mcs/class/System.Runtime.Remoting/System.Runtime.Remoting.Channels.Ipc.Win32/IpcTransport.cs

   1 //
   2 // System.Runtime.Remoting.Channels.Ipc.Win32.IpcTransport.cs
   3 //
   4 // Author: Robert Jordan (robertj@gmx.net)
   5 //
   6 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   7 //
   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 #if NET_2_0
  30
  31 using System;
  32 using System.IO;
  33 using System.Runtime.Remoting;
  34 using System.Runtime.Remoting.Channels;
  35 using System.Runtime.Remoting.Messaging;
  36 using System.Runtime.Serialization.Formatters.Binary;
  37
  38 namespace System.Runtime.Remoting.Channels.Ipc.Win32
  39 {
  40     /// <summary>
  41     /// IPC transport helper
  42     /// </summary>
  43     internal class IpcTransport
  44     {
  45         readonly NamedPipeSocket socket;
  46         readonly BinaryFormatter formatter = new BinaryFormatter();
  47
  48         /// <summary>
  49         /// Creates a new object.
  50         /// </summary>
  51         /// <param name="socket">The named pipe.</param>
  52         public IpcTransport(NamedPipeSocket socket)
  53         {
  54             this.socket = socket;
  55         }
  56
  57         /// <summary>
  58         /// Writes a request.
  59         /// </summary>
  60         /// <param name="header"></param>
  61         /// <param name="requestStream"></param>
  62         public void Write(ITransportHeaders header, Stream requestStream)
  63         {
  64             Stream bs = socket.GetStream();
  65
  66             MemoryStream m = new MemoryStream();
  67             formatter.Serialize(m, header);
  68             m.Position = 0;
  69             byte[] bytes = BitConverter.GetBytes((int)m.Length);
  70             bs.Write(bytes, 0, bytes.Length);
  71             m.WriteTo(bs);
  72
  73             try
  74             {
  75                 bytes = BitConverter.GetBytes((int)requestStream.Length);
  76                 bs.Write(bytes, 0, bytes.Length);
  77                 IpcChannelHelper.Copy(requestStream, bs);
  78             }
  79             catch
  80             {
  81                 bs.Write(bytes, 0, bytes.Length);
  82             }
  83
  84             bs.Flush();
  85         }
  86
  87         /// <summary>
  88         /// Reads a response.
  89         /// </summary>
  90         /// <param name="headers"></param>
  91         /// <param name="responseStream"></param>
  92         public void Read(out ITransportHeaders headers, out Stream responseStream)
  93         {
  94             byte[] bytes;
  95             long length;
  96
  97             bytes = BitConverter.GetBytes(int.MaxValue);
  98             socket.Receive(bytes, 0, bytes.Length);
  99             length = BitConverter.ToInt32(bytes, 0);
 100
 101             if (length != int.MaxValue && length > 0)
 102             {
 103                 bytes = new byte[length];
 104                 socket.Receive(bytes, 0, (int)length);
 105
 106                 MemoryStream m = new MemoryStream(bytes);
 107                 headers = (ITransportHeaders) formatter.Deserialize(m);
 108             }
 109             else
 110             {
 111                 headers = new TransportHeaders();
 112             }
 113
 114             bytes = BitConverter.GetBytes(int.MaxValue);
 115             socket.Receive(bytes, 0, bytes.Length);
 116             length = BitConverter.ToInt32(bytes, 0);
 117             if (length != int.MaxValue && length > 0)
 118             {
 119                 bytes = new byte[length];
 120                 socket.Receive(bytes, 0, (int)length);
 121                 responseStream = new MemoryStream(bytes);
 122             }
 123             else
 124             {
 125                 responseStream = new MemoryStream(new byte[0]);
 126             }
 127         }
 128
 129         /// <summary>
 130         /// Closes the unterlying named pipe socket.
 131         /// </summary>
 132         public void Close()
 133         {
 134             socket.Close();
 135         }
 136     }
 137 }
 138
 139 #endif