How to use the existing h264 dissector as a subdissector for a custom one

Question

Hi there,

I stuck at a point where I could do with some help of the experts :-) I'm currently writing a dissector for a proprietary protocol which includes h264 data as payload. The dissector for the proprietary protocol elements is working and now I would like to pass the payload to the h264 dissector which is part of wireshark.

Could someone give me a hint on how to manage this?

Thank you!

Answer 1

Hi,

the H.264 dissector can be retrieved thanks to the "h264" string. In your proto_reg_handoff() function, add the following code:

h264_handle = find_dissector("h264");

where h264_handle is defined as:

dissector_handle_t h264_handle;

Then in your code, call the H.264 dissector like this:

call_dissector(h264_handle, h264_tvb, pinfo, tree);

where h264_tvb is a tvb containing your H.264 payload.