determine if 2 IP's are on the same subnet?

[JamesB]

I'm looking for a function to return true/false depending on if two supplied
IP's (as strings) are in the same subnet (also supplied).
Im getting nowhere fast unfortunately - I know the theory behind it, but I
have no idea on how to actually implement it!
I have split my supplied 3 IP's into 4 numbers each, but past that I'm
stuck - on paper I would convert them to binary and write down all the 1's
and 0's then figure it out, but in code...?
Thanks
James

 

[Simon Verona]

You need to use the "and" function between each of the 4 octects in the ip
and the equilavalent octect in the net mask to get the "network" address.
If the network address is the same for the two ip's then they are the same
network.

Hope this helps..

Regards
Simon