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1		/*
2		* Copyright 2003-2004 The Apache Software Foundation
3		*
4		* Licensed under the Apache License, Version 2.0 (the "License");
5		* you may not use this file except in compliance with the License.
6		* You may obtain a copy of the License at
7		*
8		* http://www.apache.org/licenses/LICENSE-2.0
9		*
10		* Unless required by applicable law or agreed to in writing, software
11		* distributed under the License is distributed on an "AS IS" BASIS,
12		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13		* See the License for the specific language governing permissions and
14		* limitations under the License.
15		*/
16		package examples;
17
18		import java.io.InputStream;
19		import java.io.OutputStream;
20		import java.io.FileOutputStream;
21		import java.io.IOException;
22		import org.apache.commons.net.telnet.TelnetClient;
23		import org.apache.commons.net.telnet.TelnetNotificationHandler;
24		import org.apache.commons.net.telnet.SimpleOptionHandler;
25		import org.apache.commons.net.telnet.EchoOptionHandler;
26		import org.apache.commons.net.telnet.TerminalTypeOptionHandler;
27		import org.apache.commons.net.telnet.SuppressGAOptionHandler;
28		import org.apache.commons.net.telnet.InvalidTelnetOptionException;
29		import java.util.StringTokenizer;
30
31
32		/***
33		* This is a simple example of use of TelnetClient.
34		* An external option handler (SimpleTelnetOptionHandler) is used.
35		* Initial configuration requested by TelnetClient will be:
36		* WILL ECHO, WILL SUPPRESS-GA, DO SUPPRESS-GA.
37		* VT100 terminal type will be subnegotiated.
38		* <p>
39		* Also, use of the sendAYT(), getLocalOptionState(), getRemoteOptionState()
40		* is demonstrated.
41		* When connected, type AYT to send an AYT command to the server and see
42		* the result.
43		* Type OPT to see a report of the state of the first 25 options.
44		* <p>
45		* @author Bruno D'Avanzo
46		***/
47	0	public class TelnetClientExample implements Runnable, TelnetNotificationHandler
48		{
49	0	static TelnetClient tc = null;
50
51		/***
52		* Main for the TelnetClientExample.
53		***/
54		public static void main(String[] args) throws IOException
55		{
56	0	FileOutputStream fout = null;
57
58	0	if(args.length < 1)
59		{
60	0	System.err.println("Usage: TelnetClientExample1 <remote-ip> [<remote-port>]");
61	0	System.exit(1);
62		}
63
64	0	String remoteip = args[0];
65
66		int remoteport;
67
68	0	if (args.length > 1)
69		{
70	0	remoteport = (new Integer(args[1])).intValue();
71		}
72		else
73		{
74	0	remoteport = 23;
75		}
76
77		try
78		{
79	0	fout = new FileOutputStream ("spy.log", true);
80		}
81	0	catch (Exception e)
82		{
83	0	System.err.println(
84		"Exception while opening the spy file: "
85		+ e.getMessage());
86	0	}
87
88	0	tc = new TelnetClient();
89
90	0	TerminalTypeOptionHandler ttopt = new TerminalTypeOptionHandler("VT100", false, false, true, false);
91	0	EchoOptionHandler echoopt = new EchoOptionHandler(true, false, class="keyword">true, false);
92	0	SuppressGAOptionHandler gaopt = new SuppressGAOptionHandler(true, class="keyword">true, class="keyword">true, class="keyword">true);
93
94		try
95		{
96	0	tc.addOptionHandler(ttopt);
97	0	tc.addOptionHandler(echoopt);
98	0	tc.addOptionHandler(gaopt);
99		}
100	0	catch (InvalidTelnetOptionException e)
101		{
102	0	System.err.println("Error registering option handlers: " + e.getMessage());
103	0	}
104
105		while (true)
106		{
107	0	boolean end_loop = false;
108		try
109		{
110	0	tc.connect(remoteip, remoteport);
111
112
113	0	Thread reader = new Thread (class="keyword">new TelnetClientExample());
114	0	tc.registerNotifHandler(new TelnetClientExample());
115	0	System.out.println("TelnetClientExample");
116	0	System.out.println("Type AYT to send an AYT telnet command");
117	0	System.out.println("Type OPT to print a report of status of options (0-24)");
118	0	System.out.println("Type REGISTER to register a new SimpleOptionHandler");
119	0	System.out.println("Type UNREGISTER to unregister an OptionHandler");
120	0	System.out.println("Type SPY to register the spy (connect to port 3333 to spy)");
121	0	System.out.println("Type UNSPY to stop spying the connection");
122
123	0	reader.start();
124	0	OutputStream outstr = tc.getOutputStream();
125
126	0	byte[] buff = new byte[1024];
127	0	int ret_read = 0;
128
129		do
130		{
131		try
132		{
133	0	ret_read = System.in.read(buff);
134	0	if(ret_read > 0)
135		{
136	0	if((new String(buff, 0, ret_read)).startsWith("AYT"))
137		{
138		try
139		{
140	0	System.out.println("Sending AYT");
141
142	0	System.out.println("AYT response:" + tc.sendAYT(5000));
143		}
144	0	catch (Exception e)
145		{
146	0	System.err.println("Exception waiting AYT response: " + e.getMessage());
147	0	}
148		}
149	0	else if((new String(buff, 0, ret_read)).startsWith("OPT"))
150		{
151	0	System.out.println("Status of options:");
152	0	for(int ii=0; ii<25; ii++)
153	0	System.out.println("Local Option " + ii + ":" + tc.getLocalOptionState(ii) + " Remote Option " + ii + ":" + tc.getRemoteOptionState(ii));
154		}
155	0	else if((new String(buff, 0, ret_read)).startsWith("REGISTER"))
156		{
157	0	StringTokenizer st = new StringTokenizer(class="keyword">new String(buff));
158		try
159		{
160	0	st.nextToken();
161	0	int opcode = (new Integer(st.nextToken())).class="keyword">intValue();
162	0	boolean initlocal = (new Boolean(st.nextToken())).class="keyword">booleanValue();
163	0	boolean initremote = (new Boolean(st.nextToken())).class="keyword">booleanValue();
164	0	boolean acceptlocal = (new Boolean(st.nextToken())).class="keyword">booleanValue();
165	0	boolean acceptremote = (new Boolean(st.nextToken())).class="keyword">booleanValue();
166	0	SimpleOptionHandler opthand = new SimpleOptionHandler(opcode, initlocal, initremote,
167		acceptlocal, acceptremote);
168	0	tc.addOptionHandler(opthand);
169		}
170	0	catch (Exception e)
171		{
172	0	if(e instanceof InvalidTelnetOptionException)
173		{
174	0	System.err.println("Error registering option: " + e.getMessage());
175		}
176		else
177		{
178	0	System.err.println("Invalid REGISTER command.");
179	0	System.err.println("Use REGISTER optcode initlocal initremote acceptlocal acceptremote");
180	0	System.err.println("(optcode is an integer.)");
181	0	System.err.println("(initlocal, initremote, acceptlocal, acceptremote are boolean)");
182		}
183	0	}
184		}
185	0	else if((new String(buff, 0, ret_read)).startsWith("UNREGISTER"))
186		{
187	0	StringTokenizer st = new StringTokenizer(class="keyword">new String(buff));
188		try
189		{
190	0	st.nextToken();
191	0	int opcode = (new Integer(st.nextToken())).class="keyword">intValue();
192	0	tc.deleteOptionHandler(opcode);
193		}
194	0	catch (Exception e)
195		{
196	0	if(e instanceof InvalidTelnetOptionException)
197		{
198	0	System.err.println("Error unregistering option: " + e.getMessage());
199		}
200		else
201		{
202	0	System.err.println("Invalid UNREGISTER command.");
203	0	System.err.println("Use UNREGISTER optcode");
204	0	System.err.println("(optcode is an integer)");
205		}
206	0	}
207		}
208	0	else if((new String(buff, 0, ret_read)).startsWith("SPY"))
209		{
210		try
211		{
212	0	tc.registerSpyStream(fout);
213		}
214	0	catch (Exception e)
215		{
216	0	System.err.println("Error registering the spy");
217	0	}
218		}
219	0	else if((new String(buff, 0, ret_read)).startsWith("UNSPY"))
220		{
221	0	tc.stopSpyStream();
222		}
223		else
224		{
225		try
226		{
227	0	outstr.write(buff, 0 , ret_read);
228	0	outstr.flush();
229		}
230	0	catch (Exception e)
231		{
232	0	end_loop = true;
233	0	}
234		}
235		}
236		}
237	0	catch (Exception e)
238		{
239	0	System.err.println("Exception while reading keyboard:" + e.getMessage());
240	0	end_loop = true;
241	0	}
242		}
243	0	while((ret_read > 0) && (end_loop == false));
244
245		try
246		{
247	0	tc.disconnect();
248		}
249	0	catch (Exception e)
250		{
251	0	System.err.println("Exception while connecting:" + e.getMessage());
252	0	}
253		}
254	0	catch (Exception e)
255		{
256	0	System.err.println("Exception while connecting:" + e.getMessage());
257	0	System.exit(1);
258	0	}
259		}
260		}
261
262
263		/***
264		* Callback method called when TelnetClient receives an option
265		* negotiation command.
266		* <p>
267		* @param negotiation_code - type of negotiation command received
268		* (RECEIVED_DO, RECEIVED_DONT, RECEIVED_WILL, RECEIVED_WONT)
269		* <p>
270		* @param option_code - code of the option negotiated
271		* <p>
272		***/
273		public void receivedNegotiation(int negotiation_code, class="keyword">int option_code)
274		{
275	0	String command = null;
276	0	if(negotiation_code == TelnetNotclass="keyword">ificationHandler.RECEIVED_DO)
277		{
278	0	command = "DO";
279		}
280	0	else if(negotiation_code == TelnetNotclass="keyword">ificationHandler.RECEIVED_DONT)
281		{
282	0	command = "DONT";
283		}
284	0	else if(negotiation_code == TelnetNotclass="keyword">ificationHandler.RECEIVED_WILL)
285		{
286	0	command = "WILL";
287		}
288	0	else if(negotiation_code == TelnetNotclass="keyword">ificationHandler.RECEIVED_WONT)
289		{
290	0	command = "WONT";
291		}
292	0	System.out.println("Received " + command + " for option code " + option_code);
293	0	}
294
295		/***
296		* Reader thread.
297		* Reads lines from the TelnetClient and echoes them
298		* on the screen.
299		***/
300		public void run()
301		{
302	0	InputStream instr = tc.getInputStream();
303
304		try
305		{
306	0	byte[] buff = new byte[1024];
307	0	int ret_read = 0;
308
309		do
310		{
311	0	ret_read = instr.read(buff);
312	0	if(ret_read > 0)
313		{
314	0	System.out.print(new String(buff, 0, ret_read));
315		}
316		}
317	0	while (ret_read >= 0);
318		}
319	0	catch (Exception e)
320		{
321	0	System.err.println("Exception while reading socket:" + e.getMessage());
322	0	}
323
324		try
325		{
326	0	tc.disconnect();
327		}
328	0	catch (Exception e)
329		{
330	0	System.err.println("Exception while closing telnet:" + e.getMessage());
331	0	}
332	0	}
333		}
334

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