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; \
	do { \
		if (!ByteBuf.Proc(Var))\
		{\
			return;\
		} \
	} while (false)





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::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;
	m_Client->ForgeAugmentServerListPing(ResponseValue);
	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, pktStatusResponse);
	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 = static_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, static_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 = static_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 = static_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(static_cast<const cMinecartWithFurnace &>(Minecart).IsFueled());
			}
			break;
		}  // case etMinecart

		case cEntity::etProjectile:
		{
			auto & Projectile = static_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(static_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, static_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, static_cast<const cSplashPotionEntity &>(Projectile).GetItem());
				}
				default:
				{
					break;
				}
			}
			break;
		}  // case etProjectile

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

		case cEntity::etBoat:
		{
			auto & Boat = static_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 = static_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 = static_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 mtChicken:
		{
			auto & Chicken = static_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 mtCow:
		{
			auto & Cow = static_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 mtCreeper:
		{
			auto & Creeper = static_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 = static_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 = static_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 = static_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 = static_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 = static_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 mtPig:
		{
			auto & Pig = static_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 mtRabbit:
		{
			auto & Rabbit = static_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 mtSheep:
		{
			auto & Sheep = static_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 mtSlime:
		{
			auto & Slime = static_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 = static_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 = static_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 = static_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 = static_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 = static_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 = static_cast<const cZombiePigman &>(a_Mob);
			a_Pkt.WriteBEUInt8(AGEABLE_BABY);
			a_Pkt.WriteBEUInt8(METADATA_TYPE_BOOL);
			a_Pkt.WriteBool(ZombiePigman.IsBaby());
			break;
		}  // case mtZombiePigman

		case mtBlaze:
		case mtEnderDragon:
		case mtGuardian:
		case mtIronGolem:
		case mtSnowGolem:
		case mtSpider:
		{
			// TODO: Mobs with extra fields that aren't implemented
			break;
		}

		case mtMooshroom:
		case mtCaveSpider:
		{
			// Not mentioned on http://wiki.vg/Entities
			break;
		}

		case mtGiant:
		case mtSilverfish:
		case mtSkeleton:
		case mtSquid:
		case mtWitherSkeleton:
		{
			// Mobs with no extra fields
			break;
		}

		case mtInvalidType:
		{
			ASSERT(!"cProtocol_1_12::WriteMobMetadata: Recieved mob of invalid type");
			break;
		}
	}  // switch (a_Mob.GetType())
}





UInt32 cProtocol_1_12::GetPacketID(cProtocol::ePacketType a_Packet)
{
	switch (a_Packet)
	{
		case pktAttachEntity:        return 0x42;
		case pktCameraSetTo:         return 0x38;
		case pktCollectEntity:       return 0x4a;
		case pktDestroyEntity:       return 0x31;
		case pktDisplayObjective:    return 0x3a;
		case pktEntityEffect:        return 0x4e;
		case pktEntityEquipment:     return 0x3e;
		case pktEntityHeadLook:      return 0x35;
		case pktEntityLook:          return 0x28;
		case pktEntityMeta:          return 0x3b;
		case pktEntityProperties:    return 0x4d;
		case pktEntityRelMove:       return 0x26;
		case pktEntityRelMoveLook:   return 0x27;
		case pktEntityVelocity:      return 0x3d;
		case pktExperience:          return 0x3f;
		case pktHeldItemChange:      return 0x39;
		case pktLeashEntity:         return 0x3c;
		case pktPlayerMaxSpeed:      return 0x4d;
		case pktRemoveEntityEffect:  return 0x32;
		case pktResourcePack:        return 0x33;
		case pktRespawn:             return 0x34;
		case pktScoreboardObjective: return 0x41;
		case pktSpawnPosition:       return 0x45;
		case pktTeleportEntity:      return 0x4b;
		case pktTimeUpdate:          return 0x46;
		case pktTitle:               return 0x47;
		case pktUpdateBlockEntity:   return 0x09;
		case pktUpdateHealth:        return 0x40;
		case pktUpdateScore:         return 0x44;

		default: return Super::GetPacketID(a_Packet);
	}
}





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.");
}





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: HandlePacketResourcePackStatus(a_ByteBuffer); return true;
				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)
{
}





UInt32 cProtocol_1_12_1::GetPacketID(ePacketType a_Packet)
{
	switch (a_Packet)
	{
		case pktAttachEntity:        return 0x43;
		case pktCameraSetTo:         return 0x39;
		case pktCollectEntity:       return 0x4b;
		case pktDestroyEntity:       return 0x32;
		case pktDisplayObjective:    return 0x3b;
		case pktEntityEffect:        return 0x4f;
		case pktEntityEquipment:     return 0x3f;
		case pktEntityHeadLook:      return 0x36;
		case pktEntityMeta:          return 0x3c;
		case pktEntityProperties:    return 0x4e;
		case pktEntityVelocity:      return 0x3e;
		case pktExperience:          return 0x40;
		case pktHeldItemChange:      return 0x3a;
		case pktLeashEntity:         return 0x3d;
		case pktPlayerList:          return 0x2e;
		case pktPlayerAbilities:     return 0x2c;
		case pktPlayerMaxSpeed:      return 0x4e;
		case pktPlayerMoveLook:      return 0x2f;
		case pktRemoveEntityEffect:  return 0x33;
		case pktResourcePack:        return 0x34;
		case pktRespawn:             return 0x35;
		case pktScoreboardObjective: return 0x42;
		case pktSpawnPosition:       return 0x46;
		case pktUpdateHealth:        return 0x41;
		case pktUpdateScore:         return 0x45;
		case pktUseBed:              return 0x30;
		case pktTeleportEntity:      return 0x4c;
		case pktTimeUpdate:          return 0x47;
		case pktTitle:               return 0x48;

		default: return Super::GetPacketID(a_Packet);
	}
}





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, pktStatusResponse);
	Pkt.WriteString(Writer.write(ResponseValue));
}





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: HandlePacketResourcePackStatus(a_ByteBuffer); return true;
				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_2:

void cProtocol_1_12_2::HandlePacketKeepAlive(cByteBuffer & a_ByteBuffer)
{
	HANDLE_READ(a_ByteBuffer, ReadBEInt64, Int64, KeepAliveID);
	if (
		(KeepAliveID <= std::numeric_limits<UInt32>::max()) &&
		(KeepAliveID >= 0)
	)
	{
		// The server will only send a UInt32 so any value out of that range shouldn't keep the client alive.
		m_Client->HandleKeepAlive(static_cast<UInt32>(KeepAliveID));
	}
}





void cProtocol_1_12_2::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 1.12.2";
	Version["protocol"] = cProtocolRecognizer::PROTO_VERSION_1_12_2;

	// 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, pktStatusResponse);
	Pkt.WriteString(Writer.write(ResponseValue));
}





void cProtocol_1_12_2::SendKeepAlive(UInt32 a_PingID)
{
	// Drop the packet if the protocol is not in the Game state yet (caused a client crash):
	if (m_State != 3)
	{
		LOGWARNING("Trying to send a KeepAlive packet to a player who's not yet fully logged in (%d). The protocol class prevented the packet.", m_State);
		return;
	}

	cPacketizer Pkt(*this, pktKeepAlive);
	Pkt.WriteBEInt64(a_PingID);
}