1/*
2 * Marko Kiiskila carnil@cs.tut.fi
3 *
4 * Tampere University of Technology - Telecommunications Laboratory
5 *
6 * Permission to use, copy, modify and distribute this
7 * software and its documentation is hereby granted,
8 * provided that both the copyright notice and this
9 * permission notice appear in all copies of the software,
10 * derivative works or modified versions, and any portions
11 * thereof, that both notices appear in supporting
12 * documentation, and that the use of this software is
13 * acknowledged in any publications resulting from using
14 * the software.
15 *
16 * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
18 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
19 * SOFTWARE.
20 *
21 */
22
23#ifndef lint
24static const char rcsid[] _U_ =
25    "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.25 2005-11-13 12:12:42 guy 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 "addrtoname.h"
39#include "extract.h"
40#include "ether.h"
41#include "lane.h"
42
43static const struct tok lecop2str[] = {
44	{ 0x0001,	"configure request" },
45	{ 0x0101,	"configure response" },
46	{ 0x0002,	"join request" },
47	{ 0x0102,	"join response" },
48	{ 0x0003,	"ready query" },
49	{ 0x0103,	"ready indication" },
50	{ 0x0004,	"register request" },
51	{ 0x0104,	"register response" },
52	{ 0x0005,	"unregister request" },
53	{ 0x0105,	"unregister response" },
54	{ 0x0006,	"ARP request" },
55	{ 0x0106,	"ARP response" },
56	{ 0x0007,	"flush request" },
57	{ 0x0107,	"flush response" },
58	{ 0x0008,	"NARP request" },
59	{ 0x0009,	"topology request" },
60	{ 0,		NULL }
61};
62
63static void
64lane_hdr_print(netdissect_options *ndo, const u_char *bp)
65{
66	(void)ND_PRINT((ndo, "lecid:%x ", EXTRACT_16BITS(bp)));
67}
68
69/*
70 * This is the top level routine of the printer.  'p' points
71 * to the LANE header of the packet, 'h->ts' is the timestamp,
72 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
73 * is the number of bytes actually captured.
74 *
75 * This assumes 802.3, not 802.5, LAN emulation.
76 */
77void
78lane_print(const u_char *p, u_int length, u_int caplen)
79{
80	struct lane_controlhdr *lec;
81
82	if (caplen < sizeof(struct lane_controlhdr)) {
83		printf("[|lane]");
84		return;
85	}
86
87	lec = (struct lane_controlhdr *)p;
88	if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) {
89		/*
90		 * LE Control.
91		 */
92		printf("lec: proto %x vers %x %s",
93		    lec->lec_proto, lec->lec_vers,
94		    tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode)));
95		return;
96	}
97
98	/*
99	 * Go past the LE header.
100	 */
101	length -= 2;
102	caplen -= 2;
103	p += 2;
104
105	/*
106	 * Now print the encapsulated frame, under the assumption
107	 * that it's an Ethernet frame.
108	 */
109	ether_print(gndo, p, length, caplen, lane_hdr_print, p - 2);
110}
111
112u_int
113lane_if_print(const struct pcap_pkthdr *h, const u_char *p)
114{
115	lane_print(p, h->len, h->caplen);
116
117	return (sizeof(struct lecdatahdr_8023));
118}
119