2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
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
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.
22 /* \summary: OpenBSD packet filter log file printer */
28 #ifndef HAVE_NET_PFVAR_H
29 #error "No pf headers available"
31 #include <sys/types.h>
32 #include <sys/socket.h>
34 #include <net/pfvar.h>
35 #include <net/if_pflog.h>
37 #include <netdissect-stdinc.h>
39 #include "netdissect.h"
42 static const char tstr[] = "[|pflog]";
44 static const struct tok pf_reasons[] = {
46 { 1, "1(bad-offset)" },
49 { 4, "4(normalize)" },
51 { 6, "6(bad-timestamp)" },
52 { 7, "7(congestion)" },
53 { 8, "8(ip-option)" },
54 { 9, "9(proto-cksum)" },
55 { 10, "10(state-mismatch)" },
56 { 11, "11(state-insert)" },
57 { 12, "12(state-limit)" },
58 { 13, "13(src-limit)" },
59 { 14, "14(synproxy)" },
63 static const struct tok pf_actions[] = {
66 { PF_SCRUB, "scrub" },
69 { PF_BINAT, "binat" },
70 { PF_NOBINAT, "binat" },
73 { PF_SYNPROXY_DROP, "synproxy-drop" },
77 static const struct tok pf_directions[] = {
78 { PF_INOUT, "in/out" },
84 /* For reading capture files on other systems */
85 #define OPENBSD_AF_INET 2
86 #define OPENBSD_AF_INET6 24
89 pflog_print(netdissect_options *ndo, const struct pfloghdr *hdr)
91 uint32_t rulenr, subrulenr, ridentifier;
93 rulenr = EXTRACT_32BITS(&hdr->rulenr);
94 subrulenr = EXTRACT_32BITS(&hdr->subrulenr);
95 ridentifier = EXTRACT_32BITS(&hdr->ridentifier);
97 if (subrulenr == (uint32_t)-1)
98 ND_PRINT((ndo, "rule %u/", rulenr));
100 ND_PRINT((ndo, "rule %u.%s.%u/", rulenr, hdr->ruleset, subrulenr));
102 ND_PRINT((ndo, "%s", tok2str(pf_reasons, "unkn(%u)", hdr->reason)));
104 if (hdr->uid != UID_MAX)
105 ND_PRINT((ndo, " [uid %u]", (unsigned)hdr->uid));
107 if (ridentifier != 0)
108 ND_PRINT((ndo, " [ridentifier %u]", ridentifier));
110 ND_PRINT((ndo, ": %s %s on %s: ",
111 tok2str(pf_actions, "unkn(%u)", hdr->action),
112 tok2str(pf_directions, "unkn(%u)", hdr->dir),
117 pflog_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
118 register const u_char *p)
120 u_int length = h->len;
122 u_int caplen = h->caplen;
123 const struct pfloghdr *hdr;
127 if (caplen < sizeof(uint8_t)) {
128 ND_PRINT((ndo, "%s", tstr));
132 #define MIN_PFLOG_HDRLEN 45
133 hdr = (const struct pfloghdr *)p;
134 if (hdr->length < MIN_PFLOG_HDRLEN) {
135 ND_PRINT((ndo, "[pflog: invalid header length!]"));
136 return (hdr->length); /* XXX: not really */
138 hdrlen = BPF_WORDALIGN(hdr->length);
140 if (caplen < hdrlen) {
141 ND_PRINT((ndo, "%s", tstr));
142 return (hdrlen); /* XXX: true? */
145 /* print what we know */
148 pflog_print(ndo, hdr);
150 /* skip to the real packet */
158 #if OPENBSD_AF_INET != AF_INET
159 case OPENBSD_AF_INET: /* XXX: read pcap files */
161 ip_print(ndo, p, length);
164 #if defined(AF_INET6) || defined(OPENBSD_AF_INET6)
167 #endif /* AF_INET6 */
168 #if !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6
169 case OPENBSD_AF_INET6: /* XXX: read pcap files */
170 #endif /* !defined(AF_INET6) || OPENBSD_AF_INET6 != AF_INET6 */
171 ip6_print(ndo, p, length);
173 #endif /* defined(AF_INET6) || defined(OPENBSD_AF_INET6) */
176 /* address family not handled, print raw packet */
178 pflog_print(ndo, hdr);
179 if (!ndo->ndo_suppress_default_print)
180 ND_DEFAULTPRINT(p, caplen);
185 ND_PRINT((ndo, "%s", tstr));
191 * c-style: whitesmith