Add LiteNetLibTransport

Packages/packages-lock.json

       "dependencies": {},
       "hash": "c4a9ab0da78e366f6f7fdf2d337455cc1d94dbb0"
     },
+    "com.unity.multiplayer.transport.litenet": {
+      "version": "file:com.unity.multiplayer.transport.litenet",
+      "depth": 0,
+      "source": "embedded",
+      "dependencies": {
+        "com.unity.multiplayer.mlapi": "0.0.1-preview.1"
+      }
+    },
     "com.unity.test-framework": {
       "version": "1.1.16",
       "depth": 0,

Packages/com.unity.multiplayer.transport.litenet/CHANGELOG.md

+Changelog
+All notable changes to this package will be documented in this file. The format is based on Keep a Changelog
+
+[0.0.1-preview.1] - 2020-10-05
+This is the first release of Enet MLAPI Package

Packages/com.unity.multiplayer.transport.litenet/CHANGELOG.md.meta

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Packages/com.unity.multiplayer.transport.litenet/LICENSE.md

+MIT License
+
+Copyright (c) 2018, 2019 Albin Corén
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Packages/com.unity.multiplayer.transport.litenet/LICENSE.md.meta

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Packages/com.unity.multiplayer.transport.litenet/README.md

+Enet transport for MLAPI

Packages/com.unity.multiplayer.transport.litenet/README.md.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/BaseChannel.cs

+using System.Collections.Generic;
+
+namespace LiteNetLib
+{
+    internal abstract class BaseChannel
+    {
+        public BaseChannel Next;
+        protected readonly NetPeer Peer;
+        protected readonly Queue<NetPacket> OutgoingQueue;
+
+        protected BaseChannel(NetPeer peer)
+        {
+            Peer = peer;
+            OutgoingQueue = new Queue<NetPacket>(64);
+        }
+
+        public int PacketsInQueue
+        {
+            get { return OutgoingQueue.Count; }
+        }
+
+        public void AddToQueue(NetPacket packet)
+        {
+            lock (OutgoingQueue)
+                OutgoingQueue.Enqueue(packet);
+        }
+
+        public abstract void SendNextPackets();
+        public abstract bool ProcessPacket(NetPacket packet);
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/BaseChannel.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/ConnectionRequest.cs

+using System.Net;
+using System.Threading;
+using LiteNetLib.Utils;
+
+namespace LiteNetLib
+{
+    internal enum ConnectionRequestResult
+    {
+        None,
+        Accept,
+        Reject,
+        RejectForce
+    }
+
+    public class ConnectionRequest
+    {
+        private readonly NetManager _listener;
+        private int _used;
+
+        public readonly NetDataReader Data;
+
+        internal ConnectionRequestResult Result { get; private set; }
+        internal long ConnectionTime;
+        internal byte ConnectionNumber;
+        public readonly IPEndPoint RemoteEndPoint;
+
+        private bool TryActivate()
+        {
+            return Interlocked.CompareExchange(ref _used, 1, 0) == 0;
+        }
+
+        internal void UpdateRequest(NetConnectRequestPacket connRequest)
+        {
+            if (connRequest.ConnectionTime >= ConnectionTime)
+            {
+                ConnectionTime = connRequest.ConnectionTime;
+                ConnectionNumber = connRequest.ConnectionNumber;
+            }
+        }
+
+        internal ConnectionRequest(
+            long connectionId,
+            byte connectionNumber,
+            NetDataReader netDataReader,
+            IPEndPoint endPoint,
+            NetManager listener)
+        {
+            ConnectionTime = connectionId;
+            ConnectionNumber = connectionNumber;
+            RemoteEndPoint = endPoint;
+            Data = netDataReader;
+            _listener = listener;
+        }
+
+        public NetPeer AcceptIfKey(string key)
+        {
+            if (!TryActivate())
+                return null;
+            try
+            {
+                if (Data.GetString() == key)
+                    Result = ConnectionRequestResult.Accept;
+            }
+            catch
+            {
+                NetDebug.WriteError("[AC] Invalid incoming data");
+            }
+            if (Result == ConnectionRequestResult.Accept)
+                return _listener.OnConnectionSolved(this, null, 0, 0);
+
+            Result = ConnectionRequestResult.Reject;
+            _listener.OnConnectionSolved(this, null, 0, 0);
+            return null;
+        }
+
+        /// <summary>
+        /// Accept connection and get new NetPeer as result
+        /// </summary>
+        /// <returns>Connected NetPeer</returns>
+        public NetPeer Accept()
+        {
+            if (!TryActivate())
+                return null;
+            Result = ConnectionRequestResult.Accept;
+            return _listener.OnConnectionSolved(this, null, 0, 0);
+        }
+        
+        public void Reject(byte[] rejectData, int start, int length, bool force)
+        {
+            if (!TryActivate())
+                return;
+            Result = force ? ConnectionRequestResult.RejectForce : ConnectionRequestResult.Reject;
+            _listener.OnConnectionSolved(this, rejectData, start, length);
+        }
+
+        public void Reject(byte[] rejectData, int start, int length)
+        {
+            Reject(rejectData, start, length, false);
+        }
+
+
+        public void RejectForce(byte[] rejectData, int start, int length)
+        {
+            Reject(rejectData, start, length, true);
+        }
+
+        public void RejectForce()
+        {
+            Reject(null, 0, 0, true);
+        }
+
+        public void RejectForce(byte[] rejectData)
+        {
+            Reject(rejectData, 0, rejectData.Length, true);
+        }
+
+        public void RejectForce(NetDataWriter rejectData)
+        {
+            Reject(rejectData.Data, 0, rejectData.Length, true);
+        }
+
+        public void Reject()
+        {
+            Reject(null, 0, 0, false);
+        }
+
+        public void Reject(byte[] rejectData)
+        {
+            Reject(rejectData, 0, rejectData.Length, false);
+        }
+
+        public void Reject(NetDataWriter rejectData)
+        {
+            Reject(rejectData.Data, 0, rejectData.Length, false);
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/ConnectionRequest.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/INetEventListener.cs

+using System.Net;
+using System.Net.Sockets;
+
+namespace LiteNetLib
+{
+    /// <summary>
+    /// Type of message that you receive in OnNetworkReceiveUnconnected event
+    /// </summary>
+    public enum UnconnectedMessageType
+    {
+        BasicMessage,
+        Broadcast
+    }
+
+    /// <summary>
+    /// Disconnect reason that you receive in OnPeerDisconnected event
+    /// </summary>
+    public enum DisconnectReason
+    {
+        ConnectionFailed,
+        Timeout,
+        HostUnreachable,
+        NetworkUnreachable,
+        RemoteConnectionClose,
+        DisconnectPeerCalled,
+        ConnectionRejected,
+        InvalidProtocol,
+        UnknownHost,
+        Reconnect,
+        PeerToPeerConnection
+    }
+
+    /// <summary>
+    /// Additional information about disconnection
+    /// </summary>
+    public struct DisconnectInfo
+    {
+        /// <summary>
+        /// Additional info why peer disconnected
+        /// </summary>
+        public DisconnectReason Reason;
+
+        /// <summary>
+        /// Error code (if reason is SocketSendError or SocketReceiveError)
+        /// </summary>
+        public SocketError SocketErrorCode;
+
+        /// <summary>
+        /// Additional data that can be accessed (only if reason is RemoteConnectionClose)
+        /// </summary>
+        public NetPacketReader AdditionalData;
+    }
+
+    public interface INetEventListener
+    {
+        /// <summary>
+        /// New remote peer connected to host, or client connected to remote host
+        /// </summary>
+        /// <param name="peer">Connected peer object</param>
+        void OnPeerConnected(NetPeer peer);
+
+        /// <summary>
+        /// Peer disconnected
+        /// </summary>
+        /// <param name="peer">disconnected peer</param>
+        /// <param name="disconnectInfo">additional info about reason, errorCode or data received with disconnect message</param>
+        void OnPeerDisconnected(NetPeer peer, DisconnectInfo disconnectInfo);
+
+        /// <summary>
+        /// Network error (on send or receive)
+        /// </summary>
+        /// <param name="endPoint">From endPoint (can be null)</param>
+        /// <param name="socketError">Socket error</param>
+        void OnNetworkError(IPEndPoint endPoint, SocketError socketError);
+
+        /// <summary>
+        /// Received some data
+        /// </summary>
+        /// <param name="peer">From peer</param>
+        /// <param name="reader">DataReader containing all received data</param>
+        /// <param name="deliveryMethod">Type of received packet</param>
+        void OnNetworkReceive(NetPeer peer, NetPacketReader reader, DeliveryMethod deliveryMethod);
+
+        /// <summary>
+        /// Received unconnected message
+        /// </summary>
+        /// <param name="remoteEndPoint">From address (IP and Port)</param>
+        /// <param name="reader">Message data</param>
+        /// <param name="messageType">Message type (simple, discovery request or response)</param>
+        void OnNetworkReceiveUnconnected(IPEndPoint remoteEndPoint, NetPacketReader reader, UnconnectedMessageType messageType);
+
+        /// <summary>
+        /// Latency information updated
+        /// </summary>
+        /// <param name="peer">Peer with updated latency</param>
+        /// <param name="latency">latency value in milliseconds</param>
+        void OnNetworkLatencyUpdate(NetPeer peer, int latency);
+
+        /// <summary>
+        /// On peer connection requested
+        /// </summary>
+        /// <param name="request">Request information (EndPoint, internal id, additional data)</param>
+        void OnConnectionRequest(ConnectionRequest request);
+    }
+
+    public interface IDeliveryEventListener
+    {
+        /// <summary>
+        /// On reliable message delivered
+        /// </summary>
+        /// <param name="peer"></param>
+        /// <param name="userData"></param>
+        void OnMessageDelivered(NetPeer peer, object userData);
+    }
+
+    public class EventBasedNetListener : INetEventListener, IDeliveryEventListener
+    {
+        public delegate void OnPeerConnected(NetPeer peer);
+        public delegate void OnPeerDisconnected(NetPeer peer, DisconnectInfo disconnectInfo);
+        public delegate void OnNetworkError(IPEndPoint endPoint, SocketError socketError);
+        public delegate void OnNetworkReceive(NetPeer peer, NetPacketReader reader, DeliveryMethod deliveryMethod);
+        public delegate void OnNetworkReceiveUnconnected(IPEndPoint remoteEndPoint, NetPacketReader reader, UnconnectedMessageType messageType);
+        public delegate void OnNetworkLatencyUpdate(NetPeer peer, int latency);
+        public delegate void OnConnectionRequest(ConnectionRequest request);
+        public delegate void OnDeliveryEvent(NetPeer peer, object userData);
+
+        public event OnPeerConnected PeerConnectedEvent;
+        public event OnPeerDisconnected PeerDisconnectedEvent;
+        public event OnNetworkError NetworkErrorEvent;
+        public event OnNetworkReceive NetworkReceiveEvent;
+        public event OnNetworkReceiveUnconnected NetworkReceiveUnconnectedEvent;
+        public event OnNetworkLatencyUpdate NetworkLatencyUpdateEvent;
+        public event OnConnectionRequest ConnectionRequestEvent;
+        public event OnDeliveryEvent DeliveryEvent;
+
+        public void ClearPeerConnectedEvent()
+        {
+            PeerConnectedEvent = null;
+        }
+
+        public void ClearPeerDisconnectedEvent()
+        {
+            PeerDisconnectedEvent = null;
+        }
+
+        public void ClearNetworkErrorEvent()
+        {
+            NetworkErrorEvent = null;
+        }
+
+        public void ClearNetworkReceiveEvent()
+        {
+            NetworkReceiveEvent = null;
+        }
+
+        public void ClearNetworkReceiveUnconnectedEvent()
+        {
+            NetworkReceiveUnconnectedEvent = null;
+        }
+
+        public void ClearNetworkLatencyUpdateEvent()
+        {
+            NetworkLatencyUpdateEvent = null;
+        }
+
+        public void ClearConnectionRequestEvent()
+        {
+            ConnectionRequestEvent = null;
+        }
+
+        public void ClearDeliveryEvent()
+        {
+            DeliveryEvent = null;
+        }
+
+        void INetEventListener.OnPeerConnected(NetPeer peer)
+        {
+            if (PeerConnectedEvent != null)
+                PeerConnectedEvent(peer);
+        }
+
+        void INetEventListener.OnPeerDisconnected(NetPeer peer, DisconnectInfo disconnectInfo)
+        {
+            if (PeerDisconnectedEvent != null)
+                PeerDisconnectedEvent(peer, disconnectInfo);
+        }
+
+        void INetEventListener.OnNetworkError(IPEndPoint endPoint, SocketError socketErrorCode)
+        {
+            if (NetworkErrorEvent != null)
+                NetworkErrorEvent(endPoint, socketErrorCode);
+        }
+
+        void INetEventListener.OnNetworkReceive(NetPeer peer, NetPacketReader reader, DeliveryMethod deliveryMethod)
+        {
+            if (NetworkReceiveEvent != null)
+                NetworkReceiveEvent(peer, reader, deliveryMethod);
+        }
+
+        void INetEventListener.OnNetworkReceiveUnconnected(IPEndPoint remoteEndPoint, NetPacketReader reader, UnconnectedMessageType messageType)
+        {
+            if (NetworkReceiveUnconnectedEvent != null)
+                NetworkReceiveUnconnectedEvent(remoteEndPoint, reader, messageType);
+        }
+
+        void INetEventListener.OnNetworkLatencyUpdate(NetPeer peer, int latency)
+        {
+            if (NetworkLatencyUpdateEvent != null)
+                NetworkLatencyUpdateEvent(peer, latency);
+        }
+
+        void INetEventListener.OnConnectionRequest(ConnectionRequest request)
+        {
+            if (ConnectionRequestEvent != null)
+                ConnectionRequestEvent(request);
+        }
+
+        void IDeliveryEventListener.OnMessageDelivered(NetPeer peer, object userData)
+        {
+            if (DeliveryEvent != null)
+                DeliveryEvent(peer, userData);
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/INetEventListener.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/Crc32cLayer.cs

+using LiteNetLib.Utils;
+using System;
+
+namespace LiteNetLib.Layers
+{
+    public sealed class Crc32cLayer : PacketLayerBase
+    {
+        public Crc32cLayer() : base(CRC32C.ChecksumSize)
+        {
+
+        }
+
+        public override void ProcessInboundPacket(ref byte[] data, ref int length)
+        {
+            if (length < NetConstants.HeaderSize + CRC32C.ChecksumSize)
+            {
+                NetDebug.WriteError("[NM] DataReceived size: bad!");
+                return;
+            }
+
+            int checksumPoint = length - CRC32C.ChecksumSize;
+            if (CRC32C.Compute(data, 0, checksumPoint) != BitConverter.ToUInt32(data, checksumPoint))
+            {
+                NetDebug.Write("[NM] DataReceived checksum: bad!");
+                return;
+            }
+            length -= CRC32C.ChecksumSize;
+        }
+
+        public override void ProcessOutBoundPacket(ref byte[] data, ref int offset, ref int length)
+        {
+            FastBitConverter.GetBytes(data, length, CRC32C.Compute(data, offset, length));
+            length += CRC32C.ChecksumSize;
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/Crc32cLayer.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/PacketLayerBase.cs

+namespace LiteNetLib.Layers
+{
+    public abstract class PacketLayerBase
+    {
+        public readonly int ExtraPacketSizeForLayer;
+
+        protected PacketLayerBase(int extraPacketSizeForLayer)
+        {
+            ExtraPacketSizeForLayer = extraPacketSizeForLayer;
+        }
+
+        public abstract void ProcessInboundPacket(ref byte[] data, ref int length);
+        public abstract void ProcessOutBoundPacket(ref byte[] data, ref int offset, ref int length);
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/PacketLayerBase.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/XorEncryptLayer.cs

+using System;
+using System.Text;
+
+namespace LiteNetLib.Layers
+{
+    public class XorEncryptLayer : PacketLayerBase
+    {
+        private byte[] _byteKey;
+
+        public XorEncryptLayer() : base(0)
+        {
+
+        }
+
+        public XorEncryptLayer(byte[] key) : this()
+        {
+            SetKey(key);
+        }
+
+        public XorEncryptLayer(string key) : this()
+        {
+            SetKey(key);
+        }
+
+        public void SetKey(string key)
+        {
+            _byteKey = Encoding.UTF8.GetBytes(key);
+        }
+
+        public void SetKey(byte[] key)
+        {
+            if (_byteKey == null || _byteKey.Length != key.Length)
+                _byteKey = new byte[key.Length];
+            Buffer.BlockCopy(key, 0, _byteKey, 0, key.Length);
+        }
+
+        public override void ProcessInboundPacket(ref byte[] data, ref int length)
+        {
+            if (_byteKey == null)
+                return;
+            for (var i = 0; i < length; i++)
+            {
+                var offset = i % _byteKey.Length;
+                data[i] = (byte)(data[i] ^ _byteKey[offset]);
+            }
+        }
+
+        public override void ProcessOutBoundPacket(ref byte[] data, ref int offset, ref int length)
+        {
+            if (_byteKey == null)
+                return;
+            var cur = offset;
+            for (var i = 0; i < length; i++, cur++)
+            {
+                data[cur] = (byte)(data[cur] ^ _byteKey[i % _byteKey.Length]);
+            }
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/Layers/XorEncryptLayer.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/LiteNetLib.csproj.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NatPunchModule.cs

+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using LiteNetLib.Utils;
+
+namespace LiteNetLib
+{
+    public enum NatAddressType
+    {
+        Internal,
+        External
+    }
+
+    public interface INatPunchListener
+    {
+        void OnNatIntroductionRequest(IPEndPoint localEndPoint, IPEndPoint remoteEndPoint, string token);
+        void OnNatIntroductionSuccess(IPEndPoint targetEndPoint, NatAddressType type, string token);
+    }
+
+    public class EventBasedNatPunchListener : INatPunchListener
+    {
+        public delegate void OnNatIntroductionRequest(IPEndPoint localEndPoint, IPEndPoint remoteEndPoint, string token);
+        public delegate void OnNatIntroductionSuccess(IPEndPoint targetEndPoint, NatAddressType type, string token);
+
+        public event OnNatIntroductionRequest NatIntroductionRequest;
+        public event OnNatIntroductionSuccess NatIntroductionSuccess;
+
+        void INatPunchListener.OnNatIntroductionRequest(IPEndPoint localEndPoint, IPEndPoint remoteEndPoint, string token)
+        {
+            if(NatIntroductionRequest != null)
+                NatIntroductionRequest(localEndPoint, remoteEndPoint, token);
+        }
+
+        void INatPunchListener.OnNatIntroductionSuccess(IPEndPoint targetEndPoint, NatAddressType type, string token)
+        {
+            if (NatIntroductionSuccess != null)
+                NatIntroductionSuccess(targetEndPoint, type, token);
+        }
+    }
+
+    /// <summary>
+    /// Module for UDP NAT Hole punching operations. Can be accessed from NetManager
+    /// </summary>
+    public sealed class NatPunchModule
+    {
+        struct RequestEventData
+        {
+            public IPEndPoint LocalEndPoint;
+            public IPEndPoint RemoteEndPoint;
+            public string Token;
+        }
+
+        struct SuccessEventData
+        {
+            public IPEndPoint TargetEndPoint;
+            public NatAddressType Type;
+            public string Token;
+        }
+
+        class NatIntroduceRequestPacket
+        {
+            public IPEndPoint Internal { get; set; }
+            public string Token { get; set; }
+        }
+
+        class NatIntroduceResponsePacket
+        {
+            public IPEndPoint Internal { get; set; }
+            public IPEndPoint External { get; set; }
+            public string Token { get; set; }
+        }
+
+        class NatPunchPacket
+        {
+            public string Token { get; set; }
+            public bool IsExternal { get; set; }
+        }
+
+        private readonly NetSocket _socket;
+        private readonly Queue<RequestEventData> _requestEvents = new Queue<RequestEventData>();
+        private readonly Queue<SuccessEventData> _successEvents = new Queue<SuccessEventData>();
+        private readonly NetDataReader _cacheReader = new NetDataReader();
+        private readonly NetDataWriter _cacheWriter = new NetDataWriter();
+        private readonly NetPacketProcessor _netPacketProcessor = new NetPacketProcessor(MaxTokenLength);
+        private INatPunchListener _natPunchListener;
+        public const int MaxTokenLength = 256;
+
+        internal NatPunchModule(NetSocket socket)
+        {
+            _socket = socket;
+            _netPacketProcessor.SubscribeReusable<NatIntroduceResponsePacket>(OnNatIntroductionResponse);
+            _netPacketProcessor.SubscribeReusable<NatIntroduceRequestPacket, IPEndPoint>(OnNatIntroductionRequest);
+            _netPacketProcessor.SubscribeReusable<NatPunchPacket, IPEndPoint>(OnNatPunch);
+        }
+
+        internal void ProcessMessage(IPEndPoint senderEndPoint, NetPacket packet)
+        {
+            lock (_cacheReader)
+            {
+                _cacheReader.SetSource(packet.RawData, NetConstants.HeaderSize, packet.Size);
+                _netPacketProcessor.ReadAllPackets(_cacheReader, senderEndPoint);
+            }
+        }
+
+        public void Init(INatPunchListener listener)
+        {
+            _natPunchListener = listener;
+        }
+
+        private void Send<T>(T packet, IPEndPoint target) where T : class, new()
+        {
+            SocketError errorCode = 0;
+            _cacheWriter.Reset();
+            _cacheWriter.Put((byte)PacketProperty.NatMessage);
+            _netPacketProcessor.Write(_cacheWriter, packet);
+            _socket.SendTo(_cacheWriter.Data, 0, _cacheWriter.Length, target, ref errorCode);
+        }
+
+        public void NatIntroduce(
+            IPEndPoint hostInternal,
+            IPEndPoint hostExternal,
+            IPEndPoint clientInternal,
+            IPEndPoint clientExternal,
+            string additionalInfo)
+        {
+            var req = new NatIntroduceResponsePacket
+            {
+                Token = additionalInfo
+            };
+
+            //First packet (server) send to client
+            req.Internal = hostInternal;
+            req.External = hostExternal;
+            Send(req, clientExternal);
+
+            //Second packet (client) send to server
+            req.Internal = clientInternal;
+            req.External = clientExternal;
+            Send(req, hostExternal);
+        }
+
+        public void PollEvents()
+        {
+            if (_natPunchListener == null || (_successEvents.Count == 0 && _requestEvents.Count == 0))
+                return;
+            lock (_successEvents)
+            {
+                while (_successEvents.Count > 0)
+                {
+                    var evt = _successEvents.Dequeue();
+                    _natPunchListener.OnNatIntroductionSuccess(
+                        evt.TargetEndPoint, 
+                        evt.Type,
+                        evt.Token);
+                }
+            }
+            lock (_requestEvents)
+            {
+                while (_requestEvents.Count > 0)
+                {
+                    var evt = _requestEvents.Dequeue();
+                    _natPunchListener.OnNatIntroductionRequest(evt.LocalEndPoint, evt.RemoteEndPoint, evt.Token);
+                }
+            }
+        }
+
+        public void SendNatIntroduceRequest(string host, int port, string additionalInfo)
+        {
+            SendNatIntroduceRequest(NetUtils.MakeEndPoint(host, port), additionalInfo);
+        }
+
+        public void SendNatIntroduceRequest(IPEndPoint masterServerEndPoint, string additionalInfo)
+        {
+            //prepare outgoing data
+            string networkIp = NetUtils.GetLocalIp(LocalAddrType.IPv4);
+            if (string.IsNullOrEmpty(networkIp))
+            {
+                networkIp = NetUtils.GetLocalIp(LocalAddrType.IPv6);
+            }
+
+            Send(
+                new NatIntroduceRequestPacket
+                {
+                    Internal = NetUtils.MakeEndPoint(networkIp, _socket.LocalPort),
+                    Token = additionalInfo
+                }, 
+                masterServerEndPoint);
+        }
+
+        //We got request and must introduce
+        private void OnNatIntroductionRequest(NatIntroduceRequestPacket req, IPEndPoint senderEndPoint)
+        {
+            lock (_requestEvents)
+            {
+                _requestEvents.Enqueue(new RequestEventData
+                {
+                    LocalEndPoint = req.Internal,
+                    RemoteEndPoint = senderEndPoint,
+                    Token = req.Token
+                });
+            }
+        }
+
+        //We got introduce and must punch
+        private void OnNatIntroductionResponse(NatIntroduceResponsePacket req)
+        {
+            NetDebug.Write(NetLogLevel.Trace, "[NAT] introduction received");
+
+            // send internal punch
+            var punchPacket = new NatPunchPacket {Token = req.Token};
+            Send(punchPacket, req.Internal);
+            NetDebug.Write(NetLogLevel.Trace, "[NAT] internal punch sent to " + req.Internal);
+
+            // hack for some routers
+            SocketError errorCode = 0;
+            _socket.Ttl = 2;
+            _socket.SendTo(new[] { (byte)PacketProperty.Empty }, 0, 1, req.External, ref errorCode);
+
+            // send external punch
+            _socket.Ttl = NetConstants.SocketTTL;
+            punchPacket.IsExternal = true;
+            Send(punchPacket, req.External);
+            NetDebug.Write(NetLogLevel.Trace, "[NAT] external punch sent to " + req.External);
+        }
+
+        //We got punch and can connect
+        private void OnNatPunch(NatPunchPacket req, IPEndPoint senderEndPoint)
+        {
+            //Read info
+            NetDebug.Write(NetLogLevel.Trace, "[NAT] punch received from {0} - additional info: {1}",
+                senderEndPoint, req.Token);
+
+            //Release punch success to client; enabling him to Connect() to Sender if token is ok
+            lock (_successEvents)
+            {
+                _successEvents.Enqueue(new SuccessEventData
+                {
+                    TargetEndPoint = senderEndPoint,
+                    Type = req.IsExternal ? NatAddressType.External : NatAddressType.Internal, 
+                    Token = req.Token
+                });
+            }
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NatPunchModule.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetConstants.cs

+namespace LiteNetLib
+{
+    /// <summary>
+    /// Sending method type
+    /// </summary>
+    public enum DeliveryMethod : byte
+    {
+        /// <summary>
+        /// Unreliable. Packets can be dropped, can be duplicated, can arrive without order.
+        /// </summary>
+        Unreliable = 4,
+
+        /// <summary>
+        /// Reliable. Packets won't be dropped, won't be duplicated, can arrive without order.
+        /// </summary>
+        ReliableUnordered = 0,
+
+        /// <summary>
+        /// Unreliable. Packets can be dropped, won't be duplicated, will arrive in order.
+        /// </summary>
+        Sequenced = 1,
+
+        /// <summary>
+        /// Reliable and ordered. Packets won't be dropped, won't be duplicated, will arrive in order.
+        /// </summary>
+        ReliableOrdered = 2,
+
+        /// <summary>
+        /// Reliable only last packet. Packets can be dropped (except the last one), won't be duplicated, will arrive in order.
+        /// </summary>
+        ReliableSequenced = 3
+    }
+
+    /// <summary>
+    /// Network constants. Can be tuned from sources for your purposes.
+    /// </summary>
+    public static class NetConstants
+    {
+        //can be tuned
+        public const int DefaultWindowSize = 64;
+        public const int SocketBufferSize = 1024 * 1024; //1mb
+        public const int SocketTTL = 255;
+
+        public const int HeaderSize = 1;
+        public const int ChanneledHeaderSize = 4;
+        public const int FragmentHeaderSize = 6;
+        public const int FragmentedHeaderTotalSize = ChanneledHeaderSize + FragmentHeaderSize;
+        public const ushort MaxSequence = 32768;
+        public const ushort HalfMaxSequence = MaxSequence / 2;
+
+        //protocol
+        internal const int ProtocolId = 11;
+        internal const int MaxUdpHeaderSize = 68;
+
+        internal static readonly int[] PossibleMtu =
+        {
+            576  - MaxUdpHeaderSize, //minimal
+            1232 - MaxUdpHeaderSize,
+            1460 - MaxUdpHeaderSize, //google cloud
+            1472 - MaxUdpHeaderSize, //VPN
+            1492 - MaxUdpHeaderSize, //Ethernet with LLC and SNAP, PPPoE (RFC 1042)
+            1500 - MaxUdpHeaderSize  //Ethernet II (RFC 1191)
+        };
+
+        internal static readonly int MaxPacketSize = PossibleMtu[PossibleMtu.Length - 1];
+
+        //peer specific
+        public const byte MaxConnectionNumber = 4;
+
+        public const int PacketPoolSize = 1000;
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetConstants.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetDebug.cs

+using System;
+using System.Diagnostics;
+
+namespace LiteNetLib
+{
+    public class InvalidPacketException : ArgumentException
+    {
+        public InvalidPacketException(string message) : base(message)
+        {
+        }
+    }
+
+    public class TooBigPacketException : InvalidPacketException
+    {
+        public TooBigPacketException(string message) : base(message)
+        {
+        }
+    }
+
+    public enum NetLogLevel
+    {
+        Warning,
+        Error,
+        Trace,
+        Info
+    }
+
+    /// <summary>
+    /// Interface to implement for your own logger
+    /// </summary>
+    public interface INetLogger
+    {
+        void WriteNet(NetLogLevel level, string str, params object[] args);
+    }
+
+    /// <summary>
+    /// Static class for defining your own LiteNetLib logger instead of Console.WriteLine
+    /// or Debug.Log if compiled with UNITY flag
+    /// </summary>
+    public static class NetDebug
+    {
+        public static INetLogger Logger = null;
+        private static readonly object DebugLogLock = new object();
+        private static void WriteLogic(NetLogLevel logLevel, string str, params object[] args)
+        {
+            lock (DebugLogLock)
+            {
+                if (Logger == null)
+                {
+#if UNITY_4 || UNITY_5 || UNITY_5_3_OR_NEWER
+                    UnityEngine.Debug.Log(string.Format(str, args));
+#else
+                    Console.WriteLine(str, args);
+#endif
+                }
+                else
+                {
+                    Logger.WriteNet(logLevel, str, args);
+                }
+            }
+        }
+
+        [Conditional("DEBUG_MESSAGES")]
+        internal static void Write(string str, params object[] args)
+        {
+            WriteLogic(NetLogLevel.Trace, str, args);
+        }
+
+        [Conditional("DEBUG_MESSAGES")]
+        internal static void Write(NetLogLevel level, string str, params object[] args)
+        {
+            WriteLogic(level, str, args);
+        }
+
+        [Conditional("DEBUG_MESSAGES"), Conditional("DEBUG")]
+        internal static void WriteForce(string str, params object[] args)
+        {
+            WriteLogic(NetLogLevel.Trace, str, args);
+        }
+
+        [Conditional("DEBUG_MESSAGES"), Conditional("DEBUG")]
+        internal static void WriteForce(NetLogLevel level, string str, params object[] args)
+        {
+            WriteLogic(level, str, args);
+        }
+
+        internal static void WriteError(string str, params object[] args)
+        {
+            WriteLogic(NetLogLevel.Error, str, args);
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetDebug.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetManager.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetPacket.cs

+using System;
+using System.Net;
+using LiteNetLib.Utils;
+
+namespace LiteNetLib
+{
+    internal enum PacketProperty : byte
+    {
+        Unreliable,
+        Channeled,
+        Ack,
+        Ping,
+        Pong,
+        ConnectRequest,
+        ConnectAccept,
+        Disconnect,
+        UnconnectedMessage,
+        MtuCheck,
+        MtuOk,
+        Broadcast,
+        Merged,
+        ShutdownOk,
+        PeerNotFound,
+        InvalidProtocol,
+        NatMessage,
+        Empty
+    }
+
+    internal sealed class NetPacket
+    {
+        private static readonly int LastProperty = Enum.GetValues(typeof(PacketProperty)).Length;
+        private static readonly int[] HeaderSizes;
+
+        static NetPacket()
+        {
+            HeaderSizes = new int[LastProperty+1];
+            for (int i = 0; i < HeaderSizes.Length; i++)
+            {
+                switch ((PacketProperty)i)
+                {
+                    case PacketProperty.Channeled:
+                    case PacketProperty.Ack:
+                        HeaderSizes[i] = NetConstants.ChanneledHeaderSize;
+                        break;
+                    case PacketProperty.Ping:
+                        HeaderSizes[i] = NetConstants.HeaderSize + 2;
+                        break;
+                    case PacketProperty.ConnectRequest:
+                        HeaderSizes[i] = NetConnectRequestPacket.HeaderSize;
+                        break;
+                    case PacketProperty.ConnectAccept:
+                        HeaderSizes[i] = NetConnectAcceptPacket.Size;
+                        break;
+                    case PacketProperty.Disconnect:
+                        HeaderSizes[i] = NetConstants.HeaderSize + 8;
+                        break;
+                    case PacketProperty.Pong:
+                        HeaderSizes[i] = NetConstants.HeaderSize + 10;
+                        break;
+                    default:
+                        HeaderSizes[i] = NetConstants.HeaderSize;
+                        break;
+                }
+            }
+        }
+
+        //Header
+        public PacketProperty Property
+        {
+            get { return (PacketProperty)(RawData[0] & 0x1F); }
+            set { RawData[0] = (byte)((RawData[0] & 0xE0) | (byte)value); }
+        }
+
+        public byte ConnectionNumber
+        {
+            get { return (byte)((RawData[0] & 0x60) >> 5); }
+            set { RawData[0] = (byte) ((RawData[0] & 0x9F) | (value << 5)); }
+        }
+
+        public ushort Sequence
+        {
+            get { return BitConverter.ToUInt16(RawData, 1); }
+            set { FastBitConverter.GetBytes(RawData, 1, value); }
+        }
+
+        public bool IsFragmented
+        {
+            get { return (RawData[0] & 0x80) != 0; }
+        }
+
+        public void MarkFragmented()
+        {
+            RawData[0] |= 0x80; //set first bit
+        }
+
+        public byte ChannelId
+        {
+            get { return RawData[3]; }
+            set { RawData[3] = value; }
+        }
+
+        public ushort FragmentId
+        {
+            get { return BitConverter.ToUInt16(RawData, 4); }
+            set { FastBitConverter.GetBytes(RawData, 4, value); }
+        }
+
+        public ushort FragmentPart
+        {
+            get { return BitConverter.ToUInt16(RawData, 6); }
+            set { FastBitConverter.GetBytes(RawData, 6, value); }
+        }
+
+        public ushort FragmentsTotal
+        {
+            get { return BitConverter.ToUInt16(RawData, 8); }
+            set { FastBitConverter.GetBytes(RawData, 8, value); }
+        }
+
+        //Data
+        public byte[] RawData;
+        public int Size;
+
+        //Delivery
+        public object UserData;
+
+        //Pool node
+        public NetPacket Next;
+
+        public NetPacket(int size)
+        {
+            RawData = new byte[size];
+            Size = size;
+        }
+
+        public NetPacket(PacketProperty property, int size)
+        {
+            size += GetHeaderSize(property);
+            RawData = new byte[size];
+            Property = property;
+            Size = size;
+        }
+
+        public static int GetHeaderSize(PacketProperty property)
+        {
+            return HeaderSizes[(int)property];
+        }
+
+        public int GetHeaderSize()
+        {
+            return HeaderSizes[RawData[0] & 0x1F];
+        }
+
+        //Packet constructor from byte array
+        public bool FromBytes(byte[] data, int start, int packetSize)
+        {
+            //Reading property
+            byte property = (byte)(data[start] & 0x1F);
+            bool fragmented = (data[start] & 0x80) != 0;
+            int headerSize = HeaderSizes[property];
+
+            if (property > LastProperty || packetSize < headerSize ||
+               (fragmented && packetSize < headerSize + NetConstants.FragmentHeaderSize) ||
+               data.Length < start + packetSize)
+            {
+                return false;
+            }
+
+            Buffer.BlockCopy(data, start, RawData, 0, packetSize);
+            Size = (ushort)packetSize;
+            return true;
+        }
+    }
+
+    internal sealed class NetConnectRequestPacket
+    {
+        public const int HeaderSize = 14;
+        public readonly long ConnectionTime;
+        public readonly byte ConnectionNumber;
+        public readonly byte[] TargetAddress;
+        public readonly NetDataReader Data;
+
+        private NetConnectRequestPacket(long connectionTime, byte connectionNumber, byte[] targetAddress, NetDataReader data)
+        {
+            ConnectionTime = connectionTime;
+            ConnectionNumber = connectionNumber;
+            TargetAddress = targetAddress;
+            Data = data;
+        }
+
+        public static int GetProtocolId(NetPacket packet)
+        {
+            return BitConverter.ToInt32(packet.RawData, 1);
+        }
+        
+        public static NetConnectRequestPacket FromData(NetPacket packet)
+        {
+            if (packet.ConnectionNumber >= NetConstants.MaxConnectionNumber)
+                return null;
+
+            //Getting new id for peer
+            long connectionId = BitConverter.ToInt64(packet.RawData, 5);
+            
+            //Get target address
+            int addrSize = packet.RawData[13];
+            if (addrSize != 16 && addrSize != 28)
+                return null;
+            byte[] addressBytes = new byte[addrSize];
+            Buffer.BlockCopy(packet.RawData, 14, addressBytes, 0, addrSize);
+
+            // Read data and create request
+            var reader = new NetDataReader(null, 0, 0);
+            if (packet.Size > HeaderSize+addrSize)
+                reader.SetSource(packet.RawData, HeaderSize + addrSize, packet.Size);
+
+            return new NetConnectRequestPacket(connectionId, packet.ConnectionNumber, addressBytes, reader);
+        }
+
+        public static NetPacket Make(NetDataWriter connectData, SocketAddress addressBytes, long connectId)
+        {
+            //Make initial packet
+            var packet = new NetPacket(PacketProperty.ConnectRequest, connectData.Length+addressBytes.Size);
+
+            //Add data
+            FastBitConverter.GetBytes(packet.RawData, 1, NetConstants.ProtocolId);
+            FastBitConverter.GetBytes(packet.RawData, 5, connectId);
+            packet.RawData[13] = (byte)addressBytes.Size;
+            for (int i = 0; i < addressBytes.Size; i++)
+                packet.RawData[14+i] = addressBytes[i];
+            Buffer.BlockCopy(connectData.Data, 0, packet.RawData, 14+addressBytes.Size, connectData.Length);
+            return packet;
+        }
+    }
+
+    internal sealed class NetConnectAcceptPacket
+    {
+        public const int Size = 11;
+        public readonly long ConnectionId;
+        public readonly byte ConnectionNumber;
+        public readonly bool IsReusedPeer;
+
+        private NetConnectAcceptPacket(long connectionId, byte connectionNumber, bool isReusedPeer)
+        {
+            ConnectionId = connectionId;
+            ConnectionNumber = connectionNumber;
+            IsReusedPeer = isReusedPeer;
+        }
+
+        public static NetConnectAcceptPacket FromData(NetPacket packet)
+        {
+            if (packet.Size > Size)
+                return null;
+
+            long connectionId = BitConverter.ToInt64(packet.RawData, 1);
+            //check connect num
+            byte connectionNumber = packet.RawData[9];
+            if (connectionNumber >= NetConstants.MaxConnectionNumber)
+                return null;
+            //check reused flag
+            byte isReused = packet.RawData[10];
+            if (isReused > 1)
+                return null;
+
+            return new NetConnectAcceptPacket(connectionId, connectionNumber, isReused == 1);
+        }
+
+        public static NetPacket Make(long connectId, byte connectNum, bool reusedPeer)
+        {
+            var packet = new NetPacket(PacketProperty.ConnectAccept, 0);
+            FastBitConverter.GetBytes(packet.RawData, 1, connectId);
+            packet.RawData[9] = connectNum;
+            packet.RawData[10] = (byte)(reusedPeer ? 1 : 0);
+            return packet;
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetPacket.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetPacketPool.cs

+using System;
+using System.Threading;
+
+namespace LiteNetLib
+{
+    internal sealed class NetPacketPool
+    {
+        private NetPacket _head;
+        private int _count;
+
+        public NetPacket GetWithData(PacketProperty property, byte[] data, int start, int length)
+        {
+            int headerSize = NetPacket.GetHeaderSize(property);
+            NetPacket packet = GetPacket(length + headerSize);
+            packet.Property = property;
+            Buffer.BlockCopy(data, start, packet.RawData, headerSize, length);
+            return packet;
+        }
+
+        //Get packet with size
+        public NetPacket GetWithProperty(PacketProperty property, int size)
+        {
+            NetPacket packet = GetPacket(size + NetPacket.GetHeaderSize(property));
+            packet.Property = property;
+            return packet;
+        }
+
+        public NetPacket GetWithProperty(PacketProperty property)
+        {
+            NetPacket packet = GetPacket(NetPacket.GetHeaderSize(property));
+            packet.Property = property;
+            return packet;
+        }
+
+        public NetPacket GetPacket(int size)
+        {
+            if (size > NetConstants.MaxPacketSize) 
+                return new NetPacket(size);
+
+            NetPacket packet;
+            do
+            {
+                packet = _head;
+                if (packet == null)
+                    return new NetPacket(size);
+            } while (packet != Interlocked.CompareExchange(ref _head, packet.Next, packet));
+
+            _count--;
+            packet.Size = size;
+            if (packet.RawData.Length < size)
+                packet.RawData = new byte[size];
+            return packet;
+        }
+
+        public void Recycle(NetPacket packet)
+        {
+            if (packet.RawData.Length > NetConstants.MaxPacketSize || _count >= NetConstants.PacketPoolSize)
+            {
+                //Don't pool big packets. Save memory
+                return;
+            }
+
+            _count++;
+
+            //Clean fragmented flag
+            packet.RawData[0] = 0;
+
+            do
+            {
+                packet.Next = _head;
+            } while (packet.Next != Interlocked.CompareExchange(ref _head, packet, packet.Next));
+        }
+    }
+}

Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetPacketPool.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetPeer.cs.meta

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Packages/com.unity.multiplayer.transport.litenet/Runtime/LiteNetLib/NetSocket.cs

+#if UNITY_5_3_OR_NEWER
+#define UNITY
+#if UNITY_IOS && !UNITY_EDITOR
+using UnityEngine;
+#endif
+#endif
+#if NETSTANDARD || NETCOREAPP
+using System.Runtime.InteropServices;
+#endif
+
+using System;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+
+namespace LiteNetLib
+{
+#if UNITY_IOS && !UNITY_EDITOR
+    public class UnitySocketFix : MonoBehaviour
+    {
+        internal IPAddress BindAddrIPv4;
+        internal IPAddress BindAddrIPv6;
+        internal bool Reuse;
+        internal IPv6Mode IPv6;
+        internal int Port;
+        internal bool Paused;
+        internal NetSocket Socket;
+
+        private void Update()
+        {
+            if (Socket == null)
+                Destroy(gameObject);
+        }
+
+        private void OnApplicationPause(bool pause)
+        {
+            if (Socket == null)