1/*
2 * INET		An implementation of the TCP/IP protocol suite for the LINUX
3 *		operating system.  INET is implemented using the BSD Socket
4 *		interface as the means of communication with the user level.
5 *
6 *		Global definitions for the ANSI FDDI interface.
7 *
8 * Version:	@(#)if_fddi.h	1.0.2	Sep 29 2004
9 *
10 * Author:	Lawrence V. Stefani, <stefani@lkg.dec.com>
11 *
12 *		if_fddi.h is based on previous if_ether.h and if_tr.h work by
13 *			Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
14 *			Donald Becker, <becker@super.org>
15 *			Alan Cox, <alan@lxorguk.ukuu.org.uk>
16 *			Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
17 *			Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
18 *
19 *		This program is free software; you can redistribute it and/or
20 *		modify it under the terms of the GNU General Public License
21 *		as published by the Free Software Foundation; either version
22 *		2 of the License, or (at your option) any later version.
23 */
24#ifndef _UAPI_LINUX_IF_FDDI_H
25#define _UAPI_LINUX_IF_FDDI_H
26
27#include <linux/types.h>
28
29/*
30 *  Define max and min legal sizes.  The frame sizes do not include
31 *  4 byte FCS/CRC (frame check sequence).
32 */
33#define FDDI_K_ALEN		6	/* Octets in one FDDI address */
34#define FDDI_K_8022_HLEN	16	/* Total octets in 802.2 header */
35#define FDDI_K_SNAP_HLEN	21	/* Total octets in 802.2 SNAP header */
36#define FDDI_K_8022_ZLEN	16	/* Min octets in 802.2 frame sans
37					   FCS */
38#define FDDI_K_SNAP_ZLEN	21	/* Min octets in 802.2 SNAP frame sans
39					   FCS */
40#define FDDI_K_8022_DLEN	4475	/* Max octets in 802.2 payload */
41#define FDDI_K_SNAP_DLEN	4470	/* Max octets in 802.2 SNAP payload */
42#define FDDI_K_LLC_ZLEN		13	/* Min octets in LLC frame sans FCS */
43#define FDDI_K_LLC_LEN		4491	/* Max octets in LLC frame sans FCS */
44#define FDDI_K_OUI_LEN		3	/* Octets in OUI in 802.2 SNAP
45					   header */
46
47/* Define FDDI Frame Control (FC) Byte values */
48#define FDDI_FC_K_VOID			0x00
49#define FDDI_FC_K_NON_RESTRICTED_TOKEN	0x80
50#define FDDI_FC_K_RESTRICTED_TOKEN	0xC0
51#define FDDI_FC_K_SMT_MIN		0x41
52#define FDDI_FC_K_SMT_MAX		0x4F
53#define FDDI_FC_K_MAC_MIN		0xC1
54#define FDDI_FC_K_MAC_MAX		0xCF
55#define FDDI_FC_K_ASYNC_LLC_MIN		0x50
56#define FDDI_FC_K_ASYNC_LLC_DEF		0x54
57#define FDDI_FC_K_ASYNC_LLC_MAX		0x5F
58#define FDDI_FC_K_SYNC_LLC_MIN		0xD0
59#define FDDI_FC_K_SYNC_LLC_MAX		0xD7
60#define FDDI_FC_K_IMPLEMENTOR_MIN	0x60
61#define FDDI_FC_K_IMPLEMENTOR_MAX	0x6F
62#define FDDI_FC_K_RESERVED_MIN		0x70
63#define FDDI_FC_K_RESERVED_MAX		0x7F
64
65/* Define LLC and SNAP constants */
66#define FDDI_EXTENDED_SAP		0xAA
67#define FDDI_UI_CMD			0x03
68
69/* Define 802.2 Type 1 header */
70struct fddi_8022_1_hdr {
71	__u8	dsap;			/* destination service access point */
72	__u8	ssap;			/* source service access point */
73	__u8	ctrl;			/* control byte #1 */
74} __attribute__((packed));
75
76/* Define 802.2 Type 2 header */
77struct fddi_8022_2_hdr {
78	__u8	dsap;			/* destination service access point */
79	__u8	ssap;			/* source service access point */
80	__u8	ctrl_1;			/* control byte #1 */
81	__u8	ctrl_2;			/* control byte #2 */
82} __attribute__((packed));
83
84/* Define 802.2 SNAP header */
85struct fddi_snap_hdr {
86	__u8	dsap;			/* always 0xAA */
87	__u8	ssap;			/* always 0xAA */
88	__u8	ctrl;			/* always 0x03 */
89	__u8	oui[FDDI_K_OUI_LEN];	/* organizational universal id */
90	__be16	ethertype;		/* packet type ID field */
91} __attribute__((packed));
92
93/* Define FDDI LLC frame header */
94struct fddihdr {
95	__u8	fc;			/* frame control */
96	__u8	daddr[FDDI_K_ALEN];	/* destination address */
97	__u8	saddr[FDDI_K_ALEN];	/* source address */
98	union {
99		struct fddi_8022_1_hdr	llc_8022_1;
100		struct fddi_8022_2_hdr	llc_8022_2;
101		struct fddi_snap_hdr	llc_snap;
102	} hdr;
103} __attribute__((packed));
104
105
106#endif /* _UAPI_LINUX_IF_FDDI_H */
107