Protocol_1_8.cpp

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// Protocol_1_8.cpp
 
/*
Implements the 1.8 protocol classes:
    - cProtocol_1_8_0
        - release 1.8 protocol (#47)
*/
 
#include "Globals.h"
#include "Protocol_1_8.h"
#include "main.h"
#include "../mbedTLS++/Sha1Checksum.h"
#include "Packetizer.h"
 
#include "../ClientHandle.h"
#include "../Root.h"
#include "../Server.h"
#include "../World.h"
#include "../EffectID.h"
#include "../StringCompression.h"
#include "../CompositeChat.h"
#include "../UUID.h"
#include "../World.h"
#include "../JsonUtils.h"
 
#include "../WorldStorage/FastNBT.h"
#include "../WorldStorage/EnchantmentSerializer.h"
 
#include "../Entities/ExpOrb.h"
#include "../Entities/Minecart.h"
#include "../Entities/FallingBlock.h"
#include "../Entities/Floater.h"
#include "../Entities/Painting.h"
#include "../Entities/Pickup.h"
#include "../Entities/Player.h"
#include "../Entities/ItemFrame.h"
#include "../Entities/ArrowEntity.h"
#include "../Entities/FireworkEntity.h"
 
#include "../Mobs/IncludeAllMonsters.h"
#include "../UI/Window.h"
#include "../UI/HorseWindow.h"
 
#include "../BlockEntities/BannerEntity.h"
#include "../BlockEntities/BeaconEntity.h"
#include "../BlockEntities/CommandBlockEntity.h"
#include "../BlockEntities/EnchantingTableEntity.h"
#include "../BlockEntities/MobHeadEntity.h"
#include "../BlockEntities/MobSpawnerEntity.h"
#include "../BlockEntities/FlowerPotEntity.h"
#include "../Bindings/PluginManager.h"
 
 
 
 
 
const int MAX_ENC_LEN = 512;  // Maximum size of the encrypted message; should be 128, but who knows...
static const UInt32 CompressionThreshold = 256;  // After how large a packet should we compress it.
 
 
 
 
 
// cProtocol_1_8_0:
 
cProtocol_1_8_0::cProtocol_1_8_0(cClientHandle * a_Client, const AString & a_ServerAddress, State a_State) :
    Super(a_Client),
    m_State(a_State),
    m_ServerAddress(a_ServerAddress),
    m_IsEncrypted(false)
{
    AStringVector Params;
    SplitZeroTerminatedStrings(a_ServerAddress, Params);
 
    if (Params.size() >= 2)
    {
        m_ServerAddress = Params[0];
 
        if (Params[1] == "FML")
        {
            LOGD("Forge client connected!");
            m_Client->SetIsForgeClient();
        }
        else if (Params.size() == 4)
        {
            if (cRoot::Get()->GetServer()->ShouldAllowBungeeCord())
            {
                // BungeeCord handling:
                // If BC is setup with ip_forward == true, it sends additional data in the login packet's ServerAddress field:
                // hostname\00ip-address\00uuid\00profile-properties-as-json
 
                LOGD("Player at %s connected via BungeeCord", Params[1].c_str());
 
                cUUID UUID;
                UUID.FromString(Params[2]);
 
                Json::Value root;
                if (!JsonUtils::ParseString(Params[3], root))
                {
                    LOGERROR("Unable to parse player properties: '%s'", Params[3]);
                    m_Client->ProxyInit(Params[1], UUID);
                }
                else
                {
                    m_Client->ProxyInit(Params[1], UUID, root);
                }
            }
            else
            {
                LOG("BungeeCord is disabled, but client sent additional data, set AllowBungeeCord=1 if you want to allow it");
            }
        }
        else
        {
            LOG("Unknown additional data sent in server address (BungeeCord/FML?): %zu parameters", Params.size());
            // TODO: support FML + BungeeCord? (what parameters does it send in that case?) https://github.com/SpigotMC/BungeeCord/issues/899
        }
    }
 
    // Create the comm log file, if so requested:
    if (g_ShouldLogCommIn || g_ShouldLogCommOut)
    {
        static int sCounter = 0;
        cFile::CreateFolder("CommLogs");
        AString IP(a_Client->GetIPString());
        ReplaceString(IP, ":", "_");
        auto FileName = fmt::format(FMT_STRING("CommLogs/{:x}_{}__{}.log"),
            static_cast<unsigned>(time(nullptr)),
            sCounter++,
            IP.c_str()
        );
        if (!m_CommLogFile.Open(FileName, cFile::fmWrite))
        {
            LOG("Cannot log communication to file, the log file \"%s\" cannot be opened for writing.", FileName.c_str());
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::DataReceived(cByteBuffer & a_Buffer, ContiguousByteBuffer & a_Data)
{
    if (m_IsEncrypted)
    {
        m_Decryptor.ProcessData(a_Data.data(), a_Data.size());
    }
 
    AddReceivedData(a_Buffer, a_Data);
}
 
 
 
 
 
void cProtocol_1_8_0::DataPrepared(ContiguousByteBuffer & a_Data)
{
    if (m_IsEncrypted)
    {
        m_Encryptor.ProcessData(a_Data.data(), a_Data.size());
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendAttachEntity(const cEntity & a_Entity, const cEntity & a_Vehicle)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktAttachEntity);
    Pkt.WriteBEUInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEUInt32(a_Vehicle.GetUniqueID());
    Pkt.WriteBool(false);
}
 
 
 
 
 
void cProtocol_1_8_0::SendBlockAction(Vector3i a_BlockPos, char a_Byte1, char a_Byte2, BLOCKTYPE a_BlockType)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktBlockAction);
    Pkt.WriteXYZPosition64(a_BlockPos);
    Pkt.WriteBEInt8(a_Byte1);
    Pkt.WriteBEInt8(a_Byte2);
    Pkt.WriteVarInt32(a_BlockType);
}
 
 
 
 
 
void cProtocol_1_8_0::SendBlockBreakAnim(UInt32 a_EntityID, Vector3i a_BlockPos, char a_Stage)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktBlockBreakAnim);
    Pkt.WriteVarInt32(a_EntityID);
    Pkt.WriteXYZPosition64(a_BlockPos);
    Pkt.WriteBEInt8(a_Stage);
}
 
 
 
 
 
void cProtocol_1_8_0::SendBlockChange(Vector3i a_BlockPos, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktBlockChange);
    Pkt.WriteXYZPosition64(a_BlockPos);
    Pkt.WriteVarInt32((static_cast<UInt32>(a_BlockType) << 4) | (static_cast<UInt32>(a_BlockMeta) & 15));
}
 
 
 
 
 
void cProtocol_1_8_0::SendBlockChanges(int a_ChunkX, int a_ChunkZ, const sSetBlockVector & a_Changes)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktBlockChanges);
    Pkt.WriteBEInt32(a_ChunkX);
    Pkt.WriteBEInt32(a_ChunkZ);
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Changes.size()));
 
    for (const auto & Change : a_Changes)
    {
        Int16 Coords = static_cast<Int16>(Change.m_RelY | (Change.m_RelZ << 8) | (Change.m_RelX << 12));
        Pkt.WriteBEInt16(Coords);
        Pkt.WriteVarInt32(static_cast<UInt32>(Change.m_BlockType & 0xFFF) << 4 | (Change.m_BlockMeta & 0xF));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarAdd(UInt32 a_UniqueID, const cCompositeChat & a_Title, float a_FractionFilled, BossBarColor a_Color, BossBarDivisionType a_DivisionType, bool a_DarkenSky, bool a_PlayEndMusic, bool a_CreateFog)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarRemove(UInt32 a_UniqueID)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarUpdateFlags(UInt32 a_UniqueID, bool a_DarkenSky, bool a_PlayEndMusic, bool a_CreateFog)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarUpdateHealth(UInt32 a_UniqueID, float a_FractionFilled)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarUpdateStyle(UInt32 a_UniqueID, BossBarColor a_Color, BossBarDivisionType a_DivisionType)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendBossBarUpdateTitle(UInt32 a_UniqueID, const cCompositeChat & a_Title)
{
    // No such packet here
}
 
 
 
 
 
void cProtocol_1_8_0::SendCameraSetTo(const cEntity & a_Entity)
{
    cPacketizer Pkt(*this, pktCameraSetTo);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
}
 
 
 
 
 
void cProtocol_1_8_0::SendChat(const AString & a_Message, eChatType a_Type)
{
    ASSERT(m_State == 3);  // In game mode?
 
    SendChatRaw(JsonUtils::SerializeSingleValueJsonObject("text", a_Message), a_Type);
}
 
 
 
 
 
void cProtocol_1_8_0::SendChat(const cCompositeChat & a_Message, eChatType a_Type, bool a_ShouldUseChatPrefixes)
{
    ASSERT(m_State == 3);  // In game mode?
 
    SendChatRaw(a_Message.CreateJsonString(a_ShouldUseChatPrefixes), a_Type);
}
 
 
 
 
 
void cProtocol_1_8_0::SendChatRaw(const AString & a_MessageRaw, eChatType a_Type)
{
    ASSERT(m_State == 3);  // In game mode?
 
    // Prevent chat messages that might trigger CVE-2021-44228
    if (a_MessageRaw.find("${") != std::string::npos)
    {
        return;
    }
 
    // Send the json string to the client:
    cPacketizer Pkt(*this, pktChatRaw);
    Pkt.WriteString(a_MessageRaw);
    Pkt.WriteBEInt8([a_Type]() -> signed char
    {
        switch (a_Type)
        {
            case eChatType::ctChatBox: return 0;
            case eChatType::ctSystem: return 1;
            case eChatType::ctAboveActionBar: return 2;
        }
        UNREACHABLE("Unsupported chat type");
    }());
}
 
 
 
 
 
void cProtocol_1_8_0::SendChunkData(const ContiguousByteBufferView a_ChunkData)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cCSLock Lock(m_CSPacket);
    m_Client->SendData(a_ChunkData);
}
 
 
 
 
 
void cProtocol_1_8_0::SendCollectEntity(const cEntity & a_Collected, const cEntity & a_Collector, unsigned a_Count)
{
    UNUSED(a_Count);
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktCollectEntity);
    Pkt.WriteVarInt32(a_Collected.GetUniqueID());
    Pkt.WriteVarInt32(a_Collector.GetUniqueID());
}
 
 
 
 
 
void cProtocol_1_8_0::SendDestroyEntity(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    {
        cPacketizer Pkt(*this, pktDestroyEntity);
        Pkt.WriteVarInt32(1);
        Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    }
 
    if (!a_Entity.IsMob())
    {
        return;
    }
 
    const auto & Mob = static_cast<const cMonster &>(a_Entity);
    if ((Mob.GetMobType() == mtEnderDragon) || (Mob.GetMobType() == mtWither))
    {
        SendBossBarRemove(Mob.GetUniqueID());
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendDetachEntity(const cEntity & a_Entity, const cEntity & a_PreviousVehicle)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktAttachEntity);
    Pkt.WriteBEUInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEUInt32(0);
    Pkt.WriteBool(false);
}
 
 
 
 
 
void cProtocol_1_8_0::SendDisconnect(const AString & a_Reason)
{
    switch (m_State)
    {
        case State::Login:
        {
            cPacketizer Pkt(*this, pktDisconnectDuringLogin);
            Pkt.WriteString(JsonUtils::SerializeSingleValueJsonObject("text", a_Reason));
            break;
        }
        case State::Game:
        {
            cPacketizer Pkt(*this, pktDisconnectDuringGame);
            Pkt.WriteString(JsonUtils::SerializeSingleValueJsonObject("text", a_Reason));
            break;
        }
        default:
        {
            FLOGERROR(
                "Tried to send disconnect in invalid game state {0}",
                static_cast<int>(m_State)
            );
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendEditSign(Vector3i a_BlockPos)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEditSign);
    Pkt.WriteXYZPosition64(a_BlockPos);
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityAnimation(const cEntity & a_Entity, const EntityAnimation a_Animation)
{
    ASSERT(m_State == 3);  // In game mode?
 
    if (a_Animation == EntityAnimation::PlayerEntersBed)
    {
        ASSERT(a_Entity.IsPlayer());
        const auto BedPosition = static_cast<const cPlayer &>(a_Entity).GetLastBedPos();
 
        cPacketizer Pkt(*this, pktUseBed);
        Pkt.WriteVarInt32(a_Entity.GetUniqueID());
        Pkt.WriteXYZPosition64(BedPosition.x, BedPosition.y, BedPosition.z);
        return;
    }
 
    if (const auto AnimationID = GetProtocolEntityAnimation(a_Animation); AnimationID != static_cast<unsigned char>(-1))
    {
        cPacketizer Pkt(*this, pktEntityAnimation);
        Pkt.WriteVarInt32(a_Entity.GetUniqueID());
        Pkt.WriteBEUInt8(AnimationID);
        return;
    }
 
    if (const auto StatusID = GetProtocolEntityStatus(a_Animation); StatusID != -1)
    {
        cPacketizer Pkt(*this, pktEntityStatus);
        Pkt.WriteBEUInt32(a_Entity.GetUniqueID());
        Pkt.WriteBEInt8(StatusID);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityEffect(const cEntity & a_Entity, int a_EffectID, int a_Amplifier, int a_Duration)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityEffect);
    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_8_0::SendEntityEquipment(const cEntity & a_Entity, short a_SlotNum, const cItem & a_Item)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityEquipment);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEInt16(a_SlotNum);
    WriteItem(Pkt, a_Item);
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityHeadLook(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityHeadLook);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteByteAngle(a_Entity.GetHeadYaw());
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityLook(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityLook);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteByteAngle(a_Entity.GetYaw());
    Pkt.WriteByteAngle(a_Entity.GetPitch());
    Pkt.WriteBool(a_Entity.IsOnGround());
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityMetadata(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityMeta);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    WriteEntityMetadata(Pkt, a_Entity);
    Pkt.WriteBEUInt8(0x7f);  // The termination byte
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityPosition(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    const auto Delta = (a_Entity.GetPosition() * 32).Floor() - (a_Entity.GetLastSentPosition() * 32).Floor();
 
    // Ensure that the delta has enough precision and is within range of a BEInt8:
    if (
        Delta.HasNonZeroLength() &&
        cByteBuffer::CanBEInt8Represent(Delta.x) &&
        cByteBuffer::CanBEInt8Represent(Delta.y) &&
        cByteBuffer::CanBEInt8Represent(Delta.z)
    )
    {
        const auto Move = static_cast<Vector3<Int8>>(Delta);
 
        // Difference within limitations, use a relative move packet
        if (a_Entity.IsOrientationDirty())
        {
            cPacketizer Pkt(*this, pktEntityRelMoveLook);
            Pkt.WriteVarInt32(a_Entity.GetUniqueID());
            Pkt.WriteBEInt8(Move.x);
            Pkt.WriteBEInt8(Move.y);
            Pkt.WriteBEInt8(Move.z);
            Pkt.WriteByteAngle(a_Entity.GetYaw());
            Pkt.WriteByteAngle(a_Entity.GetPitch());
            Pkt.WriteBool(a_Entity.IsOnGround());
        }
        else
        {
            cPacketizer Pkt(*this, pktEntityRelMove);
            Pkt.WriteVarInt32(a_Entity.GetUniqueID());
            Pkt.WriteBEInt8(Move.x);
            Pkt.WriteBEInt8(Move.y);
            Pkt.WriteBEInt8(Move.z);
            Pkt.WriteBool(a_Entity.IsOnGround());
        }
 
        return;
    }
 
    // Too big or small a movement, do a teleport.
 
    cPacketizer Pkt(*this, pktTeleportEntity);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteFPInt(a_Entity.GetPosX());
    Pkt.WriteFPInt(a_Entity.GetPosY());
    Pkt.WriteFPInt(a_Entity.GetPosZ());
    Pkt.WriteByteAngle(a_Entity.GetYaw());
    Pkt.WriteByteAngle(a_Entity.GetPitch());
    Pkt.WriteBool(a_Entity.IsOnGround());
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityProperties(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityProperties);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    WriteEntityProperties(Pkt, a_Entity);
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntityVelocity(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktEntityVelocity);
    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_8_0::SendExperience(void)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktExperience);
    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_8_0::SendExperienceOrb(const cExpOrb & a_ExpOrb)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSpawnExperienceOrb);
    Pkt.WriteVarInt32(a_ExpOrb.GetUniqueID());
    Pkt.WriteFPInt(a_ExpOrb.GetPosX());
    Pkt.WriteFPInt(a_ExpOrb.GetPosY());
    Pkt.WriteFPInt(a_ExpOrb.GetPosZ());
    Pkt.WriteBEInt16(static_cast<Int16>(a_ExpOrb.GetReward()));
}
 
 
 
 
 
void cProtocol_1_8_0::SendExplosion(const Vector3f a_Position, const float a_Power)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktExplosion);
    Pkt.WriteBEFloat(a_Position.x);
    Pkt.WriteBEFloat(a_Position.y);
    Pkt.WriteBEFloat(a_Position.z);
    Pkt.WriteBEFloat(a_Power);
    Pkt.WriteBEUInt32(0);
    Pkt.WriteBEFloat(0);
    Pkt.WriteBEFloat(0);
    Pkt.WriteBEFloat(0);
}
 
 
 
 
 
void cProtocol_1_8_0::SendGameMode(eGameMode a_GameMode)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktGameMode);
    Pkt.WriteBEUInt8(3);  // Reason: Change game mode
    Pkt.WriteBEFloat(static_cast<float>(a_GameMode));  // The protocol really represents the value with a float!
}
 
 
 
 
 
void cProtocol_1_8_0::SendHealth(void)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktUpdateHealth);
    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_8_0::SendHeldItemChange(int a_ItemIndex)
{
    ASSERT((a_ItemIndex >= 0) && (a_ItemIndex <= 8));  // Valid check
 
    cPacketizer Pkt(*this, pktHeldItemChange);
    Pkt.WriteBEInt8(static_cast<Int8>(a_ItemIndex));
}
 
 
 
 
 
void cProtocol_1_8_0::SendHideTitle(void)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTitle);
    Pkt.WriteVarInt32(3);  // Hide title
}
 
 
 
 
 
void cProtocol_1_8_0::SendInventorySlot(char a_WindowID, short a_SlotNum, const cItem & a_Item)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktInventorySlot);
    Pkt.WriteBEInt8(a_WindowID);
    Pkt.WriteBEInt16(a_SlotNum);
    WriteItem(Pkt, a_Item);
}
 
 
 
 
 
void cProtocol_1_8_0::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.WriteVarInt32(a_PingID);
}
 
 
 
 
 
void cProtocol_1_8_0::SendLeashEntity(const cEntity & a_Entity, const cEntity & a_EntityLeashedTo)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktLeashEntity);
    Pkt.WriteBEUInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEUInt32(a_EntityLeashedTo.GetUniqueID());
    Pkt.WriteBool(true);
}
 
 
 
 
 
void cProtocol_1_8_0::SendUnleashEntity(const cEntity & a_Entity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktLeashEntity);
    Pkt.WriteBEUInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEInt32(-1);
    Pkt.WriteBool(true);
}
 
 
 
 
 
void cProtocol_1_8_0::SendLogin(const cPlayer & a_Player, const cWorld & a_World)
{
    // Send the Join Game packet:
    {
        cServer * Server = cRoot::Get()->GetServer();
        cPacketizer Pkt(*this, pktJoinGame);
        Pkt.WriteBEUInt32(a_Player.GetUniqueID());
        Pkt.WriteBEUInt8(static_cast<UInt8>(a_Player.GetEffectiveGameMode()) | (Server->IsHardcore() ? 0x08 : 0));  // Hardcore flag bit 4
        Pkt.WriteBEInt8(static_cast<Int8>(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, pktSpawnPosition);
        Pkt.WriteXYZPosition64(a_World.GetSpawnX(), a_World.GetSpawnY(), a_World.GetSpawnZ());
    }
 
    // Send the server difficulty:
    {
        cPacketizer Pkt(*this, pktDifficulty);
        Pkt.WriteBEInt8(1);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendLoginSuccess(void)
{
    ASSERT(m_State == 2);  // State: login?
 
    // Enable compression:
    {
        cPacketizer Pkt(*this, pktStartCompression);
        Pkt.WriteVarInt32(CompressionThreshold);
    }
 
    m_State = State::Game;
 
    {
        cPacketizer Pkt(*this, pktLoginSuccess);
        Pkt.WriteString(m_Client->GetUUID().ToLongString());
        Pkt.WriteString(m_Client->GetUsername());
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendPaintingSpawn(const cPainting & a_Painting)
{
    ASSERT(m_State == 3);  // In game mode?
    double PosX = a_Painting.GetPosX();
    double PosY = a_Painting.GetPosY();
    double PosZ = a_Painting.GetPosZ();
 
    cPacketizer Pkt(*this, pktSpawnPainting);
    Pkt.WriteVarInt32(a_Painting.GetUniqueID());
    Pkt.WriteString(a_Painting.GetName());
    Pkt.WriteXYZPosition64(static_cast<Int32>(PosX), static_cast<Int32>(PosY), static_cast<Int32>(PosZ));
    Pkt.WriteBEInt8(static_cast<Int8>(a_Painting.GetProtocolFacing()));
}
 
 
 
 
 
void cProtocol_1_8_0::SendMapData(const cMap & a_Map, int a_DataStartX, int a_DataStartY)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktMapData);
    Pkt.WriteVarInt32(a_Map.GetID());
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Map.GetScale()));
 
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Map.GetDecorators().size()));
    for (const auto & Decorator : a_Map.GetDecorators())
    {
        Pkt.WriteBEUInt8(static_cast<Byte>((static_cast<Int32>(Decorator.GetType()) << 4) | (Decorator.GetRot() & 0xF)));
        Pkt.WriteBEUInt8(static_cast<UInt8>(Decorator.GetPixelX()));
        Pkt.WriteBEUInt8(static_cast<UInt8>(Decorator.GetPixelZ()));
    }
 
    Pkt.WriteBEUInt8(128);
    Pkt.WriteBEUInt8(128);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_DataStartX));
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_DataStartY));
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Map.GetData().size()));
    for (auto itr = a_Map.GetData().cbegin(); itr != a_Map.GetData().cend(); ++itr)
    {
        Pkt.WriteBEUInt8(*itr);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerAbilities(void)
{
    ASSERT(m_State == 3);  // In game mode?
 
    Byte Flags = 0;
    const cPlayer * Player = m_Client->GetPlayer();
 
    if (Player->IsGameModeCreative() || Player->IsGameModeSpectator())
    {
        Flags |= 0x01;  // Invulnerability.
    }
    if (Player->IsFlying())
    {
        Flags |= 0x02;
    }
    if (Player->CanFly())
    {
        Flags |= 0x04;
    }
    if (Player->IsGameModeCreative())
    {
        Flags |= 0x08;  // Godmode: creative instant break.
    }
 
    cPacketizer Pkt(*this, pktPlayerAbilities);
    Pkt.WriteBEUInt8(Flags);
    Pkt.WriteBEFloat(static_cast<float>(0.05 * Player->GetFlyingMaxSpeed()));
    Pkt.WriteBEFloat(static_cast<float>(0.1 * Player->GetNormalMaxSpeed()));
}
 
 
 
 
 
void cProtocol_1_8_0::SendParticleEffect(const AString & a_ParticleName, Vector3f a_Src, Vector3f a_Offset, float a_ParticleData, int a_ParticleAmount)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktParticleEffect);
    Pkt.WriteBEInt32(GetProtocolParticleID(a_ParticleName));
    Pkt.WriteBool(false);
    Pkt.WriteBEFloat(a_Src.x);
    Pkt.WriteBEFloat(a_Src.y);
    Pkt.WriteBEFloat(a_Src.z);
    Pkt.WriteBEFloat(a_Offset.x);
    Pkt.WriteBEFloat(a_Offset.y);
    Pkt.WriteBEFloat(a_Offset.z);
    Pkt.WriteBEFloat(a_ParticleData);
    Pkt.WriteBEInt32(a_ParticleAmount);
}
 
 
 
 
 
void cProtocol_1_8_0::SendParticleEffect(const AString & a_ParticleName, Vector3f a_Src, Vector3f a_Offset, float a_ParticleData, int a_ParticleAmount, std::array<int, 2> a_Data)
{
    ASSERT(m_State == 3);  // In game mode?
 
    const auto ParticleID = GetProtocolParticleID(a_ParticleName);
 
    cPacketizer Pkt(*this, pktParticleEffect);
    Pkt.WriteBEInt32(ParticleID);
    Pkt.WriteBool(false);
    Pkt.WriteBEFloat(a_Src.x);
    Pkt.WriteBEFloat(a_Src.y);
    Pkt.WriteBEFloat(a_Src.z);
    Pkt.WriteBEFloat(a_Offset.x);
    Pkt.WriteBEFloat(a_Offset.y);
    Pkt.WriteBEFloat(a_Offset.z);
    Pkt.WriteBEFloat(a_ParticleData);
    Pkt.WriteBEInt32(a_ParticleAmount);
 
    switch (ParticleID)
    {
        // iconcrack
        case 36:
        {
            Pkt.WriteVarInt32(static_cast<UInt32>(a_Data[0]));
            Pkt.WriteVarInt32(static_cast<UInt32>(a_Data[1]));
            break;
        }
        // blockcrack
        // blockdust
        case 37:
        case 38:
        {
            Pkt.WriteVarInt32(static_cast<UInt32>(a_Data[0]));
            break;
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListAddPlayer(const cPlayer & a_Player)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerList);
    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.GetEffectiveGameMode()));
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetClientHandle()->GetPing()));
    Pkt.WriteBool(false);
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListHeaderFooter(const cCompositeChat & a_Header, const cCompositeChat & a_Footer)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerListHeaderFooter);
    Pkt.WriteString(a_Header.CreateJsonString(false));
    Pkt.WriteString(a_Footer.CreateJsonString(false));
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListRemovePlayer(const cPlayer & a_Player)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerList);
    Pkt.WriteVarInt32(4);
    Pkt.WriteVarInt32(1);
    Pkt.WriteUUID(a_Player.GetUUID());
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListUpdateDisplayName(const cPlayer & a_Player, const AString & a_CustomName)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerList);
    Pkt.WriteVarInt32(3);
    Pkt.WriteVarInt32(1);
    Pkt.WriteUUID(a_Player.GetUUID());
 
    if (a_CustomName.empty())
    {
        Pkt.WriteBool(false);
    }
    else
    {
        Pkt.WriteBool(true);
        Pkt.WriteString(JsonUtils::SerializeSingleValueJsonObject("text", a_CustomName));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListUpdateGameMode(const cPlayer & a_Player)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerList);
    Pkt.WriteVarInt32(1);
    Pkt.WriteVarInt32(1);
    Pkt.WriteUUID(a_Player.GetUUID());
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetEffectiveGameMode()));
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerListUpdatePing()
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerList);
    Pkt.WriteVarInt32(2);
 
    const auto World = m_Client->GetPlayer()->GetWorld();
    Pkt.WriteVarInt32(static_cast<UInt32>(World->GetPlayerCount()));
    World->ForEachPlayer([&Pkt](cPlayer & a_Player)
    {
        Pkt.WriteUUID(a_Player.GetUUID());
        Pkt.WriteVarInt32(static_cast<UInt32>(a_Player.GetClientHandle()->GetPing()));
        return false;
    });
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerMoveLook (const Vector3d a_Pos, const float a_Yaw, const float a_Pitch, const bool a_IsRelative)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPlayerMoveLook);
    Pkt.WriteBEDouble(a_Pos.x);
    Pkt.WriteBEDouble(a_Pos.y);
    Pkt.WriteBEDouble(a_Pos.z);
    Pkt.WriteBEFloat(a_Yaw);
    Pkt.WriteBEFloat(a_Pitch);
 
    if (a_IsRelative)
    {
        // Set all bits to 1 - makes everything relative
        Pkt.WriteBEUInt8(static_cast<UInt8>(-1));
    }
    else
    {
        // Set all bits to 0 - make everything absolute
        Pkt.WriteBEUInt8(0);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerMoveLook(void)
{
    cPlayer * Player = m_Client->GetPlayer();
    SendPlayerMoveLook(Player->GetPosition(), static_cast<float>(Player->GetYaw()), static_cast<float>(Player->GetPitch()), false);
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerPermissionLevel()
{
    // 1.8 has no concept of a permission level.
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerPosition(void)
{
    // There is no dedicated packet for this, send the whole thing:
    SendPlayerMoveLook();
}
 
 
 
 
 
void cProtocol_1_8_0::SendPlayerSpawn(const cPlayer & a_Player)
{
    // Called to spawn another player for the client
    cPacketizer Pkt(*this, pktSpawnOtherPlayer);
    Pkt.WriteVarInt32(a_Player.GetUniqueID());
    Pkt.WriteUUID(a_Player.GetUUID());
    Vector3d LastSentPos = a_Player.GetLastSentPosition();
    Pkt.WriteFPInt(LastSentPos.x);
    Pkt.WriteFPInt(LastSentPos.y + 0.001);  // The "+ 0.001" is there because otherwise the player falls through the block they were standing on.
    Pkt.WriteFPInt(LastSentPos.z);
    Pkt.WriteByteAngle(a_Player.GetYaw());
    Pkt.WriteByteAngle(a_Player.GetPitch());
    Pkt.WriteBEInt16(a_Player.GetEquippedItem().IsEmpty() ? 0 : a_Player.GetEquippedItem().m_ItemType);
    WriteEntityMetadata(Pkt, a_Player);
    Pkt.WriteBEUInt8(0x7f);  // Metadata: end
}
 
 
 
 
 
void cProtocol_1_8_0::SendPluginMessage(const AString & a_Channel, const ContiguousByteBufferView a_Message)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktPluginMessage);
    Pkt.WriteString(a_Channel);
    Pkt.WriteBuf(a_Message);
}
 
 
 
 
 
void cProtocol_1_8_0::SendRemoveEntityEffect(const cEntity & a_Entity, int a_EffectID)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktRemoveEntityEffect);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_EffectID));
}
 
 
 
 
 
void cProtocol_1_8_0::SendResetTitle(void)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTitle);
    Pkt.WriteVarInt32(4);  // Reset title
}
 
 
 
 
 
void cProtocol_1_8_0::SendResourcePack(const AString & a_ResourcePackUrl)
{
    cPacketizer Pkt(*this, pktResourcePack);
 
    cSha1Checksum Checksum;
    Checksum.Update(reinterpret_cast<const Byte *>(a_ResourcePackUrl.c_str()), a_ResourcePackUrl.size());
    Byte Digest[20];
    Checksum.Finalize(Digest);
    AString Sha1Output;
    cSha1Checksum::DigestToHex(Digest, Sha1Output);
 
    Pkt.WriteString(a_ResourcePackUrl);
    Pkt.WriteString(Sha1Output);
}
 
 
 
 
 
void cProtocol_1_8_0::SendRespawn(eDimension a_Dimension)
{
    cPacketizer Pkt(*this, pktRespawn);
    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_8_0::SendScoreboardObjective(const AString & a_Name, const AString & a_DisplayName, Byte a_Mode)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktScoreboardObjective);
    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_8_0::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, pktUpdateScore);
    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_8_0::SendDisplayObjective(const AString & a_Objective, cScoreboard::eDisplaySlot a_Display)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktDisplayObjective);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Display));
    Pkt.WriteString(a_Objective);
}
 
 
 
 
 
void cProtocol_1_8_0::SendSetSubTitle(const cCompositeChat & a_SubTitle)
{
    SendSetRawSubTitle(a_SubTitle.CreateJsonString(false));
}
 
 
 
 
 
void cProtocol_1_8_0::SendSetRawSubTitle(const AString & a_SubTitle)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTitle);
    Pkt.WriteVarInt32(1);  // Set subtitle
    Pkt.WriteString(a_SubTitle);
}
 
 
 
 
 
void cProtocol_1_8_0::SendSetTitle(const cCompositeChat & a_Title)
{
    SendSetRawTitle(a_Title.CreateJsonString(false));
}
 
 
 
 
 
void cProtocol_1_8_0::SendSetRawTitle(const AString & a_Title)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTitle);
    Pkt.WriteVarInt32(0);  // Set title
    Pkt.WriteString(a_Title);
}
 
 
 
 
 
void cProtocol_1_8_0::SendSoundEffect(const AString & a_SoundName, Vector3d a_Origin, float a_Volume, float a_Pitch)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSoundEffect);
    Pkt.WriteString(a_SoundName);
    Pkt.WriteBEInt32(static_cast<Int32>(a_Origin.x * 8.0));
    Pkt.WriteBEInt32(static_cast<Int32>(a_Origin.y * 8.0));
    Pkt.WriteBEInt32(static_cast<Int32>(a_Origin.z * 8.0));
    Pkt.WriteBEFloat(a_Volume);
    Pkt.WriteBEUInt8(static_cast<Byte>(a_Pitch * 63));
}
 
 
 
 
 
void cProtocol_1_8_0::SendSoundParticleEffect(const EffectID a_EffectID, Vector3i a_Origin, int a_Data)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSoundParticleEffect);
    Pkt.WriteBEInt32(static_cast<int>(a_EffectID));
    Pkt.WriteXYZPosition64(a_Origin);
    Pkt.WriteBEInt32(a_Data);
    Pkt.WriteBool(false);
}
 
 
 
 
 
void cProtocol_1_8_0::SendSpawnEntity(const cEntity & a_Entity)
{
    Int32 EntityData = /* Default: velocity present flag */ 1;
    const auto EntityType = GetProtocolEntityType(a_Entity);
 
    if (a_Entity.IsMinecart())
    {
        const auto & Cart = static_cast<const cMinecart &>(a_Entity);
        EntityData = static_cast<Int32>(Cart.GetPayload());
    }
    else if (a_Entity.IsItemFrame())
    {
        const auto & Frame = static_cast<const cItemFrame &>(a_Entity);
        EntityData = static_cast<Int32>(Frame.GetProtocolFacing());
    }
    else if (a_Entity.IsFallingBlock())
    {
        const auto & Block = static_cast<const cFallingBlock &>(a_Entity);
        EntityData = Block.GetBlockType() | (static_cast<Int32>(Block.GetBlockMeta()) << 12);
    }
    else if (a_Entity.IsFloater())
    {
        const auto & Floater = static_cast<const cFloater &>(a_Entity);
        EntityData = static_cast<Int32>(Floater.GetOwnerID());
    }
    else if (a_Entity.IsProjectile())
    {
        using PType = cProjectileEntity::eKind;
        const auto & Projectile = static_cast<const cProjectileEntity &>(a_Entity);
 
        if (Projectile.GetProjectileKind() == PType::pkArrow)
        {
            const auto & Arrow = static_cast<const cArrowEntity &>(Projectile);
            EntityData = static_cast<Int32>(Arrow.GetCreatorUniqueID() + 1);
        }
    }
 
    SendEntitySpawn(a_Entity, EntityType, EntityData);
}
 
 
 
 
 
void cProtocol_1_8_0::SendSpawnMob(const cMonster & a_Mob)
{
    ASSERT(m_State == 3);  // In game mode?
 
    const auto MobType = GetProtocolMobType(a_Mob.GetMobType());
 
    // If the type is not valid in this protocol bail out:
    if (MobType == 0)
    {
        return;
    }
 
    cPacketizer Pkt(*this, pktSpawnMob);
    Pkt.WriteVarInt32(a_Mob.GetUniqueID());
    Pkt.WriteBEUInt8(static_cast<Byte>(MobType));
    Vector3d LastSentPos = a_Mob.GetLastSentPosition();
    Pkt.WriteFPInt(LastSentPos.x);
    Pkt.WriteFPInt(LastSentPos.y);
    Pkt.WriteFPInt(LastSentPos.z);
    Pkt.WriteByteAngle(a_Mob.GetHeadYaw());  // Doesn't seem to be used
    Pkt.WriteByteAngle(a_Mob.GetPitch());
    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(0x7f);  // Metadata terminator
}
 
 
 
 
 
void cProtocol_1_8_0::SendStatistics(const StatisticsManager & a_Manager)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktStatistics);
 
    // No need to check Size != 0.
    // Assume that the vast majority of the time there's at least one statistic to send:
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Manager.Custom.size()));
 
    for (const auto & [Statistic, Value] : a_Manager.Custom)
    {
        Pkt.WriteString(GetProtocolStatisticName(Statistic));
        Pkt.WriteVarInt32(static_cast<UInt32>(Value));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendTabCompletionResults(const AStringVector & a_Results)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTabCompletionResults);
    Pkt.WriteVarInt32(static_cast<UInt32>(a_Results.size()));
 
    for (AStringVector::const_iterator itr = a_Results.begin(), end = a_Results.end(); itr != end; ++itr)
    {
        Pkt.WriteString(*itr);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendThunderbolt(Vector3i a_Origin)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSpawnGlobalEntity);
    Pkt.WriteVarInt32(0);  // EntityID = 0, always
    Pkt.WriteBEUInt8(1);  // Type = Thunderbolt
    Pkt.WriteFPInt(a_Origin.x);
    Pkt.WriteFPInt(a_Origin.y);
    Pkt.WriteFPInt(a_Origin.z);
}
 
 
 
 
 
void cProtocol_1_8_0::SendTitleTimes(int a_FadeInTicks, int a_DisplayTicks, int a_FadeOutTicks)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTitle);
    Pkt.WriteVarInt32(2);  // Set title display times
    Pkt.WriteBEInt32(a_FadeInTicks);
    Pkt.WriteBEInt32(a_DisplayTicks);
    Pkt.WriteBEInt32(a_FadeOutTicks);
}
 
 
 
 
 
void cProtocol_1_8_0::SendTimeUpdate(const cTickTimeLong a_WorldAge, const cTickTimeLong a_WorldDate, const bool a_DoDaylightCycle)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktTimeUpdate);
    Pkt.WriteBEInt64(a_WorldAge.count());
 
    if (a_DoDaylightCycle)
    {
        Pkt.WriteBEInt64(a_WorldDate.count());
    }
    else
    {
        // Negating the date stops time from advancing on the client
        // (the std::min construction is to handle the case where the date is exactly zero):
        Pkt.WriteBEInt64(std::min(-a_WorldDate.count(), -1LL));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendUnloadChunk(int a_ChunkX, int a_ChunkZ)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktUnloadChunk);
    Pkt.WriteBEInt32(a_ChunkX);
    Pkt.WriteBEInt32(a_ChunkZ);
    Pkt.WriteBool(true);
    Pkt.WriteBEInt16(0);  // Primary bitmap
    Pkt.WriteVarInt32(0);  // Data size
}
 
 
 
 
 
void cProtocol_1_8_0::SendUpdateBlockEntity(cBlockEntity & a_BlockEntity)
{
    ASSERT(m_State == 3);  // In game mode?
 
    Byte Action;
    switch (a_BlockEntity.GetBlockType())
    {
        case E_BLOCK_CHEST:
        case E_BLOCK_ENCHANTMENT_TABLE:
        case E_BLOCK_END_PORTAL:
        case E_BLOCK_TRAPPED_CHEST:
        {
            // The ones with a action of 0 is just a workaround to send the block entities to a client.
            // Todo: 18.09.2020 - remove this when block entities are transmitted in the ChunkData packet - 12xx12
            Action = 0;
            break;
        }
 
        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_WALL_BANNER:
        case E_BLOCK_STANDING_BANNER:   Action = 6;  break;  // Update banner
 
        default: return;  // Block entities change between versions
    }
 
    cPacketizer Pkt(*this, pktUpdateBlockEntity);
    Pkt.WriteXYZPosition64(a_BlockEntity.GetPosX(), a_BlockEntity.GetPosY(), a_BlockEntity.GetPosZ());
    Pkt.WriteBEUInt8(Action);
 
    cFastNBTWriter Writer;
    WriteBlockEntity(Writer, a_BlockEntity);
    Writer.Finish();
    Pkt.WriteBuf(Writer.GetResult());
}
 
 
 
 
 
void cProtocol_1_8_0::SendUpdateSign(Vector3i a_BlockPos, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktUpdateSign);
    Pkt.WriteXYZPosition64(a_BlockPos);
 
    AString Lines[] = { a_Line1, a_Line2, a_Line3, a_Line4 };
    for (size_t i = 0; i < ARRAYCOUNT(Lines); i++)
    {
        Pkt.WriteString(JsonUtils::SerializeSingleValueJsonObject("text", Lines[i]));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendUnlockRecipe(UInt32 a_RecipeID)
{
    // Client doesn't support this feature
    return;
}
 
 
 
 
 
void cProtocol_1_8_0::SendInitRecipes(UInt32 a_RecipeID)
{
    // Client doesn't support this feature
    return;
}
 
 
 
 
 
void cProtocol_1_8_0::SendWeather(eWeather a_Weather)
{
    ASSERT(m_State == 3);  // In game mode?
 
    {
        cPacketizer Pkt(*this, pktWeather);
        Pkt.WriteBEUInt8((a_Weather == wSunny) ? 1 : 2);  // End rain / begin rain
        Pkt.WriteBEFloat(0);  // Unused for weather
    }
 
    // TODO: Fade effect, somehow
}
 
 
 
 
 
void cProtocol_1_8_0::SendWholeInventory(const cWindow & a_Window)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktWindowItems);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Window.GetWindowID()));
    Pkt.WriteBEInt16(static_cast<Int16>(a_Window.GetNumSlots()));
    cItems Slots;
    a_Window.GetSlots(*(m_Client->GetPlayer()), Slots);
    for (cItems::const_iterator itr = Slots.begin(), end = Slots.end(); itr != end; ++itr)
    {
        WriteItem(Pkt, *itr);
    }  // for itr - Slots[]
}
 
 
 
 
 
void cProtocol_1_8_0::SendWindowClose(const cWindow & a_Window)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktWindowClose);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Window.GetWindowID()));
}
 
 
 
 
 
void cProtocol_1_8_0::SendWindowOpen(const cWindow & a_Window)
{
    ASSERT(m_State == 3);  // In game mode?
 
    if (a_Window.GetWindowType() < 0)
    {
        // Do not send this packet for player inventory windows
        return;
    }
 
    cPacketizer Pkt(*this, pktWindowOpen);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Window.GetWindowID()));
    Pkt.WriteString(a_Window.GetWindowTypeName());
    Pkt.WriteString(JsonUtils::SerializeSingleValueJsonObject("text", a_Window.GetWindowTitle()));
 
    switch (a_Window.GetWindowType())
    {
        case cWindow::wtWorkbench:
        case cWindow::wtEnchantment:
        case cWindow::wtAnvil:
        {
            Pkt.WriteBEUInt8(0);
            break;
        }
        default:
        {
            Pkt.WriteBEUInt8(static_cast<UInt8>(a_Window.GetNumNonInventorySlots()));
            break;
        }
    }
 
    if (a_Window.GetWindowType() == cWindow::wtAnimalChest)
    {
        UInt32 HorseID = static_cast<const cHorseWindow &>(a_Window).GetHorseID();
        Pkt.WriteBEInt32(static_cast<Int32>(HorseID));
    }
}
 
 
 
 
 
void cProtocol_1_8_0::SendWindowProperty(const cWindow & a_Window, size_t a_Property, short a_Value)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktWindowProperty);
    Pkt.WriteBEUInt8(static_cast<UInt8>(a_Window.GetWindowID()));
    Pkt.WriteBEInt16(static_cast<Int16>(a_Property));
    Pkt.WriteBEInt16(a_Value);
}
 
 
 
 
 
void cProtocol_1_8_0::CompressPacket(CircularBufferCompressor & a_Packet, ContiguousByteBuffer & a_CompressedData)
{
    const auto Uncompressed = a_Packet.GetView();
 
    if (Uncompressed.size() < CompressionThreshold)
    {
        /* Size doesn't reach threshold, not worth compressing.
 
        --------------- Packet format ----------------
        |--- Header ---------------------------------|
        | PacketSize: Size of all fields below       |
        | DataSize: Zero, means below not compressed |
        |--- Body -----------------------------------|
        | a_Packet: copy of uncompressed data        |
        ----------------------------------------------
        */
        const UInt32 DataSize = 0;
        const auto PacketSize = static_cast<UInt32>(cByteBuffer::GetVarIntSize(DataSize) + Uncompressed.size());
 
        cByteBuffer LengthHeaderBuffer(
            cByteBuffer::GetVarIntSize(PacketSize) +
            cByteBuffer::GetVarIntSize(DataSize)
        );
 
        LengthHeaderBuffer.WriteVarInt32(PacketSize);
        LengthHeaderBuffer.WriteVarInt32(DataSize);
 
        ContiguousByteBuffer LengthData;
        LengthHeaderBuffer.ReadAll(LengthData);
 
        a_CompressedData.reserve(LengthData.size() + Uncompressed.size());
        a_CompressedData = LengthData;
        a_CompressedData += Uncompressed;
 
        return;
    }
 
    /* Definitely worth compressing.
 
    --------------- Packet format ----------------
    |--- Header ---------------------------------|
    | PacketSize: Size of all fields below       |
    | DataSize: Size of uncompressed a_Packet    |
    |--- Body -----------------------------------|
    | CompressedData: compressed a_Packet        |
    ----------------------------------------------
    */
 
    const auto CompressedData = a_Packet.Compress();
    const auto Compressed = CompressedData.GetView();
 
    const UInt32 DataSize = static_cast<UInt32>(Uncompressed.size());
    const auto PacketSize = static_cast<UInt32>(cByteBuffer::GetVarIntSize(DataSize) + Compressed.size());
 
    cByteBuffer LengthHeaderBuffer(
        cByteBuffer::GetVarIntSize(PacketSize) +
        cByteBuffer::GetVarIntSize(DataSize)
    );
 
    LengthHeaderBuffer.WriteVarInt32(PacketSize);
    LengthHeaderBuffer.WriteVarInt32(DataSize);
 
    ContiguousByteBuffer LengthData;
    LengthHeaderBuffer.ReadAll(LengthData);
 
    a_CompressedData.reserve(LengthData.size() + Compressed.size());
    a_CompressedData = LengthData;
    a_CompressedData += Compressed;
}
 
 
 
 
 
eBlockFace cProtocol_1_8_0::FaceIntToBlockFace(const Int32 a_BlockFace)
{
    // Normalize the blockface values returned from the protocol
    // Anything known gets mapped 1:1, everything else returns BLOCK_FACE_NONE
    switch (a_BlockFace)
    {
        case BLOCK_FACE_XM: return BLOCK_FACE_XM;
        case BLOCK_FACE_XP: return BLOCK_FACE_XP;
        case BLOCK_FACE_YM: return BLOCK_FACE_YM;
        case BLOCK_FACE_YP: return BLOCK_FACE_YP;
        case BLOCK_FACE_ZM: return BLOCK_FACE_ZM;
        case BLOCK_FACE_ZP: return BLOCK_FACE_ZP;
        default: return BLOCK_FACE_NONE;
    }
}
 
 
 
 
 
UInt32 cProtocol_1_8_0::GetPacketID(ePacketType a_PacketType) const
{
    switch (a_PacketType)
    {
        case pktAttachEntity:           return 0x1b;
        case pktBlockAction:            return 0x24;
        case pktBlockBreakAnim:         return 0x25;
        case pktBlockChange:            return 0x23;
        case pktBlockChanges:           return 0x22;
        case pktCameraSetTo:            return 0x43;
        case pktChatRaw:                return 0x02;
        case pktCollectEntity:          return 0x0d;
        case pktDestroyEntity:          return 0x13;
        case pktDifficulty:             return 0x41;
        case pktDisconnectDuringGame:   return 0x40;
        case pktDisconnectDuringLogin:  return 0x00;
        case pktDisplayObjective:       return 0x3d;
        case pktEditSign:               return 0x36;
        case pktEncryptionRequest:      return 0x01;
        case pktEntityAnimation:        return 0x0b;
        case pktEntityEffect:           return 0x1d;
        case pktEntityEquipment:        return 0x04;
        case pktEntityHeadLook:         return 0x19;
        case pktEntityLook:             return 0x16;
        case pktEntityMeta:             return 0x1c;
        case pktEntityProperties:       return 0x20;
        case pktEntityRelMove:          return 0x15;
        case pktEntityRelMoveLook:      return 0x17;
        case pktEntityStatus:           return 0x1a;
        case pktEntityVelocity:         return 0x12;
        case pktExperience:             return 0x1f;
        case pktExplosion:              return 0x27;
        case pktGameMode:               return 0x2b;
        case pktHeldItemChange:         return 0x09;
        case pktInventorySlot:          return 0x2f;
        case pktJoinGame:               return 0x01;
        case pktKeepAlive:              return 0x00;
        case pktLeashEntity:            return 0x1b;
        case pktLoginSuccess:           return 0x02;
        case pktMapData:                return 0x34;
        case pktParticleEffect:         return 0x2a;
        case pktPingResponse:           return 0x01;
        case pktPlayerAbilities:        return 0x39;
        case pktPlayerList:             return 0x38;
        case pktPlayerListHeaderFooter: return 0x47;
        case pktPlayerMoveLook:         return 0x08;
        case pktPluginMessage:          return 0x3f;
        case pktRemoveEntityEffect:     return 0x1e;
        case pktResourcePack:           return 0x48;
        case pktRespawn:                return 0x07;
        case pktScoreboardObjective:    return 0x3b;
        case pktSoundEffect:            return 0x29;
        case pktSoundParticleEffect:    return 0x28;
        case pktSpawnExperienceOrb:     return 0x11;
        case pktSpawnGlobalEntity:      return 0x2c;
        case pktSpawnMob:               return 0x0f;
        case pktSpawnObject:            return 0x0e;
        case pktSpawnOtherPlayer:       return 0x0c;
        case pktSpawnPainting:          return 0x10;
        case pktSpawnPosition:          return 0x05;
        case pktStartCompression:       return 0x03;
        case pktStatistics:             return 0x37;
        case pktStatusResponse:         return 0x00;
        case pktTabCompletionResults:   return 0x3a;
        case pktTeleportEntity:         return 0x18;
        case pktTimeUpdate:             return 0x03;
        case pktTitle:                  return 0x45;
        case pktUnloadChunk:            return 0x21;
        case pktUpdateBlockEntity:      return 0x35;
        case pktUpdateHealth:           return 0x06;
        case pktUpdateScore:            return 0x3c;
        case pktUpdateSign:             return 0x33;
        case pktUseBed:                 return 0x0a;
        case pktWeather:                return 0x2b;
        case pktWindowClose:            return 0x2e;
        case pktWindowItems:            return 0x30;
        case pktWindowOpen:             return 0x2d;
        case pktWindowProperty:         return 0x31;
        default:
        {
            LOG("Unhandled outgoing packet type: %s (0x%02x)", cPacketizer::PacketTypeToStr(a_PacketType), a_PacketType);
            ASSERT(!"Unhandled outgoing packet type");
            return 0;
        }
    }
}
 
 
 
 
 
unsigned char cProtocol_1_8_0::GetProtocolEntityAnimation(const EntityAnimation a_Animation) const
{
    switch (a_Animation)
    {
        case EntityAnimation::EntityGetsCriticalHit: return 4;
        case EntityAnimation::EntityGetsMagicalCriticalHit: return 5;
        case EntityAnimation::PlayerLeavesBed: return 2;
        case EntityAnimation::PlayerMainHandSwings: return 0;
        case EntityAnimation::PlayerOffHandSwings: return 0;
        default: return static_cast<unsigned char>(-1);
    }
}
 
 
 
 
 
signed char cProtocol_1_8_0::GetProtocolEntityStatus(const EntityAnimation a_Animation) const
{
    switch (a_Animation)
    {
        case EntityAnimation::AnimalFallsInLove: return 18;
        case EntityAnimation::FireworkRocketExplodes: return 17;
        case EntityAnimation::GuardianAttacks: return 21;
        case EntityAnimation::HorseTamingFails: return 6;
        case EntityAnimation::HorseTamingSucceeds: return 7;
        case EntityAnimation::IronGolemAttacks: return 4;
        case EntityAnimation::IronGolemOffersGift: return 11;
        case EntityAnimation::MinecartSpawnerDelayResets: return 1;
        case EntityAnimation::MinecartTNTIgnites: return 10;
        case EntityAnimation::MobSpawns: return 20;
        case EntityAnimation::OcelotTrusts: return 6;
        case EntityAnimation::OcelotDistrusts: return 7;
        case EntityAnimation::PawnBerryBushPricks: return 2;
        case EntityAnimation::PawnBurns: return 2;
        case EntityAnimation::PawnDies: return 3;
        case EntityAnimation::PawnDrowns: return 2;
        case EntityAnimation::PawnHurts: return 2;
        case EntityAnimation::PawnThornsPricks: return 2;
        case EntityAnimation::PlayerFinishesEating: return 9;
        case EntityAnimation::RabbitJumps: return 1;
        case EntityAnimation::SheepEatsGrass: return 10;
        case EntityAnimation::VillagerKisses: return 12;
        case EntityAnimation::VillagerShowsAnger: return 13;
        case EntityAnimation::VillagerShowsHappiness: return 14;
        case EntityAnimation::WitchMagicks: return 15;
        case EntityAnimation::WolfShakesWater: return 8;
        case EntityAnimation::WolfTamingFails: return 6;
        case EntityAnimation::WolfTamingSucceeds: return 7;
        case EntityAnimation::ZombieVillagerCureFinishes: return 16;
        default: return -1;
    }
}
 
 
 
 
 
UInt32 cProtocol_1_8_0::GetProtocolMobType(const eMonsterType a_MobType) const
{
    switch (a_MobType)
    {
        // Map invalid type to Giant for easy debugging (if this ever spawns, something has gone very wrong)
        case mtInvalidType:           return 53;
        case mtBat:                   return 65;
        case mtBlaze:                 return 61;
        case mtCaveSpider:            return 59;
        case mtChicken:               return 93;
        case mtCow:                   return 92;
        case mtCreeper:               return 50;
        case mtEnderDragon:           return 63;
        case mtEnderman:              return 58;
        case mtEndermite:             return 67;
        case mtGhast:                 return 56;
        case mtGiant:                 return 53;
        case mtGuardian:              return 68;
        case mtHorse:                 return 100;
        case mtIronGolem:             return 99;
        case mtMagmaCube:             return 62;
        case mtMooshroom:             return 96;
        case mtOcelot:                return 98;
        case mtPig:                   return 90;
        case mtRabbit:                return 101;
        case mtSheep:                 return 91;
        case mtSilverfish:            return 60;
        case mtSkeleton:              return 51;
        case mtSlime:                 return 55;
        case mtSnowGolem:             return 97;
        case mtSpider:                return 52;
        case mtSquid:                 return 94;
        case mtVillager:              return 120;
        case mtWitch:                 return 66;
        case mtWither:                return 64;
        case mtWitherSkeleton:        return 51;
        case mtWolf:                  return 95;
        case mtZombie:                return 54;
        case mtZombiePigman:          return 57;
        case mtZombieVillager:        return 27;
 
        // Mobs that get replaced with another because they were added later
        case mtCat:                   return GetProtocolMobType(mtOcelot);
        case mtDonkey:                return GetProtocolMobType(mtHorse);
        case mtMule:                  return GetProtocolMobType(mtHorse);
        case mtSkeletonHorse:         return GetProtocolMobType(mtHorse);
        case mtZombieHorse:           return GetProtocolMobType(mtHorse);
        case mtStray:                 return GetProtocolMobType(mtSkeleton);
        case mtHusk:                  return GetProtocolMobType(mtZombie);
 
        default:                      return 0;
    }
}
 
 
 
 
 
cProtocol::Version cProtocol_1_8_0::GetProtocolVersion() const
{
    return Version::v1_8_0;
}
 
 
 
 
 
bool cProtocol_1_8_0::HandlePacket(cByteBuffer & a_ByteBuffer, UInt32 a_PacketType)
{
    switch (m_State)
    {
        case State::Status:
        {
            switch (a_PacketType)
            {
                case 0x00: HandlePacketStatusRequest(a_ByteBuffer); return true;
                case 0x01: HandlePacketStatusPing   (a_ByteBuffer); return true;
            }
            break;
        }
 
        case State::Login:
        {
            switch (a_PacketType)
            {
                case 0x00: HandlePacketLoginStart             (a_ByteBuffer); return true;
                case 0x01: HandlePacketLoginEncryptionResponse(a_ByteBuffer); return true;
            }
            break;
        }
 
        case State::Game:
        {
            switch (a_PacketType)
            {
                case 0x00: HandlePacketKeepAlive              (a_ByteBuffer); return true;
                case 0x01: HandlePacketChatMessage            (a_ByteBuffer); return true;
                case 0x02: HandlePacketUseEntity              (a_ByteBuffer); return true;
                case 0x03: HandlePacketPlayer                 (a_ByteBuffer); return true;
                case 0x04: HandlePacketPlayerPos              (a_ByteBuffer); return true;
                case 0x05: HandlePacketPlayerLook             (a_ByteBuffer); return true;
                case 0x06: HandlePacketPlayerPosLook          (a_ByteBuffer); return true;
                case 0x07: HandlePacketBlockDig               (a_ByteBuffer); return true;
                case 0x08: HandlePacketBlockPlace             (a_ByteBuffer); return true;
                case 0x09: HandlePacketSlotSelect             (a_ByteBuffer); return true;
                case 0x0a: HandlePacketAnimation              (a_ByteBuffer); return true;
                case 0x0b: HandlePacketEntityAction           (a_ByteBuffer); return true;
                case 0x0c: HandlePacketSteerVehicle           (a_ByteBuffer); return true;
                case 0x0d: HandlePacketWindowClose            (a_ByteBuffer); return true;
                case 0x0e: HandlePacketWindowClick            (a_ByteBuffer); return true;
                case 0x0f:  // Confirm transaction - not used in MCS
                case 0x10: HandlePacketCreativeInventoryAction(a_ByteBuffer); return true;
                case 0x11: HandlePacketEnchantItem            (a_ByteBuffer); return true;
                case 0x12: HandlePacketUpdateSign             (a_ByteBuffer); return true;
                case 0x13: HandlePacketPlayerAbilities        (a_ByteBuffer); return true;
                case 0x14: HandlePacketTabComplete            (a_ByteBuffer); return true;
                case 0x15: HandlePacketClientSettings         (a_ByteBuffer); return true;
                case 0x16: HandlePacketClientStatus           (a_ByteBuffer); return true;
                case 0x17: HandlePacketPluginMessage          (a_ByteBuffer); return true;
                case 0x18: HandlePacketSpectate               (a_ByteBuffer); return true;
                case 0x19: HandlePacketResourcePackStatus     (a_ByteBuffer); return true;
            }
            break;
        }
    }  // switch (m_State)
 
    // Unknown packet type, report to the ClientHandle:
    m_Client->PacketUnknown(a_PacketType);
    return false;
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketStatusPing(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEInt64, Int64, Timestamp);
 
    cPacketizer Pkt(*this, pktPingResponse);
    Pkt.WriteBEInt64(Timestamp);
}
 
 
 
 
 
void cProtocol_1_8_0::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;
    const auto ProtocolVersion = GetProtocolVersion();
    Version["name"] = "Cuberite " + cMultiVersionProtocol::GetVersionTextFromInt(ProtocolVersion);
    Version["protocol"] = static_cast<std::underlying_type_t<cProtocol::Version>>(ProtocolVersion);
 
    // Players:
    Json::Value Players;
    Players["online"] = NumPlayers;
    Players["max"] = MaxPlayers;
    // TODO: Add "sample"
 
    // Description:
    Json::Value Description;
    Description["text"] = std::move(ServerDescription);
 
    // Create the response:
    Json::Value ResponseValue;
    ResponseValue["version"] = Version;
    ResponseValue["players"] = Players;
    ResponseValue["description"] = Description;
    m_Client->ForgeAugmentServerListPing(ResponseValue);
    if (!Favicon.empty())
    {
        ResponseValue["favicon"] = "data:image/png;base64," + Favicon;
    }
 
    // Serialize the response into a packet:
    cPacketizer Pkt(*this, pktStatusResponse);
    Pkt.WriteString(JsonUtils::WriteFastString(ResponseValue));
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketLoginEncryptionResponse(cByteBuffer & a_ByteBuffer)
{
    UInt32 EncKeyLength, EncNonceLength;
    if (!a_ByteBuffer.ReadVarInt(EncKeyLength))
    {
        return;
    }
    ContiguousByteBuffer EncKey;
    if (!a_ByteBuffer.ReadSome(EncKey, EncKeyLength))
    {
        return;
    }
    if (!a_ByteBuffer.ReadVarInt(EncNonceLength))
    {
        return;
    }
    ContiguousByteBuffer EncNonce;
    if (!a_ByteBuffer.ReadSome(EncNonce, EncNonceLength))
    {
        return;
    }
    if ((EncKeyLength > MAX_ENC_LEN) || (EncNonceLength > MAX_ENC_LEN))
    {
        LOGD("Too long encryption");
        m_Client->Kick("Hacked client");
        return;
    }
 
    // Decrypt EncNonce using privkey
    cRsaPrivateKey & rsaDecryptor = cRoot::Get()->GetServer()->GetPrivateKey();
    UInt32 DecryptedNonce[MAX_ENC_LEN / sizeof(Int32)];
    int res = rsaDecryptor.Decrypt(EncNonce, reinterpret_cast<Byte *>(DecryptedNonce), sizeof(DecryptedNonce));
    if (res != 4)
    {
        LOGD("Bad nonce length: got %d, exp %d", res, 4);
        m_Client->Kick("Hacked client");
        return;
    }
    if (ntohl(DecryptedNonce[0]) != static_cast<unsigned>(reinterpret_cast<uintptr_t>(this)))
    {
        LOGD("Bad nonce value");
        m_Client->Kick("Hacked client");
        return;
    }
 
    // Decrypt the symmetric encryption key using privkey:
    Byte DecryptedKey[MAX_ENC_LEN];
    res = rsaDecryptor.Decrypt(EncKey, DecryptedKey, sizeof(DecryptedKey));
    if (res != 16)
    {
        LOGD("Bad key length");
        m_Client->Kick("Hacked client");
        return;
    }
 
    StartEncryption(DecryptedKey);
    m_Client->HandleLogin();
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketLoginStart(cByteBuffer & a_ByteBuffer)
{
    AString Username;
    if (!a_ByteBuffer.ReadVarUTF8String(Username))
    {
        m_Client->Kick("Bad username");
        return;
    }
 
    if (!m_Client->HandleHandshake(Username))
    {
        // The client is not welcome here, they have been sent a Kick packet already
        return;
    }
 
    m_Client->SetUsername(std::move(Username));
 
    // If auth is required, then send the encryption request:
    if (const auto Server = cRoot::Get()->GetServer(); Server->ShouldAuthenticate())
    {
        cPacketizer Pkt(*this, pktEncryptionRequest);
        Pkt.WriteString(Server->GetServerID());
        const auto PubKeyDer = Server->GetPublicKeyDER();
        Pkt.WriteVarInt32(static_cast<UInt32>(PubKeyDer.size()));
        Pkt.WriteBuf(PubKeyDer);
        Pkt.WriteVarInt32(4);
        Pkt.WriteBEInt32(static_cast<int>(reinterpret_cast<intptr_t>(this)));  // Using 'this' as the cryptographic nonce, so that we don't have to generate one each time :)
        return;
    }
 
    m_Client->HandleLogin();
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketAnimation(cByteBuffer & a_ByteBuffer)
{
    m_Client->HandleAnimation(true);  // Packet exists solely for arm-swing notification (main hand).
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketBlockDig(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Status);
 
    Vector3i Position;
    if (!a_ByteBuffer.ReadXYZPosition64(Position))
    {
        return;
    }
 
    HANDLE_READ(a_ByteBuffer, ReadBEInt8, Int8, Face);
 
    m_Client->HandleLeftClick(Position, FaceIntToBlockFace(Face), Status);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketBlockPlace(cByteBuffer & a_ByteBuffer)
{
    Vector3i BlockPos;
    if (!a_ByteBuffer.ReadXYZPosition64(BlockPos))
    {
        return;
    }
 
    HANDLE_READ(a_ByteBuffer, ReadBEInt8, Int8, Face);
 
    cItem Item;  // Ignored
    ReadItem(a_ByteBuffer, Item, 3);
 
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, CursorX);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, CursorY);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, CursorZ);
 
    eBlockFace blockFace = FaceIntToBlockFace(Face);
    if (blockFace == eBlockFace::BLOCK_FACE_NONE)
    {
        m_Client->HandleUseItem(true);
    }
    else
    {
        m_Client->HandleRightClick(BlockPos, blockFace, {CursorX, CursorY, CursorZ}, true);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketChatMessage(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Message);
 
    m_Client->HandleChat(Message);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketClientSettings(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Locale);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,       UInt8,   ViewDistance);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,       UInt8,   ChatFlags);
    HANDLE_READ(a_ByteBuffer, ReadBool,          bool,    ChatColors);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,       UInt8,   SkinParts);
 
    m_Client->SetLocale(Locale);
    m_Client->SetViewDistance(ViewDistance);
    m_Client->GetPlayer()->SetSkinParts(SkinParts);
    // TODO: Handle chat flags and chat colors
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketClientStatus(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, ActionID);
 
    switch (ActionID)
    {
        case 0:
        {
            // Respawn
            m_Client->HandleRespawn();
            break;
        }
        case 1:
        {
            // Request stats
            SendStatistics(m_Client->GetPlayer()->GetStatistics());
            break;
        }
        case 2:
        {
            // Open Inventory achievement
            m_Client->GetPlayer()->AwardAchievement(CustomStatistic::AchOpenInventory);
            break;
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketCreativeInventoryAction(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEInt16, Int16, SlotNum);
 
    cItem Item;
    if (!ReadItem(a_ByteBuffer, Item))
    {
        return;
    }
    m_Client->HandleCreativeInventory(SlotNum, Item, (SlotNum == -1) ? caLeftClickOutside : caLeftClick);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketEntityAction(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarInt,  UInt32, PlayerID);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8,  Action);
    HANDLE_READ(a_ByteBuffer, ReadVarInt,  UInt32, JumpBoost);
 
    if (PlayerID != m_Client->GetPlayer()->GetUniqueID())
    {
        LOGD("Player \"%s\" attempted to action another entity - hacked client?", m_Client->GetUsername().c_str());
        return;
    }
 
    switch (Action)
    {
        case 0: return m_Client->HandleCrouch(true);
        case 1: return m_Client->HandleCrouch(false);
        case 2: return m_Client->HandleLeaveBed();
        case 3: return m_Client->HandleSprint(true);
        case 4: return m_Client->HandleSprint(false);
        case 6: return m_Client->HandleOpenHorseInventory();
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketKeepAlive(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarInt, UInt32, KeepAliveID);
 
    m_Client->HandleKeepAlive(KeepAliveID);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPlayer(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBool, bool, IsOnGround);
    // TODO: m_Client->HandlePlayerOnGround(IsOnGround);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPlayerAbilities(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Flags);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, FlyingSpeed);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, WalkingSpeed);
 
    // COnvert the bitfield into individual boolean flags:
    bool IsFlying = false;
    if ((Flags & 2) != 0)
    {
        IsFlying = true;
    }
 
    m_Client->HandlePlayerAbilities(IsFlying, FlyingSpeed, WalkingSpeed);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPlayerLook(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, Yaw);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, Pitch);
    HANDLE_READ(a_ByteBuffer, ReadBool,    bool,  IsOnGround);
 
    m_Client->HandlePlayerLook(Yaw, Pitch, IsOnGround);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPlayerPos(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosX);
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosY);
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosZ);
    HANDLE_READ(a_ByteBuffer, ReadBool,     bool,   IsOnGround);
 
    m_Client->HandlePlayerMove({PosX, PosY, PosZ}, IsOnGround);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPlayerPosLook(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosX);
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosY);
    HANDLE_READ(a_ByteBuffer, ReadBEDouble, double, PosZ);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat,  float,  Yaw);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat,  float,  Pitch);
    HANDLE_READ(a_ByteBuffer, ReadBool,     bool,   IsOnGround);
 
    m_Client->HandlePlayerMoveLook({PosX, PosY, PosZ}, Yaw, Pitch, IsOnGround);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketPluginMessage(cByteBuffer & a_ByteBuffer)
{
    // https://wiki.vg/index.php?title=Plugin_channels&oldid=14089#MC.7CAdvCmd
 
    HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Channel);
 
    const std::string_view ChannelView = Channel;
 
    // If the plugin channel is recognized vanilla, handle it directly:
    if (ChannelView.substr(0, 3) == "MC|")
    {
        HandleVanillaPluginMessage(a_ByteBuffer, ChannelView.substr(3));
        return;
    }
 
    ContiguousByteBuffer Data;
 
    // Read the plugin message and relay to clienthandle:
    a_ByteBuffer.ReadSome(Data, a_ByteBuffer.GetReadableSpace());
    m_Client->HandlePluginMessage(Channel, Data);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketResourcePackStatus(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Hash);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Status);
 
    m_Client->HandleResourcePack(Status);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketSlotSelect(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEInt16, Int16, SlotNum);
 
    m_Client->HandleSlotSelected(SlotNum);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketSpectate(cByteBuffer &a_ByteBuffer)
{
    cUUID playerUUID;
    if (!a_ByteBuffer.ReadUUID(playerUUID))
    {
        return;
    }
 
    m_Client->HandleSpectate(playerUUID);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketSteerVehicle(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, Sideways);
    HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, Forward);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Flags);
 
    if ((Flags & 0x2) != 0)
    {
        m_Client->HandleUnmount();
    }
    else if ((Flags & 0x1) != 0)
    {
        // jump
    }
    else
    {
        m_Client->HandleSteerVehicle(Forward, Sideways);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketTabComplete(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Text);
    HANDLE_READ(a_ByteBuffer, ReadBool,          bool,    HasPosition);
 
    if (HasPosition)
    {
        HANDLE_READ(a_ByteBuffer, ReadBEInt64, Int64, Position);
    }
 
    m_Client->HandleTabCompletion(Text);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketUpdateSign(cByteBuffer & a_ByteBuffer)
{
    Vector3i Position;
    if (!a_ByteBuffer.ReadXYZPosition64(Position))
    {
        return;
    }
 
    AString Lines[4];
    Json::Value root;
    for (int i = 0; i < 4; i++)
    {
        HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Line);
 
        if (JsonUtils::ParseString(Line, root) && root.isString())
        {
            Lines[i] = root.asString();
        }
    }
 
    m_Client->HandleUpdateSign(Position, Lines[0], Lines[1], Lines[2], Lines[3]);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketUseEntity(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadVarInt, UInt32, EntityID);
    HANDLE_READ(a_ByteBuffer, ReadVarInt, UInt32, Type);
 
    switch (Type)
    {
        case 0:
        {
            m_Client->HandleUseEntity(EntityID, false);
            break;
        }
        case 1:
        {
            m_Client->HandleUseEntity(EntityID, true);
            break;
        }
        case 2:
        {
            HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, TargetX);
            HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, TargetY);
            HANDLE_READ(a_ByteBuffer, ReadBEFloat, float, TargetZ);
 
            // TODO: Do anything
            break;
        }
        default:
        {
            ASSERT(!"Unhandled use entity type!");
            return;
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketEnchantItem(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, WindowID);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Enchantment);
 
    m_Client->HandleEnchantItem(WindowID, Enchantment);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketWindowClick(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,  UInt8,  WindowID);
    HANDLE_READ(a_ByteBuffer, ReadBEInt16,  Int16,  SlotNum);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,  UInt8,  Button);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt16, UInt16, TransactionID);
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8,  UInt8,  Mode);
 
    cItem Item;
    ReadItem(a_ByteBuffer, Item);
 
    static const Int16 SLOT_NUM_OUTSIDE = -999;
 
    // Convert Button, Mode, SlotNum and HeldItem into eClickAction:
    eClickAction Action;
    switch ((Mode << 8) | Button)
    {
        case 0x0000: Action = (SlotNum != SLOT_NUM_OUTSIDE) ? caLeftClick  : caLeftClickOutside;  break;
        case 0x0001: Action = (SlotNum != SLOT_NUM_OUTSIDE) ? caRightClick : caRightClickOutside; break;
        case 0x0100: Action = caShiftLeftClick;  break;
        case 0x0101: Action = caShiftRightClick; break;
        case 0x0200: Action = caNumber1;         break;
        case 0x0201: Action = caNumber2;         break;
        case 0x0202: Action = caNumber3;         break;
        case 0x0203: Action = caNumber4;         break;
        case 0x0204: Action = caNumber5;         break;
        case 0x0205: Action = caNumber6;         break;
        case 0x0206: Action = caNumber7;         break;
        case 0x0207: Action = caNumber8;         break;
        case 0x0208: Action = caNumber9;         break;
        case 0x0302: Action = caMiddleClick;     break;
        case 0x0400: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caLeftClickOutsideHoldNothing  : caDropKey;     break;
        case 0x0401: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caRightClickOutsideHoldNothing : caCtrlDropKey; break;
        case 0x0500: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caLeftPaintBegin               : caUnknown;     break;
        case 0x0501: Action = (SlotNum != SLOT_NUM_OUTSIDE) ? caLeftPaintProgress            : caUnknown;     break;
        case 0x0502: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caLeftPaintEnd                 : caUnknown;     break;
        case 0x0504: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caRightPaintBegin              : caUnknown;     break;
        case 0x0505: Action = (SlotNum != SLOT_NUM_OUTSIDE) ? caRightPaintProgress           : caUnknown;     break;
        case 0x0506: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caRightPaintEnd                : caUnknown;     break;
        case 0x0508: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caMiddlePaintBegin             : caUnknown;     break;
        case 0x0509: Action = (SlotNum != SLOT_NUM_OUTSIDE) ? caMiddlePaintProgress          : caUnknown;     break;
        case 0x050a: Action = (SlotNum == SLOT_NUM_OUTSIDE) ? caMiddlePaintEnd               : caUnknown;     break;
        case 0x0600: Action = caDblClick; break;
        default:
        {
            LOGWARNING("Unhandled window click mode / button combination: %d (0x%x)", (Mode << 8) | Button, (Mode << 8) | Button);
            Action = caUnknown;
            break;
        }
    }
 
    m_Client->HandleWindowClick(WindowID, SlotNum, Action, Item);
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacketWindowClose(cByteBuffer & a_ByteBuffer)
{
    HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, WindowID);
 
    m_Client->HandleWindowClose(WindowID);
}
 
 
 
 
 
void cProtocol_1_8_0::HandleVanillaPluginMessage(cByteBuffer & a_ByteBuffer, const std::string_view a_Channel)
{
    if ((a_Channel == "AdvCdm") || (a_Channel == "AdvCmd"))  // Spelling was fixed in 15w34.
    {
        HANDLE_READ(a_ByteBuffer, ReadBEUInt8, UInt8, Type);
 
        switch (Type)
        {
            case 0x00:
            {
                HANDLE_READ(a_ByteBuffer, ReadBEInt32, Int32, BlockX);
                HANDLE_READ(a_ByteBuffer, ReadBEInt32, Int32, BlockY);
                HANDLE_READ(a_ByteBuffer, ReadBEInt32, Int32, BlockZ);
                HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Command);
                HANDLE_READ(a_ByteBuffer, ReadBool, bool, TrackOutput);
 
                // Editing a command-block:
                m_Client->HandleCommandBlockBlockChange({BlockX, BlockY, BlockZ}, Command);
                return;
            }
            case 0x01:
            {
                HANDLE_READ(a_ByteBuffer, ReadBEUInt32, UInt32, EntityID);
                HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Command);
                HANDLE_READ(a_ByteBuffer, ReadBool, bool, TrackOutput);
 
                // Editing a command-block-minecart:
                m_Client->HandleCommandBlockEntityChange(EntityID, Command);
                return;
            }
            default:
            {
                LOGD("Player \"%s\" sent an invalid command block edit type - hacked client?", m_Client->GetUsername().c_str());
                return;
            }
        }
    }
    else if (a_Channel == "Beacon")
    {
        HANDLE_READ(a_ByteBuffer, ReadBEUInt32, UInt32, Effect1);
        HANDLE_READ(a_ByteBuffer, ReadBEUInt32, UInt32, Effect2);
 
        m_Client->HandleBeaconSelection(Effect1, Effect2);
    }
    else if (a_Channel == "BEdit")
    {
        if (cItem UnsignedBook; ReadItem(a_ByteBuffer, UnsignedBook))
        {
            // TODO: m_Client->HandleBookEdit
        }
    }
    else if (a_Channel == "BSign")
    {
        if (cItem WrittenBook; ReadItem(a_ByteBuffer, WrittenBook))
        {
            // TODO: m_Client->HandleBookSign
        }
    }
    else if (a_Channel == "Brand")
    {
        HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, Brand);
 
        m_Client->SetClientBrand(Brand);
        m_Client->SendPluginMessage("MC|Brand", "\x08""Cuberite");  // Send back our brand, including the length.
    }
    else if (a_Channel == "ItemName")
    {
        HANDLE_READ(a_ByteBuffer, ReadVarUTF8String, AString, ItemName);
 
        m_Client->HandleAnvilItemName(ItemName);
    }
    else if (a_Channel == "TrSel")
    {
        HANDLE_READ(a_ByteBuffer, ReadBEInt32, Int32, SlotNum);
 
        m_Client->HandleNPCTrade(SlotNum);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::ParseItemMetadata(cItem & a_Item, const ContiguousByteBufferView a_Metadata) const
{
    // Parse into NBT:
    cParsedNBT NBT(a_Metadata);
    if (!NBT.IsValid())
    {
        AString HexDump;
        CreateHexDump(HexDump, a_Metadata.data(), std::max<size_t>(a_Metadata.size(), 1024), 16);
        LOGWARNING("Cannot parse NBT item metadata: %s at (%zu / %zu bytes)\n%s",
            NBT.GetErrorCode().message().c_str(), NBT.GetErrorPos(), a_Metadata.size(), HexDump.c_str()
        );
        return;
    }
 
    // Load enchantments and custom display names from the NBT data:
    for (int tag = NBT.GetFirstChild(NBT.GetRoot()); tag >= 0; tag = NBT.GetNextSibling(tag))
    {
        AString TagName = NBT.GetName(tag);
        switch (NBT.GetType(tag))
        {
            case TAG_List:
            {
                if ((TagName == "ench") || (TagName == "StoredEnchantments"))  // Enchantments tags
                {
                    EnchantmentSerializer::ParseFromNBT(a_Item.m_Enchantments, NBT, tag);
                }
                break;
            }
            case TAG_Compound:
            {
                if (TagName == "display")  // Custom name and lore tag
                {
                    for (int displaytag = NBT.GetFirstChild(tag); displaytag >= 0; displaytag = NBT.GetNextSibling(displaytag))
                    {
                        if ((NBT.GetType(displaytag) == TAG_String) && (NBT.GetName(displaytag) == "Name"))  // Custon name tag
                        {
                            a_Item.m_CustomName = NBT.GetString(displaytag);
                        }
                        else if ((NBT.GetType(displaytag) == TAG_List) && (NBT.GetName(displaytag) == "Lore"))  // Lore tag
                        {
                            for (int loretag = NBT.GetFirstChild(displaytag); loretag >= 0; loretag = NBT.GetNextSibling(loretag))  // Loop through array of strings
                            {
                                a_Item.m_LoreTable.push_back(NBT.GetString(loretag));
                            }
                        }
                        else if ((NBT.GetType(displaytag) == TAG_Int) && (NBT.GetName(displaytag) == "color"))
                        {
                            a_Item.m_ItemColor.m_Color = static_cast<unsigned int>(NBT.GetInt(displaytag));
                        }
                    }
                }
                else if ((TagName == "Fireworks") || (TagName == "Explosion"))
                {
                    cFireworkItem::ParseFromNBT(a_Item.m_FireworkItem, NBT, tag, static_cast<ENUM_ITEM_TYPE>(a_Item.m_ItemType));
                }
                break;
            }
            case TAG_Int:
            {
                if (TagName == "RepairCost")
                {
                    a_Item.m_RepairCost = NBT.GetInt(tag);
                }
                break;
            }
            default: LOGD("Unimplemented NBT data when parsing!"); break;
        }
    }
}
 
 
 
 
 
bool cProtocol_1_8_0::ReadItem(cByteBuffer & a_ByteBuffer, cItem & a_Item, size_t a_KeepRemainingBytes) const
{
    HANDLE_PACKET_READ(a_ByteBuffer, ReadBEInt16, Int16, ItemType);
 
    if (ItemType == -1)
    {
        // The item is empty, no more data follows
        a_Item.Empty();
        return true;
    }
    a_Item.m_ItemType = ItemType;
 
    HANDLE_PACKET_READ(a_ByteBuffer, ReadBEInt8,  Int8,  ItemCount);
    HANDLE_PACKET_READ(a_ByteBuffer, ReadBEInt16, Int16, ItemDamage);
 
    a_Item.m_ItemCount  = ItemCount;
    a_Item.m_ItemDamage = ItemDamage;
    if (ItemCount <= 0)
    {
        a_Item.Empty();
    }
 
    ContiguousByteBuffer Metadata;
    if (!a_ByteBuffer.ReadSome(Metadata, a_ByteBuffer.GetReadableSpace() - a_KeepRemainingBytes) || Metadata.empty() || (Metadata[0] == std::byte(0)))
    {
        // No metadata
        return true;
    }
 
    ParseItemMetadata(a_Item, Metadata);
    return true;
}
 
 
 
 
 
void cProtocol_1_8_0::SendEntitySpawn(const cEntity & a_Entity, const UInt8 a_ObjectType, const Int32 a_ObjectData)
{
    ASSERT(m_State == 3);  // In game mode?
 
    cPacketizer Pkt(*this, pktSpawnObject);
    Pkt.WriteVarInt32(a_Entity.GetUniqueID());
    Pkt.WriteBEUInt8(a_ObjectType);
    Pkt.WriteFPInt(a_Entity.GetPosX());
    Pkt.WriteFPInt(a_Entity.GetPosY());
    Pkt.WriteFPInt(a_Entity.GetPosZ());
    Pkt.WriteByteAngle(a_Entity.GetPitch());
    Pkt.WriteByteAngle(a_Entity.GetYaw());
    Pkt.WriteBEInt32(a_ObjectData);
 
    if (a_ObjectData != 0)
    {
        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_8_0::SendPacket(cPacketizer & a_Pkt)
{
    ASSERT(m_OutPacketBuffer.GetReadableSpace() == m_OutPacketBuffer.GetUsedSpace());
 
    m_Compressor.ReadFrom(m_OutPacketBuffer);
    m_OutPacketBuffer.CommitRead();
 
    const auto PacketData = m_Compressor.GetView();
 
    if (m_State == 3)
    {
        ContiguousByteBuffer CompressedPacket;
 
        // Compress the packet payload:
        cProtocol_1_8_0::CompressPacket(m_Compressor, CompressedPacket);
 
        // Send the packet's payload compressed:
        m_Client->SendData(CompressedPacket);
    }
    else
    {
        // Compression doesn't apply to this state, send raw data:
        m_OutPacketLenBuffer.WriteVarInt32(static_cast<UInt32>(PacketData.size()));
        ContiguousByteBuffer LengthData;
        m_OutPacketLenBuffer.ReadAll(LengthData);
        m_OutPacketLenBuffer.CommitRead();
        m_Client->SendData(LengthData);
 
        // Send the packet's payload directly:
        m_Client->SendData(PacketData);
    }
 
    // Log the comm into logfile:
    if (g_ShouldLogCommOut && m_CommLogFile.IsOpen())
    {
        AString Hex;
        ASSERT(PacketData.size() > 0);
        CreateHexDump(Hex, PacketData.data(), PacketData.size(), 16);
        m_CommLogFile.Write(fmt::format(
            FMT_STRING("Outgoing packet: type {} (translated to 0x{:02x}), length {} (0x{:04x}), state {}. Payload (incl. type):\n{}\n"),
            cPacketizer::PacketTypeToStr(a_Pkt.GetPacketType()), GetPacketID(a_Pkt.GetPacketType()),
            PacketData.size(), PacketData.size(), m_State, Hex
        ));
        /*
        // Useful for debugging a new protocol:
        LOGD("Outgoing packet: type %s (translated to 0x%02x), length %u (0x%04x), state %d. Payload (incl. type):\n%s\n",
            cPacketizer::PacketTypeToStr(a_Pkt.GetPacketType()), GetPacketID(a_Pkt.GetPacketType()),
            PacketLen, PacketLen, m_State, Hex
        );
        //*/
    }
    /*
    // Useful for debugging a new protocol:
    std::this_thread::sleep_for(std::chrono::milliseconds(100));
    */
}
 
 
 
 
 
void cProtocol_1_8_0::WriteBlockEntity(cFastNBTWriter & a_Writer, const cBlockEntity & a_BlockEntity) const
{
    switch (a_BlockEntity.GetBlockType())
    {
        case E_BLOCK_WALL_BANNER:
        case E_BLOCK_STANDING_BANNER:
        {
            auto & BannerEntity = static_cast<const cBannerEntity &>(a_BlockEntity);
            a_Writer.AddInt("Base", static_cast<Int32>(BannerEntity.GetBaseColor()));
            break;
        }
        case E_BLOCK_BEACON:
        case E_BLOCK_CHEST:
        {
            // Nothing!
            break;
        }
        case E_BLOCK_COMMAND_BLOCK:
        {
            auto & CommandBlockEntity = static_cast<const cCommandBlockEntity &>(a_BlockEntity);
            a_Writer.AddByte("TrackOutput", 1);  // Neither I nor the MC wiki has any idea about this
            a_Writer.AddInt("SuccessCount", CommandBlockEntity.GetResult());
            a_Writer.AddString("Command", CommandBlockEntity.GetCommand());
            // You can set custom names for windows in Vanilla
            // For a command block, this would be the 'name' prepended to anything it outputs into global chat
            // MCS doesn't have this, so just leave it @ '@'. (geddit?)
            a_Writer.AddString("CustomName", "@");
            if (!CommandBlockEntity.GetLastOutput().empty())
            {
                a_Writer.AddString("LastOutput", JsonUtils::SerializeSingleValueJsonObject("text", CommandBlockEntity.GetLastOutput()));
            }
            break;
        }
        case E_BLOCK_ENCHANTMENT_TABLE:
        case E_BLOCK_END_PORTAL:
        {
            // Nothing!
            break;
        }
        case E_BLOCK_HEAD:
        {
            auto & MobHeadEntity = static_cast<const cMobHeadEntity &>(a_BlockEntity);
            a_Writer.AddByte("SkullType", MobHeadEntity.GetType() & 0xFF);
            a_Writer.AddByte("Rot", MobHeadEntity.GetRotation() & 0xFF);
 
            // The new Block Entity format for a Mob Head. See: https://minecraft.wiki/w/Head#Block_entity
            a_Writer.BeginCompound("Owner");
                a_Writer.AddString("Id", MobHeadEntity.GetOwnerUUID().ToShortString());
                a_Writer.AddString("Name", MobHeadEntity.GetOwnerName());
                a_Writer.BeginCompound("Properties");
                    a_Writer.BeginList("textures", TAG_Compound);
                        a_Writer.BeginCompound("");
                            a_Writer.AddString("Signature", MobHeadEntity.GetOwnerTextureSignature());
                            a_Writer.AddString("Value", MobHeadEntity.GetOwnerTexture());
                        a_Writer.EndCompound();
                    a_Writer.EndList();
                a_Writer.EndCompound();
            a_Writer.EndCompound();
            break;
        }
        case E_BLOCK_FLOWER_POT:
        {
            auto & FlowerPotEntity = static_cast<const cFlowerPotEntity &>(a_BlockEntity);
            a_Writer.AddInt("Item", static_cast<Int32>(FlowerPotEntity.GetItem().m_ItemType));
            a_Writer.AddInt("Data", static_cast<Int32>(FlowerPotEntity.GetItem().m_ItemDamage));
            break;
        }
        case E_BLOCK_MOB_SPAWNER:
        {
            auto & MobSpawnerEntity = static_cast<const cMobSpawnerEntity &>(a_BlockEntity);
            a_Writer.AddString("EntityId", cMonster::MobTypeToVanillaName(MobSpawnerEntity.GetEntity()));
            a_Writer.AddShort("Delay", MobSpawnerEntity.GetSpawnDelay());
            break;
        }
        default:
        {
            return;
        }
    }
 
    a_Writer.AddInt("x", a_BlockEntity.GetPosX());
    a_Writer.AddInt("y", a_BlockEntity.GetPosY());
    a_Writer.AddInt("z", a_BlockEntity.GetPosZ());
}
 
 
 
 
 
void cProtocol_1_8_0::WriteEntityMetadata(cPacketizer & a_Pkt, const cEntity & a_Entity) const
{
    // Common metadata:
    Byte Flags = 0;
    if (a_Entity.IsOnFire())
    {
        Flags |= 0x01;
    }
    if (a_Entity.IsCrouched())
    {
        Flags |= 0x02;
    }
    if (a_Entity.IsSprinting())
    {
        Flags |= 0x08;
    }
    if (a_Entity.IsRclking())
    {
        Flags |= 0x10;
    }
    if (a_Entity.IsInvisible())
    {
        Flags |= 0x20;
    }
    if (a_Entity.IsElytraFlying())
    {
        Flags |= 0x80;
    }
    a_Pkt.WriteBEUInt8(0);  // Byte(0) + index 0
    a_Pkt.WriteBEUInt8(Flags);
 
    switch (a_Entity.GetEntityType())
    {
        case cEntity::etPlayer:
        {
            auto & Player = static_cast<const cPlayer &>(a_Entity);
 
            // Player name:
            a_Pkt.WriteBEUInt8(0x82);
            a_Pkt.WriteString(Player.GetName());
 
            // Player health:
            a_Pkt.WriteBEUInt8(0x66);
            a_Pkt.WriteBEFloat(static_cast<float>(Player.GetHealth()));
 
            // Skin flags:
            a_Pkt.WriteBEUInt8(0x0A);
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(Player.GetSkinParts()));
 
            break;
        }
        case cEntity::etPickup:
        {
            a_Pkt.WriteBEUInt8((5 << 5) | 10);  // Slot(5) + index 10
            WriteItem(a_Pkt, static_cast<const cPickup &>(a_Entity).GetItem());
            break;
        }
        case cEntity::etMinecart:
        {
            a_Pkt.WriteBEUInt8(0x51);
 
            // The following expression makes Minecarts shake more with less health or higher damage taken
            // It gets half the maximum health, and takes it away from the current health minus the half health:
            /*
            Health: 5 | 3 - (5 - 3) = 1 (shake power)
            Health: 3 | 3 - (3 - 3) = 3
            Health: 1 | 3 - (1 - 3) = 5
            */
            auto & Minecart = static_cast<const cMinecart &>(a_Entity);
            a_Pkt.WriteBEInt32(static_cast<Int32>((((a_Entity.GetMaxHealth() / 2) - (a_Entity.GetHealth() - (a_Entity.GetMaxHealth() / 2))) * Minecart.LastDamage()) * 4));
            a_Pkt.WriteBEUInt8(0x52);
            a_Pkt.WriteBEInt32(1);  // Shaking direction, doesn't seem to affect anything
            a_Pkt.WriteBEUInt8(0x73);
            a_Pkt.WriteBEFloat(static_cast<float>(Minecart.LastDamage() + 10));  // Damage taken / shake effect multiplyer
 
            if (Minecart.GetPayload() == cMinecart::mpNone)
            {
                auto & RideableMinecart = static_cast<const cRideableMinecart &>(Minecart);
                const cItem & MinecartContent = RideableMinecart.GetContent();
                if (!MinecartContent.IsEmpty())
                {
                    a_Pkt.WriteBEUInt8(0x54);
                    int Content = MinecartContent.m_ItemType;
                    Content |= MinecartContent.m_ItemDamage << 8;
                    a_Pkt.WriteBEInt32(Content);
                    a_Pkt.WriteBEUInt8(0x55);
                    a_Pkt.WriteBEInt32(RideableMinecart.GetBlockHeight());
                    a_Pkt.WriteBEUInt8(0x56);
                    a_Pkt.WriteBEUInt8(1);
                }
            }
            else if (Minecart.GetPayload() == cMinecart::mpFurnace)
            {
                a_Pkt.WriteBEUInt8(0x10);
                a_Pkt.WriteBEUInt8(static_cast<const cMinecartWithFurnace &>(Minecart).IsFueled() ? 1 : 0);
            }
            break;
        }  // case etMinecart
 
        case cEntity::etProjectile:
        {
            auto & Projectile = static_cast<const cProjectileEntity &>(a_Entity);
            switch (Projectile.GetProjectileKind())
            {
                case cProjectileEntity::pkArrow:
                {
                    a_Pkt.WriteBEUInt8(0x10);
                    a_Pkt.WriteBEUInt8(static_cast<const cArrowEntity &>(Projectile).IsCritical() ? 1 : 0);
                    break;
                }
                case cProjectileEntity::pkFirework:
                {
                    a_Pkt.WriteBEUInt8(0xa8);
                    WriteItem(a_Pkt, static_cast<const cFireworkEntity &>(Projectile).GetItem());
                    break;
                }
                default:
                {
                    break;
                }
            }
            break;
        }  // case etProjectile
 
        case cEntity::etMonster:
        {
            WriteMobMetadata(a_Pkt, static_cast<const cMonster &>(a_Entity));
            break;
        }
 
        case cEntity::etItemFrame:
        {
            auto & Frame = static_cast<const cItemFrame &>(a_Entity);
            a_Pkt.WriteBEUInt8(0xa8);
            WriteItem(a_Pkt, Frame.GetItem());
            a_Pkt.WriteBEUInt8(0x09);
            a_Pkt.WriteBEUInt8(Frame.GetItemRotation());
            break;
        }  // case etItemFrame
 
        default:
        {
            break;
        }
    }
}
 
 
 
 
 
void cProtocol_1_8_0::WriteEntityProperties(cPacketizer & a_Pkt, const cEntity & a_Entity) const
{
    if (a_Entity.IsPlayer())
    {
        const auto & Player = static_cast<const cPlayer &>(a_Entity);
 
        a_Pkt.WriteBEInt32(1);  // Count.
        a_Pkt.WriteString("generic.movementSpeed");
        a_Pkt.WriteBEDouble(0.1 * Player.GetNormalMaxSpeed());  // The default game speed is 0.1, multiply that value by the relative speed.
 
        // It seems the modifiers aren't conditionally activated; their effects are applied immediately!
        // We have to keep on re-sending this packet when the client notifies us of sprint start and end, and so on. Strange.
 
        if (Player.IsSprinting())
        {
            a_Pkt.WriteVarInt32(1);  // Modifier count.
            a_Pkt.WriteBEUInt64(0x662a6b8dda3e4c1c);
            a_Pkt.WriteBEUInt64(0x881396ea6097278d);  // UUID of the modifier (sprinting speed boost).
            a_Pkt.WriteBEDouble(Player.GetSprintingMaxSpeed() - Player.GetNormalMaxSpeed());
            a_Pkt.WriteBEUInt8(2);
        }
        else
        {
            a_Pkt.WriteVarInt32(0);
        }
    }
    else
    {
        // const cMonster & Mob = (const cMonster &)a_Entity;
 
        // TODO: Send properties and modifiers based on the mob type
 
        a_Pkt.WriteBEInt32(0);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::WriteItem(cPacketizer & a_Pkt, const cItem & a_Item) const
{
    short ItemType = a_Item.m_ItemType;
    ASSERT(ItemType >= -1);  // Check validity of packets in debug runtime
    if (ItemType <= 0)
    {
        // Fix, to make sure no invalid values are sent.
        ItemType = -1;
    }
 
    if (a_Item.IsEmpty())
    {
        a_Pkt.WriteBEInt16(-1);
        return;
    }
 
    a_Pkt.WriteBEInt16(ItemType);
    a_Pkt.WriteBEInt8(a_Item.m_ItemCount);
    a_Pkt.WriteBEInt16(a_Item.m_ItemDamage);
 
    if (a_Item.m_Enchantments.IsEmpty() && a_Item.IsBothNameAndLoreEmpty() && (a_Item.m_ItemType != E_ITEM_FIREWORK_ROCKET) && (a_Item.m_ItemType != E_ITEM_FIREWORK_STAR) && !a_Item.m_ItemColor.IsValid())
    {
        a_Pkt.WriteBEInt8(0);
        return;
    }
 
 
    // Send the enchantments and custom names:
    cFastNBTWriter Writer;
    if (a_Item.m_RepairCost != 0)
    {
        Writer.AddInt("RepairCost", a_Item.m_RepairCost);
    }
    if (!a_Item.m_Enchantments.IsEmpty())
    {
        const char * TagName = (a_Item.m_ItemType == E_ITEM_BOOK) ? "StoredEnchantments" : "ench";
        EnchantmentSerializer::WriteToNBTCompound(a_Item.m_Enchantments, Writer, TagName);
    }
    if (!a_Item.IsBothNameAndLoreEmpty() || a_Item.m_ItemColor.IsValid())
    {
        Writer.BeginCompound("display");
        if (a_Item.m_ItemColor.IsValid())
        {
            Writer.AddInt("color", static_cast<Int32>(a_Item.m_ItemColor.m_Color));
        }
 
        if (!a_Item.IsCustomNameEmpty())
        {
            Writer.AddString("Name", a_Item.m_CustomName);
        }
        if (!a_Item.IsLoreEmpty())
        {
            Writer.BeginList("Lore", TAG_String);
 
            for (const auto & Line : a_Item.m_LoreTable)
            {
                Writer.AddString("", Line);
            }
 
            Writer.EndList();
        }
        Writer.EndCompound();
    }
    if ((a_Item.m_ItemType == E_ITEM_FIREWORK_ROCKET) || (a_Item.m_ItemType == E_ITEM_FIREWORK_STAR))
    {
        cFireworkItem::WriteToNBTCompound(a_Item.m_FireworkItem, Writer, static_cast<ENUM_ITEM_TYPE>(a_Item.m_ItemType));
    }
    Writer.Finish();
 
    const auto Result = Writer.GetResult();
    if (Result.empty())
    {
        a_Pkt.WriteBEInt8(0);
        return;
    }
    a_Pkt.WriteBuf(Result);
}
 
 
 
 
 
void cProtocol_1_8_0::WriteMobMetadata(cPacketizer & a_Pkt, const cMonster & a_Mob) const
{
    // Living Enitiy Metadata
    if (a_Mob.HasCustomName())
    {
        a_Pkt.WriteBEUInt8(0x82);
        a_Pkt.WriteString(a_Mob.GetCustomName());
 
        a_Pkt.WriteBEUInt8(0x03);
        a_Pkt.WriteBool(a_Mob.IsCustomNameAlwaysVisible());
    }
 
    a_Pkt.WriteBEUInt8(0x66);
    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(0x10);
            a_Pkt.WriteBEUInt8(Bat.IsHanging() ? 1 : 0);
            break;
        }  // case mtBat
 
        case mtChicken:
        {
            auto & Chicken = static_cast<const cChicken &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Chicken.IsBaby() ? -1 : (Chicken.IsInLoveCooldown() ? 1 : 0));
            break;
        }  // case mtChicken
 
        case mtCow:
        {
            auto & Cow = static_cast<const cCow &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Cow.IsBaby() ? -1 : (Cow.IsInLoveCooldown() ? 1 : 0));
            break;
        }  // case mtCow
 
        case mtCreeper:
        {
            auto & Creeper = static_cast<const cCreeper &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(Creeper.IsBlowing() ? 1 : 255);
            a_Pkt.WriteBEUInt8(0x11);
            a_Pkt.WriteBEUInt8(Creeper.IsCharged() ? 1 : 0);
            break;
        }  // case mtCreeper
 
        case mtEnderman:
        {
            auto & Enderman = static_cast<const cEnderman &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x30);
            a_Pkt.WriteBEInt16(static_cast<Byte>(Enderman.GetCarriedBlock()));
            a_Pkt.WriteBEUInt8(0x11);
            a_Pkt.WriteBEUInt8(static_cast<Byte>(Enderman.GetCarriedMeta()));
            a_Pkt.WriteBEUInt8(0x12);
            a_Pkt.WriteBEUInt8(Enderman.IsScreaming() ? 1 : 0);
            break;
        }  // case mtEnderman
 
        case mtGhast:
        {
            auto & Ghast = static_cast<const cGhast &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(Ghast.IsCharging());
            break;
        }  // case mtGhast
 
        case mtHorse:
        {
            auto & Horse = static_cast<const cHorse &>(a_Mob);
            int 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(0x50);  // Int at index 16
            a_Pkt.WriteBEInt32(Flags);
            a_Pkt.WriteBEUInt8(0x13);  // Byte at index 19
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(Horse.GetHorseType()));
            a_Pkt.WriteBEUInt8(0x54);  // Int at index 20
            int Appearance = 0;
            Appearance = Horse.GetHorseColor();
            Appearance |= Horse.GetHorseStyle() << 8;
            a_Pkt.WriteBEInt32(Appearance);
            a_Pkt.WriteBEUInt8(0x56);  // Int at index 22
            a_Pkt.WriteBEInt32(Horse.GetHorseArmour());
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Horse.IsBaby() ? -1 : (Horse.IsInLoveCooldown() ? 1 : 0));
            break;
        }  // case mtHorse
 
        case mtMagmaCube:
        {
            auto & MagmaCube = static_cast<const cMagmaCube &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(MagmaCube.GetSize()));
            break;
        }  // case mtMagmaCube
 
        case mtOcelot:
        {
            auto & Ocelot = static_cast<const cOcelot &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Ocelot.IsBaby() ? -1 : (Ocelot.IsInLoveCooldown() ? 1 : 0));
            break;
        }  // case mtOcelot
 
        case mtPig:
        {
            auto & Pig = static_cast<const cPig &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Pig.IsBaby() ? -1 : (Pig.IsInLoveCooldown() ? 1 : 0));
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(Pig.IsSaddled() ? 1 : 0);
            break;
        }  // case mtPig
 
        case mtSheep:
        {
            auto & Sheep = static_cast<const cSheep &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Sheep.IsBaby() ? -1 : (Sheep.IsInLoveCooldown() ? 1 : 0));
 
            a_Pkt.WriteBEUInt8(0x10);
            Byte SheepMetadata = 0;
            SheepMetadata = static_cast<Byte>(Sheep.GetFurColor());
            if (Sheep.IsSheared())
            {
                SheepMetadata |= 0x10;
            }
            a_Pkt.WriteBEUInt8(SheepMetadata);
            break;
        }  // case mtSheep
 
        case mtRabbit:
        {
            auto & Rabbit = static_cast<const cRabbit &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x12);
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(Rabbit.GetRabbitType()));
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Rabbit.IsBaby() ? -1 : (Rabbit.IsInLoveCooldown() ? 1 : 0));
            break;
        }  // case mtRabbit
 
        case mtSlime:
        {
            auto & Slime = static_cast<const cSlime &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(Slime.GetSize()));
            break;
        }  // case mtSlime
 
        case mtSkeleton:
        case mtStray:
        {
            a_Pkt.WriteBEUInt8(0x0d);
            a_Pkt.WriteBEUInt8(0);  // Is normal skeleton
            break;
        }
 
        case mtVillager:
        {
            auto & Villager = static_cast<const cVillager &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x50);
            a_Pkt.WriteBEInt32(Villager.GetVilType());
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Villager.IsBaby() ? -1 : 0);
            break;
        }  // case mtVillager
 
        case mtWitch:
        {
            auto & Witch = static_cast<const cWitch &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x15);
            a_Pkt.WriteBEUInt8(Witch.IsAngry() ? 1 : 0);
            break;
        }  // case mtWitch
 
        case mtWither:
        {
            auto & Wither = static_cast<const cWither &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x54);  // Int at index 20
            a_Pkt.WriteBEInt32(static_cast<Int32>(Wither.GetWitherInvulnerableTicks()));
            a_Pkt.WriteBEUInt8(0x66);  // Float at index 6
            a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));
            break;
        }  // case mtWither
 
        case mtWitherSkeleton:
        {
            a_Pkt.WriteBEUInt8(0x0d);
            a_Pkt.WriteBEUInt8(1);  // Is wither skeleton
            break;
        }  // case mtWitherSkeleton
 
        case mtWolf:
        {
            auto & Wolf = static_cast<const cWolf &>(a_Mob);
            Byte WolfStatus = 0;
            if (Wolf.IsSitting())
            {
                WolfStatus |= 0x1;
            }
            if (Wolf.IsAngry())
            {
                WolfStatus |= 0x2;
            }
            if (Wolf.IsTame())
            {
                WolfStatus |= 0x4;
            }
            a_Pkt.WriteBEUInt8(0x10);
            a_Pkt.WriteBEUInt8(WolfStatus);
 
            a_Pkt.WriteBEUInt8(0x72);
            a_Pkt.WriteBEFloat(static_cast<float>(a_Mob.GetHealth()));
            a_Pkt.WriteBEUInt8(0x13);
            a_Pkt.WriteBEUInt8(Wolf.IsBegging() ? 1 : 0);
            a_Pkt.WriteBEUInt8(0x14);
            a_Pkt.WriteBEUInt8(static_cast<UInt8>(Wolf.GetCollarColor()));
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Wolf.IsBaby() ? -1 : 0);
            break;
        }  // case mtWolf
 
        case mtHusk:
        case mtZombie:
        {
            auto & Zombie = static_cast<const cZombie &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(Zombie.IsBaby() ? 1 : -1);
            a_Pkt.WriteBEUInt8(0x0d);
            a_Pkt.WriteBEUInt8(0);
            a_Pkt.WriteBEUInt8(0x0e);
            a_Pkt.WriteBEUInt8(0);
            break;
        }  // case mtZombie
 
        case mtZombiePigman:
        {
            auto & ZombiePigman = static_cast<const cZombiePigman &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(ZombiePigman.IsBaby() ? 1 : -1);
            break;
        }  // case mtZombiePigman
 
        case mtZombieVillager:
        {
            auto & ZombieVillager = reinterpret_cast<const cZombieVillager &>(a_Mob);
            a_Pkt.WriteBEUInt8(0x0c);
            a_Pkt.WriteBEInt8(ZombieVillager.IsBaby() ? 1 : -1);
            a_Pkt.WriteBEUInt8(0x0d);
            a_Pkt.WriteBEUInt8(1);
            a_Pkt.WriteBEUInt8(0x0e);
            a_Pkt.WriteBEUInt8((ZombieVillager.ConversionTime() == -1) ? 0 : 1);
            break;
        }  // case mtZombieVillager
 
        case mtBlaze:
        case mtElderGuardian:
        case mtGuardian:
        {
            // TODO: Mobs with extra fields that aren't implemented
            break;
        }
 
        case mtCat:
 
 
        case mtDonkey:
        case mtMule:
        case mtSkeletonHorse:
        case mtZombieHorse:
        {
            // Todo: Mobs not added yet. Grouped ones have the same metadata
            ASSERT(!"cProtocol_1_8::WriteMobMetadata: received unimplemented type");
            break;
        }
 
        case mtCaveSpider:
        case mtEnderDragon:
        case mtGiant:
        case mtIronGolem:
        case mtMooshroom:
        case mtSilverfish:
        case mtEndermite:
        case mtSnowGolem:
        case mtSpider:
        case mtSquid:
        {
            // Allowed mobs without additional metadata
            break;
        }
 
        default: UNREACHABLE("cProtocol_1_8::WriteMobMetadata: received mob of invalid type");
    }  // switch (a_Mob.GetType())
}
 
 
 
 
 
void cProtocol_1_8_0::AddReceivedData(cByteBuffer & a_Buffer, const ContiguousByteBufferView a_Data)
{
    // Write the incoming data into the comm log file:
    if (g_ShouldLogCommIn && m_CommLogFile.IsOpen())
    {
        if (a_Buffer.GetReadableSpace() > 0)
        {
            ContiguousByteBuffer AllData;
            size_t OldReadableSpace = a_Buffer.GetReadableSpace();
            a_Buffer.ReadAll(AllData);
            a_Buffer.ResetRead();
            a_Buffer.SkipRead(a_Buffer.GetReadableSpace() - OldReadableSpace);
            ASSERT(a_Buffer.GetReadableSpace() == OldReadableSpace);
            AString Hex;
            CreateHexDump(Hex, AllData.data(), AllData.size(), 16);
            m_CommLogFile.Write(fmt::format(
                FMT_STRING("Incoming data, {0} (0x{0:x}) unparsed bytes already present in buffer:\n{1}\n"),
                AllData.size(), Hex
            ));
        }
        AString Hex;
        CreateHexDump(Hex, a_Data.data(), a_Data.size(), 16);
        m_CommLogFile.Write(fmt::format(
            FMT_STRING("Incoming data: {0} (0x{0:x}) bytes: \n{1}\n"),
            a_Data.size(), Hex
        ));
        m_CommLogFile.Flush();
    }
 
    if (!a_Buffer.Write(a_Data.data(), a_Data.size()))
    {
        // Too much data in the incoming queue, report to caller:
        m_Client->PacketBufferFull();
        return;
    }
 
    // Handle all complete packets:
    for (;;)
    {
        UInt32 PacketLen;
        if (!a_Buffer.ReadVarInt(PacketLen))
        {
            // Not enough data
            a_Buffer.ResetRead();
            break;
        }
        if (!a_Buffer.CanReadBytes(PacketLen))
        {
            // The full packet hasn't been received yet
            a_Buffer.ResetRead();
            break;
        }
 
        // Check packet for compression:
        if (m_State == 3)
        {
            UInt32 NumBytesRead = static_cast<UInt32>(a_Buffer.GetReadableSpace());
 
            UInt32 UncompressedSize;
            if (!a_Buffer.ReadVarInt(UncompressedSize))
            {
                m_Client->Kick("Compression packet incomplete");
                return;
            }
 
            NumBytesRead -= static_cast<UInt32>(a_Buffer.GetReadableSpace());  // How many bytes has the UncompressedSize taken up?
            ASSERT(PacketLen > NumBytesRead);
            PacketLen -= NumBytesRead;
 
            if (UncompressedSize > 0)
            {
                // Decompress the data:
                m_Extractor.ReadFrom(a_Buffer, PacketLen);
                a_Buffer.CommitRead();
 
                const auto UncompressedData = m_Extractor.Extract(UncompressedSize);
                const auto Uncompressed = UncompressedData.GetView();
                cByteBuffer bb(Uncompressed.size());
 
                // Compression was used, move the uncompressed data:
                VERIFY(bb.Write(Uncompressed.data(), Uncompressed.size()));
 
                HandlePacket(bb);
                continue;
            }
        }
 
        // Move the packet payload to a separate cByteBuffer, bb:
        cByteBuffer bb(PacketLen);
 
        // No compression was used, move directly:
        VERIFY(a_Buffer.ReadToByteBuffer(bb, static_cast<size_t>(PacketLen)));
        a_Buffer.CommitRead();
 
        HandlePacket(bb);
    }  // for (ever)
 
    // Log any leftover bytes into the logfile:
    if (g_ShouldLogCommIn && (a_Buffer.GetReadableSpace() > 0) && m_CommLogFile.IsOpen())
    {
        ContiguousByteBuffer AllData;
        size_t OldReadableSpace = a_Buffer.GetReadableSpace();
        a_Buffer.ReadAll(AllData);
        a_Buffer.ResetRead();
        a_Buffer.SkipRead(a_Buffer.GetReadableSpace() - OldReadableSpace);
        ASSERT(a_Buffer.GetReadableSpace() == OldReadableSpace);
        AString Hex;
        CreateHexDump(Hex, AllData.data(), AllData.size(), 16);
        m_CommLogFile.Write(fmt::format(
            FMT_STRING("There are {0} (0x{0:x}) bytes of non-parse-able data left in the buffer:\n{1}"),
            a_Buffer.GetReadableSpace(), Hex
        ));
        m_CommLogFile.Flush();
    }
}
 
 
 
 
 
UInt8 cProtocol_1_8_0::GetProtocolEntityType(const cEntity & a_Entity) const
{
    using Type = cEntity::eEntityType;
 
    switch (a_Entity.GetEntityType())
    {
        case Type::etEnderCrystal: return 51;
        case Type::etPickup: return 2;
        case Type::etFallingBlock: return 70;
        case Type::etMinecart: return 10;
        case Type::etBoat: return 1;
        case Type::etTNT: return 50;
        case Type::etProjectile:
        {
            using PType = cProjectileEntity::eKind;
            const auto & Projectile = static_cast<const cProjectileEntity &>(a_Entity);
 
            switch (Projectile.GetProjectileKind())
            {
                case PType::pkArrow: return 60;
                case PType::pkSnowball: return 61;
                case PType::pkEgg: return 62;
                case PType::pkGhastFireball: return 63;
                case PType::pkFireCharge: return 64;
                case PType::pkEnderPearl: return 65;
                case PType::pkExpBottle: return 75;
                case PType::pkSplashPotion: return 73;
                case PType::pkFirework: return 76;
                case PType::pkWitherSkull: return 66;
            }
 
            break;
        }
        case Type::etFloater: return 90;
        case Type::etItemFrame: return 71;
        case Type::etLeashKnot: return 77;
 
        // Non-objects must not be sent
        case Type::etEntity:
        case Type::etPlayer:
        case Type::etMonster:
        case Type::etExpOrb:
        case Type::etPainting: break;
    }
    UNREACHABLE("Unhandled entity kind");
}
 
 
 
 
 
int cProtocol_1_8_0::GetProtocolParticleID(const AString & a_ParticleName) const
{
    static const std::unordered_map<AString, int> ParticleMap
    {
        // Initialize the ParticleMap:
        { "explode",          0 },
        { "largeexplode",     1 },
        { "hugeexplosion",    2 },
        { "fireworksspark",   3 },
        { "bubble",           4 },
        { "splash",           5 },
        { "wake",             6 },
        { "suspended",        7 },
        { "depthsuspend",     8 },
        { "crit",             9 },
        { "magiccrit",        10 },
        { "smoke",            11 },
        { "largesmoke",       12 },
        { "spell",            13 },
        { "instantspell",     14 },
        { "mobspell",         15 },
        { "mobspellambient",  16 },
        { "witchmagic",       17 },
        { "dripwater",        18 },
        { "driplava",         19 },
        { "angryvillager",    20 },
        { "happyvillager",    21 },
        { "townaura",         22 },
        { "note",             23 },
        { "portal",           24 },
        { "enchantmenttable", 25 },
        { "flame",            26 },
        { "lava",             27 },
        { "footstep",         28 },
        { "cloud",            29 },
        { "reddust",          30 },
        { "snowballpoof",     31 },
        { "snowshovel",       32 },
        { "slime",            33 },
        { "heart",            34 },
        { "barrier",          35 },
        { "iconcrack",        36 },
        { "blockcrack",       37 },
        { "blockdust",        38 },
        { "droplet",          39 },
        { "take",             40 },
        { "mobappearance",    41 },
        { "dragonbreath",     42 },
        { "endrod",           43 },
        { "damageindicator",  44 },
        { "sweepattack",      45 },
        { "fallingdust",      46 },
        { "totem",            47 },
        { "spit",             48 }
    };
 
    const auto ParticleName = StrToLower(a_ParticleName);
    const auto FindResult = ParticleMap.find(ParticleName);
    if (FindResult == ParticleMap.end())
    {
        LOGWARNING("Unknown particle: %s", a_ParticleName.c_str());
        ASSERT(!"Unknown particle");
        return 0;
    }
 
    return FindResult->second;
}
 
 
 
 
 
const char * cProtocol_1_8_0::GetProtocolStatisticName(const CustomStatistic a_Statistic)
{
    switch (a_Statistic)
    {
        // V1.8 Achievements
        case CustomStatistic::AchOpenInventory:        return "achievement.openInventory";
        case CustomStatistic::AchMineWood:             return "achievement.mineWood";
        case CustomStatistic::AchBuildWorkBench:       return "achievement.buildWorkBench";
        case CustomStatistic::AchBuildPickaxe:         return "achievement.buildPickaxe";
        case CustomStatistic::AchBuildFurnace:         return "achievement.buildFurnace";
        case CustomStatistic::AchAcquireIron:          return "achievement.acquireIron";
        case CustomStatistic::AchBuildHoe:             return "achievement.buildHoe";
        case CustomStatistic::AchMakeBread:            return "achievement.makeBread";
        case CustomStatistic::AchBakeCake:             return "achievement.bakeCake";
        case CustomStatistic::AchBuildBetterPickaxe:   return "achievement.buildBetterPickaxe";
        case CustomStatistic::AchCookFish:             return "achievement.cookFish";
        case CustomStatistic::AchOnARail:              return "achievement.onARail";
        case CustomStatistic::AchBuildSword:           return "achievement.buildSword";
        case CustomStatistic::AchKillEnemy:            return "achievement.killEnemy";
        case CustomStatistic::AchKillCow:              return "achievement.killCow";
        case CustomStatistic::AchFlyPig:               return "achievement.flyPig";
        case CustomStatistic::AchSnipeSkeleton:        return "achievement.snipeSkeleton";
        case CustomStatistic::AchDiamonds:             return "achievement.diamonds";
        case CustomStatistic::AchPortal:               return "achievement.portal";
        case CustomStatistic::AchGhast:                return "achievement.ghast";
        case CustomStatistic::AchBlazeRod:             return "achievement.blazeRod";
        case CustomStatistic::AchPotion:               return "achievement.potion";
        case CustomStatistic::AchTheEnd:               return "achievement.theEnd";
        case CustomStatistic::AchTheEnd2:              return "achievement.theEnd2";
        case CustomStatistic::AchEnchantments:         return "achievement.enchantments";
        case CustomStatistic::AchOverkill:             return "achievement.overkill";
        case CustomStatistic::AchBookcase:             return "achievement.bookcase";
        case CustomStatistic::AchExploreAllBiomes:     return "achievement.exploreAllBiomes";
        case CustomStatistic::AchSpawnWither:          return "achievement.spawnWither";
        case CustomStatistic::AchKillWither:           return "achievement.killWither";
        case CustomStatistic::AchFullBeacon:           return "achievement.fullBeacon";
        case CustomStatistic::AchBreedCow:             return "achievement.breedCow";
        case CustomStatistic::AchDiamondsToYou:        return "achievement.diamondsToYou";
 
        // V1.8 stats
        case CustomStatistic::AnimalsBred:               return "stat.animalsBred";
        case CustomStatistic::BoatOneCm:                 return "stat.boatOneCm";
        case CustomStatistic::ClimbOneCm:                return "stat.climbOneCm";
        case CustomStatistic::CrouchOneCm:               return "stat.crouchOneCm";
        case CustomStatistic::DamageDealt:               return "stat.damageDealt";
        case CustomStatistic::DamageTaken:               return "stat.damageTaken";
        case CustomStatistic::Deaths:                    return "stat.deaths";
        case CustomStatistic::Drop:                      return "stat.drop";
        case CustomStatistic::FallOneCm:                 return "stat.fallOneCm";
        case CustomStatistic::FishCaught:                return "stat.fishCaught";
        case CustomStatistic::FlyOneCm:                  return "stat.flyOneCm";
        case CustomStatistic::HorseOneCm:                return "stat.horseOneCm";
        case CustomStatistic::Jump:                      return "stat.jump";
        case CustomStatistic::LeaveGame:                 return "stat.leaveGame";
        case CustomStatistic::MinecartOneCm:             return "stat.minecartOneCm";
        case CustomStatistic::MobKills:                  return "stat.mobKills";
        case CustomStatistic::PigOneCm:                  return "stat.pigOneCm";
        case CustomStatistic::PlayerKills:               return "stat.playerKills";
        case CustomStatistic::PlayOneMinute:             return "stat.playOneMinute";
        case CustomStatistic::SprintOneCm:               return "stat.sprintOneCm";
        case CustomStatistic::SwimOneCm:                 return "stat.swimOneCm";
        case CustomStatistic::TalkedToVillager:          return "stat.talkedToVillager";
        case CustomStatistic::TimeSinceDeath:            return "stat.timeSinceDeath";
        case CustomStatistic::TradedWithVillager:        return "stat.tradedWithVillager";
        case CustomStatistic::WalkOneCm:                 return "stat.walkOneCm";
        case CustomStatistic::WalkUnderWaterOneCm:       return "stat.diveOneCm";
 
        // V1.8.2 stats
        case CustomStatistic::CleanArmor:                return "stat.armorCleaned";
        case CustomStatistic::CleanBanner:               return "stat.bannerCleaned";
        case CustomStatistic::EatCakeSlice:              return "stat.cakeSlicesEaten";
        case CustomStatistic::EnchantItem:               return "stat.itemEnchanted";
        case CustomStatistic::FillCauldron:              return "stat.cauldronFilled";
        case CustomStatistic::InspectDispenser:          return "stat.dispenserInspected";
        case CustomStatistic::InspectDropper:            return "stat.dropperInspected";
        case CustomStatistic::InspectHopper:             return "stat.hopperInspected";
        case CustomStatistic::InteractWithBeacon:        return "stat.beaconInteraction";
        case CustomStatistic::InteractWithBrewingstand:  return "stat.brewingstandInteraction";
        case CustomStatistic::InteractWithCraftingTable: return "stat.craftingTableInteraction";
        case CustomStatistic::InteractWithFurnace:       return "stat.furnaceInteraction";
        case CustomStatistic::OpenChest:                 return "stat.chestOpened";
        case CustomStatistic::OpenEnderchest:            return "stat.enderchestOpened";
        case CustomStatistic::PlayNoteblock:             return "stat.noteblockPlayed";
        case CustomStatistic::PlayRecord:                return "stat.recordPlayed";
        case CustomStatistic::PotFlower:                 return "stat.flowerPotted";
        case CustomStatistic::TriggerTrappedChest:       return "stat.trappedChestTriggered";
        case CustomStatistic::TuneNoteblock:             return "stat.noteblockTuned";
        case CustomStatistic::UseCauldron:               return "stat.cauldronUsed";
 
        // V1.9 stats
        case CustomStatistic::AviateOneCm:               return "stat.aviateOneCm";
        case CustomStatistic::SleepInBed:                return "stat.sleepInBed";
        case CustomStatistic::SneakTime:                 return "stat.sneakTime";
        default:                                   return "";
    }
}
 
 
 
 
 
void cProtocol_1_8_0::HandlePacket(cByteBuffer & a_Buffer)
{
    UInt32 PacketType;
    if (!a_Buffer.ReadVarInt(PacketType))
    {
        // Not enough data
        return;
    }
 
    // Log the packet info into the comm log file:
    if (g_ShouldLogCommIn && m_CommLogFile.IsOpen())
    {
        ContiguousByteBuffer PacketData;
        a_Buffer.ReadAll(PacketData);
        a_Buffer.ResetRead();
        a_Buffer.ReadVarInt(PacketType);  // We have already read the packet type once, it will be there again
        ASSERT(PacketData.size() > 0);  // We have written an extra NUL, so there had to be at least one byte read
        PacketData.resize(PacketData.size() - 1);
        AString PacketDataHex;
        CreateHexDump(PacketDataHex, PacketData.data(), PacketData.size(), 16);
        m_CommLogFile.Write(fmt::format(
            FMT_STRING("Next incoming packet is type {0} (0x{0:x}), length {1} (0x{1:x}) at state {2}. Payload:\n{3}\n"),
            PacketType, a_Buffer.GetUsedSpace(), m_State, PacketDataHex
        ));
    }
 
    if (!HandlePacket(a_Buffer, PacketType))
    {
        // Unknown packet, already been reported, but without the length. Log the length here:
        LOGWARNING("Unhandled packet: type 0x%x, state %d, length %u", PacketType, m_State, a_Buffer.GetUsedSpace());
 
#ifndef NDEBUG
        // Dump the packet contents into the log:
        a_Buffer.ResetRead();
        ContiguousByteBuffer Packet;
        a_Buffer.ReadAll(Packet);
        Packet.resize(Packet.size() - 1);  // Drop the final NUL pushed there for over-read detection
        AString Out;
        CreateHexDump(Out, Packet.data(), Packet.size(), 24);
        LOGD("Packet contents:\n%s", Out.c_str());
#endif  // !NDEBUG
 
        // Put a message in the comm log:
        if (g_ShouldLogCommIn && m_CommLogFile.IsOpen())
        {
            m_CommLogFile.Write("^^^^^^ Unhandled packet ^^^^^^\n\n\n");
        }
 
        return;
    }
 
    // The packet should have nothing left in the buffer:
    if (a_Buffer.GetReadableSpace() != 0)
    {
        // Read more or less than packet length, report as error
        LOGWARNING("Protocol 1.8: Wrong number of bytes read for packet 0x%x, state %d. Read %zu bytes, packet contained %u bytes",
            PacketType, m_State, a_Buffer.GetUsedSpace() - a_Buffer.GetReadableSpace(), a_Buffer.GetUsedSpace()
        );
 
        // Put a message in the comm log:
        if (g_ShouldLogCommIn && m_CommLogFile.IsOpen())
        {
            m_CommLogFile.Write(fmt::format(
                FMT_STRING("^^^^^^ Wrong number of bytes read for this packet (exp 1 left, got {} left) ^^^^^^\n\n\n"),
                a_Buffer.GetReadableSpace()
            ));
            m_CommLogFile.Flush();
        }
 
        ASSERT(!"Read wrong number of bytes!");
        m_Client->PacketError(PacketType);
    }
}
 
 
 
 
 
void cProtocol_1_8_0::StartEncryption(const Byte * a_Key)
{
    m_Encryptor.Init(a_Key, a_Key);
    m_Decryptor.Init(a_Key, a_Key);
    m_IsEncrypted = true;
 
    // Prepare the m_AuthServerID:
    cSha1Checksum Checksum;
    cServer * Server = cRoot::Get()->GetServer();
    const AString & ServerID = Server->GetServerID();
    Checksum.Update(reinterpret_cast<const Byte *>(ServerID.c_str()), ServerID.length());
    Checksum.Update(a_Key, 16);
    Checksum.Update(reinterpret_cast<const Byte *>(Server->GetPublicKeyDER().data()), Server->GetPublicKeyDER().size());
    Byte Digest[20];
    Checksum.Finalize(Digest);
    cSha1Checksum::DigestToJava(Digest, m_AuthServerID);
}