GodotTicTacToe/scripts/Peer.cs

using Godot;
using System.Threading;
using Thread = System.Threading.Thread;

public abstract class Peer : Object {

    private static PacketPeerUDP PacketPeer;
    private static Peer Singleton;
    private int LastConnectionSended = -1;
    private Thread ListenerThread;

    public Peer(PacketPeerUDP packetPeer) {
        PacketPeer = packetPeer;
    }

    public abstract void Initialize(string address, int port);
    public abstract void Update(float delta);
    public abstract void ReceivePacket(byte[] buffer, string address, int port);

    public void SendBuffer(byte[] buffer, Connection to) {
        int temp1 = PacketPeer.SetDestAddress(to.Address, to.Port);
        int temp2 = PacketPeer.PutPacket(buffer);
        GD.print("Putting stuff to " + to.Address + ":" + to.Port);
    }

    public bool StartListening(int port, string address = "*") {
        if (PacketPeer.IsListening() || ListenerThread != null) {
            GD.printerr("The Peer is already listening or the thread is active!");
            return false;
        }
        Singleton = this;
        PacketPeer.Listen(port, address);
        ThreadStart ChildRef = new ThreadStart(ListenerThreadMethod);
        ListenerThread = new Thread(ChildRef);
        ListenerThread.Start();
        return true;
    }

    public static void ListenerThreadMethod() {
        GD.print("Started Listener Thread.");
        while (true) {
            PacketPeer.Wait();
            byte[] Buffer = PacketPeer.GetPacket();
            string Address = PacketPeer.GetPacketIp();
            int Port = PacketPeer.GetPacketPort();
            Singleton.ReceivePacket(Buffer, Address, Port);
        }
    }

}