1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)routed.h 8.1 (Berkeley) 6/2/93 32 * 33 * $FreeBSD$ 34 * $Revision: 2.26 $ 35 */ 36 37 #ifndef _ROUTED_H_ 38 #define _ROUTED_H_ 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* 44 * Routing Information Protocol 45 * 46 * Derived from Xerox NS Routing Information Protocol 47 * by changing 32-bit net numbers to sockaddr's and 48 * padding stuff to 32-bit boundaries. 49 */ 50 51 #define RIPv1 1 52 #define RIPv2 2 53 #ifndef RIPVERSION 54 #define RIPVERSION RIPv1 55 #endif 56 57 #define RIP_PORT 520 58 59 #if RIPVERSION == 1 60 /* Note that this so called sockaddr has a 2-byte sa_family and no sa_len. 61 * It is not a UNIX sockaddr, but the shape of an address as defined 62 * in RIPv1. It is still defined to allow old versions of programs 63 * such as `gated` to use this file to define RIPv1. 64 */ 65 struct netinfo { 66 struct sockaddr rip_dst; /* destination net/host */ 67 u_int32_t rip_metric; /* cost of route */ 68 }; 69 #else 70 struct netinfo { 71 u_int16_t n_family; 72 #define RIP_AF_INET htons(AF_INET) 73 #define RIP_AF_UNSPEC 0 74 #define RIP_AF_AUTH 0xffff 75 u_int16_t n_tag; /* optional in RIPv2 */ 76 u_int32_t n_dst; /* destination net or host */ 77 #define RIP_DEFAULT 0 78 u_int32_t n_mask; /* netmask in RIPv2 */ 79 u_int32_t n_nhop; /* optional next hop in RIPv2 */ 80 u_int32_t n_metric; /* cost of route */ 81 }; 82 #endif 83 84 /* RIPv2 authentication */ 85 struct netauth { 86 u_int16_t a_family; /* always RIP_AF_AUTH */ 87 u_int16_t a_type; 88 #define RIP_AUTH_NONE 0 89 #define RIP_AUTH_PW htons(2) /* password type */ 90 #define RIP_AUTH_MD5 htons(3) /* Keyed MD5 */ 91 union { 92 #define RIP_AUTH_PW_LEN 16 93 u_int8_t au_pw[RIP_AUTH_PW_LEN]; 94 struct a_md5 { 95 int16_t md5_pkt_len; /* RIP-II packet length */ 96 int8_t md5_keyid; /* key ID and auth data len */ 97 int8_t md5_auth_len; /* 16 */ 98 u_int32_t md5_seqno; /* sequence number */ 99 u_int32_t rsvd[2]; /* must be 0 */ 100 #define RIP_AUTH_MD5_KEY_LEN RIP_AUTH_PW_LEN 101 #define RIP_AUTH_MD5_HASH_XTRA (sizeof(struct netauth)-sizeof(struct a_md5)) 102 #define RIP_AUTH_MD5_HASH_LEN (RIP_AUTH_MD5_KEY_LEN+RIP_AUTH_MD5_HASH_XTRA) 103 } a_md5; 104 } au; 105 }; 106 107 struct rip { 108 u_int8_t rip_cmd; /* request/response */ 109 u_int8_t rip_vers; /* protocol version # */ 110 u_int16_t rip_res1; /* pad to 32-bit boundary */ 111 union { /* variable length... */ 112 struct netinfo ru_nets[1]; 113 int8_t ru_tracefile[1]; 114 struct netauth ru_auth[1]; 115 } ripun; 116 #define rip_nets ripun.ru_nets 117 #define rip_auths ripun.ru_auth 118 #define rip_tracefile ripun.ru_tracefile 119 }; 120 121 /* Packet types. 122 */ 123 #define RIPCMD_REQUEST 1 /* want info */ 124 #define RIPCMD_RESPONSE 2 /* responding to request */ 125 #define RIPCMD_TRACEON 3 /* turn tracing on */ 126 #define RIPCMD_TRACEOFF 4 /* turn it off */ 127 128 /* Gated extended RIP to include a "poll" command instead of using 129 * RIPCMD_REQUEST with (RIP_AF_UNSPEC, RIP_DEFAULT). RFC 1058 says 130 * command 5 is used by Sun Microsystems for its own purposes. 131 */ 132 #define RIPCMD_POLL 5 133 134 #define RIPCMD_MAX 6 135 136 #ifdef RIPCMDS 137 const char *ripcmds[RIPCMD_MAX] = { 138 "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" 139 }; 140 #endif 141 142 #define HOPCNT_INFINITY 16 143 #define MAXPACKETSIZE 512 /* max broadcast size */ 144 #define NETS_LEN ((MAXPACKETSIZE-sizeof(struct rip)) \ 145 / sizeof(struct netinfo) +1) 146 147 #define INADDR_RIP_GROUP (u_int32_t)0xe0000009 /* 224.0.0.9 */ 148 149 150 /* Timer values used in managing the routing table. 151 * 152 * Complete tables are broadcast every SUPPLY_INTERVAL seconds. 153 * If changes occur between updates, dynamic updates containing only changes 154 * may be sent. When these are sent, a timer is set for a random value 155 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates 156 * are sent until the timer expires. 157 * 158 * Every update of a routing entry forces an entry's timer to be reset. 159 * After EXPIRE_TIME without updates, the entry is marked invalid, 160 * but held onto until GARBAGE_TIME so that others may see it, to 161 * "poison" the bad route. 162 */ 163 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 164 #define MIN_WAITTIME 2 /* min sec until next flash updates */ 165 #define MAX_WAITTIME 5 /* max sec until flash update */ 166 167 #define STALE_TIME 90 /* switch to a new gateway */ 168 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 169 #define GARBAGE_TIME 240 /* time to garbage collect */ 170 171 #ifdef __cplusplus 172 } 173 #endif 174 #endif /* !_ROUTED_H_ */ 175