ANNOUNCEMENT: Live Wireshark University & Allegro Packets online APAC Wireshark Training Session
July 17th, 2024 | 10:00am-11:55am SGT (UTC+8) | Online

Ethereal-dev: [Ethereal-dev] Decode As problem

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

From: PC Drew <drewpc@xxxxxxxxxxxx>
Date: Thu, 31 May 2001 11:16:56 -0600
I wrote a heuristic packet dissector and it doesn't show up under the list of "Decode As..." options. I searched through the code and found that the Decode As function loads the following dissector tables:

dissector_table_foreach("tcp.port", decode_add_to_clist, &info);
dissector_table_foreach("udp.port", decode_add_to_clist, &info);
dissector_conv_foreach("udp", decode_add_to_clist, &info);

It never adds any of the heuristic dissectors to the list...this is a huge problem because right I can't change how my packet is being decoded!

I've got a TCP conversation between ports 6668 and 7000 and it seems that Gryphon listens on port 7000. But, this isn't a Gryphon packet...it's an IPDC packet. But IPDC needs to be dissected heuristically...and even if I turn off processing of Gryphon packets, it doesn't seem to dissect as IPDC. The heuristic dissection works fine when the port isn't taken by another dissector. Any ideas?

--
PC Drew

  Be nice, or I'll replace you with a very
  small shell script