1 /* $OpenBSD: ospf.h,v 1.1 2005/01/28 14:05:40 claudio Exp $ */ 2 3 /* 4 * Copyright (c) 2004, 2005 Esben Norby <esben.norby@ericsson.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* OSPF protocol definitions */ 20 21 #ifndef _OSPF_H_ 22 #define _OSPF_H_ 23 24 #include <netinet/in.h> 25 #include <stdbool.h> 26 27 /* misc */ 28 #define OSPF_VERSION 2 29 #define IPPROTO_OSPF 89 30 #define AllSPFRouters "224.0.0.5" 31 #define AllDRouters "224.0.0.6" 32 33 #define PACKET_HDR 100 /* XXX used to calculate the IP payload */ 34 35 #define DEFAULT_METRIC 1 36 #define MIN_METRIC 1 37 #define MAX_METRIC 65535 38 39 #define DEFAULT_PRIORITY 0 /* XXX force to 0 for now */ 40 #define MIN_PRIORITY 0 41 #define MAX_PRIORITY 255 42 43 #define DEFAULT_HELLO_INTERVAL 10 44 #define MIN_HELLO_INTERVAL 1 45 #define MAX_HELLO_INTERVAL 65535 46 47 #define DEFAULT_RTR_DEAD_TIME 40 48 #define MIN_RTR_DEAD_TIME 2 49 #define MAX_RTR_DEAD_TIME 2147483647 50 51 #define DEFAULT_RXMT_INTERVAL 5 52 #define MIN_RXMT_INTERVAL 5 53 #define MAX_RXMT_INTERVAL 3600 54 55 #define DEFAULT_TRANSIT_DELAY 1 56 #define MIN_TRANSIT_DELAY 1 57 #define MAX_TRANSIT_DELAY 3600 58 59 #define DEFAULT_ADJ_TMOUT 60 /* XXX sane value? */ 60 61 /* OSPF compatibility flags */ 62 #define OSPF_OPTION_E 0x02 63 #define OSPF_OPTION_MC 0x04 64 #define OSPF_OPTION_NP 0x08 65 #define OSPF_OPTION_EA 0x10 66 #define OSPF_OPTION_DC 0x20 67 68 /* OSPF packet types */ 69 #define PACKET_TYPE_HELLO 1 70 #define PACKET_TYPE_DD 2 71 #define PACKET_TYPE_LS_REQUEST 3 72 #define PACKET_TYPE_LS_UPDATE 4 73 #define PACKET_TYPE_LS_ACK 5 74 75 /* OSPF auth types */ 76 #define AUTH_TYPE_NONE 0 77 #define AUTH_TYPE_SIMPLE 1 78 #define AUTH_TYPE_CRYPT 2 79 80 #define MIN_AUTHTYPE 0 81 #define MAX_AUTHTYPE 2 82 83 /* LSA */ 84 #define LS_REFRESH_TIME 1800 85 #define MIN_LS_INTERVAL 5 86 #define MIN_LS_ARRIVAL 1 87 #define DEFAULT_AGE 0 88 #define MAX_AGE 3600 89 #define CHECK_AGE 300 90 #define MAX_AGE_DIFF 900 91 #define LS_INFINITY 0xffffff 92 #define INIT_SEQ_NUM 0x80000001 93 #define MAX_SEQ_NUM 0x7fffffff 94 95 /* OSPF header */ 96 struct ospf_hdr { 97 u_int8_t version; 98 u_int8_t type; 99 u_int16_t len; 100 u_int32_t rtr_id; 101 u_int32_t area_id; 102 u_int16_t chksum; 103 u_int16_t auth_type; 104 union { 105 char simple[8]; 106 u_int64_t crypt; 107 } auth_key; 108 }; 109 110 /* Hello header (type 1) */ 111 struct hello_hdr { 112 u_int32_t mask; 113 u_int16_t hello_interval; 114 u_int8_t opts; 115 u_int8_t rtr_priority; 116 u_int32_t rtr_dead_interval; 117 u_int32_t d_rtr; 118 u_int32_t bd_rtr; 119 }; 120 121 /* Database Description header (type 2) */ 122 struct db_dscrp_hdr { 123 u_int16_t iface_mtu; 124 u_int8_t opts; 125 u_int8_t bits; 126 u_int32_t dd_seq_num; 127 }; 128 129 #define OSPF_DBD_MS 0x01 130 #define OSPF_DBD_M 0x02 131 #define OSPF_DBD_I 0x04 132 133 /* Link State Request header (type 3) */ 134 struct ls_req_hdr { 135 u_int32_t type; 136 u_int32_t ls_id; 137 u_int32_t adv_rtr; 138 }; 139 140 /* Link State Update header (type 4) */ 141 struct ls_upd_hdr { 142 u_int32_t num_lsa; 143 }; 144 145 #define LSA_TYPE_ROUTER 1 146 #define LSA_TYPE_NETWORK 2 147 #define LSA_TYPE_SUM_NETWORK 3 148 #define LSA_TYPE_SUM_ROUTER 4 149 #define LSA_TYPE_EXTERNAL 5 150 151 #define LINK_TYPE_POINTTOPOINT 1 152 #define LINK_TYPE_TRANSIT_NET 2 153 #define LINK_TYPE_STUB_NET 3 154 #define LINK_TYPE_VIRTUAL 4 155 156 /* LSA headers */ 157 struct lsa_rtr { 158 u_int8_t flags; 159 u_int8_t dummy; 160 u_int16_t nlinks; 161 }; 162 163 struct lsa_rtr_link { 164 u_int32_t id; 165 u_int32_t data; 166 u_int8_t type; 167 u_int8_t num_tos; 168 u_int16_t metric; 169 }; 170 171 struct lsa_net { 172 u_int32_t mask; 173 u_int32_t att_rtr[1]; 174 }; 175 176 struct lsa_sum { 177 u_int32_t mask; 178 u_int32_t metric; /* only lower 24 bit */ 179 }; 180 181 struct lsa_hdr { 182 u_int16_t age; 183 u_int8_t opts; 184 u_int8_t type; 185 u_int32_t ls_id; 186 u_int32_t adv_rtr; 187 int32_t seq_num; 188 u_int16_t ls_chksum; 189 u_int16_t len; 190 }; 191 192 #define LS_CKSUM_OFFSET ((u_int16_t)(&((struct lsa_hdr *)0)->ls_chksum)) 193 194 struct lsa { 195 struct lsa_hdr hdr; 196 union { 197 struct lsa_rtr rtr; 198 struct lsa_net net; 199 struct lsa_sum sum; 200 } data; 201 }; 202 203 #endif /* !_OSPF_H_ */ 204