1 /*- 2 * Copyright (c) 1983, 1989 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)routed.h 5.3 (Berkeley) 4/3/91 34 * $Id: routed.h,v 1.2 1993/08/01 18:46:09 mycroft Exp $ 35 */ 36 37 #ifndef _ROUTED_H_ 38 #define _ROUTED_H_ 39 40 /* 41 * Routing Information Protocol 42 * 43 * Derived from Xerox NS Routing Information Protocol 44 * by changing 32-bit net numbers to sockaddr's and 45 * padding stuff to 32-bit boundaries. 46 */ 47 #define RIPVERSION 1 48 49 struct netinfo { 50 struct sockaddr rip_dst; /* destination net/host */ 51 int rip_metric; /* cost of route */ 52 }; 53 54 struct rip { 55 u_char rip_cmd; /* request/response */ 56 u_char rip_vers; /* protocol version # */ 57 u_char rip_res1[2]; /* pad to 32-bit boundary */ 58 union { 59 struct netinfo ru_nets[1]; /* variable length... */ 60 char ru_tracefile[1]; /* ditto ... */ 61 } ripun; 62 #define rip_nets ripun.ru_nets 63 #define rip_tracefile ripun.ru_tracefile 64 }; 65 66 /* 67 * Packet types. 68 */ 69 #define RIPCMD_REQUEST 1 /* want info */ 70 #define RIPCMD_RESPONSE 2 /* responding to request */ 71 #define RIPCMD_TRACEON 3 /* turn tracing on */ 72 #define RIPCMD_TRACEOFF 4 /* turn it off */ 73 74 #define RIPCMD_MAX 5 75 #ifdef RIPCMDS 76 char *ripcmds[RIPCMD_MAX] = 77 { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" }; 78 #endif 79 80 #define HOPCNT_INFINITY 16 /* per Xerox NS */ 81 #define MAXPACKETSIZE 512 /* max broadcast size */ 82 83 /* 84 * Timer values used in managing the routing table. 85 * Complete tables are broadcast every SUPPLY_INTERVAL seconds. 86 * If changes occur between updates, dynamic updates containing only changes 87 * may be sent. When these are sent, a timer is set for a random value 88 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates 89 * are sent until the timer expires. 90 * 91 * Every update of a routing entry forces an entry's timer to be reset. 92 * After EXPIRE_TIME without updates, the entry is marked invalid, 93 * but held onto until GARBAGE_TIME so that others may 94 * see it "be deleted". 95 */ 96 #define TIMER_RATE 30 /* alarm clocks every 30 seconds */ 97 98 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 99 #define MIN_WAITTIME 2 /* min. interval to broadcast changes */ 100 #define MAX_WAITTIME 5 /* max. time to delay changes */ 101 102 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 103 #define GARBAGE_TIME 240 /* time to garbage collect */ 104 105 #endif /* !_ROUTED_H_ */ 106