void
ospf_if_free (struct ospf_interface *oi)
{
ospf_if_down (oi);
assert (oi->state == ISM_Down);
#ifdef HAVE_OPAQUE_LSA
ospf_opaque_type9_lsa_term (oi);
#endif /* HAVE_OPAQUE_LSA */
/* Free Pseudo Neighbour */
ospf_nbr_delete (oi->nbr_self);
route_table_finish (oi->nbrs);
route_table_finish (oi->ls_upd_queue);
/* Free any lists that should be freed */
list_free (oi->nbr_nbma);
list_free (oi->ls_ack);
list_free (oi->ls_ack_direct.ls_ack);
ospf_delete_from_if (oi->ifp, oi);
listnode_delete (oi->ospf->oiflist, oi);
listnode_delete (oi->area->oiflist, oi);
memset (oi, 0, sizeof (*oi));
XFREE (MTYPE_OSPF_IF, oi);
}
int
nsm_kill_nbr (struct ospf_neighbor *nbr)
{
/* call it here because we cannot call it from ospf_nsm_event */
nsm_change_status (nbr, NSM_Down);
/* Reset neighbor. */
nsm_reset_nbr (nbr);
if (nbr->oi->type == OSPF_IFTYPE_NBMA && nbr->nbr_static != NULL)
{
struct ospf_nbr_static *nbr_static = nbr->nbr_static;
nbr_static->neighbor = NULL;
nbr_static->state_change = nbr->state_change;
nbr->nbr_static = NULL;
OSPF_POLL_TIMER_ON (nbr_static->t_poll, ospf_poll_timer,
nbr_static->v_poll);
if (IS_DEBUG_OSPF (nsm, NSM_EVENTS))
zlog_info ("NSM[%s:%s]: Down (PollIntervalTimer scheduled)",
IF_NAME (nbr->oi),
inet_ntoa (nbr->address.u.prefix4));
}
/* Delete neighbor from interface. */
ospf_nbr_delete (nbr);
return 0;
}
/* reset nbr_self */
void ospf_nbr_self_reset(struct ospf_interface *oi, struct in_addr router_id)
{
if (oi->nbr_self)
ospf_nbr_delete(oi->nbr_self);
oi->nbr_self = ospf_nbr_new(oi);
ospf_nbr_add_self(oi, router_id);
}
/* Restore an interface to its pre UP state
Used from ism_interface_down only */
void
ospf_if_cleanup (struct ospf_interface *oi)
{
struct route_node *rn;
struct listnode *node, *nnode;
struct ospf_neighbor *nbr;
struct ospf_nbr_nbma *nbr_nbma;
struct ospf_lsa *lsa;
/* oi->nbrs and oi->nbr_nbma should be deleted on InterfaceDown event */
/* delete all static neighbors attached to this interface */
for (ALL_LIST_ELEMENTS (oi->nbr_nbma, node, nnode, nbr_nbma))
{
OSPF_POLL_TIMER_OFF (nbr_nbma->t_poll);
if (nbr_nbma->nbr)
{
nbr_nbma->nbr->nbr_nbma = NULL;
nbr_nbma->nbr = NULL;
}
nbr_nbma->oi = NULL;
listnode_delete (oi->nbr_nbma, nbr_nbma);
}
/* send Neighbor event KillNbr to all associated neighbors. */
for (rn = route_top (oi->nbrs); rn; rn = route_next (rn))
if ((nbr = rn->info) != NULL)
if (nbr != oi->nbr_self)
OSPF_NSM_EVENT_EXECUTE (nbr, NSM_KillNbr);
/* Cleanup Link State Acknowlegdment list. */
for (ALL_LIST_ELEMENTS (oi->ls_ack, node, nnode, lsa))
ospf_lsa_unlock (&lsa); /* oi->ls_ack */
list_delete_all_node (oi->ls_ack);
oi->crypt_seqnum = 0;
/* Empty link state update queue */
ospf_ls_upd_queue_empty (oi);
/* Reset pseudo neighbor. */
ospf_nbr_delete (oi->nbr_self);
oi->nbr_self = ospf_nbr_new (oi);
ospf_nbr_add_self (oi);
ospf_lsa_unlock (&oi->network_lsa_self);
oi->network_lsa_self = NULL;
OSPF_TIMER_OFF (oi->t_network_lsa_self);
#ifdef HAVE_GRACEFUL_RESTART
THREAD_TIMER_OFF(oi->t_opaque_lsa_refresh);
oi->v_opaque_lsa_count = 0 ;
#endif
}
/* 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;
}
/* Restore an interface to its pre UP state
Used from ism_interface_down only */
void
ospf_if_cleanup (struct ospf_interface *oi)
{
struct route_node *rn;
struct listnode *node;
struct ospf_neighbor *nbr;
/* oi->nbrs and oi->nbr_nbma should be deletete on InterafceDown event */
/* delete all static neighbors attached to this interface */
for (node = listhead (oi->nbr_nbma); node; )
{
struct ospf_nbr_nbma *nbr_nbma = getdata (node);
nextnode (node);
OSPF_POLL_TIMER_OFF (nbr_nbma->t_poll);
if (nbr_nbma->nbr)
{
nbr_nbma->nbr->nbr_nbma = NULL;
nbr_nbma->nbr = NULL;
}
nbr_nbma->oi = NULL;
listnode_delete (oi->nbr_nbma, nbr_nbma);
}
/* send Neighbor event KillNbr to all associated neighbors. */
for (rn = route_top (oi->nbrs); rn; rn = route_next (rn))
if ((nbr = rn->info) != NULL)
if (nbr != oi->nbr_self)
OSPF_NSM_EVENT_EXECUTE (nbr, NSM_KillNbr);
/* Cleanup Link State Acknowlegdment list. */
for (node = listhead (oi->ls_ack); node; nextnode (node))
ospf_lsa_unlock (node->data);
list_delete_all_node (oi->ls_ack);
oi->crypt_seqnum = 0;
/* Empty link state update queue */
ospf_ls_upd_queue_empty (oi);
/* Handle pseudo neighbor. */
ospf_nbr_delete (oi->nbr_self);
oi->nbr_self = ospf_nbr_new (oi);
oi->nbr_self->state = NSM_TwoWay;
oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority);
switch (oi->area->external_routing)
{
case OSPF_AREA_DEFAULT:
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_STUB:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_NSSA:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_NP);
break;
}
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
