/* Execute NSM event process. */
int
ospf_nsm_event (struct thread *thread)
{
int event;
int next_state;
struct ospf_neighbor *nbr;
struct in_addr router_id;
int old_state;
struct ospf_interface *oi;
nbr = THREAD_ARG (thread);
event = THREAD_VAL (thread);
router_id = nbr->router_id;
old_state = nbr->state;
oi = nbr->oi ;
/* Call function. */
next_state = (*(NSM [nbr->state][event].func))(nbr);
/* When event is NSM_KillNbr or InactivityTimer, the neighbor is
deleted. */
if (event == NSM_KillNbr || event == NSM_InactivityTimer)
{
if (IS_DEBUG_OSPF (nsm, NSM_EVENTS))
zlog_debug ("NSM[%s:%s]: neighbor deleted",
IF_NAME (oi), inet_ntoa (router_id));
/* Timers are canceled in ospf_nbr_free, moreover we cannot call
nsm_timer_set here because nbr is freed already!!!*/
/*nsm_timer_set (nbr);*/
return 0;
}
if (! next_state)
next_state = NSM [nbr->state][event].next_state;
if (IS_DEBUG_OSPF (nsm, NSM_EVENTS))
zlog_debug ("NSM[%s:%s]: %s (%s)", IF_NAME (oi),
inet_ntoa (nbr->router_id),
LOOKUP (ospf_nsm_state_msg, nbr->state),
ospf_nsm_event_str [event]);
/* If state is changed. */
if (next_state != nbr->state)
nsm_change_state (nbr, next_state);
/* Make sure timer is set. */
nsm_timer_set (nbr);
return 0;
}
/* Execute NSM event process. */
int
ospf_nsm_event (struct thread *thread)
{
int event;
int next_state;
struct ospf_neighbor *nbr;
nbr = THREAD_ARG (thread);
event = THREAD_VAL (thread);
if (IS_DEBUG_OSPF (nsm, NSM_EVENTS))
zlog_debug ("NSM[%s:%s]: %s (%s)", IF_NAME (nbr->oi),
inet_ntoa (nbr->router_id),
LOOKUP (ospf_nsm_state_msg, nbr->state),
ospf_nsm_event_str [event]);
next_state = NSM [nbr->state][event].next_state;
/* Call function. */
if (NSM [nbr->state][event].func != NULL)
{
int func_state = (*(NSM [nbr->state][event].func))(nbr);
if (NSM [nbr->state][event].next_state == NSM_DependUpon)
next_state = func_state;
else if (func_state)
{
/* There's a mismatch between the FSM tables and what an FSM
* action/state-change function returned. State changes which
* do not have conditional/DependUpon next-states should not
* try set next_state.
*/
zlog_warn ("NSM[%s:%s]: %s (%s): "
"Warning: action tried to change next_state to %s",
IF_NAME (nbr->oi), inet_ntoa (nbr->router_id),
LOOKUP (ospf_nsm_state_msg, nbr->state),
ospf_nsm_event_str [event],
LOOKUP (ospf_nsm_state_msg, func_state));
}
}
assert (next_state != NSM_DependUpon);
/* If state is changed. */
if (next_state != nbr->state)
{
nsm_notice_state_change (nbr, next_state, event);
nsm_change_state (nbr, next_state);
}
/* Make sure timer is set. */
nsm_timer_set (nbr);
/* When event is NSM_KillNbr, InactivityTimer or LLDown, the neighbor
* is deleted.
*
* Rather than encode knowledge here of which events lead to NBR
* delete, we take our cue from the NSM table, via the dummy
* 'Deleted' neighbour state.
*/
if (nbr->state == NSM_Deleted)
ospf_nbr_delete (nbr);
return 0;
}
