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 "extract.h"
39#include "arcnet.h"
40
41static int arcnet_encap_print(u_char arctype, const u_char *p,
42    u_int length, u_int caplen);
43
44struct tok arctypemap[] = {
45	{ ARCTYPE_IP_OLD,	"oldip" },
46	{ ARCTYPE_ARP_OLD,	"oldarp" },
47	{ ARCTYPE_IP,		"ip" },
48	{ ARCTYPE_ARP,		"arp" },
49	{ ARCTYPE_REVARP,	"rarp" },
50	{ ARCTYPE_ATALK,	"atalk" },
51	{ ARCTYPE_BANIAN,	"banyan" },
52	{ ARCTYPE_IPX,		"ipx" },
53	{ ARCTYPE_INET6,	"ipv6" },
54	{ ARCTYPE_DIAGNOSE,	"diag" },
55	{ 0, 0 }
56};
57
58static inline void
59arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid)
60{
61	const struct arc_header *ap;
62	const char *arctypename;
63
64
65	ap = (const struct arc_header *)bp;
66
67
68	if (qflag) {
69		(void)printf("%02x %02x %d: ",
70			     ap->arc_shost,
71			     ap->arc_dhost,
72			     length);
73		return;
74	}
75
76	arctypename = tok2str(arctypemap, "%02x", ap->arc_type);
77
78	if (!phds) {
79		(void)printf("%02x %02x %s %d: ",
80			     ap->arc_shost, ap->arc_dhost, arctypename,
81			     length);
82			     return;
83	}
84
85	if (flag == 0) {
86		(void)printf("%02x %02x %s seqid %04x %d: ",
87			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
88			length);
89			return;
90	}
91
92	if (flag & 1)
93		(void)printf("%02x %02x %s seqid %04x "
94			"(first of %d fragments) %d: ",
95			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
96			(flag + 3) / 2, length);
97	else
98		(void)printf("%02x %02x %s seqid %04x "
99			"(fragment %d) %d: ",
100			ap->arc_shost, ap->arc_dhost, arctypename, seqid,
101			flag/2 + 1, length);
102}
103
104/*
105 * This is the top level routine of the printer.  'p' points
106 * to the ARCNET header of the packet, 'h->ts' is the timestamp,
107 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
108 * is the number of bytes actually captured.
109 */
110u_int
111arcnet_if_print(const struct pcap_pkthdr *h, const u_char *p)
112{
113	u_int caplen = h->caplen;
114	u_int length = h->len;
115	const struct arc_header *ap;
116
117	int phds, flag = 0, archdrlen = 0;
118	u_int seqid = 0;
119	u_char arc_type;
120
121	if (caplen < ARC_HDRLEN) {
122		printf("[|arcnet]");
123		return (caplen);
124	}
125
126	ap = (const struct arc_header *)p;
127	arc_type = ap->arc_type;
128
129	switch (arc_type) {
130	default:
131		phds = 1;
132		break;
133	case ARCTYPE_IP_OLD:
134	case ARCTYPE_ARP_OLD:
135	case ARCTYPE_DIAGNOSE:
136		phds = 0;
137		archdrlen = ARC_HDRLEN;
138		break;
139	}
140
141	if (phds) {
142		if (caplen < ARC_HDRNEWLEN) {
143			arcnet_print(p, length, 0, 0, 0);
144			printf("[|phds]");
145			return (caplen);
146		}
147
148		if (ap->arc_flag == 0xff) {
149			if (caplen < ARC_HDRNEWLEN_EXC) {
150				arcnet_print(p, length, 0, 0, 0);
151				printf("[|phds extended]");
152				return (caplen);
153			}
154			flag = ap->arc_flag2;
155			seqid = EXTRACT_16BITS(&ap->arc_seqid2);
156			archdrlen = ARC_HDRNEWLEN_EXC;
157		} else {
158			flag = ap->arc_flag;
159			seqid = EXTRACT_16BITS(&ap->arc_seqid);
160			archdrlen = ARC_HDRNEWLEN;
161		}
162	}
163
164
165	if (eflag)
166		arcnet_print(p, length, phds, flag, seqid);
167
168	/*
169	 * Go past the ARCNET header.
170	 */
171	length -= archdrlen;
172	caplen -= archdrlen;
173	p += archdrlen;
174
175	if (phds && flag && (flag & 1) == 0) {
176		/*
177		 * This is a middle fragment.
178		 */
179		return (archdrlen);
180	}
181
182	if (!arcnet_encap_print(arc_type, p, length, caplen))
183		default_print(p, caplen);
184
185	return (archdrlen);
186}
187
188/*
189 * This is the top level routine of the printer.  'p' points
190 * to the ARCNET header of the packet, 'h->ts' is the timestamp,
191 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
192 * is the number of bytes actually captured.  It is quite similar
193 * to the non-Linux style printer except that Linux doesn't ever
194 * supply packets that look like exception frames, it always supplies
195 * reassembled packets rather than raw frames, and headers have an
196 * extra "offset" field between the src/dest and packet type.
197 */
198u_int
199arcnet_linux_if_print(const struct pcap_pkthdr *h, const u_char *p)
200{
201	u_int caplen = h->caplen;
202	u_int length = h->len;
203	const struct arc_linux_header *ap;
204
205	int archdrlen = 0;
206	u_char arc_type;
207
208	if (caplen < ARC_LINUX_HDRLEN) {
209		printf("[|arcnet]");
210		return (caplen);
211	}
212
213	ap = (const struct arc_linux_header *)p;
214	arc_type = ap->arc_type;
215
216	switch (arc_type) {
217	default:
218		archdrlen = ARC_LINUX_HDRNEWLEN;
219		if (caplen < ARC_LINUX_HDRNEWLEN) {
220			printf("[|arcnet]");
221			return (caplen);
222		}
223		break;
224	case ARCTYPE_IP_OLD:
225	case ARCTYPE_ARP_OLD:
226	case ARCTYPE_DIAGNOSE:
227		archdrlen = ARC_LINUX_HDRLEN;
228		break;
229	}
230
231	if (eflag)
232		arcnet_print(p, length, 0, 0, 0);
233
234	/*
235	 * Go past the ARCNET header.
236	 */
237	length -= archdrlen;
238	caplen -= archdrlen;
239	p += archdrlen;
240
241	if (!arcnet_encap_print(arc_type, p, length, caplen))
242		default_print(p, caplen);
243
244	return (archdrlen);
245}
246
247/*
248 * Prints the packet encapsulated in an ARCnet data field,
249 * given the ARCnet system code.
250 *
251 * Returns non-zero if it can do so, zero if the system code is unknown.
252 */
253
254
255static int
256arcnet_encap_print(u_char arctype, const u_char *p,
257    u_int length, u_int caplen)
258{
259	switch (arctype) {
260
261	case ARCTYPE_IP_OLD:
262	case ARCTYPE_IP:
263	        ip_print(gndo, p, length);
264		return (1);
265
266#ifdef INET6
267	case ARCTYPE_INET6:
268		ip6_print(gndo, p, length);
269		return (1);
270#endif /*INET6*/
271
272	case ARCTYPE_ARP_OLD:
273	case ARCTYPE_ARP:
274	case ARCTYPE_REVARP:
275		arp_print(gndo, p, length, caplen);
276		return (1);
277
278	case ARCTYPE_ATALK:	/* XXX was this ever used? */
279		if (vflag)
280			fputs("et1 ", stdout);
281		atalk_print(p, length);
282		return (1);
283
284	case ARCTYPE_IPX:
285		ipx_print(p, length);
286		return (1);
287
288	default:
289		return (0);
290	}
291}
292
293/*
294 * Local Variables:
295 * c-style: bsd
296 * End:
297 */
298
299