mcs/class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Tcp/TcpServerChannel.cs

   1 //
   2 // System.Runtime.Remoting.Channels.Tcp.TcpServerChannel.cs
   3 //
   4 // Author: Rodrigo Moya (rodrigo@ximian.com)
   5 //         Lluis Sanchez Gual (lluis@ideary.com)
   6 //
   7 // 2002 (C) Copyright, Ximian, Inc.
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections;
  32 using System.Runtime.Remoting.Messaging;
  33 using System.Text.RegularExpressions;
  34 using System.Net.Sockets;
  35 using System.Net;
  36 using System.Threading;
  37 using System.IO;
  38 using System.Runtime.Remoting.Channels;
  39
  40 namespace System.Runtime.Remoting.Channels.Tcp
  41 {
  42         public class TcpServerChannel : IChannelReceiver, IChannel
  43         {
  44                 int port = 0;
  45                 string name = "tcp";
  46                 string host = null;
  47                 int priority = 1;
  48                 bool supressChannelData = false;
  49                 bool useIpAddress = false;
  50
  51                 IPAddress bindAddress = IPAddress.Any;
  52                 Thread server_thread = null;
  53                 TcpListener listener;
  54                 TcpServerTransportSink sink;
  55                 ChannelDataStore channel_data;
  56
  57                 RemotingThreadPool threadPool;
  58
  59                 void Init (IServerChannelSinkProvider serverSinkProvider)
  60                 {
  61                         if (serverSinkProvider == null) \r
  62                         {
  63                                 serverSinkProvider = new BinaryServerFormatterSinkProvider ();
  64                         }
  65
  66                         if (host == null)
  67                         {
  68                                 if (useIpAddress) {
  69                                         if (!bindAddress.Equals(IPAddress.Any)) host = bindAddress.ToString ();
  70                                         else {
  71                                                 IPHostEntry he = Dns.Resolve (Dns.GetHostName());
  72                                                 if (he.AddressList.Length == 0) throw new RemotingException ("IP address could not be determined for this host");
  73                                                 host = he.AddressList [0].ToString ();
  74                                         }
  75                                 }
  76                                 else
  77                                         host = Dns.GetHostByName(Dns.GetHostName()).HostName;
  78                         }
  79
  80                         // Gets channel data from the chain of channel providers
  81
  82                         channel_data = new ChannelDataStore (null);
  83                         IServerChannelSinkProvider provider = serverSinkProvider;\r
  84                         while (provider != null)\r
  85                         {\r
  86                                 provider.GetChannelData(channel_data);\r
  87                                 provider = provider.Next;\r
  88                         }\r
  89
  90                         // Creates the sink chain that will process all incoming messages
  91
  92                         IServerChannelSink next_sink = ChannelServices.CreateServerChannelSinkChain (serverSinkProvider, this);\r
  93                         sink = new TcpServerTransportSink (next_sink);
  94                 }
  95
  96                 public TcpServerChannel (int port)
  97                 {
  98                         this.port = port;
  99                         Init (null);
 100                 }
 101
 102                 public TcpServerChannel (IDictionary properties,
 103                                          IServerChannelSinkProvider serverSinkProvider)
 104                 {
 105                         foreach(DictionaryEntry property in properties)
 106                         {\r
 107                                 switch((string)property.Key)\r
 108                                 {\r
 109                                         case "name":
 110                                                 name = property.Value.ToString();
 111                                                 break;
 112                                         case "port":\r
 113                                                 port = Convert.ToInt32(property.Value);
 114                                                 break;\r
 115                                         case "priority":\r
 116                                                 priority = Convert.ToInt32(property.Value);
 117                                                 break;\r
 118                                         case "bindTo":\r
 119                                                 bindAddress = IPAddress.Parse((string)property.Value);
 120                                                 break;\r
 121                                         case "rejectRemoteRequests":\r
 122                                                 if(Convert.ToBoolean(properties["rejectRemoteRequests"]))
 123                                                         bindAddress = IPAddress.Loopback;
 124                                                 break;
 125                                         case "supressChannelData":
 126                                                 supressChannelData = Convert.ToBoolean (property.Value);
 127                                                 break;\r
 128                                         case "useIpAddress":
 129                                                 useIpAddress = Convert.ToBoolean (property.Value);
 130                                                 break;
 131                                         case "machineName":
 132                                                 host = property.Value as string;
 133                                                 break;
 134                                 }\r
 135                         }
 136                         Init (serverSinkProvider);
 137                 }
 138
 139                 public TcpServerChannel (string name, int port,
 140                                          IServerChannelSinkProvider serverSinkProvider)
 141                 {
 142                         this.name = name;
 143                         this.port = port;
 144                         Init (serverSinkProvider);
 145                 }
 146
 147                 public TcpServerChannel (string name, int port)
 148                 {
 149                         this.name = name;
 150                         this.port = port;
 151                         Init (null);
 152                 }
 153
 154                 public object ChannelData
 155                 {
 156                         get {
 157                                 if (supressChannelData) return null;
 158                                 else return channel_data;
 159                         }
 160                 }
 161
 162                 public string ChannelName
 163                 {
 164                         get {
 165                                 return name;
 166                         }
 167                 }
 168
 169                 public int ChannelPriority
 170                 {
 171                         get {
 172                                 return priority;
 173                         }
 174                 }
 175
 176                 public string GetChannelUri ()
 177                 {
 178                         return "tcp://" + host + ":" + port;
 179                 }
 180
 181                 public string[] GetUrlsForUri (string uri)\r
 182                 {\r
 183                         if (!uri.StartsWith ("/")) uri = "/" + uri;
 184 \r
 185                         string [] chnl_uris = channel_data.ChannelUris;\r
 186                         string [] result = new String [chnl_uris.Length];\r
 187 \r
 188                         for (int i = 0; i < chnl_uris.Length; i++) \r
 189                                 result [i] = chnl_uris [i] + uri;\r
 190                         \r
 191                         return result;\r
 192                 }\r
 193
 194                 public string Parse (string url, out string objectURI)
 195                 {
 196                         return TcpChannel.ParseChannelUrl (url, out objectURI);
 197                 }
 198
 199                 void WaitForConnections ()
 200                 {
 201                         try
 202                         {
 203                                 while (true)
 204                                 {
 205                                         Socket socket = listener.AcceptSocket ();
 206                                         ClientConnection reader = new ClientConnection (this, socket, sink);
 207                                         try {
 208                                                 if (!threadPool.RunThread (new ThreadStart (reader.ProcessMessages)))
 209                                                         socket.Close ();
 210                                         } catch {}
 211                                 }
 212                         }
 213                         catch
 214                         {}
 215                 }
 216
 217                 public void StartListening (object data)
 218                 {
 219                         listener = new TcpListener (bindAddress, port);
 220                         if (server_thread == null) \r
 221                         {
 222                                 threadPool = RemotingThreadPool.GetSharedPool ();
 223                                 listener.Start ();
 224
 225                                 if (port == 0)
 226                                         port = ((IPEndPoint)listener.LocalEndpoint).Port;
 227
 228                                 string[] uris = new String [1];
 229                                 uris = new String [1];
 230                                 uris [0] = GetChannelUri ();
 231                                 channel_data.ChannelUris = uris;
 232
 233                                 server_thread = new Thread (new ThreadStart (WaitForConnections));
 234                                 server_thread.IsBackground = true;
 235                                 server_thread.Start ();
 236                         }
 237                 }
 238
 239                 public void StopListening (object data)
 240                 {
 241                         if (server_thread == null) return;
 242
 243                         server_thread.Abort ();
 244                         listener.Stop ();
 245                         threadPool.Free ();
 246                         server_thread.Join ();
 247                         server_thread = null;
 248                 }
 249         }
 250
 251         class ClientConnection
 252         {
 253                 static int _count;
 254                 int _id;
 255                 Socket _socket;
 256                 TcpServerTransportSink _sink;
 257                 Stream _stream;
 258                 TcpServerChannel _serverChannel;
 259
 260                 byte[] _buffer = new byte[TcpMessageIO.DefaultStreamBufferSize];
 261
 262                 public ClientConnection (TcpServerChannel serverChannel, Socket socket, TcpServerTransportSink sink)
 263                 {
 264                         _serverChannel = serverChannel;
 265                         _socket = socket;
 266                         _sink = sink;
 267                         _id = _count++;
 268                 }
 269
 270                 public Stream Stream
 271                 {
 272                         get { return _stream; }
 273                 }
 274
 275                 public byte[] Buffer
 276                 {
 277                         get { return _buffer; }
 278                 }
 279
 280                 public void ProcessMessages()
 281                 {
 282                         byte[] buffer = new byte[256];
 283                         NetworkStream ns = new NetworkStream (_socket);
 284                         _stream = new BufferedStream (ns);
 285
 286                         try
 287                         {
 288                                 bool end = false;
 289                                 while (!end)
 290                                 {
 291                                         MessageStatus type = TcpMessageIO.ReceiveMessageStatus (_stream, buffer);
 292
 293                                         switch (type)
 294                                         {
 295                                                 case MessageStatus.MethodMessage:
 296                                                         _sink.InternalProcessMessage (this);
 297                                                         break;
 298
 299                                                 case MessageStatus.Unknown:
 300                                                 case MessageStatus.CancelSignal:
 301                                                         end = true;
 302                                                         break;
 303                                         }
 304                                         _stream.Flush ();
 305                                 }
 306                         }
 307                         catch (Exception ex)
 308                         {
 309 //                              Console.WriteLine (ex);
 310                         }
 311                         finally
 312                         {
 313                                 try {
 314                                         _stream.Close();
 315                                         _socket.Close ();
 316                                 }
 317                                 catch { }
 318                         }
 319                 }
 320
 321                 public int Id
 322                 {
 323                         get { return _id; }
 324                 }
 325
 326                 public IPAddress ClientAddress
 327                 {
 328                         get {
 329                                 IPEndPoint ep = _socket.RemoteEndPoint as IPEndPoint;
 330                                 if (ep != null) return ep.Address;
 331                                 else return null;
 332                         }
 333                 }
 334         }
 335 }