Decoding SAToP packet with timing

asked 2023-07-28 17:29:38 +0000

according to the display filter reference, it should be possible to decode satop packets in wireshark, however i have been unable to do so. thus far I have only been able to attempt a manual decoding of the raw packet in hex. I am hoping to show that timing has been inserted. Is there any "trick" to displaying this type of information? thanks for any insight.

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Sample capture attached to 3903: Added: CESoPSN and SAToP over IP+UDP
Are you trying to decode the payload field or just not even getting the control word decode?
Did you set port(s) for SAToP protocol preferences or via "Decode As..." ?

Chuckc gravatar imageChuckc ( 2023-07-28 17:39:56 +0000 )edit

decoding the payload field would be most advantageous as i am trying to determine if timing for adaptive clock recovery is being properly passed across a satop w/udp circuit emulation. i am using decode as... and am able to see control word information, 25% are listed as CW:Bad due to packet malformation. i am investigating that thread, but cannot determine if those packets are those with timing inserted or ortherwise. perhaps payload decoding might assist further, is that possible?

malexherr0n gravatar imagemalexherr0n ( 2023-07-28 17:55:54 +0000 )edit

Probably the question is, are you expecting a RTP header in there, because currently that's not supported.

Jaap gravatar imageJaap ( 2023-07-28 18:19:10 +0000 )edit

after digging around more thoroughly into satop and how timing works in the payload, it makes sense that i would need RTP decoding. thanks for the help in pointing me in the right direction.

malexherr0n gravatar imagemalexherr0n ( 2023-07-28 18:44:56 +0000 )edit

If you could provide a sample capture file we could build that support into Wireshark.

Jaap gravatar imageJaap ( 2023-07-28 18:59:20 +0000 )edit