C# UDP Broadcast and receive example

Question

Problem: I am trying to bind a udp socket on a specific address. I will broadcast out a message. That same socket will need to be able to receive messages.

Current code:

static void Main()
{
    UdpClient Configuration = new UdpClient(new IPEndPoint(IPAddress.Parse(data.IPAddress), configuration.Port));  //set up the bind to the local IP address of my choosing
    ConfigurationServer.EnableBroadcast = true;
    Configuration.Connect(new IPEndpoint(IPAddress.Parse(data.BroadcastIP), configuration.Port);
    Listen();

 }

private void Listen()
{
    Task.Run(async () =>
            {
                while (true)
                {
                    var remoteIp = new IPEndPoint(IPAddress.Any, configuration.Port);
                    var data = await ConfigurationServer.ReceiveAsync();

                    // i would send based on what data i received here
                    int j = 32;
                }
            }
});
}   

I am not receiving data on listen thread. I know that the code on the other side is functional, and sending a directed UDP message to the IP/Port combo.

Answer 1

It can simply be done as

int PORT = 9876;
UdpClient udpClient = new UdpClient();
udpClient.Client.Bind(new IPEndPoint(IPAddress.Any, PORT));

var from = new IPEndPoint(0, 0);
var task = Task.Run(() =>
{
    while (true)
    {
        var recvBuffer = udpClient.Receive(ref from);
        Console.WriteLine(Encoding.UTF8.GetString(recvBuffer));
    }
});

var data = Encoding.UTF8.GetBytes("ABCD");
udpClient.Send(data, data.Length, "255.255.255.255", PORT);

task.Wait();