/* Execute ISM event process. */
int
ospf_ism_event (struct thread *thread)
{
int event;
int next_state;
struct ospf_interface *oi;
oi = THREAD_ARG (thread);
event = THREAD_VAL (thread);
/* Call function. */
next_state = (*(ISM [oi->state][event].func))(oi);
if (! next_state)
next_state = ISM [oi->state][event].next_state;
if (IS_DEBUG_OSPF (ism, ISM_EVENTS))
zlog (NULL, LOG_DEBUG, "ISM[%s]: %s (%s)", IF_NAME (oi),
LOOKUP (ospf_ism_state_msg, oi->state),
ospf_ism_event_str[event]);
/* If state is changed. */
if (next_state != oi->state)
ism_change_state (oi, next_state);
/* Make sure timer is set. */
ism_timer_set (oi);
return 0;
}
/* 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;
}
/* BGP connect retry timer. */
static int
bgp_connect_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_connect = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG, "%s [FSM] Timer (connect timer expire)",
peer->host);
THREAD_VAL (thread) = ConnectRetry_timer_expired;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP start timer. This function set BGP_Start event to thread value
and process event. */
static int
bgp_start_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_start = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (start timer expire).", peer->host);
THREAD_VAL (thread) = BGP_Start;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP keepalive fire ! */
static int
bgp_keepalive_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_keepalive = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (keepalive timer expire)",
peer->host);
THREAD_VAL (thread) = KeepAlive_timer_expired;
bgp_event (thread); /* bgp_event unlocks peer */
return 0;
}
/* BGP holdtime timer. */
static int
bgp_holdtime_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_holdtime = NULL;
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (holdtime timer expire)",
peer->host);
THREAD_VAL (thread) = Hold_Timer_expired;
bgp_event (thread);
return 0;
}
/* Execute event process. */
int
bgp_event (struct thread *thread)
{
int ret = 0;
int event;
int next;
struct peer *peer;
peer = THREAD_ARG (thread);
event = THREAD_VAL (thread);
/* Logging this event. */
next = FSM [peer->status -1][event - 1].next_state;
if (BGP_DEBUG (fsm, FSM) && peer->status != next)
plog_debug (peer->log, "%s [FSM] %s (%s->%s)", peer->host,
bgp_event_str[event],
LOOKUP (bgp_status_msg, peer->status),
LOOKUP (bgp_status_msg, next));
/* Call function. */
if (FSM [peer->status -1][event - 1].func)
ret = (*(FSM [peer->status - 1][event - 1].func))(peer);
/* When function do not want proceed next job return -1. */
if (ret >= 0)
{
/* If status is changed. */
if (next != peer->status)
{
/* Transition into Clearing must /always/ clear all routes.. */
if (next == Clearing)
bgp_clear_route_all (peer);
bgp_fsm_change_status (peer, next);
}
/* Make sure timer is set. */
bgp_timer_set (peer);
}
return ret;
}
/* BGP start timer. This function set BGP_Start event to thread value
and process event. */
static int
bgp_start_timer (struct thread *thread)
{
struct peer *peer;
peer = THREAD_ARG (thread);
peer->t_start = NULL;
UNSET_FLAG (peer->sflags, PEER_STATUS_CREATE_INIT);
if (BGP_DEBUG (fsm, FSM))
zlog (peer->log, LOG_DEBUG,
"%s [FSM] Timer (start timer expire).", peer->host);
THREAD_VAL (thread) = BGP_Start;
bgp_event (thread);
return 0;
}
/* Execute event process. */
int
bgp_event (struct thread *thread)
{
int ret;
int event;
int next;
struct peer *peer;
peer = THREAD_ARG (thread);
event = THREAD_VAL (thread);
/* Logging this event. */
next = FSM [peer->status -1][event - 1].next_state;
if (BGP_DEBUG (fsm, FSM))
plog_info (peer->log, "%s [FSM] %s (%s->%s)", peer->host,
bgp_event_str[event],
LOOKUP (bgp_status_msg, peer->status),
LOOKUP (bgp_status_msg, next));
if (BGP_DEBUG (normal, NORMAL)
&& strcmp (LOOKUP (bgp_status_msg, peer->status), LOOKUP (bgp_status_msg, next)))
zlog_info ("%s went from %s to %s",
peer->host,
LOOKUP (bgp_status_msg, peer->status),
LOOKUP (bgp_status_msg, next));
/* Call function. */
ret = (*(FSM [peer->status - 1][event - 1].func))(peer);
/* When function do not want proceed next job return -1. */
if (ret < 0)
return ret;
/* If status is changed. */
if (next != peer->status)
bgp_fsm_change_status (peer, next);
/* Make sure timer is set. */
bgp_timer_set (peer);
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;
}
