Ethereal-users: Re: [Ethereal-users] Why Tethereal can not print protocol tree of H245/RTP/RTCP

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Thu, 31 Jul 2003 18:52:14 -0700

On Thursday, July 31, 2003, at 6:05 PM, Deng, Luke Hao (Luke) wrote:
I tried without "-R h245" flag and with "-V" flag. It can print the protocol tree of other packets, including H.225RAS and H225Q931. But for H245, it shows Data(XX bytes) like below.
That means that, for some reason, it's not recognizing the packet as H.245 when "tethereal -V" is run - but it *is* recognizing it as such when Tethereal is run without "-V".
If that's because, for some reason, it fails to recognize it as H.245 when building a protocol tree, that would explain why "-R h245" isn't working - read filters work on the protocol tree, and that read filter matches packets where the protocol tree includes a protocol tree item for H.245, and if it's not recognizing packets as H.245 when building the protocol tree, there won't be an item for H.245 in the protocol tree. 

Does Ethereal show the protocol tree of H.245 for packet 22?