Re: Bluetooth and 6310

[Marcel Holtmann]

Hi again,

> I discovered some secrets of the Nokia Bluetooth support in the 6310
> generation. They use a special SDP entry, which is not in the public
> browse group of their SDP database. And here it is:
> 
>       Attribute Identifier : 0x0 - ServiceRecordHandle
>         Integer : 0x10006
>       Attribute Identifier : 0x1 - ServiceClassIDList
>         Data Sequence
>           UUID128 : 0x00005002-0000-1000-8000-0002ee00-0001
>       Attribute Identifier : 0x4 - ProtocolDescriptorList
>         Data Sequence
>           Data Sequence
>             UUID16 : 0x0100 - L2CAP
>           Data Sequence
>             UUID16 : 0x0003 - RFCOMM
>             Channel/Port (Integer) : 0xe
> 
> The main secret of this is that they use RFCOMM channel 14 for their
> communication protocol. At the moment I am not sure which kind of FBUS
> version did they use, but it makes sense that they use a variant of the
> phonet one, because the RFCOMM channel provides a reliable link.

I was right with my assumption that Nokia uses a phonet like protocol on
the Bluetooth link. This is the initial exchange of the connection
manager:

        Suite: 19 00 10 d0 00 01 04
        Phone: 19 10 00 d0 00 01 05
        Suite: 19 00 10 1b 00 06 00 01 00 07 00 01
        Phone: 19 10 00 1b 00 2e 01 2d 00 08 00 01 48 28 00 20
               56 20 30 34 2e 31 30 0a 30 34 2d 30 31 2d 30 32
               0a 4e 50 45 2d 34 0a 28 63 29 20 4e 4d 50 2e 00
               00 00 00 00

So the phonet protocol for Bluetooth would look like this:

        { FrameID, DestDEV, SrcDEV, MsgType, FrameLengthLo, FrameLengthHi, 
{block} }

                where FrameID:          0x19
                DestDev, SrcDev:        0x00: mobile phone
                                        0x10: TE [eg. PC]
                MsgType:                see List
                FrameLength:            {block}

Regards

Marcel