mcs/class/System/Test/System.Net/SocketResponder.cs

   1 //
   2 // SocketResponder.cs - Utility class for tests that require a listener
   3 //
   4 // Author:
   5 //      Gert Driesen (drieseng@users.sourceforge.net)
   6 //
   7 // Copyright (C) 2007 Gert Driesen
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Globalization;
  31 using System.IO;
  32 using System.Net;
  33 using System.Net.Sockets;
  34 using System.Text;
  35 using System.Threading;
  36
  37 namespace MonoTests.System.Net
  38 {
  39         public delegate byte [] SocketRequestHandler (Socket socket);
  40
  41         public class SocketResponder : IDisposable
  42         {
  43                 private TcpListener tcpListener;
  44                 private readonly IPEndPoint _localEndPoint;
  45                 private Thread listenThread;
  46                 private Socket listenSocket;
  47                 private SocketRequestHandler _requestHandler;
  48                 private int _state = 0;
  49                 private readonly object _syncRoot = new object ();
  50
  51                 private const int SOCKET_CLOSED = 10004;
  52                 private const int SOCKET_INVALID_ARGS = 10022;
  53
  54                 private const int STATE_UNINITIALIZED = 0;
  55                 private const int STATE_RUNNING = 1;
  56                 private const int STATE_STOPPED = 2;
  57
  58                 public SocketResponder (IPEndPoint localEP, SocketRequestHandler requestHandler)
  59                 {
  60                         _localEndPoint = localEP;
  61                         _requestHandler = requestHandler;
  62                 }
  63
  64                 public IPEndPoint LocalEndPoint
  65                 {
  66                         get { return _localEndPoint; }
  67                 }
  68
  69                 public void Dispose ()
  70                 {
  71                         Stop ();
  72                 }
  73
  74                 public bool IsStopped
  75                 {
  76                         get
  77                         {
  78                                 lock (_syncRoot) {
  79                                         return _state != STATE_RUNNING;
  80                                 }
  81                         }
  82                 }
  83
  84                 public void Start ()
  85                 {
  86                         lock (_syncRoot) {
  87                                 if (_state != STATE_UNINITIALIZED)
  88                                         throw new InvalidOperationException ("cannot restart SocketResponder");
  89                                 _state = STATE_RUNNING;
  90                                 tcpListener = new TcpListener (LocalEndPoint);
  91                                 tcpListener.Start ();
  92                                 listenThread = new Thread (new ThreadStart (Listen));
  93                                 listenThread.Start ();
  94                         }
  95                 }
  96
  97                 public void Stop ()
  98                 {
  99                         lock (_syncRoot) {
 100                                 if (_state != STATE_RUNNING)
 101                                         return;
 102                                 _state = STATE_STOPPED;
 103                                 if (tcpListener != null) {
 104                                         tcpListener.Stop ();
 105                                         tcpListener = null;
 106                                         if (listenSocket != null)
 107                                                 listenSocket.Close ();
 108 #if MONO_FEATURE_THREAD_ABORT
 109                                         listenThread.Abort ();
 110 #else
 111                                         listenThread.Interrupt ();
 112 #endif
 113                                         listenThread.Join ();
 114                                         listenThread = null;
 115                                         Thread.Sleep (50);
 116                                 }
 117                         }
 118                 }
 119
 120                 private void Listen ()
 121                 {
 122                         while (_state == STATE_RUNNING) {
 123                                 listenSocket = null;
 124                                 try {
 125                                         listenSocket = tcpListener.AcceptSocket ();
 126                                         listenSocket.Send (_requestHandler (listenSocket));
 127                                         try {
 128                                                 listenSocket.Shutdown (SocketShutdown.Receive);
 129                                                 listenSocket.Shutdown (SocketShutdown.Send);
 130                                         } catch {
 131                                         }
 132                                 } catch (SocketException ex) {
 133                                         // ignore interruption of blocking call
 134                                         if (ex.ErrorCode != SOCKET_CLOSED && ex.ErrorCode != SOCKET_INVALID_ARGS && _state != STATE_STOPPED)
 135                                                 throw;
 136                                 } catch (ObjectDisposedException ex) {
 137                                         Console.WriteLine (ex);
 138                                         if (_state != STATE_STOPPED)
 139                                                 throw;
 140 #if MOBILE
 141                                 } catch (InvalidOperationException ex) {
 142                                         // This breaks some tests running on Android. The problem is that the stack trace
 143                                         // doesn't point to where the exception is actually thrown from but the entire process
 144                                         // is aborted because of unhandled exception.
 145                                         Console.WriteLine ("SocketResponder.Listen failed:");
 146                                         Console.WriteLine (ex);
 147 #endif
 148                                 } finally {
 149                                         Thread.Sleep (500);
 150                                         if (listenSocket != null)
 151                                                 listenSocket.Close ();
 152                                 }
 153                         }
 154                 }
 155         }
 156 }