>As a hack just use exec and radclient to generate the packets and feed them back into the server.

Interesting. That suggest there might be a way to make it work after all...(I merely need a hack, it's for the purpose of simulating behavior of an operators's GGSN towards a system that distributes IP to GSM devices, then talks to them via the IP address provided)

Some explanation / samples on how to use the exec inside the DHCP script files ?