NG_HCI_UNIT_CONNECTED
unit->state |= NG_HCI_UNIT_CONNECTED;
unit->state &= ~(NG_HCI_UNIT_CONNECTED|NG_HCI_UNIT_INITED);
#define NG_HCI_UNIT_READY (NG_HCI_UNIT_CONNECTED|NG_HCI_UNIT_INITED)