03장 C# Socket 활용

Server Socket 작성하기

using System; using System.Net.Sockets; using System.Net using System.Text; public class SocketServer{                                          public static void Main (string [] args) {  IPHostEntry ipHost = Dns.Resolve("localhost"); IPAddress ipAddr = ipHost.AddressList[0]; IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 11000); Socket sListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); try {        sListener.Bind(ipEndPoint);        sListener.Listen(10);               while (true) {                     Console.WriteLine("Waiting for a connection on port {0}",ipEndPoint);                      Clientsoket handler = sListener.Accept();                     string data = null;         while(true) {                            byte[] bytes = new byte[1024];                            int bytesRec = handler.Receive(bytes);                            data += Encoding.ASCII.GetString(bytes,0,bytesRec);                            if (data.IndexOf("") > -1)                            {                               break;                            }          } Console.WriteLine("Text Received: {0}",data); string theReply = "Thank you for those " + data.Length.ToString() + " characters..."; byte[] msg = Encoding.ASCII.GetBytes(theReply); handler.Send(msg); handler.Shutdown(SocketShutdown.Both); handler.Close(); } catch(Exception e) {                              Console.WriteLine(e.ToString()); } }  }

Client Socket 작성하기

using System; using System.Net.Sockets; using System.Net; using System.Text; public class SocketClient{                         public static void Main (string [] args)                         {                             byte[] bytes = new byte[1024];                            try{                                 IPHostEntry ipHost = Dns.Resolve("127.0.0.1");                                 IPAddress ipAddr = ipHost.AddressList[0];                                 IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 11000);                                 Socket sender = new Socket                             (AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp);                                   sender.Connect(ipEndPoint);                                    Console.WriteLine("Socket connected to {0}",                                                               sender.RemoteEndPoint.ToString());                                                                string theMessage;                                  if (args.Length==0)                                          theMessage = "This is a test";                                   else                                          theMessage = args[0];                                          byte[] msg = Encoding.ASCII.GetBytes(theMessage+"");                                          int bytesSent = sender.Send(msg);                                          int bytesRec = sender.Receive(bytes);                                           Console.WriteLine("The Server says : {0}",                                           Encoding.ASCII.GetString(bytes,0, bytesRec));                                           Sender.Shutdown(SocketShutdown.Both);                                           sender.Close();                                    } catch(Exception e)                        {                          Console.WriteLine("Exception: {0}", e.ToString());                         }              } }