[Ethereal-dev] How can I get offset of some field from tcp data zone?

[scz <scz@xxxxxxxxxxx>]

In some sub dissector, for example:

TCP
    NBT
        SMB
            DCE/RPC
                stub data

I'm unmarshaling the stub data, and want to show offset to &NBT in graphic
tree. Can I get/compute the offset via pinfo->private_data or others?

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