rn_addroute
rnh->rnh_addaddr = rn_addroute;
*rn_addroute(void *, void *, struct radix_node_head *,
rn = rn_addroute(&ke->pfrke_sa, &mask, head, ke->pfrke_node);
rn = rn_addroute(&ke->pfrke_sa, NULL, head, ke->pfrke_node);
rnh->rnh_addaddr = rn_addroute;
*rn_addroute(const void *, const void *, struct radix_node_head *,
rn = rn_addroute(v_arg, n_arg, head, treenodes);