NG_HCI_ROLE_MASTER
req->cp.acc.role = NG_HCI_ROLE_MASTER;
cp.role = n0? NG_HCI_ROLE_SLAVE : NG_HCI_ROLE_MASTER;
(ep->role == NG_HCI_ROLE_MASTER)? "Master" : "Slave",
(rp.role == NG_HCI_ROLE_MASTER)? "Master" : "Slave", rp.role);
(r.connections[n].role == NG_HCI_ROLE_MASTER)?