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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 */