001 package net.minecraft.src;
002
003 import cpw.mods.fml.common.Side;
004 import cpw.mods.fml.common.asm.SideOnly;
005 import java.io.BufferedOutputStream;
006 import java.io.DataInputStream;
007 import java.io.DataOutputStream;
008 import java.io.IOException;
009 import java.net.Socket;
010 import java.net.SocketAddress;
011 import java.net.SocketException;
012 import java.security.PrivateKey;
013 import java.util.ArrayList;
014 import java.util.Collections;
015 import java.util.Iterator;
016 import java.util.List;
017 import java.util.concurrent.atomic.AtomicInteger;
018 import javax.crypto.SecretKey;
019
020 import cpw.mods.fml.common.network.FMLNetworkHandler;
021
022 public class TcpConnection implements NetworkManager
023 {
024 public static AtomicInteger field_74471_a = new AtomicInteger();
025 public static AtomicInteger field_74469_b = new AtomicInteger();
026
027 /** The object used for synchronization on the send queue. */
028 private Object sendQueueLock;
029
030 /** The socket used by this network manager. */
031 private Socket networkSocket;
032
033 /** The InetSocketAddress of the remote endpoint */
034 private final SocketAddress remoteSocketAddress;
035
036 /** The input stream connected to the socket. */
037 private volatile DataInputStream socketInputStream;
038
039 /** The output stream connected to the socket. */
040 private volatile DataOutputStream socketOutputStream;
041
042 /** Whether the network is currently operational. */
043 private volatile boolean isRunning;
044
045 /**
046 * Whether this network manager is currently terminating (and should ignore further errors).
047 */
048 private volatile boolean isTerminating;
049
050 /**
051 * Linked list of packets that have been read and are awaiting processing.
052 */
053 private List readPackets;
054
055 /** Linked list of packets awaiting sending. */
056 private List dataPackets;
057
058 /** Linked list of packets with chunk data that are awaiting sending. */
059 private List chunkDataPackets;
060
061 /** A reference to the NetHandler object. */
062 private NetHandler theNetHandler;
063
064 /**
065 * Whether this server is currently terminating. If this is a client, this is always false.
066 */
067 private boolean isServerTerminating;
068
069 /** The thread used for writing. */
070 private Thread writeThread;
071
072 /** The thread used for reading. */
073 private Thread readThread;
074
075 /** A String indicating why the network has shutdown. */
076 private String terminationReason;
077 private Object[] field_74480_w;
078 private int field_74490_x;
079
080 /**
081 * The length in bytes of the packets in both send queues (data and chunkData).
082 */
083 private int sendQueueByteLength;
084 public static int[] field_74470_c = new int[256];
085 public static int[] field_74467_d = new int[256];
086 public int field_74468_e;
087 boolean isInputBeingDecrypted;
088 boolean isOutputEncrypted;
089 private SecretKey sharedKeyForEncryption;
090 private PrivateKey field_74463_A;
091 private int field_74464_B;
092
093 @SideOnly(Side.CLIENT)
094 public TcpConnection(Socket par1Socket, String par2Str, NetHandler par3NetHandler) throws IOException
095 {
096 this(par1Socket, par2Str, par3NetHandler, (PrivateKey)null);
097 }
098
099 public TcpConnection(Socket par1Socket, String par2Str, NetHandler par3NetHandler, PrivateKey par4PrivateKey) throws IOException
100 {
101 this.sendQueueLock = new Object();
102 this.isRunning = true;
103 this.isTerminating = false;
104 this.readPackets = Collections.synchronizedList(new ArrayList());
105 this.dataPackets = Collections.synchronizedList(new ArrayList());
106 this.chunkDataPackets = Collections.synchronizedList(new ArrayList());
107 this.isServerTerminating = false;
108 this.terminationReason = "";
109 this.field_74490_x = 0;
110 this.sendQueueByteLength = 0;
111 this.field_74468_e = 0;
112 this.isInputBeingDecrypted = false;
113 this.isOutputEncrypted = false;
114 this.sharedKeyForEncryption = null;
115 this.field_74463_A = null;
116 this.field_74464_B = 50;
117 this.field_74463_A = par4PrivateKey;
118 this.networkSocket = par1Socket;
119 this.remoteSocketAddress = par1Socket.getRemoteSocketAddress();
120 this.theNetHandler = par3NetHandler;
121
122 try
123 {
124 par1Socket.setSoTimeout(30000);
125 par1Socket.setTrafficClass(24);
126 }
127 catch (SocketException var6)
128 {
129 System.err.println(var6.getMessage());
130 }
131
132 this.socketInputStream = new DataInputStream(par1Socket.getInputStream());
133 this.socketOutputStream = new DataOutputStream(new BufferedOutputStream(par1Socket.getOutputStream(), 5120));
134 this.readThread = new TcpReaderThread(this, par2Str + " read thread");
135 this.writeThread = new TcpWriterThread(this, par2Str + " write thread");
136 this.readThread.start();
137 this.writeThread.start();
138 }
139
140 @SideOnly(Side.CLIENT)
141 public void closeConnections()
142 {
143 this.wakeThreads();
144 this.writeThread = null;
145 this.readThread = null;
146 }
147
148 /**
149 * Sets the NetHandler for this NetworkManager. Server-only.
150 */
151 public void setNetHandler(NetHandler par1NetHandler)
152 {
153 this.theNetHandler = par1NetHandler;
154 }
155
156 /**
157 * Adds the packet to the correct send queue (chunk data packets go to a separate queue).
158 */
159 public void addToSendQueue(Packet par1Packet)
160 {
161 if (!this.isServerTerminating)
162 {
163 Object var2 = this.sendQueueLock;
164
165 synchronized (this.sendQueueLock)
166 {
167 this.sendQueueByteLength += par1Packet.getPacketSize() + 1;
168
169 if (par1Packet.isChunkDataPacket)
170 {
171 this.chunkDataPackets.add(par1Packet);
172 }
173 else
174 {
175 this.dataPackets.add(par1Packet);
176 }
177 }
178 }
179 }
180
181 /**
182 * Sends a data packet if there is one to send, or sends a chunk data packet if there is one and the counter is up,
183 * or does nothing.
184 */
185 private boolean sendPacket()
186 {
187 boolean var1 = false;
188
189 try
190 {
191 Packet var2;
192 int var10001;
193 int[] var10000;
194
195 if (this.field_74468_e == 0 || System.currentTimeMillis() - ((Packet)this.dataPackets.get(0)).creationTimeMillis >= (long)this.field_74468_e)
196 {
197 var2 = this.func_74460_a(false);
198
199 if (var2 != null)
200 {
201 Packet.writePacket(var2, this.socketOutputStream);
202
203 if (var2 instanceof Packet252SharedKey && !this.isOutputEncrypted)
204 {
205 if (!this.theNetHandler.isServerHandler())
206 {
207 this.sharedKeyForEncryption = ((Packet252SharedKey)var2).func_73304_d();
208 }
209
210 this.encryptOuputStream();
211 }
212
213 var10000 = field_74467_d;
214 var10001 = var2.getPacketId();
215 var10000[var10001] += var2.getPacketSize() + 1;
216 var1 = true;
217 }
218 }
219
220 if (this.field_74464_B-- <= 0 && (this.field_74468_e == 0 || System.currentTimeMillis() - ((Packet)this.chunkDataPackets.get(0)).creationTimeMillis >= (long)this.field_74468_e))
221 {
222 var2 = this.func_74460_a(true);
223
224 if (var2 != null)
225 {
226 Packet.writePacket(var2, this.socketOutputStream);
227 var10000 = field_74467_d;
228 var10001 = var2.getPacketId();
229 var10000[var10001] += var2.getPacketSize() + 1;
230 this.field_74464_B = 0;
231 var1 = true;
232 }
233 }
234
235 return var1;
236 }
237 catch (Exception var3)
238 {
239 if (!this.isTerminating)
240 {
241 this.onNetworkError(var3);
242 }
243
244 return false;
245 }
246 }
247
248 private Packet func_74460_a(boolean par1)
249 {
250 Packet var2 = null;
251 List var3 = par1 ? this.chunkDataPackets : this.dataPackets;
252 Object var4 = this.sendQueueLock;
253
254 synchronized (this.sendQueueLock)
255 {
256 while (!var3.isEmpty() && var2 == null)
257 {
258 var2 = (Packet)var3.remove(0);
259 this.sendQueueByteLength -= var2.getPacketSize() + 1;
260
261 if (this.func_74454_a(var2, par1))
262 {
263 var2 = null;
264 }
265 }
266
267 return var2;
268 }
269 }
270
271 private boolean func_74454_a(Packet par1Packet, boolean par2)
272 {
273 if (!par1Packet.isRealPacket())
274 {
275 return false;
276 }
277 else
278 {
279 List var3 = par2 ? this.chunkDataPackets : this.dataPackets;
280 Iterator var4 = var3.iterator();
281 Packet var5;
282
283 do
284 {
285 if (!var4.hasNext())
286 {
287 return false;
288 }
289
290 var5 = (Packet)var4.next();
291 }
292 while (var5.getPacketId() != par1Packet.getPacketId());
293
294 return par1Packet.containsSameEntityIDAs(var5);
295 }
296 }
297
298 /**
299 * Wakes reader and writer threads
300 */
301 public void wakeThreads()
302 {
303 if (this.readThread != null)
304 {
305 this.readThread.interrupt();
306 }
307
308 if (this.writeThread != null)
309 {
310 this.writeThread.interrupt();
311 }
312 }
313
314 /**
315 * Reads a single packet from the input stream and adds it to the read queue. If no packet is read, it shuts down
316 * the network.
317 */
318 private boolean readPacket()
319 {
320 boolean var1 = false;
321
322 try
323 {
324 Packet var2 = Packet.readPacket(this.socketInputStream, this.theNetHandler.isServerHandler());
325
326 if (var2 != null)
327 {
328 if (var2 instanceof Packet252SharedKey && !this.isInputBeingDecrypted)
329 {
330 if (this.theNetHandler.isServerHandler())
331 {
332 this.sharedKeyForEncryption = ((Packet252SharedKey)var2).func_73303_a(this.field_74463_A);
333 }
334
335 this.decryptInputStream();
336 }
337
338 int[] var10000 = field_74470_c;
339 int var10001 = var2.getPacketId();
340 var10000[var10001] += var2.getPacketSize() + 1;
341
342 if (!this.isServerTerminating)
343 {
344 if (var2.isWritePacket() && this.theNetHandler.canProcessPackets())
345 {
346 this.field_74490_x = 0;
347 var2.processPacket(this.theNetHandler);
348 }
349 else
350 {
351 this.readPackets.add(var2);
352 }
353 }
354
355 var1 = true;
356 }
357 else
358 {
359 this.networkShutdown("disconnect.endOfStream", new Object[0]);
360 }
361
362 return var1;
363 }
364 catch (Exception var3)
365 {
366 if (!this.isTerminating)
367 {
368 this.onNetworkError(var3);
369 }
370
371 return false;
372 }
373 }
374
375 /**
376 * Used to report network errors and causes a network shutdown.
377 */
378 private void onNetworkError(Exception par1Exception)
379 {
380 par1Exception.printStackTrace();
381 this.networkShutdown("disconnect.genericReason", new Object[] {"Internal exception: " + par1Exception.toString()});
382 }
383
384 /**
385 * Shuts down the network with the specified reason. Closes all streams and sockets, spawns NetworkMasterThread to
386 * stop reading and writing threads.
387 */
388 public void networkShutdown(String par1Str, Object ... par2ArrayOfObj)
389 {
390 if (this.isRunning)
391 {
392 this.isTerminating = true;
393 this.terminationReason = par1Str;
394 this.field_74480_w = par2ArrayOfObj;
395 this.isRunning = false;
396 (new TcpMasterThread(this)).start();
397
398 try
399 {
400 this.socketInputStream.close();
401 this.socketInputStream = null;
402 this.socketOutputStream.close();
403 this.socketOutputStream = null;
404 this.networkSocket.close();
405 this.networkSocket = null;
406 }
407 catch (Throwable var4)
408 {
409 ;
410 }
411 }
412 }
413
414 /**
415 * Checks timeouts and processes all pending read packets.
416 */
417 public void processReadPackets()
418 {
419 if (this.sendQueueByteLength > 2097152)
420 {
421 this.networkShutdown("disconnect.overflow", new Object[0]);
422 }
423
424 if (this.readPackets.isEmpty())
425 {
426 if (this.field_74490_x++ == 1200)
427 {
428 this.networkShutdown("disconnect.timeout", new Object[0]);
429 }
430 }
431 else
432 {
433 this.field_74490_x = 0;
434 }
435
436 int var1 = 1000;
437
438 while (!this.readPackets.isEmpty() && var1-- >= 0)
439 {
440 Packet var2 = (Packet)this.readPackets.remove(0);
441 var2.processPacket(this.theNetHandler);
442 }
443
444 this.wakeThreads();
445
446 if (this.isTerminating && this.readPackets.isEmpty())
447 {
448 this.theNetHandler.handleErrorMessage(this.terminationReason, this.field_74480_w);
449 FMLNetworkHandler.onConnectionClosed(this, this.theNetHandler.getPlayer());
450 }
451 }
452
453 /**
454 * Return the InetSocketAddress of the remote endpoint
455 */
456 public SocketAddress getSocketAddress()
457 {
458 return this.remoteSocketAddress;
459 }
460
461 /**
462 * Shuts down the server. (Only actually used on the server)
463 */
464 public void serverShutdown()
465 {
466 if (!this.isServerTerminating)
467 {
468 this.wakeThreads();
469 this.isServerTerminating = true;
470 this.readThread.interrupt();
471 (new TcpMonitorThread(this)).start();
472 }
473 }
474
475 private void decryptInputStream() throws IOException
476 {
477 this.isInputBeingDecrypted = true;
478 this.socketInputStream = new DataInputStream(CryptManager.decryptInputStream(this.sharedKeyForEncryption, this.networkSocket.getInputStream()));
479 }
480
481 /**
482 * flushes the stream and replaces it with an encryptedOutputStream
483 */
484 private void encryptOuputStream() throws IOException
485 {
486 this.socketOutputStream.flush();
487 this.isOutputEncrypted = true;
488 this.socketOutputStream = new DataOutputStream(new BufferedOutputStream(CryptManager.encryptOuputStream(this.sharedKeyForEncryption, this.networkSocket.getOutputStream()), 5120));
489 }
490
491 /**
492 * returns 0 for memoryConnections
493 */
494 public int packetSize()
495 {
496 return this.chunkDataPackets.size();
497 }
498
499 public Socket getSocket()
500 {
501 return this.networkSocket;
502 }
503
504 /**
505 * Whether the network is operational.
506 */
507 static boolean isRunning(TcpConnection par0TcpConnection)
508 {
509 return par0TcpConnection.isRunning;
510 }
511
512 /**
513 * Is the server terminating? Client side aways returns false.
514 */
515 static boolean isServerTerminating(TcpConnection par0TcpConnection)
516 {
517 return par0TcpConnection.isServerTerminating;
518 }
519
520 /**
521 * Static accessor to readPacket.
522 */
523 static boolean readNetworkPacket(TcpConnection par0TcpConnection)
524 {
525 return par0TcpConnection.readPacket();
526 }
527
528 /**
529 * Static accessor to sendPacket.
530 */
531 static boolean sendNetworkPacket(TcpConnection par0TcpConnection)
532 {
533 return par0TcpConnection.sendPacket();
534 }
535
536 static DataOutputStream getOutputStream(TcpConnection par0TcpConnection)
537 {
538 return par0TcpConnection.socketOutputStream;
539 }
540
541 /**
542 * Gets whether the Network manager is terminating.
543 */
544 static boolean isTerminating(TcpConnection par0TcpConnection)
545 {
546 return par0TcpConnection.isTerminating;
547 }
548
549 /**
550 * Sends the network manager an error
551 */
552 static void sendError(TcpConnection par0TcpConnection, Exception par1Exception)
553 {
554 par0TcpConnection.onNetworkError(par1Exception);
555 }
556
557 /**
558 * Returns the read thread.
559 */
560 static Thread getReadThread(TcpConnection par0TcpConnection)
561 {
562 return par0TcpConnection.readThread;
563 }
564
565 /**
566 * Returns the write thread.
567 */
568 static Thread getWriteThread(TcpConnection par0TcpConnection)
569 {
570 return par0TcpConnection.writeThread;
571 }
572 }