include/protocols/routed.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*-
  23  * Copyright (c) 1983, 1989, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)routed.h    8.1 (Berkeley) 6/2/93
  55  */
  56
  57 #ifndef _ROUTED_H_
  58 #define _ROUTED_H_
  59
  60 /*
  61  * Routing Information Protocol
  62  *
  63  * Derived from Xerox NS Routing Information Protocol
  64  * by changing 32-bit net numbers to sockaddr's and
  65  * padding stuff to 32-bit boundaries.
  66  */
  67 #define RIPVERSION      1
  68
  69 struct netinfo {
  70         struct  sockaddr rip_dst;       /* destination net/host */
  71         int     rip_metric;             /* cost of route */
  72 };
  73
  74 struct rip {
  75         u_char  rip_cmd;                /* request/response */
  76         u_char  rip_vers;               /* protocol version # */
  77         u_char  rip_res1[2];            /* pad to 32-bit boundary */
  78         union {
  79                 struct  netinfo ru_nets[1];     /* variable length... */
  80                 char    ru_tracefile[1];        /* ditto ... */
  81         } ripun;
  82 #define rip_nets        ripun.ru_nets
  83 #define rip_tracefile   ripun.ru_tracefile
  84 };
  85
  86 /*
  87  * Packet types.
  88  */
  89 #define RIPCMD_REQUEST          1       /* want info */
  90 #define RIPCMD_RESPONSE         2       /* responding to request */
  91 #define RIPCMD_TRACEON          3       /* turn tracing on */
  92 #define RIPCMD_TRACEOFF         4       /* turn it off */
  93
  94 #define RIPCMD_MAX              5
  95 #ifdef RIPCMDS
  96 char *ripcmds[RIPCMD_MAX] =
  97   { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" };
  98 #endif
  99
 100 #define HOPCNT_INFINITY         16      /* per Xerox NS */
 101 #define MAXPACKETSIZE           512     /* max broadcast size */
 102
 103 /*
 104  * Timer values used in managing the routing table.
 105  * Complete tables are broadcast every SUPPLY_INTERVAL seconds.
 106  * If changes occur between updates, dynamic updates containing only changes
 107  * may be sent.  When these are sent, a timer is set for a random value
 108  * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates
 109  * are sent until the timer expires.
 110  *
 111  * Every update of a routing entry forces an entry's timer to be reset.
 112  * After EXPIRE_TIME without updates, the entry is marked invalid,
 113  * but held onto until GARBAGE_TIME so that others may
 114  * see it "be deleted".
 115  */
 116 #define TIMER_RATE              30      /* alarm clocks every 30 seconds */
 117
 118 #define SUPPLY_INTERVAL         30      /* time to supply tables */
 119 #define MIN_WAITTIME            2       /* min. interval to broadcast changes */
 120 #define MAX_WAITTIME            5       /* max. time to delay changes */
 121
 122 #define EXPIRE_TIME             180     /* time to mark entry invalid */
 123 #define GARBAGE_TIME            240     /* time to garbage collect */
 124
 125 #endif /* !_ROUTED_H_ */