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));
}
} else {
rn->info = nbr = ospf_nbr_add(oi, ospfh, p);
}
nbr->router_id = ospfh->router_id;
return nbr;
}
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;
}
