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 "extract.h" 47 #include "interface.h" 48 #include "addrtoname.h" 49 50 static struct tok pf_reasons[] = { 51 { 0, "0(match)" }, 52 { 1, "1(bad-offset)" }, 53 { 2, "2(fragment)" }, 54 { 3, "3(short)" }, 55 { 4, "4(normalize)" }, 56 { 5, "5(memory)" }, 57 { 6, "6(bad-timestamp)" }, 58 { 7, "7(congestion)" }, 59 { 8, "8(ip-option)" }, 60 { 9, "9(proto-cksum)" }, 61 { 10, "10(state-mismatch)" }, 62 { 11, "11(state-insert)" }, 63 { 12, "12(state-limit)" }, 64 { 13, "13(src-limit)" }, 65 { 14, "14(synproxy)" }, 66 { 0, NULL } 67 }; 68 69 static struct tok pf_actions[] = { 70 { PF_PASS, "pass" }, 71 { PF_DROP, "block" }, 72 { PF_SCRUB, "scrub" }, 73 { PF_NAT, "nat" }, 74 { PF_NONAT, "nat" }, 75 { PF_BINAT, "binat" }, 76 { PF_NOBINAT, "binat" }, 77 { PF_RDR, "rdr" }, 78 { PF_NORDR, "rdr" }, 79 { PF_SYNPROXY_DROP, "synproxy-drop" }, 80 { 0, NULL } 81 }; 82 83 static struct tok pf_directions[] = { 84 { PF_INOUT, "in/out" }, 85 { PF_IN, "in" }, 86 { PF_OUT, "out" }, 87 { 0, NULL } 88 }; 89 90 /* For reading capture files on other systems */ 91 #define OPENBSD_AF_INET 2 92 #define OPENBSD_AF_INET6 24 93 94 static void 95 pflog_print(const struct pfloghdr *hdr) 96 { 97 u_int32_t rulenr, subrulenr; 98 99 rulenr = EXTRACT_32BITS(&hdr->rulenr); 100 subrulenr = EXTRACT_32BITS(&hdr->subrulenr); 101 if (subrulenr == (u_int32_t)-1) 102 printf("rule %u/", rulenr); 103 else 104 printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); 105 106 printf("%s: %s %s on %s: ", 107 tok2str(pf_reasons, "unkn(%u)", hdr->reason), 108 tok2str(pf_actions, "unkn(%u)", hdr->action), 109 tok2str(pf_directions, "unkn(%u)", hdr->dir), 110 hdr->ifname); 111 } 112 113 u_int 114 pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) 115 { 116 u_int length = h->len; 117 u_int hdrlen; 118 u_int caplen = h->caplen; 119 const struct pfloghdr *hdr; 120 u_int8_t af; 121 122 /* check length */ 123 if (caplen < sizeof(u_int8_t)) { 124 printf("[|pflog]"); 125 return (caplen); 126 } 127 128 #define MIN_PFLOG_HDRLEN 45 129 hdr = (struct pfloghdr *)p; 130 if (hdr->length < MIN_PFLOG_HDRLEN) { 131 printf("[pflog: invalid header length!]"); 132 return (hdr->length); /* XXX: not really */ 133 } 134 hdrlen = BPF_WORDALIGN(hdr->length); 135 136 if (caplen < hdrlen) { 137 printf("[|pflog]"); 138 return (hdrlen); /* XXX: true? */ 139 } 140 141 /* print what we know */ 142 hdr = (struct pfloghdr *)p; 143 TCHECK(*hdr); 144 if (eflag) 145 pflog_print(hdr); 146 147 /* skip to the real packet */ 148 af = hdr->af; 149 length -= hdrlen; 150 caplen -= hdrlen; 151 p += hdrlen; 152 switch (af) { 153 154 case AF_INET: 155 #if OPENBSD_AF_INET != AF_INET 156 case OPENBSD_AF_INET: /* XXX: read pcap files */ 157 #endif 158 ip_print(gndo, p, length); 159 break; 160 161 #ifdef INET6 162 case AF_INET6: 163 #if OPENBSD_AF_INET6 != AF_INET6 164 case OPENBSD_AF_INET6: /* XXX: read pcap files */ 165 #endif 166 ip6_print(gndo, p, length); 167 break; 168 #endif 169 170 default: 171 /* address family not handled, print raw packet */ 172 if (!eflag) 173 pflog_print(hdr); 174 if (!suppress_default_print) 175 default_print(p, caplen); 176 } 177 178 return (hdrlen); 179 trunc: 180 printf("[|pflog]"); 181 return (hdrlen); 182 } 183 184 /* 185 * Local Variables: 186 * c-style: whitesmith 187 * c-basic-offset: 8 188 * End: 189 */ 190