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 * $Revision: 2.26 $ 31 */ 32 33 #ifndef _ROUTED_H_ 34 #define _ROUTED_H_ 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * Routing Information Protocol 41 * 42 * Derived from Xerox NS Routing Information Protocol 43 * by changing 32-bit net numbers to sockaddr's and 44 * padding stuff to 32-bit boundaries. 45 */ 46 47 #define RIPv1 1 48 #define RIPv2 2 49 #ifndef RIPVERSION 50 #define RIPVERSION RIPv1 51 #endif 52 53 #define RIP_PORT 520 54 55 #if RIPVERSION == 1 56 /* Note that this so called sockaddr has a 2-byte sa_family and no sa_len. 57 * It is not a UNIX sockaddr, but the shape of an address as defined 58 * in RIPv1. It is still defined to allow old versions of programs 59 * such as `gated` to use this file to define RIPv1. 60 */ 61 struct netinfo { 62 struct sockaddr rip_dst; /* destination net/host */ 63 u_int32_t rip_metric; /* cost of route */ 64 }; 65 #else 66 struct netinfo { 67 u_int16_t n_family; 68 #define RIP_AF_INET htons(AF_INET) 69 #define RIP_AF_UNSPEC 0 70 #define RIP_AF_AUTH 0xffff 71 u_int16_t n_tag; /* optional in RIPv2 */ 72 u_int32_t n_dst; /* destination net or host */ 73 #define RIP_DEFAULT 0 74 u_int32_t n_mask; /* netmask in RIPv2 */ 75 u_int32_t n_nhop; /* optional next hop in RIPv2 */ 76 u_int32_t n_metric; /* cost of route */ 77 }; 78 #endif 79 80 /* RIPv2 authentication */ 81 struct netauth { 82 u_int16_t a_family; /* always RIP_AF_AUTH */ 83 u_int16_t a_type; 84 #define RIP_AUTH_NONE 0 85 #define RIP_AUTH_PW htons(2) /* password type */ 86 #define RIP_AUTH_MD5 htons(3) /* Keyed MD5 */ 87 union { 88 #define RIP_AUTH_PW_LEN 16 89 u_int8_t au_pw[RIP_AUTH_PW_LEN]; 90 struct a_md5 { 91 int16_t md5_pkt_len; /* RIP-II packet length */ 92 int8_t md5_keyid; /* key ID and auth data len */ 93 int8_t md5_auth_len; /* 16 */ 94 u_int32_t md5_seqno; /* sequence number */ 95 u_int32_t rsvd[2]; /* must be 0 */ 96 #define RIP_AUTH_MD5_KEY_LEN RIP_AUTH_PW_LEN 97 #define RIP_AUTH_MD5_HASH_XTRA (sizeof(struct netauth)-sizeof(struct a_md5)) 98 #define RIP_AUTH_MD5_HASH_LEN (RIP_AUTH_MD5_KEY_LEN+RIP_AUTH_MD5_HASH_XTRA) 99 } a_md5; 100 } au; 101 }; 102 103 struct rip { 104 u_int8_t rip_cmd; /* request/response */ 105 u_int8_t rip_vers; /* protocol version # */ 106 u_int16_t rip_res1; /* pad to 32-bit boundary */ 107 union { /* variable length... */ 108 struct netinfo ru_nets[1]; 109 int8_t ru_tracefile[1]; 110 struct netauth ru_auth[1]; 111 } ripun; 112 #define rip_nets ripun.ru_nets 113 #define rip_auths ripun.ru_auth 114 #define rip_tracefile ripun.ru_tracefile 115 }; 116 117 /* Packet types. 118 */ 119 #define RIPCMD_REQUEST 1 /* want info */ 120 #define RIPCMD_RESPONSE 2 /* responding to request */ 121 #define RIPCMD_TRACEON 3 /* turn tracing on */ 122 #define RIPCMD_TRACEOFF 4 /* turn it off */ 123 124 /* Gated extended RIP to include a "poll" command instead of using 125 * RIPCMD_REQUEST with (RIP_AF_UNSPEC, RIP_DEFAULT). RFC 1058 says 126 * command 5 is used by Sun Microsystems for its own purposes. 127 */ 128 #define RIPCMD_POLL 5 129 130 #define RIPCMD_MAX 6 131 132 #ifdef RIPCMDS 133 const char *ripcmds[RIPCMD_MAX] = { 134 "#0", "REQUEST", "RESPONSE", "TRACEON", "TRACEOFF" 135 }; 136 #endif 137 138 #define HOPCNT_INFINITY 16 139 #define MAXPACKETSIZE 512 /* max broadcast size */ 140 #define NETS_LEN ((MAXPACKETSIZE-sizeof(struct rip)) \ 141 / sizeof(struct netinfo) +1) 142 143 #define INADDR_RIP_GROUP (u_int32_t)0xe0000009 /* 224.0.0.9 */ 144 145 146 /* Timer values used in managing the routing table. 147 * 148 * Complete tables are broadcast every SUPPLY_INTERVAL seconds. 149 * If changes occur between updates, dynamic updates containing only changes 150 * may be sent. When these are sent, a timer is set for a random value 151 * between MIN_WAITTIME and MAX_WAITTIME, and no additional dynamic updates 152 * are sent until the timer expires. 153 * 154 * Every update of a routing entry forces an entry's timer to be reset. 155 * After EXPIRE_TIME without updates, the entry is marked invalid, 156 * but held onto until GARBAGE_TIME so that others may see it, to 157 * "poison" the bad route. 158 */ 159 #define SUPPLY_INTERVAL 30 /* time to supply tables */ 160 #define MIN_WAITTIME 2 /* min sec until next flash updates */ 161 #define MAX_WAITTIME 5 /* max sec until flash update */ 162 163 #define STALE_TIME 90 /* switch to a new gateway */ 164 #define EXPIRE_TIME 180 /* time to mark entry invalid */ 165 #define GARBAGE_TIME 240 /* time to garbage collect */ 166 167 #ifdef __cplusplus 168 } 169 #endif 170 #endif /* !_ROUTED_H_ */ 171