include/protocols/routed.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1983, 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)routed.h    8.1 (Berkeley) 6/2/93
  56  */
  57
  58 #ifndef _ROUTED_H_
  59 #define _ROUTED_H_
  60
  61 /*
  62  * Routing Information Protocol
  63  *
  64  * Derived from Xerox NS Routing Information Protocol
  65  * by changing 32-bit net numbers to sockaddr's and
  66  * padding stuff to 32-bit boundaries.
  67  */
  68 #define RIPVERSION      1
  69
  70 struct netinfo {
  71         struct  sockaddr rip_dst;       /* destination net/host */
  72         int     rip_metric;             /* cost of route */
  73 };
  74
  75 struct rip {
  76         u_char  rip_cmd;                /* request/response */
  77         u_char  rip_vers;               /* protocol version # */
  78         u_char  rip_res1[2];            /* pad to 32-bit boundary */
  79         union {
  80                 struct  netinfo ru_nets[1];     /* variable length... */
  81                 char    ru_tracefile[1];        /* ditto ... */
  82         } ripun;
  83 #define rip_nets        ripun.ru_nets
  84 #define rip_tracefile   ripun.ru_tracefile
  85 };
  86
  87 /*
  88  * Packet types.
  89  */
  90 #define RIPCMD_REQUEST          1       /* want info */
  91 #define RIPCMD_RESPONSE         2       /* responding to request */
  92 #define RIPCMD_TRACEON          3       /* turn tracing on */
  93 #define RIPCMD_TRACEOFF         4       /* turn it off */
  94
  95 #define RIPCMD_MAX              5
  96 #ifdef RIPCMDS
  97 char *ripcmds[RIPCMD_MAX] =
  98   { "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" };
  99 #endif
 100
 101 #define HOPCNT_INFINITY         16      /* per Xerox NS */
 102 #define MAXPACKETSIZE           512     /* max broadcast size */
 103
 104 /*
 105  * Timer values used in managing the routing table.
 106  * Complete tables are broadcast every SUPPLY_INTERVAL seconds.
 107  * If changes occur between updates, dynamic updates containing only changes
 108  * may be sent.  When these are sent, a timer is set for a random value
 109  * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates
 110  * are sent until the timer expires.
 111  *
 112  * Every update of a routing entry forces an entry's timer to be reset.
 113  * After EXPIRE_TIME without updates, the entry is marked invalid,
 114  * but held onto until GARBAGE_TIME so that others may
 115  * see it "be deleted".
 116  */
 117 #define TIMER_RATE              30      /* alarm clocks every 30 seconds */
 118
 119 #define SUPPLY_INTERVAL         30      /* time to supply tables */
 120 #define MIN_WAITTIME            2       /* min. interval to broadcast changes */
 121 #define MAX_WAITTIME            5       /* max. time to delay changes */
 122
 123 #define EXPIRE_TIME             180     /* time to mark entry invalid */
 124 #define GARBAGE_TIME            240     /* time to garbage collect */
 125
 126 #endif /* !_ROUTED_H_ */