ospfd/ospf_neighbor.h

   1 /*
   2  * OSPF Neighbor functions.
   3  * Copyright (C) 1999, 2000 Toshiaki Takada
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation; either version 2, or (at your
  10  * option) any later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Zebra; see the file COPYING.  If not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 #ifndef _ZEBRA_OSPF_NEIGHBOR_H
  24 #define _ZEBRA_OSPF_NEIGHBOR_H
  25
  26 #include <ospfd/ospf_packet.h>
  27
  28 /* Neighbor Data Structure */
  29 struct ospf_neighbor
  30 {
  31   /* This neighbor's parent ospf interface. */
  32   struct ospf_interface *oi;
  33
  34   /* OSPF neighbor Information */
  35   u_char state;                         /* NSM status. */
  36   u_char dd_flags;                      /* DD bit flags. */
  37   u_int32_t dd_seqnum;                  /* DD Sequence Number. */
  38
  39   /* Neighbor Information from Hello. */
  40   struct prefix address;                /* Neighbor Interface Address. */
  41
  42   struct in_addr src;                   /* Src address. */
  43   struct in_addr router_id;             /* Router ID. */
  44   u_char options;                       /* Options. */
  45   int priority;                         /* Router Priority. */
  46   struct in_addr d_router;              /* Designated Router. */
  47   struct in_addr bd_router;             /* Backup Designated Router. */
  48
  49   /* Last sent Database Description packet. */
  50   struct ospf_packet *last_send;
  51   /* Timestemp when last Database Description packet was sent */
  52   struct timeval last_send_ts;
  53
  54   /* Last received Databse Description packet. */
  55   struct
  56   {
  57     u_char options;
  58     u_char flags;
  59     u_int32_t dd_seqnum;
  60   } last_recv;
  61
  62   /* LSA data. */
  63   struct ospf_lsdb ls_rxmt;
  64   struct ospf_lsdb db_sum;
  65   struct ospf_lsdb ls_req;
  66   struct ospf_lsa *ls_req_last;
  67
  68   u_int32_t crypt_seqnum;           /* Cryptographic Sequence Number. */
  69
  70   /* Timer values. */
  71   u_int32_t v_inactivity;
  72   u_int32_t v_db_desc;
  73   u_int32_t v_ls_req;
  74   u_int32_t v_ls_upd;
  75
  76   /* Threads. */
  77   struct thread *t_inactivity;
  78   struct thread *t_db_desc;
  79   struct thread *t_ls_req;
  80   struct thread *t_ls_upd;
  81   struct thread *t_hello_reply;
  82
  83   /* NBMA configured neighbour */
  84   struct ospf_nbr_nbma *nbr_nbma;
  85
  86   /* Statistics */
  87   struct timeval ts_last_progress;  /* last advance of NSM            */
  88   struct timeval ts_last_regress;   /* last regressive NSM change     */
  89   const char *last_regress_str;     /* Event which last regressed NSM */
  90   u_int32_t state_change;           /* NSM state change counter       */
  91
  92   /* BFD information */
  93   void *bfd_info;
  94 };
  95
  96 /* Macros. */
  97 #define NBR_IS_DR(n)    IPV4_ADDR_SAME (&n->address.u.prefix4, &n->d_router)
  98 #define NBR_IS_BDR(n)   IPV4_ADDR_SAME (&n->address.u.prefix4, &n->bd_router)
  99
 100 /* Prototypes. */
 101 extern struct ospf_neighbor *ospf_nbr_new (struct ospf_interface *);
 102 extern void ospf_nbr_free (struct ospf_neighbor *);
 103 extern void ospf_nbr_delete (struct ospf_neighbor *);
 104 extern int ospf_nbr_bidirectional (struct in_addr *, struct in_addr *, int);
 105 extern void ospf_nbr_add_self (struct ospf_interface *);
 106 extern int ospf_nbr_count (struct ospf_interface *, int);
 107 #ifdef HAVE_OPAQUE_LSA
 108 extern int ospf_nbr_count_opaque_capable (struct ospf_interface *);
 109 #endif /* HAVE_OPAQUE_LSA */
 110 extern struct ospf_neighbor *ospf_nbr_get (struct ospf_interface *,
 111                                            struct ospf_header *,
 112                                            struct ip *, struct prefix *);
 113 extern struct ospf_neighbor *ospf_nbr_lookup (struct ospf_interface *,
 114                                               struct ip *,
 115                                               struct ospf_header *);
 116 extern struct ospf_neighbor *ospf_nbr_lookup_by_addr (struct route_table *,
 117                                                       struct in_addr *);
 118 extern struct ospf_neighbor *ospf_nbr_lookup_by_routerid (struct route_table
 119                                                           *,
 120                                                           struct in_addr *);
 121 extern void ospf_renegotiate_optional_capabilities (struct ospf *top);
 122
 123 #endif /* _ZEBRA_OSPF_NEIGHBOR_H */