inet/protocols/routed.h

   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
  45 struct netinfo {
  46         struct  sockaddr rip_dst;       /* destination net/host */
  47         int     rip_metric;             /* cost of route */
  48 };
  49
  50 struct 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
  72 char *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 */