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
18 package org.apache.commons.net.telnet;
19
20 /***
21 * Implements the telnet echo option RFC 857.
22 * <p>
23 * @author Bruno D'Avanzo
24 ***/
25 public class EchoOptionHandler extends TelnetOptionHandler
26 {
27 /***
28 * Constructor for the EchoOptionHandler. Allows defining desired
29 * initial setting for local/remote activation of this option and
30 * behaviour in case a local/remote activation request for this
31 * option is received.
32 * <p>
33 * @param initlocal - if set to true, a WILL is sent upon connection.
34 * @param initremote - if set to true, a DO is sent upon connection.
35 * @param acceptlocal - if set to true, any DO request is accepted.
36 * @param acceptremote - if set to true, any WILL request is accepted.
37 ***/
38 public EchoOptionHandler(boolean initlocal, boolean initremote,
39 boolean acceptlocal, boolean acceptremote)
40 {
41 super(TelnetOption.ECHO, initlocal, initremote,
42 acceptlocal, acceptremote);
43 }
44
45 /***
46 * Constructor for the EchoOptionHandler. Initial and accept
47 * behaviour flags are set to false
48 ***/
49 public EchoOptionHandler()
50 {
51 super(TelnetOption.ECHO, false, false, false, false);
52 }
53
54 /***
55 * Implements the abstract method of TelnetOptionHandler.
56 * <p>
57 * @param suboptionData - the sequence received, whithout IAC SB & IAC SE
58 * @param suboptionLength - the length of data in suboption_data
59 * <p>
60 * @return always null (no response to subnegotiation)
61 ***/
62 @Override
63 public int[] answerSubnegotiation(int suboptionData[],
64 int suboptionLength)
65 {
66 return null;
67 }
68
69 /***
70 * Implements the abstract method of TelnetOptionHandler.
71 * <p>
72 * @return always null (no response to subnegotiation)
73 ***/
74 @Override
75 public int[] startSubnegotiationLocal()
76 {
77 return null;
78 }
79
80 /***
81 * Implements the abstract method of TelnetOptionHandler.
82 * <p>
83 * @return always null (no response to subnegotiation)
84 ***/
85 @Override
86 public int[] startSubnegotiationRemote()
87 {
88 return null;
89 }
90 }