Mercurial > 510Connectbot
annotate src/com/five_ten_sg/connectbot/service/Relay.java @ 347:bb7d8a7babbe
compensate for SecureRandom bug on older devices
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Thu, 31 Jul 2014 18:57:57 -0700 |
| parents | 766176d84e73 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * ConnectBot: simple, powerful, open-source SSH client for Android | |
| 3 * Copyright 2007 Kenny Root, Jeffrey Sharkey | |
| 4 * | |
| 5 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 * you may not use this file except in compliance with the License. | |
| 7 * 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 com.five_ten_sg.connectbot.service; | |
| 19 | |
| 20 import java.io.IOException; | |
| 21 import java.nio.ByteBuffer; | |
| 22 import java.nio.CharBuffer; | |
| 23 import java.nio.charset.Charset; | |
| 24 import java.nio.charset.CharsetDecoder; | |
| 25 import java.nio.charset.CoderResult; | |
| 26 import java.nio.charset.CodingErrorAction; | |
|
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27 import java.util.Timer; |
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28 import java.util.TimerTask; |
| 0 | 29 |
| 30 import org.apache.harmony.niochar.charset.additional.IBM437; | |
| 31 | |
| 32 import com.five_ten_sg.connectbot.transport.AbsTransport; | |
| 33 import android.graphics.Paint; | |
| 34 import android.text.AndroidCharacter; | |
| 35 import android.util.Log; | |
| 36 import de.mud.terminal.vt320; | |
| 37 | |
| 38 /** | |
| 39 * @author Kenny Root | |
| 40 */ | |
| 41 public class Relay implements Runnable { | |
| 42 private static final String TAG = "ConnectBot.Relay"; | |
| 43 | |
| 44 private static final int BUFFER_SIZE = 4096; | |
| 45 | |
| 46 private TerminalBridge bridge; | |
| 47 | |
| 48 private Charset currentCharset; | |
| 49 private CharsetDecoder decoder; | |
| 50 | |
| 51 private AbsTransport transport; | |
| 52 | |
| 53 private vt320 buffer; | |
| 54 | |
| 55 private ByteBuffer byteBuffer; | |
| 56 private CharBuffer charBuffer; | |
| 57 | |
| 58 private byte[] byteArray; | |
| 59 private char[] charArray; | |
| 60 | |
| 61 private void eastAsianWidthMeasure(char[] charArray, int start, int end, | |
| 62 byte[] wideAttribute, Paint paint, int charWidth) { | |
| 63 AndroidCharacter.getEastAsianWidths(charArray, start, end - start, wideAttribute); | |
| 64 } | |
| 65 | |
| 66 public Relay(TerminalBridge bridge, AbsTransport transport, vt320 buffer, String encoding) { | |
| 67 setCharset(encoding); | |
| 68 this.bridge = bridge; | |
| 69 this.transport = transport; | |
| 70 this.buffer = buffer; | |
| 71 } | |
| 72 | |
| 73 public void setCharset(String encoding) { | |
| 74 Log.d("ConnectBot.Relay", "changing charset to " + encoding); | |
| 75 Charset charset; | |
| 76 | |
| 77 if (encoding.equals("CP437")) | |
| 78 charset = new IBM437("IBM437", | |
| 79 new String[] { "IBM437", "CP437" }); | |
| 80 else | |
| 81 charset = Charset.forName(encoding); | |
| 82 | |
| 83 if (charset == currentCharset || charset == null) | |
| 84 return; | |
| 85 | |
| 86 CharsetDecoder newCd = charset.newDecoder(); | |
| 87 newCd.onUnmappableCharacter(CodingErrorAction.REPLACE); | |
| 88 newCd.onMalformedInput(CodingErrorAction.REPLACE); | |
| 89 currentCharset = charset; | |
| 90 | |
| 91 synchronized (this) { | |
| 92 decoder = newCd; | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 public Charset getCharset() { | |
| 97 return currentCharset; | |
| 98 } | |
| 99 | |
| 100 public void run() { | |
| 101 byteBuffer = ByteBuffer.allocate(BUFFER_SIZE); | |
| 102 charBuffer = CharBuffer.allocate(BUFFER_SIZE); | |
| 103 /* for East Asian character widths */ | |
| 104 byte[] wideAttribute = new byte[BUFFER_SIZE]; | |
| 105 byteArray = byteBuffer.array(); | |
| 106 charArray = charBuffer.array(); | |
| 107 CoderResult result; | |
| 108 int bytesRead = 0; | |
| 109 byteBuffer.limit(0); | |
| 110 int bytesToRead; | |
| 111 int offset; | |
| 112 int charWidth; | |
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113 Timer timer = new Timer("relay.blocker", true); |
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114 TimerTask task = null; |
| 0 | 115 |
| 116 try { | |
| 117 while (true) { | |
| 118 charWidth = bridge.charWidth; | |
| 119 bytesToRead = byteBuffer.capacity() - byteBuffer.limit(); | |
| 120 offset = byteBuffer.arrayOffset() + byteBuffer.limit(); | |
| 112 | 121 |
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122 if (transport.willBlock()) { |
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123 task = new TimerTask() { |
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124 public void run() { |
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125 buffer.testChanged(); |
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126 } |
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127 }; |
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128 timer.schedule(task, 10); // 10 ms delay |
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129 } |
| 112 | 130 |
| 0 | 131 bytesRead = transport.read(byteArray, offset, bytesToRead); |
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132 |
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133 if (task != null) { |
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134 task.cancel(); |
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135 task = null; |
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136 } |
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parents:
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137 |
| 0 | 138 if (bytesRead > 0) { |
| 139 byteBuffer.limit(byteBuffer.limit() + bytesRead); | |
| 140 | |
| 141 synchronized (this) { | |
| 142 result = decoder.decode(byteBuffer, charBuffer, false); | |
| 143 } | |
| 144 | |
| 145 if (result.isUnderflow() && | |
| 146 byteBuffer.limit() == byteBuffer.capacity()) { | |
| 147 byteBuffer.compact(); | |
| 148 byteBuffer.limit(byteBuffer.position()); | |
| 149 byteBuffer.position(0); | |
| 150 } | |
| 151 | |
| 152 offset = charBuffer.position(); | |
| 153 eastAsianWidthMeasure(charArray, 0, offset, wideAttribute, bridge.defaultPaint, charWidth); | |
| 154 buffer.putString(charArray, wideAttribute, 0, charBuffer.position()); | |
| 155 bridge.propagateConsoleText(charArray, charBuffer.position()); | |
| 156 charBuffer.clear(); | |
| 157 bridge.redraw(); | |
| 158 } | |
| 159 } | |
| 160 } | |
| 161 catch (IOException e) { | |
| 162 Log.e(TAG, "Problem while handling incoming data in relay thread", e); | |
| 163 } | |
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2dd627df4dfb
delay testChanged() by 10ms for async transports; sendScreen resets watch area to the entire screen
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parents:
112
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164 |
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2dd627df4dfb
delay testChanged() by 10ms for async transports; sendScreen resets watch area to the entire screen
Carl Byington <carl@five-ten-sg.com>
parents:
112
diff
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165 timer.cancel(); |
| 0 | 166 } |
| 167 } |