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 #define OSPF6_DB_M6             0x10  /* IPv6 MTU */
  48
  49 /* ls_type      */
  50 #define LS_TYPE_ROUTER          1   /* router link */
  51 #define LS_TYPE_NETWORK         2   /* network link */
  52 #define LS_TYPE_INTER_AP        3   /* Inter-Area-Prefix */
  53 #define LS_TYPE_INTER_AR        4   /* Inter-Area-Router */
  54 #define LS_TYPE_ASE             5   /* ASE */
  55 #define LS_TYPE_GROUP           6   /* Group membership */
  56 #define LS_TYPE_NSSA            7   /* NSSA */
  57 #define LS_TYPE_LINK            8   /* Link LSA */
  58 #define LS_TYPE_INTRA_AP        9   /* Intra-Area-Prefix */
  59 #define LS_TYPE_INTRA_ATE       10  /* Intra-Area-TE */
  60 #define LS_TYPE_GRACE           11  /* Grace LSA */
  61 #define LS_TYPE_RI              12  /* Router information */
  62 #define LS_TYPE_INTER_ASTE      13  /* Inter-AS-TE */
  63 #define LS_TYPE_L1VPN           14  /* L1VPN */
  64 #define LS_TYPE_MASK            0x1fff
  65
  66 #define LS_SCOPE_LINKLOCAL      0x0000
  67 #define LS_SCOPE_AREA           0x2000
  68 #define LS_SCOPE_AS             0x4000
  69 #define LS_SCOPE_MASK           0x6000
  70 #define LS_SCOPE_U              0x8000
  71
  72 /* rla_link.link_type   */
  73 #define RLA_TYPE_ROUTER         1   /* point-to-point to another router */
  74 #define RLA_TYPE_TRANSIT        2   /* connection to transit network    */
  75 #define RLA_TYPE_VIRTUAL        4   /* virtual link                     */
  76
  77 /* rla_flags    */
  78 #define RLA_FLAG_B      0x01
  79 #define RLA_FLAG_E      0x02
  80 #define RLA_FLAG_V      0x04
  81 #define RLA_FLAG_W      0x08
  82 #define RLA_FLAG_N      0x10
  83
  84 /* lsa_prefix options */
  85 #define LSA_PREFIX_OPT_NU 0x01
  86 #define LSA_PREFIX_OPT_LA 0x02
  87 #define LSA_PREFIX_OPT_MC 0x04
  88 #define LSA_PREFIX_OPT_P  0x08
  89 #define LSA_PREFIX_OPT_DN 0x10
  90
  91 /* sla_tosmetric breakdown      */
  92 #define SLA_MASK_TOS            0x7f000000
  93 #define SLA_MASK_METRIC         0x00ffffff
  94 #define SLA_SHIFT_TOS           24
  95
  96 /* asla_metric */
  97 #define ASLA_FLAG_FWDADDR       0x02000000
  98 #define ASLA_FLAG_ROUTETAG      0x01000000
  99 #define ASLA_MASK_METRIC        0x00ffffff
 100
 101 /* RFC6506 Section 4.1 */
 102 #define OSPF6_AT_HDRLEN             16U
 103 #define OSPF6_AUTH_TYPE_HMAC        0x0001
 104
 105 typedef u_int32_t rtrid_t;
 106
 107 /* link state advertisement header */
 108 struct lsa6_hdr {
 109     u_int16_t ls_age;
 110     u_int16_t ls_type;
 111     rtrid_t ls_stateid;
 112     rtrid_t ls_router;
 113     u_int32_t ls_seq;
 114     u_int16_t ls_chksum;
 115     u_int16_t ls_length;
 116 };
 117
 118 struct lsa6_prefix {
 119     u_int8_t lsa_p_len;
 120     u_int8_t lsa_p_opt;
 121     u_int16_t lsa_p_metric;
 122     u_int8_t lsa_p_prefix[4];
 123 };
 124
 125 /* link state advertisement */
 126 struct lsa6 {
 127     struct lsa6_hdr ls_hdr;
 128
 129     /* Link state types */
 130     union {
 131         /* Router links advertisements */
 132         struct {
 133             union {
 134                 u_int8_t flg;
 135                 u_int32_t opt;
 136             } rla_flgandopt;
 137 #define rla_flags       rla_flgandopt.flg
 138 #define rla_options     rla_flgandopt.opt
 139             struct rlalink6 {
 140                 u_int8_t link_type;
 141                 u_int8_t link_zero[1];
 142                 u_int16_t link_metric;
 143                 u_int32_t link_ifid;
 144                 u_int32_t link_nifid;
 145                 rtrid_t link_nrtid;
 146             } rla_link[1];              /* may repeat   */
 147         } un_rla;
 148
 149         /* Network links advertisements */
 150         struct {
 151             u_int32_t nla_options;
 152             rtrid_t nla_router[1];      /* may repeat   */
 153         } un_nla;
 154
 155         /* Inter Area Prefix LSA */
 156         struct {
 157             u_int32_t inter_ap_metric;
 158             struct lsa6_prefix inter_ap_prefix[1];
 159         } un_inter_ap;
 160
 161         /* AS external links advertisements */
 162         struct {
 163             u_int32_t asla_metric;
 164             struct lsa6_prefix asla_prefix[1];
 165             /* some optional fields follow */
 166         } un_asla;
 167
 168 #if 0
 169         /* Summary links advertisements */
 170         struct {
 171             struct in_addr sla_mask;
 172             u_int32_t sla_tosmetric[1]; /* may repeat   */
 173         } un_sla;
 174
 175         /* Multicast group membership */
 176         struct mcla {
 177             u_int32_t mcla_vtype;
 178             struct in_addr mcla_vid;
 179         } un_mcla[1];
 180 #endif
 181
 182         /* Type 7 LSA */
 183
 184         /* Link LSA */
 185         struct llsa {
 186             union {
 187                 u_int8_t pri;
 188                 u_int32_t opt;
 189             } llsa_priandopt;
 190 #define llsa_priority   llsa_priandopt.pri
 191 #define llsa_options    llsa_priandopt.opt
 192             struct in6_addr llsa_lladdr;
 193             u_int32_t llsa_nprefix;
 194             struct lsa6_prefix llsa_prefix[1];
 195         } un_llsa;
 196
 197         /* Intra-Area-Prefix */
 198         struct {
 199             u_int16_t intra_ap_nprefix;
 200             u_int16_t intra_ap_lstype;
 201             rtrid_t intra_ap_lsid;
 202             rtrid_t intra_ap_rtid;
 203             struct lsa6_prefix intra_ap_prefix[1];
 204         } un_intra_ap;
 205     } lsa_un;
 206 };
 207
 208 /*
 209  * the main header
 210  */
 211 struct ospf6hdr {
 212     u_int8_t ospf6_version;
 213     u_int8_t ospf6_type;
 214     u_int16_t ospf6_len;
 215     rtrid_t ospf6_routerid;
 216     rtrid_t ospf6_areaid;
 217     u_int16_t ospf6_chksum;
 218     u_int8_t ospf6_instanceid;
 219     u_int8_t ospf6_rsvd;
 220     union {
 221
 222         /* Hello packet */
 223         struct {
 224             u_int32_t hello_ifid;
 225             union {
 226                 u_int8_t pri;
 227                 u_int32_t opt;
 228             } hello_priandopt;
 229 #define hello_priority  hello_priandopt.pri
 230 #define hello_options   hello_priandopt.opt
 231             u_int16_t hello_helloint;
 232             u_int16_t hello_deadint;
 233             rtrid_t hello_dr;
 234             rtrid_t hello_bdr;
 235             rtrid_t hello_neighbor[1]; /* may repeat    */
 236         } un_hello;
 237
 238         /* Database Description packet */
 239         struct {
 240             u_int32_t db_options;
 241             u_int16_t db_mtu;
 242             u_int8_t db_mbz;
 243             u_int8_t db_flags;
 244             u_int32_t db_seq;
 245             struct lsa6_hdr db_lshdr[1]; /* may repeat  */
 246         } un_db;
 247
 248         /* Link State Request */
 249         struct lsr6 {
 250             u_int16_t ls_mbz;
 251             u_int16_t ls_type;
 252             rtrid_t ls_stateid;
 253             rtrid_t ls_router;
 254         } un_lsr[1];            /* may repeat   */
 255
 256         /* Link State Update */
 257         struct {
 258             u_int32_t lsu_count;
 259             struct lsa6 lsu_lsa[1]; /* may repeat       */
 260         } un_lsu;
 261
 262         /* Link State Acknowledgement */
 263         struct {
 264             struct lsa6_hdr lsa_lshdr[1]; /* may repeat */
 265         } un_lsa ;
 266     } ospf6_un ;
 267 };
 268
 269 #define ospf6_hello     ospf6_un.un_hello
 270 #define ospf6_db        ospf6_un.un_db
 271 #define ospf6_lsr       ospf6_un.un_lsr
 272 #define ospf6_lsu       ospf6_un.un_lsu
 273 #define ospf6_lsa       ospf6_un.un_lsa
 274