Call of Duty 2 - Rcon Protocol

Yeah, I know it's a game, but please bare with me, as this is very network specific:

What I am planning on doing, is creating a secure website, running a J2EE application (my preferred language), and creating a management application that connects to a given server (with the correct credentials etc...).

So far, from digging around, I have found out that rcon on cod2 takes place over a UDP connection to the server. Whenever you make a request, you send a packet of the form:
bytes: "0xFF 0xFF 0xFF 0xFF"
characters: "rcon password command"

and the server responds back with potentially multiple packets, each packet beginning with
bytes: "0xFF 0xFF 0xFF 0xFF"
characters: "print"
bytes: "0x0A"
characters: the message that is returned, or part thereof

Reading a message that returns in one packet is not a problem currently, such as "g_gravity". What I'm getting problems with, is retrieving multiple packets back, such as the rcon command "dvarlist". Sometimes I don't receive all packets, other times, i get them out of order (which is understandable for UDP).

Is there anything in the rcon protocol, or in Java that will help me identify the order of the packets I am receiving?

Thanks Guys for any help you can offer.

David Hayes