>>A dissector is expected to be able to handle being called with tree null or non-null at any point;

Thanks for the clarification. I guess when I started I did not understand the readme.developer note on this topic. Now I do :-/ Would this mean, that this feature is mainly for single packet protocols or would named data sources solve this problem?

If so, any direction to a reference example would be appreciated.
I've read your Sharkfest 08 presentation and it sounds promising, but I didn't master it yet.

David

Guy Harris wrote:
On Oct 20, 2009, at 11:00 AM, David Aggeler wrote:

Is a dissector supposed to be able to handle something like this, i.e.
being called with tree specified somewhere in the middle of the stream?

Yes. A dissector is expected to be able to handle being called with tree null or non-null at any point; it's up to the Wireshark/TShark/ etc. core to choose whether it needs, and hence asks for, a protocol tree or not.
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