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authorDarren Reed <darrenr@FreeBSD.org>2001-02-04 14:15:48 +0000
committerDarren Reed <darrenr@FreeBSD.org>2001-02-04 14:15:48 +0000
commitd42c04169ee9ec41cadf0b90e80130d6d165c4ee (patch)
treef65e4c4ff29cc0fa15104696c4c70943f88b9d19 /sys/contrib/ipfilter/netinet/fil.c
parenta49e8152f56fe7d0d36361b2e232354c94bffe5e (diff)
downloadsrc-d42c04169ee9ec41cadf0b90e80130d6d165c4ee.tar.gz
src-d42c04169ee9ec41cadf0b90e80130d6d165c4ee.zip
Update IP Filter kernel sourcevendor/ipfilter-sys/v3-4-16
Notes
Notes: svn path=/vendor-sys/ipfilter/dist-old/; revision=72001 svn path=/vendor-sys/ipfilter/v3-4-16/; revision=72002; tag=vendor/ipfilter-sys/v3-4-16
Diffstat (limited to 'sys/contrib/ipfilter/netinet/fil.c')
-rw-r--r--sys/contrib/ipfilter/netinet/fil.c2125
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