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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@lxorguk.ukuu.org.uk>

 *              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 <linux/types.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

        __be32          fixed;

#endif

        __be32          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)*/

        __be16  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 */