
+		p1 = sp->s_port;
+	sp2 = getservbyname(name, "udp");
+	if (!sp || !sp2) {
+		(void) fprintf(stderr, "unknown tcp/udp service \"%s\".\n",
+			name);
+		return 0;
+	}
+	if (p1 != sp2->s_port) {
+		(void) fprintf(stderr, "%s %d/tcp is a different port to ",
+			name, p1);
+		(void) fprintf(stderr, "%s %d/udp\n", name, sp->s_port);
+		return 0;
+	}
+	return ntohs(p1);
+}
+
+
+u_char tcp_flags(flgs, mask)
+char *flgs;
+u_char *mask;
+{
+	u_char tcpf = 0, tcpfm = 0, *fp = &tcpf;
+	char *s, *t;
+
+	for (s = flgs; *s; s++) {
+		if (*s == '/' && fp == &tcpf) {
+			fp = &tcpfm;
+			continue;
+		}
+		if (!(t = index(flagset, *s))) {
+			(void)fprintf(stderr, "unknown flag (%c)\n", *s);
+			return 0;
+		}
+		*fp |= flags[t - flagset];
+	}
+	if (!tcpfm)
+		tcpfm = 0xff;
+	*mask = tcpfm;
+	return tcpf;
+}
+
+
+/*
+ * deal with extra bits on end of the line
+ */
+int	extras(cp, fr)
+char	***cp;
+struct	frentry	*fr;
+{
+	u_short	secmsk;
+	u_long	opts;
+	int	notopt;
+	char	oflags;
+
+	opts = 0;
+	secmsk = 0;
+	notopt = 0;
+	(*cp)++;
+	if (!**cp)
+		return -1;
+
+	while (**cp && (!strncasecmp(**cp, "ipopt", 5) ||
+	       !strncasecmp(**cp, "not", 3) || !strncasecmp(**cp, "opt", 4) ||
+	       !strncasecmp(**cp, "frag", 3) || !strncasecmp(**cp, "no", 2) ||
+	       !strncasecmp(**cp, "short", 5))) {
+		if (***cp == 'n' || ***cp == 'N') {
+			notopt = 1;
+			(*cp)++;
+			continue;
+		} else if (***cp == 'i' || ***cp == 'I') {
+			if (!notopt)
+				fr->fr_ip.fi_fl |= FI_OPTIONS;
+			fr->fr_mip.fi_fl |= FI_OPTIONS;
+			goto nextopt;
+		} else if (***cp == 'f' || ***cp == 'F') {
+			if (!notopt)
+				fr->fr_ip.fi_fl |= FI_FRAG;
+			fr->fr_mip.fi_fl |= FI_FRAG;
+			goto nextopt;
+		} else if (***cp == 'o' || ***cp == 'O') {
+			if (!*(*cp + 1)) {
+				(void)fprintf(stderr,
+					"opt missing arguements\n");
+				return -1;
+			}
+			(*cp)++;
+			if (!(opts = optname(cp, &secmsk)))
+				return -1;
+			oflags = FI_OPTIONS;
+		} else if (***cp == 's' || ***cp == 'S') {
+			if (fr->fr_tcpf) {
+				(void) fprintf(stderr,
+				    "short cannot be used with TCP flags\n");
+				return -1;
+			}
+
+			if (!notopt)
+				fr->fr_ip.fi_fl |= FI_SHORT;
+			fr->fr_mip.fi_fl |= FI_SHORT;
+			goto nextopt;
+		} else
+			return -1;
+
+		if (!notopt || !opts)
+			fr->fr_mip.fi_fl |= oflags;
+		if (notopt)
+			if (!secmsk)
+				fr->fr_mip.fi_optmsk |= opts;
+			else
+				fr->fr_mip.fi_optmsk |= (opts & ~0x0100);
+		else
+				fr->fr_mip.fi_optmsk |= opts;
+		fr->fr_mip.fi_secmsk |= secmsk;
+
+		if (notopt) {
+			fr->fr_ip.fi_fl &= (~oflags & 0xf);
+			fr->fr_ip.fi_optmsk &= ~opts;
+			fr->fr_ip.fi_secmsk &= ~secmsk;
+		} else {
+			fr->fr_ip.fi_fl |= oflags;
+			fr->fr_ip.fi_optmsk |= opts;
+			fr->fr_ip.fi_secmsk |= secmsk;
+		}
+nextopt:
+		notopt = 0;
+		opts = 0;
+		oflags = 0;
+		secmsk = 0;
+		(*cp)++;
+	}
+	return 0;
+}
+
+
+u_long optname(cp, sp)
+char ***cp;
+u_short *sp;
+{
+	struct ipopt_names *io, *so;
+	u_long msk = 0;
+	u_short smsk = 0;
+	char *s;
+	int sec = 0;
+
+	for (s = strtok(**cp, ","); s; s = strtok(NULL, ",")) {
+		for (io = ionames; io->on_name; io++)
+			if (!strcasecmp(s, io->on_name)) {
+				msk |= io->on_bit;
+				break;
+			}
+		if (!io->on_name) {
+			fprintf(stderr, "unknown IP option name %s\n", s);
+			return 0;
+		}
+		if (!strcasecmp(s, "sec-class"))
+			sec = 1;
+	}
+
+	if (sec && !*(*cp + 1)) {
+		fprintf(stderr, "missing security level after sec-class\n");
+		return 0;
+	}
+
+	if (sec) {
+		(*cp)++;
+		for (s = strtok(**cp, ","); s; s = strtok(NULL, ",")) {
+			for (so = secclass; so->on_name; so++)
+				if (!strcasecmp(s, so->on_name)) {
+					smsk |= so->on_bit;
+					break;
+				}
+			if (!so->on_name) {
+				fprintf(stderr, "no such security level: %s\n",
+					s);
+				return 0;
+			}
+		}
+		if (smsk)
+			*sp = smsk;
+	}
+	return msk;
+}
+
+
+void optprint(secmsk, secbits, optmsk, optbits)
+u_short secmsk, secbits;
+u_long optmsk, optbits;
+{
+	struct ipopt_names *io, *so;
+	char *s;
+	int secflag = 0;
+
+	s = " opt ";
+	for (io = ionames; io->on_name; io++)
+		if ((io->on_bit & optmsk) &&
+		    ((io->on_bit & optmsk) == (io->on_bit & optbits))) {
+			if ((io->on_value != IPOPT_SECURITY) ||
+			    (!secmsk && !secbits)) {
+				printf("%s%s", s, io->on_name);
+				if (io->on_value == IPOPT_SECURITY)
+					io++;
+				s = ",";
+			} else
+				secflag = 1;
+		}
+
+
+	if (secmsk & secbits) {
+		printf("%ssec-class", s);
+		s = " ";
+		for (so = secclass; so->on_name; so++)
+			if ((secmsk & so->on_bit) &&
+			    ((so->on_bit & secmsk) == (so->on_bit & secbits))) {
+				printf("%s%s", s, so->on_name);
+				s = ",";
+			}
+	}
+
+	if ((optmsk && (optmsk != optbits)) ||
+	    (secmsk && (secmsk != secbits))) {
+		s = " ";
+		printf(" not opt");
+		if (optmsk != optbits) {
+			for (io = ionames; io->on_name; io++)
+				if ((io->on_bit & optmsk) &&
+				    ((io->on_bit & optmsk) !=
+				     (io->on_bit & optbits))) {
+					if ((io->on_value != IPOPT_SECURITY) ||
+					    (!secmsk && !secbits)) {
+						printf("%s%s", s, io->on_name);
+						s = ",";
+					} else
+						io++;
+				}
+		}
+
+		if (secmsk != secbits) {
+			printf("%ssec-class", s);
+			s = " ";
+			for (so = secclass; so->on_name; so++)
+				if ((so->on_bit & secmsk) &&
+				    ((so->on_bit & secmsk) !=
+				     (so->on_bit & secbits))) {
+					printf("%s%s", s, so->on_name);
+					s = ",";
+				}
+		}
+	}
+}
+
+char	*icmptypes[] = {
+	"echorep", (char *)NULL, (char *)NULL, "unreach", "squench",
+	"redir", (char *)NULL, (char *)NULL, "echo", (char *)NULL,
+	(char *)NULL, "timex", "paramprob", "timest", "timestrep",
+	"inforeq", "inforep", "maskreq", "maskrep", "END"
+};
+
+/*
+ * set the icmp field to the correct type if "icmp" word is found
+ */
+int	addicmp(cp, fp)
+char	***cp;
+struct	frentry	*fp;
+{
+	char	**t;
+	int	i;
+
+	(*cp)++;
+	if (!**cp)
+		return -1;
+	if (!fp->fr_proto)	/* to catch lusers */
+		fp->fr_proto = IPPROTO_ICMP;
+	if (isdigit(***cp)) {
+		i = atoi(**cp);
+		(*cp)++;
+	} else {
+		for (t = icmptypes, i = 0; ; t++, i++) {
+			if (!*t)
+				continue;
+			if (!strcasecmp("END", *t)) {
+				i = -1;
+				break;
+			}
+			if (!strcasecmp(*t, **cp))
+				break;
+		}
+		if (i == -1)
+			return -1;
+	}
+	fp->fr_icmp = (u_short)(i << 8);
+	fp->fr_icmpm = (u_short)0xff00;
+	(*cp)++;
+	if (!**cp)
+		return 0;
+
+	if (**cp && strcasecmp("code", **cp))
+		return 0;
+	(*cp)++;
+	if (isdigit(***cp)) {
+		i = atoi(**cp);
+		fp->fr_icmp |= (u_short)i;
+		fp->fr_icmpm = (u_short)0xffff;
+		(*cp)++;
+		return 0;
+	}
+	return -1;
+}
+
+
+#define	MAX_ICMPCODE	12
+
+char	*icmpcodes[] = {
+	"net-unr", "host-unr", "proto-unr", "port-unr", "needfrag", "srcfail",
+	"net-unk", "host-unk", "isolate", "net-prohib", "host-prohib",
+	"net-tos", "host-tos", NULL };
+/*
+ * Return the number for the associated ICMP unreachable code.
+ */
+int icmpcode(str)
+char *str;
+{
+	char	*s;
+	int	i, len;
+
+	if (!(s = strrchr(str, ')')))
+		return -1;
+	*s = '\0';
+	if (isdigit(*str))
+		return atoi(str);
+	len = strlen(str);
+	for (i = 0; icmpcodes[i]; i++)
+		if (!strncasecmp(str, icmpcodes[i], MIN(len,
+				 strlen(icmpcodes[i])) ))
+			return i;
+	return -1;
+}
+
+
+/*
+ * set the icmp field to the correct type if "icmp" word is found
+ */
+int	addkeep(cp, fp)
+char	***cp;
+struct	frentry	*fp;
+{
+	if (fp->fr_proto != IPPROTO_TCP && fp->fr_proto != IPPROTO_UDP &&
+	    fp->fr_proto != IPPROTO_ICMP && !(fp->fr_ip.fi_fl & FI_TCPUDP)) {
+		(void)fprintf(stderr, "Can only use keep with UDP/ICMP/TCP\n");
+		return -1;
+	}
+
+	(*cp)++;
+	if (**cp && strcasecmp(**cp, "state") && strcasecmp(**cp, "frags")) {
+		(void)fprintf(stderr, "Unrecognised state keyword \"%s\"\n",
+			**cp);
+		return -1;
+	}
+
+	if (***cp == 's' || ***cp == 'S')
+		fp->fr_flags |= FR_KEEPSTATE;
+	else if (***cp == 'f' || ***cp == 'F')
+		fp->fr_flags |= FR_KEEPFRAG;
+	(*cp)++;
+	return 0;
+}
+
+
+/*
+ * count consecutive 1's in bit mask.  If the mask generated by counting
+ * consecutive 1's is different to that passed, return -1, else return #
+ * of bits.
+ */
+int	countbits(ip)
+u_long	ip;
+{
+	u_long	ipn;
+	int	cnt = 0, i, j;
+
+	ip = ipn = ntohl(ip);
+	for (i = 32; i; i--, ipn *= 2)
+		if (ipn & 0x80000000)
+			cnt++;
+		else
+			break;
+	ipn = 0;
+	for (i = 32, j = cnt; i; i--, j--) {
+		ipn *= 2;
+		if (j > 0)
+			ipn++;
+	}
+	if (ipn == ip)
+		return cnt;
+	return -1;
+}
+
+
+char	*portname(pr, port)
+int	pr, port;
+{
+	static	char	buf[32];
+	struct	protoent	*p = NULL;
+	struct	servent	*sv = NULL, *sv1 = NULL;
+
+	if (pr == -1) {
+		if ((sv = getservbyport(port, "tcp"))) {
+			strncpy(buf, sv->s_name, sizeof(buf)-1);
+			buf[sizeof(buf)-1] = '\0';
+			sv1 = getservbyport(port, "udp");
+			sv = strncasecmp(buf, sv->s_name, strlen(buf)) ?
+			     NULL : sv1;
+		}
+		if (sv)
+			return buf;
+	} else if (pr && (p = getprotobynumber(pr))) {
+		if ((sv = getservbyport(port, p->p_name))) {
+			strncpy(buf, sv->s_name, sizeof(buf)-1);
+			buf[sizeof(buf)-1] = '\0';
+			return buf;
+		}
+	}
+
+	(void) sprintf(buf, "%d", port);
+	return buf;
+}
+
+
+/*
+ * print the filter structure in a useful way
+ */
+void	printfr(fp)
+struct	frentry	*fp;
+{
+	static	char	*pcmp1[] = { "*", "=", "!=", "<", ">", "<=", ">=",
+				    "<>", "><"};
+	struct	protoent	*p;
+	int	ones = 0, pr;
+	char	*s;
+	u_char	*t;
+
+	if (fp->fr_flags & FR_PASS) {
+		(void)printf("pass");
+	} else if (fp->fr_flags & FR_BLOCK) {
+		(void)printf("block");
+		if (fp->fr_flags & FR_RETICMP) {
+			(void)printf(" return-icmp");
+			if (fp->fr_icode)
+				if (fp->fr_icode <= MAX_ICMPCODE)
+					printf("(%s)",
+						icmpcodes[(int)fp->fr_icode]);
+				else
+					printf("(%d)", fp->fr_icode);
+		}
+		if (fp->fr_flags & FR_RETRST)
+			(void)printf(" return-rst");
+	} else if ((fp->fr_flags & FR_LOGMASK) == FR_LOG) {
+		(void)printf("log");
+		if (fp->fr_flags & FR_LOGBODY)
+			(void)printf(" body");
+		if (fp->fr_flags & FR_LOGFIRST)
+			(void)printf(" first");
+	} else if (fp->fr_flags & FR_ACCOUNT)
+		(void)printf("count");
+
+	if (fp->fr_flags & FR_OUTQUE)
+		(void)printf(" out ");
+	else
+		(void)printf(" in ");
+
+	if (((fp->fr_flags & FR_LOGB) == FR_LOGB) ||
+	    ((fp->fr_flags & FR_LOGP) == FR_LOGP)) {
+		(void)printf("log ");
+		if (fp->fr_flags & FR_LOGBODY)
+			(void)printf("body ");
+		if (fp->fr_flags & FR_LOGFIRST)
+			(void)printf("first ");
+		if (fp->fr_flags & FR_LOGORBLOCK)
+			(void)printf("or-block ");
+	}
+	if (fp->fr_flags & FR_QUICK)
+		(void)printf("quick ");
+
+	if (*fp->fr_ifname) {
+		(void)printf("on %s%s ", fp->fr_ifname,
+			(fp->fr_ifa || (int)fp->fr_ifa == -1) ? "" : "(!)");
+		if (*fp->fr_dif.fd_ifname)
+			print_toif("dup-to", &fp->fr_dif);
+		if (*fp->fr_tif.fd_ifname)
+			print_toif("to", &fp->fr_tif);
+		if (fp->fr_flags & FR_FASTROUTE)
+			(void)printf("fastroute ");
+
+	}
+	if (fp->fr_mip.fi_tos)
+		(void)printf("tos %#x ", fp->fr_tos);
+	if (fp->fr_mip.fi_ttl)
+		(void)printf("ttl %d ", fp->fr_ttl);
+	if (fp->fr_ip.fi_fl & FI_TCPUDP) {
+			(void)printf("proto tcp/udp ");
+			pr = -1;
+	} else if ((pr = fp->fr_mip.fi_p)) {
+		if ((p = getprotobynumber(fp->fr_proto)))
+			(void)printf("proto %s ", p->p_name);
+		else
+			(void)printf("proto %d ", fp->fr_proto);
+	}
+
+	if (!fp->fr_src.s_addr & !fp->fr_smsk.s_addr)
+		(void)printf("from any ");
+	else {
+		(void)printf("from %s", inet_ntoa(fp->fr_src));
+		if ((ones = countbits(fp->fr_smsk.s_addr)) == -1)
+			(void)printf("/%s ", inet_ntoa(fp->fr_smsk));
+		else
+			(void)printf("/%d ", ones);
+	}
+	if (fp->fr_scmp)
+		if (fp->fr_scmp == FR_INRANGE || fp->fr_scmp == FR_OUTRANGE)
+			(void)printf("port %d %s %d ", fp->fr_sport,
+				     pcmp1[fp->fr_scmp], fp->fr_stop);
+		else
+			(void)printf("port %s %s ", pcmp1[fp->fr_scmp],
+				     portname(pr, fp->fr_sport));
+	if (!fp->fr_dst.s_addr & !fp->fr_dmsk.s_addr)
+		(void)printf("to any");
+	else {
+		(void)printf("to %s", inet_ntoa(fp->fr_dst));
+		if ((ones = countbits(fp->fr_dmsk.s_addr)) == -1)
+			(void)printf("/%s", inet_ntoa(fp->fr_dmsk));
+		else
+			(void)printf("/%d", ones);
+	}
+	if (fp->fr_dcmp) {
+		if (fp->fr_dcmp == FR_INRANGE || fp->fr_dcmp == FR_OUTRANGE)
+			(void)printf(" port %d %s %d", fp->fr_dport,
+				     pcmp1[fp->fr_dcmp], fp->fr_dtop);
+		else
+			(void)printf(" port %s %s", pcmp1[fp->fr_dcmp],
+				     portname(pr, fp->fr_dport));
+	}
+	if ((fp->fr_ip.fi_fl & ~FI_TCPUDP) ||
+	    (fp->fr_mip.fi_fl & ~FI_TCPUDP) ||
+	    fp->fr_ip.fi_optmsk || fp->fr_mip.fi_optmsk ||
+	    fp->fr_ip.fi_secmsk || fp->fr_mip.fi_secmsk) {
+		(void)printf(" with");
+		if (fp->fr_ip.fi_optmsk || fp->fr_mip.fi_optmsk ||
+		    fp->fr_ip.fi_secmsk || fp->fr_mip.fi_secmsk)
+			optprint(fp->fr_mip.fi_secmsk,
+				 fp->fr_ip.fi_secmsk,
+				 fp->fr_mip.fi_optmsk,
+				 fp->fr_ip.fi_optmsk);
+		else if (fp->fr_mip.fi_fl & FI_OPTIONS) {
+			if (!(fp->fr_ip.fi_fl & FI_OPTIONS))
+				(void)printf(" not");
+			(void)printf(" ipopt");
+		}
+		if (fp->fr_mip.fi_fl & FI_SHORT) {
+			if (!(fp->fr_ip.fi_fl & FI_SHORT))
+				(void)printf(" not");
+			(void)printf(" short");
+		}
+		if (fp->fr_mip.fi_fl & FI_FRAG) {
+			if (!(fp->fr_ip.fi_fl & FI_FRAG))
+				(void)printf(" not");
+			(void)printf(" frag");
+		}
+	}
+	if (fp->fr_proto == IPPROTO_ICMP && fp->fr_icmpm) {
+		int	type = fp->fr_icmp, code;
+
+		type = ntohs(fp->fr_icmp);
+		code = type & 0xff;
+		type /= 256;
+		if (type < (sizeof(icmptypes) / sizeof(char *)) &&
+		    icmptypes[type])
+			(void)printf(" icmp-type %s", icmptypes[type]);
+		else
+			(void)printf(" icmp-type %d", type);
+		if (code)
+			(void)printf(" code %d", code);
+	}
+	if (fp->fr_proto == IPPROTO_TCP && (fp->fr_tcpf || fp->fr_tcpfm)) {
+		(void)printf(" flags ");
+		for (s = flagset, t = flags; *s; s++, t++)
+			if (fp->fr_tcpf & *t)
+				(void)putchar(*s);
+		if (fp->fr_tcpfm) {
+			(void)putchar('/');
+			for (s = flagset, t = flags; *s; s++, t++)
+				if (fp->fr_tcpfm & *t)
+					(void)putchar(*s);
+		}
+	}
+
+	if (fp->fr_flags & FR_KEEPSTATE)
+		printf(" keep state");
+	if (fp->fr_flags & FR_KEEPFRAG)
+		printf(" keep frags");
+	(void)putchar('\n');
+}
+
+void	binprint(fp)
+struct frentry *fp;
+{
+	int i = sizeof(*fp), j = 0;
+	u_char *s;
+
+	for (s = (u_char *)fp; i; i--, s++) {
+		j++;
+		(void)printf("%02x ",*s);
+		if (j == 16) {
+			(void)printf("\n");
+			j = 0;
+		}
+	}
+	putchar('\n');
+	(void)fflush(stdout);
+}
diff --git a/contrib/ipfilter/pcap.h b/contrib/ipfilter/pcap.h
new file mode 100644
index 0000000..c909297
--- /dev/null
+++ b/contrib/ipfilter/pcap.h
@@ -0,0 +1,35 @@
+/*
+ * (C)opyright 1993-1996 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ * $Id: pcap.h,v 2.0.1.1 1997/01/09 15:14:45 darrenr Exp $
+ */
+/*
+ * This header file is constructed to match the version described by
+ * PCAP_VERSION_MAJ.
+ *
+ * The structure largely derives from libpcap which wouldn't include
+ * nicely without bpf.
+ */
+typedef	struct	pcap_filehdr	{
+	u_int	pc_id;
+	u_short	pc_v_maj;
+	u_short	pc_v_min;
+	u_int	pc_zone;
+	u_int	pc_sigfigs;
+	u_int	pc_slen;
+	u_int	pc_type;
+} pcaphdr_t;
+
+#define	TCPDUMP_MAGIC		0xa1b2c3d4
+
+#define	PCAP_VERSION_MAJ	2
+
+typedef	struct	pcap_pkthdr	{
+	struct	timeval	ph_ts;
+	u_int	ph_clen;
+	u_int	ph_len;
+} pcappkt_t;
+
diff --git a/contrib/ipfilter/relay.c b/contrib/ipfilter/relay.c
new file mode 100644
index 0000000..9a181a1
--- /dev/null
+++ b/contrib/ipfilter/relay.c
@@ -0,0 +1,179 @@
+/*
+ * Sample program to be used as a transparent proxy.
+ *
+ * Must be executed with permission enough to do an ioctl on /dev/ipl
+ * or equivalent.  This is just a sample and is only alpha quality.
+ * - Darren Reed (8 April 1996)
+ */
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/syslog.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include "ip_nat.h"
+
+#define	RELAY_BUFSZ	8192
+
+char	ibuff[RELAY_BUFSZ];
+char	obuff[RELAY_BUFSZ];
+
+int relay(ifd, ofd, rfd)
+int ifd, ofd, rfd;
+{
+	fd_set	rfds, wfds;
+	char	*irh, *irt, *rrh, *rrt;
+	char	*iwh, *iwt, *rwh, *rwt;
+	int	nfd, n, rw;
+
+	irh = irt = ibuff;
+	iwh = iwt = obuff;
+	nfd = ifd;
+	if (nfd < ofd)
+		nfd = ofd;
+	if (nfd < rfd)
+		nfd = rfd;
+
+	while (1) {
+		FD_ZERO(&rfds);
+		FD_ZERO(&wfds);
+		if (irh > irt)
+			FD_SET(rfd, &wfds);
+		if (irh < (ibuff + RELAY_BUFSZ))
+			FD_SET(ifd, &rfds);
+		if (iwh > iwt)
+			FD_SET(ofd, &wfds);
+		if (iwh < (obuff + RELAY_BUFSZ))
+			FD_SET(rfd, &rfds);
+
+		switch ((n = select(nfd + 1, &rfds, &wfds, NULL, NULL)))
+		{
+		case -1 :
+		case 0 :
+			return -1;
+		default :
+			if (FD_ISSET(ifd, &rfds)) {
+				rw = read(ifd, irh, ibuff + RELAY_BUFSZ - irh);
+				if (rw == -1)
+					return -1;
+				if (rw == 0)
+					return 0;
+				irh += rw;
+				n--;
+			}
+			if (n && FD_ISSET(ofd, &wfds)) {
+				rw = write(ofd, iwt, iwh  - iwt);
+				if (rw == -1)
+					return -1;
+				iwt += rw;
+				n--;
+			}
+			if (n && FD_ISSET(rfd, &rfds)) {
+				rw = read(rfd, iwh, obuff + RELAY_BUFSZ - iwh);
+				if (rw == -1)
+					return -1;
+				if (rw == 0)
+					return 0;
+				iwh += rw;
+				n--;
+			}
+			if (n && FD_ISSET(rfd, &wfds)) {
+				rw = write(rfd, irt, irh  - irt);
+				if (rw == -1)
+					return -1;
+				irt += rw;
+				n--;
+			}
+			if (irh == irt)
+				irh = irt = ibuff;
+			if (iwh == iwt)
+				iwh = iwt = obuff;
+		}
+	}
+}
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+	struct	sockaddr_in	sin;
+	natlookup_t	nl;
+	int	fd, sl = sizeof(sl), se;
+
+	openlog(argv[0], LOG_PID|LOG_NDELAY, LOG_DAEMON);
+	if ((fd = open("/dev/ipl", O_RDONLY)) == -1) {
+		se = errno;
+		perror("open");
+		errno = se;
+		syslog(LOG_ERR, "open: %m\n");
+		exit(-1);
+	}
+
+	bzero(&sin, sizeof(sin));
+	sin.sin_family = AF_INET;
+	sl = sizeof(sin);
+	if (getsockname(0, (struct sockaddr *)&sin, &sl) == -1) {
+		se = errno;
+		perror("getsockname");
+		errno = se;
+		syslog(LOG_ERR, "getsockname: %m\n");
+		exit(-1);
+	} else {
+		nl.nl_inip.s_addr = sin.sin_addr.s_addr;
+		nl.nl_inport = sin.sin_port;
+	}
+
+	bzero(&sin, sizeof(sin));
+	sin.sin_family = AF_INET;
+	sl = sizeof(sin);
+	if (getpeername(0, (struct sockaddr *)&sin, &sl) == -1) {
+		se = errno;
+		perror("getpeername");
+		errno = se;
+		syslog(LOG_ERR, "getpeername: %m\n");
+		exit(-1);
+	} else {
+		nl.nl_outip.s_addr = sin.sin_addr.s_addr;
+		nl.nl_outport = sin.sin_port;
+	}
+
+	if (ioctl(fd, SIOCGNATL, &nl) == -1) {
+		se = errno;
+		perror("ioctl");
+		errno = se;
+		syslog(LOG_ERR, "ioctl: %m\n");
+		exit(-1);
+	}
+
+	sin.sin_port = nl.nl_inport;
+	sin.sin_addr = nl.nl_inip;
+	sl = sizeof(sin);
+
+	fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (connect(fd, (struct sockaddr *)&sin, sl) == -1) {
+		se = errno;
+		perror("connect");
+		errno = se;
+		syslog(LOG_ERR, "connect: %m\n");
+		exit(-1);
+	}
+
+	(void) ioctl(fd, F_SETFL, ioctl(fd, F_GETFL, 0)|O_NONBLOCK);
+	(void) ioctl(0, F_SETFL, ioctl(fd, F_GETFL, 0)|O_NONBLOCK);
+	(void) ioctl(1, F_SETFL, ioctl(fd, F_GETFL, 0)|O_NONBLOCK);
+
+	syslog(LOG_NOTICE, "connected to %s,%d\n", inet_ntoa(sin.sin_addr),
+		ntohs(sin.sin_port));
+	if (relay(0, 1, fd) == -1) {
+		se = errno;
+		perror("relay");
+		errno = se;
+		syslog(LOG_ERR, "relay: %m\n");
+		exit(-1);
+	}
+	exit(0);
+}
diff --git a/contrib/ipfilter/rules/example.1 b/contrib/ipfilter/rules/example.1
new file mode 100644
index 0000000..604346e
--- /dev/null
+++ b/contrib/ipfilter/rules/example.1
@@ -0,0 +1,4 @@
+#
+# block all incoming TCP packets on le0 from host "foo" to any destination.
+#
+block in on le0 proto tcp from foo/32 to any
diff --git a/contrib/ipfilter/rules/example.10 b/contrib/ipfilter/rules/example.10
new file mode 100644
index 0000000..477c2e0
--- /dev/null
+++ b/contrib/ipfilter/rules/example.10
@@ -0,0 +1,12 @@
+#
+# pass ack packets (ie established connection)
+#
+pass in proto tcp 10.1.0.0/16 port = 23 10.2.0.0/16 flags A/A
+pass out proto tcp 10.1.0.0/16 port = 23 10.2.0.0/16 flags A/A
+#
+# block incoming connection requests to my internal network from the big bad
+# internet.
+#
+block in on le0 proto tcp from any to 10.1.0.0/16 flags S/SA
+#  to block the replies:
+block out on le0 proto tcp from 10.1.0.0 to any flags SA/SA
diff --git a/contrib/ipfilter/rules/example.11 b/contrib/ipfilter/rules/example.11
new file mode 100644
index 0000000..7fc26eb
--- /dev/null
+++ b/contrib/ipfilter/rules/example.11
@@ -0,0 +1,26 @@
+#
+# allow any TCP packets from the same subnet as foo is on through to host
+# 10.1.1.2 if they are destined for port 6667.
+#
+pass in proto tcp from fubar/24 to 10.1.1.2/32 port = 6667
+#
+# allow in UDP packets which are NOT from port 53 and are destined for
+# localhost
+#
+pass in proto udp from fubar port != 53 to localhost
+#
+# block anything trying to get to X terminal ports, X:0 to X:9
+#
+block in proto tcp from any to any port 5999 >< 6010
+#
+# allow any connections to be made, except to BSD print/r-services
+# this will also protect syslog.
+#
+block in proto tcp/udp all
+pass in proto tcp/udp from any to any port 512 <> 515
+#
+# allow any connections to be made, except to BSD print/r-services
+# this will also protect syslog.
+#
+pass in proto tcp/udp all
+block in proto tcp/udp from any to any port 511 >< 516
diff --git a/contrib/ipfilter/rules/example.12 b/contrib/ipfilter/rules/example.12
new file mode 100644
index 0000000..c0ba1d3
--- /dev/null
+++ b/contrib/ipfilter/rules/example.12
@@ -0,0 +1,17 @@
+#
+# get rid of all short IP fragments (too small for valid comparison)
+#
+block in proto tcp all with short
+#
+# drop and log any IP packets with options set in them.
+#
+block in log all with ipopts
+#
+# log packets with BOTH ssrr and lsrr set
+#
+log in all with opt lsrr,ssrr
+#
+# drop any source routing options
+#
+block in quick all with opt lsrr
+block in quick all with opt ssrr
diff --git a/contrib/ipfilter/rules/example.13 b/contrib/ipfilter/rules/example.13
new file mode 100644
index 0000000..df13d0a
--- /dev/null
+++ b/contrib/ipfilter/rules/example.13
@@ -0,0 +1,17 @@
+#
+# Log all short TCP packets to qe3, with "packetlog" as the intended
+# destination for the packet.
+#
+block in to qe3:packetlog proto tcp all with short
+#
+# Log all connection attempts for TCP
+#
+pass in dup-to le0:packetlog proto tcp all flags S/SA
+#
+# Route all UDP packets through transparently.
+#
+pass in fastroute proto udp all
+#
+# Route all ICMP packets to network 10 out through le1, to "router"
+#
+pass in to le1:router proto icmp all
diff --git a/contrib/ipfilter/rules/example.2 b/contrib/ipfilter/rules/example.2
new file mode 100644
index 0000000..59d9ec8
--- /dev/null
+++ b/contrib/ipfilter/rules/example.2
@@ -0,0 +1,4 @@
+#
+# block all outgoing TCP packets on le0 from any host to port 23 of host bar.
+#
+block out on le0 proto tcp from any to bar/32 port != 23
diff --git a/contrib/ipfilter/rules/example.3 b/contrib/ipfilter/rules/example.3
new file mode 100644
index 0000000..cd31f73
--- /dev/null
+++ b/contrib/ipfilter/rules/example.3
@@ -0,0 +1,40 @@
+#
+# block all inbound packets.
+#
+block in from any to any
+#
+# pass through packets to and from localhost.
+#
+pass in from 127.0.0.1/32 to 127.0.0.1/32
+#
+# allow a variety of individual hosts to send any type of IP packet to any
+# other host.
+#
+pass in from 10.1.3.1/32 to any
+pass in from 10.1.3.2/32 to any
+pass in from 10.1.3.3/32 to any
+pass in from 10.1.3.4/32 to any
+pass in from 10.1.3.5/32 to any
+pass in from 10.1.0.13/32 to any
+pass in from 10.1.1.1/32 to any
+pass in from 10.1.2.1/32 to any
+#
+#
+# block all outbound packets.
+#
+block out from any to any
+#
+# allow any packets destined for localhost out.
+#
+pass out from any to 127.0.0.1/32
+#
+# allow any host to send any IP packet out to a limited number of hosts.
+#
+pass out from any to 10.1.3.1/32
+pass out from any to 10.1.3.2/32
+pass out from any to 10.1.3.3/32
+pass out from any to 10.1.3.4/32
+pass out from any to 10.1.3.5/32
+pass out from any to 10.1.0.13/32
+pass out from any to 10.1.1.1/32
+pass out from any to 10.1.2.1/32
diff --git a/contrib/ipfilter/rules/example.4 b/contrib/ipfilter/rules/example.4
new file mode 100644
index 0000000..7918ec2
--- /dev/null
+++ b/contrib/ipfilter/rules/example.4
@@ -0,0 +1,4 @@
+#
+# block all ICMP packets.
+#
+block in proto icmp from any to any
diff --git a/contrib/ipfilter/rules/example.5 b/contrib/ipfilter/rules/example.5
new file mode 100644
index 0000000..6e122e0
--- /dev/null
+++ b/contrib/ipfilter/rules/example.5
@@ -0,0 +1,25 @@
+#
+# test ruleset
+#
+# allow packets coming from foo to bar through.
+#
+pass from foo to bar
+#
+# allow any TCP packets from the same subnet as foo is on through to host
+# 10.1.1.2 if they are destined for port 6667.
+#
+pass proto tcp from fubar/24 to 10.1.1.2/32 port = 6667
+#
+# allow in UDP packets which are NOT from port 53 and are destined for
+# localhost
+#
+pass proto udp from fubar port != 53 to localhost
+#
+# block all ICMP unreachables.
+#
+block from any to any icmp unreach
+#
+# allow packets through which have a non-standard IP header length (ie there
+# are IP options such as source-routing present).
+#
+pass from any to any with ipopts
diff --git a/contrib/ipfilter/rules/example.6 b/contrib/ipfilter/rules/example.6
new file mode 100644
index 0000000..d40f0f3
--- /dev/null
+++ b/contrib/ipfilter/rules/example.6
@@ -0,0 +1,5 @@
+#
+# block all TCP packets with only the SYN flag set (this is the first
+# packet sent to establish a connection) out of the SYN-ACK pair.
+#
+block in proto tcp from any to any flags S/SA
diff --git a/contrib/ipfilter/rules/example.7 b/contrib/ipfilter/rules/example.7
new file mode 100644
index 0000000..062de98
--- /dev/null
+++ b/contrib/ipfilter/rules/example.7
@@ -0,0 +1,12 @@
+# block all ICMP packets.
+#
+block in proto icmp all
+#
+# allow in ICMP echos and echo-replies.
+#
+pass in on le1 proto icmp from any to any icmp-type echo
+pass in on le1 proto icmp from any to any icmp-type echorep
+#
+# block all ICMP destination unreachable packets which are port-unreachables
+#
+block in on le1 proto icmp from any to any icmp-type unreach code 3
diff --git a/contrib/ipfilter/rules/example.8 b/contrib/ipfilter/rules/example.8
new file mode 100644
index 0000000..baa0258
--- /dev/null
+++ b/contrib/ipfilter/rules/example.8
@@ -0,0 +1,10 @@
+#
+# block all incoming TCP connections but send back a TCP-RST for ones to
+# the ident port
+#
+block in proto tcp from any to any flags S/SA
+block return-rst in quick proto tcp from any to any port = 113 flags S/SA
+#
+# block all inbound UDP packets and send back an ICMP error.
+#
+block return-icmp in proto udp from any to any
diff --git a/contrib/ipfilter/rules/example.9 b/contrib/ipfilter/rules/example.9
new file mode 100644
index 0000000..77968f8
--- /dev/null
+++ b/contrib/ipfilter/rules/example.9
@@ -0,0 +1,12 @@
+#
+# drop all packets without IP security options
+#
+block in all
+pass in all with opt sec
+#
+# only allow packets in and out on le0 which are top secret
+#
+block out on le1 all
+pass out on le1 all with opt sec-class topsecret
+block in on le1 all
+pass in on le1 all with opt sec-class topsecret
diff --git a/contrib/ipfilter/rules/example.sr b/contrib/ipfilter/rules/example.sr
new file mode 100644
index 0000000..c4c1994
--- /dev/null
+++ b/contrib/ipfilter/rules/example.sr
@@ -0,0 +1,61 @@
+#
+# log all inbound packet on le0 which has IP options present
+#
+log in on le0 from any to any with ipopts
+#
+# block any inbound packets on le0 which are fragmented and "too short" to
+# do any meaningful comparison on.  This actually only applies to TCP
+# packets which can be missing the flags/ports (depending on which part
+# of the fragment you see).
+#
+block in log quick on le0 from any to any with short frag
+#
+# log all inbound TCP packets with the SYN flag (only) set
+#  (NOTE: if it were an inbound TCP packet with the SYN flag set and it
+#         had IP options present, this rule and the above would cause it
+#         to be logged twice).
+#
+log in on le0 proto tcp from any to any flags S/SA
+#
+# block and log any inbound ICMP unreachables
+#
+block in log on le0 proto icmp from any to any icmp-type unreach
+#
+# block and log any inbound UDP packets on le0 which are going to port 2049
+# (the NFS port).
+#
+block in log on le0 proto udp from any to any port = 2049
+#
+# quickly allow any packets to/from a particular pair of hosts
+#
+pass in quick from any to 10.1.3.2/32
+pass in quick from any to 10.1.0.13/32
+pass in quick from 10.1.3.2/32 to any
+pass in quick from 10.1.0.13/32 to any
+#
+# block (and stop matching) any packet with IP options present.
+#
+block in quick on le0 from any to any with ipopts
+#
+# allow any packet through
+#
+pass in from any to any
+#
+# block any inbound UDP packets destined for these subnets.
+#
+block in on le0 proto udp from any to 10.1.3.0/24
+block in on le0 proto udp from any to 10.1.1.0/24
+block in on le0 proto udp from any to 10.1.2.0/24
+#
+# block any inbound TCP packets with only the SYN flag set that are
+# destined for these subnets.
+#
+block in on le0 proto tcp from any to 10.1.3.0/24 flags S/SA
+block in on le0 proto tcp from any to 10.1.2.0/24 flags S/SA
+block in on le0 proto tcp from any to 10.1.1.0/24 flags S/SA
+#
+# block any inbound ICMP packets destined for these subnets.
+#
+block in on le0 proto icmp from any to 10.1.3.0/24
+block in on le0 proto icmp from any to 10.1.1.0/24
+block in on le0 proto icmp from any to 10.1.2.0/24
diff --git a/contrib/ipfilter/rules/nat.eg b/contrib/ipfilter/rules/nat.eg
new file mode 100644
index 0000000..9c26754
--- /dev/null
+++ b/contrib/ipfilter/rules/nat.eg
@@ -0,0 +1,14 @@
+# map all tcp connections from 10.1.0.0/16 to 240.1.0.1, changing the source
+# port number to something between 10,000 and 20,000 inclusive.  For all other
+# IP packets, allocate an IP # between 240.1.0.0 and 240.1.0.255, temporarily
+# for each new user.
+#
+map ed1 10.1.0.0/16 -> 240.1.0.1/32 portmap tcp 10000:20000
+map ed1 10.1.0.0/16 -> 240.1.0.0/24
+#
+# Redirection is triggered for input packets.
+# For example, to redirect FTP connections through this box, to the local ftp
+# port, forcing them to connect through a proxy, you would use:
+#
+rdr ed0 0.0.0.0/0 port ftp -> 127.0.0.1 port ftp
+#
diff --git a/contrib/ipfilter/rules/server b/contrib/ipfilter/rules/server
new file mode 100644
index 0000000..5eafc7c
--- /dev/null
+++ b/contrib/ipfilter/rules/server
@@ -0,0 +1,11 @@
+#
+# For a network server, which has two interfaces, 128.1.40.1 (le0) and
+# 128.1.2.1 (le1), we want to block all IP spoofing attacks.  le1 is
+# connected to the majority of the network, whilst le0 is connected to a
+# leaf subnet.  We're not concerned about filtering individual services
+# or 
+#
+pass in quick on le0 from 128.1.40.0/24 to any
+block in quick log on le0 from any to any
+block in quick log on le1 from 128.1.1.0/24 to any
+pass in quick on le1 from any to any
diff --git a/contrib/ipfilter/rules/tcpstate b/contrib/ipfilter/rules/tcpstate
new file mode 100644
index 0000000..339a25f
--- /dev/null
+++ b/contrib/ipfilter/rules/tcpstate
@@ -0,0 +1,13 @@
+#
+# Only allow TCP packets in/out of le0 if there is an outgoing connection setup
+# somewhere, waiting for it.
+#
+pass out quick on le0 proto tcp from any to any flags S/SAFR keep state
+block out on le0 proto tcp all
+block in on le0 proto tcp all
+#
+# allow nameserver queries and replies to pass through, but no other UDP
+#
+pass out quick on le0 proto udp from any to any port = 53 keep state
+block out on le0 proto udp all
+block in on le0 proto udp all
diff --git a/contrib/ipfilter/snoop.h b/contrib/ipfilter/snoop.h
new file mode 100644
index 0000000..fdebcef
--- /dev/null
+++ b/contrib/ipfilter/snoop.h
@@ -0,0 +1,42 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+
+/*
+ * written to comply with the RFC (1761) from Sun.
+ * $Id: snoop.h,v 2.0.1.1 1997/01/09 15:14:45 darrenr Exp $
+ */
+struct	snoophdr	{
+	char	s_id[8];
+	int	s_v;
+	int	s_type;
+};
+
+#define	SNOOP_VERSION	2
+
+#define	SDL_8023	0
+#define	SDL_8024	1
+#define	SDL_8025	2
+#define	SDL_8026	3
+#define	SDL_ETHER	4
+#define	SDL_HDLC	5
+#define	SDL_CHSYNC	6
+#define	SDL_IBMCC	7
+#define	SDL_FDDI	8
+#define	SDL_OTHER	9
+
+#define	SDL_MAX		9
+
+
+struct	snooppkt	{
+	int	sp_olen;
+	int	sp_ilen;
+	int	sp_plen;
+	int	sp_drop;
+	int	sp_sec;
+	int	sp_usec;
+};
diff --git a/contrib/ipfilter/solaris.c b/contrib/ipfilter/solaris.c
new file mode 100644
index 0000000..73db28f
--- /dev/null
+++ b/contrib/ipfilter/solaris.c
@@ -0,0 +1,1018 @@
+/*
+ * (C)opyright 1993,1994,1995 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+/* #pragma ident   "@(#)solaris.c	1.12 6/5/96 (C) 1995 Darren Reed"*/
+#pragma ident   "$Id: solaris.c,v 2.0.1.4 1997/02/08 06:38:30 darrenr Exp $";
+
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/uio.h>
+#include <sys/buf.h>
+#include <sys/modctl.h>
+#include <sys/open.h>
+#include <sys/kmem.h>
+#include <sys/conf.h>
+#include <sys/cmn_err.h>
+#include <sys/stat.h>
+#include <sys/cred.h>
+#include <sys/dditypes.h>
+#include <sys/stream.h>
+#include <sys/poll.h>
+#include <sys/autoconf.h>
+#include <sys/byteorder.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/af.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/if_ether.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/tcpip.h>
+#include <netinet/ip_icmp.h>
+#include "ipl.h"
+#include "ip_fil.h"
+#include "ip_compat.h"
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <inet/ip_ire.h>
+
+char	_depends_on[] = "drv/ip";
+
+extern	int	iplopen(), iplclose(), iplread(), iplioctl();
+extern	int	iplattach(), ipldetach();
+extern	void	copyout_mblk(), copyin_mblk();
+
+int	solattach(), soldetach();
+
+extern	struct	filterstats	frstats[];
+extern	kmutex_t	ipl_mutex, ipf_mutex, ipfs_mutex;
+extern	int	fr_flags;
+
+static	qif_t	*qif_head = NULL;
+
+static	int	ipl_getinfo(), ipl_probe(), ipl_identify(), ipl_attach();
+static	int	ipl_detach();
+
+static struct cb_ops ipl_cb_ops = {
+	iplopen,
+	iplclose,
+	nodev,		/* strategy */ nodev,		/* print */
+	nodev,		/* dump */
+	iplread,
+	nodev,		/* write */
+	iplioctl,	/* ioctl */
+	nodev,		/* devmap */
+	nodev,		/* mmap */
+	nodev,		/* segmap */
+	nochpoll,	/* poll */
+	ddi_prop_op,
+	NULL,
+	D_MTSAFE
+};
+
+static struct dev_ops ipl_ops = {
+	DEVO_REV,
+	0,
+	ipl_getinfo,
+	ipl_identify,
+	ipl_probe,
+	ipl_attach,
+	ipl_detach,
+	nodev,		/* reset */
+	&ipl_cb_ops,
+	(struct bus_ops *)0
+};
+
+extern struct mod_ops mod_driverops;
+static struct modldrv iplmod = {
+	&mod_driverops, IPL_VERSION, &ipl_ops };
+static struct modlinkage modlink1 = { MODREV_1, &iplmod, 0 };
+
+
+static dev_info_t *ipf_dev_info = NULL;
+
+
+int _init()
+{
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipf_init()");
+#endif
+	return mod_install(&modlink1);
+}
+
+
+int _fini(void)
+{
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipf_fini()");
+#endif
+	return mod_remove(&modlink1);
+}
+
+
+int _info(struct modinfo *modinfop)
+{
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipf_info(%x)", modinfop);
+#endif
+	return mod_info(&modlink1, modinfop);
+}
+
+
+static int ipl_probe(dev_info_t *dip)
+{
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipl_probe(%x)", dip);
+#endif
+	return DDI_PROBE_SUCCESS;
+}
+
+
+static int ipl_identify(dev_info_t *dip)
+{
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipl_identify(%x)", dip);
+#endif
+	if (strcmp(ddi_get_name(dip), "ipf") == 0)
+		return (DDI_IDENTIFIED);
+	return (DDI_NOT_IDENTIFIED);
+}
+
+
+static int ipl_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
+{
+	int instance;
+
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipl_attach(%x,%x)", dip, cmd);
+#endif
+	switch (cmd) {
+	case DDI_ATTACH:
+		instance = ddi_get_instance(dip);
+#ifdef	IPFDEBUG
+		cmn_err(CE_NOTE, "IP Filter: attach ipf instace %d", instance);
+#endif
+		if (ddi_create_minor_node(dip, "ipf", S_IFCHR, instance,
+					  DDI_PSEUDO, 0) == DDI_FAILURE) {
+			ddi_remove_minor_node(dip, NULL);
+			goto attach_failed;
+		}
+		ipf_dev_info = dip;
+		sync();
+		/*
+		 * Initialize mutex's
+		 */
+		iplattach();
+		solattach();
+		cmn_err(CE_CONT, "IP Filter: attaching complete.\n");
+		return (DDI_SUCCESS);
+	default:
+		return (DDI_FAILURE);
+	}
+
+attach_failed:
+	/*
+	 * Use our own detach routine to toss
+	 * away any stuff we allocated above.
+	 */
+	(void) ipl_detach(dip, DDI_DETACH);
+	return (DDI_FAILURE);
+}
+
+
+static int ipl_detach(dip, cmd)
+dev_info_t *dip;
+ddi_detach_cmd_t cmd;
+{
+	int instance;
+
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipl_detach(%x,%x)", dip, cmd);
+#endif
+	switch (cmd) {
+	case DDI_DETACH:
+		/*
+		 * Undo what we did in ipl_attach, freeing resources
+		 * and removing things we installed.  The system
+		 * framework guarantees we are not active with this devinfo
+		 * node in any other entry points at this time.
+		 */
+		ddi_prop_remove_all(dip);
+		instance = ddi_get_instance(dip);
+		ddi_remove_minor_node(dip, NULL);
+		sync();
+		if (!soldetach()) {
+			cmn_err(CE_CONT, "IP Filter: detached\n");
+			return (DDI_SUCCESS);
+		}
+	default:
+		return (DDI_FAILURE);
+	}
+}
+
+
+static int ipl_getinfo(dip, infocmd, arg, result)
+dev_info_t *dip;
+ddi_info_cmd_t infocmd;
+void *arg, **result;
+{
+	int error = DDI_FAILURE;
+
+#ifdef	IPFDEBUG
+	cmn_err(CE_NOTE, "IP Filter: ipl_getinfo(%x,%x)", dip, infocmd);
+#endif
+	switch (infocmd) {
+	case DDI_INFO_DEVT2DEVINFO:
+		*result = ipf_dev_info;
+		error = DDI_SUCCESS;
+		break;
+	case DDI_INFO_DEVT2INSTANCE:
+		*result = (void *)getminor((dev_t) arg);
+		error = DDI_SUCCESS;
+		break;
+	default:
+		break;
+	}
+	return (error);
+}
+
+/*
+ * find the filter structure setup for this queue
+ */
+qif_t *qif_from_queue(q)
+queue_t *q;
+{
+	qif_t *qif;
+
+	for (qif = qif_head; qif; qif = qif->qf_next)
+		if ((qif->qf_iptr == q->q_ptr) || (qif->qf_optr == q->q_ptr))
+			break;
+	return qif;
+}
+
+
+/*
+ * OK, this is pretty scrappy code, but then it's essentially just here for
+ * debug purposes and that's it.  Packets should not normally come through
+ * here, and if they do, well, we would like to see as much information as
+ * possible about them and what they claim to hold.
+ */
+void fr_donotip(out, qif, q, m, mt, ip, off)
+int out;
+qif_t *qif;
+queue_t *q;
+mblk_t *m, *mt;
+ip_t *ip;
+int off;
+{
+	u_char *s, outb[256], *t;
+	int i;
+
+	outb[0] = '\0';
+	outb[1] = '\0';
+	outb[2] = '\0';
+	outb[3] = '\0';
+	s = ip ? (u_char *)ip : outb;
+	if (!ip && (m == mt) && m->b_cont && (MTYPE(m) != M_DATA))
+		m = m->b_cont;
+
+	printf("!IP %s:%d %x %x %x %d %x %x %x %d %d %x\n%02x%02x%02x%02x\n",
+		qif ? qif->qf_name : "?", out, q, q ? q->q_ptr : NULL,
+		q ? q->q_qinfo : NULL, mt->b_wptr - mt->b_rptr, m, mt,
+		m->b_rptr, m->b_wptr - m->b_rptr, off, ip,
+		*s, *(s+1), *(s+2), *(s+3));
+	if (m != mt) {
+		i = 0;
+		t = outb;
+		s = mt->b_rptr;
+		sprintf(t, "%d:", MTYPE(mt));
+		t += strlen(t);
+		for (; (i < 100) && (s < mt->b_wptr); i++) {
+			sprintf(t, "%02x%s", *s++, ((i & 3) == 3) ? " " : "");
+			t += ((i & 3) == 3) ? 3 : 2;
+		}
+		*t++ = '\n';
+		*t = '\0';
+		printf("%s", outb);
+	}
+	i = 0;
+	t = outb;
+	s = m->b_rptr;
+	sprintf(t, "%d:", MTYPE(m));
+	t += strlen(t);
+	for (; (i < 100) && (s < m->b_wptr); i++) {
+		sprintf(t, "%02x%s", *s++, ((i & 3) == 3) ? " " : "");
+		t += ((i & 3) == 3) ? 3 : 2;
+	}
+	*t++ = '\n';
+	*t = '\0';
+	printf("%s", outb);
+}
+
+
+/*
+ * find the first data mblk, if present, in the chain we're processing.  Also
+ * make a few sanity checks to try prevent the filter from causing a panic -
+ * none of the nice IP sanity checks (including checksumming) should have been
+ * done yet - dangerous!
+ */
+int fr_precheck(mp, q, qif, out)
+mblk_t **mp;
+queue_t	*q;
+qif_t *qif;
+int out;
+{
+	u_long	lbuf[48];
+	mblk_t *m, *mp1, *mt = *mp;
+	register ip_t *ip;
+	int iphlen, hlen, len, err, mlen, off, synced = 0;
+#ifndef	sparc
+	u_short __iplen, __ipoff;
+#endif
+tryagain:
+	/*
+	 * If there is only M_DATA for a packet going out, then any header
+	 * information (which would otherwise appear in an M_PROTO mblk before
+	 * the M_DATA) is prepended before the IP header.  We need to set the
+	 * offset to account for this. - see MMM
+	 */
+	off = (out) ? qif->qf_hl : 0;
+
+	/*
+	 * Find the first data block, count the data blocks in this chain and
+	 * the total amount of data.
+	 */
+	for (m = mt; m && (MTYPE(m) != M_DATA); m = m->b_cont)
+		off = 0;	/* Any non-M_DATA cancels the offset */
+
+	if (!m)
+		return 0;	/* No data blocks */
+
+	ip = (ip_t *)(m->b_rptr + off);		/* MMM */
+
+	/*
+	 * We might have a 1st data block which is really M_PROTO, i.e. it is
+	 * only big enough for the link layer header
+	 */
+	while ((u_char *)ip >= m->b_wptr) {
+		len = (u_char *)ip - m->b_wptr;
+		if (!(m = m->b_cont))
+			return 0;	/* not enough data for IP */
+		ip = (ip_t *)(m->b_rptr + len);
+	}
+	if ((off = (u_char *)ip - m->b_rptr))
+		m->b_rptr = (u_char *)ip;
+	mlen = msgdsize(m);
+
+	/*
+	 * Ok, the IP header isn't on a 32bit aligned address.  To get around
+	 * this, we copy the data to an aligned buffer and work with that.
+	 */
+	if (!OK_32PTR(ip)) {
+		len = MIN(mlen, sizeof(ip_t));
+		copyout_mblk(m, 0, lbuf, len);
+		frstats[out].fr_pull[0]++;
+		ip = (ip_t *)lbuf;
+	} else
+		len = m->b_wptr - (u_char *)ip;
+
+	if (ip->ip_v != IPVERSION) {
+		m->b_rptr -= off;
+		if (!synced) {
+			synced = 1;
+			ipfsync();
+			goto tryagain;
+		}
+		fr_donotip(out, qif, q, m, mt, ip, off);
+		frstats[out].fr_notip++;
+		return (fr_flags & FF_BLOCKNONIP) ? -1 : 0;
+	}
+
+	hlen = iphlen = ip->ip_hl << 2;
+
+	/*
+	 * Make hlen the total size of the IP header plus TCP/UDP/ICMP header
+	 * (if it is one of these three).
+	 */
+	if (!(ip->ip_off & 0x1fff))
+		switch (ip->ip_p)
+		{
+		case IPPROTO_TCP :
+			hlen += sizeof(tcphdr_t);
+			break;
+		case IPPROTO_UDP :
+			hlen += sizeof(udphdr_t);
+			break;
+		case IPPROTO_ICMP :
+			hlen += sizeof(icmphdr_t);
+			break;
+		default :
+			break;
+		}
+	/*
+	 * If we don't have enough data in the mblk or we haven't yet copied
+	 * enough (above), then copy some more.
+	 */
+	if ((hlen > len)) {
+		len = MIN(hlen, sizeof(lbuf));
+		len = MIN(mlen, len);
+		copyout_mblk(m, 0, lbuf, len);
+		frstats[out].fr_pull[0]++;
+		ip = (ip_t *)lbuf;
+	}
+
+#ifndef	sparc
+	__iplen = ip->ip_len;
+	ip->ip_len = ntohs(__iplen);
+	__ipoff = ip->ip_off;
+	ip->ip_off = ntohs(__ipoff);
+#endif
+
+	if ((iphlen < sizeof(ip_t)) || (iphlen > (u_short)ip->ip_len) ||
+	    (mlen < (u_short)ip->ip_len)) {
+		/*
+		 * Bad IP packet or not enough data/data length mismatches
+		 */
+		m->b_rptr -= off;
+		frstats[out].fr_bad++;
+		return -1;
+	}
+
+	qif->qf_m = m;
+	qif->qf_len = len;
+	err = fr_check(ip, iphlen, qif->qf_ill, out, qif, q, mp);
+	/*
+	 * Copy back the ip header data if it was changed, we haven't yet
+	 * freed the message and we aren't going to drop the packet.
+	 */
+#ifndef	sparc
+	if (*mp) {
+		ip->ip_len = __iplen;
+		ip->ip_off = __ipoff;
+	}
+#endif
+	if (err == 1) {
+		if (*mp && (ip == (ip_t *)lbuf)) {
+			copyin_mblk(m, 0, lbuf, len);
+			frstats[out].fr_pull[1]++;
+		}
+		err = 0;
+	}
+	m->b_rptr -= off;
+	return err;
+}
+
+
+int fr_qin(q, mb)
+queue_t *q;
+mblk_t *mb;
+{
+	int (*pnext)(), type, synced = 0;
+	qif_t qfb, *qif;
+
+again:
+	mutex_enter(&ipfs_mutex);
+	while (!(qif = qif_from_queue(q))) {
+		for (qif = qif_head; qif; qif = qif->qf_next)
+			if (qif->qf_rqinfo == q->q_qinfo && qif->qf_inp) {
+				pnext = qif->qf_inp;
+				mutex_exit(&ipfs_mutex);
+				frstats[0].fr_notip++;
+				if (!synced) {
+					ipfsync();
+					synced = 1;
+					goto again;
+				}
+				/* fr_donotip(0, NULL, q, mb, mb, NULL, 0); */
+				return (*pnext)(q, mb);
+			}
+		mutex_exit(&ipfs_mutex);
+		if (!synced) {
+			ipfsync();
+			synced = 1;
+			goto again;
+		}
+		cmn_err(CE_WARN,
+			"IP Filter: dropped: fr_qin(%x,%x): type %x qif %x",
+			q, mb, MTYPE(mb), qif);
+		cmn_err(CE_CONT, "info %x next %x ptr %x fsrv %x bsrv %x\n",
+			q->q_qinfo, q->q_next, q->q_ptr, q->q_nfsrv,
+			q->q_nbsrv);
+		cmn_err(CE_CONT, "IP Filter: info: putp %x srvp %x info %x\n",
+			q->q_qinfo->qi_putp, q->q_qinfo->qi_srvp,
+			q->q_qinfo->qi_infop);
+		frstats[0].fr_drop++;
+		freemsg(mb);
+		return 0;
+	}
+	/*
+	 * So we can be more re-entrant.
+	 */
+	bcopy((char *)qif, (char *)&qfb, sizeof(*qif));
+	mutex_exit(&ipfs_mutex);
+	qif = &qfb;
+	pnext = qif->qf_inp;
+
+	type = MTYPE(mb);
+	if (type == M_DATA || type == M_PROTO || type == M_PCPROTO)
+		if (fr_precheck(&mb, q, qif, 0)) {
+			if (mb)
+				freemsg(mb);
+			return 0;
+		}
+
+	if (mb) {
+		if (pnext)
+			return (*pnext)(q, mb);
+
+		cmn_err(CE_WARN, "IP Filter: inp NULL: qif %x %s q %x info %x",
+			qif, qif->qf_name, q, q->q_qinfo);
+		freemsg(mb);
+	}
+	return 0;
+}
+
+
+int fr_qout(q, mb)
+queue_t *q;
+mblk_t *mb;
+{
+	int (*pnext)(), type, synced = 0;
+	qif_t qfb, *qif;
+
+again:
+	mutex_enter(&ipfs_mutex);
+	if (!(qif = qif_from_queue(q))) {
+		for (qif = qif_head; qif; qif = qif->qf_next)
+			if (qif->qf_wqinfo == q->q_qinfo && qif->qf_outp) {
+				pnext = qif->qf_outp;
+				mutex_exit(&ipfs_mutex);
+				frstats[1].fr_notip++;
+				if (!synced) {
+					ipfsync();
+					synced = 1;
+					goto again;
+				}
+				/* fr_donotip(0, NULL, q, mb, mb, NULL, 0); */
+				return (*pnext)(q, mb);
+			}
+		mutex_exit(&ipfs_mutex);
+		if (!synced) {
+			ipfsync();
+			synced = 1;
+			goto again;
+		}
+		cmn_err(CE_WARN,
+			"IP Filter: dropped: fr_qout(%x,%x): type %x: qif %x",
+			q, mb, MTYPE(mb), qif);
+		cmn_err(CE_CONT, "info %x next %x ptr %x fsrv %x bsrv %x\n",
+			q->q_qinfo, q->q_next, q->q_ptr, q->q_nfsrv,
+			q->q_nbsrv);
+		cmn_err(CE_CONT, "IP Filter: info: putp %x srvp %x info %x\n",
+			q->q_qinfo->qi_putp, q->q_qinfo->qi_srvp,
+			q->q_qinfo->qi_infop);
+		if (q->q_nfsrv)
+			cmn_err(CE_CONT, "nfsrv: info %x next %x ptr %x\n",
+				q->q_nfsrv->q_qinfo, q->q_nfsrv->q_next,
+				q->q_nfsrv->q_ptr);
+		if (q->q_nbsrv)
+			cmn_err(CE_CONT, "nbsrv: info %x next %x ptr %x\n",
+				q->q_nbsrv->q_qinfo, q->q_nbsrv->q_next,
+				q->q_nbsrv->q_ptr);
+		frstats[1].fr_drop++;
+		freemsg(mb);
+		return 0;
+	}
+	/*
+	 * So we can be more re-entrant.
+	 */
+	bcopy((char *)qif, (char *)&qfb, sizeof(*qif));
+	mutex_exit(&ipfs_mutex);
+	qif = &qfb;
+	pnext = qif->qf_outp;
+
+	type = MTYPE(mb);
+	if (type == M_DATA || type == M_PROTO || type == M_PCPROTO)
+		if (fr_precheck(&mb, q, qif, 1)) {
+			if (mb)
+				freemsg(mb);
+			return 0;
+		}
+
+	if (mb) {
+		if (pnext)
+			return (*pnext)(q, mb);
+
+		cmn_err(CE_WARN, "IP Filter: outp NULL: qif %x %s q %x info %x",
+			qif, qif->qf_name, q, q->q_qinfo);
+		freemsg(mb);
+	}
+	return 0;
+}
+
+
+/*
+ * attach the packet filter to each interface that is defined as having an
+ * IP address associated with it and save some of the info. for that struct
+ * so we're not out of date as soon as te ill disappears - but we must sync
+ * to be correct!
+ */
+int solattach()
+{
+	queue_t *in, *out;
+	qif_t *qif, *qf2;
+	ill_t *il;
+
+	for (il = ill_g_head; il; il = il->ill_next) {
+		in = il->ill_rq;
+		if (!in || !il->ill_wq)
+			continue;
+
+		out = il->ill_wq->q_next;
+
+		mutex_enter(&ipfs_mutex);
+		/*
+		 * Look for entry already setup for this device
+		 */
+		for (qif = qif_head; qif; qif = qif->qf_next)
+			if (qif->qf_iptr == in->q_ptr &&
+			    qif->qf_optr == out->q_ptr)
+				break;
+		if (qif) {
+			mutex_exit(&ipfs_mutex);
+			continue;
+		}
+#ifdef	IPFDEBUG
+		cmn_err(CE_NOTE,
+			"IP Filter: il %x ipt %x opt %x ipu %x opu %x i %x/%x",
+			il, in->q_ptr,  out->q_ptr, in->q_qinfo->qi_putp,
+			out->q_qinfo->qi_putp, out->q_qinfo, in->q_qinfo);
+#endif
+		qif = (qif_t *)KMALLOC(sizeof(*qif));
+
+		if (in->q_qinfo->qi_putp == fr_qin) {
+			for (qf2 = qif_head; qf2; qf2 = qf2->qf_next)
+				if (qf2->qf_rqinfo == in->q_qinfo) {
+					qif->qf_inp = qf2->qf_inp;
+					break;
+				}
+			if (!qf2) {
+#ifdef	IPFDEBUG
+				cmn_err(CE_WARN,
+					"IP Filter: rq:%s put %x qi %x",
+					il->ill_name, in->q_qinfo->qi_putp,
+					in->q_qinfo);
+#endif
+				mutex_exit(&ipfs_mutex);
+				KFREE(qif);
+				continue;
+			}
+		} else
+			qif->qf_inp = in->q_qinfo->qi_putp;
+
+		if (out->q_qinfo->qi_putp == fr_qout) {
+			for (qf2 = qif_head; qf2; qf2 = qf2->qf_next)
+				if (qf2->qf_wqinfo == out->q_qinfo) {
+					qif->qf_outp = qf2->qf_outp;
+					break;
+				}
+			if (!qf2) {
+#ifdef	IPFDEBUG
+				cmn_err(CE_WARN,
+					"IP Filter: wq:%s put %x qi %x",
+					il->ill_name, out->q_qinfo->qi_putp,
+					out->q_qinfo);
+#endif
+				mutex_exit(&ipfs_mutex);
+				KFREE(qif);
+				continue;
+			}
+		} else
+			qif->qf_outp = out->q_qinfo->qi_putp;
+
+		qif->qf_ill = il;
+		qif->qf_iptr = in->q_ptr;
+		qif->qf_optr = out->q_ptr;
+		qif->qf_hl = il->ill_hdr_length;
+		strncpy(qif->qf_name, il->ill_name, sizeof(qif->qf_name));
+		qif->qf_name[sizeof(qif->qf_name) - 1] = '\0';
+		qif->qf_wqinfo = out->q_qinfo;
+		qif->qf_rqinfo = in->q_qinfo;
+
+		qif->qf_next = qif_head;
+		qif_head = qif;
+		in->q_qinfo->qi_putp = fr_qin;
+		out->q_qinfo->qi_putp = fr_qout;
+		mutex_exit(&ipfs_mutex);
+		cmn_err(CE_CONT, "IP Filter: attach to [%s,%d]\n",
+			qif->qf_name, il->ill_ppa);
+	}
+	if (!qif_head) {
+		cmn_err(CE_CONT, "IP Filter: not attached to any interfaces\n");
+		return -1;
+	}
+	return 0;
+}
+
+
+/*
+ * look for bad consistancies between the list of interfaces the filter knows
+ * about and those which are currently configured.
+ */
+int ipfsync()
+{
+	register struct frentry *f, **fp;
+	register qif_t *qif, **qp;
+	register ill_t *il;
+
+	mutex_enter(&ipfs_mutex);
+	for (qp = &qif_head; (qif = *qp); ) {
+		for (il = ill_g_head; il; il = il->ill_next)
+			if ((qif->qf_ill == il) &&
+			    !strcmp(qif->qf_name, il->ill_name)) {
+				mblk_t	*m = il->ill_hdr_mp;
+
+				qif->qf_hl = il->ill_hdr_length;
+				if (m && qif->qf_hl != (m->b_wptr - m->b_rptr))
+					printf("ILL Header Length Mismatch\n");
+				break;
+			}
+		if (il) {
+			qp = &qif->qf_next;
+			continue;
+		}
+		cmn_err(CE_CONT, "IP Filter: detaching [%s]\n", qif->qf_name);
+		*qp = qif->qf_next;
+
+		/*
+		 * Delete any rules directly associated with this interface
+		 */
+		mutex_enter(&ipf_mutex);
+		for (fp = &ipfilter[0][0]; (f = *fp); )
+			if ((void *)f->fr_ifa == (void *)qif->qf_ill) {
+				*fp = f->fr_next;
+				KFREE(f);
+			} else
+				fp = &f->fr_next;
+		for (fp = &ipfilter[1][0]; (f = *fp); )
+			if ((void *)f->fr_ifa == (void *)qif->qf_ill) {
+				*fp = f->fr_next;
+				KFREE(f);
+			} else
+				fp = &f->fr_next;
+		mutex_exit(&ipf_mutex);
+
+		KFREE(qif);
+		qif = *qp;
+	}
+	mutex_exit(&ipfs_mutex);
+	return solattach();
+}
+
+
+/*
+ * unhook the IP filter from all defined interfaces with IP addresses
+ */
+int soldetach()
+{
+	queue_t *in, *out;
+	qif_t *qif, *qf2, **qp;
+	ill_t *il;
+
+	mutex_enter(&ipfs_mutex);
+	/*
+	 * Make two passes, first get rid of all the unknown devices, next
+	 * unlink known devices.
+	 */
+	for (qp = &qif_head; (qif = *qp); ) {
+		for (il = ill_g_head; il; il = il->ill_next)
+			if (qif->qf_ill == il)
+				break;
+		if (il) {
+			qp = &qif->qf_next;
+			continue;
+		}
+		cmn_err(CE_CONT, "IP Filter: removing [%s]\n", qif->qf_name);
+		*qp = qif->qf_next;
+		KFREE(qif);
+	}
+
+	while ((qif = qif_head)) {
+		qif_head = qif->qf_next;
+		for (il = ill_g_head; il; il = il->ill_next)
+			if (qif->qf_ill == il)
+				break;
+		if (il) {
+			in = il->ill_rq;
+			out = il->ill_wq->q_next;
+			printf("IP Filter: detaching [%s,%d]\n", qif->qf_name,
+				il->ill_ppa);
+			in->q_qinfo->qi_putp = qif->qf_inp;
+			/*
+			 * and change back if something is still interested
+			 * in filtering (read side) on this interface.
+			 */
+			for (qf2 = qif_head; qf2; qf2 = qf2->qf_next)
+				if (qf2->qf_rqinfo == in->q_qinfo) {
+					in->q_qinfo->qi_putp = fr_qin;
+					break;
+				}
+			/*
+			 * and the write queue...
+			 */
+			out->q_qinfo->qi_putp = qif->qf_outp;
+			for (qf2 = qif_head; qf2; qf2 = qf2->qf_next)
+				if (qf2->qf_wqinfo == out->q_qinfo) {
+					out->q_qinfo->qi_putp = fr_qout;
+					break;
+				}
+
+		}
+		KFREE(qif);
+	}
+	mutex_exit(&ipfs_mutex);
+	return ipldetach();
+}
+
+
+printire(ire)
+ire_t *ire;
+{
+	printf("ire: ll_hdr_mp %x rfq %x stq %x src_addr %x max_frag %d\n",
+		ire->ire_ll_hdr_mp, ire->ire_rfq, ire->ire_stq,
+		ire->ire_src_addr, ire->ire_max_frag);
+	printf("ire: mask %x addr %x gateway_addr %x type %d\n",
+		ire->ire_mask, ire->ire_addr, ire->ire_gateway_addr,
+		ire->ire_type);
+	printf("ire: ll_hdr_length %d ll_hdr_saved_mp %x\n",
+		ire->ire_ll_hdr_length, ire->ire_ll_hdr_saved_mp);
+}
+
+
+int ipfr_fastroute(qf, ip, mb, mpp, fin, fdp)
+qif_t *qf;
+ip_t *ip;
+mblk_t *mb, **mpp;
+fr_info_t *fin;
+frdest_t *fdp;
+{
+	mblk_t *mp = NULL;
+	struct in_addr dst;
+	ire_t *ir, *dir;
+	int hlen = 0;
+	u_char	*s;
+	queue_t *q = NULL;
+
+#ifndef	sparc
+	u_short __iplen, __ipoff;
+
+	/*
+	 * If this is a duplicate mblk then we want ip to point at that
+	 * data, not the original, if and only if it is already pointing at
+	 * the current mblk data.
+	 */
+	if (ip == (ip_t *)qf->qf_m->b_rptr && qf->qf_m != mb)
+		ip = (ip_t *)mb->b_rptr;
+	/*
+	 * In fr_precheck(), we modify ip_len and ip_off in an aligned data
+	 * area.  However, we only need to change it back if we didn't copy
+	 * the IP header data out.
+	 */
+	
+	__iplen = (u_short)ip->ip_len,
+	__ipoff = (u_short)ip->ip_off;
+
+	ip->ip_len = htons(__iplen);
+	ip->ip_off = htons(__ipoff);
+#endif
+
+	if (ip != (ip_t *)mb->b_rptr) {
+		copyin_mblk(mb, 0, ip, qf->qf_len);
+		frstats[fin->fin_out].fr_pull[1]++;
+	}
+
+	/*
+	 * If there is another M_PROTO, we don't want it
+	 */
+	if (*mpp != mb) {
+		(*mpp)->b_cont = NULL;
+		freemsg(*mpp);
+	}
+
+	ir = (ire_t *)fdp->fd_ifp;
+
+	if (fdp->fd_ip.s_addr)
+		dst = fdp->fd_ip;
+	else
+		dst = fin->fin_fi.fi_dst;
+
+	if (dir = ire_lookup(dst.s_addr))
+		if (!dir->ire_ll_hdr_mp || !dir->ire_ll_hdr_length)
+			dir = NULL;
+
+	if (!ir)
+		ir = dir;
+
+	if (ir && dir) {
+		if ((mp = dir->ire_ll_hdr_mp)) {
+			hlen = dir->ire_ll_hdr_length;
+
+			s = mb->b_rptr;
+
+			if (hlen && (s - mb->b_datap->db_base) >= hlen) {
+				s -= hlen;
+				mb->b_rptr = (u_char *)s;
+				bcopy((char *)mp->b_rptr, (char *)s, hlen);
+			} else {
+				mblk_t	*mp2;
+
+				mp2 = copyb(mp);
+				if (!mp2)
+					goto bad_fastroute;
+				mp2->b_cont = mb;
+				mb = mp2;
+			}
+		}
+
+		if (ir->ire_stq)
+			q = ir->ire_stq;
+		else if (ir->ire_rfq)
+			q = WR(ir->ire_rfq);
+		if (q) {
+			putnext(q, mb);
+			return 0;
+		}
+	}
+bad_fastroute:
+	return -1;
+}
+
+
+void copyout_mblk(m, off, buf, len)
+mblk_t *m;
+int off, len;
+char *buf;
+{
+	char *s, *bp = buf;
+	int mlen, olen, clen;
+
+	for (; m && len; m = m->b_cont) {
+		if (MTYPE(m) != M_DATA)
+			continue;
+		s = m->b_rptr;
+		mlen = (char *)m->b_wptr - s;
+		olen = MIN(off, mlen);
+		if ((olen == mlen) || (olen < off)) {
+			off -= olen;
+			continue;
+		} else if (olen) {
+			off -= olen;
+			s += olen;
+			mlen -= olen;
+		}
+		clen = MIN(mlen, len);
+		bcopy(s, bp, clen);
+		len -= clen;
+		bp += clen;
+	}
+}
+
+
+void copyin_mblk(m, off, buf, len)
+mblk_t *m;
+int off, len;
+char *buf;
+{
+	char *s, *bp = buf;
+	int mlen, olen, clen;
+
+	for (; m && len; m = m->b_cont) {
+		if (MTYPE(m) != M_DATA)
+			continue;
+		s = m->b_rptr;
+		mlen = (char *)m->b_wptr - s;
+		olen = MIN(off, mlen);
+		if ((olen == mlen) || (olen < off)) {
+			off -= olen;
+			continue;
+		} else if (olen) {
+			off -= olen;
+			s += olen;
+			mlen -= olen;
+		}
+		clen = MIN(mlen, len);
+		bcopy(bp, s, clen);
+		len -= clen;
+		bp += clen;
+	}
+}
diff --git a/contrib/ipfilter/test/Makefile b/contrib/ipfilter/test/Makefile
new file mode 100644
index 0000000..d3bdcc2
--- /dev/null
+++ b/contrib/ipfilter/test/Makefile
@@ -0,0 +1,39 @@
+#
+# (C)opyright 1993-1996 by Darren Reed.
+#
+# This code may be freely distributed as long as it retains this notice
+# and is not changed in any way.  The author accepts no responsibility
+# for the use of this software.  I hate legaleese, don't you ?
+#
+# where to put things.
+#
+BINDEST=/usr/local/bin
+SBINDEST=/sbin
+MANDIR=/usr/share/man
+
+tests: first 0 ftests ptests
+
+first:
+	-mkdir -p results
+
+# Filtering tests
+ftests: 1 2 3 4 5 6 7 8 9 10 11 12
+
+# Rule parsing tests
+ptests: i1 i2 i3 i4 i5 i6 i7 i8 i9 i10 i11
+
+0:
+	@(cd ..; make ipftest; )
+
+1 2 3 4 5 6 7 8 9 10 11:
+	@./dotest $@
+
+12:
+	@./hextest $@
+
+i1 i2 i3 i4 i5 i6 i7 i8 i9 i10 i11:
+	@./itest $@
+
+clean:
+	/bin/rm -f 1 2 3 4 5 6 7 8 9 10 11 12 results/*
+	/bin/rm -f i1 i2 i3 i4 i5 i6 i7 i8 i9 i10 i11
diff --git a/contrib/ipfilter/test/dotest b/contrib/ipfilter/test/dotest
new file mode 100644
index 0000000..06d04c5
--- /dev/null
+++ b/contrib/ipfilter/test/dotest
@@ -0,0 +1,26 @@
+#!/bin/sh
+if [ -f /usr/ucb/touch ] ; then
+	TOUCH=/usr/ucb/touch
+else
+	if [ -f /usr/bin/touch ] ; then
+		TOUCH=/usr/bin/touch
+	else
+		if [ -f /bin/touch ] ; then
+			TOUCH=/bin/touch
+		fi
+	fi
+fi
+echo "$1...";
+/bin/cp /dev/null results/$1
+( while read rule; do
+	echo "$rule" | ../ipftest -br - -i input/$1 >> results/$1;
+	if [ $? -ne 0 ] ; then
+		exit 1;
+	fi
+done ) < regress/$1
+cmp expected/$1 results/$1
+status=$?
+if [ $status = 0 ] ; then
+	$TOUCH $1
+fi
+exit $status
diff --git a/contrib/ipfilter/test/expected/1 b/contrib/ipfilter/test/expected/1
new file mode 100644
index 0000000..93b7333
--- /dev/null
+++ b/contrib/ipfilter/test/expected/1
@@ -0,0 +1,16 @@
+block
+block
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+pass
+pass
diff --git a/contrib/ipfilter/test/expected/10 b/contrib/ipfilter/test/expected/10
new file mode 100644
index 0000000..bc0d83e
--- /dev/null
+++ b/contrib/ipfilter/test/expected/10
@@ -0,0 +1,108 @@
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
+nomatch
+nomatch
+pass
+block
+block
+block
+nomatch
+nomatch
+block
+pass
+pass
+pass
+nomatch
+nomatch
+pass
+block
+block
+nomatch
+nomatch
+nomatch
+block
+pass
+pass
+nomatch
+nomatch
+nomatch
+pass
+block
+block
+block
+block
+block
+block
+pass
+pass
+pass
+pass
+pass
+pass
+nomatch
+block
+block
+block
+nomatch
+block
+nomatch
+pass
+pass
+pass
+nomatch
+pass
+nomatch
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
+block
+block
+nomatch
+pass
+pass
+pass
+pass
+pass
+block
+block
+nomatch
+block
+nomatch
+block
+pass
+pass
+nomatch
+pass
+nomatch
+pass
+block
+block
+block
+block
+block
+block
+pass
+pass
+pass
+pass
+pass
+pass
+block
+block
+block
+nomatch
+nomatch
+block
diff --git a/contrib/ipfilter/test/expected/11 b/contrib/ipfilter/test/expected/11
new file mode 100644
index 0000000..eb00875
--- /dev/null
+++ b/contrib/ipfilter/test/expected/11
@@ -0,0 +1,66 @@
+pass
+pass
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
+nomatch
+nomatch
diff --git a/contrib/ipfilter/test/expected/12 b/contrib/ipfilter/test/expected/12
new file mode 100644
index 0000000..f94cf76
--- /dev/null
+++ b/contrib/ipfilter/test/expected/12
@@ -0,0 +1,54 @@
+pass
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+nomatch
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
diff --git a/contrib/ipfilter/test/expected/2 b/contrib/ipfilter/test/expected/2
new file mode 100644
index 0000000..03b71cd
--- /dev/null
+++ b/contrib/ipfilter/test/expected/2
@@ -0,0 +1,36 @@
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
diff --git a/contrib/ipfilter/test/expected/3 b/contrib/ipfilter/test/expected/3
new file mode 100644
index 0000000..d06d92b
--- /dev/null
+++ b/contrib/ipfilter/test/expected/3
@@ -0,0 +1,40 @@
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+block
+block
+block
+nomatch
+nomatch
+pass
+pass
+pass
+nomatch
+block
+block
+block
+block
+block
+pass
+pass
+pass
+pass
+pass
diff --git a/contrib/ipfilter/test/expected/4 b/contrib/ipfilter/test/expected/4
new file mode 100644
index 0000000..d06d92b
--- /dev/null
+++ b/contrib/ipfilter/test/expected/4
@@ -0,0 +1,40 @@
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
+nomatch
+nomatch
+block
+block
+block
+nomatch
+nomatch
+pass
+pass
+pass
+nomatch
+block
+block
+block
+block
+block
+pass
+pass
+pass
+pass
+pass
diff --git a/contrib/ipfilter/test/expected/5 b/contrib/ipfilter/test/expected/5
new file mode 100644
index 0000000..bc80580
--- /dev/null
+++ b/contrib/ipfilter/test/expected/5
@@ -0,0 +1,1344 @@
+nomatch
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+pass
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
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+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+pass
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
+pass
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
+block
+block
+block
+block
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+block
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+nomatch
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+nomatch
+block
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+nomatch
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+block
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+nomatch
+nomatch
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+nomatch
+pass
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
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+nomatch
+nomatch
+nomatch
+pass
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+nomatch
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+nomatch
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+nomatch
+block
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+block
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+nomatch
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+nomatch
+nomatch
+nomatch
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+nomatch
+nomatch
+block
+block
+block
+nomatch
+nomatch
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+block
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+nomatch
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+pass
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+nomatch
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+block
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+nomatch
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+block
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
diff --git a/contrib/ipfilter/test/expected/7 b/contrib/ipfilter/test/expected/7
new file mode 100644
index 0000000..c53d6ea
--- /dev/null
+++ b/contrib/ipfilter/test/expected/7
@@ -0,0 +1,54 @@
+block
+block
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
+nomatch
+nomatch
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+block
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+nomatch
+pass
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+block
+block
+block
+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+pass
+pass
+pass
diff --git a/contrib/ipfilter/test/expected/8 b/contrib/ipfilter/test/expected/8
new file mode 100644
index 0000000..398058a
--- /dev/null
+++ b/contrib/ipfilter/test/expected/8
@@ -0,0 +1,36 @@
+block
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+pass
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+nomatch
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+pass
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
diff --git a/contrib/ipfilter/test/expected/9 b/contrib/ipfilter/test/expected/9
new file mode 100644
index 0000000..a4572e6
--- /dev/null
+++ b/contrib/ipfilter/test/expected/9
@@ -0,0 +1,108 @@
+block
+block
+block
+block
+block
+block
+nomatch
+nomatch
+nomatch
+pass
+pass
+nomatch
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+block
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+nomatch
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+nomatch
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+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+nomatch
+block
+block
+nomatch
diff --git a/contrib/ipfilter/test/expected/i1 b/contrib/ipfilter/test/expected/i1
new file mode 100644
index 0000000..f69e055
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i1
@@ -0,0 +1,11 @@
+pass in from any to any
+block out from any to any
+log in from any to any
+log body in from any to any
+count in from any to any
+pass in on ed0(!) from 127.0.0.1/32 to 127.0.0.1/32
+block in log first on lo0(!) from any to any
+pass in log body quick from any to any
+block return-rst in quick on le0(!) proto tcp from any to any
+block return-icmp in on qe0(!) from any to any
+block return-icmp(host-unr) in on qe0(!) from any to any
diff --git a/contrib/ipfilter/test/expected/i10 b/contrib/ipfilter/test/expected/i10
new file mode 100644
index 0000000..57bd4ef
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i10
@@ -0,0 +1,4 @@
+pass in from 127.0.0.1/32 to 127.0.0.1/32 with opt sec
+block in from any to any with not opt sec-class topsecret
+block in from any to any with not opt sec-class topsecret,secret
+pass in from any to any with opt sec-class topsecret,confid not opt sec-class unclass
diff --git a/contrib/ipfilter/test/expected/i11 b/contrib/ipfilter/test/expected/i11
new file mode 100644
index 0000000..9268c66
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i11
@@ -0,0 +1,4 @@
+pass in on ed0(!) proto tcp from 127.0.0.1/32 to 127.0.0.1/32 port = 23 keep state
+block in log first on lo0(!) proto tcp/udp from any to any keep state
+pass in proto udp from 127.0.0.1/32 to 127.0.0.1/32 port = 2049 keep frags
+pass in proto udp from 127.0.0.1/32 to 127.0.0.1/32 port = 53 keep state keep frags
diff --git a/contrib/ipfilter/test/expected/i2 b/contrib/ipfilter/test/expected/i2
new file mode 100644
index 0000000..9d3398d
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i2
@@ -0,0 +1,6 @@
+log in proto tcp from any to any
+pass in proto tcp from any to any
+pass in proto udp from 127.0.0.1/32 to 127.0.0.1/32
+block in proto udp from any to any
+block in proto 250 from any to any
+pass in proto tcp/udp from any to any
diff --git a/contrib/ipfilter/test/expected/i3 b/contrib/ipfilter/test/expected/i3
new file mode 100644
index 0000000..4d70a94
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i3
@@ -0,0 +1,8 @@
+log in from any to any
+pass in from 128.0.0.0/24 to 128.0.0.0/16
+pass in from 128.0.0.0/24 to 128.0.0.0/16
+pass in from 128.0.0.0/24 to 128.0.0.0/16
+pass in from 128.0.0.0/24 to 128.0.0.0/16
+pass in from 128.0.0.0/24 to 128.0.0.0/16
+pass in from 127.0.0.1/32 to 127.0.0.1/32
+block in log from any to any
diff --git a/contrib/ipfilter/test/expected/i4 b/contrib/ipfilter/test/expected/i4
new file mode 100644
index 0000000..dfa3674
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i4
@@ -0,0 +1,7 @@
+log in proto tcp from any port > 0 to any
+log in proto tcp from any to any port > 0
+pass in proto tcp from any port != 0 to any port 0 >< 65535
+pass in proto udp from 127.0.0.1/32 port > 32000 to 127.0.0.1/32 port < 29000
+block in proto udp from any port != 123 to any port < 123
+block in proto tcp from any port = 25 to any port > 25
+pass in proto tcp/udp from any port 1 >< 3 to any port 1 <> 3
diff --git a/contrib/ipfilter/test/expected/i5 b/contrib/ipfilter/test/expected/i5
new file mode 100644
index 0000000..3bcb10b
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i5
@@ -0,0 +1,5 @@
+log in from any to any
+count in tos 0x80 from any to any
+pass in on ed0(!) tos 0x40 from 127.0.0.1/32 to 127.0.0.1/32
+block in log on lo0(!) ttl 0 from any to any
+pass in quick ttl 1 from any to any
diff --git a/contrib/ipfilter/test/expected/i6 b/contrib/ipfilter/test/expected/i6
new file mode 100644
index 0000000..4849626
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i6
@@ -0,0 +1,4 @@
+pass in on lo0(!) fastroute from any to any
+pass in on lo0(!) dup-to qe0(!) from 127.0.0.1/32 to 127.0.0.1/32
+pass in on qe0(!) dup-to qe0(!):127.0.0.1 from 127.0.0.1/32 to 127.0.0.1/32
+block in quick on qe0(!) to qe1(!) from any to any
diff --git a/contrib/ipfilter/test/expected/i7 b/contrib/ipfilter/test/expected/i7
new file mode 100644
index 0000000..2414f57
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i7
@@ -0,0 +1,3 @@
+pass in on ed0(!) proto tcp from 127.0.0.1/32 to 127.0.0.1/32 port = 23 flags S/SA
+block in on lo0(!) proto tcp from any to any flags A/FSRPAU
+pass in on lo0(!) proto tcp from any to any flags /SPA
diff --git a/contrib/ipfilter/test/expected/i8 b/contrib/ipfilter/test/expected/i8
new file mode 100644
index 0000000..77dc177
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i8
@@ -0,0 +1,2 @@
+pass in proto icmp from 127.0.0.1/32 to 127.0.0.1/32 icmp-type timest
+block in proto icmp from any to any icmp-type unreach code 1
diff --git a/contrib/ipfilter/test/expected/i9 b/contrib/ipfilter/test/expected/i9
new file mode 100644
index 0000000..b36d864
--- /dev/null
+++ b/contrib/ipfilter/test/expected/i9
@@ -0,0 +1,5 @@
+pass in from 127.0.0.1/32 to 127.0.0.1/32 with short
+block in from any to any with ipopt
+pass in from any to any with opt nop,rr,zsu
+pass in from any to any with opt nop,rr,zsu not opt lsrr,ssrr
+pass in from 127.0.0.1/32 to 127.0.0.1/32 with not frag
diff --git a/contrib/ipfilter/test/hextest b/contrib/ipfilter/test/hextest
new file mode 100644
index 0000000..76e1af5
--- /dev/null
+++ b/contrib/ipfilter/test/hextest
@@ -0,0 +1,23 @@
+#!/bin/sh
+if [ -f /usr/ucb/touch ] ; then
+	TOUCH=/usr/ucb/touch
+else
+	if [ -f /usr/bin/touch ] ; then
+		TOUCH=/usr/bin/touch
+	else
+		if [ -f /bin/touch ] ; then
+			TOUCH=/bin/touch
+		fi
+	fi
+fi
+echo "$1...";
+/bin/cp /dev/null results/$1
+( while read rule; do
+	echo "$rule" | ../ipftest -br - -Hi input/$1 >> results/$1;
+done ) < regress/$1
+cmp expected/$1 results/$1
+status=$?
+if [ $status = 0 ] ; then
+	$TOUCH $1
+fi
+exit $status
diff --git a/contrib/ipfilter/test/input/1 b/contrib/ipfilter/test/input/1
new file mode 100644
index 0000000..7c3ae8a
--- /dev/null
+++ b/contrib/ipfilter/test/input/1
@@ -0,0 +1,4 @@
+in 127.0.0.1 127.0.0.1
+in 1.1.1.1 1.2.1.1
+out 127.0.0.1 127.0.0.1
+out 1.1.1.1 1.2.1.1
diff --git a/contrib/ipfilter/test/input/10 b/contrib/ipfilter/test/input/10
new file mode 100644
index 0000000..254cee7
--- /dev/null
+++ b/contrib/ipfilter/test/input/10
@@ -0,0 +1,6 @@
+in 1.1.1.1 2.1.1.1 opt lsrr
+in 1.1.1.1 2.1.1.1
+in 1.1.1.1 2.1.1.1 opt ts
+in 1.1.1.1 2.1.1.1 opt sec-class=topsecret
+in 1.1.1.1 2.1.1.1 opt ssrr,sec-class=topsecret
+in 1.1.1.1 2.1.1.1 opt sec
diff --git a/contrib/ipfilter/test/input/11 b/contrib/ipfilter/test/input/11
new file mode 100644
index 0000000..b6e2c1d
--- /dev/null
+++ b/contrib/ipfilter/test/input/11
@@ -0,0 +1,11 @@
+in tcp 1.1.1.1,1 2.1.2.2,23 S
+in tcp 1.1.1.1,1 2.1.2.2,23 A
+in tcp 2.1.2.2,23 1.1.1.1,1 A
+in tcp 1.1.1.1,1 2.1.2.2,23 F
+in tcp 1.1.1.1,1 2.1.2.2,23 A
+in tcp 1.1.1.1,2 2.1.2.2,23 A
+in udp 1.1.1.1,1 4.4.4.4,53
+in udp 2.2.2.2,2 4.4.4.4,53
+in udp 4.4.4.4,53 1.1.1.1,1
+in udp 4.4.4.4,1023 1.1.1.1,2049
+in udp 4.4.4.4,2049 1.1.1.1,1023
diff --git a/contrib/ipfilter/test/input/12 b/contrib/ipfilter/test/input/12
new file mode 100644
index 0000000..5d9c1de
--- /dev/null
+++ b/contrib/ipfilter/test/input/12
@@ -0,0 +1,35 @@
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF  SYN
+45 00 0028 0000 4000 3f 06 0000 01010101 02010101
+0401 0019 00000000 00000000 50 02 2000 0000 0000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF  ACK
+45 00 0028 0000 4000 3f 06 0000 01010101 02010101
+0401 0019 00000000 00000000 50 10 2000 0000 0000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF MF FO=0 ACK
+45 00 0028 0000 6000 3f 06 0000 01010101 02010101
+0401 0019 00000000 00000000 50 10 2000 0000 0000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF FO=0
+45 00 001c 0000 6000 3f 06 0000 01010101 02010101
+0401 0019 00000000
+
+# 1.1.1.1 -> 2.1.1.1 TTL=63 TCP DF FO=1 ACK
+45 00 001c 0000 6001 3f 06 0000 01010101 02010101
+00000000 50 10 2000
+
+# 1.1.1.1 -> 2.1.1.1 TTL=63 UDP DF MF FO=0
+45 00 0014 0000 6000 3f 11 0000 01010101 02010101
+
+# 1.1.1.1,53 -> 2.1.1.1,53 TTL=63 UDP MF FO=0
+45 00 0018 0000 2000 3f 11 0000 01010101 02010101
+0035 0035
+
+# 1.1.1.1,1 -> 2.1.1.1,1 TTL=63 UDP MF FO=0
+45 00 001c 0000 2000 3f 11 0000 01010101 02010101
+0001 0001 0004 0000
+
+# 1.1.1.1,53 -> 2.1.1.1,53 TTL=63 UDP MF FO=0
+45 00 001c 0000 2000 3f 11 0000 01010101 02010101
+0035 0035 0004 0000
+
diff --git a/contrib/ipfilter/test/input/13 b/contrib/ipfilter/test/input/13
new file mode 100644
index 0000000..56ec16d
--- /dev/null
+++ b/contrib/ipfilter/test/input/13
@@ -0,0 +1,39 @@
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF,MF,FO=0  SYN
+45 00 0028 0001 4000 3f 06 0000 01010101 02010101
+0401 0019 00000000 00000000 50 02 2000 0000 0000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP MF  ACK
+45 00 0024 0002 2000 3f 06 0000 01010101 02010101
+0401001900000000 0000000050102000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP FO=2  ACK
+45 00 002c 0002 0002 3f 06 0000 01010101 02010101
+0000000000010203 0405060708090a0b 0c0d0e0f10111213
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF MF FO=0 SYN
+45 00 0028 0003 6000 3f 06 0000 01010101 02010101
+0401 0019 00000000 00000000 50 10 2000 0000 0000
+
+# 1.1.1.1,1025 -> 2.1.1.1,25 TTL=63 TCP DF FO=0
+45 00 001c 0004 6000 3f 06 0000 01010101 02010101
+0401 0019 00000000
+
+# 1.1.1.1 -> 2.1.1.1 TTL=63 TCP DF FO=1 SYN
+45 00 001c 0005 6001 3f 06 0000 01010101 02010101
+00000000 50 10 2000
+
+# 1.1.1.1 -> 2.1.1.1 TTL=63 UDP DF MF FO=0
+45 00 0014 0006 6000 3f 11 0000 01010101 02010101
+
+# 1.1.1.1,53 -> 2.1.1.1,53 TTL=63 UDP MF FO=0
+45 00 0018 0007 2000 3f 11 0000 01010101 02010101
+0035 0035
+
+# 1.1.1.1,1 -> 2.1.1.1,1 TTL=63 UDP MF FO=0
+45 00 001c 0008 2000 3f 11 0000 01010101 02010101
+0035003500040000
+
+# 1.1.1.1,53 -> 2.1.1.1,53 TTL=63 UDP FO=1
+45 00 001c 0008 0001 3f 11 0000 01010101 02010101
+0000000000000000
+
diff --git a/contrib/ipfilter/test/input/2 b/contrib/ipfilter/test/input/2
new file mode 100644
index 0000000..d168af0
--- /dev/null
+++ b/contrib/ipfilter/test/input/2
@@ -0,0 +1,6 @@
+in tcp 127.0.0.1,1 127.0.0.1,21
+in tcp 1.1.1.1,1 1.2.1.1,21
+in udp 127.0.0.1,1 127.0.0.1,21
+in udp 1.1.1.1,1 1.2.1.1,21
+in icmp 127.0.0.1 127.0.0.1
+in icmp 1.1.1.1 1.2.1.1
diff --git a/contrib/ipfilter/test/input/3 b/contrib/ipfilter/test/input/3
new file mode 100644
index 0000000..16a806f
--- /dev/null
+++ b/contrib/ipfilter/test/input/3
@@ -0,0 +1,5 @@
+in 127.0.0.1 127.0.0.1
+in 1.1.1.1 1.2.1.1
+in 1.1.1.2 1.2.1.1
+in 1.1.2.2 1.2.1.1
+in 1.2.2.2 1.2.1.1
diff --git a/contrib/ipfilter/test/input/4 b/contrib/ipfilter/test/input/4
new file mode 100644
index 0000000..2956d1b
--- /dev/null
+++ b/contrib/ipfilter/test/input/4
@@ -0,0 +1,5 @@
+in 127.0.0.1 127.0.0.1
+in 1.1.1.1 1.1.1.1
+in 1.1.1.1 1.1.1.2
+in 1.1.1.1 1.1.2.2
+in 1.1.1.1 1.2.2.2
diff --git a/contrib/ipfilter/test/input/5 b/contrib/ipfilter/test/input/5
new file mode 100644
index 0000000..41600c1
--- /dev/null
+++ b/contrib/ipfilter/test/input/5
@@ -0,0 +1,28 @@
+in tcp 1.1.1.1,0 2.2.2.2,2222
+in tcp 1.1.1.1,1 2.2.2.2,2222
+in tcp 1.1.1.1,23 2.2.2.2,2222
+in tcp 1.1.1.1,21 2.2.2.2,2222
+in tcp 1.1.1.1,1023 2.2.2.2,2222
+in tcp 1.1.1.1,1024 2.2.2.2,2222
+in tcp 1.1.1.1,1025 2.2.2.2,2222
+in tcp 1.1.1.1,32767 2.2.2.2,2222
+in tcp 1.1.1.1,32768 2.2.2.2,2222
+in tcp 1.1.1.1,65535 2.2.2.2,2222
+in tcp 1.1.1.1,5999 2.2.2.2,2222
+in tcp 1.1.1.1,6000 2.2.2.2,2222
+in tcp 1.1.1.1,6009 2.2.2.2,2222
+in tcp 1.1.1.1,6010 2.2.2.2,2222
+in udp 1.1.1.1,0 2.2.2.2,2222
+in udp 1.1.1.1,1 2.2.2.2,2222
+in udp 1.1.1.1,23 2.2.2.2,2222
+in udp 1.1.1.1,21 2.2.2.2,2222
+in udp 1.1.1.1,1023 2.2.2.2,2222
+in udp 1.1.1.1,1024 2.2.2.2,2222
+in udp 1.1.1.1,1025 2.2.2.2,2222
+in udp 1.1.1.1,32767 2.2.2.2,2222
+in udp 1.1.1.1,32768 2.2.2.2,2222
+in udp 1.1.1.1,65535 2.2.2.2,2222
+in udp 1.1.1.1,5999 2.2.2.2,2222
+in udp 1.1.1.1,6000 2.2.2.2,2222
+in udp 1.1.1.1,6009 2.2.2.2,2222
+in udp 1.1.1.1,6010 2.2.2.2,2222
diff --git a/contrib/ipfilter/test/input/6 b/contrib/ipfilter/test/input/6
new file mode 100644
index 0000000..21f0be3
--- /dev/null
+++ b/contrib/ipfilter/test/input/6
@@ -0,0 +1,28 @@
+in tcp 2.2.2.2,2222 1.1.1.1,0
+in tcp 2.2.2.2,2222 1.1.1.1,1
+in tcp 2.2.2.2,2222 1.1.1.1,23
+in tcp 2.2.2.2,2222 1.1.1.1,21
+in tcp 2.2.2.2,2222 1.1.1.1,1023
+in tcp 2.2.2.2,2222 1.1.1.1,1024
+in tcp 2.2.2.2,2222 1.1.1.1,1025
+in tcp 2.2.2.2,2222 1.1.1.1,32767
+in tcp 2.2.2.2,2222 1.1.1.1,32768
+in tcp 2.2.2.2,2222 1.1.1.1,65535
+in tcp 2.2.2.2,2222 1.1.1.1,5999
+in tcp 2.2.2.2,2222 1.1.1.1,6000
+in tcp 2.2.2.2,2222 1.1.1.1,6009
+in tcp 2.2.2.2,2222 1.1.1.1,6010
+in udp 2.2.2.2,2222 1.1.1.1,0
+in udp 2.2.2.2,2222 1.1.1.1,1
+in udp 2.2.2.2,2222 1.1.1.1,23
+in udp 2.2.2.2,2222 1.1.1.1,21
+in udp 2.2.2.2,2222 1.1.1.1,1023
+in udp 2.2.2.2,2222 1.1.1.1,1024
+in udp 2.2.2.2,2222 1.1.1.1,1025
+in udp 2.2.2.2,2222 1.1.1.1,32767
+in udp 2.2.2.2,2222 1.1.1.1,32768
+in udp 2.2.2.2,2222 1.1.1.1,65535
+in udp 2.2.2.2,2222 1.1.1.1,5999
+in udp 2.2.2.2,2222 1.1.1.1,6000
+in udp 2.2.2.2,2222 1.1.1.1,6009
+in udp 2.2.2.2,2222 1.1.1.1,6010
diff --git a/contrib/ipfilter/test/input/7 b/contrib/ipfilter/test/input/7
new file mode 100644
index 0000000..2721af2
--- /dev/null
+++ b/contrib/ipfilter/test/input/7
@@ -0,0 +1,9 @@
+in icmp 1.1.1.1 2.1.1.1 echo
+in icmp 1.1.1.1 2.1.1.1 echo,1
+in icmp 1.1.1.1 2.1.1.1 echo,3
+in icmp 1.1.1.1 2.1.1.1 unreach
+in icmp 1.1.1.1 2.1.1.1 unreach,1
+in icmp 1.1.1.1 2.1.1.1 unreach,3
+in icmp 1.1.1.1 2.1.1.1 echorep
+in icmp 1.1.1.1 2.1.1.1 echorep,1
+in icmp 1.1.1.1 2.1.1.1 echorep,3
diff --git a/contrib/ipfilter/test/input/8 b/contrib/ipfilter/test/input/8
new file mode 100644
index 0000000..cace511
--- /dev/null
+++ b/contrib/ipfilter/test/input/8
@@ -0,0 +1,6 @@
+in tcp 1.1.1.1,1 2.1.2.2,1 S
+in tcp 1.1.1.1,1 2.1.2.2,1 SA
+in tcp 1.1.1.1,1 2.1.2.2,1 SF
+in tcp 1.1.1.1,1 2.1.2.2,1 SFPAUR
+in tcp 1.1.1.1,1 2.1.2.2,1 PAU
+in tcp 1.1.1.1,1 2.1.2.2,1 A
diff --git a/contrib/ipfilter/test/input/9 b/contrib/ipfilter/test/input/9
new file mode 100644
index 0000000..33f3be3
--- /dev/null
+++ b/contrib/ipfilter/test/input/9
@@ -0,0 +1,6 @@
+in 1.1.1.1 2.1.1.1 opt lsrr
+in 1.1.1.1 2.1.1.1 opt lsrr,ssrr
+in 1.1.1.1 2.1.1.1 opt ts
+in 1.1.1.1 2.1.1.1 opt sec-class=topsecret
+in 1.1.1.1 2.1.1.1 opt ssrr,sec-class=topsecret
+in 1.1.1.1 2.1.1.1 opt sec
diff --git a/contrib/ipfilter/test/itest b/contrib/ipfilter/test/itest
new file mode 100644
index 0000000..c1b5f57
--- /dev/null
+++ b/contrib/ipfilter/test/itest
@@ -0,0 +1,21 @@
+#!/bin/sh
+if [ -f /usr/ucb/touch ] ; then
+	TOUCH=/usr/ucb/touch
+else
+	if [ -f /usr/bin/touch ] ; then
+		TOUCH=/usr/bin/touch
+	else
+		if [ -f /bin/touch ] ; then
+			TOUCH=/bin/touch
+		fi
+	fi
+fi
+echo "$1...";
+/bin/cp /dev/null results/$1
+../ipf -nvf regress/$1 2>/dev/null > results/$1
+cmp expected/$1 results/$1
+status=$?
+if [ $status = 0 ] ; then
+	$TOUCH $1
+fi
+exit $status
diff --git a/contrib/ipfilter/test/regress/1 b/contrib/ipfilter/test/regress/1
new file mode 100644
index 0000000..6a2ede9
--- /dev/null
+++ b/contrib/ipfilter/test/regress/1
@@ -0,0 +1,4 @@
+block in all
+pass in all
+block out all
+pass out all
diff --git a/contrib/ipfilter/test/regress/10 b/contrib/ipfilter/test/regress/10
new file mode 100644
index 0000000..444737a
--- /dev/null
+++ b/contrib/ipfilter/test/regress/10
@@ -0,0 +1,18 @@
+block in from any to any and not ipopts
+pass in from any to any and not opt sec-class topsecret
+block in from any to any and not opt ssrr,sec-class topsecret
+pass in from any to any and not opt ssrr,sec-class topsecret
+block in from any to any and not opt ts,sec-class topsecret
+pass in from any to any and not opt ts,sec-class topsecret
+block in from any to any and not opt sec-class secret
+pass in from any to any and not opt sec-class secret
+block in from any to any and not opt lsrr,ssrr
+pass in from any to any and not opt lsrr,ssrr
+pass in from any to any and not ipopts
+block in from any to any and not opt lsrr
+pass in from any to any and not opt lsrr
+block in from any to any and not opt ssrr,ts
+pass in from any to any and not opt ssrr,ts
+block in from any to any and not opt rr
+pass in from any to any and not opt rr
+block in from any to any and not opt sec-class topsecret
diff --git a/contrib/ipfilter/test/regress/11 b/contrib/ipfilter/test/regress/11
new file mode 100644
index 0000000..0bf0a2a
--- /dev/null
+++ b/contrib/ipfilter/test/regress/11
@@ -0,0 +1,6 @@
+pass in proto tcp from any to any port = 23 flags S/SA keep state
+block in proto tcp from any to any port = 23 flags S/SA keep state
+pass in proto udp from any to any port = 53 keep frags
+block in proto udp from any to any port = 53 keep frags
+pass in proto udp from any to any port = 53 keep state
+block in proto udp from any to any port = 53 keep state
diff --git a/contrib/ipfilter/test/regress/12 b/contrib/ipfilter/test/regress/12
new file mode 100644
index 0000000..c29f839
--- /dev/null
+++ b/contrib/ipfilter/test/regress/12
@@ -0,0 +1,6 @@
+pass in proto tcp from any port > 1024 to any port = 25 with not short
+pass in proto tcp from any port > 1024 to any port = 25
+block in proto tcp from any to any with short
+block in proto tcp from any to any with frag
+pass in proto udp from any port = 53 to any port = 53
+block in proto udp from any port = 53 to any port = 53 with not short
diff --git a/contrib/ipfilter/test/regress/13 b/contrib/ipfilter/test/regress/13
new file mode 100644
index 0000000..f123e47
--- /dev/null
+++ b/contrib/ipfilter/test/regress/13
@@ -0,0 +1,6 @@
+pass in proto tcp from any to any port = 25 flags S/SA keep frags
+block in proto tcp from any to any port = 25 flags S/SA keep frags
+pass in proto udp from any to any port = 53 keep frags
+block in proto udp from any to any port = 53 keep frags
+pass in proto tcp from any to any port = 25 flags S/SA keep state keep frags
+block in proto tcp from any to any port = 25 flags S/SA keep state keep frags
diff --git a/contrib/ipfilter/test/regress/2 b/contrib/ipfilter/test/regress/2
new file mode 100644
index 0000000..e2f02a4
--- /dev/null
+++ b/contrib/ipfilter/test/regress/2
@@ -0,0 +1,6 @@
+block in proto tcp from any to any
+pass in proto tcp from any to any
+block in proto udp from any to any
+pass in proto udp from any to any
+block in proto icmp from any to any
+pass in proto icmp from any to any
diff --git a/contrib/ipfilter/test/regress/3 b/contrib/ipfilter/test/regress/3
new file mode 100644
index 0000000..ee80729
--- /dev/null
+++ b/contrib/ipfilter/test/regress/3
@@ -0,0 +1,8 @@
+block in from 1.1.1.1 to any
+pass in from 1.1.1.1 to any
+block in from 1.1.1.1/24 to any
+pass in from 1.1.1.1/24 to any
+block in from 1.1.1.1/16 to any
+pass in from 1.1.1.1/16 to any
+block in from 1.1.1.1/0 to any
+pass in from 1.1.1.1/0 to any
diff --git a/contrib/ipfilter/test/regress/4 b/contrib/ipfilter/test/regress/4
new file mode 100644
index 0000000..bc8af2f
--- /dev/null
+++ b/contrib/ipfilter/test/regress/4
@@ -0,0 +1,8 @@
+block in from any to 1.1.1.1
+pass in from any to 1.1.1.1
+block in from any to 1.1.1.1/24
+pass in from any to 1.1.1.1/24
+block in from any to 1.1.1.1/16
+pass in from any to 1.1.1.1/16
+block in from any to 1.1.1.1/0
+pass in from any to 1.1.1.1/0
diff --git a/contrib/ipfilter/test/regress/5 b/contrib/ipfilter/test/regress/5
new file mode 100644
index 0000000..998eabd
--- /dev/null
+++ b/contrib/ipfilter/test/regress/5
@@ -0,0 +1,48 @@
+block in proto tcp from any port = 23 to any
+block in proto udp from any port = 23 to any
+block in proto tcp/udp from any port = 23 to any
+pass in proto tcp from any port <= 1023 to any
+pass in proto udp from any port <= 1023 to any
+pass in proto tcp/udp from any port <= 1023 to any
+block in proto tcp from any port >= 1024 to any
+block in proto udp from any port >= 1024 to any
+block in proto tcp/udp from any port >= 1024 to any
+pass in proto tcp from any port >= 1024 to any
+pass in proto udp from any port >= 1024 to any
+pass in proto tcp/udp from any port >= 1024 to any
+block in proto tcp from any port 0 >< 512 to any
+block in proto udp from any port 0 >< 512 to any
+block in proto tcp/udp from any port 0 >< 512 to any
+pass in proto tcp from any port 0 >< 512 to any
+pass in proto udp from any port 0 >< 512 to any
+pass in proto tcp/udp from any port 0 >< 512 to any
+block in proto tcp from any port 6000 <> 6009 to any
+block in proto udp from any port 6000 <> 6009 to any
+block in proto tcp/udp from any port 6000 <> 6009 to any
+pass in proto tcp from any port 6000 <> 6009 to any
+pass in proto udp from any port 6000 <> 6009 to any
+pass in proto tcp/udp from any port 6000 <> 6009 to any
+pass in proto tcp from any port = 23 to any
+pass in proto udp from any port = 23 to any
+pass in proto tcp/udp from any port = 23 to any
+block in proto tcp from any port != 21 to any
+block in proto udp from any port != 21 to any
+block in proto tcp/udp from any port != 21 to any
+pass in proto tcp from any port != 21 to any
+pass in proto udp from any port != 21 to any
+pass in proto tcp/udp from any port != 21 to any
+block in proto tcp from any port < 1024 to any
+block in proto udp from any port < 1024 to any
+block in proto tcp/udp from any port < 1024 to any
+pass in proto tcp from any port < 1024 to any
+pass in proto udp from any port < 1024 to any
+pass in proto tcp/udp from any port < 1024 to any
+block in proto tcp from any port > 1023 to any
+block in proto udp from any port > 1023 to any
+block in proto tcp/udp from any port > 1023 to any
+pass in proto tcp from any port > 1023 to any
+pass in proto udp from any port > 1023 to any
+pass in proto tcp/udp from any port > 1023 to any
+block in proto tcp from any port <= 1023 to any
+block in proto udp from any port <= 1023 to any
+block in proto tcp/udp from any port <= 1023 to any
diff --git a/contrib/ipfilter/test/regress/6 b/contrib/ipfilter/test/regress/6
new file mode 100644
index 0000000..291f09ad
--- /dev/null
+++ b/contrib/ipfilter/test/regress/6
@@ -0,0 +1,48 @@
+block in proto tcp from any to any port = 23
+block in proto udp from any to any port = 23
+block in proto tcp/udp from any to any port = 23
+pass in proto tcp from any to any port <= 1023
+pass in proto udp from any to any port <= 1023
+pass in proto tcp/udp from any to any port <= 1023
+block in proto tcp from any to any port >= 1024
+block in proto udp from any to any port >= 1024
+block in proto tcp/udp from any to any port >= 1024
+pass in proto tcp from any to any port >= 1024
+pass in proto udp from any to any port >= 1024
+pass in proto tcp/udp from any to any port >= 1024
+block in proto tcp from any to any port 0 >< 512
+block in proto udp from any to any port 0 >< 512
+block in proto tcp/udp from any to any port 0 >< 512
+pass in proto tcp from any to any port 0 >< 512
+pass in proto udp from any to any port 0 >< 512
+pass in proto tcp/udp from any to any port 0 >< 512
+block in proto tcp from any to any port 6000 <> 6009
+block in proto udp from any to any port 6000 <> 6009
+block in proto tcp/udp from any to any port 6000 <> 6009
+pass in proto tcp from any to any port 6000 <> 6009
+pass in proto udp from any to any port 6000 <> 6009
+pass in proto tcp/udp from any to any port 6000 <> 6009
+pass in proto tcp from any to any port = 23
+pass in proto udp from any to any port = 23
+pass in proto tcp/udp from any to any port = 23
+block in proto tcp from any to any port != 21
+block in proto udp from any to any port != 21
+block in proto tcp/udp from any to any port != 21
+pass in proto tcp from any to any port != 21
+pass in proto udp from any to any port != 21
+pass in proto tcp/udp from any to any port != 21
+block in proto tcp from any to any port < 1024
+block in proto udp from any to any port < 1024
+block in proto tcp/udp from any to any port < 1024
+pass in proto tcp from any to any port < 1024
+pass in proto udp from any to any port < 1024
+pass in proto tcp/udp from any to any port < 1024
+block in proto tcp from any to any port > 1023
+block in proto udp from any to any port > 1023
+block in proto tcp/udp from any to any port > 1023
+pass in proto tcp from any to any port > 1023
+pass in proto udp from any to any port > 1023
+pass in proto tcp/udp from any to any port > 1023
+block in proto tcp from any to any port <= 1023
+block in proto udp from any to any port <= 1023
+block in proto tcp/udp from any to any port <= 1023
diff --git a/contrib/ipfilter/test/regress/7 b/contrib/ipfilter/test/regress/7
new file mode 100644
index 0000000..6848a68
--- /dev/null
+++ b/contrib/ipfilter/test/regress/7
@@ -0,0 +1,6 @@
+block in proto icmp from any to any icmp-type echo
+pass in proto icmp from any to any icmp-type echo
+block in proto icmp from any to any icmp-type unreach code 3
+pass in proto icmp from any to any icmp-type unreach code 3
+block in proto icmp from any to any icmp-type echorep
+pass in proto icmp from any to any icmp-type echorep
diff --git a/contrib/ipfilter/test/regress/8 b/contrib/ipfilter/test/regress/8
new file mode 100644
index 0000000..0f28fd2
--- /dev/null
+++ b/contrib/ipfilter/test/regress/8
@@ -0,0 +1,6 @@
+block in proto tcp from any to any flags S
+pass in proto tcp from any to any flags S
+block in proto tcp from any to any flags S/SA
+pass in proto tcp from any to any flags S/SA
+block in proto tcp from any to any flags S/APU
+pass in proto tcp from any to any flags S/APU
diff --git a/contrib/ipfilter/test/regress/9 b/contrib/ipfilter/test/regress/9
new file mode 100644
index 0000000..17bc967
--- /dev/null
+++ b/contrib/ipfilter/test/regress/9
@@ -0,0 +1,18 @@
+block in from any to any with ipopts
+pass in from any to any with opt sec-class topsecret
+block in from any to any with opt ssrr,sec-class topsecret
+pass in from any to any with opt ssrr,sec-class topsecret
+block in from any to any with opt ts,sec-class topsecret
+pass in from any to any with opt ts,sec-class topsecret
+block in from any to any with opt sec-class secret
+pass in from any to any with opt sec-class secret
+block in from any to any with opt lsrr,ssrr
+pass in from any to any with opt lsrr,ssrr
+pass in from any to any with ipopts
+block in from any to any with opt lsrr
+pass in from any to any with opt lsrr
+block in from any to any with opt ssrr,ts
+pass in from any to any with opt ssrr,ts
+block in from any to any with opt rr
+pass in from any to any with opt rr
+block in from any to any with opt sec-class topsecret
diff --git a/contrib/ipfilter/test/regress/i1 b/contrib/ipfilter/test/regress/i1
new file mode 100644
index 0000000..583cd8b
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i1
@@ -0,0 +1,11 @@
+pass in all
+block out all
+log in all
+log body in all
+count in from any to any
+pass in on ed0 from localhost to localhost
+block in log first on lo0 from any to any
+pass in log body quick from any to any
+block return-rst in quick on le0 proto tcp from any to any
+block return-icmp in on qe0 from any to any
+block return-icmp(1) in on qe0 from any to any
diff --git a/contrib/ipfilter/test/regress/i10 b/contrib/ipfilter/test/regress/i10
new file mode 100644
index 0000000..ece2712
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i10
@@ -0,0 +1,4 @@
+pass in from localhost to localhost with opt sec
+block in from any to any with not opt sec-class topsecret
+block in from any to any with not opt sec-class topsecret,secret
+pass in from any to any with opt sec-class topsecret,confid not opt sec-class unclass
diff --git a/contrib/ipfilter/test/regress/i11 b/contrib/ipfilter/test/regress/i11
new file mode 100644
index 0000000..c257f51
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i11
@@ -0,0 +1,4 @@
+pass in on ed0 proto tcp from localhost to localhost port = telnet keep state
+block in log first on lo0 proto tcp/udp from any to any keep state
+pass in proto udp from localhost to localhost port = 2049 keep frags
+pass in proto udp from localhost to localhost port = 53 keep state keep frags
diff --git a/contrib/ipfilter/test/regress/i2 b/contrib/ipfilter/test/regress/i2
new file mode 100644
index 0000000..101deaa
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i2
@@ -0,0 +1,6 @@
+log in proto tcp all
+pass in proto 6 from any to any
+pass in proto udp from localhost to localhost
+block in proto 17 from any to any
+block in proto 250 from any to any
+pass in proto tcp/udp from any to any
diff --git a/contrib/ipfilter/test/regress/i3 b/contrib/ipfilter/test/regress/i3
new file mode 100644
index 0000000..e69663e
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i3
@@ -0,0 +1,8 @@
+log in all
+pass in from 128.0.0.1/24 to 128.0.0.1/16
+pass in from 128.0.0.1/0xffffff00 to 128.0.0.1/0xffff0000
+pass in from 128.0.0.1/255.255.255.0 to 128.0.0.1/255.255.0.0
+pass in from 128.0.0.1 mask 0xffffff00 to 128.0.0.1 mask 0xffff0000
+pass in from 128.0.0.1 mask 255.255.255.0 to 128.0.0.1 mask 255.255.0.0
+pass in from localhost to localhost
+block in log from 0/0 to 0/0
diff --git a/contrib/ipfilter/test/regress/i4 b/contrib/ipfilter/test/regress/i4
new file mode 100644
index 0000000..1095ed9
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i4
@@ -0,0 +1,7 @@
+log in proto tcp from any port > 0 to any
+log in proto tcp from any to any port > 0
+pass in proto 6 from any port != 0 to any port 0 >< 65535
+pass in proto 17 from localhost port > 32000 to localhost port < 29000
+block in proto udp from any port != ntp to any port < ntp
+block in proto tcp from any port = smtp to any port > 25
+pass in proto tcp/udp from any port 1 >< 3 to any port 1 <> 3
diff --git a/contrib/ipfilter/test/regress/i5 b/contrib/ipfilter/test/regress/i5
new file mode 100644
index 0000000..38482f3
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i5
@@ -0,0 +1,5 @@
+log in all
+count in tos 0x80 from any to any
+pass in on ed0 tos 64 from localhost to localhost
+block in log on lo0 ttl 0 from any to any
+pass in quick ttl 1 from any to any
diff --git a/contrib/ipfilter/test/regress/i6 b/contrib/ipfilter/test/regress/i6
new file mode 100644
index 0000000..a35633b
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i6
@@ -0,0 +1,4 @@
+pass in on lo0 fastroute from any to any
+pass in on lo0 dup-to qe0 from localhost to localhost
+pass in on qe0 dup-to qe0:127.0.0.1 from localhost to localhost
+block in quick on qe0 to qe1 from any to any
diff --git a/contrib/ipfilter/test/regress/i7 b/contrib/ipfilter/test/regress/i7
new file mode 100644
index 0000000..9cb3572
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i7
@@ -0,0 +1,3 @@
+pass in on ed0 proto tcp from localhost to localhost port = 23 flags S/SA
+block in on lo0 proto tcp from any to any flags A
+pass in on lo0 proto tcp from any to any flags /SAP
diff --git a/contrib/ipfilter/test/regress/i8 b/contrib/ipfilter/test/regress/i8
new file mode 100644
index 0000000..bde6ed5
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i8
@@ -0,0 +1,2 @@
+pass in proto icmp from localhost to localhost icmp-type timest
+block in proto icmp from any to any icmp-type unreach code 1
diff --git a/contrib/ipfilter/test/regress/i9 b/contrib/ipfilter/test/regress/i9
new file mode 100644
index 0000000..327cff4
--- /dev/null
+++ b/contrib/ipfilter/test/regress/i9
@@ -0,0 +1,5 @@
+pass in from localhost to localhost with short
+block in from any to any with ipopts
+pass in from any to any with opt nop,rr,zsu
+pass in from any to any with opt nop,rr,zsu not opt ssrr,lsrr
+pass in from localhost to localhost with not frag
diff --git a/contrib/ipfilter/todo b/contrib/ipfilter/todo
new file mode 100644
index 0000000..f1664c0
--- /dev/null
+++ b/contrib/ipfilter/todo
@@ -0,0 +1,19 @@
+* automatically use the interface's IP# for NAT rather than any specific IP#
+
+* use fr_tcpstate() with NAT code for increased NAT usage security or even
+  fr_checkstate()
+
+* use minor devices for controlling access to alternate parts of IP Filter
+  such as filtering, accounting, state, NAT, etc.
+
+* see if the Solaris2 and dynamic plumb/unplumb problem is solvable
+
+time permitting:
+
+* load balancing across interfaces
+
+* record buffering for TCP/UDP
+
+* modular application proxying
+
+* invesitgate making logging better