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