1 /* $OpenBSD: ospf.h,v 1.13 2005/12/04 20:56:46 norby Exp $ */ 2 3 /* 4 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org> 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 26 /* misc */ 27 #define OSPF_VERSION 2 28 #define IPPROTO_OSPF 89 29 #define AllSPFRouters "224.0.0.5" 30 #define AllDRouters "224.0.0.6" 31 32 #define PACKET_HDR 100 /* XXX used to calculate the IP payload */ 33 34 #define DEFAULT_METRIC 10 35 #define MIN_METRIC 1 36 #define MAX_METRIC 65535 /* sum & as-ext lsa use 24bit metrics */ 37 38 #define DEFAULT_PRIORITY 1 39 #define MIN_PRIORITY 0 40 #define MAX_PRIORITY 255 41 42 #define DEFAULT_HELLO_INTERVAL 10 43 #define MIN_HELLO_INTERVAL 1 44 #define MAX_HELLO_INTERVAL 65535 45 46 #define DEFAULT_RTR_DEAD_TIME 40 47 #define MIN_RTR_DEAD_TIME 2 48 #define MAX_RTR_DEAD_TIME 2147483647 49 50 #define DEFAULT_RXMT_INTERVAL 5 51 #define MIN_RXMT_INTERVAL 5 52 #define MAX_RXMT_INTERVAL 3600 53 54 #define DEFAULT_TRANSMIT_DELAY 1 55 #define MIN_TRANSMIT_DELAY 1 56 #define MAX_TRANSMIT_DELAY 3600 57 58 #define DEFAULT_ADJ_TMOUT 600 /* XXX sane value? */ 59 60 #define DEFAULT_NBR_TMOUT 86400 /* 24 hours */ 61 62 #define DEFAULT_SPF_DELAY 1 63 #define MIN_SPF_DELAY 1 64 #define MAX_SPF_DELAY 10 65 66 #define DEFAULT_SPF_HOLDTIME 5 67 #define MIN_SPF_HOLDTIME 1 68 #define MAX_SPF_HOLDTIME 5 69 70 #define MIN_MD_ID 0 71 #define MAX_MD_ID 255 72 73 #define MAX_SIMPLE_AUTH_LEN 8 74 75 /* OSPF compatibility flags */ 76 #define OSPF_OPTION_E 0x02 77 #define OSPF_OPTION_MC 0x04 78 #define OSPF_OPTION_NP 0x08 79 #define OSPF_OPTION_EA 0x10 80 #define OSPF_OPTION_DC 0x20 81 82 /* OSPF packet types */ 83 #define PACKET_TYPE_HELLO 1 84 #define PACKET_TYPE_DD 2 85 #define PACKET_TYPE_LS_REQUEST 3 86 #define PACKET_TYPE_LS_UPDATE 4 87 #define PACKET_TYPE_LS_ACK 5 88 89 /* OSPF auth types */ 90 #define AUTH_TYPE_NONE 0 91 #define AUTH_TYPE_SIMPLE 1 92 #define AUTH_TYPE_CRYPT 2 93 94 #define MIN_AUTHTYPE 0 95 #define MAX_AUTHTYPE 2 96 97 /* LSA */ 98 #define LS_REFRESH_TIME 1800 99 #define MIN_LS_INTERVAL 5 100 #define MIN_LS_ARRIVAL 1 101 #define DEFAULT_AGE 0 102 #define MAX_AGE 3600 103 #define CHECK_AGE 300 104 #define MAX_AGE_DIFF 900 105 #define LS_INFINITY 0xffffff 106 #define RESV_SEQ_NUM 0x80000000 /* reserved and "unused" */ 107 #define INIT_SEQ_NUM 0x80000001 108 #define MAX_SEQ_NUM 0x7fffffff 109 110 /* OSPF header */ 111 struct crypt { 112 u_int16_t dummy; 113 u_int8_t keyid; 114 u_int8_t len; 115 u_int32_t seq_num; 116 }; 117 118 struct ospf_hdr { 119 u_int8_t version; 120 u_int8_t type; 121 u_int16_t len; 122 u_int32_t rtr_id; 123 u_int32_t area_id; 124 u_int16_t chksum; 125 u_int16_t auth_type; 126 union { 127 char simple[MAX_SIMPLE_AUTH_LEN]; 128 struct crypt crypt; 129 } auth_key; 130 }; 131 132 /* Hello header (type 1) */ 133 struct hello_hdr { 134 u_int32_t mask; 135 u_int16_t hello_interval; 136 u_int8_t opts; 137 u_int8_t rtr_priority; 138 u_int32_t rtr_dead_interval; 139 u_int32_t d_rtr; 140 u_int32_t bd_rtr; 141 }; 142 143 /* Database Description header (type 2) */ 144 struct db_dscrp_hdr { 145 u_int16_t iface_mtu; 146 u_int8_t opts; 147 u_int8_t bits; 148 u_int32_t dd_seq_num; 149 }; 150 151 #define OSPF_DBD_MS 0x01 152 #define OSPF_DBD_M 0x02 153 #define OSPF_DBD_I 0x04 154 155 /* Link State Request header (type 3) */ 156 struct ls_req_hdr { 157 u_int32_t type; 158 u_int32_t ls_id; 159 u_int32_t adv_rtr; 160 }; 161 162 /* Link State Update header (type 4) */ 163 struct ls_upd_hdr { 164 u_int32_t num_lsa; 165 }; 166 167 #define LSA_TYPE_ROUTER 1 168 #define LSA_TYPE_NETWORK 2 169 #define LSA_TYPE_SUM_NETWORK 3 170 #define LSA_TYPE_SUM_ROUTER 4 171 #define LSA_TYPE_EXTERNAL 5 172 173 #define LINK_TYPE_POINTTOPOINT 1 174 #define LINK_TYPE_TRANSIT_NET 2 175 #define LINK_TYPE_STUB_NET 3 176 #define LINK_TYPE_VIRTUAL 4 177 178 /* LSA headers */ 179 #define LSA_METRIC_MASK 0x00ffffff /* only for sum & as-ext */ 180 #define LSA_ASEXT_E_FLAG 0x80000000 181 182 #define OSPF_RTR_B 0x01 183 #define OSPF_RTR_E 0x02 184 #define OSPF_RTR_V 0x04 185 186 struct lsa_rtr { 187 u_int8_t flags; 188 u_int8_t dummy; 189 u_int16_t nlinks; 190 }; 191 192 struct lsa_rtr_link { 193 u_int32_t id; 194 u_int32_t data; 195 u_int8_t type; 196 u_int8_t num_tos; 197 u_int16_t metric; 198 }; 199 200 struct lsa_net { 201 u_int32_t mask; 202 u_int32_t att_rtr[1]; 203 }; 204 205 struct lsa_net_link { 206 u_int32_t att_rtr; 207 }; 208 209 struct lsa_sum { 210 u_int32_t mask; 211 u_int32_t metric; /* only lower 24 bit */ 212 }; 213 214 struct lsa_asext { 215 u_int32_t mask; 216 u_int32_t metric; /* lower 24 bit plus E bit */ 217 u_int32_t fw_addr; 218 u_int32_t ext_tag; 219 }; 220 221 struct lsa_hdr { 222 u_int16_t age; 223 u_int8_t opts; 224 u_int8_t type; 225 u_int32_t ls_id; 226 u_int32_t adv_rtr; 227 u_int32_t seq_num; 228 u_int16_t ls_chksum; 229 u_int16_t len; 230 }; 231 232 #define LS_CKSUM_OFFSET ((u_int16_t)(&((struct lsa_hdr *)0)->ls_chksum)) 233 234 struct lsa { 235 struct lsa_hdr hdr; 236 union { 237 struct lsa_rtr rtr; 238 struct lsa_net net; 239 struct lsa_sum sum; 240 struct lsa_asext asext; 241 } data; 242 }; 243 244 #endif /* !_OSPF_H_ */ 245