1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.net.telnet;
18
19 import java.net.ServerSocket;
20 import java.net.Socket;
21 import java.io.InputStream;
22 import java.io.OutputStream;
23 import java.io.IOException;
24
25 /***
26 * Simple TCP server.
27 * Waits for connections on a TCP port in a separate thread.
28 * <p>
29 * @author Bruno D'Avanzo
30 ***/
31 public class TelnetTestSimpleServer implements Runnable
32 {
33 ServerSocket serverSocket = null;
34 Socket clientSocket = null;
35 Thread listener = null;
36
37 /***
38 * test of client-driven subnegotiation.
39 * <p>
40 * @param port - server port on which to listen.
41 ***/
42 public TelnetTestSimpleServer(int port) throws IOException
43 {
44 serverSocket = new ServerSocket(port);
45
46 listener = new Thread (this);
47
48 listener.start();
49 }
50
51 /***
52 * Run for the thread. Waits for new connections
53 ***/
54 public void run()
55 {
56 boolean bError = false;
57 while(!bError)
58 {
59 try
60 {
61 clientSocket = serverSocket.accept();
62 synchronized (clientSocket)
63 {
64 try
65 {
66 clientSocket.wait();
67 }
68 catch (Exception e)
69 {
70 System.err.println("Exception in wait, "+ e.getMessage());
71 }
72 try
73 {
74 clientSocket.close();
75 }
76 catch (Exception e)
77 {
78 System.err.println("Exception in close, "+ e.getMessage());
79 }
80 }
81 }
82 catch (IOException e)
83 {
84 bError = true;
85 }
86 }
87
88 try
89 {
90 serverSocket.close();
91 }
92 catch (Exception e)
93 {
94 System.err.println("Exception in close, "+ e.getMessage());
95 }
96 }
97
98
99 /***
100 * Disconnects the client socket
101 ***/
102 public void disconnect()
103 {
104 synchronized (clientSocket)
105 {
106 try
107 {
108 clientSocket.notify();
109 }
110 catch (Exception e)
111 {
112 System.err.println("Exception in notify, "+ e.getMessage());
113 }
114 }
115 }
116
117 /***
118 * Stop the listener thread
119 ***/
120 public void stop()
121 {
122 listener.interrupt();
123 try
124 {
125 serverSocket.close();
126 }
127 catch (Exception e)
128 {
129 System.err.println("Exception in close, "+ e.getMessage());
130 }
131 }
132
133 /***
134 * Gets the input stream for the client socket
135 ***/
136 public InputStream getInputStream() throws IOException
137 {
138 if(clientSocket != null)
139 {
140 return(clientSocket.getInputStream());
141 }
142 else
143 {
144 return(null);
145 }
146 }
147
148 /***
149 * Gets the output stream for the client socket
150 ***/
151 public OutputStream getOutputStream() throws IOException
152 {
153 if(clientSocket != null)
154 {
155 return(clientSocket.getOutputStream());
156 }
157 else
158 {
159 return(null);
160 }
161 }
162 }