The Tcpdump Group git mirrors - tcpdump/blob - ospf6.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/ospf6.h,v 1.7 2006-09-05 15:50:26 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_HELLO         1       /* Hello */
  25 #define OSPF_TYPE_DD            2       /* Database Description */
  26 #define OSPF_TYPE_LS_REQ        3       /* Link State Request */
  27 #define OSPF_TYPE_LS_UPDATE     4       /* Link State Update */
  28 #define OSPF_TYPE_LS_ACK        5       /* Link State Ack */
  29
  30 /* Options *_options    */
  31 #define OSPF6_OPTION_V6 0x01    /* V6 bit: A bit for peeping tom */
  32 #define OSPF6_OPTION_E  0x02    /* E bit: External routes advertised    */
  33 #define OSPF6_OPTION_MC 0x04    /* MC bit: Multicast capable */
  34 #define OSPF6_OPTION_N  0x08    /* N bit: For type-7 LSA */
  35 #define OSPF6_OPTION_R  0x10    /* R bit: Router bit */
  36 #define OSPF6_OPTION_DC 0x20    /* DC bit: Demand circuits */
  37 /* The field is actually 24-bit (RFC5340 Section A.2). */
  38 #define OSPF6_OPTION_AF 0x0100  /* AF bit: Multiple address families */
  39 #define OSPF6_OPTION_L  0x0200  /* L bit: Link-local signaling (LLS) */
  40 #define OSPF6_OPTION_AT 0x0400  /* AT bit: Authentication trailer */
  41
  42
  43 /* db_flags     */
  44 #define OSPF6_DB_INIT           0x04        /*  */
  45 #define OSPF6_DB_MORE           0x02
  46 #define OSPF6_DB_MASTER         0x01
  47
  48 /* ls_type      */
  49 #define LS_TYPE_ROUTER          1   /* router link */
  50 #define LS_TYPE_NETWORK         2   /* network link */
  51 #define LS_TYPE_INTER_AP        3   /* Inter-Area-Prefix */
  52 #define LS_TYPE_INTER_AR        4   /* Inter-Area-Router */
  53 #define LS_TYPE_ASE             5   /* ASE */
  54 #define LS_TYPE_GROUP           6   /* Group membership */
  55 #define LS_TYPE_NSSA            7   /* NSSA */
  56 #define LS_TYPE_LINK            8   /* Link LSA */
  57 #define LS_TYPE_INTRA_AP        9   /* Intra-Area-Prefix */
  58 #define LS_TYPE_INTRA_ATE       10  /* Intra-Area-TE */
  59 #define LS_TYPE_GRACE           11  /* Grace LSA */
  60 #define LS_TYPE_MASK            0x1fff
  61
  62 #define LS_SCOPE_LINKLOCAL      0x0000
  63 #define LS_SCOPE_AREA           0x2000
  64 #define LS_SCOPE_AS             0x4000
  65 #define LS_SCOPE_MASK           0x6000
  66 #define LS_SCOPE_U              0x8000
  67
  68 /* rla_link.link_type   */
  69 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
  70 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
  71 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
  72
  73 /* rla_flags    */
  74 #define RLA_FLAG_B      0x01
  75 #define RLA_FLAG_E      0x02
  76 #define RLA_FLAG_V      0x04
  77 #define RLA_FLAG_W      0x08
  78 #define RLA_FLAG_N      0x10
  79
  80 /* lsa_prefix options */
  81 #define LSA_PREFIX_OPT_NU 0x01
  82 #define LSA_PREFIX_OPT_LA 0x02
  83 #define LSA_PREFIX_OPT_MC 0x04
  84 #define LSA_PREFIX_OPT_P  0x08
  85 #define LSA_PREFIX_OPT_DN 0x10
  86
  87 /* sla_tosmetric breakdown      */
  88 #define SLA_MASK_TOS            0x7f000000
  89 #define SLA_MASK_METRIC         0x00ffffff
  90 #define SLA_SHIFT_TOS           24
  91
  92 /* asla_metric */
  93 #define ASLA_FLAG_FWDADDR       0x02000000
  94 #define ASLA_FLAG_ROUTETAG      0x01000000
  95 #define ASLA_MASK_METRIC        0x00ffffff
  96
  97 typedef u_int32_t rtrid_t;
  98
  99 /* link state advertisement header */
 100 struct lsa6_hdr {
 101     u_int16_t ls_age;
 102     u_int16_t ls_type;
 103     rtrid_t ls_stateid;
 104     rtrid_t ls_router;
 105     u_int32_t ls_seq;
 106     u_int16_t ls_chksum;
 107     u_int16_t ls_length;
 108 };
 109
 110 struct lsa6_prefix {
 111     u_int8_t lsa_p_len;
 112     u_int8_t lsa_p_opt;
 113     u_int16_t lsa_p_metric;
 114     u_int8_t lsa_p_prefix[4];
 115 };
 116
 117 /* link state advertisement */
 118 struct lsa6 {
 119     struct lsa6_hdr ls_hdr;
 120
 121     /* Link state types */
 122     union {
 123         /* Router links advertisements */
 124         struct {
 125             union {
 126                 u_int8_t flg;
 127                 u_int32_t opt;
 128             } rla_flgandopt;
 129 #define rla_flags       rla_flgandopt.flg
 130 #define rla_options     rla_flgandopt.opt
 131             struct rlalink6 {
 132                 u_int8_t link_type;
 133                 u_int8_t link_zero[1];
 134                 u_int16_t link_metric;
 135                 u_int32_t link_ifid;
 136                 u_int32_t link_nifid;
 137                 rtrid_t link_nrtid;
 138             } rla_link[1];              /* may repeat   */
 139         } un_rla;
 140
 141         /* Network links advertisements */
 142         struct {
 143             u_int32_t nla_options;
 144             rtrid_t nla_router[1];      /* may repeat   */
 145         } un_nla;
 146
 147         /* Inter Area Prefix LSA */
 148         struct {
 149             u_int32_t inter_ap_metric;
 150             struct lsa6_prefix inter_ap_prefix[1];
 151         } un_inter_ap;
 152
 153         /* AS external links advertisements */
 154         struct {
 155             u_int32_t asla_metric;
 156             struct lsa6_prefix asla_prefix[1];
 157             /* some optional fields follow */
 158         } un_asla;
 159
 160 #if 0
 161         /* Summary links advertisements */
 162         struct {
 163             struct in_addr sla_mask;
 164             u_int32_t sla_tosmetric[1]; /* may repeat   */
 165         } un_sla;
 166
 167         /* Multicast group membership */
 168         struct mcla {
 169             u_int32_t mcla_vtype;
 170             struct in_addr mcla_vid;
 171         } un_mcla[1];
 172 #endif
 173
 174         /* Type 7 LSA */
 175
 176         /* Link LSA */
 177         struct llsa {
 178             union {
 179                 u_int8_t pri;
 180                 u_int32_t opt;
 181             } llsa_priandopt;
 182 #define llsa_priority   llsa_priandopt.pri
 183 #define llsa_options    llsa_priandopt.opt
 184             struct in6_addr llsa_lladdr;
 185             u_int32_t llsa_nprefix;
 186             struct lsa6_prefix llsa_prefix[1];
 187         } un_llsa;
 188
 189         /* Intra-Area-Prefix */
 190         struct {
 191             u_int16_t intra_ap_nprefix;
 192             u_int16_t intra_ap_lstype;
 193             rtrid_t intra_ap_lsid;
 194             rtrid_t intra_ap_rtid;
 195             struct lsa6_prefix intra_ap_prefix[1];
 196         } un_intra_ap;
 197     } lsa_un;
 198 };
 199
 200
 201 #define OSPF_AUTH_SIZE  8
 202
 203 /*
 204  * the main header
 205  */
 206 struct ospf6hdr {
 207     u_int8_t ospf6_version;
 208     u_int8_t ospf6_type;
 209     u_int16_t ospf6_len;
 210     rtrid_t ospf6_routerid;
 211     rtrid_t ospf6_areaid;
 212     u_int16_t ospf6_chksum;
 213     u_int8_t ospf6_instanceid;
 214     u_int8_t ospf6_rsvd;
 215     union {
 216
 217         /* Hello packet */
 218         struct {
 219             u_int32_t hello_ifid;
 220             union {
 221                 u_int8_t pri;
 222                 u_int32_t opt;
 223             } hello_priandopt;
 224 #define hello_priority  hello_priandopt.pri
 225 #define hello_options   hello_priandopt.opt
 226             u_int16_t hello_helloint;
 227             u_int16_t hello_deadint;
 228             rtrid_t hello_dr;
 229             rtrid_t hello_bdr;
 230             rtrid_t hello_neighbor[1]; /* may repeat    */
 231         } un_hello;
 232
 233         /* Database Description packet */
 234         struct {
 235             u_int32_t db_options;
 236             u_int16_t db_mtu;
 237             u_int8_t db_mbz;
 238             u_int8_t db_flags;
 239             u_int32_t db_seq;
 240             struct lsa6_hdr db_lshdr[1]; /* may repeat  */
 241         } un_db;
 242
 243         /* Link State Request */
 244         struct lsr6 {
 245             u_int16_t ls_mbz;
 246             u_int16_t ls_type;
 247             rtrid_t ls_stateid;
 248             rtrid_t ls_router;
 249         } un_lsr[1];            /* may repeat   */
 250
 251         /* Link State Update */
 252         struct {
 253             u_int32_t lsu_count;
 254             struct lsa6 lsu_lsa[1]; /* may repeat       */
 255         } un_lsu;
 256
 257         /* Link State Acknowledgement */
 258         struct {
 259             struct lsa6_hdr lsa_lshdr[1]; /* may repeat */
 260         } un_lsa ;
 261     } ospf6_un ;
 262 };
 263
 264 #define ospf6_hello     ospf6_un.un_hello
 265 #define ospf6_db        ospf6_un.un_db
 266 #define ospf6_lsr       ospf6_un.un_lsr
 267 #define ospf6_lsu       ospf6_un.un_lsu
 268 #define ospf6_lsa       ospf6_un.un_lsa
 269