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#include <sys/cdefs.h>
24#ifndef lint
25#if 0
26static const char rcsid[] _U_ =
27    "@(#) Header: /tcpdump/master/tcpdump/print-lane.c,v 1.25 2005-11-13 12:12:42 guy Exp (LBL)";
28#else
29__RCSID("$NetBSD$");
30#endif
31#endif
32
33#ifdef HAVE_CONFIG_H
34#include "config.h"
35#endif
36
37#include <tcpdump-stdinc.h>
38
39#include <stdio.h>
40#include <pcap.h>
41
42#include "interface.h"
43#include "addrtoname.h"
44#include "extract.h"
45#include "ether.h"
46#include "lane.h"
47
48static const struct tok lecop2str[] = {
49	{ 0x0001,	"configure request" },
50	{ 0x0101,	"configure response" },
51	{ 0x0002,	"join request" },
52	{ 0x0102,	"join response" },
53	{ 0x0003,	"ready query" },
54	{ 0x0103,	"ready indication" },
55	{ 0x0004,	"register request" },
56	{ 0x0104,	"register response" },
57	{ 0x0005,	"unregister request" },
58	{ 0x0105,	"unregister response" },
59	{ 0x0006,	"ARP request" },
60	{ 0x0106,	"ARP response" },
61	{ 0x0007,	"flush request" },
62	{ 0x0107,	"flush response" },
63	{ 0x0008,	"NARP request" },
64	{ 0x0009,	"topology request" },
65	{ 0,		NULL }
66};
67
68static void
69lane_hdr_print(const u_char *bp)
70{
71	(void)printf("lecid:%x ", EXTRACT_16BITS(bp));
72}
73
74/*
75 * This is the top level routine of the printer.  'p' points
76 * to the LANE header of the packet, 'h->ts' is the timestamp,
77 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
78 * is the number of bytes actually captured.
79 *
80 * This assumes 802.3, not 802.5, LAN emulation.
81 */
82void
83lane_print(const u_char *p, u_int length, u_int caplen)
84{
85	struct lane_controlhdr *lec;
86
87	if (caplen < sizeof(struct lane_controlhdr)) {
88		printf("[|lane]");
89		return;
90	}
91
92	lec = (struct lane_controlhdr *)p;
93	if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) {
94		/*
95		 * LE Control.
96		 */
97		printf("lec: proto %x vers %x %s",
98		    lec->lec_proto, lec->lec_vers,
99		    tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode)));
100		return;
101	}
102
103	/*
104	 * Go past the LE header.
105	 */
106	length -= 2;
107	caplen -= 2;
108	p += 2;
109
110	/*
111	 * Now print the encapsulated frame, under the assumption
112	 * that it's an Ethernet frame.
113	 */
114	ether_print(p, length, caplen, lane_hdr_print, p - 2);
115}
116
117u_int
118lane_if_print(const struct pcap_pkthdr *h, const u_char *p)
119{
120	lane_print(p, h->len, h->caplen);
121
122	return (sizeof(struct lecdatahdr_8023));
123}
124