How to configure socket connect timeout

Question

When the Client tries to connect to a disconnected IP address, there is a long timeout over 15 seconds... How can we reduce this timeout? What is the method to configure it?

The code I'm using to set up a socket connection is as following:

try {     m_clientSocket = new Socket(          AddressFamily.InterNetwork,          SocketType.Stream,          ProtocolType.Tcp);      IPAddress ip = IPAddress.Parse(serverIp);     int iPortNo = System.Convert.ToInt16(serverPort);     IPEndPoint ipEnd = new IPEndPoint(ip, iPortNo);      m_clientSocket.Connect(ipEnd);     if (m_clientSocket.Connected)     {         lb_connectStatus.Text = "Connection Established";         WaitForServerData();     } } catch (SocketException se) {     lb_connectStatus.Text = "Connection Failed";     MessageBox.Show(se.Message); } 

Answer 1

I found this. Simpler than the accepted answer, and works with .NET v2

Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);  // Connect using a timeout (5 seconds)  IAsyncResult result = socket.BeginConnect( sIP, iPort, null, null );  bool success = result.AsyncWaitHandle.WaitOne( 5000, true );  if ( socket.Connected ) {     socket.EndConnect( result ); } else  {      // NOTE, MUST CLOSE THE SOCKET       socket.Close();      throw new ApplicationException("Failed to connect server."); }  //...  

Answer 2

My take:

public static class SocketExtensions {     /// <summary>     /// Connects the specified socket.     /// </summary>     /// <param name="socket">The socket.</param>     /// <param name="endpoint">The IP endpoint.</param>     /// <param name="timeout">The timeout.</param>     public static void Connect(this Socket socket, EndPoint endpoint, TimeSpan timeout)     {         var result = socket.BeginConnect(endpoint, null, null);          bool success = result.AsyncWaitHandle.WaitOne(timeout, true);         if (success)         {             socket.EndConnect(result);         }         else         {             socket.Close();             throw new SocketException(10060); // Connection timed out.         }     } }