1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * INET		An implementation of the TCP/IP protocol suite for the LINUX
4 *		operating system.  INET is implemented using the  BSD Socket
5 *		interface as the means of communication with the user level.
6 *
7 *		Global definitions for the HIPPI interface.
8 *
9 * Version:	@(#)if_hippi.h	1.0.0	05/26/97
10 *
11 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *		Donald Becker, <becker@super.org>
13 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
14 *		Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
15 *		Jes Sorensen, <Jes.Sorensen@cern.ch>
16 *
17 *		This program is free software; you can redistribute it and/or
18 *		modify it under the terms of the GNU General Public License
19 *		as published by the Free Software Foundation; either version
20 *		2 of the License, or (at your option) any later version.
21 */
22
23#ifndef _LINUX_IF_HIPPI_H
24#define _LINUX_IF_HIPPI_H
25
26#include <linux/types.h>
27#include <asm/byteorder.h>
28
29/*
30 *	HIPPI magic constants.
31 */
32
33#define HIPPI_ALEN	6		/* Bytes in one HIPPI hw-addr	   */
34#define HIPPI_HLEN	sizeof(struct hippi_hdr)
35#define HIPPI_ZLEN	0		/* Min. bytes in frame without FCS */
36#define HIPPI_DATA_LEN	65280		/* Max. bytes in payload	   */
37#define HIPPI_FRAME_LEN	(HIPPI_DATA_LEN + HIPPI_HLEN)
38					/* Max. bytes in frame without FCS */
39
40/*
41 * Define LLC and SNAP constants.
42 */
43#define HIPPI_EXTENDED_SAP	0xAA
44#define HIPPI_UI_CMD		0x03
45
46
47/*
48 *	Do we need to list some sort of ID's here?
49 */
50
51/*
52 *	HIPPI statistics collection data.
53 */
54
55struct hipnet_statistics {
56	int	rx_packets;		/* total packets received	*/
57	int	tx_packets;		/* total packets transmitted	*/
58	int	rx_errors;		/* bad packets received		*/
59	int	tx_errors;		/* packet transmit problems	*/
60	int	rx_dropped;		/* no space in linux buffers	*/
61	int	tx_dropped;		/* no space available in linux	*/
62
63	/* detailed rx_errors: */
64	int	rx_length_errors;
65	int	rx_over_errors;		/* receiver ring buff overflow	*/
66	int	rx_crc_errors;		/* recved pkt with crc error	*/
67	int	rx_frame_errors;	/* recv'd frame alignment error */
68	int	rx_fifo_errors;		/* recv'r fifo overrun		*/
69	int	rx_missed_errors;	/* receiver missed packet	*/
70
71	/* detailed tx_errors */
72	int	tx_aborted_errors;
73	int	tx_carrier_errors;
74	int	tx_fifo_errors;
75	int	tx_heartbeat_errors;
76	int	tx_window_errors;
77};
78
79
80struct hippi_fp_hdr {
81#if 0
82	__u8		ulp;				/* must contain 4 */
83#if defined (__BIG_ENDIAN_BITFIELD)
84	__u8		d1_data_present:1;		/* must be 1 */
85	__u8		start_d2_burst_boundary:1;	/* must be zero */
86	__u8		reserved:6;			/* must be zero */
87#if 0
88	__u16		reserved1:5;
89	__u16		d1_area_size:8;			/* must be 3 */
90	__u16		d2_offset:3;			/* must be zero */
91#endif
92#elif defined(__LITTLE_ENDIAN_BITFIELD)
93	__u8		reserved:6;			/* must be zero */
94	__u8	 	start_d2_burst_boundary:1;	/* must be zero */
95	__u8		d1_data_present:1;		/* must be 1 */
96#if 0
97	__u16		d2_offset:3;			/* must be zero */
98	__u16		d1_area_size:8;			/* must be 3 */
99	__u16		reserved1:5;			/* must be zero */
100#endif
101#else
102#error	"Please fix <asm/byteorder.h>"
103#endif
104#else
105	__be32		fixed;
106#endif
107	__be32		d2_size;
108} __attribute__((packed));
109
110struct hippi_le_hdr {
111#if defined (__BIG_ENDIAN_BITFIELD)
112	__u8		fc:3;
113	__u8		double_wide:1;
114	__u8		message_type:4;
115#elif defined(__LITTLE_ENDIAN_BITFIELD)
116	__u8		message_type:4;
117	__u8		double_wide:1;
118	__u8		fc:3;
119#endif
120	__u8		dest_switch_addr[3];
121#if defined (__BIG_ENDIAN_BITFIELD)
122	__u8		dest_addr_type:4,
123			src_addr_type:4;
124#elif defined(__LITTLE_ENDIAN_BITFIELD)
125	__u8		src_addr_type:4,
126			dest_addr_type:4;
127#endif
128	__u8		src_switch_addr[3];
129	__u16		reserved;
130	__u8		daddr[HIPPI_ALEN];
131	__u16		locally_administered;
132	__u8		saddr[HIPPI_ALEN];
133} __attribute__((packed));
134
135#define HIPPI_OUI_LEN	3
136/*
137 * Looks like the dsap and ssap fields have been swapped by mistake in
138 * RFC 2067 "IP over HIPPI".
139 */
140struct hippi_snap_hdr {
141	__u8	dsap;			/* always 0xAA */
142	__u8	ssap;			/* always 0xAA */
143	__u8	ctrl;			/* always 0x03 */
144	__u8	oui[HIPPI_OUI_LEN];	/* organizational universal id (zero)*/
145	__be16	ethertype;		/* packet type ID field */
146} __attribute__((packed));
147
148struct hippi_hdr {
149	struct hippi_fp_hdr	fp;
150	struct hippi_le_hdr	le;
151	struct hippi_snap_hdr	snap;
152} __attribute__((packed));
153
154#endif	/* _LINUX_IF_HIPPI_H */
155