l2flood

Flood a given bluetooth device with ping requests in order to force it to disconnect.

INSTALL

Satisfy the dependencies first, and then:

git clone https://git.sr.ht/~kovmir/l2flood
cd l2flood
make
sudo make install

USAGE

Suppose there is a loud bluetooth speaker in public, and suppose 94:3a:2c:e1:2b:07 is its address. You can shut it off like that:

l2flood 94:3a:2c:e1:2b:07 # Flood with up to 4 threads, depending on how many CPU cores are available.
l2flood -t 5 94:3a:2c:e1:2b:07 # Flood with 5 threads.

A weak speaker CPU or Bluetooth interface will not be able to process that many ping requests, and receive/decode music simultaneously, so it will disconnect.

Your bluetooth card is your bottleneck: Even if you have a multi-core multi-gigahertz CPU, it makes little to no sense to spawn as much as 100 threads, because your bluetooth card is unlikely to be fast enough to process all the requests as quick as you submit them.

DEPENDENCIES

• Bluez
  • On Debian/Ubuntu/Kali sudo apt install -y libbluetooth-dev.

SUPPORTED OPERATING SYSTEMS

• Linux

CREDITS

@Ymsniper refactored the entire flood algorithm.

FAQ

Q: Does it work in termux?

A: No, Bluez libraries are not available in termux.

Q: Does it work on Steam Deck?

A: Yes.

Q: How to increase flood efficiency?

A: Get a second bluetooth card, and flood using both of them.

BT_ADDR='00:00:00:00:00:00' # Set the target address.
l2flood -i hci0 $BT_ADDR &
l2flood -i hci1 $BT_ADDR

Q: How to fix Can't create socket: Operation not permitted?

A: Re-run as root user.