> Does anyone here know how to implement a "Reverse ARP" request? > > I have a piece of hardware that has a network port for remote > control (RJ45, 10/100 UTP etc) but next to no physical user > interface, but it does support IP address assignment by DHCP.
If the hardware sets it's IP address using DHCP, then the DHCP server should be announce the address, but whether this is accessible programmatically is another issue. You can ping the local subnet to find which IP addresses are in use, and try to connect to find your device. Using a threaded ping, you can send off 253 pings at the same time to avoid all the timeouts waiting for responses. The Microsoft IP Helper APIs do offer some ARP functions, but they appear to relate only to ARP on the local PC. There is a SendARP function, but it just returns the MAC address for a remote PC by IP address, whereas you want the reverse. Google brings up a lot of hits on Reverse APR and RAPR, but the first page does not show any tools or implementations, just background. 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
