int
ospf_area_range_substitute_unset (struct ospf *ospf, struct in_addr area_id,
struct prefix_ipv4 *p)
{
struct ospf_area *area;
struct ospf_area_range *range;
area = ospf_area_lookup_by_area_id (ospf, area_id);
if (area == NULL)
return 0;
range = ospf_area_range_lookup (area, p);
if (range == NULL)
return 0;
if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
if (ospf_area_range_active (range))
ospf_schedule_abr_task (ospf);
UNSET_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE);
range->subst_addr.s_addr = 0;
range->subst_masklen = 0;
return 1;
}
int
ospf_abr_should_announce (struct ospf *ospf,
struct prefix *p, struct ospf_route *or)
{
struct ospf_area *area;
area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id);
assert (area);
if (EXPORT_NAME (area))
{
if (EXPORT_LIST (area) == NULL)
EXPORT_LIST (area) = access_list_lookup (AFI_IP, EXPORT_NAME (area));
if (EXPORT_LIST (area))
if (access_list_apply (EXPORT_LIST (area), p) == FILTER_DENY)
return 0;
}
return 1;
}
int
ospf_area_range_unset (struct ospf *ospf, struct in_addr area_id,
struct prefix_ipv4 *p)
{
struct ospf_area *area;
struct ospf_area_range *range;
area = ospf_area_lookup_by_area_id (ospf, area_id);
if (area == NULL)
return 0;
range = ospf_area_range_lookup (area, p);
if (range == NULL)
return 0;
if (ospf_area_range_active (range))
ospf_schedule_abr_task (ospf);
ospf_area_range_delete (area, range);
return 1;
}
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? */
}
static void
ospf_ia_router_route (struct ospf *ospf, struct route_table *rtrs,
struct prefix_ipv4 *p,
struct ospf_route *new_or, struct ospf_route *abr_or)
{
struct ospf_route *or = NULL;
struct route_node *rn;
int ret;
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_router_route(): considering %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
/* Find a route to the same dest */
rn = route_node_get (rtrs, (struct prefix *) p);
if (rn->info == NULL)
/* This is a new route */
rn->info = list_new ();
else
{
struct ospf_area *or_area;
or_area = ospf_area_lookup_by_area_id (ospf, new_or->u.std.area_id);
assert (or_area);
/* This is an additional route */
route_unlock_node (rn);
or = ospf_find_asbr_route_through_area (rtrs, p, or_area);
}
if (or)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_router_route(): "
"a route to the same ABR through the same area exists");
/* New route is better */
if ((ret = ospf_route_cmp (ospf, new_or, or)) < 0)
{
listnode_delete (rn->info, or);
ospf_route_free (or);
/* proceed down */
}
/* Routes are the same */
else if (ret == 0)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_router_route(): merging the new route");
ospf_route_copy_nexthops (or, abr_or->paths);
ospf_route_free (new_or);
return;
}
/* New route is worse */
else
{
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_router_route(): skipping the new route");
ospf_route_free (new_or);
return;
}
}
ospf_route_copy_nexthops (new_or, abr_or->paths);
if (IS_DEBUG_OSPF_EVENT)
zlog_debug ("ospf_ia_router_route(): adding the new route");
listnode_add (rn->info, new_or);
}
void
ospf_abr_process_network_rt (struct ospf *ospf,
struct route_table *rt)
{
struct ospf_area *area;
struct ospf_route *or;
struct route_node *rn;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): Start");
for (rn = route_top (rt); rn; rn = route_next (rn))
{
if ((or = rn->info) == NULL)
continue;
if (!(area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id)))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): area %s no longer exists",
inet_ntoa (or->u.std.area_id));
continue;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): this is a route to %s/%d",
inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen);
if (or->path_type >= OSPF_PATH_TYPE1_EXTERNAL)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): "
"this is an External router, skipping");
continue;
}
if (or->cost >= OSPF_LS_INFINITY)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this route's cost is infinity, skipping");
continue;
}
if (or->type == OSPF_DESTINATION_DISCARD)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this is a discard entry, skipping");
continue;
}
if (or->path_type == OSPF_PATH_INTRA_AREA &&
!ospf_abr_should_announce (ospf, &rn->p, or))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): denied by export-list");
continue;
}
if (or->path_type == OSPF_PATH_INTRA_AREA &&
!ospf_abr_plist_out_check (area, or, &rn->p))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): denied by prefix-list");
continue;
}
if ((or->path_type == OSPF_PATH_INTER_AREA) &&
!OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt():"
" this is route is not backbone one, skipping");
continue;
}
if ((ospf->abr_type == OSPF_ABR_CISCO) ||
(ospf->abr_type == OSPF_ABR_IBM))
if (!ospf_act_bb_connection (ospf) &&
or->path_type != OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): ALT ABR: "
"No BB connection, skip not intra-area routes");
continue;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): announcing");
ospf_abr_announce_network (ospf, rn, or);
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_network_rt(): Stop");
}
void
ospf_abr_announce_network (struct ospf *ospf,
struct route_node *n, struct ospf_route *or)
{
struct ospf_area_range *range;
struct ospf_area *area, *or_area;
struct prefix_ipv4 *p;
listnode node;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): Start");
p = (struct prefix_ipv4 *) &n->p;
or_area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id);
assert (or_area);
for (node = listhead (ospf->areas); node; nextnode (node))
{
area = getdata (node);
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): looking at area %s",
inet_ntoa (area->area_id));
if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id))
continue;
if (ospf_abr_nexthops_belong_to_area (or, area))
continue;
if (!ospf_abr_should_accept (&n->p, area))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"prefix %s/%d was denied by import-list",
inet_ntoa (p->prefix), p->prefixlen);
continue;
}
if (!ospf_abr_plist_in_check (area, or, &n->p))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"prefix %s/%d was denied by prefix-list",
inet_ntoa (p->prefix), p->prefixlen);
continue;
}
if (area->external_routing != OSPF_AREA_DEFAULT && area->no_summary)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"area %s is stub and no_summary",
inet_ntoa (area->area_id));
continue;
}
if (or->path_type == OSPF_PATH_INTER_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): this is "
"inter-area route to %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
if (!OSPF_IS_AREA_BACKBONE (area))
ospf_abr_announce_network_to_area (p, or->cost, area);
}
if (or->path_type == OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_announce_network(): "
"this is intra-area route to %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
if ((range = ospf_area_range_match (or_area, p)) &&
!ospf_area_is_transit (area))
ospf_abr_update_aggregate (range, or);
else
ospf_abr_announce_network_to_area (p, or->cost, area);
}
}
}
void
ospf_abr_process_router_rt (struct ospf *ospf, struct route_table *rt)
{
struct ospf_route *or;
struct route_node *rn;
struct list *l;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): Start");
for (rn = route_top (rt); rn; rn = route_next (rn))
{
listnode node;
char flag = 0;
struct ospf_route *best = NULL;
if (rn->info == NULL)
continue;
l = rn->info;
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): this is a route to %s",
inet_ntoa (rn->p.u.prefix4));
for (node = listhead (l); node; nextnode (node))
{
or = getdata (node);
if (or == NULL)
continue;
if (!ospf_area_lookup_by_area_id (ospf, or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): area %s no longer exists",
inet_ntoa (or->u.std.area_id));
continue;
}
if (!CHECK_FLAG (or->u.std.flags, ROUTER_LSA_EXTERNAL))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This is not an ASBR, skipping");
continue;
}
if (!flag)
{
best = ospf_find_asbr_route (ospf, rt,
(struct prefix_ipv4 *) &rn->p);
flag = 1;
}
if (best == NULL)
continue;
if (or != best)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route is not the best among possible, skipping");
continue;
}
if (or->path_type == OSPF_PATH_INTER_AREA &&
!OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route is not a backbone one, skipping");
continue;
}
if (or->cost >= OSPF_LS_INFINITY)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): "
"This route has LS_INFINITY metric, skipping");
continue;
}
if (ospf->abr_type == OSPF_ABR_CISCO
|| ospf->abr_type == OSPF_ABR_IBM)
if (!ospf_act_bb_connection (ospf)
&& or->path_type != OSPF_PATH_INTRA_AREA)
{
if (IS_DEBUG_OSPF_EVENT)
zlog_info("ospf_abr_process_network_rt(): ALT ABR: "
"No BB connection, skip not intra-area routes");
continue;
}
ospf_abr_announce_rtr (ospf, (struct prefix_ipv4 *) &rn->p, or);
}
}
if (IS_DEBUG_OSPF_EVENT)
zlog_info ("ospf_abr_process_router_rt(): Stop");
}
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? */
}
