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ospf6.h

/* @(#) $Header: /tcpdump/master/tcpdump/ospf6.h,v 1.6 2002/12/11 07:13:56 guy Exp $ (LBL) */
/*
 * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
 */
#define     OSPF_TYPE_UMD     0     /* UMd's special monitoring packets */
#define     OSPF_TYPE_HELLO   1     /* Hello */
#define     OSPF_TYPE_DB      2     /* Database Description */
#define     OSPF_TYPE_LSR     3     /* Link State Request */
#define     OSPF_TYPE_LSU     4     /* Link State Update */
#define     OSPF_TYPE_LSA     5     /* Link State Ack */
#define     OSPF_TYPE_MAX     6

/* Options *_options    */
#define OSPF6_OPTION_V6 0x01  /* V6 bit: A bit for peeping tom */
#define OSPF6_OPTION_E  0x02  /* E bit: External routes advertised      */
#define OSPF6_OPTION_MC 0x04  /* MC bit: Multicast capable */
#define OSPF6_OPTION_N  0x08  /* N bit: For type-7 LSA */
#define OSPF6_OPTION_R  0x10  /* R bit: Router bit */
#define OSPF6_OPTION_DC 0x20  /* DC bit: Demand circuits */


/* db_flags */
#define     OSPF6_DB_INIT           0x04      /*      */
#define     OSPF6_DB_MORE           0x02
#define     OSPF6_DB_MASTER         0x01

/* ls_type  */
#define     LS_TYPE_ROUTER          1   /* router link */
#define     LS_TYPE_NETWORK         2   /* network link */
#define     LS_TYPE_INTER_AP  3   /* Inter-Area-Prefix */
#define     LS_TYPE_INTER_AR  4   /* Inter-Area-Router */
#define     LS_TYPE_ASE       5   /* ASE */
#define     LS_TYPE_GROUP           6   /* Group membership */
#define     LS_TYPE_TYPE7           7   /* Type 7 LSA */
#define     LS_TYPE_LINK            8   /* Link LSA */
#define     LS_TYPE_INTRA_AP  9   /* Intra-Area-Prefix */
#define     LS_TYPE_MAX       10
#define LS_TYPE_MASK          0x1fff

#define LS_SCOPE_LINKLOCAL    0x0000
#define LS_SCOPE_AREA         0x2000
#define LS_SCOPE_AS           0x4000
#define LS_SCOPE_MASK         0x6000

/*************************************************
 *
 * is the above a bug in the documentation?
 *
 *************************************************/


/* rla_link.link_type   */
#define     RLA_TYPE_ROUTER         1   /* point-to-point to another router   */
#define     RLA_TYPE_TRANSIT  2   /* connection to transit network      */
#define RLA_TYPE_VIRTUAL      4   /* virtual link                 */

/* rla_flags      */
#define     RLA_FLAG_B  0x01
#define     RLA_FLAG_E  0x02
#define     RLA_FLAG_V  0x04
#define     RLA_FLAG_W  0x08

/* sla_tosmetric breakdown    */
#define     SLA_MASK_TOS            0x7f000000
#define     SLA_MASK_METRIC         0x00ffffff
#define SLA_SHIFT_TOS         24

/* asla_metric */
#define ASLA_FLAG_EXTERNAL    0x04000000
#define ASLA_FLAG_FWDADDR     0x02000000
#define ASLA_FLAG_ROUTETAG    0x01000000
#define     ASLA_MASK_METRIC  0x00ffffff

/* multicast vertex type */
#define     MCLA_VERTEX_ROUTER      1
#define     MCLA_VERTEX_NETWORK     2

typedef u_int32_t rtrid_t;

/* link state advertisement header */
struct lsa_hdr {
    u_int16_t ls_age;
    u_int16_t ls_type;
    rtrid_t ls_stateid;
    rtrid_t ls_router;
    u_int32_t ls_seq;
    u_int16_t ls_chksum;
    u_int16_t ls_length;
};

struct lsa_prefix {
    u_int8_t lsa_p_len;
    u_int8_t lsa_p_opt;
    u_int16_t lsa_p_mbz;
    u_int8_t lsa_p_prefix[4];
};

/* link state advertisement */
struct lsa {
    struct lsa_hdr ls_hdr;

    /* Link state types */
    union {
      /* Router links advertisements */
      struct {
          union {
            u_int8_t flg;
            u_int32_t opt;
          } rla_flgandopt;
#define rla_flags rla_flgandopt.flg
#define rla_options     rla_flgandopt.opt
          struct rlalink {
            u_int8_t link_type;
            u_int8_t link_zero[1];
            u_int16_t link_metric;
            u_int32_t link_ifid;
            u_int32_t link_nifid;
            rtrid_t link_nrtid;
          } rla_link[1];            /* may repeat     */
      } un_rla;

      /* Network links advertisements */
      struct {
          u_int32_t nla_options;
          rtrid_t nla_router[1];    /* may repeat     */
      } un_nla;

      /* Inter Area Prefix LSA */
      struct {
          u_int32_t inter_ap_metric;
          struct lsa_prefix inter_ap_prefix[1];
      } un_inter_ap;

      /* AS external links advertisements */
      struct {
          u_int32_t asla_metric;
          struct lsa_prefix asla_prefix[1];
          /* some optional fields follow */
      } un_asla;

#if 0
      /* Summary links advertisements */
      struct {
          struct in_addr sla_mask;
          u_int32_t sla_tosmetric[1];     /* may repeat     */
      } un_sla;

      /* Multicast group membership */
      struct mcla {
          u_int32_t mcla_vtype;
          struct in_addr mcla_vid;
      } un_mcla[1];
#endif

      /* Type 7 LSA */

      /* Link LSA */
      struct llsa {
          union {
            u_int8_t pri;
            u_int32_t opt;
          } llsa_priandopt;
#define llsa_priority   llsa_priandopt.pri
#define llsa_options    llsa_priandopt.opt
          struct in6_addr llsa_lladdr;
          u_int32_t llsa_nprefix;
          struct lsa_prefix llsa_prefix[1];
      } un_llsa;

      /* Intra-Area-Prefix */
      struct {
          u_int16_t intra_ap_nprefix;
          u_int16_t intra_ap_lstype;
          rtrid_t intra_ap_lsid;
          rtrid_t intra_ap_rtid;
          struct lsa_prefix intra_ap_prefix[1];
      } un_intra_ap;
    } lsa_un;
};


/*
 * TOS metric struct (will be 0 or more in router links update)
 */
struct tos_metric {
    u_int8_t tos_type;
    u_int8_t tos_zero;
    u_int16_t tos_metric;
};

#define     OSPF_AUTH_SIZE    8

/*
 * the main header
 */
struct ospf6hdr {
    u_int8_t ospf6_version;
    u_int8_t ospf6_type;
    u_int16_t ospf6_len;
    rtrid_t ospf6_routerid;
    rtrid_t ospf6_areaid;
    u_int16_t ospf6_chksum;
    u_int8_t ospf6_instanceid;
    u_int8_t ospf6_rsvd;
    union {

      /* Hello packet */
      struct {
          u_int32_t hello_ifid;
          union {
            u_int8_t pri;
            u_int32_t opt;
          } hello_priandopt;
#define hello_priority  hello_priandopt.pri
#define hello_options   hello_priandopt.opt
          u_int16_t hello_helloint;
          u_int16_t hello_deadint;
          rtrid_t hello_dr;
          rtrid_t hello_bdr;
          rtrid_t hello_neighbor[1]; /* may repeat    */
      } un_hello;

      /* Database Description packet */
      struct {
          u_int32_t db_options;
          u_int16_t db_mtu;
          u_int8_t db_mbz;
          u_int8_t db_flags;
          u_int32_t db_seq;
          struct lsa_hdr db_lshdr[1]; /* may repeat   */
      } un_db;

      /* Link State Request */
      struct lsr {
          u_int16_t ls_mbz;
          u_int16_t ls_type;
          rtrid_t ls_stateid;
          rtrid_t ls_router;
      } un_lsr[1];            /* may repeat     */

      /* Link State Update */
      struct {
          u_int32_t lsu_count;
          struct lsa lsu_lsa[1]; /* may repeat  */
      } un_lsu;

      /* Link State Acknowledgement */
      struct {
          struct lsa_hdr lsa_lshdr[1]; /* may repeat  */
      } un_lsa ;
    } ospf6_un ;
};

#define     ospf6_hello ospf6_un.un_hello
#define     ospf6_db    ospf6_un.un_db
#define     ospf6_lsr   ospf6_un.un_lsr
#define     ospf6_lsu   ospf6_un.un_lsu
#define     ospf6_lsa   ospf6_un.un_lsa


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