route.h
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上传日期:2013-02-24
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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
- #ifdef SCCS_LABELS
- #ifndef lint
- /* static char *_rio_route_h_sccs = "@(#)route.h 1.3"; */
- #endif
- #endif
- #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 ***********/