This needs to be a script.

The best way would be to sniff a request/response from a known user [or fake user], then extract the udp header + payload in hex format, then create a CSS script to send the hex formatted query and to verify that the hex formatted response matches the server response.

I believe the ap-kal-dns script uses a similar approach so you can look at it to get an idea of what you have to do.

Gilles.