include/linux/if_hippi.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 HIPPI interface.
   7  *
   8  * Version:     @(#)if_hippi.h  1.0.0   05/26/97
   9  *
  10  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  11  *              Donald Becker, <becker@super.org>
  12  *              Alan Cox, <alan@lxorguk.ukuu.org.uk>
  13  *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
  14  *              Jes Sorensen, <Jes.Sorensen@cern.ch>
  15  *
  16  *              This program is free software; you can redistribute it and/or
  17  *              modify it under the terms of the GNU General Public License
  18  *              as published by the Free Software Foundation; either version
  19  *              2 of the License, or (at your option) any later version.
  20  */
  21
  22 #ifndef _LINUX_IF_HIPPI_H
  23 #define _LINUX_IF_HIPPI_H
  24
  25 #include <linux/types.h>
  26 #include <asm/byteorder.h>
  27
  28 /*
  29  *      HIPPI magic constants.
  30  */
  31
  32 #define HIPPI_ALEN      6               /* Bytes in one HIPPI hw-addr      */
  33 #define HIPPI_HLEN      sizeof(struct hippi_hdr)
  34 #define HIPPI_ZLEN      0               /* Min. bytes in frame without FCS */
  35 #define HIPPI_DATA_LEN  65280           /* Max. bytes in payload           */
  36 #define HIPPI_FRAME_LEN (HIPPI_DATA_LEN + HIPPI_HLEN)
  37                                         /* Max. bytes in frame without FCS */
  38
  39 /*
  40  * Define LLC and SNAP constants.
  41  */
  42 #define HIPPI_EXTENDED_SAP      0xAA
  43 #define HIPPI_UI_CMD            0x03
  44
  45
  46 /*
  47  *      Do we need to list some sort of ID's here?
  48  */
  49
  50 /*
  51  *      HIPPI statistics collection data.
  52  */
  53
  54 struct hipnet_statistics {
  55         int     rx_packets;             /* total packets received       */
  56         int     tx_packets;             /* total packets transmitted    */
  57         int     rx_errors;              /* bad packets received         */
  58         int     tx_errors;              /* packet transmit problems     */
  59         int     rx_dropped;             /* no space in linux buffers    */
  60         int     tx_dropped;             /* no space available in linux  */
  61
  62         /* detailed rx_errors: */
  63         int     rx_length_errors;
  64         int     rx_over_errors;         /* receiver ring buff overflow  */
  65         int     rx_crc_errors;          /* recved pkt with crc error    */
  66         int     rx_frame_errors;        /* recv'd frame alignment error */
  67         int     rx_fifo_errors;         /* recv'r fifo overrun          */
  68         int     rx_missed_errors;       /* receiver missed packet       */
  69
  70         /* detailed tx_errors */
  71         int     tx_aborted_errors;
  72         int     tx_carrier_errors;
  73         int     tx_fifo_errors;
  74         int     tx_heartbeat_errors;
  75         int     tx_window_errors;
  76 };
  77
  78
  79 struct hippi_fp_hdr {
  80 #if 0
  81         __u8            ulp;                            /* must contain 4 */
  82 #if defined (__BIG_ENDIAN_BITFIELD)
  83         __u8            d1_data_present:1;              /* must be 1 */
  84         __u8            start_d2_burst_boundary:1;      /* must be zero */
  85         __u8            reserved:6;                     /* must be zero */
  86 #if 0
  87         __u16           reserved1:5;
  88         __u16           d1_area_size:8;                 /* must be 3 */
  89         __u16           d2_offset:3;                    /* must be zero */
  90 #endif
  91 #elif defined(__LITTLE_ENDIAN_BITFIELD)
  92         __u8            reserved:6;                     /* must be zero */
  93         __u8            start_d2_burst_boundary:1;      /* must be zero */
  94         __u8            d1_data_present:1;              /* must be 1 */
  95 #if 0
  96         __u16           d2_offset:3;                    /* must be zero */
  97         __u16           d1_area_size:8;                 /* must be 3 */
  98         __u16           reserved1:5;                    /* must be zero */
  99 #endif
 100 #else
 101 #error  "Please fix <asm/byteorder.h>"
 102 #endif
 103 #else
 104         __be32          fixed;
 105 #endif
 106         __be32          d2_size;
 107 } __packed;
 108
 109 struct hippi_le_hdr {
 110 #if defined (__BIG_ENDIAN_BITFIELD)
 111         __u8            fc:3;
 112         __u8            double_wide:1;
 113         __u8            message_type:4;
 114 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 115         __u8            message_type:4;
 116         __u8            double_wide:1;
 117         __u8            fc:3;
 118 #endif
 119         __u8            dest_switch_addr[3];
 120 #if defined (__BIG_ENDIAN_BITFIELD)
 121         __u8            dest_addr_type:4,
 122                         src_addr_type:4;
 123 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 124         __u8            src_addr_type:4,
 125                         dest_addr_type:4;
 126 #endif
 127         __u8            src_switch_addr[3];
 128         __u16           reserved;
 129         __u8            daddr[HIPPI_ALEN];
 130         __u16           locally_administered;
 131         __u8            saddr[HIPPI_ALEN];
 132 } __packed;
 133
 134 #define HIPPI_OUI_LEN   3
 135 /*
 136  * Looks like the dsap and ssap fields have been swapped by mistake in
 137  * RFC 2067 "IP over HIPPI".
 138  */
 139 struct hippi_snap_hdr {
 140         __u8    dsap;                   /* always 0xAA */
 141         __u8    ssap;                   /* always 0xAA */
 142         __u8    ctrl;                   /* always 0x03 */
 143         __u8    oui[HIPPI_OUI_LEN];     /* organizational universal id (zero)*/
 144         __be16  ethertype;              /* packet type ID field */
 145 } __packed;
 146
 147 struct hippi_hdr {
 148         struct hippi_fp_hdr     fp;
 149         struct hippi_le_hdr     le;
 150         struct hippi_snap_hdr   snap;
 151 } __packed;
 152
 153 #endif  /* _LINUX_IF_HIPPI_H */