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__RCSID("$NetBSD: print-lane.c,v 1.7 2023/08/17 20:19:40 christos Exp $");
26#endif
27
28/* \summary: ATM LANE printer */
29
30#ifdef HAVE_CONFIG_H
31#include <config.h>
32#endif
33
34#include "netdissect-stdinc.h"
35
36#define ND_LONGJMP_FROM_TCHECK
37#include "netdissect.h"
38#include "extract.h"
39
40struct lecdatahdr_8023 {
41  nd_uint16_t le_header;
42  nd_mac_addr h_dest;
43  nd_mac_addr h_source;
44  nd_uint16_t h_type;
45};
46
47struct lane_controlhdr {
48  nd_uint16_t lec_header;
49  nd_uint8_t  lec_proto;
50  nd_uint8_t  lec_vers;
51  nd_uint16_t lec_opcode;
52};
53
54static const struct tok lecop2str[] = {
55	{ 0x0001,	"configure request" },
56	{ 0x0101,	"configure response" },
57	{ 0x0002,	"join request" },
58	{ 0x0102,	"join response" },
59	{ 0x0003,	"ready query" },
60	{ 0x0103,	"ready indication" },
61	{ 0x0004,	"register request" },
62	{ 0x0104,	"register response" },
63	{ 0x0005,	"unregister request" },
64	{ 0x0105,	"unregister response" },
65	{ 0x0006,	"ARP request" },
66	{ 0x0106,	"ARP response" },
67	{ 0x0007,	"flush request" },
68	{ 0x0107,	"flush response" },
69	{ 0x0008,	"NARP request" },
70	{ 0x0009,	"topology request" },
71	{ 0,		NULL }
72};
73
74static void
75lane_hdr_print(netdissect_options *ndo, const u_char *bp)
76{
77	ND_PRINT("lecid:%x ", GET_BE_U_2(bp));
78}
79
80/*
81 * This assumes 802.3, not 802.5, LAN emulation.
82 */
83void
84lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
85{
86	const struct lane_controlhdr *lec;
87
88	ndo->ndo_protocol = "lane";
89
90	lec = (const struct lane_controlhdr *)p;
91	if (GET_BE_U_2(lec->lec_header) == 0xff00) {
92		/*
93		 * LE Control.
94		 */
95		ND_PRINT("lec: proto %x vers %x %s",
96			 GET_U_1(lec->lec_proto),
97			 GET_U_1(lec->lec_vers),
98			 tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode)));
99		return;
100	}
101
102	/*
103	 * Go past the LE header.
104	 */
105	ND_TCHECK_2(p); /* Needed */
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(ndo, p, length, caplen, lane_hdr_print, p - 2);
115}
116