1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.23 2007-10-08 07:53:21 hannes Exp $ (LBL) */ 2 /* 3 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that: (1) source code distributions 8 * retain the above copyright notice and this paragraph in its entirety, (2) 9 * distributions including binary code include the above copyright notice and 10 * this paragraph in its entirety in the documentation or other materials 11 * provided with the distribution, and (3) all advertising materials mentioning 12 * features or use of this software display the following acknowledgement: 13 * ``This product includes software developed by the University of California, 14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 15 * the University nor the names of its contributors may be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 * 22 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu) 23 */ 24 #define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */ 25 #define OSPF_TYPE_HELLO 1 /* Hello */ 26 #define OSPF_TYPE_DD 2 /* Database Description */ 27 #define OSPF_TYPE_LS_REQ 3 /* Link State Request */ 28 #define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */ 29 #define OSPF_TYPE_LS_ACK 5 /* Link State Ack */ 30 31 /* Options field 32 * 33 * +------------------------------------+ 34 * | DN | O | DC | L | N/P | MC | E | T | 35 * +------------------------------------+ 36 * 37 */ 38 39 #define OSPF_OPTION_T 0x01 /* T bit: TOS support */ 40 #define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */ 41 #define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */ 42 #define OSPF_OPTION_NP 0x08 /* N/P bit: NSSA capable */ 43 #define OSPF_OPTION_EA 0x10 /* EA bit: External Attribute capable */ 44 #define OSPF_OPTION_L 0x10 /* L bit: Packet contains LLS data block */ 45 #define OSPF_OPTION_DC 0x20 /* DC bit: Demand circuit capable */ 46 #define OSPF_OPTION_O 0x40 /* O bit: Opaque LSA capable */ 47 #define OSPF_OPTION_DN 0x80 /* DN bit: Up/Down Bit capable - draft-ietf-ospf-2547-dnbit-04 */ 48 49 /* ospf_authtype */ 50 #define OSPF_AUTH_NONE 0 /* No auth-data */ 51 #define OSPF_AUTH_SIMPLE 1 /* Simple password */ 52 #define OSPF_AUTH_SIMPLE_LEN 8 /* max length of simple authentication */ 53 #define OSPF_AUTH_MD5 2 /* MD5 authentication */ 54 #define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */ 55 56 /* db_flags */ 57 #define OSPF_DB_INIT 0x04 58 #define OSPF_DB_MORE 0x02 59 #define OSPF_DB_MASTER 0x01 60 #define OSPF_DB_RESYNC 0x08 /* RFC4811 */ 61 62 /* ls_type */ 63 #define LS_TYPE_ROUTER 1 /* router link */ 64 #define LS_TYPE_NETWORK 2 /* network link */ 65 #define LS_TYPE_SUM_IP 3 /* summary link */ 66 #define LS_TYPE_SUM_ABR 4 /* summary area link */ 67 #define LS_TYPE_ASE 5 /* ASE */ 68 #define LS_TYPE_GROUP 6 /* Group membership (multicast */ 69 /* extensions 23 July 1991) */ 70 #define LS_TYPE_NSSA 7 /* rfc3101 - Not so Stubby Areas */ 71 #define LS_TYPE_OPAQUE_LL 9 /* rfc2370 - Opaque Link Local */ 72 #define LS_TYPE_OPAQUE_AL 10 /* rfc2370 - Opaque Link Local */ 73 #define LS_TYPE_OPAQUE_DW 11 /* rfc2370 - Opaque Domain Wide */ 74 75 #define LS_OPAQUE_TYPE_TE 1 /* rfc3630 */ 76 #define LS_OPAQUE_TYPE_GRACE 3 /* rfc3623 */ 77 #define LS_OPAQUE_TYPE_RI 4 /* draft-ietf-ospf-cap-03 */ 78 79 #define LS_OPAQUE_TE_TLV_ROUTER 1 /* rfc3630 */ 80 #define LS_OPAQUE_TE_TLV_LINK 2 /* rfc3630 */ 81 82 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE 1 /* rfc3630 */ 83 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID 2 /* rfc3630 */ 84 #define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP 3 /* rfc3630 */ 85 #define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP 4 /* rfc3630 */ 86 #define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC 5 /* rfc3630 */ 87 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW 6 /* rfc3630 */ 88 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW 7 /* rfc3630 */ 89 #define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW 8 /* rfc3630 */ 90 #define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP 9 /* rfc3630 */ 91 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* rfc4203 */ 92 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* rfc4203 */ 93 #define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR 15 /* rfc4203 */ 94 #define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP 16 /* rfc4203 */ 95 #define LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS 17 /* rfc4124 */ 96 97 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP 1 /* rfc3630 */ 98 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA 2 /* rfc3630 */ 99 100 #define LS_OPAQUE_GRACE_TLV_PERIOD 1 /* rfc3623 */ 101 #define LS_OPAQUE_GRACE_TLV_REASON 2 /* rfc3623 */ 102 #define LS_OPAQUE_GRACE_TLV_INT_ADDRESS 3 /* rfc3623 */ 103 104 #define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN 0 /* rfc3623 */ 105 #define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART 1 /* rfc3623 */ 106 #define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE 2 /* rfc3623 */ 107 #define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH 3 /* rfc3623 */ 108 109 #define LS_OPAQUE_RI_TLV_CAP 1 /* draft-ietf-ospf-cap-03 */ 110 111 112 /* rla_link.link_type */ 113 #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */ 114 #define RLA_TYPE_TRANSIT 2 /* connection to transit network */ 115 #define RLA_TYPE_STUB 3 /* connection to stub network */ 116 #define RLA_TYPE_VIRTUAL 4 /* virtual link */ 117 118 /* rla_flags */ 119 #define RLA_FLAG_B 0x01 120 #define RLA_FLAG_E 0x02 121 #define RLA_FLAG_W1 0x04 122 #define RLA_FLAG_W2 0x08 123 124 /* sla_tosmetric breakdown */ 125 #define SLA_MASK_TOS 0x7f000000 126 #define SLA_MASK_METRIC 0x00ffffff 127 #define SLA_SHIFT_TOS 24 128 129 /* asla_tosmetric breakdown */ 130 #define ASLA_FLAG_EXTERNAL 0x80000000 131 #define ASLA_MASK_TOS 0x7f000000 132 #define ASLA_SHIFT_TOS 24 133 #define ASLA_MASK_METRIC 0x00ffffff 134 135 /* multicast vertex type */ 136 #define MCLA_VERTEX_ROUTER 1 137 #define MCLA_VERTEX_NETWORK 2 138 139 /* Link-Local-Signaling */ 140 #define OSPF_LLS_EO 1 /* RFC4811, RFC4812 */ 141 #define OSPF_LLS_MD5 2 /* RFC4813 */ 142 143 #define OSPF_LLS_EO_LR 0x00000001 /* RFC4811 */ 144 #define OSPF_LLS_EO_RS 0x00000002 /* RFC4812 */ 145 146 /* 147 * TOS metric struct (will be 0 or more in router links update) 148 */ 149 struct tos_metric { 150 u_int8_t tos_type; 151 u_int8_t reserved; 152 u_int8_t tos_metric[2]; 153 }; 154 struct tos_link { 155 u_int8_t link_type; 156 u_int8_t link_tos_count; 157 u_int8_t tos_metric[2]; 158 }; 159 union un_tos { 160 struct tos_link link; 161 struct tos_metric metrics; 162 }; 163 164 /* link state advertisement header */ 165 struct lsa_hdr { 166 u_int16_t ls_age; 167 u_int8_t ls_options; 168 u_int8_t ls_type; 169 union { 170 struct in_addr lsa_id; 171 struct { /* opaque LSAs change the LSA-ID field */ 172 u_int8_t opaque_type; 173 u_int8_t opaque_id[3]; 174 } opaque_field; 175 } un_lsa_id; 176 struct in_addr ls_router; 177 u_int32_t ls_seq; 178 u_int16_t ls_chksum; 179 u_int16_t ls_length; 180 }; 181 182 /* link state advertisement */ 183 struct lsa { 184 struct lsa_hdr ls_hdr; 185 186 /* Link state types */ 187 union { 188 /* Router links advertisements */ 189 struct { 190 u_int8_t rla_flags; 191 u_int8_t rla_zero[1]; 192 u_int16_t rla_count; 193 struct rlalink { 194 struct in_addr link_id; 195 struct in_addr link_data; 196 union un_tos un_tos; 197 } rla_link[1]; /* may repeat */ 198 } un_rla; 199 200 /* Network links advertisements */ 201 struct { 202 struct in_addr nla_mask; 203 struct in_addr nla_router[1]; /* may repeat */ 204 } un_nla; 205 206 /* Summary links advertisements */ 207 struct { 208 struct in_addr sla_mask; 209 u_int32_t sla_tosmetric[1]; /* may repeat */ 210 } un_sla; 211 212 /* AS external links advertisements */ 213 struct { 214 struct in_addr asla_mask; 215 struct aslametric { 216 u_int32_t asla_tosmetric; 217 struct in_addr asla_forward; 218 struct in_addr asla_tag; 219 } asla_metric[1]; /* may repeat */ 220 } un_asla; 221 222 /* Multicast group membership */ 223 struct mcla { 224 u_int32_t mcla_vtype; 225 struct in_addr mcla_vid; 226 } un_mcla[1]; 227 228 /* Opaque TE LSA */ 229 struct { 230 u_int16_t type; 231 u_int16_t length; 232 u_int8_t data[1]; /* may repeat */ 233 } un_te_lsa_tlv; 234 235 /* Opaque Grace LSA */ 236 struct { 237 u_int16_t type; 238 u_int16_t length; 239 u_int8_t data[1]; /* may repeat */ 240 } un_grace_tlv; 241 242 /* Opaque Router information LSA */ 243 struct { 244 u_int16_t type; 245 u_int16_t length; 246 u_int8_t data[1]; /* may repeat */ 247 } un_ri_tlv; 248 249 /* Unknown LSA */ 250 struct unknown { 251 u_int8_t data[1]; /* may repeat */ 252 } un_unknown[1]; 253 254 } lsa_un; 255 }; 256 257 #define OSPF_AUTH_SIZE 8 258 259 /* 260 * the main header 261 */ 262 struct ospfhdr { 263 u_int8_t ospf_version; 264 u_int8_t ospf_type; 265 u_int16_t ospf_len; 266 struct in_addr ospf_routerid; 267 struct in_addr ospf_areaid; 268 u_int16_t ospf_chksum; 269 u_int16_t ospf_authtype; 270 u_int8_t ospf_authdata[OSPF_AUTH_SIZE]; 271 union { 272 273 /* Hello packet */ 274 struct { 275 struct in_addr hello_mask; 276 u_int16_t hello_helloint; 277 u_int8_t hello_options; 278 u_int8_t hello_priority; 279 u_int32_t hello_deadint; 280 struct in_addr hello_dr; 281 struct in_addr hello_bdr; 282 struct in_addr hello_neighbor[1]; /* may repeat */ 283 } un_hello; 284 285 /* Database Description packet */ 286 struct { 287 u_int16_t db_ifmtu; 288 u_int8_t db_options; 289 u_int8_t db_flags; 290 u_int32_t db_seq; 291 struct lsa_hdr db_lshdr[1]; /* may repeat */ 292 } un_db; 293 294 /* Link State Request */ 295 struct lsr { 296 u_int8_t ls_type[4]; 297 union { 298 struct in_addr ls_stateid; 299 struct { /* opaque LSAs change the LSA-ID field */ 300 u_int8_t opaque_type; 301 u_int8_t opaque_id[3]; 302 } opaque_field; 303 } un_ls_stateid; 304 struct in_addr ls_router; 305 } un_lsr[1]; /* may repeat */ 306 307 /* Link State Update */ 308 struct { 309 u_int32_t lsu_count; 310 struct lsa lsu_lsa[1]; /* may repeat */ 311 } un_lsu; 312 313 /* Link State Acknowledgement */ 314 struct { 315 struct lsa_hdr lsa_lshdr[1]; /* may repeat */ 316 } un_lsa ; 317 } ospf_un ; 318 }; 319 320 #define ospf_hello ospf_un.un_hello 321 #define ospf_db ospf_un.un_db 322 #define ospf_lsr ospf_un.un_lsr 323 #define ospf_lsu ospf_un.un_lsu 324 #define ospf_lsa ospf_un.un_lsa 325 326 /* Functions shared by ospf and ospf6 */ 327 extern int ospf_print_te_lsa(const u_int8_t *, u_int); 328 extern int ospf_print_grace_lsa(const u_int8_t *, u_int); 329