Message-ID: <404EFA72.4090205@csr.com>
From: Steven Singer <steven.singer@csr.com>
MIME-Version: 1.0
To: Michael Schmidt <schmidt@nue.et-inf.uni-siegen.de>
CC: jessieh@MIT.EDU, bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] bd_addr question
References: <404EC780.4070609@nue.et-inf.uni-siegen.de>
In-Reply-To: <404EC780.4070609@nue.et-inf.uni-siegen.de>
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Sender: bluez-devel-admin@lists.sourceforge.net
Errors-To: bluez-devel-admin@lists.sourceforge.net
Date: Wed, 10 Mar 2004 11:22:26 +0000

Michael Schmidt wrote:
> Keep in mind that you break some of the BT functionality when you use 
> variable BD_ADDRs: The pairing-based security mechanisms (authentication 
> and encryption) rely on a constant BD_ADDR. I guess there is more 
> functionality that is affected by the change.

Don't forget that Bluetooth addresses must be unique otherwise unpleasant
things happen.

Bluetooth addresses come out of the same address space as MAC addresses,
if you want to use your own then you need to get an OUI or IAB allocation
from the IEEE.

The BD ADDR <-> MAC point is important. If you start running BNEP
(Bluetooth Network Encapsulation Protocol = Ethernet over Bluetooth)
then the Bluetooth device will use its Bluetooth address as its Ethernet
MAC address. This means that you can't simply take the MAC address from
another device on your system (say an Ethernet card) and use it as your
Bluetooth address.

	- Steven
-- 


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