Udp socket tool for windows. Include server and client.
Create a udp server to receive messages
udp receive port [/c|/ca cmd]
receivenecessaryportthe port to be bond for udp communication[/c|/ca cmd]regard received message as a command (/c), command argument (/ca) forcmd, or plain text if not specified.
udp client to send message
udp send ipaddr:port msg
sendnecessaryipaddrserver ip addressportserver opened udp portmsgthe text message to send
When udp receive all the server ip addresses are prompted, which should contain the correct ip address (except localhost sometimes) for the udp send.
You can compile your own executable through the source code, or directly use my compiled version from below link.
Download from here ~ around 17.0k
Note it was compiled under .net framework 3.5 x86 , therefore should be compatible with Win7 and above for both x86/x64.

