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 ARCnet interface.
7 *
8 * Authors: David Woodhouse and Avery Pennarun
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16 #ifndef _LINUX_IF_ARCNET_H
17 #define _LINUX_IF_ARCNET_H
18
19 #include <linux/if_ether.h>
20
21
22 /*
23 * These are the defined ARCnet Protocol ID's.
24 */
25
26 /* RFC1201 Protocol ID's */
27 #define ARC_P_IP 212 /* 0xD4 */
28 #define ARC_P_ARP 213 /* 0xD5 */
29 #define ARC_P_RARP 214 /* 0xD6 */
30 #define ARC_P_IPX 250 /* 0xFA */
31 #define ARC_P_NOVELL_EC 236 /* 0xEC */
32
33 /* Old RFC1051 Protocol ID's */
34 #define ARC_P_IP_RFC1051 240 /* 0xF0 */
35 #define ARC_P_ARP_RFC1051 241 /* 0xF1 */
36
37 /* MS LanMan/WfWg "NDIS" encapsulation */
38 #define ARC_P_ETHER 232 /* 0xE8 */
39
40 /* Unsupported/indirectly supported protocols */
41 #define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */
42 #define ARC_P_DATAPOINT_MOUNT 1
43 #define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */
44 #define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */
45 #define ARC_P_LANSOFT 251 /* 0xFB - what is this? */
46 #define ARC_P_ATALK 0xDD
47
48 /*
49 * The RFC1201-specific components of an arcnet packet header.
50 */
51 struct arc_rfc1201
52 {
53 uint8_t proto; /* protocol ID field - varies */
54 uint8_t split_flag; /* for use with split packets */
55 uint16_t sequence; /* sequence number */
56 uint8_t payload[0]; /* space remaining in packet (504 bytes)*/
57 };
58 #define RFC1201_HDR_SIZE 4
59
60
61 /*
62 * The RFC1051-specific components.
63 */
64 struct arc_rfc1051
65 {
66 uint8_t proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */
67 uint8_t payload[0]; /* 507 bytes */
68 };
69 #define RFC1051_HDR_SIZE 1
70
71
72 /*
73 * The ethernet-encap-specific components. We have a real ethernet header
74 * and some data.
75 */
76 struct arc_eth_encap
77 {
78 uint8_t proto; /* Always ARC_P_ETHER */
79 struct ethhdr eth; /* standard ethernet header (yuck!) */
80 uint8_t payload[0]; /* 493 bytes */
81 };
82 #define ETH_ENCAP_HDR_SIZE 14
83
84
85 /*
86 * The data needed by the actual arcnet hardware.
87 *
88 * Now, in the real arcnet hardware, the third and fourth bytes are the
89 * 'offset' specification instead of the length, and the soft data is at
90 * the _end_ of the 512-byte buffer. We hide this complexity inside the
91 * driver.
92 */
93 struct arc_hardware
94 {
95 uint8_t source, /* source ARCnet - filled in automagically */
96 dest, /* destination ARCnet - 0 for broadcast */
97 offset[2]; /* offset bytes (some weird semantics) */
98 };
99 #define ARC_HDR_SIZE 4
100
101 /*
102 * This is an ARCnet frame header, as seen by the kernel (and userspace,
103 * when you do a raw packet capture).
104 */
105 struct archdr
106 {
107 /* hardware requirements */
108 struct arc_hardware hard;
109
110 /* arcnet encapsulation-specific bits */
111 union {
112 struct arc_rfc1201 rfc1201;
113 struct arc_rfc1051 rfc1051;
114 struct arc_eth_encap eth_encap;
115 uint8_t raw[0]; /* 508 bytes */
116 } soft;
117 };
118
119 #endif /* _LINUX_IF_ARCNET_H */
120
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.