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 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 64struct PKT { 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]; 72 /* Actual data :-) */ 73 u16 csum; /* C-SUM */ 74}; 75#endif 76 77/*********** end of file ***********/ 78