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1 // Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC.
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2 // All rights reserved.
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3 //
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4 //-------------------------------------------------------------------------
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5 // This file is part of the TightVNC software. Please visit our Web site:
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6 //
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7 // http://www.tightvnc.com/
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8 //
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9 // This program is free software; you can redistribute it and/or modify
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10 // it under the terms of the GNU General Public License as published by
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11 // the Free Software Foundation; either version 2 of the License, or
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12 // (at your option) any later version.
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13 //
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14 // This program is distributed in the hope that it will be useful,
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15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 // GNU General Public License for more details.
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18 //
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19 // You should have received a copy of the GNU General Public License along
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20 // with this program; if not, write to the Free Software Foundation, Inc.,
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21 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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22 //-------------------------------------------------------------------------
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23 //
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24
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25 package com.glavsoft.rfb.protocol;
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26
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27 import com.glavsoft.drawing.Renderer;
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28 import com.glavsoft.exceptions.CommonException;
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29 import com.glavsoft.exceptions.ProtocolException;
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30 import com.glavsoft.exceptions.TransportException;
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31 import com.glavsoft.rfb.ClipboardController;
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32 import com.glavsoft.rfb.IRepaintController;
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33 import com.glavsoft.rfb.client.FramebufferUpdateRequestMessage;
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34 import com.glavsoft.rfb.client.SetPixelFormatMessage;
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35 import com.glavsoft.rfb.encoding.EncodingType;
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36 import com.glavsoft.rfb.encoding.PixelFormat;
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37 import com.glavsoft.rfb.encoding.decoder.Decoder;
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38 import com.glavsoft.rfb.encoding.decoder.DecodersContainer;
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39 import com.glavsoft.rfb.encoding.decoder.FramebufferUpdateRectangle;
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40 import com.glavsoft.rfb.encoding.decoder.RichCursorDecoder;
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41 import com.glavsoft.transport.Reader;
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42
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43 import java.io.PrintWriter;
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44 import java.io.StringWriter;
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45 import java.util.logging.Logger;
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46
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47 public class ReceiverTask implements Runnable {
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48 private static final byte FRAMEBUFFER_UPDATE = 0;
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49 private static final byte SET_COLOR_MAP_ENTRIES = 1;
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50 private static final byte BELL = 2;
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51 private static final byte SERVER_CUT_TEXT = 3;
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52
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53
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54 private static Logger logger = Logger.getLogger("com.glavsoft.rfb.protocol.ReceiverTask");
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55 private final Reader reader;
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56 private volatile boolean isRunning = false;
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57 private Renderer renderer;
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58 private final IRepaintController repaintController;
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59 private final ClipboardController clipboardController;
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60 private final DecodersContainer decoders;
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61 private FramebufferUpdateRequestMessage fullscreenFbUpdateIncrementalRequest;
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62 private final ProtocolContext context;
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63 private PixelFormat pixelFormat;
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64 private boolean needSendPixelFormat;
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65
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66 public ReceiverTask(Reader reader,
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67 IRepaintController repaintController, ClipboardController clipboardController,
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68 DecodersContainer decoders, ProtocolContext context) {
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69 this.reader = reader;
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70 this.repaintController = repaintController;
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71 this.clipboardController = clipboardController;
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72 this.context = context;
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73 this.decoders = decoders;
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74 renderer = repaintController.createRenderer(reader, context.getFbWidth(), context.getFbHeight(),
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75 context.getPixelFormat());
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76 fullscreenFbUpdateIncrementalRequest =
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77 new FramebufferUpdateRequestMessage(0, 0, context.getFbWidth(), context.getFbHeight(), true);
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78 }
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79
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80 @Override
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81 public void run() {
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82 isRunning = true;
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83 while (isRunning) {
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84 try {
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85 byte messageId = reader.readByte();
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86 switch (messageId) {
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87 case FRAMEBUFFER_UPDATE:
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88 // logger.fine("Server message: FramebufferUpdate (0)");
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89 framebufferUpdateMessage();
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90 break;
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91 case SET_COLOR_MAP_ENTRIES:
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92 logger.severe("Server message SetColorMapEntries is not implemented. Skip.");
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93 setColorMapEntries();
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94 break;
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95 case BELL:
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96 logger.fine("Server message: Bell");
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97 System.out.print("\0007");
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98 System.out.flush();
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99 break;
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100 case SERVER_CUT_TEXT:
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101 logger.fine("Server message: CutText (3)");
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102 serverCutText();
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103 break;
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104 default:
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105 logger.severe("Unsupported server message. Id = " + messageId);
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106 }
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107 } catch (TransportException e) {
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108 if (isRunning) {
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109 logger.severe("Close session: " + e.getMessage());
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110 context.cleanUpSession("Connection closed.");
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111 }
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112 stopTask();
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113 } catch (ProtocolException e) {
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114 logger.severe(e.getMessage());
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115 if (isRunning) {
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116 context.cleanUpSession(e.getMessage() + "\nConnection closed.");
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117 }
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118 stopTask();
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119 } catch (CommonException e) {
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120 logger.severe(e.getMessage());
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121 if (isRunning) {
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122 context.cleanUpSession("Connection closed..");
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123 }
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124 stopTask();
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125 } catch (Throwable te) {
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126 StringWriter sw = new StringWriter();
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127 PrintWriter pw = new PrintWriter(sw);
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128 te.printStackTrace(pw);
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129 if (isRunning) {
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130 context.cleanUpSession(te.getMessage() + "\n" + sw.toString());
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131 }
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132 stopTask();
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133 }
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134 }
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135 }
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136
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137 private void setColorMapEntries() throws TransportException {
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138 reader.readByte(); // padding
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139 reader.readUInt16(); // first color index
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140 int length = reader.readUInt16();
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141 while (length-- > 0) {
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142 reader.readUInt16(); // R
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143 reader.readUInt16(); // G
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144 reader.readUInt16(); // B
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145 }
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146 }
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147
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148 private void serverCutText() throws TransportException {
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149 reader.readByte(); // padding
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150 reader.readInt16(); // padding
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151 int length = reader.readInt32() & Integer.MAX_VALUE;
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152 clipboardController.updateSystemClipboard(reader.readBytes(length));
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153 }
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154
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155 public void framebufferUpdateMessage() throws CommonException {
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156 reader.readByte(); // padding
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157 int numberOfRectangles = reader.readUInt16();
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158 while (numberOfRectangles-- > 0) {
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159 FramebufferUpdateRectangle rect = new FramebufferUpdateRectangle();
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160 rect.fill(reader);
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161
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162 Decoder decoder = decoders.getDecoderByType(rect.getEncodingType());
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163 logger.finest(rect.toString() + (0 == numberOfRectangles ? "\n---" : ""));
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164 if (decoder != null) {
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165 decoder.decode(reader, renderer, rect);
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166 repaintController.repaintBitmap(rect);
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167 } else if (rect.getEncodingType() == EncodingType.RICH_CURSOR) {
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168 RichCursorDecoder.getInstance().decode(reader, renderer, rect);
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169 repaintController.repaintCursor();
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170 } else if (rect.getEncodingType() == EncodingType.CURSOR_POS) {
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171 renderer.decodeCursorPosition(rect);
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172 repaintController.repaintCursor();
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173 } else if (rect.getEncodingType() == EncodingType.DESKTOP_SIZE) {
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174 fullscreenFbUpdateIncrementalRequest =
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175 new FramebufferUpdateRequestMessage(0, 0, rect.width, rect.height, true);
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176 synchronized (renderer.getLock()) {
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177 renderer = repaintController.createRenderer(reader, rect.width, rect.height,
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178 context.getPixelFormat());
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179 }
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180 context.sendMessage(new FramebufferUpdateRequestMessage(0, 0, rect.width, rect.height, false));
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181 // repaintController.repaintCursor();
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182 } else
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183 throw new CommonException("Unprocessed encoding: " + rect.toString());
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184 }
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185 synchronized (this) {
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186 if (needSendPixelFormat) {
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187 needSendPixelFormat = false;
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188 context.setPixelFormat(pixelFormat);
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189 context.sendMessage(new SetPixelFormatMessage(pixelFormat));
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190 logger.fine("sent: "+pixelFormat);
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191 context.sendRefreshMessage();
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192 logger.fine("sent: nonincremental fb update");
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193 } else {
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194 context.sendMessage(fullscreenFbUpdateIncrementalRequest);
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195 }
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196 }
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197 }
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198
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199 public synchronized void queueUpdatePixelFormat(PixelFormat pf) {
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200 pixelFormat = pf;
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201 needSendPixelFormat = true;
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202 // context.sendMessage(new FramebufferUpdateRequestMessage(0, 0, 1, 1, false));
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203 }
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204
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205 public void stopTask() {
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206 isRunning = false;
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207 }
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208
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209 }
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