| 1 | /* |
| 2 | * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that: (1) source code distributions |
| 7 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| 8 | * distributions including binary code include the above copyright notice and |
| 9 | * this paragraph in its entirety in the documentation or other materials |
| 10 | * provided with the distribution, and (3) all advertising materials mentioning |
| 11 | * features or use of this software display the following acknowledgement: |
| 12 | * ``This product includes software developed by the University of California, |
| 13 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| 14 | * the University nor the names of its contributors may be used to endorse |
| 15 | * or promote products derived from this software without specific prior |
| 16 | * written permission. |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 20 | */ |
| 21 | |
| 22 | #ifndef lint |
| 23 | static const char rcsid[] _U_ = |
| 24 | "@(#) $Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.16 2007-09-12 19:36:18 guy Exp $ (LBL)"; |
| 25 | #endif |
| 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | #include "config.h" |
| 29 | #endif |
| 30 | |
| 31 | #ifndef HAVE_NET_PFVAR_H |
| 32 | #error "No pf headers available" |
| 33 | #endif |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/socket.h> |
| 36 | #include <net/if.h> |
| 37 | #include <net/pfvar.h> |
| 38 | #include <net/if_pflog.h> |
| 39 | |
| 40 | #include <tcpdump-stdinc.h> |
| 41 | |
| 42 | #include <stdio.h> |
| 43 | #include <pcap.h> |
| 44 | |
| 45 | #include "interface.h" |
| 46 | #include "addrtoname.h" |
| 47 | |
| 48 | static struct tok pf_reasons[] = { |
| 49 | { 0, "0(match)" }, |
| 50 | { 1, "1(bad-offset)" }, |
| 51 | { 2, "2(fragment)" }, |
| 52 | { 3, "3(short)" }, |
| 53 | { 4, "4(normalize)" }, |
| 54 | { 5, "5(memory)" }, |
| 55 | { 6, "6(bad-timestamp)" }, |
| 56 | { 7, "7(congestion)" }, |
| 57 | { 8, "8(ip-option)" }, |
| 58 | { 9, "9(proto-cksum)" }, |
| 59 | { 10, "10(state-mismatch)" }, |
| 60 | { 11, "11(state-insert)" }, |
| 61 | { 12, "12(state-limit)" }, |
| 62 | { 13, "13(src-limit)" }, |
| 63 | { 14, "14(synproxy)" }, |
| 64 | { 0, NULL } |
| 65 | }; |
| 66 | |
| 67 | static struct tok pf_actions[] = { |
| 68 | { PF_PASS, "pass" }, |
| 69 | { PF_DROP, "block" }, |
| 70 | { PF_SCRUB, "scrub" }, |
| 71 | { PF_NAT, "nat" }, |
| 72 | { PF_NONAT, "nat" }, |
| 73 | { PF_BINAT, "binat" }, |
| 74 | { PF_NOBINAT, "binat" }, |
| 75 | { PF_RDR, "rdr" }, |
| 76 | { PF_NORDR, "rdr" }, |
| 77 | { PF_SYNPROXY_DROP, "synproxy-drop" }, |
| 78 | { 0, NULL } |
| 79 | }; |
| 80 | |
| 81 | static struct tok pf_directions[] = { |
| 82 | { PF_INOUT, "in/out" }, |
| 83 | { PF_IN, "in" }, |
| 84 | { PF_OUT, "out" }, |
| 85 | { 0, NULL } |
| 86 | }; |
| 87 | |
| 88 | /* For reading capture files on other systems */ |
| 89 | #define OPENBSD_AF_INET 2 |
| 90 | #define OPENBSD_AF_INET6 24 |
| 91 | |
| 92 | static void |
| 93 | pflog_print(const struct pfloghdr *hdr) |
| 94 | { |
| 95 | u_int32_t rulenr, subrulenr; |
| 96 | |
| 97 | rulenr = ntohl(hdr->rulenr); |
| 98 | subrulenr = ntohl(hdr->subrulenr); |
| 99 | if (subrulenr == (u_int32_t)-1) |
| 100 | printf("rule %u/", rulenr); |
| 101 | else |
| 102 | printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); |
| 103 | |
| 104 | printf("%s: %s %s on %s: ", |
| 105 | tok2str(pf_reasons, "unkn(%u)", hdr->reason), |
| 106 | tok2str(pf_actions, "unkn(%u)", hdr->action), |
| 107 | tok2str(pf_directions, "unkn(%u)", hdr->dir), |
| 108 | hdr->ifname); |
| 109 | } |
| 110 | |
| 111 | u_int |
| 112 | pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) |
| 113 | { |
| 114 | u_int length = h->len; |
| 115 | u_int hdrlen; |
| 116 | u_int caplen = h->caplen; |
| 117 | const struct pfloghdr *hdr; |
| 118 | u_int8_t af; |
| 119 | |
| 120 | /* check length */ |
| 121 | if (caplen < sizeof(u_int8_t)) { |
| 122 | printf("[|pflog]"); |
| 123 | return (caplen); |
| 124 | } |
| 125 | |
| 126 | #define MIN_PFLOG_HDRLEN 45 |
| 127 | hdr = (struct pfloghdr *)p; |
| 128 | if (hdr->length < MIN_PFLOG_HDRLEN) { |
| 129 | printf("[pflog: invalid header length!]"); |
| 130 | return (hdr->length); /* XXX: not really */ |
| 131 | } |
| 132 | hdrlen = BPF_WORDALIGN(hdr->length); |
| 133 | |
| 134 | if (caplen < hdrlen) { |
| 135 | printf("[|pflog]"); |
| 136 | return (hdrlen); /* XXX: true? */ |
| 137 | } |
| 138 | |
| 139 | /* print what we know */ |
| 140 | hdr = (struct pfloghdr *)p; |
| 141 | TCHECK(*hdr); |
| 142 | if (eflag) |
| 143 | pflog_print(hdr); |
| 144 | |
| 145 | /* skip to the real packet */ |
| 146 | af = hdr->af; |
| 147 | length -= hdrlen; |
| 148 | caplen -= hdrlen; |
| 149 | p += hdrlen; |
| 150 | switch (af) { |
| 151 | |
| 152 | case AF_INET: |
| 153 | #if OPENBSD_AF_INET != AF_INET |
| 154 | case OPENBSD_AF_INET: /* XXX: read pcap files */ |
| 155 | #endif |
| 156 | ip_print(gndo, p, length); |
| 157 | break; |
| 158 | |
| 159 | #ifdef INET6 |
| 160 | case AF_INET6: |
| 161 | #if OPENBSD_AF_INET6 != AF_INET6 |
| 162 | case OPENBSD_AF_INET6: /* XXX: read pcap files */ |
| 163 | #endif |
| 164 | ip6_print(p, length); |
| 165 | break; |
| 166 | #endif |
| 167 | |
| 168 | default: |
| 169 | /* address family not handled, print raw packet */ |
| 170 | if (!eflag) |
| 171 | pflog_print(hdr); |
| 172 | if (!suppress_default_print) |
| 173 | default_print(p, caplen); |
| 174 | } |
| 175 | |
| 176 | return (hdrlen); |
| 177 | trunc: |
| 178 | printf("[|pflog]"); |
| 179 | return (hdrlen); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Local Variables: |
| 184 | * c-style: whitesmith |
| 185 | * c-basic-offset: 8 |
| 186 | * End: |
| 187 | */ |