/* 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
}
void
ism_change_state (struct ospf_interface *oi, int state)
{
int old_state;
struct ospf_lsa *lsa;
/* Logging change of state. */
if (IS_DEBUG_OSPF (ism, ISM_STATUS))
zlog (NULL, LOG_DEBUG, "ISM[%s]: State change %s -> %s", IF_NAME (oi),
LOOKUP (ospf_ism_state_msg, oi->state),
LOOKUP (ospf_ism_state_msg, state));
old_state = oi->state;
oi->state = state;
oi->state_change++;
if (old_state == ISM_Down || state == ISM_Down)
ospf_check_abr_status (oi->ospf);
/* Originate router-LSA. */
if (oi->area)
{
if (state == ISM_Down)
{
if (oi->area->act_ints > 0)
oi->area->act_ints--;
}
else if (old_state == ISM_Down)
oi->area->act_ints++;
/* schedule router-LSA originate. */
ospf_router_lsa_timer_add (oi->area);
}
/* Originate network-LSA. */
if (old_state != ISM_DR && state == ISM_DR)
ospf_network_lsa_timer_add (oi);
else if (old_state == ISM_DR && state != ISM_DR)
{
/* Free self originated network LSA. */
lsa = oi->network_lsa_self;
if (lsa)
{
ospf_lsa_flush_area (lsa, oi->area);
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
}
#ifdef HAVE_OPAQUE_LSA
ospf_opaque_ism_change (oi, old_state);
#endif /* HAVE_OPAQUE_LSA */
/* Check area border status. */
ospf_check_abr_status (oi->ospf);
}
void
ism_change_status (struct ospf_interface *oi, int status)
{
int old_status;
struct ospf_lsa *lsa;
/* Logging change of status. */
if (IS_DEBUG_OSPF (ism, ISM_STATUS))
zlog (NULL, LOG_INFO, "ISM[%s]: Status change %s -> %s", IF_NAME (oi),
LOOKUP (ospf_ism_status_msg, oi->status),
LOOKUP (ospf_ism_status_msg, status));
old_status = oi->status;
oi->status = status;
oi->status_change++;
if (old_status == ISM_Down || status == NSM_Down)
ospf_check_abr_status();
/* Originate router-LSA. */
if (oi->area)
{
if (status == ISM_Down)
{
if (oi->area->act_ints > 0)
oi->area->act_ints--;
}
else if (old_status == ISM_Down)
oi->area->act_ints++;
/* schedule router-LSA originate. */
ospf_router_lsa_timer_add (oi->area);
}
/* Originate network-LSA. */
if (old_status != ISM_DR && status == ISM_DR)
ospf_network_lsa_timer_add (oi);
else if (old_status == ISM_DR && status != ISM_DR)
{
/* Free self originated network LSA. */
lsa = oi->network_lsa_self;
if (lsa)
{
ospf_lsa_flush_area (lsa, oi->area);
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
}
/* Preserve old status? */
/* Check area border status. */
ospf_check_abr_status ();
}
void
nsm_change_state (struct ospf_neighbor *nbr, int state)
{
struct ospf_interface *oi = nbr->oi;
struct ospf_area *vl_area = NULL;
u_char old_state;
int x;
int force = 1;
/* Logging change of status. */
if (IS_DEBUG_OSPF (nsm, NSM_STATUS))
zlog_debug ("NSM[%s:%s]: State change %s -> %s",
IF_NAME (nbr->oi), inet_ntoa (nbr->router_id),
LOOKUP (ospf_nsm_state_msg, nbr->state),
LOOKUP (ospf_nsm_state_msg, state));
/* Preserve old status. */
old_state = nbr->state;
/* Change to new status. */
nbr->state = state;
/* Statistics. */
nbr->state_change++;
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
vl_area = ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id);
/* One of the neighboring routers changes to/from the FULL state. */
if ((old_state != NSM_Full && state == NSM_Full) ||
(old_state == NSM_Full && state != NSM_Full))
{
if (state == NSM_Full)
{
oi->full_nbrs++;
oi->area->full_nbrs++;
ospf_check_abr_status (oi->ospf);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (++vl_area->full_vls == 1)
ospf_schedule_abr_task (oi->ospf);
/* kevinm: refresh any redistributions */
for (x = ZEBRA_ROUTE_SYSTEM; x < ZEBRA_ROUTE_MAX; x++)
{
if (x == ZEBRA_ROUTE_OSPF || x == ZEBRA_ROUTE_OSPF6)
continue;
ospf_external_lsa_refresh_type (oi->ospf, x, force);
}
}
else
{
oi->full_nbrs--;
oi->area->full_nbrs--;
ospf_check_abr_status (oi->ospf);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (vl_area->full_vls > 0)
if (--vl_area->full_vls == 0)
ospf_schedule_abr_task (oi->ospf);
/* clear neighbor retransmit list */
if (!ospf_ls_retransmit_isempty (nbr))
ospf_ls_retransmit_clear (nbr);
}
zlog_info ("nsm_change_state(%s, %s -> %s): "
"scheduling new router-LSA origination",
inet_ntoa (nbr->router_id),
LOOKUP(ospf_nsm_state_msg, old_state),
LOOKUP(ospf_nsm_state_msg, state));
ospf_router_lsa_timer_add (oi->area);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
{
struct ospf_area *vl_area =
ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id);
if (vl_area)
ospf_router_lsa_timer_add (vl_area);
}
/* Originate network-LSA. */
if (oi->state == ISM_DR)
{
if (oi->network_lsa_self && oi->full_nbrs == 0)
{
ospf_lsa_flush_area (oi->network_lsa_self, oi->area);
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
else
ospf_network_lsa_timer_add (oi);
}
}
#ifdef HAVE_OPAQUE_LSA
ospf_opaque_nsm_change (nbr, old_state);
#endif /* HAVE_OPAQUE_LSA */
/* Start DD exchange protocol */
if (state == NSM_ExStart)
{
if (nbr->dd_seqnum == 0)
nbr->dd_seqnum = time (NULL);
else
nbr->dd_seqnum++;
nbr->dd_flags = OSPF_DD_FLAG_I|OSPF_DD_FLAG_M|OSPF_DD_FLAG_MS;
ospf_db_desc_send (nbr);
}
/* clear cryptographic sequence number */
if (state == NSM_Down)
nbr->crypt_seqnum = 0;
/* Generete NeighborChange ISM event. */
#ifdef BUGGY_ISM_TRANSITION
if ((old_state < NSM_TwoWay && state >= NSM_TwoWay) ||
(old_state >= NSM_TwoWay && state < NSM_TwoWay))
OSPF_ISM_EVENT_EXECUTE (oi, ISM_NeighborChange);
#else /* BUGGY_ISM_TRANSITION */
switch (oi->state) {
case ISM_DROther:
case ISM_Backup:
case ISM_DR:
if ((old_state < NSM_TwoWay && state >= NSM_TwoWay) ||
(old_state >= NSM_TwoWay && state < NSM_TwoWay))
OSPF_ISM_EVENT_EXECUTE (oi, ISM_NeighborChange);
break;
default:
/* ISM_PointToPoint -> ISM_Down, ISM_Loopback -> ISM_Down, etc. */
break;
}
#endif /* BUGGY_ISM_TRANSITION */
/* Performance hack. Send hello immideately when some neighbor enter
Init state. This whay we decrease neighbor discovery time. Gleb.*/
if (state == NSM_Init)
{
OSPF_ISM_TIMER_OFF (oi->t_hello);
OSPF_ISM_TIMER_ON (oi->t_hello, ospf_hello_timer, 1);
}
/* Preserve old status? */
}
static void
ism_change_state (struct ospf_interface *oi, int state)
{
int old_state;
struct ospf_lsa *lsa;
/* Logging change of state. */
if (IS_DEBUG_OSPF (ism, ISM_STATUS))
zlog (NULL, LOG_DEBUG, "ISM[%s]: State change %s -> %s", IF_NAME (oi),
LOOKUP (ospf_ism_state_msg, oi->state),
LOOKUP (ospf_ism_state_msg, state));
old_state = oi->state;
oi->state = state;
oi->state_change++;
#ifdef HAVE_SNMP
/* Terminal state or regression */
if ((state == ISM_DR) || (state == ISM_Backup) || (state == ISM_DROther) ||
(state == ISM_PointToPoint) || (state < old_state))
{
/* ospfVirtIfStateChange */
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
ospfTrapVirtIfStateChange (oi);
/* ospfIfStateChange */
else
ospfTrapIfStateChange (oi);
}
#endif
/* Set multicast memberships appropriately for new state. */
ospf_if_set_multicast(oi);
if (old_state == ISM_Down || state == ISM_Down)
ospf_check_abr_status (oi->ospf);
/* Originate router-LSA. */
if (state == ISM_Down)
{
if (oi->area->act_ints > 0)
oi->area->act_ints--;
}
else if (old_state == ISM_Down)
oi->area->act_ints++;
/* schedule router-LSA originate. */
ospf_router_lsa_update_area (oi->area);
/* Originate network-LSA. */
if (old_state != ISM_DR && state == ISM_DR)
ospf_network_lsa_update (oi);
else if (old_state == ISM_DR && state != ISM_DR)
{
/* Free self originated network LSA. */
lsa = oi->network_lsa_self;
if (lsa)
ospf_lsa_flush_area (lsa, oi->area);
ospf_lsa_unlock (&oi->network_lsa_self);
oi->network_lsa_self = NULL;
}
ospf_opaque_ism_change (oi, old_state);
/* Check area border status. */
ospf_check_abr_status (oi->ospf);
}
static void
nsm_change_state (struct ospf_neighbor *nbr, int state)
{
struct ospf_interface *oi = nbr->oi;
struct ospf_area *vl_area = NULL;
u_char old_state;
int x;
int force = 1;
/* Preserve old status. */
old_state = nbr->state;
/* Change to new status. */
nbr->state = state;
/* Statistics. */
nbr->state_change++;
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
vl_area = ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id);
/* One of the neighboring routers changes to/from the FULL state. */
if ((old_state != NSM_Full && state == NSM_Full) ||
(old_state == NSM_Full && state != NSM_Full))
{
if (state == NSM_Full)
{
oi->full_nbrs++;
oi->area->full_nbrs++;
ospf_check_abr_status (oi->ospf);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (++vl_area->full_vls == 1)
ospf_schedule_abr_task (oi->ospf);
/* kevinm: refresh any redistributions */
for (x = ZEBRA_ROUTE_SYSTEM; x < ZEBRA_ROUTE_MAX; x++)
{
if (x == ZEBRA_ROUTE_OSPF || x == ZEBRA_ROUTE_OSPF6)
continue;
ospf_external_lsa_refresh_type (oi->ospf, x, force);
}
/* XXX: Clearly some thing is wrong with refresh of external LSAs
* this added to hack around defaults not refreshing after a timer
* jump.
*/
ospf_external_lsa_refresh_default (oi->ospf);
}
else
{
oi->full_nbrs--;
oi->area->full_nbrs--;
ospf_check_abr_status (oi->ospf);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (vl_area->full_vls > 0)
if (--vl_area->full_vls == 0)
ospf_schedule_abr_task (oi->ospf);
}
zlog_info ("nsm_change_state(%s, %s -> %s): "
"scheduling new router-LSA origination",
inet_ntoa (nbr->router_id),
LOOKUP(ospf_nsm_state_msg, old_state),
LOOKUP(ospf_nsm_state_msg, state));
ospf_router_lsa_update_area (oi->area);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
{
struct ospf_area *vl_area =
ospf_area_lookup_by_area_id (oi->ospf, oi->vl_data->vl_area_id);
if (vl_area)
ospf_router_lsa_update_area (vl_area);
}
/* Originate network-LSA. */
if (oi->state == ISM_DR)
{
if (oi->network_lsa_self && oi->full_nbrs == 0)
{
ospf_lsa_flush_area (oi->network_lsa_self, oi->area);
ospf_lsa_unlock (&oi->network_lsa_self);
oi->network_lsa_self = NULL;
}
else
ospf_network_lsa_update (oi);
}
}
#ifdef HAVE_OPAQUE_LSA
ospf_opaque_nsm_change (nbr, old_state);
#endif /* HAVE_OPAQUE_LSA */
/* State changes from > ExStart to <= ExStart should clear any Exchange
* or Full/LSA Update related lists and state.
* Potential causal events: BadLSReq, SeqNumberMismatch, AdjOK?
*/
if ((old_state > NSM_ExStart) && (state <= NSM_ExStart))
nsm_clear_adj (nbr);
/* Start DD exchange protocol */
if (state == NSM_ExStart)
{
if (nbr->dd_seqnum == 0)
nbr->dd_seqnum = quagga_time (NULL);
else
nbr->dd_seqnum++;
nbr->dd_flags = OSPF_DD_FLAG_I|OSPF_DD_FLAG_M|OSPF_DD_FLAG_MS;
ospf_db_desc_send (nbr);
}
/* clear cryptographic sequence number */
if (state == NSM_Down)
nbr->crypt_seqnum = 0;
/* Generete NeighborChange ISM event. */
switch (oi->state) {
case ISM_DROther:
case ISM_Backup:
case ISM_DR:
if ((old_state < NSM_TwoWay && state >= NSM_TwoWay) ||
(old_state >= NSM_TwoWay && state < NSM_TwoWay))
OSPF_ISM_EVENT_EXECUTE (oi, ISM_NeighborChange);
break;
default:
/* ISM_PointToPoint -> ISM_Down, ISM_Loopback -> ISM_Down, etc. */
break;
}
/* Preserve old status? */
}
/* 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);
}
void
nsm_change_status (struct ospf_neighbor *nbr, int status)
{
int old_status;
struct ospf_interface *oi;
struct ospf_area *vl_area = NULL;
/* Logging change of status. */
if (IS_DEBUG_OSPF (nsm, NSM_STATUS))
zlog_info ("NSM[%s:%s]: Status change %s -> %s",
IF_NAME (nbr->oi), inet_ntoa (nbr->router_id),
LOOKUP (ospf_nsm_status_msg, nbr->status),
LOOKUP (ospf_nsm_status_msg, status));
/* Preserve old status. */
old_status = nbr->status;
/* Change to new status. */
nbr->status = status;
/* Statistics. */
nbr->state_change++;
oi = nbr->oi;
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
vl_area = ospf_area_lookup_by_area_id (oi->vl_data->vl_area_id);
/* One of the neighboring routers changes to/from the FULL state. */
if ((old_status != NSM_Full && status == NSM_Full) ||
(old_status == NSM_Full && status != NSM_Full))
{
if (status == NSM_Full)
{
oi->full_nbrs++;
oi->area->full_nbrs++;
ospf_check_abr_status ();
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (++vl_area->full_vls == 1)
ospf_schedule_abr_task ();
}
else
{
oi->full_nbrs--;
oi->area->full_nbrs--;
ospf_check_abr_status ();
if (oi->type == OSPF_IFTYPE_VIRTUALLINK && vl_area)
if (vl_area->full_vls > 0)
if (--vl_area->full_vls == 0)
ospf_schedule_abr_task ();
/* clear neighbor retransmit list */
if (!ospf_ls_retransmit_isempty (nbr))
ospf_ls_retransmit_clear (nbr);
}
zlog_info ("nsm_change_status(): "
"scheduling new router-LSA origination");
ospf_router_lsa_timer_add (oi->area);
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
{
struct ospf_area *vl_area =
ospf_area_lookup_by_area_id (oi->vl_data->vl_area_id);
if (vl_area)
ospf_router_lsa_timer_add (vl_area);
}
/* Originate network-LSA. */
if (oi->status == ISM_DR)
{
if (oi->network_lsa_self && oi->full_nbrs == 0)
{
ospf_lsa_flush_area (oi->network_lsa_self, oi->area);
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
else
ospf_network_lsa_timer_add (oi);
}
}
/* Start DD exchange protocol */
if (status == NSM_ExStart)
{
if (nbr->dd_seqnum == 0)
nbr->dd_seqnum = time (NULL);
else
nbr->dd_seqnum++;
nbr->dd_flags = OSPF_DD_FLAG_I|OSPF_DD_FLAG_M|OSPF_DD_FLAG_MS;
ospf_db_desc_send (nbr);
}
/* clear cryptographic sequence number */
if (status == NSM_Down)
nbr->crypt_seqnum = 0;
/* Generete NeighborChange ISM event. */
if ((old_status < NSM_TwoWay && status >= NSM_TwoWay) ||
(old_status >= NSM_TwoWay && status < NSM_TwoWay))
OSPF_ISM_EVENT_EXECUTE (oi, ISM_NeighborChange);
/* Performance hack. Send hello immideately when some neighbor enter
Init state. This whay we decrease neighbor discovery time. Gleb.*/
if (status == NSM_Init)
{
OSPF_ISM_TIMER_OFF (oi->t_hello);
OSPF_ISM_TIMER_ON (oi->t_hello, ospf_hello_timer, 1);
}
/* Preserve old status? */
}
