1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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 * From: NetBSD: print-arcnet.c,v 1.2 2000/04/24 13:02:28 itojun Exp
22 */
23#ifndef lint
24static const char rcsid[] _U_ =
25    "@(#) $Header: /tcpdump/master/tcpdump/print-arcnet.c,v 1.20 2005/04/06 21:32:38 mcr Exp $ (LBL)";
26#endif
27
28#ifdef HAVE_CONFIG_H
29#include "config.h"
30#endif
31
32#include <tcpdump-stdinc.h>
33
34#include <stdio.h>
35#include <pcap.h>
36
37#include "interface.h"
38#include "arcnet.h"
39
40static int arcnet_encap_print(u_char arctype, const u_char *p,
41    u_int length, u_int caplen);
42
43struct tok arctypemap[] = {
44	{ ARCTYPE_IP_OLD,	"oldip" },
45	{ ARCTYPE_ARP_OLD,	"oldarp" },
46	{ ARCTYPE_IP,		"ip" },
47	{ ARCTYPE_ARP,		"arp" },
48	{ ARCTYPE_REVARP,	"rarp" },
49	{ ARCTYPE_ATALK,	"atalk" },
50	{ ARCTYPE_BANIAN,	"banyan" },
51	{ ARCTYPE_IPX,		"ipx" },
52	{ ARCTYPE_INET6,	"ipv6" },
53	{ ARCTYPE_DIAGNOSE,	"diag" },
54	{ 0, 0 }
55};
56
57static inline void
58arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid)
59{
60	const struct arc_header *ap;
61	const char *arctypename;
62
63
64	ap = (const struct arc_header *)bp;
65
66
67	if (qflag) {
68		(void)printf("%02x %02x %d: ",
69			     ap->arc_shost,
70			     ap->arc_dhost,
71			     length);
72		return;
73	}
74
75	arctypename = tok2str(arctypemap, "%02x", ap->arc_type);
76
77	if (!phds) {
78		(void)printf("%02x %02x %s %d: ",
79			     ap->arc_shost, ap->arc_dhost, arctypename,
80			     length);
81			     return;
82	}
83
84	if (flag == 0) {
85		(void)printf("%02x %02x %s seqid %04x %d: ",
86			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
87			length);
88			return;
89	}
90
91	if (flag & 1)
92		(void)printf("%02x %02x %s seqid %04x "
93			"(first of %d fragments) %d: ",
94			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
95			(flag + 3) / 2, length);
96	else
97		(void)printf("%02x %02x %s seqid %04x "
98			"(fragment %d) %d: ",
99			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
100			flag/2 + 1, length);
101}
102
103/*
104 * This is the top level routine of the printer.  'p' points
105 * to the ARCNET header of the packet, 'h->ts' is the timestamp,
106 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
107 * is the number of bytes actually captured.
108 */
109u_int
110arcnet_if_print(const struct pcap_pkthdr *h, const u_char *p)
111{
112	u_int caplen = h->caplen;
113	u_int length = h->len;
114	const struct arc_header *ap;
115
116	int phds, flag = 0, archdrlen = 0;
117	u_int seqid = 0;
118	u_char arc_type;
119
120	if (caplen < ARC_HDRLEN) {
121		printf("[|arcnet]");
122		return (caplen);
123	}
124
125	ap = (const struct arc_header *)p;
126	arc_type = ap->arc_type;
127
128	switch (arc_type) {
129	default:
130		phds = 1;
131		break;
132	case ARCTYPE_IP_OLD:
133	case ARCTYPE_ARP_OLD:
134	case ARCTYPE_DIAGNOSE:
135		phds = 0;
136		archdrlen = ARC_HDRLEN;
137		break;
138	}
139
140	if (phds) {
141		if (caplen < ARC_HDRNEWLEN) {
142			arcnet_print(p, length, 0, 0, 0);
143			printf("[|phds]");
144			return (caplen);
145		}
146
147		if (ap->arc_flag == 0xff) {
148			if (caplen < ARC_HDRNEWLEN_EXC) {
149				arcnet_print(p, length, 0, 0, 0);
150				printf("[|phds extended]");
151				return (caplen);
152			}
153			flag = ap->arc_flag2;
154			seqid = ntohs(ap->arc_seqid2);
155			archdrlen = ARC_HDRNEWLEN_EXC;
156		} else {
157			flag = ap->arc_flag;
158			seqid = ntohs(ap->arc_seqid);
159			archdrlen = ARC_HDRNEWLEN;
160		}
161	}
162
163
164	if (eflag)
165		arcnet_print(p, length, phds, flag, seqid);
166
167	/*
168	 * Go past the ARCNET header.
169	 */
170	length -= archdrlen;
171	caplen -= archdrlen;
172	p += archdrlen;
173
174	if (phds && flag && (flag & 1) == 0) {
175		/*
176		 * This is a middle fragment.
177		 */
178		return (archdrlen);
179	}
180
181	if (!arcnet_encap_print(arc_type, p, length, caplen))
182		default_print(p, caplen);
183
184	return (archdrlen);
185}
186
187/*
188 * This is the top level routine of the printer.  'p' points
189 * to the ARCNET header of the packet, 'h->ts' is the timestamp,
190 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
191 * is the number of bytes actually captured.  It is quite similar
192 * to the non-Linux style printer except that Linux doesn't ever
193 * supply packets that look like exception frames, it always supplies
194 * reassembled packets rather than raw frames, and headers have an
195 * extra "offset" field between the src/dest and packet type.
196 */
197u_int
198arcnet_linux_if_print(const struct pcap_pkthdr *h, const u_char *p)
199{
200	u_int caplen = h->caplen;
201	u_int length = h->len;
202	const struct arc_linux_header *ap;
203
204	int archdrlen = 0;
205	u_char arc_type;
206
207	if (caplen < ARC_LINUX_HDRLEN) {
208		printf("[|arcnet]");
209		return (caplen);
210	}
211
212	ap = (const struct arc_linux_header *)p;
213	arc_type = ap->arc_type;
214
215	switch (arc_type) {
216	default:
217		archdrlen = ARC_LINUX_HDRNEWLEN;
218		if (caplen < ARC_LINUX_HDRNEWLEN) {
219			printf("[|arcnet]");
220			return (caplen);
221		}
222		break;
223	case ARCTYPE_IP_OLD:
224	case ARCTYPE_ARP_OLD:
225	case ARCTYPE_DIAGNOSE:
226		archdrlen = ARC_LINUX_HDRLEN;
227		break;
228	}
229
230	if (eflag)
231		arcnet_print(p, length, 0, 0, 0);
232
233	/*
234	 * Go past the ARCNET header.
235	 */
236	length -= archdrlen;
237	caplen -= archdrlen;
238	p += archdrlen;
239
240	if (!arcnet_encap_print(arc_type, p, length, caplen))
241		default_print(p, caplen);
242
243	return (archdrlen);
244}
245
246/*
247 * Prints the packet encapsulated in an ARCnet data field,
248 * given the ARCnet system code.
249 *
250 * Returns non-zero if it can do so, zero if the system code is unknown.
251 */
252
253
254static int
255arcnet_encap_print(u_char arctype, const u_char *p,
256    u_int length, u_int caplen)
257{
258	switch (arctype) {
259
260	case ARCTYPE_IP_OLD:
261	case ARCTYPE_IP:
262	        ip_print(gndo, p, length);
263		return (1);
264
265#ifdef INET6
266	case ARCTYPE_INET6:
267		ip6_print(p, length);
268		return (1);
269#endif /*INET6*/
270
271	case ARCTYPE_ARP_OLD:
272	case ARCTYPE_ARP:
273	case ARCTYPE_REVARP:
274	  arp_print(gndo, p, length, caplen);
275		return (1);
276
277	case ARCTYPE_ATALK:	/* XXX was this ever used? */
278		if (vflag)
279			fputs("et1 ", stdout);
280		atalk_print(p, length);
281		return (1);
282
283	case ARCTYPE_IPX:
284		ipx_print(p, length);
285		return (1);
286
287	default:
288		return (0);
289	}
290}
291
292/*
293 * Local Variables:
294 * c-style: bsd
295 * End:
296 */
297
298