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
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? */
}