pkt.h
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上传日期:2013-04-10
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文件大小:4k
- /****************************************************************************
- ******* *******
- ******* P A C K E T H E A D E R F I L E
- ******* *******
- ****************************************************************************
- Author : Ian Nandhra / Jeremy Rolls
- Date :
- *
- * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- Version : 0.01
- Mods
- ----------------------------------------------------------------------------
- Date By Description
- ----------------------------------------------------------------------------
- ***************************************************************************/
- #ifndef _pkt_h
- #define _pkt_h 1
- #ifdef SCCS_LABELS
- #ifndef lint
- /* static char *_rio_pkt_h_sccs = "@(#)pkt.h 1.8"; */
- #endif
- #endif
- #define MAX_TTL 0xf
- #define PKT_CMD_BIT ((ushort) 0x080)
- #define PKT_CMD_DATA ((ushort) 0x080)
- #define PKT_ACK ((ushort) 0x040)
- #define PKT_TGL ((ushort) 0x020)
- #define PKT_LEN_MASK ((ushort) 0x07f)
- #define DATA_WNDW ((ushort) 0x10)
- #define PKT_TTL_MASK ((ushort) 0x0f)
- #define PKT_MAX_DATA_LEN 72
- #define PKT_LENGTH sizeof(struct PKT)
- #define SYNC_PKT_LENGTH (PKT_LENGTH + 4)
- #define CONTROL_PKT_LEN_MASK PKT_LEN_MASK
- #define CONTROL_PKT_CMD_BIT PKT_CMD_BIT
- #define CONTROL_PKT_ACK (PKT_ACK << 8)
- #define CONTROL_PKT_TGL (PKT_TGL << 8)
- #define CONTROL_PKT_TTL_MASK (PKT_TTL_MASK << 8)
- #define CONTROL_DATA_WNDW (DATA_WNDW << 8)
- struct PKT {
- #ifdef INKERNEL
- BYTE dest_unit ; /* Destination Unit Id */
- BYTE dest_port ; /* Destination POrt */
- BYTE src_unit ; /* Source Unit Id */
- BYTE src_port ; /* Source POrt */
- #else
- union
- {
- ushort destination; /* Complete destination */
- struct
- {
- unsigned char unit; /* Destination unit */
- unsigned char port; /* Destination port */
- } s1;
- } u1;
- union
- {
- ushort source; /* Complete source */
- struct
- {
- unsigned char unit; /* Source unit */
- unsigned char port; /* Source port */
- } s2;
- } u2;
- #endif
- #ifdef INKERNEL
- BYTE len ;
- BYTE control;
- #else
- union
- {
- ushort control;
- struct
- {
- unsigned char len;
- unsigned char control;
- } s3;
- } u3;
- #endif
- BYTE data[PKT_MAX_DATA_LEN] ;
- /* Actual data :-) */
- WORD csum ; /* C-SUM */
- } ;
- #endif
- /*********** end of file ***********/