release/src/router/zebra/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 /* Neighbor Data Structure */
  27 struct ospf_neighbor
  28 {
  29   /* This neighbor's parent ospf interface. */
  30   struct ospf_interface *oi;
  31
  32   /* OSPF neighbor Information */
  33   u_char state;                         /* NSM status. */
  34   u_char dd_flags;                      /* DD bit flags. */
  35   u_int32_t dd_seqnum;                  /* DD Sequence Number. */
  36
  37   /* Neighbor Information from Hello. */
  38   struct prefix address;                /* Neighbor Interface Address. */
  39
  40   struct in_addr src;                   /* Src address. */
  41   struct in_addr router_id;             /* Router ID. */
  42   u_char options;                       /* Options. */
  43   int priority;                         /* Router Priority. */
  44   struct in_addr d_router;              /* Designated Router. */
  45   struct in_addr bd_router;             /* Backup Designated Router. */
  46
  47   /* Last sent Database Description packet. */
  48   struct ospf_packet *last_send;
  49   /* Timestemp when last Database Description packet was sent */
  50   struct timeval last_send_ts;
  51
  52   /* Last received Databse Description packet. */
  53   struct
  54   {
  55     u_char options;
  56     u_char flags;
  57     u_int32_t dd_seqnum;
  58   } last_recv;
  59
  60   /* LSA data. */
  61   struct ospf_lsdb ls_rxmt;
  62   struct ospf_lsdb db_sum;
  63   struct ospf_lsdb ls_req;
  64   struct ospf_lsa *ls_req_last;
  65
  66   u_int32_t crypt_seqnum;           /* Cryptographic Sequence Number. */
  67
  68   /* Timer values. */
  69   u_int32_t v_inactivity;
  70   u_int32_t v_db_desc;
  71   u_int32_t v_ls_req;
  72   u_int32_t v_ls_upd;
  73
  74   /* Threads. */
  75   struct thread *t_inactivity;
  76   struct thread *t_db_desc;
  77   struct thread *t_ls_req;
  78   struct thread *t_ls_upd;
  79   struct thread *t_hello_reply;
  80
  81   /* Statistics Field */
  82   u_int32_t state_change;
  83   struct ospf_nbr_nbma *nbr_nbma;
  84 };
  85
  86 /* Macros. */
  87 #define NBR_IS_DR(n)    IPV4_ADDR_SAME (&n->address.u.prefix4, &n->d_router)
  88 #define NBR_IS_BDR(n)   IPV4_ADDR_SAME (&n->address.u.prefix4, &n->bd_router)
  89
  90 /* Prototypes. */
  91 struct ospf_neighbor *ospf_nbr_new (struct ospf_interface *);
  92 void ospf_nbr_free (struct ospf_neighbor *);
  93 void ospf_nbr_delete (struct ospf_neighbor *);
  94 int ospf_nbr_bidirectional (struct in_addr *, struct in_addr *, int);
  95 void ospf_nbr_add_self (struct ospf_interface *);
  96 int ospf_nbr_count (struct ospf_interface *, int);
  97 #ifdef HAVE_OPAQUE_LSA
  98 int ospf_nbr_count_opaque_capable (struct ospf_interface *);
  99 #endif /* HAVE_OPAQUE_LSA */
 100 struct ospf_neighbor *ospf_nbr_lookup_by_addr (struct route_table *,
 101                                                struct in_addr *);
 102 struct ospf_neighbor *ospf_nbr_lookup_by_routerid (struct route_table *,
 103                                                    struct in_addr *);
 104 void ospf_renegotiate_optional_capabilities (struct ospf *top);
 105
 106 #endif /* _ZEBRA_OSPF_NEIGHBOR_H */