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 #include <linux/types.h>
  23 #include <asm/byteorder.h>      /* For __be16 */
  24
  25 /* IEEE 802.5 Token-Ring magic constants.  The frame sizes omit the preamble
  26    and FCS/CRC (frame check sequence). */
  27 #define TR_ALEN         6               /* Octets in one token-ring addr */
  28 #define TR_HLEN         (sizeof(struct trh_hdr)+sizeof(struct trllc))
  29 #define AC              0x10
  30 #define LLC_FRAME       0x40
  31
  32 /* LLC and SNAP constants */
  33 #define EXTENDED_SAP    0xAA
  34 #define UI_CMD          0x03
  35
  36 /* This is an Token-Ring frame header. */
  37 struct trh_hdr {
  38         __u8  ac;                       /* access control field */
  39         __u8  fc;                       /* frame control field */
  40         __u8  daddr[TR_ALEN];           /* destination address */
  41         __u8  saddr[TR_ALEN];           /* source address */
  42         __be16 rcf;                     /* route control field */
  43         __be16 rseg[8];                 /* routing registers */
  44 };
  45
  46 #ifdef __KERNEL__
  47 #include <linux/skbuff.h>
  48
  49 static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb)
  50 {
  51         return (struct trh_hdr *)skb_mac_header(skb);
  52 }
  53 #endif
  54
  55 /* This is an Token-Ring LLC structure */
  56 struct trllc {
  57         __u8  dsap;                     /* destination SAP */
  58         __u8  ssap;                     /* source SAP */
  59         __u8  llc;                      /* LLC control field */
  60         __u8  protid[3];                /* protocol id */
  61         __be16 ethertype;               /* ether type field */
  62 };
  63
  64 /* Token-Ring statistics collection data. */
  65 struct tr_statistics {
  66         unsigned long rx_packets;       /* total packets received       */
  67         unsigned long tx_packets;       /* total packets transmitted    */
  68         unsigned long rx_bytes;         /* total bytes received         */
  69         unsigned long tx_bytes;         /* total bytes transmitted      */
  70         unsigned long rx_errors;        /* bad packets received         */
  71         unsigned long tx_errors;        /* packet transmit problems     */
  72         unsigned long rx_dropped;       /* no space in linux buffers    */
  73         unsigned long tx_dropped;       /* no space available in linux  */
  74         unsigned long multicast;        /* multicast packets received   */
  75         unsigned long transmit_collision;
  76
  77         /* detailed Token-Ring errors. See IBM Token-Ring Network
  78            Architecture for more info */
  79
  80         unsigned long line_errors;
  81         unsigned long internal_errors;
  82         unsigned long burst_errors;
  83         unsigned long A_C_errors;
  84         unsigned long abort_delimiters;
  85         unsigned long lost_frames;
  86         unsigned long recv_congest_count;
  87         unsigned long frame_copied_errors;
  88         unsigned long frequency_errors;
  89         unsigned long token_errors;
  90         unsigned long dummy1;
  91 };
  92
  93 /* source routing stuff */
  94 #define TR_RII                  0x80
  95 #define TR_RCF_DIR_BIT          0x80
  96 #define TR_RCF_LEN_MASK         0x1f00
  97 #define TR_RCF_BROADCAST        0x8000  /* all-routes broadcast */
  98 #define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
  99 #define TR_RCF_FRAME2K          0x20
 100 #define TR_RCF_BROADCAST_MASK   0xC000
 101 #define TR_MAXRIFLEN            18
 102
 103 #endif  /* _LINUX_IF_TR_H */