ospf6.h

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/*
 * 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 ([e-mail])
 */
#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_tosmetric breakdown
 */
#define ASLA_FLAG_EXTERNAL   0x80000000
#define ASLA_MASK_TOS        0x7f000000
#define ASLA_SHIFT_TOS       24
#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;

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

         /* AS external links advertisements */
         struct {
           struct in_addr asla_mask;
           struct aslametric {
             u_int32_t      asla_tosmetric;
             struct in_addr asla_forward;
             struct in_addr asla_tag;
           } asla_metric[1];            /* may repeat */
         } un_asla;

         /* 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