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   1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.20 2007-09-23 23:01:33 guy 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 | EA | N/P | MC | E | T |
  35  * +-------------------------------------+
  36  *
  37  * +------------------------------------+
  38  * | DN | O | DC | L | N/P | MC | E | T |
  39  * +------------------------------------+
  40  *
  41  */
  42
  43 #define OSPF_OPTION_T   0x01    /* T bit: TOS support   */
  44 #define OSPF_OPTION_E   0x02    /* E bit: External routes advertised    */
  45 #define OSPF_OPTION_MC  0x04    /* MC bit: Multicast capable */
  46 #define OSPF_OPTION_NP  0x08    /* N/P bit: NSSA capable */
  47 #define OSPF_OPTION_EA  0x10    /* EA bit: External Attribute capable */
  48 #define OSPF_OPTION_L   0x10    /* L bit: Packet contains LLS data block */
  49 #define OSPF_OPTION_DC  0x20    /* DC bit: Demand circuit capable */
  50 #define OSPF_OPTION_O   0x40    /* O bit: Opaque LSA capable */
  51 #define OSPF_OPTION_DN  0x80    /* DN bit: Up/Down Bit capable - draft-ietf-ospf-2547-dnbit-04 */
  52
  53 /* ospf_authtype        */
  54 #define OSPF_AUTH_NONE          0       /* No auth-data */
  55 #define OSPF_AUTH_SIMPLE        1       /* Simple password */
  56 #define OSPF_AUTH_SIMPLE_LEN    8       /* max length of simple authentication */
  57 #define OSPF_AUTH_MD5           2       /* MD5 authentication */
  58 #define OSPF_AUTH_MD5_LEN       16      /* length of MD5 authentication */
  59
  60 /* db_flags     */
  61 #define OSPF_DB_INIT            0x04        /*  */
  62 #define OSPF_DB_MORE            0x02
  63 #define OSPF_DB_MASTER          0x01
  64 #define OSPF_DB_RESYNC          0x08            /* RFC4811 */
  65
  66 /* ls_type      */
  67 #define LS_TYPE_ROUTER          1   /* router link */
  68 #define LS_TYPE_NETWORK         2   /* network link */
  69 #define LS_TYPE_SUM_IP          3   /* summary link */
  70 #define LS_TYPE_SUM_ABR         4   /* summary area link */
  71 #define LS_TYPE_ASE             5   /* ASE  */
  72 #define LS_TYPE_GROUP           6   /* Group membership (multicast */
  73                                     /* extensions 23 July 1991) */
  74 #define LS_TYPE_NSSA            7   /* rfc3101 - Not so Stubby Areas */
  75 #define LS_TYPE_OPAQUE_LL       9   /* rfc2370 - Opaque Link Local */
  76 #define LS_TYPE_OPAQUE_AL      10   /* rfc2370 - Opaque Link Local */
  77 #define LS_TYPE_OPAQUE_DW      11   /* rfc2370 - Opaque Domain Wide */
  78
  79 #define LS_OPAQUE_TYPE_TE       1   /* rfc3630 */
  80 #define LS_OPAQUE_TYPE_GRACE    3   /* rfc3623 */
  81 #define LS_OPAQUE_TYPE_RI       4   /* draft-ietf-ospf-cap-03 */
  82
  83 #define LS_OPAQUE_TE_TLV_ROUTER 1   /* rfc3630 */
  84 #define LS_OPAQUE_TE_TLV_LINK   2   /* rfc3630 */
  85
  86 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE             1 /* rfc3630 */
  87 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID               2 /* rfc3630 */
  88 #define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP              3 /* rfc3630 */
  89 #define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP             4 /* rfc3630 */
  90 #define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC             5 /* rfc3630 */
  91 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW                6 /* rfc3630 */
  92 #define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW            7 /* rfc3630 */
  93 #define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW              8 /* rfc3630 */
  94 #define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP           9 /* rfc3630 */
  95 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* rfc4203 */
  96 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* rfc4203 */
  97 #define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR    15 /* rfc4203 */
  98 #define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP    16 /* rfc4203 */
  99 #define LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS       17 /* rfc4124 */
 100
 101 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP        1  /* rfc3630 */
 102 #define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA         2  /* rfc3630 */
 103
 104 #define LS_OPAQUE_GRACE_TLV_PERIOD       1 /* rfc3623 */
 105 #define LS_OPAQUE_GRACE_TLV_REASON       2 /* rfc3623 */
 106 #define LS_OPAQUE_GRACE_TLV_INT_ADDRESS  3 /* rfc3623 */
 107
 108 #define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN     0 /* rfc3623 */
 109 #define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART  1 /* rfc3623 */
 110 #define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE  2 /* rfc3623 */
 111 #define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH   3 /* rfc3623 */
 112
 113 #define LS_OPAQUE_RI_TLV_CAP             1 /* draft-ietf-ospf-cap-03 */
 114
 115
 116 /* rla_link.link_type   */
 117 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
 118 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
 119 #define RLA_TYPE_STUB           3   /* connection to stub network       */
 120 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
 121
 122 /* rla_flags    */
 123 #define RLA_FLAG_B      0x01
 124 #define RLA_FLAG_E      0x02
 125 #define RLA_FLAG_W1     0x04
 126 #define RLA_FLAG_W2     0x08
 127
 128 /* sla_tosmetric breakdown      */
 129 #define SLA_MASK_TOS            0x7f000000
 130 #define SLA_MASK_METRIC         0x00ffffff
 131 #define SLA_SHIFT_TOS           24
 132
 133 /* asla_tosmetric breakdown     */
 134 #define ASLA_FLAG_EXTERNAL      0x80000000
 135 #define ASLA_MASK_TOS           0x7f000000
 136 #define ASLA_SHIFT_TOS          24
 137 #define ASLA_MASK_METRIC        0x00ffffff
 138
 139 /* multicast vertex type */
 140 #define MCLA_VERTEX_ROUTER      1
 141 #define MCLA_VERTEX_NETWORK     2
 142
 143 /* Link-Local-Signaling */
 144 #define OSPF_LLS_EO             1       /* RFC4811, RFC4812 */
 145 #define OSPF_LLS_MD5    2       /* RFC4813 */
 146
 147 #define OSPF_LLS_EO_LR          0x00000001              /* RFC4811 */
 148 #define OSPF_LLS_EO_RS          0x00000002              /* RFC4812 */
 149
 150
 151 /* link state advertisement header */
 152 struct lsa_hdr {
 153     u_int16_t ls_age;
 154     u_int8_t ls_options;
 155     u_int8_t ls_type;
 156     union {
 157         struct in_addr lsa_id;
 158         struct { /* opaque LSAs change the LSA-ID field */
 159             u_int8_t opaque_type;
 160             u_int8_t opaque_id[3];
 161         } opaque_field;
 162     } un_lsa_id;
 163     struct in_addr ls_router;
 164     u_int32_t ls_seq;
 165     u_int16_t ls_chksum;
 166     u_int16_t ls_length;
 167 };
 168
 169 /* link state advertisement */
 170 struct lsa {
 171     struct lsa_hdr ls_hdr;
 172
 173     /* Link state types */
 174     union {
 175         /* Router links advertisements */
 176         struct {
 177             u_int8_t rla_flags;
 178             u_int8_t rla_zero[1];
 179             u_int16_t rla_count;
 180             struct rlalink {
 181                 struct in_addr link_id;
 182                 struct in_addr link_data;
 183                 u_int8_t link_type;
 184                 u_int8_t link_toscount;
 185                 u_int16_t link_tos0metric;
 186             } rla_link[1];              /* may repeat   */
 187         } un_rla;
 188
 189         /* Network links advertisements */
 190         struct {
 191             struct in_addr nla_mask;
 192             struct in_addr nla_router[1];       /* may repeat   */
 193         } un_nla;
 194
 195         /* Summary links advertisements */
 196         struct {
 197             struct in_addr sla_mask;
 198             u_int32_t sla_tosmetric[1]; /* may repeat   */
 199         } un_sla;
 200
 201         /* AS external links advertisements */
 202         struct {
 203             struct in_addr asla_mask;
 204             struct aslametric {
 205                 u_int32_t asla_tosmetric;
 206                 struct in_addr asla_forward;
 207                 struct in_addr asla_tag;
 208             } asla_metric[1];           /* may repeat   */
 209         } un_asla;
 210
 211         /* Multicast group membership */
 212         struct mcla {
 213             u_int32_t mcla_vtype;
 214             struct in_addr mcla_vid;
 215         } un_mcla[1];
 216
 217         /* Opaque TE LSA */
 218         struct {
 219             u_int16_t type;
 220             u_int16_t length;
 221             u_int8_t data[1]; /* may repeat   */
 222         } un_te_lsa_tlv;
 223
 224         /* Opaque Grace LSA */
 225         struct {
 226             u_int16_t type;
 227             u_int16_t length;
 228             u_int8_t data[1]; /* may repeat   */
 229         } un_grace_tlv;
 230
 231         /* Opaque Router information LSA */
 232         struct {
 233             u_int16_t type;
 234             u_int16_t length;
 235             u_int8_t data[1]; /* may repeat   */
 236         } un_ri_tlv;
 237
 238         /* Unknown LSA */
 239         struct unknown {
 240             u_int8_t data[1]; /* may repeat   */
 241         } un_unknown[1];
 242
 243     } lsa_un;
 244 };
 245
 246
 247 /*
 248  * TOS metric struct (will be 0 or more in router links update)
 249  */
 250 struct tos_metric {
 251     u_int8_t tos_type;
 252     u_int8_t tos_zero;
 253     u_int16_t tos_metric;
 254 };
 255
 256 #define OSPF_AUTH_SIZE  8
 257
 258 /*
 259  * the main header
 260  */
 261 struct ospfhdr {
 262     u_int8_t ospf_version;
 263     u_int8_t ospf_type;
 264     u_int16_t ospf_len;
 265     struct in_addr ospf_routerid;
 266     struct in_addr ospf_areaid;
 267     u_int16_t ospf_chksum;
 268     u_int16_t ospf_authtype;
 269     u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
 270     union {
 271
 272         /* Hello packet */
 273         struct {
 274             struct in_addr hello_mask;
 275             u_int16_t hello_helloint;
 276             u_int8_t hello_options;
 277             u_int8_t hello_priority;
 278             u_int32_t hello_deadint;
 279             struct in_addr hello_dr;
 280             struct in_addr hello_bdr;
 281             struct in_addr hello_neighbor[1]; /* may repeat     */
 282         } un_hello;
 283
 284         /* Database Description packet */
 285         struct {
 286             u_int16_t db_ifmtu;
 287             u_int8_t db_options;
 288             u_int8_t db_flags;
 289             u_int32_t db_seq;
 290             struct lsa_hdr db_lshdr[1]; /* may repeat   */
 291         } un_db;
 292
 293         /* Link State Request */
 294         struct lsr {
 295             u_int8_t ls_type[4];
 296             union {
 297                 struct in_addr ls_stateid;
 298                 struct { /* opaque LSAs change the LSA-ID field */
 299                     u_int8_t opaque_type;
 300                     u_int8_t opaque_id[3];
 301                 } opaque_field;
 302             } un_ls_stateid;
 303             struct in_addr ls_router;
 304         } un_lsr[1];            /* may repeat   */
 305
 306         /* Link State Update */
 307         struct {
 308             u_int32_t lsu_count;
 309             struct lsa lsu_lsa[1]; /* may repeat        */
 310         } un_lsu;
 311
 312         /* Link State Acknowledgement */
 313         struct {
 314             struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
 315         } un_lsa ;
 316     } ospf_un ;
 317 };
 318
 319 #define ospf_hello      ospf_un.un_hello
 320 #define ospf_db         ospf_un.un_db
 321 #define ospf_lsr        ospf_un.un_lsr
 322 #define ospf_lsu        ospf_un.un_lsu
 323 #define ospf_lsa        ospf_un.un_lsa
 324
 325 /* Functions shared by ospf and ospf6 */
 326 extern int ospf_print_te_lsa(u_int8_t *, u_int);
 327 extern int ospf_print_grace_lsa(u_int8_t *, u_int);