1 /**************************************************************************** 2 ******* ******* 3 ******* R O U T E H E A D E R 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 _route_h 38 #define _route_h 39 40 #define MAX_LINKS 4 41 #define MAX_NODES 17 /* Maximum nodes in a subnet */ 42 #define NODE_BYTES ((MAX_NODES / 8) + 1) /* Number of bytes needed for 43 1 bit per node */ 44 #define ROUTE_DATA_SIZE (NODE_BYTES + 2) /* Number of bytes for complete 45 info about cost etc. */ 46 #define ROUTES_PER_PACKET ((PKT_MAX_DATA_LEN -2)/ ROUTE_DATA_SIZE) 47 /* Number of nodes we can squeeze 48 into one packet */ 49 #define MAX_TOPOLOGY_PACKETS (MAX_NODES / ROUTES_PER_PACKET + 1) 50 /************************************************ 51 * Define the types of command for the ROUTE RUP. 52 ************************************************/ 53 #define ROUTE_REQUEST 0 /* Request an ID */ 54 #define ROUTE_FOAD 1 /* Kill the RTA */ 55 #define ROUTE_ALREADY 2 /* ID given already */ 56 #define ROUTE_USED 3 /* All ID's used */ 57 #define ROUTE_ALLOCATE 4 /* Here it is */ 58 #define ROUTE_REQ_TOP 5 /* I bet you didn't expect.... 59 the Topological Inquisition */ 60 #define ROUTE_TOPOLOGY 6 /* Topology request answered FD */ 61 /******************************************************************* 62 * Define the Route Map Structure 63 * 64 * The route map gives a pointer to a Link Structure to use. 65 * This allows Disconnected Links to be checked quickly 66 ******************************************************************/ 67 typedef struct COST_ROUTE COST_ROUTE; 68 struct COST_ROUTE { 69 unsigned char cost; /* Cost down this link */ 70 unsigned char route[NODE_BYTES]; /* Nodes through this route */ 71 }; 72 73 typedef struct ROUTE_STR ROUTE_STR; 74 struct ROUTE_STR { 75 COST_ROUTE cost_route[MAX_LINKS]; 76 /* cost / route for this link */ 77 ushort favoured; /* favoured link */ 78 }; 79 80 81 #define NO_LINK (short) 5 /* Link unattached */ 82 #define ROUTE_NO_ID (short) 100 /* No Id */ 83 #define ROUTE_DISCONNECT (ushort) 0xff /* Not connected */ 84 #define ROUTE_INTERCONNECT (ushort) 0x40 /* Sub-net interconnect */ 85 86 87 #define SYNC_RUP (ushort) 255 88 #define COMMAND_RUP (ushort) 254 89 #define ERROR_RUP (ushort) 253 90 #define POLL_RUP (ushort) 252 91 #define BOOT_RUP (ushort) 251 92 #define ROUTE_RUP (ushort) 250 93 #define STATUS_RUP (ushort) 249 94 #define POWER_RUP (ushort) 248 95 96 #define HIGHEST_RUP (ushort) 255 /* Set to Top one */ 97 #define LOWEST_RUP (ushort) 248 /* Set to bottom one */ 98 99 #endif 100 101 /*********** end of file ***********/ 102