1/*
2 * Copyright (c) 1992, 1993, 1994, 1995, 1996
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * @(#) $Header: /tcpdump/master/tcpdump/fddi.h,v 1.11 2002-12-11 07:13:51 guy Exp $ (LBL)
22 */
23
24/*
25 * Based on Ultrix if_fddi.h
26 */
27
28/*
29 * This stuff should come from a system header file, but there's no
30 * obviously portable way to do that and it's not really going
31 * to change from system to system (except for the padding business).
32 */
33
34struct fddi_header {
35	u_char  fddi_fc;		/* frame control */
36	u_char  fddi_dhost[6];
37	u_char  fddi_shost[6];
38};
39
40/*
41 * Length of an FDDI header; note that some compilers may pad
42 * "struct fddi_header" to a multiple of 4 bytes, for example, so
43 * "sizeof (struct fddi_header)" may not give the right
44 * answer.
45 */
46#define FDDI_HDRLEN 13
47
48/* Useful values for fddi_fc (frame control) field */
49
50/*
51 * FDDI Frame Control bits
52 */
53#define	FDDIFC_C		0x80		/* Class bit */
54#define	FDDIFC_L		0x40		/* Address length bit */
55#define	FDDIFC_F		0x30		/* Frame format bits */
56#define	FDDIFC_Z		0x0f		/* Control bits */
57
58/*
59 * FDDI Frame Control values. (48-bit addressing only).
60 */
61#define	FDDIFC_VOID		0x40		/* Void frame */
62#define	FDDIFC_NRT		0x80		/* Nonrestricted token */
63#define	FDDIFC_RT		0xc0		/* Restricted token */
64#define	FDDIFC_SMT_INFO		0x41		/* SMT Info */
65#define	FDDIFC_SMT_NSA		0x4F		/* SMT Next station adrs */
66#define	FDDIFC_MAC_BEACON	0xc2		/* MAC Beacon frame */
67#define	FDDIFC_MAC_CLAIM	0xc3		/* MAC Claim frame */
68#define	FDDIFC_LLC_ASYNC	0x50		/* Async. LLC frame */
69#define	FDDIFC_LLC_SYNC		0xd0		/* Sync. LLC frame */
70#define	FDDIFC_IMP_ASYNC	0x60		/* Implementor Async. */
71#define	FDDIFC_IMP_SYNC		0xe0		/* Implementor Synch. */
72#define FDDIFC_SMT		0x40		/* SMT frame */
73#define FDDIFC_MAC		0xc0		/* MAC frame */
74
75#define	FDDIFC_CLFF		0xF0		/* Class/Length/Format bits */
76#define	FDDIFC_ZZZZ		0x0F		/* Control bits */
77