> What you should do is have a *heuristic* dissector, which you would
> register with
>
> heur_dissector_add("udp", dissect_red, proto_red);
>
> dissect_red() would return a gboolean - FALSE if the packet isn't a
> packet for your protocol, TRUE if it is. It would probably look like
>
> static gboolean
> dissect_red(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
> {
> if (tvb_reported_length(tvb) != CORRECT_DATA_LENGTH)
> return FALSE;
>
> dissect the packet;
>
> return TRUE;
> }
Thank you for your answer. The heuristic dissector is exactly what I needed.
But there is another question: How can I check whether it is a UDP-package or a TCP-package? Is there something like ip.proto==0x06 ?
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