Nuke the old antique copy of ipfilter from the tree. This is old enough

to be dangerous.  It will better serve us as a port building a KLD,
ala SKIP.

The hooks are staying although it would be better to port and use
the NetBSD pfil interface rather than have custom hooks.

1 files changed, 0 insertions, 1329 deletions

diff --git a/sys/netinet/fil.c b/sys/netinet/fil.c
deleted file mode 100644
index ee0ff90..0000000
--- a/sys/netinet/fil.c
+++ /dev/null
@@ -1,1329 +0,0 @@
-/*
- * Copyright (C) 1993-1997 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)
-static const char sccsid[] = "@(#)fil.c	1.36 6/5/96 (C) 1993-1996 Darren Reed";
-static const char rcsid[] = "@(#)$FreeBSD$";
-#endif
-
-#include "opt_ipfilter.h"
-
-#include <sys/errno.h>
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/file.h>
-#if !defined(__FreeBSD__)
-# include <sys/ioctl.h>
-#endif
-#if (defined(_KERNEL) || defined(KERNEL)) && !defined(linux)
-# include <sys/systm.h>
-#else
-# include <stdio.h>
-# include <string.h>
-# include <stdlib.h>
-#endif
-#include <sys/uio.h>
-#if !defined(__SVR4) && !defined(__svr4__)
-# ifndef linux
-#  include <sys/mbuf.h>
-# endif
-#else
-# include <sys/byteorder.h>
-# include <sys/dditypes.h>
-# include <sys/stream.h>
-#endif
-#if defined(__FreeBSD__)
-# include <sys/malloc.h>
-#endif
-#ifndef linux
-# include <sys/protosw.h>
-# include <sys/socket.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>
-#ifndef linux
-# include <netinet/ip_var.h>
-#endif
-#include <netinet/tcp.h>
-#include <netinet/udp.h>
-#include <netinet/ip_icmp.h>
-#include "netinet/ip_compat.h"
-#include <netinet/tcpip.h>
-#include "netinet/ip_fil.h"
-#include "netinet/ip_proxy.h"
-#include "netinet/ip_nat.h"
-#include "netinet/ip_frag.h"
-#include "netinet/ip_state.h"
-#include "netinet/ip_auth.h"
-#ifndef	MIN
-#define	MIN(a,b)	(((a)<(b))?(a):(b))
-#endif
-
-#ifndef	_KERNEL
-# include "ipf.h"
-# include "ipt.h"
-extern	int	opts;
-
-# 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	SEND_RESET(ip, qif, if, m)		send_reset(ip, if)
-# define	IPLLOG(a, c, d, e)		ipllog()
-#  define	FR_NEWAUTH(m, fi, ip, qif)	fr_newauth((mb_t *)m, fi, ip)
-# if SOLARIS
-#  define	ICMP_ERROR(b, ip, t, c, if, src) 	icmp_error(ip)
-# else
-#  define	ICMP_ERROR(b, ip, t, c, if, src) 	icmp_error(b, ip, if)
-# endif
-#else /* #ifndef _KERNEL */
-# 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	IPLLOG(a, c, d, e)		ipflog(a, c, d, e)
-# if SOLARIS || defined(__sgi)
-extern	kmutex_t	ipf_mutex, ipf_auth;
-# endif
-# if SOLARIS
-#  define	FR_NEWAUTH(m, fi, ip, qif)	fr_newauth((mb_t *)m, fi, \
-							   ip, qif)
-#  define	SEND_RESET(ip, qif, if)		send_reset(ip, qif)
-#  define	ICMP_ERROR(b, ip, t, c, if, src) \
-			icmp_error(ip, t, c, if, src)
-# else /* SOLARIS */
-#  define	FR_NEWAUTH(m, fi, ip, qif)	fr_newauth((mb_t *)m, fi, ip)
-#  ifdef linux
-#   define	SEND_RESET(ip, qif, if)		send_reset((tcpiphdr_t *)ip,\
-							   ifp)
-#  else
-#   define	SEND_RESET(ip, qif, if)		send_reset((tcpiphdr_t *)ip)
-#  endif
-#  ifdef __sgi
-#   define	ICMP_ERROR(b, ip, t, c, if, src) \
-			icmp_error(b, t, c, if, src, if)
-#  else
-#   if BSD < 199103
-#    ifdef linux
-#     define	ICMP_ERROR(b, ip, t, c, if, src) 	icmp_send(b,t,c,0,if)
-#    else
-#     define	ICMP_ERROR(b, ip, t, c, if, src) \
-			icmp_error(mtod(b, ip_t *), t, c, if, src)
-#    endif /* linux */
-#   else
-#    define	ICMP_ERROR(b, ip, t, c, if, src) \
-			icmp_error(b, t, c, (src).s_addr, if)
-#   endif /* BSD < 199103 */
-#  endif /* __sgi */
-# endif /* SOLARIS || __sgi */
-#endif /* _KERNEL */
-
-
-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 } };
-struct	frgroup *ipfgroups[3][2];
-int	fr_flags = IPF_LOGGING, fr_active = 0;
-#if defined(IPFILTER_DEFAULT_BLOCK)
-int	fr_pass = FR_NOMATCH|FR_BLOCK;
-#else
-int	fr_pass = (IPF_DEFAULT_PASS|FR_NOMATCH);
-#endif
-
-fr_info_t	frcache[2];
-
-static	void	fr_makefrip __P((int, ip_t *, fr_info_t *));
-static	int	fr_tcpudpchk __P((frentry_t *, fr_info_t *));
-static	int	frflushlist __P((int, int, int *, frentry_t *, frentry_t **));
-
-
-/*
- * bit values for identifying presence of individual IP options
- */
-static 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
- */
-static 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.
- */
-static	void	fr_makefrip(hlen, ip, fin)
-int hlen;
-ip_t *ip;
-fr_info_t *fin;
-{
-	struct optlist *op;
-	tcphdr_t *tcp;
-	icmphdr_t *icmp;
-	fr_ip_t *fi = &fin->fin_fi;
-	u_short optmsk = 0, secmsk = 0, auth = 0;
-	int i, mv, ol, off;
-	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;
-	fin->fin_group = -1;
-	fin->fin_id = ip->ip_id;
-#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);
-	icmp = (icmphdr_t *)tcp;
-	fin->fin_dp = (void *)tcp;
-	(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
-	(*(((u_32_t *)fi) + 1)) = (*(((u_32_t *)ip) + 3));
-	(*(((u_32_t *)fi) + 2)) = (*(((u_32_t *)ip) + 4));
-
-	fi->fi_fl = (hlen > sizeof(ip_t)) ? 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 :
-	{
-		int minicmpsz = sizeof(struct icmp);
-
-		if (!off && ip->ip_len > ICMP_MINLEN + hlen &&
-		    (icmp->icmp_type == ICMP_ECHOREPLY ||
-		     icmp->icmp_type == ICMP_UNREACH))
-			minicmpsz = ICMP_MINLEN;
-		if ((!(ip->ip_len >= hlen + minicmpsz) && !off) ||
-		    (off && off < sizeof(struct icmp)))
-			fi->fi_fl |= FI_SHORT;
-		if (fin->fin_dlen > 1)
-			fin->fin_data[0] = *(u_short *)tcp;
-		break;
-	}
-	case IPPROTO_TCP :
-		fi->fi_fl |= FI_TCPUDP;
-		if ((!IPMINLEN(ip, tcphdr) && !off) ||
-		    (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.
- */
-static 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, skip = 0;
-
-	fr = fin->fin_fr;
-	fin->fin_fr = NULL;
-	fin->fin_rule = 0;
-	fin->fin_group = 0;
-	off = ip->ip_off & 0x1fff;
-	pass |= (fi->fi_fl << 24);
-
-	 if ((fi->fi_fl & FI_TCPUDP) && (fin->fin_dlen > 3) && !off)
-		portcmp = 1;
-
-	for (rulen = 0; fr; fr = fr->fr_next, rulen++) {
-		if (skip) {
-			skip--;
-			continue;
-		}
-		/*
-		 * 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' : 
-				  (pass & FR_AUTH) ? 'a' : 'b'));
-		if (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp)
-			continue;
-		FR_VERBOSE((":i"));
-#endif
-		{
-			register u_32_t	*ld, *lm, *lip;
-			register int i;
-
-			lip = (u_32_t *)fi;
-			lm = (u_32_t *)&fr->fr_mip;
-			ld = (u_32_t *)&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]) << 21;
-			FR_IFDEBUG(i,continue,("1. %#08x & %#08x != %#08x\n",
-				   lip[1], lm[1], ld[1]));
-			i |= ((lip[2] & lm[2]) != ld[2]) << 22;
-			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]));
-			i ^= (fi->fi_fl & (FR_NOTSRCIP|FR_NOTDSTIP));
-			if (i)
-				continue;
-		}
-
-		/*
-		 * If a fragment, then only the first has what we're looking
-		 * for here...
-		 */
-		if (!portcmp && (fr->fr_dcmp || fr->fr_scmp || fr->fr_tcpf ||
-				 fr->fr_tcpfm))
-			continue;
-		if (fi->fi_fl & FI_TCPUDP) {
-			if (!fr_tcpudpchk(fr, fin))
-				continue;
-		} else if (fr->fr_icmpm || fr->fr_icmp) {
-			if ((fi->fi_p != IPPROTO_ICMP) || off ||
-			    (fin->fin_dlen < 2))
-				continue;
-			if ((fin->fin_data[0] & fr->fr_icmpm) != fr->fr_icmp) {
-				FR_DEBUG(("i. %#x & %#x != %#x\n",
-					 fin->fin_data[0], fr->fr_icmpm,
-					 fr->fr_icmp));
-				continue;
-			}
-		}
-		FR_VERBOSE(("*"));
-		/*
-		 * Just log this packet...
-		 */
-		if (!(skip = fr->fr_skip))
-			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 += (U_QUAD_T)ip->ip_len;
-		else
-			fin->fin_icode = fr->fr_icode;
-		fin->fin_rule = rulen;
-		fin->fin_group = fr->fr_group;
-		fin->fin_fr = fr;
-		if (fr->fr_grp) {
-			fin->fin_fr = fr->fr_grp;
-			pass = fr_scanlist(pass, ip, fin, m);
-			if (fin->fin_fr == NULL) {
-				fin->fin_rule = rulen;
-				fin->fin_group = fr->fr_group;
-				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
-#if defined(_KERNEL) && SOLARIS
-, qif, mp)
-qif_t *qif;
-#else
-, mp)
-#endif
-mb_t **mp;
-ip_t *ip;
-int hlen;
-void *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, apass, error = EHOSTUNREACH;
-#if !SOLARIS || !defined(_KERNEL)
-	register mb_t *m = *mp;
-#endif
-
-#ifdef	_KERNEL
-	mb_t *mc = NULL;
-# if !defined(__SVR4) && !defined(__svr4__)
-#  ifdef __sgi
-	char hbuf[(0xf << 2) + sizeof(struct icmp) + sizeof(ip_t) + 8];
-#  endif
-	int up;
-
-#ifdef M_CANFASTFWD
-	/*
-	 * XXX For now, IP Filter and fast-forwarding of cached flows
-	 * XXX are mutually exclusive.  Eventually, IP Filter should
-	 * XXX get a "can-fast-forward" filter rule.
-	 */
-	m->m_flags &= ~M_CANFASTFWD;
-#endif /* M_CANFASTFWD */
-
-	if ((ip->ip_p == IPPROTO_TCP || ip->ip_p == IPPROTO_UDP ||
-	     ip->ip_p == IPPROTO_ICMP)) {
-		int plen = 0;
-
-		switch(ip->ip_p)
-		{
-		case IPPROTO_TCP:
-			plen = sizeof(tcphdr_t);
-			break;
-		case IPPROTO_UDP:
-			plen = sizeof(udphdr_t);
-			break;
-		case IPPROTO_ICMP:
-			/* 96 - enough for complete ICMP error IP header */
-			plen = sizeof(struct icmp) + sizeof(ip_t) + 8;
-			break;
-		}
-		up = MIN(hlen + plen, ip->ip_len);
-
-		if (up > m->m_len) {
-#ifdef __sgi /* Under IRIX, avoid m_pullup as it makes ping <hostname> panic */
-			if ((up > sizeof(hbuf)) || (m_length(m) < up)) {
-				frstats[out].fr_pull[1]++;
-				return -1;
-			}
-			m_copydata(m, 0, up, hbuf);
-			frstats[out].fr_pull[0]++;
-			ip = (ip_t *)hbuf;
-#else
-# ifndef linux
-			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, ip_t *);
-			}
-# endif
-#endif
-		} else
-			up = 0;
-	} else
-		up = 0;
-# endif
-# if SOLARIS
-	mb_t *m = qif->qf_m;
-# endif
-#endif
-	fr_makefrip(hlen, ip, fin);
-	fin->fin_ifp = ifp;
-	fin->fin_out = out;
-	fin->fin_mp = mp;
-
-	MUTEX_ENTER(&ipf_mutex);
-
-	/*
-	 * Check auth now.  This, combined with the check below to see if apass
-	 * is 0 is to ensure that we don't count the packet twice, which can
-	 * otherwise occur when we reprocess it.  As it is, we only count it
-	 * after it has no auth. table matchup.  This also stops NAT from
-	 * occuring until after the packet has been auth'd.
-	 */
-	apass = fr_checkauth(ip, fin);
-
-	if (!out) {
-		changed = ip_natin(ip, hlen, fin);
-		if (!apass && (fin->fin_fr = ipacct[0][fr_active]) &&
-		    (FR_SCANLIST(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT))
-			frstats[0].fr_acct++;
-	}
-
-	if (apass || (!(pass = ipfr_knownfrag(ip, fin)) &&
-	    !(pass = fr_checkstate(ip, fin)))) {
-		/*
-		 * If a packet is found in the auth table, then skip checking
-		 * the access lists for permission but we do need to consider
-		 * the result as if it were from the ACL's.
-		 */
-		if (!apass) {
-			fc = frcache + out;
-			if (!bcmp((char *)fin, (char *)fc, FI_CSIZE)) {
-				/*
-				 * copy cached data so we can unlock the mutex
-				 * earlier.
-				 */
-				bcopy((char *)fc, (char *)fin, FI_COPYSIZE);
-				frstats[out].fr_chit++;
-				if ((fr = fin->fin_fr)) {
-					fr->fr_hits++;
-					pass = fr->fr_flags;
-				} else
-					pass = fr_pass;
-			} else {
-				pass = fr_pass;
-				if ((fin->fin_fr = ipfilter[out][fr_active]))
-					pass = FR_SCANLIST(fr_pass, ip, fin, m);
-				bcopy((char *)fin, (char *)fc, FI_COPYSIZE);
-				if (pass & FR_NOMATCH)
-					frstats[out].fr_nom++;
-			}
-			fr = fin->fin_fr;
-		} else
-			pass = apass;
-
-		/*
-		 * If we fail to add a packet to the authorization queue,
-		 * then we drop the packet later.  However, if it was added
-		 * then pretend we've dropped it already.
-		 */
-		if ((pass & FR_AUTH))
-			if (FR_NEWAUTH(m, fin, ip, qif) != 0)
-#ifdef	_KERNEL
-				m = *mp = NULL;
-#else
-				;
-#endif
-
-		if (pass & FR_PREAUTH) {
-			MUTEX_ENTER(&ipf_auth);
-			if ((fin->fin_fr = ipauth) &&
-			    (pass = FR_SCANLIST(0, ip, fin, m)))
-				fr_authstats.fas_hits++;
-			else
-				fr_authstats.fas_miss++;
-			MUTEX_EXIT(&ipf_auth);
-		}
-
-		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_CALLNOW))
-		pass = (*fr->fr_func)(pass, ip, fin);
-
-	/*
-	 * Only count/translate packets which will be passed on, out the
-	 * interface.
-	 */
-	if (out && (pass & FR_PASS)) {
-		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 */
-#ifdef	_KERNEL
-	/*
-	 * Only allow FR_DUP to work if a rule matched - it makes no sense to
-	 * set FR_DUP as a "default" as there are no instructions about where
-	 * to send the packet.
-	 */
-	if (fr && (pass & FR_DUP))
-# if	SOLARIS
-		mc = dupmsg(m);
-# else
-#  ifndef linux
-		mc = m_copy(m, 0, M_COPYALL);
-#  else
-		;
-#  endif
-# endif
-#endif
-	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 ?
-		 * WARNING: ICMP error packets AND TCP RST packets should
-		 * ONLY be sent in repsonse to incoming packets.  Sending them
-		 * in response to outbound packets can result in a panic on
-		 * some operating systems.
-		 */
-		if (!out) {
-#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 = *mp = 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, ifp) == 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
-		} else {
-			if (pass & FR_RETRST)
-				error = ECONNRESET;
-		}
-	}
-
-	/*
-	 * If we didn't drop off the bottom of the list of rules (and thus
-	 * the 'current' rule fr is not NULL), then we may have some extra
-	 * instructions about what to do with a packet.
-	 * Once we're finished return to our caller, freeing the packet if
-	 * we are dropping it (* BSD ONLY *).
-	 */
-#if defined(_KERNEL)
-# if !SOLARIS
-#  if !defined(linux)
-	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;
-		}
-		if (mc)
-			ipfr_fastroute(mc, fin, &fr->fr_dif);
-	}
-	if (!(pass & FR_PASS) && m)
-		m_freem(m);
-#   ifdef __sgi
-	else if (changed && up && m)
-		m_copyback(m, 0, up, hbuf);
-#   endif
-#  endif /* !linux */
-	return (pass & FR_PASS) ? 0 : error;
-# else /* !SOLARIS */
-	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 : error;
-# endif /* !SOLARIS */
-#else /* _KERNEL */
-	if (pass & FR_NOMATCH)
-		return 1;
-	if (pass & FR_PASS)
-		return 0;
-	if (pass & FR_AUTH)
-		return -2;
-	return -1;
-#endif /* _KERNEL */
-}
-
-
-/*
- * ipf_cksum
- * addr should be 16bit aligned and len is in bytes.
- * length is in bytes
- */
-u_short ipf_cksum(addr, len)
-register u_short *addr;
-register int len;
-{
-	register u_32_t 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);
-}
-
-
-/*
- * NB: This function assumes we've pullup'd enough for all of the IP header
- * and the TCP header.  We also assume that data blocks aren't allocated in
- * odd sizes.
- */
-u_short fr_tcpsum(m, ip, tcp, len)
-mb_t *m;
-ip_t *ip;
-tcphdr_t *tcp;
-int len;
-{
-	union {
-		u_char	c[2];
-		u_short	s;
-	} bytes;
-	u_32_t sum;
-	u_short	*sp;
-# if SOLARIS || defined(__sgi)
-	int add, hlen;
-# endif
-
-# if SOLARIS
-	/* skip any leading M_PROTOs */
-	while(m && (MTYPE(m) != M_DATA))
-		m = m->b_cont;
-	PANIC((!m),("fr_tcpsum: no M_DATA"));
-# endif
-
-	/*
-	 * Add up IP Header portion
-	 */
-	bytes.c[0] = 0;
-	bytes.c[1] = IPPROTO_TCP;
-	len -= (ip->ip_hl << 2);
-	sum = bytes.s;
-	sum += htons((u_short)len);
-	sp = (u_short *)&ip->ip_src;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	if (sp != (u_short *)tcp)
-		sp = (u_short *)tcp;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp++;
-	sum += *sp;
-	sp += 2;	/* Skip over checksum */
-	sum += *sp++;
-
-#if SOLARIS
-	/*
-	 * In case we had to copy the IP & TCP header out of mblks,
-	 * skip over the mblk bits which are the header
-	 */
-	if ((caddr_t)ip != (caddr_t)m->b_rptr) {
-		hlen = (caddr_t)sp - (caddr_t)ip;
-		while (hlen) {
-			add = MIN(hlen, m->b_wptr - m->b_rptr);
-			sp = (u_short *)((caddr_t)m->b_rptr + add);
-			hlen -= add;
-			if ((caddr_t)sp >= (caddr_t)m->b_wptr) {
-				m = m->b_cont;
-				PANIC((!m),("fr_tcpsum: not enough data"));
-				if (!hlen)
-					sp = (u_short *)m->b_rptr;
-			}
-		}
-	}
-#endif
-#ifdef	__sgi
-	/*
-	 * In case we had to copy the IP & TCP header out of mbufs,
-	 * skip over the mbuf bits which are the header
-	 */
-	if ((caddr_t)ip != mtod(m, caddr_t)) {
-		hlen = (caddr_t)sp - (caddr_t)ip;
-		while (hlen) {
-			add = MIN(hlen, m->m_len);
-			sp = (u_short *)(mtod(m, caddr_t) + add);
-			hlen -= add;
-			if (add >= m->m_len) {
-				m = m->m_next;
-				PANIC((!m),("fr_tcpsum: not enough data"));
-				if (!hlen)
-					sp = mtod(m, u_short *);
-			}
-		}
-	}
-#endif
-
-	if (!(len -= sizeof(*tcp)))
-		goto nodata;
-	while (len > 0) {
-#if SOLARIS
-		while ((caddr_t)sp >= (caddr_t)m->b_wptr) {
-			m = m->b_cont;
-			PANIC((!m),("fr_tcpsum: not enough data"));
-			sp = (u_short *)m->b_rptr;
-		}
-#else
-		while (((caddr_t)sp - mtod(m, caddr_t)) >= m->m_len)
-		{
-			m = m->m_next;
-			PANIC((!m),("fr_tcpsum: not enough data"));
-			sp = mtod(m, u_short *);
-		}
-#endif /* SOLARIS */
-		if (len < 2)
-			break;
-		if((u_32_t)sp & 1) {
-			bcopy((char *)sp++, (char *)&bytes.s, sizeof(bytes.s));
-			sum += bytes.s;
-		} else
-			sum += *sp++;
-		len -= 2;
-	}
-	if (len) {
-		bytes.c[1] = 0;
-		bytes.c[0] = *(u_char *)sp;
-		sum += bytes.s;
-	}
-nodata:
-	sum = (sum >> 16) + (sum & 0xffff);
-	sum += (sum >> 16);
-	sum = (u_short)((~sum) & 0xffff);
-	return sum;
-}
-
-
-#if defined(_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || defined(__sgi) )
-/*
- * Copyright (c) 1982, 1986, 1988, 1991, 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.
- *
- *	@(#)uipc_mbuf.c	8.2 (Berkeley) 1/4/94
- * $FreeBSD$
- */
-/*
- * Copy data from an mbuf chain starting "off" bytes from the beginning,
- * continuing for "len" bytes, into the indicated buffer.
- */
-void
-m_copydata(m, off, len, cp)
-	register mb_t *m;
-	register int off;
-	register int len;
-	caddr_t cp;
-{
-	register unsigned count;
-
-	if (off < 0 || len < 0)
-		panic("m_copydata");
-	while (off > 0) {
-		if (m == 0)
-			panic("m_copydata");
-		if (off < m->m_len)
-			break;
-		off -= m->m_len;
-		m = m->m_next;
-	}
-	while (len > 0) {
-		if (m == 0)
-			panic("m_copydata");
-		count = MIN(m->m_len - off, len);
-		bcopy(mtod(m, caddr_t) + off, cp, count);
-		len -= count;
-		cp += count;
-		off = 0;
-		m = m->m_next;
-	}
-}
-
-
-# ifndef linux
-/*
- * Copy data from a buffer back into the indicated mbuf chain,
- * starting "off" bytes from the beginning, extending the mbuf
- * chain if necessary.
- */
-void
-m_copyback(m0, off, len, cp)
-	struct	mbuf *m0;
-	register int off;
-	register int len;
-	caddr_t cp;
-{
-	register int mlen;
-	register struct mbuf *m = m0, *n;
-	int totlen = 0;
-
-	if (m0 == 0)
-		return;
-	while (off > (mlen = m->m_len)) {
-		off -= mlen;
-		totlen += mlen;
-		if (m->m_next == 0) {
-			n = m_getclr(M_DONTWAIT, m->m_type);
-			if (n == 0)
-				goto out;
-			n->m_len = min(MLEN, len + off);
-			m->m_next = n;
-		}
-		m = m->m_next;
-	}
-	while (len > 0) {
-		mlen = min (m->m_len - off, len);
-		bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen);
-		cp += mlen;
-		len -= mlen;
-		mlen += off;
-		off = 0;
-		totlen += mlen;
-		if (len == 0)
-			break;
-		if (m->m_next == 0) {
-			n = m_get(M_DONTWAIT, m->m_type);
-			if (n == 0)
-				break;
-			n->m_len = min(MLEN, len);
-			m->m_next = n;
-		}
-		m = m->m_next;
-	}
-out:
-#if 0
-	if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen))
-		m->m_pkthdr.len = totlen;
-#endif
-	return;
-}
-# endif /* linux */
-#endif /* (_KERNEL) && ( ((BSD < 199306) && !SOLARIS) || __sgi) */
-
-
-frgroup_t *fr_findgroup(num, flags, which, set, fgpp)
-u_short num;
-u_32_t flags;
-int which, set;
-frgroup_t ***fgpp;
-{
-	frgroup_t *fg, **fgp;
-
-	if (which == IPL_LOGAUTH)
-		fgp = &ipfgroups[2][set];
-	else if (flags & FR_ACCOUNT)
-		fgp = &ipfgroups[1][set];
-	else if (flags & (FR_OUTQUE|FR_INQUE))
-		fgp = &ipfgroups[0][set];
-	else
-		return NULL;
-
-	while ((fg = *fgp))
-		if (fg->fg_num == num)
-			break;
-		else
-			fgp = &fg->fg_next;
-	if (fgpp)
-		*fgpp = fgp;
-	return fg;
-}
-
-
-frgroup_t *fr_addgroup(num, fp, which, set)
-u_short num;
-frentry_t *fp;
-int which, set;
-{
-	frgroup_t *fg, **fgp;
-
-	if ((fg = fr_findgroup(num, fp->fr_flags, which, set, &fgp)))
-		return fg;
-
-	KMALLOC(fg, frgroup_t *, sizeof(*fg));
-	if (fg) {
-		fg->fg_num = num;
-		fg->fg_next = *fgp;
-		fg->fg_head = fp;
-		fg->fg_start = &fp->fr_grp;
-		*fgp = fg;
-	}
-	return fg;
-}
-
-
-void fr_delgroup(num, flags, which, set)
-u_short num;
-u_32_t flags;
-int which, set;
-{
-	frgroup_t *fg, **fgp;
- 
-	if (!(fg = fr_findgroup(num, flags, which, set, &fgp)))
-		return;
- 
-	*fgp = fg->fg_next;
-	KFREE(fg);
-}
-
-
-
-/*
- * recursively flush rules from the list, descending groups as they are
- * encountered.  if a rule is the head of a group and it has lost all its
- * group members, then also delete the group reference.
- */
-static int frflushlist(set, unit, nfreedp, list, listp)
-int set, unit, *nfreedp;
-frentry_t *list, **listp;
-{
-	register frentry_t *fp = list, *fpn;
-	register int freed = 0;
-
-	while (fp) {
-		fpn = fp->fr_next;
-		if (fp->fr_grp) {
-			fp->fr_ref -= frflushlist(set, unit, nfreedp,
-						  fp->fr_grp, &fp->fr_grp);
-		}
-
-		if (fp->fr_ref == 1) {
-			if (fp->fr_grhead)
-				fr_delgroup(fp->fr_grhead, fp->fr_flags, unit,
-					    set);
-			KFREE(fp);
-			*listp = fpn;
-			freed++;
-		}
-		fp = fpn;
-	}
-	*nfreedp += freed;
-	return freed;
-}
-
-
-void frflush(unit, result)
-int unit;
-int *result;
-{
-	int flags = *result, flushed = 0, set = fr_active;
-
-	bzero((char *)frcache, sizeof(frcache[0]) * 2);
-
-	if (flags & FR_INACTIVE)
-		set = 1 - set;
-
-	if (unit == IPL_LOGIPF) {
-		if (flags & FR_OUTQUE) {
-			(void) frflushlist(set, unit, &flushed,
-					   ipfilter[1][set],
-					   &ipfilter[1][set]);
-			(void) frflushlist(set, unit, &flushed,
-					   ipacct[1][set], &ipacct[1][set]);
-		}
-		if (flags & FR_INQUE) {
-			(void) frflushlist(set, unit, &flushed,
-					   ipfilter[0][set],
-					   &ipfilter[0][set]);
-			(void) frflushlist(set, unit, &flushed,
-					   ipacct[0][set], &ipacct[0][set]);
-		}
-	}
-
-	*result = flushed;
-}