Verifying framed-ip-address using unlang

[Pshem Kowalczyk]

Hi,

Is it possible to use unlang to verify whether framed-ip-address is in
the right range or not?
We would like to use it on our wholesale proxies. Wholesale customers
of ours are allowed to allocate IPs to their customers, but only from
certain ranges. Will a normal comparison (> <) work with IP addresses?
Or do I have to use one of 'real' languages for that?

kind regards
Pshem