include/linux/if_tr.h

   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 */