Subject: Re: [Bluez-devel] SDP queries when authentication/encryption are
	turned on
From: Marcel Holtmann <marcel@holtmann.org>
To: BlueZ Mailing List <bluez-devel@lists.sourceforge.net>
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Date: Wed, 23 Feb 2005 05:28:59 +0100

Hi Shawn,

> If in hcid.conf I use these lines:
> 
>         auth enable;
>         encrypt enable;
> 
> then when I do sdptool browse or sdptool search, it keeps prompting me
> to bond with every Bluetooth device that it discovers.  This does not
> make sense, because the whole point of service discovery is to decide
> what device you want to connect to, before having to bond with it.  If
> the device was requiring a bond before answering an SDP query, fine,
> but the devices I have tested with do not - they will answer SDP
> queries just fine without a bond, as long as I have commented out those
> two lines in hcid.conf.  Maybe this is a bug - IMO bluez should
> probably ignore those settings for SDP, and always do SDP insecurely. 
> Otherwise "sdp search" becomes very impractical.  At my office often 20
> or more devices will be involved in such a search, belonging to various
> coworkers, some of whom I have not met, and I certainly do not want to
> bond with all those devices; but I also do not want to turn off
> authorization completely just so that I can do sdp queries.

if you set your device into security mode 3, then this is what you get.
As I have often said, do this only when you know what you are doing and
what does this imply.

Regards

Marcel


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