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 Token-Ring IEEE 802.5 interface.
7 *
8 * Version:	@(#)if_tr.h	0.0	07/11/94
9 *
10 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *		Donald Becker, <becker@super.org>
12 *    Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
13 *
14 *		This program is free software; you can redistribute it and/or
15 *		modify it under the terms of the GNU General Public License
16 *		as published by the Free Software Foundation; either version
17 *		2 of the License, or (at your option) any later version.
18 */
19#ifndef _LINUX_IF_TR_H
20#define _LINUX_IF_TR_H
21
22
23/* IEEE 802.5 Token-Ring magic constants.  The frame sizes omit the preamble
24   and FCS/CRC (frame check sequence). */
25#define TR_ALEN	6		/* Octets in one ethernet addr	 */
26#define TR_HLEN   (sizeof(struct trh_hdr)+sizeof(struct trllc))
27#define AC			0x10
28#define LLC_FRAME 0x40
29
30
31/* LLC and SNAP constants */
32#define EXTENDED_SAP 0xAA
33#define UI_CMD       0x03
34
35/* This is an Token-Ring frame header. */
36struct trh_hdr {
37	__u8  ac;			/* access control field */
38	__u8  fc;			/* frame control field */
39	__u8  daddr[TR_ALEN];		/* destination address */
40	__u8  saddr[TR_ALEN];		/* source address */
41	__u16 rcf;			/* route control field */
42	__u16 rseg[8];			/* routing registers */
43};
44
45/* This is an Token-Ring LLC structure */
46struct trllc {
47	__u8  dsap;			/* destination SAP */
48	__u8  ssap;			/* source SAP */
49	__u8  llc;			/* LLC control field */
50	__u8  protid[3];		/* protocol id */
51	__u16 ethertype;		/* ether type field */
52};
53
54/* Token-Ring statistics collection data. */
55struct tr_statistics {
56	unsigned long rx_packets;       /* total packets received	*/
57	unsigned long tx_packets;	/* total packets transmitted	*/
58	unsigned long rx_bytes;		/* total bytes received   	*/
59	unsigned long tx_bytes;		/* total bytes transmitted	*/
60	unsigned long rx_errors;	/* bad packets received		*/
61	unsigned long tx_errors;	/* packet transmit problems	*/
62	unsigned long rx_dropped;	/* no space in linux buffers	*/
63	unsigned long tx_dropped;	/* no space available in linux	*/
64	unsigned long multicast;	/* multicast packets received	*/
65	unsigned long transmit_collision;
66
67	/* detailed Token-Ring errors. See IBM Token-Ring Network
68	   Architecture for more info */
69
70	unsigned long line_errors;
71	unsigned long internal_errors;
72	unsigned long burst_errors;
73	unsigned long A_C_errors;
74	unsigned long abort_delimiters;
75	unsigned long lost_frames;
76	unsigned long recv_congest_count;
77	unsigned long frame_copied_errors;
78	unsigned long frequency_errors;
79	unsigned long token_errors;
80	unsigned long dummy1;
81};
82
83/* source routing stuff */
84
85#define TR_RII 0x80
86#define TR_RCF_DIR_BIT 0x80
87#define TR_RCF_LEN_MASK 0x1f00
88#define TR_RCF_BROADCAST 0x8000         /* all-routes broadcast */
89#define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
90#define TR_RCF_FRAME2K 0x20
91#define TR_RCF_BROADCAST_MASK 0xC000
92#define TR_MAXRIFLEN 18
93
94#endif	/* _LINUX_IF_TR_H */
95