1#value_indexed 2BTPROTO_L2CAP 0 3BTPROTO_HCI 1 4BTPROTO_SCO 2 5BTPROTO_RFCOMM 3 6BTPROTO_BNEP 4 7BTPROTO_CMTP 5 8BTPROTO_HIDP 6 9BTPROTO_AVDTP 7 10