I wouldn't be surprised if JaneStreet open sources an internal tool soon-ish. They've actually been writing a number of custom plugins and modules for WireShar

I wouldn't be surprised if JaneStreet open sources an internal tool soon-ish. They've actually been writing a number of custom plugins and modules for WireShark to support internal custom protocols and seem to have a lot of features they'd like that aren't currently present in WireShark.