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