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 #if 0
30 #define ETH_HLEN 14 /* Total octets in header. */
31 #define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
32 #define ETH_DATA_LEN 1500 /* Max. octets in payload */
33 #define ETH_FRAME_LEN 1514 /* Max. octets in frame sans FCS */
34 #endif
35
36
37 /* LLC and SNAP constants */
38 #define EXTENDED_SAP 0xAA
39 #define UI_CMD 0x03
40
41 /* This is an Token-Ring frame header. */
42 struct trh_hdr {
43 __u8 ac; /* access control field */
44 __u8 fc; /* frame control field */
45 __u8 daddr[TR_ALEN]; /* destination address */
46 __u8 saddr[TR_ALEN]; /* source address */
47 __u16 rcf; /* route control field */
48 __u16 rseg[8]; /* routing registers */
49 };
50
51 #ifdef __KERNEL__
52 #include <linux/skbuff.h>
53
54 static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb)
55 {
56 return (struct trh_hdr *)skb->mac.raw;
57 }
58 #endif
59
60 /* This is an Token-Ring LLC structure */
61 struct trllc {
62 __u8 dsap; /* destination SAP */
63 __u8 ssap; /* source SAP */
64 __u8 llc; /* LLC control field */
65 __u8 protid[3]; /* protocol id */
66 __u16 ethertype; /* ether type field */
67 };
68
69 /* Token-Ring statistics collection data. */
70 struct tr_statistics {
71 unsigned long rx_packets; /* total packets received */
72 unsigned long tx_packets; /* total packets transmitted */
73 unsigned long rx_bytes; /* total bytes received */
74 unsigned long tx_bytes; /* total bytes transmitted */
75 unsigned long rx_errors; /* bad packets received */
76 unsigned long tx_errors; /* packet transmit problems */
77 unsigned long rx_dropped; /* no space in linux buffers */
78 unsigned long tx_dropped; /* no space available in linux */
79 unsigned long multicast; /* multicast packets received */
80 unsigned long transmit_collision;
81
82 /* detailed Token-Ring errors. See IBM Token-Ring Network
83 Architecture for more info */
84
85 unsigned long line_errors;
86 unsigned long internal_errors;
87 unsigned long burst_errors;
88 unsigned long A_C_errors;
89 unsigned long abort_delimiters;
90 unsigned long lost_frames;
91 unsigned long recv_congest_count;
92 unsigned long frame_copied_errors;
93 unsigned long frequency_errors;
94 unsigned long token_errors;
95 unsigned long dummy1;
96 };
97
98 /* source routing stuff */
99
100 #define TR_RII 0x80
101 #define TR_RCF_DIR_BIT 0x80
102 #define TR_RCF_LEN_MASK 0x1f00
103 #define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */
104 #define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
105 #define TR_RCF_FRAME2K 0x20
106 #define TR_RCF_BROADCAST_MASK 0xC000
107 #define TR_MAXRIFLEN 18
108
109 #endif /* _LINUX_IF_TR_H */
110
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