1 /****************************************************************************
3 ******* R O U T E H E A D E R
5 ****************************************************************************
7 Author : Ian Nandhra / Jeremy Rolls
11 * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
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.
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.
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.
31 ----------------------------------------------------------------------------
33 ----------------------------------------------------------------------------
35 ***************************************************************************/
41 #define MAX_NODES 17 /* Maximum nodes in a subnet */
42 #define NODE_BYTES ((MAX_NODES / 8) + 1) /* Number of bytes needed for
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
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
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;
69 unsigned char cost; /* Cost down this link */
70 unsigned char route[NODE_BYTES]; /* Nodes thorough this route */
73 typedef struct ROUTE_STR ROUTE_STR;
75 COST_ROUTE cost_route[MAX_LINKS];
76 /* cost / route for this link */
77 ushort favoured; /* favoured link */
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 */
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
96 #define HIGHEST_RUP (ushort) 255 /* Set to Top one */
97 #define LOWEST_RUP (ushort) 248 /* Set to bottom one */
101 /*********** end of file ***********/