class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Tcp/TcpChannel.cs

   1 //
   2 // System.Runtime.Remoting.Channels.Tcp.TcpChannel.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
  35 namespace System.Runtime.Remoting.Channels.Tcp
  36 {
  37         public class TcpChannel : IChannelReceiver, IChannel, IChannelSender
  38         {
  39                 private TcpClientChannel _clientChannel;
  40                 private TcpServerChannel _serverChannel;
  41                 private string _name = "tcp";
  42                 private int _priority = 1;
  43
  44                 public TcpChannel ()
  45                 {
  46                         Init (new Hashtable(), null, null);
  47                 }
  48
  49                 public TcpChannel (int port)
  50                 {
  51                         Hashtable ht = new Hashtable();
  52                         ht ["port"] = port.ToString();
  53                         Init (ht, null, null);
  54                 }
  55
  56                 void Init (IDictionary properties, IClientChannelSinkProvider clientSink, IServerChannelSinkProvider serverSink)
  57                 {
  58                         _clientChannel = new TcpClientChannel (properties,clientSink);
  59
  60                         if (properties != null) {
  61                                 if(properties["port"] != null)
  62                                         _serverChannel = new TcpServerChannel(properties, serverSink);
  63
  64                                 object val = properties ["name"];
  65                                 if (val != null)
  66                                         _name = val as string;
  67
  68                                 val = properties ["priority"];
  69                                 if (val != null)
  70                                         _priority = Convert.ToInt32 (val);
  71                         }
  72                 }
  73
  74
  75                 public TcpChannel (IDictionary properties,
  76                                    IClientChannelSinkProvider clientSinkProvider,
  77                                    IServerChannelSinkProvider serverSinkProvider)
  78                 {
  79                         Init (properties, clientSinkProvider, serverSinkProvider);
  80                 }
  81
  82                 public IMessageSink CreateMessageSink(string url, object remoteChannelData, out string objectURI)
  83                 {
  84                         return _clientChannel.CreateMessageSink(url,
  85                                 remoteChannelData, out objectURI);
  86                 }
  87
  88                 public string ChannelName {
  89                         get { return _name; }
  90                 }
  91
  92                 public int ChannelPriority {
  93                         get { return _priority; }
  94                 }
  95
  96                 public void StartListening (object data)
  97                 {
  98                         if (_serverChannel != null)
  99                                 _serverChannel.StartListening (data);
 100                 }
 101
 102                 public void StopListening (object data)
 103                 {
 104                         if (_serverChannel != null)
 105                                 _serverChannel.StopListening(data);
 106                         TcpConnectionPool.Shutdown ();
 107                 }
 108
 109                 public string [] GetUrlsForUri (string objectURI)
 110                 {
 111                         if (_serverChannel != null)
 112                                 return _serverChannel.GetUrlsForUri (objectURI);
 113                         return null;
 114                 }
 115
 116                 public object ChannelData {
 117                         get {
 118                                 if (_serverChannel != null)
 119                                         return _serverChannel.ChannelData;
 120                                 return null;
 121                         }
 122                 }
 123
 124                 public string Parse (string url, out string objectURI)
 125                 {
 126                         return TcpChannel.ParseChannelUrl (url, out objectURI);
 127                 }
 128
 129                 internal static string ParseChannelUrl (string url, out string objectURI)
 130                 {
 131                         if (url == null)
 132                                 throw new ArgumentNullException ("url");
 133
 134                         string host, port;
 135
 136                         return ParseTcpURL (url, out host, out port, out objectURI);
 137                 }
 138
 139                 internal static string ParseTcpURL (string url, out string host, out string port, out string objectURI)
 140                 {
 141                         // format: "tcp://host:port/path/to/object"
 142                         objectURI = null;
 143                         host = null;
 144                         port = null;
 145
 146                         // url needs to be at least "tcp:"
 147                         if (url.Length < 4 || url[3] != ':' ||
 148                             (url[0] != 'T' && url[0] != 't') ||
 149                             (url[1] != 'C' && url[1] != 'c') ||
 150                             (url[2] != 'P' && url[2] != 'p'))
 151                                 return null;
 152
 153                         // "tcp:" is acceptable
 154                         if (url.Length == 4)
 155                                 return url;
 156
 157                         // must be of the form "tcp://"
 158                         if (url.Length <= 5 || url[4] != '/' || url[5] != '/')
 159                                 return null;
 160
 161                         // "tcp://" is acceptable
 162                         if (url.Length == 6)
 163                                 return url;
 164
 165                         int i;
 166                         for (i = 6; i < url.Length; i++) {
 167                                 if (url[i] == ':' || url[i] == '/')
 168                                         break;
 169                         }
 170
 171                         host = url.Substring (6, i - 6);
 172
 173                         if (i + 1 < url.Length && url[i] == ':') {
 174                                 int start = i + 1;
 175
 176                                 for (i++; i < url.Length; i++) {
 177                                         if (url[i] == '/')
 178                                                 break;
 179                                 }
 180
 181                                 if (i > start)
 182                                         port = url.Substring (start, i - start);
 183                         }
 184
 185                         if (i >= url.Length || url[i] != '/')
 186                                 return url;
 187
 188                         objectURI = url.Substring (i);
 189
 190                         return url.Substring (0, i);
 191                 }
 192         }
 193 }