> I'm trying to figure out if a given ip address is in any of the > subnets I'm connected to > I assume I need to iterate through all connected NICS, and > calculate the size and location of that specific subnet using the > ip and netmask for that connection, and then see if given ip > address falls in that subnet?
The Internet Protocol Helper Component will get you the assigned IP addresses and masks: http://www.magsys.co.uk/delphi/magiphlp.asp > Can anybody give me a pointer in the right direction please? Is > there any api (or ics tool) which can do the subnet calculation for > me? The trick with IP addresses is always to work with 32-bit unsigned double words, AND and ORs give you the subnet limits, then it's simple range comparisons. Make sure the endian order is reversed for Intel. Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
