/* 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
}
struct ospf_neighbor *
ospf_nbr_get (struct ospf_interface *oi, struct ospf_header *ospfh,
struct ip *iph, struct prefix *p)
{
struct route_node *rn;
struct prefix key;
struct ospf_neighbor *nbr;
key.family = AF_INET;
key.prefixlen = IPV4_MAX_BITLEN;
if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
{
key.u.prefix4 = ospfh->router_id; /* index vlink nbrs by router-id */
}
else
{
key.u.prefix4 = iph->ip_src;
}
rn = route_node_get (oi->nbrs, &key);
if (rn->info)
{
route_unlock_node (rn);
nbr = rn->info;
if (oi->type == OSPF_IFTYPE_NBMA && nbr->state == NSM_Attempt)
{
nbr->src = iph->ip_src;
memcpy (&nbr->address, p, sizeof (struct prefix));
}
/*add by bill 20091224. if the nbr's router id is changed, then the nbr's
state is transit to ExStart, to refresh the adjacency*/
if(IPV4_ADDR_CMP(&nbr->router_id, &ospfh->router_id))
{
nbr->router_id = ospfh->router_id;
OSPF_NSM_EVENT_EXECUTE (nbr, NSM_AdjOK);
}
}
else
{
rn->info = nbr = ospf_nbr_add (oi, ospfh, p);
nbr->router_id = ospfh->router_id;
}
return nbr;
}
/* 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);
}
