1/*
2 * INET		An implementation of the TCP/IP protocol suite for the LINUX
3 *		operating system.  INET is implemented using the  BSD Socket
4 *		interface as the means of communication with the user level.
5 *
6 *		Global definitions for the HIPPI interface.
7 *
8 * Version:	@(#)if_hippi.h	1.0.0	05/26/97
9 *
10 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *		Donald Becker, <becker@super.org>
12 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
13 *		Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
14 *		Jes Sorensen, <Jes.Sorensen@cern.ch>
15 *
16 *		This program is free software; you can redistribute it and/or
17 *		modify it under the terms of the GNU General Public License
18 *		as published by the Free Software Foundation; either version
19 *		2 of the License, or (at your option) any later version.
20 */
21
22#ifndef _LINUX_IF_HIPPI_H
23#define _LINUX_IF_HIPPI_H
24
25#include <linux/types.h>
26#include <asm/byteorder.h>
27
28/*
29 *	HIPPI magic constants.
30 */
31
32#define HIPPI_ALEN	6		/* Bytes in one HIPPI hw-addr	   */
33#define HIPPI_HLEN	sizeof(struct hippi_hdr)
34#define HIPPI_ZLEN	0		/* Min. bytes in frame without FCS */
35#define HIPPI_DATA_LEN	65280		/* Max. bytes in payload	   */
36#define HIPPI_FRAME_LEN	(HIPPI_DATA_LEN + HIPPI_HLEN)
37					/* Max. bytes in frame without FCS */
38
39/*
40 * Define LLC and SNAP constants.
41 */
42#define HIPPI_EXTENDED_SAP	0xAA
43#define HIPPI_UI_CMD		0x03
44
45
46/*
47 *	Do we need to list some sort of ID's here?
48 */
49
50/*
51 *	HIPPI statistics collection data.
52 */
53
54struct hipnet_statistics {
55	int	rx_packets;		/* total packets received	*/
56	int	tx_packets;		/* total packets transmitted	*/
57	int	rx_errors;		/* bad packets received		*/
58	int	tx_errors;		/* packet transmit problems	*/
59	int	rx_dropped;		/* no space in linux buffers	*/
60	int	tx_dropped;		/* no space available in linux	*/
61
62	/* detailed rx_errors: */
63	int	rx_length_errors;
64	int	rx_over_errors;		/* receiver ring buff overflow	*/
65	int	rx_crc_errors;		/* recved pkt with crc error	*/
66	int	rx_frame_errors;	/* recv'd frame alignment error */
67	int	rx_fifo_errors;		/* recv'r fifo overrun		*/
68	int	rx_missed_errors;	/* receiver missed packet	*/
69
70	/* detailed tx_errors */
71	int	tx_aborted_errors;
72	int	tx_carrier_errors;
73	int	tx_fifo_errors;
74	int	tx_heartbeat_errors;
75	int	tx_window_errors;
76};
77
78
79struct hippi_fp_hdr {
80#if 0
81	__u8		ulp;				/* must contain 4 */
82#if defined (__BIG_ENDIAN_BITFIELD)
83	__u8		d1_data_present:1;		/* must be 1 */
84	__u8		start_d2_burst_boundary:1;	/* must be zero */
85	__u8		reserved:6;			/* must be zero */
86#if 0
87	__u16		reserved1:5;
88	__u16		d1_area_size:8;			/* must be 3 */
89	__u16		d2_offset:3;			/* must be zero */
90#endif
91#elif defined(__LITTLE_ENDIAN_BITFIELD)
92	__u8		reserved:6;			/* must be zero */
93	__u8	 	start_d2_burst_boundary:1;	/* must be zero */
94	__u8		d1_data_present:1;		/* must be 1 */
95#if 0
96	__u16		d2_offset:3;			/* must be zero */
97	__u16		d1_area_size:8;			/* must be 3 */
98	__u16		reserved1:5;			/* must be zero */
99#endif
100#else
101#error	"Please fix <asm/byteorder.h>"
102#endif
103#else
104	__be32		fixed;
105#endif
106	__be32		d2_size;
107} __attribute__((packed));
108
109struct hippi_le_hdr {
110#if defined (__BIG_ENDIAN_BITFIELD)
111	__u8		fc:3;
112	__u8		double_wide:1;
113	__u8		message_type:4;
114#elif defined(__LITTLE_ENDIAN_BITFIELD)
115	__u8		message_type:4;
116	__u8		double_wide:1;
117	__u8		fc:3;
118#endif
119	__u8		dest_switch_addr[3];
120#if defined (__BIG_ENDIAN_BITFIELD)
121	__u8		dest_addr_type:4,
122			src_addr_type:4;
123#elif defined(__LITTLE_ENDIAN_BITFIELD)
124	__u8		src_addr_type:4,
125			dest_addr_type:4;
126#endif
127	__u8		src_switch_addr[3];
128	__u16		reserved;
129	__u8		daddr[HIPPI_ALEN];
130	__u16		locally_administered;
131	__u8		saddr[HIPPI_ALEN];
132} __attribute__((packed));
133
134#define HIPPI_OUI_LEN	3
135/*
136 * Looks like the dsap and ssap fields have been swapped by mistake in
137 * RFC 2067 "IP over HIPPI".
138 */
139struct hippi_snap_hdr {
140	__u8	dsap;			/* always 0xAA */
141	__u8	ssap;			/* always 0xAA */
142	__u8	ctrl;			/* always 0x03 */
143	__u8	oui[HIPPI_OUI_LEN];	/* organizational universal id (zero)*/
144	__be16	ethertype;		/* packet type ID field */
145} __attribute__((packed));
146
147struct hippi_hdr {
148	struct hippi_fp_hdr	fp;
149	struct hippi_le_hdr	le;
150	struct hippi_snap_hdr	snap;
151} __attribute__((packed));
152
153#endif	/* _LINUX_IF_HIPPI_H */
154