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 FCS */
37#define FDDI_K_SNAP_ZLEN	21		/* Min octets in 802.2 SNAP frame sans FCS */
38#define FDDI_K_8022_DLEN	4475	/* Max octets in 802.2 payload */
39#define FDDI_K_SNAP_DLEN	4470	/* Max octets in 802.2 SNAP payload */
40#define FDDI_K_LLC_ZLEN		13		/* Min octets in LLC frame sans FCS */
41#define FDDI_K_LLC_LEN		4491	/* Max octets in LLC frame sans FCS */
42
43/* Define FDDI Frame Control (FC) Byte values */
44#define FDDI_FC_K_VOID					0x00
45#define FDDI_FC_K_NON_RESTRICTED_TOKEN	0x80
46#define FDDI_FC_K_RESTRICTED_TOKEN		0xC0
47#define FDDI_FC_K_SMT_MIN				0x41
48#define FDDI_FC_K_SMT_MAX		   		0x4F
49#define FDDI_FC_K_MAC_MIN				0xC1
50#define FDDI_FC_K_MAC_MAX		  		0xCF
51#define FDDI_FC_K_ASYNC_LLC_MIN			0x50
52#define FDDI_FC_K_ASYNC_LLC_DEF			0x54
53#define FDDI_FC_K_ASYNC_LLC_MAX			0x5F
54#define FDDI_FC_K_SYNC_LLC_MIN			0xD0
55#define FDDI_FC_K_SYNC_LLC_MAX			0xD7
56#define FDDI_FC_K_IMPLEMENTOR_MIN		0x60
57#define FDDI_FC_K_IMPLEMENTOR_MAX  		0x6F
58#define FDDI_FC_K_RESERVED_MIN			0x70
59#define FDDI_FC_K_RESERVED_MAX			0x7F
60
61/* Define LLC and SNAP constants */
62#define FDDI_EXTENDED_SAP	0xAA
63#define FDDI_UI_CMD			0x03
64
65/* Define 802.2 Type 1 header */
66struct fddi_8022_1_hdr {
67	__u8	dsap;					/* destination service access point */
68	__u8	ssap;					/* source service access point */
69	__u8	ctrl;					/* control byte #1 */
70} __attribute__((packed));
71
72/* Define 802.2 Type 2 header */
73struct fddi_8022_2_hdr {
74	__u8	dsap;					/* destination service access point */
75	__u8	ssap;					/* source service access point */
76	__u8	ctrl_1;					/* control byte #1 */
77	__u8	ctrl_2;					/* control byte #2 */
78} __attribute__((packed));
79
80/* Define 802.2 SNAP header */
81#define FDDI_K_OUI_LEN	3
82struct fddi_snap_hdr {
83	__u8	dsap;					/* always 0xAA */
84	__u8	ssap;					/* always 0xAA */
85	__u8	ctrl;					/* always 0x03 */
86	__u8	oui[FDDI_K_OUI_LEN];	/* organizational universal id */
87	__be16	ethertype;				/* packet type ID field */
88} __attribute__((packed));
89
90/* Define FDDI LLC frame header */
91struct fddihdr {
92	__u8	fc;						/* frame control */
93	__u8	daddr[FDDI_K_ALEN];		/* destination address */
94	__u8	saddr[FDDI_K_ALEN];		/* source address */
95	union
96		{
97		struct fddi_8022_1_hdr		llc_8022_1;
98		struct fddi_8022_2_hdr		llc_8022_2;
99		struct fddi_snap_hdr		llc_snap;
100		} hdr;
101} __attribute__((packed));
102
103
104#endif /* _UAPI_LINUX_IF_FDDI_H */
105