1 files changed, 1917 insertions, 0 deletions

diff --git a/src/Protocol/Protocol17x.cpp b/src/Protocol/Protocol17x.cpp
new file mode 100644
index 000000000..628b8e071
--- /dev/null
+++ b/src/Protocol/Protocol17x.cpp
@@ -0,0 +1,1917 @@
+
+// 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/Minecart.h"
+#include "../Entities/FallingBlock.h"
+#include "../Entities/Pickup.h"
+#include "../Entities/Player.h"
+#include "../Mobs/IncludeAllMonsters.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(Printf("{\"text\":\"%s\"}", EscapeString(a_Reason).c_str()));
+}
+
+
+
+
+
+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());
+	Pkt.WriteEntityProperties(a_Entity);
+}
+
+
+
+
+
+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() | (cRoot::Get()->GetServer()->IsHardcore() ? 0x08 : 0)); // Hardcore flag bit 4
+		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.WriteVarInt(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.WriteVarInt(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_IsOnline ? a_Player.GetClientHandle()->GetPing() : 0);
+}
+
+
+
+
+
+void cProtocol172::SendPlayerMaxSpeed(void)
+{
+	cPacketizer Pkt(*this, 0x20);  // Entity Properties
+	Pkt.WriteInt(m_Client->GetPlayer()->GetUniqueID());
+	Pkt.WriteInt(1);  // Count
+	Pkt.WriteString("generic.movementSpeed");
+	Pkt.WriteDouble(0.1);
+	if (m_Client->GetPlayer()->IsSprinting())
+	{
+		Pkt.WriteShort(1);  // Modifier count
+		Pkt.WriteInt64(0x662a6b8dda3e4c1c);
+		Pkt.WriteInt64(0x881396ea6097278d);  // UUID of the modifier
+		Pkt.WriteDouble(0.3);
+		Pkt.WriteByte(2);
+	}
+	else
+	{
+		Pkt.WriteShort(0);  // Modifier count
+	}
+}
+
+
+
+
+
+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.WriteVarInt(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);
+	Pkt.WriteByte(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.WriteVarInt(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.WriteVarInt(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.WriteVarInt(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) ? 1 : 2);  // End rain / begin rain
+		Pkt.WriteFloat(0);  // Unused for weather
+	}
+
+	// TODO: Fade effect, somehow
+}
+
+
+
+
+
+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(const cWindow & a_Window)
+{
+	if (a_Window.GetWindowType() < 0)
+	{
+		// Do not send this packet for player inventory windows
+		return;
+	}
+	
+	cPacketizer Pkt(*this, 0x2d);
+	Pkt.WriteChar(a_Window.GetWindowID());
+	Pkt.WriteChar(a_Window.GetWindowType());
+	Pkt.WriteString(a_Window.GetWindowTitle());
+	Pkt.WriteChar(a_Window.GetNumNonInventorySlots());
+	Pkt.WriteBool(true);
+	if (a_Window.GetWindowType() == cWindow::wtAnimalChest)
+	{
+		Pkt.WriteInt(0);  // TODO: The animal's EntityID
+	}
+}
+
+
+
+
+
+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);
+	m_Client->HandleUseEntity(EntityID, (MouseButton == 1));
+}
+
+
+
+
+
+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::etMinecart:
+		{
+			WriteByte(0x51);
+
+			// The following expression makes Minecarts shake more with less health or higher damage taken
+			// It gets half the maximum health, and takes it away from the current health minus the half health:
+			/* Health: 5 | 3 - (5 - 3) = 1 (shake power)
+			   Health: 3 | 3 - (3 - 3) = 3
+			   Health: 1 | 3 - (1 - 3) = 5
+			*/
+			WriteInt((((a_Entity.GetMaxHealth() / 2) - (a_Entity.GetHealth() - (a_Entity.GetMaxHealth() / 2))) * ((const cMinecart &)a_Entity).LastDamage()) * 4);
+			WriteByte(0x52);
+			WriteInt(1); // Shaking direction, doesn't seem to affect anything
+			WriteByte(0x73);
+			WriteFloat((float)(((const cMinecart &)a_Entity).LastDamage() + 10)); // Damage taken / shake effect multiplyer
+
+			if (((cMinecart &)a_Entity).GetPayload() == cMinecart::mpFurnace)
+			{
+				WriteByte(0x10);
+				WriteByte(((const cMinecartWithFurnace &)a_Entity).IsFueled() ? 1 : 0);
+			}
+			break;
+		}
+		case cEntity::etProjectile:
+		{
+			if (((cProjectileEntity &)a_Entity).GetProjectileKind() == cProjectileEntity::pkArrow)
+			{
+				WriteByte(0x10);
+				WriteByte(((const cArrowEntity &)a_Entity).IsCritical() ? 1 : 0);
+			}
+			break;
+		}
+		case cEntity::etMonster:
+		{
+			WriteMobMetadata((const cMonster &)a_Entity);
+			break;
+		}
+	}
+}
+
+
+
+
+
+void cProtocol172::cPacketizer::WriteMobMetadata(const cMonster & a_Mob)
+{
+	switch (a_Mob.GetMobType())
+	{
+		case cMonster::mtCreeper:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cCreeper &)a_Mob).IsBlowing() ? 1 : -1);
+			WriteByte(0x11);
+			WriteByte(((const cCreeper &)a_Mob).IsCharged() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtBat:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cBat &)a_Mob).IsHanging() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtPig:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cPig &)a_Mob).IsSaddled() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtVillager:
+		{
+			WriteByte(0x50);
+			WriteInt(((const cVillager &)a_Mob).GetVilType());
+			break;
+		}
+		
+		case cMonster::mtZombie:
+		{
+			WriteByte(0x0c);
+			WriteByte(((const cZombie &)a_Mob).IsBaby() ? 1 : 0);
+			WriteByte(0x0d);
+			WriteByte(((const cZombie &)a_Mob).IsVillagerZombie() ? 1 : 0);
+			WriteByte(0x0e);
+			WriteByte(((const cZombie &)a_Mob).IsConverting() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtGhast:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cGhast &)a_Mob).IsCharging());
+			break;
+		}
+		
+		case cMonster::mtWolf:
+		{
+			const cWolf & Wolf = (const cWolf &)a_Mob;
+			Byte WolfStatus = 0;
+			if (Wolf.IsSitting())
+			{
+				WolfStatus |= 0x1;
+			}
+			if (Wolf.IsAngry())
+			{
+				WolfStatus |= 0x2;
+			}
+			if (Wolf.IsTame())
+			{
+				WolfStatus |= 0x4;
+			}
+			WriteByte(0x10);
+			WriteByte(WolfStatus);
+
+			WriteByte(0x72);
+			WriteFloat((float)(a_Mob.GetHealth()));
+			WriteByte(0x13);
+			WriteByte(Wolf.IsBegging() ? 1 : 0);
+			WriteByte(0x14);
+			WriteByte(Wolf.GetCollarColor());
+			break;
+		}
+		
+		case cMonster::mtSheep:
+		{
+			WriteByte(0x10);
+			Byte SheepMetadata = 0;
+			SheepMetadata = ((const cSheep &)a_Mob).GetFurColor();
+			if (((const cSheep &)a_Mob).IsSheared())
+			{
+				SheepMetadata |= 0x10;
+			}
+			WriteByte(SheepMetadata);
+			break;
+		}
+		
+		case cMonster::mtEnderman:
+		{
+			WriteByte(0x10);
+			WriteByte((Byte)(((const cEnderman &)a_Mob).GetCarriedBlock()));
+			WriteByte(0x11);
+			WriteByte((Byte)(((const cEnderman &)a_Mob).GetCarriedMeta()));
+			WriteByte(0x12);
+			WriteByte(((const cEnderman &)a_Mob).IsScreaming() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtSkeleton:
+		{
+			WriteByte(0x0d);
+			WriteByte(((const cSkeleton &)a_Mob).IsWither() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtWitch:
+		{
+			WriteByte(0x15);
+			WriteByte(((const cWitch &)a_Mob).IsAngry() ? 1 : 0);
+			break;
+		}
+		
+		case cMonster::mtSlime:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cSlime &)a_Mob).GetSize());
+			break;
+		}
+		
+		case cMonster::mtMagmaCube:
+		{
+			WriteByte(0x10);
+			WriteByte(((const cMagmaCube &)a_Mob).GetSize());
+			break;
+		}
+		
+		case cMonster::mtHorse:
+		{
+			const cHorse & Horse = (const cHorse &)a_Mob;
+			int Flags = 0;
+			if (Horse.IsTame())
+			{
+				Flags |= 0x02;
+			}
+			if (Horse.IsSaddled())
+			{
+				Flags |= 0x04;
+			}
+			if (Horse.IsChested())
+			{
+				Flags |= 0x08;
+			}
+			if (Horse.IsBaby())
+			{
+				Flags |= 0x10;
+			}
+			if (Horse.IsEating())
+			{
+				Flags |= 0x20;
+			}
+			if (Horse.IsRearing())
+			{
+				Flags |= 0x40;
+			}
+			if (Horse.IsMthOpen())
+			{
+				Flags |= 0x80;
+			}
+			WriteByte(0x50);  // Int at index 16
+			WriteInt(Flags);
+			WriteByte(0x13);  // Byte at index 19
+			WriteByte(Horse.GetHorseType());
+			WriteByte(0x54);  // Int at index 20
+			int Appearance = 0;
+			Appearance = Horse.GetHorseColor();
+			Appearance |= Horse.GetHorseStyle() << 8;
+			WriteInt(Appearance);
+			WriteByte(0x56);  // Int at index 22
+			WriteInt(Horse.GetHorseArmour());
+			break;
+		}
+	}  // switch (a_Mob.GetType())
+}
+
+
+
+
+
+void cProtocol172::cPacketizer::WriteEntityProperties(const cEntity & a_Entity)
+{
+	if (!a_Entity.IsMob())
+	{
+		// No properties for anything else than mobs
+		WriteInt(0);
+		return;
+	}
+	const cMonster & Mob = (const cMonster &)a_Entity;
+
+	// TODO: Send properties and modifiers based on the mob type
+	
+	WriteInt(0);  // NumProperties
+}
+
+
+
+