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 1.13.2.4 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
53static 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
72static 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
86static 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
97static void
98pflog_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
116u_int
117pflog_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);
182trunc:
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