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2006-07-07 Paul Jakma <paul.jakma@sun.com> * ospf_nsm.h: Add a NSM_Deleted neighbour state, to act as dummy state indicating the neighbour is to be deleted. * ospf_nsm.c: (general) Use the NSM_Deleted state to delete neighbours, thus allowing code to be slightly more obvious in its flow. (nsm_timer_set) Add NSM_Deleted. Add another timer the code missed. (nsm_kill_nbr) No need for special case call to nsm_change_state anymore. Make the assert and error-handling for same case more readable (Andrew Schorr) Remove the call to ospf_nbr_delete, nsm_change_state can do this generally now via NSM_Deleted. (struct ... NSM) Add the dummy NSM_Deleted state, the 3 events that can lead to nsm_kill_nbr all now transition the NBR to NSM_Deleted and the general change_state function can be left to do the work. (ospf_nsm_event) Special casing of events and early-return can be removed now. On transition into Deleted, delete the nbr. * ospf_dump.c: (ospf_nsm_state_msg) Add Deleted.
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/*
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* OSPF version 2 Neighbor State Machine
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* From RFC2328 [OSPF Version 2]
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* Copyright (C) 1999 Toshiaki Takada
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_OSPF_NSM_H
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#define _ZEBRA_OSPF_NSM_H
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/* OSPF Neighbor State Machine State. */
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#define NSM_DependUpon 0
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#define NSM_Deleted 1
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#define NSM_Down 2
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#define NSM_Attempt 3
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#define NSM_Init 4
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#define NSM_TwoWay 5
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#define NSM_ExStart 6
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#define NSM_Exchange 7
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#define NSM_Loading 8
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#define NSM_Full 9
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#define OSPF_NSM_STATE_MAX 10
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/* OSPF Neighbor State Machine Event. */
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#define NSM_NoEvent 0
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#define NSM_HelloReceived 1
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#define NSM_Start 2
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#define NSM_TwoWayReceived 3
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#define NSM_NegotiationDone 4
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#define NSM_ExchangeDone 5
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#define NSM_BadLSReq 6
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#define NSM_LoadingDone 7
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#define NSM_AdjOK 8
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#define NSM_SeqNumberMismatch 9
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#define NSM_OneWayReceived 10
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#define NSM_KillNbr 11
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#define NSM_InactivityTimer 12
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#define NSM_LLDown 13
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#define OSPF_NSM_EVENT_MAX 14
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/* Macro for OSPF NSM timer turn on. */
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#define OSPF_NSM_TIMER_ON(T,F,V) \
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do { \
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if (!(T)) \
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(T) = thread_add_timer (master, (F), nbr, (V)); \
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} while (0)
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/* Macro for OSPF NSM timer turn off. */
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#define OSPF_NSM_TIMER_OFF(X) \
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do { \
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if (X) \
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{ \
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thread_cancel (X); \
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(X) = NULL; \
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} \
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} while (0)
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/* Macro for OSPF NSM schedule event. */
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#define OSPF_NSM_EVENT_SCHEDULE(N,E) \
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thread_add_event (master, ospf_nsm_event, (N), (E))
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/* Macro for OSPF NSM execute event. */
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#define OSPF_NSM_EVENT_EXECUTE(N,E) \
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thread_execute (master, ospf_nsm_event, (N), (E))
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/* Prototypes. */
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extern int ospf_nsm_event (struct thread *);
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extern void nsm_change_state (struct ospf_neighbor *, int);
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extern void ospf_check_nbr_loading (struct ospf_neighbor *);
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extern int ospf_db_summary_isempty (struct ospf_neighbor *);
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extern int ospf_db_summary_count (struct ospf_neighbor *);
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extern void ospf_db_summary_clear (struct ospf_neighbor *);
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#endif /* _ZEBRA_OSPF_NSM_H */
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