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 1.7.2.4 2004/03/29 21:56:26 guy Exp $ (LBL)"; 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #include <tcpdump-stdinc.h> 32 33 #include <stdio.h> 34 #include <pcap.h> 35 36 #include "interface.h" 37 #include "addrtoname.h" 38 #include "pf.h" 39 40 static struct tok pf_reasons[] = { 41 { 0, "0(match)" }, 42 { 1, "1(bad-offset)" }, 43 { 2, "2(fragment)" }, 44 { 3, "3(short)" }, 45 { 4, "4(normalize)" }, 46 { 5, "5(memory)" }, 47 { 0, NULL } 48 }; 49 50 static struct tok pf_actions[] = { 51 { PF_PASS, "pass" }, 52 { PF_DROP, "block" }, 53 { PF_SCRUB, "scrub" }, 54 { PF_NAT, "nat" }, 55 { PF_NONAT, "nat" }, 56 { PF_BINAT, "binat" }, 57 { PF_NOBINAT, "binat" }, 58 { PF_RDR, "rdr" }, 59 { PF_NORDR, "rdr" }, 60 { PF_SYNPROXY_DROP, "synproxy-drop" }, 61 { 0, NULL } 62 }; 63 64 static struct tok pf_directions[] = { 65 { PF_INOUT, "in/out" }, 66 { PF_IN, "in" }, 67 { PF_OUT, "out" }, 68 { 0, NULL } 69 }; 70 71 /* For reading capture files on other systems */ 72 #define OPENBSD_AF_INET 2 73 #define OPENBSD_AF_INET6 24 74 75 static void 76 pflog_print(const struct pfloghdr *hdr) 77 { 78 if (ntohl(hdr->subrulenr) == (u_int32_t)-1) 79 printf("rule %u/", ntohl(hdr->rulenr)); 80 else 81 printf("rule %u.%s.%u/", ntohl(hdr->rulenr), hdr->ruleset, 82 ntohl(hdr->subrulenr)); 83 84 printf("%s: %s %s on %s: ", 85 tok2str(pf_reasons, "unkn(%u)", hdr->reason), 86 tok2str(pf_actions, "unkn(%u)", hdr->action), 87 tok2str(pf_directions, "unkn(%u)", hdr->dir), 88 hdr->ifname); 89 } 90 91 u_int 92 pflog_if_print(const struct pcap_pkthdr *h, register const u_char *p) 93 { 94 u_int length = h->len; 95 u_int hdrlen; 96 u_int caplen = h->caplen; 97 const struct pfloghdr *hdr; 98 u_int8_t af; 99 100 /* check length */ 101 if (caplen < sizeof(u_int8_t)) { 102 printf("[|pflog]"); 103 return (caplen); 104 } 105 106 #define MIN_PFLOG_HDRLEN 45 107 hdr = (struct pfloghdr *)p; 108 if (hdr->length < MIN_PFLOG_HDRLEN) { 109 printf("[pflog: invalid header length!]"); 110 return (hdr->length); /* XXX: not really */ 111 } 112 hdrlen = BPF_WORDALIGN(hdr->length); 113 114 if (caplen < hdrlen) { 115 printf("[|pflog]"); 116 return (hdrlen); /* XXX: true? */ 117 } 118 119 /* print what we know */ 120 hdr = (struct pfloghdr *)p; 121 TCHECK(*hdr); 122 if (eflag) 123 pflog_print(hdr); 124 125 /* skip to the real packet */ 126 af = hdr->af; 127 length -= hdrlen; 128 caplen -= hdrlen; 129 p += hdrlen; 130 switch (af) { 131 132 case AF_INET: 133 #if OPENBSD_AF_INET != AF_INET 134 case OPENBSD_AF_INET: /* XXX: read pcap files */ 135 #endif 136 ip_print(p, length); 137 break; 138 139 #ifdef INET6 140 case AF_INET6: 141 #if OPENBSD_AF_INET6 != AF_INET6 142 case OPENBSD_AF_INET6: /* XXX: read pcap files */ 143 #endif 144 ip6_print(p, length); 145 break; 146 #endif 147 148 default: 149 /* address family not handled, print raw packet */ 150 if (!eflag) 151 pflog_print(hdr); 152 if (!xflag && !qflag) 153 default_print(p, caplen); 154 } 155 156 return (hdrlen); 157 trunc: 158 printf("[|pflog]"); 159 return (hdrlen); 160 } 161