Re: Sub_dissectors assertion failed

[Guy Harris <guy () alum mit edu>]

On May 21, 2010, at 6:42 PM, Scott wrote:

> On Fri, May 21, 2010 at 3:18 PM, Guy Harris <guy () alum mit edu> wrote:
> > So what protocols does your custom protocol run on top of?
>
> For now the custom protocol is a dummy protocol that only contains a 32-bit int and rides on top of the IP protocol 
> rider (*it*).

So presumably the IP protocol rider protocol has fields of its own.

Does the IP protocol rider have an IP protocol number assigned to it, so that you have:

        link-layer protocol

        IP, with the IP protocol number having the value for the IP protocol rider protocol

        IP protocol rider protocol

        custom protocol

        some protocol that normally runs directly atop IP

or is this a non-standard encapsulation where you have:

        link-layer protocol

        IP, with the IP protocol number having the value for the protocol that's above the custom protocol

        IP protocol rider protocol

        custom protocol

        some protocol that normally runs directly atop IP

The former can be done without modifying Wireshark, but not the way you're doing it.

The latter *CANNOT* be done without Wireshark's IP dissector to directly call the dissector for the IP protocol rider 
protocol.
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