But you're right, maybe we want two moustique_listen_tcp moustique_listen_udp helpers. I put this in my todolist.
Great project by the way - I've put it on my workbench-TODO for a little hacking some time in the next few days. I've got a standard 'command processing server' project that I've been hacking on over the years, I might try to hack up a moustique_ integration, just for grins.