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   1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.15 2004-09-20 14:36:16 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  * | * | O | DC | EA | 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_DC  0x20    /* DC bit: Demand circuit capable */
  45 #define OSPF_OPTION_O   0x40    /* O bit: Opaque LSA capable */
  46
  47 /* ospf_authtype        */
  48 #define OSPF_AUTH_NONE          0       /* No auth-data */
  49 #define OSPF_AUTH_SIMPLE        1       /* Simple password */
  50 #define OSPF_AUTH_MD5           2       /* MD5 authentication */
  51 #define OSPF_AUTH_MD5_LEN       16      /* length of MD5 authentication */
  52
  53 /* db_flags     */
  54 #define OSPF_DB_INIT            0x04        /*  */
  55 #define OSPF_DB_MORE            0x02
  56 #define OSPF_DB_MASTER          0x01
  57
  58 /* ls_type      */
  59 #define LS_TYPE_ROUTER          1   /* router link */
  60 #define LS_TYPE_NETWORK         2   /* network link */
  61 #define LS_TYPE_SUM_IP          3   /* summary link */
  62 #define LS_TYPE_SUM_ABR         4   /* summary area link */
  63 #define LS_TYPE_ASE             5   /* ASE  */
  64 #define LS_TYPE_GROUP           6   /* Group membership (multicast */
  65                                     /* extensions 23 July 1991) */
  66 #define LS_TYPE_NSSA            7   /* rfc3101 - Not so Stubby Areas */
  67 #define LS_TYPE_OPAQUE_LL       9   /* rfc2370 - Opaque Link Local */
  68 #define LS_TYPE_OPAQUE_AL      10   /* rfc2370 - Opaque Link Local */
  69 #define LS_TYPE_OPAQUE_DW      11   /* rfc2370 - Opaque Domain Wide */
  70
  71 #define LS_OPAQUE_TYPE_TE       1   /* rfc3630 */
  72 #define LS_OPAQUE_TYPE_GRACE    3   /* rfc3623 */
  73 #define LS_OPAQUE_TYPE_RI       4   /* draft-ietf-ospf-cap-03 */
  74
  75 #define LS_OPAQUE_TE_TLV_ROUTER 1   /* rfc3630 */
  76 #define LS_OPAQUE_TE_TLV_LINK   2   /* rfc3630 */
  77
  78 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE             1 /* rfc3630 */
  79 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID               2 /* rfc3630 */
  80 #define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP              3 /* rfc3630 */
  81 #define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP             4 /* rfc3630 */
  82 #define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC             5 /* rfc3630 */
  83 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW                6 /* rfc3630 */
  84 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW            7 /* rfc3630 */
  85 #define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW              8 /* rfc3630 */
  86 #define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP           9 /* rfc3630 */
  87 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  88 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  89 #define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR    15 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  90 #define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP    16 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  91 #define LS_OPAQUE_TE_LINK_SUBTLV_DIFFSERV_TE          17 /* draft-ietf-tewg-diff-te-proto-06 */
  92
  93 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP        1  /* rfc3630 */
  94 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA         2  /* rfc3630 */
  95
  96 #define LS_OPAQUE_GRACE_TLV_PERIOD       1 /* rfc3623 */
  97 #define LS_OPAQUE_GRACE_TLV_REASON       2 /* rfc3623 */
  98 #define LS_OPAQUE_GRACE_TLV_INT_ADDRESS  3 /* rfc3623 */
  99
 100 #define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN     0 /* rfc3623 */
 101 #define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART  1 /* rfc3623 */
 102 #define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE  2 /* rfc3623 */
 103 #define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH   3 /* rfc3623 */
 104
 105 #define LS_OPAQUE_RI_TLV_CAP             1 /* draft-ietf-ospf-cap-03 */
 106
 107 /*************************************************
 108  *
 109  * is the above a bug in the documentation?
 110  *
 111  *************************************************/
 112
 113
 114 /* rla_link.link_type   */
 115 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
 116 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
 117 #define RLA_TYPE_STUB           3   /* connection to stub network       */
 118 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
 119
 120 /* rla_flags    */
 121 #define RLA_FLAG_B      0x01
 122 #define RLA_FLAG_E      0x02
 123 #define RLA_FLAG_W1     0x04
 124 #define RLA_FLAG_W2     0x08
 125
 126 /* sla_tosmetric breakdown      */
 127 #define SLA_MASK_TOS            0x7f000000
 128 #define SLA_MASK_METRIC         0x00ffffff
 129 #define SLA_SHIFT_TOS           24
 130
 131 /* asla_tosmetric breakdown     */
 132 #define ASLA_FLAG_EXTERNAL      0x80000000
 133 #define ASLA_MASK_TOS           0x7f000000
 134 #define ASLA_SHIFT_TOS          24
 135 #define ASLA_MASK_METRIC        0x00ffffff
 136
 137 /* multicast vertex type */
 138 #define MCLA_VERTEX_ROUTER      1
 139 #define MCLA_VERTEX_NETWORK     2
 140
 141 /* link state advertisement header */
 142 struct lsa_hdr {
 143     u_int16_t ls_age;
 144     u_int8_t ls_options;
 145     u_int8_t ls_type;
 146     union {
 147         struct in_addr lsa_id;
 148         struct { /* opaque LSAs change the LSA-ID field */
 149             u_int8_t opaque_type;
 150             u_int8_t opaque_id[3];
 151         } opaque_field;
 152     } un_lsa_id;
 153     struct in_addr ls_router;
 154     u_int32_t ls_seq;
 155     u_int16_t ls_chksum;
 156     u_int16_t ls_length;
 157 };
 158
 159 /* link state advertisement */
 160 struct lsa {
 161     struct lsa_hdr ls_hdr;
 162
 163     /* Link state types */
 164     union {
 165         /* Router links advertisements */
 166         struct {
 167             u_int8_t rla_flags;
 168             u_int8_t rla_zero[1];
 169             u_int16_t rla_count;
 170             struct rlalink {
 171                 struct in_addr link_id;
 172                 struct in_addr link_data;
 173                 u_int8_t link_type;
 174                 u_int8_t link_toscount;
 175                 u_int16_t link_tos0metric;
 176             } rla_link[1];              /* may repeat   */
 177         } un_rla;
 178
 179         /* Network links advertisements */
 180         struct {
 181             struct in_addr nla_mask;
 182             struct in_addr nla_router[1];       /* may repeat   */
 183         } un_nla;
 184
 185         /* Summary links advertisements */
 186         struct {
 187             struct in_addr sla_mask;
 188             u_int32_t sla_tosmetric[1]; /* may repeat   */
 189         } un_sla;
 190
 191         /* AS external links advertisements */
 192         struct {
 193             struct in_addr asla_mask;
 194             struct aslametric {
 195                 u_int32_t asla_tosmetric;
 196                 struct in_addr asla_forward;
 197                 struct in_addr asla_tag;
 198             } asla_metric[1];           /* may repeat   */
 199         } un_asla;
 200
 201         /* Multicast group membership */
 202         struct mcla {
 203             u_int32_t mcla_vtype;
 204             struct in_addr mcla_vid;
 205         } un_mcla[1];
 206
 207         /* Opaque TE LSA */
 208         struct {
 209             u_int16_t type;
 210             u_int16_t length;
 211             u_int8_t data[1]; /* may repeat   */
 212         } un_te_lsa_tlv;
 213
 214         /* Opaque Grace LSA */
 215         struct {
 216             u_int16_t type;
 217             u_int16_t length;
 218             u_int8_t data[1]; /* may repeat   */
 219         } un_grace_tlv;
 220
 221         /* Opaque Router information LSA */
 222         struct {
 223             u_int16_t type;
 224             u_int16_t length;
 225             u_int8_t data[1]; /* may repeat   */
 226         } un_ri_tlv;
 227
 228         /* Unknown LSA */
 229         struct unknown {
 230             u_int8_t data[1]; /* may repeat   */
 231         } un_unknown[1];
 232
 233     } lsa_un;
 234 };
 235
 236
 237 /*
 238  * TOS metric struct (will be 0 or more in router links update)
 239  */
 240 struct tos_metric {
 241     u_int8_t tos_type;
 242     u_int8_t tos_zero;
 243     u_int16_t tos_metric;
 244 };
 245
 246 #define OSPF_AUTH_SIZE  8
 247
 248 /*
 249  * the main header
 250  */
 251 struct ospfhdr {
 252     u_int8_t ospf_version;
 253     u_int8_t ospf_type;
 254     u_int16_t ospf_len;
 255     struct in_addr ospf_routerid;
 256     struct in_addr ospf_areaid;
 257     u_int16_t ospf_chksum;
 258     u_int16_t ospf_authtype;
 259     u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
 260     union {
 261
 262         /* Hello packet */
 263         struct {
 264             struct in_addr hello_mask;
 265             u_int16_t hello_helloint;
 266             u_int8_t hello_options;
 267             u_int8_t hello_priority;
 268             u_int32_t hello_deadint;
 269             struct in_addr hello_dr;
 270             struct in_addr hello_bdr;
 271             struct in_addr hello_neighbor[1]; /* may repeat     */
 272         } un_hello;
 273
 274         /* Database Description packet */
 275         struct {
 276             u_int8_t db_zero[2];
 277             u_int8_t db_options;
 278             u_int8_t db_flags;
 279             u_int32_t db_seq;
 280             struct lsa_hdr db_lshdr[1]; /* may repeat   */
 281         } un_db;
 282
 283         /* Link State Request */
 284         struct lsr {
 285             u_int8_t ls_type[4];
 286             union {
 287                 struct in_addr ls_stateid;
 288                 struct { /* opaque LSAs change the LSA-ID field */
 289                     u_int8_t opaque_type;
 290                     u_int8_t opaque_id[3];
 291                 } opaque_field;
 292             } un_ls_stateid;
 293             struct in_addr ls_router;
 294         } un_lsr[1];            /* may repeat   */
 295
 296         /* Link State Update */
 297         struct {
 298             u_int32_t lsu_count;
 299             struct lsa lsu_lsa[1]; /* may repeat        */
 300         } un_lsu;
 301
 302         /* Link State Acknowledgement */
 303         struct {
 304             struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
 305         } un_lsa ;
 306     } ospf_un ;
 307 };
 308
 309 #define ospf_hello      ospf_un.un_hello
 310 #define ospf_db         ospf_un.un_db
 311 #define ospf_lsr        ospf_un.un_lsr
 312 #define ospf_lsu        ospf_un.un_lsu
 313 #define ospf_lsa        ospf_un.un_lsa
 314