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/*
* OSPF version 2 Interface State Machine.
* From RFC2328 [OSPF Version 2]
* Copyright (C) 1999 Toshiaki Takada
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _ZEBRA_OSPF_ISM_H
#define _ZEBRA_OSPF_ISM_H
/* OSPF Interface State Machine Status. */
#define ISM_DependUpon 0
#define ISM_Down 1
#define ISM_Loopback 2
#define ISM_Waiting 3
#define ISM_PointToPoint 4
#define ISM_DROther 5
#define ISM_Backup 6
#define ISM_DR 7
#define OSPF_ISM_STATE_MAX 8
/* Because DR/DROther values are exhanged wrt RFC */
#define ISM_SNMP(x) (((x) == ISM_DROther) ? ISM_DR : \
((x) == ISM_DR) ? ISM_DROther : (x))
/* OSPF Interface State Machine Event. */
#define ISM_NoEvent 0
#define ISM_InterfaceUp 1
#define ISM_WaitTimer 2
#define ISM_BackupSeen 3
#define ISM_NeighborChange 4
#define ISM_LoopInd 5
#define ISM_UnloopInd 6
#define ISM_InterfaceDown 7
#define OSPF_ISM_EVENT_MAX 8
#define OSPF_ISM_WRITE_ON(O) \
do \
{ \
if (oi->on_write_q == 0) \
{ \
listnode_add ((O)->oi_write_q, oi); \
oi->on_write_q = 1; \
} \
if ((O)->t_write == NULL) \
(O)->t_write = \
thread_add_write (master, ospf_write, (O), (O)->fd); \
} while (0)
/* Macro for OSPF ISM timer turn on. */
#define OSPF_ISM_TIMER_ON(T,F,V) \
do { \
if (!(T)) \
(T) = thread_add_timer (master, (F), oi, (V)); \
} while (0)
#define OSPF_ISM_TIMER_MSEC_ON(T,F,V) \
do { \
if (!(T)) \
(T) = thread_add_timer_msec (master, (F), oi, (V)); \
} while (0)
/* convenience macro to set hello timer correctly, according to
* whether fast-hello is set or not
*/
#define OSPF_HELLO_TIMER_ON(O) \
do { \
if (OSPF_IF_PARAM ((O), fast_hello)) \
OSPF_ISM_TIMER_MSEC_ON ((O)->t_hello, ospf_hello_timer, \
1000 / OSPF_IF_PARAM ((O), fast_hello)); \
else \
OSPF_ISM_TIMER_ON ((O)->t_hello, ospf_hello_timer, \
OSPF_IF_PARAM ((O), v_hello)); \
} while (0)
/* Macro for OSPF ISM timer turn off. */
#define OSPF_ISM_TIMER_OFF(X) \
do { \
if (X) \
{ \
thread_cancel (X); \
(X) = NULL; \
} \
} while (0)
/* Macro for OSPF schedule event. */
#define OSPF_ISM_EVENT_SCHEDULE(I,E) \
thread_add_event (master, ospf_ism_event, (I), (E))
/* Macro for OSPF execute event. */
#define OSPF_ISM_EVENT_EXECUTE(I,E) \
thread_execute (master, ospf_ism_event, (I), (E))
/* Prototypes. */
extern int ospf_ism_event (struct thread *);
extern void ism_change_status (struct ospf_interface *, int);
extern int ospf_hello_timer (struct thread *thread);
#endif /* _ZEBRA_OSPF_ISM_H */
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