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 #include <sys/cdefs.h> 23 #ifndef lint 24 #if 0 25 static const char rcsid[] _U_ = 26 "@(#) Header: /tcpdump/master/tcpdump/print-pflog.c,v 1.16 2007-09-12 19:36:18 guy Exp (LBL)"; 27 #else 28 __RCSID("$NetBSD: print-pflog.c,v 1.3 2013/04/06 19:33:08 christos Exp $"); 29 #endif 30 #endif 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #ifndef HAVE_NET_PFVAR_H 37 #error "No pf headers available" 38 #endif 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <net/if.h> 42 #include <net/pfvar.h> 43 #include <net/if_pflog.h> 44 45 #include <tcpdump-stdinc.h> 46 47 #include <stdio.h> 48 #include <pcap.h> 49 50 #include "extract.h" 51 #include "interface.h" 52 #include "addrtoname.h" 53 54 static struct tok pf_reasons[] = { 55 { 0, "0(match)" }, 56 { 1, "1(bad-offset)" }, 57 { 2, "2(fragment)" }, 58 { 3, "3(short)" }, 59 { 4, "4(normalize)" }, 60 { 5, "5(memory)" }, 61 { 6, "6(bad-timestamp)" }, 62 { 7, "7(congestion)" }, 63 { 8, "8(ip-option)" }, 64 { 9, "9(proto-cksum)" }, 65 { 10, "10(state-mismatch)" }, 66 { 11, "11(state-insert)" }, 67 { 12, "12(state-limit)" }, 68 { 13, "13(src-limit)" }, 69 { 14, "14(synproxy)" }, 70 { 0, NULL } 71 }; 72 73 static struct tok pf_actions[] = { 74 { PF_PASS, "pass" }, 75 { PF_DROP, "block" }, 76 { PF_SCRUB, "scrub" }, 77 { PF_NAT, "nat" }, 78 { PF_NONAT, "nat" }, 79 { PF_BINAT, "binat" }, 80 { PF_NOBINAT, "binat" }, 81 { PF_RDR, "rdr" }, 82 { PF_NORDR, "rdr" }, 83 { PF_SYNPROXY_DROP, "synproxy-drop" }, 84 { 0, NULL } 85 }; 86 87 static struct tok pf_directions[] = { 88 { PF_INOUT, "in/out" }, 89 { PF_IN, "in" }, 90 { PF_OUT, "out" }, 91 { 0, NULL } 92 }; 93 94 /* For reading capture files on other systems */ 95 #define OPENBSD_AF_INET 2 96 #define OPENBSD_AF_INET6 24 97 98 static void 99 pflog_print(const struct pfloghdr *hdr) 100 { 101 u_int32_t rulenr, subrulenr; 102 103 rulenr = EXTRACT_32BITS(&hdr->rulenr); 104 subrulenr = EXTRACT_32BITS(&hdr->subrulenr); 105 if (subrulenr == (u_int32_t)-1) 106 printf("rule %u/", rulenr); 107 else 108 printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); 109 110 printf("%s: %s %s on %s: ", 111 tok2str(pf_reasons, "unkn(%u)", hdr->reason), 112 tok2str(pf_actions, "unkn(%u)", hdr->action), 113 tok2str(pf_directions, "unkn(%u)", hdr->dir), 114 hdr->ifname); 115 } 116 117 u_int 118 pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) 119 { 120 u_int length = h->len; 121 u_int hdrlen; 122 u_int caplen = h->caplen; 123 const struct pfloghdr *hdr; 124 u_int8_t af; 125 126 /* check length */ 127 if (caplen < sizeof(u_int8_t)) { 128 printf("[|pflog]"); 129 return (caplen); 130 } 131 132 #define MIN_PFLOG_HDRLEN 45 133 hdr = (struct pfloghdr *)p; 134 if (hdr->length < MIN_PFLOG_HDRLEN) { 135 printf("[pflog: invalid header length!]"); 136 return (hdr->length); /* XXX: not really */ 137 } 138 hdrlen = BPF_WORDALIGN(hdr->length); 139 140 if (caplen < hdrlen) { 141 printf("[|pflog]"); 142 return (hdrlen); /* XXX: true? */ 143 } 144 145 /* print what we know */ 146 hdr = (struct pfloghdr *)p; 147 TCHECK(*hdr); 148 if (eflag) 149 pflog_print(hdr); 150 151 /* skip to the real packet */ 152 af = hdr->af; 153 length -= hdrlen; 154 caplen -= hdrlen; 155 p += hdrlen; 156 switch (af) { 157 158 case AF_INET: 159 #if OPENBSD_AF_INET != AF_INET 160 case OPENBSD_AF_INET: /* XXX: read pcap files */ 161 #endif 162 ip_print(gndo, p, length); 163 break; 164 165 #ifdef INET6 166 case AF_INET6: 167 #if OPENBSD_AF_INET6 != AF_INET6 168 case OPENBSD_AF_INET6: /* XXX: read pcap files */ 169 #endif 170 ip6_print(gndo, p, length); 171 break; 172 #endif 173 174 default: 175 /* address family not handled, print raw packet */ 176 if (!eflag) 177 pflog_print(hdr); 178 if (!suppress_default_print) 179 default_print(p, caplen); 180 } 181 182 return (hdrlen); 183 trunc: 184 printf("[|pflog]"); 185 return (hdrlen); 186 } 187 188 /* 189 * Local Variables: 190 * c-style: whitesmith 191 * c-basic-offset: 8 192 * End: 193 */ 194