Reading remote IP from UDP packets received by another application

Question

I'm writing an app to deploy on our machines to force the user to enter statistics about h323 video use.

I want to get a maximum of information without asking the user, I'm having some trouble getting the remote IP address for point-to-point connection using a gatekeeper (no TCP connection to the remote IP).

I thought multiple apps could read the same UDP, but I get a socketException when I try to read the proper port. I'm using a UDPClient and get the error when I try to create the client on an active port.

Any suggestion on how to do this without having to install WinPcap and use pcap.net ?

Thanks

Answer 1

You are probably getting the address already in use exception? To allow multiple UDPClients to use the same port set the ExclusiveAddressUse property to false:

myUdpClient.ExclusiveAddressUse = false;