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 1.23.2.2 2005/11/13 12:12:59 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 inline void
64lane_hdr_print(register const u_char *bp, int length)
65{
66	register const struct lecdatahdr_8023 *ep;
67
68	ep = (const struct lecdatahdr_8023 *)bp;
69	if (qflag)
70		(void)printf("lecid:%x %s %s %d: ",
71			     EXTRACT_16BITS(&ep->le_header),
72			     etheraddr_string(ep->h_source),
73			     etheraddr_string(ep->h_dest),
74			     length);
75	else
76		(void)printf("lecid:%x %s %s %s %d: ",
77			     EXTRACT_16BITS(&ep->le_header),
78			     etheraddr_string(ep->h_source),
79			     etheraddr_string(ep->h_dest),
80			     etherproto_string(ep->h_type),
81			     length);
82}
83
84/*
85 * This is the top level routine of the printer.  'p' points
86 * to the LANE header of the packet, 'h->ts' is the timestamp,
87 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
88 * is the number of bytes actually captured.
89 *
90 * This assumes 802.3, not 802.5, LAN emulation.
91 */
92void
93lane_print(const u_char *p, u_int length, u_int caplen)
94{
95	struct lane_controlhdr *lec;
96	struct lecdatahdr_8023 *ep;
97	u_short ether_type;
98	u_short extracted_ethertype;
99
100	if (caplen < sizeof(struct lane_controlhdr)) {
101		printf("[|lane]");
102		return;
103	}
104
105	lec = (struct lane_controlhdr *)p;
106	if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) {
107		/*
108		 * LE Control.
109		 */
110		printf("lec: proto %x vers %x %s",
111		    lec->lec_proto, lec->lec_vers,
112		    tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode)));
113		return;
114	}
115
116	if (caplen < sizeof(struct lecdatahdr_8023)) {
117		printf("[|lane]");
118		return;
119	}
120
121	if (eflag)
122		lane_hdr_print(p, length);
123
124	/*
125	 * Go past the LANE header.
126	 */
127	length -= sizeof(struct lecdatahdr_8023);
128	caplen -= sizeof(struct lecdatahdr_8023);
129	ep = (struct lecdatahdr_8023 *)p;
130	p += sizeof(struct lecdatahdr_8023);
131
132	ether_type = EXTRACT_16BITS(&ep->h_type);
133
134	/*
135	 * Is it (gag) an 802.3 encapsulation?
136	 */
137	if (ether_type <= ETHERMTU) {
138		/* Try to print the LLC-layer header & higher layers */
139		if (llc_print(p, length, caplen, ep->h_source, ep->h_dest,
140		    &extracted_ethertype) == 0) {
141			/* ether_type not known, print raw packet */
142			if (!eflag)
143				lane_hdr_print((u_char *)ep, length + sizeof(*ep));
144			if (extracted_ethertype) {
145				printf("(LLC %s) ",
146			       etherproto_string(htons(extracted_ethertype)));
147			}
148			if (!suppress_default_print)
149				default_print(p, caplen);
150		}
151	} else if (ether_encap_print(ether_type, p, length, caplen,
152	    &extracted_ethertype) == 0) {
153		/* ether_type not known, print raw packet */
154		if (!eflag)
155			lane_hdr_print((u_char *)ep, length + sizeof(*ep));
156		if (!suppress_default_print)
157			default_print(p, caplen);
158	}
159}
160
161u_int
162lane_if_print(const struct pcap_pkthdr *h, const u_char *p)
163{
164	lane_print(p, h->len, h->caplen);
165
166	return (sizeof(struct lecdatahdr_8023));
167}
168