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Bluetooth is not really a protocol but the name of a stack of protocols that are popular for building very small wireless networks. A common use for Bluetooth is for connecting mobile phone accessories but other applications also exists such as wireless mice and keyboards for computers etc.


XXX - add a brief description of Bluetooth history

Protocol dependencies

At the lowest layer implemented in Wireshark, Bluetooth consists of 4 different types of frames:

Example traffic

No.     Time        Source                Destination           Protocol Info
     11 5.731294                                                L2CAP    Sent Echo Request

Frame 11 (57 bytes on wire, 57 bytes captured)
Bluetooth HCI H4 Sent ACL Data
    Direction: Sent (0x00)
    HCI Packet Type: ACL Data (0x02)
Bluetooth HCI ACL Packet
    .... 0000 0010 1001 = Connection Handle: 0x0029
    ..10 .... .... .... = PB Flag: Start Fragment (2)
    00.. .... .... .... = BC Flag: Point-To-Point (0)
    Data Total Length: 52
Bluetooth L2CAP Packet
    Length: 48
    CID: 0x0001
    Command: Echo Request
        Command Code: Echo Request (0x08)
        Command Identifier: 0xc8
        Command Length: 44


The Bluetooth stack is partially implemented and Wireshark can dissect several of the layers and protocols of the stack.

There is a libpcap format defined for Bluetooth frames, and support in libpcap 1.0.0 and later for capturing on Bluetooth devices in Linux; Wireshark, if linked with that version of libpcap, is able to capture on Bluetooth devices. (In Linux distributions that come with pre-1.0.0 versions of libpcap, libpcap doesn't support capturing on Bluetooth devices, so you would have to get libpcap 1.0.0 or later from, install it, and build Wireshark with that version of libpcap in order to capture on Bluetooth devices. As of 2009-01-27, Gentoo Linux has libpcap with Bluetooth support in its mainline repository (portage).) Wireshark can also read captures in that format.

In addition, Wireshark can read capture files created by the HCIDUMP utility that is available with the Linux and (I think) the BSD Bluetooth stack.

Example capture file