1 /* $NetBSD: routed.h,v 1.5 1996/08/10 01:37:09 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1983, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)routed.h 8.1 (Berkeley) 6/2/93 36 */ 37 38 #ifndef _ROUTED_H_ 39 #define _ROUTED_H_ 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /* 45 * Routing Information Protocol 46 * 47 * Derived from Xerox NS Routing Information Protocol 48 * by changing 32-bit net numbers to sockaddr's and 49 * padding stuff to 32-bit boundaries. 50 */ 51 52 #define RIP_VERSION_0 0 53 #define RIP_VERSION_1 1 54 #define RIP_VERSION_2 2 55 56 #define RIPv1 RIP_VERSION_1 57 #define RIPv2 RIP_VERSION_2 58 #ifndef RIPVERSION 59 #define RIPVERSION RIPv1 60 #endif 61 62 #define RIP_PORT 520 63 64 #if RIPVERSION == 1 65 struct netinfo { 66 u_int16_t rip_family; 67 u_int16_t rip_tag; 68 u_int32_t rip_dst; /* destination net/host */ 69 u_int32_t rip_metric; /* cost of route */ 70 }; 71 #else 72 struct netinfo { 73 u_int16_t n_family; 74 #define RIP_AF_INET htons(AF_INET) 75 #define RIP_AF_UNSPEC 0 76 #define RIP_AF_AUTH 0xffff 77 u_int16_t n_tag; /* optional in RIPv2 */ 78 u_int16_t n_dst; /* destination net or host */ 79 #define RIP_DEFAULT 0 80 u_int32_t n_mask; /* netmask in RIPv2 */ 81 u_int32_t n_nhop; /* optional next hop in RIPv2 */ 82 u_int32_t n_metric; /* cost of route */ 83 }; 84 #endif 85 86 /* RIPv2 authentication */ 87 struct netauth { 88 u_int16_t a_type; 89 #define RIP_AUTH_PW htons(2) /* password type */ 90 union { 91 #define RIP_AUTH_PW_LEN 16 92 int8_t au_pw[RIP_AUTH_PW_LEN]; 93 } au; 94 }; 95 96 struct rip { 97 u_int8_t rip_cmd; /* request/response */ 98 u_int8_t rip_vers; /* protocol version # */ 99 u_int16_t rip_res1; /* pad to 32-bit boundary */ 100 union { /* variable length... */ 101 struct netinfo ru_nets[1]; 102 int8_t ru_tracefile[1]; 103 struct netauth ru_auth[1]; 104 } ripun; 105 #define rip_nets ripun.ru_nets 106 #define rip_tracefile ripun.ru_tracefile 107 }; 108 109 /* Packet types. 110 */ 111 #define RIPCMD_REQUEST 1 /* want info */ 112 #define RIPCMD_RESPONSE 2 /* responding to request */ 113 #define RIPCMD_TRACEON 3 /* turn tracing on */ 114 #define RIPCMD_TRACEOFF 4 /* turn it off */ 115 116 /* Gated extended RIP to include a "poll" command instead of using 117 * RIPCMD_REQUEST with (RIP_AF_UNSPEC, RIP_DEFAULT). RFC 1058 says 118 * command 5 is used by Sun Microsystems for its own purposes. 119 */ 120 #define RIPCMD_POLL 5 121 122 #define RIPCMD_MAX 6 123 124 #ifdef RIPCMDS 125 char *ripcmds[RIPCMD_MAX] = { 126 "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" 127 }; 128 #endif 129 130 #define HOPCNT_INFINITY 16 131 #define MAXPACKETSIZE 512 /* max broadcast size */ 132 #define NETS_LEN ((MAXPACKETSIZE-sizeof(struct rip)) \ 133 / sizeof(struct netinfo) +1) 134 135 #define INADDR_RIP_GROUP (u_int32_t)0xe0000009 /* 224.0.0.9 */ 136 137 138 /* Timer values used in managing the routing table. 139 * 140 * Complete tables are broadcast every SUPPLY_INTERVAL seconds. 141 * If changes occur between updates, dynamic updates containing only changes 142 * may be sent. When these are sent, a timer is set for a random value 143 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates 144 * are sent until the timer expires. 145 * 146 * Every update of a routing entry forces an entry's timer to be reset. 147 * After EXPIRE_TIME without updates, the entry is marked invalid, 148 * but held onto until GARBAGE_TIME so that others may see it, to 149 * "poison" the bad route. 150 */ 151 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 152 #define MIN_WAITTIME 2 /* min sec until next flash updates */ 153 #define MAX_WAITTIME 5 /* max sec until flash update */ 154 155 #define STALE_TIME 90 /* switch to a new gateway */ 156 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 157 #define GARBAGE_TIME 240 /* time to garbage collect */ 158 159 #ifdef __cplusplus 160 } 161 #endif 162 #endif /* !_ROUTED_H_ */ 163