Ethereal-dev: RE: [Ethereal-dev] RTP and RTCP automaticaly decode, for a range of ports

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From: "Visser, Martin (Sydney)" <Martin.Visser@xxxxxx>
Date: Thu, 25 Jul 2002 10:59:03 +1000
I imagine what Cirstea is asking for might be implemented easily if "Decode As" could be used to specify a range of UDP ports (say 500-599) as a certain protocol?

Martin Visser
Network Consultant - Global Services
COMPAQ, part of the new HP

3 Richardson Place
North Ryde, Sydney NSW 2113, Australia
Phone *: +61-2-9022-1670    Mobile *: +61-411-254-513
   Fax 7: +61-2-9022-1800     E-mail * : martin.visserAThp.com




-----Original Message-----
From: Guy Harris [mailto:guy@xxxxxxxxxx]
Sent: Thursday, 25 July 2002 3:56 AM
To: cpetrut
Cc: ethereal-dev@xxxxxxxxxxxx
Subject: Re: [Ethereal-dev] RTP and RTCP automaticaly decode, for a
range of ports


On Wed, Jul 24, 2002 at 12:03:55PM +0300, cpetrut wrote:
> A few weeks ago I starting to develop plugins for Ethereal, and now I
> have problems with protocols implementation. 
> 
> I want to automaticaly decode RTP and RTCP, for a range of ports. 
> (not using "Decode as..." option)

"Automatically" in what sense?

I.e., where do you find out the range of ports?

If there's some other protocol that has messages indicating that certain
ports are used for RTP and RTCP - RTSP, for example - and RTP and RTCP
will be running over UDP, for example, then you'd do it the same way the
RTSP dissector does it, i.e.  you'd construct a "conversation", given
the IP addresses of the hosts that will be exchanging RTP and RTCP
messages, and the port numbers being used, and specify that the RTP and
RTCP dissectors should be used for that conversation.
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