Update IP Filter kernel sourcevendor/ipfilter-sys/v3-4-16

1 files changed, 2125 insertions, 0 deletions

diff --git a/sys/contrib/ipfilter/netinet/fil.c b/sys/contrib/ipfilter/netinet/fil.c
new file mode 100644
index 000000000000..02f075b1c6c5
--- /dev/null
+++ b/sys/contrib/ipfilter/netinet/fil.c
@@ -0,0 +1,2125 @@
+/*
+ * Copyright (C) 1993-2000 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) 1993-2000 Darren Reed";
+static const char rcsid[] = "@(#)$Id: fil.c,v 2.35.2.30 2000/12/17 05:49:22 darrenr Exp $";
+#endif
+
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/file.h>
+#if defined(__NetBSD__) && (NetBSD >= 199905) && !defined(IPFILTER_LKM) && \
+    defined(_KERNEL)
+# include "opt_ipfilter_log.h"
+#endif
+#if (defined(KERNEL) || defined(_KERNEL)) && defined(__FreeBSD_version) && \
+    (__FreeBSD_version >= 220000)
+# if (__FreeBSD_version >= 400000)
+#  ifndef KLD_MODULE
+#   include "opt_inet6.h"
+#  endif
+#  if (__FreeBSD_version == 400019)
+#   define CSUM_DELAY_DATA
+#  endif
+# endif
+# include <sys/filio.h>
+# include <sys/fcntl.h>
+#else
+# 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>
+# if SOLARIS2 < 5
+#  include <sys/dditypes.h>
+# endif
+#  include <sys/stream.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
+#if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */
+# include <sys/hashing.h>
+# include <netinet/in_var.h>
+#endif
+#include <netinet/tcp.h>
+#include <netinet/udp.h>
+#include <netinet/ip_icmp.h>
+#include "netinet/ip_compat.h"
+#ifdef	USE_INET6
+# include <netinet/icmp6.h>
+# if !SOLARIS && defined(_KERNEL)
+#  include <netinet6/in6_var.h>
+# endif
+#endif
+#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"
+# if defined(__FreeBSD_version) && (__FreeBSD_version >= 300000)
+#  include <sys/malloc.h>
+#  if defined(_KERNEL) && !defined(IPFILTER_LKM)
+#   include "opt_ipfilter.h"
+#  endif
+# endif
+#ifndef	MIN
+# define	MIN(a,b)	(((a)<(b))?(a):(b))
+#endif
+#include "netinet/ipl.h"
+
+#ifndef	_KERNEL
+# include "ipf.h"
+# include "ipt.h"
+extern	int	opts;
+
+# define	FR_VERBOSE(verb_pr)			verbose verb_pr
+# define	FR_DEBUG(verb_pr)			debug verb_pr
+# define	IPLLOG(a, c, d, e)		ipllog()
+#else /* #ifndef _KERNEL */
+# 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	KRWLOCK_T	ipf_mutex, ipf_auth, ipf_nat;
+extern	kmutex_t	ipf_rw;
+# endif
+# if SOLARIS
+#  define	FR_NEWAUTH(m, fi, ip, qif)	fr_newauth((mb_t *)m, fi, \
+							   ip, qif)
+# else /* SOLARIS */
+#  define	FR_NEWAUTH(m, fi, ip, qif)	fr_newauth((mb_t *)m, fi, ip)
+# 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 } },
+#ifdef	USE_INET6
+		*ipfilter6[2][2] = { { NULL, NULL }, { NULL, NULL } },
+		*ipacct6[2][2] = { { NULL, NULL }, { NULL, NULL } },
+#endif
+		*ipacct[2][2] = { { NULL, NULL }, { NULL, NULL } };
+struct	frgroup *ipfgroups[3][2];
+int	fr_flags = IPF_LOGGING;
+int	fr_active = 0;
+int	fr_chksrc = 0;
+int	fr_minttl = 3;
+int	fr_minttllog = 1;
+#if defined(IPFILTER_DEFAULT_BLOCK)
+int	fr_pass = FR_NOMATCH|FR_BLOCK;
+#else
+int	fr_pass = (IPF_DEFAULT_PASS|FR_NOMATCH);
+#endif
+char	ipfilter_version[] = IPL_VERSION;
+
+fr_info_t	frcache[2];
+
+static	int	frflushlist __P((int, minor_t, int *, frentry_t **));
+#ifdef	_KERNEL
+static	void	frsynclist __P((frentry_t *));
+#endif
+
+
+/*
+ * 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;
+{
+	u_short optmsk = 0, secmsk = 0, auth = 0;
+	int i, mv, ol, off, p, plen, v;
+	fr_ip_t *fi = &fin->fin_fi;
+	struct optlist *op;
+	u_char *s, opt;
+	tcphdr_t *tcp;
+
+	fin->fin_rev = 0;
+	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;
+#ifdef	_KERNEL
+	fin->fin_icode = ipl_unreach;
+#endif
+	v = fin->fin_v;
+	fi->fi_v = v;
+	fin->fin_hlen = hlen;
+	if (v == 4) {
+		fin->fin_id = ip->ip_id;
+		fi->fi_tos = ip->ip_tos;
+		off = (ip->ip_off & IP_OFFMASK) << 3;
+		tcp = (tcphdr_t *)((char *)ip + hlen);
+		(*(((u_short *)fi) + 1)) = (*(((u_short *)ip) + 4));
+		fi->fi_src.i6[1] = 0;
+		fi->fi_src.i6[2] = 0;
+		fi->fi_src.i6[3] = 0;
+		fi->fi_dst.i6[1] = 0;
+		fi->fi_dst.i6[2] = 0;
+		fi->fi_dst.i6[3] = 0;
+		fi->fi_saddr = ip->ip_src.s_addr;
+		fi->fi_daddr = ip->ip_dst.s_addr;
+		p = ip->ip_p;
+		fi->fi_fl = (hlen > sizeof(ip_t)) ? FI_OPTIONS : 0;
+		if (ip->ip_off & 0x3fff)
+			fi->fi_fl |= FI_FRAG;
+		plen = ip->ip_len;
+		fin->fin_dlen = plen - hlen;
+	}
+#ifdef	USE_INET6
+	else if (v == 6) {
+		ip6_t *ip6 = (ip6_t *)ip;
+
+		off = 0;
+		p = ip6->ip6_nxt;
+		fi->fi_p = p;
+		fi->fi_ttl = ip6->ip6_hlim;
+		tcp = (tcphdr_t *)(ip6 + 1);
+		fi->fi_src.in6 = ip6->ip6_src;
+		fi->fi_dst.in6 = ip6->ip6_dst;
+		fin->fin_id = (u_short)(ip6->ip6_flow & 0xffff);
+		fi->fi_tos = 0;
+		fi->fi_fl = 0;
+		plen = ntohs(ip6->ip6_plen);
+		fin->fin_dlen = plen;
+	}
+#endif
+	else
+		return;
+
+	fin->fin_off = off;
+	fin->fin_plen = plen;
+	fin->fin_dp = (void *)tcp;
+
+	switch (p)
+	{
+#ifdef USE_INET6
+	case IPPROTO_ICMPV6 :
+	{
+		int minicmpsz = sizeof(struct icmp6_hdr);
+		struct icmp6_hdr *icmp6;
+
+		if (fin->fin_dlen > 1) {
+			fin->fin_data[0] = *(u_short *)tcp;
+
+			icmp6 = (struct icmp6_hdr *)tcp;
+
+			switch (icmp6->icmp6_type)
+			{
+			case ICMP6_ECHO_REPLY :
+			case ICMP6_ECHO_REQUEST :
+				minicmpsz = ICMP6ERR_MINPKTLEN;
+				break;
+			case ICMP6_DST_UNREACH :
+			case ICMP6_PACKET_TOO_BIG :
+			case ICMP6_TIME_EXCEEDED :
+			case ICMP6_PARAM_PROB :
+				minicmpsz = ICMP6ERR_IPICMPHLEN;
+				break;
+			default :
+				break;
+			}
+		}
+
+		if (!(plen >= hlen + minicmpsz))
+			fi->fi_fl |= FI_SHORT;
+
+		break;
+	}
+#endif
+	case IPPROTO_ICMP :
+	{
+		int minicmpsz = sizeof(struct icmp);
+		icmphdr_t *icmp;
+
+		if (!off && (fin->fin_dlen > 1)) {
+			fin->fin_data[0] = *(u_short *)tcp;
+
+			icmp = (icmphdr_t *)tcp;
+
+			if (icmp->icmp_type == ICMP_ECHOREPLY ||
+			    icmp->icmp_type == ICMP_ECHO)
+				minicmpsz = ICMP_MINLEN;
+
+			/*
+			 * type(1) + code(1) + cksum(2) + id(2) seq(2) +
+			 * 3*timestamp(3*4)
+			 */
+			else if (icmp->icmp_type == ICMP_TSTAMP ||
+				 icmp->icmp_type == ICMP_TSTAMPREPLY)
+				minicmpsz = 20;
+
+			/*
+			 * type(1) + code(1) + cksum(2) + id(2) seq(2) +
+			 * mask(4)
+			 */
+			else if (icmp->icmp_type == ICMP_MASKREQ ||
+				 icmp->icmp_type == ICMP_MASKREPLY)
+				minicmpsz = 12;
+		}
+
+		if ((!(plen >= hlen + minicmpsz) && !off) ||
+		    (off && off < sizeof(struct icmp)))
+			fi->fi_fl |= FI_SHORT;
+
+		break;
+	}
+	case IPPROTO_TCP :
+		fi->fi_fl |= FI_TCPUDP;
+#ifdef	USE_INET6
+		if (v == 6) {
+			if (plen < sizeof(struct tcphdr))
+				fi->fi_fl |= FI_SHORT;
+		} else
+#endif
+		if (v == 4) {
+			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;
+#ifdef	USE_INET6
+		if (v == 6) {
+			if (plen < sizeof(struct udphdr))
+				fi->fi_fl |= FI_SHORT;
+		} else
+#endif
+		if (v == 4) {
+			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;
+	}
+
+#ifdef	USE_INET6
+	if (v == 6) {
+		fi->fi_optmsk = 0;
+		fi->fi_secmsk = 0;
+		fi->fi_auth = 0;
+		return;
+	}
+#endif
+
+	for (s = (u_char *)(ip + 1), hlen -= (int)sizeof(*ip); hlen > 0; ) {
+		opt = *s;
+		if (opt == '\0')
+			break;
+		else if (opt == IPOPT_NOP)
+			ol = 1;
+		else {
+			if (hlen < 2)
+				break;
+			ol = (int)*(s + 1);
+			if (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(ft, fin)
+frtuc_t *ft;
+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)ft->ftu_dcmp)) {
+		po = ft->ftu_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 <= ft->ftu_dtop))
+			err = 0;
+		else if (!--i &&	   /* In range */
+			 (tup <= po || tup >= ft->ftu_dtop))
+			err = 0;
+	}
+	/*
+	 * compare source ports
+	 */
+	if (err && (i = (int)ft->ftu_scmp)) {
+		po = ft->ftu_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 <= ft->ftu_stop))
+			err = 0;
+		else if (!--i &&	   /* In range */
+			 (tup <= po || tup >= ft->ftu_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 !(ft->ftu_tcpf | ft->ftu_tcpfm);
+		/*
+		 * Match the flags ?  If not, abort this match.
+		 */
+		if (ft->ftu_tcpfm &&
+		    ft->ftu_tcpf != (fin->fin_tcpf & ft->ftu_tcpfm)) {
+			FR_DEBUG(("f. %#x & %#x != %#x\n", fin->fin_tcpf,
+				 ft->ftu_tcpfm, ft->ftu_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)
+u_32_t 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, logged = 0;
+	u_32_t passt;
+
+	fr = fin->fin_fr;
+	fin->fin_fr = NULL;
+	fin->fin_rule = 0;
+	fin->fin_group = 0;
+	if (fin->fin_v == 4)
+		off = ip->ip_off & IP_OFFMASK;
+	else
+		off = 0;
+	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 BSD >= 199306
+		if (fin->fin_out != 0) {
+			if ((fr->fr_oifa &&
+			     fr->fr_oifa != ((mb_t *)m)->m_pkthdr.rcvif) ||
+			    (fr->fr_ifa && fr->fr_ifa != fin->fin_ifp))
+				continue;
+		} else
+# endif
+			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 & *lm) != *ld);
+			FR_DEBUG(("0. %#08x & %#08x != %#08x\n",
+				   *lip, *lm, *ld));
+			if (i)
+				continue;
+			/*
+			 * We now know whether the packet version and the
+			 * rule version match, along with protocol, ttl and
+			 * tos.
+			 */
+			lip++, lm++, ld++;
+			/*
+			 * Unrolled loops (4 each, for 32 bits).
+			 */
+			i |= ((*lip & *lm) != *ld) << 19;
+			FR_DEBUG(("1a. %#08x & %#08x != %#08x\n",
+				   *lip, *lm, *ld));
+			if (fi->fi_v == 6) {
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 19;
+				FR_DEBUG(("1b. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 19;
+				FR_DEBUG(("1c. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 19;
+				FR_DEBUG(("1d. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+			} else {
+				lip += 3;
+				lm += 3;
+				ld += 3;
+			}
+			i ^= (fr->fr_flags & FR_NOTSRCIP);
+			if (i)
+				continue;
+			lip++, lm++, ld++;
+			i |= ((*lip & *lm) != *ld) << 20;
+			FR_DEBUG(("2a. %#08x & %#08x != %#08x\n",
+				   *lip, *lm, *ld));
+			if (fi->fi_v == 6) {
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 20;
+				FR_DEBUG(("2b. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 20;
+				FR_DEBUG(("2c. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+				lip++, lm++, ld++;
+				i |= ((*lip & *lm) != *ld) << 20;
+				FR_DEBUG(("2d. %#08x & %#08x != %#08x\n",
+					   *lip, *lm, *ld));
+			} else {
+				lip += 3;
+				lm += 3;
+				ld += 3;
+			}
+			i ^= (fr->fr_flags & FR_NOTDSTIP);
+			if (i)
+				continue;
+			lip++, lm++, ld++;
+			i |= ((*lip & *lm) != *ld);
+			FR_DEBUG(("3. %#08x & %#08x != %#08x\n",
+				   *lip, *lm, *ld));
+			lip++, lm++, ld++;
+			i |= ((*lip & *lm) != *ld);
+			FR_DEBUG(("4. %#08x & %#08x != %#08x\n",
+				   *lip, *lm, *ld));
+			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->fr_tuc, 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...
+		 */
+		passt = fr->fr_flags;
+#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL))
+		if (securelevel <= 0)
+#endif
+			if ((passt & FR_CALLNOW) && fr->fr_func)
+				passt = (*fr->fr_func)(passt, ip, fin);
+		fin->fin_fr = fr;
+#ifdef  IPFILTER_LOG
+		if ((passt & FR_LOGMASK) == FR_LOG) {
+			if (!IPLLOG(passt, ip, fin, m)) {
+				if (passt & FR_LOGORBLOCK)
+					passt |= FR_BLOCK|FR_QUICK;
+				ATOMIC_INCL(frstats[fin->fin_out].fr_skip);
+			}
+			ATOMIC_INCL(frstats[fin->fin_out].fr_pkl);
+			logged = 1;
+		}
+#endif /* IPFILTER_LOG */
+		if (!(skip = fr->fr_skip) && (passt & FR_LOGMASK) != FR_LOG)
+			pass = passt;
+		FR_DEBUG(("pass %#x\n", pass));
+		ATOMIC_INCL(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;
+		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_DONTCACHE)
+				logged = 1;
+		}
+		if (pass & FR_QUICK)
+			break;
+	}
+	if (logged)
+		pass |= FR_DONTCACHE;
+	return pass;
+}
+
+
+/*
+ * frcheck - filter check
+ * check using source and destination addresses/ports 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;
+	int changed, error = EHOSTUNREACH, v = ip->ip_v;
+	frentry_t *fr = NULL, *list;
+	u_32_t pass, apass;
+#if !SOLARIS || !defined(_KERNEL)
+	register mb_t *m = *mp;
+#endif
+
+#ifdef	_KERNEL
+	int p, len, drop = 0, logit = 0;
+	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 */
+#  ifdef CSUM_DELAY_DATA
+	/*
+	 * disable delayed checksums.
+	 */
+	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
+		in_delayed_cksum(m);
+		m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
+	}
+#  endif /* CSUM_DELAY_DATA */
+
+# ifdef	USE_INET6
+	if (v == 6) {
+		len = ntohs(((ip6_t*)ip)->ip6_plen);
+		p = ((ip6_t *)ip)->ip6_nxt;
+	} else
+# endif
+	{
+		p = ip->ip_p;
+		len = ip->ip_len;
+	}
+
+	if ((p == IPPROTO_TCP || p == IPPROTO_UDP || p == IPPROTO_ICMP
+# ifdef USE_INET6
+	    || (v == 6 && p == IPPROTO_ICMPV6)
+# endif
+	   )) {
+		int plen = 0;
+
+		if ((v == 6) || (ip->ip_off & IP_OFFMASK) == 0)
+			switch(p)
+			{
+			case IPPROTO_TCP:
+				plen = sizeof(tcphdr_t);
+				break;
+			case IPPROTO_UDP:
+				plen = sizeof(udphdr_t);
+				break;
+			/* 96 - enough for complete ICMP error IP header */
+			case IPPROTO_ICMP:
+				plen = ICMPERR_MAXPKTLEN - sizeof(ip_t);
+				break;
+# ifdef USE_INET6
+	    		case IPPROTO_ICMPV6 :
+				/*
+				 * XXX does not take intermediate header
+				 * into account
+				 */
+				plen = ICMP6ERR_MINPKTLEN + 8 - sizeof(ip6_t);
+				break;
+# endif
+			}
+		up = MIN(hlen + plen, 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)) {
+				ATOMIC_INCL(frstats[out].fr_pull[1]);
+				return -1;
+			}
+			m_copydata(m, 0, up, hbuf);
+			ATOMIC_INCL(frstats[out].fr_pull[0]);
+			ip = (ip_t *)hbuf;
+#  else /* __ sgi */
+#   ifndef linux
+			if ((*mp = m_pullup(m, up)) == 0) {
+				ATOMIC_INCL(frstats[out].fr_pull[1]);
+				return -1;
+			} else {
+				ATOMIC_INCL(frstats[out].fr_pull[0]);
+				m = *mp;
+				ip = mtod(m, ip_t *);
+			}
+#   endif /* !linux */
+#  endif /* __sgi */
+		} else
+			up = 0;
+	} else
+		up = 0;
+# endif /* !defined(__SVR4) && !defined(__svr4__) */
+# if SOLARIS
+	mb_t *m = qif->qf_m;
+
+	if ((u_int)ip & 0x3)
+		return 2;
+	fin->fin_qfm = m;
+	fin->fin_qif = qif;
+# endif
+#endif /* _KERNEL */
+	
+	/*
+	 * Be careful here: ip_id is in network byte order when called
+	 * from ip_output()
+	 */
+	if ((out) && (v == 4))
+		ip->ip_id = ntohs(ip->ip_id);
+
+	changed = 0;
+	fin->fin_ifp = ifp;
+	fin->fin_v = v;
+	fin->fin_out = out;
+	fin->fin_mp = mp;
+	fr_makefrip(hlen, ip, fin);
+
+#ifdef _KERNEL
+# ifdef	USE_INET6
+	if (v == 6) {
+		ATOMIC_INCL(frstats[0].fr_ipv6[out]);
+		if (((ip6_t *)ip)->ip6_hlim < fr_minttl) {
+			ATOMIC_INCL(frstats[0].fr_badttl);
+			if (fr_minttllog)
+				logit = -2;
+		}
+	} else
+# endif
+	if (!out) {
+		if (fr_chksrc && !fr_verifysrc(ip->ip_src, ifp)) {
+			ATOMIC_INCL(frstats[0].fr_badsrc);
+			if (fr_chksrc == 2)
+				logit = -2;
+		} else if (ip->ip_ttl < fr_minttl) {
+			ATOMIC_INCL(frstats[0].fr_badttl);
+			if (fr_minttllog)
+				logit = -3;
+		}
+	}
+	if (drop) {
+# ifdef	IPFILTER_LOG
+		if (logit) {
+			fin->fin_group = logit;
+			pass = FR_INQUE|FR_NOMATCH|FR_LOGB;
+			(void) IPLLOG(pass, ip, fin, m);
+		}
+# endif
+# if !SOLARIS
+		m_freem(m);
+# endif
+		return error;
+	}
+#endif
+	pass = fr_pass;
+	if (fin->fin_fi.fi_fl & FI_SHORT) {
+		ATOMIC_INCL(frstats[out].fr_short);
+	}
+
+	READ_ENTER(&ipf_mutex);
+
+	if (fin->fin_fi.fi_fl & FI_SHORT)
+		ATOMIC_INCL(frstats[out].fr_short);
+	
+	/*
+	 * 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) {
+#ifdef	USE_INET6
+		if (v == 6)
+			list = ipacct6[0][fr_active];
+		else
+#endif
+			list = ipacct[0][fr_active];
+		changed = ip_natin(ip, fin);
+		if (!apass && (fin->fin_fr = list) &&
+		    (fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) {
+			ATOMIC_INCL(frstats[0].fr_acct);
+		}
+	}
+
+	if (apass || (!(fr = ipfr_knownfrag(ip, fin)) &&
+	    !(fr = 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);
+				ATOMIC_INCL(frstats[out].fr_chit);
+				if ((fr = fin->fin_fr)) {
+					ATOMIC_INCL(fr->fr_hits);
+					pass = fr->fr_flags;
+				}
+			} else {
+#ifdef	USE_INET6
+				if (v == 6)
+					list = ipfilter6[out][fr_active];
+				else
+#endif
+					list = ipfilter[out][fr_active];
+				if ((fin->fin_fr = list))
+					pass = fr_scanlist(fr_pass, ip, fin, m);
+				if (!(pass & (FR_KEEPSTATE|FR_DONTCACHE)))
+					bcopy((char *)fin, (char *)fc,
+					      FI_COPYSIZE);
+				if (pass & FR_NOMATCH) {
+					ATOMIC_INCL(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((mb_t *)m, fin, ip) != 0)
+#ifdef	_KERNEL
+				m = *mp = NULL;
+#else
+				;
+#endif
+
+		if (pass & FR_PREAUTH) {
+			READ_ENTER(&ipf_auth);
+			if ((fin->fin_fr = ipauth) &&
+			    (pass = fr_scanlist(0, ip, fin, m))) {
+				ATOMIC_INCL(fr_authstats.fas_hits);
+			} else {
+				ATOMIC_INCL(fr_authstats.fas_miss);
+			}
+			RWLOCK_EXIT(&ipf_auth);
+		}
+
+		fin->fin_fr = fr;
+		if ((pass & (FR_KEEPFRAG|FR_KEEPSTATE)) == FR_KEEPFRAG) {
+			if (fin->fin_fi.fi_fl & FI_FRAG) {
+				if (ipfr_newfrag(ip, fin, pass) == -1) {
+					ATOMIC_INCL(frstats[out].fr_bnfr);
+				} else {
+					ATOMIC_INCL(frstats[out].fr_nfr);
+				}
+			} else {
+				ATOMIC_INCL(frstats[out].fr_cfr);
+			}
+		}
+		if (pass & FR_KEEPSTATE) {
+			if (fr_addstate(ip, fin, 0) == NULL) {
+				ATOMIC_INCL(frstats[out].fr_bads);
+			} else {
+				ATOMIC_INCL(frstats[out].fr_ads);
+			}
+		}
+	} else if (fr != NULL) {
+		pass = fr->fr_flags;
+		if (pass & FR_LOGFIRST)
+			pass &= ~(FR_LOGFIRST|FR_LOG);
+	}
+
+#if (BSD >= 199306) && (defined(_KERNEL) || defined(KERNEL))
+	if (securelevel <= 0)
+#endif
+		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)) {
+#ifdef	USE_INET6
+		if (v == 6)
+			list = ipacct6[1][fr_active];
+		else
+#endif
+			list = ipacct[1][fr_active];
+		if ((fin->fin_fr = list) &&
+		    (fr_scanlist(FR_NOMATCH, ip, fin, m) & FR_ACCOUNT)) {
+			ATOMIC_INCL(frstats[1].fr_acct);
+		}
+		fin->fin_fr = fr;
+		changed = ip_natout(ip, fin);
+	} else
+		fin->fin_fr = fr;
+	RWLOCK_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;
+			ATOMIC_INCL(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;
+			ATOMIC_INCL(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;
+			ATOMIC_INCL(frstats[out].fr_bpkl);
+logit:
+			if (!IPLLOG(pass, ip, fin, m)) {
+				ATOMIC_INCL(frstats[out].fr_skip);
+				if ((pass & (FR_PASS|FR_LOGORBLOCK)) ==
+				    (FR_PASS|FR_LOGORBLOCK))
+					pass ^= FR_PASS|FR_BLOCK;
+			}
+		}
+	}
+#endif /* IPFILTER_LOG */
+
+	if ((out) && (v == 4))
+		ip->ip_id = htons(ip->ip_id);
+
+#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) {
+		ATOMIC_INCL(frstats[out].fr_pass);
+	} else if (pass & FR_BLOCK) {
+		ATOMIC_INCL(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) {
+				int dst;
+
+				if ((pass & FR_RETMASK) == FR_FAKEICMP)
+					dst = 1;
+				else
+					dst = 0;
+				send_icmp_err(ip, ICMP_UNREACH, fin, dst);
+				ATOMIC_INCL(frstats[0].fr_ret);
+			} else if (((pass & FR_RETMASK) == FR_RETRST) &&
+				   !(fin->fin_fi.fi_fl & FI_SHORT)) {
+				if (send_reset(ip, fin) == 0) {
+					ATOMIC_INCL(frstats[1].fr_ret);
+				}
+			}
+#else
+			if ((pass & FR_RETMASK) == FR_RETICMP) {
+				verbose("- ICMP unreachable sent\n");
+				ATOMIC_INCL(frstats[0].fr_ret);
+			} else if ((pass & FR_RETMASK) == FR_FAKEICMP) {
+				verbose("- forged ICMP unreachable sent\n");
+				ATOMIC_INCL(frstats[0].fr_ret);
+			} else if (((pass & FR_RETMASK) == FR_RETRST) &&
+				   !(fin->fin_fi.fi_fl & FI_SHORT)) {
+				verbose("- TCP RST sent\n");
+				ATOMIC_INCL(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 ((changed == -1) && (pass & FR_PASS)) {
+		pass &= ~FR_PASS;
+		pass |= FR_BLOCK;
+	}
+#if defined(_KERNEL)
+# if !SOLARIS
+#  if !defined(linux)
+	if (fr) {
+		frdest_t *fdp = &fr->fr_tif;
+
+		if (((pass & FR_FASTROUTE) && !out) ||
+		    (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
+			if (ipfr_fastroute(m, fin, fdp) == 0)
+				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 */
+# else /* !SOLARIS */
+	if (fr) {
+		frdest_t *fdp = &fr->fr_tif;
+
+		if (((pass & FR_FASTROUTE) && !out) ||
+		    (fdp->fd_ifp && fdp->fd_ifp != (struct ifnet *)-1)) {
+			if (ipfr_fastroute(ip, m, mp, fin, fdp) == 0)
+				m = *mp = NULL;
+		}
+		if (mc)
+			ipfr_fastroute(ip, mc, mp, fin, &fr->fr_dif);
+	}
+# endif /* !SOLARIS */
+	return (pass & FR_PASS) ? 0 : error;
+#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)
+mb_t *m;
+ip_t *ip;
+tcphdr_t *tcp;
+{
+	u_short *sp, slen, ts;
+	u_int sum, sum2;
+	int hlen;
+
+	/*
+	 * Add up IP Header portion
+	 */
+	hlen = ip->ip_hl << 2;
+	slen = ip->ip_len - hlen;
+	sum = htons((u_short)ip->ip_p);
+	sum += htons(slen);
+	sp = (u_short *)&ip->ip_src;
+	sum += *sp++;	/* ip_src */
+	sum += *sp++;
+	sum += *sp++;	/* ip_dst */
+	sum += *sp++;
+	ts = tcp->th_sum;
+	tcp->th_sum = 0;
+#ifdef	KERNEL
+# if SOLARIS
+	sum2 = ip_cksum(m, hlen, sum);	/* hlen == offset */
+	sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+	sum2 = ~sum2 & 0xffff;
+# else /* SOLARIS */
+#  if defined(BSD) || defined(sun)
+#   if BSD >= 199306
+	m->m_data += hlen;
+#   else
+	m->m_off += hlen;
+#   endif
+	m->m_len -= hlen;
+	sum2 = in_cksum(m, slen);
+	m->m_len += hlen;
+#   if BSD >= 199306
+	m->m_data -= hlen;
+#   else
+	m->m_off -= hlen;
+#   endif
+	/*
+	 * Both sum and sum2 are partial sums, so combine them together.
+	 */
+	sum = (sum & 0xffff) + (sum >> 16);
+	sum = ~sum & 0xffff;
+	sum2 += sum;
+	sum2 = (sum2 & 0xffff) + (sum2 >> 16);
+#  else /* defined(BSD) || defined(sun) */
+{
+	union {
+		u_char	c[2];
+		u_short	s;
+	} bytes;
+	u_short len = ip->ip_len;
+# if defined(__sgi)
+	int add;
+# endif
+
+	/*
+	 * Add up IP Header portion
+	 */
+	sp = (u_short *)&ip->ip_src;
+	len -= (ip->ip_hl << 2);
+	sum = ntohs(IPPROTO_TCP);
+	sum += htons(len);
+	sum += *sp++;	/* ip_src */
+	sum += *sp++;
+	sum += *sp++;	/* ip_dst */
+	sum += *sp++;
+	if (sp != (u_short *)tcp)
+		sp = (u_short *)tcp;
+	sum += *sp++;	/* sport */
+	sum += *sp++;	/* dport */
+	sum += *sp++;	/* seq */
+	sum += *sp++;
+	sum += *sp++;	/* ack */
+	sum += *sp++;
+	sum += *sp++;	/* off */
+	sum += *sp++;	/* win */
+	sum += *sp++;	/* Skip over checksum */
+	sum += *sp++;	/* urp */
+
+# 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;
+				if (!hlen) {
+					if (!m)
+						break;
+					sp = mtod(m, u_short *);
+				}
+				PANIC((!m),("fr_tcpsum(1): not enough data"));
+			}
+		}
+	}
+# endif
+
+	if (!(len -= sizeof(*tcp)))
+		goto nodata;
+	while (len > 1) {
+		if (((caddr_t)sp - mtod(m, caddr_t)) >= m->m_len) {
+			m = m->m_next;
+			PANIC((!m),("fr_tcpsum(2): not enough data"));
+			sp = mtod(m, u_short *);
+		}
+		if (((caddr_t)(sp + 1) - mtod(m, caddr_t)) > m->m_len) {
+			bytes.c[0] = *(u_char *)sp;
+			m = m->m_next;
+			PANIC((!m),("fr_tcpsum(3): not enough data"));
+			sp = mtod(m, u_short *);
+			bytes.c[1] = *(u_char *)sp;
+			sum += bytes.s;
+			sp = (u_short *)((u_char *)sp + 1);
+		}
+		if ((u_long)sp & 1) {
+			bcopy((char *)sp++, (char *)&bytes.s, sizeof(bytes.s));
+			sum += bytes.s;
+		} else
+			sum += *sp++;
+		len -= 2;
+	}
+	if (len)
+		sum += ntohs(*(u_char *)sp << 8);
+nodata:
+	while (sum > 0xffff)
+		sum = (sum & 0xffff) + (sum >> 16);
+	sum2 = (u_short)(~sum & 0xffff);
+}
+#  endif /*  defined(BSD) || defined(sun) */
+# endif /* SOLARIS */
+#else /* KERNEL */
+	sum2 = 0;
+#endif /* KERNEL */
+	tcp->th_sum = ts;
+	return sum2;
+}
+
+
+#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
+ * $Id: fil.c,v 2.35.2.30 2000/12/17 05:49:22 darrenr Exp $
+ */
+/*
+ * 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_32_t num, flags;
+minor_t which;
+int 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;
+	num &= 0xffff;
+
+	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_32_t num;
+frentry_t *fp;
+minor_t which;
+int set;
+{
+	frgroup_t *fg, **fgp;
+
+	if ((fg = fr_findgroup(num, fp->fr_flags, which, set, &fgp)))
+		return fg;
+
+	KMALLOC(fg, frgroup_t *);
+	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_32_t num, flags;
+minor_t which;
+int 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, listp)
+int set;
+minor_t unit;
+int *nfreedp;
+frentry_t **listp;
+{
+	register int freed = 0, i;
+	register frentry_t *fp;
+
+	while ((fp = *listp)) {
+		*listp = fp->fr_next;
+		if (fp->fr_grp) {
+			i = frflushlist(set, unit, nfreedp, &fp->fr_grp);
+			MUTEX_ENTER(&ipf_rw);
+			fp->fr_ref -= i;
+			MUTEX_EXIT(&ipf_rw);
+		}
+
+		ATOMIC_DEC32(fp->fr_ref);
+		if (fp->fr_grhead) {
+			fr_delgroup(fp->fr_grhead, fp->fr_flags, 
+				    unit, set);
+			fp->fr_grhead = 0;
+		}
+		if (fp->fr_ref == 0) {
+			KFREE(fp);
+			freed++;
+		} else
+			fp->fr_next = NULL;
+	}
+	*nfreedp += freed;
+	return freed;
+}
+
+
+int frflush(unit, flags)
+minor_t unit;
+int flags;
+{
+	int flushed = 0, set;
+
+	if (unit != IPL_LOGIPF)
+		return 0;
+	WRITE_ENTER(&ipf_mutex);
+	bzero((char *)frcache, sizeof(frcache[0]) * 2);
+
+	set = fr_active;
+	if (flags & FR_INACTIVE)
+		set = 1 - set;
+
+	if (flags & FR_OUTQUE) {
+#ifdef	USE_INET6
+		(void) frflushlist(set, unit, &flushed, &ipfilter6[1][set]);
+		(void) frflushlist(set, unit, &flushed, &ipacct6[1][set]);
+#endif
+		(void) frflushlist(set, unit, &flushed, &ipfilter[1][set]);
+		(void) frflushlist(set, unit, &flushed, &ipacct[1][set]);
+	}
+	if (flags & FR_INQUE) {
+#ifdef	USE_INET6
+		(void) frflushlist(set, unit, &flushed, &ipfilter6[0][set]);
+		(void) frflushlist(set, unit, &flushed, &ipacct6[0][set]);
+#endif
+		(void) frflushlist(set, unit, &flushed, &ipfilter[0][set]);
+		(void) frflushlist(set, unit, &flushed, &ipacct[0][set]);
+	}
+	RWLOCK_EXIT(&ipf_mutex);
+	return flushed;
+}
+
+
+char *memstr(src, dst, slen, dlen)
+char *src, *dst;
+int slen, dlen;
+{
+	char *s = NULL;
+
+	while (dlen >= slen) {
+		if (bcmp(src, dst, slen) == 0) {
+			s = dst;
+			break;
+		}
+		dst++;
+		dlen--;
+	}
+	return s;
+}
+
+
+void fixskip(listp, rp, addremove)
+frentry_t **listp, *rp;
+int addremove;
+{
+	frentry_t *fp;
+	int rules = 0, rn = 0;
+
+	for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rules++)
+		;
+
+	if (!fp)
+		return;
+
+	for (fp = *listp; fp && (fp != rp); fp = fp->fr_next, rn++)
+		if (fp->fr_skip && (rn + fp->fr_skip >= rules))
+			fp->fr_skip += addremove;
+}
+
+
+#ifdef	_KERNEL
+/*
+ * 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_32_t	ip;
+{
+	u_32_t	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;
+}
+
+
+/*
+ * return the first IP Address associated with an interface
+ */
+int fr_ifpaddr(v, ifptr, inp)
+int v;
+void *ifptr;
+struct in_addr *inp;
+{
+# ifdef	USE_INET6
+	struct in6_addr *inp6 = NULL;
+# endif
+# if SOLARIS
+	ill_t *ill = ifptr;
+# else
+	struct ifnet *ifp = ifptr;
+# endif
+	struct in_addr in;
+
+# if SOLARIS
+#  ifdef	USE_INET6
+	if (v == 6) {
+		struct in6_addr in6;
+
+		/*
+		 * First is always link local.
+		 */
+		if (ill->ill_ipif->ipif_next)
+			in6 = ill->ill_ipif->ipif_next->ipif_v6lcl_addr;
+		else
+			bzero((char *)&in6, sizeof(in6));
+		bcopy((char *)&in6, (char *)inp, sizeof(in6));
+	} else
+#  endif
+	{
+		in.s_addr = ill->ill_ipif->ipif_local_addr;
+		*inp = in;
+	}
+# else /* SOLARIS */
+#  if linux
+	;
+#  else /* linux */
+	struct sockaddr_in *sin;
+	struct ifaddr *ifa;
+
+#   if	(__FreeBSD_version >= 300000)
+	ifa = TAILQ_FIRST(&ifp->if_addrhead);
+#   else
+#    if defined(__NetBSD__) || defined(__OpenBSD__)
+	ifa = ifp->if_addrlist.tqh_first;
+#    else
+#     if defined(__sgi) && defined(IFF_DRVRLOCK) /* IRIX 6 */
+	ifa = &((struct in_ifaddr *)ifp->in_ifaddr)->ia_ifa;
+#     else
+	ifa = ifp->if_addrlist;
+#     endif
+#    endif /* __NetBSD__ || __OpenBSD__ */
+#   endif /* __FreeBSD_version >= 300000 */
+#   if (BSD < 199306) && !(/*IRIX6*/defined(__sgi) && defined(IFF_DRVRLOCK))
+	sin = (struct sockaddr_in *)&ifa->ifa_addr;
+#   else
+	sin = (struct sockaddr_in *)ifa->ifa_addr;
+	while (sin && ifa) {
+		if ((v == 4) && (sin->sin_family == AF_INET))
+			break;
+#    ifdef USE_INET6
+		if ((v == 6) && (sin->sin_family == AF_INET6)) {
+			inp6 = &((struct sockaddr_in6 *)sin)->sin6_addr;
+			if (!IN6_IS_ADDR_LINKLOCAL(inp6) &&
+			    !IN6_IS_ADDR_LOOPBACK(inp6))
+				break;
+		}
+#    endif
+#    if	(__FreeBSD_version >= 300000)
+		ifa = TAILQ_NEXT(ifa, ifa_link);
+#    else
+#     if defined(__NetBSD__) || defined(__OpenBSD__)
+		ifa = ifa->ifa_list.tqe_next;
+#     else
+		ifa = ifa->ifa_next;
+#     endif
+#    endif /* __FreeBSD_version >= 300000 */
+		if (ifa)
+			sin = (struct sockaddr_in *)ifa->ifa_addr;
+	}
+	if (ifa == NULL)
+		sin = NULL;
+	if (sin == NULL)
+		return -1;
+#   endif /* (BSD < 199306) && (!__sgi && IFF_DRVLOCK) */
+#    ifdef	USE_INET6
+	if (v == 6)
+		bcopy((char *)inp6, (char *)inp, sizeof(*inp6));
+	else
+#    endif
+	{
+		in = sin->sin_addr;
+		*inp = in;
+	}
+#  endif /* linux */
+# endif /* SOLARIS */
+	return 0;
+}
+
+
+static void frsynclist(fr)
+register frentry_t *fr;
+{
+	for (; fr; fr = fr->fr_next) {
+		if (fr->fr_ifa != NULL) {
+			fr->fr_ifa = GETUNIT(fr->fr_ifname, fr->fr_ip.fi_v);
+			if (fr->fr_ifa == NULL)
+				fr->fr_ifa = (void *)-1;
+		}
+		if (fr->fr_grp)
+			frsynclist(fr->fr_grp);
+	}
+}
+
+
+void frsync()
+{
+# if !SOLARIS
+	register struct ifnet *ifp;
+
+#  if defined(__OpenBSD__) || ((NetBSD >= 199511) && (NetBSD < 1991011)) || \
+     (defined(__FreeBSD_version) && (__FreeBSD_version >= 300000))
+#   if (NetBSD >= 199905) || defined(__OpenBSD__)
+	for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next)
+#   else
+	for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next)
+#   endif
+#  else
+	for (ifp = ifnet; ifp; ifp = ifp->if_next)
+#  endif
+	{
+		ip_natsync(ifp);
+		ip_statesync(ifp);
+	}
+	ip_natsync((struct ifnet *)-1);
+# endif
+
+	WRITE_ENTER(&ipf_mutex);
+	frsynclist(ipacct[0][fr_active]);
+	frsynclist(ipacct[1][fr_active]);
+	frsynclist(ipfilter[0][fr_active]);
+	frsynclist(ipfilter[1][fr_active]);
+#ifdef	USE_INET6
+	frsynclist(ipacct6[0][fr_active]);
+	frsynclist(ipacct6[1][fr_active]);
+	frsynclist(ipfilter6[0][fr_active]);
+	frsynclist(ipfilter6[1][fr_active]);
+#endif
+	RWLOCK_EXIT(&ipf_mutex);
+}
+
+
+/*
+ * In the functions below, bcopy() is called because the pointer being
+ * copied _from_ in this instance is a pointer to a char buf (which could
+ * end up being unaligned) and on the kernel's local stack.
+ */
+int ircopyptr(a, b, c)
+void *a, *b;
+size_t c;
+{
+	caddr_t ca;
+	int err;
+
+#if SOLARIS
+	if (copyin(a, (char *)&ca, sizeof(ca)))
+		return EFAULT;
+#else
+	bcopy(a, &ca, sizeof(ca));
+#endif
+	err = copyin(ca, b, c);
+	if (err)
+		err = EFAULT;
+	return err;
+}
+
+
+int iwcopyptr(a, b, c)
+void *a, *b;
+size_t c;
+{
+	caddr_t ca;
+	int err;
+
+#if SOLARIS
+	if (copyin(b, (char *)&ca, sizeof(ca)))
+		return EFAULT;
+#else
+	bcopy(b, &ca, sizeof(ca));
+#endif
+	err = copyout(a, ca, c);
+	if (err)
+		err = EFAULT;
+	return err;
+}
+
+#else /* _KERNEL */
+
+
+/*
+ * return the first IP Address associated with an interface
+ */
+int fr_ifpaddr(v, ifptr, inp)
+int v;
+void *ifptr;
+struct in_addr *inp;
+{
+	return 0;
+}
+
+
+int ircopyptr(a, b, c)
+void *a, *b;
+size_t c;
+{
+	caddr_t ca;
+
+	bcopy(a, &ca, sizeof(ca));
+	bcopy(ca, b, c);
+	return 0;
+}
+
+
+int iwcopyptr(a, b, c)
+void *a, *b;
+size_t c;
+{
+	caddr_t ca;
+
+	bcopy(b, &ca, sizeof(ca));
+	bcopy(a, ca, c);
+	return 0;
+}
+
+
+#endif
+
+
+int fr_lock(data, lockp)
+caddr_t data;
+int *lockp;
+{
+	int arg, error;
+
+	error = IRCOPY(data, (caddr_t)&arg, sizeof(arg));
+	if (!error) {
+		error = IWCOPY((caddr_t)lockp, data, sizeof(*lockp));
+		if (!error)
+			*lockp = arg;
+	}
+	return error;
+}
+
+
+void fr_getstat(fiop)
+friostat_t *fiop;
+{
+	bcopy((char *)frstats, (char *)fiop->f_st, sizeof(filterstats_t) * 2);
+	fiop->f_locks[0] = fr_state_lock;
+	fiop->f_locks[1] = fr_nat_lock;
+	fiop->f_locks[2] = fr_frag_lock;
+	fiop->f_locks[3] = fr_auth_lock;
+	fiop->f_fin[0] = ipfilter[0][0];
+	fiop->f_fin[1] = ipfilter[0][1];
+	fiop->f_fout[0] = ipfilter[1][0];
+	fiop->f_fout[1] = ipfilter[1][1];
+	fiop->f_acctin[0] = ipacct[0][0];
+	fiop->f_acctin[1] = ipacct[0][1];
+	fiop->f_acctout[0] = ipacct[1][0];
+	fiop->f_acctout[1] = ipacct[1][1];
+#ifdef	USE_INET6
+	fiop->f_fin6[0] = ipfilter6[0][0];
+	fiop->f_fin6[1] = ipfilter6[0][1];
+	fiop->f_fout6[0] = ipfilter6[1][0];
+	fiop->f_fout6[1] = ipfilter6[1][1];
+	fiop->f_acctin6[0] = ipacct6[0][0];
+	fiop->f_acctin6[1] = ipacct6[0][1];
+	fiop->f_acctout6[0] = ipacct6[1][0];
+	fiop->f_acctout6[1] = ipacct6[1][1];
+#else
+	fiop->f_fin6[0] = NULL;
+	fiop->f_fin6[1] = NULL;
+	fiop->f_fout6[0] = NULL;
+	fiop->f_fout6[1] = NULL;
+	fiop->f_acctin6[0] = NULL;
+	fiop->f_acctin6[1] = NULL;
+	fiop->f_acctout6[0] = NULL;
+	fiop->f_acctout6[1] = NULL;
+#endif
+	fiop->f_active = fr_active;
+	fiop->f_froute[0] = ipl_frouteok[0];
+	fiop->f_froute[1] = ipl_frouteok[1];
+
+	fiop->f_running = fr_running;
+	fiop->f_groups[0][0] = ipfgroups[0][0];
+	fiop->f_groups[0][1] = ipfgroups[0][1];
+	fiop->f_groups[1][0] = ipfgroups[1][0];
+	fiop->f_groups[1][1] = ipfgroups[1][1];
+	fiop->f_groups[2][0] = ipfgroups[2][0];
+	fiop->f_groups[2][1] = ipfgroups[2][1];
+#ifdef  IPFILTER_LOG
+	fiop->f_logging = 1;
+#else
+	fiop->f_logging = 0;
+#endif
+	fiop->f_defpass = fr_pass;
+	strncpy(fiop->f_version, ipfilter_version, sizeof(fiop->f_version));
+}
+
+
+#ifdef	USE_INET6
+int icmptoicmp6types[ICMP_MAXTYPE+1] = {
+	ICMP6_ECHO_REPLY,	/* 0: ICMP_ECHOREPLY */
+	-1,			/* 1: UNUSED */
+	-1,			/* 2: UNUSED */
+	ICMP6_DST_UNREACH,	/* 3: ICMP_UNREACH */
+	-1,			/* 4: ICMP_SOURCEQUENCH */
+	ND_REDIRECT,		/* 5: ICMP_REDIRECT */
+	-1,			/* 6: UNUSED */
+	-1,			/* 7: UNUSED */
+	ICMP6_ECHO_REQUEST,	/* 8: ICMP_ECHO */
+	-1,			/* 9: UNUSED */
+	-1,			/* 10: UNUSED */
+	ICMP6_TIME_EXCEEDED,	/* 11: ICMP_TIMXCEED */
+	ICMP6_PARAM_PROB,	/* 12: ICMP_PARAMPROB */
+	-1,			/* 13: ICMP_TSTAMP */
+	-1,			/* 14: ICMP_TSTAMPREPLY */
+	-1,			/* 15: ICMP_IREQ */
+	-1,			/* 16: ICMP_IREQREPLY */
+	-1,			/* 17: ICMP_MASKREQ */
+	-1,			/* 18: ICMP_MASKREPLY */
+};
+
+
+int	icmptoicmp6unreach[ICMP_MAX_UNREACH] = {
+	ICMP6_DST_UNREACH_ADDR,		/* 0: ICMP_UNREACH_NET */
+	ICMP6_DST_UNREACH_ADDR,		/* 1: ICMP_UNREACH_HOST */
+	-1,				/* 2: ICMP_UNREACH_PROTOCOL */
+	ICMP6_DST_UNREACH_NOPORT,	/* 3: ICMP_UNREACH_PORT */
+	-1,				/* 4: ICMP_UNREACH_NEEDFRAG */
+	ICMP6_DST_UNREACH_NOTNEIGHBOR,	/* 5: ICMP_UNREACH_SRCFAIL */
+	ICMP6_DST_UNREACH_ADDR,		/* 6: ICMP_UNREACH_NET_UNKNOWN */
+	ICMP6_DST_UNREACH_ADDR,		/* 7: ICMP_UNREACH_HOST_UNKNOWN */
+	-1,				/* 8: ICMP_UNREACH_ISOLATED */
+	ICMP6_DST_UNREACH_ADMIN,	/* 9: ICMP_UNREACH_NET_PROHIB */
+	ICMP6_DST_UNREACH_ADMIN,	/* 10: ICMP_UNREACH_HOST_PROHIB */
+	-1,				/* 11: ICMP_UNREACH_TOSNET */
+	-1,				/* 12: ICMP_UNREACH_TOSHOST */
+	ICMP6_DST_UNREACH_ADMIN,	/* 13: ICMP_UNREACH_ADMIN_PROHIBIT */
+};
+#endif