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 */ 017 018 package org.apache.commons.net.telnet; 019 020 /*** 021 * Implements the telnet echo option RFC 857. 022 * <p> 023 * @author Bruno D'Avanzo 024 ***/ 025 public class EchoOptionHandler extends TelnetOptionHandler 026 { 027 /*** 028 * Constructor for the EchoOptionHandler. 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 EchoOptionHandler(boolean initlocal, boolean initremote, 039 boolean acceptlocal, boolean acceptremote) 040 { 041 super(TelnetOption.ECHO, initlocal, initremote, 042 acceptlocal, acceptremote); 043 } 044 045 /*** 046 * Constructor for the EchoOptionHandler. Initial and accept 047 * behaviour flags are set to false 048 ***/ 049 public EchoOptionHandler() 050 { 051 super(TelnetOption.ECHO, 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[], 064 int suboptionLength) 065 { 066 return null; 067 } 068 069 /*** 070 * Implements the abstract method of TelnetOptionHandler. 071 * <p> 072 * @return always null (no response to subnegotiation) 073 ***/ 074 @Override 075 public int[] startSubnegotiationLocal() 076 { 077 return null; 078 } 079 080 /*** 081 * Implements the abstract method of TelnetOptionHandler. 082 * <p> 083 * @return always null (no response to subnegotiation) 084 ***/ 085 @Override 086 public int[] startSubnegotiationRemote() 087 { 088 return null; 089 } 090 }