// using the L2CAP protocol.
type SockaddrL2 struct {
	PSM      uint16
	CID      uint16
	Addr     [6]uint8
	AddrType uint8
	raw      RawSockaddrL2
}

func (sa *SockaddrL2) sockaddr() (unsafe.Pointer, _Socklen, error) {
	sa.raw.Family = AF_BLUETOOTH
	psm := (*[2]byte)(unsafe.Pointer(&sa.raw.Psm))
	psm[0] = byte(sa.PSM)
	psm[1] = byte(sa.PSM >> 8)
	for i := 0; i < len(sa.Addr); i++ {

	Pad    uint16
	Pid    uint32
	Groups uint32
}

type RawSockaddrHCI struct {
	Family  uint16
	Dev     uint16
	Channel uint16
}

type RawSockaddrL2 struct {
	Family      uint16
	Psm         uint16
	Bdaddr      [6]uint8
	Cid         uint16
	Bdaddr_type uint8
	_           [1]byte
}

type RawSockaddrRFCOMM struct {
	Family  uint16
	Bdaddr  [6]uint8
	Channel uint8