nd6_is_addr_neighbor
if (nd6_is_addr_neighbor(&src_sa, ifp) == 0)
!nd6_is_addr_neighbor((struct sockaddr_in6 *)rt_key(rt), ifp))) {
if (ln == NULL && nd6_is_addr_neighbor(dst, ifp)) {
int nd6_is_addr_neighbor (struct sockaddr_in6 *, struct ifnet *);
if (nd6_is_addr_neighbor(&src_sa6, ifp) == 0) {
if (nd6_is_addr_neighbor(&src_sa6, ifp) == 0) {