The someones are clients, and they can use the broadcast address, and send a message on a specified port.
Your application will listen on that specified port, and when you receive the message you'll have the IP, and the message data ie might say 'Hi'
Like most things there are others ways to do the same thing.
Your application will listen on that specified port, and when you receive the message you'll have the IP, and the message data ie might say 'Hi'
Like most things there are others ways to do the same thing.