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if_hippi.h
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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 
54 struct 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 
79 struct 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 
109 struct 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  */
139 struct 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 
147 struct 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 */
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