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
23static 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/pfvar.h>
38#include <net/if_pflog.h>
39
40#include <tcpdump-stdinc.h>
41
42#include <stdio.h>
43#include <pcap.h>
44
45#include "extract.h"
46#include "interface.h"
47#include "addrtoname.h"
48
49static const 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
68static const 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
82static const 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
93static void
94pflog_print(const struct pfloghdr *hdr)
95{
96	u_int32_t rulenr, subrulenr;
97
98	rulenr = EXTRACT_32BITS(&hdr->rulenr);
99	subrulenr = EXTRACT_32BITS(&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
112u_int
113pflog_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(gndo, 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);
178trunc:
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