Hi Ronnie,

For my internship here at Wireless Value (Netherlands) I written a
program which I call 'hcimon'. With this program I can capture BCSP/HCI
communication externally between a BlueCore and its host.

The HCI communication (all ACL data, COMMAND/EVENT packets and LINK
ESTABLISHMENT packets, yet no SCO data) is logged in a file in a format
that can be reread by hcidump in order get a more human readable
interpretation of the captured bytes.

In order to have a captured HCI message interpreted by hcidump it needs
to be preceded with a 12 byte hciheader and a packet type byte (so a
total of 13 byte header). This is exactly what my program does.

So, to keep it short: I've logged a lot of things now so I have enough
HCI-log files in a hcidump file format. It MAY be slightly different
from an official hcidump file; for example I don't know what the PAD
byte in the hcidump-header is used for, so I fill this byte with 0x00
since I've seen a lot of official hcidump files doing that. Nevertheless
I use them for debugging without problems.

I have about 6 good hcilog files ranging in size from 30 MB to 350 MB. I
may be able to upload them to some server space if you want.

Let me know!

Ruud

On Mon, 2006-05-15 at 10:13 +0000, ronnie sahlberg wrote:

> List,
> Posting to devel since you guys are probably more interested in
> protocol dissection support in ethereal than regular users.
> 
> Im Ronnie sahlberg, one of the developers of ethereal.
> By request of some users I have found an old patch by Christoph Scholz
> to ethereal for a dissector he wrote for the bluetooth stack in 2002.
> 
> 
> Christoph's email address unfortunately does not work now after 4 years :-(
> 
> 
> Since the patch is 4 years old it does not apply to ethereal svn any
> more  since too many internal APIs have changed.
> I am however massaging and refactoring it for inclusion and have
> included some of the protocol stack into ethereal already.
> 
> Ethereal reads the files generated by some tool called 'hcidump' (i am
> not a bluetooth guy,   im a san/nas guy  so im not read up on your
> tools)
> 
> I am currently refactoring the L2CAP layer and would really benefit
> from having some more example captures to work and verify with before
> i check this layer in.
> 
> In particular I am looking for L2CAP captures containing command
> packets with InformationRequest/Response, and connectionless reception
> channel packets.
> I would also like some captures where the ACL layer contains L2CAP
> pdus   that are fragmented across several ACL packets and a
> description on how the fragmentation works for bt.
> 
> 
> This is to start with, to proceed even further I would really benefit
> from having as many and as large captures as possible to verify with.
> The more the merrier.
> 
> 
> Anyone that can provide captures with these kind of packets, and who
> want me to refactor the patch so that it can all go into mainline
> ethereal,   PLEASE send me such hcidump captures.
> 
> 
> 
> best regards
> ronnie sahlberg
> 
> (I am not subscribed to this list since i am not really that
> interested in bluetooth   but it is a shame to let this patch diverge
> more than it already has  and support for bt would benefit some users.
> 
> Please send me as many hcidump captures as possible.   please.   thanks)
> 
> 
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