1 //
2 // Mono.Remoting.Channels.Unix.UnixServerTransportSink.cs
3 //
4 // Author: Rodrigo Moya (rodrigo@ximian.com)
5 //         Lluis Sanchez Gual (lsg@ctv.es)
6 //
7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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;
32 using System.Net.Sockets;
33 using System.Collections;
34 using System.Runtime.Remoting.Messaging;
35 using System.IO;
36 using System.Runtime.Remoting.Channels;
37 
38 namespace Mono.Remoting.Channels.Unix
39 {
40     internal class UnixServerTransportSink : IServerChannelSink, IChannelSinkBase
41     {
42         IServerChannelSink next_sink;
43 
UnixServerTransportSink(IServerChannelSink next)44         public UnixServerTransportSink (IServerChannelSink next)
45         {
46             next_sink = next;
47         }
48 
49         public IServerChannelSink NextChannelSink
50         {
51             get
52             {
53                 return next_sink;
54             }
55         }
56 
57         public IDictionary Properties
58         {
59             get
60             {
61                 if (next_sink != null) return next_sink.Properties;
62                 else return null;
63             }
64         }
65 
AsyncProcessResponse(IServerResponseChannelSinkStack sinkStack, object state, IMessage msg, ITransportHeaders headers, Stream responseStream)66         public void AsyncProcessResponse (IServerResponseChannelSinkStack sinkStack, object state,
67                                           IMessage msg, ITransportHeaders headers, Stream responseStream)
68         {
69             ClientConnection connection = (ClientConnection)state;
70             NetworkStream stream = new NetworkStream (connection.Client);
71             UnixMessageIO.SendMessageStream (stream, responseStream, headers, connection.Buffer);
72             stream.Flush ();
73             stream.Close ();
74         }
75 
GetResponseStream(IServerResponseChannelSinkStack sinkStack, object state, IMessage msg, ITransportHeaders headers)76         public Stream GetResponseStream (IServerResponseChannelSinkStack sinkStack, object state,
77                                          IMessage msg, ITransportHeaders headers)
78         {
79             return null;
80         }
81 
ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)82         public ServerProcessing ProcessMessage (IServerChannelSinkStack sinkStack,
83                                                 IMessage requestMsg,
84                                                 ITransportHeaders requestHeaders,
85                                                 Stream requestStream,
86                                                 out IMessage responseMsg,
87                                                 out ITransportHeaders responseHeaders,
88                                                 out Stream responseStream)
89         {
90             // this is the first sink, and UnixServerChannel does not call it.
91             throw new NotSupportedException ();
92         }
93 
InternalProcessMessage(ClientConnection connection, Stream stream)94         internal void InternalProcessMessage (ClientConnection connection, Stream stream)
95         {
96             // Reads the headers and the request stream
97 
98             Stream requestStream;
99             ITransportHeaders requestHeaders;
100 
101             requestStream = UnixMessageIO.ReceiveMessageStream (stream, out requestHeaders, connection.Buffer);
102 
103 /*            try {
104                 PeerCred cred = connection.Client.PeerCredential;
105                 requestHeaders["__uid"] = cred.UserID;
106             } catch (Exception e) {
107                 Console.WriteLine ("Couldn't get the peer cred: " + e);
108             }
109 */
110             // Pushes the connection object together with the sink. This information
111             // will be used for sending the response in an async call.
112 
113             ServerChannelSinkStack sinkStack = new ServerChannelSinkStack();
114             sinkStack.Push(this, connection);
115 
116             ITransportHeaders responseHeaders;
117             Stream responseStream;
118             IMessage responseMsg;
119 
120             ServerProcessing proc = next_sink.ProcessMessage(sinkStack, null, requestHeaders, requestStream, out responseMsg, out responseHeaders, out responseStream);
121 
122             switch (proc)
123             {
124             case ServerProcessing.Complete:
125                 UnixMessageIO.SendMessageStream (stream, responseStream, responseHeaders, connection.Buffer);
126                 stream.Flush ();
127                 break;
128 
129             case ServerProcessing.Async:
130             case ServerProcessing.OneWay:
131                 break;
132             }
133         }
134     }
135 }
136 
137