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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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_OSPF_ISM_H
#define _ZEBRA_OSPF_ISM_H
#include "hook.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
/* 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 (!list_isempty((O)->oi_write_q)) \
thread_add_write(master, ospf_write, (O), (O)->fd, \
&(O)->t_write); \
} while (0)
/* Macro for OSPF ISM timer turn on. */
#define OSPF_ISM_TIMER_ON(T, F, V) thread_add_timer(master, (F), oi, (V), &(T))
#define OSPF_ISM_TIMER_MSEC_ON(T, F, V) \
thread_add_timer_msec(master, (F), oi, (V), &(T))
/* 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) thread_cancel(&(X))
/* Macro for OSPF schedule event. */
#define OSPF_ISM_EVENT_SCHEDULE(I, E) \
thread_add_event(master, ospf_ism_event, (I), (E), NULL)
/* 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);
extern int ospf_dr_election(struct ospf_interface *oi);
DECLARE_HOOK(ospf_ism_change,
(struct ospf_interface * oi, int state, int oldstate),
(oi, state, oldstate))
#endif /* _ZEBRA_OSPF_ISM_H */
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