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/*
 * INET         An implementation of the TCP/IP protocol suite for the LINUX
 *              operating system.  INET is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              Global definitions for the HIPPI interface.
 *
 * Version:     @(#)if_hippi.h  1.0.0   05/26/97
 *
 * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *              Donald Becker, <becker@super.org>
 *              Alan Cox, <alan@redhat.com>
 *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
 *              Jes Sorensen, <Jes.Sorensen@cern.ch>
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 */

 
#ifndef _LINUX_IF_HIPPI_H
#define _LINUX_IF_HIPPI_H

#include <asm/byteorder.h>

/*
 *      HIPPI magic constants.
 */


#define HIPPI_ALEN      6               /* Bytes in one HIPPI hw-addr      */
#define HIPPI_HLEN      sizeof(struct hippi_hdr)
#define HIPPI_ZLEN      0               /* Min. bytes in frame without FCS */
#define HIPPI_DATA_LEN  65280           /* Max. bytes in payload           */
#define HIPPI_FRAME_LEN (HIPPI_DATA_LEN + HIPPI_HLEN)
                                        /* Max. bytes in frame without FCS */

/*
 * Define LLC and SNAP constants.
 */

#define HIPPI_EXTENDED_SAP      0xAA
#define HIPPI_UI_CMD            0x03


/*
 *      Do we need to list some sort of ID's here?
 */


/*
 *      HIPPI statistics collection data.
 */

 
struct hipnet_statistics
{
        int     rx_packets;             /* total packets received       */
        int     tx_packets;             /* total packets transmitted    */
        int     rx_errors;              /* bad packets received         */
        int     tx_errors;              /* packet transmit problems     */
        int     rx_dropped;             /* no space in linux buffers    */
        int     tx_dropped;             /* no space available in linux  */

        /* detailed rx_errors: */
        int     rx_length_errors;
        int     rx_over_errors;         /* receiver ring buff overflow  */
        int     rx_crc_errors;          /* recved pkt with crc error    */
        int     rx_frame_errors;        /* recv'd frame alignment error */
        int     rx_fifo_errors;         /* recv'r fifo overrun          */
        int     rx_missed_errors;       /* receiver missed packet       */

        /* detailed tx_errors */
        int     tx_aborted_errors;
        int     tx_carrier_errors;
        int     tx_fifo_errors;
        int     tx_heartbeat_errors;
        int     tx_window_errors;
};


struct hippi_fp_hdr
{
#if 0
        __u8            ulp;                            /* must contain 4 */
#if defined (__BIG_ENDIAN_BITFIELD)
        __u8            d1_data_present:1;              /* must be 1 */
        __u8            start_d2_burst_boundary:1;      /* must be zero */
        __u8            reserved:6;                     /* must be zero */
#if 0
        __u16           reserved1:5;
        __u16           d1_area_size:8;                 /* must be 3 */
        __u16           d2_offset:3;                    /* must be zero */
#endif
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8            reserved:6;                     /* must be zero */
        __u8            start_d2_burst_boundary:1;      /* must be zero */
        __u8            d1_data_present:1;              /* must be 1 */
#if 0
        __u16           d2_offset:3;                    /* must be zero */
        __u16           d1_area_size:8;                 /* must be 3 */
        __u16           reserved1:5;                    /* must be zero */
#endif
#else
#error  "Please fix <asm/byteorder.h>"
#endif
#else
        __u32           fixed;
#endif
        __u32           d2_size;
} __attribute__ ((packed));

struct hippi_le_hdr
{
#if defined (__BIG_ENDIAN_BITFIELD)
        __u8            fc:3;
        __u8            double_wide:1;
        __u8            message_type:4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8            message_type:4;
        __u8            double_wide:1;
        __u8            fc:3;
#endif
        __u8            dest_switch_addr[3];
#if defined (__BIG_ENDIAN_BITFIELD)
        __u8            dest_addr_type:4,
                        src_addr_type:4;
#elif defined(__LITTLE_ENDIAN_BITFIELD)
        __u8            src_addr_type:4,
                        dest_addr_type:4;
#endif
        __u8            src_switch_addr[3];
        __u16           reserved;
        __u8            daddr[HIPPI_ALEN];
        __u16           locally_administered;
        __u8            saddr[HIPPI_ALEN];
} __attribute__ ((packed));

#define HIPPI_OUI_LEN   3
/*
 * Looks like the dsap and ssap fields have been swapped by mistake in
 * RFC 2067 "IP over HIPPI".
 */

struct hippi_snap_hdr
{
        __u8    dsap;                   /* always 0xAA */
        __u8    ssap;                   /* always 0xAA */
        __u8    ctrl;                   /* always 0x03 */
        __u8    oui[HIPPI_OUI_LEN];     /* organizational universal id (zero)*/
        __u16   ethertype;              /* packet type ID field */
} __attribute__ ((packed));

struct hippi_hdr
{
        struct hippi_fp_hdr     fp;
        struct hippi_le_hdr     le;
        struct hippi_snap_hdr   snap;
} __attribute__ ((packed));

#endif  /* _LINUX_IF_HIPPI_H */