text: /*
   * 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 */
  