Anyone had a chance to look at this patch?

On Sun, Jan 4, 2009 at 12:29 AM, Kaul <[email protected]> wrote:

> Attached please find a patch that enables to heuristically find VNC traffic
> on non-standard ports.
>
> (it also adds some if(tree) ... around some proto_tree_add_item()
> functions)
>
> Y.
>
>
> On Sun, Dec 28, 2008 at 11:50 PM, Stephen Fisher <[email protected]
> > wrote:
>
>> On Sun, Dec 28, 2008 at 11:34:55PM +0200, Kaul wrote:
>>
>> > BTW, there's no minimum length verification for messages. I'd assume
>> > that if we try to dissect traffic as VNC we should probably verify
>> > minimal lengths - both SERVER_VERSION and CLIENT_VERSION packets
>> > should be EXACTLY 12 bytes long and start with ASCII chars 'RFB '(3
>> > letters and space - hex 52 46 42 20). Moreover, this could also be
>> > used to heuristically find VNC traffic on non-standard ports.
>>
>> That's a good idea.  I've thought for a while about adding length
>> verficiation to all of the fixed length packets in fact to help the
>> dissector pick up close to the right place in the VNC session if it's
>> already going on when the dissection starts.
>>
>> > If agreed, I'll try to follow this with a patch, at least for some of
>> > the comments above.
>>
>> Go ahead and whip up a patch and we'll try it out :).  Thanks for your
>> interest in improving the VNC dissector!
>>
>>
>> Steve
>>
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