3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include "serialization.h" // For SER_FMT_VER_INVALID
27 #include "content/mods.h"
28 #include "inventorymanager.h"
29 #include "content/subgames.h"
30 #include "tileanimation.h" // TileAnimationParams
31 #include "particles.h" // ParticleParams
32 #include "network/peerhandler.h"
33 #include "network/address.h"
34 #include "util/numeric.h"
35 #include "util/thread.h"
36 #include "util/basic_macros.h"
37 #include "util/metricsbackend.h"
38 #include "serverenvironment.h"
39 #include "clientiface.h"
40 #include "chatmessage.h"
41 #include "translation.h"
46 #include <unordered_set>
51 class IWritableItemDefManager;
53 class IWritableCraftDefManager;
60 struct PlayerHPChangeReason;
61 class IRollbackManager;
62 struct RollbackAction;
64 class ServerScripting;
65 class ServerEnvironment;
66 struct SimpleSoundSpec;
73 class ServerModManager;
74 class ServerInventoryManager;
76 enum ClientDeletionReason {
85 std::string sha1_digest; // base64-encoded
86 bool no_announce; // true: not announced in TOCLIENT_ANNOUNCE_MEDIA (at player join)
88 MediaInfo(const std::string &path_="",
89 const std::string &sha1_digest_=""):
91 sha1_digest(sha1_digest_),
97 struct ServerSoundParams
108 float max_hear_distance = 32 * BS;
111 std::string to_player = "";
112 std::string exclude_player = "";
114 v3f getPos(ServerEnvironment *env, bool *pos_exists) const;
117 struct ServerPlayingSound
119 ServerSoundParams params;
120 SimpleSoundSpec spec;
121 std::unordered_set<session_t> clients; // peer ids
125 MinimapType type = MINIMAP_TYPE_OFF;
132 // structure for everything getClientInfo returns, for convenience
139 u8 major, minor, patch;
140 std::string vers_string, lang_code;
143 class Server : public con::PeerHandler, public MapEventReceiver,
148 NOTE: Every public method should be thread-safe
152 const std::string &path_world,
153 const SubgameSpec &gamespec,
154 bool simple_singleplayer_mode,
157 ChatInterface *iface = nullptr,
158 std::string *on_shutdown_errmsg = nullptr
161 DISABLE_CLASS_COPY(Server);
165 // This is mainly a way to pass the time to the server.
166 // Actual processing is done in an another thread.
167 void step(float dtime);
168 // This is run by ServerThread and does the actual processing
169 void AsyncRunStep(bool initial_step=false);
171 PlayerSAO* StageTwoClientInit(session_t peer_id);
177 void handleCommand(NetworkPacket* pkt);
179 void handleCommand_Null(NetworkPacket* pkt) {};
180 void handleCommand_Deprecated(NetworkPacket* pkt);
181 void handleCommand_Init(NetworkPacket* pkt);
182 void handleCommand_Init2(NetworkPacket* pkt);
183 void handleCommand_ModChannelJoin(NetworkPacket *pkt);
184 void handleCommand_ModChannelLeave(NetworkPacket *pkt);
185 void handleCommand_ModChannelMsg(NetworkPacket *pkt);
186 void handleCommand_RequestMedia(NetworkPacket* pkt);
187 void handleCommand_ClientReady(NetworkPacket* pkt);
188 void handleCommand_GotBlocks(NetworkPacket* pkt);
189 void handleCommand_PlayerPos(NetworkPacket* pkt);
190 void handleCommand_DeletedBlocks(NetworkPacket* pkt);
191 void handleCommand_InventoryAction(NetworkPacket* pkt);
192 void handleCommand_ChatMessage(NetworkPacket* pkt);
193 void handleCommand_Damage(NetworkPacket* pkt);
194 void handleCommand_PlayerItem(NetworkPacket* pkt);
195 void handleCommand_Respawn(NetworkPacket* pkt);
196 void handleCommand_Interact(NetworkPacket* pkt);
197 void handleCommand_RemovedSounds(NetworkPacket* pkt);
198 void handleCommand_NodeMetaFields(NetworkPacket* pkt);
199 void handleCommand_InventoryFields(NetworkPacket* pkt);
200 void handleCommand_FirstSrp(NetworkPacket* pkt);
201 void handleCommand_SrpBytesA(NetworkPacket* pkt);
202 void handleCommand_SrpBytesM(NetworkPacket* pkt);
203 void handleCommand_HaveMedia(NetworkPacket *pkt);
205 void ProcessData(NetworkPacket *pkt);
207 void Send(NetworkPacket *pkt);
208 void Send(session_t peer_id, NetworkPacket *pkt);
210 // Helper for handleCommand_PlayerPos and handleCommand_Interact
211 void process_PlayerPos(RemotePlayer *player, PlayerSAO *playersao,
214 // Both setter and getter need no envlock,
215 // can be called freely from threads
216 void setTimeOfDay(u32 time);
219 Shall be called with the environment locked.
220 This is accessed by the map, which is inside the environment,
221 so it shouldn't be a problem.
223 void onMapEditEvent(const MapEditEvent &event);
225 // Connection must be locked when called
226 std::string getStatusString();
227 inline double getUptime() const { return m_uptime_counter->get(); }
229 // read shutdown state
230 inline bool isShutdownRequested() const { return m_shutdown_state.is_requested; }
232 // request server to shutdown
233 void requestShutdown(const std::string &msg, bool reconnect, float delay = 0.0f);
235 // Returns -1 if failed, sound handle on success
237 s32 playSound(const SimpleSoundSpec &spec, const ServerSoundParams ¶ms,
238 bool ephemeral=false);
239 void stopSound(s32 handle);
240 void fadeSound(s32 handle, float step, float gain);
243 std::set<std::string> getPlayerEffectivePrivs(const std::string &name);
244 bool checkPriv(const std::string &name, const std::string &priv);
245 void reportPrivsModified(const std::string &name=""); // ""=all
246 void reportInventoryFormspecModified(const std::string &name);
247 void reportFormspecPrependModified(const std::string &name);
249 void setIpBanned(const std::string &ip, const std::string &name);
250 void unsetIpBanned(const std::string &ip_or_name);
251 std::string getBanDescription(const std::string &ip_or_name);
253 void notifyPlayer(const char *name, const std::wstring &msg);
254 void notifyPlayers(const std::wstring &msg);
256 void spawnParticle(const std::string &playername,
257 const ParticleParameters &p);
259 u32 addParticleSpawner(const ParticleSpawnerParameters &p,
260 ServerActiveObject *attached, const std::string &playername);
262 void deleteParticleSpawner(const std::string &playername, u32 id);
264 bool dynamicAddMedia(std::string filepath, u32 token,
265 const std::string &to_player, bool ephemeral);
267 ServerInventoryManager *getInventoryMgr() const { return m_inventory_mgr.get(); }
268 void sendDetachedInventory(Inventory *inventory, const std::string &name, session_t peer_id);
270 // Envlock and conlock should be locked when using scriptapi
271 ServerScripting *getScriptIface(){ return m_script; }
273 // actions: time-reversed list
274 // Return value: success/failure
275 bool rollbackRevertActions(const std::list<RollbackAction> &actions,
276 std::list<std::string> *log);
278 // IGameDef interface
280 virtual IItemDefManager* getItemDefManager();
281 virtual const NodeDefManager* getNodeDefManager();
282 virtual ICraftDefManager* getCraftDefManager();
283 virtual u16 allocateUnknownNodeId(const std::string &name);
284 IRollbackManager *getRollbackManager() { return m_rollback; }
285 virtual EmergeManager *getEmergeManager() { return m_emerge; }
286 virtual ModMetadataDatabase *getModStorageDatabase() { return m_mod_storage_database; }
288 IWritableItemDefManager* getWritableItemDefManager();
289 NodeDefManager* getWritableNodeDefManager();
290 IWritableCraftDefManager* getWritableCraftDefManager();
292 virtual const std::vector<ModSpec> &getMods() const;
293 virtual const ModSpec* getModSpec(const std::string &modname) const;
294 void getModNames(std::vector<std::string> &modlist);
295 std::string getBuiltinLuaPath();
296 virtual std::string getWorldPath() const { return m_path_world; }
298 inline bool isSingleplayer()
299 { return m_simple_singleplayer_mode; }
301 inline void setAsyncFatalError(const std::string &error)
302 { m_async_fatal_error.set(error); }
303 inline void setAsyncFatalError(const LuaError &e)
305 setAsyncFatalError(std::string("Lua: ") + e.what());
308 bool showFormspec(const char *name, const std::string &formspec, const std::string &formname);
309 Map & getMap() { return m_env->getMap(); }
310 ServerEnvironment & getEnv() { return *m_env; }
313 u32 hudAdd(RemotePlayer *player, HudElement *element);
314 bool hudRemove(RemotePlayer *player, u32 id);
315 bool hudChange(RemotePlayer *player, u32 id, HudElementStat stat, void *value);
316 bool hudSetFlags(RemotePlayer *player, u32 flags, u32 mask);
317 bool hudSetHotbarItemcount(RemotePlayer *player, s32 hotbar_itemcount);
318 void hudSetHotbarImage(RemotePlayer *player, const std::string &name);
319 void hudSetHotbarSelectedImage(RemotePlayer *player, const std::string &name);
321 Address getPeerAddress(session_t peer_id);
323 void setLocalPlayerAnimations(RemotePlayer *player, v2s32 animation_frames[4],
325 void setPlayerEyeOffset(RemotePlayer *player, const v3f &first, const v3f &third);
327 void setSky(RemotePlayer *player, const SkyboxParams ¶ms);
328 void setSun(RemotePlayer *player, const SunParams ¶ms);
329 void setMoon(RemotePlayer *player, const MoonParams ¶ms);
330 void setStars(RemotePlayer *player, const StarParams ¶ms);
332 void setClouds(RemotePlayer *player, const CloudParams ¶ms);
334 void overrideDayNightRatio(RemotePlayer *player, bool do_override, float brightness);
336 /* con::PeerHandler implementation. */
337 void peerAdded(con::Peer *peer);
338 void deletingPeer(con::Peer *peer, bool timeout);
340 void DenySudoAccess(session_t peer_id);
341 void DenyAccessVerCompliant(session_t peer_id, u16 proto_ver, AccessDeniedCode reason,
342 const std::string &str_reason = "", bool reconnect = false);
343 void DenyAccess(session_t peer_id, AccessDeniedCode reason,
344 const std::string &custom_reason = "");
345 void acceptAuth(session_t peer_id, bool forSudoMode);
346 void DenyAccess_Legacy(session_t peer_id, const std::wstring &reason);
347 void DisconnectPeer(session_t peer_id);
348 bool getClientConInfo(session_t peer_id, con::rtt_stat_type type, float *retval);
349 bool getClientInfo(session_t peer_id, ClientInfo &ret);
351 void printToConsoleOnly(const std::string &text);
353 void HandlePlayerHPChange(PlayerSAO *sao, const PlayerHPChangeReason &reason);
354 void SendPlayerHP(PlayerSAO *sao);
355 void SendPlayerBreath(PlayerSAO *sao);
356 void SendInventory(PlayerSAO *playerSAO, bool incremental);
357 void SendMovePlayer(session_t peer_id);
358 void SendPlayerSpeed(session_t peer_id, const v3f &added_vel);
359 void SendPlayerFov(session_t peer_id);
361 void SendMinimapModes(session_t peer_id,
362 std::vector<MinimapMode> &modes,
365 void sendDetachedInventories(session_t peer_id, bool incremental);
367 virtual bool registerModStorage(ModMetadata *storage);
368 virtual void unregisterModStorage(const std::string &name);
370 bool joinModChannel(const std::string &channel);
371 bool leaveModChannel(const std::string &channel);
372 bool sendModChannelMessage(const std::string &channel, const std::string &message);
373 ModChannel *getModChannel(const std::string &channel);
375 // Send block to specific player only
376 bool SendBlock(session_t peer_id, const v3s16 &blockpos);
378 // Get or load translations for a language
379 Translations *getTranslationLanguage(const std::string &lang_code);
381 static ModMetadataDatabase *openModStorageDatabase(const std::string &world_path);
383 static ModMetadataDatabase *openModStorageDatabase(const std::string &backend,
384 const std::string &world_path, const Settings &world_mt);
386 static bool migrateModStorageDatabase(const GameParams &game_params,
387 const Settings &cmd_args);
392 // Environment mutex (envlock)
393 std::mutex m_env_mutex;
396 friend class EmergeThread;
397 friend class RemoteClient;
398 friend class TestServerShutdownState;
400 struct ShutdownState {
401 friend class TestServerShutdownState;
403 bool is_requested = false;
404 bool should_reconnect = false;
408 void trigger(float delay, const std::string &msg, bool reconnect);
409 void tick(float dtime, Server *server);
410 std::wstring getShutdownTimerMessage() const;
411 bool isTimerRunning() const { return m_timer > 0.0f; }
413 float m_timer = 0.0f;
416 struct PendingDynamicMediaCallback {
417 std::string filename; // only set if media entry and file is to be deleted
419 std::unordered_set<session_t> waiting_players;
424 void SendMovement(session_t peer_id);
425 void SendHP(session_t peer_id, u16 hp);
426 void SendBreath(session_t peer_id, u16 breath);
427 void SendAccessDenied(session_t peer_id, AccessDeniedCode reason,
428 const std::string &custom_reason, bool reconnect = false);
429 void SendAccessDenied_Legacy(session_t peer_id, const std::wstring &reason);
430 void SendDeathscreen(session_t peer_id, bool set_camera_point_target,
431 v3f camera_point_target);
432 void SendItemDef(session_t peer_id, IItemDefManager *itemdef, u16 protocol_version);
433 void SendNodeDef(session_t peer_id, const NodeDefManager *nodedef,
434 u16 protocol_version);
436 /* mark blocks not sent for all clients */
437 void SetBlocksNotSent(std::map<v3s16, MapBlock *>& block);
440 virtual void SendChatMessage(session_t peer_id, const ChatMessage &message);
441 void SendTimeOfDay(session_t peer_id, u16 time, f32 time_speed);
443 void SendLocalPlayerAnimations(session_t peer_id, v2s32 animation_frames[4],
444 f32 animation_speed);
445 void SendEyeOffset(session_t peer_id, v3f first, v3f third);
446 void SendPlayerPrivileges(session_t peer_id);
447 void SendPlayerInventoryFormspec(session_t peer_id);
448 void SendPlayerFormspecPrepend(session_t peer_id);
449 void SendShowFormspecMessage(session_t peer_id, const std::string &formspec,
450 const std::string &formname);
451 void SendHUDAdd(session_t peer_id, u32 id, HudElement *form);
452 void SendHUDRemove(session_t peer_id, u32 id);
453 void SendHUDChange(session_t peer_id, u32 id, HudElementStat stat, void *value);
454 void SendHUDSetFlags(session_t peer_id, u32 flags, u32 mask);
455 void SendHUDSetParam(session_t peer_id, u16 param, const std::string &value);
456 void SendSetSky(session_t peer_id, const SkyboxParams ¶ms);
457 void SendSetSun(session_t peer_id, const SunParams ¶ms);
458 void SendSetMoon(session_t peer_id, const MoonParams ¶ms);
459 void SendSetStars(session_t peer_id, const StarParams ¶ms);
460 void SendCloudParams(session_t peer_id, const CloudParams ¶ms);
461 void SendOverrideDayNightRatio(session_t peer_id, bool do_override, float ratio);
462 void broadcastModChannelMessage(const std::string &channel,
463 const std::string &message, session_t from_peer);
466 Send a node removal/addition event to all clients except ignore_id.
467 Additionally, if far_players!=NULL, players further away than
468 far_d_nodes are ignored and their peer_ids are added to far_players
470 // Envlock and conlock should be locked when calling these
471 void sendRemoveNode(v3s16 p, std::unordered_set<u16> *far_players = nullptr,
472 float far_d_nodes = 100);
473 void sendAddNode(v3s16 p, MapNode n,
474 std::unordered_set<u16> *far_players = nullptr,
475 float far_d_nodes = 100, bool remove_metadata = true);
477 void sendMetadataChanged(const std::list<v3s16> &meta_updates,
478 float far_d_nodes = 100);
480 // Environment and Connection must be locked when called
481 void SendBlockNoLock(session_t peer_id, MapBlock *block, u8 ver, u16 net_proto_version);
483 // Sends blocks to clients (locks env and con on its own)
484 void SendBlocks(float dtime);
486 bool addMediaFile(const std::string &filename, const std::string &filepath,
487 std::string *filedata = nullptr, std::string *digest = nullptr);
488 void fillMediaCache();
489 void sendMediaAnnouncement(session_t peer_id, const std::string &lang_code);
490 void sendRequestedMedia(session_t peer_id,
491 const std::vector<std::string> &tosend);
492 void stepPendingDynMediaCallbacks(float dtime);
494 // Adds a ParticleSpawner on peer with peer_id (PEER_ID_INEXISTENT == all)
495 void SendAddParticleSpawner(session_t peer_id, u16 protocol_version,
496 const ParticleSpawnerParameters &p, u16 attached_id, u32 id);
498 void SendDeleteParticleSpawner(session_t peer_id, u32 id);
500 // Spawns particle on peer with peer_id (PEER_ID_INEXISTENT == all)
501 void SendSpawnParticle(session_t peer_id, u16 protocol_version,
502 const ParticleParameters &p);
504 void SendActiveObjectRemoveAdd(RemoteClient *client, PlayerSAO *playersao);
505 void SendActiveObjectMessages(session_t peer_id, const std::string &datas,
506 bool reliable = true);
507 void SendCSMRestrictionFlags(session_t peer_id);
513 void HandlePlayerDeath(PlayerSAO* sao, const PlayerHPChangeReason &reason);
514 void RespawnPlayer(session_t peer_id);
515 void DeleteClient(session_t peer_id, ClientDeletionReason reason);
516 void UpdateCrafting(RemotePlayer *player);
517 bool checkInteractDistance(RemotePlayer *player, const f32 d, const std::string &what);
519 void handleChatInterfaceEvent(ChatEvent *evt);
521 // This returns the answer to the sender of wmessage, or "" if there is none
522 std::wstring handleChat(const std::string &name, std::wstring wmessage_input,
523 bool check_shout_priv = false, RemotePlayer *player = nullptr);
524 void handleAdminChat(const ChatEventChat *evt);
526 // When called, connection mutex should be locked
527 RemoteClient* getClient(session_t peer_id, ClientState state_min = CS_Active);
528 RemoteClient* getClientNoEx(session_t peer_id, ClientState state_min = CS_Active);
530 // When called, environment mutex should be locked
531 std::string getPlayerName(session_t peer_id);
532 PlayerSAO *getPlayerSAO(session_t peer_id);
535 Get a player from memory or creates one.
536 If player is already connected, return NULL
537 Does not verify/modify auth info and password.
539 Call with env and con locked.
541 PlayerSAO *emergePlayer(const char *name, session_t peer_id, u16 proto_version);
543 void handlePeerChanges();
549 std::string m_path_world;
550 // Subgame specification
551 SubgameSpec m_gamespec;
552 // If true, do not allow multiple players and hide some multiplayer
554 bool m_simple_singleplayer_mode;
555 u16 m_max_chatmessage_length;
556 // For "dedicated" server list flag
558 Settings *m_game_settings = nullptr;
560 // Thread can set; step() will throw as ServerError
561 MutexedVariable<std::string> m_async_fatal_error;
564 float m_liquid_transform_timer = 0.0f;
565 float m_liquid_transform_every = 1.0f;
566 float m_masterserver_timer = 0.0f;
567 float m_emergethread_trigger_timer = 0.0f;
568 float m_savemap_timer = 0.0f;
569 IntervalLimiter m_map_timer_and_unload_interval;
572 ServerEnvironment *m_env = nullptr;
574 // Reference to the server map until ServerEnvironment is initialized
575 // after that this variable must be a nullptr
576 ServerMap *m_startup_server_map = nullptr;
579 std::shared_ptr<con::Connection> m_con;
582 BanManager *m_banmanager = nullptr;
584 // Rollback manager (behind m_env_mutex)
585 IRollbackManager *m_rollback = nullptr;
588 EmergeManager *m_emerge = nullptr;
591 // Envlock and conlock should be locked when using Lua
592 ServerScripting *m_script = nullptr;
594 // Item definition manager
595 IWritableItemDefManager *m_itemdef;
597 // Node definition manager
598 NodeDefManager *m_nodedef;
600 // Craft definition manager
601 IWritableCraftDefManager *m_craftdef;
604 std::unique_ptr<ServerModManager> m_modmgr;
606 std::unordered_map<std::string, Translations> server_translations;
611 // A buffer for time steps
612 // step() increments and AsyncRunStep() run by m_thread reads it.
613 float m_step_dtime = 0.0f;
614 std::mutex m_step_dtime_mutex;
616 // The server mainly operates in this thread
617 ServerThread *m_thread = nullptr;
622 // Timer for sending time of day over network
623 float m_time_of_day_send_timer = 0.0f;
628 ClientInterface m_clients;
632 Queues stuff from peerAdded() and deletingPeer() to
635 std::queue<con::PeerChange> m_peer_change_queue;
637 std::unordered_map<session_t, std::string> m_formspec_state_data;
643 ShutdownState m_shutdown_state;
645 ChatInterface *m_admin_chat;
646 std::string m_admin_nick;
648 // if a mod-error occurs in the on_shutdown callback, the error message will
649 // be written into this
650 std::string *const m_on_shutdown_errmsg;
653 Map edit event queue. Automatically receives all map edits.
654 The constructor of this class registers us to receive them through
657 NOTE: Should these be moved to actually be members of
662 Queue of map edits from the environment for sending to the clients
663 This is behind m_env_mutex
665 std::queue<MapEditEvent*> m_unsent_map_edit_queue;
667 If a non-empty area, map edit events contained within are left
668 unsent. Done at map generation time to speed up editing of the
669 generated area, as it will be sent anyway.
670 This is behind m_env_mutex
672 VoxelArea m_ignore_map_edit_events_area;
674 // media files known to server
675 std::unordered_map<std::string, MediaInfo> m_media;
677 // pending dynamic media callbacks, clients inform the server when they have a file fetched
678 std::unordered_map<u32, PendingDynamicMediaCallback> m_pending_dyn_media;
679 float m_step_pending_dyn_media_timer = 0.0f;
684 std::unordered_map<s32, ServerPlayingSound> m_playing_sounds;
685 s32 m_next_sound_id = 0; // positive values only
688 std::unordered_map<std::string, ModMetadata *> m_mod_storages;
689 ModMetadataDatabase *m_mod_storage_database = nullptr;
690 float m_mod_storage_save_timer = 10.0f;
692 // CSM restrictions byteflag
693 u64 m_csm_restriction_flags = CSMRestrictionFlags::CSM_RF_NONE;
694 u32 m_csm_restriction_noderange = 8;
696 // ModChannel manager
697 std::unique_ptr<ModChannelMgr> m_modchannel_mgr;
700 std::unique_ptr<ServerInventoryManager> m_inventory_mgr;
702 // Global server metrics backend
703 std::unique_ptr<MetricsBackend> m_metrics_backend;
706 MetricCounterPtr m_uptime_counter;
707 MetricGaugePtr m_player_gauge;
708 MetricGaugePtr m_timeofday_gauge;
709 // current server step lag
710 MetricGaugePtr m_lag_gauge;
711 MetricCounterPtr m_aom_buffer_counter;
712 MetricCounterPtr m_packet_recv_counter;
713 MetricCounterPtr m_packet_recv_processed_counter;
717 Runs a simple dedicated server loop.
719 Shuts down when kill is set to true.
721 void dedicated_server_loop(Server &server, bool &kill);