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1da177e4 LT |
1 | /**************************************************************************** |
2 | ******* ******* | |
3 | ******* P A C K E T H E A D E R F I L E | |
4 | ******* ******* | |
5 | **************************************************************************** | |
6 | ||
7 | Author : Ian Nandhra / Jeremy Rolls | |
8 | Date : | |
9 | ||
10 | * | |
11 | * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | ||
27 | Version : 0.01 | |
28 | ||
29 | ||
30 | Mods | |
31 | ---------------------------------------------------------------------------- | |
32 | Date By Description | |
33 | ---------------------------------------------------------------------------- | |
34 | ||
35 | ***************************************************************************/ | |
36 | ||
37 | #ifndef _pkt_h | |
38 | #define _pkt_h 1 | |
39 | ||
1da177e4 LT |
40 | #define PKT_CMD_BIT ((ushort) 0x080) |
41 | #define PKT_CMD_DATA ((ushort) 0x080) | |
42 | ||
43 | #define PKT_ACK ((ushort) 0x040) | |
44 | ||
45 | #define PKT_TGL ((ushort) 0x020) | |
46 | ||
47 | #define PKT_LEN_MASK ((ushort) 0x07f) | |
48 | ||
49 | #define DATA_WNDW ((ushort) 0x10) | |
50 | #define PKT_TTL_MASK ((ushort) 0x0f) | |
51 | ||
52 | #define PKT_MAX_DATA_LEN 72 | |
53 | ||
54 | #define PKT_LENGTH sizeof(struct PKT) | |
55 | #define SYNC_PKT_LENGTH (PKT_LENGTH + 4) | |
56 | ||
57 | #define CONTROL_PKT_LEN_MASK PKT_LEN_MASK | |
58 | #define CONTROL_PKT_CMD_BIT PKT_CMD_BIT | |
59 | #define CONTROL_PKT_ACK (PKT_ACK << 8) | |
60 | #define CONTROL_PKT_TGL (PKT_TGL << 8) | |
61 | #define CONTROL_PKT_TTL_MASK (PKT_TTL_MASK << 8) | |
62 | #define CONTROL_DATA_WNDW (DATA_WNDW << 8) | |
63 | ||
8d8706e2 | 64 | struct PKT { |
74769abf AC |
65 | u8 dest_unit; /* Destination Unit Id */ |
66 | u8 dest_port; /* Destination POrt */ | |
67 | u8 src_unit; /* Source Unit Id */ | |
68 | u8 src_port; /* Source POrt */ | |
69 | u8 len; | |
70 | u8 control; | |
71 | u8 data[PKT_MAX_DATA_LEN]; | |
8d8706e2 | 72 | /* Actual data :-) */ |
74769abf | 73 | u16 csum; /* C-SUM */ |
8d8706e2 | 74 | }; |
1da177e4 LT |
75 | #endif |
76 | ||
77 | /*********** end of file ***********/ |