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/if_var.h> 38 #include <net/pf/pfvar.h> 39 #include <net/pf/if_pflog.h> 40 41 #include <tcpdump-stdinc.h> 42 43 #include <stdio.h> 44 #include <pcap.h> 45 46 #include "interface.h" 47 #include "addrtoname.h" 48 49 static struct tok pf_reasons[] = { 50 { 0, "0(match)" }, 51 { 1, "1(bad-offset)" }, 52 { 2, "2(fragment)" }, 53 { 3, "3(short)" }, 54 { 4, "4(normalize)" }, 55 { 5, "5(memory)" }, 56 { 6, "6(bad-timestamp)" }, 57 { 7, "7(congestion)" }, 58 { 8, "8(ip-option)" }, 59 { 9, "9(proto-cksum)" }, 60 { 10, "10(state-mismatch)" }, 61 { 11, "11(state-insert)" }, 62 { 12, "12(state-limit)" }, 63 { 13, "13(src-limit)" }, 64 { 14, "14(synproxy)" }, 65 { 0, NULL } 66 }; 67 68 static struct tok pf_actions[] = { 69 { PF_PASS, "pass" }, 70 { PF_DROP, "block" }, 71 { PF_SCRUB, "scrub" }, 72 { PF_NAT, "nat" }, 73 { PF_NONAT, "nat" }, 74 { PF_BINAT, "binat" }, 75 { PF_NOBINAT, "binat" }, 76 { PF_RDR, "rdr" }, 77 { PF_NORDR, "rdr" }, 78 { PF_SYNPROXY_DROP, "synproxy-drop" }, 79 { 0, NULL } 80 }; 81 82 static struct tok pf_directions[] = { 83 { PF_INOUT, "in/out" }, 84 { PF_IN, "in" }, 85 { PF_OUT, "out" }, 86 { 0, NULL } 87 }; 88 89 /* For reading capture files on other systems */ 90 #define OPENBSD_AF_INET 2 91 #define OPENBSD_AF_INET6 24 92 93 static void 94 pflog_print(const struct pfloghdr *hdr) 95 { 96 u_int32_t rulenr, subrulenr; 97 98 rulenr = ntohl(hdr->rulenr); 99 subrulenr = ntohl(hdr->subrulenr); 100 if (subrulenr == (u_int32_t)-1) 101 printf("rule %u/", rulenr); 102 else 103 printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); 104 105 printf("%s: %s %s on %s: ", 106 tok2str(pf_reasons, "unkn(%u)", hdr->reason), 107 tok2str(pf_actions, "unkn(%u)", hdr->action), 108 tok2str(pf_directions, "unkn(%u)", hdr->dir), 109 hdr->ifname); 110 } 111 112 u_int 113 pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) 114 { 115 u_int length = h->len; 116 u_int hdrlen; 117 u_int caplen = h->caplen; 118 const struct pfloghdr *hdr; 119 u_int8_t af; 120 121 /* check length */ 122 if (caplen < sizeof(u_int8_t)) { 123 printf("[|pflog]"); 124 return (caplen); 125 } 126 127 #define MIN_PFLOG_HDRLEN 45 128 hdr = (struct pfloghdr *)p; 129 if (hdr->length < MIN_PFLOG_HDRLEN) { 130 printf("[pflog: invalid header length!]"); 131 return (hdr->length); /* XXX: not really */ 132 } 133 hdrlen = BPF_WORDALIGN(hdr->length); 134 135 if (caplen < hdrlen) { 136 printf("[|pflog]"); 137 return (hdrlen); /* XXX: true? */ 138 } 139 140 /* print what we know */ 141 hdr = (struct pfloghdr *)p; 142 TCHECK(*hdr); 143 if (eflag) 144 pflog_print(hdr); 145 146 /* skip to the real packet */ 147 af = hdr->af; 148 length -= hdrlen; 149 caplen -= hdrlen; 150 p += hdrlen; 151 switch (af) { 152 153 case AF_INET: 154 #if OPENBSD_AF_INET != AF_INET 155 case OPENBSD_AF_INET: /* XXX: read pcap files */ 156 #endif 157 ip_print(gndo, p, length); 158 break; 159 160 #ifdef INET6 161 case AF_INET6: 162 #if OPENBSD_AF_INET6 != AF_INET6 163 case OPENBSD_AF_INET6: /* XXX: read pcap files */ 164 #endif 165 ip6_print(p, length); 166 break; 167 #endif 168 169 default: 170 /* address family not handled, print raw packet */ 171 if (!eflag) 172 pflog_print(hdr); 173 if (!suppress_default_print) 174 default_print(p, caplen); 175 } 176 177 return (hdrlen); 178 trunc: 179 printf("[|pflog]"); 180 return (hdrlen); 181 } 182 183 /* 184 * Local Variables: 185 * c-style: whitesmith 186 * c-basic-offset: 8 187 * End: 188 */ 189