1 /*- 2 * Copyright (c) 1983, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)routed.h 8.1 (Berkeley) 06/02/93 8 */ 9 10 #ifndef _ROUTED_H_ 11 #define _ROUTED_H_ 12 13 /* 14 * Routing Information Protocol 15 * 16 * Derived from Xerox NS Routing Information Protocol 17 * by changing 32-bit net numbers to sockaddr's and 18 * padding stuff to 32-bit boundaries. 19 */ 20 #define RIPVERSION 1 21 22 struct netinfo { 23 struct sockaddr rip_dst; /* destination net/host */ 24 int rip_metric; /* cost of route */ 25 }; 26 27 struct rip { 28 u_char rip_cmd; /* request/response */ 29 u_char rip_vers; /* protocol version # */ 30 u_char rip_res1[2]; /* pad to 32-bit boundary */ 31 union { 32 struct netinfo ru_nets[1]; /* variable length... */ 33 char ru_tracefile[1]; /* ditto ... */ 34 } ripun; 35 #define rip_nets ripun.ru_nets 36 #define rip_tracefile ripun.ru_tracefile 37 }; 38 39 /* 40 * Packet types. 41 */ 42 #define RIPCMD_REQUEST 1 /* want info */ 43 #define RIPCMD_RESPONSE 2 /* responding to request */ 44 #define RIPCMD_TRACEON 3 /* turn tracing on */ 45 #define RIPCMD_TRACEOFF 4 /* turn it off */ 46 47 #define RIPCMD_MAX 5 48 #ifdef RIPCMDS 49 char *ripcmds[RIPCMD_MAX] = 50 { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" }; 51 #endif 52 53 #define HOPCNT_INFINITY 16 /* per Xerox NS */ 54 #define MAXPACKETSIZE 512 /* max broadcast size */ 55 56 /* 57 * Timer values used in managing the routing table. 58 * Complete tables are broadcast every SUPPLY_INTERVAL seconds. 59 * If changes occur between updates, dynamic updates containing only changes 60 * may be sent. When these are sent, a timer is set for a random value 61 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates 62 * are sent until the timer expires. 63 * 64 * Every update of a routing entry forces an entry's timer to be reset. 65 * After EXPIRE_TIME without updates, the entry is marked invalid, 66 * but held onto until GARBAGE_TIME so that others may 67 * see it "be deleted". 68 */ 69 #define TIMER_RATE 30 /* alarm clocks every 30 seconds */ 70 71 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 72 #define MIN_WAITTIME 2 /* min. interval to broadcast changes */ 73 #define MAX_WAITTIME 5 /* max. time to delay changes */ 74 75 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 76 #define GARBAGE_TIME 240 /* time to garbage collect */ 77 78 #endif /* !_ROUTED_H_ */ 79