Wireshark · Wireshark-users: Re: [Wireshark-users] Why does wireshark not recognize my RTP packets in the correct way?

["George Peaslee" <gpeaslee@xxxxxxxxxxx>]

If you right click on one of the packets and select decode as, then select RTP, does it fix the problem? If so, go to edit preferences - protocols - RTP and check all three boxes.

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From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of André Loddenkemper
Sent: Thursday, September 10, 2009 6:08 AM
To: wireshark-users@xxxxxxxxxxxxx
Subject: [Wireshark-users] Why does wireshark not recognize my RTP packets in the correct way?

Hello,

at work I have programmed my own RTP stack to send data 
(wrapped in RTP packets) through the network to another pc, where it can be 
recieved by a voip application.

For testing purposes I am sending the RTP 
data to my own computer and watching the traffic with wireshark, where I can see 
all the RTP packets I sent. The problem is: Wireshark just recognizes those 
packets as "UDP" and not as "RTP" as it should be. My first guess was, I did 
something wrong in the RTP header. I checked it and everything there is OK, I 
think.
And on top of that: If I select such and UDP packet, right-click and 
decode it manually as a RTP packet, everything is fine. Now, with "decode as 
RTP", Wireshark does recognize all my packets in the correct way. Every field of 
the RTP header is correct. I compared it bit by bit with RTP packets from Ekiga, 
it is exactly the same.

I now have spent several days, re-coding and 
testing.
So my question is: How is that possible? Any Ideas? Why does 
wireshark not recognize my RTP packets in the correct 
way?

Greetings,
andre.