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1da177e4 LT |
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 | /* CAP mode */ | |
27 | /* No macro but uses 1-8 */ | |
28 | ||
29 | /* RFC1201 Protocol ID's */ | |
30 | #define ARC_P_IP 212 /* 0xD4 */ | |
31 | #define ARC_P_IPV6 196 /* 0xC4: RFC2497 */ | |
32 | #define ARC_P_ARP 213 /* 0xD5 */ | |
33 | #define ARC_P_RARP 214 /* 0xD6 */ | |
34 | #define ARC_P_IPX 250 /* 0xFA */ | |
35 | #define ARC_P_NOVELL_EC 236 /* 0xEC */ | |
36 | ||
37 | /* Old RFC1051 Protocol ID's */ | |
38 | #define ARC_P_IP_RFC1051 240 /* 0xF0 */ | |
39 | #define ARC_P_ARP_RFC1051 241 /* 0xF1 */ | |
40 | ||
41 | /* MS LanMan/WfWg "NDIS" encapsulation */ | |
42 | #define ARC_P_ETHER 232 /* 0xE8 */ | |
43 | ||
44 | /* Unsupported/indirectly supported protocols */ | |
45 | #define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */ | |
46 | #define ARC_P_DATAPOINT_MOUNT 1 | |
47 | #define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */ | |
48 | #define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */ | |
49 | #define ARC_P_LANSOFT 251 /* 0xFB - what is this? */ | |
50 | #define ARC_P_ATALK 0xDD | |
51 | ||
52 | /* Hardware address length */ | |
53 | #define ARCNET_ALEN 1 | |
54 | ||
55 | /* | |
56 | * The RFC1201-specific components of an arcnet packet header. | |
57 | */ | |
58 | struct arc_rfc1201 | |
59 | { | |
60 | uint8_t proto; /* protocol ID field - varies */ | |
61 | uint8_t split_flag; /* for use with split packets */ | |
701181ac | 62 | __be16 sequence; /* sequence number */ |
1da177e4 LT |
63 | uint8_t payload[0]; /* space remaining in packet (504 bytes)*/ |
64 | }; | |
65 | #define RFC1201_HDR_SIZE 4 | |
66 | ||
67 | ||
68 | /* | |
69 | * The RFC1051-specific components. | |
70 | */ | |
71 | struct arc_rfc1051 | |
72 | { | |
73 | uint8_t proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */ | |
74 | uint8_t payload[0]; /* 507 bytes */ | |
75 | }; | |
76 | #define RFC1051_HDR_SIZE 1 | |
77 | ||
78 | ||
79 | /* | |
80 | * The ethernet-encap-specific components. We have a real ethernet header | |
81 | * and some data. | |
82 | */ | |
83 | struct arc_eth_encap | |
84 | { | |
85 | uint8_t proto; /* Always ARC_P_ETHER */ | |
86 | struct ethhdr eth; /* standard ethernet header (yuck!) */ | |
87 | uint8_t payload[0]; /* 493 bytes */ | |
88 | }; | |
89 | #define ETH_ENCAP_HDR_SIZE 14 | |
90 | ||
91 | ||
92 | struct arc_cap | |
93 | { | |
94 | uint8_t proto; | |
95 | uint8_t cookie[sizeof(int)]; /* Actually NOT sent over the network */ | |
96 | union { | |
97 | uint8_t ack; | |
98 | uint8_t raw[0]; /* 507 bytes */ | |
99 | } mes; | |
100 | }; | |
101 | ||
102 | /* | |
103 | * The data needed by the actual arcnet hardware. | |
104 | * | |
105 | * Now, in the real arcnet hardware, the third and fourth bytes are the | |
106 | * 'offset' specification instead of the length, and the soft data is at | |
107 | * the _end_ of the 512-byte buffer. We hide this complexity inside the | |
108 | * driver. | |
109 | */ | |
110 | struct arc_hardware | |
111 | { | |
112 | uint8_t source, /* source ARCnet - filled in automagically */ | |
113 | dest, /* destination ARCnet - 0 for broadcast */ | |
114 | offset[2]; /* offset bytes (some weird semantics) */ | |
115 | }; | |
116 | #define ARC_HDR_SIZE 4 | |
117 | ||
118 | /* | |
119 | * This is an ARCnet frame header, as seen by the kernel (and userspace, | |
120 | * when you do a raw packet capture). | |
121 | */ | |
122 | struct archdr | |
123 | { | |
124 | /* hardware requirements */ | |
125 | struct arc_hardware hard; | |
126 | ||
127 | /* arcnet encapsulation-specific bits */ | |
128 | union { | |
129 | struct arc_rfc1201 rfc1201; | |
130 | struct arc_rfc1051 rfc1051; | |
131 | struct arc_eth_encap eth_encap; | |
132 | struct arc_cap cap; | |
133 | uint8_t raw[0]; /* 508 bytes */ | |
134 | } soft; | |
135 | }; | |
136 | ||
137 | #endif /* _LINUX_IF_ARCNET_H */ |