001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.net.telnet;
019
020/***
021 * Implements the telnet suppress go ahead option RFC 858.
022 * <p>
023 * @author Bruno D'Avanzo
024 ***/
025public class SuppressGAOptionHandler extends TelnetOptionHandler
026{
027    /***
028     * Constructor for the SuppressGAOptionHandler. Allows defining desired
029     * initial setting for local/remote activation of this option and
030     * behaviour in case a local/remote activation request for this
031     * option is received.
032     * <p>
033     * @param initlocal - if set to true, a WILL is sent upon connection.
034     * @param initremote - if set to true, a DO is sent upon connection.
035     * @param acceptlocal - if set to true, any DO request is accepted.
036     * @param acceptremote - if set to true, any WILL request is accepted.
037     ***/
038    public SuppressGAOptionHandler(boolean initlocal, boolean initremote,
039                                boolean acceptlocal, boolean acceptremote)
040    {
041        super(TelnetOption.SUPPRESS_GO_AHEAD, initlocal, initremote,
042                                      acceptlocal, acceptremote);
043    }
044
045    /***
046     * Constructor for the SuppressGAOptionHandler. Initial and accept
047     * behaviour flags are set to false
048     ***/
049    public SuppressGAOptionHandler()
050    {
051        super(TelnetOption.SUPPRESS_GO_AHEAD, false, false, false, false);
052    }
053
054    /***
055     * Implements the abstract method of TelnetOptionHandler.
056     * <p>
057     * @param suboptionData - the sequence received, whithout IAC SB & IAC SE
058     * @param suboptionLength - the length of data in suboption_data
059     * <p>
060     * @return always null (no response to subnegotiation)
061     ***/
062    @Override
063    public int[] answerSubnegotiation(int suboptionData[], int suboptionLength)
064    {
065        return null;
066    }
067
068    /***
069     * Implements the abstract method of TelnetOptionHandler.
070     * <p>
071     * @return always null (no response to subnegotiation)
072     ***/
073    @Override
074    public int[] startSubnegotiationLocal()
075    {
076        return null;
077    }
078
079    /***
080     * Implements the abstract method of TelnetOptionHandler.
081     * <p>
082     * @return always null (no response to subnegotiation)
083     ***/
084    @Override
085    public int[] startSubnegotiationRemote()
086    {
087        return null;
088    }
089}