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 
55 struct 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 
80 struct 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 
110 struct 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  */
140 struct 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 
148 struct 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