Linux CNC for a mobile machine?

Hello, i am developing an autonomous guided vehicle system for transporting material from point a to point b.

On the AGV will be a computer running some motion control application, (linuxcnc or something else).
And connected over a network will be the server telling the AGV what to do, (grab x from location y and take it to location z).
The AGV will be in constant communication with the server.
Wondering if:
1). anyone knows how to receive text over an ethernet connection and change the g-code program executing on linux cnc?
2). send information back over a network.
3). and what the major issues would be in the proposed communication?

~Ben

So suppose i white my own interpreter. there are a few pieces to this program.
1). a steering algorithm that runs indefinitely to follow the travel path.
2). a wifi receiver for taking instructions and forwarding them on to a logic engine.
3). a wifi transmitter to send status updates back to a server.

i can and have done part 1.
does anyone have any ideas for sending/receiving wifi signals and changing operation based on them?

~Ben

No, the wifi has up to about a 1/16 second latency. So that part is not real time.