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Subject: Re: [Bluez-devel] Master, Slave and Maximal Peers Questions
From: Marcel Holtmann <marcel@holtmann.org>
To: ag@new-media-artists.de
Cc: Bluez Devel <bluez-devel@lists.sourceforge.net>
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Date: Thu, 15 Jan 2004 13:22:43 +0100

Hi Andreas,

> Hm, so i got this wrong. But if i connect two different devices with rfcomm,
> "hcitool con" gives me two lines that look like
> "< ACL 00:0A:D9:37:11:29 handle 41 state 1 lm MASTER". Thats what i meant
> talking about "master connections". If i start another rfcomm connect (the
> third one)i get "Device or resource busy" and i assumed thats because the
> chip i use (CSR, hci rev 16.4) can only handle two master connections. I
> found this info, that a 16.x CSR can make 7 Connections, while 2 of them can
> be Master on some web page that i remember to be on your server,
> unfortunatelly i cant find it anymore.
> 
> Im just wondering what a line ending with MASTER from hcitool con actualy
> means. IMHO it should mean that this is a peer is a slave in a piconet with
> me as the master. But why does rfcomm than say that "Device or resource
> busy" when i try to connect a third slave witch should be possible?

if you got something like this

	# hcitool con
	Connections:
	        < ACL 00:04:61:xx:xx:xx handle 45 state 1 lm MASTER 
	        < ACL 00:0A:D9:xx:xx:xx handle 42 state 1 lm MASTER 

it means that you have a piconet with two slave devices and you as
master.

I don't see any reason why you can't connect a third device into this
piconet. Run "hcidump -w <file>" for the third connection, so we can see
what happens on the HCI layer.

Regards

Marcel




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