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   1 /*
   2  * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
  22  */
  23 #define OSPF_TYPE_UMD   0       /* UMd's special monitoring packets */
  24 #define OSPF_TYPE_HELLO 1       /* Hello */
  25 #define OSPF_TYPE_DB    2       /* Database Description */
  26 #define OSPF_TYPE_LSR   3       /* Link State Request */
  27 #define OSPF_TYPE_LSU   4       /* Link State Update */
  28 #define OSPF_TYPE_LSA   5       /* Link State Ack */
  29 #define OSPF_TYPE_MAX   6
  30
  31 /* Options *_options    */
  32 #define OSPF6_OPTION_V6 0x01    /* V6 bit: A bit for peeping tom */
  33 #define OSPF6_OPTION_E  0x02    /* E bit: External routes advertised    */
  34 #define OSPF6_OPTION_MC 0x04    /* MC bit: Multicast capable */
  35 #define OSPF6_OPTION_N  0x08    /* N bit: For type-7 LSA */
  36 #define OSPF6_OPTION_R  0x10    /* R bit: Router bit */
  37 #define OSPF6_OPTION_DC 0x20    /* DC bit: Demand circuits */
  38
  39
  40 /* db_flags     */
  41 #define OSPF6_DB_INIT           0x04        /*  */
  42 #define OSPF6_DB_MORE           0x02
  43 #define OSPF6_DB_MASTER         0x01
  44
  45 /* ls_type      */
  46 #define LS_TYPE_ROUTER          1   /* router link */
  47 #define LS_TYPE_NETWORK         2   /* network link */
  48 #define LS_TYPE_INTER_AP        3   /* Inter-Area-Prefix */
  49 #define LS_TYPE_INTER_AR        4   /* Inter-Area-Router */
  50 #define LS_TYPE_ASE             5   /* ASE */
  51 #define LS_TYPE_GROUP           6   /* Group membership */
  52 #define LS_TYPE_TYPE7           7   /* Type 7 LSA */
  53 #define LS_TYPE_LINK            8   /* Link LSA */
  54 #define LS_TYPE_INTRA_AP        9   /* Intra-Area-Prefix */
  55 #define LS_TYPE_MAX             10
  56 #define LS_TYPE_MASK            0x1fff
  57
  58 #define LS_SCOPE_LINKLOCAL      0x0000
  59 #define LS_SCOPE_AREA           0x2000
  60 #define LS_SCOPE_AS             0x4000
  61 #define LS_SCOPE_MASK           0x6000
  62
  63 /*************************************************
  64  *
  65  * is the above a bug in the documentation?
  66  *
  67  *************************************************/
  68
  69
  70 /* rla_link.link_type   */
  71 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
  72 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
  73 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
  74
  75 /* rla_flags    */
  76 #define RLA_FLAG_B      0x01
  77 #define RLA_FLAG_E      0x02
  78 #define RLA_FLAG_V      0x04
  79 #define RLA_FLAG_W      0x08
  80
  81 /* sla_tosmetric breakdown      */
  82 #define SLA_MASK_TOS            0x7f000000
  83 #define SLA_MASK_METRIC         0x00ffffff
  84 #define SLA_SHIFT_TOS           24
  85
  86 /* asla_tosmetric breakdown     */
  87 #define ASLA_FLAG_EXTERNAL      0x80000000
  88 #define ASLA_MASK_TOS           0x7f000000
  89 #define ASLA_SHIFT_TOS          24
  90 #define ASLA_MASK_METRIC        0x00ffffff
  91
  92 /* multicast vertex type */
  93 #define MCLA_VERTEX_ROUTER      1
  94 #define MCLA_VERTEX_NETWORK     2
  95
  96 typedef u_int32_t rtrid_t;
  97
  98 /* link state advertisement header */
  99 struct lsa_hdr {
 100     u_int16_t ls_age;
 101     u_int16_t ls_type;
 102     rtrid_t ls_stateid;
 103     rtrid_t ls_router;
 104     u_int32_t ls_seq;
 105     u_int16_t ls_chksum;
 106     u_int16_t ls_length;
 107 } ;
 108
 109 struct lsa_prefix {
 110     u_int8_t lsa_p_len;
 111     u_int8_t lsa_p_opt;
 112     u_int16_t lsa_p_mbz;
 113     u_int8_t lsa_p_prefix[4];
 114 };
 115
 116 /* link state advertisement */
 117 struct lsa {
 118     struct lsa_hdr ls_hdr;
 119
 120     /* Link state types */
 121     union {
 122         /* Router links advertisements */
 123         struct {
 124             union {
 125                 u_int8_t flg;
 126                 u_int32_t opt;
 127             } rla_flgandopt;
 128 #define rla_flags       rla_flgandopt.flg
 129 #define rla_options     rla_flgandopt.opt
 130             struct rlalink {
 131                 u_int8_t link_type;
 132                 u_int8_t link_zero[1];
 133                 u_int16_t link_metric;
 134                 u_int32_t link_ifid;
 135                 u_int32_t link_nifid;
 136                 rtrid_t link_nrtid;
 137             } rla_link[1];              /* may repeat   */
 138         } un_rla;
 139
 140         /* Network links advertisements */
 141         struct {
 142             u_int32_t nla_options;
 143             rtrid_t nla_router[1];      /* may repeat   */
 144         } un_nla;
 145
 146         /* Inter Area Prefix LSA */
 147         struct {
 148             u_int32_t inter_ap_metric;
 149             struct lsa_prefix inter_ap_prefix[1];
 150         } un_inter_ap;
 151
 152 #if 0
 153         /* Summary links advertisements */
 154         struct {
 155             struct in_addr sla_mask;
 156             u_int32_t sla_tosmetric[1]; /* may repeat   */
 157         } un_sla;
 158
 159         /* AS external links advertisements */
 160         struct {
 161             struct in_addr asla_mask;
 162             struct aslametric {
 163                 u_int32_t asla_tosmetric;
 164                 struct in_addr asla_forward;
 165                 struct in_addr asla_tag;
 166             } asla_metric[1];           /* may repeat   */
 167         } un_asla;
 168
 169         /* Multicast group membership */
 170         struct mcla {
 171             u_int32_t mcla_vtype;
 172             struct in_addr mcla_vid;
 173         } un_mcla[1];
 174 #endif
 175
 176         /* Type 7 LSA */
 177
 178         /* Link LSA */
 179         struct llsa {
 180             union {
 181                 u_int8_t pri;
 182                 u_int32_t opt;
 183             } llsa_priandopt;
 184 #define llsa_priority   llsa_priandopt.pri
 185 #define llsa_options    llsa_priandopt.opt
 186             struct in6_addr llsa_lladdr;
 187             u_int32_t llsa_nprefix;
 188             struct lsa_prefix llsa_prefix[1];
 189         } un_llsa;
 190
 191         /* Intra-Area-Prefix */
 192         struct {
 193             u_int16_t intra_ap_nprefix;
 194             u_int16_t intra_ap_lstype;
 195             rtrid_t intra_ap_lsid;
 196             rtrid_t intra_ap_rtid;
 197             struct lsa_prefix intra_ap_prefix[1];
 198         } un_intra_ap;
 199     } lsa_un;
 200 } ;
 201
 202
 203 /*
 204  * TOS metric struct (will be 0 or more in router links update)
 205  */
 206 struct tos_metric {
 207     u_int8_t tos_type;
 208     u_int8_t tos_zero;
 209     u_int16_t tos_metric;
 210 } ;
 211
 212 #define OSPF_AUTH_SIZE  8
 213
 214 /*
 215  * the main header
 216  */
 217 struct ospf6hdr {
 218     u_int8_t ospf6_version;
 219     u_int8_t ospf6_type;
 220     u_int16_t ospf6_len;
 221     rtrid_t ospf6_routerid;
 222     rtrid_t ospf6_areaid;
 223     u_int16_t ospf6_chksum;
 224     u_int8_t ospf6_instanceid;
 225     u_int8_t ospf6_rsvd;
 226     union {
 227
 228         /* Hello packet */
 229         struct {
 230             u_int32_t hello_ifid;
 231             union {
 232                 u_int8_t pri;
 233                 u_int32_t opt;
 234             } hello_priandopt;
 235 #define hello_priority  hello_priandopt.pri
 236 #define hello_options   hello_priandopt.opt
 237             u_int16_t hello_helloint;
 238             u_int16_t hello_deadint;
 239             rtrid_t hello_dr;
 240             rtrid_t hello_bdr;
 241             rtrid_t hello_neighbor[1]; /* may repeat    */
 242         } un_hello;
 243
 244         /* Database Description packet */
 245         struct {
 246             u_int32_t db_options;
 247             u_int16_t db_mtu;
 248             u_int8_t db_mbz;
 249             u_int8_t db_flags;
 250             u_int32_t db_seq;
 251             struct lsa_hdr db_lshdr[1]; /* may repeat   */
 252         } un_db;
 253
 254         /* Link State Request */
 255         struct lsr {
 256             u_int16_t ls_mbz;
 257             u_int16_t ls_type;
 258             rtrid_t ls_stateid;
 259             rtrid_t ls_router;
 260         } un_lsr[1];            /* may repeat   */
 261
 262         /* Link State Update */
 263         struct {
 264             u_int32_t lsu_count;
 265             struct lsa lsu_lsa[1]; /* may repeat        */
 266         } un_lsu;
 267
 268         /* Link State Acknowledgement */
 269         struct {
 270             struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
 271         } un_lsa ;
 272     } ospf6_un ;
 273 } ;
 274
 275 #define ospf6_hello     ospf6_un.un_hello
 276 #define ospf6_db        ospf6_un.un_db
 277 #define ospf6_lsr       ospf6_un.un_lsr
 278 #define ospf6_lsu       ospf6_un.un_lsu
 279 #define ospf6_lsa       ospf6_un.un_lsa
 280