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org.apache.commons.net.telnet.TerminalTypeOptionHandler |
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1 | /* |
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2 | * Copyright 2003-2004 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.net.telnet; |
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17 | ||
18 | /*** |
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19 | * Implements the telnet terminal type option RFC 1091. |
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20 | * <p> |
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21 | * @author Bruno D'Avanzo |
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22 | ***/ |
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23 | public class TerminalTypeOptionHandler extends TelnetOptionHandler |
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24 | { |
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25 | /*** |
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26 | * Terminal type |
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27 | ***/ |
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28 | 23 | private String termType = null; |
29 | ||
30 | /*** |
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31 | * Terminal type option |
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32 | ***/ |
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33 | protected static final int TERMINAL_TYPE = 24; |
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34 | ||
35 | /*** |
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36 | * Send (for subnegotiation) |
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37 | ***/ |
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38 | protected static final int TERMINAL_TYPE_SEND = 1; |
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39 | ||
40 | /*** |
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41 | * Is (for subnegotiation) |
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42 | ***/ |
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43 | protected static final int TERMINAL_TYPE_IS = 0; |
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44 | ||
45 | /*** |
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46 | * Constructor for the TerminalTypeOptionHandler. Allows defining desired |
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47 | * initial setting for local/remote activation of this option and |
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48 | * behaviour in case a local/remote activation request for this |
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49 | * option is received. |
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50 | * <p> |
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51 | * @param termtype - terminal type that will be negotiated. |
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52 | * @param initlocal - if set to true, a WILL is sent upon connection. |
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53 | * @param initremote - if set to true, a DO is sent upon connection. |
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54 | * @param acceptlocal - if set to true, any DO request is accepted. |
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55 | * @param acceptremote - if set to true, any WILL request is accepted. |
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56 | ***/ |
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57 | public TerminalTypeOptionHandler(String termtype, |
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58 | boolean initlocal, |
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59 | boolean initremote, |
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60 | boolean acceptlocal, |
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61 | boolean acceptremote) |
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62 | { |
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63 | 18 | super(TelnetOption.TERMINAL_TYPE, initlocal, initremote, |
64 | acceptlocal, acceptremote); |
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65 | 18 | termType = termtype; |
66 | 18 | } |
67 | ||
68 | /*** |
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69 | * Constructor for the TerminalTypeOptionHandler. Initial and accept |
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70 | * behaviour flags are set to false |
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71 | * <p> |
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72 | * @param termtype - terminal type that will be negotiated. |
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73 | ***/ |
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74 | public TerminalTypeOptionHandler(String termtype) |
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75 | { |
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76 | 5 | super(TelnetOption.TERMINAL_TYPE, false, false, false, false); |
77 | 5 | termType = termtype; |
78 | 5 | } |
79 | ||
80 | /*** |
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81 | * Implements the abstract method of TelnetOptionHandler. |
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82 | * <p> |
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83 | * @param suboptionData - the sequence received, whithout IAC SB & IAC SE |
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84 | * @param suboptionLength - the length of data in suboption_data |
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85 | * <p> |
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86 | * @return terminal type information |
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87 | ***/ |
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88 | public int[] answerSubnegotiation(class="keyword">int suboptionData[], class="keyword">int suboptionLength) |
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89 | { |
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90 | 3 | if ((suboptionData != null) && (suboptionLength > 1) |
91 | && (termType != null)) |
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92 | { |
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93 | 3 | if ((suboptionData[0] == TERMINAL_TYPE) |
94 | && (suboptionData[1] == TERMINAL_TYPE_SEND)) |
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95 | { |
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96 | 3 | int response[] = new class="keyword">int[termType.length() + 2]; |
97 | ||
98 | 3 | response[0] = TERMINAL_TYPE; |
99 | 3 | response[1] = TERMINAL_TYPE_IS; |
100 | ||
101 | 17 | for (int ii = 0; ii < termType.length(); ii++) |
102 | { |
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103 | 14 | response[ii + 2] = (int) termType.charAt(ii); |
104 | } |
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105 | ||
106 | 3 | return response; |
107 | } |
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108 | } |
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109 | 0 | return null; |
110 | } |
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111 | ||
112 | /*** |
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113 | * Implements the abstract method of TelnetOptionHandler. |
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114 | * <p> |
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115 | * @return always null (no response to subnegotiation) |
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116 | ***/ |
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117 | public int[] startSubnegotiationLocal() |
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118 | { |
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119 | 3 | return null; |
120 | } |
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121 | ||
122 | /*** |
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123 | * Implements the abstract method of TelnetOptionHandler. |
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124 | * <p> |
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125 | * @return always null (no response to subnegotiation) |
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126 | ***/ |
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127 | public int[] startSubnegotiationRemote() |
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128 | { |
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129 | 1 | return null; |
130 | } |
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131 | } |
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