path: root/src/Protocol/Protocol_1_12.cpp

// Protocol_1_12.cpp

/*
Implements the 1.12 protocol classes:
- release 1.12 protocol (#335)
*/

#include "Globals.h"
#include "Protocol_1_12.h"
#include "ProtocolRecognizer.h"
#include "Packetizer.h"

#include "../Entities/Boat.h"
#include "../Entities/Minecart.h"
#include "../Entities/Pickup.h"
#include "../Entities/Player.h"
#include "../Entities/ItemFrame.h"
#include "../Entities/ArrowEntity.h"
#include "../Entities/FireworkEntity.h"
#include "../Entities/SplashPotionEntity.h"

#include "../Mobs/IncludeAllMonsters.h"

#include "../Root.h"
#include "../Server.h"
#include "../ClientHandle.h"
#include "../Bindings/PluginManager.h"





// The disabled error is intended, since the Metadata have overlapping indexes
// based on the type of the Entity.
//
// IMPORTANT: The enum is used to automate the sequential counting of the
// Metadata indexes. Adding a new enum value causes the following values to
// increase their index. Therefore the ordering of the enum values is VERY important!
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wduplicate-enum"
#endif

namespace Metadata
{
	enum Metadata_Index
	{
		// Entity
		ENTITY_FLAGS,
		ENTITY_AIR,
		ENTITY_CUSTOM_NAME,
		ENTITY_CUSTOM_NAME_VISIBLE,
		ENTITY_SILENT,
		ENTITY_NO_GRAVITY,
		_ENTITY_NEXT,  // Used by descendants

		// Potion
		POTION_THROWN = _ENTITY_NEXT,

		// FallingBlock
		FALLING_BLOCK_POSITION = _ENTITY_NEXT,

		// AreaEffectCloud
		AREA_EFFECT_CLOUD_RADIUS = _ENTITY_NEXT,
		AREA_EFFECT_CLOUD_COLOR,
		AREA_EFFECT_CLOUD_SINGLE_POINT_EFFECT,
		AREA_EFFECT_CLOUD_PARTICLE_ID,
		AREA_EFFECT_CLOUD_PARTICLE_PARAMETER1,
		AREA_EFFECT_CLOUD_PARTICLE_PARAMETER2,

		// Arrow
		ARROW_CRITICAL = _ENTITY_NEXT,
		_ARROW_NEXT,

		// TippedArrow
		TIPPED_ARROW_COLOR = _ARROW_NEXT,

		// Boat
		BOAT_LAST_HIT_TIME = _ENTITY_NEXT,
		BOAT_FORWARD_DIRECTION,
		BOAT_DAMAGE_TAKEN,
		BOAT_TYPE,
		BOAT_RIGHT_PADDLE_TURNING,
		BOAT_LEFT_PADDLE_TURNING,

		// EnderCrystal
		ENDER_CRYSTAL_BEAM_TARGET = _ENTITY_NEXT,
		ENDER_CRYSTAL_SHOW_BOTTOM,

		// Fireball
		_FIREBALL_NEXT = _ENTITY_NEXT,

		// WitherSkull
		WITHER_SKULL_INVULNERABLE = _FIREBALL_NEXT,

		// Fireworks
		FIREWORK_INFO = _ENTITY_NEXT,
		FIREWORK_BOOSTED_ENTITY_ID,  // 1.11.1 only

		// Hanging
		_HANGING_NEXT = _ENTITY_NEXT,

		// ItemFrame
		ITEM_FRAME_ITEM = _HANGING_NEXT,
		ITEM_FRAME_ROTATION,

		// Item
		ITEM_ITEM = _ENTITY_NEXT,

		// Living
		LIVING_ACTIVE_HAND = _ENTITY_NEXT,
		LIVING_HEALTH,
		LIVING_POTION_EFFECT_COLOR,
		LIVING_POTION_EFFECT_AMBIENT,
		LIVING_NUMBER_OF_ARROWS,
		_LIVING_NEXT,

		// Player
		PLAYER_ADDITIONAL_HEARTHS = _LIVING_NEXT,
		PLAYER_SCORE,
		PLAYER_DISPLAYED_SKIN_PARTS,
		PLAYER_MAIN_HAND,

		// ArmorStand
		ARMOR_STAND_STATUS = _LIVING_NEXT,
		ARMOR_STAND_HEAD_ROTATION,
		ARMOR_STAND_BODY_ROTATION,
		ARMOR_STAND_LEFT_ARM_ROTATION,
		ARMOR_STAND_RIGHT_ARM_ROTATION,
		ARMOR_STAND_LEFT_LEG_ROTATION,
		ARMOR_STAND_RIGHT_LEG_ROTATION,

		// Insentient
		INSENTIENT_STATUS = _LIVING_NEXT,
		_INSENTIENT_NEXT,

		// Ambient
		_AMBIENT_NEXT = _INSENTIENT_NEXT,

		// Bat
		BAT_HANGING = _AMBIENT_NEXT,

		// Creature
		_CREATURE_NEXT = _INSENTIENT_NEXT,

		// Ageable
		AGEABLE_BABY = _CREATURE_NEXT,
		_AGEABLE_NEXT,

		// PolarBear
		POLAR_BEAR_STANDING = _AGEABLE_NEXT,

		// Animal
		_ANIMAL_NEXT = _AGEABLE_NEXT,

		// Abstract horse
		ABSTRACT_HORSE_STATUS = _ANIMAL_NEXT,
		ABSTRACT_HORSE_OWNER,
		_ABSTRACT_HORSE_NEXT,

		// Horse
		HORSE_VARIANT = _ABSTRACT_HORSE_NEXT,
		HORSE_ARMOR,

		// Chested horse
		CHESTED_HORSE_CHESTED = _ABSTRACT_HORSE_NEXT,
		_CHESTED_HORSE_NEXT,

		// Llama
		LLAMA_STRENGTH = _CHESTED_HORSE_NEXT,
		LLAMA_CARPET_COLOR,
		LLAMA_VARIANT,

		// Pig
		PIG_HAS_SADDLE = _ANIMAL_NEXT,
		PIG_TOTAL_CARROT_ON_A_STICK_BOOST,  // 1.11.1 only

		// Rabbit
		RABBIT_TYPE = _ANIMAL_NEXT,

		// Sheep
		SHEEP_STATUS = _ANIMAL_NEXT,

		// TameableAnimal
		TAMEABLE_ANIMAL_STATUS = _ANIMAL_NEXT,
		TAMEABLE_ANIMAL_OWNER,
		_TAMEABLE_NEXT,

		// Ocelot
		OCELOT_TYPE = _TAMEABLE_NEXT,

		// Wolf
		WOLF_DAMAGE_TAKEN = _TAMEABLE_NEXT,
		WOLF_BEGGING,
		WOLF_COLLAR_COLOR,

		// Villager
		VILLAGER_PROFESSION = _AGEABLE_NEXT,

		// Golem
		_GOLEM_NEXT = _CREATURE_NEXT,

		// IronGolem
		IRON_GOLEM_PLAYER_CREATED = _GOLEM_NEXT,

		// Shulker
		SHULKER_FACING_DIRECTION = _GOLEM_NEXT,
		SHULKER_ATTACHMENT_FALLING_BLOCK_POSITION,
		SHULKER_SHIELD_HEIGHT,

		// Monster
		_MONSTER_NEXT = _CREATURE_NEXT,

		// Blaze
		BLAZE_ON_FIRE = _MONSTER_NEXT,

		// Creeper
		CREEPER_STATE = _MONSTER_NEXT,
		CREEPER_POWERED,
		CREEPER_IGNITED,

		// Guardian
		GUARDIAN_STATUS = _MONSTER_NEXT,
		GUARDIAN_TARGET,

		// Abstract Skeleton
		ABSTRACT_SKELETON_ARMS_SWINGING = _MONSTER_NEXT,

		// Spider
		SPIDER_CLIMBING = _MONSTER_NEXT,

		// Witch
		WITCH_AGGRESIVE = _MONSTER_NEXT,

		// Wither
		WITHER_FIRST_HEAD_TARGET = _MONSTER_NEXT,
		WITHER_SECOND_HEAD_TARGET,
		WITHER_THIRD_HEAD_TARGET,
		WITHER_INVULNERABLE_TIMER,

		// Zombie
		ZOMBIE_IS_BABY = _MONSTER_NEXT,
		ZOMBIE_UNUSED,  // Was type
		ZOMBIE_HANDS_RISED_UP,
		_ZOMBIE_NEXT,

		// Zombie villager
		ZOMBIE_VILLAGER_CONVERTING = _ZOMBIE_NEXT,
		ZOMBIE_VILLAGER_PROFESSION,

		// Enderman
		ENDERMAN_CARRIED_BLOCK = _MONSTER_NEXT,
		ENDERMAN_SCREAMING,

		// Evocation illager
		EVOKER_SPELL = _MONSTER_NEXT,

		// Vex
		VEX_FLAGS = _MONSTER_NEXT,

		// Vindication illager
		VINDICATOR_FLAGS = _MONSTER_NEXT,

		// EnderDragon
		ENDER_DRAGON_DRAGON_PHASE = _INSENTIENT_NEXT,

		// Flying
		_FLYING_NEXT = _INSENTIENT_NEXT,

		// Ghast
		GHAST_ATTACKING = _FLYING_NEXT,

		// Slime
		SLIME_SIZE = _INSENTIENT_NEXT,

		// Minecart
		MINECART_SHAKING_POWER = _ENTITY_NEXT,
		MINECART_SHAKING_DIRECTION,
		MINECART_SHAKING_MULTIPLIER,
		MINECART_BLOCK_ID_META,
		MINECART_BLOCK_Y,
		MINECART_SHOW_BLOCK,
		_MINECART_NEXT,

		// MinecartCommandBlock
		MINECART_COMMAND_BLOCK_COMMAND = _MINECART_NEXT,
		MINECART_COMMAND_BLOCK_LAST_OUTPUT,

		// MinecartFurnace
		MINECART_FURNACE_POWERED = _MINECART_NEXT,

		// TNTPrimed
		TNT_PRIMED_FUSE_TIME = _ENTITY_NEXT,
	};
}

#ifdef __clang__
#pragma clang diagnostic pop  // Restore ignored clang errors
#endif





#define HANDLE_READ(ByteBuf, Proc, Type, Var) \
	Type Var; \
	if (!ByteBuf.Proc(Var))\
	{\
		return;\
	}





cProtocol_1_12::cProtocol_1_12(cClientHandle * a_Client, const AString & a_ServerAddress, UInt16 a_ServerPort, UInt32 a_State) :
	super(a_Client, a_ServerAddress, a_ServerPort, a_State)
{
}





void cProtocol_1_12::SendSpawnMob(const cMonster & a_Mob)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x03);  // Spawn Mob packet
	Pkt.WriteVarInt32(a_Mob.GetUniqueID());
	// TODO: Bad way to write a UUID, and it's not a true UUID, but this is functional for now.
	Pkt.WriteBEUInt64(0);
	Pkt.WriteBEUInt64(a_Mob.GetUniqueID());
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Mob.GetMobType()));
	Pkt.WriteBEDouble(a_Mob.GetPosX());
	Pkt.WriteBEDouble(a_Mob.GetPosY());
	Pkt.WriteBEDouble(a_Mob.GetPosZ());
	Pkt.WriteByteAngle(a_Mob.GetPitch());
	Pkt.WriteByteAngle(a_Mob.GetHeadYaw());
	Pkt.WriteByteAngle(a_Mob.GetYaw());
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedX() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedY() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Mob.GetSpeedZ() * 400));
	WriteEntityMetadata(Pkt, a_Mob);
	Pkt.WriteBEUInt8(0xff);  // Metadata terminator
}





void cProtocol_1_12::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
{
	int BlockX, BlockY, BlockZ;
	if (!a_ByteBuffer.ReadPosition64(BlockX, BlockY, BlockZ))
	{
		return;
	}

	HANDLE_READ(a_ByteBuffer, ReadVarInt, Int32, Face);
	HANDLE_READ(a_ByteBuffer, ReadVarInt, Int32, Hand);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorX);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorY);
	HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, CursorZ);
	m_Client->HandleRightClick(BlockX, BlockY, BlockZ, FaceIntToBlockFace(Face), FloorC(CursorX * 16), FloorC(CursorY * 16), FloorC(CursorZ * 16), m_Client->GetPlayer()->GetEquippedItem());
}





void cProtocol_1_12::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
	cServer * Server = cRoot::Get()->GetServer();
	AString ServerDescription = Server->GetDescription();
	auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
	auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
	AString Favicon = Server->GetFaviconData();
	cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);

	// Version:
	Json::Value Version;
	Version["name"] = "Cuberite 1.12";
	Version["protocol"] = cProtocolRecognizer::PROTO_VERSION_1_12;

	// Players:
	Json::Value Players;
	Players["online"] = NumPlayers;
	Players["max"] = MaxPlayers;
	// TODO: Add "sample"

	// Description:
	Json::Value Description;
	Description["text"] = ServerDescription.c_str();

	// Create the response:
	Json::Value ResponseValue;
	ResponseValue["version"] = Version;
	ResponseValue["players"] = Players;
	ResponseValue["description"] = Description;
	if (!Favicon.empty())
	{
		ResponseValue["favicon"] = Printf("data:image/png;base64,%s", Favicon.c_str());
	}

	// Serialize the response into a packet:
	Json::FastWriter Writer;
	cPacketizer Pkt(*this, 0x00);  // Response packet
	Pkt.WriteString(Writer.write(ResponseValue));
}





void cProtocol_1_12::WriteEntityMetadata(cPacketizer & a_Pkt, const cEntity & a_Entity)
{
	using namespace Metadata;

	// Common metadata:
	Int8 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;
	}
	a_Pkt.WriteBEUInt8(ENTITY_FLAGS);  // Index
	a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);  // Type
	a_Pkt.WriteBEInt8(Flags);

	switch (a_Entity.GetEntityType())
	{
		case cEntity::etPlayer:
		{
			auto & Player = reinterpret_cast<const cPlayer &>(a_Entity);

			// TODO Set player custom name to their name.
			// Then it's possible to move the custom name of mobs to the entities
			// and to remove the "special" player custom name.
			a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_STRING);
			a_Pkt.WriteString(Player.GetName());

			a_Pkt.WriteBEUInt8(LIVING_HEALTH);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(Player.GetHealth()));

			a_Pkt.WriteBEUInt8(PLAYER_DISPLAYED_SKIN_PARTS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEUInt8(static_cast<UInt8>(Player.GetSkinParts()));

			a_Pkt.WriteBEUInt8(PLAYER_MAIN_HAND);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEUInt8(static_cast<UInt8>(Player.GetMainHand()));
			break;
		}
		case cEntity::etPickup:
		{
			a_Pkt.WriteBEUInt8(ITEM_ITEM);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
			WriteItem(a_Pkt, reinterpret_cast<const cPickup &>(a_Entity).GetItem());
			break;
		}
		case cEntity::etMinecart:
		{
			a_Pkt.WriteBEUInt8(MINECART_SHAKING_POWER);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);

			// The following expression makes Minecarts shake more with less health or higher damage taken
			auto & Minecart = reinterpret_cast<const cMinecart &>(a_Entity);
			auto maxHealth = a_Entity.GetMaxHealth();
			auto curHealth = a_Entity.GetHealth();
			a_Pkt.WriteVarInt32(static_cast<UInt32>((maxHealth - curHealth) * Minecart.LastDamage() * 4));

			a_Pkt.WriteBEUInt8(MINECART_SHAKING_DIRECTION);  // (doesn't seem to effect anything)
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(1);

			a_Pkt.WriteBEUInt8(MINECART_SHAKING_MULTIPLIER);  // or damage taken
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(Minecart.LastDamage() + 10));

			if (Minecart.GetPayload() == cMinecart::mpNone)
			{
				auto & RideableMinecart = reinterpret_cast<const cRideableMinecart &>(Minecart);
				const cItem & MinecartContent = RideableMinecart.GetContent();
				if (!MinecartContent.IsEmpty())
				{
					a_Pkt.WriteBEUInt8(MINECART_BLOCK_ID_META);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
					int Content = MinecartContent.m_ItemType;
					Content |= MinecartContent.m_ItemDamage << 8;
					a_Pkt.WriteVarInt32(static_cast<UInt32>(Content));

					a_Pkt.WriteBEUInt8(MINECART_BLOCK_Y);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
					a_Pkt.WriteVarInt32(static_cast<UInt32>(RideableMinecart.GetBlockHeight()));

					a_Pkt.WriteBEUInt8(MINECART_SHOW_BLOCK);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
					a_Pkt.WriteBool(true);
				}
			}
			else if (Minecart.GetPayload() == cMinecart::mpFurnace)
			{
				a_Pkt.WriteBEUInt8(MINECART_FURNACE_POWERED);
				a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
				a_Pkt.WriteBool(reinterpret_cast<const cMinecartWithFurnace &>(Minecart).IsFueled());
			}
			break;
		}  // case etMinecart

		case cEntity::etProjectile:
		{
			auto & Projectile = reinterpret_cast<const cProjectileEntity &>(a_Entity);
			switch (Projectile.GetProjectileKind())
			{
				case cProjectileEntity::pkArrow:
				{
					a_Pkt.WriteBEUInt8(ARROW_CRITICAL);
					a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
					a_Pkt.WriteBEInt8(reinterpret_cast<const cArrowEntity &>(Projectile).IsCritical() ? 1 : 0);
					break;
				}
				case cProjectileEntity::pkFirework:
				{
					a_Pkt.WriteBEUInt8(FIREWORK_INFO);  // Firework item used for this firework
					a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
					WriteItem(a_Pkt, reinterpret_cast<const cFireworkEntity &>(Projectile).GetItem());

					// FIREWORK_BOOSTED_ENTITY_ID, in 1.11.1 only
					break;
				}
				case cProjectileEntity::pkSplashPotion:
				{
					a_Pkt.WriteBEUInt8(POTION_THROWN);  // Potion item which was thrown
					a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
					WriteItem(a_Pkt, reinterpret_cast<const cSplashPotionEntity &>(Projectile).GetItem());
				}
				default:
				{
					break;
				}
			}
			break;
		}  // case etProjectile

		case cEntity::etMonster:
		{
			WriteMobMetadata(a_Pkt, reinterpret_cast<const cMonster &>(a_Entity));
			break;
		}

		case cEntity::etBoat:
		{
			auto & Boat = reinterpret_cast<const cBoat &>(a_Entity);

			a_Pkt.WriteBEInt8(BOAT_LAST_HIT_TIME);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetLastDamage()));

			a_Pkt.WriteBEInt8(BOAT_FORWARD_DIRECTION);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetForwardDirection()));

			a_Pkt.WriteBEInt8(BOAT_DAMAGE_TAKEN);
			a_Pkt.WriteBEInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(Boat.GetDamageTaken());

			a_Pkt.WriteBEInt8(BOAT_TYPE);
			a_Pkt.WriteBEInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Boat.GetMaterial()));

			a_Pkt.WriteBEInt8(BOAT_RIGHT_PADDLE_TURNING);
			a_Pkt.WriteBEInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Boat.IsRightPaddleUsed());

			a_Pkt.WriteBEInt8(BOAT_LEFT_PADDLE_TURNING);
			a_Pkt.WriteBEInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Boat.IsLeftPaddleUsed());

			break;
		}  // case etBoat

		case cEntity::etItemFrame:
		{
			auto & Frame = reinterpret_cast<const cItemFrame &>(a_Entity);
			a_Pkt.WriteBEUInt8(ITEM_FRAME_ITEM);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_ITEM);
			WriteItem(a_Pkt, Frame.GetItem());
			a_Pkt.WriteBEUInt8(ITEM_FRAME_ROTATION);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Frame.GetItemRotation());
			break;
		}  // case etItemFrame

		default:
		{
			break;
		}
	}
}





void cProtocol_1_12::WriteMobMetadata(cPacketizer & a_Pkt, const cMonster & a_Mob)
{
	using namespace Metadata;

	// Living Enitiy Metadata
	if (a_Mob.HasCustomName())
	{
		// TODO: As of 1.9 _all_ entities can have custom names; should this be moved up?
		a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME);
		a_Pkt.WriteBEUInt8(METADATA_TYPE_STRING);
		a_Pkt.WriteString(a_Mob.GetCustomName());

		a_Pkt.WriteBEUInt8(ENTITY_CUSTOM_NAME_VISIBLE);  // Custom name always visible
		a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
		a_Pkt.WriteBool(a_Mob.IsCustomNameAlwaysVisible());
	}

	a_Pkt.WriteBEUInt8(LIVING_HEALTH);
	a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
	a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));

	switch (a_Mob.GetMobType())
	{
		case mtBat:
		{
			auto & Bat = reinterpret_cast<const cBat &>(a_Mob);
			a_Pkt.WriteBEUInt8(BAT_HANGING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(Bat.IsHanging() ? 1 : 0);
			break;
		}  // case mtBat

		case mtCreeper:
		{
			auto & Creeper = reinterpret_cast<const cCreeper &>(a_Mob);
			a_Pkt.WriteBEUInt8(CREEPER_STATE);  // (idle or "blowing")
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Creeper.IsBlowing() ? 1 : static_cast<UInt32>(-1));

			a_Pkt.WriteBEUInt8(CREEPER_POWERED);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Creeper.IsCharged());

			a_Pkt.WriteBEUInt8(CREEPER_IGNITED);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Creeper.IsBurnedWithFlintAndSteel());
			break;
		}  // case mtCreeper

		case mtEnderman:
		{
			auto & Enderman = reinterpret_cast<const cEnderman &>(a_Mob);
			a_Pkt.WriteBEUInt8(ENDERMAN_CARRIED_BLOCK);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BLOCKID);
			UInt32 Carried = 0;
			Carried |= static_cast<UInt32>(Enderman.GetCarriedBlock() << 4);
			Carried |= Enderman.GetCarriedMeta();
			a_Pkt.WriteVarInt32(Carried);

			a_Pkt.WriteBEUInt8(ENDERMAN_SCREAMING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Enderman.IsScreaming());
			break;
		}  // case mtEnderman

		case mtGhast:
		{
			auto & Ghast = reinterpret_cast<const cGhast &>(a_Mob);
			a_Pkt.WriteBEUInt8(GHAST_ATTACKING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Ghast.IsCharging());
			break;
		}  // case mtGhast

		case mtHorse:
		{
			// XXX This behaves incorrectly with different varients; horses have different entity IDs now

			// Abstract horse
			auto & Horse = reinterpret_cast<const cHorse &>(a_Mob);
			Int8 Flags = 0;
			if (Horse.IsTame())
			{
				Flags |= 0x02;
			}
			if (Horse.IsSaddled())
			{
				Flags |= 0x04;
			}
			if (Horse.IsChested())
			{
				Flags |= 0x08;
			}
			if (Horse.IsEating())
			{
				Flags |= 0x20;
			}
			if (Horse.IsRearing())
			{
				Flags |= 0x40;
			}
			if (Horse.IsMthOpen())
			{
				Flags |= 0x80;
			}
			a_Pkt.WriteBEUInt8(ABSTRACT_HORSE_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(Flags);

			// This doesn't exist any more; it'll cause horses to all be the normal type
			// a_Pkt.WriteBEUInt8(HORSE_TYPE);
			// a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			// a_Pkt.WriteVarInt32(static_cast<UInt32>(Horse.GetHorseType()));

			// Regular horses
			a_Pkt.WriteBEUInt8(HORSE_VARIANT);  // Color / style
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			int Appearance = 0;
			Appearance = Horse.GetHorseColor();
			Appearance |= Horse.GetHorseStyle() << 8;
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Appearance));

			a_Pkt.WriteBEUInt8(HORSE_ARMOR);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Horse.GetHorseArmour()));

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Horse.IsBaby());
			break;
		}  // case mtHorse

		case mtMagmaCube:
		{
			auto & MagmaCube = reinterpret_cast<const cMagmaCube &>(a_Mob);
			a_Pkt.WriteBEUInt8(SLIME_SIZE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(MagmaCube.GetSize()));
			break;
		}  // case mtMagmaCube

		case mtOcelot:
		{
			auto & Ocelot = reinterpret_cast<const cOcelot &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Ocelot.IsBaby());

			Int8 OcelotStatus = 0;
			if (Ocelot.IsSitting())
			{
				OcelotStatus |= 0x1;
			}
			if (Ocelot.IsTame())
			{
				OcelotStatus |= 0x4;
			}
			a_Pkt.WriteBEUInt8(TAMEABLE_ANIMAL_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(OcelotStatus);

			a_Pkt.WriteBEUInt8(OCELOT_TYPE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Ocelot.GetOcelotType()));

			break;
		}  // case mtOcelot

		case mtCow:
		{
			auto & Cow = reinterpret_cast<const cCow &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Cow.IsBaby());
			break;
		}  // case mtCow

		case mtChicken:
		{
			auto & Chicken = reinterpret_cast<const cChicken &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Chicken.IsBaby());
			break;
		}  // case mtChicken

		case mtPig:
		{
			auto & Pig = reinterpret_cast<const cPig &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Pig.IsBaby());

			a_Pkt.WriteBEUInt8(PIG_HAS_SADDLE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Pig.IsSaddled());

			// PIG_TOTAL_CARROT_ON_A_STICK_BOOST in 1.11.1 only
			break;
		}  // case mtPig

		case mtSheep:
		{
			auto & Sheep = reinterpret_cast<const cSheep &>(a_Mob);

			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Sheep.IsBaby());

			a_Pkt.WriteBEUInt8(SHEEP_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			Int8 SheepMetadata = 0;
			SheepMetadata = static_cast<Int8>(Sheep.GetFurColor());
			if (Sheep.IsSheared())
			{
				SheepMetadata |= 0x10;
			}
			a_Pkt.WriteBEInt8(SheepMetadata);
			break;
		}  // case mtSheep

		case mtRabbit:
		{
			auto & Rabbit = reinterpret_cast<const cRabbit &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Rabbit.IsBaby());

			a_Pkt.WriteBEUInt8(RABBIT_TYPE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Rabbit.GetRabbitType()));
			break;
		}  // case mtRabbit

		case mtSkeleton:
		{
			// XXX Skeletons are separate entities; all skeletons are currently treated as regular ones

			// auto & Skeleton = reinterpret_cast<const cSkeleton &>(a_Mob);
			// a_Pkt.WriteBEUInt8(SKELETON_TYPE);
			// a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			// a_Pkt.WriteVarInt32(Skeleton.IsWither() ? 1 : 0);
			break;
		}  // case mtSkeleton

		case mtSlime:
		{
			auto & Slime = reinterpret_cast<const cSlime &>(a_Mob);
			a_Pkt.WriteBEUInt8(SLIME_SIZE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Slime.GetSize()));
			break;
		}  // case mtSlime

		case mtVillager:
		{
			auto & Villager = reinterpret_cast<const cVillager &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Villager.IsBaby());

			a_Pkt.WriteBEUInt8(VILLAGER_PROFESSION);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Villager.GetVilType()));
			break;
		}  // case mtVillager

		case mtWitch:
		{
			auto & Witch = reinterpret_cast<const cWitch &>(a_Mob);
			a_Pkt.WriteBEUInt8(WITCH_AGGRESIVE);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Witch.IsAngry());
			break;
		}  // case mtWitch

		case mtWither:
		{
			auto & Wither = reinterpret_cast<const cWither &>(a_Mob);
			a_Pkt.WriteBEUInt8(WITHER_INVULNERABLE_TIMER);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(Wither.GetWitherInvulnerableTicks());

			// TODO: Use boss bar packet for health
			break;
		}  // case mtWither

		case mtWolf:
		{
			auto & Wolf = reinterpret_cast<const cWolf &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Wolf.IsBaby());

			Int8 WolfStatus = 0;
			if (Wolf.IsSitting())
			{
				WolfStatus |= 0x1;
			}
			if (Wolf.IsAngry())
			{
				WolfStatus |= 0x2;
			}
			if (Wolf.IsTame())
			{
				WolfStatus |= 0x4;
			}
			a_Pkt.WriteBEUInt8(TAMEABLE_ANIMAL_STATUS);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BYTE);
			a_Pkt.WriteBEInt8(WolfStatus);

			a_Pkt.WriteBEUInt8(WOLF_DAMAGE_TAKEN);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_FLOAT);
			a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));  // TODO Not use the current health

			a_Pkt.WriteBEUInt8(WOLF_BEGGING);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Wolf.IsBegging());

			a_Pkt.WriteBEUInt8(WOLF_COLLAR_COLOR);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			a_Pkt.WriteVarInt32(static_cast<UInt32>(Wolf.GetCollarColor()));
			break;
		}  // case mtWolf

		case mtZombie:
		{
			// XXX Zombies were also split into new sublcasses; this doesn't handle that.
			auto & Zombie = reinterpret_cast<const cZombie &>(a_Mob);
			a_Pkt.WriteBEUInt8(ZOMBIE_IS_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(Zombie.IsBaby());

			// These don't exist
			// a_Pkt.WriteBEUInt8(ZOMBIE_TYPE);
			// a_Pkt.WriteBEUInt8(METADATA_TYPE_VARINT);
			// a_Pkt.WriteVarInt32(Zombie.IsVillagerZombie() ? 1 : 0);

			// a_Pkt.WriteBEUInt8(ZOMBIE_CONVERTING);
			// a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			// a_Pkt.WriteBool(Zombie.IsConverting());
			break;
		}  // case mtZombie

		case mtZombiePigman:
		{
			auto & ZombiePigman = reinterpret_cast<const cZombiePigman &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(ZombiePigman.IsBaby());
			break;
		}  // case mtZombiePigman
	}  // switch (a_Mob.GetType())
}





void cProtocol_1_12::SendEntityRelMove(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x26);  // Entity Relative Move packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// TODO: 1.9 changed these from chars to shorts, meaning that there can be more percision and data.  Other code needs to be updated for that.
	Pkt.WriteBEInt16(a_RelX * 128);
	Pkt.WriteBEInt16(a_RelY * 128);
	Pkt.WriteBEInt16(a_RelZ * 128);
	Pkt.WriteBool(a_Entity.IsOnGround());
}





void cProtocol_1_12::SendEntityRelMoveLook(const cEntity & a_Entity, char a_RelX, char a_RelY, char a_RelZ)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x27);  // Entity Look And Relative Move packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// TODO: 1.9 changed these from chars to shorts, meaning that there can be more percision and data.  Other code needs to be updated for that.
	Pkt.WriteBEInt16(a_RelX * 128);
	Pkt.WriteBEInt16(a_RelY * 128);
	Pkt.WriteBEInt16(a_RelZ * 128);
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
	Pkt.WriteBool(a_Entity.IsOnGround());
}





void cProtocol_1_12::SendEntityLook(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x28);  // Entity Look packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
	Pkt.WriteBool(a_Entity.IsOnGround());
}





void cProtocol_1_12::SendDestroyEntity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x31);  // Destroy Entities packet
	Pkt.WriteVarInt32(1);
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12::SendRemoveEntityEffect(const cEntity & a_Entity, int a_EffectID)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x32);  // Remove entity effect packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_EffectID));
}





void cProtocol_1_12::SendRespawn(eDimension a_Dimension)
{
	cPacketizer Pkt(*this, 0x34);  // Respawn packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEInt32(static_cast<Int32>(a_Dimension));
	Pkt.WriteBEUInt8(2);  // TODO: Difficulty (set to Normal)
	Pkt.WriteBEUInt8(static_cast<Byte>(Player->GetEffectiveGameMode()));
	Pkt.WriteString("default");
}





void cProtocol_1_12::SendEntityHeadLook(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x35);  // Entity Head Look packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteByteAngle(a_Entity.GetHeadYaw());
}





void cProtocol_1_12::SendCameraSetTo(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x38);  // Camera Packet (Attach the camera of a player at another entity in spectator mode)
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12::SendDisplayObjective(const AString & a_Objective, cScoreboard::eDisplaySlot a_Display)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3a);  // Display scoreboard packet
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_Display));
	Pkt.WriteString(a_Objective);
}





void cProtocol_1_12::SendEntityMetadata(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3b);  // Entity Metadata packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	WriteEntityMetadata(Pkt, a_Entity);
	Pkt.WriteBEUInt8(0xff);  // The termination byte
}





void cProtocol_1_12::SendEntityVelocity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3d);  // Entity Velocity packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// 400 = 8000 / 20 ... Conversion from our speed in m / s to 8000 m / tick
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedX() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedY() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedZ() * 400));
}





void cProtocol_1_12::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3e);  // Entity Equipment packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// Needs to be adjusted due to the insertion of offhand at slot 1
	if (a_SlotNum > 0)
	{
		a_SlotNum++;
	}
	Pkt.WriteVarInt32(static_cast<UInt32>(a_SlotNum));
	WriteItem(Pkt, a_Item);
}





void cProtocol_1_12::SendExperience(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3f);  // Set Experience Packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEFloat(Player->GetXpPercentage());
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetXpLevel()));
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetCurrentXp()));
}





void cProtocol_1_12::SendHealth(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x40);  // Update Health packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEFloat(static_cast<float>(Player->GetHealth()));
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetFoodLevel()));
	Pkt.WriteBEFloat(static_cast<float>(Player->GetFoodSaturationLevel()));
}





void cProtocol_1_12::SendScoreboardObjective(const AString & a_Name, const AString & a_DisplayName, Byte a_Mode)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x41);  // Scoreboard objective packet
	Pkt.WriteString(a_Name);
	Pkt.WriteBEUInt8(a_Mode);
	if ((a_Mode == 0) || (a_Mode == 2))
	{
		Pkt.WriteString(a_DisplayName);
		Pkt.WriteString("integer");
	}
}





void cProtocol_1_12::SendAttachEntity(const cEntity & a_Entity, const cEntity & a_Vehicle)
{
	ASSERT(m_State == 3);  // In game mode?
	cPacketizer Pkt(*this, 0x42);  // Set Passengers packet
	Pkt.WriteVarInt32(a_Vehicle.GetUniqueID());
	Pkt.WriteVarInt32(1);  // 1 passenger
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12::SendDetachEntity(const cEntity & a_Entity, const cEntity & a_PreviousVehicle)
{
	ASSERT(m_State == 3);  // In game mode?
	cPacketizer Pkt(*this, 0x42);  // Set Passengers packet
	Pkt.WriteVarInt32(a_PreviousVehicle.GetUniqueID());
	Pkt.WriteVarInt32(0);  // No passangers
}





void cProtocol_1_12::SendScoreUpdate(const AString & a_Objective, const AString & a_Player, cObjective::Score a_Score, Byte a_Mode)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x44);  // Update score packet
	Pkt.WriteString(a_Player);
	Pkt.WriteBEUInt8(a_Mode);
	Pkt.WriteString(a_Objective);

	if (a_Mode != 1)
	{
		Pkt.WriteVarInt32(static_cast<UInt32>(a_Score));
	}
}





void cProtocol_1_12::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
{
	// Send the Join Game packet:
	{
		cServer * Server = cRoot::Get()->GetServer();
		cPacketizer Pkt(*this, 0x23);  // Join Game packet
		Pkt.WriteBEUInt32(a_Player.GetUniqueID());
		Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0));  // Hardcore flag bit 4
		Pkt.WriteBEInt32(static_cast<Int32>(a_World.GetDimension()));
		Pkt.WriteBEUInt8(2);  // TODO: Difficulty (set to Normal)
		Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
		Pkt.WriteString("default");  // Level type - wtf?
		Pkt.WriteBool(false);  // Reduced Debug Info - wtf?
	}

	// Send the spawn position:
	{
		cPacketizer Pkt(*this, 0x45);  // Spawn Position packet
		Pkt.WritePosition64(FloorC(a_World.GetSpawnX()), FloorC(a_World.GetSpawnY()), FloorC(a_World.GetSpawnZ()));
	}

	// Send the server difficulty:
	{
		cPacketizer Pkt(*this, 0x0d);  // Server difficulty packet
		Pkt.WriteBEInt8(1);
	}

	// Send player abilities:
	SendPlayerAbilities();
}





void cProtocol_1_12::SendUpdateBlockEntity(cBlockEntity & a_BlockEntity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x09);  // Update tile entity packet
	Pkt.WritePosition64(a_BlockEntity.GetPosX(), a_BlockEntity.GetPosY(), a_BlockEntity.GetPosZ());

	Byte Action = 0;
	switch (a_BlockEntity.GetBlockType())
	{
		case E_BLOCK_MOB_SPAWNER:   Action = 1;  break;  // Update mob spawner spinny mob thing
		case E_BLOCK_COMMAND_BLOCK: Action = 2;  break;  // Update command block text
		case E_BLOCK_BEACON:        Action = 3;  break;  // Update beacon entity
		case E_BLOCK_HEAD:          Action = 4;  break;  // Update Mobhead entity
		case E_BLOCK_FLOWER_POT:    Action = 5;  break;  // Update flower pot
		case E_BLOCK_BED:           Action = 11; break;  // Update bed color
		default: ASSERT(!"Unhandled or unimplemented BlockEntity update request!"); break;
	}
	Pkt.WriteBEUInt8(Action);

	WriteBlockEntity(Pkt, a_BlockEntity);
}





void cProtocol_1_12::HandlePacketCraftingBookData(cByteBuffer & a_ByteBuffer)
{
	a_ByteBuffer.SkipRead(a_ByteBuffer.GetReadableSpace() - 1);
	m_Client->GetPlayer()->SendMessageInfo("The green crafting book feature is not implemented yet.");
}





void cProtocol_1_12::HandlePacketAdvancementTab(cByteBuffer & a_ByteBuffer)
{
	a_ByteBuffer.SkipRead(a_ByteBuffer.GetReadableSpace() - 1);
	m_Client->GetPlayer()->SendMessageInfo("The new advancements are not implemented.");
}





void cProtocol_1_12::SendTimeUpdate(Int64 a_WorldAge, Int64 a_TimeOfDay, bool a_DoDaylightCycle)
{
	ASSERT(m_State == 3);  // In game mode?
	if (!a_DoDaylightCycle)
	{
		// When writing a "-" before the number the client ignores it but it will stop the client-side time expiration.
		a_TimeOfDay = std::min(-a_TimeOfDay, -1LL);
	}

	cPacketizer Pkt(*this, 0x46);  // Time update packet
	Pkt.WriteBEInt64(a_WorldAge);
	Pkt.WriteBEInt64(a_TimeOfDay);
}





void cProtocol_1_12::SendSetRawTitle(const AString & a_Title)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x47);  // Title packet
	Pkt.WriteVarInt32(0);  // Set title

	Pkt.WriteString(a_Title);
}





void cProtocol_1_12::SendSetRawSubTitle(const AString & a_SubTitle)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x47);  // Title packet
	Pkt.WriteVarInt32(1);  // Set subtitle

	Pkt.WriteString(a_SubTitle);
}





void cProtocol_1_12::SendTitleTimes(int a_FadeInTicks, int a_DisplayTicks, int a_FadeOutTicks)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x47);  // Title packet
	Pkt.WriteVarInt32(3);  // Set title display times
	Pkt.WriteBEInt32(a_FadeInTicks);
	Pkt.WriteBEInt32(a_DisplayTicks);
	Pkt.WriteBEInt32(a_FadeOutTicks);
}





void cProtocol_1_12::SendHideTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x47);  // Title packet
	Pkt.WriteVarInt32(4);  // Hide title
}





void cProtocol_1_12::SendResetTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x47);  // Title packet
	Pkt.WriteVarInt32(5);  // Reset title
}





void cProtocol_1_12::SendCollectEntity(const cEntity & a_Entity, const cPlayer & a_Player, int a_Count)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4a);  // Collect Item packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteVarInt32(a_Player.GetUniqueID());
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Count));
}





void cProtocol_1_12::SendTeleportEntity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4b);  // Entity teleport packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEDouble(a_Entity.GetPosX());
	Pkt.WriteBEDouble(a_Entity.GetPosY());
	Pkt.WriteBEDouble(a_Entity.GetPosZ());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
	Pkt.WriteBool(a_Entity.IsOnGround());
}





void cProtocol_1_12::SendEntityProperties(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?


	cPacketizer Pkt(*this, 0x4d);  // Entity Properties packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	WriteEntityProperties(Pkt, a_Entity);
}





void cProtocol_1_12::SendPlayerMaxSpeed(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4d);  // Entity Properties
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteVarInt32(Player->GetUniqueID());
	Pkt.WriteBEInt32(1);  // Count
	Pkt.WriteString("generic.movementSpeed");
	// The default game speed is 0.1, multiply that value by the relative speed:
	Pkt.WriteBEDouble(0.1 * Player->GetNormalMaxSpeed());
	if (Player->IsSprinting())
	{
		Pkt.WriteVarInt32(1);  // Modifier count
		Pkt.WriteBEUInt64(0x662a6b8dda3e4c1c);
		Pkt.WriteBEUInt64(0x881396ea6097278d);  // UUID of the modifier
		Pkt.WriteBEDouble(Player->GetSprintingMaxSpeed() - Player->GetNormalMaxSpeed());
		Pkt.WriteBEUInt8(2);
	}
	else
	{
		Pkt.WriteVarInt32(0);  // Modifier count
	}
}





void cProtocol_1_12::SendEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4e);  // Entity Effect packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_EffectID));
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_Amplifier));
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Duration));
	Pkt.WriteBool(false);  // Hide particles
}





bool cProtocol_1_12::HandlePacket(cByteBuffer & a_ByteBuffer, UInt32 a_PacketType)
{
	switch (m_State)
	{
		case 1:
		{
			// Status
			switch (a_PacketType)
			{
				case 0x00: HandlePacketStatusRequest(a_ByteBuffer); return true;
				case 0x01: HandlePacketStatusPing(a_ByteBuffer); return true;
			}
			break;
		}

		case 2:
		{
			// Login
			switch (a_PacketType)
			{
				case 0x00: HandlePacketLoginStart(a_ByteBuffer); return true;
				case 0x01: HandlePacketLoginEncryptionResponse(a_ByteBuffer); return true;
			}
			break;
		}

		case 3:
		{
			// Game
			switch (a_PacketType)
			{
				case 0x00: HandleConfirmTeleport(a_ByteBuffer); return true;
				case 0x01: break;  // Prepare Crafting Grid, not yet implemented
				case 0x02: HandlePacketTabComplete(a_ByteBuffer); return true;
				case 0x03: HandlePacketChatMessage(a_ByteBuffer); return true;
				case 0x04: HandlePacketClientStatus(a_ByteBuffer); return true;
				case 0x05: HandlePacketClientSettings(a_ByteBuffer); return true;
				case 0x06: break;  // Confirm transaction - not used in Cuberite
				case 0x07: HandlePacketEnchantItem(a_ByteBuffer); return true;
				case 0x08: HandlePacketWindowClick(a_ByteBuffer); return true;
				case 0x09: HandlePacketWindowClose(a_ByteBuffer); return true;
				case 0x0a: HandlePacketPluginMessage(a_ByteBuffer); return true;
				case 0x0b: HandlePacketUseEntity(a_ByteBuffer); return true;
				case 0x0c: HandlePacketKeepAlive(a_ByteBuffer); return true;
				case 0x0d: HandlePacketPlayer(a_ByteBuffer); return true;
				case 0x0e: HandlePacketPlayerPos(a_ByteBuffer); return true;
				case 0x0f: HandlePacketPlayerPosLook(a_ByteBuffer); return true;
				case 0x10: HandlePacketPlayerLook(a_ByteBuffer); return true;
				case 0x11: HandlePacketVehicleMove(a_ByteBuffer); return true;
				case 0x12: HandlePacketBoatSteer(a_ByteBuffer); return true;
				case 0x13: HandlePacketPlayerAbilities(a_ByteBuffer); return true;
				case 0x14: HandlePacketBlockDig(a_ByteBuffer); return true;
				case 0x15: HandlePacketEntityAction(a_ByteBuffer); return true;
				case 0x16: HandlePacketSteerVehicle(a_ByteBuffer); return true;
				case 0x17: HandlePacketCraftingBookData(a_ByteBuffer); return true;
				case 0x18: break;  // Resource pack status - not yet implemented
				case 0x19: HandlePacketAdvancementTab(a_ByteBuffer); return true;
				case 0x1a: HandlePacketSlotSelect(a_ByteBuffer); return true;
				case 0x1b: HandlePacketCreativeInventoryAction(a_ByteBuffer); return true;
				case 0x1c: HandlePacketUpdateSign(a_ByteBuffer); return true;
				case 0x1d: HandlePacketAnimation(a_ByteBuffer); return true;
				case 0x1e: HandlePacketSpectate(a_ByteBuffer); return true;
				case 0x1f: HandlePacketBlockPlace(a_ByteBuffer); return true;
				case 0x20: HandlePacketUseItem(a_ByteBuffer); return true;
			}
			break;
		}
		default:
		{
			// Received a packet in an unknown state, report:
			LOGWARNING("Received a packet in an unknown protocol state %d. Ignoring further packets.", m_State);

			// Cannot kick the client - we don't know this state and thus the packet number for the kick packet

			// Switch to a state when all further packets are silently ignored:
			m_State = 255;
			return false;
		}
		case 255:
		{
			// This is the state used for "not processing packets anymore" when we receive a bad packet from a client.
			// Do not output anything (the caller will do that for us), just return failure
			return false;
		}
	}  // switch (m_State)

	// Unknown packet type, report to the ClientHandle:
	m_Client->PacketUnknown(a_PacketType);
	return false;
}





cProtocol_1_12_1::cProtocol_1_12_1(cClientHandle * a_Client, const AString & a_ServerAddress, UInt16 a_ServerPort, UInt32 a_State) :
	super(a_Client, a_ServerAddress, a_ServerPort, a_State)
{
}





void cProtocol_1_12_1::HandlePacketStatusRequest(cByteBuffer & a_ByteBuffer)
{
	cServer * Server = cRoot::Get()->GetServer();
	AString ServerDescription = Server->GetDescription();
	auto NumPlayers = static_cast<signed>(Server->GetNumPlayers());
	auto MaxPlayers = static_cast<signed>(Server->GetMaxPlayers());
	AString Favicon = Server->GetFaviconData();
	cRoot::Get()->GetPluginManager()->CallHookServerPing(*m_Client, ServerDescription, NumPlayers, MaxPlayers, Favicon);

	// Version:
	Json::Value Version;
	Version["name"] = "Cuberite 1.12.1";
	Version["protocol"] = cProtocolRecognizer::PROTO_VERSION_1_12_1;

	// Players:
	Json::Value Players;
	Players["online"] = NumPlayers;
	Players["max"] = MaxPlayers;
	// TODO: Add "sample"

	// Description:
	Json::Value Description;
	Description["text"] = ServerDescription.c_str();

	// Create the response:
	Json::Value ResponseValue;
	ResponseValue["version"] = Version;
	ResponseValue["players"] = Players;
	ResponseValue["description"] = Description;
	if (!Favicon.empty())
	{
		ResponseValue["favicon"] = Printf("data:image/png;base64,%s", Favicon.c_str());
	}

	// Serialize the response into a packet:
	Json::FastWriter Writer;
	cPacketizer Pkt(*this, 0x00);  // Response packet
	Pkt.WriteString(Writer.write(ResponseValue));
}





void cProtocol_1_12_1::SendRespawn(eDimension a_Dimension)
{
	cPacketizer Pkt(*this, 0x35);  // Respawn packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEInt32(static_cast<Int32>(a_Dimension));
	Pkt.WriteBEUInt8(2);  // TODO: Difficulty (set to Normal)
	Pkt.WriteBEUInt8(static_cast<Byte>(Player->GetEffectiveGameMode()));
	Pkt.WriteString("default");
}





void cProtocol_1_12_1::SendPlayerListAddPlayer(const cPlayer & a_Player)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2e);  // Player List Item packet
	Pkt.WriteVarInt32(0);
	Pkt.WriteVarInt32(1);
	Pkt.WriteUUID(a_Player.GetUUID());
	Pkt.WriteString(a_Player.GetPlayerListName());

	const Json::Value & Properties = a_Player.GetClientHandle()->GetProperties();
	Pkt.WriteVarInt32(Properties.size());
	for (auto & Node : Properties)
	{
		Pkt.WriteString(Node.get("name", "").asString());
		Pkt.WriteString(Node.get("value", "").asString());
		AString Signature = Node.get("signature", "").asString();
		if (Signature.empty())
		{
			Pkt.WriteBool(false);
		}
		else
		{
			Pkt.WriteBool(true);
			Pkt.WriteString(Signature);
		}
	}

	Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetGameMode()));
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetClientHandle()->GetPing()));
	Pkt.WriteBool(false);
}





void cProtocol_1_12_1::SendPlayerListRemovePlayer(const cPlayer & a_Player)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2e);  // Player List Item packet
	Pkt.WriteVarInt32(4);
	Pkt.WriteVarInt32(1);
	Pkt.WriteUUID(a_Player.GetUUID());
}





void cProtocol_1_12_1::SendPlayerListUpdateGameMode(const cPlayer & a_Player)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2e);  // Player List Item packet
	Pkt.WriteVarInt32(1);
	Pkt.WriteVarInt32(1);
	Pkt.WriteUUID(a_Player.GetUUID());
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetGameMode()));
}





void cProtocol_1_12_1::SendPlayerListUpdatePing(const cPlayer & a_Player)
{
	ASSERT(m_State == 3);  // In game mode?

	auto ClientHandle = a_Player.GetClientHandlePtr();
	if (ClientHandle != nullptr)
	{
		cPacketizer Pkt(*this, 0x2e);  // Player List Item packet
		Pkt.WriteVarInt32(2);
		Pkt.WriteVarInt32(1);
		Pkt.WriteUUID(a_Player.GetUUID());
		Pkt.WriteVarInt32(static_cast<UInt32>(ClientHandle->GetPing()));
	}
}





void cProtocol_1_12_1::SendPlayerListUpdateDisplayName(const cPlayer & a_Player, const AString & a_CustomName)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2e);  // Player List Item packet
	Pkt.WriteVarInt32(3);
	Pkt.WriteVarInt32(1);
	Pkt.WriteUUID(a_Player.GetUUID());

	if (a_CustomName.empty())
	{
		Pkt.WriteBool(false);
	}
	else
	{
		Pkt.WriteBool(true);
		Pkt.WriteString(Printf("{\"text\":\"%s\"}", a_CustomName.c_str()));
	}
}





void cProtocol_1_12_1::SendPlayerAbilities(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2c);  // Player Abilities packet
	Byte Flags = 0;
	cPlayer * Player = m_Client->GetPlayer();
	if (Player->IsGameModeCreative())
	{
		Flags |= 0x01;
		Flags |= 0x08;  // Godmode, used for creative
	}
	if (Player->IsFlying())
	{
		Flags |= 0x02;
	}
	if (Player->CanFly())
	{
		Flags |= 0x04;
	}
	Pkt.WriteBEUInt8(Flags);
	Pkt.WriteBEFloat(static_cast<float>(0.05 * Player->GetFlyingMaxSpeed()));
	Pkt.WriteBEFloat(static_cast<float>(0.1 * Player->GetNormalMaxSpeed()));
}





void cProtocol_1_12_1::SendPlayerMoveLook(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x2f);  // Player Position And Look packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEDouble(Player->GetPosX());
	Pkt.WriteBEDouble(Player->GetPosY());
	Pkt.WriteBEDouble(Player->GetPosZ());
	Pkt.WriteBEFloat(static_cast<float>(Player->GetYaw()));
	Pkt.WriteBEFloat(static_cast<float>(Player->GetPitch()));
	Pkt.WriteBEUInt8(0);
	Pkt.WriteVarInt32(++m_OutstandingTeleportId);

	// This teleport ID hasn't been confirmed yet
	m_IsTeleportIdConfirmed = false;
}





void cProtocol_1_12_1::SendUseBed(const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x30);  // Use bed
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WritePosition64(a_BlockX, a_BlockY, a_BlockZ);
}





void cProtocol_1_12_1::SendDestroyEntity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x32);  // Destroy Entities packet
	Pkt.WriteVarInt32(1);
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12_1::SendRemoveEntityEffect(const cEntity & a_Entity, int a_EffectID)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x33);  // Remove entity effect packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_EffectID));
}





void cProtocol_1_12_1::SendEntityHeadLook(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x36);  // Entity Head Look packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteByteAngle(a_Entity.GetHeadYaw());
}





void cProtocol_1_12_1::SendCameraSetTo(const cEntity & a_Entity)
{
	cPacketizer Pkt(*this, 0x39);  // Camera packet (Attach the camera of a player at another entity in spectator mode)
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12_1::SendDisplayObjective(const AString & a_Objective, cScoreboard::eDisplaySlot a_Display)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3b);  // Display Scoreboard packet
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_Display));
	Pkt.WriteString(a_Objective);
}





void cProtocol_1_12_1::SendEntityMetadata(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3c);  // Entity Metadata packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	WriteEntityMetadata(Pkt, a_Entity);
	Pkt.WriteBEUInt8(0xff);  // The termination byte
}





void cProtocol_1_12_1::SendEntityVelocity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3e);  // Entity Velocity packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// 400 = 8000 / 20 ... Conversion from our speed in m / s to 8000 m / tick
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedX() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedY() * 400));
	Pkt.WriteBEInt16(static_cast<Int16>(a_Entity.GetSpeedZ() * 400));
}





void cProtocol_1_12_1::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x3f);  // Entity Equipment packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	// Needs to be adjusted due to the insertion of offhand at slot 1
	if (a_SlotNum > 0)
	{
		a_SlotNum++;
	}
	Pkt.WriteVarInt32(static_cast<UInt32>(a_SlotNum));
	WriteItem(Pkt, a_Item);
}





void cProtocol_1_12_1::SendExperience(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x40);  // Set Experience packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEFloat(Player->GetXpPercentage());
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetXpLevel()));
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetCurrentXp()));
}





void cProtocol_1_12_1::SendHealth(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x41);  // Update Health packet
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteBEFloat(static_cast<float>(Player->GetHealth()));
	Pkt.WriteVarInt32(static_cast<UInt32>(Player->GetFoodLevel()));
	Pkt.WriteBEFloat(static_cast<float>(Player->GetFoodSaturationLevel()));
}





void cProtocol_1_12_1::SendScoreboardObjective(const AString & a_Name, const AString & a_DisplayName, Byte a_Mode)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x42);  // Scoreboard Objective packet
	Pkt.WriteString(a_Name);
	Pkt.WriteBEUInt8(a_Mode);
	if ((a_Mode == 0) || (a_Mode == 2))
	{
		Pkt.WriteString(a_DisplayName);
		Pkt.WriteString("integer");
	}
}





void cProtocol_1_12_1::SendAttachEntity(const cEntity & a_Entity, const cEntity & a_Vehicle)
{
	ASSERT(m_State == 3);  // In game mode?
	cPacketizer Pkt(*this, 0x43);  // Set Passengers packet
	Pkt.WriteVarInt32(a_Vehicle.GetUniqueID());
	Pkt.WriteVarInt32(1);  // 1 passenger
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}





void cProtocol_1_12_1::SendDetachEntity(const cEntity & a_Entity, const cEntity & a_PreviousVehicle)
{
	ASSERT(m_State == 3);  // In game mode?
	cPacketizer Pkt(*this, 0x43);  // Set Passengers packet
	Pkt.WriteVarInt32(a_PreviousVehicle.GetUniqueID());
	Pkt.WriteVarInt32(0);  // No passangers
}





void cProtocol_1_12_1::SendScoreUpdate(const AString & a_Objective, const AString & a_Player, cObjective::Score a_Score, Byte a_Mode)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x45);  // Update Score packet
	Pkt.WriteString(a_Player);
	Pkt.WriteBEUInt8(a_Mode);
	Pkt.WriteString(a_Objective);

	if (a_Mode != 1)
	{
		Pkt.WriteVarInt32(static_cast<UInt32>(a_Score));
	}
}





void cProtocol_1_12_1::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
{
	// Send the Join Game packet:
	{
		cServer * Server = cRoot::Get()->GetServer();
		cPacketizer Pkt(*this, 0x23);  // Join Game packet
		Pkt.WriteBEUInt32(a_Player.GetUniqueID());
		Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0));  // Hardcore flag bit 4
		Pkt.WriteBEInt32(static_cast<Int32>(a_World.GetDimension()));
		Pkt.WriteBEUInt8(2);  // TODO: Difficulty (set to Normal)
		Pkt.WriteBEUInt8(static_cast<UInt8>(Clamp<size_t>(Server->GetMaxPlayers(), 0, 255)));
		Pkt.WriteString("default");  // Level type - wtf?
		Pkt.WriteBool(false);  // Reduced Debug Info - wtf?
	}

	// Send the spawn position:
	{
		cPacketizer Pkt(*this, 0x46);  // Spawn Position packet
		Pkt.WritePosition64(FloorC(a_World.GetSpawnX()), FloorC(a_World.GetSpawnY()), FloorC(a_World.GetSpawnZ()));
	}

	// Send the server difficulty:
	{
		cPacketizer Pkt(*this, 0x0d);  // Server difficulty packet
		Pkt.WriteBEInt8(1);
	}

	// Send player abilities:
	SendPlayerAbilities();
}





void cProtocol_1_12_1::SendTimeUpdate(Int64 a_WorldAge, Int64 a_TimeOfDay, bool a_DoDaylightCycle)
{
	ASSERT(m_State == 3);  // In game mode?
	if (!a_DoDaylightCycle)
	{
		// When writing a "-" before the number the client ignores it but it will stop the client-side time expiration.
		a_TimeOfDay = std::min(-a_TimeOfDay, -1LL);
	}

	cPacketizer Pkt(*this, 0x47);  // Time update packet
	Pkt.WriteBEInt64(a_WorldAge);
	Pkt.WriteBEInt64(a_TimeOfDay);
}





void cProtocol_1_12_1::SendSetRawTitle(const AString & a_Title)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x48);  // Title packet
	Pkt.WriteVarInt32(0);  // Set title

	Pkt.WriteString(a_Title);
}





void cProtocol_1_12_1::SendSetRawSubTitle(const AString & a_SubTitle)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x48);  // Title packet
	Pkt.WriteVarInt32(1);  // Set subtitle

	Pkt.WriteString(a_SubTitle);
}





void cProtocol_1_12_1::SendTitleTimes(int a_FadeInTicks, int a_DisplayTicks, int a_FadeOutTicks)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x48);  // Title packet
	Pkt.WriteVarInt32(3);  // Set title display times
	Pkt.WriteBEInt32(a_FadeInTicks);
	Pkt.WriteBEInt32(a_DisplayTicks);
	Pkt.WriteBEInt32(a_FadeOutTicks);
}





void cProtocol_1_12_1::SendHideTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x48);  // Title packet
	Pkt.WriteVarInt32(4);  // Hide title
}





void cProtocol_1_12_1::SendResetTitle(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x48);  // Title packet
	Pkt.WriteVarInt32(5);  // Reset title
}





void cProtocol_1_12_1::SendCollectEntity(const cEntity & a_Entity, const cPlayer & a_Player, int a_Count)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4b);  // Collect Item packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteVarInt32(a_Player.GetUniqueID());
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Count));
}





void cProtocol_1_12_1::SendTeleportEntity(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4c);  // Entity teleport packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEDouble(a_Entity.GetPosX());
	Pkt.WriteBEDouble(a_Entity.GetPosY());
	Pkt.WriteBEDouble(a_Entity.GetPosZ());
	Pkt.WriteByteAngle(a_Entity.GetYaw());
	Pkt.WriteByteAngle(a_Entity.GetPitch());
	Pkt.WriteBool(a_Entity.IsOnGround());
}





void cProtocol_1_12_1::SendEntityProperties(const cEntity & a_Entity)
{
	ASSERT(m_State == 3);  // In game mode?


	cPacketizer Pkt(*this, 0x4e);  // Entity Properties packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	WriteEntityProperties(Pkt, a_Entity);
}





void cProtocol_1_12_1::SendEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, short a_Duration)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4f);  // Entity Effect packet
	Pkt.WriteVarInt32(a_Entity.GetUniqueID());
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_EffectID));
	Pkt.WriteBEUInt8(static_cast<UInt8>(a_Amplifier));
	Pkt.WriteVarInt32(static_cast<UInt32>(a_Duration));
	Pkt.WriteBool(false);  // Hide particles
}





void cProtocol_1_12_1::SendPlayerMaxSpeed(void)
{
	ASSERT(m_State == 3);  // In game mode?

	cPacketizer Pkt(*this, 0x4e);  // Entity Properties
	cPlayer * Player = m_Client->GetPlayer();
	Pkt.WriteVarInt32(Player->GetUniqueID());
	Pkt.WriteBEInt32(1);  // Count
	Pkt.WriteString("generic.movementSpeed");
	// The default game speed is 0.1, multiply that value by the relative speed:
	Pkt.WriteBEDouble(0.1 * Player->GetNormalMaxSpeed());
	if (Player->IsSprinting())
	{
		Pkt.WriteVarInt32(1);  // Modifier count
		Pkt.WriteBEUInt64(0x662a6b8dda3e4c1c);
		Pkt.WriteBEUInt64(0x881396ea6097278d);  // UUID of the modifier
		Pkt.WriteBEDouble(Player->GetSprintingMaxSpeed() - Player->GetNormalMaxSpeed());
		Pkt.WriteBEUInt8(2);
	}
	else
	{
		Pkt.WriteVarInt32(0);  // Modifier count
	}
}





bool cProtocol_1_12_1::HandlePacket(cByteBuffer & a_ByteBuffer, UInt32 a_PacketType)
{
	switch (m_State)
	{
		case 1:
		{
			// Status
			switch (a_PacketType)
			{
				case 0x00: HandlePacketStatusRequest(a_ByteBuffer); return true;
				case 0x01: HandlePacketStatusPing(a_ByteBuffer); return true;
			}
			break;
		}

		case 2:
		{
			// Login
			switch (a_PacketType)
			{
				case 0x00: HandlePacketLoginStart(a_ByteBuffer); return true;
				case 0x01: HandlePacketLoginEncryptionResponse(a_ByteBuffer); return true;
			}
			break;
		}

		case 3:
		{
			// Game
			switch (a_PacketType)
			{
				case 0x00: HandleConfirmTeleport(a_ByteBuffer); return true;
				case 0x01: HandlePacketTabComplete(a_ByteBuffer); return true;
				case 0x02: HandlePacketChatMessage(a_ByteBuffer); return true;
				case 0x03: HandlePacketClientStatus(a_ByteBuffer); return true;
				case 0x04: HandlePacketClientSettings(a_ByteBuffer); return true;
				case 0x05: break;  // Confirm transaction - not used in Cuberite
				case 0x06: HandlePacketEnchantItem(a_ByteBuffer); return true;
				case 0x07: HandlePacketWindowClick(a_ByteBuffer); return true;
				case 0x08: HandlePacketWindowClose(a_ByteBuffer); return true;
				case 0x09: HandlePacketPluginMessage(a_ByteBuffer); return true;
				case 0x0a: HandlePacketUseEntity(a_ByteBuffer); return true;
				case 0x0b: HandlePacketKeepAlive(a_ByteBuffer); return true;
				case 0x0c: HandlePacketPlayer(a_ByteBuffer); return true;
				case 0x0d: HandlePacketPlayerPos(a_ByteBuffer); return true;
				case 0x0e: HandlePacketPlayerPosLook(a_ByteBuffer); return true;
				case 0x0f: HandlePacketPlayerLook(a_ByteBuffer); return true;
				case 0x10: HandlePacketVehicleMove(a_ByteBuffer); return true;
				case 0x11: HandlePacketBoatSteer(a_ByteBuffer); return true;
				case 0x12: break;  // Craft Recipe Request - not yet implemented
				case 0x13: HandlePacketPlayerAbilities(a_ByteBuffer); return true;
				case 0x14: HandlePacketBlockDig(a_ByteBuffer); return true;
				case 0x15: HandlePacketEntityAction(a_ByteBuffer); return true;
				case 0x16: HandlePacketSteerVehicle(a_ByteBuffer); return true;
				case 0x17: HandlePacketCraftingBookData(a_ByteBuffer); return true;
				case 0x18: break;  // Resource pack status - not yet implemented
				case 0x19: HandlePacketAdvancementTab(a_ByteBuffer); return true;
				case 0x1a: HandlePacketSlotSelect(a_ByteBuffer); return true;
				case 0x1b: HandlePacketCreativeInventoryAction(a_ByteBuffer); return true;
				case 0x1c: HandlePacketUpdateSign(a_ByteBuffer); return true;
				case 0x1d: HandlePacketAnimation(a_ByteBuffer); return true;
				case 0x1e: HandlePacketSpectate(a_ByteBuffer); return true;
				case 0x1f: HandlePacketBlockPlace(a_ByteBuffer); return true;
				case 0x20: HandlePacketUseItem(a_ByteBuffer); return true;
			}
			break;
		}
		default:
		{
			// Received a packet in an unknown state, report:
			LOGWARNING("Received a packet in an unknown protocol state %d. Ignoring further packets.", m_State);

			// Cannot kick the client - we don't know this state and thus the packet number for the kick packet

			// Switch to a state when all further packets are silently ignored:
			m_State = 255;
			return false;
		}
		case 255:
		{
			// This is the state used for "not processing packets anymore" when we receive a bad packet from a client.
			// Do not output anything (the caller will do that for us), just return failure
			return false;
		}
	}  // switch (m_State)

	// Unknown packet type, report to the ClientHandle:
	m_Client->PacketUnknown(a_PacketType);
	return false;
}