WorldSession.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "WorldSession.h"
#include "AccountMgr.h"
#include "AddonMgr.h"
#include "BattlegroundMgr.h"
#include "CharacterPackets.h"
#include "ClientConfigPackets.h"
#include "Config.h"
#include "Common.h"
#include "Containers.h"
#include "DatabaseEnv.h"
#include "DBCStructure.h"
#include "GameClient.h"
#include "GameTime.h"
#include "Group.h"
#include "Guild.h"
#include "GuildMgr.h"
#include "Hyperlinks.h"
#include "Log.h"
#include "Map.h"
#include "Metric.h"
#include "MovementPackets.h"
#include "MoveSpline.h"
#include "ObjectAccessor.h"
#include "ObjectMgr.h"
#include "Opcodes.h"
#include "OutdoorPvPMgr.h"
#include "PacketUtilities.h"
#include "Player.h"
#include "Realm.h"
#include "ScriptMgr.h"
#include "SocialMgr.h"
#include "QueryHolder.h"
#include "Vehicle.h"
#include "WardenMac.h"
#include "WardenWin.h"
#include "World.h"
#include "WorldPacket.h"
#include "WorldSocket.h"
#include <boost/circular_buffer.hpp>
#include <zlib.h>
 
namespace {
 
std::string const DefaultPlayerName = "<none>";
 
} // namespace
 
bool MapSessionFilter::Process(WorldPacket* packet)
{
    ClientOpcodeHandler const* opHandle = opcodeTable[static_cast<OpcodeClient>(packet->GetOpcode())];
 
    //let's check if our opcode can be really processed in Map::Update()
    if (opHandle->ProcessingPlace == PROCESS_INPLACE)
        return true;
 
    //we do not process thread-unsafe packets
    if (opHandle->ProcessingPlace == PROCESS_THREADUNSAFE)
        return false;
 
    Player* player = m_pSession->GetPlayer();
    if (!player)
        return false;
 
    //in Map::Update() we do not process packets where player is not in world!
    return player->IsInWorld();
}
 
//we should process ALL packets when player is not in world/logged in
//OR packet handler is not thread-safe!
bool WorldSessionFilter::Process(WorldPacket* packet)
{
    ClientOpcodeHandler const* opHandle = opcodeTable[static_cast<OpcodeClient>(packet->GetOpcode())];
 
    //check if packet handler is supposed to be safe
    if (opHandle->ProcessingPlace == PROCESS_INPLACE)
        return true;
 
    //thread-unsafe packets should be processed in World::UpdateSessions()
    if (opHandle->ProcessingPlace == PROCESS_THREADUNSAFE)
        return true;
 
    //no player attached? -> our client! ^^
    Player* player = m_pSession->GetPlayer();
    if (!player)
        return true;
 
    //lets process all packets for non-in-the-world player
    return (player->IsInWorld() == false);
}
 
WorldSession::WorldSession(uint32 id, std::string&& name, std::shared_ptr<WorldSocket> sock, AccountTypes sec, uint8 expansion, time_t mute_time,
    Minutes timezoneOffset, LocaleConstant locale, uint32 recruiter, bool isARecruiter):
    m_muteTime(mute_time),
    m_timeOutTime(0),
    AntiDOS(this),
    m_GUIDLow(0),
    _player(nullptr),
    m_Socket(std::move(sock)),
    _security(sec),
    _accountId(id),
    _accountName(std::move(name)),
    m_expansion(expansion),
    _logoutTime(0),
    m_inQueue(false),
    m_playerLoading(false),
    m_playerLogout(false),
    m_playerRecentlyLogout(false),
    m_playerSave(false),
    m_sessionDbcLocale(sWorld->GetAvailableDbcLocale(locale)),
    m_sessionDbLocaleIndex(locale),
    _timezoneOffset(timezoneOffset),
    m_latency(0),
    m_TutorialsChanged(TUTORIALS_FLAG_NONE),
    recruiterId(recruiter),
    isRecruiter(isARecruiter),
    _RBACData(nullptr),
    expireTime(60000), // 1 min after socket loss, session is deleted
    forceExit(false),
    m_currentBankerGUID(),
    _timeSyncClockDeltaQueue(std::make_unique<boost::circular_buffer<std::pair<int64, uint32>>>(6)),
    _timeSyncClockDelta(0),
    _pendingTimeSyncRequests(),
    _timeSyncNextCounter(0),
    _timeSyncTimer(0),
    _calendarEventCreationCooldown(0),
    _gameClient(new GameClient(this))
{
    memset(m_Tutorials, 0, sizeof(m_Tutorials));
 
    if (m_Socket)
    {
        m_Address = m_Socket->GetRemoteIpAddress().to_string();
        ResetTimeOutTime(false);
        LoginDatabase.PExecute("UPDATE account SET online = 1 WHERE id = {};", GetAccountId());     // One-time query
    }
 
}
 
WorldSession::~WorldSession()
{
    if (_player)
        LogoutPlayer (true);
 
    if (m_Socket)
    {
        m_Socket->CloseSocket();
        m_Socket = nullptr;
    }
 
    delete _RBACData;
 
    delete _gameClient;
 
    WorldPacket* packet = nullptr;
    while (_recvQueue.next(packet))
        delete packet;
 
    LoginDatabase.PExecute("UPDATE account SET online = 0 WHERE id = {};", GetAccountId());     // One-time query
}
 
std::string const & WorldSession::GetPlayerName() const
{
    return _player != nullptr ? _player->GetName() : DefaultPlayerName;
}
 
std::string WorldSession::GetPlayerInfo() const
{
    if (_player)
        return Trinity::StringFormat("[Player: {} {}, Account: {}]", _player->GetName(), _player->GetGUID(), GetAccountId());
 
    if (m_playerLoading)
        return Trinity::StringFormat("[Player: Logging in, Account: {}]", GetAccountId());
 
    return Trinity::StringFormat("[Player: Account: {}]", GetAccountId());
}
 
void WorldSession::SendPacket(WorldPacket const* packet)
{
    ASSERT(packet->GetOpcode() != NULL_OPCODE);
 
    if (!m_Socket)
        return;
 
#ifdef TRINITY_DEBUG
    // Code for network use statistic
    static uint64 sendPacketCount = 0;
    static uint64 sendPacketBytes = 0;
 
    static time_t firstTime = time(nullptr);
    static time_t lastTime = firstTime;                     // next 60 secs start time
 
    static uint64 sendLastPacketCount = 0;
    static uint64 sendLastPacketBytes = 0;
 
    time_t cur_time = time(nullptr);
 
    if ((cur_time - lastTime) < 60)
    {
        sendPacketCount += 1;
        sendPacketBytes += packet->size();
 
        sendLastPacketCount += 1;
        sendLastPacketBytes += packet->size();
    }
    else
    {
        uint64 minTime = uint64(cur_time - lastTime);
        uint64 fullTime = uint64(lastTime - firstTime);
        TC_LOG_DEBUG("misc", "Send all time packets count: {} bytes: {} avr.count/sec: {} avr.bytes/sec: {} time: {}", sendPacketCount, sendPacketBytes, float(sendPacketCount)/fullTime, float(sendPacketBytes)/fullTime, uint32(fullTime));
        TC_LOG_DEBUG("misc", "Send last min packets count: {} bytes: {} avr.count/sec: {} avr.bytes/sec: {}", sendLastPacketCount, sendLastPacketBytes, float(sendLastPacketCount)/minTime, float(sendLastPacketBytes)/minTime);
 
        lastTime = cur_time;
        sendLastPacketCount = 1;
        sendLastPacketBytes = packet->wpos();               // wpos is real written size
    }
#endif                                                      // !TRINITY_DEBUG
 
    sScriptMgr->OnPacketSend(this, *packet);
 
    TC_LOG_TRACE("network.opcode", "S->C: {} {}", GetPlayerInfo(), GetOpcodeNameForLogging(static_cast<OpcodeServer>(packet->GetOpcode())));
    m_Socket->SendPacket(*packet);
}
 
void WorldSession::QueuePacket(WorldPacket* new_packet)
{
    _recvQueue.add(new_packet);
}
 
void WorldSession::LogUnexpectedOpcode(WorldPacket* packet, char const* status, const char *reason)
{
    TC_LOG_ERROR("network.opcode", "Received unexpected opcode {} Status: {} Reason: {} from {}",
        GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())), status, reason, GetPlayerInfo());
}
 
void WorldSession::LogUnprocessedTail(WorldPacket* packet)
{
    if (!sLog->ShouldLog("network.opcode", LOG_LEVEL_TRACE) || packet->rpos() >= packet->wpos())
        return;
 
    TC_LOG_TRACE("network.opcode", "Unprocessed tail data (read stop at {} from {}) Opcode {} from {}",
        uint32(packet->rpos()), uint32(packet->wpos()), GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())), GetPlayerInfo());
    packet->print_storage();
}
 
bool WorldSession::Update(uint32 diff, PacketFilter& updater)
{
    if (IsConnectionIdle() && !HasPermission(rbac::RBAC_PERM_IGNORE_IDLE_CONNECTION))
        m_Socket->CloseSocket();
 
    WorldPacket* packet = nullptr;
    bool deletePacket = true;
    std::vector<WorldPacket*> requeuePackets;
    uint32 processedPackets = 0;
    time_t currentTime = GameTime::GetGameTime();
 
    constexpr uint32 MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE = 100;
 
    while (m_Socket && _recvQueue.next(packet, updater))
    {
        OpcodeClient opcode = static_cast<OpcodeClient>(packet->GetOpcode());
        ClientOpcodeHandler const* opHandle = opcodeTable[opcode];
        TC_METRIC_DETAILED_TIMER("worldsession_update_opcode_time", TC_METRIC_TAG("opcode", opHandle->Name));
 
        try
        {
            switch (opHandle->Status)
            {
                case STATUS_LOGGEDIN:
                    if (!_player)
                    {
                        // skip STATUS_LOGGEDIN opcode unexpected errors if player logout sometime ago - this can be network lag delayed packets
                        if (!m_playerRecentlyLogout)
                        {
                            requeuePackets.push_back(packet);
                            deletePacket = false;
                            TC_LOG_DEBUG("network", "Re-enqueueing packet with opcode {} with with status STATUS_LOGGEDIN. "
                                "Player is currently not in world yet.", GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())));
                        }
                    }
                    else if (_player->IsInWorld())
                    {
                        if(AntiDOS.EvaluateOpcode(*packet, currentTime))
                        {
                            sScriptMgr->OnPacketReceive(this, *packet);
                            opHandle->Call(this, *packet);
                            LogUnprocessedTail(packet);
                        }
                        else
                            processedPackets = MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE;   // break out of packet processing loop
                    }
                    // lag can cause STATUS_LOGGEDIN opcodes to arrive after the player started a transfer
                    break;
                case STATUS_LOGGEDIN_OR_RECENTLY_LOGGOUT:
                    if (!_player && !m_playerRecentlyLogout && !m_playerLogout) // There's a short delay between _player = null and m_playerRecentlyLogout = true during logout
                        LogUnexpectedOpcode(packet, "STATUS_LOGGEDIN_OR_RECENTLY_LOGGOUT",
                            "the player has not logged in yet and not recently logout");
                    else if (AntiDOS.EvaluateOpcode(*packet, currentTime))
                    {
                        // not expected _player or must checked in packet hanlder
                        sScriptMgr->OnPacketReceive(this, *packet);
                        opHandle->Call(this, *packet);
                        LogUnprocessedTail(packet);
                    }
                    else
                        processedPackets = MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE;   // break out of packet processing loop
                    break;
                case STATUS_TRANSFER:
                    if (!_player)
                        LogUnexpectedOpcode(packet, "STATUS_TRANSFER", "the player has not logged in yet");
                    else if (_player->IsInWorld())
                        LogUnexpectedOpcode(packet, "STATUS_TRANSFER", "the player is still in world");
                    else if (AntiDOS.EvaluateOpcode(*packet, currentTime))
                    {
                        sScriptMgr->OnPacketReceive(this, *packet);
                        opHandle->Call(this, *packet);
                        LogUnprocessedTail(packet);
                    }
                    else
                        processedPackets = MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE;   // break out of packet processing loop
                    break;
                case STATUS_AUTHED:
                    // prevent cheating with skip queue wait
                    if (m_inQueue)
                    {
                        LogUnexpectedOpcode(packet, "STATUS_AUTHED", "the player not pass queue yet");
                        break;
                    }
 
                    // some auth opcodes can be recieved before STATUS_LOGGEDIN_OR_RECENTLY_LOGGOUT opcodes
                    // however when we recieve CMSG_CHAR_ENUM we are surely no longer during the logout process.
                    if (packet->GetOpcode() == CMSG_CHAR_ENUM)
                        m_playerRecentlyLogout = false;
 
                    if (AntiDOS.EvaluateOpcode(*packet, currentTime))
                    {
                        sScriptMgr->OnPacketReceive(this, *packet);
                        opHandle->Call(this, *packet);
                        LogUnprocessedTail(packet);
                    }
                    else
                        processedPackets = MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE;   // break out of packet processing loop
                    break;
                case STATUS_NEVER:
                    TC_LOG_ERROR("network.opcode", "Received not allowed opcode {} from {}", GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode()))
                        , GetPlayerInfo());
                    break;
                case STATUS_UNHANDLED:
                    TC_LOG_DEBUG("network.opcode", "Received not handled opcode {} from {}", GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode()))
                        , GetPlayerInfo());
                    break;
            }
        }
        catch (WorldPackets::InvalidHyperlinkException const& ihe)
        {
            TC_LOG_ERROR("network", "{} sent {} with an invalid link:\n{}", GetPlayerInfo(),
                GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())), ihe.GetInvalidValue());
 
            if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_KICK))
                KickPlayer("WorldSession::Update Invalid chat link");
        }
        catch (WorldPackets::IllegalHyperlinkException const& ihe)
        {
            TC_LOG_ERROR("network", "{} sent {} which illegally contained a hyperlink:\n{}", GetPlayerInfo(),
                GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())), ihe.GetInvalidValue());
 
            if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_KICK))
                KickPlayer("WorldSession::Update Illegal chat link");
        }
        catch (WorldPackets::PacketArrayMaxCapacityException const& pamce)
        {
            TC_LOG_ERROR("network", "PacketArrayMaxCapacityException: {} while parsing {} from {}.",
                pamce.what(), GetOpcodeNameForLogging(static_cast<OpcodeClient>(packet->GetOpcode())), GetPlayerInfo());
        }
        catch (ByteBufferException const&)
        {
            TC_LOG_ERROR("network", "WorldSession::Update ByteBufferException occured while parsing a packet (opcode: {}) from client {}, accountid={}. Skipped packet.",
                    packet->GetOpcode(), GetRemoteAddress(), GetAccountId());
            packet->hexlike();
        }
 
        if (deletePacket)
            delete packet;
 
        deletePacket = true;
 
        processedPackets++;
 
        //process only a max amout of packets in 1 Update() call.
        //Any leftover will be processed in next update
        if (processedPackets > MAX_PROCESSED_PACKETS_IN_SAME_WORLDSESSION_UPDATE)
            break;
    }
 
    TC_METRIC_VALUE("processed_packets", processedPackets);
 
    _recvQueue.readd(requeuePackets.begin(), requeuePackets.end());
 
    if (!updater.ProcessUnsafe()) // <=> updater is of type MapSessionFilter
    {
        // Send time sync packet every 10s.
        if (_timeSyncTimer > 0)
        {
            if (diff >= _timeSyncTimer)
                SendTimeSync();
            else
                _timeSyncTimer -= diff;
        }
    }
 
    ProcessQueryCallbacks();
 
    //check if we are safe to proceed with logout
    //logout procedure should happen only in World::UpdateSessions() method!!!
    if (updater.ProcessUnsafe())
    {
        if (m_Socket && m_Socket->IsOpen() && _warden)
            _warden->Update(diff);
 
        if (ShouldLogOut(currentTime) && !m_playerLoading)
            LogoutPlayer(true);
 
        if (m_Socket && !m_Socket->IsOpen())
        {
            if (GetPlayer() && _warden)
                _warden->Update(diff);
 
            expireTime -= expireTime > diff ? diff : expireTime;
            if (expireTime < diff || forceExit || !GetPlayer())
            {
                m_Socket = nullptr;
            }
        }
 
        if (!m_Socket)
            return false;                                       //Will remove this session from the world session map
    }
 
    return true;
}
 
void WorldSession::LogoutPlayer(bool save)
{
    // finish pending transfers before starting the logout
    while (_player && _player->IsBeingTeleportedFar())
        HandleMoveWorldportAck();
 
    m_playerLogout = true;
    m_playerSave = save;
 
    if (_player)
    {
        ObjectGuid lguid = _player->GetLootGUID();
        if (!lguid.IsEmpty())
            DoLootRelease(lguid);
 
        if (_player->GetDeathTimer())
        {
            _player->CombatStop();
            _player->BuildPlayerRepop();
            _player->RepopAtGraveyard();
        }
        else if (_player->HasAuraType(SPELL_AURA_SPIRIT_OF_REDEMPTION))
        {
            // this will kill character by SPELL_AURA_SPIRIT_OF_REDEMPTION
            _player->RemoveAurasByType(SPELL_AURA_MOD_SHAPESHIFT);
            _player->KillPlayer();
            _player->BuildPlayerRepop();
            _player->RepopAtGraveyard();
        }
        else if (_player->HasPendingBind())
        {
            _player->RepopAtGraveyard();
            _player->SetPendingBind(0, 0);
        }
 
        //drop a flag if player is carrying it
        if (Battleground* bg = _player->GetBattleground())
            bg->EventPlayerLoggedOut(_player);
 
        sOutdoorPvPMgr->HandlePlayerLeaveZone(_player, _player->GetZoneId());
 
        for (int i=0; i < PLAYER_MAX_BATTLEGROUND_QUEUES; ++i)
        {
            BattlegroundQueueTypeId bgQueueTypeId = _player->GetBattlegroundQueueTypeId(i);
            if (bgQueueTypeId != BATTLEGROUND_QUEUE_NONE)
            {
                // track if player logs out after invited to join BG
                if (_player->IsInvitedForBattlegroundQueueType(bgQueueTypeId) && sWorld->getBoolConfig(CONFIG_BATTLEGROUND_TRACK_DESERTERS))
                {
                    CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_DESERTER_TRACK);
                    stmt->setUInt32(0, _player->GetGUID().GetCounter());
                    stmt->setUInt8(1, BG_DESERTION_TYPE_INVITE_LOGOUT);
                    CharacterDatabase.Execute(stmt);
                }
 
                _player->RemoveBattlegroundQueueId(bgQueueTypeId);
                BattlegroundQueue& queue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
                queue.RemovePlayer(_player->GetGUID(), true);
            }
        }
 
        // Repop at Graveyard or other player far teleport will prevent saving player because of not present map
        // Teleport player immediately for correct player save
        while (_player->IsBeingTeleportedFar())
            HandleMoveWorldportAck();
 
        if (Guild* guild = sGuildMgr->GetGuildById(_player->GetGuildId()))
            guild->HandleMemberLogout(this);
 
        _player->RemovePet(nullptr, PET_SAVE_AS_CURRENT);
 
        _player->ClearWhisperWhiteList();
 
        // some save parts only correctly work in case player present in map/player_lists (pets, etc)
        if (save)
        {
            uint32 eslot;
            for (int j = BUYBACK_SLOT_START; j < BUYBACK_SLOT_END; ++j)
            {
                eslot = j - BUYBACK_SLOT_START;
                _player->SetGuidValue(PLAYER_FIELD_VENDORBUYBACK_SLOT_1 + (eslot * 2), ObjectGuid::Empty);
                _player->SetUInt32Value(PLAYER_FIELD_BUYBACK_PRICE_1 + eslot, 0);
                _player->SetUInt32Value(PLAYER_FIELD_BUYBACK_TIMESTAMP_1 + eslot, 0);
            }
            _player->SaveToDB();
        }
 
        _player->CleanupChannels();
 
        _player->UninviteFromGroup();
 
        if (Group* group = _player->GetGroup())
        {
            group->SendUpdate();
            group->ResetMaxEnchantingLevel();
            if (group->GetLeaderGUID() == _player->GetGUID())
                group->StartLeaderOfflineTimer();
        }
 
        sSocialMgr->SendFriendStatus(_player, FRIEND_OFFLINE, _player->GetGUID(), true);
        _player->RemoveSocial();
 
        sScriptMgr->OnPlayerLogout(_player);
 
        TC_METRIC_EVENT("player_events", "Logout", _player->GetName());
 
        // the player may not be in the world when logging out
        // e.g if he got disconnected during a transfer to another map
        // calls to GetMap in this case may cause crashes
        _player->CleanupsBeforeDelete();
        TC_LOG_INFO("entities.player.character", "Account: {} (IP: {}) Logout Character:[{}] {} Level: {}, XP: {}/{} ({} left)",
            GetAccountId(), GetRemoteAddress(), _player->GetName(), _player->GetGUID().ToString(), _player->GetLevel(),
            _player->GetXP(), _player->GetXPForNextLevel(), std::max(0, (int32)_player->GetXPForNextLevel() - (int32)_player->GetXP()));
        if (Map* _map = _player->FindMap())
            _map->RemovePlayerFromMap(_player, true);
 
        SetPlayer(nullptr); 
 
        SendPacket(WorldPackets::Character::LogoutComplete().Write());
        TC_LOG_DEBUG("network", "SESSION: Sent SMSG_LOGOUT_COMPLETE Message");
 
        CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_UPD_ACCOUNT_ONLINE);
        stmt->setUInt32(0, GetAccountId());
        CharacterDatabase.Execute(stmt);
    }
 
    m_playerLogout = false;
    m_playerSave = false;
    m_playerRecentlyLogout = true;
    SetLogoutStartTime(0);
}
 
void WorldSession::KickPlayer(std::string const& reason)
{
    if (m_Socket)
    {
        TC_LOG_INFO("network.kick", "Account: {} Character: '{}' {} kicked with reason: {}", GetAccountId(), _player ? _player->GetName() : "<none>",
            _player ? _player->GetGUID().ToString() : "", reason);
 
        m_Socket->CloseSocket();
        forceExit = true;
    }
}
 
bool WorldSession::ValidateHyperlinksAndMaybeKick(std::string const& str)
{
    if (Trinity::Hyperlinks::CheckAllLinks(str))
        return true;
 
    TC_LOG_ERROR("network", "Player {}{} sent a message with an invalid link:\n{}", GetPlayer()->GetName(),
        GetPlayer()->GetGUID().ToString(), str);
 
    if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_KICK))
        KickPlayer("WorldSession::ValidateHyperlinksAndMaybeKick Invalid chat link");
 
    return false;
}
 
bool WorldSession::DisallowHyperlinksAndMaybeKick(std::string const& str)
{
    if (str.find('|') == std::string::npos)
        return true;
 
    TC_LOG_ERROR("network", "Player {} {} sent a message which illegally contained a hyperlink:\n{}", GetPlayer()->GetName(),
                 GetPlayer()->GetGUID().ToString(), str);
 
    if (sWorld->getIntConfig(CONFIG_CHAT_STRICT_LINK_CHECKING_KICK))
        KickPlayer("WorldSession::DisallowHyperlinksAndMaybeKick Illegal chat link");
 
    return false;
}
 
void WorldSession::SendNotification(const char *format, ...)
{
    if (format)
    {
        va_list ap;
        char szStr[1024];
        szStr[0] = '\0';
        va_start(ap, format);
        vsnprintf(szStr, 1024, format, ap);
        va_end(ap);
 
        WorldPacket data(SMSG_NOTIFICATION, (strlen(szStr) + 1));
        data << szStr;
        SendPacket(&data);
    }
}
 
void WorldSession::SendNotification(uint32 string_id, ...)
{
    char const* format = GetTrinityString(string_id);
    if (format)
    {
        va_list ap;
        char szStr[1024];
        szStr[0] = '\0';
        va_start(ap, string_id);
        vsnprintf(szStr, 1024, format, ap);
        va_end(ap);
 
        WorldPacket data(SMSG_NOTIFICATION, (strlen(szStr) + 1));
        data << szStr;
        SendPacket(&data);
    }
}
 
bool WorldSession::CanSpeak() const
{
    return m_muteTime <= GameTime::GetGameTime();
}
 
char const* WorldSession::GetTrinityString(uint32 entry) const
{
    return sObjectMgr->GetTrinityString(entry, GetSessionDbLocaleIndex());
}
 
void WorldSession::ResetTimeOutTime(bool onlyActive)
{
    if (GetPlayer())
        m_timeOutTime = GameTime::GetGameTime() + time_t(sWorld->getIntConfig(CONFIG_SOCKET_TIMEOUTTIME_ACTIVE));
    else if (!onlyActive)
        m_timeOutTime = GameTime::GetGameTime() + time_t(sWorld->getIntConfig(CONFIG_SOCKET_TIMEOUTTIME));
}
 
bool WorldSession::IsConnectionIdle() const
{
    return m_timeOutTime < GameTime::GetGameTime() && !m_inQueue;
}
 
void WorldSession::Handle_NULL(WorldPacket& null)
{
    TC_LOG_ERROR("network.opcode", "Received unhandled opcode {} from {}", GetOpcodeNameForLogging(static_cast<OpcodeClient>(null.GetOpcode())), GetPlayerInfo());
}
 
void WorldSession::Handle_EarlyProccess(WorldPacket& recvPacket)
{
    TC_LOG_ERROR("network.opcode", "Received opcode {} that must be processed in WorldSocket::ReadDataHandler from {}"
        , GetOpcodeNameForLogging(static_cast<OpcodeClient>(recvPacket.GetOpcode())), GetPlayerInfo());
}
 
void WorldSession::Handle_ServerSide(WorldPacket& recvPacket)
{
    TC_LOG_ERROR("network.opcode", "Received server-side opcode {} from {}"
        , GetOpcodeNameForLogging(static_cast<OpcodeServer>(recvPacket.GetOpcode())), GetPlayerInfo());
}
 
void WorldSession::Handle_Deprecated(WorldPacket& recvPacket)
{
    TC_LOG_ERROR("network.opcode", "Received deprecated opcode {} from {}"
        , GetOpcodeNameForLogging(static_cast<OpcodeClient>(recvPacket.GetOpcode())), GetPlayerInfo());
}
 
void WorldSession::SendAuthWaitQueue(uint32 position)
{
    if (position == 0)
    {
        WorldPacket packet(SMSG_AUTH_RESPONSE, 1);
        packet << uint8(AUTH_OK);
        SendPacket(&packet);
    }
    else
    {
        WorldPacket packet(SMSG_AUTH_RESPONSE, 6);
        packet << uint8(AUTH_WAIT_QUEUE);
        packet << uint32(position);
        packet << uint8(0);                                 // unk
        SendPacket(&packet);
    }
}
 
void WorldSession::LoadAccountData(PreparedQueryResult result, uint32 mask)
{
    for (uint32 i = 0; i < NUM_ACCOUNT_DATA_TYPES; ++i)
        if (mask & (1 << i))
            m_accountData[i] = AccountData();
 
    if (!result)
        return;
 
    do
    {
        Field* fields = result->Fetch();
        uint32 type = fields[0].GetUInt8();
        if (type >= NUM_ACCOUNT_DATA_TYPES)
        {
            TC_LOG_ERROR("misc", "Table `{}` have invalid account data type ({}), ignore.",
                mask == GLOBAL_CACHE_MASK ? "account_data" : "character_account_data", type);
            continue;
        }
 
        if ((mask & (1 << type)) == 0)
        {
            TC_LOG_ERROR("misc", "Table `{}` have non appropriate for table account data type ({}), ignore.",
                mask == GLOBAL_CACHE_MASK ? "account_data" : "character_account_data", type);
            continue;
        }
 
        m_accountData[type].Time = time_t(fields[1].GetUInt32());
        m_accountData[type].Data = fields[2].GetString();
    }
    while (result->NextRow());
}
 
void WorldSession::SetAccountData(AccountDataType type, time_t tm, std::string const& data)
{
    uint32 id = 0;
    CharacterDatabaseStatements index;
    if ((1 << type) & GLOBAL_CACHE_MASK)
    {
        id = GetAccountId();
        index = CHAR_REP_ACCOUNT_DATA;
    }
    else
    {
        // _player can be NULL and packet received after logout but m_GUID still store correct guid
        if (!m_GUIDLow)
            return;
 
        id = m_GUIDLow;
        index = CHAR_REP_PLAYER_ACCOUNT_DATA;
    }
 
    CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(index);
    stmt->setUInt32(0, id);
    stmt->setUInt8 (1, type);
    stmt->setUInt32(2, uint32(tm));
    stmt->setString(3, data);
    CharacterDatabase.Execute(stmt);
 
    m_accountData[type].Time = tm;
    m_accountData[type].Data = data;
}
 
void WorldSession::SendAccountDataTimes(uint32 mask)
{
    WorldPacket data(SMSG_ACCOUNT_DATA_TIMES, 4 + 1 + 4 + NUM_ACCOUNT_DATA_TYPES * 4);
    data << uint32(GameTime::GetGameTime());                             // Server time
    data << uint8(1);
    data << uint32(mask);                                   // type mask
    for (uint32 i = 0; i < NUM_ACCOUNT_DATA_TYPES; ++i)
        if (mask & (1 << i))
            data << uint32(GetAccountData(AccountDataType(i))->Time);// also unix time
    SendPacket(&data);
}
 
void WorldSession::LoadTutorialsData(PreparedQueryResult result)
{
    memset(m_Tutorials, 0, sizeof(uint32) * MAX_ACCOUNT_TUTORIAL_VALUES);
 
    if (result)
    {
        for (uint8 i = 0; i < MAX_ACCOUNT_TUTORIAL_VALUES; ++i)
            m_Tutorials[i] = (*result)[i].GetUInt32();
        m_TutorialsChanged |= TUTORIALS_FLAG_LOADED_FROM_DB;
    }
 
    m_TutorialsChanged &= ~TUTORIALS_FLAG_CHANGED;
}
 
void WorldSession::SendTutorialsData()
{
    WorldPacket data(SMSG_TUTORIAL_FLAGS, 4 * MAX_ACCOUNT_TUTORIAL_VALUES);
    for (uint8 i = 0; i < MAX_ACCOUNT_TUTORIAL_VALUES; ++i)
        data << m_Tutorials[i];
    SendPacket(&data);
}
 
void WorldSession::SaveTutorialsData(CharacterDatabaseTransaction trans)
{
    if (!(m_TutorialsChanged & TUTORIALS_FLAG_CHANGED))
        return;
 
    bool const hasTutorialsInDB = (m_TutorialsChanged & TUTORIALS_FLAG_LOADED_FROM_DB) != 0;
    CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(hasTutorialsInDB ? CHAR_UPD_TUTORIALS : CHAR_INS_TUTORIALS);
    for (uint8 i = 0; i < MAX_ACCOUNT_TUTORIAL_VALUES; ++i)
        stmt->setUInt32(i, m_Tutorials[i]);
    stmt->setUInt32(MAX_ACCOUNT_TUTORIAL_VALUES, GetAccountId());
    trans->Append(stmt);
 
    // now has, set flag so next save uses update query
    if (!hasTutorialsInDB)
        m_TutorialsChanged |= TUTORIALS_FLAG_LOADED_FROM_DB;
 
    m_TutorialsChanged &= ~TUTORIALS_FLAG_CHANGED;
}
 
void WorldSession::LoadInstanceTimeRestrictions(PreparedQueryResult result)
{
    if (!result)
        return;
 
    SystemTimePoint now = GameTime::GetSystemTime();
    do
    {
        Field* fields = result->Fetch();
        SystemTimePoint restrictionExpireTime = SystemTimePoint::clock::from_time_t(fields[1].GetUInt64());
        if (restrictionExpireTime > now)
            _instanceResetTimes.try_emplace(fields[0].GetUInt32(), restrictionExpireTime);
    } while (result->NextRow());
}
 
void WorldSession::SaveInstanceTimeRestrictions(CharacterDatabaseTransaction trans)
{
    if (_instanceResetTimes.empty())
        return;
 
    CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_ACCOUNT_INSTANCE_LOCK_TIMES);
    stmt->setUInt32(0, GetAccountId());
    trans->Append(stmt);
 
    for (auto const& [instanceId, restrictionExpireTime] : _instanceResetTimes)
    {
        stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_ACCOUNT_INSTANCE_LOCK_TIMES);
        stmt->setUInt32(0, GetAccountId());
        stmt->setUInt32(1, instanceId);
        stmt->setUInt64(2, SystemTimePoint::clock::to_time_t(restrictionExpireTime));
        trans->Append(stmt);
    }
}
 
bool WorldSession::UpdateAndCheckInstanceCount(uint32 instanceId)
{
    UpdateInstanceEnterTimes();
 
    if (_instanceResetTimes.size() < sWorld->getIntConfig(CONFIG_MAX_INSTANCES_PER_HOUR))
        return true;
 
    if (instanceId == 0)
        return false;
 
    return _instanceResetTimes.contains(instanceId);
}
 
void WorldSession::AddInstanceEnterTime(uint32 instanceId, SystemTimePoint enterTime)
{
    _instanceResetTimes.try_emplace(instanceId, enterTime + 1h);
}
 
void WorldSession::UpdateInstanceEnterTimes()
{
    Trinity::Containers::EraseIf(_instanceResetTimes, [now = GameTime::GetSystemTime()](std::pair<uint32 const, SystemTimePoint> const& value)
    {
        return value.second < now;
    });
}
 
void WorldSession::ReadMovementInfo(WorldPacket &data, MovementInfo* mi)
{
    data >> *mi;
    if (mi->guid.IsEmpty())
    {
        TC_LOG_ERROR("entities.unit", "WorldSession::ReadMovementInfo: mi->guid is empty, opcode {}", static_cast<uint32>(data.GetOpcode()));
        return;
    }
 
    Unit* mover = ValidateAndGetUnitBeingMoved(mi->guid, true /*all remaining uses are ack handlers*/);
    ValidateMovementInfo(mover, mi);
}
 
void WorldSession::WriteMovementInfo(WorldPacket* data, MovementInfo* mi)
{
    *data << mi->guid.WriteAsPacked();
    *data << *mi;
}
 
void WorldSession::ReadAddonsInfo(ByteBuffer &data)
{
    if (data.rpos() + 4 > data.size())
        return;
 
    uint32 size;
    data >> size;
 
    if (!size)
        return;
 
    if (size > 0xFFFFF)
    {
        TC_LOG_DEBUG("addon", "WorldSession::ReadAddonsInfo: AddOnInfo too big, size {}", size);
        return;
    }
 
    uLongf uSize = size;
 
    uint32 pos = data.rpos();
 
    ByteBuffer addonInfo;
    addonInfo.resize(size);
 
    _addons.SecureAddons.clear();
 
    if (uncompress(addonInfo.contents(), &uSize, data.contents() + pos, data.size() - pos) == Z_OK)
    {
        try
        {
            _addons.SecureAddons.resize(std::min(addonInfo.read<uint32>(), Addons::MaxSecureAddons));
 
            for (SecureAddonInfo& addon : _addons.SecureAddons)
            {
                uint32 publicKeyCrc, urlCrc;
 
                addonInfo >> addon.Name >> addon.HasKey;
                addonInfo >> publicKeyCrc >> urlCrc;
 
                TC_LOG_DEBUG("addon", "AddOn: {} (CRC: 0x{:x}) - has key: 0x{:x} - URL CRC: 0x{:x}", addon.Name, publicKeyCrc, addon.HasKey, urlCrc);
 
                if (SavedAddon const* savedAddon = AddonMgr::GetAddonInfo(addon.Name))
                {
                    if (publicKeyCrc != savedAddon->CRC)
                    {
                        if (addon.HasKey)
                        {
                            addon.Status = SecureAddonInfo::BANNED;
                            TC_LOG_WARN("addon", " Addon: {}: modified (CRC: 0x{:x}) - accountID {})", addon.Name, savedAddon->CRC, GetAccountId());
                        }
                        else
                            addon.Status = SecureAddonInfo::SECURE_HIDDEN;
                    }
                    else
                    {
                        addon.Status = SecureAddonInfo::SECURE_HIDDEN;
                        TC_LOG_DEBUG("addon", "Addon: {}: validated (CRC: 0x{:x}) - accountID {}", addon.Name, savedAddon->CRC, GetAccountId());
                    }
                }
                else
                {
                    addon.Status = SecureAddonInfo::BANNED;
                    TC_LOG_WARN("addon", "Addon: {}: not registered as known secure addon - accountId {}", addon.Name, GetAccountId());
                }
            }
 
            addonInfo.rpos(addonInfo.size() - 4);
 
            addonInfo >> _addons.LastBannedAddOnTimestamp;
            TC_LOG_DEBUG("addon", "AddOn: Newest banned addon timestamp: {}", _addons.LastBannedAddOnTimestamp);
        }
        catch (ByteBufferException const& e)
        {
            TC_LOG_DEBUG("addon", "AddOn: Addon packet read error! {}", e.what());
        }
    }
    else
        TC_LOG_DEBUG("addon", "AddOn: Addon packet uncompress error!");
}
 
void WorldSession::SendAddonsInfo()
{
    // Send new uncached banned addons
    AddonMgr::BannedAddonList const* bannedAddons = AddonMgr::GetBannedAddons();
    uint32 lastBannedAddOnTimestamp = _addons.LastBannedAddOnTimestamp;
    if (!bannedAddons->empty() && bannedAddons->back().Timestamp < lastBannedAddOnTimestamp) // cheating attempt OR connecting to a realm with different configured banned addons, send everything
        lastBannedAddOnTimestamp = 0;
 
    auto itr = std::ranges::lower_bound(*bannedAddons, lastBannedAddOnTimestamp, std::ranges::less(), &BannedAddon::Timestamp);
 
    WorldPackets::ClientConfig::AddonInfo addonInfo;
    addonInfo.Addons = _addons.SecureAddons;
    addonInfo.BannedAddons = { itr, bannedAddons->end() };
    SendPacket(addonInfo.Write());
}
 
void WorldSession::SetPlayer(Player* player)
{
    _player = player;
 
    // set m_GUID that can be used while player loggined and later until m_playerRecentlyLogout not reset
    if (_player)
        m_GUIDLow = _player->GetGUID().GetCounter();
}
 
void WorldSession::ProcessQueryCallbacks()
{
    _queryProcessor.ProcessReadyCallbacks();
    _transactionCallbacks.ProcessReadyCallbacks();
    _queryHolderProcessor.ProcessReadyCallbacks();
}
 
TransactionCallback& WorldSession::AddTransactionCallback(TransactionCallback&& callback)
{
    return _transactionCallbacks.AddCallback(std::move(callback));
}
 
SQLQueryHolderCallback& WorldSession::AddQueryHolderCallback(SQLQueryHolderCallback&& callback)
{
    return _queryHolderProcessor.AddCallback(std::move(callback));
}
 
void WorldSession::InitWarden(SessionKey const& k, std::string const& os)
{
    if (os == "Win")
    {
        _warden = std::make_unique<WardenWin>();
        _warden->Init(this, k);
    }
    else if (os == "OSX")
    {
        // Disabled as it is causing the client to crash
        // _warden = std::make_unique<WardenMac>();
        // _warden->Init(this, k);
    }
}
 
void WorldSession::LoadPermissions()
{
    uint32 id = GetAccountId();
    uint8 secLevel = GetSecurity();
 
    _RBACData = new rbac::RBACData(id, _accountName, realm.Id.Realm, secLevel);
    _RBACData->LoadFromDB();
}
 
QueryCallback WorldSession::LoadPermissionsAsync()
{
    uint32 id = GetAccountId();
    uint8 secLevel = GetSecurity();
 
    TC_LOG_DEBUG("rbac", "WorldSession::LoadPermissions [AccountId: {}, Name: {}, realmId: {}, secLevel: {}]",
        id, _accountName, realm.Id.Realm, secLevel);
 
    _RBACData = new rbac::RBACData(id, _accountName, realm.Id.Realm, secLevel);
    return _RBACData->LoadFromDBAsync();
}
 
class AccountInfoQueryHolderPerRealm : public CharacterDatabaseQueryHolder
{
public:
    enum
    {
        GLOBAL_ACCOUNT_DATA = 0,
        TUTORIALS,
        INSTANCE_TIMES,
 
        MAX_QUERIES
    };
 
    AccountInfoQueryHolderPerRealm() { SetSize(MAX_QUERIES); }
 
    bool Initialize(uint32 accountId)
    {
        bool ok = true;
 
        CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_ACCOUNT_DATA);
        stmt->setUInt32(0, accountId);
        ok = SetPreparedQuery(GLOBAL_ACCOUNT_DATA, stmt) && ok;
 
        stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_TUTORIALS);
        stmt->setUInt32(0, accountId);
        ok = SetPreparedQuery(TUTORIALS, stmt) && ok;
 
        stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_ACCOUNT_INSTANCELOCKTIMES);
        stmt->setUInt32(0, accountId);
        ok = SetPreparedQuery(INSTANCE_TIMES, stmt) && ok;
 
        return ok;
    }
};
 
void WorldSession::InitializeSession()
{
    std::shared_ptr<AccountInfoQueryHolderPerRealm> realmHolder = std::make_shared<AccountInfoQueryHolderPerRealm>();
    if (!realmHolder->Initialize(GetAccountId()))
    {
        SendAuthResponse(AUTH_SYSTEM_ERROR, false);
        return;
    }
 
    AddQueryHolderCallback(CharacterDatabase.DelayQueryHolder(realmHolder)).AfterComplete([this](SQLQueryHolderBase const& holder)
    {
        InitializeSessionCallback(static_cast<AccountInfoQueryHolderPerRealm const&>(holder));
    });
}
 
void WorldSession::InitializeSessionCallback(CharacterDatabaseQueryHolder const& realmHolder)
{
    LoadAccountData(realmHolder.GetPreparedResult(AccountInfoQueryHolderPerRealm::GLOBAL_ACCOUNT_DATA), GLOBAL_CACHE_MASK);
    LoadTutorialsData(realmHolder.GetPreparedResult(AccountInfoQueryHolderPerRealm::TUTORIALS));
    LoadInstanceTimeRestrictions(realmHolder.GetPreparedResult(AccountInfoQueryHolderPerRealm::INSTANCE_TIMES));
 
    if (!m_inQueue)
        SendAuthResponse(AUTH_OK, true);
    else
        SendAuthWaitQueue(0);
 
    SetInQueue(false);
    ResetTimeOutTime(false);
 
    SendAddonsInfo();
    SendClientCacheVersion(sWorld->getIntConfig(CONFIG_CLIENTCACHE_VERSION));
    SendTutorialsData();
}
 
rbac::RBACData* WorldSession::GetRBACData() const
{
    return _RBACData;
}
 
bool WorldSession::HasPermission(uint32 permission)
{
    if (!_RBACData)
        LoadPermissions();
 
    bool hasPermission = _RBACData->HasPermission(permission);
    TC_LOG_DEBUG("rbac", "WorldSession::HasPermission [AccountId: {}, Name: {}, realmId: {}]",
                   _RBACData->GetId(), _RBACData->GetName(), realm.Id.Realm);
 
    return hasPermission;
}
 
void WorldSession::InvalidateRBACData()
{
    TC_LOG_DEBUG("rbac", "WorldSession::Invalidaterbac::RBACData [AccountId: {}, Name: {}, realmId: {}]",
                   _RBACData->GetId(), _RBACData->GetName(), realm.Id.Realm);
    delete _RBACData;
    _RBACData = nullptr;
}
 
bool WorldSession::DosProtection::EvaluateOpcode(WorldPacket& p, time_t time) const
{
    uint32 maxPacketCounterAllowed = GetMaxPacketCounterAllowed(p.GetOpcode());
 
    // Return true if there no limit for the opcode
    if (!maxPacketCounterAllowed)
        return true;
 
    PacketCounter& packetCounter = _PacketThrottlingMap[p.GetOpcode()];
    if (packetCounter.lastReceiveTime != time)
    {
        packetCounter.lastReceiveTime = time;
        packetCounter.amountCounter = 0;
    }
 
    // Check if player is flooding some packets
    if (++packetCounter.amountCounter <= maxPacketCounterAllowed)
        return true;
 
    TC_LOG_WARN("network", "AntiDOS: Account {}, IP: {}, Ping: {}, Character: {}, flooding packet (opc: {} (0x{:X}), count: {})",
        Session->GetAccountId(), Session->GetRemoteAddress(), Session->GetLatency(), Session->GetPlayerName(),
        opcodeTable[static_cast<OpcodeClient>(p.GetOpcode())]->Name, p.GetOpcode(), packetCounter.amountCounter);
 
    switch (_policy)
    {
        case POLICY_LOG:
            return true;
        case POLICY_KICK:
        {
            TC_LOG_WARN("network", "AntiDOS: Player kicked!");
            Session->KickPlayer("WorldSession::DosProtection::EvaluateOpcode AntiDOS");
            return false;
        }
        case POLICY_BAN:
        {
            BanMode bm = (BanMode)sWorld->getIntConfig(CONFIG_PACKET_SPOOF_BANMODE);
            uint32 duration = sWorld->getIntConfig(CONFIG_PACKET_SPOOF_BANDURATION); // in seconds
            std::string nameOrIp = "";
            switch (bm)
            {
                case BAN_CHARACTER: // not supported, ban account
                case BAN_ACCOUNT: (void)sAccountMgr->GetName(Session->GetAccountId(), nameOrIp); break;
                case BAN_IP: nameOrIp = Session->GetRemoteAddress(); break;
            }
            sWorld->BanAccount(bm, nameOrIp, duration, "DOS (Packet Flooding/Spoofing", "Server: AutoDOS");
            TC_LOG_WARN("network", "AntiDOS: Player automatically banned for {} seconds.", duration);
            Session->KickPlayer("WorldSession::DosProtection::EvaluateOpcode AntiDOS");
            return false;
        }
        default: // invalid policy
            return true;
    }
}
 
uint32 WorldSession::DosProtection::GetMaxPacketCounterAllowed(uint16 opcode) const
{
    uint32 maxPacketCounterAllowed;
    switch (opcode)
    {
        // CPU usage sending 2000 packets/second on a 3.70 GHz 4 cores on Win x64
        //                                              [% CPU mysqld]   [%CPU worldserver RelWithDebInfo]
        case CMSG_PLAYER_LOGIN:                         //   0               0.5
        case CMSG_NAME_QUERY:                           //   0               1
        case CMSG_PET_NAME_QUERY:                       //   0               1
        case CMSG_NPC_TEXT_QUERY:                       //   0               1
        case CMSG_ATTACK_STOP:                          //   0               1
        case CMSG_QUERY_QUESTS_COMPLETED:               //   0               1
        case CMSG_QUERY_TIME:                           //   0               1
        case CMSG_CORPSE_MAP_POSITION_QUERY:            //   0               1
        case CMSG_MOVE_TIME_SKIPPED:                    //   0               1
        case MSG_QUERY_NEXT_MAIL_TIME:                  //   0               1
        case CMSG_SET_SHEATHED:                         //   0               1
        case MSG_RAID_TARGET_UPDATE:                    //   0               1
        case CMSG_PLAYER_LOGOUT:                        //   0               1
        case CMSG_LOGOUT_REQUEST:                       //   0               1
        case CMSG_PET_RENAME:                           //   0               1
        case CMSG_QUESTGIVER_CANCEL:                    //   0               1
        case CMSG_QUESTGIVER_REQUEST_REWARD:            //   0               1
        case CMSG_COMPLETE_CINEMATIC:                   //   0               1
        case CMSG_BANKER_ACTIVATE:                      //   0               1
        case CMSG_BUY_BANK_SLOT:                        //   0               1
        case CMSG_OPT_OUT_OF_LOOT:                      //   0               1
        case CMSG_DUEL_ACCEPTED:                        //   0               1
        case CMSG_DUEL_CANCELLED:                       //   0               1
        case CMSG_CALENDAR_COMPLAIN:                    //   0               1
        case CMSG_QUEST_QUERY:                          //   0               1.5
        case CMSG_ITEM_QUERY_SINGLE:                    //   0               1.5
        case CMSG_ITEM_NAME_QUERY:                      //   0               1.5
        case CMSG_GAMEOBJECT_QUERY:                     //   0               1.5
        case CMSG_CREATURE_QUERY:                       //   0               1.5
        case CMSG_QUESTGIVER_STATUS_QUERY:              //   0               1.5
        case CMSG_GUILD_QUERY:                          //   0               1.5
        case CMSG_ARENA_TEAM_QUERY:                     //   0               1.5
        case CMSG_TAXINODE_STATUS_QUERY:                //   0               1.5
        case CMSG_TAXIQUERYAVAILABLENODES:              //   0               1.5
        case CMSG_QUESTGIVER_QUERY_QUEST:               //   0               1.5
        case CMSG_PAGE_TEXT_QUERY:                      //   0               1.5
        case MSG_QUERY_GUILD_BANK_TEXT:                 //   0               1.5
        case MSG_CORPSE_QUERY:                          //   0               1.5
        case MSG_MOVE_SET_FACING:                       //   0               1.5
        case CMSG_REQUEST_PARTY_MEMBER_STATS:           //   0               1.5
        case CMSG_QUESTGIVER_COMPLETE_QUEST:            //   0               1.5
        case CMSG_SET_ACTION_BUTTON:                    //   0               1.5
        case CMSG_RESET_INSTANCES:                      //   0               1.5
        case CMSG_HEARTH_AND_RESURRECT:                 //   0               1.5
        case CMSG_TOGGLE_PVP:                           //   0               1.5
        case CMSG_PET_ABANDON:                          //   0               1.5
        case CMSG_ACTIVATETAXIEXPRESS:                  //   0               1.5
        case CMSG_ACTIVATETAXI:                         //   0               1.5
        case CMSG_SELF_RES:                             //   0               1.5
        case CMSG_UNLEARN_SKILL:                        //   0               1.5
        case CMSG_EQUIPMENT_SET_SAVE:                   //   0               1.5
        case CMSG_DELETEEQUIPMENT_SET:                  //   0               1.5
        case CMSG_DISMISS_CRITTER:                      //   0               1.5
        case CMSG_REPOP_REQUEST:                        //   0               1.5
        case CMSG_GROUP_INVITE:                         //   0               1.5
        case CMSG_GROUP_DECLINE:                        //   0               1.5
        case CMSG_GROUP_ACCEPT:                         //   0               1.5
        case CMSG_GROUP_UNINVITE_GUID:                  //   0               1.5
        case CMSG_GROUP_UNINVITE:                       //   0               1.5
        case CMSG_GROUP_DISBAND:                        //   0               1.5
        case CMSG_BATTLEMASTER_JOIN_ARENA:              //   0               1.5
        case CMSG_LEAVE_BATTLEFIELD:                    //   0               1.5
        case MSG_GUILD_BANK_LOG_QUERY:                  //   0               2
        case CMSG_LOGOUT_CANCEL:                        //   0               2
        case CMSG_REALM_SPLIT:                          //   0               2
        case CMSG_ALTER_APPEARANCE:                     //   0               2
        case CMSG_QUEST_CONFIRM_ACCEPT:                 //   0               2
        case MSG_GUILD_EVENT_LOG_QUERY:                 //   0               2.5
        case CMSG_READY_FOR_ACCOUNT_DATA_TIMES:         //   0               2.5
        case CMSG_QUESTGIVER_STATUS_MULTIPLE_QUERY:     //   0               2.5
        case CMSG_BEGIN_TRADE:                          //   0               2.5
        case CMSG_INITIATE_TRADE:                       //   0               3
        case CMSG_MESSAGECHAT:                          //   0               3.5
        case CMSG_INSPECT:                              //   0               3.5
        case CMSG_AREA_SPIRIT_HEALER_QUERY:             // not profiled
        case CMSG_STANDSTATECHANGE:                     // not profiled
        case MSG_RANDOM_ROLL:                           // not profiled
        case CMSG_TIME_SYNC_RESP:                       // not profiled
        case CMSG_TRAINER_BUY_SPELL:                    // not profiled
        case CMSG_FORCE_RUN_SPEED_CHANGE_ACK:           // not profiled
        case CMSG_FORCE_SWIM_SPEED_CHANGE_ACK:          // not profiled
        case CMSG_FORCE_SWIM_BACK_SPEED_CHANGE_ACK:     // not profiled
        case CMSG_FORCE_RUN_BACK_SPEED_CHANGE_ACK:      // not profiled
        case CMSG_FORCE_FLIGHT_SPEED_CHANGE_ACK:        // not profiled
        case CMSG_FORCE_FLIGHT_BACK_SPEED_CHANGE_ACK:   // not profiled
        case CMSG_FORCE_WALK_SPEED_CHANGE_ACK:          // not profiled
        case CMSG_FORCE_TURN_RATE_CHANGE_ACK:           // not profiled
        case CMSG_FORCE_PITCH_RATE_CHANGE_ACK:          // not profiled
        {
            // "0" is a magic number meaning there's no limit for the opcode.
            // All the opcodes above must cause little CPU usage and no sync/async database queries at all
            maxPacketCounterAllowed = 0;
            break;
        }
 
        case CMSG_QUESTGIVER_ACCEPT_QUEST:              //   0               4
        case CMSG_QUESTLOG_REMOVE_QUEST:                //   0               4
        case CMSG_QUESTGIVER_CHOOSE_REWARD:             //   0               4
        case CMSG_CONTACT_LIST:                         //   0               5
        case CMSG_LEARN_PREVIEW_TALENTS:                //   0               6
        case CMSG_AUTOBANK_ITEM:                        //   0               6
        case CMSG_AUTOSTORE_BANK_ITEM:                  //   0               6
        case CMSG_WHO:                                  //   0               7
        case CMSG_PLAYER_VEHICLE_ENTER:                 //   0               8
        case CMSG_LEARN_PREVIEW_TALENTS_PET:            // not profiled
        case MSG_MOVE_HEARTBEAT:
        {
            maxPacketCounterAllowed = 200;
            break;
        }
 
        case CMSG_GUILD_SET_PUBLIC_NOTE:                //   1               2         1 async db query
        case CMSG_GUILD_SET_OFFICER_NOTE:               //   1               2         1 async db query
        case CMSG_SET_CONTACT_NOTES:                    //   1               2.5       1 async db query
        case CMSG_CALENDAR_GET_CALENDAR:                //   0               1.5       medium upload bandwidth usage
        case CMSG_GUILD_BANK_QUERY_TAB:                 //   0               3.5       medium upload bandwidth usage
        case CMSG_QUERY_INSPECT_ACHIEVEMENTS:           //   0              13         high upload bandwidth usage
        case CMSG_GAMEOBJ_REPORT_USE:                   // not profiled
        case CMSG_GAMEOBJ_USE:                          // not profiled
        case MSG_PETITION_DECLINE:                      // not profiled
        {
            maxPacketCounterAllowed = 50;
            break;
        }
 
        case CMSG_QUEST_POI_QUERY:                      //   0              25         very high upload bandwidth usage
        {
            maxPacketCounterAllowed = MAX_QUEST_LOG_SIZE;
            break;
        }
 
        case CMSG_GM_REPORT_LAG:                        //   1               3         1 async db query
        case CMSG_SPELLCLICK:                           // not profiled
        case CMSG_REMOVE_GLYPH:                         // not profiled
        case CMSG_DISMISS_CONTROLLED_VEHICLE:           // not profiled
        {
            maxPacketCounterAllowed = 20;
            break;
        }
 
        case CMSG_PETITION_SIGN:                        //   9               4         2 sync 1 async db queries
        case CMSG_TURN_IN_PETITION:                     //   8               5.5       2 sync db query
        case CMSG_GROUP_CHANGE_SUB_GROUP:               //   6               5         1 sync 1 async db queries
        case CMSG_PETITION_QUERY:                       //   4               3.5       1 sync db query
        case CMSG_CHAR_RACE_CHANGE:                     //   5               4         1 sync db query
        case CMSG_CHAR_CUSTOMIZE:                       //   5               5         1 sync db query
        case CMSG_CHAR_FACTION_CHANGE:                  //   5               5         1 sync db query
        case CMSG_CHAR_DELETE:                          //   4               4         1 sync db query
        case CMSG_DEL_FRIEND:                           //   7               5         1 async db query
        case CMSG_ADD_FRIEND:                           //   6               4         1 async db query
        case CMSG_CHAR_RENAME:                          //   5               3         1 async db query
        case CMSG_GMSURVEY_SUBMIT:                      //   2               3         1 async db query
        case CMSG_BUG:                                  //   1               1         1 async db query
        case CMSG_GROUP_SET_LEADER:                     //   1               2         1 async db query
        case CMSG_GROUP_RAID_CONVERT:                   //   1               5         1 async db query
        case CMSG_GROUP_ASSISTANT_LEADER:               //   1               2         1 async db query
        case CMSG_PETITION_BUY:                         // not profiled                1 sync 1 async db queries
        case CMSG_CHANGE_SEATS_ON_CONTROLLED_VEHICLE:   // not profiled
        case CMSG_REQUEST_VEHICLE_PREV_SEAT:            // not profiled
        case CMSG_REQUEST_VEHICLE_NEXT_SEAT:            // not profiled
        case CMSG_REQUEST_VEHICLE_SWITCH_SEAT:          // not profiled
        case CMSG_REQUEST_VEHICLE_EXIT:                 // not profiled
        case CMSG_CONTROLLER_EJECT_PASSENGER:           // not profiled
        case CMSG_ITEM_REFUND:                          // not profiled
        case CMSG_SOCKET_GEMS:                          // not profiled
        case CMSG_WRAP_ITEM:                            // not profiled
        case CMSG_REPORT_PVP_AFK:                       // not profiled
        {
            maxPacketCounterAllowed = 10;
            break;
        }
 
        case CMSG_CHAR_CREATE:                          //   7               5         3 async db queries
        case CMSG_CHAR_ENUM:                            //  22               3         2 async db queries
        case CMSG_GMTICKET_CREATE:                      //   1              25         1 async db query
        case CMSG_GMTICKET_UPDATETEXT:                  //   0              15         1 async db query
        case CMSG_GMTICKET_DELETETICKET:                //   1              25         1 async db query
        case CMSG_GMRESPONSE_RESOLVE:                   //   1              25         1 async db query
        case CMSG_CALENDAR_ADD_EVENT:                   //  21              10         2 async db query
        case CMSG_CALENDAR_UPDATE_EVENT:                // not profiled
        case CMSG_CALENDAR_REMOVE_EVENT:                // not profiled
        case CMSG_CALENDAR_COPY_EVENT:                  // not profiled
        case CMSG_CALENDAR_EVENT_INVITE:                // not profiled
        case CMSG_CALENDAR_EVENT_SIGNUP:                // not profiled
        case CMSG_CALENDAR_EVENT_RSVP:                  // not profiled
        case CMSG_CALENDAR_EVENT_REMOVE_INVITE:         // not profiled
        case CMSG_CALENDAR_EVENT_MODERATOR_STATUS:      // not profiled
        case CMSG_ARENA_TEAM_INVITE:                    // not profiled
        case CMSG_ARENA_TEAM_ACCEPT:                    // not profiled
        case CMSG_ARENA_TEAM_DECLINE:                   // not profiled
        case CMSG_ARENA_TEAM_LEAVE:                     // not profiled
        case CMSG_ARENA_TEAM_DISBAND:                   // not profiled
        case CMSG_ARENA_TEAM_REMOVE:                    // not profiled
        case CMSG_ARENA_TEAM_LEADER:                    // not profiled
        case CMSG_LOOT_METHOD:                          // not profiled
        case CMSG_GUILD_INVITE:                         // not profiled
        case CMSG_GUILD_ACCEPT:                         // not profiled
        case CMSG_GUILD_DECLINE:                        // not profiled
        case CMSG_GUILD_LEAVE:                          // not profiled
        case CMSG_GUILD_DISBAND:                        // not profiled
        case CMSG_GUILD_LEADER:                         // not profiled
        case CMSG_GUILD_MOTD:                           // not profiled
        case CMSG_GUILD_RANK:                           // not profiled
        case CMSG_GUILD_ADD_RANK:                       // not profiled
        case CMSG_GUILD_DEL_RANK:                       // not profiled
        case CMSG_GUILD_INFO_TEXT:                      // not profiled
        case CMSG_GUILD_BANK_DEPOSIT_MONEY:             // not profiled
        case CMSG_GUILD_BANK_WITHDRAW_MONEY:            // not profiled
        case CMSG_GUILD_BANK_BUY_TAB:                   // not profiled
        case CMSG_GUILD_BANK_UPDATE_TAB:                // not profiled
        case CMSG_SET_GUILD_BANK_TEXT:                  // not profiled
        case MSG_SAVE_GUILD_EMBLEM:                     // not profiled
        case MSG_PETITION_RENAME:                       // not profiled
        case MSG_TALENT_WIPE_CONFIRM:                   // not profiled
        case MSG_SET_DUNGEON_DIFFICULTY:                // not profiled
        case MSG_SET_RAID_DIFFICULTY:                   // not profiled
        case MSG_PARTY_ASSIGNMENT:                      // not profiled
        case MSG_RAID_READY_CHECK:                      // not profiled
        {
            maxPacketCounterAllowed = 3;
            break;
        }
 
        case CMSG_ITEM_REFUND_INFO:                     // not profiled
        {
            maxPacketCounterAllowed = PLAYER_SLOTS_COUNT;
            break;
        }
        default:
        {
            maxPacketCounterAllowed = 100;
            break;
        }
    }
 
    return maxPacketCounterAllowed;
}
 
WorldSession::DosProtection::DosProtection(WorldSession* s) : Session(s), _policy((Policy)sWorld->getIntConfig(CONFIG_PACKET_SPOOF_POLICY))
{
}
 
void WorldSession::ResetTimeSync()
{
    _timeSyncNextCounter = 0;
    _pendingTimeSyncRequests.clear();
}
 
void WorldSession::SendTimeSync()
{
    WorldPacket data(SMSG_TIME_SYNC_REQ, 4);
    data << uint32(_timeSyncNextCounter);
    SendPacket(&data);
 
    _pendingTimeSyncRequests[_timeSyncNextCounter] = getMSTime();
 
    // Schedule next sync in 10 sec (except for the 2 first packets, which are spaced by only 5s)
    _timeSyncTimer = _timeSyncNextCounter == 0 ? 5000 : 10000;
    _timeSyncNextCounter++;
}