Hello,
since this is the only contact available at bluez.com I'm sending these
questions to this list. If this is not the contact to be used please
direct me to the one which is.
I'm trying to make a sort of content server using bluetooth. As such I
coded a non blocking rfcomm server which accepts remote connections and
according to the received connections sends data back. The machine doing
this uses two bluetooth adapters and one is binded to the accepting
socket, however the same machine, in this case the same application is
supposed to scan visible remote bluetooth adapters for rssi values and so
my first question arises.
Is it possible to accept connections at the same time a inquiry is running
or is the inquiry a blocking operation at the stack level? With two
adapters my server accepts remote connections and receives and sends data
but when an inquiry is running it stops accepting connections. The inquiry
is done in a separate thread.
Another question is related to a rfcomm client getting into D state and
thus not killable. Due to my setup (two adapters in the same computer) I
can use the computer as both the server and the client. For test purposes
only I made a simple rfcomm client and I put it in a shell cycle thus
stressing the system regarding bluetooth connections. In this situation
the rfcomm client application becomes unresponsive after some time due to
a non exiting disk sleep. I then end up with multiple instances of the
same application and I can't kill them. By launching the application after
this I can see that the code blocks at a socket connection command
entering in a disk sleep state from which it doesn't exit. When this
happens I have to unplug the bluetooth adapter to get it working again
since it starts to give timeouts with hciconfig commands like "hciconfig
reset".
Any ideas about this? The problem itself is not serious since it shouldn't
arise in normal conditions but it does require a reboot because of the
state D processes and makes the adapter unusable unless it is unplugged.
Best regards,
--
Sérgio Pedro dos Santos Capela - Tziranda
Polo Tecnológico de Lisboa
Edifício Empresarial 3
1600-546 Lisboa
Telf: 21 314 09 83
Telml: 96 491 94 37
Email: ssc@xxxxxxxxxxxx
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