1/*
2 * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by Yen Yen Lim and
16	North Dakota State University
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/* \summary: SunATM DLPI capture printer */
34
35#ifdef HAVE_CONFIG_H
36#include <config.h>
37#endif
38
39#include "netdissect-stdinc.h"
40
41#define ND_LONGJMP_FROM_TCHECK
42#include "netdissect.h"
43#include "extract.h"
44
45#include "atm.h"
46
47/* SunATM header for ATM packet */
48#define DIR_POS		0	/* Direction (0x80 = transmit, 0x00 = receive) */
49#define VPI_POS		1	/* VPI */
50#define VCI_POS		2	/* VCI */
51#define PKT_BEGIN_POS   4	/* Start of the ATM packet */
52
53/* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */
54#define PT_LANE		0x01	/* LANE */
55#define PT_LLC		0x02	/* LLC encapsulation */
56
57/*
58 * This is the top level routine of the printer.  'p' points
59 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp,
60 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
61 * is the number of bytes actually captured.
62 */
63void
64sunatm_if_print(netdissect_options *ndo,
65                const struct pcap_pkthdr *h, const u_char *p)
66{
67	u_int caplen = h->caplen;
68	u_int length = h->len;
69	u_short vci;
70	u_char vpi;
71	u_int traftype;
72
73	ndo->ndo_protocol = "sunatm";
74
75	if (ndo->ndo_eflag) {
76		ND_PRINT(GET_U_1(p + DIR_POS) & 0x80 ? "Tx: " : "Rx: ");
77	}
78
79	switch (GET_U_1(p + DIR_POS) & 0x0f) {
80
81	case PT_LANE:
82		traftype = ATM_LANE;
83		break;
84
85	case PT_LLC:
86		traftype = ATM_LLC;
87		break;
88
89	default:
90		traftype = ATM_UNKNOWN;
91		break;
92	}
93
94	vpi = GET_U_1(p + VPI_POS);
95	vci = GET_BE_U_2(p + VCI_POS);
96
97	p += PKT_BEGIN_POS;
98	caplen -= PKT_BEGIN_POS;
99	length -= PKT_BEGIN_POS;
100	ndo->ndo_ll_hdr_len += PKT_BEGIN_POS;
101	atm_print(ndo, vpi, vci, traftype, p, length, caplen);
102}
103