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   1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.13 2004-01-27 13:33:24 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   /* rfc1587 - 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
  74 #define LS_OPAQUE_TE_TLV_ROUTER 1   /* rfc3630 */
  75 #define LS_OPAQUE_TE_TLV_LINK   2   /* rfc3630 */
  76
  77 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE             1 /* rfc3630 */
  78 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID               2 /* rfc3630 */
  79 #define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP              3 /* rfc3630 */
  80 #define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP             4 /* rfc3630 */
  81 #define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC             5 /* rfc3630 */
  82 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW                6 /* rfc3630 */
  83 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW            7 /* rfc3630 */
  84 #define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW              8 /* rfc3630 */
  85 #define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP           9 /* rfc3630 */
  86 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  87 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  88 #define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR    15 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  89 #define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP    16 /* draft-ietf-ccamp-ospf-gmpls-extensions */
  90 #define LS_OPAQUE_TE_LINK_SUBTLV_DIFFSERV_TE          17 /* draft-ietf-tewg-diff-te-proto-06 */
  91
  92 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP        1  /* rfc3630 */
  93 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA         2  /* rfc3630 */
  94
  95 #define LS_OPAQUE_GRACE_TLV_PERIOD       1 /* rfc3623 */
  96 #define LS_OPAQUE_GRACE_TLV_REASON       2 /* rfc3623 */
  97 #define LS_OPAQUE_GRACE_TLV_INT_ADDRESS  3 /* rfc3623 */
  98
  99 #define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN     0 /* rfc3623 */
 100 #define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART  1 /* rfc3623 */
 101 #define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE  2 /* rfc3623 */
 102 #define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH   3 /* rfc3623 */
 103
 104 /*************************************************
 105  *
 106  * is the above a bug in the documentation?
 107  *
 108  *************************************************/
 109
 110
 111 /* rla_link.link_type   */
 112 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
 113 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
 114 #define RLA_TYPE_STUB           3   /* connection to stub network       */
 115 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
 116
 117 /* rla_flags    */
 118 #define RLA_FLAG_B      0x01
 119 #define RLA_FLAG_E      0x02
 120 #define RLA_FLAG_W1     0x04
 121 #define RLA_FLAG_W2     0x08
 122
 123 /* sla_tosmetric breakdown      */
 124 #define SLA_MASK_TOS            0x7f000000
 125 #define SLA_MASK_METRIC         0x00ffffff
 126 #define SLA_SHIFT_TOS           24
 127
 128 /* asla_tosmetric breakdown     */
 129 #define ASLA_FLAG_EXTERNAL      0x80000000
 130 #define ASLA_MASK_TOS           0x7f000000
 131 #define ASLA_SHIFT_TOS          24
 132 #define ASLA_MASK_METRIC        0x00ffffff
 133
 134 /* multicast vertex type */
 135 #define MCLA_VERTEX_ROUTER      1
 136 #define MCLA_VERTEX_NETWORK     2
 137
 138 /* link state advertisement header */
 139 struct lsa_hdr {
 140     u_int16_t ls_age;
 141     u_int8_t ls_options;
 142     u_int8_t ls_type;
 143     union {
 144         struct in_addr lsa_id;
 145         struct { /* opaque LSAs change the LSA-ID field */
 146             u_int8_t opaque_type;
 147             u_int8_t opaque_id[3];
 148         } opaque_field;
 149     } un_lsa_id;
 150     struct in_addr ls_router;
 151     u_int32_t ls_seq;
 152     u_int16_t ls_chksum;
 153     u_int16_t ls_length;
 154 };
 155
 156 /* link state advertisement */
 157 struct lsa {
 158     struct lsa_hdr ls_hdr;
 159
 160     /* Link state types */
 161     union {
 162         /* Router links advertisements */
 163         struct {
 164             u_int8_t rla_flags;
 165             u_int8_t rla_zero[1];
 166             u_int16_t rla_count;
 167             struct rlalink {
 168                 struct in_addr link_id;
 169                 struct in_addr link_data;
 170                 u_int8_t link_type;
 171                 u_int8_t link_toscount;
 172                 u_int16_t link_tos0metric;
 173             } rla_link[1];              /* may repeat   */
 174         } un_rla;
 175
 176         /* Network links advertisements */
 177         struct {
 178             struct in_addr nla_mask;
 179             struct in_addr nla_router[1];       /* may repeat   */
 180         } un_nla;
 181
 182         /* Summary links advertisements */
 183         struct {
 184             struct in_addr sla_mask;
 185             u_int32_t sla_tosmetric[1]; /* may repeat   */
 186         } un_sla;
 187
 188         /* AS external links advertisements */
 189         struct {
 190             struct in_addr asla_mask;
 191             struct aslametric {
 192                 u_int32_t asla_tosmetric;
 193                 struct in_addr asla_forward;
 194                 struct in_addr asla_tag;
 195             } asla_metric[1];           /* may repeat   */
 196         } un_asla;
 197
 198         /* Multicast group membership */
 199         struct mcla {
 200             u_int32_t mcla_vtype;
 201             struct in_addr mcla_vid;
 202         } un_mcla[1];
 203
 204         /* Opaque TE LSA */
 205         struct {
 206             u_int16_t type;
 207             u_int16_t length;
 208             u_int8_t data[1]; /* may repeat   */
 209         } un_te_lsa_tlv;
 210
 211         /* Grace LSA */
 212         struct {
 213             u_int16_t type;
 214             u_int16_t length;
 215             u_int8_t data[1]; /* may repeat   */
 216         } un_grace_tlv;
 217
 218         /* Unknown LSA */
 219         struct unknown {
 220             u_int8_t data[1]; /* may repeat   */
 221         } un_unknown[1];
 222
 223     } lsa_un;
 224 };
 225
 226
 227 /*
 228  * TOS metric struct (will be 0 or more in router links update)
 229  */
 230 struct tos_metric {
 231     u_int8_t tos_type;
 232     u_int8_t tos_zero;
 233     u_int16_t tos_metric;
 234 };
 235
 236 #define OSPF_AUTH_SIZE  8
 237
 238 /*
 239  * the main header
 240  */
 241 struct ospfhdr {
 242     u_int8_t ospf_version;
 243     u_int8_t ospf_type;
 244     u_int16_t ospf_len;
 245     struct in_addr ospf_routerid;
 246     struct in_addr ospf_areaid;
 247     u_int16_t ospf_chksum;
 248     u_int16_t ospf_authtype;
 249     u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
 250     union {
 251
 252         /* Hello packet */
 253         struct {
 254             struct in_addr hello_mask;
 255             u_int16_t hello_helloint;
 256             u_int8_t hello_options;
 257             u_int8_t hello_priority;
 258             u_int32_t hello_deadint;
 259             struct in_addr hello_dr;
 260             struct in_addr hello_bdr;
 261             struct in_addr hello_neighbor[1]; /* may repeat     */
 262         } un_hello;
 263
 264         /* Database Description packet */
 265         struct {
 266             u_int8_t db_zero[2];
 267             u_int8_t db_options;
 268             u_int8_t db_flags;
 269             u_int32_t db_seq;
 270             struct lsa_hdr db_lshdr[1]; /* may repeat   */
 271         } un_db;
 272
 273         /* Link State Request */
 274         struct lsr {
 275             u_int8_t ls_type[4];
 276             union {
 277                 struct in_addr ls_stateid;
 278                 struct { /* opaque LSAs change the LSA-ID field */
 279                     u_int8_t opaque_type;
 280                     u_int8_t opaque_id[3];
 281                 } opaque_field;
 282             } un_ls_stateid;
 283             struct in_addr ls_router;
 284         } un_lsr[1];            /* may repeat   */
 285
 286         /* Link State Update */
 287         struct {
 288             u_int32_t lsu_count;
 289             struct lsa lsu_lsa[1]; /* may repeat        */
 290         } un_lsu;
 291
 292         /* Link State Acknowledgement */
 293         struct {
 294             struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
 295         } un_lsa ;
 296     } ospf_un ;
 297 };
 298
 299 #define ospf_hello      ospf_un.un_hello
 300 #define ospf_db         ospf_un.un_db
 301 #define ospf_lsr        ospf_un.un_lsr
 302 #define ospf_lsu        ospf_un.un_lsu
 303 #define ospf_lsa        ospf_un.un_lsa
 304