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70cd34749f
2005-11-16 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* ospf_ism.h: (OSPF_ISM_TIMER_OFF) Improve macro syntax by enclosing
in 'do {...} while(0)'.
115 lines
4.2 KiB
C
115 lines
4.2 KiB
C
/*
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* OSPF version 2 Interface 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_ISM_H
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#define _ZEBRA_OSPF_ISM_H
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/* OSPF Interface State Machine Status. */
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#define ISM_DependUpon 0
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#define ISM_Down 1
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#define ISM_Loopback 2
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#define ISM_Waiting 3
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#define ISM_PointToPoint 4
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#define ISM_DROther 5
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#define ISM_Backup 6
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#define ISM_DR 7
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#define OSPF_ISM_STATE_MAX 8
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/* Because DR/DROther values are exhanged wrt RFC */
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#define ISM_SNMP(x) (((x) == ISM_DROther) ? ISM_DR : \
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((x) == ISM_DR) ? ISM_DROther : (x))
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/* OSPF Interface State Machine Event. */
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#define ISM_NoEvent 0
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#define ISM_InterfaceUp 1
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#define ISM_WaitTimer 2
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#define ISM_BackupSeen 3
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#define ISM_NeighborChange 4
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#define ISM_LoopInd 5
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#define ISM_UnloopInd 6
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#define ISM_InterfaceDown 7
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#define OSPF_ISM_EVENT_MAX 8
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#define OSPF_ISM_WRITE_ON(O) \
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do \
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{ \
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if (oi->on_write_q == 0) \
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{ \
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listnode_add ((O)->oi_write_q, oi); \
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oi->on_write_q = 1; \
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} \
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if ((O)->t_write == NULL) \
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(O)->t_write = \
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thread_add_write (master, ospf_write, (O), (O)->fd); \
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} while (0)
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/* Macro for OSPF ISM timer turn on. */
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#define OSPF_ISM_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), oi, (V)); \
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} while (0)
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#define OSPF_ISM_TIMER_MSEC_ON(T,F,V) \
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do { \
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if (!(T)) \
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(T) = thread_add_timer_msec (master, (F), oi, (V)); \
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} while (0)
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/* convenience macro to set hello timer correctly, according to
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* whether fast-hello is set or not
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*/
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#define OSPF_HELLO_TIMER_ON(O) \
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do { \
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if (OSPF_IF_PARAM ((O), fast_hello)) \
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OSPF_ISM_TIMER_MSEC_ON ((O)->t_hello, ospf_hello_timer, \
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1000 / OSPF_IF_PARAM ((O), fast_hello)); \
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else \
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OSPF_ISM_TIMER_ON ((O)->t_hello, ospf_hello_timer, \
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OSPF_IF_PARAM ((O), v_hello)); \
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} while (0)
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/* Macro for OSPF ISM timer turn off. */
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#define OSPF_ISM_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 schedule event. */
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#define OSPF_ISM_EVENT_SCHEDULE(I,E) \
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thread_add_event (master, ospf_ism_event, (I), (E))
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/* Macro for OSPF execute event. */
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#define OSPF_ISM_EVENT_EXECUTE(I,E) \
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thread_execute (master, ospf_ism_event, (I), (E))
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/* Prototypes. */
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extern int ospf_ism_event (struct thread *);
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extern void ism_change_status (struct ospf_interface *, int);
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extern int ospf_hello_timer (struct thread *thread);
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#endif /* _ZEBRA_OSPF_ISM_H */
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