/*
* 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 */