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   1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.3 2000-12-17 23:07:50 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_DB    2       /* Database Description */
  27 #define OSPF_TYPE_LSR   3       /* Link State Request */
  28 #define OSPF_TYPE_LSU   4       /* Link State Update */
  29 #define OSPF_TYPE_LSA   5       /* Link State Ack */
  30 #define OSPF_TYPE_MAX   6
  31
  32 /* Options *_options    */
  33 #define OSPF_OPTION_T   0x01    /* T bit: TOS support   */
  34 #define OSPF_OPTION_E   0x02    /* E bit: External routes advertised    */
  35 #define OSPF_OPTION_MC  0x04    /* MC bit: Multicast capable */
  36
  37 /* ospf_authtype        */
  38 #define OSPF_AUTH_NONE          0       /* No auth-data */
  39 #define OSPF_AUTH_SIMPLE        1       /* Simple password */
  40 #define OSPF_AUTH_MD5           2       /* MD5 authentication */
  41 #define     OSPF_AUTH_MD5_LEN   16      /* length of MD5 authentication */
  42
  43
  44 /* db_flags     */
  45 #define OSPF_DB_INIT            0x04        /*  */
  46 #define OSPF_DB_MORE            0x02
  47 #define OSPF_DB_MASTER          0x01
  48
  49 /* ls_type      */
  50 #define LS_TYPE_ROUTER          1   /* router link */
  51 #define LS_TYPE_NETWORK         2   /* network link */
  52 #define LS_TYPE_SUM_IP          3   /* summary link */
  53 #define LS_TYPE_SUM_ABR         4   /* summary area link */
  54 #define LS_TYPE_ASE             5   /* ASE  */
  55 #define LS_TYPE_GROUP           6   /* Group membership (multicast */
  56                                     /* extensions 23 July 1991) */
  57 #define LS_TYPE_MAX             7
  58
  59 /*************************************************
  60  *
  61  * is the above a bug in the documentation?
  62  *
  63  *************************************************/
  64
  65
  66 /* rla_link.link_type   */
  67 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
  68 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
  69 #define RLA_TYPE_STUB           3   /* connection to stub network       */
  70 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
  71
  72 /* rla_flags    */
  73 #define RLA_FLAG_B      0x01
  74 #define RLA_FLAG_E      0x02
  75 #define RLA_FLAG_W1     0x04
  76 #define RLA_FLAG_W2     0x08
  77
  78 /* sla_tosmetric breakdown      */
  79 #define SLA_MASK_TOS            0x7f000000
  80 #define SLA_MASK_METRIC         0x00ffffff
  81 #define SLA_SHIFT_TOS           24
  82
  83 /* asla_tosmetric breakdown     */
  84 #define ASLA_FLAG_EXTERNAL      0x80000000
  85 #define ASLA_MASK_TOS           0x7f000000
  86 #define ASLA_SHIFT_TOS          24
  87 #define ASLA_MASK_METRIC        0x00ffffff
  88
  89 /* multicast vertex type */
  90 #define MCLA_VERTEX_ROUTER      1
  91 #define MCLA_VERTEX_NETWORK     2
  92
  93 /* link state advertisement header */
  94 struct lsa_hdr {
  95     u_int16_t ls_age;
  96     u_int8_t ls_options;
  97     u_int8_t ls_type;
  98     struct in_addr ls_stateid;
  99     struct in_addr ls_router;
 100     u_int32_t ls_seq;
 101     u_int16_t ls_chksum;
 102     u_int16_t ls_length;
 103 } ;
 104
 105 /* link state advertisement */
 106 struct lsa {
 107     struct lsa_hdr ls_hdr;
 108
 109     /* Link state types */
 110     union {
 111         /* Router links advertisements */
 112         struct {
 113             u_int8_t rla_flags;
 114             u_int8_t rla_zero[1];
 115             u_int16_t rla_count;
 116             struct rlalink {
 117                 struct in_addr link_id;
 118                 struct in_addr link_data;
 119                 u_int8_t link_type;
 120                 u_int8_t link_toscount;
 121                 u_int16_t link_tos0metric;
 122             } rla_link[1];              /* may repeat   */
 123         } un_rla;
 124
 125         /* Network links advertisements */
 126         struct {
 127             struct in_addr nla_mask;
 128             struct in_addr nla_router[1];       /* may repeat   */
 129         } un_nla;
 130
 131         /* Summary links advertisements */
 132         struct {
 133             struct in_addr sla_mask;
 134             u_int32_t sla_tosmetric[1]; /* may repeat   */
 135         } un_sla;
 136
 137         /* AS external links advertisements */
 138         struct {
 139             struct in_addr asla_mask;
 140             struct aslametric {
 141                 u_int32_t asla_tosmetric;
 142                 struct in_addr asla_forward;
 143                 struct in_addr asla_tag;
 144             } asla_metric[1];           /* may repeat   */
 145         } un_asla;
 146
 147         /* Multicast group membership */
 148         struct mcla {
 149             u_int32_t mcla_vtype;
 150             struct in_addr mcla_vid;
 151         } un_mcla[1];
 152     } lsa_un;
 153 } ;
 154
 155
 156 /*
 157  * TOS metric struct (will be 0 or more in router links update)
 158  */
 159 struct tos_metric {
 160     u_int8_t tos_type;
 161     u_int8_t tos_zero;
 162     u_int16_t tos_metric;
 163 } ;
 164
 165 #define OSPF_AUTH_SIZE  8
 166
 167 /*
 168  * the main header
 169  */
 170 struct ospfhdr {
 171     u_int8_t ospf_version;
 172     u_int8_t ospf_type;
 173     u_int16_t ospf_len;
 174     struct in_addr ospf_routerid;
 175     struct in_addr ospf_areaid;
 176     u_int16_t ospf_chksum;
 177     u_int16_t ospf_authtype;
 178     u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
 179     union {
 180
 181         /* Hello packet */
 182         struct {
 183             struct in_addr hello_mask;
 184             u_int16_t hello_helloint;
 185             u_int8_t hello_options;
 186             u_int8_t hello_priority;
 187             u_int32_t hello_deadint;
 188             struct in_addr hello_dr;
 189             struct in_addr hello_bdr;
 190             struct in_addr hello_neighbor[1]; /* may repeat     */
 191         } un_hello;
 192
 193         /* Database Description packet */
 194         struct {
 195             u_int8_t db_zero[2];
 196             u_int8_t db_options;
 197             u_int8_t db_flags;
 198             u_int32_t db_seq;
 199             struct lsa_hdr db_lshdr[1]; /* may repeat   */
 200         } un_db;
 201
 202         /* Link State Request */
 203         struct lsr {
 204             u_int32_t ls_type;
 205             struct in_addr ls_stateid;
 206             struct in_addr ls_router;
 207         } un_lsr[1];            /* may repeat   */
 208
 209         /* Link State Update */
 210         struct {
 211             u_int32_t lsu_count;
 212             struct lsa lsu_lsa[1]; /* may repeat        */
 213         } un_lsu;
 214
 215         /* Link State Acknowledgement */
 216         struct {
 217             struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
 218         } un_lsa ;
 219     } ospf_un ;
 220 } ;
 221
 222 #define ospf_hello      ospf_un.un_hello
 223 #define ospf_db         ospf_un.un_db
 224 #define ospf_lsr        ospf_un.un_lsr
 225 #define ospf_lsu        ospf_un.un_lsu
 226 #define ospf_lsa        ospf_un.un_lsa
 227