using System; using System.Collections.Generic; using System.Text; using System.Net.Sockets; using System.Net; using System.Threading; using System.Security.Cryptography; using System.IO; using System.Diagnostics; namespace TCPServerService { public class UdpMulticast { private Socket s; private Thread listenThread; private string mcastGroup; private int port; private bool working = false; private bool useThreadPool = false; private string localIP = null; public UdpMulticast(string mcastGroup, int port) { this.mcastGroup = mcastGroup; this.port = port; } private void Listen_pool(object a) { Listen(); } private void Listen() { while (working) { try { int recv = 0; ; byte[] b = new byte[2048]; Thread.Sleep(1); if (s != null) recv = s.Receive(b); else break;//break if socket == null if (recv == 0) continue;//continue if return nr bytes == 0 if (OnNewDataRecv != null) { byte[] tmp = new byte[recv]; for (int i = 0; i < recv; i++) { tmp[i] = b[i]; } byte[] decByte = Encryption.Decrypt(tmp); if (this.OnNewDataRecv != null) this.OnNewDataRecv(decByte, decByte.Length); } if (s == null) { break; } } catch (SocketException ex) { Utils.WriteEventLog(Program.COMPANY, "UdpMulticast Listen SOCKET EXCEPTION " + ex.ToString(), EventLogEntryType.Error, 23456); //StartListen(localIP); break; } catch (ThreadAbortException ex) { Utils.WriteEventLog(Program.COMPANY, "UdpMulticast Listen Thread Abort EXCEPTION " + ex.ToString(), EventLogEntryType.Error, 23456); //StartListen(localIP); break; } catch (Exception ex) { Utils.WriteEventLog(Program.COMPANY, "UdpMulticast Listen Exception" + ex.ToString(), EventLogEntryType.Error, 23456); //StartListen(localIP); } } } public delegate void newData4Send(byte[] data, int dataLen); public event newData4Send OnNewDataRecv; public bool StartListen(string localIP = null) { bool ret = false; working = true; this.localIP = localIP; IPAddress myIP = !string.IsNullOrWhiteSpace(localIP) ? IPAddress.Parse(localIP) : getPreferedIPAdress(); try { try { if (s != null) { s.Close(); s.Disconnect(false); } } catch(Exception ex) { Utils.WriteEventLog(Program.COMPANY, "StartListen multicast error:" + ex.ToString(), EventLogEntryType.Error, 34500); } if (s == null) { s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); } if (s != null) { Utils.WriteEventLog(Program.COMPANY, "PORT multi cast :" + port, EventLogEntryType.Information, 34500); IPEndPoint ipep = new IPEndPoint(IPAddress.Any, port); s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1); s.Bind(ipep); IPAddress ip = IPAddress.Parse(mcastGroup); s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ip, IPAddress.Any)); s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, int.Parse("1")); listenThread = new Thread(new ThreadStart(Listen)); listenThread.IsBackground = true; } if (listenThread != null) listenThread.Start(); ret = true; Utils.WriteEventLog("Safemobile", $"++++++++++++++++++++++++++++++++++++++++++\nUdpMulticast bind on {mcastGroup}:{port} Ethernet: {myIP}\n++++++++++++++++++++++++++++++++++++++++++", EventLogEntryType.Information, 23456); } catch (Exception ex) { Utils.WriteEventLog(Program.COMPANY, "Ex:" + ex.ToString(), EventLogEntryType.Error, 23456); } return ret; } public static IPAddress getPreferedIPAdress() { IPAddress localIP = IPAddress.Parse("127.0.0.1"); Socket socket = null; try { using (socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0)) { socket.Connect("10.0.2.4", 65530); IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint; localIP = endPoint.Address; } } catch (Exception ex) { Utils.WriteLine(ex.ToString(), ConsoleColor.DarkRed); } finally { if (socket != null) socket.Dispose(); } return localIP; } public void Send(byte[] data, int len) { if (s == null) { s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); } if (s != null) { IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(mcastGroup), port); byte[] encByte = Encryption.Encrypt(data); s.SendTo(encByte, encByte.Length, SocketFlags.None, ipep); } else Utils.WriteEventLog(Program.COMPANY, "s is NULL", EventLogEntryType.Error, 23456); } public void Send_decoded(byte[] data, int len) { if (s == null) { s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); } if (s != null) { IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(mcastGroup), port); s.SendTo(data, data.Length, SocketFlags.None, ipep); } else Utils.WriteEventLog(Program.COMPANY, "s is NULL", EventLogEntryType.Error, 23456); } } static public class Encryption { static byte[] bytes = ASCIIEncoding.ASCII.GetBytes("SafeMobi"); //DES 64bit ! static public byte[] Encrypt(byte[] inputArray) { DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); MemoryStream memoryStream = new MemoryStream(); CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateEncryptor(bytes, bytes), CryptoStreamMode.Write); cryptoStream.Write(inputArray, 0, inputArray.Length); cryptoStream.Close(); memoryStream.Close(); return memoryStream.ToArray(); } static public byte[] Decrypt(byte[] DataToDecrypt) { DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider(); MemoryStream memoryStream = new MemoryStream(); CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoProvider.CreateDecryptor(bytes, bytes), CryptoStreamMode.Write); cryptoStream.Write(DataToDecrypt, 0, DataToDecrypt.Length); cryptoStream.Close(); memoryStream.Close(); return memoryStream.ToArray(); } } }