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422 giacomo 1
/*
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 * INET         An implementation of the TCP/IP protocol suite for the LINUX
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 *              operating system.  INET is implemented using the  BSD Socket
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 *              interface as the means of communication with the user level.
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 *
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 *              Global definitions for the HIPPI interface.
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 *
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 * Version:     @(#)if_hippi.h  1.0.0   05/26/97
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 *
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 * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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 *              Donald Becker, <becker@super.org>
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 *              Alan Cox, <alan@redhat.com>
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 *              Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
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 *              Jes Sorensen, <Jes.Sorensen@cern.ch>
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 *
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 *              This program is free software; you can redistribute it and/or
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 *              modify it under the terms of the GNU General Public License
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 *              as published by the Free Software Foundation; either version
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 *              2 of the License, or (at your option) any later version.
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 */
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#ifndef _LINUX_IF_HIPPI_H
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#define _LINUX_IF_HIPPI_H
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#include <asm/byteorder.h>
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/*
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 *      HIPPI magic constants.
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 */
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#define HIPPI_ALEN      6               /* Bytes in one HIPPI hw-addr      */
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#define HIPPI_HLEN      sizeof(struct hippi_hdr)
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#define HIPPI_ZLEN      0               /* Min. bytes in frame without FCS */
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#define HIPPI_DATA_LEN  65280           /* Max. bytes in payload           */
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#define HIPPI_FRAME_LEN (HIPPI_DATA_LEN + HIPPI_HLEN)
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                                        /* Max. bytes in frame without FCS */
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/*
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 * Define LLC and SNAP constants.
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 */
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#define HIPPI_EXTENDED_SAP      0xAA
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#define HIPPI_UI_CMD            0x03
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/*
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 *      Do we need to list some sort of ID's here?
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 */
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/*
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 *      HIPPI statistics collection data.
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 */
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struct hipnet_statistics
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{
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        int     rx_packets;             /* total packets received       */
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        int     tx_packets;             /* total packets transmitted    */
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        int     rx_errors;              /* bad packets received         */
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        int     tx_errors;              /* packet transmit problems     */
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        int     rx_dropped;             /* no space in linux buffers    */
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        int     tx_dropped;             /* no space available in linux  */
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        /* detailed rx_errors: */
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        int     rx_length_errors;
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        int     rx_over_errors;         /* receiver ring buff overflow  */
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        int     rx_crc_errors;          /* recved pkt with crc error    */
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        int     rx_frame_errors;        /* recv'd frame alignment error */
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        int     rx_fifo_errors;         /* recv'r fifo overrun          */
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        int     rx_missed_errors;       /* receiver missed packet       */
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        /* detailed tx_errors */
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        int     tx_aborted_errors;
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        int     tx_carrier_errors;
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        int     tx_fifo_errors;
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        int     tx_heartbeat_errors;
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        int     tx_window_errors;
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};
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struct hippi_fp_hdr
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{
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#if 0
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        __u8            ulp;                            /* must contain 4 */
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#if defined (__BIG_ENDIAN_BITFIELD)
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        __u8            d1_data_present:1;              /* must be 1 */
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        __u8            start_d2_burst_boundary:1;      /* must be zero */
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        __u8            reserved:6;                     /* must be zero */
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#if 0
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        __u16           reserved1:5;
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        __u16           d1_area_size:8;                 /* must be 3 */
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        __u16           d2_offset:3;                    /* must be zero */
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#endif
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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        __u8            reserved:6;                     /* must be zero */
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        __u8            start_d2_burst_boundary:1;      /* must be zero */
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        __u8            d1_data_present:1;              /* must be 1 */
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#if 0
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        __u16           d2_offset:3;                    /* must be zero */
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        __u16           d1_area_size:8;                 /* must be 3 */
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        __u16           reserved1:5;                    /* must be zero */
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#endif
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#else
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#error  "Please fix <asm/byteorder.h>"
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#endif
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#else
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        __u32           fixed;
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#endif
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        __u32           d2_size;
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} __attribute__ ((packed));
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struct hippi_le_hdr
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{
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#if defined (__BIG_ENDIAN_BITFIELD)
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        __u8            fc:3;
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        __u8            double_wide:1;
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        __u8            message_type:4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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        __u8            message_type:4;
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        __u8            double_wide:1;
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        __u8            fc:3;
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#endif
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        __u8            dest_switch_addr[3];
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#if defined (__BIG_ENDIAN_BITFIELD)
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        __u8            dest_addr_type:4,
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                        src_addr_type:4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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        __u8            src_addr_type:4,
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                        dest_addr_type:4;
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#endif
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        __u8            src_switch_addr[3];
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        __u16           reserved;
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        __u8            daddr[HIPPI_ALEN];
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        __u16           locally_administered;
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        __u8            saddr[HIPPI_ALEN];
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} __attribute__ ((packed));
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#define HIPPI_OUI_LEN   3
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/*
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 * Looks like the dsap and ssap fields have been swapped by mistake in
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 * RFC 2067 "IP over HIPPI".
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 */
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struct hippi_snap_hdr
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{
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        __u8    dsap;                   /* always 0xAA */
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        __u8    ssap;                   /* always 0xAA */
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        __u8    ctrl;                   /* always 0x03 */
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        __u8    oui[HIPPI_OUI_LEN];     /* organizational universal id (zero)*/
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        __u16   ethertype;              /* packet type ID field */
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} __attribute__ ((packed));
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struct hippi_hdr
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{
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        struct hippi_fp_hdr     fp;
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        struct hippi_le_hdr     le;
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        struct hippi_snap_hdr   snap;
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} __attribute__ ((packed));
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#endif  /* _LINUX_IF_HIPPI_H */