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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#include <asm/byteorder.h> /* For __be16 */
23
24/* IEEE 802.5 Token-Ring magic constants. The frame sizes omit the preamble
25 and FCS/CRC (frame check sequence). */
26#define TR_ALEN 6 /* Octets in one token-ring addr */
27#define TR_HLEN (sizeof(struct trh_hdr)+sizeof(struct trllc))
28#define AC 0x10
29#define LLC_FRAME 0x40
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 __be16 rcf; /* route control field */
42 __be16 rseg[8]; /* routing registers */
43};
44
45#ifdef __KERNEL__
46#include <linux/skbuff.h>
47
48static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb)
49{
50 return (struct trh_hdr *)skb->mac.raw;
51}
52#endif
53
54/* This is an Token-Ring LLC structure */
55struct trllc {
56 __u8 dsap; /* destination SAP */
57 __u8 ssap; /* source SAP */
58 __u8 llc; /* LLC control field */
59 __u8 protid[3]; /* protocol id */
60 __be16 ethertype; /* ether type field */
61};
62
63/* Token-Ring statistics collection data. */
64struct tr_statistics {
65 unsigned long rx_packets; /* total packets received */
66 unsigned long tx_packets; /* total packets transmitted */
67 unsigned long rx_bytes; /* total bytes received */
68 unsigned long tx_bytes; /* total bytes transmitted */
69 unsigned long rx_errors; /* bad packets received */
70 unsigned long tx_errors; /* packet transmit problems */
71 unsigned long rx_dropped; /* no space in linux buffers */
72 unsigned long tx_dropped; /* no space available in linux */
73 unsigned long multicast; /* multicast packets received */
74 unsigned long transmit_collision;
75
76 /* detailed Token-Ring errors. See IBM Token-Ring Network
77 Architecture for more info */
78
79 unsigned long line_errors;
80 unsigned long internal_errors;
81 unsigned long burst_errors;
82 unsigned long A_C_errors;
83 unsigned long abort_delimiters;
84 unsigned long lost_frames;
85 unsigned long recv_congest_count;
86 unsigned long frame_copied_errors;
87 unsigned long frequency_errors;
88 unsigned long token_errors;
89 unsigned long dummy1;
90};
91
92/* source routing stuff */
93#define TR_RII 0x80
94#define TR_RCF_DIR_BIT 0x80
95#define TR_RCF_LEN_MASK 0x1f00
96#define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */
97#define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
98#define TR_RCF_FRAME2K 0x20
99#define TR_RCF_BROADCAST_MASK 0xC000
100#define TR_MAXRIFLEN 18
101
102#endif /* _LINUX_IF_TR_H */