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 1.13.2.4 2007/09/13 17:18:10 gianluca 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 35 #include <sys/types.h> 36 #ifndef WIN32 37 #include <sys/socket.h> 38 #endif 39 #include <net/if.h> 40 #include <net/pfvar.h> 41 #include <net/if_pflog.h> 42 43 44 45 #include <tcpdump-stdinc.h> 46 47 #include <stdio.h> 48 #include <pcap.h> 49 50 #include "interface.h" 51 #include "addrtoname.h" 52 53 static struct tok pf_reasons[] = { 54 { 0, "0(match)" }, 55 { 1, "1(bad-offset)" }, 56 { 2, "2(fragment)" }, 57 { 3, "3(short)" }, 58 { 4, "4(normalize)" }, 59 { 5, "5(memory)" }, 60 { 6, "6(bad-timestamp)" }, 61 { 7, "7(congestion)" }, 62 { 8, "8(ip-option)" }, 63 { 9, "9(proto-cksum)" }, 64 { 10, "10(state-mismatch)" }, 65 { 11, "11(state-insert)" }, 66 { 12, "12(state-limit)" }, 67 { 13, "13(src-limit)" }, 68 { 14, "14(synproxy)" }, 69 { 0, NULL } 70 }; 71 72 static struct tok pf_actions[] = { 73 { PF_PASS, "pass" }, 74 { PF_DROP, "block" }, 75 { PF_SCRUB, "scrub" }, 76 { PF_NAT, "nat" }, 77 { PF_NONAT, "nat" }, 78 { PF_BINAT, "binat" }, 79 { PF_NOBINAT, "binat" }, 80 { PF_RDR, "rdr" }, 81 { PF_NORDR, "rdr" }, 82 { PF_SYNPROXY_DROP, "synproxy-drop" }, 83 { 0, NULL } 84 }; 85 86 static struct tok pf_directions[] = { 87 { PF_INOUT, "in/out" }, 88 { PF_IN, "in" }, 89 { PF_OUT, "out" }, 90 { 0, NULL } 91 }; 92 93 /* For reading capture files on other systems */ 94 #define OPENBSD_AF_INET 2 95 #define OPENBSD_AF_INET6 24 96 97 static void 98 pflog_print(const struct pfloghdr *hdr) 99 { 100 u_int32_t rulenr, subrulenr; 101 102 rulenr = ntohl(hdr->rulenr); 103 subrulenr = ntohl(hdr->subrulenr); 104 if (subrulenr == (u_int32_t)-1) 105 printf("rule %u/", rulenr); 106 else 107 printf("rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr); 108 109 printf("%s: %s %s on %s: ", 110 tok2str(pf_reasons, "unkn(%u)", hdr->reason), 111 tok2str(pf_actions, "unkn(%u)", hdr->action), 112 tok2str(pf_directions, "unkn(%u)", hdr->dir), 113 hdr->ifname); 114 } 115 116 u_int 117 pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) 118 { 119 u_int length = h->len; 120 u_int hdrlen; 121 u_int caplen = h->caplen; 122 const struct pfloghdr *hdr; 123 u_int8_t af; 124 125 /* check length */ 126 if (caplen < sizeof(u_int8_t)) { 127 printf("[|pflog]"); 128 return (caplen); 129 } 130 131 #define MIN_PFLOG_HDRLEN 45 132 hdr = (struct pfloghdr *)p; 133 if (hdr->length < MIN_PFLOG_HDRLEN) { 134 printf("[pflog: invalid header length!]"); 135 return (hdr->length); /* XXX: not really */ 136 } 137 hdrlen = BPF_WORDALIGN(hdr->length); 138 139 if (caplen < hdrlen) { 140 printf("[|pflog]"); 141 return (hdrlen); /* XXX: true? */ 142 } 143 144 /* print what we know */ 145 hdr = (struct pfloghdr *)p; 146 TCHECK(*hdr); 147 if (eflag) 148 pflog_print(hdr); 149 150 /* skip to the real packet */ 151 af = hdr->af; 152 length -= hdrlen; 153 caplen -= hdrlen; 154 p += hdrlen; 155 switch (af) { 156 157 case AF_INET: 158 #if OPENBSD_AF_INET != AF_INET 159 case OPENBSD_AF_INET: /* XXX: read pcap files */ 160 #endif 161 ip_print(gndo, p, length); 162 break; 163 164 #ifdef INET6 165 case AF_INET6: 166 #if OPENBSD_AF_INET6 != AF_INET6 167 case OPENBSD_AF_INET6: /* XXX: read pcap files */ 168 #endif 169 ip6_print(p, length); 170 break; 171 #endif 172 173 default: 174 /* address family not handled, print raw packet */ 175 if (!eflag) 176 pflog_print(hdr); 177 if (!suppress_default_print) 178 default_print(p, caplen); 179 } 180 181 return (hdrlen); 182 trunc: 183 printf("[|pflog]"); 184 return (hdrlen); 185 } 186 187 /* 188 * Local Variables: 189 * c-style: whitesmith 190 * c-basic-offset: 8 191 * End: 192 */ 193