annotate src/org/tn5250j/framework/tn5250/DataStreamProducer.java @ 417:4dcc071e1feb

monitor failure should not kill the TE
author Carl Byington <carl@five-ten-sg.com>
date Wed, 29 Oct 2014 12:12:48 -0700
parents 24186858750f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package org.tn5250j.framework.tn5250;
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2
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3 import java.io.BufferedInputStream;
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4 import java.io.BufferedOutputStream;
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5 import java.io.ByteArrayOutputStream;
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6 import java.io.EOFException;
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7 import java.io.FileNotFoundException;
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8 import java.io.FileOutputStream;
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9 import java.io.IOException;
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10 import java.net.SocketException;
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11 import java.util.concurrent.BlockingQueue;
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12 import java.util.Timer;
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13 import java.util.TimerTask;
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15 import org.tn5250j.encoding.ICodePage;
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17 import android.util.Log;
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20 public class DataStreamProducer implements Runnable {
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21 private static final String TAG = "DataStreamProducer";
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22 private tnvt vt;
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23 private BufferedInputStream bin;
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24 private ByteArrayOutputStream baosin;
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25 private Thread me;
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26 private byte[] saveStream;
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27 private final BlockingQueue<Object> dsq;
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28 private byte[] abyte2;
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29 private FileOutputStream fw;
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30 private BufferedOutputStream dw;
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31 private boolean dumpBytes = false;
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32 private ICodePage codePage;
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36 public DataStreamProducer(tnvt vt, BufferedInputStream bin, BlockingQueue<Object> queue, byte[] init) {
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37 this.bin = bin;
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38 this.vt = vt;
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39 baosin = new ByteArrayOutputStream();
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40 dsq = queue;
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41 abyte2 = init;
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42 }
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44 public void setInputStream(ByteArrayOutputStream is) {
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45 baosin = is;
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46 }
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48 public final void run() {
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49 boolean done = false;
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50 me = Thread.currentThread();
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51 // load the first response screen
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52 loadStream(abyte2, 0);
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54 while (!done) {
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55 try {
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56 byte[] abyte0 = readIncoming();
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58 // WVL - LDC : 17/05/2004 : Device name negotiations send TIMING MARK
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59 // Restructured to the readIncoming() method to return null
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60 // on TIMING MARK. Don't process in that case (abyte0 == null)!
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61 if (abyte0 != null) {
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62 // WVL - LDC : 16/07/2003 : TR.000345
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63 // When the socket has been closed, the reading returns
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64 // no bytes (an empty byte arrray).
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65 // But the loadStream fails on this, so we check it here!
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66 if (abyte0.length > 0) {
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67 loadStream(abyte0, 0);
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68 }
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69 // WVL - LDC : 16/07/2003 : TR.000345
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70 // Returning no bytes means the input buffer has
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71 // reached end-of-stream, so we do a disconnect!
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72 else {
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73 done = true;
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74 vt.disconnect();
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75 }
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76 }
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77 }
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78 catch (SocketException se) {
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79 Log.w(TAG, " DataStreamProducer thread interrupted and stopping " + se.getMessage());
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80 done = true;
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81 }
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82 catch (IOException ioe) {
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83 Log.w(TAG, ioe.getMessage());
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85 if (me.isInterrupted())
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86 done = true;
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87 }
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88 catch (Exception ex) {
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89 Log.w(TAG, ex.getMessage());
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91 if (me.isInterrupted())
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92 done = true;
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93 }
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94 }
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95 }
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96
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97 private final void loadStream(byte abyte0[], int i) {
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98 int j = 0;
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99 int size = 0;
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101 if (saveStream == null) {
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102 j = (abyte0[i] & 0xff) << 8 | abyte0[i + 1] & 0xff;
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103 size = abyte0.length;
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104 }
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105 else {
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106 size = saveStream.length + abyte0.length;
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107 byte[] inter = new byte[size];
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108 System.arraycopy(saveStream, 0, inter, 0, saveStream.length);
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109 System.arraycopy(abyte0, 0, inter, saveStream.length, abyte0.length);
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110 abyte0 = new byte[size];
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111 System.arraycopy(inter, 0, abyte0, 0, size);
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112 saveStream = null;
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113 inter = null;
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114 j = (abyte0[i] & 0xff) << 8 | abyte0[i + 1] & 0xff;
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115 Log.d(TAG, "partial stream found");
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116 }
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117
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118 if (j > size) {
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119 saveStream = new byte[abyte0.length];
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120 System.arraycopy(abyte0, 0, saveStream, 0, abyte0.length);
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121 Log.d(TAG, "partial stream saved");
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122 }
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123 else {
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124 byte abyte1[];
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125
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126 try {
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127 abyte1 = new byte[j + 2];
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128 System.arraycopy(abyte0, i, abyte1, 0, j + 2);
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129 dsq.put(abyte1);
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131 if (abyte0.length > abyte1.length + i)
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132 loadStream(abyte0, i + j + 2);
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133 }
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134 catch (Exception ex) {
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135 Log.w(TAG, "load stream error " + ex.getMessage());
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136 // ex.printStackTrace();
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137 // dump(abyte0);
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138 }
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139 }
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140 }
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141
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142 public final byte[] readIncoming()
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143 throws IOException {
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144 boolean done = false;
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145 boolean negotiate = false;
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146 baosin.reset();
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147 int j = -1;
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148 int i = 0;
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149 Timer timer = new Timer("data.stream", true);
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150 TimerTask task = null;
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152 while (!done) {
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153 if (bin.available() == 0) {
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154 task = new TimerTask() {
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155 public void run() {
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156 try {
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157 dsq.put(new Integer(0)); // trigger buffer.testChanged()
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158 }
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159 catch (Exception ex) {
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160 Log.w(TAG, "readIncoming error " + ex.getMessage());
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161 }
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162 }
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163 };
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164 timer.schedule(task, 10); // 10 ms delay
392
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165 }
394
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166
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167 i = bin.read();
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168
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169 if (task != null) {
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170 task.cancel();
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171 task = null;
392
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172 }
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173
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174 // WVL - LDC : 16/07/2003 : TR.000345
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175 // The inStream return -1 when end-of-stream is reached. This
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176 // happens e.g. when the connection is closed from the AS/400.
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177 // So we stop in this case!
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178 // ==> an empty byte array is returned from this method.
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179 if (i == -1) { // nothing read!
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180 done = true;
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181 vt.disconnect();
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182 continue;
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183 }
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184
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185 // We use the values instead of the static values IAC and EOR
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186 // because they are defined as bytes.
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187 //
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188 // The > if(i != 255 || j != 255) < is a hack for the double FF FF's
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189 // that are being returned. I do not know why this is like this and
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190 // can not find any documentation for it. It is also being returned
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191 // on my Client Access tcp dump as well so they are handling it.
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192 //
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193 // my5250
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194 // 0000: 00 50 DA 44 C8 45 42 00 00 00 00 24 08 00 45 00 .P.D.EB....$..E.
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195 // 0010: 04 2A BC F9 00 00 40 06 D0 27 C1 A8 33 04 C1 A8 .*....@..'..3...
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196 // 0020: 33 58 00 17 04 18 6F A2 83 CB 00 1E D1 BA 50 18 3X....o.......P.
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197 // 0030: 20 00 8A 9A 00 00 03 FF FF 12 A0 00 00 04 00 00 ...............
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198 // --------------------------- || || -------------------------------------
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199 // 0040: 03 04 40 04 11 00 20 01 07 00 00 00 18 00 00 10 ..@... .........
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200
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201 if (j == 255 && i == 255) {
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202 j = -1;
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203 continue;
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204 }
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205
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206 baosin.write(i);
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207
112
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208 // check for end of record EOR and IAC - FFEF
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209 if (j == 255 && i == 239)
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210 done = true;
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211
112
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212 // This is to check for the TELNET TIMING MARK OPTION
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213 // rfc860 explains this in more detail. When we receive it
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214 // we will negotiate with the server by sending a WONT'T TIMING-MARK
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215 // This will let the server know that we processed the information
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216 // and are just waiting for the user to enter some data so keep the
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217 // socket alive. This is more or less a AYT (ARE YOU THERE) or not.
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218 if (i == 253 && j == 255) {
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219 done = true;
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220 negotiate = true;
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221 }
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222
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223 j = i;
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224 }
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225
112
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226 // after the initial negotiation we might get other options such as
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227 // timing marks ?????????????? do we ???????????? look at telnet spec
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228 // yes we do. rfc860 explains about timing marks.
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229 // WVL - LDC : 17/05/2004 : Device name negotiations send TIMING MARK
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230 // to existing device!
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231 // Handled incorrectly: we cannot continue processing the TIMING MARK DO
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232 // after we have handled it in the vt.negotiate()
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233 // We should not return the bytes;
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234 // ==> restructured to return null after negotiation!
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235 // Impacts the run method! Added the null check.
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236 byte[] rBytes = baosin.toByteArray();
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237
112
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238 if (dumpBytes) {
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239 dump(rBytes);
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240 }
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241
112
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242 if (negotiate) {
394
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diff changeset
243 if (bin.available() == 0) {
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diff changeset
244 task = new TimerTask() {
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245 public void run() {
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246 try {
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247 dsq.put(new Integer(0)); // trigger buffer.testChanged()
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248 }
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249 catch (Exception ex) {
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250 Log.w(TAG, "readIncoming error " + ex.getMessage());
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251 }
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252 }
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253 };
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254 timer.schedule(task, 10); // 10 ms delay
392
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diff changeset
255 }
394
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diff changeset
256
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257 // get the negotiation option
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258 baosin.write(bin.read());
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diff changeset
259
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diff changeset
260 if (task != null) {
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261 task.cancel();
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262 task = null;
392
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diff changeset
263 }
394
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diff changeset
264
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265 vt.negotiate(rBytes);
112
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266 return null;
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diff changeset
267 }
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268
112
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diff changeset
269 return rBytes;
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diff changeset
270 }
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271
112
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diff changeset
272 protected final void toggleDebug(ICodePage cp) {
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273 if (codePage == null)
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274 codePage = cp;
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275
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diff changeset
276 dumpBytes = !dumpBytes;
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277
112
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diff changeset
278 if (dumpBytes) {
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diff changeset
279 try {
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diff changeset
280 if (fw == null) {
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281 fw = new FileOutputStream("log.txt");
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282 dw = new BufferedOutputStream(fw);
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diff changeset
283 }
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284 }
112
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diff changeset
285 catch (FileNotFoundException fnfe) {
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diff changeset
286 Log.w(TAG, fnfe.getMessage());
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diff changeset
287 }
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288 }
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289 else {
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diff changeset
290 try {
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291 if (dw != null)
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diff changeset
292 dw.close();
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293
112
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diff changeset
294 if (fw != null)
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diff changeset
295 fw.close();
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diff changeset
296
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diff changeset
297 dw = null;
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diff changeset
298 fw = null;
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diff changeset
299 codePage = null;
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diff changeset
300 }
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diff changeset
301 catch (IOException ioe) {
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diff changeset
302 Log.w(TAG, ioe.getMessage());
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diff changeset
303 }
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diff changeset
304 }
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305
112
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diff changeset
306 Log.i(TAG, "Data Stream output is now " + dumpBytes);
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307 }
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308
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309 public void dump(byte[] abyte0) {
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310 try {
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311 Log.i(TAG, "\n Buffer Dump of data from AS400: ");
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312 dw.write("\r\n Buffer Dump of data from AS400: ".getBytes());
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313 StringBuffer h = new StringBuffer();
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314
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315 for (int x = 0; x < abyte0.length; x++) {
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316 if (x % 16 == 0) {
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317 System.out.println(" " + h.toString());
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318 dw.write((" " + h.toString() + "\r\n").getBytes());
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319 h.setLength(0);
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320 h.append("+0000");
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321 h.setLength(5 - Integer.toHexString(x).length());
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322 h.append(Integer.toHexString(x).toUpperCase());
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323 System.out.print(h.toString());
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324 dw.write(h.toString().getBytes());
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325 h.setLength(0);
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326 }
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327
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328 char ac = codePage.ebcdic2uni(abyte0[x]);
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329
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330 if (ac < ' ')
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331 h.append('.');
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332 else
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333 h.append(ac);
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334
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335 if (x % 4 == 0) {
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336 System.out.print(" ");
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337 dw.write((" ").getBytes());
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338 }
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339
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340 if (Integer.toHexString(abyte0[x] & 0xff).length() == 1) {
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341 System.out.print("0" + Integer.toHexString(abyte0[x] & 0xff).toUpperCase());
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342 dw.write(("0" + Integer.toHexString(abyte0[x] & 0xff).toUpperCase()).getBytes());
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343 }
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344 else {
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345 System.out.print(Integer.toHexString(abyte0[x] & 0xff).toUpperCase());
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346 dw.write((Integer.toHexString(abyte0[x] & 0xff).toUpperCase()).getBytes());
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347 }
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348 }
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349
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350 System.out.println();
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351 dw.write("\r\n".getBytes());
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352 dw.flush();
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353 }
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354 catch (EOFException _ex) { }
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355 catch (Exception _ex) {
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356 Log.w(TAG, "Cannot dump from host\n\r");
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357 }
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358 }
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359
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360 // public void dumpBytes() {
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361 // byte shit[] = bk.buffer;
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362 // for (int i = 0;i < shit.length;i++)
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363 // System.out.println(i + ">" + shit[i] + "< - ascii - >" + getASCIIChar(shit[i]) + "<");
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364 // }
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365 //
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366 // public void dumpHexBytes(byte[] abyte) {
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367 // byte shit[] = abyte;
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368 // for (int i = 0;i < shit.length;i++)
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369 // System.out.println(i + ">" + shit[i] + "< hex >" + Integer.toHexString((shit[i] & 0xff)));
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370 // }
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371
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372 }