JezK
Edit File: routed.h
/*- * Copyright (c) 1983, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)routed.h 8.1 (Berkeley) 6/2/93 */ #ifndef _PROTOCOLS_ROUTED_H #define _PROTOCOLS_ROUTED_H 1 #include <sys/socket.h> /* * Routing Information Protocol * * Derived from Xerox NS Routing Information Protocol * by changing 32-bit net numbers to sockaddr's and * padding stuff to 32-bit boundaries. */ #define RIPVERSION 1 struct netinfo { struct sockaddr rip_dst; /* destination net/host */ int rip_metric; /* cost of route */ }; struct rip { unsigned char rip_cmd; /* request/response */ unsigned char rip_vers; /* protocol version # */ unsigned char rip_res1[2]; /* pad to 32-bit boundary */ union { struct netinfo ru_nets[1]; /* variable length... */ char ru_tracefile[1]; /* ditto ... */ } ripun; #define rip_nets ripun.ru_nets #define rip_tracefile ripun.ru_tracefile }; /* * Packet types. */ #define RIPCMD_REQUEST 1 /* want info */ #define RIPCMD_RESPONSE 2 /* responding to request */ #define RIPCMD_TRACEON 3 /* turn tracing on */ #define RIPCMD_TRACEOFF 4 /* turn it off */ #define RIPCMD_MAX 5 #ifdef RIPCMDS char *ripcmds[RIPCMD_MAX] = { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" }; #endif #define HOPCNT_INFINITY 16 /* per Xerox NS */ #define MAXPACKETSIZE 512 /* max broadcast size */ /* * Timer values used in managing the routing table. * Complete tables are broadcast every SUPPLY_INTERVAL seconds. * If changes occur between updates, dynamic updates containing only changes * may be sent. When these are sent, a timer is set for a random value * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates * are sent until the timer expires. * * Every update of a routing entry forces an entry's timer to be reset. * After EXPIRE_TIME without updates, the entry is marked invalid, * but held onto until GARBAGE_TIME so that others may * see it "be deleted". */ #define TIMER_RATE 30 /* alarm clocks every 30 seconds */ #define SUPPLY_INTERVAL 30 /* time to supply tables */ #define MIN_WAITTIME 2 /* min. interval to broadcast changes */ #define MAX_WAITTIME 5 /* max. time to delay changes */ #define EXPIRE_TIME 180 /* time to mark entry invalid */ #define GARBAGE_TIME 240 /* time to garbage collect */ #endif /* protocols/routed.h */