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1 package org.apache.commons.net.telnet; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Commons" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 /**** 58 * The TelnetOption class cannot be instantiated and only serves as a 59 * storehouse for telnet option constants. 60 * <p> 61 * Details regarding Telnet option specification can be found in RFC 855. 62 * <p> 63 * <p> 64 * @author Daniel F. Savarese 65 * @see org.apache.commons.net.telnet.Telnet 66 * @see org.apache.commons.net.telnet.TelnetClient 67 ***/ 68 69 public class TelnetOption 70 { 71 /**** The maximum value an option code can have. This value is 255. ***/ 72 public static final int MAX_OPTION_VALUE = 255; 73 74 public static int BINARY = 0; 75 76 public static int ECHO = 1; 77 78 public static int PREPARE_TO_RECONNECT = 2; 79 80 public static int SUPPRESS_GO_AHEAD = 3; 81 82 public static int APPROXIMATE_MESSAGE_SIZE = 4; 83 84 public static int STATUS = 5; 85 86 public static int TIMING_MARK = 6; 87 88 public static int REMOTE_CONTROLLED_TRANSMISSION = 7; 89 90 public static int NEGOTIATE_OUTPUT_LINE_WIDTH = 8; 91 92 public static int NEGOTIATE_OUTPUT_PAGE_SIZE = 9; 93 94 public static int NEGOTIATE_CARRIAGE_RETURN = 10; 95 96 public static int NEGOTIATE_HORIZONTAL_TAB_STOP = 11; 97 98 public static int NEGOTIATE_HORIZONTAL_TAB = 12; 99 100 public static int NEGOTIATE_FORMFEED = 13; 101 102 public static int NEGOTIATE_VERTICAL_TAB_STOP = 14; 103 104 public static int NEGOTIATE_VERTICAL_TAB = 15; 105 106 public static int NEGOTIATE_LINEFEED = 16; 107 108 public static int EXTENDED_ASCII = 17; 109 110 public static int FORCE_LOGOUT = 18; 111 112 public static int BYTE_MACRO = 19; 113 114 public static int DATA_ENTRY_TERMINAL = 20; 115 116 public static int SUPDUP = 21; 117 118 public static int SUPDUP_OUTPUT = 22; 119 120 public static int SEND_LOCATION = 23; 121 122 public static int TERMINAL_TYPE = 24; 123 124 public static int END_OF_RECORD = 25; 125 126 public static int TACACS_USER_IDENTIFICATION = 26; 127 128 public static int OUTPUT_MARKING = 27; 129 130 public static int TERMINAL_LOCATION_NUMBER = 28; 131 132 public static int REGIME_3270 = 29; 133 134 public static int X3_PAD = 30; 135 136 public static int WINDOW_SIZE = 31; 137 138 public static int TERMINAL_SPEED = 32; 139 140 public static int REMOTE_FLOW_CONTROL = 33; 141 142 public static int LINEMODE = 34; 143 144 public static int X_DISPLAY_LOCATION = 35; 145 146 public static int OLD_ENVIRONMENT_VARIABLES = 36; 147 148 public static int AUTHENTICATION = 37; 149 150 public static int ENCRYPTION = 38; 151 152 public static int NEW_ENVIRONMENT_VARIABLES = 39; 153 154 public static int EXTENDED_OPTIONS_LIST = 255; 155 156 private static int __FIRST_OPTION = BINARY; 157 private static int __LAST_OPTION = NEW_ENVIRONMENT_VARIABLES; 158 159 private static final String __optionString[] = { 160 "BINARY", "ECHO", "RCP", "SUPPRESS GO AHEAD", "NAME", "STATUS", 161 "TIMING MARK", "RCTE", "NAOL", "NAOP", "NAOCRD", "NAOHTS", "NAOHTD", 162 "NAOFFD", "NAOVTS", "NAOVTD", "NAOLFD", "EXTEND ASCII", "LOGOUT", 163 "BYTE MACRO", "DATA ENTRY TERMINAL", "SUPDUP", "SUPDUP OUTPUT", 164 "SEND LOCATION", "TERMINAL TYPE", "END OF RECORD", "TACACS UID", 165 "OUTPUT MARKING", "TTYLOC", "3270 REGIME", "X.3 PAD", "NAWS", "TSPEED", 166 "LFLOW", "LINEMODE", "XDISPLOC", "OLD-ENVIRON", "AUTHENTICATION", 167 "ENCRYPT", "NEW-ENVIRON" 168 }; 169 170 171 /**** 172 * Returns the string representation of the telnet protocol option 173 * corresponding to the given option code. 174 * <p> 175 * @param The option code of the telnet protocol option 176 * @return The string representation of the telnet protocol option. 177 ***/ 178 public static final String getOption(int code) 179 { 180 return __optionString[code]; 181 } 182 183 184 /**** 185 * Determines if a given option code is valid. Returns true if valid, 186 * false if not. 187 * <p> 188 * @param code The option code to test. 189 * @return True if the option code is valid, false if not. 190 **/ 191 public static final boolean isValidOption(int code) 192 { 193 return (code <= __LAST_OPTION); 194 } 195 196 // Cannot be instantiated 197 private TelnetOption() 198 { } 199 }

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