summaryrefslogtreecommitdiffstats
path: root/source/Protocol/Protocol17x.cpp
blob: ef80294337e1718f08328746f262735e20b527c0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672

// Protocol17x.cpp

/*
Implements the 1.7.x protocol classes:
	- cProtocol172
		- release 1.7.2 protocol (#4)
(others may be added later in the future for the 1.7 release series)
*/

#include "Globals.h"
#include "Protocol17x.h"
#include "ChunkDataSerializer.h"
#include "../ClientHandle.h"
#include "../Root.h"
#include "../Server.h"
#include "../World.h"
#include "../WorldStorage/FastNBT.h"
#include "../StringCompression.h"
#include "../Entities/FallingBlock.h"
#include "../Entities/Pickup.h"
#include "../Entities/Player.h"
#include "../UI/Window.h"





#define HANDLE_READ(Proc, Type, Var) \
	Type Var; \
	m_ReceivedData.Proc(Var);





#define HANDLE_PACKET_READ(Proc, Type, Var) \
	Type Var; \
	{ \
		if (!m_ReceivedData.Proc(Var)) \
		{ \
			m_ReceivedData.CheckValid(); \
			return false; \
		} \
		m_ReceivedData.CheckValid(); \
	}





cProtocol172::cProtocol172(cClientHandle * a_Client, const AString & a_ServerAddress, UInt16 a_ServerPort, UInt32 a_State) :
	super(a_Client),
	m_ServerAddress(a_ServerAddress),
	m_ServerPort(a_ServerPort),
	m_State(a_State),
	m_ReceivedData(32 KiB),
	m_OutPacketBuffer(64 KiB),
	m_OutPacketLenBuffer(20),  // 20 bytes is more than enough for one VarInt
	m_IsEncrypted(false)
{
}





void cProtocol172::DataReceived(const char * a_Data, int a_Size)
{
	if (m_IsEncrypted)
	{
		byte Decrypted[512];
		while (a_Size > 0)
		{
			int NumBytes = (a_Size > sizeof(Decrypted)) ? sizeof(Decrypted) : a_Size;
			m_Decryptor.ProcessData(Decrypted, (byte *)a_Data, NumBytes);
			AddReceivedData((const char *)Decrypted, NumBytes);
			a_Size -= NumBytes;
			a_Data += NumBytes;
		}
	}
	else
	{
		AddReceivedData(a_Data, a_Size);
	}
}





void cProtocol172::SendAttachEntity(const cEntity & a_Entity, const cEntity * a_Vehicle)
{
	cPacketizer Pkt(*this, 0x1b);  // Attach Entity packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteInt((a_Vehicle != NULL) ? a_Vehicle->GetUniqueID() : 0);
	Pkt.WriteBool(false);
}





void cProtocol172::SendBlockAction(int a_BlockX, int a_BlockY, int a_BlockZ, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType)
{
	cPacketizer Pkt(*this, 0x24);  // Block Action packet
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteShort(a_BlockY);
	Pkt.WriteInt(a_BlockZ);
	Pkt.WriteByte(a_Byte1);
	Pkt.WriteByte(a_Byte2);
	Pkt.WriteVarInt(a_BlockType);
}





void cProtocol172::SendBlockBreakAnim(int a_EntityID, int a_BlockX, int a_BlockY, int a_BlockZ, char a_Stage)
{
	cPacketizer Pkt(*this, 0x24);  // Block Break Animation packet
	Pkt.WriteInt(a_EntityID);
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteInt(a_BlockY);
	Pkt.WriteInt(a_BlockZ);
	Pkt.WriteChar(a_Stage);
}





void cProtocol172::SendBlockChange(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
{
	cPacketizer Pkt(*this, 0x23);  // Block Change packet
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteByte(a_BlockY);
	Pkt.WriteInt(a_BlockZ);
	Pkt.WriteVarInt(a_BlockType);
	Pkt.WriteByte(a_BlockMeta);
}





void cProtocol172::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlockVector & a_Changes)
{
	cPacketizer Pkt(*this, 0x22);  // Multi Block Change packet
	Pkt.WriteInt(a_ChunkX);
	Pkt.WriteInt(a_ChunkZ);
	Pkt.WriteShort((short)a_Changes.size());
	Pkt.WriteInt(a_Changes.size() * 4);
	for (sSetBlockVector::const_iterator itr = a_Changes.begin(), end = a_Changes.end(); itr != end; ++itr)
	{
		unsigned int Coords = itr->y | (itr->z << 8) | (itr->x << 12);
		unsigned int Blocks = itr->BlockMeta | (itr->BlockType << 4);
		Pkt.WriteInt((Coords << 16) | Blocks);
	}  // for itr - a_Changes[]
}





void cProtocol172::SendChat(const AString & a_Message)
{
	cPacketizer Pkt(*this, 0x02);  // Chat Message packet
	Pkt.WriteString(Printf("{\"text\":\"%s\"}", EscapeString(a_Message).c_str()));
}





void cProtocol172::SendChunkData(int a_ChunkX, int a_ChunkZ, cChunkDataSerializer & a_Serializer)
{
	// Serialize first, before creating the Packetizer (the packetizer locks a CS)
	// This contains the flags and bitmasks, too
	const AString & ChunkData = a_Serializer.Serialize(cChunkDataSerializer::RELEASE_1_3_2);
	
	cPacketizer Pkt(*this, 0x21);  // Chunk Data packet
	Pkt.WriteInt(a_ChunkX);
	Pkt.WriteInt(a_ChunkZ);
	Pkt.WriteBuf(ChunkData.data(), ChunkData.size());
}





void cProtocol172::SendCollectPickup(const cPickup & a_Pickup, const cPlayer & a_Player)
{
	cPacketizer Pkt(*this, 0x0d);  // Collect Item packet
	Pkt.WriteInt(a_Pickup.GetUniqueID());
	Pkt.WriteInt(a_Player.GetUniqueID());
}





void cProtocol172::SendDestroyEntity(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x13);  // Destroy Entities packet
	Pkt.WriteByte(1);
	Pkt.WriteInt(a_Entity.GetUniqueID());
}





void cProtocol172::SendDisconnect(const AString & a_Reason)
{
	cPacketizer Pkt(*this, 0x40);
	Pkt.WriteString(a_Reason);
}





void cProtocol172::SendEditSign(int a_BlockX, int a_BlockY, int a_BlockZ)
{
	cPacketizer Pkt(*this, 0x36);  // Sign Editor Open packet
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteInt(a_BlockY);
	Pkt.WriteInt(a_BlockZ);
}





void cProtocol172::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item)
{
	cPacketizer Pkt(*this, 0x04);  // Entity Equipment packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteShort(a_SlotNum);
	Pkt.WriteItem(a_Item);
}





void cProtocol172::SendEntityHeadLook(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x19);  // Entity Head Look packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteByteAngle(a_Entity.GetHeadYaw());
}





void cProtocol172::SendEntityLook(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x16);  // Entity Look packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
}





void cProtocol172::SendEntityMetadata(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x1c);  // Entity Metadata packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteEntityMetadata(a_Entity);
	Pkt.WriteByte(0x7f);  // The termination byte
}





void cProtocol172::SendEntityProperties(const cEntity & a_Entity)
{
	/*
	cPacketizer Pkt(*this, 0x20);  // Entity Properties packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	// TODO
	*/
}





void cProtocol172::SendEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
{
	cPacketizer Pkt(*this, 0x15);  // Entity Relative Move packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteByte(a_RelX);
	Pkt.WriteByte(a_RelY);
	Pkt.WriteByte(a_RelZ);
}





void cProtocol172::SendEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
{
	cPacketizer Pkt(*this, 0x17);  // Entity Look And Relative Move packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteByte(a_RelX);
	Pkt.WriteByte(a_RelY);
	Pkt.WriteByte(a_RelZ);
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
}





void cProtocol172::SendEntityStatus(const cEntity & a_Entity, char a_Status)
{
	cPacketizer Pkt(*this, 0x1a);  // Entity Status packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteChar(a_Status);
}





void cProtocol172::SendEntityVelocity(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x12);  // Entity Velocity packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	// 400 = 8000 / 20 ... Conversion from our speed in m/s to 8000 m/tick
	Pkt.WriteShort((short)(a_Entity.GetSpeedX() * 400));
	Pkt.WriteShort((short)(a_Entity.GetSpeedY() * 400));
	Pkt.WriteShort((short)(a_Entity.GetSpeedZ() * 400));
}





void cProtocol172::SendExplosion(double a_BlockX, double a_BlockY, double a_BlockZ, float a_Radius, const cVector3iArray & a_BlocksAffected, const Vector3d & a_PlayerMotion)
{
	cPacketizer Pkt(*this, 0x27);  // Explosion packet
	Pkt.WriteFloat((float)a_BlockX);
	Pkt.WriteFloat((float)a_BlockY);
	Pkt.WriteFloat((float)a_BlockZ);
	Pkt.WriteFloat((float)a_Radius);
	Pkt.WriteInt(a_BlocksAffected.size());
	for (cVector3iArray::const_iterator itr = a_BlocksAffected.begin(), end = a_BlocksAffected.end(); itr != end; ++itr)
	{
		Pkt.WriteChar((char)itr->x);
		Pkt.WriteChar((char)itr->y);
		Pkt.WriteChar((char)itr->z);
	}  // for itr - a_BlockAffected[]
	Pkt.WriteFloat((float)a_PlayerMotion.x);
	Pkt.WriteFloat((float)a_PlayerMotion.y);
	Pkt.WriteFloat((float)a_PlayerMotion.z);
}





void cProtocol172::SendGameMode(eGameMode a_GameMode)
{
	cPacketizer Pkt(*this, 0x2b);  // Change Game State packet
	Pkt.WriteByte(3);  // Reason: Change game mode
	Pkt.WriteFloat((float)a_GameMode);
}





void cProtocol172::SendHealth(void)
{
	cPacketizer Pkt(*this, 0x06);  // Update Health packet
	Pkt.WriteFloat((float)m_Client->GetPlayer()->GetHealth());
	Pkt.WriteShort(m_Client->GetPlayer()->GetFoodLevel());
	Pkt.WriteFloat((float)m_Client->GetPlayer()->GetFoodSaturationLevel());
}





void cProtocol172::SendInventorySlot(char a_WindowID, short a_SlotNum, const cItem & a_Item)
{
	cPacketizer Pkt(*this, 0x2f);  // Set Slot packet
	Pkt.WriteChar(a_WindowID);
	Pkt.WriteShort(a_SlotNum);
	Pkt.WriteItem(a_Item);
}





void cProtocol172::SendKeepAlive(int a_PingID)
{
	cPacketizer Pkt(*this, 0x00);  // Keep Alive packet
	Pkt.WriteInt(a_PingID);
}





void cProtocol172::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
{
	// Send the Join Game packet:
	{
		cPacketizer Pkt(*this, 0x01);  // Join Game packet
		Pkt.WriteInt(a_Player.GetUniqueID());
		Pkt.WriteByte((Byte)a_Player.GetEffectiveGameMode());
		Pkt.WriteChar((char)a_World.GetDimension());
		Pkt.WriteByte(2);  // TODO: Difficulty (set to Normal)
		Pkt.WriteByte(cRoot::Get()->GetServer()->GetMaxPlayers());
		Pkt.WriteString("default");  // Level type - wtf?
	}
	
	// Send the spawn position:
	{
		cPacketizer Pkt(*this, 0x05);  // Spawn Position packet
		Pkt.WriteInt((int)a_World.GetSpawnX());
		Pkt.WriteInt((int)a_World.GetSpawnY());
		Pkt.WriteInt((int)a_World.GetSpawnZ());
	}
	
	// Send player abilities:
	SendPlayerAbilities();
}





void cProtocol172::SendPickupSpawn(const cPickup & a_Pickup)
{
	{
		cPacketizer Pkt(*this, 0x0e);  // Spawn Object packet
		Pkt.WriteInt(a_Pickup.GetUniqueID());
		Pkt.WriteByte(2);  // Type = Pickup
		Pkt.WriteFPInt(a_Pickup.GetPosX());
		Pkt.WriteFPInt(a_Pickup.GetPosY());
		Pkt.WriteFPInt(a_Pickup.GetPosZ());
		Pkt.WriteByteAngle(a_Pickup.GetYaw());
		Pkt.WriteByteAngle(a_Pickup.GetPitch());
		Pkt.WriteInt(0);  // No object data
	}
	{
		cPacketizer Pkt(*this, 0x1c);  // Entity Metadata packet
		Pkt.WriteInt(a_Pickup.GetUniqueID());
		Pkt.WriteByte((0x05 << 5) | 10);  // Slot type + index 10
		Pkt.WriteItem(a_Pickup.GetItem());
		Pkt.WriteByte(0x7f);  // End of metadata
	}
}





void cProtocol172::SendPlayerAbilities(void)
{
	cPacketizer Pkt(*this, 0x39);  // Player Abilities packet
	Byte Flags = 0;
	if (m_Client->GetPlayer()->IsGameModeCreative())
	{
		Flags |= 0x01;
	}
	// TODO: Other flags (god mode, flying, can fly
	Pkt.WriteByte(Flags);
	// TODO: Pkt.WriteFloat(m_Client->GetPlayer()->GetMaxFlyingSpeed());
	Pkt.WriteFloat(0.05f);
	Pkt.WriteFloat((float)m_Client->GetPlayer()->GetMaxSpeed());
}





void cProtocol172::SendPlayerAnimation(const cPlayer & a_Player, char a_Animation)
{
	cPacketizer Pkt(*this, 0x0b);  // Animation packet
	Pkt.WriteInt(a_Player.GetUniqueID());
	Pkt.WriteChar(a_Animation);
}





void cProtocol172::SendPlayerListItem(const cPlayer & a_Player, bool a_IsOnline)
{
	cPacketizer Pkt(*this, 0x38);  // Playerlist Item packet
	Pkt.WriteString(a_Player.GetName());
	Pkt.WriteBool(a_IsOnline);
	Pkt.WriteShort(a_Player.GetClientHandle()->GetPing());
}





void cProtocol172::SendPlayerMaxSpeed(void)
{
	SendPlayerAbilities();
}





void cProtocol172::SendPlayerMoveLook(void)
{
	cPacketizer Pkt(*this, 0x08);  // Player Position And Look packet
	Pkt.WriteDouble(m_Client->GetPlayer()->GetPosX());
	Pkt.WriteDouble(m_Client->GetPlayer()->GetPosY());
	Pkt.WriteDouble(m_Client->GetPlayer()->GetPosZ());
	Pkt.WriteFloat((float)m_Client->GetPlayer()->GetYaw());
	Pkt.WriteFloat((float)m_Client->GetPlayer()->GetPitch());
	Pkt.WriteBool(m_Client->GetPlayer()->IsOnGround());
}





void cProtocol172::SendPlayerPosition(void)
{
	// There is no dedicated packet for this, send the whole thing:
	SendPlayerMoveLook();
}





void cProtocol172::SendPlayerSpawn(const cPlayer & a_Player)
{
	// Called to spawn another player for the client
	cPacketizer Pkt(*this, 0x0c);  // Spawn Player packet
	Pkt.WriteInt(a_Player.GetUniqueID());
	Pkt.WriteString(Printf("%d", a_Player.GetUniqueID()));  // TODO: Proper UUID
	Pkt.WriteString(a_Player.GetName());
	Pkt.WriteFPInt(a_Player.GetPosX());
	Pkt.WriteFPInt(a_Player.GetPosY());
	Pkt.WriteFPInt(a_Player.GetPosZ());
	Pkt.WriteByteAngle(a_Player.GetYaw());
	Pkt.WriteByteAngle(a_Player.GetPitch());
	short ItemType = a_Player.GetEquippedItem().IsEmpty() ? 0 : a_Player.GetEquippedItem().m_ItemType;
	Pkt.WriteShort(ItemType);
	Pkt.WriteByte((3 << 5) | 6);  // Metadata: float + index 6
	Pkt.WriteFloat((float)a_Player.GetHealth());
	Pkt.WriteByte(0x7f);  // Metadata: end
}





void cProtocol172::SendRespawn(void)
{
	cPacketizer Pkt(*this, 0x07);  // Respawn packet
	Pkt.WriteInt(m_Client->GetPlayer()->GetWorld()->GetDimension());
	Pkt.WriteByte(2);  // TODO: Difficulty (set to Normal)
	Pkt.WriteByte((Byte)m_Client->GetPlayer()->GetEffectiveGameMode());
	Pkt.WriteString("default");
}





void cProtocol172::SendSoundEffect(const AString & a_SoundName, int a_SrcX, int a_SrcY, int a_SrcZ, float a_Volume, float a_Pitch)  // a_Src coords are Block * 8
{
	cPacketizer Pkt(*this, 0x29);  // Sound Effect packet
	Pkt.WriteString(a_SoundName);
	Pkt.WriteInt(a_SrcX);
	Pkt.WriteInt(a_SrcY);
	Pkt.WriteInt(a_SrcZ);
	Pkt.WriteFloat(a_Volume);
	Pkt.WriteByte((Byte)(a_Pitch * 63));
}





void cProtocol172::SendSoundParticleEffect(int a_EffectID, int a_SrcX, int a_SrcY, int a_SrcZ, int a_Data)
{
	cPacketizer Pkt(*this, 0x28);  // Effect packet
	Pkt.WriteInt(a_EffectID);
	Pkt.WriteInt(a_SrcX);
	// TODO: Check if this is really an int
	// wiki.vg says it's a byte, but that wouldn't cover the entire range needed (Y location * 8 = 0..2048)
	Pkt.WriteInt(a_SrcY);
	Pkt.WriteInt(a_SrcZ);
	Pkt.WriteInt(a_Data);
	Pkt.WriteBool(false);
}





void cProtocol172::SendSpawnFallingBlock(const cFallingBlock & a_FallingBlock)
{
	cPacketizer Pkt(*this, 0x0e);  // Spawn Object packet
	Pkt.WriteInt(a_FallingBlock.GetUniqueID());
	Pkt.WriteByte(70);  // Falling block
	Pkt.WriteFPInt(a_FallingBlock.GetPosX());
	Pkt.WriteFPInt(a_FallingBlock.GetPosY());
	Pkt.WriteFPInt(a_FallingBlock.GetPosZ());
	Pkt.WriteByteAngle(a_FallingBlock.GetYaw());
	Pkt.WriteByteAngle(a_FallingBlock.GetPitch());
	Pkt.WriteInt(((int)a_FallingBlock.GetBlockType()) | (((int)a_FallingBlock.GetBlockMeta()) << 12));
	Pkt.WriteShort((short)(a_FallingBlock.GetSpeedX() * 400));
	Pkt.WriteShort((short)(a_FallingBlock.GetSpeedY() * 400));
	Pkt.WriteShort((short)(a_FallingBlock.GetSpeedZ() * 400));
}





void cProtocol172::SendSpawnMob(const cMonster & a_Mob)
{
	cPacketizer Pkt(*this, 0x0f);  // Spawn Mob packet
	Pkt.WriteVarInt(a_Mob.GetUniqueID());
	Pkt.WriteByte((Byte)a_Mob.GetMobType());
	Pkt.WriteFPInt(a_Mob.GetPosX());
	Pkt.WriteFPInt(a_Mob.GetPosY());
	Pkt.WriteFPInt(a_Mob.GetPosZ());
	Pkt.WriteByteAngle(a_Mob.GetPitch());
	Pkt.WriteByteAngle(a_Mob.GetHeadYaw());
	Pkt.WriteByteAngle(a_Mob.GetYaw());
	Pkt.WriteShort((short)(a_Mob.GetSpeedX() * 400));
	Pkt.WriteShort((short)(a_Mob.GetSpeedY() * 400));
	Pkt.WriteShort((short)(a_Mob.GetSpeedZ() * 400));
	Pkt.WriteEntityMetadata(a_Mob);
	Pkt.WriteByte(0x7f);  // Metadata terminator
}





void cProtocol172::SendSpawnObject(const cEntity & a_Entity, char a_ObjectType, int a_ObjectData, Byte a_Yaw, Byte a_Pitch)
{
	cPacketizer Pkt(*this, 0xe);  // Spawn Object packet
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteByte(a_ObjectType);
	Pkt.WriteFPInt(a_Entity.GetPosX());
	Pkt.WriteFPInt(a_Entity.GetPosY());
	Pkt.WriteFPInt(a_Entity.GetPosZ());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
	Pkt.WriteInt(a_ObjectData);
	if (a_ObjectData != 0)
	{
		Pkt.WriteShort((short)(a_Entity.GetSpeedX() * 400));
		Pkt.WriteShort((short)(a_Entity.GetSpeedY() * 400));
		Pkt.WriteShort((short)(a_Entity.GetSpeedZ() * 400));
	}
}





void cProtocol172::SendSpawnVehicle(const cEntity & a_Vehicle, char a_VehicleType, char a_VehicleSubType)
{
	cPacketizer Pkt(*this, 0xe);  // Spawn Object packet
	Pkt.WriteInt(a_Vehicle.GetUniqueID());
	Pkt.WriteByte(a_VehicleType);
	Pkt.WriteFPInt(a_Vehicle.GetPosX());
	Pkt.WriteFPInt(a_Vehicle.GetPosY());
	Pkt.WriteFPInt(a_Vehicle.GetPosZ());
	Pkt.WriteByteAngle(a_Vehicle.GetYaw());
	Pkt.WriteByteAngle(a_Vehicle.GetPitch());
	Pkt.WriteInt(a_VehicleSubType);
	if (a_VehicleSubType != 0)
	{
		Pkt.WriteShort((short)(a_Vehicle.GetSpeedX() * 400));
		Pkt.WriteShort((short)(a_Vehicle.GetSpeedY() * 400));
		Pkt.WriteShort((short)(a_Vehicle.GetSpeedZ() * 400));
	}
}





void cProtocol172::SendTabCompletionResults(const AStringVector & a_Results)
{
	AString Results;
	Results.reserve(500);  // Make a moderate reservation to avoid excessive reallocations
	for (AStringVector::const_iterator itr = a_Results.begin(), end = a_Results.end(); itr != end; ++itr)
	{
		Results.append(*itr);
		Results.push_back(0);
	}
	
	cPacketizer Pkt(*this, 0x3a);  // Tab-Complete packet
	Pkt.WriteVarInt(a_Results.size());
	Pkt.WriteString(Results);
}





void cProtocol172::SendTeleportEntity(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x18);
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteFPInt(a_Entity.GetPosX());
	Pkt.WriteFPInt(a_Entity.GetPosY());
	Pkt.WriteFPInt(a_Entity.GetPosZ());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
}





void cProtocol172::SendThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ)
{
	cPacketizer Pkt(*this, 0x2c);  // Spawn Global Entity packet
	Pkt.WriteVarInt(0);  // EntityID = 0, always
	Pkt.WriteByte(1);  // Type = Thunderbolt
	Pkt.WriteFPInt(a_BlockX);
	Pkt.WriteFPInt(a_BlockY);
	Pkt.WriteFPInt(a_BlockZ);
}





void cProtocol172::SendTimeUpdate(Int64 a_WorldAge, Int64 a_TimeOfDay)
{
	cPacketizer Pkt(*this, 0x03);
	Pkt.WriteInt64(a_WorldAge);
	Pkt.WriteInt64(a_TimeOfDay);
}





void cProtocol172::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
{
	cPacketizer Pkt(*this, 0x21);  // Chunk Data packet
	Pkt.WriteInt(a_ChunkX);
	Pkt.WriteInt(a_ChunkZ);
	Pkt.WriteBool(true);
	Pkt.WriteShort(0);  // Primary bitmap
	Pkt.WriteShort(0);  // Add bitmap
	Pkt.WriteInt(0);  // Compressed data size
}





void cProtocol172::SendUpdateSign(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4)
{
	cPacketizer Pkt(*this, 0x33);
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteShort((short)a_BlockY);
	Pkt.WriteInt(a_BlockZ);
	Pkt.WriteString(a_Line1);
	Pkt.WriteString(a_Line2);
	Pkt.WriteString(a_Line3);
	Pkt.WriteString(a_Line4);
}





void cProtocol172::SendUseBed(const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ)
{
	cPacketizer Pkt(*this, 0x0a);
	Pkt.WriteInt(a_Entity.GetUniqueID());
	Pkt.WriteInt(a_BlockX);
	Pkt.WriteByte((Byte)a_BlockY);
	Pkt.WriteInt(a_BlockZ);
}





void cProtocol172::SendWeather(eWeather a_Weather)
{
	cPacketizer Pkt(*this, 0x2b);  // Change Game State packet
	Pkt.WriteByte((a_Weather == wSunny) ? 2 : 1);  // begin rain / end rain
	Pkt.WriteFloat(0);  // unused
}





void cProtocol172::SendWholeInventory(const cWindow & a_Window)
{
	cPacketizer Pkt(*this, 0x30);  // Window Items packet
	Pkt.WriteChar(a_Window.GetWindowID());
	Pkt.WriteShort(a_Window.GetNumSlots());
	cItems Slots;
	a_Window.GetSlots(*(m_Client->GetPlayer()), Slots);
	for (cItems::const_iterator itr = Slots.begin(), end = Slots.end(); itr != end; ++itr)
	{
		Pkt.WriteItem(*itr);
	}  // for itr - Slots[]
}





void cProtocol172::SendWindowClose(const cWindow & a_Window)
{
	cPacketizer Pkt(*this, 0x2e);
	Pkt.WriteChar(a_Window.GetWindowID());
}





void cProtocol172::SendWindowOpen(char a_WindowID, char a_WindowType, const AString & a_WindowTitle, char a_NumSlots)
{
	cPacketizer Pkt(*this, 0x2d);
	Pkt.WriteChar(a_WindowID);
	Pkt.WriteChar(a_WindowType);
	Pkt.WriteString(a_WindowTitle);
	Pkt.WriteChar(a_NumSlots);
	Pkt.WriteBool(true);
	/*
	// TODO:
	if (a_WindowType == cWindow::wtHorse)
	{
		Pkt.WriteInt(HorseID);
	}
	*/
}





void cProtocol172::SendWindowProperty(const cWindow & a_Window, short a_Property, short a_Value)
{
	cPacketizer Pkt(*this, 0x31);  // Window Property packet
	Pkt.WriteChar(a_Window.GetWindowID());
	Pkt.WriteShort(a_Property);
	Pkt.WriteShort(a_Value);
}





void cProtocol172::AddReceivedData(const char * a_Data, int a_Size)
{
	if (!m_ReceivedData.Write(a_Data, a_Size))
	{
		// Too much data in the incoming queue, report to caller:
		m_Client->PacketBufferFull();
		return;
	}
	
	// Handle all complete packets:
	while (true)
	{
		UInt32 PacketLen;
		if (!m_ReceivedData.ReadVarInt(PacketLen))
		{
			// Not enough data
			return;
		}
		if (!m_ReceivedData.CanReadBytes(PacketLen))
		{
			// The full packet hasn't been received yet
			return;
		}
		UInt32 PacketType;
		UInt32 Mark1 = m_ReceivedData.GetReadableSpace();
		if (!m_ReceivedData.ReadVarInt(PacketType))
		{
			// Not enough data
			return;
		}

		UInt32 NumBytesRead = Mark1 - m_ReceivedData.GetReadableSpace();
		HandlePacket(PacketType, PacketLen - NumBytesRead);
		
		if (Mark1 - m_ReceivedData.GetReadableSpace() > PacketLen)
		{
			// Read more than packet length, report as error
			m_Client->PacketError(PacketType);
		}

		// Go to packet end in any case:
		m_ReceivedData.ResetRead();
		m_ReceivedData.ReadVarInt(PacketType);
		m_ReceivedData.SkipRead(PacketLen);
		m_ReceivedData.CommitRead();
	}  // while (true)
}




void cProtocol172::HandlePacket(UInt32 a_PacketType, UInt32 a_RemainingBytes)
{
	switch (m_State)
	{
		case 1:
		{
			// Status
			switch (a_PacketType)
			{
				case 0x00: HandlePacketStatusRequest(a_RemainingBytes); return;
				case 0x01: HandlePacketStatusPing   (a_RemainingBytes); return;
			}
			break;
		}
		
		case 2:
		{
			// Login
			switch (a_PacketType)
			{
				case 0x00: HandlePacketLoginStart(a_RemainingBytes); return;
				case 0x01: HandlePacketLoginEncryptionResponse(a_RemainingBytes); return;
			}
			break;
		}
		
		case 3:
		{
			// Game
			switch (a_PacketType)
			{
				case 0x00: HandlePacketKeepAlive              (a_RemainingBytes); return;
				case 0x01: HandlePacketChatMessage            (a_RemainingBytes); return;
				case 0x02: HandlePacketUseEntity              (a_RemainingBytes); return;
				case 0x03: HandlePacketPlayer                 (a_RemainingBytes); return;
				case 0x04: HandlePacketPlayerPos              (a_RemainingBytes); return;
				case 0x05: HandlePacketPlayerLook             (a_RemainingBytes); return;
				case 0x06: HandlePacketPlayerPosLook          (a_RemainingBytes); return;
				case 0x07: HandlePacketBlockDig               (a_RemainingBytes); return;
				case 0x08: HandlePacketBlockPlace             (a_RemainingBytes); return;
				case 0x09: HandlePacketSlotSelect             (a_RemainingBytes); return;
				case 0x0a: HandlePacketAnimation              (a_RemainingBytes); return;
				case 0x0b: HandlePacketEntityAction           (a_RemainingBytes); return;
				case 0x0c: HandlePacketSteerVehicle           (a_RemainingBytes); return;
				case 0x0d: HandlePacketWindowClose            (a_RemainingBytes); return;
				case 0x0e: HandlePacketWindowClick            (a_RemainingBytes); return;
				case 0x0f: // Confirm transaction - not used in MCS
				case 0x10: HandlePacketCreativeInventoryAction(a_RemainingBytes); return;
				case 0x12: HandlePacketUpdateSign             (a_RemainingBytes); return;
				case 0x13: HandlePacketPlayerAbilities        (a_RemainingBytes); return;
				case 0x14: HandlePacketTabComplete            (a_RemainingBytes); return;
				case 0x15: HandlePacketClientSettings         (a_RemainingBytes); return;
				case 0x16: HandlePacketClientStatus           (a_RemainingBytes); return;
				case 0x17: HandlePacketPluginMessage          (a_RemainingBytes); return;
			}
			break;
		}
	}  // switch (m_State)
	
	// Unknown packet type, report to the client:
	m_Client->PacketUnknown(a_PacketType);
	m_ReceivedData.SkipRead(a_RemainingBytes);
	m_ReceivedData.CommitRead();
}





void cProtocol172::HandlePacketStatusPing(UInt32 a_RemainingBytes)
{
	ASSERT(a_RemainingBytes == 8);
	if (a_RemainingBytes != 8)
	{
		m_Client->PacketError(0x01);
		m_ReceivedData.SkipRead(a_RemainingBytes);
		m_ReceivedData.CommitRead();
		return;
	}
	Int64 Timestamp;
	m_ReceivedData.ReadBEInt64(Timestamp);
	m_ReceivedData.CommitRead();
	
	cPacketizer Pkt(*this, 0x01);  // Ping packet
	Pkt.WriteInt64(Timestamp);
}





void cProtocol172::HandlePacketStatusRequest(UInt32 a_RemainingBytes)
{
	// No more bytes in this packet
	ASSERT(a_RemainingBytes == 0);
	m_ReceivedData.CommitRead();
	
	// Send the response:
	AString Response = "{\"version\":{\"name\":\"1.7.2\",\"protocol\":4},\"players\":{";
	AppendPrintf(Response, "\"max\":%u,\"online\":%u,\"sample\":[]},",
		cRoot::Get()->GetServer()->GetMaxPlayers(),
		cRoot::Get()->GetServer()->GetNumPlayers()
	);
	AppendPrintf(Response, "\"description\":{\"text\":\"%s\"}",
		cRoot::Get()->GetServer()->GetDescription().c_str()
	);
	Response.append("}");
	
	cPacketizer Pkt(*this, 0x00);  // Response packet
	Pkt.WriteString(Response);
}





void cProtocol172::HandlePacketLoginEncryptionResponse(UInt32 a_RemainingBytes)
{
	// TODO: Add protocol encryption
}





void cProtocol172::HandlePacketLoginStart(UInt32 a_RemainingBytes)
{
	AString Username;
	m_ReceivedData.ReadVarUTF8String(Username);
	
	// TODO: Protocol encryption should be set up here if not localhost / auth
	
	// Send login success:
	{
		cPacketizer Pkt(*this, 0x02);  // Login success packet
		Pkt.WriteString(Printf("%d", m_Client->GetUniqueID()));  // TODO: proper UUID
		Pkt.WriteString(Username);
	}

	m_State = 3;  // State = Game
	m_Client->HandleLogin(4, Username);
}





void cProtocol172::HandlePacketAnimation(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt, int,  EntityID);
	HANDLE_READ(ReadByte,  Byte, Animation);
	m_Client->HandleAnimation(Animation);
}





void cProtocol172::HandlePacketBlockDig(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadByte,  Byte, Status);
	HANDLE_READ(ReadBEInt, int,  BlockX);
	HANDLE_READ(ReadByte,  Byte, BlockY);
	HANDLE_READ(ReadBEInt, int,  BlockZ);
	HANDLE_READ(ReadByte,  Byte, Face);
	m_Client->HandleLeftClick(BlockX, BlockY, BlockZ, Face, Status);
}





void cProtocol172::HandlePacketBlockPlace(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt, int,  BlockX);
	HANDLE_READ(ReadByte,  Byte, BlockY);
	HANDLE_READ(ReadBEInt, int,  BlockZ);
	HANDLE_READ(ReadByte,  Byte, Face);
	HANDLE_READ(ReadByte,  Byte, CursorX);
	HANDLE_READ(ReadByte,  Byte, CursorY);
	HANDLE_READ(ReadByte,  Byte, CursorZ);
	m_Client->HandleRightClick(BlockX, BlockY, BlockZ, Face, CursorX, CursorY, CursorZ, m_Client->GetPlayer()->GetEquippedItem());
}





void cProtocol172::HandlePacketChatMessage(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadVarUTF8String, AString, Message);
	m_Client->HandleChat(Message);
}





void cProtocol172::HandlePacketClientSettings(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadVarUTF8String, AString, Locale);
	HANDLE_READ(ReadByte,          Byte,    ViewDistance);
	HANDLE_READ(ReadByte,          Byte,    ChatFlags);
	HANDLE_READ(ReadByte,          Byte,    Unused);
	HANDLE_READ(ReadByte,          Byte,    Difficulty);
	HANDLE_READ(ReadByte,          Byte,    ShowCape);
	// TODO: handle in m_Client
}





void cProtocol172::HandlePacketClientStatus(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadByte, Byte, ActionID);
	switch (ActionID)
	{
		case 0:
		{
			// Respawn
			m_Client->HandleRespawn();
			break;
		}
		case 1:
		{
			// Request stats
			// TODO
			break;
		}
		case 2:
		{
			// Open Inventory achievement
			// TODO
			break;
		}
	}
}





void cProtocol172::HandlePacketCreativeInventoryAction(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEShort, short, SlotNum);
	cItem Item;
	if (!ReadItem(Item))
	{
		return;
	}
	m_Client->HandleCreativeInventory(SlotNum, Item);
}





void cProtocol172::HandlePacketEntityAction(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt, int,  PlayerID);
	HANDLE_READ(ReadByte,  Byte, Action);
	HANDLE_READ(ReadBEInt, int,  JumpBoost);
	m_Client->HandleEntityAction(PlayerID, Action);
}





void cProtocol172::HandlePacketKeepAlive(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt, int, KeepAliveID);
	m_Client->HandleKeepAlive(KeepAliveID);
}





void cProtocol172::HandlePacketPlayer(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBool, bool, IsOnGround);
	// TODO: m_Client->HandlePlayerOnGround(IsOnGround);
}





void cProtocol172::HandlePacketPlayerAbilities(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadByte,    Byte,  Flags);
	HANDLE_READ(ReadBEFloat, float, FlyingSpeed);
	HANDLE_READ(ReadBEFloat, float, WalkingSpeed);
	// TODO: m_Client->HandlePlayerAbilities();
}





void cProtocol172::HandlePacketPlayerLook(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEFloat, float, Yaw);
	HANDLE_READ(ReadBEFloat, float, Pitch);
	HANDLE_READ(ReadBool,    bool,  IsOnGround);
	m_Client->HandlePlayerLook(Yaw, Pitch, IsOnGround);
}





void cProtocol172::HandlePacketPlayerPos(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEDouble, double, PosX);
	HANDLE_READ(ReadBEDouble, double, PosY);
	HANDLE_READ(ReadBEDouble, double, Stance);
	HANDLE_READ(ReadBEDouble, double, PosZ);
	HANDLE_READ(ReadBool,     bool,   IsOnGround);
	m_Client->HandlePlayerPos(PosX, PosY, PosZ, Stance, IsOnGround);
}





void cProtocol172::HandlePacketPlayerPosLook(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEDouble, double, PosX);
	HANDLE_READ(ReadBEDouble, double, PosY);
	HANDLE_READ(ReadBEDouble, double, Stance);
	HANDLE_READ(ReadBEDouble, double, PosZ);
	HANDLE_READ(ReadBEFloat,  float,  Yaw);
	HANDLE_READ(ReadBEFloat,  float,  Pitch);
	HANDLE_READ(ReadBool,     bool,   IsOnGround);
	m_Client->HandlePlayerMoveLook(PosX, PosY, PosZ, Stance, Yaw, Pitch, IsOnGround);
}





void cProtocol172::HandlePacketPluginMessage(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadVarUTF8String, AString, Channel);
	HANDLE_READ(ReadBEShort,       short,   Length);
	AString Data;
	m_ReceivedData.ReadString(Data, Length);
	// TODO: m_Client->HandlePluginMessage(Channel, Data);
}





void cProtocol172::HandlePacketSlotSelect(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEShort, short, SlotNum);
	m_Client->HandleSlotSelected(SlotNum);
}





void cProtocol172::HandlePacketSteerVehicle(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEFloat, float, Forward);
	HANDLE_READ(ReadBEFloat, float, Sideways);
	HANDLE_READ(ReadBool,    bool,  ShouldJump);
	HANDLE_READ(ReadBool,    bool,  ShouldUnmount);
	if (ShouldUnmount)
	{
		m_Client->HandleUnmount();
	}
	else
	{
		m_Client->HandleSteerVehicle(Forward, Sideways);
	}
}





void cProtocol172::HandlePacketTabComplete(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadVarUTF8String, AString, Text);
	m_Client->HandleTabCompletion(Text);
}





void cProtocol172::HandlePacketUpdateSign(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt,         int,     BlockX);
	HANDLE_READ(ReadBEShort,       short,   BlockY);
	HANDLE_READ(ReadBEInt,         int,     BlockZ);
	HANDLE_READ(ReadVarUTF8String, AString, Line1);
	HANDLE_READ(ReadVarUTF8String, AString, Line2);
	HANDLE_READ(ReadVarUTF8String, AString, Line3);
	HANDLE_READ(ReadVarUTF8String, AString, Line4);
	m_Client->HandleUpdateSign(BlockX, BlockY, BlockZ, Line1, Line2, Line3, Line4);
}





void cProtocol172::HandlePacketUseEntity(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadBEInt, int,  EntityID);
	HANDLE_READ(ReadByte,  Byte, MouseButton);
	// TODO: Verify that this works, wiki.vg has no info on the MouseButton values
	m_Client->HandleUseEntity(EntityID, (MouseButton == 0));
}





void cProtocol172::HandlePacketWindowClick(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadChar,    char,  WindowID);
	HANDLE_READ(ReadBEShort, short, SlotNum);
	HANDLE_READ(ReadByte,    Byte,  Button);
	HANDLE_READ(ReadBEShort, short, TransactionID);
	HANDLE_READ(ReadByte,    Byte,  Mode);
	cItem Item;
	ReadItem(Item);

	// Convert Button, Mode, SlotNum and HeldItem into eClickAction:
	eClickAction Action;
	switch ((Mode << 8) | Button)
	{
		case 0x0000: Action = (SlotNum != -999) ? caLeftClick  : caLeftClickOutside;  break;
		case 0x0001: Action = (SlotNum != -999) ? caRightClick : caRightClickOutside; break;
		case 0x0100: Action = caShiftLeftClick;  break;
		case 0x0101: Action = caShiftRightClick; break;
		case 0x0200: Action = caNumber1;         break;
		case 0x0201: Action = caNumber2;         break;
		case 0x0202: Action = caNumber3;         break;
		case 0x0203: Action = caNumber4;         break;
		case 0x0204: Action = caNumber5;         break;
		case 0x0205: Action = caNumber6;         break;
		case 0x0206: Action = caNumber7;         break;
		case 0x0207: Action = caNumber8;         break;
		case 0x0208: Action = caNumber9;         break;
		case 0x0300: Action = caMiddleClick;     break;
		case 0x0400: Action = (SlotNum == -999) ? caLeftClickOutsideHoldNothing  : caDropKey;     break;
		case 0x0401: Action = (SlotNum == -999) ? caRightClickOutsideHoldNothing : caCtrlDropKey; break;
		case 0x0500: Action = (SlotNum == -999) ? caLeftPaintBegin               : caUnknown;     break;
		case 0x0501: Action = (SlotNum != -999) ? caLeftPaintProgress            : caUnknown;     break;
		case 0x0502: Action = (SlotNum == -999) ? caLeftPaintEnd                 : caUnknown;     break;
		case 0x0504: Action = (SlotNum == -999) ? caRightPaintBegin              : caUnknown;     break;
		case 0x0505: Action = (SlotNum != -999) ? caRightPaintProgress           : caUnknown;     break;
		case 0x0506: Action = (SlotNum == -999) ? caRightPaintEnd                : caUnknown;     break;
		case 0x0600: Action = caDblClick; break;
	}

	m_Client->HandleWindowClick(WindowID, SlotNum, Action, Item);
}





void cProtocol172::HandlePacketWindowClose(UInt32 a_RemainingBytes)
{
	HANDLE_READ(ReadChar, char, WindowID);
	m_Client->HandleWindowClose(WindowID);
}





void cProtocol172::WritePacket(cByteBuffer & a_Packet)
{
	cCSLock Lock(m_CSPacket);
	AString Pkt;
	a_Packet.ReadAll(Pkt);
	WriteVarInt(Pkt.size());
	SendData(Pkt.data(), Pkt.size());
	Flush();
}





void cProtocol172::SendData(const char * a_Data, int a_Size)
{
	if (m_IsEncrypted)
	{
		byte Encrypted[8192];  // Larger buffer, we may be sending lots of data (chunks)
		while (a_Size > 0)
		{
			int NumBytes = (a_Size > sizeof(Encrypted)) ? sizeof(Encrypted) : a_Size;
			m_Encryptor.ProcessData(Encrypted, (byte *)a_Data, NumBytes);
			m_Client->SendData((const char *)Encrypted, NumBytes);
			a_Size -= NumBytes;
			a_Data += NumBytes;
		}
	}
	else
	{
		m_Client->SendData(a_Data, a_Size);
	}
}






bool cProtocol172::ReadItem(cItem & a_Item)
{
	HANDLE_PACKET_READ(ReadBEShort, short, ItemType);
	if (ItemType == -1)
	{
		// The item is empty, no more data follows
		a_Item.Empty();
		return true;
	}
	a_Item.m_ItemType = ItemType;
	
	HANDLE_PACKET_READ(ReadChar,    char,  ItemCount);
	HANDLE_PACKET_READ(ReadBEShort, short, ItemDamage);
	a_Item.m_ItemCount  = ItemCount;
	a_Item.m_ItemDamage = ItemDamage;
	if (ItemCount <= 0)
	{
		a_Item.Empty();
	}

	HANDLE_PACKET_READ(ReadBEShort, short, MetadataLength);
	if (MetadataLength <= 0)
	{
		return true;
	}
	
	// Read the metadata
	AString Metadata;
	if (!m_ReceivedData.ReadString(Metadata, MetadataLength))
	{
		return false;
	}
	
	ParseItemMetadata(a_Item, Metadata);
	return true;
}





void cProtocol172::ParseItemMetadata(cItem & a_Item, const AString & a_Metadata)
{
	// Uncompress the GZIPped data:
	AString Uncompressed;
	if (UncompressStringGZIP(a_Metadata.data(), a_Metadata.size(), Uncompressed) != Z_OK)
	{
		AString HexDump;
		CreateHexDump(HexDump, a_Metadata.data(), a_Metadata.size(), 16);
		LOGWARNING("Cannot unGZIP item metadata (%u bytes):\n%s", a_Metadata.size(), HexDump.c_str());
		return;
	}
	
	// Parse into NBT:
	cParsedNBT NBT(Uncompressed.data(), Uncompressed.size());
	if (!NBT.IsValid())
	{
		AString HexDump;
		CreateHexDump(HexDump, Uncompressed.data(), Uncompressed.size(), 16);
		LOGWARNING("Cannot parse NBT item metadata: (%u bytes)\n%s", Uncompressed.size(), HexDump.c_str());
		return;
	}
	
	// Load enchantments from the NBT:
	for (int tag = NBT.GetFirstChild(NBT.GetRoot()); tag >= 0; tag = NBT.GetNextSibling(tag))
	{
		if (
			(NBT.GetType(tag) == TAG_List) &&
			(
				(NBT.GetName(tag) == "ench") ||
				(NBT.GetName(tag) == "StoredEnchantments")
			)
		)
		{
			a_Item.m_Enchantments.ParseFromNBT(NBT, tag);
		}
	}
}





///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cProtocol172::cPacketizer:

cProtocol172::cPacketizer::~cPacketizer()
{
	AString DataToSend;

	// Send the packet length
	UInt32 PacketLen = m_Out.GetUsedSpace();
	m_Protocol.m_OutPacketLenBuffer.WriteVarInt(PacketLen);
	m_Protocol.m_OutPacketLenBuffer.ReadAll(DataToSend);
	m_Protocol.SendData(DataToSend.data(), DataToSend.size());
	m_Protocol.m_OutPacketLenBuffer.CommitRead();
	
	// Send the packet data:
	m_Out.ReadAll(DataToSend);
	m_Protocol.SendData(DataToSend.data(), DataToSend.size());
	m_Out.CommitRead();
}





void cProtocol172::cPacketizer::WriteItem(const cItem & a_Item)
{
	short ItemType = a_Item.m_ItemType;
	ASSERT(ItemType >= -1);  // Check validity of packets in debug runtime
	if (ItemType <= 0)
	{
		// Fix, to make sure no invalid values are sent.
		ItemType = -1;
	}
	
	if (a_Item.IsEmpty())
	{
		WriteShort(-1);
		return;
	}
	
	WriteShort(ItemType);
	WriteByte (a_Item.m_ItemCount);
	WriteShort(a_Item.m_ItemDamage);
	
	if (a_Item.m_Enchantments.IsEmpty())
	{
		WriteShort(-1);
		return;
	}

	// Send the enchantments:
	cFastNBTWriter Writer;
	const char * TagName = (a_Item.m_ItemType == E_ITEM_BOOK) ? "StoredEnchantments" : "ench";
	a_Item.m_Enchantments.WriteToNBTCompound(Writer, TagName);
	Writer.Finish();
	AString Compressed;
	CompressStringGZIP(Writer.GetResult().data(), Writer.GetResult().size(), Compressed);
	WriteShort(Compressed.size());
	WriteBuf(Compressed.data(), Compressed.size());
}





void cProtocol172::cPacketizer::WriteByteAngle(double a_Angle)
{
	WriteByte((char)(255 * a_Angle / 360));
}





void cProtocol172::cPacketizer::WriteFPInt(double a_Value)
{
	int Value = (int)(a_Value * 32);
	WriteInt(Value);
}





void cProtocol172::cPacketizer::WriteEntityMetadata(const cEntity & a_Entity)
{
	// Common metadata:
	Byte Flags = 0;
	if (a_Entity.IsOnFire())
	{
		Flags |= 0x01;
	}
	if (a_Entity.IsCrouched())
	{
		Flags |= 0x02;
	}
	if (a_Entity.IsSprinting())
	{
		Flags |= 0x08;
	}
	if (a_Entity.IsRclking())
	{
		Flags |= 0x10;
	}
	if (a_Entity.IsInvisible())
	{
		Flags |= 0x20;
	}
	WriteByte(0);  // Byte(0) + index 0
	WriteByte(Flags);
	
	switch (a_Entity.GetEntityType())
	{
		case cEntity::etPlayer: break;  // TODO?
		case cEntity::etPickup:
		{
			WriteByte((5 << 5) | 10);  // Slot(5) + index 10
			WriteItem(((const cPickup &)a_Entity).GetItem());
			break;
		}
		case cEntity::etMonster:
		{
			WriteMobMetadata((const cMonster &)a_Entity);
			break;
		}
		// TODO: Other types
	}
}





void cProtocol172::cPacketizer::WriteMobMetadata(const cMonster & a_Mob)
{
	// TODO
}