3 Copyright (C) 2010-2011 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 General Public License as published by
7 the Free Software Foundation; either version 2 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 General Public License for more details.
15 You should have received a copy of the GNU 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.
23 #include "connection.h"
24 #include "environment.h"
25 #include "common_irrlicht.h"
29 #include "inventory.h"
32 #include "serialization.h" // For SER_FMT_VER_INVALID
34 #include "inventorymanager.h"
38 typedef struct lua_State lua_State;
39 class IWritableItemDefManager;
40 class IWritableNodeDefManager;
41 class IWritableCraftDefManager;
45 class ServerError : public std::exception
48 ServerError(const std::string &s)
50 m_s = "ServerError: ";
53 virtual ~ServerError() throw()
55 virtual const char * what() const throw()
65 v3f findSpawnPos(ServerMap &map);
68 A structure containing the data needed for queueing the fetching
71 struct QueuedBlockEmerge
74 // key = peer_id, value = flags
75 core::map<u16, u8> peer_ids;
79 This is a thread-safe class.
81 class BlockEmergeQueue
91 JMutexAutoLock lock(m_mutex);
93 core::list<QueuedBlockEmerge*>::Iterator i;
94 for(i=m_queue.begin(); i!=m_queue.end(); i++)
96 QueuedBlockEmerge *q = *i;
102 peer_id=0 adds with nobody to send to
104 void addBlock(u16 peer_id, v3s16 pos, u8 flags)
106 DSTACK(__FUNCTION_NAME);
108 JMutexAutoLock lock(m_mutex);
113 Find if block is already in queue.
114 If it is, update the peer to it and quit.
116 core::list<QueuedBlockEmerge*>::Iterator i;
117 for(i=m_queue.begin(); i!=m_queue.end(); i++)
119 QueuedBlockEmerge *q = *i;
122 q->peer_ids[peer_id] = flags;
131 QueuedBlockEmerge *q = new QueuedBlockEmerge;
134 q->peer_ids[peer_id] = flags;
135 m_queue.push_back(q);
138 // Returned pointer must be deleted
139 // Returns NULL if queue is empty
140 QueuedBlockEmerge * pop()
142 JMutexAutoLock lock(m_mutex);
144 core::list<QueuedBlockEmerge*>::Iterator i = m_queue.begin();
145 if(i == m_queue.end())
147 QueuedBlockEmerge *q = *i;
154 JMutexAutoLock lock(m_mutex);
155 return m_queue.size();
158 u32 peerItemCount(u16 peer_id)
160 JMutexAutoLock lock(m_mutex);
164 core::list<QueuedBlockEmerge*>::Iterator i;
165 for(i=m_queue.begin(); i!=m_queue.end(); i++)
167 QueuedBlockEmerge *q = *i;
168 if(q->peer_ids.find(peer_id) != NULL)
176 core::list<QueuedBlockEmerge*> m_queue;
182 class ServerThread : public SimpleThread
188 ServerThread(Server *server):
197 class EmergeThread : public SimpleThread
203 EmergeThread(Server *server):
214 if(IsRunning() == false)
224 char name[PLAYERNAME_SIZE];
230 void PrintLine(std::ostream *s);
234 Used for queueing and sorting block transfers in containers
236 Lower priority number means higher priority.
238 struct PrioritySortedBlockTransfer
240 PrioritySortedBlockTransfer(float a_priority, v3s16 a_pos, u16 a_peer_id)
242 priority = a_priority;
246 bool operator < (PrioritySortedBlockTransfer &other)
248 return priority < other.priority;
259 MediaRequest(const std::string &name_=""):
267 std::string sha1_digest;
269 MediaInfo(const std::string path_="",
270 const std::string sha1_digest_=""):
272 sha1_digest(sha1_digest_)
277 struct ServerSoundParams
280 std::string to_player;
288 float max_hear_distance;
297 max_hear_distance(32*BS),
301 v3f getPos(ServerEnvironment *env, bool *pos_exists) const;
304 struct ServerPlayingSound
306 ServerSoundParams params;
307 std::set<u16> clients; // peer ids
313 // peer_id=0 means this client has no associated peer
314 // NOTE: If client is made allowed to exist while peer doesn't,
315 // this has to be set to 0 when there is no peer.
316 // Also, the client must be moved to some other container.
318 // The serialization version to use with the client
319 u8 serialization_version;
321 u16 net_proto_version;
322 // Version is stored in here after INIT before INIT2
323 u8 pending_serialization_version;
325 bool definitions_sent;
328 m_time_from_building(9999),
329 m_excess_gotblocks(0)
332 serialization_version = SER_FMT_VER_INVALID;
333 net_proto_version = 0;
334 pending_serialization_version = SER_FMT_VER_INVALID;
335 definitions_sent = false;
336 m_nearest_unsent_d = 0;
337 m_nearest_unsent_reset_timer = 0.0;
338 m_nothing_to_send_counter = 0;
339 m_nothing_to_send_pause_timer = 0;
346 Finds block that should be sent next to the client.
347 Environment should be locked when this is called.
348 dtime is used for resetting send radius at slow interval
350 void GetNextBlocks(Server *server, float dtime,
351 core::array<PrioritySortedBlockTransfer> &dest);
353 void GotBlock(v3s16 p);
355 void SentBlock(v3s16 p);
357 void SetBlockNotSent(v3s16 p);
358 void SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks);
362 return m_blocks_sending.size();
365 // Increments timeouts and removes timed-out blocks from list
366 // NOTE: This doesn't fix the server-not-sending-block bug
367 // because it is related to emerging, not sending.
368 //void RunSendingTimeouts(float dtime, float timeout);
370 void PrintInfo(std::ostream &o)
372 o<<"RemoteClient "<<peer_id<<": "
373 <<"m_blocks_sent.size()="<<m_blocks_sent.size()
374 <<", m_blocks_sending.size()="<<m_blocks_sending.size()
375 <<", m_nearest_unsent_d="<<m_nearest_unsent_d
376 <<", m_excess_gotblocks="<<m_excess_gotblocks
378 m_excess_gotblocks = 0;
381 // Time from last placing or removing blocks
382 float m_time_from_building;
384 /*JMutex m_dig_mutex;
385 float m_dig_time_remaining;
388 v3s16 m_dig_position;*/
391 List of active objects that the client knows of.
394 core::map<u16, bool> m_known_objects;
398 Blocks that have been sent to client.
399 - These don't have to be sent again.
400 - A block is cleared from here when client says it has
401 deleted it from it's memory
403 Key is position, value is dummy.
404 No MapBlock* is stored here because the blocks can get deleted.
406 core::map<v3s16, bool> m_blocks_sent;
407 s16 m_nearest_unsent_d;
409 float m_nearest_unsent_reset_timer;
412 Blocks that are currently on the line.
413 This is used for throttling the sending of blocks.
414 - The size of this list is limited to some value
415 Block is added when it is sent with BLOCKDATA.
416 Block is removed when GOTBLOCKS is received.
417 Value is time from sending. (not used at the moment)
419 core::map<v3s16, float> m_blocks_sending;
422 Count of excess GotBlocks().
423 There is an excess amount because the client sometimes
424 gets a block so late that the server sends it again,
425 and the client then sends two GOTBLOCKs.
426 This is resetted by PrintInfo()
428 u32 m_excess_gotblocks;
430 // CPU usage optimization
431 u32 m_nothing_to_send_counter;
432 float m_nothing_to_send_pause_timer;
435 class Server : public con::PeerHandler, public MapEventReceiver,
436 public InventoryManager, public IGameDef,
437 public IBackgroundBlockEmerger
441 NOTE: Every public method should be thread-safe
445 const std::string &path_world,
446 const std::string &path_config,
447 const SubgameSpec &gamespec,
448 bool simple_singleplayer_mode
451 void start(unsigned short port);
453 // This is mainly a way to pass the time to the server.
454 // Actual processing is done in an another thread.
455 void step(float dtime);
456 // This is run by ServerThread and does the actual processing
459 void ProcessData(u8 *data, u32 datasize, u16 peer_id);
461 core::list<PlayerInfo> getPlayerInfo();
463 // Environment must be locked when called
464 void setTimeOfDay(u32 time)
466 m_env->setTimeOfDay(time);
467 m_time_of_day_send_timer = 0;
470 bool getShutdownRequested()
472 return m_shutdown_requested;
476 Shall be called with the environment locked.
477 This is accessed by the map, which is inside the environment,
478 so it shouldn't be a problem.
480 void onMapEditEvent(MapEditEvent *event);
483 Shall be called with the environment and the connection locked.
485 Inventory* getInventory(const InventoryLocation &loc);
486 std::string getInventoryOwner(const InventoryLocation &loc);
487 void setInventoryModified(const InventoryLocation &loc);
489 // Connection must be locked when called
490 std::wstring getStatusString();
492 void requestShutdown(void)
494 m_shutdown_requested = true;
497 // Returns -1 if failed, sound handle on success
499 s32 playSound(const SimpleSoundSpec &spec, const ServerSoundParams ¶ms);
500 void stopSound(s32 handle);
503 std::set<std::string> getPlayerEffectivePrivs(const std::string &name);
504 bool checkPriv(const std::string &name, const std::string &priv);
505 void reportPrivsModified(const std::string &name=""); // ""=all
507 // Saves g_settings to configpath given at initialization
510 void setIpBanned(const std::string &ip, const std::string &name)
512 m_banmanager.add(ip, name);
516 void unsetIpBanned(const std::string &ip_or_name)
518 m_banmanager.remove(ip_or_name);
522 std::string getBanDescription(const std::string &ip_or_name)
524 return m_banmanager.getBanDescription(ip_or_name);
527 Address getPeerAddress(u16 peer_id)
529 return m_con.GetPeerAddress(peer_id);
532 // Envlock and conlock should be locked when calling this
533 void notifyPlayer(const char *name, const std::wstring msg);
534 void notifyPlayers(const std::wstring msg);
536 void queueBlockEmerge(v3s16 blockpos, bool allow_generate);
538 // Envlock and conlock should be locked when using Lua
539 lua_State *getLua(){ return m_lua; }
541 // IGameDef interface
543 virtual IItemDefManager* getItemDefManager();
544 virtual INodeDefManager* getNodeDefManager();
545 virtual ICraftDefManager* getCraftDefManager();
546 virtual ITextureSource* getTextureSource();
547 virtual u16 allocateUnknownNodeId(const std::string &name);
548 virtual ISoundManager* getSoundManager();
549 virtual MtEventManager* getEventManager();
551 IWritableItemDefManager* getWritableItemDefManager();
552 IWritableNodeDefManager* getWritableNodeDefManager();
553 IWritableCraftDefManager* getWritableCraftDefManager();
555 const ModSpec* getModSpec(const std::string &modname);
556 std::string getBuiltinLuaPath();
558 std::string getWorldPath(){ return m_path_world; }
560 bool isSingleplayer(){ return m_simple_singleplayer_mode; }
562 void setAsyncFatalError(const std::string &error)
564 m_async_fatal_error.set(error);
569 // con::PeerHandler implementation.
570 // These queue stuff to be processed by handlePeerChanges().
571 // As of now, these create and remove clients and players.
572 void peerAdded(con::Peer *peer);
573 void deletingPeer(con::Peer *peer, bool timeout);
579 static void SendHP(con::Connection &con, u16 peer_id, u8 hp);
580 static void SendAccessDenied(con::Connection &con, u16 peer_id,
581 const std::wstring &reason);
582 static void SendDeathscreen(con::Connection &con, u16 peer_id,
583 bool set_camera_point_target, v3f camera_point_target);
584 static void SendItemDef(con::Connection &con, u16 peer_id,
585 IItemDefManager *itemdef);
586 static void SendNodeDef(con::Connection &con, u16 peer_id,
587 INodeDefManager *nodedef);
590 Non-static send methods.
591 Conlock should be always used.
592 Envlock usage is documented badly but it's easy to figure out
593 which ones access the environment.
596 // Envlock and conlock should be locked when calling these
597 void SendInventory(u16 peer_id);
598 void SendChatMessage(u16 peer_id, const std::wstring &message);
599 void BroadcastChatMessage(const std::wstring &message);
600 void SendPlayerHP(u16 peer_id);
601 void SendMovePlayer(u16 peer_id);
602 void SendPlayerPrivileges(u16 peer_id);
604 Send a node removal/addition event to all clients except ignore_id.
605 Additionally, if far_players!=NULL, players further away than
606 far_d_nodes are ignored and their peer_ids are added to far_players
608 // Envlock and conlock should be locked when calling these
609 void sendRemoveNode(v3s16 p, u16 ignore_id=0,
610 core::list<u16> *far_players=NULL, float far_d_nodes=100);
611 void sendAddNode(v3s16 p, MapNode n, u16 ignore_id=0,
612 core::list<u16> *far_players=NULL, float far_d_nodes=100);
613 void setBlockNotSent(v3s16 p);
615 // Environment and Connection must be locked when called
616 void SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver);
618 // Sends blocks to clients (locks env and con on its own)
619 void SendBlocks(float dtime);
621 void fillMediaCache();
622 void sendMediaAnnouncement(u16 peer_id);
623 void sendRequestedMedia(u16 peer_id,
624 const core::list<MediaRequest> &tosend);
630 void DiePlayer(u16 peer_id);
631 void RespawnPlayer(u16 peer_id);
633 void UpdateCrafting(u16 peer_id);
635 // When called, connection mutex should be locked
636 RemoteClient* getClient(u16 peer_id);
638 // When called, environment mutex should be locked
639 std::string getPlayerName(u16 peer_id)
641 Player *player = m_env->getPlayer(peer_id);
643 return "[id="+itos(peer_id)+"]";
644 return player->getName();
647 // When called, environment mutex should be locked
648 PlayerSAO* getPlayerSAO(u16 peer_id)
650 Player *player = m_env->getPlayer(peer_id);
653 return player->getPlayerSAO();
657 Get a player from memory or creates one.
658 If player is already connected, return NULL
659 Does not verify/modify auth info and password.
661 Call with env and con locked.
663 PlayerSAO *emergePlayer(const char *name, u16 peer_id);
665 // Locks environment and connection by its own
667 void handlePeerChange(PeerChange &c);
668 void handlePeerChanges();
675 std::string m_path_world;
676 // Path to user's configuration file ("" = no configuration file)
677 std::string m_path_config;
678 // Subgame specification
679 SubgameSpec m_gamespec;
680 // If true, do not allow multiple players and hide some multiplayer
682 bool m_simple_singleplayer_mode;
684 // Thread can set; step() will throw as ServerError
685 MutexedVariable<std::string> m_async_fatal_error;
688 float m_liquid_transform_timer;
689 float m_print_info_timer;
690 float m_objectdata_timer;
691 float m_emergethread_trigger_timer;
692 float m_savemap_timer;
693 IntervalLimiter m_map_timer_and_unload_interval;
695 // NOTE: If connection and environment are both to be locked,
696 // environment shall be locked first.
699 ServerEnvironment *m_env;
703 con::Connection m_con;
705 // Connected clients (behind the con mutex)
706 core::map<u16, RemoteClient*> m_clients;
709 BanManager m_banmanager;
712 // Envlock and conlock should be locked when using Lua
715 // Item definition manager
716 IWritableItemDefManager *m_itemdef;
718 // Node definition manager
719 IWritableNodeDefManager *m_nodedef;
721 // Craft definition manager
722 IWritableCraftDefManager *m_craftdef;
725 EventManager *m_event;
728 core::list<ModSpec> m_mods;
734 // A buffer for time steps
735 // step() increments and AsyncRunStep() run by m_thread reads it.
737 JMutex m_step_dtime_mutex;
739 // The server mainly operates in this thread
740 ServerThread m_thread;
741 // This thread fetches and generates map
742 EmergeThread m_emergethread;
743 // Queue of block coordinates to be processed by the emerge thread
744 BlockEmergeQueue m_emerge_queue;
750 // Timer for sending time of day over network
751 float m_time_of_day_send_timer;
752 // Uptime of server in seconds
753 MutexedVariable<double> m_uptime;
757 Queues stuff from peerAdded() and deletingPeer() to
771 Queue<PeerChange> m_peer_change_queue;
777 // Mod parent directory paths
778 core::list<std::string> m_modspaths;
780 bool m_shutdown_requested;
783 Map edit event queue. Automatically receives all map edits.
784 The constructor of this class registers us to receive them through
787 NOTE: Should these be moved to actually be members of
792 Queue of map edits from the environment for sending to the clients
793 This is behind m_env_mutex
795 Queue<MapEditEvent*> m_unsent_map_edit_queue;
797 Set to true when the server itself is modifying the map and does
798 all sending of information by itself.
799 This is behind m_env_mutex
801 bool m_ignore_map_edit_events;
803 If a non-empty area, map edit events contained within are left
804 unsent. Done at map generation time to speed up editing of the
805 generated area, as it will be sent anyway.
806 This is behind m_env_mutex
808 VoxelArea m_ignore_map_edit_events_area;
810 If set to !=0, the incoming MapEditEvents are modified to have
811 this peed id as the disabled recipient
812 This is behind m_env_mutex
814 u16 m_ignore_map_edit_events_peer_id;
816 friend class EmergeThread;
817 friend class RemoteClient;
819 std::map<std::string,MediaInfo> m_media;
824 std::map<s32, ServerPlayingSound> m_playing_sounds;
829 Runs a simple dedicated server loop.
831 Shuts down when run is set to false.
833 void dedicated_server_loop(Server &server, bool &run);