1 /* 2 * Copyright (c) 1985 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This file includes significant work done at Cornell University by 6 * Bill Nesheim. That work included by permission. 7 * 8 * Redistribution and use in source and binary forms are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * @(#)protocol.h 5.5 (Berkeley) 09/19/88 21 */ 22 23 /* 24 * Xerox Routing Information Protocol 25 * 26 */ 27 28 struct netinfo { 29 union ns_net rip_dst; /* destination net */ 30 u_short rip_metric; /* cost of route */ 31 }; 32 33 struct rip { 34 u_short rip_cmd; /* request/response */ 35 struct netinfo rip_nets[1]; /* variable length */ 36 }; 37 38 /* 39 * Packet types. 40 */ 41 #define RIPCMD_REQUEST 1 /* want info */ 42 #define RIPCMD_RESPONSE 2 /* responding to request */ 43 44 #define RIPCMD_MAX 3 45 #ifdef RIPCMDS 46 char *ripcmds[RIPCMD_MAX] = 47 { "#0", "REQUEST", "RESPONSE" }; 48 #endif 49 50 #define HOPCNT_INFINITY 16 /* per Xerox NS */ 51 #define DSTNETS_ALL 0xffffffff /* per Xerox NS */ 52 #define MAXPACKETSIZE 512 /* max broadcast size */ 53 54 extern union ns_net ns_anynet; 55 extern union ns_net ns_zeronet; 56 57 /* 58 * Timer values used in managing the routing table. 59 * Every update forces an entry's timer to be reset. After 60 * EXPIRE_TIME without updates, the entry is marked invalid, 61 * but held onto until GARBAGE_TIME so that others may 62 * see it "be deleted". 63 */ 64 #define TIMER_RATE 30 /* alarm clocks every 30 seconds */ 65 66 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 67 68 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 69 #define GARBAGE_TIME 240 /* time to garbage collect */ 70