]> git.lizzy.rs Git - minetest.git/blob - src/server.cpp
Fix unhandled InvalidPositionException
[minetest.git] / src / server.cpp
1 /*
2 Minetest-c55
3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
4
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.
9
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.
14
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.
18 */
19
20 #include "server.h"
21 #include "utility.h"
22 #include <iostream>
23 #include <queue>
24 #include "clientserver.h"
25 #include "map.h"
26 #include "jmutexautolock.h"
27 #include "main.h"
28 #include "constants.h"
29 #include "voxel.h"
30 #include "config.h"
31 #include "servercommand.h"
32 #include "filesys.h"
33 #include "mapblock.h"
34 #include "serverobject.h"
35 #include "settings.h"
36 #include "profiler.h"
37 #include "log.h"
38 #include "script.h"
39 #include "scriptapi.h"
40 #include "nodedef.h"
41 #include "itemdef.h"
42 #include "craftdef.h"
43 #include "mapgen.h"
44 #include "content_mapnode.h"
45 #include "content_nodemeta.h"
46 #include "content_abm.h"
47 #include "content_sao.h"
48 #include "mods.h"
49 #include "sha1.h"
50 #include "base64.h"
51 #include "tool.h"
52 #include "utility_string.h"
53 #include "sound.h" // dummySoundManager
54 #include "event_manager.h"
55 #include "hex.h"
56
57 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
58
59 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
60
61 class MapEditEventIgnorer
62 {
63 public:
64         MapEditEventIgnorer(bool *flag):
65                 m_flag(flag)
66         {
67                 if(*m_flag == false)
68                         *m_flag = true;
69                 else
70                         m_flag = NULL;
71         }
72
73         ~MapEditEventIgnorer()
74         {
75                 if(m_flag)
76                 {
77                         assert(*m_flag);
78                         *m_flag = false;
79                 }
80         }
81         
82 private:
83         bool *m_flag;
84 };
85
86 class MapEditEventAreaIgnorer
87 {
88 public:
89         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
90                 m_ignorevariable(ignorevariable)
91         {
92                 if(m_ignorevariable->getVolume() == 0)
93                         *m_ignorevariable = a;
94                 else
95                         m_ignorevariable = NULL;
96         }
97
98         ~MapEditEventAreaIgnorer()
99         {
100                 if(m_ignorevariable)
101                 {
102                         assert(m_ignorevariable->getVolume() != 0);
103                         *m_ignorevariable = VoxelArea();
104                 }
105         }
106         
107 private:
108         VoxelArea *m_ignorevariable;
109 };
110
111 void * ServerThread::Thread()
112 {
113         ThreadStarted();
114
115         log_register_thread("ServerThread");
116
117         DSTACK(__FUNCTION_NAME);
118
119         BEGIN_DEBUG_EXCEPTION_HANDLER
120
121         while(getRun())
122         {
123                 try{
124                         //TimeTaker timer("AsyncRunStep() + Receive()");
125
126                         {
127                                 //TimeTaker timer("AsyncRunStep()");
128                                 m_server->AsyncRunStep();
129                         }
130                 
131                         //infostream<<"Running m_server->Receive()"<<std::endl;
132                         m_server->Receive();
133                 }
134                 catch(con::NoIncomingDataException &e)
135                 {
136                 }
137                 catch(con::PeerNotFoundException &e)
138                 {
139                         infostream<<"Server: PeerNotFoundException"<<std::endl;
140                 }
141                 catch(con::ConnectionBindFailed &e)
142                 {
143                         m_server->setAsyncFatalError(e.what());
144                 }
145                 catch(LuaError &e)
146                 {
147                         m_server->setAsyncFatalError(e.what());
148                 }
149         }
150         
151         END_DEBUG_EXCEPTION_HANDLER(errorstream)
152
153         return NULL;
154 }
155
156 void * EmergeThread::Thread()
157 {
158         ThreadStarted();
159
160         log_register_thread("EmergeThread");
161
162         DSTACK(__FUNCTION_NAME);
163
164         BEGIN_DEBUG_EXCEPTION_HANDLER
165
166         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
167         
168         /*
169                 Get block info from queue, emerge them and send them
170                 to clients.
171
172                 After queue is empty, exit.
173         */
174         while(getRun())
175         {
176                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
177                 if(qptr == NULL)
178                         break;
179                 
180                 SharedPtr<QueuedBlockEmerge> q(qptr);
181
182                 v3s16 &p = q->pos;
183                 v2s16 p2d(p.X,p.Z);
184
185                 /*
186                         Do not generate over-limit
187                 */
188                 if(blockpos_over_limit(p))
189                         continue;
190                         
191                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
192
193                 //TimeTaker timer("block emerge");
194                 
195                 /*
196                         Try to emerge it from somewhere.
197
198                         If it is only wanted as optional, only loading from disk
199                         will be allowed.
200                 */
201                 
202                 /*
203                         Check if any peer wants it as non-optional. In that case it
204                         will be generated.
205
206                         Also decrement the emerge queue count in clients.
207                 */
208
209                 bool only_from_disk = true;
210
211                 {
212                         core::map<u16, u8>::Iterator i;
213                         for(i=q->peer_ids.getIterator(); i.atEnd()==false; i++)
214                         {
215                                 //u16 peer_id = i.getNode()->getKey();
216
217                                 // Check flags
218                                 u8 flags = i.getNode()->getValue();
219                                 if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
220                                         only_from_disk = false;
221                                 
222                         }
223                 }
224                 
225                 if(enable_mapgen_debug_info)
226                         infostream<<"EmergeThread: p="
227                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
228                                         <<"only_from_disk="<<only_from_disk<<std::endl;
229                 
230                 ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
231                         
232                 MapBlock *block = NULL;
233                 bool got_block = true;
234                 core::map<v3s16, MapBlock*> modified_blocks;
235
236                 /*
237                         Try to fetch block from memory or disk.
238                         If not found and asked to generate, initialize generator.
239                 */
240                 
241                 bool started_generate = false;
242                 mapgen::BlockMakeData data;
243
244                 {
245                         JMutexAutoLock envlock(m_server->m_env_mutex);
246                         
247                         // Load sector if it isn't loaded
248                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
249                                 map.loadSectorMeta(p2d);
250                         
251                         // Attempt to load block
252                         block = map.getBlockNoCreateNoEx(p);
253                         if(!block || block->isDummy() || !block->isGenerated())
254                         {
255                                 if(enable_mapgen_debug_info)
256                                         infostream<<"EmergeThread: not in memory, "
257                                                         <<"attempting to load from disk"<<std::endl;
258
259                                 block = map.loadBlock(p);
260                         }
261                         
262                         // If could not load and allowed to generate, start generation
263                         // inside this same envlock
264                         if(only_from_disk == false &&
265                                         (block == NULL || block->isGenerated() == false)){
266                                 if(enable_mapgen_debug_info)
267                                         infostream<<"EmergeThread: generating"<<std::endl;
268                                 started_generate = true;
269
270                                 map.initBlockMake(&data, p);
271                         }
272                 }
273
274                 /*
275                         If generator was initialized, generate now when envlock is free.
276                 */
277                 if(started_generate)
278                 {
279                         {
280                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
281                                                 SPT_AVG);
282                                 TimeTaker t("mapgen::make_block()");
283
284                                 mapgen::make_block(&data);
285
286                                 if(enable_mapgen_debug_info == false)
287                                         t.stop(true); // Hide output
288                         }
289                         
290                         do{ // enable break
291                                 // Lock environment again to access the map
292                                 JMutexAutoLock envlock(m_server->m_env_mutex);
293                                 
294                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
295                                                 "mapgen::make_block (envlock)", SPT_AVG);
296
297                                 // Blit data back on map, update lighting, add mobs and
298                                 // whatever this does
299                                 map.finishBlockMake(&data, modified_blocks);
300
301                                 // Get central block
302                                 block = map.getBlockNoCreateNoEx(p);
303                                 
304                                 // If block doesn't exist, don't try doing anything with it
305                                 // This happens if the block is not in generation boundaries
306                                 if(!block)
307                                         break;
308
309                                 /*
310                                         Do some post-generate stuff
311                                 */
312
313                                 v3s16 minp = data.blockpos_min*MAP_BLOCKSIZE;
314                                 v3s16 maxp = data.blockpos_max*MAP_BLOCKSIZE +
315                                                 v3s16(1,1,1)*(MAP_BLOCKSIZE-1);
316                                 
317                                 /*
318                                         Ignore map edit events, they will not need to be
319                                         sent to anybody because the block hasn't been sent
320                                         to anybody
321                                 */
322                                 //MapEditEventIgnorer ign(&m_server->m_ignore_map_edit_events);
323                                 MapEditEventAreaIgnorer ign(
324                                                 &m_server->m_ignore_map_edit_events_area,
325                                                 VoxelArea(minp, maxp));
326                                 {
327                                         TimeTaker timer("on_generated");
328                                         scriptapi_environment_on_generated(m_server->m_lua,
329                                                         minp, maxp, mapgen::get_blockseed(data.seed, minp));
330                                         /*int t = timer.stop(true);
331                                         dstream<<"on_generated took "<<t<<"ms"<<std::endl;*/
332                                 }
333                                 
334                                 if(enable_mapgen_debug_info)
335                                         infostream<<"EmergeThread: ended up with: "
336                                                         <<analyze_block(block)<<std::endl;
337
338                                 // Activate objects and stuff
339                                 m_server->m_env->activateBlock(block, 0);
340                         }while(false);
341                 }
342
343                 if(block == NULL)
344                         got_block = false;
345                         
346                 /*
347                         Set sent status of modified blocks on clients
348                 */
349         
350                 // NOTE: Server's clients are also behind the connection mutex
351                 JMutexAutoLock lock(m_server->m_con_mutex);
352
353                 /*
354                         Add the originally fetched block to the modified list
355                 */
356                 if(got_block)
357                 {
358                         modified_blocks.insert(p, block);
359                 }
360                 
361                 /*
362                         Set the modified blocks unsent for all the clients
363                 */
364                 
365                 for(core::map<u16, RemoteClient*>::Iterator
366                                 i = m_server->m_clients.getIterator();
367                                 i.atEnd() == false; i++)
368                 {
369                         RemoteClient *client = i.getNode()->getValue();
370                         
371                         if(modified_blocks.size() > 0)
372                         {
373                                 // Remove block from sent history
374                                 client->SetBlocksNotSent(modified_blocks);
375                         }
376                 }
377                 
378         }
379
380         END_DEBUG_EXCEPTION_HANDLER(errorstream)
381
382         log_deregister_thread();
383
384         return NULL;
385 }
386
387 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
388 {
389         if(pos_exists) *pos_exists = false;
390         switch(type){
391         case SSP_LOCAL:
392                 return v3f(0,0,0);
393         case SSP_POSITIONAL:
394                 if(pos_exists) *pos_exists = true;
395                 return pos;
396         case SSP_OBJECT: {
397                 if(object == 0)
398                         return v3f(0,0,0);
399                 ServerActiveObject *sao = env->getActiveObject(object);
400                 if(!sao)
401                         return v3f(0,0,0);
402                 if(pos_exists) *pos_exists = true;
403                 return sao->getBasePosition(); }
404         }
405         return v3f(0,0,0);
406 }
407
408 void RemoteClient::GetNextBlocks(Server *server, float dtime,
409                 core::array<PrioritySortedBlockTransfer> &dest)
410 {
411         DSTACK(__FUNCTION_NAME);
412         
413         /*u32 timer_result;
414         TimeTaker timer("RemoteClient::GetNextBlocks", &timer_result);*/
415         
416         // Increment timers
417         m_nothing_to_send_pause_timer -= dtime;
418         m_nearest_unsent_reset_timer += dtime;
419         
420         if(m_nothing_to_send_pause_timer >= 0)
421         {
422                 return;
423         }
424
425         // Won't send anything if already sending
426         if(m_blocks_sending.size() >= g_settings->getU16
427                         ("max_simultaneous_block_sends_per_client"))
428         {
429                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
430                 return;
431         }
432
433         //TimeTaker timer("RemoteClient::GetNextBlocks");
434         
435         Player *player = server->m_env->getPlayer(peer_id);
436
437         assert(player != NULL);
438
439         v3f playerpos = player->getPosition();
440         v3f playerspeed = player->getSpeed();
441         v3f playerspeeddir(0,0,0);
442         if(playerspeed.getLength() > 1.0*BS)
443                 playerspeeddir = playerspeed / playerspeed.getLength();
444         // Predict to next block
445         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
446
447         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
448
449         v3s16 center = getNodeBlockPos(center_nodepos);
450         
451         // Camera position and direction
452         v3f camera_pos = player->getEyePosition();
453         v3f camera_dir = v3f(0,0,1);
454         camera_dir.rotateYZBy(player->getPitch());
455         camera_dir.rotateXZBy(player->getYaw());
456
457         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
458                         <<camera_dir.Z<<")"<<std::endl;*/
459
460         /*
461                 Get the starting value of the block finder radius.
462         */
463                 
464         if(m_last_center != center)
465         {
466                 m_nearest_unsent_d = 0;
467                 m_last_center = center;
468         }
469
470         /*infostream<<"m_nearest_unsent_reset_timer="
471                         <<m_nearest_unsent_reset_timer<<std::endl;*/
472                         
473         // Reset periodically to workaround for some bugs or stuff
474         if(m_nearest_unsent_reset_timer > 20.0)
475         {
476                 m_nearest_unsent_reset_timer = 0;
477                 m_nearest_unsent_d = 0;
478                 //infostream<<"Resetting m_nearest_unsent_d for "
479                 //              <<server->getPlayerName(peer_id)<<std::endl;
480         }
481
482         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
483         s16 d_start = m_nearest_unsent_d;
484
485         //infostream<<"d_start="<<d_start<<std::endl;
486
487         u16 max_simul_sends_setting = g_settings->getU16
488                         ("max_simultaneous_block_sends_per_client");
489         u16 max_simul_sends_usually = max_simul_sends_setting;
490
491         /*
492                 Check the time from last addNode/removeNode.
493                 
494                 Decrease send rate if player is building stuff.
495         */
496         m_time_from_building += dtime;
497         if(m_time_from_building < g_settings->getFloat(
498                                 "full_block_send_enable_min_time_from_building"))
499         {
500                 max_simul_sends_usually
501                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
502         }
503         
504         /*
505                 Number of blocks sending + number of blocks selected for sending
506         */
507         u32 num_blocks_selected = m_blocks_sending.size();
508         
509         /*
510                 next time d will be continued from the d from which the nearest
511                 unsent block was found this time.
512
513                 This is because not necessarily any of the blocks found this
514                 time are actually sent.
515         */
516         s32 new_nearest_unsent_d = -1;
517
518         s16 d_max = g_settings->getS16("max_block_send_distance");
519         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
520         
521         // Don't loop very much at a time
522         s16 max_d_increment_at_time = 2;
523         if(d_max > d_start + max_d_increment_at_time)
524                 d_max = d_start + max_d_increment_at_time;
525         /*if(d_max_gen > d_start+2)
526                 d_max_gen = d_start+2;*/
527         
528         //infostream<<"Starting from "<<d_start<<std::endl;
529
530         s32 nearest_emerged_d = -1;
531         s32 nearest_emergefull_d = -1;
532         s32 nearest_sent_d = -1;
533         bool queue_is_full = false;
534         
535         s16 d;
536         for(d = d_start; d <= d_max; d++)
537         {
538                 /*errorstream<<"checking d="<<d<<" for "
539                                 <<server->getPlayerName(peer_id)<<std::endl;*/
540                 //infostream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
541                 
542                 /*
543                         If m_nearest_unsent_d was changed by the EmergeThread
544                         (it can change it to 0 through SetBlockNotSent),
545                         update our d to it.
546                         Else update m_nearest_unsent_d
547                 */
548                 /*if(m_nearest_unsent_d != last_nearest_unsent_d)
549                 {
550                         d = m_nearest_unsent_d;
551                         last_nearest_unsent_d = m_nearest_unsent_d;
552                 }*/
553
554                 /*
555                         Get the border/face dot coordinates of a "d-radiused"
556                         box
557                 */
558                 core::list<v3s16> list;
559                 getFacePositions(list, d);
560                 
561                 core::list<v3s16>::Iterator li;
562                 for(li=list.begin(); li!=list.end(); li++)
563                 {
564                         v3s16 p = *li + center;
565                         
566                         /*
567                                 Send throttling
568                                 - Don't allow too many simultaneous transfers
569                                 - EXCEPT when the blocks are very close
570
571                                 Also, don't send blocks that are already flying.
572                         */
573                         
574                         // Start with the usual maximum
575                         u16 max_simul_dynamic = max_simul_sends_usually;
576                         
577                         // If block is very close, allow full maximum
578                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
579                                 max_simul_dynamic = max_simul_sends_setting;
580
581                         // Don't select too many blocks for sending
582                         if(num_blocks_selected >= max_simul_dynamic)
583                         {
584                                 queue_is_full = true;
585                                 goto queue_full_break;
586                         }
587                         
588                         // Don't send blocks that are currently being transferred
589                         if(m_blocks_sending.find(p) != NULL)
590                                 continue;
591                 
592                         /*
593                                 Do not go over-limit
594                         */
595                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
596                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
597                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
598                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
599                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
600                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
601                                 continue;
602                 
603                         // If this is true, inexistent block will be made from scratch
604                         bool generate = d <= d_max_gen;
605                         
606                         {
607                                 /*// Limit the generating area vertically to 2/3
608                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
609                                         generate = false;*/
610
611                                 // Limit the send area vertically to 1/2
612                                 if(abs(p.Y - center.Y) > d_max / 2)
613                                         continue;
614                         }
615
616 #if 0
617                         /*
618                                 If block is far away, don't generate it unless it is
619                                 near ground level.
620                         */
621                         if(d >= 4)
622                         {
623         #if 1
624                                 // Block center y in nodes
625                                 f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
626                                 // Don't generate if it's very high or very low
627                                 if(y < -64 || y > 64)
628                                         generate = false;
629         #endif
630         #if 0
631                                 v2s16 p2d_nodes_center(
632                                         MAP_BLOCKSIZE*p.X,
633                                         MAP_BLOCKSIZE*p.Z);
634                                 
635                                 // Get ground height in nodes
636                                 s16 gh = server->m_env->getServerMap().findGroundLevel(
637                                                 p2d_nodes_center);
638
639                                 // If differs a lot, don't generate
640                                 if(fabs(gh - y) > MAP_BLOCKSIZE*2)
641                                         generate = false;
642                                         // Actually, don't even send it
643                                         //continue;
644         #endif
645                         }
646 #endif
647
648                         //infostream<<"d="<<d<<std::endl;
649 #if 1
650                         /*
651                                 Don't generate or send if not in sight
652                                 FIXME This only works if the client uses a small enough
653                                 FOV setting. The default of 72 degrees is fine.
654                         */
655
656                         float camera_fov = (72.0*PI/180) * 4./3.;
657                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
658                         {
659                                 continue;
660                         }
661 #endif
662                         /*
663                                 Don't send already sent blocks
664                         */
665                         {
666                                 if(m_blocks_sent.find(p) != NULL)
667                                 {
668                                         continue;
669                                 }
670                         }
671
672                         /*
673                                 Check if map has this block
674                         */
675                         MapBlock *block = server->m_env->getMap().getBlockNoCreateNoEx(p);
676                         
677                         bool surely_not_found_on_disk = false;
678                         bool block_is_invalid = false;
679                         if(block != NULL)
680                         {
681                                 // Reset usage timer, this block will be of use in the future.
682                                 block->resetUsageTimer();
683
684                                 // Block is dummy if data doesn't exist.
685                                 // It means it has been not found from disk and not generated
686                                 if(block->isDummy())
687                                 {
688                                         surely_not_found_on_disk = true;
689                                 }
690                                 
691                                 // Block is valid if lighting is up-to-date and data exists
692                                 if(block->isValid() == false)
693                                 {
694                                         block_is_invalid = true;
695                                 }
696                                 
697                                 /*if(block->isFullyGenerated() == false)
698                                 {
699                                         block_is_invalid = true;
700                                 }*/
701
702 #if 0
703                                 v2s16 p2d(p.X, p.Z);
704                                 ServerMap *map = (ServerMap*)(&server->m_env->getMap());
705                                 v2s16 chunkpos = map->sector_to_chunk(p2d);
706                                 if(map->chunkNonVolatile(chunkpos) == false)
707                                         block_is_invalid = true;
708 #endif
709                                 if(block->isGenerated() == false)
710                                         block_is_invalid = true;
711 #if 1
712                                 /*
713                                         If block is not close, don't send it unless it is near
714                                         ground level.
715
716                                         Block is near ground level if night-time mesh
717                                         differs from day-time mesh.
718                                 */
719                                 if(d >= 4)
720                                 {
721                                         if(block->getDayNightDiff() == false)
722                                                 continue;
723                                 }
724 #endif
725                         }
726
727                         /*
728                                 If block has been marked to not exist on disk (dummy)
729                                 and generating new ones is not wanted, skip block.
730                         */
731                         if(generate == false && surely_not_found_on_disk == true)
732                         {
733                                 // get next one.
734                                 continue;
735                         }
736
737                         /*
738                                 Add inexistent block to emerge queue.
739                         */
740                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
741                         {
742                                 //TODO: Get value from somewhere
743                                 // Allow only one block in emerge queue
744                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
745                                 // Allow two blocks in queue per client
746                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
747                                 u32 max_emerge = 5;
748                                 // Make it more responsive when needing to generate stuff
749                                 if(surely_not_found_on_disk)
750                                         max_emerge = 1;
751                                 if(server->m_emerge_queue.peerItemCount(peer_id) < max_emerge)
752                                 {
753                                         //infostream<<"Adding block to emerge queue"<<std::endl;
754                                         
755                                         // Add it to the emerge queue and trigger the thread
756                                         
757                                         u8 flags = 0;
758                                         if(generate == false)
759                                                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
760                                         
761                                         server->m_emerge_queue.addBlock(peer_id, p, flags);
762                                         server->m_emergethread.trigger();
763
764                                         if(nearest_emerged_d == -1)
765                                                 nearest_emerged_d = d;
766                                 } else {
767                                         if(nearest_emergefull_d == -1)
768                                                 nearest_emergefull_d = d;
769                                 }
770                                 
771                                 // get next one.
772                                 continue;
773                         }
774
775                         if(nearest_sent_d == -1)
776                                 nearest_sent_d = d;
777
778                         /*
779                                 Add block to send queue
780                         */
781
782                         /*errorstream<<"sending from d="<<d<<" to "
783                                         <<server->getPlayerName(peer_id)<<std::endl;*/
784
785                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
786
787                         dest.push_back(q);
788
789                         num_blocks_selected += 1;
790                 }
791         }
792 queue_full_break:
793
794         //infostream<<"Stopped at "<<d<<std::endl;
795         
796         // If nothing was found for sending and nothing was queued for
797         // emerging, continue next time browsing from here
798         if(nearest_emerged_d != -1){
799                 new_nearest_unsent_d = nearest_emerged_d;
800         } else if(nearest_emergefull_d != -1){
801                 new_nearest_unsent_d = nearest_emergefull_d;
802         } else {
803                 if(d > g_settings->getS16("max_block_send_distance")){
804                         new_nearest_unsent_d = 0;
805                         m_nothing_to_send_pause_timer = 2.0;
806                         /*infostream<<"GetNextBlocks(): d wrapped around for "
807                                         <<server->getPlayerName(peer_id)
808                                         <<"; setting to 0 and pausing"<<std::endl;*/
809                 } else {
810                         if(nearest_sent_d != -1)
811                                 new_nearest_unsent_d = nearest_sent_d;
812                         else
813                                 new_nearest_unsent_d = d;
814                 }
815         }
816
817         if(new_nearest_unsent_d != -1)
818                 m_nearest_unsent_d = new_nearest_unsent_d;
819
820         /*timer_result = timer.stop(true);
821         if(timer_result != 0)
822                 infostream<<"GetNextBlocks duration: "<<timer_result<<" (!=0)"<<std::endl;*/
823 }
824
825 void RemoteClient::GotBlock(v3s16 p)
826 {
827         if(m_blocks_sending.find(p) != NULL)
828                 m_blocks_sending.remove(p);
829         else
830         {
831                 /*infostream<<"RemoteClient::GotBlock(): Didn't find in"
832                                 " m_blocks_sending"<<std::endl;*/
833                 m_excess_gotblocks++;
834         }
835         m_blocks_sent.insert(p, true);
836 }
837
838 void RemoteClient::SentBlock(v3s16 p)
839 {
840         if(m_blocks_sending.find(p) == NULL)
841                 m_blocks_sending.insert(p, 0.0);
842         else
843                 infostream<<"RemoteClient::SentBlock(): Sent block"
844                                 " already in m_blocks_sending"<<std::endl;
845 }
846
847 void RemoteClient::SetBlockNotSent(v3s16 p)
848 {
849         m_nearest_unsent_d = 0;
850         
851         if(m_blocks_sending.find(p) != NULL)
852                 m_blocks_sending.remove(p);
853         if(m_blocks_sent.find(p) != NULL)
854                 m_blocks_sent.remove(p);
855 }
856
857 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
858 {
859         m_nearest_unsent_d = 0;
860         
861         for(core::map<v3s16, MapBlock*>::Iterator
862                         i = blocks.getIterator();
863                         i.atEnd()==false; i++)
864         {
865                 v3s16 p = i.getNode()->getKey();
866
867                 if(m_blocks_sending.find(p) != NULL)
868                         m_blocks_sending.remove(p);
869                 if(m_blocks_sent.find(p) != NULL)
870                         m_blocks_sent.remove(p);
871         }
872 }
873
874 /*
875         PlayerInfo
876 */
877
878 PlayerInfo::PlayerInfo()
879 {
880         name[0] = 0;
881         avg_rtt = 0;
882 }
883
884 void PlayerInfo::PrintLine(std::ostream *s)
885 {
886         (*s)<<id<<": ";
887         (*s)<<"\""<<name<<"\" ("
888                         <<(position.X/10)<<","<<(position.Y/10)
889                         <<","<<(position.Z/10)<<") ";
890         address.print(s);
891         (*s)<<" avg_rtt="<<avg_rtt;
892         (*s)<<std::endl;
893 }
894
895 /*
896         Server
897 */
898
899 Server::Server(
900                 const std::string &path_world,
901                 const std::string &path_config,
902                 const SubgameSpec &gamespec,
903                 bool simple_singleplayer_mode
904         ):
905         m_path_world(path_world),
906         m_path_config(path_config),
907         m_gamespec(gamespec),
908         m_simple_singleplayer_mode(simple_singleplayer_mode),
909         m_async_fatal_error(""),
910         m_env(NULL),
911         m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
912         m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
913         m_lua(NULL),
914         m_itemdef(createItemDefManager()),
915         m_nodedef(createNodeDefManager()),
916         m_craftdef(createCraftDefManager()),
917         m_event(new EventManager()),
918         m_thread(this),
919         m_emergethread(this),
920         m_time_of_day_send_timer(0),
921         m_uptime(0),
922         m_shutdown_requested(false),
923         m_ignore_map_edit_events(false),
924         m_ignore_map_edit_events_peer_id(0)
925 {
926         m_liquid_transform_timer = 0.0;
927         m_print_info_timer = 0.0;
928         m_objectdata_timer = 0.0;
929         m_emergethread_trigger_timer = 0.0;
930         m_savemap_timer = 0.0;
931         
932         m_env_mutex.Init();
933         m_con_mutex.Init();
934         m_step_dtime_mutex.Init();
935         m_step_dtime = 0.0;
936
937         if(path_world == "")
938                 throw ServerError("Supplied empty world path");
939         
940         if(!gamespec.isValid())
941                 throw ServerError("Supplied invalid gamespec");
942         
943         infostream<<"Server created for gameid \""<<m_gamespec.id<<"\"";
944         if(m_simple_singleplayer_mode)
945                 infostream<<" in simple singleplayer mode"<<std::endl;
946         else
947                 infostream<<std::endl;
948         infostream<<"- world:  "<<m_path_world<<std::endl;
949         infostream<<"- config: "<<m_path_config<<std::endl;
950         infostream<<"- game:   "<<m_gamespec.path<<std::endl;
951
952         // Add world mod search path
953         m_modspaths.push_front(m_path_world + DIR_DELIM + "worldmods");
954         // Add addon mod search path
955         for(std::set<std::string>::const_iterator i = m_gamespec.mods_paths.begin();
956                         i != m_gamespec.mods_paths.end(); i++)
957                 m_modspaths.push_front((*i));
958
959         // Print out mod search paths
960         for(core::list<std::string>::Iterator i = m_modspaths.begin();
961                         i != m_modspaths.end(); i++){
962                 std::string modspath = *i;
963                 infostream<<"- mods:   "<<modspath<<std::endl;
964         }
965         
966         // Path to builtin.lua
967         std::string builtinpath = getBuiltinLuaPath() + DIR_DELIM + "builtin.lua";
968
969         // Create world if it doesn't exist
970         if(!initializeWorld(m_path_world, m_gamespec.id))
971                 throw ServerError("Failed to initialize world");
972
973         // Lock environment
974         JMutexAutoLock envlock(m_env_mutex);
975         JMutexAutoLock conlock(m_con_mutex);
976
977         // Initialize scripting
978         
979         infostream<<"Server: Initializing Lua"<<std::endl;
980         m_lua = script_init();
981         assert(m_lua);
982         // Export API
983         scriptapi_export(m_lua, this);
984         // Load and run builtin.lua
985         infostream<<"Server: Loading builtin.lua [\""
986                         <<builtinpath<<"\"]"<<std::endl;
987         bool success = scriptapi_loadmod(m_lua, builtinpath, "__builtin");
988         if(!success){
989                 errorstream<<"Server: Failed to load and run "
990                                 <<builtinpath<<std::endl;
991                 throw ModError("Failed to load and run "+builtinpath);
992         }
993         // Find mods in mod search paths
994         m_mods = getMods(m_modspaths);
995         // Print 'em
996         infostream<<"Server: Loading mods: ";
997         for(core::list<ModSpec>::Iterator i = m_mods.begin();
998                         i != m_mods.end(); i++){
999                 const ModSpec &mod = *i;
1000                 infostream<<mod.name<<" ";
1001         }
1002         infostream<<std::endl;
1003         // Load and run "mod" scripts
1004         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1005                         i != m_mods.end(); i++){
1006                 const ModSpec &mod = *i;
1007                 std::string scriptpath = mod.path + DIR_DELIM + "init.lua";
1008                 infostream<<"  ["<<padStringRight(mod.name, 12)<<"] [\""
1009                                 <<scriptpath<<"\"]"<<std::endl;
1010                 bool success = scriptapi_loadmod(m_lua, scriptpath, mod.name);
1011                 if(!success){
1012                         errorstream<<"Server: Failed to load and run "
1013                                         <<scriptpath<<std::endl;
1014                         throw ModError("Failed to load and run "+scriptpath);
1015                 }
1016         }
1017         
1018         // Read Textures and calculate sha1 sums
1019         fillMediaCache();
1020
1021         // Apply item aliases in the node definition manager
1022         m_nodedef->updateAliases(m_itemdef);
1023
1024         // Initialize Environment
1025         
1026         m_env = new ServerEnvironment(new ServerMap(path_world, this), m_lua,
1027                         this, this);
1028
1029         // Give environment reference to scripting api
1030         scriptapi_add_environment(m_lua, m_env);
1031         
1032         // Register us to receive map edit events
1033         m_env->getMap().addEventReceiver(this);
1034
1035         // If file exists, load environment metadata
1036         if(fs::PathExists(m_path_world+DIR_DELIM+"env_meta.txt"))
1037         {
1038                 infostream<<"Server: Loading environment metadata"<<std::endl;
1039                 m_env->loadMeta(m_path_world);
1040         }
1041
1042         // Load players
1043         infostream<<"Server: Loading players"<<std::endl;
1044         m_env->deSerializePlayers(m_path_world);
1045
1046         /*
1047                 Add some test ActiveBlockModifiers to environment
1048         */
1049         add_legacy_abms(m_env, m_nodedef);
1050 }
1051
1052 Server::~Server()
1053 {
1054         infostream<<"Server destructing"<<std::endl;
1055
1056         /*
1057                 Send shutdown message
1058         */
1059         {
1060                 JMutexAutoLock conlock(m_con_mutex);
1061                 
1062                 std::wstring line = L"*** Server shutting down";
1063
1064                 /*
1065                         Send the message to clients
1066                 */
1067                 for(core::map<u16, RemoteClient*>::Iterator
1068                         i = m_clients.getIterator();
1069                         i.atEnd() == false; i++)
1070                 {
1071                         // Get client and check that it is valid
1072                         RemoteClient *client = i.getNode()->getValue();
1073                         assert(client->peer_id == i.getNode()->getKey());
1074                         if(client->serialization_version == SER_FMT_VER_INVALID)
1075                                 continue;
1076
1077                         try{
1078                                 SendChatMessage(client->peer_id, line);
1079                         }
1080                         catch(con::PeerNotFoundException &e)
1081                         {}
1082                 }
1083         }
1084         
1085         {
1086                 JMutexAutoLock envlock(m_env_mutex);
1087
1088                 /*
1089                         Save players
1090                 */
1091                 infostream<<"Server: Saving players"<<std::endl;
1092                 m_env->serializePlayers(m_path_world);
1093
1094                 /*
1095                         Save environment metadata
1096                 */
1097                 infostream<<"Server: Saving environment metadata"<<std::endl;
1098                 m_env->saveMeta(m_path_world);
1099         }
1100                 
1101         /*
1102                 Stop threads
1103         */
1104         stop();
1105         
1106         /*
1107                 Delete clients
1108         */
1109         {
1110                 JMutexAutoLock clientslock(m_con_mutex);
1111
1112                 for(core::map<u16, RemoteClient*>::Iterator
1113                         i = m_clients.getIterator();
1114                         i.atEnd() == false; i++)
1115                 {
1116                         /*// Delete player
1117                         // NOTE: These are removed by env destructor
1118                         {
1119                                 u16 peer_id = i.getNode()->getKey();
1120                                 JMutexAutoLock envlock(m_env_mutex);
1121                                 m_env->removePlayer(peer_id);
1122                         }*/
1123                         
1124                         // Delete client
1125                         delete i.getNode()->getValue();
1126                 }
1127         }
1128         
1129         // Delete things in the reverse order of creation
1130         delete m_env;
1131         delete m_event;
1132         delete m_itemdef;
1133         delete m_nodedef;
1134         delete m_craftdef;
1135         
1136         // Deinitialize scripting
1137         infostream<<"Server: Deinitializing scripting"<<std::endl;
1138         script_deinit(m_lua);
1139 }
1140
1141 void Server::start(unsigned short port)
1142 {
1143         DSTACK(__FUNCTION_NAME);
1144         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1145
1146         // Stop thread if already running
1147         m_thread.stop();
1148         
1149         // Initialize connection
1150         m_con.SetTimeoutMs(30);
1151         m_con.Serve(port);
1152
1153         // Start thread
1154         m_thread.setRun(true);
1155         m_thread.Start();
1156         
1157         // ASCII art for the win!
1158         actionstream
1159         <<"        .__               __                   __   "<<std::endl
1160         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1161         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1162         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1163         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1164         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1165         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1166         actionstream<<"Server for gameid=\""<<m_gamespec.id
1167                         <<"\" listening on port "<<port<<"."<<std::endl;
1168 }
1169
1170 void Server::stop()
1171 {
1172         DSTACK(__FUNCTION_NAME);
1173         
1174         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1175
1176         // Stop threads (set run=false first so both start stopping)
1177         m_thread.setRun(false);
1178         m_emergethread.setRun(false);
1179         m_thread.stop();
1180         m_emergethread.stop();
1181         
1182         infostream<<"Server: Threads stopped"<<std::endl;
1183 }
1184
1185 void Server::step(float dtime)
1186 {
1187         DSTACK(__FUNCTION_NAME);
1188         // Limit a bit
1189         if(dtime > 2.0)
1190                 dtime = 2.0;
1191         {
1192                 JMutexAutoLock lock(m_step_dtime_mutex);
1193                 m_step_dtime += dtime;
1194         }
1195         // Throw if fatal error occurred in thread
1196         std::string async_err = m_async_fatal_error.get();
1197         if(async_err != ""){
1198                 throw ServerError(async_err);
1199         }
1200 }
1201
1202 void Server::AsyncRunStep()
1203 {
1204         DSTACK(__FUNCTION_NAME);
1205         
1206         g_profiler->add("Server::AsyncRunStep (num)", 1);
1207         
1208         float dtime;
1209         {
1210                 JMutexAutoLock lock1(m_step_dtime_mutex);
1211                 dtime = m_step_dtime;
1212         }
1213         
1214         {
1215                 // Send blocks to clients
1216                 SendBlocks(dtime);
1217         }
1218         
1219         if(dtime < 0.001)
1220                 return;
1221         
1222         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1223
1224         //infostream<<"Server steps "<<dtime<<std::endl;
1225         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1226         
1227         {
1228                 JMutexAutoLock lock1(m_step_dtime_mutex);
1229                 m_step_dtime -= dtime;
1230         }
1231
1232         /*
1233                 Update uptime
1234         */
1235         {
1236                 m_uptime.set(m_uptime.get() + dtime);
1237         }
1238         
1239         {
1240                 // Process connection's timeouts
1241                 JMutexAutoLock lock2(m_con_mutex);
1242                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1243                 m_con.RunTimeouts(dtime);
1244         }
1245         
1246         {
1247                 // This has to be called so that the client list gets synced
1248                 // with the peer list of the connection
1249                 handlePeerChanges();
1250         }
1251
1252         /*
1253                 Update time of day and overall game time
1254         */
1255         {
1256                 JMutexAutoLock envlock(m_env_mutex);
1257
1258                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1259
1260                 /*
1261                         Send to clients at constant intervals
1262                 */
1263
1264                 m_time_of_day_send_timer -= dtime;
1265                 if(m_time_of_day_send_timer < 0.0)
1266                 {
1267                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1268
1269                         //JMutexAutoLock envlock(m_env_mutex);
1270                         JMutexAutoLock conlock(m_con_mutex);
1271
1272                         for(core::map<u16, RemoteClient*>::Iterator
1273                                 i = m_clients.getIterator();
1274                                 i.atEnd() == false; i++)
1275                         {
1276                                 RemoteClient *client = i.getNode()->getValue();
1277                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1278                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1279                                 // Send as reliable
1280                                 m_con.Send(client->peer_id, 0, data, true);
1281                         }
1282                 }
1283         }
1284
1285         {
1286                 JMutexAutoLock lock(m_env_mutex);
1287                 // Step environment
1288                 ScopeProfiler sp(g_profiler, "SEnv step");
1289                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1290                 m_env->step(dtime);
1291         }
1292                 
1293         const float map_timer_and_unload_dtime = 2.92;
1294         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1295         {
1296                 JMutexAutoLock lock(m_env_mutex);
1297                 // Run Map's timers and unload unused data
1298                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1299                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1300                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1301         }
1302         
1303         /*
1304                 Do background stuff
1305         */
1306
1307         /*
1308                 Handle players
1309         */
1310         {
1311                 JMutexAutoLock lock(m_env_mutex);
1312                 JMutexAutoLock lock2(m_con_mutex);
1313
1314                 ScopeProfiler sp(g_profiler, "Server: handle players");
1315
1316                 for(core::map<u16, RemoteClient*>::Iterator
1317                         i = m_clients.getIterator();
1318                         i.atEnd() == false; i++)
1319                 {
1320                         RemoteClient *client = i.getNode()->getValue();
1321                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1322                         if(playersao == NULL)
1323                                 continue;
1324
1325                         /*
1326                                 Handle player HPs (die if hp=0)
1327                         */
1328                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1329                                 DiePlayer(client->peer_id);
1330
1331                         /*
1332                                 Send player inventories and HPs if necessary
1333                         */
1334                         if(playersao->m_teleported){
1335                                 SendMovePlayer(client->peer_id);
1336                                 playersao->m_teleported = false;
1337                         }
1338                         if(playersao->m_inventory_not_sent){
1339                                 UpdateCrafting(client->peer_id);
1340                                 SendInventory(client->peer_id);
1341                         }
1342                         if(playersao->m_hp_not_sent){
1343                                 SendPlayerHP(client->peer_id);
1344                         }
1345                 }
1346         }
1347         
1348         /* Transform liquids */
1349         m_liquid_transform_timer += dtime;
1350         if(m_liquid_transform_timer >= 1.00)
1351         {
1352                 m_liquid_transform_timer -= 1.00;
1353                 
1354                 JMutexAutoLock lock(m_env_mutex);
1355
1356                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1357
1358                 core::map<v3s16, MapBlock*> modified_blocks;
1359                 m_env->getMap().transformLiquids(modified_blocks);
1360 #if 0           
1361                 /*
1362                         Update lighting
1363                 */
1364                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1365                 ServerMap &map = ((ServerMap&)m_env->getMap());
1366                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1367                 
1368                 // Add blocks modified by lighting to modified_blocks
1369                 for(core::map<v3s16, MapBlock*>::Iterator
1370                                 i = lighting_modified_blocks.getIterator();
1371                                 i.atEnd() == false; i++)
1372                 {
1373                         MapBlock *block = i.getNode()->getValue();
1374                         modified_blocks.insert(block->getPos(), block);
1375                 }
1376 #endif
1377                 /*
1378                         Set the modified blocks unsent for all the clients
1379                 */
1380                 
1381                 JMutexAutoLock lock2(m_con_mutex);
1382
1383                 for(core::map<u16, RemoteClient*>::Iterator
1384                                 i = m_clients.getIterator();
1385                                 i.atEnd() == false; i++)
1386                 {
1387                         RemoteClient *client = i.getNode()->getValue();
1388                         
1389                         if(modified_blocks.size() > 0)
1390                         {
1391                                 // Remove block from sent history
1392                                 client->SetBlocksNotSent(modified_blocks);
1393                         }
1394                 }
1395         }
1396
1397         // Periodically print some info
1398         {
1399                 float &counter = m_print_info_timer;
1400                 counter += dtime;
1401                 if(counter >= 30.0)
1402                 {
1403                         counter = 0.0;
1404
1405                         JMutexAutoLock lock2(m_con_mutex);
1406                         
1407                         if(m_clients.size() != 0)
1408                                 infostream<<"Players:"<<std::endl;
1409                         for(core::map<u16, RemoteClient*>::Iterator
1410                                 i = m_clients.getIterator();
1411                                 i.atEnd() == false; i++)
1412                         {
1413                                 //u16 peer_id = i.getNode()->getKey();
1414                                 RemoteClient *client = i.getNode()->getValue();
1415                                 Player *player = m_env->getPlayer(client->peer_id);
1416                                 if(player==NULL)
1417                                         continue;
1418                                 infostream<<"* "<<player->getName()<<"\t";
1419                                 client->PrintInfo(infostream);
1420                         }
1421                 }
1422         }
1423
1424         //if(g_settings->getBool("enable_experimental"))
1425         {
1426
1427         /*
1428                 Check added and deleted active objects
1429         */
1430         {
1431                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1432                 JMutexAutoLock envlock(m_env_mutex);
1433                 JMutexAutoLock conlock(m_con_mutex);
1434
1435                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1436
1437                 // Radius inside which objects are active
1438                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1439                 radius *= MAP_BLOCKSIZE;
1440
1441                 for(core::map<u16, RemoteClient*>::Iterator
1442                         i = m_clients.getIterator();
1443                         i.atEnd() == false; i++)
1444                 {
1445                         RemoteClient *client = i.getNode()->getValue();
1446
1447                         // If definitions and textures have not been sent, don't
1448                         // send objects either
1449                         if(!client->definitions_sent)
1450                                 continue;
1451
1452                         Player *player = m_env->getPlayer(client->peer_id);
1453                         if(player==NULL)
1454                         {
1455                                 // This can happen if the client timeouts somehow
1456                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1457                                                 <<client->peer_id
1458                                                 <<" has no associated player"<<std::endl;*/
1459                                 continue;
1460                         }
1461                         v3s16 pos = floatToInt(player->getPosition(), BS);
1462
1463                         core::map<u16, bool> removed_objects;
1464                         core::map<u16, bool> added_objects;
1465                         m_env->getRemovedActiveObjects(pos, radius,
1466                                         client->m_known_objects, removed_objects);
1467                         m_env->getAddedActiveObjects(pos, radius,
1468                                         client->m_known_objects, added_objects);
1469                         
1470                         // Ignore if nothing happened
1471                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1472                         {
1473                                 //infostream<<"active objects: none changed"<<std::endl;
1474                                 continue;
1475                         }
1476                         
1477                         std::string data_buffer;
1478
1479                         char buf[4];
1480                         
1481                         // Handle removed objects
1482                         writeU16((u8*)buf, removed_objects.size());
1483                         data_buffer.append(buf, 2);
1484                         for(core::map<u16, bool>::Iterator
1485                                         i = removed_objects.getIterator();
1486                                         i.atEnd()==false; i++)
1487                         {
1488                                 // Get object
1489                                 u16 id = i.getNode()->getKey();
1490                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1491
1492                                 // Add to data buffer for sending
1493                                 writeU16((u8*)buf, i.getNode()->getKey());
1494                                 data_buffer.append(buf, 2);
1495                                 
1496                                 // Remove from known objects
1497                                 client->m_known_objects.remove(i.getNode()->getKey());
1498
1499                                 if(obj && obj->m_known_by_count > 0)
1500                                         obj->m_known_by_count--;
1501                         }
1502
1503                         // Handle added objects
1504                         writeU16((u8*)buf, added_objects.size());
1505                         data_buffer.append(buf, 2);
1506                         for(core::map<u16, bool>::Iterator
1507                                         i = added_objects.getIterator();
1508                                         i.atEnd()==false; i++)
1509                         {
1510                                 // Get object
1511                                 u16 id = i.getNode()->getKey();
1512                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1513                                 
1514                                 // Get object type
1515                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1516                                 if(obj == NULL)
1517                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1518                                                         <<": NULL object"<<std::endl;
1519                                 else
1520                                         type = obj->getSendType();
1521
1522                                 // Add to data buffer for sending
1523                                 writeU16((u8*)buf, id);
1524                                 data_buffer.append(buf, 2);
1525                                 writeU8((u8*)buf, type);
1526                                 data_buffer.append(buf, 1);
1527                                 
1528                                 if(obj)
1529                                         data_buffer.append(serializeLongString(
1530                                                         obj->getClientInitializationData()));
1531                                 else
1532                                         data_buffer.append(serializeLongString(""));
1533
1534                                 // Add to known objects
1535                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1536
1537                                 if(obj)
1538                                         obj->m_known_by_count++;
1539                         }
1540
1541                         // Send packet
1542                         SharedBuffer<u8> reply(2 + data_buffer.size());
1543                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1544                         memcpy((char*)&reply[2], data_buffer.c_str(),
1545                                         data_buffer.size());
1546                         // Send as reliable
1547                         m_con.Send(client->peer_id, 0, reply, true);
1548
1549                         verbosestream<<"Server: Sent object remove/add: "
1550                                         <<removed_objects.size()<<" removed, "
1551                                         <<added_objects.size()<<" added, "
1552                                         <<"packet size is "<<reply.getSize()<<std::endl;
1553                 }
1554
1555 #if 0
1556                 /*
1557                         Collect a list of all the objects known by the clients
1558                         and report it back to the environment.
1559                 */
1560
1561                 core::map<u16, bool> all_known_objects;
1562
1563                 for(core::map<u16, RemoteClient*>::Iterator
1564                         i = m_clients.getIterator();
1565                         i.atEnd() == false; i++)
1566                 {
1567                         RemoteClient *client = i.getNode()->getValue();
1568                         // Go through all known objects of client
1569                         for(core::map<u16, bool>::Iterator
1570                                         i = client->m_known_objects.getIterator();
1571                                         i.atEnd()==false; i++)
1572                         {
1573                                 u16 id = i.getNode()->getKey();
1574                                 all_known_objects[id] = true;
1575                         }
1576                 }
1577                 
1578                 m_env->setKnownActiveObjects(whatever);
1579 #endif
1580
1581         }
1582
1583         /*
1584                 Send object messages
1585         */
1586         {
1587                 JMutexAutoLock envlock(m_env_mutex);
1588                 JMutexAutoLock conlock(m_con_mutex);
1589
1590                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1591
1592                 // Key = object id
1593                 // Value = data sent by object
1594                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1595
1596                 // Get active object messages from environment
1597                 for(;;)
1598                 {
1599                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1600                         if(aom.id == 0)
1601                                 break;
1602                         
1603                         core::list<ActiveObjectMessage>* message_list = NULL;
1604                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1605                         n = buffered_messages.find(aom.id);
1606                         if(n == NULL)
1607                         {
1608                                 message_list = new core::list<ActiveObjectMessage>;
1609                                 buffered_messages.insert(aom.id, message_list);
1610                         }
1611                         else
1612                         {
1613                                 message_list = n->getValue();
1614                         }
1615                         message_list->push_back(aom);
1616                 }
1617                 
1618                 // Route data to every client
1619                 for(core::map<u16, RemoteClient*>::Iterator
1620                         i = m_clients.getIterator();
1621                         i.atEnd()==false; i++)
1622                 {
1623                         RemoteClient *client = i.getNode()->getValue();
1624                         std::string reliable_data;
1625                         std::string unreliable_data;
1626                         // Go through all objects in message buffer
1627                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1628                                         j = buffered_messages.getIterator();
1629                                         j.atEnd()==false; j++)
1630                         {
1631                                 // If object is not known by client, skip it
1632                                 u16 id = j.getNode()->getKey();
1633                                 if(client->m_known_objects.find(id) == NULL)
1634                                         continue;
1635                                 // Get message list of object
1636                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1637                                 // Go through every message
1638                                 for(core::list<ActiveObjectMessage>::Iterator
1639                                                 k = list->begin(); k != list->end(); k++)
1640                                 {
1641                                         // Compose the full new data with header
1642                                         ActiveObjectMessage aom = *k;
1643                                         std::string new_data;
1644                                         // Add object id
1645                                         char buf[2];
1646                                         writeU16((u8*)&buf[0], aom.id);
1647                                         new_data.append(buf, 2);
1648                                         // Add data
1649                                         new_data += serializeString(aom.datastring);
1650                                         // Add data to buffer
1651                                         if(aom.reliable)
1652                                                 reliable_data += new_data;
1653                                         else
1654                                                 unreliable_data += new_data;
1655                                 }
1656                         }
1657                         /*
1658                                 reliable_data and unreliable_data are now ready.
1659                                 Send them.
1660                         */
1661                         if(reliable_data.size() > 0)
1662                         {
1663                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1664                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1665                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1666                                                 reliable_data.size());
1667                                 // Send as reliable
1668                                 m_con.Send(client->peer_id, 0, reply, true);
1669                         }
1670                         if(unreliable_data.size() > 0)
1671                         {
1672                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1673                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1674                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1675                                                 unreliable_data.size());
1676                                 // Send as unreliable
1677                                 m_con.Send(client->peer_id, 0, reply, false);
1678                         }
1679
1680                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1681                         {
1682                                 infostream<<"Server: Size of object message data: "
1683                                                 <<"reliable: "<<reliable_data.size()
1684                                                 <<", unreliable: "<<unreliable_data.size()
1685                                                 <<std::endl;
1686                         }*/
1687                 }
1688
1689                 // Clear buffered_messages
1690                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1691                                 i = buffered_messages.getIterator();
1692                                 i.atEnd()==false; i++)
1693                 {
1694                         delete i.getNode()->getValue();
1695                 }
1696         }
1697
1698         } // enable_experimental
1699
1700         /*
1701                 Send queued-for-sending map edit events.
1702         */
1703         {
1704                 // We will be accessing the environment and the connection
1705                 JMutexAutoLock lock(m_env_mutex);
1706                 JMutexAutoLock conlock(m_con_mutex);
1707
1708                 // Don't send too many at a time
1709                 //u32 count = 0;
1710
1711                 // Single change sending is disabled if queue size is not small
1712                 bool disable_single_change_sending = false;
1713                 if(m_unsent_map_edit_queue.size() >= 4)
1714                         disable_single_change_sending = true;
1715
1716                 int event_count = m_unsent_map_edit_queue.size();
1717
1718                 // We'll log the amount of each
1719                 Profiler prof;
1720
1721                 while(m_unsent_map_edit_queue.size() != 0)
1722                 {
1723                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1724                         
1725                         // Players far away from the change are stored here.
1726                         // Instead of sending the changes, MapBlocks are set not sent
1727                         // for them.
1728                         core::list<u16> far_players;
1729
1730                         if(event->type == MEET_ADDNODE)
1731                         {
1732                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1733                                 prof.add("MEET_ADDNODE", 1);
1734                                 if(disable_single_change_sending)
1735                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1736                                                         &far_players, 5);
1737                                 else
1738                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1739                                                         &far_players, 30);
1740                         }
1741                         else if(event->type == MEET_REMOVENODE)
1742                         {
1743                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1744                                 prof.add("MEET_REMOVENODE", 1);
1745                                 if(disable_single_change_sending)
1746                                         sendRemoveNode(event->p, event->already_known_by_peer,
1747                                                         &far_players, 5);
1748                                 else
1749                                         sendRemoveNode(event->p, event->already_known_by_peer,
1750                                                         &far_players, 30);
1751                         }
1752                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1753                         {
1754                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1755                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1756                                 setBlockNotSent(event->p);
1757                         }
1758                         else if(event->type == MEET_OTHER)
1759                         {
1760                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1761                                 prof.add("MEET_OTHER", 1);
1762                                 for(core::map<v3s16, bool>::Iterator
1763                                                 i = event->modified_blocks.getIterator();
1764                                                 i.atEnd()==false; i++)
1765                                 {
1766                                         v3s16 p = i.getNode()->getKey();
1767                                         setBlockNotSent(p);
1768                                 }
1769                         }
1770                         else
1771                         {
1772                                 prof.add("unknown", 1);
1773                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1774                                                 <<((u32)event->type)<<std::endl;
1775                         }
1776                         
1777                         /*
1778                                 Set blocks not sent to far players
1779                         */
1780                         if(far_players.size() > 0)
1781                         {
1782                                 // Convert list format to that wanted by SetBlocksNotSent
1783                                 core::map<v3s16, MapBlock*> modified_blocks2;
1784                                 for(core::map<v3s16, bool>::Iterator
1785                                                 i = event->modified_blocks.getIterator();
1786                                                 i.atEnd()==false; i++)
1787                                 {
1788                                         v3s16 p = i.getNode()->getKey();
1789                                         modified_blocks2.insert(p,
1790                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1791                                 }
1792                                 // Set blocks not sent
1793                                 for(core::list<u16>::Iterator
1794                                                 i = far_players.begin();
1795                                                 i != far_players.end(); i++)
1796                                 {
1797                                         u16 peer_id = *i;
1798                                         RemoteClient *client = getClient(peer_id);
1799                                         if(client==NULL)
1800                                                 continue;
1801                                         client->SetBlocksNotSent(modified_blocks2);
1802                                 }
1803                         }
1804
1805                         delete event;
1806
1807                         /*// Don't send too many at a time
1808                         count++;
1809                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1810                                 break;*/
1811                 }
1812
1813                 if(event_count >= 5){
1814                         infostream<<"Server: MapEditEvents:"<<std::endl;
1815                         prof.print(infostream);
1816                 } else if(event_count != 0){
1817                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1818                         prof.print(verbosestream);
1819                 }
1820                 
1821         }
1822
1823         /*
1824                 Trigger emergethread (it somehow gets to a non-triggered but
1825                 bysy state sometimes)
1826         */
1827         {
1828                 float &counter = m_emergethread_trigger_timer;
1829                 counter += dtime;
1830                 if(counter >= 2.0)
1831                 {
1832                         counter = 0.0;
1833                         
1834                         m_emergethread.trigger();
1835                 }
1836         }
1837
1838         // Save map, players and auth stuff
1839         {
1840                 float &counter = m_savemap_timer;
1841                 counter += dtime;
1842                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1843                 {
1844                         counter = 0.0;
1845                         JMutexAutoLock lock(m_env_mutex);
1846
1847                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1848
1849                         //Ban stuff
1850                         if(m_banmanager.isModified())
1851                                 m_banmanager.save();
1852                         
1853                         // Save changed parts of map
1854                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1855
1856                         // Save players
1857                         m_env->serializePlayers(m_path_world);
1858                         
1859                         // Save environment metadata
1860                         m_env->saveMeta(m_path_world);
1861                 }
1862         }
1863 }
1864
1865 void Server::Receive()
1866 {
1867         DSTACK(__FUNCTION_NAME);
1868         SharedBuffer<u8> data;
1869         u16 peer_id;
1870         u32 datasize;
1871         try{
1872                 {
1873                         JMutexAutoLock conlock(m_con_mutex);
1874                         datasize = m_con.Receive(peer_id, data);
1875                 }
1876
1877                 // This has to be called so that the client list gets synced
1878                 // with the peer list of the connection
1879                 handlePeerChanges();
1880
1881                 ProcessData(*data, datasize, peer_id);
1882         }
1883         catch(con::InvalidIncomingDataException &e)
1884         {
1885                 infostream<<"Server::Receive(): "
1886                                 "InvalidIncomingDataException: what()="
1887                                 <<e.what()<<std::endl;
1888         }
1889         catch(con::PeerNotFoundException &e)
1890         {
1891                 //NOTE: This is not needed anymore
1892                 
1893                 // The peer has been disconnected.
1894                 // Find the associated player and remove it.
1895
1896                 /*JMutexAutoLock envlock(m_env_mutex);
1897
1898                 infostream<<"ServerThread: peer_id="<<peer_id
1899                                 <<" has apparently closed connection. "
1900                                 <<"Removing player."<<std::endl;
1901
1902                 m_env->removePlayer(peer_id);*/
1903         }
1904 }
1905
1906 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1907 {
1908         DSTACK(__FUNCTION_NAME);
1909         // Environment is locked first.
1910         JMutexAutoLock envlock(m_env_mutex);
1911         JMutexAutoLock conlock(m_con_mutex);
1912         
1913         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1914         
1915         try{
1916                 Address address = m_con.GetPeerAddress(peer_id);
1917                 std::string addr_s = address.serializeString();
1918
1919                 // drop player if is ip is banned
1920                 if(m_banmanager.isIpBanned(addr_s)){
1921                         infostream<<"Server: A banned client tried to connect from "
1922                                         <<addr_s<<"; banned name was "
1923                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1924                         // This actually doesn't seem to transfer to the client
1925                         SendAccessDenied(m_con, peer_id,
1926                                         L"Your ip is banned. Banned name was "
1927                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1928                         m_con.DeletePeer(peer_id);
1929                         return;
1930                 }
1931         }
1932         catch(con::PeerNotFoundException &e)
1933         {
1934                 infostream<<"Server::ProcessData(): Cancelling: peer "
1935                                 <<peer_id<<" not found"<<std::endl;
1936                 return;
1937         }
1938         
1939         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1940
1941         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1942
1943         try
1944         {
1945
1946         if(datasize < 2)
1947                 return;
1948
1949         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
1950         
1951         if(command == TOSERVER_INIT)
1952         {
1953                 // [0] u16 TOSERVER_INIT
1954                 // [2] u8 SER_FMT_VER_HIGHEST
1955                 // [3] u8[20] player_name
1956                 // [23] u8[28] password <--- can be sent without this, from old versions
1957
1958                 if(datasize < 2+1+PLAYERNAME_SIZE)
1959                         return;
1960
1961                 verbosestream<<"Server: Got TOSERVER_INIT from "
1962                                 <<peer_id<<std::endl;
1963
1964                 // First byte after command is maximum supported
1965                 // serialization version
1966                 u8 client_max = data[2];
1967                 u8 our_max = SER_FMT_VER_HIGHEST;
1968                 // Use the highest version supported by both
1969                 u8 deployed = core::min_(client_max, our_max);
1970                 // If it's lower than the lowest supported, give up.
1971                 if(deployed < SER_FMT_VER_LOWEST)
1972                         deployed = SER_FMT_VER_INVALID;
1973
1974                 //peer->serialization_version = deployed;
1975                 getClient(peer_id)->pending_serialization_version = deployed;
1976                 
1977                 if(deployed == SER_FMT_VER_INVALID)
1978                 {
1979                         actionstream<<"Server: A mismatched client tried to connect from "
1980                                         <<addr_s<<std::endl;
1981                         infostream<<"Server: Cannot negotiate "
1982                                         "serialization version with peer "
1983                                         <<peer_id<<std::endl;
1984                         SendAccessDenied(m_con, peer_id, std::wstring(
1985                                         L"Your client's version is not supported.\n"
1986                                         L"Server version is ")
1987                                         + narrow_to_wide(VERSION_STRING) + L"."
1988                         );
1989                         return;
1990                 }
1991                 
1992                 /*
1993                         Read and check network protocol version
1994                 */
1995
1996                 u16 net_proto_version = 0;
1997                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
1998                 {
1999                         net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2000                 }
2001
2002                 getClient(peer_id)->net_proto_version = net_proto_version;
2003
2004                 if(net_proto_version == 0)
2005                 {
2006                         actionstream<<"Server: An old tried to connect from "<<addr_s
2007                                         <<std::endl;
2008                         SendAccessDenied(m_con, peer_id, std::wstring(
2009                                         L"Your client's version is not supported.\n"
2010                                         L"Server version is ")
2011                                         + narrow_to_wide(VERSION_STRING) + L"."
2012                         );
2013                         return;
2014                 }
2015                 
2016                 if(g_settings->getBool("strict_protocol_version_checking"))
2017                 {
2018                         if(net_proto_version != PROTOCOL_VERSION)
2019                         {
2020                                 actionstream<<"Server: A mismatched client tried to connect"
2021                                                 <<" from "<<addr_s<<std::endl;
2022                                 SendAccessDenied(m_con, peer_id, std::wstring(
2023                                                 L"Your client's version is not supported.\n"
2024                                                 L"Server version is ")
2025                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2026                                                 + L"server's PROTOCOL_VERSION is "
2027                                                 + narrow_to_wide(itos(PROTOCOL_VERSION))
2028                                                 + L", client's PROTOCOL_VERSION is "
2029                                                 + narrow_to_wide(itos(net_proto_version))
2030                                 );
2031                                 return;
2032                         }
2033                 }
2034
2035                 /*
2036                         Set up player
2037                 */
2038                 
2039                 // Get player name
2040                 char playername[PLAYERNAME_SIZE];
2041                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2042                 {
2043                         playername[i] = data[3+i];
2044                 }
2045                 playername[PLAYERNAME_SIZE-1] = 0;
2046                 
2047                 if(playername[0]=='\0')
2048                 {
2049                         actionstream<<"Server: Player with an empty name "
2050                                         <<"tried to connect from "<<addr_s<<std::endl;
2051                         SendAccessDenied(m_con, peer_id,
2052                                         L"Empty name");
2053                         return;
2054                 }
2055
2056                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2057                 {
2058                         actionstream<<"Server: Player with an invalid name "
2059                                         <<"tried to connect from "<<addr_s<<std::endl;
2060                         SendAccessDenied(m_con, peer_id,
2061                                         L"Name contains unallowed characters");
2062                         return;
2063                 }
2064
2065                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2066                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2067
2068                 // Get password
2069                 char password[PASSWORD_SIZE];
2070                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2071                 {
2072                         // old version - assume blank password
2073                         password[0] = 0;
2074                 }
2075                 else
2076                 {
2077                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2078                         {
2079                                 password[i] = data[23+i];
2080                         }
2081                         password[PASSWORD_SIZE-1] = 0;
2082                 }
2083                 
2084                 std::string checkpwd;
2085                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2086                 
2087                 if(!has_auth){
2088                         std::wstring raw_default_password =
2089                                 narrow_to_wide(g_settings->get("default_password"));
2090                         std::string use_password =
2091                                 translatePassword(playername, raw_default_password);
2092
2093                         // If default_password is empty, allow any initial password
2094                         if (raw_default_password.length() == 0)
2095                                 use_password = password;
2096
2097                         scriptapi_create_auth(m_lua, playername, use_password);
2098                 }
2099                 
2100                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2101
2102                 if(!has_auth){
2103                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2104                         return;
2105                 }
2106
2107                 if(password != checkpwd){
2108                         infostream<<"Server: peer_id="<<peer_id
2109                                         <<": supplied invalid password for "
2110                                         <<playername<<std::endl;
2111                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2112                         return;
2113                 }
2114
2115                 // Do not allow multiple players in simple singleplayer mode.
2116                 // This isn't a perfect way to do it, but will suffice for now.
2117                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2118                         infostream<<"Server: Not allowing another client to connect in"
2119                                         <<" simple singleplayer mode"<<std::endl;
2120                         SendAccessDenied(m_con, peer_id,
2121                                         L"Running in simple singleplayer mode.");
2122                         return;
2123                 }
2124                 
2125                 // Enforce user limit.
2126                 // Don't enforce for users that have some admin right
2127                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2128                                 !checkPriv(playername, "server") &&
2129                                 !checkPriv(playername, "ban") &&
2130                                 !checkPriv(playername, "privs") &&
2131                                 !checkPriv(playername, "password") &&
2132                                 playername != g_settings->get("name"))
2133                 {
2134                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2135                                         <<" are already max_users="
2136                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2137                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2138                         return;
2139                 }
2140
2141                 // Get player
2142                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2143
2144                 // If failed, cancel
2145                 if(playersao == NULL)
2146                 {
2147                         errorstream<<"Server: peer_id="<<peer_id
2148                                         <<": failed to emerge player"<<std::endl;
2149                         return;
2150                 }
2151
2152                 /*
2153                         Answer with a TOCLIENT_INIT
2154                 */
2155                 {
2156                         SharedBuffer<u8> reply(2+1+6+8);
2157                         writeU16(&reply[0], TOCLIENT_INIT);
2158                         writeU8(&reply[2], deployed);
2159                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2160                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2161                         
2162                         // Send as reliable
2163                         m_con.Send(peer_id, 0, reply, true);
2164                 }
2165
2166                 /*
2167                         Send complete position information
2168                 */
2169                 SendMovePlayer(peer_id);
2170
2171                 return;
2172         }
2173
2174         if(command == TOSERVER_INIT2)
2175         {
2176                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2177                                 <<peer_id<<std::endl;
2178
2179
2180                 getClient(peer_id)->serialization_version
2181                                 = getClient(peer_id)->pending_serialization_version;
2182
2183                 /*
2184                         Send some initialization data
2185                 */
2186
2187                 infostream<<"Server: Sending content to "
2188                                 <<getPlayerName(peer_id)<<std::endl;
2189
2190                 // Send item definitions
2191                 SendItemDef(m_con, peer_id, m_itemdef);
2192                 
2193                 // Send node definitions
2194                 SendNodeDef(m_con, peer_id, m_nodedef);
2195                 
2196                 // Send media announcement
2197                 sendMediaAnnouncement(peer_id);
2198                 
2199                 // Send privileges
2200                 SendPlayerPrivileges(peer_id);
2201                 
2202                 // Send inventory
2203                 UpdateCrafting(peer_id);
2204                 SendInventory(peer_id);
2205                 
2206                 Player *player = m_env->getPlayer(peer_id);
2207
2208                 // Send HP
2209                 SendPlayerHP(peer_id);
2210                 
2211                 // Show death screen if necessary
2212                 if(player->hp == 0)
2213                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2214
2215                 // Send time of day
2216                 {
2217                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2218                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2219                         m_con.Send(peer_id, 0, data, true);
2220                 }
2221                 
2222                 // Note things in chat if not in simple singleplayer mode
2223                 if(!m_simple_singleplayer_mode)
2224                 {
2225                         // Send information about server to player in chat
2226                         SendChatMessage(peer_id, getStatusString());
2227                         
2228                         // Send information about joining in chat
2229                         {
2230                                 std::wstring name = L"unknown";
2231                                 Player *player = m_env->getPlayer(peer_id);
2232                                 if(player != NULL)
2233                                         name = narrow_to_wide(player->getName());
2234                                 
2235                                 std::wstring message;
2236                                 message += L"*** ";
2237                                 message += name;
2238                                 message += L" joined game";
2239                                 BroadcastChatMessage(message);
2240                         }
2241                 }
2242                 
2243                 // Warnings about protocol version can be issued here
2244                 if(getClient(peer_id)->net_proto_version < PROTOCOL_VERSION)
2245                 {
2246                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT IS OLD AND MAY WORK PROPERLY WITH THIS SERVER");
2247                 }
2248
2249                 /*
2250                         Print out action
2251                 */
2252                 {
2253                         std::ostringstream os(std::ios_base::binary);
2254                         for(core::map<u16, RemoteClient*>::Iterator
2255                                 i = m_clients.getIterator();
2256                                 i.atEnd() == false; i++)
2257                         {
2258                                 RemoteClient *client = i.getNode()->getValue();
2259                                 assert(client->peer_id == i.getNode()->getKey());
2260                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2261                                         continue;
2262                                 // Get player
2263                                 Player *player = m_env->getPlayer(client->peer_id);
2264                                 if(!player)
2265                                         continue;
2266                                 // Get name of player
2267                                 os<<player->getName()<<" ";
2268                         }
2269
2270                         actionstream<<player->getName()<<" joins game. List of players: "
2271                                         <<os.str()<<std::endl;
2272                 }
2273
2274                 return;
2275         }
2276
2277         if(peer_ser_ver == SER_FMT_VER_INVALID)
2278         {
2279                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2280                                 " serialization format invalid or not initialized."
2281                                 " Skipping incoming command="<<command<<std::endl;
2282                 return;
2283         }
2284         
2285         Player *player = m_env->getPlayer(peer_id);
2286         if(player == NULL){
2287                 infostream<<"Server::ProcessData(): Cancelling: "
2288                                 "No player for peer_id="<<peer_id
2289                                 <<std::endl;
2290                 return;
2291         }
2292
2293         PlayerSAO *playersao = player->getPlayerSAO();
2294         if(playersao == NULL){
2295                 infostream<<"Server::ProcessData(): Cancelling: "
2296                                 "No player object for peer_id="<<peer_id
2297                                 <<std::endl;
2298                 return;
2299         }
2300
2301         if(command == TOSERVER_PLAYERPOS)
2302         {
2303                 if(datasize < 2+12+12+4+4)
2304                         return;
2305         
2306                 u32 start = 0;
2307                 v3s32 ps = readV3S32(&data[start+2]);
2308                 v3s32 ss = readV3S32(&data[start+2+12]);
2309                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2310                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2311                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2312                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2313                 pitch = wrapDegrees(pitch);
2314                 yaw = wrapDegrees(yaw);
2315
2316                 player->setPosition(position);
2317                 player->setSpeed(speed);
2318                 player->setPitch(pitch);
2319                 player->setYaw(yaw);
2320                 
2321                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2322                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2323                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2324         }
2325         else if(command == TOSERVER_GOTBLOCKS)
2326         {
2327                 if(datasize < 2+1)
2328                         return;
2329                 
2330                 /*
2331                         [0] u16 command
2332                         [2] u8 count
2333                         [3] v3s16 pos_0
2334                         [3+6] v3s16 pos_1
2335                         ...
2336                 */
2337
2338                 u16 count = data[2];
2339                 for(u16 i=0; i<count; i++)
2340                 {
2341                         if((s16)datasize < 2+1+(i+1)*6)
2342                                 throw con::InvalidIncomingDataException
2343                                         ("GOTBLOCKS length is too short");
2344                         v3s16 p = readV3S16(&data[2+1+i*6]);
2345                         /*infostream<<"Server: GOTBLOCKS ("
2346                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2347                         RemoteClient *client = getClient(peer_id);
2348                         client->GotBlock(p);
2349                 }
2350         }
2351         else if(command == TOSERVER_DELETEDBLOCKS)
2352         {
2353                 if(datasize < 2+1)
2354                         return;
2355                 
2356                 /*
2357                         [0] u16 command
2358                         [2] u8 count
2359                         [3] v3s16 pos_0
2360                         [3+6] v3s16 pos_1
2361                         ...
2362                 */
2363
2364                 u16 count = data[2];
2365                 for(u16 i=0; i<count; i++)
2366                 {
2367                         if((s16)datasize < 2+1+(i+1)*6)
2368                                 throw con::InvalidIncomingDataException
2369                                         ("DELETEDBLOCKS length is too short");
2370                         v3s16 p = readV3S16(&data[2+1+i*6]);
2371                         /*infostream<<"Server: DELETEDBLOCKS ("
2372                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2373                         RemoteClient *client = getClient(peer_id);
2374                         client->SetBlockNotSent(p);
2375                 }
2376         }
2377         else if(command == TOSERVER_CLICK_OBJECT)
2378         {
2379                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2380                 return;
2381         }
2382         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2383         {
2384                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2385                 return;
2386         }
2387         else if(command == TOSERVER_GROUND_ACTION)
2388         {
2389                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2390                 return;
2391
2392         }
2393         else if(command == TOSERVER_RELEASE)
2394         {
2395                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2396                 return;
2397         }
2398         else if(command == TOSERVER_SIGNTEXT)
2399         {
2400                 infostream<<"Server: SIGNTEXT not supported anymore"
2401                                 <<std::endl;
2402                 return;
2403         }
2404         else if(command == TOSERVER_SIGNNODETEXT)
2405         {
2406                 if(!checkPriv(player->getName(), "interact"))
2407                         return;
2408                 /*
2409                         u16 command
2410                         v3s16 p
2411                         u16 textlen
2412                         textdata
2413                 */
2414                 std::string datastring((char*)&data[2], datasize-2);
2415                 std::istringstream is(datastring, std::ios_base::binary);
2416                 u8 buf[6];
2417                 // Read stuff
2418                 is.read((char*)buf, 6);
2419                 v3s16 p = readV3S16(buf);
2420                 is.read((char*)buf, 2);
2421                 u16 textlen = readU16(buf);
2422                 std::string text;
2423                 for(u16 i=0; i<textlen; i++)
2424                 {
2425                         is.read((char*)buf, 1);
2426                         text += (char)buf[0];
2427                 }
2428
2429                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(p);
2430                 if(!meta)
2431                         return;
2432
2433                 meta->setText(text);
2434                 
2435                 actionstream<<player->getName()<<" writes \""<<text<<"\" to sign"
2436                                 <<" at "<<PP(p)<<std::endl;
2437                                 
2438                 v3s16 blockpos = getNodeBlockPos(p);
2439                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
2440                 if(block)
2441                 {
2442                         block->raiseModified(MOD_STATE_WRITE_NEEDED,
2443                                         "sign node text");
2444                 }
2445
2446                 setBlockNotSent(blockpos);
2447         }
2448         else if(command == TOSERVER_INVENTORY_ACTION)
2449         {
2450                 // Strip command and create a stream
2451                 std::string datastring((char*)&data[2], datasize-2);
2452                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2453                 std::istringstream is(datastring, std::ios_base::binary);
2454                 // Create an action
2455                 InventoryAction *a = InventoryAction::deSerialize(is);
2456                 if(a == NULL)
2457                 {
2458                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2459                                         <<"InventoryAction::deSerialize() returned NULL"
2460                                         <<std::endl;
2461                         return;
2462                 }
2463
2464                 /*
2465                         Note: Always set inventory not sent, to repair cases
2466                         where the client made a bad prediction.
2467                 */
2468
2469                 /*
2470                         Handle restrictions and special cases of the move action
2471                 */
2472                 if(a->getType() == IACTION_MOVE)
2473                 {
2474                         IMoveAction *ma = (IMoveAction*)a;
2475
2476                         ma->from_inv.applyCurrentPlayer(player->getName());
2477                         ma->to_inv.applyCurrentPlayer(player->getName());
2478
2479                         setInventoryModified(ma->from_inv);
2480                         setInventoryModified(ma->to_inv);
2481
2482                         bool from_inv_is_current_player =
2483                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2484                                 (ma->from_inv.name == player->getName());
2485
2486                         bool to_inv_is_current_player =
2487                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2488                                 (ma->to_inv.name == player->getName());
2489
2490                         /*
2491                                 Disable moving items out of craftpreview
2492                         */
2493                         if(ma->from_list == "craftpreview")
2494                         {
2495                                 infostream<<"Ignoring IMoveAction from "
2496                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2497                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2498                                                 <<" because src is "<<ma->from_list<<std::endl;
2499                                 delete a;
2500                                 return;
2501                         }
2502
2503                         /*
2504                                 Disable moving items into craftresult and craftpreview
2505                         */
2506                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2507                         {
2508                                 infostream<<"Ignoring IMoveAction from "
2509                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2510                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2511                                                 <<" because dst is "<<ma->to_list<<std::endl;
2512                                 delete a;
2513                                 return;
2514                         }
2515
2516                         // Disallow moving items in elsewhere than player's inventory
2517                         // if not allowed to interact
2518                         if(!checkPriv(player->getName(), "interact") &&
2519                                         (!from_inv_is_current_player ||
2520                                         !to_inv_is_current_player))
2521                         {
2522                                 infostream<<"Cannot move outside of player's inventory: "
2523                                                 <<"No interact privilege"<<std::endl;
2524                                 delete a;
2525                                 return;
2526                         }
2527
2528                         // If player is not an admin, check for ownership of src and dst
2529                         if(!checkPriv(player->getName(), "server"))
2530                         {
2531                                 std::string owner_from = getInventoryOwner(ma->from_inv);
2532                                 if(owner_from != "" && owner_from != player->getName())
2533                                 {
2534                                         infostream<<"WARNING: "<<player->getName()
2535                                                 <<" tried to access an inventory that"
2536                                                 <<" belongs to "<<owner_from<<std::endl;
2537                                         delete a;
2538                                         return;
2539                                 }
2540
2541                                 std::string owner_to = getInventoryOwner(ma->to_inv);
2542                                 if(owner_to != "" && owner_to != player->getName())
2543                                 {
2544                                         infostream<<"WARNING: "<<player->getName()
2545                                                 <<" tried to access an inventory that"
2546                                                 <<" belongs to "<<owner_to<<std::endl;
2547                                         delete a;
2548                                         return;
2549                                 }
2550                         }
2551                 }
2552                 /*
2553                         Handle restrictions and special cases of the drop action
2554                 */
2555                 else if(a->getType() == IACTION_DROP)
2556                 {
2557                         IDropAction *da = (IDropAction*)a;
2558
2559                         da->from_inv.applyCurrentPlayer(player->getName());
2560
2561                         setInventoryModified(da->from_inv);
2562
2563                         // Disallow dropping items if not allowed to interact
2564                         if(!checkPriv(player->getName(), "interact"))
2565                         {
2566                                 delete a;
2567                                 return;
2568                         }
2569                         // If player is not an admin, check for ownership
2570                         else if(!checkPriv(player->getName(), "server"))
2571                         {
2572                                 std::string owner_from = getInventoryOwner(da->from_inv);
2573                                 if(owner_from != "" && owner_from != player->getName())
2574                                 {
2575                                         infostream<<"WARNING: "<<player->getName()
2576                                                 <<" tried to access an inventory that"
2577                                                 <<" belongs to "<<owner_from<<std::endl;
2578                                         delete a;
2579                                         return;
2580                                 }
2581                         }
2582                 }
2583                 /*
2584                         Handle restrictions and special cases of the craft action
2585                 */
2586                 else if(a->getType() == IACTION_CRAFT)
2587                 {
2588                         ICraftAction *ca = (ICraftAction*)a;
2589
2590                         ca->craft_inv.applyCurrentPlayer(player->getName());
2591
2592                         setInventoryModified(ca->craft_inv);
2593
2594                         //bool craft_inv_is_current_player =
2595                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2596                         //      (ca->craft_inv.name == player->getName());
2597
2598                         // Disallow crafting if not allowed to interact
2599                         if(!checkPriv(player->getName(), "interact"))
2600                         {
2601                                 infostream<<"Cannot craft: "
2602                                                 <<"No interact privilege"<<std::endl;
2603                                 delete a;
2604                                 return;
2605                         }
2606
2607                         // If player is not an admin, check for ownership of inventory
2608                         if(!checkPriv(player->getName(), "server"))
2609                         {
2610                                 std::string owner_craft = getInventoryOwner(ca->craft_inv);
2611                                 if(owner_craft != "" && owner_craft != player->getName())
2612                                 {
2613                                         infostream<<"WARNING: "<<player->getName()
2614                                                 <<" tried to access an inventory that"
2615                                                 <<" belongs to "<<owner_craft<<std::endl;
2616                                         delete a;
2617                                         return;
2618                                 }
2619                         }
2620                 }
2621                 
2622                 // Do the action
2623                 a->apply(this, playersao, this);
2624                 // Eat the action
2625                 delete a;
2626         }
2627         else if(command == TOSERVER_CHAT_MESSAGE)
2628         {
2629                 /*
2630                         u16 command
2631                         u16 length
2632                         wstring message
2633                 */
2634                 u8 buf[6];
2635                 std::string datastring((char*)&data[2], datasize-2);
2636                 std::istringstream is(datastring, std::ios_base::binary);
2637                 
2638                 // Read stuff
2639                 is.read((char*)buf, 2);
2640                 u16 len = readU16(buf);
2641                 
2642                 std::wstring message;
2643                 for(u16 i=0; i<len; i++)
2644                 {
2645                         is.read((char*)buf, 2);
2646                         message += (wchar_t)readU16(buf);
2647                 }
2648
2649                 // Get player name of this client
2650                 std::wstring name = narrow_to_wide(player->getName());
2651                 
2652                 // Run script hook
2653                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2654                                 wide_to_narrow(message));
2655                 // If script ate the message, don't proceed
2656                 if(ate)
2657                         return;
2658                 
2659                 // Line to send to players
2660                 std::wstring line;
2661                 // Whether to send to the player that sent the line
2662                 bool send_to_sender = false;
2663                 // Whether to send to other players
2664                 bool send_to_others = false;
2665                 
2666                 // Parse commands
2667                 if(message[0] == L'/')
2668                 {
2669                         size_t strip_size = 1;
2670                         if (message[1] == L'#') // support old-style commans
2671                                 ++strip_size;
2672                         message = message.substr(strip_size);
2673
2674                         WStrfnd f1(message);
2675                         f1.next(L" "); // Skip over /#whatever
2676                         std::wstring paramstring = f1.next(L"");
2677
2678                         ServerCommandContext *ctx = new ServerCommandContext(
2679                                 str_split(message, L' '),
2680                                 paramstring,
2681                                 this,
2682                                 m_env,
2683                                 player);
2684
2685                         std::wstring reply(processServerCommand(ctx));
2686                         send_to_sender = ctx->flags & SEND_TO_SENDER;
2687                         send_to_others = ctx->flags & SEND_TO_OTHERS;
2688
2689                         if (ctx->flags & SEND_NO_PREFIX)
2690                                 line += reply;
2691                         else
2692                                 line += L"Server: " + reply;
2693
2694                         delete ctx;
2695
2696                 }
2697                 else
2698                 {
2699                         if(checkPriv(player->getName(), "shout")){
2700                                 line += L"<";
2701                                 line += name;
2702                                 line += L"> ";
2703                                 line += message;
2704                                 send_to_others = true;
2705                         } else {
2706                                 line += L"Server: You are not allowed to shout";
2707                                 send_to_sender = true;
2708                         }
2709                 }
2710                 
2711                 if(line != L"")
2712                 {
2713                         if(send_to_others)
2714                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2715
2716                         /*
2717                                 Send the message to clients
2718                         */
2719                         for(core::map<u16, RemoteClient*>::Iterator
2720                                 i = m_clients.getIterator();
2721                                 i.atEnd() == false; i++)
2722                         {
2723                                 // Get client and check that it is valid
2724                                 RemoteClient *client = i.getNode()->getValue();
2725                                 assert(client->peer_id == i.getNode()->getKey());
2726                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2727                                         continue;
2728
2729                                 // Filter recipient
2730                                 bool sender_selected = (peer_id == client->peer_id);
2731                                 if(sender_selected == true && send_to_sender == false)
2732                                         continue;
2733                                 if(sender_selected == false && send_to_others == false)
2734                                         continue;
2735
2736                                 SendChatMessage(client->peer_id, line);
2737                         }
2738                 }
2739         }
2740         else if(command == TOSERVER_DAMAGE)
2741         {
2742                 std::string datastring((char*)&data[2], datasize-2);
2743                 std::istringstream is(datastring, std::ios_base::binary);
2744                 u8 damage = readU8(is);
2745
2746                 actionstream<<player->getName()<<" damaged by "
2747                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2748                                 <<std::endl;
2749
2750                 playersao->setHP(playersao->getHP() - damage);
2751
2752                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2753                         DiePlayer(peer_id);
2754
2755                 if(playersao->m_hp_not_sent)
2756                         SendPlayerHP(peer_id);
2757         }
2758         else if(command == TOSERVER_PASSWORD)
2759         {
2760                 /*
2761                         [0] u16 TOSERVER_PASSWORD
2762                         [2] u8[28] old password
2763                         [30] u8[28] new password
2764                 */
2765
2766                 if(datasize != 2+PASSWORD_SIZE*2)
2767                         return;
2768                 /*char password[PASSWORD_SIZE];
2769                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2770                         password[i] = data[2+i];
2771                 password[PASSWORD_SIZE-1] = 0;*/
2772                 std::string oldpwd;
2773                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2774                 {
2775                         char c = data[2+i];
2776                         if(c == 0)
2777                                 break;
2778                         oldpwd += c;
2779                 }
2780                 std::string newpwd;
2781                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2782                 {
2783                         char c = data[2+PASSWORD_SIZE+i];
2784                         if(c == 0)
2785                                 break;
2786                         newpwd += c;
2787                 }
2788
2789                 infostream<<"Server: Client requests a password change from "
2790                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2791
2792                 std::string playername = player->getName();
2793
2794                 std::string checkpwd;
2795                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2796
2797                 if(oldpwd != checkpwd)
2798                 {
2799                         infostream<<"Server: invalid old password"<<std::endl;
2800                         // Wrong old password supplied!!
2801                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2802                         return;
2803                 }
2804
2805                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2806                 if(success){
2807                         actionstream<<player->getName()<<" changes password"<<std::endl;
2808                         SendChatMessage(peer_id, L"Password change successful");
2809                 } else {
2810                         actionstream<<player->getName()<<" tries to change password but "
2811                                         <<"it fails"<<std::endl;
2812                         SendChatMessage(peer_id, L"Password change failed or inavailable");
2813                 }
2814         }
2815         else if(command == TOSERVER_PLAYERITEM)
2816         {
2817                 if (datasize < 2+2)
2818                         return;
2819
2820                 u16 item = readU16(&data[2]);
2821                 playersao->setWieldIndex(item);
2822         }
2823         else if(command == TOSERVER_RESPAWN)
2824         {
2825                 if(player->hp != 0)
2826                         return;
2827                 
2828                 RespawnPlayer(peer_id);
2829                 
2830                 actionstream<<player->getName()<<" respawns at "
2831                                 <<PP(player->getPosition()/BS)<<std::endl;
2832
2833                 // ActiveObject is added to environment in AsyncRunStep after
2834                 // the previous addition has been succesfully removed
2835         }
2836         else if(command == TOSERVER_REQUEST_MEDIA) {
2837                 std::string datastring((char*)&data[2], datasize-2);
2838                 std::istringstream is(datastring, std::ios_base::binary);
2839                 
2840                 core::list<MediaRequest> tosend;
2841                 u16 numfiles = readU16(is);
2842
2843                 infostream<<"Sending "<<numfiles<<" files to "
2844                                 <<getPlayerName(peer_id)<<std::endl;
2845                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2846
2847                 for(int i = 0; i < numfiles; i++) {
2848                         std::string name = deSerializeString(is);
2849                         tosend.push_back(MediaRequest(name));
2850                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2851                                         <<name<<std::endl;
2852                 }
2853
2854                 sendRequestedMedia(peer_id, tosend);
2855
2856                 // Now the client should know about everything
2857                 // (definitions and files)
2858                 getClient(peer_id)->definitions_sent = true;
2859         }
2860         else if(command == TOSERVER_INTERACT)
2861         {
2862                 std::string datastring((char*)&data[2], datasize-2);
2863                 std::istringstream is(datastring, std::ios_base::binary);
2864
2865                 /*
2866                         [0] u16 command
2867                         [2] u8 action
2868                         [3] u16 item
2869                         [5] u32 length of the next item
2870                         [9] serialized PointedThing
2871                         actions:
2872                         0: start digging (from undersurface) or use
2873                         1: stop digging (all parameters ignored)
2874                         2: digging completed
2875                         3: place block or item (to abovesurface)
2876                         4: use item
2877                 */
2878                 u8 action = readU8(is);
2879                 u16 item_i = readU16(is);
2880                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2881                 PointedThing pointed;
2882                 pointed.deSerialize(tmp_is);
2883
2884                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2885                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2886
2887                 if(player->hp == 0)
2888                 {
2889                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2890                                 <<" tried to interact, but is dead!"<<std::endl;
2891                         return;
2892                 }
2893
2894                 v3f player_pos = playersao->getLastGoodPosition();
2895
2896                 // Update wielded item
2897                 playersao->setWieldIndex(item_i);
2898
2899                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2900                 v3s16 p_under = pointed.node_undersurface;
2901                 v3s16 p_above = pointed.node_abovesurface;
2902
2903                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2904                 ServerActiveObject *pointed_object = NULL;
2905                 if(pointed.type == POINTEDTHING_OBJECT)
2906                 {
2907                         pointed_object = m_env->getActiveObject(pointed.object_id);
2908                         if(pointed_object == NULL)
2909                         {
2910                                 verbosestream<<"TOSERVER_INTERACT: "
2911                                         "pointed object is NULL"<<std::endl;
2912                                 return;
2913                         }
2914
2915                 }
2916
2917                 v3f pointed_pos_under = player_pos;
2918                 v3f pointed_pos_above = player_pos;
2919                 if(pointed.type == POINTEDTHING_NODE)
2920                 {
2921                         pointed_pos_under = intToFloat(p_under, BS);
2922                         pointed_pos_above = intToFloat(p_above, BS);
2923                 }
2924                 else if(pointed.type == POINTEDTHING_OBJECT)
2925                 {
2926                         pointed_pos_under = pointed_object->getBasePosition();
2927                         pointed_pos_above = pointed_pos_under;
2928                 }
2929
2930                 /*
2931                         Check that target is reasonably close
2932                         (only when digging or placing things)
2933                 */
2934                 if(action == 0 || action == 2 || action == 3)
2935                 {
2936                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2937                         float max_d = BS * 14; // Just some large enough value
2938                         if(d > max_d){
2939                                 actionstream<<"Player "<<player->getName()
2940                                                 <<" tried to access "<<pointed.dump()
2941                                                 <<" from too far: "
2942                                                 <<"d="<<d<<", max_d="<<max_d
2943                                                 <<". ignoring."<<std::endl;
2944                                 // Re-send block to revert change on client-side
2945                                 RemoteClient *client = getClient(peer_id);
2946                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2947                                 client->SetBlockNotSent(blockpos);
2948                                 // Do nothing else
2949                                 return;
2950                         }
2951                 }
2952
2953                 /*
2954                         Make sure the player is allowed to do it
2955                 */
2956                 if(!checkPriv(player->getName(), "interact"))
2957                 {
2958                         actionstream<<player->getName()<<" attempted to interact with "
2959                                         <<pointed.dump()<<" without 'interact' privilege"
2960                                         <<std::endl;
2961                         // Re-send block to revert change on client-side
2962                         RemoteClient *client = getClient(peer_id);
2963                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2964                         client->SetBlockNotSent(blockpos);
2965                         return;
2966                 }
2967
2968                 /*
2969                         0: start digging or punch object
2970                 */
2971                 if(action == 0)
2972                 {
2973                         if(pointed.type == POINTEDTHING_NODE)
2974                         {
2975                                 /*
2976                                         NOTE: This can be used in the future to check if
2977                                         somebody is cheating, by checking the timing.
2978                                 */
2979                                 MapNode n(CONTENT_IGNORE);
2980                                 try
2981                                 {
2982                                         n = m_env->getMap().getNode(p_under);
2983                                 }
2984                                 catch(InvalidPositionException &e)
2985                                 {
2986                                         infostream<<"Server: Not punching: Node not found."
2987                                                         <<" Adding block to emerge queue."
2988                                                         <<std::endl;
2989                                         m_emerge_queue.addBlock(peer_id,
2990                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
2991                                 }
2992                                 if(n.getContent() != CONTENT_IGNORE)
2993                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
2994                         }
2995                         else if(pointed.type == POINTEDTHING_OBJECT)
2996                         {
2997                                 // Skip if object has been removed
2998                                 if(pointed_object->m_removed)
2999                                         return;
3000
3001                                 actionstream<<player->getName()<<" punches object "
3002                                                 <<pointed.object_id<<": "
3003                                                 <<pointed_object->getDescription()<<std::endl;
3004
3005                                 ItemStack punchitem = playersao->getWieldedItem();
3006                                 ToolCapabilities toolcap =
3007                                                 punchitem.getToolCapabilities(m_itemdef);
3008                                 v3f dir = (pointed_object->getBasePosition() -
3009                                                 (player->getPosition() + player->getEyeOffset())
3010                                                         ).normalize();
3011                                 float time_from_last_punch =
3012                                         playersao->resetTimeFromLastPunch();
3013                                 pointed_object->punch(dir, &toolcap, playersao,
3014                                                 time_from_last_punch);
3015                         }
3016
3017                 } // action == 0
3018
3019                 /*
3020                         1: stop digging
3021                 */
3022                 else if(action == 1)
3023                 {
3024                 } // action == 1
3025
3026                 /*
3027                         2: Digging completed
3028                 */
3029                 else if(action == 2)
3030                 {
3031                         // Only complete digging of nodes
3032                         if(pointed.type == POINTEDTHING_NODE)
3033                         {
3034                                 MapNode n(CONTENT_IGNORE);
3035                                 try
3036                                 {
3037                                         n = m_env->getMap().getNode(p_under);
3038                                 }
3039                                 catch(InvalidPositionException &e)
3040                                 {
3041                                         infostream<<"Server: Not finishing digging: Node not found."
3042                                                         <<" Adding block to emerge queue."
3043                                                         <<std::endl;
3044                                         m_emerge_queue.addBlock(peer_id,
3045                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3046                                 }
3047                                 if(n.getContent() != CONTENT_IGNORE)
3048                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3049
3050                                 if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3051                                 {
3052                                         // Re-send block to revert change on client-side
3053                                         RemoteClient *client = getClient(peer_id);
3054                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3055                                         client->SetBlockNotSent(blockpos);
3056                                 }
3057                         }
3058                 } // action == 2
3059                 
3060                 /*
3061                         3: place block or right-click object
3062                 */
3063                 else if(action == 3)
3064                 {
3065                         ItemStack item = playersao->getWieldedItem();
3066
3067                         // Reset build time counter
3068                         if(pointed.type == POINTEDTHING_NODE &&
3069                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3070                                 getClient(peer_id)->m_time_from_building = 0.0;
3071
3072                         if(pointed.type == POINTEDTHING_OBJECT)
3073                         {
3074                                 // Right click object
3075
3076                                 // Skip if object has been removed
3077                                 if(pointed_object->m_removed)
3078                                         return;
3079
3080                                 actionstream<<player->getName()<<" right-clicks object "
3081                                                 <<pointed.object_id<<": "
3082                                                 <<pointed_object->getDescription()<<std::endl;
3083
3084                                 // Do stuff
3085                                 pointed_object->rightClick(playersao);
3086                         }
3087                         else if(scriptapi_item_on_place(m_lua,
3088                                         item, playersao, pointed))
3089                         {
3090                                 // Placement was handled in lua
3091
3092                                 // Apply returned ItemStack
3093                                 if(g_settings->getBool("creative_mode") == false)
3094                                         playersao->setWieldedItem(item);
3095                         }
3096
3097                 } // action == 3
3098
3099                 /*
3100                         4: use
3101                 */
3102                 else if(action == 4)
3103                 {
3104                         ItemStack item = playersao->getWieldedItem();
3105
3106                         actionstream<<player->getName()<<" uses "<<item.name
3107                                         <<", pointing at "<<pointed.dump()<<std::endl;
3108
3109                         if(scriptapi_item_on_use(m_lua,
3110                                         item, playersao, pointed))
3111                         {
3112                                 // Apply returned ItemStack
3113                                 if(g_settings->getBool("creative_mode") == false)
3114                                         playersao->setWieldedItem(item);
3115                         }
3116
3117                 } // action == 4
3118
3119                 /*
3120                         Catch invalid actions
3121                 */
3122                 else
3123                 {
3124                         infostream<<"WARNING: Server: Invalid action "
3125                                         <<action<<std::endl;
3126                 }
3127         }
3128         else if(command == TOSERVER_REMOVED_SOUNDS)
3129         {
3130                 std::string datastring((char*)&data[2], datasize-2);
3131                 std::istringstream is(datastring, std::ios_base::binary);
3132
3133                 int num = readU16(is);
3134                 for(int k=0; k<num; k++){
3135                         s32 id = readS32(is);
3136                         std::map<s32, ServerPlayingSound>::iterator i =
3137                                         m_playing_sounds.find(id);
3138                         if(i == m_playing_sounds.end())
3139                                 continue;
3140                         ServerPlayingSound &psound = i->second;
3141                         psound.clients.erase(peer_id);
3142                         if(psound.clients.size() == 0)
3143                                 m_playing_sounds.erase(i++);
3144                 }
3145         }
3146         else
3147         {
3148                 infostream<<"Server::ProcessData(): Ignoring "
3149                                 "unknown command "<<command<<std::endl;
3150         }
3151         
3152         } //try
3153         catch(SendFailedException &e)
3154         {
3155                 errorstream<<"Server::ProcessData(): SendFailedException: "
3156                                 <<"what="<<e.what()
3157                                 <<std::endl;
3158         }
3159 }
3160
3161 void Server::onMapEditEvent(MapEditEvent *event)
3162 {
3163         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3164         if(m_ignore_map_edit_events)
3165                 return;
3166         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3167                 return;
3168         MapEditEvent *e = event->clone();
3169         m_unsent_map_edit_queue.push_back(e);
3170 }
3171
3172 Inventory* Server::getInventory(const InventoryLocation &loc)
3173 {
3174         switch(loc.type){
3175         case InventoryLocation::UNDEFINED:
3176         {}
3177         break;
3178         case InventoryLocation::CURRENT_PLAYER:
3179         {}
3180         break;
3181         case InventoryLocation::PLAYER:
3182         {
3183                 Player *player = m_env->getPlayer(loc.name.c_str());
3184                 if(!player)
3185                         return NULL;
3186                 PlayerSAO *playersao = player->getPlayerSAO();
3187                 if(!playersao)
3188                         return NULL;
3189                 return playersao->getInventory();
3190         }
3191         break;
3192         case InventoryLocation::NODEMETA:
3193         {
3194                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3195                 if(!meta)
3196                         return NULL;
3197                 return meta->getInventory();
3198         }
3199         break;
3200         default:
3201                 assert(0);
3202         }
3203         return NULL;
3204 }
3205 std::string Server::getInventoryOwner(const InventoryLocation &loc)
3206 {
3207         switch(loc.type){
3208         case InventoryLocation::UNDEFINED:
3209         {}
3210         break;
3211         case InventoryLocation::CURRENT_PLAYER:
3212         {}
3213         break;
3214         case InventoryLocation::PLAYER:
3215         {
3216                 return loc.name;
3217         }
3218         break;
3219         case InventoryLocation::NODEMETA:
3220         {
3221                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3222                 if(!meta)
3223                         return "";
3224                 return meta->getOwner();
3225         }
3226         break;
3227         default:
3228                 assert(0);
3229         }
3230         return "";
3231 }
3232 void Server::setInventoryModified(const InventoryLocation &loc)
3233 {
3234         switch(loc.type){
3235         case InventoryLocation::UNDEFINED:
3236         {}
3237         break;
3238         case InventoryLocation::PLAYER:
3239         {
3240                 Player *player = m_env->getPlayer(loc.name.c_str());
3241                 if(!player)
3242                         return;
3243                 PlayerSAO *playersao = player->getPlayerSAO();
3244                 if(!playersao)
3245                         return;
3246                 playersao->m_inventory_not_sent = true;
3247                 playersao->m_wielded_item_not_sent = true;
3248         }
3249         break;
3250         case InventoryLocation::NODEMETA:
3251         {
3252                 v3s16 blockpos = getNodeBlockPos(loc.p);
3253
3254                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3255                 if(meta)
3256                         meta->inventoryModified();
3257                 
3258                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3259                 if(block)
3260                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3261                 
3262                 setBlockNotSent(blockpos);
3263         }
3264         break;
3265         default:
3266                 assert(0);
3267         }
3268 }
3269
3270 core::list<PlayerInfo> Server::getPlayerInfo()
3271 {
3272         DSTACK(__FUNCTION_NAME);
3273         JMutexAutoLock envlock(m_env_mutex);
3274         JMutexAutoLock conlock(m_con_mutex);
3275         
3276         core::list<PlayerInfo> list;
3277
3278         core::list<Player*> players = m_env->getPlayers();
3279         
3280         core::list<Player*>::Iterator i;
3281         for(i = players.begin();
3282                         i != players.end(); i++)
3283         {
3284                 PlayerInfo info;
3285
3286                 Player *player = *i;
3287
3288                 try{
3289                         // Copy info from connection to info struct
3290                         info.id = player->peer_id;
3291                         info.address = m_con.GetPeerAddress(player->peer_id);
3292                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3293                 }
3294                 catch(con::PeerNotFoundException &e)
3295                 {
3296                         // Set dummy peer info
3297                         info.id = 0;
3298                         info.address = Address(0,0,0,0,0);
3299                         info.avg_rtt = 0.0;
3300                 }
3301
3302                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3303                 info.position = player->getPosition();
3304
3305                 list.push_back(info);
3306         }
3307
3308         return list;
3309 }
3310
3311
3312 void Server::peerAdded(con::Peer *peer)
3313 {
3314         DSTACK(__FUNCTION_NAME);
3315         verbosestream<<"Server::peerAdded(): peer->id="
3316                         <<peer->id<<std::endl;
3317         
3318         PeerChange c;
3319         c.type = PEER_ADDED;
3320         c.peer_id = peer->id;
3321         c.timeout = false;
3322         m_peer_change_queue.push_back(c);
3323 }
3324
3325 void Server::deletingPeer(con::Peer *peer, bool timeout)
3326 {
3327         DSTACK(__FUNCTION_NAME);
3328         verbosestream<<"Server::deletingPeer(): peer->id="
3329                         <<peer->id<<", timeout="<<timeout<<std::endl;
3330         
3331         PeerChange c;
3332         c.type = PEER_REMOVED;
3333         c.peer_id = peer->id;
3334         c.timeout = timeout;
3335         m_peer_change_queue.push_back(c);
3336 }
3337
3338 /*
3339         Static send methods
3340 */
3341
3342 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3343 {
3344         DSTACK(__FUNCTION_NAME);
3345         std::ostringstream os(std::ios_base::binary);
3346
3347         writeU16(os, TOCLIENT_HP);
3348         writeU8(os, hp);
3349
3350         // Make data buffer
3351         std::string s = os.str();
3352         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3353         // Send as reliable
3354         con.Send(peer_id, 0, data, true);
3355 }
3356
3357 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3358                 const std::wstring &reason)
3359 {
3360         DSTACK(__FUNCTION_NAME);
3361         std::ostringstream os(std::ios_base::binary);
3362
3363         writeU16(os, TOCLIENT_ACCESS_DENIED);
3364         os<<serializeWideString(reason);
3365
3366         // Make data buffer
3367         std::string s = os.str();
3368         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3369         // Send as reliable
3370         con.Send(peer_id, 0, data, true);
3371 }
3372
3373 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3374                 bool set_camera_point_target, v3f camera_point_target)
3375 {
3376         DSTACK(__FUNCTION_NAME);
3377         std::ostringstream os(std::ios_base::binary);
3378
3379         writeU16(os, TOCLIENT_DEATHSCREEN);
3380         writeU8(os, set_camera_point_target);
3381         writeV3F1000(os, camera_point_target);
3382
3383         // Make data buffer
3384         std::string s = os.str();
3385         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3386         // Send as reliable
3387         con.Send(peer_id, 0, data, true);
3388 }
3389
3390 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3391                 IItemDefManager *itemdef)
3392 {
3393         DSTACK(__FUNCTION_NAME);
3394         std::ostringstream os(std::ios_base::binary);
3395
3396         /*
3397                 u16 command
3398                 u32 length of the next item
3399                 zlib-compressed serialized ItemDefManager
3400         */
3401         writeU16(os, TOCLIENT_ITEMDEF);
3402         std::ostringstream tmp_os(std::ios::binary);
3403         itemdef->serialize(tmp_os);
3404         std::ostringstream tmp_os2(std::ios::binary);
3405         compressZlib(tmp_os.str(), tmp_os2);
3406         os<<serializeLongString(tmp_os2.str());
3407
3408         // Make data buffer
3409         std::string s = os.str();
3410         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3411                         <<"): size="<<s.size()<<std::endl;
3412         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3413         // Send as reliable
3414         con.Send(peer_id, 0, data, true);
3415 }
3416
3417 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3418                 INodeDefManager *nodedef)
3419 {
3420         DSTACK(__FUNCTION_NAME);
3421         std::ostringstream os(std::ios_base::binary);
3422
3423         /*
3424                 u16 command
3425                 u32 length of the next item
3426                 zlib-compressed serialized NodeDefManager
3427         */
3428         writeU16(os, TOCLIENT_NODEDEF);
3429         std::ostringstream tmp_os(std::ios::binary);
3430         nodedef->serialize(tmp_os);
3431         std::ostringstream tmp_os2(std::ios::binary);
3432         compressZlib(tmp_os.str(), tmp_os2);
3433         os<<serializeLongString(tmp_os2.str());
3434
3435         // Make data buffer
3436         std::string s = os.str();
3437         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3438                         <<"): size="<<s.size()<<std::endl;
3439         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3440         // Send as reliable
3441         con.Send(peer_id, 0, data, true);
3442 }
3443
3444 /*
3445         Non-static send methods
3446 */
3447
3448 void Server::SendInventory(u16 peer_id)
3449 {
3450         DSTACK(__FUNCTION_NAME);
3451         
3452         PlayerSAO *playersao = getPlayerSAO(peer_id);
3453         assert(playersao);
3454
3455         playersao->m_inventory_not_sent = false;
3456
3457         /*
3458                 Serialize it
3459         */
3460
3461         std::ostringstream os;
3462         playersao->getInventory()->serialize(os);
3463
3464         std::string s = os.str();
3465         
3466         SharedBuffer<u8> data(s.size()+2);
3467         writeU16(&data[0], TOCLIENT_INVENTORY);
3468         memcpy(&data[2], s.c_str(), s.size());
3469         
3470         // Send as reliable
3471         m_con.Send(peer_id, 0, data, true);
3472 }
3473
3474 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3475 {
3476         DSTACK(__FUNCTION_NAME);
3477         
3478         std::ostringstream os(std::ios_base::binary);
3479         u8 buf[12];
3480         
3481         // Write command
3482         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3483         os.write((char*)buf, 2);
3484         
3485         // Write length
3486         writeU16(buf, message.size());
3487         os.write((char*)buf, 2);
3488         
3489         // Write string
3490         for(u32 i=0; i<message.size(); i++)
3491         {
3492                 u16 w = message[i];
3493                 writeU16(buf, w);
3494                 os.write((char*)buf, 2);
3495         }
3496         
3497         // Make data buffer
3498         std::string s = os.str();
3499         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3500         // Send as reliable
3501         m_con.Send(peer_id, 0, data, true);
3502 }
3503
3504 void Server::BroadcastChatMessage(const std::wstring &message)
3505 {
3506         for(core::map<u16, RemoteClient*>::Iterator
3507                 i = m_clients.getIterator();
3508                 i.atEnd() == false; i++)
3509         {
3510                 // Get client and check that it is valid
3511                 RemoteClient *client = i.getNode()->getValue();
3512                 assert(client->peer_id == i.getNode()->getKey());
3513                 if(client->serialization_version == SER_FMT_VER_INVALID)
3514                         continue;
3515
3516                 SendChatMessage(client->peer_id, message);
3517         }
3518 }
3519
3520 void Server::SendPlayerHP(u16 peer_id)
3521 {
3522         DSTACK(__FUNCTION_NAME);
3523         PlayerSAO *playersao = getPlayerSAO(peer_id);
3524         assert(playersao);
3525         playersao->m_hp_not_sent = false;
3526         SendHP(m_con, peer_id, playersao->getHP());
3527 }
3528
3529 void Server::SendMovePlayer(u16 peer_id)
3530 {
3531         DSTACK(__FUNCTION_NAME);
3532         Player *player = m_env->getPlayer(peer_id);
3533         assert(player);
3534
3535         std::ostringstream os(std::ios_base::binary);
3536         writeU16(os, TOCLIENT_MOVE_PLAYER);
3537         writeV3F1000(os, player->getPosition());
3538         writeF1000(os, player->getPitch());
3539         writeF1000(os, player->getYaw());
3540         
3541         {
3542                 v3f pos = player->getPosition();
3543                 f32 pitch = player->getPitch();
3544                 f32 yaw = player->getYaw();
3545                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3546                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3547                                 <<" pitch="<<pitch
3548                                 <<" yaw="<<yaw
3549                                 <<std::endl;
3550         }
3551
3552         // Make data buffer
3553         std::string s = os.str();
3554         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3555         // Send as reliable
3556         m_con.Send(peer_id, 0, data, true);
3557 }
3558
3559 void Server::SendPlayerPrivileges(u16 peer_id)
3560 {
3561         Player *player = m_env->getPlayer(peer_id);
3562         assert(player);
3563         std::set<std::string> privs;
3564         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3565         
3566         std::ostringstream os(std::ios_base::binary);
3567         writeU16(os, TOCLIENT_PRIVILEGES);
3568         writeU16(os, privs.size());
3569         for(std::set<std::string>::const_iterator i = privs.begin();
3570                         i != privs.end(); i++){
3571                 os<<serializeString(*i);
3572         }
3573
3574         // Make data buffer
3575         std::string s = os.str();
3576         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3577         // Send as reliable
3578         m_con.Send(peer_id, 0, data, true);
3579 }
3580
3581 s32 Server::playSound(const SimpleSoundSpec &spec,
3582                 const ServerSoundParams &params)
3583 {
3584         // Find out initial position of sound
3585         bool pos_exists = false;
3586         v3f pos = params.getPos(m_env, &pos_exists);
3587         // If position is not found while it should be, cancel sound
3588         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3589                 return -1;
3590         // Filter destination clients
3591         std::set<RemoteClient*> dst_clients;
3592         if(params.to_player != "")
3593         {
3594                 Player *player = m_env->getPlayer(params.to_player.c_str());
3595                 if(!player){
3596                         infostream<<"Server::playSound: Player \""<<params.to_player
3597                                         <<"\" not found"<<std::endl;
3598                         return -1;
3599                 }
3600                 if(player->peer_id == PEER_ID_INEXISTENT){
3601                         infostream<<"Server::playSound: Player \""<<params.to_player
3602                                         <<"\" not connected"<<std::endl;
3603                         return -1;
3604                 }
3605                 RemoteClient *client = getClient(player->peer_id);
3606                 dst_clients.insert(client);
3607         }
3608         else
3609         {
3610                 for(core::map<u16, RemoteClient*>::Iterator
3611                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3612                 {
3613                         RemoteClient *client = i.getNode()->getValue();
3614                         Player *player = m_env->getPlayer(client->peer_id);
3615                         if(!player)
3616                                 continue;
3617                         if(pos_exists){
3618                                 if(player->getPosition().getDistanceFrom(pos) >
3619                                                 params.max_hear_distance)
3620                                         continue;
3621                         }
3622                         dst_clients.insert(client);
3623                 }
3624         }
3625         if(dst_clients.size() == 0)
3626                 return -1;
3627         // Create the sound
3628         s32 id = m_next_sound_id++;
3629         // The sound will exist as a reference in m_playing_sounds
3630         m_playing_sounds[id] = ServerPlayingSound();
3631         ServerPlayingSound &psound = m_playing_sounds[id];
3632         psound.params = params;
3633         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3634                         i != dst_clients.end(); i++)
3635                 psound.clients.insert((*i)->peer_id);
3636         // Create packet
3637         std::ostringstream os(std::ios_base::binary);
3638         writeU16(os, TOCLIENT_PLAY_SOUND);
3639         writeS32(os, id);
3640         os<<serializeString(spec.name);
3641         writeF1000(os, spec.gain * params.gain);
3642         writeU8(os, params.type);
3643         writeV3F1000(os, pos);
3644         writeU16(os, params.object);
3645         writeU8(os, params.loop);
3646         // Make data buffer
3647         std::string s = os.str();
3648         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3649         // Send
3650         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3651                         i != dst_clients.end(); i++){
3652                 // Send as reliable
3653                 m_con.Send((*i)->peer_id, 0, data, true);
3654         }
3655         return id;
3656 }
3657 void Server::stopSound(s32 handle)
3658 {
3659         // Get sound reference
3660         std::map<s32, ServerPlayingSound>::iterator i =
3661                         m_playing_sounds.find(handle);
3662         if(i == m_playing_sounds.end())
3663                 return;
3664         ServerPlayingSound &psound = i->second;
3665         // Create packet
3666         std::ostringstream os(std::ios_base::binary);
3667         writeU16(os, TOCLIENT_STOP_SOUND);
3668         writeS32(os, handle);
3669         // Make data buffer
3670         std::string s = os.str();
3671         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3672         // Send
3673         for(std::set<u16>::iterator i = psound.clients.begin();
3674                         i != psound.clients.end(); i++){
3675                 // Send as reliable
3676                 m_con.Send(*i, 0, data, true);
3677         }
3678         // Remove sound reference
3679         m_playing_sounds.erase(i);
3680 }
3681
3682 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3683         core::list<u16> *far_players, float far_d_nodes)
3684 {
3685         float maxd = far_d_nodes*BS;
3686         v3f p_f = intToFloat(p, BS);
3687
3688         // Create packet
3689         u32 replysize = 8;
3690         SharedBuffer<u8> reply(replysize);
3691         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3692         writeS16(&reply[2], p.X);
3693         writeS16(&reply[4], p.Y);
3694         writeS16(&reply[6], p.Z);
3695
3696         for(core::map<u16, RemoteClient*>::Iterator
3697                 i = m_clients.getIterator();
3698                 i.atEnd() == false; i++)
3699         {
3700                 // Get client and check that it is valid
3701                 RemoteClient *client = i.getNode()->getValue();
3702                 assert(client->peer_id == i.getNode()->getKey());
3703                 if(client->serialization_version == SER_FMT_VER_INVALID)
3704                         continue;
3705
3706                 // Don't send if it's the same one
3707                 if(client->peer_id == ignore_id)
3708                         continue;
3709                 
3710                 if(far_players)
3711                 {
3712                         // Get player
3713                         Player *player = m_env->getPlayer(client->peer_id);
3714                         if(player)
3715                         {
3716                                 // If player is far away, only set modified blocks not sent
3717                                 v3f player_pos = player->getPosition();
3718                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3719                                 {
3720                                         far_players->push_back(client->peer_id);
3721                                         continue;
3722                                 }
3723                         }
3724                 }
3725
3726                 // Send as reliable
3727                 m_con.Send(client->peer_id, 0, reply, true);
3728         }
3729 }
3730
3731 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3732                 core::list<u16> *far_players, float far_d_nodes)
3733 {
3734         float maxd = far_d_nodes*BS;
3735         v3f p_f = intToFloat(p, BS);
3736
3737         for(core::map<u16, RemoteClient*>::Iterator
3738                 i = m_clients.getIterator();
3739                 i.atEnd() == false; i++)
3740         {
3741                 // Get client and check that it is valid
3742                 RemoteClient *client = i.getNode()->getValue();
3743                 assert(client->peer_id == i.getNode()->getKey());
3744                 if(client->serialization_version == SER_FMT_VER_INVALID)
3745                         continue;
3746
3747                 // Don't send if it's the same one
3748                 if(client->peer_id == ignore_id)
3749                         continue;
3750
3751                 if(far_players)
3752                 {
3753                         // Get player
3754                         Player *player = m_env->getPlayer(client->peer_id);
3755                         if(player)
3756                         {
3757                                 // If player is far away, only set modified blocks not sent
3758                                 v3f player_pos = player->getPosition();
3759                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3760                                 {
3761                                         far_players->push_back(client->peer_id);
3762                                         continue;
3763                                 }
3764                         }
3765                 }
3766
3767                 // Create packet
3768                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3769                 SharedBuffer<u8> reply(replysize);
3770                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3771                 writeS16(&reply[2], p.X);
3772                 writeS16(&reply[4], p.Y);
3773                 writeS16(&reply[6], p.Z);
3774                 n.serialize(&reply[8], client->serialization_version);
3775
3776                 // Send as reliable
3777                 m_con.Send(client->peer_id, 0, reply, true);
3778         }
3779 }
3780
3781 void Server::setBlockNotSent(v3s16 p)
3782 {
3783         for(core::map<u16, RemoteClient*>::Iterator
3784                 i = m_clients.getIterator();
3785                 i.atEnd()==false; i++)
3786         {
3787                 RemoteClient *client = i.getNode()->getValue();
3788                 client->SetBlockNotSent(p);
3789         }
3790 }
3791
3792 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3793 {
3794         DSTACK(__FUNCTION_NAME);
3795
3796         v3s16 p = block->getPos();
3797         
3798 #if 0
3799         // Analyze it a bit
3800         bool completely_air = true;
3801         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3802         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3803         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3804         {
3805                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3806                 {
3807                         completely_air = false;
3808                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3809                 }
3810         }
3811
3812         // Print result
3813         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3814         if(completely_air)
3815                 infostream<<"[completely air] ";
3816         infostream<<std::endl;
3817 #endif
3818
3819         /*
3820                 Create a packet with the block in the right format
3821         */
3822         
3823         std::ostringstream os(std::ios_base::binary);
3824         block->serialize(os, ver, false);
3825         std::string s = os.str();
3826         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3827
3828         u32 replysize = 8 + blockdata.getSize();
3829         SharedBuffer<u8> reply(replysize);
3830         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3831         writeS16(&reply[2], p.X);
3832         writeS16(&reply[4], p.Y);
3833         writeS16(&reply[6], p.Z);
3834         memcpy(&reply[8], *blockdata, blockdata.getSize());
3835
3836         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3837                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3838         
3839         /*
3840                 Send packet
3841         */
3842         m_con.Send(peer_id, 1, reply, true);
3843 }
3844
3845 void Server::SendBlocks(float dtime)
3846 {
3847         DSTACK(__FUNCTION_NAME);
3848
3849         JMutexAutoLock envlock(m_env_mutex);
3850         JMutexAutoLock conlock(m_con_mutex);
3851
3852         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
3853
3854         core::array<PrioritySortedBlockTransfer> queue;
3855
3856         s32 total_sending = 0;
3857         
3858         {
3859                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
3860
3861                 for(core::map<u16, RemoteClient*>::Iterator
3862                         i = m_clients.getIterator();
3863                         i.atEnd() == false; i++)
3864                 {
3865                         RemoteClient *client = i.getNode()->getValue();
3866                         assert(client->peer_id == i.getNode()->getKey());
3867
3868                         // If definitions and textures have not been sent, don't
3869                         // send MapBlocks either
3870                         if(!client->definitions_sent)
3871                                 continue;
3872
3873                         total_sending += client->SendingCount();
3874                         
3875                         if(client->serialization_version == SER_FMT_VER_INVALID)
3876                                 continue;
3877                         
3878                         client->GetNextBlocks(this, dtime, queue);
3879                 }
3880         }
3881
3882         // Sort.
3883         // Lowest priority number comes first.
3884         // Lowest is most important.
3885         queue.sort();
3886
3887         for(u32 i=0; i<queue.size(); i++)
3888         {
3889                 //TODO: Calculate limit dynamically
3890                 if(total_sending >= g_settings->getS32
3891                                 ("max_simultaneous_block_sends_server_total"))
3892                         break;
3893                 
3894                 PrioritySortedBlockTransfer q = queue[i];
3895
3896                 MapBlock *block = NULL;
3897                 try
3898                 {
3899                         block = m_env->getMap().getBlockNoCreate(q.pos);
3900                 }
3901                 catch(InvalidPositionException &e)
3902                 {
3903                         continue;
3904                 }
3905
3906                 RemoteClient *client = getClient(q.peer_id);
3907
3908                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
3909
3910                 client->SentBlock(q.pos);
3911
3912                 total_sending++;
3913         }
3914 }
3915
3916 void Server::fillMediaCache()
3917 {
3918         DSTACK(__FUNCTION_NAME);
3919
3920         infostream<<"Server: Calculating media file checksums"<<std::endl;
3921         
3922         // Collect all media file paths
3923         std::list<std::string> paths;
3924         for(core::list<ModSpec>::Iterator i = m_mods.begin();
3925                         i != m_mods.end(); i++){
3926                 const ModSpec &mod = *i;
3927                 paths.push_back(mod.path + DIR_DELIM + "textures");
3928                 paths.push_back(mod.path + DIR_DELIM + "sounds");
3929                 paths.push_back(mod.path + DIR_DELIM + "media");
3930         }
3931         
3932         // Collect media file information from paths into cache
3933         for(std::list<std::string>::iterator i = paths.begin();
3934                         i != paths.end(); i++)
3935         {
3936                 std::string mediapath = *i;
3937                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
3938                 for(u32 j=0; j<dirlist.size(); j++){
3939                         if(dirlist[j].dir) // Ignode dirs
3940                                 continue;
3941                         std::string filename = dirlist[j].name;
3942                         // If name contains illegal characters, ignore the file
3943                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
3944                                 infostream<<"Server: ignoring illegal file name: \""
3945                                                 <<filename<<"\""<<std::endl;
3946                                 continue;
3947                         }
3948                         // If name is not in a supported format, ignore it
3949                         const char *supported_ext[] = {
3950                                 ".png", ".jpg", ".bmp", ".tga",
3951                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
3952                                 ".ogg",
3953                                 NULL
3954                         };
3955                         if(removeStringEnd(filename, supported_ext) == ""){
3956                                 infostream<<"Server: ignoring unsupported file extension: \""
3957                                                 <<filename<<"\""<<std::endl;
3958                                 continue;
3959                         }
3960                         // Ok, attempt to load the file and add to cache
3961                         std::string filepath = mediapath + DIR_DELIM + filename;
3962                         // Read data
3963                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
3964                         if(fis.good() == false){
3965                                 errorstream<<"Server::fillMediaCache(): Could not open \""
3966                                                 <<filename<<"\" for reading"<<std::endl;
3967                                 continue;
3968                         }
3969                         std::ostringstream tmp_os(std::ios_base::binary);
3970                         bool bad = false;
3971                         for(;;){
3972                                 char buf[1024];
3973                                 fis.read(buf, 1024);
3974                                 std::streamsize len = fis.gcount();
3975                                 tmp_os.write(buf, len);
3976                                 if(fis.eof())
3977                                         break;
3978                                 if(!fis.good()){
3979                                         bad = true;
3980                                         break;
3981                                 }
3982                         }
3983                         if(bad){
3984                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
3985                                                 <<filename<<"\""<<std::endl;
3986                                 continue;
3987                         }
3988                         if(tmp_os.str().length() == 0){
3989                                 errorstream<<"Server::fillMediaCache(): Empty file \""
3990                                                 <<filepath<<"\""<<std::endl;
3991                                 continue;
3992                         }
3993
3994                         SHA1 sha1;
3995                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
3996
3997                         unsigned char *digest = sha1.getDigest();
3998                         std::string sha1_base64 = base64_encode(digest, 20);
3999                         std::string sha1_hex = hex_encode((char*)digest, 20);
4000                         free(digest);
4001
4002                         // Put in list
4003                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4004                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4005                 }
4006         }
4007 }
4008
4009 struct SendableMediaAnnouncement
4010 {
4011         std::string name;
4012         std::string sha1_digest;
4013
4014         SendableMediaAnnouncement(const std::string name_="",
4015                         const std::string sha1_digest_=""):
4016                 name(name_),
4017                 sha1_digest(sha1_digest_)
4018         {}
4019 };
4020
4021 void Server::sendMediaAnnouncement(u16 peer_id)
4022 {
4023         DSTACK(__FUNCTION_NAME);
4024
4025         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4026                         <<std::endl;
4027
4028         core::list<SendableMediaAnnouncement> file_announcements;
4029
4030         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4031                         i != m_media.end(); i++){
4032                 // Put in list
4033                 file_announcements.push_back(
4034                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4035         }
4036
4037         // Make packet
4038         std::ostringstream os(std::ios_base::binary);
4039
4040         /*
4041                 u16 command
4042                 u32 number of files
4043                 for each texture {
4044                         u16 length of name
4045                         string name
4046                         u16 length of sha1_digest
4047                         string sha1_digest
4048                 }
4049         */
4050         
4051         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4052         writeU16(os, file_announcements.size());
4053
4054         for(core::list<SendableMediaAnnouncement>::Iterator
4055                         j = file_announcements.begin();
4056                         j != file_announcements.end(); j++){
4057                 os<<serializeString(j->name);
4058                 os<<serializeString(j->sha1_digest);
4059         }
4060
4061         // Make data buffer
4062         std::string s = os.str();
4063         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4064
4065         // Send as reliable
4066         m_con.Send(peer_id, 0, data, true);
4067
4068 }
4069
4070 struct SendableMedia
4071 {
4072         std::string name;
4073         std::string path;
4074         std::string data;
4075
4076         SendableMedia(const std::string &name_="", const std::string path_="",
4077                         const std::string &data_=""):
4078                 name(name_),
4079                 path(path_),
4080                 data(data_)
4081         {}
4082 };
4083
4084 void Server::sendRequestedMedia(u16 peer_id,
4085                 const core::list<MediaRequest> &tosend)
4086 {
4087         DSTACK(__FUNCTION_NAME);
4088
4089         verbosestream<<"Server::sendRequestedMedia(): "
4090                         <<"Sending files to client"<<std::endl;
4091
4092         /* Read files */
4093
4094         // Put 5kB in one bunch (this is not accurate)
4095         u32 bytes_per_bunch = 5000;
4096
4097         core::array< core::list<SendableMedia> > file_bunches;
4098         file_bunches.push_back(core::list<SendableMedia>());
4099
4100         u32 file_size_bunch_total = 0;
4101
4102         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4103                         i != tosend.end(); i++)
4104         {
4105                 if(m_media.find(i->name) == m_media.end()){
4106                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4107                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4108                         continue;
4109                 }
4110
4111                 //TODO get path + name
4112                 std::string tpath = m_media[(*i).name].path;
4113
4114                 // Read data
4115                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4116                 if(fis.good() == false){
4117                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4118                                         <<tpath<<"\" for reading"<<std::endl;
4119                         continue;
4120                 }
4121                 std::ostringstream tmp_os(std::ios_base::binary);
4122                 bool bad = false;
4123                 for(;;){
4124                         char buf[1024];
4125                         fis.read(buf, 1024);
4126                         std::streamsize len = fis.gcount();
4127                         tmp_os.write(buf, len);
4128                         file_size_bunch_total += len;
4129                         if(fis.eof())
4130                                 break;
4131                         if(!fis.good()){
4132                                 bad = true;
4133                                 break;
4134                         }
4135                 }
4136                 if(bad){
4137                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4138                                         <<(*i).name<<"\""<<std::endl;
4139                         continue;
4140                 }
4141                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4142                                 <<tname<<"\""<<std::endl;*/
4143                 // Put in list
4144                 file_bunches[file_bunches.size()-1].push_back(
4145                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4146
4147                 // Start next bunch if got enough data
4148                 if(file_size_bunch_total >= bytes_per_bunch){
4149                         file_bunches.push_back(core::list<SendableMedia>());
4150                         file_size_bunch_total = 0;
4151                 }
4152
4153         }
4154
4155         /* Create and send packets */
4156
4157         u32 num_bunches = file_bunches.size();
4158         for(u32 i=0; i<num_bunches; i++)
4159         {
4160                 std::ostringstream os(std::ios_base::binary);
4161
4162                 /*
4163                         u16 command
4164                         u16 total number of texture bunches
4165                         u16 index of this bunch
4166                         u32 number of files in this bunch
4167                         for each file {
4168                                 u16 length of name
4169                                 string name
4170                                 u32 length of data
4171                                 data
4172                         }
4173                 */
4174
4175                 writeU16(os, TOCLIENT_MEDIA);
4176                 writeU16(os, num_bunches);
4177                 writeU16(os, i);
4178                 writeU32(os, file_bunches[i].size());
4179
4180                 for(core::list<SendableMedia>::Iterator
4181                                 j = file_bunches[i].begin();
4182                                 j != file_bunches[i].end(); j++){
4183                         os<<serializeString(j->name);
4184                         os<<serializeLongString(j->data);
4185                 }
4186
4187                 // Make data buffer
4188                 std::string s = os.str();
4189                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4190                                 <<i<<"/"<<num_bunches
4191                                 <<" files="<<file_bunches[i].size()
4192                                 <<" size=" <<s.size()<<std::endl;
4193                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4194                 // Send as reliable
4195                 m_con.Send(peer_id, 0, data, true);
4196         }
4197 }
4198
4199 /*
4200         Something random
4201 */
4202
4203 void Server::DiePlayer(u16 peer_id)
4204 {
4205         DSTACK(__FUNCTION_NAME);
4206         
4207         PlayerSAO *playersao = getPlayerSAO(peer_id);
4208         assert(playersao);
4209
4210         infostream<<"Server::DiePlayer(): Player "
4211                         <<playersao->getPlayer()->getName()
4212                         <<" dies"<<std::endl;
4213
4214         playersao->setHP(0);
4215
4216         // Trigger scripted stuff
4217         scriptapi_on_dieplayer(m_lua, playersao);
4218
4219         SendPlayerHP(peer_id);
4220         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4221 }
4222
4223 void Server::RespawnPlayer(u16 peer_id)
4224 {
4225         DSTACK(__FUNCTION_NAME);
4226
4227         PlayerSAO *playersao = getPlayerSAO(peer_id);
4228         assert(playersao);
4229
4230         infostream<<"Server::RespawnPlayer(): Player "
4231                         <<playersao->getPlayer()->getName()
4232                         <<" respawns"<<std::endl;
4233
4234         playersao->setHP(PLAYER_MAX_HP);
4235
4236         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4237         if(!repositioned){
4238                 v3f pos = findSpawnPos(m_env->getServerMap());
4239                 playersao->setPos(pos);
4240         }
4241 }
4242
4243 void Server::UpdateCrafting(u16 peer_id)
4244 {
4245         DSTACK(__FUNCTION_NAME);
4246         
4247         Player* player = m_env->getPlayer(peer_id);
4248         assert(player);
4249
4250         // Get a preview for crafting
4251         ItemStack preview;
4252         // No crafting in creative mode
4253         if(g_settings->getBool("creative_mode") == false)
4254                 getCraftingResult(&player->inventory, preview, false, this);
4255
4256         // Put the new preview in
4257         InventoryList *plist = player->inventory.getList("craftpreview");
4258         assert(plist);
4259         assert(plist->getSize() >= 1);
4260         plist->changeItem(0, preview);
4261 }
4262
4263 RemoteClient* Server::getClient(u16 peer_id)
4264 {
4265         DSTACK(__FUNCTION_NAME);
4266         //JMutexAutoLock lock(m_con_mutex);
4267         core::map<u16, RemoteClient*>::Node *n;
4268         n = m_clients.find(peer_id);
4269         // A client should exist for all peers
4270         assert(n != NULL);
4271         return n->getValue();
4272 }
4273
4274 std::wstring Server::getStatusString()
4275 {
4276         std::wostringstream os(std::ios_base::binary);
4277         os<<L"# Server: ";
4278         // Version
4279         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4280         // Uptime
4281         os<<L", uptime="<<m_uptime.get();
4282         // Information about clients
4283         os<<L", clients={";
4284         for(core::map<u16, RemoteClient*>::Iterator
4285                 i = m_clients.getIterator();
4286                 i.atEnd() == false; i++)
4287         {
4288                 // Get client and check that it is valid
4289                 RemoteClient *client = i.getNode()->getValue();
4290                 assert(client->peer_id == i.getNode()->getKey());
4291                 if(client->serialization_version == SER_FMT_VER_INVALID)
4292                         continue;
4293                 // Get player
4294                 Player *player = m_env->getPlayer(client->peer_id);
4295                 // Get name of player
4296                 std::wstring name = L"unknown";
4297                 if(player != NULL)
4298                         name = narrow_to_wide(player->getName());
4299                 // Add name to information string
4300                 os<<name<<L",";
4301         }
4302         os<<L"}";
4303         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4304                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4305         if(g_settings->get("motd") != "")
4306                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4307         return os.str();
4308 }
4309
4310 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4311 {
4312         std::set<std::string> privs;
4313         scriptapi_get_auth(m_lua, name, NULL, &privs);
4314         return privs;
4315 }
4316
4317 bool Server::checkPriv(const std::string &name, const std::string &priv)
4318 {
4319         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4320         return (privs.count(priv) != 0);
4321 }
4322
4323 void Server::reportPrivsModified(const std::string &name)
4324 {
4325         if(name == ""){
4326                 for(core::map<u16, RemoteClient*>::Iterator
4327                                 i = m_clients.getIterator();
4328                                 i.atEnd() == false; i++){
4329                         RemoteClient *client = i.getNode()->getValue();
4330                         Player *player = m_env->getPlayer(client->peer_id);
4331                         reportPrivsModified(player->getName());
4332                 }
4333         } else {
4334                 Player *player = m_env->getPlayer(name.c_str());
4335                 if(!player)
4336                         return;
4337                 SendPlayerPrivileges(player->peer_id);
4338                 PlayerSAO *sao = player->getPlayerSAO();
4339                 if(!sao)
4340                         return;
4341                 sao->updatePrivileges(
4342                                 getPlayerEffectivePrivs(name),
4343                                 isSingleplayer());
4344         }
4345 }
4346
4347 // Saves g_settings to configpath given at initialization
4348 void Server::saveConfig()
4349 {
4350         if(m_path_config != "")
4351                 g_settings->updateConfigFile(m_path_config.c_str());
4352 }
4353
4354 void Server::notifyPlayer(const char *name, const std::wstring msg)
4355 {
4356         Player *player = m_env->getPlayer(name);
4357         if(!player)
4358                 return;
4359         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4360 }
4361
4362 void Server::notifyPlayers(const std::wstring msg)
4363 {
4364         BroadcastChatMessage(msg);
4365 }
4366
4367 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4368 {
4369         u8 flags = 0;
4370         if(!allow_generate)
4371                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4372         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4373 }
4374
4375 // IGameDef interface
4376 // Under envlock
4377 IItemDefManager* Server::getItemDefManager()
4378 {
4379         return m_itemdef;
4380 }
4381 INodeDefManager* Server::getNodeDefManager()
4382 {
4383         return m_nodedef;
4384 }
4385 ICraftDefManager* Server::getCraftDefManager()
4386 {
4387         return m_craftdef;
4388 }
4389 ITextureSource* Server::getTextureSource()
4390 {
4391         return NULL;
4392 }
4393 u16 Server::allocateUnknownNodeId(const std::string &name)
4394 {
4395         return m_nodedef->allocateDummy(name);
4396 }
4397 ISoundManager* Server::getSoundManager()
4398 {
4399         return &dummySoundManager;
4400 }
4401 MtEventManager* Server::getEventManager()
4402 {
4403         return m_event;
4404 }
4405
4406 IWritableItemDefManager* Server::getWritableItemDefManager()
4407 {
4408         return m_itemdef;
4409 }
4410 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4411 {
4412         return m_nodedef;
4413 }
4414 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4415 {
4416         return m_craftdef;
4417 }
4418
4419 const ModSpec* Server::getModSpec(const std::string &modname)
4420 {
4421         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4422                         i != m_mods.end(); i++){
4423                 const ModSpec &mod = *i;
4424                 if(mod.name == modname)
4425                         return &mod;
4426         }
4427         return NULL;
4428 }
4429 std::string Server::getBuiltinLuaPath()
4430 {
4431         return porting::path_share + DIR_DELIM + "builtin";
4432 }
4433
4434 v3f findSpawnPos(ServerMap &map)
4435 {
4436         //return v3f(50,50,50)*BS;
4437
4438         v3s16 nodepos;
4439         
4440 #if 0
4441         nodepos = v2s16(0,0);
4442         groundheight = 20;
4443 #endif
4444
4445 #if 1
4446         // Try to find a good place a few times
4447         for(s32 i=0; i<1000; i++)
4448         {
4449                 s32 range = 1 + i;
4450                 // We're going to try to throw the player to this position
4451                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4452                                 -range + (myrand()%(range*2)));
4453                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4454                 // Get ground height at point (fallbacks to heightmap function)
4455                 s16 groundheight = map.findGroundLevel(nodepos2d);
4456                 // Don't go underwater
4457                 if(groundheight < WATER_LEVEL)
4458                 {
4459                         //infostream<<"-> Underwater"<<std::endl;
4460                         continue;
4461                 }
4462                 // Don't go to high places
4463                 if(groundheight > WATER_LEVEL + 4)
4464                 {
4465                         //infostream<<"-> Underwater"<<std::endl;
4466                         continue;
4467                 }
4468                 
4469                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4470                 bool is_good = false;
4471                 s32 air_count = 0;
4472                 for(s32 i=0; i<10; i++){
4473                         v3s16 blockpos = getNodeBlockPos(nodepos);
4474                         map.emergeBlock(blockpos, true);
4475                         MapNode n = map.getNodeNoEx(nodepos);
4476                         if(n.getContent() == CONTENT_AIR){
4477                                 air_count++;
4478                                 if(air_count >= 2){
4479                                         is_good = true;
4480                                         nodepos.Y -= 1;
4481                                         break;
4482                                 }
4483                         }
4484                         nodepos.Y++;
4485                 }
4486                 if(is_good){
4487                         // Found a good place
4488                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4489                         break;
4490                 }
4491         }
4492 #endif
4493         
4494         return intToFloat(nodepos, BS);
4495 }
4496
4497 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4498 {
4499         RemotePlayer *player = NULL;
4500         bool newplayer = false;
4501
4502         /*
4503                 Try to get an existing player
4504         */
4505         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4506
4507         // If player is already connected, cancel
4508         if(player != NULL && player->peer_id != 0)
4509         {
4510                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4511                 return NULL;
4512         }
4513
4514         /*
4515                 If player with the wanted peer_id already exists, cancel.
4516         */
4517         if(m_env->getPlayer(peer_id) != NULL)
4518         {
4519                 infostream<<"emergePlayer(): Player with wrong name but same"
4520                                 " peer_id already exists"<<std::endl;
4521                 return NULL;
4522         }
4523
4524         /*
4525                 Create a new player if it doesn't exist yet
4526         */
4527         if(player == NULL)
4528         {
4529                 newplayer = true;
4530                 player = new RemotePlayer(this);
4531                 player->updateName(name);
4532
4533                 /* Set player position */
4534                 infostream<<"Server: Finding spawn place for player \""
4535                                 <<name<<"\""<<std::endl;
4536                 v3f pos = findSpawnPos(m_env->getServerMap());
4537                 player->setPosition(pos);
4538
4539                 /* Add player to environment */
4540                 m_env->addPlayer(player);
4541         }
4542
4543         /*
4544                 Create a new player active object
4545         */
4546         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4547                         getPlayerEffectivePrivs(player->getName()),
4548                         isSingleplayer());
4549
4550         /* Add object to environment */
4551         m_env->addActiveObject(playersao);
4552
4553         /* Run scripts */
4554         if(newplayer)
4555                 scriptapi_on_newplayer(m_lua, playersao);
4556
4557         scriptapi_on_joinplayer(m_lua, playersao);
4558
4559         /* Creative mode */
4560         if(g_settings->getBool("creative_mode"))
4561                 playersao->createCreativeInventory();
4562
4563         return playersao;
4564 }
4565
4566 void Server::handlePeerChange(PeerChange &c)
4567 {
4568         JMutexAutoLock envlock(m_env_mutex);
4569         JMutexAutoLock conlock(m_con_mutex);
4570         
4571         if(c.type == PEER_ADDED)
4572         {
4573                 /*
4574                         Add
4575                 */
4576
4577                 // Error check
4578                 core::map<u16, RemoteClient*>::Node *n;
4579                 n = m_clients.find(c.peer_id);
4580                 // The client shouldn't already exist
4581                 assert(n == NULL);
4582
4583                 // Create client
4584                 RemoteClient *client = new RemoteClient();
4585                 client->peer_id = c.peer_id;
4586                 m_clients.insert(client->peer_id, client);
4587
4588         } // PEER_ADDED
4589         else if(c.type == PEER_REMOVED)
4590         {
4591                 /*
4592                         Delete
4593                 */
4594
4595                 // Error check
4596                 core::map<u16, RemoteClient*>::Node *n;
4597                 n = m_clients.find(c.peer_id);
4598                 // The client should exist
4599                 assert(n != NULL);
4600                 
4601                 /*
4602                         Mark objects to be not known by the client
4603                 */
4604                 RemoteClient *client = n->getValue();
4605                 // Handle objects
4606                 for(core::map<u16, bool>::Iterator
4607                                 i = client->m_known_objects.getIterator();
4608                                 i.atEnd()==false; i++)
4609                 {
4610                         // Get object
4611                         u16 id = i.getNode()->getKey();
4612                         ServerActiveObject* obj = m_env->getActiveObject(id);
4613                         
4614                         if(obj && obj->m_known_by_count > 0)
4615                                 obj->m_known_by_count--;
4616                 }
4617
4618                 /*
4619                         Clear references to playing sounds
4620                 */
4621                 for(std::map<s32, ServerPlayingSound>::iterator
4622                                 i = m_playing_sounds.begin();
4623                                 i != m_playing_sounds.end();)
4624                 {
4625                         ServerPlayingSound &psound = i->second;
4626                         psound.clients.erase(c.peer_id);
4627                         if(psound.clients.size() == 0)
4628                                 m_playing_sounds.erase(i++);
4629                         else
4630                                 i++;
4631                 }
4632
4633                 Player *player = m_env->getPlayer(c.peer_id);
4634
4635                 // Collect information about leaving in chat
4636                 std::wstring message;
4637                 {
4638                         if(player != NULL)
4639                         {
4640                                 std::wstring name = narrow_to_wide(player->getName());
4641                                 message += L"*** ";
4642                                 message += name;
4643                                 message += L" left game";
4644                                 if(c.timeout)
4645                                         message += L" (timed out)";
4646                         }
4647                 }
4648                 
4649                 /* Run scripts and remove from environment */
4650                 {
4651                         if(player != NULL)
4652                         {
4653                                 PlayerSAO *playersao = player->getPlayerSAO();
4654                                 assert(playersao);
4655
4656                                 scriptapi_on_leaveplayer(m_lua, playersao);
4657
4658                                 playersao->disconnected();
4659                         }
4660                 }
4661
4662                 /*
4663                         Print out action
4664                 */
4665                 {
4666                         if(player != NULL)
4667                         {
4668                                 std::ostringstream os(std::ios_base::binary);
4669                                 for(core::map<u16, RemoteClient*>::Iterator
4670                                         i = m_clients.getIterator();
4671                                         i.atEnd() == false; i++)
4672                                 {
4673                                         RemoteClient *client = i.getNode()->getValue();
4674                                         assert(client->peer_id == i.getNode()->getKey());
4675                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4676                                                 continue;
4677                                         // Get player
4678                                         Player *player = m_env->getPlayer(client->peer_id);
4679                                         if(!player)
4680                                                 continue;
4681                                         // Get name of player
4682                                         os<<player->getName()<<" ";
4683                                 }
4684
4685                                 actionstream<<player->getName()<<" "
4686                                                 <<(c.timeout?"times out.":"leaves game.")
4687                                                 <<" List of players: "
4688                                                 <<os.str()<<std::endl;
4689                         }
4690                 }
4691                 
4692                 // Delete client
4693                 delete m_clients[c.peer_id];
4694                 m_clients.remove(c.peer_id);
4695
4696                 // Send player info to all remaining clients
4697                 //SendPlayerInfos();
4698                 
4699                 // Send leave chat message to all remaining clients
4700                 if(message.length() != 0)
4701                         BroadcastChatMessage(message);
4702                 
4703         } // PEER_REMOVED
4704         else
4705         {
4706                 assert(0);
4707         }
4708 }
4709
4710 void Server::handlePeerChanges()
4711 {
4712         while(m_peer_change_queue.size() > 0)
4713         {
4714                 PeerChange c = m_peer_change_queue.pop_front();
4715
4716                 verbosestream<<"Server: Handling peer change: "
4717                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
4718                                 <<std::endl;
4719
4720                 handlePeerChange(c);
4721         }
4722 }
4723
4724 void dedicated_server_loop(Server &server, bool &kill)
4725 {
4726         DSTACK(__FUNCTION_NAME);
4727         
4728         verbosestream<<"dedicated_server_loop()"<<std::endl;
4729
4730         IntervalLimiter m_profiler_interval;
4731
4732         for(;;)
4733         {
4734                 float steplen = g_settings->getFloat("dedicated_server_step");
4735                 // This is kind of a hack but can be done like this
4736                 // because server.step() is very light
4737                 {
4738                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
4739                         sleep_ms((int)(steplen*1000.0));
4740                 }
4741                 server.step(steplen);
4742
4743                 if(server.getShutdownRequested() || kill)
4744                 {
4745                         infostream<<"Dedicated server quitting"<<std::endl;
4746                         break;
4747                 }
4748
4749                 /*
4750                         Profiler
4751                 */
4752                 float profiler_print_interval =
4753                                 g_settings->getFloat("profiler_print_interval");
4754                 if(profiler_print_interval != 0)
4755                 {
4756                         if(m_profiler_interval.step(steplen, profiler_print_interval))
4757                         {
4758                                 infostream<<"Profiler:"<<std::endl;
4759                                 g_profiler->print(infostream);
4760                                 g_profiler->clear();
4761                         }
4762                 }
4763         }
4764 }
4765
4766