Make networking work

Assets/Scripts/Net/CanvasInput.cs

@@ -5,24 +5,35 @@ using UnityEngine.UI;
 using NeonTea.Quakeball.Net.Peers;
 
 namespace NeonTea.Quakeball.Net {
-    public class CanvasInput : MonoBehaviour {
+    public class CanvasInput : MonoBehaviour, PeerMessageListener {
-
         public Button Host;
         public Button Join;
+        public Button Stop;
         public InputField HostAddr;
         public InputField Port;
+        public Text TextField;
+
+        private static List<string> Stuff = new List<string>();
 
         void Start() {
             Host.onClick.AddListener(() => {
-                //Destroy(Join.gameObject);
+                Net.Singleton.StartServer("0.0.0.0", 8080, this);
-                //Host.interactable = false;
-                Net.Singleton.Start(new Server(), "0.0.0.0", 8080);
             });
             Join.onClick.AddListener(() => {
-                //Destroy(Host.gameObject);
+                Net.Singleton.StartClient("127.0.0.1", 8080, this);
-                //Join.interactable = false;
-                Net.Singleton.Start(new Client(), "127.0.0.1", 8080);
             });
+            Stop.onClick.AddListener(() => {
+                Net.Singleton.Stop();
+            });
+        }
+
+        void Update() {
+            TextField.text = string.Join("\n", Stuff.ToArray());
+        }
+
+        public void Message(string text) {
+            Stuff.Add(text);
+            Debug.Log(string.Join(", ", Stuff.ToArray()));
         }
 
 

Assets/Scripts/Net/Connection.cs

@@ -1,21 +1,37 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Net;
+using System;
+
+using NeonTea.Quakeball.Net.Packets;
 
 namespace NeonTea.Quakeball.Net {
     public class Connection {
 
         public IPEndPoint Endpoint;
-        public ConnectionStatus Status = ConnectionStatus.Establishing;
+        public ConnectionStatus Status;
+        public byte AssignedProtocol;
+        public ClosingReason ClosingReason;
 
-        public Connection(IPEndPoint endpoint) {
+        public long LastMessage;
-            this.Endpoint = endpoint;
+        public int LatestPacketSent; // Last Packet ID the connection has told us they have
+        public int LatestPacketReceived; // Last Packet ID we've received from the connection
+        public int PacketIDCounter; // Packet ID counter for packets we're sending them
+
+        public Connection(IPEndPoint endpoint, ConnectionStatus status = ConnectionStatus.Establishing) {
+            Endpoint = endpoint;
+            Status = status;
+            LastMessage = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
         }
     }
 
     public enum ConnectionStatus {
-        Establishing,
+        Awaiting,       // Awaiting an establishing
-        Ready,
+        Establishing,   // Attempting to establish
-        Closed,
+        Ready,          // Ready for packet sending
+        Rejected,       // Rejected connection at endpoint, sending Rejected
+        Closed,         // Closed connection at endpoint, sending Closed
+        Stopped,        // Not sending packages
+        Lost,           // Connection Lost
     }
 }

Assets/Scripts/Net/Net.cs

@@ -1,4 +1,6 @@
-using UnityEngine;
+using System.Collections.Generic;
+using System;
+using UnityEngine;
 using NeonTea.Quakeball.Net.Peers;
 using System.Threading;
 
@@ -6,23 +8,49 @@ namespace NeonTea.Quakeball.Net {
 
     public class Net {
         public static Net Singleton = new Net();
+        private static byte[] FP = new byte[] { 0xFF, 0xF7 };
 
-        private Peer Endpoint;
+        public Peer Peer;
 
-        public void Start(Peer endpoint, string host, int port) {
+        public void StartClient(string address, int port, PeerMessageListener listener) {
-            if (Endpoint != null) {
+            if (Peer != null) {
                 Debug.Log("Can not start multiple endpoints at once! Use Server if multiple connections are required.");
                 return;
             }
-            Endpoint = endpoint;
+            Peer = new Peer(FP);
-            Endpoint.Start(host, port);
+            Peer.MessageListener = listener;
+            Peer.Start(0);
+            byte ident = Peer.RegisterProtocol(new TestProtocol());
+            Peer.Connect(address, port, ident);
         }
 
-        public void Stop(DisconnectReason reason) {
+        public void StartServer(string address, int port, PeerMessageListener listener) {
-            if (Endpoint != null) {
+            if (Peer != null) {
-                Endpoint.Stop(reason);
+                Debug.Log("Can not start multiple endpoints at once! Use Server if multiple connections are required.");
-                Endpoint = null;
+                return;
             }
+            Peer = new Peer(FP);
+            Peer.MessageListener = listener;
+            Peer.Start(port);
+            Peer.RegisterProtocol(new TestProtocol());
+            Peer.StartListen(address, port);
+        }
+
+        public void Stop() {
+            if (Peer != null) {
+                Peer.Stop();
+                Peer.MessageListener.Message("Stopping");
+                Peer = null;
+            }
+        }
+
+        static void Quit() {
+            Singleton.Stop();
+        }
+
+        [RuntimeInitializeOnLoadMethod]
+        static void RunOnStart() {
+            Application.quitting += Quit;
         }
     }
 }

Assets/Scripts/Net/Packets.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 9d5b2ed44f40cc940bae2d8e4c868bf4
+guid: 195df611d888d7248a7d4d22f10dfd71
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}

Assets/Scripts/Net/Packets/Packet.cs

@@ -0,0 +1,118 @@
+using System.Collections.Generic;
+using System;
+using System.Text;
+
+namespace NeonTea.Quakeball.Net.Packets {
+    public abstract class Packet {
+        public int id;
+
+        public abstract void Write(ByteBuffer buffer);
+        public abstract void Read(ByteBuffer buffer);
+    }
+
+    public enum PacketStage {
+        Establishing = 0,
+        Rejected = 1,
+        Closed = 2,
+        Ready = 3,
+    }
+
+    public enum ClosingReason {
+        Unknown = 0,
+    }
+
+
+    public class ByteBuffer {
+        private List<byte> Bytes;
+        private int pos = 0;
+
+        public ByteBuffer() {
+            Bytes = new List<byte>();
+        }
+
+        public ByteBuffer(byte[] bytes) {
+            Bytes = new List<byte>(bytes);
+        }
+
+        public byte[] Pack() {
+            return Bytes.ToArray();
+        }
+
+        public bool CanRead() {
+            return pos < Bytes.Count;
+        }
+
+        public int ReadInt() {
+            return BitConverter.ToInt32(Read(4), 0);
+        }
+
+        public string ReadString() {
+            int length = ReadInt();
+            string s = Encoding.UTF8.GetString(Read(length));
+            return s;
+        }
+
+        public byte[] Read(int amount) {
+            byte[] bytes = Bytes.GetRange(pos, amount).ToArray();
+            pos += amount;
+            return bytes;
+        }
+
+        public byte Read() {
+            return Bytes[pos++];
+        }
+
+        public void WriteInt(int i) {
+            Bytes.AddRange(BitConverter.GetBytes(i));
+        }
+
+        public void WriteString(string s) {
+            byte[] bytes = Encoding.UTF8.GetBytes(s);
+            WriteInt(bytes.Length);
+            Bytes.AddRange(bytes);
+        }
+
+        public void Write(byte b) {
+            Bytes.Add(b);
+        }
+
+        public bool ReadFingerprint(byte[] fingerprint) {
+            foreach (byte b in fingerprint) {
+                if (!(CanRead() && Read() == b)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        public PacketStage ReadStage() {
+            PacketStage stage = PacketStage.Closed;
+            switch (Read()) {
+                case 0:
+                    stage = PacketStage.Establishing;
+                    break;
+                case 1:
+                    stage = PacketStage.Rejected;
+                    break;
+                case 2:
+                    stage = PacketStage.Closed;
+                    break;
+                case 3:
+                    stage = PacketStage.Ready;
+                    break;
+            }
+            return stage;
+        }
+
+        public ClosingReason ReadClosingReason() {
+            ClosingReason reason = ClosingReason.Unknown;
+            switch (Read()) {
+                case 0:
+                    reason = ClosingReason.Unknown;
+                    break;
+            }
+            return reason;
+        }
+    }
+
+}

Assets/Scripts/Net/Packets/Packet.cs.meta

@@ -1,5 +1,5 @@
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-guid: 08642b59bb65292409a46c688efbf134
+guid: 32ad4f04beca6dd4db5cdea5cc66e648
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/Scripts/Net/Packets/Protocol.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using System;
+
+using NeonTea.Quakeball.Net.Peers;
+
+
+namespace NeonTea.Quakeball.Net.Packets {
+    public abstract class Protocol {
+        private Dictionary<Type, int> PacketToId = new Dictionary<Type, int>();
+        private Dictionary<int, Type> IdToPacket = new Dictionary<int, Type>();
+        private int PacketIdCounter;
+
+        public Peer Peer;
+
+        public abstract byte Identifier { get; }
+        public abstract string Version { get; }
+
+        public abstract void Receive(Connection conn, Packet packet);
+        public abstract void ConnectionStatusChanged(ConnectionStatus oldStatus, ConnectionStatus newStatus, Connection conn);
+        public abstract void Timeout(Connection conn);
+
+        public void SendPacket(Packet p, Connection conn) {
+            Peer.ConnectionManager.AddPacketToQueue(conn, p);
+            Peer.ConnectionManager.SendPacketQueue(conn);
+        }
+
+        public int RegisterPacket(Type t) {
+            if (t.BaseType != typeof(Packet) || PacketToId.ContainsKey(t)) {
+                return -1;
+            }
+            int id = PacketIdCounter++;
+            PacketToId.Add(t, id);
+            IdToPacket.Add(id, t);
+            return id;
+        }
+
+        public ByteBuffer BuildMessage(Connection connection) {
+            ByteBuffer buffer = new ByteBuffer();
+            foreach (byte b in Peer.Fingerprint) {
+                buffer.Write(b);
+            }
+            buffer.Write(Identifier);
+            if (connection.Status == ConnectionStatus.Establishing) {
+                Peer.MessageListener.Message("Sending Establishing");
+                buffer.Write((byte)PacketStage.Establishing);
+                buffer.WriteString(Version);
+            } else if (connection.Status == ConnectionStatus.Closed) {
+                buffer.Write((byte)PacketStage.Closed);
+            } else if (connection.Status == ConnectionStatus.Rejected) {
+                buffer.Write((byte)PacketStage.Rejected);
+                buffer.Write((byte)connection.ClosingReason);
+            } else if (connection.Status == ConnectionStatus.Ready) {
+                buffer.Write((byte)PacketStage.Ready);
+                buffer.WriteInt(connection.LatestPacketReceived);
+            }
+            return buffer;
+        }
+
+        public int GetPacketID(Packet packet) {
+            return PacketToId[packet.GetType()];
+        }
+
+        public Type GetPacketType(int id) {
+            return IdToPacket[id];
+        }
+    }
+}

Assets/Scripts/Net/Packets/Protocol.cs.meta

@@ -1,5 +1,5 @@
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-guid: ffeef21f11f5f864f9213c2822a05d38
+guid: 7767effb4937ff34aa9262202afa3a46
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   externalObjects: {}
   serializedVersion: 2

Assets/Scripts/Net/Peers/Client.cs

@@ -1,27 +0,0 @@
-using System.Collections.Generic;
-using UnityEngine;
-using System;
-using System.Net.Sockets;
-using System.Text;
-using System.Net;
-
-namespace NeonTea.Quakeball.Net.Peers {
-    public class Client : Peer {
-
-        public override void OnStart(string host, int port) {
-            SendBytes(Encoding.UTF8.GetBytes("Hello! This is testing."), MainConnection.Endpoint);
-
-            Debug.Log($"Client started at {host}:{port}!");
-        }
-
-        public override void HandlePacket(IPEndPoint endpoint, ByteReader reader) {
-            if (endpoint.Equals(MainConnection.Endpoint)) {
-                Debug.Log("Got stuff!");
-            }
-        }
-
-        public override void OnStop(DisconnectReason reason) {
-            Debug.Log($"Client closed: {reason.Description}");
-        }
-    }
-}

Assets/Scripts/Net/Peers/ConnectionManager.cs

@@ -0,0 +1,200 @@
+using UnityEngine;
+using System.Collections.Generic;
+using System.Net;
+using System.Threading;
+using System;
+using NeonTea.Quakeball.Net.Packets;
+
+namespace NeonTea.Quakeball.Net.Peers {
+    public class ConnectionManager {
+        private Dictionary<IPEndPoint, Connection> Connections = new Dictionary<IPEndPoint, Connection>();
+        private Dictionary<Connection, List<Packet>> PacketQueue = new Dictionary<Connection, List<Packet>>();
+        private Peer Peer;
+
+        private Thread UpdateThread;
+        private long LastUpdate;
+
+        public long Timeout = 8000;
+        public long Frequency = 100;
+
+        public ConnectionManager(Peer peer) {
+            Peer = peer;
+            UpdateThread = new Thread(new ThreadStart(UpdateThreadMethod));
+            UpdateThread.Start();
+        }
+
+        public void StopThread() {
+            UpdateThread.Abort();
+        }
+
+        public Connection Find(IPEndPoint endpoint) {
+            if (Connections.ContainsKey(endpoint)) {
+                return Connections[endpoint];
+            }
+            Connection conn = new Connection(endpoint, ConnectionStatus.Awaiting);
+            Connections.Add(endpoint, conn);
+            PacketQueue.Add(conn, new List<Packet>());
+            return conn;
+        }
+
+        public bool StartConnection(IPEndPoint endpoint, byte protocolIdent) {
+            if (Connections.ContainsKey(endpoint)) {
+                return false;
+            }
+            Connection conn = new Connection(endpoint);
+            conn.AssignedProtocol = protocolIdent;
+            Connections.Add(endpoint, conn);
+            PacketQueue.Add(conn, new List<Packet>());
+            return true;
+        }
+
+        public void AddPacketToQueue(Connection conn, Packet p) {
+            p.id = conn.PacketIDCounter++;
+            PacketQueue[conn].Add(p);
+        }
+
+        public void SendPacketQueue(Connection conn) {
+            Protocol protocol = Peer.GetProtocol(conn.AssignedProtocol);
+            if (protocol != null) {
+                ByteBuffer buffer = protocol.BuildMessage(conn);
+                List<Packet> list = PacketQueue[conn];
+                buffer.WriteInt(list.Count);
+                foreach (Packet p in list) {
+                    buffer.WriteInt(protocol.GetPacketID(p));
+                    p.Write(buffer);
+                }
+                Send(conn, buffer);
+            }
+        }
+
+        public void SendSinglePacket(Connection conn, Packet p) {
+            Protocol protocol = Peer.GetProtocol(conn.AssignedProtocol);
+            if (protocol != null) {
+                ByteBuffer buffer = protocol.BuildMessage(conn);
+                buffer.WriteInt(1);
+                buffer.WriteInt(protocol.GetPacketID(p));
+                p.Write(buffer);
+                Send(conn, buffer);
+            }
+        }
+
+        private void SendPlain(Connection conn) {
+            Protocol protocol = Peer.GetProtocol(conn.AssignedProtocol);
+            if (protocol != null) {
+                ByteBuffer buffer = protocol.BuildMessage(conn);
+                Send(conn, buffer);
+            }
+        }
+
+        private void Send(Connection conn, ByteBuffer buffer) {
+            if (conn.Status == ConnectionStatus.Lost) {
+                return;
+            }
+            byte[] bytes = buffer.Pack();
+            Peer.ListenerThread.LastSentConnection = conn;
+            Peer.UdpClient.Send(bytes, bytes.Length, conn.Endpoint);
+        }
+
+        public void Handle(IPEndPoint endpoint, ByteBuffer buffer) {
+            Connection conn = Find(endpoint);
+            conn.LastMessage = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+            ConnectionStatus oldStatus = conn.Status;
+            byte protocolId = buffer.Read();
+            Protocol protocol = Peer.GetProtocol(protocolId);
+            PacketStage stage = buffer.ReadStage();
+            switch (stage) {
+                case PacketStage.Establishing:
+                    if (conn.Status == ConnectionStatus.Awaiting) {
+                        conn.AssignedProtocol = protocolId;
+                        string version = buffer.ReadString();
+                        if (protocol == null || !version.Equals(protocol.Version)) {
+                            conn.Status = ConnectionStatus.Rejected;
+                            conn.ClosingReason = ClosingReason.Unknown;
+                        } else {
+                            conn.Status = ConnectionStatus.Ready;
+                        }
+                        if (protocol != null) {
+                            protocol.ConnectionStatusChanged(oldStatus, conn.Status, conn);
+                        }
+                    }
+                    break;
+                case PacketStage.Rejected:
+                    conn.Status = ConnectionStatus.Closed;
+                    conn.ClosingReason = buffer.ReadClosingReason();
+                    if (protocol != null) {
+                        protocol.ConnectionStatusChanged(oldStatus, conn.Status, conn);
+                    }
+                    break;
+                case PacketStage.Closed:
+                    conn.Status = ConnectionStatus.Stopped;
+                    if (protocol != null) {
+                        protocol.ConnectionStatusChanged(oldStatus, conn.Status, conn);
+                    }
+                    break;
+                case PacketStage.Ready:
+                    if (conn.AssignedProtocol != protocolId || protocol == null) {
+                        break;
+                    }
+                    if (oldStatus == ConnectionStatus.Establishing) {
+                        conn.Status = ConnectionStatus.Ready;
+                        protocol.ConnectionStatusChanged(oldStatus, conn.Status, conn);
+                    }
+                    conn.LatestPacketSent = buffer.ReadInt();
+                    List<Packet> list = PacketQueue[conn];
+                    list.RemoveAll(p => p.id <= conn.LatestPacketSent);
+                    PacketQueue[conn] = list;
+
+                    int PacketAmount = buffer.ReadInt();
+                    for (int i = 0; i < PacketAmount; i++) {
+                        int id = buffer.ReadInt();
+                        conn.LatestPacketReceived = Math.Max(conn.LatestPacketReceived, id);
+                        Type t = protocol.GetPacketType(id);
+                        Packet p = (Packet)Activator.CreateInstance(t);
+                        p.Read(buffer);
+                        protocol.Receive(conn, p);
+                    }
+                    break;
+            }
+        }
+
+        private void UpdateThreadMethod() {
+            try {
+                while (true) {
+                    long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
+                    if ((now - LastUpdate) > Frequency) {
+                        LastUpdate = now;
+                        List<KeyValuePair<IPEndPoint, Connection>> timedOut = new List<KeyValuePair<IPEndPoint, Connection>>();
+                        foreach (KeyValuePair<IPEndPoint, Connection> pair in Connections) {
+                            Connection conn = pair.Value;
+                            if ((now - conn.LastMessage) > Timeout || conn.Status == ConnectionStatus.Lost) {
+                                timedOut.Add(pair);
+                            }
+                            if (conn.Status != ConnectionStatus.Awaiting || conn.Status != ConnectionStatus.Stopped) {
+                                if (conn.Status == ConnectionStatus.Ready) {
+                                    SendPacketQueue(conn);
+                                } else {
+                                    SendPlain(conn);
+                                }
+                            }
+                        }
+                        foreach (KeyValuePair<IPEndPoint, Connection> pair in timedOut) {
+                            Connections.Remove(pair.Key);
+                            PacketQueue.Remove(pair.Value);
+                            if (pair.Value.Status == ConnectionStatus.Ready
+                                || pair.Value.Status == ConnectionStatus.Establishing
+                                || pair.Value.Status == ConnectionStatus.Awaiting
+                                || pair.Value.Status == ConnectionStatus.Lost) {
+                                Protocol protocol = Peer.GetProtocol(pair.Value.AssignedProtocol);
+                                if (protocol != null) {
+                                    protocol.Timeout(pair.Value);
+                                }
+                            }
+                        }
+                    }
+                }
+            } catch (ThreadAbortException e) {
+                Debug.Log("Connection Thread Stopped");
+            }
+        }
+    }
+}

Assets/Scripts/Net/Peers/ConnectionManager.cs.meta

@@ -0,0 +1,11 @@
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+guid: 7a3471929fd5c5944be0ca1a0c52ef4a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Net/Peers/ListenerThread.cs

@@ -0,0 +1,71 @@
+using UnityEngine;
+using System.Net;
+using System;
+using System.Net.Sockets;
+using System.Threading;
+
+using NeonTea.Quakeball.Net.Packets;
+
+namespace NeonTea.Quakeball.Net.Peers {
+    public class ListenerThread {
+        private IPEndPoint EndPoint;
+        private Thread Thread;
+        private Peer Peer;
+
+        public Connection LastSentConnection;
+
+        private static int[] CONN_LOST_CODES = new int[] { 10054, 10051 };
+
+        public ListenerThread(Peer peer, IPEndPoint endpoint) {
+            EndPoint = endpoint;
+            Peer = peer;
+        }
+
+
+        public bool Start() {
+            if (Thread != null) {
+                return false;
+            }
+            Thread t = new Thread(new ThreadStart(ListenThreadMethod));
+
+            t.Start();
+            Thread = t;
+            return true;
+        }
+
+        public bool Stop() {
+            if (Thread == null) {
+                return false;
+            }
+            Debug.Log("Stopping ListenerThread!");
+            Thread.Abort();
+            return true;
+        }
+
+        private void ListenThreadMethod() {
+            try {
+                while (true) {
+                    IPEndPoint Listened = new IPEndPoint(EndPoint.Address, EndPoint.Port);
+                    ByteBuffer Buffer = new ByteBuffer();
+                    try {
+                        Buffer = new ByteBuffer(Peer.UdpClient.Receive(ref Listened));
+                    } catch (SocketException e) {
+                        if (Array.Exists(CONN_LOST_CODES, x => x == e.ErrorCode)) {
+                            if (LastSentConnection != null) {
+                                LastSentConnection.Status = ConnectionStatus.Lost;
+                                Peer.MessageListener.Message($"Connection lost to {LastSentConnection.Endpoint}: {e.ToString()}");
+                            }
+                        } else {
+                            Peer.MessageListener.Message($"Listener error: {e.ToString()}");
+                        }
+                    }
+                    if (Buffer.ReadFingerprint(Peer.Fingerprint)) {
+                        Peer.ConnectionManager.Handle(Listened, Buffer);
+                    }
+                }
+            } catch (ThreadAbortException e) {
+                Debug.Log("Listener Thread stopped");
+            }
+        }
+    }
+}

Assets/Scripts/Net/Peers/ListenerThread.cs.meta

@@ -0,0 +1,11 @@
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+guid: cb30bb5582d404341a6e14bae841e642
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+  defaultReferences: []
+  executionOrder: 0
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+  userData: 
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Assets/Scripts/Net/Peers/Peer.cs

@@ -4,49 +4,82 @@ using System;
 using System.Net;
 using System.Net.Sockets;
 using System.Threading;
+using NeonTea.Quakeball.Net.Packets;
+using System.Threading.Tasks;
+using System.Runtime.Remoting;
 
 namespace NeonTea.Quakeball.Net.Peers {
-    public abstract class Peer {
+    public class Peer : PeerMessageListener {
-        private Thread ListenThread;
+        public UdpClient UdpClient { get; private set; }
+        public byte[] Fingerprint { get; private set; }
 
-        public byte[] Fingerprint = new byte[] { 0xCA, 0x11, 0x7F, 0xF8 };
+        public ListenerThread ListenerThread;
+        public ConnectionManager ConnectionManager;
+        public Dictionary<byte, Protocol> RegisteredProtocols = new Dictionary<byte, Protocol>();
 
-        protected UdpClient UdpClient;
+        public PeerMessageListener MessageListener;
-        protected Connection MainConnection;
 
-        public abstract void OnStart(string orighost, int origport);
+        public Peer(byte[] fingerprint) {
-        public abstract void OnStop(DisconnectReason reason);
+            Fingerprint = fingerprint;
-        public abstract void HandlePacket(IPEndPoint endpoint, ByteReader reader);
+            ConnectionManager = new ConnectionManager(this);
-
+            MessageListener = this;
-        public void Start(string host, int port) {
-            int own_port = port;
-            if (this.GetType() == typeof(Client)) {
-                own_port = 0;
-            }
-            UdpClient = new UdpClient(own_port);
-
-            try {
-                MainConnection = new Connection(new IPEndPoint(FindAddress(host), port));
-            } catch (Exception e) {
-                Debug.Log($"Failed to create initial connection: {e.ToString()}");
-                Net.Singleton.Stop(new DisconnectReason(Reason.INITIAL_ERROR, e.ToString()));
-                return;
-            }
-            StartListen(MainConnection);
-
-            OnStart(host, port);
         }
 
-        public void Stop(DisconnectReason reason) {
+        public void Start(int sending_port) {
+            UdpClient = new UdpClient(sending_port);
+            MessageListener.Message("UdpClient Started");
+        }
+
+        public void Stop() {
+            ConnectionManager.StopThread();
+            if (ListenerThread != null) {
+                ListenerThread.Stop();
+            }
+            UdpClient.Dispose();
             UdpClient.Close();
-            if (ListenThread != null) {
-                ListenThread.Abort();
-            }
-            MainConnection.Status = ConnectionStatus.Closed;
-            OnStop(reason);
         }
 
-        protected IPAddress FindAddress(string host) {
+        public void StartListen(string address, int port) {
+            IPEndPoint endpoint = new IPEndPoint(FindAddress(address), port);
+            StartListen(endpoint);
+        }
+
+        private void StartListen(IPEndPoint endpoint) {
+            ListenerThread = new ListenerThread(this, endpoint);
+            ListenerThread.Start();
+            MessageListener.Message($"Started listening to {endpoint}");
+        }
+
+        public void Connect(string address, int port, byte protocolIdent) {
+            IPEndPoint listenEndpoint = (IPEndPoint)UdpClient.Client.LocalEndPoint;
+            StartListen(listenEndpoint);
+            IPEndPoint endpoint = new IPEndPoint(FindAddress(address), port);
+            ConnectionManager.StartConnection(endpoint, protocolIdent);
+            MessageListener.Message($"Connecting to {endpoint}");
+        }
+
+        public byte RegisterProtocol(Protocol protocol) {
+            byte ident = protocol.Identifier;
+            if (RegisteredProtocols.ContainsKey(ident)) {
+                return 0;
+            }
+            RegisteredProtocols.Add(ident, protocol);
+            protocol.Peer = this;
+            return ident;
+        }
+
+        public Protocol GetProtocol(byte ident) {
+            if (RegisteredProtocols.ContainsKey(ident)) {
+                return RegisteredProtocols[ident];
+            }
+            return null;
+        }
+
+        public void Message(string msg) {
+
+        }
+
+        public IPAddress FindAddress(string host) {
             IPAddress addr;
             try {
                 addr = Dns.GetHostAddresses(host)[0];
@@ -55,85 +88,9 @@ namespace NeonTea.Quakeball.Net.Peers {
             }
             return addr;
         }
-
-        protected void SendBytes(byte[] bytes, IPEndPoint endpoint) {
-            if (bytes != null) {
-                List<byte> ByteList = new List<byte>();
-                ByteList.AddRange(Fingerprint);
-                ByteList.AddRange(bytes);
-                byte[] sent = ByteList.ToArray();
-                UdpClient.Send(sent, sent.Length, endpoint);
-            }
     }
 
-        private bool StartListen(Connection connection) {
+    public interface PeerMessageListener {
-            if (ListenThread != null) {
+        void Message(string msg);
-                return false;
-            }
-            Thread t = new Thread(ListenThreadMethod);
-            t.Start(connection);
-            ListenThread = t;
-            return true;
-        }
-
-        private void ListenThreadMethod(object obj) {
-            Connection listened;
-            try {
-                listened = (Connection)obj;
-            } catch (InvalidCastException) {
-                Debug.Log($"Can not cast {obj} to a Connection");
-                return;
-            }
-            while (listened.Status != ConnectionStatus.Closed) {
-                try {
-                    IPEndPoint Listened = new IPEndPoint(listened.Endpoint.Address, listened.Endpoint.Port);
-                    ByteReader Received = new ByteReader(UdpClient.Receive(ref Listened));
-                    foreach (byte b in Fingerprint) {
-                        if (!(Received.hasNext() && Received.next() == b)) {
-                            goto end_of_handle;
-                        }
-                    }
-                    HandlePacket(Listened, Received);
-                } catch (Exception e) {
-                    Net.Singleton.Stop(new DisconnectReason(Reason.LISTENING_ERROR, e.ToString()));
-                }
-            end_of_handle: { };
-            }
-        }
-    }
-
-    public class ByteReader {
-        private byte[] ByteList;
-        private uint pos = 0;
-
-        public ByteReader(byte[] list) {
-            ByteList = list;
-        }
-
-        public bool hasNext() {
-            return pos < ByteList.Length;
-        }
-
-        public byte next() {
-            return ByteList[pos++];
-        }
-    }
-
-    public struct DisconnectReason {
-        public static DisconnectReason LOCAL_MANUAL = new DisconnectReason(Reason.LOCAL_MANUAL, "");
-
-        public Reason Reason;
-        public string Description;
-
-        public DisconnectReason(Reason reason, string description) {
-            Reason = reason;
-            Description = description;
-        }
-    }
-
-    public enum Reason {
-        LOCAL_MANUAL,
-        LISTENING_ERROR,
-        INITIAL_ERROR,
     }
 }

Assets/Scripts/Net/Peers/Server.cs

@@ -1,35 +0,0 @@
-using System.Collections.Generic;
-using UnityEngine;
-using System.Net;
-
-namespace NeonTea.Quakeball.Net.Peers {
-    public class Server : Peer {
-
-        private static uint ConnectionUUIDCounter;
-        private Dictionary<IPEndPoint, Connection> Connections = new Dictionary<IPEndPoint, Connection>();
-
-        public override void OnStart(string host, int port) {
-            MainConnection.Status = ConnectionStatus.Ready;
-            Debug.Log($"Server started at {host}:{port}!");
-        }
-
-        public override void OnStop(DisconnectReason reason) {
-            Debug.Log($"Server closed: {reason.Description}");
-        }
-
-        public override void HandlePacket(IPEndPoint endpoint, ByteReader reader) {
-            if (Connections.ContainsKey(endpoint)) {
-                Debug.Log("Got stuff from an existing connection!");
-            } else {
-                Connections.Add(endpoint, new Connection(endpoint));
-                Debug.Log($"Initialized new connection from {endpoint.ToString()}");
-            }
-        }
-
-        private Connection AddConnection(IPEndPoint endpoint) {
-            Connection conn = new Connection(endpoint);
-            Connections.Add(endpoint, conn);
-            return conn;
-        }
-    }
-}

Assets/Scripts/Net/TestProtocol.cs

@@ -0,0 +1,27 @@
+using System.Collections.Generic;
+using System;
+using UnityEngine;
+using NeonTea.Quakeball.Net.Peers;
+using NeonTea.Quakeball.Net;
+using NeonTea.Quakeball.Net.Packets;
+
+namespace NeonTea.Quakeball.Net {
+
+    public class TestProtocol : Protocol {
+        public override byte Identifier => 0x7A;
+
+        public override string Version => "0.0.1";
+
+        public override void ConnectionStatusChanged(ConnectionStatus oldStatus, ConnectionStatus newStatus, Connection conn) {
+            Peer.MessageListener.Message($"Connection Status Changed into {newStatus.ToString()} for {conn.Endpoint}");
+        }
+
+        public override void Receive(Connection conn, Packet packet) {
+            Peer.MessageListener.Message($"Received packet from {conn.Endpoint}");
+        }
+
+        public override void Timeout(Connection conn) {
+            Peer.MessageListener.Message($"Closed {conn.Endpoint} for Timeout");
+        }
+    }
+}

Assets/Scripts/Net/TestProtocol.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: df23a50fdd8df89489adbb9e8b4f1a87
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

ProjectSettings/ProjectSettings.asset

@@ -128,6 +128,7 @@ PlayerSettings:
   bundleVersion: 0.1
   preloadedAssets:
   - {fileID: 0}
+  - {fileID: 0}
   metroInputSource: 0
   wsaTransparentSwapchain: 0
   m_HolographicPauseOnTrackingLoss: 1