Preview: routed.h
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/usr/include/protocols/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 */
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