1/*-
  2 * Copyright (c) 1983, 1989, 1993
  3 *	The Regents of the University of California.  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 * 4. Neither the name of the University nor the names of its contributors
 14 *    may be used to endorse or promote products derived from this software
 15 *    without specific prior written permission.
 16 *
 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE.
 28 *
 29 *	@(#)routed.h	8.1 (Berkeley) 6/2/93
 30 */
 31
 32#ifndef _PROTOCOLS_ROUTED_H
 33#define	_PROTOCOLS_ROUTED_H 1
 34
 35#include <sys/socket.h>
 36/*
 37 * Routing Information Protocol
 38 *
 39 * Derived from Xerox NS Routing Information Protocol
 40 * by changing 32-bit net numbers to sockaddr's and
 41 * padding stuff to 32-bit boundaries.
 42 */
 43#define	RIPVERSION	1
 44
 45struct netinfo {
 46	struct	sockaddr rip_dst;	/* destination net/host */
 47	int	rip_metric;		/* cost of route */
 48};
 49
 50struct rip {
 51	unsigned char	rip_cmd;		/* request/response */
 52	unsigned char	rip_vers;		/* protocol version # */
 53	unsigned char	rip_res1[2];		/* pad to 32-bit boundary */
 54	union {
 55		struct	netinfo ru_nets[1];	/* variable length... */
 56		char	ru_tracefile[1];	/* ditto ... */
 57	} ripun;
 58#define	rip_nets	ripun.ru_nets
 59#define	rip_tracefile	ripun.ru_tracefile
 60};
 61
 62/*
 63 * Packet types.
 64 */
 65#define	RIPCMD_REQUEST		1	/* want info */
 66#define	RIPCMD_RESPONSE		2	/* responding to request */
 67#define	RIPCMD_TRACEON		3	/* turn tracing on */
 68#define	RIPCMD_TRACEOFF		4	/* turn it off */
 69
 70#define	RIPCMD_MAX		5
 71#ifdef RIPCMDS
 72char *ripcmds[RIPCMD_MAX] =
 73  { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" };
 74#endif
 75
 76#define	HOPCNT_INFINITY		16	/* per Xerox NS */
 77#define	MAXPACKETSIZE		512	/* max broadcast size */
 78
 79/*
 80 * Timer values used in managing the routing table.
 81 * Complete tables are broadcast every SUPPLY_INTERVAL seconds.
 82 * If changes occur between updates, dynamic updates containing only changes
 83 * may be sent.  When these are sent, a timer is set for a random value
 84 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates
 85 * are sent until the timer expires.
 86 *
 87 * Every update of a routing entry forces an entry's timer to be reset.
 88 * After EXPIRE_TIME without updates, the entry is marked invalid,
 89 * but held onto until GARBAGE_TIME so that others may
 90 * see it "be deleted".
 91 */
 92#define	TIMER_RATE		30	/* alarm clocks every 30 seconds */
 93
 94#define	SUPPLY_INTERVAL		30	/* time to supply tables */
 95#define	MIN_WAITTIME		2	/* min. interval to broadcast changes */
 96#define	MAX_WAITTIME		5	/* max. time to delay changes */
 97
 98#define	EXPIRE_TIME		180	/* time to mark entry invalid */
 99#define	GARBAGE_TIME		240	/* time to garbage collect */
100
101#endif /* protocols/routed.h */