if_hippi.h

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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, <[email protected]>
 *      Donald Becker, <[email protected]>
 *      Alan Cox, <[email protected]>
 *      Steve Whitehouse, <[email protected]>
 *      Jes Sorensen, <[email protected]>
 *
 *      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 */