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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 | ||
9adfbfb6 | 19 | #include <linux/types.h> |
1da177e4 LT |
20 | #include <linux/if_ether.h> |
21 | ||
22 | ||
23 | /* | |
24 | * These are the defined ARCnet Protocol ID's. | |
25 | */ | |
26 | ||
27 | /* CAP mode */ | |
28 | /* No macro but uses 1-8 */ | |
29 | ||
30 | /* RFC1201 Protocol ID's */ | |
31 | #define ARC_P_IP 212 /* 0xD4 */ | |
32 | #define ARC_P_IPV6 196 /* 0xC4: RFC2497 */ | |
33 | #define ARC_P_ARP 213 /* 0xD5 */ | |
34 | #define ARC_P_RARP 214 /* 0xD6 */ | |
35 | #define ARC_P_IPX 250 /* 0xFA */ | |
36 | #define ARC_P_NOVELL_EC 236 /* 0xEC */ | |
37 | ||
38 | /* Old RFC1051 Protocol ID's */ | |
39 | #define ARC_P_IP_RFC1051 240 /* 0xF0 */ | |
40 | #define ARC_P_ARP_RFC1051 241 /* 0xF1 */ | |
41 | ||
42 | /* MS LanMan/WfWg "NDIS" encapsulation */ | |
43 | #define ARC_P_ETHER 232 /* 0xE8 */ | |
44 | ||
45 | /* Unsupported/indirectly supported protocols */ | |
46 | #define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */ | |
47 | #define ARC_P_DATAPOINT_MOUNT 1 | |
48 | #define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */ | |
49 | #define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */ | |
50 | #define ARC_P_LANSOFT 251 /* 0xFB - what is this? */ | |
51 | #define ARC_P_ATALK 0xDD | |
52 | ||
53 | /* Hardware address length */ | |
54 | #define ARCNET_ALEN 1 | |
55 | ||
56 | /* | |
57 | * The RFC1201-specific components of an arcnet packet header. | |
58 | */ | |
d94d9fee | 59 | struct arc_rfc1201 { |
9adfbfb6 AB |
60 | __u8 proto; /* protocol ID field - varies */ |
61 | __u8 split_flag; /* for use with split packets */ | |
701181ac | 62 | __be16 sequence; /* sequence number */ |
9adfbfb6 | 63 | __u8 payload[0]; /* space remaining in packet (504 bytes)*/ |
1da177e4 LT |
64 | }; |
65 | #define RFC1201_HDR_SIZE 4 | |
66 | ||
67 | ||
68 | /* | |
69 | * The RFC1051-specific components. | |
70 | */ | |
d94d9fee | 71 | struct arc_rfc1051 { |
9adfbfb6 AB |
72 | __u8 proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */ |
73 | __u8 payload[0]; /* 507 bytes */ | |
1da177e4 LT |
74 | }; |
75 | #define RFC1051_HDR_SIZE 1 | |
76 | ||
77 | ||
78 | /* | |
79 | * The ethernet-encap-specific components. We have a real ethernet header | |
80 | * and some data. | |
81 | */ | |
d94d9fee | 82 | struct arc_eth_encap { |
9adfbfb6 | 83 | __u8 proto; /* Always ARC_P_ETHER */ |
1da177e4 | 84 | struct ethhdr eth; /* standard ethernet header (yuck!) */ |
9adfbfb6 | 85 | __u8 payload[0]; /* 493 bytes */ |
1da177e4 LT |
86 | }; |
87 | #define ETH_ENCAP_HDR_SIZE 14 | |
88 | ||
89 | ||
d94d9fee | 90 | struct arc_cap { |
9adfbfb6 AB |
91 | __u8 proto; |
92 | __u8 cookie[sizeof(int)]; /* Actually NOT sent over the network */ | |
1da177e4 | 93 | union { |
9adfbfb6 AB |
94 | __u8 ack; |
95 | __u8 raw[0]; /* 507 bytes */ | |
1da177e4 LT |
96 | } mes; |
97 | }; | |
98 | ||
99 | /* | |
100 | * The data needed by the actual arcnet hardware. | |
101 | * | |
102 | * Now, in the real arcnet hardware, the third and fourth bytes are the | |
103 | * 'offset' specification instead of the length, and the soft data is at | |
104 | * the _end_ of the 512-byte buffer. We hide this complexity inside the | |
105 | * driver. | |
106 | */ | |
d94d9fee | 107 | struct arc_hardware { |
9adfbfb6 | 108 | __u8 source, /* source ARCnet - filled in automagically */ |
1da177e4 LT |
109 | dest, /* destination ARCnet - 0 for broadcast */ |
110 | offset[2]; /* offset bytes (some weird semantics) */ | |
111 | }; | |
112 | #define ARC_HDR_SIZE 4 | |
113 | ||
114 | /* | |
115 | * This is an ARCnet frame header, as seen by the kernel (and userspace, | |
116 | * when you do a raw packet capture). | |
117 | */ | |
d94d9fee | 118 | struct archdr { |
1da177e4 LT |
119 | /* hardware requirements */ |
120 | struct arc_hardware hard; | |
121 | ||
122 | /* arcnet encapsulation-specific bits */ | |
123 | union { | |
124 | struct arc_rfc1201 rfc1201; | |
125 | struct arc_rfc1051 rfc1051; | |
126 | struct arc_eth_encap eth_encap; | |
127 | struct arc_cap cap; | |
9adfbfb6 | 128 | __u8 raw[0]; /* 508 bytes */ |
1da177e4 LT |
129 | } soft; |
130 | }; | |
131 | ||
132 | #endif /* _LINUX_IF_ARCNET_H */ |