Subject: Re: [Bluez-devel] Interwork of RFCOMM and L2CAP layers
From: Marcel Holtmann <marcel@holtmann.org>
To: bluez-devel@lists.sourceforge.net
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Date: Thu, 16 Dec 2004 21:00:35 +0100

Hi Filipa,

> I am not a kernel developer but I would like to do
> profiling in BlueZ code as part of my PhD research,
> specifically on RFCOMM/L2CAP layers. I took the source
> code from my 2.4.22 kernel. 
> 
> I was expecting to see some functions on the RFCOMM
> files calling functions on the L2CAP files, as RFCOMM
> is a layer on top of the L2CAP layer. However I could
> not find any (actually there is one: rfcomm_init calls
> l2cap_load; but this last function is a dummy
> function). 
> 
> Could you please tell me where I could find
> information on how the RFCOMM and L2CAP layers
> interwork in the BlueZ implementation (I, of course,
> tryed Google and BlueZ web sites but I could not find
> information)?

the RFCOMM uses in-kernel socket programming to send or retrieve data
from the L2CAP layer.

> I would be particularly grateful if someone could give
> directions on how to use the BlueZ stack in a simple
> user space mode.

Check out l2test or rctest. This is all about socket programming.

Regards

Marcel


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