rn_addroute
rn = rn_addroute(saddr, smask, rnh, np->netc_rnodes, 0);
rn = rn_addroute(&ke->pfrke_sa, &mask, head, ke->pfrke_node, 0);
rn = rn_addroute(&ke->pfrke_sa, NULL, head, ke->pfrke_node, 0);
(rn = rn_addroute((caddr_t)&ipo->ipo_addr,
rn = rn_addroute(&session->ip_address, &session->ip_netmask,
struct radix_node *rn_addroute(void *, void *, struct radix_node_head *,