release/src/router/zebra/ospfd/ospf_nsm.h

   1 /*
   2  * OSPF version 2  Neighbor State Machine
   3  *   From RFC2328 [OSPF Version 2]
   4  *   Copyright (C) 1999 Toshiaki Takada
   5  *
   6  * This file is part of GNU Zebra.
   7  *
   8  * GNU Zebra is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * GNU Zebra is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  20  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  21  * 02111-1307, USA.
  22  */
  23
  24 #ifndef _ZEBRA_OSPF_NSM_H
  25 #define _ZEBRA_OSPF_NSM_H
  26
  27 /* OSPF Neighbor State Machine State. */
  28 #define NSM_DependUpon          0
  29 #define NSM_Down                1
  30 #define NSM_Attempt             2
  31 #define NSM_Init                3
  32 #define NSM_TwoWay              4
  33 #define NSM_ExStart             5
  34 #define NSM_Exchange            6
  35 #define NSM_Loading             7
  36 #define NSM_Full                8
  37 #define OSPF_NSM_STATE_MAX      9
  38
  39 /* OSPF Neighbor State Machine Event. */
  40 #define NSM_NoEvent             0
  41 #define NSM_HelloReceived       1
  42 #define NSM_Start               2
  43 #define NSM_TwoWayReceived      3
  44 #define NSM_NegotiationDone     4
  45 #define NSM_ExchangeDone        5
  46 #define NSM_BadLSReq            6
  47 #define NSM_LoadingDone         7
  48 #define NSM_AdjOK               8
  49 #define NSM_SeqNumberMismatch   9
  50 #define NSM_OneWayReceived     10
  51 #define NSM_KillNbr            11
  52 #define NSM_InactivityTimer    12
  53 #define NSM_LLDown             13
  54 #define OSPF_NSM_EVENT_MAX     14
  55
  56 /* Macro for OSPF NSM timer turn on. */
  57 #define OSPF_NSM_TIMER_ON(T,F,V)                                              \
  58       do {                                                                    \
  59         if (!(T))                                                             \
  60           (T) = thread_add_timer (master, (F), nbr, (V));                     \
  61       } while (0)
  62
  63 /* Macro for OSPF NSM timer turn off. */
  64 #define OSPF_NSM_TIMER_OFF(X)                                                 \
  65       do {                                                                    \
  66         if (X)                                                                \
  67           {                                                                   \
  68             thread_cancel (X);                                                \
  69             (X) = NULL;                                                       \
  70           }                                                                   \
  71       } while (0)
  72
  73 /* Macro for OSPF NSM schedule event. */
  74 #define OSPF_NSM_EVENT_SCHEDULE(N,E)                                          \
  75       thread_add_event (master, ospf_nsm_event, (N), (E))
  76
  77 /* Macro for OSPF NSM execute event. */
  78 #define OSPF_NSM_EVENT_EXECUTE(N,E)                                           \
  79       thread_execute (master, ospf_nsm_event, (N), (E))
  80
  81 /* Prototypes. */
  82 int ospf_nsm_event (struct thread *);
  83 void nsm_change_state (struct ospf_neighbor *, int);
  84 void ospf_check_nbr_loading (struct ospf_neighbor *);
  85 int ospf_db_summary_isempty (struct ospf_neighbor *);
  86 int ospf_db_summary_count (struct ospf_neighbor *);
  87 void ospf_db_summary_clear (struct ospf_neighbor *);
  88
  89 #endif /* _ZEBRA_OSPF_NSM_H */
  90