server.h

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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com.                */
#ifndef ENGINE_SERVER_SERVER_H
#define ENGINE_SERVER_SERVER_H
 
#include "antibot.h"
#include "authmanager.h"
#include "name_ban.h"
#include "snap_id_pool.h"
 
#include <base/hash.h>
 
#include <engine/console.h>
#include <engine/server.h>
#include <engine/shared/demo.h>
#include <engine/shared/econ.h>
#include <engine/shared/fifo.h>
#include <engine/shared/netban.h>
#include <engine/shared/network.h>
#include <engine/shared/protocol.h>
#include <engine/shared/snapshot.h>
#include <engine/shared/uuid_manager.h>
 
#include <memory>
#include <optional>
#include <vector>
 
#if defined(CONF_UPNP)
#include "upnp.h"
#endif
 
class CConfig;
class CHostLookup;
class CLogMessage;
class CMsgPacker;
class CPacker;
class IEngine;
class IEngineHttp;
class ILogger;
 
class CServerBan : public CNetBan
{
    class CServer *m_pServer;
 
    template<class T>
    int BanExt(T *pBanPool, const typename T::CDataType *pData, int Seconds, const char *pReason, bool VerbatimReason);
 
public:
    class CServer *Server() const { return m_pServer; }
 
    void InitServerBan(class IConsole *pConsole, class IStorage *pStorage, class CServer *pServer);
 
    int BanAddr(const NETADDR *pAddr, int Seconds, const char *pReason, bool VerbatimReason) override;
    int BanRange(const CNetRange *pRange, int Seconds, const char *pReason) override;
 
    static void ConBanExt(class IConsole::IResult *pResult, void *pUser);
    static void ConBanRegion(class IConsole::IResult *pResult, void *pUser);
    static void ConBanRegionRange(class IConsole::IResult *pResult, void *pUser);
};
 
class CServer : public IServer
{
    friend class CServerLogger;
 
    class IGameServer *m_pGameServer;
    class CConfig *m_pConfig;
    class IConsole *m_pConsole;
    IEngineHttp *m_pHttp;
    class IStorage *m_pStorage;
    class IEngineAntibot *m_pAntibot;
    class IRegister *m_pRegister;
    IEngine *m_pEngine;
 
#if defined(CONF_UPNP)
    CUPnP m_UPnP;
#endif
 
#if defined(CONF_FAMILY_UNIX)
    UNIXSOCKETADDR m_ConnLoggingDestAddr;
    bool m_ConnLoggingSocketCreated;
    UNIXSOCKET m_ConnLoggingSocket;
#endif
 
    class CDbConnectionPool *m_pConnectionPool;
 
    int m_PreviousDebugDummies = 0;
 
public:
    class IGameServer *GameServer() { return m_pGameServer; }
    class CConfig *Config() { return m_pConfig; }
    const CConfig *Config() const { return m_pConfig; }
    class IConsole *Console() { return m_pConsole; }
    class IStorage *Storage() { return m_pStorage; }
    class IEngineAntibot *Antibot() { return m_pAntibot; }
    class CDbConnectionPool *DbPool() { return m_pConnectionPool; }
    IEngine *Engine() { return m_pEngine; }
 
    enum
    {
        MAX_RCONCMD_SEND = 16,
    };
 
    enum class EDnsblState
    {
        NONE,
        PENDING,
        BLACKLISTED,
        WHITELISTED,
    };
 
    static const char *DnsblStateStr(EDnsblState State);
 
    class CClient
    {
    public:
        enum
        {
            STATE_REDIRECTED = -1,
            STATE_EMPTY,
            STATE_PREAUTH,
            STATE_AUTH,
            STATE_CONNECTING,
            STATE_READY,
            STATE_INGAME,
        };
 
        enum
        {
            SNAPRATE_INIT = 0,
            SNAPRATE_FULL,
            SNAPRATE_RECOVER,
        };
 
        class CInput
        {
        public:
            int m_aData[MAX_INPUT_SIZE];
            int m_GameTick; // the tick that was chosen for the input
        };
 
        // connection state info
        int m_State;
        int m_Latency;
        int m_SnapRate;
 
        // Rejoining session while a game slot exists already
        bool m_IngameBeforeRejoin;
        bool IsKnownToGame() const { return m_State == STATE_INGAME || m_IngameBeforeRejoin; }
 
        double m_Traffic;
        int64_t m_TrafficSince;
 
        int m_LastAckedSnapshot;
        int m_LastInputTick;
        CSnapshotStorage m_Snapshots;
 
        CNetMsg_Sv_PreInput m_LastPreInput = {};
        CInput m_LatestInput;
        CInput m_aInputs[200]; // TODO: handle input better
        int m_CurrentInput;
 
        char m_aName[MAX_NAME_LENGTH];
        char m_aClan[MAX_CLAN_LENGTH];
        int m_Country;
        std::optional<int> m_Score;
        int m_AuthKey;
        int m_AuthTries;
        bool m_AuthHidden;
        int m_NextMapChunk;
        // map data chunks sent since the last map change
        int m_NumMapChunks;
        // per-tick preinput budget
        int m_PreInputsTick;
        int m_NumPreInputs;
        int m_Flags;
        bool m_ShowIps;
        bool m_DebugDummy;
        bool m_ForceHighBandwidthOnSpectate;
        NETADDR m_DebugDummyAddr;
        std::array<char, NETADDR_MAXSTRSIZE> m_aDebugDummyAddrString;
        std::array<char, NETADDR_MAXSTRSIZE> m_aDebugDummyAddrStringNoPort;
 
        const IConsole::ICommandInfo *m_pRconCmdToSend;
        enum
        {
            MAPLIST_UNINITIALIZED = -1,
            MAPLIST_DISABLED = -2,
            MAPLIST_DONE = -3,
        };
        int m_MaplistEntryToSend;
 
        bool m_HasPersistentData;
        void *m_pPersistentData;
 
        void Reset();
 
        // DDRace
 
        bool m_GotDDNetVersionPacket;
        bool m_DDNetVersionSettled;
        int m_DDNetVersion;
        char m_aDDNetVersionStr[64];
        CUuid m_ConnectionId;
        int64_t m_RedirectDropTime;
 
        int m_aIdMap[LEGACY_MAX_CLIENTS];
        int m_aReverseIdMap[MAX_CLIENTS];
 
        // DNSBL
        EDnsblState m_DnsblState;
        std::shared_ptr<CHostLookup> m_pDnsblLookup;
 
        bool m_Sixup;
 
        bool IncludedInServerInfo() const
        {
            return m_State != STATE_EMPTY && !m_DebugDummy;
        }
    };
 
    IConsole::EAccessLevel ConsoleAccessLevel(int ClientId) const;
 
    CClient m_aClients[MAX_CLIENTS];
 
    CSnapshotDelta m_SnapshotDelta;
    CSnapshotDelta m_SnapshotDeltaSixup;
    CSnapshotBuilder m_SnapshotBuilder;
    CSnapIdPool m_IdPool;
    CNetServer m_NetServer;
    CEcon m_Econ;
    CFifo m_Fifo;
    CServerBan m_ServerBan;
 
    int64_t m_GameStartTime;
 
    enum
    {
        UNINITIALIZED = 0,
        RUNNING = 1,
        STOPPING = 2
    };
 
    int m_RunServer;
 
    bool m_MapReload;
    bool m_SameMapReload;
    bool m_ReloadedWhenEmpty;
 
    // client id of the user currently executing a rcon command
    // can also be -1 (RCON_CID_SERV) or -2 (RCON_CID_VOTE)
    int m_RconClientId;
    int m_RconAuthLevel;
    int m_PrintCBIndex;
    char m_aShutdownReason[128];
    void *m_pPersistentData;
 
    enum
    {
        MAP_TYPE_SIX = 0,
        MAP_TYPE_SIXUP,
        NUM_MAP_TYPES
    };
 
    enum
    {
        RECORDER_MANUAL = MAX_CLIENTS,
        RECORDER_AUTO = MAX_CLIENTS + 1,
        NUM_RECORDERS = MAX_CLIENTS + 2,
    };
 
    SHA256_DIGEST m_aCurrentMapSha256[NUM_MAP_TYPES];
    unsigned m_aCurrentMapCrc[NUM_MAP_TYPES];
    unsigned char *m_apCurrentMapData[NUM_MAP_TYPES];
    unsigned int m_aCurrentMapSize[NUM_MAP_TYPES];
    char m_aMapDownloadUrl[256];
 
    CDemoRecorder m_aDemoRecorder[NUM_RECORDERS];
    CAuthManager m_AuthManager;
 
    // start of the second the connection-less server info responses are counted in
    int64_t m_ServerInfoFirstRequest;
    int m_ServerInfoNumRequests;
 
    char m_aErrorShutdownReason[128];
 
    CNameBans m_NameBans;
 
    size_t m_AnnouncementLastLine;
    std::vector<std::string> m_vAnnouncements;
 
    std::shared_ptr<ILogger> m_pFileLogger = nullptr;
    std::shared_ptr<ILogger> m_pStdoutLogger = nullptr;
 
    CServer();
    ~CServer() override;
 
    bool IsClientNameAvailable(int ClientId, const char *pNameRequest);
    bool SetClientNameImpl(int ClientId, const char *pNameRequest, bool Set);
    bool SetClientClanImpl(int ClientId, const char *pClanRequest, bool Set);
 
    bool WouldClientNameChange(int ClientId, const char *pNameRequest) override;
    bool WouldClientClanChange(int ClientId, const char *pClanRequest) override;
    void SetClientName(int ClientId, const char *pName) override;
    void SetClientClan(int ClientId, const char *pClan) override;
    void SetClientCountry(int ClientId, int Country) override;
    void SetClientScore(int ClientId, std::optional<int> Score) override;
    void SetClientFlags(int ClientId, int Flags) override;
 
    void Kick(int ClientId, const char *pReason) override;
    void Ban(int ClientId, int Seconds, const char *pReason, bool VerbatimReason) override;
    void ReconnectClient(int ClientId);
    void RedirectClient(int ClientId, int Port) override;
 
    void DemoRecorder_HandleAutoStart() override;
 
    int64_t TickStartTime(int Tick);
 
    int Init();
 
    static bool StrHideIps(const char *pInput, char *pOutputWithIps, size_t OutputWithIpsSize, char *pOutputWithoutIps, size_t OutputWithoutIpsSize);
    void SendLogLine(const CLogMessage *pMessage);
    void SetRconCid(int ClientId) override;
    int GetAuthedState(int ClientId) const override;
    bool IsRconAuthed(int ClientId) const override;
    bool IsRconAuthedAdmin(int ClientId) const override;
    const char *GetAuthName(int ClientId) const override;
    bool HasAuthHidden(int ClientId) const override;
    bool GetClientInfo(int ClientId, CClientInfo *pInfo) const override;
    void SetClientDDNetVersion(int ClientId, int DDNetVersion) override;
    const NETADDR *ClientAddr(int ClientId) const override;
    const std::array<char, NETADDR_MAXSTRSIZE> &ClientAddrStringImpl(int ClientId, bool IncludePort) const override;
    const char *ClientName(int ClientId) const override;
    const char *ClientClan(int ClientId) const override;
    int ClientCountry(int ClientId) const override;
    bool ClientSlotEmpty(int ClientId) const override;
    bool ClientIngame(int ClientId) const override;
    int Port() const override;
    int MaxClients() const override;
    int ClientCount() const override;
    int DistinctClientCount() const override;
 
    int GetClientVersion(int ClientId) const override;
    int SendMsg(CMsgPacker *pMsg, int Flags, int ClientId) override;
 
    void DoSnapshot();
 
    static int NewClientCallback(int ClientId, void *pUser, bool Sixup);
    static int NewClientNoAuthCallback(int ClientId, void *pUser);
    static int DelClientCallback(int ClientId, const char *pReason, void *pUser);
 
    static int ClientRejoinCallback(int ClientId, void *pUser, bool Sixup, bool VanillaAuth);
 
    void UpdateDebugDummies(bool ForceDisconnect);
 
    void SendRconType(int ClientId, bool UsernameReq);
    void SendCapabilities(int ClientId);
    void SendMap(int ClientId);
    void SendMapData(int ClientId, int Chunk);
    void SendMapReload(int ClientId);
    void SendConnectionReady(int ClientId);
    void SendRconLine(int ClientId, const char *pLine);
    // Accepts -1 as ClientId to mean "all clients with at least auth level admin"
    void SendRconLogLine(int ClientId, const CLogMessage *pMessage);
 
    void SendRconCmdAdd(const IConsole::ICommandInfo *pCommandInfo, int ClientId);
    void SendRconCmdRem(const IConsole::ICommandInfo *pCommandInfo, int ClientId);
    void SendRconCmdGroupStart(int ClientId);
    void SendRconCmdGroupEnd(int ClientId);
    int NumRconCommands(int ClientId);
    void UpdateClientRconCommands(int ClientId);
 
    class CMaplistEntry
    {
    public:
        char m_aName[128];
 
        CMaplistEntry() = default;
        CMaplistEntry(const char *pName);
        bool operator<(const CMaplistEntry &Other) const;
    };
    std::vector<CMaplistEntry> m_vMaplistEntries;
    void SendMaplistGroupStart(int ClientId);
    void SendMaplistGroupEnd(int ClientId);
    void UpdateClientMaplistEntries(int ClientId);
 
    bool CheckReservedSlotAuth(int ClientId, const char *pPassword);
    bool TakePreInputBudget(int ClientId);
    void ProcessClientPacket(CNetChunk *pPacket);
    void OnNetMsgClientVer(int ClientId, CUuid *pConnectionId, int DDNetVersion, const char *pDDNetVersionStr);
    void OnNetMsgInfo(int ClientId, const char *pVersion, const char *pPasswordOrNullptr);
    void OnNetMsgReady(int ClientId);
    void OnNetMsgEnterGame(int ClientId);
    void OnNetMsgRconCmd(int ClientId, const char *pCmd);
    void OnNetMsgRconAuth(int ClientId, const char *pName, const char *pPw, bool SendRconCmds);
 
    class CCache
    {
    public:
        class CCacheChunk
        {
        public:
            CCacheChunk(const void *pData, int Size);
            CCacheChunk(const CCacheChunk &) = delete;
            CCacheChunk(CCacheChunk &&) = default;
 
            std::vector<uint8_t> m_vData;
        };
 
        std::vector<CCacheChunk> m_vCache;
 
        CCache();
        ~CCache();
 
        void AddChunk(const void *pData, int Size);
        void Clear();
    };
    CCache m_aServerInfoCache[3 * 2];
    CCache m_aSixupServerInfoCache[2];
    bool m_ServerInfoNeedsUpdate = false;
    bool m_ServerInfoNeedsResend = false;
 
    void FillAntibot(CAntibotRoundData *pData) override;
 
    void ExpireServerInfo() override;
    void ExpireServerInfoAndQueueResend();
    void CacheServerInfo(CCache *pCache, int Type, bool SendClients);
    void CacheServerInfoSixup(CCache *pCache, bool SendClients, int MaxConsideredClients);
    void SendServerInfo(const NETADDR *pAddr, int Token, int Type, bool SendClients);
    void GetServerInfoSixup(CPacker *pPacker, bool SendClients);
    // Whether a connection-less server info response may be sent, and if so whether it
    // includes the client list.
    std::optional<bool> RateLimitServerInfoConnless();
    void UpdateRegisterServerInfo();
    void UpdateServerInfo(bool Resend);
 
    void PumpNetwork();
 
    void ChangeMap(const char *pMap) override;
    void ReloadMap() override;
    int LoadMap(const char *pMapName);
    void WritePortFile();
 
    void SaveDemo(int ClientId, float Time) override;
    void StartRecord(int ClientId) override;
    void StopRecord(int ClientId) override;
    bool IsRecording(int ClientId) override;
    void StopDemos() override;
 
    int Run();
 
    static void ConKick(IConsole::IResult *pResult, void *pUser);
    static void ConStatus(IConsole::IResult *pResult, void *pUser);
    static void ConShutdown(IConsole::IResult *pResult, void *pUser);
    static void ConRecord(IConsole::IResult *pResult, void *pUser);
    static void ConStopRecord(IConsole::IResult *pResult, void *pUser);
    static void ConMapReload(IConsole::IResult *pResult, void *pUser);
    static void ConLogout(IConsole::IResult *pResult, void *pUser);
    static void ConShowIps(IConsole::IResult *pResult, void *pUser);
    static void ConHideAuthStatus(IConsole::IResult *pResult, void *pUser);
    static void ConForceHighBandwidthOnSpectate(IConsole::IResult *pResult, void *pUser);
 
    static void ConAuthAdd(IConsole::IResult *pResult, void *pUser);
    static void ConAuthAddHashed(IConsole::IResult *pResult, void *pUser);
    static void ConAuthUpdate(IConsole::IResult *pResult, void *pUser);
    static void ConAuthUpdateHashed(IConsole::IResult *pResult, void *pUser);
    static void ConAuthRemove(IConsole::IResult *pResult, void *pUser);
    static void ConAuthList(IConsole::IResult *pResult, void *pUser);
 
    // console commands for sqlmasters
    static void ConAddSqlServer(IConsole::IResult *pResult, void *pUserData);
    static void ConDumpSqlServers(IConsole::IResult *pResult, void *pUserData);
 
    static void ConReloadAnnouncement(IConsole::IResult *pResult, void *pUserData);
    static void ConReloadMaplist(IConsole::IResult *pResult, void *pUserData);
 
    static void ConchainSpecialInfoupdate(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainMaxclientsperipUpdate(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainCommandAccessUpdate(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
 
    void LogoutClient(int ClientId, const char *pReason);
    void LogoutKey(int Key, const char *pReason);
 
    void ConchainRconPasswordChangeGeneric(const char *pRoleName, const char *pCurrent, IConsole::IResult *pResult);
    static void ConchainRconPasswordChange(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainRconModPasswordChange(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainRconHelperPasswordChange(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainMapUpdate(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainSixupUpdate(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainRegisterCommunityTokenRedact(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainLoglevel(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainStdoutOutputLevel(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainAnnouncementFilename(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
    static void ConchainInputFifo(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
 
#if defined(CONF_FAMILY_UNIX)
    static void ConchainConnLoggingServerChange(IConsole::IResult *pResult, void *pUserData, IConsole::FCommandCallback pfnCallback, void *pCallbackUserData);
#endif
 
    void RegisterCommands();
 
    std::optional<int> SnapNewId() override;
    void SnapFreeId(int Id) override;
    bool SnapNewItem(int Type, int Id, const void *pData, int Size) override;
    void SnapSetStaticsize(int ItemType, int Size) override;
    void SnapSetStaticsize7(int ItemType, int Size) override;
 
    // DDRace
 
    int m_aPrevStates[MAX_CLIENTS];
    const char *GetAnnouncementLine() override;
    void ReadAnnouncementsFile();
 
    static int MaplistEntryCallback(const char *pFilename, int IsDir, int DirType, void *pUser);
    void InitMaplist();
 
    int *GetIdMap(int ClientId) override;
    int *GetReverseIdMap(int ClientId) override;
 
    void InitDnsbl(int ClientId);
    bool DnsblWhite(int ClientId) override
    {
        return m_aClients[ClientId].m_DnsblState == EDnsblState::NONE ||
               m_aClients[ClientId].m_DnsblState == EDnsblState::WHITELISTED;
    }
    bool DnsblPending(int ClientId) override
    {
        return m_aClients[ClientId].m_DnsblState == EDnsblState::PENDING;
    }
    bool DnsblBlack(int ClientId) override
    {
        return m_aClients[ClientId].m_DnsblState == EDnsblState::BLACKLISTED;
    }
 
    static bool CanClientUseCommandCallback(int ClientId, const IConsole::ICommandInfo *pCommand, void *pUser);
    bool CanClientUseCommand(int ClientId, const IConsole::ICommandInfo *pCommand) const;
    void AuthRemoveKey(int KeySlot);
    bool ClientPrevIngame(int ClientId) override { return m_aPrevStates[ClientId] == CClient::STATE_INGAME; }
    const char *GetNetErrorString(int ClientId) override { return m_NetServer.ErrorString(ClientId); }
    void ResetNetErrorString(int ClientId) override { m_NetServer.ResetErrorString(ClientId); }
    bool SetTimedOut(int ClientId, int OrigId) override;
    void SetTimeoutProtected(int ClientId) override { m_NetServer.IgnoreTimeouts(ClientId); }
 
    void SendMsgRaw(int ClientId, const void *pData, int Size, int Flags) override;
 
    bool ErrorShutdown() const { return m_aErrorShutdownReason[0] != 0; }
    void SetErrorShutdown(const char *pReason) override;
 
    bool IsSixup(int ClientId) const override { return ClientId != SERVER_DEMO_CLIENT && m_aClients[ClientId].m_Sixup; }
    int GetMaxClients(int ClientId) const override;
    bool ClientSupportsServerMaxClients(int ClientId) const override;
 
    void SetLoggers(std::shared_ptr<ILogger> &&pFileLogger, std::shared_ptr<ILogger> &&pStdoutLogger);
 
#ifdef CONF_FAMILY_UNIX
    enum CONN_LOGGING_CMD
    {
        OPEN_SESSION = 1,
        CLOSE_SESSION = 2,
    };
 
    void SendConnLoggingCommand(CONN_LOGGING_CMD Cmd, const NETADDR *pAddr);
#endif
};
 
bool IsInterrupted();
 
extern CServer *CreateServer();
#endif