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/****************************************************************************
******* *******
******* R O U T E H E A D E R
******* *******
****************************************************************************
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 _route_h
#define _route_h
#define MAX_LINKS 4
#define MAX_NODES 17 /* Maximum nodes in a subnet */
#define NODE_BYTES ((MAX_NODES / 8) + 1) /* Number of bytes needed for
1 bit per node */
#define ROUTE_DATA_SIZE (NODE_BYTES + 2) /* Number of bytes for complete
info about cost etc. */
#define ROUTES_PER_PACKET ((PKT_MAX_DATA_LEN -2)/ ROUTE_DATA_SIZE)
/* Number of nodes we can squeeze
into one packet */
#define MAX_TOPOLOGY_PACKETS (MAX_NODES / ROUTES_PER_PACKET + 1)
/************************************************
* Define the types of command for the ROUTE RUP.
************************************************/
#define ROUTE_REQUEST 0 /* Request an ID */
#define ROUTE_FOAD 1 /* Kill the RTA */
#define ROUTE_ALREADY 2 /* ID given already */
#define ROUTE_USED 3 /* All ID's used */
#define ROUTE_ALLOCATE 4 /* Here it is */
#define ROUTE_REQ_TOP 5 /* I bet you didn't expect....
the Topological Inquisition */
#define ROUTE_TOPOLOGY 6 /* Topology request answered FD */
/*******************************************************************
* Define the Route Map Structure
*
* The route map gives a pointer to a Link Structure to use.
* This allows Disconnected Links to be checked quickly
******************************************************************/
typedef struct COST_ROUTE COST_ROUTE;
struct COST_ROUTE {
unsigned char cost; /* Cost down this link */
unsigned char route[NODE_BYTES]; /* Nodes thorough this route */
};
typedef struct ROUTE_STR ROUTE_STR;
struct ROUTE_STR {
COST_ROUTE cost_route[MAX_LINKS];
/* cost / route for this link */
ushort favoured; /* favoured link */
};
#define NO_LINK (short) 5 /* Link unattached */
#define ROUTE_NO_ID (short) 100 /* No Id */
#define ROUTE_DISCONNECT (ushort) 0xff /* Not connected */
#define ROUTE_INTERCONNECT (ushort) 0x40 /* Sub-net interconnect */
#define SYNC_RUP (ushort) 255
#define COMMAND_RUP (ushort) 254
#define ERROR_RUP (ushort) 253
#define POLL_RUP (ushort) 252
#define BOOT_RUP (ushort) 251
#define ROUTE_RUP (ushort) 250
#define STATUS_RUP (ushort) 249
#define POWER_RUP (ushort) 248
#define HIGHEST_RUP (ushort) 255 /* Set to Top one */
#define LOWEST_RUP (ushort) 248 /* Set to bottom one */
#endif
/*********** end of file ***********/
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