Added serial port support

- complete restructure of codebase

MewtocolNet/MewtocolInterfaceTcp.cs

@@ -0,0 +1,164 @@
+using MewtocolNet.Exceptions;
+using MewtocolNet.Logging;
+using MewtocolNet.Queue;
+using MewtocolNet.RegisterAttributes;
+using MewtocolNet.Registers;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.Design;
+using System.Diagnostics;
+using System.IO;
+using System.IO.Ports;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace MewtocolNet {
+
+    /// <summary>
+    /// The PLC com interface class
+    /// </summary>
+    public class MewtocolInterfaceTcp : MewtocolInterface, IPlcEthernet {
+
+        /// <summary>
+        /// The host ip endpoint, leave it null to use an automatic interface
+        /// </summary>
+        public IPEndPoint HostEndpoint { get; set; }
+
+        //TCP
+        internal TcpClient client;
+
+        //tcp/ip config
+        private string ip;
+        private int port;
+
+        /// <inheritdoc/>
+        public string IpAddress => ip;
+
+        /// <inheritdoc/>
+        public int Port => port;
+
+        internal MewtocolInterfaceTcp () : base() { }
+
+        /// <inheritdoc/>
+        public IPlcEthernet WithPoller () {
+
+            usePoller = true;   
+            return this;
+       
+        }
+
+        #region TCP connection state handling
+
+        /// <inheritdoc/>
+        public void ConfigureConnection (string _ip, int _port = 9094, int _station = 1) {
+
+            ip = _ip;
+            port = _port;
+            stationNumber = _station;
+
+            Disconnect();
+
+        }
+
+        /// <inheritdoc/>
+        public override async Task ConnectAsync () {
+
+            if (!IPAddress.TryParse(ip, out var targetIP)) {
+                throw new ArgumentException("The IP adress of the PLC was no valid format");
+            }
+
+            try {
+
+                if (HostEndpoint != null) {
+
+                    client = new TcpClient(HostEndpoint) {
+                        ReceiveBufferSize = RecBufferSize,
+                        NoDelay = false,
+                    };
+                    var ep = (IPEndPoint)client.Client.LocalEndPoint;
+                    Logger.Log($"Connecting [MAN] endpoint: {ep.Address}:{ep.Port}", LogLevel.Verbose, this);
+
+                } else {
+
+                    client = new TcpClient() {
+                        ReceiveBufferSize = RecBufferSize,
+                        NoDelay = false,
+                        ExclusiveAddressUse = true,
+                    };
+
+                }
+
+                var result = client.BeginConnect(targetIP, port, null, null);
+                var success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromMilliseconds(ConnectTimeout));
+
+                if (!success || !client.Connected) {
+                    OnMajorSocketExceptionWhileConnecting();
+                    return;
+                }
+
+                if (HostEndpoint == null) {
+                    var ep = (IPEndPoint)client.Client.LocalEndPoint;
+                    Logger.Log($"Connecting [AUTO] endpoint: {ep.Address.MapToIPv4()}:{ep.Port}", LogLevel.Verbose, this);
+                }
+
+                //get the stream
+                stream = client.GetStream();
+                stream.ReadTimeout = 1000;
+
+                //get plc info
+                var plcinf = await GetPLCInfoAsync();
+
+                if (plcinf != null) {
+
+                    OnConnected(plcinf);
+
+                } else {
+
+                    Logger.Log("Initial connection failed", LogLevel.Info, this);
+                    OnDisconnect();
+
+                }
+
+                await Task.CompletedTask;
+
+            } catch (SocketException) {
+
+                OnMajorSocketExceptionWhileConnecting();
+
+            }
+
+        }
+
+        /// <summary>
+        /// Gets the connection info string
+        /// </summary>
+        public override string GetConnectionInfo() {
+
+            return $"{IpAddress}:{Port}";
+
+        }
+
+        private protected override void OnDisconnect() {
+
+            if (IsConnected) {
+
+                base.OnDisconnect();
+
+                client.Close();
+
+            }
+
+        }
+
+        #endregion
+
+    }
+
+}