Re: RFCOMM server multiple client connections

[Marcel Holtmann <marcel@holtmann.org>]

Hi Kasper,

> I am trying do do a simple client server setup  with bluez.
> I can manage to have a client and a server on rfcomm sockets where the 
> server listen on a socket and accept a connection from the client by 
> connect. But then if I set the server back to accepting without putting 
> down the one client connection it doesn't accept a new connection.
> When I read thought the documentation I can find on Bluez and Bluetooth 
> in general it seems like it should be possible to multiplex serveal 
> virtual rfcomm connections  on one actual connection. But however I 
> really can get it working and can't find any code where they do 
> something similar.

are the clients running on multiple adapters. If they run on the same
adapter, it won't work. RFCOMM is not a layer that assign dynamic
channels numbers to each connection (like L2CAP does) and thus once a
RFCOMM channel is in use (the pair is bdaddr:channel) then you can
connect to it twice.

Regards

Marcel