Re: [Bluez-devel] About concurrency sdp_connect

[Marcel Holtmann <marcel@holtmann.org>]

Hi Peter,

> > I'm not expert in bluez kernel driver programming but I've developed an 
> > application using socket abstraction
> > on Windows (microsoft stack) and I can connect simultaneously to many 
> > devices (7 max) with the same usb dongled
> > tested with bluez on linux. So I think it can't be a hardware problem, 
> > or better may be the hardware limitation but I think it's bypassable
> > in software layers.
> > bye
> > Fabrizio
> 
> The problem is not to connect to 7 devices simultaniuous. The problem is 
> that (on the HCI level) most (or all??) devices gives you an error 
> response when you start a new connection while there is an outstanding 
> connection request. Of cause you can come arround this by software on the 
> upper level. E.g. you can make sure not to send a new connect request to 
> the device while it has not responeded to the previous one. 

my last attempt to make this work actually failed, but I didn't put much
energy into it. Feel free to come up with a working version. The path
how to handle this is clear.

> Don't know what microsoft is doing here (don't have their source ;-). 

They will do something similar. If you get a HCI trace, then you can see
for yourself what they are doing.

Regards

Marcel



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