How to obtain a new wireless host's IP address?

Hi All,

I have a question regarding NoCatSplash. For a service that I am
developing for wireless clients, I need to obtain a new wireless
host's IP address or MAC address immediately after he/she is
authenticated.

My question is: Is there a way to obtain address information from
NoCatSplash without having to modify the source code? E.g. does
NoCatSplash update a text file with this information? If not, can I
somehow get NoCatSplash to run my own script to obtain the address
info., as soon as the user is authenticated? Please help.

Thanks,
Pankaj.