HCI_CONN_SSP_ENABLED
test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);