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 Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "server.h"
  21 #include <iostream>
  22 #include <queue>
  23 #include "clientserver.h"
  24 #include "map.h"
  25 #include "jmutexautolock.h"
  26 #include "main.h"
  27 #include "constants.h"
  28 #include "voxel.h"
  29 #include "config.h"
  30 #include "filesys.h"
  31 #include "mapblock.h"
  32 #include "serverobject.h"
  33 #include "settings.h"
  34 #include "profiler.h"
  35 #include "log.h"
  36 #include "script.h"
  37 #include "scriptapi.h"
  38 #include "nodedef.h"
  39 #include "itemdef.h"
  40 #include "craftdef.h"
  41 #include "mapgen.h"
  42 #include "content_mapnode.h"
  43 #include "content_nodemeta.h"
  44 #include "content_abm.h"
  45 #include "content_sao.h"
  46 #include "mods.h"
  47 #include "sha1.h"
  48 #include "base64.h"
  49 #include "tool.h"
  50 #include "sound.h" // dummySoundManager
  51 #include "event_manager.h"
  52 #include "hex.h"
  53 #include "util/string.h"
  54 #include "util/pointedthing.h"
  55 #include "util/mathconstants.h"
  56 #include "rollback.h"
  57 #include "util/serialize.h"
  58
  59 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  60
  61 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
  62
  63 class MapEditEventIgnorer
  64 {
  65 public:
  66         MapEditEventIgnorer(bool *flag):
  67                 m_flag(flag)
  68         {
  69                 if(*m_flag == false)
  70                         *m_flag = true;
  71                 else
  72                         m_flag = NULL;
  73         }
  74
  75         ~MapEditEventIgnorer()
  76         {
  77                 if(m_flag)
  78                 {
  79                         assert(*m_flag);
  80                         *m_flag = false;
  81                 }
  82         }
  83
  84 private:
  85         bool *m_flag;
  86 };
  87
  88 class MapEditEventAreaIgnorer
  89 {
  90 public:
  91         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
  92                 m_ignorevariable(ignorevariable)
  93         {
  94                 if(m_ignorevariable->getVolume() == 0)
  95                         *m_ignorevariable = a;
  96                 else
  97                         m_ignorevariable = NULL;
  98         }
  99
 100         ~MapEditEventAreaIgnorer()
 101         {
 102                 if(m_ignorevariable)
 103                 {
 104                         assert(m_ignorevariable->getVolume() != 0);
 105                         *m_ignorevariable = VoxelArea();
 106                 }
 107         }
 108
 109 private:
 110         VoxelArea *m_ignorevariable;
 111 };
 112
 113 void * ServerThread::Thread()
 114 {
 115         ThreadStarted();
 116
 117         log_register_thread("ServerThread");
 118
 119         DSTACK(__FUNCTION_NAME);
 120
 121         BEGIN_DEBUG_EXCEPTION_HANDLER
 122
 123         while(getRun())
 124         {
 125                 try{
 126                         //TimeTaker timer("AsyncRunStep() + Receive()");
 127
 128                         {
 129                                 //TimeTaker timer("AsyncRunStep()");
 130                                 m_server->AsyncRunStep();
 131                         }
 132
 133                         //infostream<<"Running m_server->Receive()"<<std::endl;
 134                         m_server->Receive();
 135                 }
 136                 catch(con::NoIncomingDataException &e)
 137                 {
 138                 }
 139                 catch(con::PeerNotFoundException &e)
 140                 {
 141                         infostream<<"Server: PeerNotFoundException"<<std::endl;
 142                 }
 143                 catch(con::ConnectionBindFailed &e)
 144                 {
 145                         m_server->setAsyncFatalError(e.what());
 146                 }
 147                 catch(LuaError &e)
 148                 {
 149                         m_server->setAsyncFatalError(e.what());
 150                 }
 151         }
 152
 153         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 154
 155         return NULL;
 156 }
 157
 158 void * EmergeThread::Thread()
 159 {
 160         ThreadStarted();
 161
 162         log_register_thread("EmergeThread");
 163
 164         DSTACK(__FUNCTION_NAME);
 165
 166         BEGIN_DEBUG_EXCEPTION_HANDLER
 167
 168         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 169
 170         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 171
 172         /*
 173                 Get block info from queue, emerge them and send them
 174                 to clients.
 175
 176                 After queue is empty, exit.
 177         */
 178         while(getRun())
 179         try{
 180                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
 181                 if(qptr == NULL)
 182                         break;
 183
 184                 SharedPtr<QueuedBlockEmerge> q(qptr);
 185
 186                 v3s16 &p = q->pos;
 187                 v2s16 p2d(p.X,p.Z);
 188
 189                 last_tried_pos = p;
 190
 191                 /*
 192                         Do not generate over-limit
 193                 */
 194                 if(blockpos_over_limit(p))
 195                         continue;
 196
 197                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
 198
 199                 //TimeTaker timer("block emerge");
 200
 201                 /*
 202                         Try to emerge it from somewhere.
 203
 204                         If it is only wanted as optional, only loading from disk
 205                         will be allowed.
 206                 */
 207
 208                 /*
 209                         Check if any peer wants it as non-optional. In that case it
 210                         will be generated.
 211
 212                         Also decrement the emerge queue count in clients.
 213                 */
 214
 215                 bool only_from_disk = true;
 216
 217                 {
 218                         core::map<u16, u8>::Iterator i;
 219                         for(i=q->peer_ids.getIterator(); i.atEnd()==false; i++)
 220                         {
 221                                 //u16 peer_id = i.getNode()->getKey();
 222
 223                                 // Check flags
 224                                 u8 flags = i.getNode()->getValue();
 225                                 if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
 226                                         only_from_disk = false;
 227
 228                         }
 229                 }
 230
 231                 if(enable_mapgen_debug_info)
 232                         infostream<<"EmergeThread: p="
 233                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
 234                                         <<"only_from_disk="<<only_from_disk<<std::endl;
 235
 236                 ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
 237
 238                 MapBlock *block = NULL;
 239                 bool got_block = true;
 240                 core::map<v3s16, MapBlock*> modified_blocks;
 241
 242                 /*
 243                         Try to fetch block from memory or disk.
 244                         If not found and asked to generate, initialize generator.
 245                 */
 246
 247                 bool started_generate = false;
 248                 mapgen::BlockMakeData data;
 249
 250                 {
 251                         JMutexAutoLock envlock(m_server->m_env_mutex);
 252
 253                         // Load sector if it isn't loaded
 254                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
 255                                 map.loadSectorMeta(p2d);
 256
 257                         // Attempt to load block
 258                         block = map.getBlockNoCreateNoEx(p);
 259                         if(!block || block->isDummy() || !block->isGenerated())
 260                         {
 261                                 if(enable_mapgen_debug_info)
 262                                         infostream<<"EmergeThread: not in memory, "
 263                                                         <<"attempting to load from disk"<<std::endl;
 264
 265                                 block = map.loadBlock(p);
 266                         }
 267
 268                         // If could not load and allowed to generate, start generation
 269                         // inside this same envlock
 270                         if(only_from_disk == false &&
 271                                         (block == NULL || block->isGenerated() == false)){
 272                                 if(enable_mapgen_debug_info)
 273                                         infostream<<"EmergeThread: generating"<<std::endl;
 274                                 started_generate = true;
 275
 276                                 map.initBlockMake(&data, p);
 277                         }
 278                 }
 279
 280                 /*
 281                         If generator was initialized, generate now when envlock is free.
 282                 */
 283                 if(started_generate)
 284                 {
 285                         {
 286                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
 287                                                 SPT_AVG);
 288                                 TimeTaker t("mapgen::make_block()");
 289
 290                                 mapgen::make_block(&data);
 291
 292                                 if(enable_mapgen_debug_info == false)
 293                                         t.stop(true); // Hide output
 294                         }
 295
 296                         do{ // enable break
 297                                 // Lock environment again to access the map
 298                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 299
 300                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 301                                                 "mapgen::make_block (envlock)", SPT_AVG);
 302
 303                                 // Blit data back on map, update lighting, add mobs and
 304                                 // whatever this does
 305                                 map.finishBlockMake(&data, modified_blocks);
 306
 307                                 // Get central block
 308                                 block = map.getBlockNoCreateNoEx(p);
 309
 310                                 // If block doesn't exist, don't try doing anything with it
 311                                 // This happens if the block is not in generation boundaries
 312                                 if(!block)
 313                                         break;
 314
 315                                 /*
 316                                         Do some post-generate stuff
 317                                 */
 318
 319                                 v3s16 minp = data.blockpos_min*MAP_BLOCKSIZE;
 320                                 v3s16 maxp = data.blockpos_max*MAP_BLOCKSIZE +
 321                                                 v3s16(1,1,1)*(MAP_BLOCKSIZE-1);
 322
 323                                 /*
 324                                         Ignore map edit events, they will not need to be
 325                                         sent to anybody because the block hasn't been sent
 326                                         to anybody
 327                                 */
 328                                 //MapEditEventIgnorer ign(&m_server->m_ignore_map_edit_events);
 329                                 MapEditEventAreaIgnorer ign(
 330                                                 &m_server->m_ignore_map_edit_events_area,
 331                                                 VoxelArea(minp, maxp));
 332                                 {
 333                                         TimeTaker timer("on_generated");
 334                                         scriptapi_environment_on_generated(m_server->m_lua,
 335                                                         minp, maxp, mapgen::get_blockseed(data.seed, minp));
 336                                         /*int t = timer.stop(true);
 337                                         dstream<<"on_generated took "<<t<<"ms"<<std::endl;*/
 338                                 }
 339
 340                                 if(enable_mapgen_debug_info)
 341                                         infostream<<"EmergeThread: ended up with: "
 342                                                         <<analyze_block(block)<<std::endl;
 343
 344                                 // Activate objects and stuff
 345                                 m_server->m_env->activateBlock(block, 0);
 346                         }while(false);
 347                 }
 348
 349                 if(block == NULL)
 350                         got_block = false;
 351
 352                 /*
 353                         Set sent status of modified blocks on clients
 354                 */
 355
 356                 // NOTE: Server's clients are also behind the connection mutex
 357                 JMutexAutoLock lock(m_server->m_con_mutex);
 358
 359                 /*
 360                         Add the originally fetched block to the modified list
 361                 */
 362                 if(got_block)
 363                 {
 364                         modified_blocks.insert(p, block);
 365                 }
 366
 367                 /*
 368                         Set the modified blocks unsent for all the clients
 369                 */
 370
 371                 for(core::map<u16, RemoteClient*>::Iterator
 372                                 i = m_server->m_clients.getIterator();
 373                                 i.atEnd() == false; i++)
 374                 {
 375                         RemoteClient *client = i.getNode()->getValue();
 376
 377                         if(modified_blocks.size() > 0)
 378                         {
 379                                 // Remove block from sent history
 380                                 client->SetBlocksNotSent(modified_blocks);
 381                         }
 382                 }
 383         }
 384         catch(VersionMismatchException &e)
 385         {
 386                 std::ostringstream err;
 387                 err<<"World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 388                 err<<"----"<<std::endl;
 389                 err<<"\""<<e.what()<<"\""<<std::endl;
 390                 err<<"See debug.txt."<<std::endl;
 391                 err<<"World probably saved by a newer version of Minetest."<<std::endl;
 392                 m_server->setAsyncFatalError(err.str());
 393         }
 394         catch(SerializationError &e)
 395         {
 396                 std::ostringstream err;
 397                 err<<"Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 398                 err<<"----"<<std::endl;
 399                 err<<"\""<<e.what()<<"\""<<std::endl;
 400                 err<<"See debug.txt."<<std::endl;
 401                 err<<"You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 402                 m_server->setAsyncFatalError(err.str());
 403         }
 404
 405         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 406
 407         log_deregister_thread();
 408
 409         return NULL;
 410 }
 411
 412 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
 413 {
 414         if(pos_exists) *pos_exists = false;
 415         switch(type){
 416         case SSP_LOCAL:
 417                 return v3f(0,0,0);
 418         case SSP_POSITIONAL:
 419                 if(pos_exists) *pos_exists = true;
 420                 return pos;
 421         case SSP_OBJECT: {
 422                 if(object == 0)
 423                         return v3f(0,0,0);
 424                 ServerActiveObject *sao = env->getActiveObject(object);
 425                 if(!sao)
 426                         return v3f(0,0,0);
 427                 if(pos_exists) *pos_exists = true;
 428                 return sao->getBasePosition(); }
 429         }
 430         return v3f(0,0,0);
 431 }
 432
 433 void RemoteClient::GetNextBlocks(Server *server, float dtime,
 434                 core::array<PrioritySortedBlockTransfer> &dest)
 435 {
 436         DSTACK(__FUNCTION_NAME);
 437
 438         /*u32 timer_result;
 439         TimeTaker timer("RemoteClient::GetNextBlocks", &timer_result);*/
 440
 441         // Increment timers
 442         m_nothing_to_send_pause_timer -= dtime;
 443         m_nearest_unsent_reset_timer += dtime;
 444
 445         if(m_nothing_to_send_pause_timer >= 0)
 446                 return;
 447
 448         Player *player = server->m_env->getPlayer(peer_id);
 449         // This can happen sometimes; clients and players are not in perfect sync.
 450         if(player == NULL)
 451                 return;
 452
 453         // Won't send anything if already sending
 454         if(m_blocks_sending.size() >= g_settings->getU16
 455                         ("max_simultaneous_block_sends_per_client"))
 456         {
 457                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 458                 return;
 459         }
 460
 461         //TimeTaker timer("RemoteClient::GetNextBlocks");
 462
 463         v3f playerpos = player->getPosition();
 464         v3f playerspeed = player->getSpeed();
 465         v3f playerspeeddir(0,0,0);
 466         if(playerspeed.getLength() > 1.0*BS)
 467                 playerspeeddir = playerspeed / playerspeed.getLength();
 468         // Predict to next block
 469         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 470
 471         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 472
 473         v3s16 center = getNodeBlockPos(center_nodepos);
 474
 475         // Camera position and direction
 476         v3f camera_pos = player->getEyePosition();
 477         v3f camera_dir = v3f(0,0,1);
 478         camera_dir.rotateYZBy(player->getPitch());
 479         camera_dir.rotateXZBy(player->getYaw());
 480
 481         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 482                         <<camera_dir.Z<<")"<<std::endl;*/
 483
 484         /*
 485                 Get the starting value of the block finder radius.
 486         */
 487
 488         if(m_last_center != center)
 489         {
 490                 m_nearest_unsent_d = 0;
 491                 m_last_center = center;
 492         }
 493
 494         /*infostream<<"m_nearest_unsent_reset_timer="
 495                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 496
 497         // Reset periodically to workaround for some bugs or stuff
 498         if(m_nearest_unsent_reset_timer > 20.0)
 499         {
 500                 m_nearest_unsent_reset_timer = 0;
 501                 m_nearest_unsent_d = 0;
 502                 //infostream<<"Resetting m_nearest_unsent_d for "
 503                 //              <<server->getPlayerName(peer_id)<<std::endl;
 504         }
 505
 506         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 507         s16 d_start = m_nearest_unsent_d;
 508
 509         //infostream<<"d_start="<<d_start<<std::endl;
 510
 511         u16 max_simul_sends_setting = g_settings->getU16
 512                         ("max_simultaneous_block_sends_per_client");
 513         u16 max_simul_sends_usually = max_simul_sends_setting;
 514
 515         /*
 516                 Check the time from last addNode/removeNode.
 517
 518                 Decrease send rate if player is building stuff.
 519         */
 520         m_time_from_building += dtime;
 521         if(m_time_from_building < g_settings->getFloat(
 522                                 "full_block_send_enable_min_time_from_building"))
 523         {
 524                 max_simul_sends_usually
 525                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 526         }
 527
 528         /*
 529                 Number of blocks sending + number of blocks selected for sending
 530         */
 531         u32 num_blocks_selected = m_blocks_sending.size();
 532
 533         /*
 534                 next time d will be continued from the d from which the nearest
 535                 unsent block was found this time.
 536
 537                 This is because not necessarily any of the blocks found this
 538                 time are actually sent.
 539         */
 540         s32 new_nearest_unsent_d = -1;
 541
 542         s16 d_max = g_settings->getS16("max_block_send_distance");
 543         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 544
 545         // Don't loop very much at a time
 546         s16 max_d_increment_at_time = 2;
 547         if(d_max > d_start + max_d_increment_at_time)
 548                 d_max = d_start + max_d_increment_at_time;
 549         /*if(d_max_gen > d_start+2)
 550                 d_max_gen = d_start+2;*/
 551
 552         //infostream<<"Starting from "<<d_start<<std::endl;
 553
 554         s32 nearest_emerged_d = -1;
 555         s32 nearest_emergefull_d = -1;
 556         s32 nearest_sent_d = -1;
 557         bool queue_is_full = false;
 558
 559         s16 d;
 560         for(d = d_start; d <= d_max; d++)
 561         {
 562                 /*errorstream<<"checking d="<<d<<" for "
 563                                 <<server->getPlayerName(peer_id)<<std::endl;*/
 564                 //infostream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
 565
 566                 /*
 567                         If m_nearest_unsent_d was changed by the EmergeThread
 568                         (it can change it to 0 through SetBlockNotSent),
 569                         update our d to it.
 570                         Else update m_nearest_unsent_d
 571                 */
 572                 /*if(m_nearest_unsent_d != last_nearest_unsent_d)
 573                 {
 574                         d = m_nearest_unsent_d;
 575                         last_nearest_unsent_d = m_nearest_unsent_d;
 576                 }*/
 577
 578                 /*
 579                         Get the border/face dot coordinates of a "d-radiused"
 580                         box
 581                 */
 582                 core::list<v3s16> list;
 583                 getFacePositions(list, d);
 584
 585                 core::list<v3s16>::Iterator li;
 586                 for(li=list.begin(); li!=list.end(); li++)
 587                 {
 588                         v3s16 p = *li + center;
 589
 590                         /*
 591                                 Send throttling
 592                                 - Don't allow too many simultaneous transfers
 593                                 - EXCEPT when the blocks are very close
 594
 595                                 Also, don't send blocks that are already flying.
 596                         */
 597
 598                         // Start with the usual maximum
 599                         u16 max_simul_dynamic = max_simul_sends_usually;
 600
 601                         // If block is very close, allow full maximum
 602                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 603                                 max_simul_dynamic = max_simul_sends_setting;
 604
 605                         // Don't select too many blocks for sending
 606                         if(num_blocks_selected >= max_simul_dynamic)
 607                         {
 608                                 queue_is_full = true;
 609                                 goto queue_full_break;
 610                         }
 611
 612                         // Don't send blocks that are currently being transferred
 613                         if(m_blocks_sending.find(p) != NULL)
 614                                 continue;
 615
 616                         /*
 617                                 Do not go over-limit
 618                         */
 619                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 620                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 621                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 622                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 623                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 624                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
 625                                 continue;
 626
 627                         // If this is true, inexistent block will be made from scratch
 628                         bool generate = d <= d_max_gen;
 629
 630                         {
 631                                 /*// Limit the generating area vertically to 2/3
 632                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 633                                         generate = false;*/
 634
 635                                 // Limit the send area vertically to 1/2
 636                                 if(abs(p.Y - center.Y) > d_max / 2)
 637                                         continue;
 638                         }
 639
 640 #if 0
 641                         /*
 642                                 If block is far away, don't generate it unless it is
 643                                 near ground level.
 644                         */
 645                         if(d >= 4)
 646                         {
 647         #if 1
 648                                 // Block center y in nodes
 649                                 f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
 650                                 // Don't generate if it's very high or very low
 651                                 if(y < -64 || y > 64)
 652                                         generate = false;
 653         #endif
 654         #if 0
 655                                 v2s16 p2d_nodes_center(
 656                                         MAP_BLOCKSIZE*p.X,
 657                                         MAP_BLOCKSIZE*p.Z);
 658
 659                                 // Get ground height in nodes
 660                                 s16 gh = server->m_env->getServerMap().findGroundLevel(
 661                                                 p2d_nodes_center);
 662
 663                                 // If differs a lot, don't generate
 664                                 if(fabs(gh - y) > MAP_BLOCKSIZE*2)
 665                                         generate = false;
 666                                         // Actually, don't even send it
 667                                         //continue;
 668         #endif
 669                         }
 670 #endif
 671
 672                         //infostream<<"d="<<d<<std::endl;
 673 #if 1
 674                         /*
 675                                 Don't generate or send if not in sight
 676                                 FIXME This only works if the client uses a small enough
 677                                 FOV setting. The default of 72 degrees is fine.
 678                         */
 679
 680                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 681                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 682                         {
 683                                 continue;
 684                         }
 685 #endif
 686                         /*
 687                                 Don't send already sent blocks
 688                         */
 689                         {
 690                                 if(m_blocks_sent.find(p) != NULL)
 691                                 {
 692                                         continue;
 693                                 }
 694                         }
 695
 696                         /*
 697                                 Check if map has this block
 698                         */
 699                         MapBlock *block = server->m_env->getMap().getBlockNoCreateNoEx(p);
 700
 701                         bool surely_not_found_on_disk = false;
 702                         bool block_is_invalid = false;
 703                         if(block != NULL)
 704                         {
 705                                 // Reset usage timer, this block will be of use in the future.
 706                                 block->resetUsageTimer();
 707
 708                                 // Block is dummy if data doesn't exist.
 709                                 // It means it has been not found from disk and not generated
 710                                 if(block->isDummy())
 711                                 {
 712                                         surely_not_found_on_disk = true;
 713                                 }
 714
 715                                 // Block is valid if lighting is up-to-date and data exists
 716                                 if(block->isValid() == false)
 717                                 {
 718                                         block_is_invalid = true;
 719                                 }
 720
 721                                 /*if(block->isFullyGenerated() == false)
 722                                 {
 723                                         block_is_invalid = true;
 724                                 }*/
 725
 726 #if 0
 727                                 v2s16 p2d(p.X, p.Z);
 728                                 ServerMap *map = (ServerMap*)(&server->m_env->getMap());
 729                                 v2s16 chunkpos = map->sector_to_chunk(p2d);
 730                                 if(map->chunkNonVolatile(chunkpos) == false)
 731                                         block_is_invalid = true;
 732 #endif
 733                                 if(block->isGenerated() == false)
 734                                         block_is_invalid = true;
 735 #if 1
 736                                 /*
 737                                         If block is not close, don't send it unless it is near
 738                                         ground level.
 739
 740                                         Block is near ground level if night-time mesh
 741                                         differs from day-time mesh.
 742                                 */
 743                                 if(d >= 4)
 744                                 {
 745                                         if(block->getDayNightDiff() == false)
 746                                                 continue;
 747                                 }
 748 #endif
 749                         }
 750
 751                         /*
 752                                 If block has been marked to not exist on disk (dummy)
 753                                 and generating new ones is not wanted, skip block.
 754                         */
 755                         if(generate == false && surely_not_found_on_disk == true)
 756                         {
 757                                 // get next one.
 758                                 continue;
 759                         }
 760
 761                         /*
 762                                 Add inexistent block to emerge queue.
 763                         */
 764                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 765                         {
 766                                 //TODO: Get value from somewhere
 767                                 // Allow only one block in emerge queue
 768                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
 769                                 // Allow two blocks in queue per client
 770                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
 771                                 u32 max_emerge = 5;
 772                                 // Make it more responsive when needing to generate stuff
 773                                 if(surely_not_found_on_disk)
 774                                         max_emerge = 1;
 775                                 if(server->m_emerge_queue.peerItemCount(peer_id) < max_emerge)
 776                                 {
 777                                         //infostream<<"Adding block to emerge queue"<<std::endl;
 778
 779                                         // Add it to the emerge queue and trigger the thread
 780
 781                                         u8 flags = 0;
 782                                         if(generate == false)
 783                                                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
 784
 785                                         server->m_emerge_queue.addBlock(peer_id, p, flags);
 786                                         server->m_emergethread.trigger();
 787
 788                                         if(nearest_emerged_d == -1)
 789                                                 nearest_emerged_d = d;
 790                                 } else {
 791                                         if(nearest_emergefull_d == -1)
 792                                                 nearest_emergefull_d = d;
 793                                 }
 794
 795                                 // get next one.
 796                                 continue;
 797                         }
 798
 799                         if(nearest_sent_d == -1)
 800                                 nearest_sent_d = d;
 801
 802                         /*
 803                                 Add block to send queue
 804                         */
 805
 806                         /*errorstream<<"sending from d="<<d<<" to "
 807                                         <<server->getPlayerName(peer_id)<<std::endl;*/
 808
 809                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 810
 811                         dest.push_back(q);
 812
 813                         num_blocks_selected += 1;
 814                 }
 815         }
 816 queue_full_break:
 817
 818         //infostream<<"Stopped at "<<d<<std::endl;
 819
 820         // If nothing was found for sending and nothing was queued for
 821         // emerging, continue next time browsing from here
 822         if(nearest_emerged_d != -1){
 823                 new_nearest_unsent_d = nearest_emerged_d;
 824         } else if(nearest_emergefull_d != -1){
 825                 new_nearest_unsent_d = nearest_emergefull_d;
 826         } else {
 827                 if(d > g_settings->getS16("max_block_send_distance")){
 828                         new_nearest_unsent_d = 0;
 829                         m_nothing_to_send_pause_timer = 2.0;
 830                         /*infostream<<"GetNextBlocks(): d wrapped around for "
 831                                         <<server->getPlayerName(peer_id)
 832                                         <<"; setting to 0 and pausing"<<std::endl;*/
 833                 } else {
 834                         if(nearest_sent_d != -1)
 835                                 new_nearest_unsent_d = nearest_sent_d;
 836                         else
 837                                 new_nearest_unsent_d = d;
 838                 }
 839         }
 840
 841         if(new_nearest_unsent_d != -1)
 842                 m_nearest_unsent_d = new_nearest_unsent_d;
 843
 844         /*timer_result = timer.stop(true);
 845         if(timer_result != 0)
 846                 infostream<<"GetNextBlocks timeout: "<<timer_result<<" (!=0)"<<std::endl;*/
 847 }
 848
 849 void RemoteClient::GotBlock(v3s16 p)
 850 {
 851         if(m_blocks_sending.find(p) != NULL)
 852                 m_blocks_sending.remove(p);
 853         else
 854         {
 855                 /*infostream<<"RemoteClient::GotBlock(): Didn't find in"
 856                                 " m_blocks_sending"<<std::endl;*/
 857                 m_excess_gotblocks++;
 858         }
 859         m_blocks_sent.insert(p, true);
 860 }
 861
 862 void RemoteClient::SentBlock(v3s16 p)
 863 {
 864         if(m_blocks_sending.find(p) == NULL)
 865                 m_blocks_sending.insert(p, 0.0);
 866         else
 867                 infostream<<"RemoteClient::SentBlock(): Sent block"
 868                                 " already in m_blocks_sending"<<std::endl;
 869 }
 870
 871 void RemoteClient::SetBlockNotSent(v3s16 p)
 872 {
 873         m_nearest_unsent_d = 0;
 874
 875         if(m_blocks_sending.find(p) != NULL)
 876                 m_blocks_sending.remove(p);
 877         if(m_blocks_sent.find(p) != NULL)
 878                 m_blocks_sent.remove(p);
 879 }
 880
 881 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
 882 {
 883         m_nearest_unsent_d = 0;
 884
 885         for(core::map<v3s16, MapBlock*>::Iterator
 886                         i = blocks.getIterator();
 887                         i.atEnd()==false; i++)
 888         {
 889                 v3s16 p = i.getNode()->getKey();
 890
 891                 if(m_blocks_sending.find(p) != NULL)
 892                         m_blocks_sending.remove(p);
 893                 if(m_blocks_sent.find(p) != NULL)
 894                         m_blocks_sent.remove(p);
 895         }
 896 }
 897
 898 /*
 899         PlayerInfo
 900 */
 901
 902 PlayerInfo::PlayerInfo()
 903 {
 904         name[0] = 0;
 905         avg_rtt = 0;
 906 }
 907
 908 void PlayerInfo::PrintLine(std::ostream *s)
 909 {
 910         (*s)<<id<<": ";
 911         (*s)<<"\""<<name<<"\" ("
 912                         <<(position.X/10)<<","<<(position.Y/10)
 913                         <<","<<(position.Z/10)<<") ";
 914         address.print(s);
 915         (*s)<<" avg_rtt="<<avg_rtt;
 916         (*s)<<std::endl;
 917 }
 918
 919 /*
 920         Server
 921 */
 922
 923 Server::Server(
 924                 const std::string &path_world,
 925                 const std::string &path_config,
 926                 const SubgameSpec &gamespec,
 927                 bool simple_singleplayer_mode
 928         ):
 929         m_path_world(path_world),
 930         m_path_config(path_config),
 931         m_gamespec(gamespec),
 932         m_simple_singleplayer_mode(simple_singleplayer_mode),
 933         m_async_fatal_error(""),
 934         m_env(NULL),
 935         m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
 936         m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
 937         m_rollback(NULL),
 938         m_rollback_sink_enabled(true),
 939         m_enable_rollback_recording(false),
 940         m_lua(NULL),
 941         m_itemdef(createItemDefManager()),
 942         m_nodedef(createNodeDefManager()),
 943         m_craftdef(createCraftDefManager()),
 944         m_event(new EventManager()),
 945         m_thread(this),
 946         m_emergethread(this),
 947         m_time_of_day_send_timer(0),
 948         m_uptime(0),
 949         m_shutdown_requested(false),
 950         m_ignore_map_edit_events(false),
 951         m_ignore_map_edit_events_peer_id(0)
 952 {
 953         m_liquid_transform_timer = 0.0;
 954         m_print_info_timer = 0.0;
 955         m_objectdata_timer = 0.0;
 956         m_emergethread_trigger_timer = 0.0;
 957         m_savemap_timer = 0.0;
 958
 959         m_env_mutex.Init();
 960         m_con_mutex.Init();
 961         m_step_dtime_mutex.Init();
 962         m_step_dtime = 0.0;
 963
 964         if(path_world == "")
 965                 throw ServerError("Supplied empty world path");
 966
 967         if(!gamespec.isValid())
 968                 throw ServerError("Supplied invalid gamespec");
 969
 970         infostream<<"Server created for gameid \""<<m_gamespec.id<<"\"";
 971         if(m_simple_singleplayer_mode)
 972                 infostream<<" in simple singleplayer mode"<<std::endl;
 973         else
 974                 infostream<<std::endl;
 975         infostream<<"- world:  "<<m_path_world<<std::endl;
 976         infostream<<"- config: "<<m_path_config<<std::endl;
 977         infostream<<"- game:   "<<m_gamespec.path<<std::endl;
 978
 979         // Create rollback manager
 980         std::string rollback_path = m_path_world+DIR_DELIM+"rollback.txt";
 981         m_rollback = createRollbackManager(rollback_path, this);
 982
 983         // Add world mod search path
 984         m_modspaths.push_front(m_path_world + DIR_DELIM + "worldmods");
 985         // Add addon mod search path
 986         for(std::set<std::string>::const_iterator i = m_gamespec.mods_paths.begin();
 987                         i != m_gamespec.mods_paths.end(); i++)
 988                 m_modspaths.push_front((*i));
 989
 990         // Print out mod search paths
 991         for(core::list<std::string>::Iterator i = m_modspaths.begin();
 992                         i != m_modspaths.end(); i++){
 993                 std::string modspath = *i;
 994                 infostream<<"- mods:   "<<modspath<<std::endl;
 995         }
 996
 997         // Path to builtin.lua
 998         std::string builtinpath = getBuiltinLuaPath() + DIR_DELIM + "builtin.lua";
 999
1000         // Create world if it doesn't exist
1001         if(!initializeWorld(m_path_world, m_gamespec.id))
1002                 throw ServerError("Failed to initialize world");
1003
1004         // Lock environment
1005         JMutexAutoLock envlock(m_env_mutex);
1006         JMutexAutoLock conlock(m_con_mutex);
1007
1008         // Initialize scripting
1009
1010         infostream<<"Server: Initializing Lua"<<std::endl;
1011         m_lua = script_init();
1012         assert(m_lua);
1013         // Export API
1014         scriptapi_export(m_lua, this);
1015         // Load and run builtin.lua
1016         infostream<<"Server: Loading builtin.lua [\""
1017                         <<builtinpath<<"\"]"<<std::endl;
1018         bool success = scriptapi_loadmod(m_lua, builtinpath, "__builtin");
1019         if(!success){
1020                 errorstream<<"Server: Failed to load and run "
1021                                 <<builtinpath<<std::endl;
1022                 throw ModError("Failed to load and run "+builtinpath);
1023         }
1024         // Find mods in mod search paths
1025         m_mods = getMods(m_modspaths);
1026         // Print 'em
1027         infostream<<"Server: Loading mods: ";
1028         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1029                         i != m_mods.end(); i++){
1030                 const ModSpec &mod = *i;
1031                 infostream<<mod.name<<" ";
1032         }
1033         infostream<<std::endl;
1034         // Load and run "mod" scripts
1035         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1036                         i != m_mods.end(); i++){
1037                 const ModSpec &mod = *i;
1038                 std::string scriptpath = mod.path + DIR_DELIM + "init.lua";
1039                 infostream<<"  ["<<padStringRight(mod.name, 12)<<"] [\""
1040                                 <<scriptpath<<"\"]"<<std::endl;
1041                 bool success = scriptapi_loadmod(m_lua, scriptpath, mod.name);
1042                 if(!success){
1043                         errorstream<<"Server: Failed to load and run "
1044                                         <<scriptpath<<std::endl;
1045                         throw ModError("Failed to load and run "+scriptpath);
1046                 }
1047         }
1048
1049         // Read Textures and calculate sha1 sums
1050         fillMediaCache();
1051
1052         // Apply item aliases in the node definition manager
1053         m_nodedef->updateAliases(m_itemdef);
1054
1055         // Initialize Environment
1056
1057         m_env = new ServerEnvironment(new ServerMap(path_world, this), m_lua,
1058                         this, this);
1059
1060         // Give environment reference to scripting api
1061         scriptapi_add_environment(m_lua, m_env);
1062
1063         // Register us to receive map edit events
1064         m_env->getMap().addEventReceiver(this);
1065
1066         // If file exists, load environment metadata
1067         if(fs::PathExists(m_path_world+DIR_DELIM+"env_meta.txt"))
1068         {
1069                 infostream<<"Server: Loading environment metadata"<<std::endl;
1070                 m_env->loadMeta(m_path_world);
1071         }
1072
1073         // Load players
1074         infostream<<"Server: Loading players"<<std::endl;
1075         m_env->deSerializePlayers(m_path_world);
1076
1077         /*
1078                 Add some test ActiveBlockModifiers to environment
1079         */
1080         add_legacy_abms(m_env, m_nodedef);
1081 }
1082
1083 Server::~Server()
1084 {
1085         infostream<<"Server destructing"<<std::endl;
1086
1087         /*
1088                 Send shutdown message
1089         */
1090         {
1091                 JMutexAutoLock conlock(m_con_mutex);
1092
1093                 std::wstring line = L"*** Server shutting down";
1094
1095                 /*
1096                         Send the message to clients
1097                 */
1098                 for(core::map<u16, RemoteClient*>::Iterator
1099                         i = m_clients.getIterator();
1100                         i.atEnd() == false; i++)
1101                 {
1102                         // Get client and check that it is valid
1103                         RemoteClient *client = i.getNode()->getValue();
1104                         assert(client->peer_id == i.getNode()->getKey());
1105                         if(client->serialization_version == SER_FMT_VER_INVALID)
1106                                 continue;
1107
1108                         try{
1109                                 SendChatMessage(client->peer_id, line);
1110                         }
1111                         catch(con::PeerNotFoundException &e)
1112                         {}
1113                 }
1114         }
1115
1116         {
1117                 JMutexAutoLock envlock(m_env_mutex);
1118
1119                 /*
1120                         Save players
1121                 */
1122                 infostream<<"Server: Saving players"<<std::endl;
1123                 m_env->serializePlayers(m_path_world);
1124
1125                 /*
1126                         Save environment metadata
1127                 */
1128                 infostream<<"Server: Saving environment metadata"<<std::endl;
1129                 m_env->saveMeta(m_path_world);
1130         }
1131
1132         /*
1133                 Stop threads
1134         */
1135         stop();
1136
1137         /*
1138                 Delete clients
1139         */
1140         {
1141                 JMutexAutoLock clientslock(m_con_mutex);
1142
1143                 for(core::map<u16, RemoteClient*>::Iterator
1144                         i = m_clients.getIterator();
1145                         i.atEnd() == false; i++)
1146                 {
1147                         /*// Delete player
1148                         // NOTE: These are removed by env destructor
1149                         {
1150                                 u16 peer_id = i.getNode()->getKey();
1151                                 JMutexAutoLock envlock(m_env_mutex);
1152                                 m_env->removePlayer(peer_id);
1153                         }*/
1154
1155                         // Delete client
1156                         delete i.getNode()->getValue();
1157                 }
1158         }
1159
1160         // Delete things in the reverse order of creation
1161         delete m_env;
1162         delete m_rollback;
1163         delete m_event;
1164         delete m_itemdef;
1165         delete m_nodedef;
1166         delete m_craftdef;
1167
1168         // Deinitialize scripting
1169         infostream<<"Server: Deinitializing scripting"<<std::endl;
1170         script_deinit(m_lua);
1171
1172         // Delete detached inventories
1173         {
1174                 for(std::map<std::string, Inventory*>::iterator
1175                                 i = m_detached_inventories.begin();
1176                                 i != m_detached_inventories.end(); i++){
1177                         delete i->second;
1178                 }
1179         }
1180 }
1181
1182 void Server::start(unsigned short port)
1183 {
1184         DSTACK(__FUNCTION_NAME);
1185         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1186
1187         // Stop thread if already running
1188         m_thread.stop();
1189
1190         // Initialize connection
1191         m_con.SetTimeoutMs(30);
1192         m_con.Serve(port);
1193
1194         // Start thread
1195         m_thread.setRun(true);
1196         m_thread.Start();
1197
1198         // ASCII art for the win!
1199         actionstream
1200         <<"        .__               __                   __   "<<std::endl
1201         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1202         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1203         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1204         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1205         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1206         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1207         actionstream<<"Server for gameid=\""<<m_gamespec.id
1208                         <<"\" listening on port "<<port<<"."<<std::endl;
1209 }
1210
1211 void Server::stop()
1212 {
1213         DSTACK(__FUNCTION_NAME);
1214
1215         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1216
1217         // Stop threads (set run=false first so both start stopping)
1218         m_thread.setRun(false);
1219         m_emergethread.setRun(false);
1220         m_thread.stop();
1221         m_emergethread.stop();
1222
1223         infostream<<"Server: Threads stopped"<<std::endl;
1224 }
1225
1226 void Server::step(float dtime)
1227 {
1228         DSTACK(__FUNCTION_NAME);
1229         // Limit a bit
1230         if(dtime > 2.0)
1231                 dtime = 2.0;
1232         {
1233                 JMutexAutoLock lock(m_step_dtime_mutex);
1234                 m_step_dtime += dtime;
1235         }
1236         // Throw if fatal error occurred in thread
1237         std::string async_err = m_async_fatal_error.get();
1238         if(async_err != ""){
1239                 throw ServerError(async_err);
1240         }
1241 }
1242
1243 void Server::AsyncRunStep()
1244 {
1245         DSTACK(__FUNCTION_NAME);
1246
1247         g_profiler->add("Server::AsyncRunStep (num)", 1);
1248
1249         float dtime;
1250         {
1251                 JMutexAutoLock lock1(m_step_dtime_mutex);
1252                 dtime = m_step_dtime;
1253         }
1254
1255         {
1256                 // Send blocks to clients
1257                 SendBlocks(dtime);
1258         }
1259
1260         if(dtime < 0.001)
1261                 return;
1262
1263         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1264
1265         //infostream<<"Server steps "<<dtime<<std::endl;
1266         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1267
1268         {
1269                 JMutexAutoLock lock1(m_step_dtime_mutex);
1270                 m_step_dtime -= dtime;
1271         }
1272
1273         /*
1274                 Update uptime
1275         */
1276         {
1277                 m_uptime.set(m_uptime.get() + dtime);
1278         }
1279
1280         {
1281                 // Process connection's timeouts
1282                 JMutexAutoLock lock2(m_con_mutex);
1283                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1284                 m_con.RunTimeouts(dtime);
1285         }
1286
1287         {
1288                 // This has to be called so that the client list gets synced
1289                 // with the peer list of the connection
1290                 handlePeerChanges();
1291         }
1292
1293         /*
1294                 Update time of day and overall game time
1295         */
1296         {
1297                 JMutexAutoLock envlock(m_env_mutex);
1298
1299                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1300
1301                 /*
1302                         Send to clients at constant intervals
1303                 */
1304
1305                 m_time_of_day_send_timer -= dtime;
1306                 if(m_time_of_day_send_timer < 0.0)
1307                 {
1308                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1309
1310                         //JMutexAutoLock envlock(m_env_mutex);
1311                         JMutexAutoLock conlock(m_con_mutex);
1312
1313                         for(core::map<u16, RemoteClient*>::Iterator
1314                                 i = m_clients.getIterator();
1315                                 i.atEnd() == false; i++)
1316                         {
1317                                 RemoteClient *client = i.getNode()->getValue();
1318                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1319                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1320                                 // Send as reliable
1321                                 m_con.Send(client->peer_id, 0, data, true);
1322                         }
1323                 }
1324         }
1325
1326         {
1327                 JMutexAutoLock lock(m_env_mutex);
1328                 // Step environment
1329                 ScopeProfiler sp(g_profiler, "SEnv step");
1330                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1331                 m_env->step(dtime);
1332         }
1333
1334         const float map_timer_and_unload_dtime = 2.92;
1335         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1336         {
1337                 JMutexAutoLock lock(m_env_mutex);
1338                 // Run Map's timers and unload unused data
1339                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1340                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1341                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1342         }
1343
1344         /*
1345                 Do background stuff
1346         */
1347
1348         /*
1349                 Handle players
1350         */
1351         {
1352                 JMutexAutoLock lock(m_env_mutex);
1353                 JMutexAutoLock lock2(m_con_mutex);
1354
1355                 ScopeProfiler sp(g_profiler, "Server: handle players");
1356
1357                 for(core::map<u16, RemoteClient*>::Iterator
1358                         i = m_clients.getIterator();
1359                         i.atEnd() == false; i++)
1360                 {
1361                         RemoteClient *client = i.getNode()->getValue();
1362                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1363                         if(playersao == NULL)
1364                                 continue;
1365
1366                         /*
1367                                 Handle player HPs (die if hp=0)
1368                         */
1369                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1370                                 DiePlayer(client->peer_id);
1371
1372                         /*
1373                                 Send player inventories and HPs if necessary
1374                         */
1375                         if(playersao->m_moved){
1376                                 SendMovePlayer(client->peer_id);
1377                                 playersao->m_moved = false;
1378                         }
1379                         if(playersao->m_inventory_not_sent){
1380                                 UpdateCrafting(client->peer_id);
1381                                 SendInventory(client->peer_id);
1382                         }
1383                         if(playersao->m_hp_not_sent){
1384                                 SendPlayerHP(client->peer_id);
1385                         }
1386                 }
1387         }
1388
1389         /* Transform liquids */
1390         m_liquid_transform_timer += dtime;
1391         if(m_liquid_transform_timer >= 1.00)
1392         {
1393                 m_liquid_transform_timer -= 1.00;
1394
1395                 JMutexAutoLock lock(m_env_mutex);
1396
1397                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1398
1399                 core::map<v3s16, MapBlock*> modified_blocks;
1400                 m_env->getMap().transformLiquids(modified_blocks);
1401 #if 0
1402                 /*
1403                         Update lighting
1404                 */
1405                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1406                 ServerMap &map = ((ServerMap&)m_env->getMap());
1407                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1408
1409                 // Add blocks modified by lighting to modified_blocks
1410                 for(core::map<v3s16, MapBlock*>::Iterator
1411                                 i = lighting_modified_blocks.getIterator();
1412                                 i.atEnd() == false; i++)
1413                 {
1414                         MapBlock *block = i.getNode()->getValue();
1415                         modified_blocks.insert(block->getPos(), block);
1416                 }
1417 #endif
1418                 /*
1419                         Set the modified blocks unsent for all the clients
1420                 */
1421
1422                 JMutexAutoLock lock2(m_con_mutex);
1423
1424                 for(core::map<u16, RemoteClient*>::Iterator
1425                                 i = m_clients.getIterator();
1426                                 i.atEnd() == false; i++)
1427                 {
1428                         RemoteClient *client = i.getNode()->getValue();
1429
1430                         if(modified_blocks.size() > 0)
1431                         {
1432                                 // Remove block from sent history
1433                                 client->SetBlocksNotSent(modified_blocks);
1434                         }
1435                 }
1436         }
1437
1438         // Periodically print some info
1439         {
1440                 float &counter = m_print_info_timer;
1441                 counter += dtime;
1442                 if(counter >= 30.0)
1443                 {
1444                         counter = 0.0;
1445
1446                         JMutexAutoLock lock2(m_con_mutex);
1447
1448                         if(m_clients.size() != 0)
1449                                 infostream<<"Players:"<<std::endl;
1450                         for(core::map<u16, RemoteClient*>::Iterator
1451                                 i = m_clients.getIterator();
1452                                 i.atEnd() == false; i++)
1453                         {
1454                                 //u16 peer_id = i.getNode()->getKey();
1455                                 RemoteClient *client = i.getNode()->getValue();
1456                                 Player *player = m_env->getPlayer(client->peer_id);
1457                                 if(player==NULL)
1458                                         continue;
1459                                 infostream<<"* "<<player->getName()<<"\t";
1460                                 client->PrintInfo(infostream);
1461                         }
1462                 }
1463         }
1464
1465         //if(g_settings->getBool("enable_experimental"))
1466         {
1467
1468         /*
1469                 Check added and deleted active objects
1470         */
1471         {
1472                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1473                 JMutexAutoLock envlock(m_env_mutex);
1474                 JMutexAutoLock conlock(m_con_mutex);
1475
1476                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1477
1478                 // Radius inside which objects are active
1479                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1480                 radius *= MAP_BLOCKSIZE;
1481
1482                 for(core::map<u16, RemoteClient*>::Iterator
1483                         i = m_clients.getIterator();
1484                         i.atEnd() == false; i++)
1485                 {
1486                         RemoteClient *client = i.getNode()->getValue();
1487
1488                         // If definitions and textures have not been sent, don't
1489                         // send objects either
1490                         if(!client->definitions_sent)
1491                                 continue;
1492
1493                         Player *player = m_env->getPlayer(client->peer_id);
1494                         if(player==NULL)
1495                         {
1496                                 // This can happen if the client timeouts somehow
1497                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1498                                                 <<client->peer_id
1499                                                 <<" has no associated player"<<std::endl;*/
1500                                 continue;
1501                         }
1502                         v3s16 pos = floatToInt(player->getPosition(), BS);
1503
1504                         core::map<u16, bool> removed_objects;
1505                         core::map<u16, bool> added_objects;
1506                         m_env->getRemovedActiveObjects(pos, radius,
1507                                         client->m_known_objects, removed_objects);
1508                         m_env->getAddedActiveObjects(pos, radius,
1509                                         client->m_known_objects, added_objects);
1510
1511                         // Ignore if nothing happened
1512                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1513                         {
1514                                 //infostream<<"active objects: none changed"<<std::endl;
1515                                 continue;
1516                         }
1517
1518                         std::string data_buffer;
1519
1520                         char buf[4];
1521
1522                         // Handle removed objects
1523                         writeU16((u8*)buf, removed_objects.size());
1524                         data_buffer.append(buf, 2);
1525                         for(core::map<u16, bool>::Iterator
1526                                         i = removed_objects.getIterator();
1527                                         i.atEnd()==false; i++)
1528                         {
1529                                 // Get object
1530                                 u16 id = i.getNode()->getKey();
1531                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1532
1533                                 // Add to data buffer for sending
1534                                 writeU16((u8*)buf, i.getNode()->getKey());
1535                                 data_buffer.append(buf, 2);
1536
1537                                 // Remove from known objects
1538                                 client->m_known_objects.remove(i.getNode()->getKey());
1539
1540                                 if(obj && obj->m_known_by_count > 0)
1541                                         obj->m_known_by_count--;
1542                         }
1543
1544                         // Handle added objects
1545                         writeU16((u8*)buf, added_objects.size());
1546                         data_buffer.append(buf, 2);
1547                         for(core::map<u16, bool>::Iterator
1548                                         i = added_objects.getIterator();
1549                                         i.atEnd()==false; i++)
1550                         {
1551                                 // Get object
1552                                 u16 id = i.getNode()->getKey();
1553                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1554
1555                                 // Get object type
1556                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1557                                 if(obj == NULL)
1558                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1559                                                         <<": NULL object"<<std::endl;
1560                                 else
1561                                         type = obj->getSendType();
1562
1563                                 // Add to data buffer for sending
1564                                 writeU16((u8*)buf, id);
1565                                 data_buffer.append(buf, 2);
1566                                 writeU8((u8*)buf, type);
1567                                 data_buffer.append(buf, 1);
1568
1569                                 if(obj)
1570                                         data_buffer.append(serializeLongString(
1571                                                         obj->getClientInitializationData()));
1572                                 else
1573                                         data_buffer.append(serializeLongString(""));
1574
1575                                 // Add to known objects
1576                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1577
1578                                 if(obj)
1579                                         obj->m_known_by_count++;
1580                         }
1581
1582                         // Send packet
1583                         SharedBuffer<u8> reply(2 + data_buffer.size());
1584                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1585                         memcpy((char*)&reply[2], data_buffer.c_str(),
1586                                         data_buffer.size());
1587                         // Send as reliable
1588                         m_con.Send(client->peer_id, 0, reply, true);
1589
1590                         verbosestream<<"Server: Sent object remove/add: "
1591                                         <<removed_objects.size()<<" removed, "
1592                                         <<added_objects.size()<<" added, "
1593                                         <<"packet size is "<<reply.getSize()<<std::endl;
1594                 }
1595
1596 #if 0
1597                 /*
1598                         Collect a list of all the objects known by the clients
1599                         and report it back to the environment.
1600                 */
1601
1602                 core::map<u16, bool> all_known_objects;
1603
1604                 for(core::map<u16, RemoteClient*>::Iterator
1605                         i = m_clients.getIterator();
1606                         i.atEnd() == false; i++)
1607                 {
1608                         RemoteClient *client = i.getNode()->getValue();
1609                         // Go through all known objects of client
1610                         for(core::map<u16, bool>::Iterator
1611                                         i = client->m_known_objects.getIterator();
1612                                         i.atEnd()==false; i++)
1613                         {
1614                                 u16 id = i.getNode()->getKey();
1615                                 all_known_objects[id] = true;
1616                         }
1617                 }
1618
1619                 m_env->setKnownActiveObjects(whatever);
1620 #endif
1621
1622         }
1623
1624         /*
1625                 Send object messages
1626         */
1627         {
1628                 JMutexAutoLock envlock(m_env_mutex);
1629                 JMutexAutoLock conlock(m_con_mutex);
1630
1631                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1632
1633                 // Key = object id
1634                 // Value = data sent by object
1635                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1636
1637                 // Get active object messages from environment
1638                 for(;;)
1639                 {
1640                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1641                         if(aom.id == 0)
1642                                 break;
1643
1644                         core::list<ActiveObjectMessage>* message_list = NULL;
1645                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1646                         n = buffered_messages.find(aom.id);
1647                         if(n == NULL)
1648                         {
1649                                 message_list = new core::list<ActiveObjectMessage>;
1650                                 buffered_messages.insert(aom.id, message_list);
1651                         }
1652                         else
1653                         {
1654                                 message_list = n->getValue();
1655                         }
1656                         message_list->push_back(aom);
1657                 }
1658
1659                 // Route data to every client
1660                 for(core::map<u16, RemoteClient*>::Iterator
1661                         i = m_clients.getIterator();
1662                         i.atEnd()==false; i++)
1663                 {
1664                         RemoteClient *client = i.getNode()->getValue();
1665                         std::string reliable_data;
1666                         std::string unreliable_data;
1667                         // Go through all objects in message buffer
1668                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1669                                         j = buffered_messages.getIterator();
1670                                         j.atEnd()==false; j++)
1671                         {
1672                                 // If object is not known by client, skip it
1673                                 u16 id = j.getNode()->getKey();
1674                                 if(client->m_known_objects.find(id) == NULL)
1675                                         continue;
1676                                 // Get message list of object
1677                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1678                                 // Go through every message
1679                                 for(core::list<ActiveObjectMessage>::Iterator
1680                                                 k = list->begin(); k != list->end(); k++)
1681                                 {
1682                                         // Compose the full new data with header
1683                                         ActiveObjectMessage aom = *k;
1684                                         std::string new_data;
1685                                         // Add object id
1686                                         char buf[2];
1687                                         writeU16((u8*)&buf[0], aom.id);
1688                                         new_data.append(buf, 2);
1689                                         // Add data
1690                                         new_data += serializeString(aom.datastring);
1691                                         // Add data to buffer
1692                                         if(aom.reliable)
1693                                                 reliable_data += new_data;
1694                                         else
1695                                                 unreliable_data += new_data;
1696                                 }
1697                         }
1698                         /*
1699                                 reliable_data and unreliable_data are now ready.
1700                                 Send them.
1701                         */
1702                         if(reliable_data.size() > 0)
1703                         {
1704                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1705                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1706                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1707                                                 reliable_data.size());
1708                                 // Send as reliable
1709                                 m_con.Send(client->peer_id, 0, reply, true);
1710                         }
1711                         if(unreliable_data.size() > 0)
1712                         {
1713                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1714                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1715                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1716                                                 unreliable_data.size());
1717                                 // Send as unreliable
1718                                 m_con.Send(client->peer_id, 0, reply, false);
1719                         }
1720
1721                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1722                         {
1723                                 infostream<<"Server: Size of object message data: "
1724                                                 <<"reliable: "<<reliable_data.size()
1725                                                 <<", unreliable: "<<unreliable_data.size()
1726                                                 <<std::endl;
1727                         }*/
1728                 }
1729
1730                 // Clear buffered_messages
1731                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1732                                 i = buffered_messages.getIterator();
1733                                 i.atEnd()==false; i++)
1734                 {
1735                         delete i.getNode()->getValue();
1736                 }
1737         }
1738
1739         } // enable_experimental
1740
1741         /*
1742                 Send queued-for-sending map edit events.
1743         */
1744         {
1745                 // We will be accessing the environment and the connection
1746                 JMutexAutoLock lock(m_env_mutex);
1747                 JMutexAutoLock conlock(m_con_mutex);
1748
1749                 // Don't send too many at a time
1750                 //u32 count = 0;
1751
1752                 // Single change sending is disabled if queue size is not small
1753                 bool disable_single_change_sending = false;
1754                 if(m_unsent_map_edit_queue.size() >= 4)
1755                         disable_single_change_sending = true;
1756
1757                 int event_count = m_unsent_map_edit_queue.size();
1758
1759                 // We'll log the amount of each
1760                 Profiler prof;
1761
1762                 while(m_unsent_map_edit_queue.size() != 0)
1763                 {
1764                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1765
1766                         // Players far away from the change are stored here.
1767                         // Instead of sending the changes, MapBlocks are set not sent
1768                         // for them.
1769                         core::list<u16> far_players;
1770
1771                         if(event->type == MEET_ADDNODE)
1772                         {
1773                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1774                                 prof.add("MEET_ADDNODE", 1);
1775                                 if(disable_single_change_sending)
1776                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1777                                                         &far_players, 5);
1778                                 else
1779                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1780                                                         &far_players, 30);
1781                         }
1782                         else if(event->type == MEET_REMOVENODE)
1783                         {
1784                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1785                                 prof.add("MEET_REMOVENODE", 1);
1786                                 if(disable_single_change_sending)
1787                                         sendRemoveNode(event->p, event->already_known_by_peer,
1788                                                         &far_players, 5);
1789                                 else
1790                                         sendRemoveNode(event->p, event->already_known_by_peer,
1791                                                         &far_players, 30);
1792                         }
1793                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1794                         {
1795                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1796                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1797                                 setBlockNotSent(event->p);
1798                         }
1799                         else if(event->type == MEET_OTHER)
1800                         {
1801                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1802                                 prof.add("MEET_OTHER", 1);
1803                                 for(core::map<v3s16, bool>::Iterator
1804                                                 i = event->modified_blocks.getIterator();
1805                                                 i.atEnd()==false; i++)
1806                                 {
1807                                         v3s16 p = i.getNode()->getKey();
1808                                         setBlockNotSent(p);
1809                                 }
1810                         }
1811                         else
1812                         {
1813                                 prof.add("unknown", 1);
1814                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1815                                                 <<((u32)event->type)<<std::endl;
1816                         }
1817
1818                         /*
1819                                 Set blocks not sent to far players
1820                         */
1821                         if(far_players.size() > 0)
1822                         {
1823                                 // Convert list format to that wanted by SetBlocksNotSent
1824                                 core::map<v3s16, MapBlock*> modified_blocks2;
1825                                 for(core::map<v3s16, bool>::Iterator
1826                                                 i = event->modified_blocks.getIterator();
1827                                                 i.atEnd()==false; i++)
1828                                 {
1829                                         v3s16 p = i.getNode()->getKey();
1830                                         modified_blocks2.insert(p,
1831                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1832                                 }
1833                                 // Set blocks not sent
1834                                 for(core::list<u16>::Iterator
1835                                                 i = far_players.begin();
1836                                                 i != far_players.end(); i++)
1837                                 {
1838                                         u16 peer_id = *i;
1839                                         RemoteClient *client = getClient(peer_id);
1840                                         if(client==NULL)
1841                                                 continue;
1842                                         client->SetBlocksNotSent(modified_blocks2);
1843                                 }
1844                         }
1845
1846                         delete event;
1847
1848                         /*// Don't send too many at a time
1849                         count++;
1850                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1851                                 break;*/
1852                 }
1853
1854                 if(event_count >= 5){
1855                         infostream<<"Server: MapEditEvents:"<<std::endl;
1856                         prof.print(infostream);
1857                 } else if(event_count != 0){
1858                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1859                         prof.print(verbosestream);
1860                 }
1861
1862         }
1863
1864         /*
1865                 Trigger emergethread (it somehow gets to a non-triggered but
1866                 bysy state sometimes)
1867         */
1868         {
1869                 float &counter = m_emergethread_trigger_timer;
1870                 counter += dtime;
1871                 if(counter >= 2.0)
1872                 {
1873                         counter = 0.0;
1874
1875                         m_emergethread.trigger();
1876
1877                         // Update m_enable_rollback_recording here too
1878                         m_enable_rollback_recording =
1879                                         g_settings->getBool("enable_rollback_recording");
1880                 }
1881         }
1882
1883         // Save map, players and auth stuff
1884         {
1885                 float &counter = m_savemap_timer;
1886                 counter += dtime;
1887                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1888                 {
1889                         counter = 0.0;
1890                         JMutexAutoLock lock(m_env_mutex);
1891
1892                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1893
1894                         //Ban stuff
1895                         if(m_banmanager.isModified())
1896                                 m_banmanager.save();
1897
1898                         // Save changed parts of map
1899                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1900
1901                         // Save players
1902                         m_env->serializePlayers(m_path_world);
1903
1904                         // Save environment metadata
1905                         m_env->saveMeta(m_path_world);
1906                 }
1907         }
1908 }
1909
1910 void Server::Receive()
1911 {
1912         DSTACK(__FUNCTION_NAME);
1913         SharedBuffer<u8> data;
1914         u16 peer_id;
1915         u32 datasize;
1916         try{
1917                 {
1918                         JMutexAutoLock conlock(m_con_mutex);
1919                         datasize = m_con.Receive(peer_id, data);
1920                 }
1921
1922                 // This has to be called so that the client list gets synced
1923                 // with the peer list of the connection
1924                 handlePeerChanges();
1925
1926                 ProcessData(*data, datasize, peer_id);
1927         }
1928         catch(con::InvalidIncomingDataException &e)
1929         {
1930                 infostream<<"Server::Receive(): "
1931                                 "InvalidIncomingDataException: what()="
1932                                 <<e.what()<<std::endl;
1933         }
1934         catch(con::PeerNotFoundException &e)
1935         {
1936                 //NOTE: This is not needed anymore
1937
1938                 // The peer has been disconnected.
1939                 // Find the associated player and remove it.
1940
1941                 /*JMutexAutoLock envlock(m_env_mutex);
1942
1943                 infostream<<"ServerThread: peer_id="<<peer_id
1944                                 <<" has apparently closed connection. "
1945                                 <<"Removing player."<<std::endl;
1946
1947                 m_env->removePlayer(peer_id);*/
1948         }
1949 }
1950
1951 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1952 {
1953         DSTACK(__FUNCTION_NAME);
1954         // Environment is locked first.
1955         JMutexAutoLock envlock(m_env_mutex);
1956         JMutexAutoLock conlock(m_con_mutex);
1957
1958         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1959
1960         try{
1961                 Address address = m_con.GetPeerAddress(peer_id);
1962                 std::string addr_s = address.serializeString();
1963
1964                 // drop player if is ip is banned
1965                 if(m_banmanager.isIpBanned(addr_s)){
1966                         infostream<<"Server: A banned client tried to connect from "
1967                                         <<addr_s<<"; banned name was "
1968                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1969                         // This actually doesn't seem to transfer to the client
1970                         SendAccessDenied(m_con, peer_id,
1971                                         L"Your ip is banned. Banned name was "
1972                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1973                         m_con.DeletePeer(peer_id);
1974                         return;
1975                 }
1976         }
1977         catch(con::PeerNotFoundException &e)
1978         {
1979                 infostream<<"Server::ProcessData(): Cancelling: peer "
1980                                 <<peer_id<<" not found"<<std::endl;
1981                 return;
1982         }
1983
1984         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1985
1986         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1987
1988         try
1989         {
1990
1991         if(datasize < 2)
1992                 return;
1993
1994         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
1995
1996         if(command == TOSERVER_INIT)
1997         {
1998                 // [0] u16 TOSERVER_INIT
1999                 // [2] u8 SER_FMT_VER_HIGHEST
2000                 // [3] u8[20] player_name
2001                 // [23] u8[28] password <--- can be sent without this, from old versions
2002
2003                 if(datasize < 2+1+PLAYERNAME_SIZE)
2004                         return;
2005
2006                 verbosestream<<"Server: Got TOSERVER_INIT from "
2007                                 <<peer_id<<std::endl;
2008
2009                 // First byte after command is maximum supported
2010                 // serialization version
2011                 u8 client_max = data[2];
2012                 u8 our_max = SER_FMT_VER_HIGHEST;
2013                 // Use the highest version supported by both
2014                 u8 deployed = core::min_(client_max, our_max);
2015                 // If it's lower than the lowest supported, give up.
2016                 if(deployed < SER_FMT_VER_LOWEST)
2017                         deployed = SER_FMT_VER_INVALID;
2018
2019                 //peer->serialization_version = deployed;
2020                 getClient(peer_id)->pending_serialization_version = deployed;
2021
2022                 if(deployed == SER_FMT_VER_INVALID)
2023                 {
2024                         actionstream<<"Server: A mismatched client tried to connect from "
2025                                         <<addr_s<<std::endl;
2026                         infostream<<"Server: Cannot negotiate "
2027                                         "serialization version with peer "
2028                                         <<peer_id<<std::endl;
2029                         SendAccessDenied(m_con, peer_id, std::wstring(
2030                                         L"Your client's version is not supported.\n"
2031                                         L"Server version is ")
2032                                         + narrow_to_wide(VERSION_STRING) + L"."
2033                         );
2034                         return;
2035                 }
2036
2037                 /*
2038                         Read and check network protocol version
2039                 */
2040
2041                 u16 min_net_proto_version = 0;
2042                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2043                         min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2044
2045                 // Use min if version field doesn't exist (backwards compatibility)
2046                 u16 max_net_proto_version = min_net_proto_version;
2047                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
2048                         max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
2049
2050                 u16 net_proto_version = max_net_proto_version;
2051                 if(max_net_proto_version != SERVER_PROTOCOL_VERSION && min_net_proto_version <= SERVER_PROTOCOL_VERSION)
2052                         net_proto_version = SERVER_PROTOCOL_VERSION;
2053
2054                 verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
2055                                 <<min_net_proto_version<<", max: "<<max_net_proto_version
2056                                 <<", chosen: "<<net_proto_version<<std::endl;
2057
2058                 getClient(peer_id)->net_proto_version = net_proto_version;
2059
2060                 if(net_proto_version == 0)
2061                 {
2062                         actionstream<<"Server: An old tried to connect from "<<addr_s
2063                                         <<std::endl;
2064                         SendAccessDenied(m_con, peer_id, std::wstring(
2065                                         L"Your client's version is not supported.\n"
2066                                         L"Server version is ")
2067                                         + narrow_to_wide(VERSION_STRING) + L"."
2068                         );
2069                         return;
2070                 }
2071
2072                 if(g_settings->getBool("strict_protocol_version_checking"))
2073                 {
2074                         if(net_proto_version != SERVER_PROTOCOL_VERSION)
2075                         {
2076                                 actionstream<<"Server: A mismatched client tried to connect"
2077                                                 <<" from "<<addr_s<<std::endl;
2078                                 SendAccessDenied(m_con, peer_id, std::wstring(
2079                                                 L"Your client's version is not supported.\n"
2080                                                 L"Server version is ")
2081                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2082                                                 + L"server's PROTOCOL_VERSION is "
2083                                                 + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION))
2084                                                 + L", client's PROTOCOL_VERSION is "
2085                                                 + narrow_to_wide(itos(net_proto_version))
2086                                 );
2087                                 return;
2088                         }
2089                 }
2090
2091                 /*
2092                         Set up player
2093                 */
2094
2095                 // Get player name
2096                 char playername[PLAYERNAME_SIZE];
2097                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2098                 {
2099                         playername[i] = data[3+i];
2100                 }
2101                 playername[PLAYERNAME_SIZE-1] = 0;
2102
2103                 if(playername[0]=='\0')
2104                 {
2105                         actionstream<<"Server: Player with an empty name "
2106                                         <<"tried to connect from "<<addr_s<<std::endl;
2107                         SendAccessDenied(m_con, peer_id,
2108                                         L"Empty name");
2109                         return;
2110                 }
2111
2112                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2113                 {
2114                         actionstream<<"Server: Player with an invalid name "
2115                                         <<"tried to connect from "<<addr_s<<std::endl;
2116                         SendAccessDenied(m_con, peer_id,
2117                                         L"Name contains unallowed characters");
2118                         return;
2119                 }
2120
2121                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2122                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2123
2124                 // Get password
2125                 char given_password[PASSWORD_SIZE];
2126                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2127                 {
2128                         // old version - assume blank password
2129                         given_password[0] = 0;
2130                 }
2131                 else
2132                 {
2133                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2134                         {
2135                                 given_password[i] = data[23+i];
2136                         }
2137                         given_password[PASSWORD_SIZE-1] = 0;
2138                 }
2139
2140                 if(!base64_is_valid(given_password)){
2141                         infostream<<"Server: "<<playername
2142                                         <<" supplied invalid password hash"<<std::endl;
2143                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2144                         return;
2145                 }
2146
2147                 std::string checkpwd; // Password hash to check against
2148                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2149
2150                 // If no authentication info exists for user, create it
2151                 if(!has_auth){
2152                         if(!isSingleplayer() &&
2153                                         g_settings->getBool("disallow_empty_password") &&
2154                                         std::string(given_password) == ""){
2155                                 SendAccessDenied(m_con, peer_id, L"Empty passwords are "
2156                                                 L"disallowed. Set a password and try again.");
2157                                 return;
2158                         }
2159                         std::wstring raw_default_password =
2160                                 narrow_to_wide(g_settings->get("default_password"));
2161                         std::string initial_password =
2162                                 translatePassword(playername, raw_default_password);
2163
2164                         // If default_password is empty, allow any initial password
2165                         if (raw_default_password.length() == 0)
2166                                 initial_password = given_password;
2167
2168                         scriptapi_create_auth(m_lua, playername, initial_password);
2169                 }
2170
2171                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2172
2173                 if(!has_auth){
2174                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2175                         return;
2176                 }
2177
2178                 if(given_password != checkpwd){
2179                         infostream<<"Server: peer_id="<<peer_id
2180                                         <<": supplied invalid password for "
2181                                         <<playername<<std::endl;
2182                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2183                         return;
2184                 }
2185
2186                 // Do not allow multiple players in simple singleplayer mode.
2187                 // This isn't a perfect way to do it, but will suffice for now.
2188                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2189                         infostream<<"Server: Not allowing another client to connect in"
2190                                         <<" simple singleplayer mode"<<std::endl;
2191                         SendAccessDenied(m_con, peer_id,
2192                                         L"Running in simple singleplayer mode.");
2193                         return;
2194                 }
2195
2196                 // Enforce user limit.
2197                 // Don't enforce for users that have some admin right
2198                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2199                                 !checkPriv(playername, "server") &&
2200                                 !checkPriv(playername, "ban") &&
2201                                 !checkPriv(playername, "privs") &&
2202                                 !checkPriv(playername, "password") &&
2203                                 playername != g_settings->get("name"))
2204                 {
2205                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2206                                         <<" are already max_users="
2207                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2208                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2209                         return;
2210                 }
2211
2212                 // Get player
2213                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2214
2215                 // If failed, cancel
2216                 if(playersao == NULL)
2217                 {
2218                         errorstream<<"Server: peer_id="<<peer_id
2219                                         <<": failed to emerge player"<<std::endl;
2220                         return;
2221                 }
2222
2223                 /*
2224                         Answer with a TOCLIENT_INIT
2225                 */
2226                 {
2227                         SharedBuffer<u8> reply(2+1+6+8);
2228                         writeU16(&reply[0], TOCLIENT_INIT);
2229                         writeU8(&reply[2], deployed);
2230                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2231                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2232
2233                         // Send as reliable
2234                         m_con.Send(peer_id, 0, reply, true);
2235                 }
2236
2237                 /*
2238                         Send complete position information
2239                 */
2240                 SendMovePlayer(peer_id);
2241
2242                 return;
2243         }
2244
2245         if(command == TOSERVER_INIT2)
2246         {
2247                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2248                                 <<peer_id<<std::endl;
2249
2250                 Player *player = m_env->getPlayer(peer_id);
2251                 if(!player){
2252                         verbosestream<<"Server: TOSERVER_INIT2: "
2253                                         <<"Player not found; ignoring."<<std::endl;
2254                         return;
2255                 }
2256
2257                 getClient(peer_id)->serialization_version
2258                                 = getClient(peer_id)->pending_serialization_version;
2259
2260                 /*
2261                         Send some initialization data
2262                 */
2263
2264                 infostream<<"Server: Sending content to "
2265                                 <<getPlayerName(peer_id)<<std::endl;
2266
2267                 // Send item definitions
2268                 SendItemDef(m_con, peer_id, m_itemdef);
2269
2270                 // Send node definitions
2271                 SendNodeDef(m_con, peer_id, m_nodedef);
2272
2273                 // Send media announcement
2274                 sendMediaAnnouncement(peer_id);
2275
2276                 // Send privileges
2277                 SendPlayerPrivileges(peer_id);
2278
2279                 // Send inventory formspec
2280                 SendPlayerInventoryFormspec(peer_id);
2281
2282                 // Send inventory
2283                 UpdateCrafting(peer_id);
2284                 SendInventory(peer_id);
2285
2286                 // Send HP
2287                 SendPlayerHP(peer_id);
2288
2289                 // Send detached inventories
2290                 sendDetachedInventories(peer_id);
2291
2292                 // Show death screen if necessary
2293                 if(player->hp == 0)
2294                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2295
2296                 // Send time of day
2297                 {
2298                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2299                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2300                         m_con.Send(peer_id, 0, data, true);
2301                 }
2302
2303                 // Note things in chat if not in simple singleplayer mode
2304                 if(!m_simple_singleplayer_mode)
2305                 {
2306                         // Send information about server to player in chat
2307                         SendChatMessage(peer_id, getStatusString());
2308
2309                         // Send information about joining in chat
2310                         {
2311                                 std::wstring name = L"unknown";
2312                                 Player *player = m_env->getPlayer(peer_id);
2313                                 if(player != NULL)
2314                                         name = narrow_to_wide(player->getName());
2315
2316                                 std::wstring message;
2317                                 message += L"*** ";
2318                                 message += name;
2319                                 message += L" joined the game.";
2320                                 BroadcastChatMessage(message);
2321                         }
2322                 }
2323
2324                 // Warnings about protocol version can be issued here
2325                 if(getClient(peer_id)->net_proto_version < SERVER_PROTOCOL_VERSION)
2326                 {
2327                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT IS OLD AND MAY WORK PROPERLY WITH THIS SERVER!");
2328                 }
2329
2330                 /*
2331                         Print out action
2332                 */
2333                 {
2334                         std::ostringstream os(std::ios_base::binary);
2335                         for(core::map<u16, RemoteClient*>::Iterator
2336                                 i = m_clients.getIterator();
2337                                 i.atEnd() == false; i++)
2338                         {
2339                                 RemoteClient *client = i.getNode()->getValue();
2340                                 assert(client->peer_id == i.getNode()->getKey());
2341                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2342                                         continue;
2343                                 // Get player
2344                                 Player *player = m_env->getPlayer(client->peer_id);
2345                                 if(!player)
2346                                         continue;
2347                                 // Get name of player
2348                                 os<<player->getName()<<" ";
2349                         }
2350
2351                         actionstream<<player->getName()<<" joins game. List of players: "
2352                                         <<os.str()<<std::endl;
2353                 }
2354
2355                 return;
2356         }
2357
2358         if(peer_ser_ver == SER_FMT_VER_INVALID)
2359         {
2360                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2361                                 " serialization format invalid or not initialized."
2362                                 " Skipping incoming command="<<command<<std::endl;
2363                 return;
2364         }
2365
2366         Player *player = m_env->getPlayer(peer_id);
2367         if(player == NULL){
2368                 infostream<<"Server::ProcessData(): Cancelling: "
2369                                 "No player for peer_id="<<peer_id
2370                                 <<std::endl;
2371                 return;
2372         }
2373
2374         PlayerSAO *playersao = player->getPlayerSAO();
2375         if(playersao == NULL){
2376                 infostream<<"Server::ProcessData(): Cancelling: "
2377                                 "No player object for peer_id="<<peer_id
2378                                 <<std::endl;
2379                 return;
2380         }
2381
2382         if(command == TOSERVER_PLAYERPOS)
2383         {
2384                 if(datasize < 2+12+12+4+4+4)
2385                         return;
2386
2387                 u32 start = 0;
2388                 v3s32 ps = readV3S32(&data[start+2]);
2389                 v3s32 ss = readV3S32(&data[start+2+12]);
2390                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2391                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2392                 u32 keyPressed = (u32)readU32(&data[2+12+12+4+4]);
2393                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2394                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2395                 pitch = wrapDegrees(pitch);
2396                 yaw = wrapDegrees(yaw);
2397
2398                 player->setPosition(position);
2399                 player->setSpeed(speed);
2400                 player->setPitch(pitch);
2401                 player->setYaw(yaw);
2402                 player->keyPressed=keyPressed;
2403                 player->control.up = (bool)(keyPressed&1);
2404                 player->control.down = (bool)(keyPressed&2);
2405                 player->control.left = (bool)(keyPressed&4);
2406                 player->control.right = (bool)(keyPressed&8);
2407                 player->control.jump = (bool)(keyPressed&16);
2408                 player->control.aux1 = (bool)(keyPressed&32);
2409                 player->control.sneak = (bool)(keyPressed&64);
2410                 player->control.LMB = (bool)(keyPressed&128);
2411                 player->control.RMB = (bool)(keyPressed&256);
2412
2413                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2414                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2415                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2416         }
2417         else if(command == TOSERVER_GOTBLOCKS)
2418         {
2419                 if(datasize < 2+1)
2420                         return;
2421
2422                 /*
2423                         [0] u16 command
2424                         [2] u8 count
2425                         [3] v3s16 pos_0
2426                         [3+6] v3s16 pos_1
2427                         ...
2428                 */
2429
2430                 u16 count = data[2];
2431                 for(u16 i=0; i<count; i++)
2432                 {
2433                         if((s16)datasize < 2+1+(i+1)*6)
2434                                 throw con::InvalidIncomingDataException
2435                                         ("GOTBLOCKS length is too short");
2436                         v3s16 p = readV3S16(&data[2+1+i*6]);
2437                         /*infostream<<"Server: GOTBLOCKS ("
2438                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2439                         RemoteClient *client = getClient(peer_id);
2440                         client->GotBlock(p);
2441                 }
2442         }
2443         else if(command == TOSERVER_DELETEDBLOCKS)
2444         {
2445                 if(datasize < 2+1)
2446                         return;
2447
2448                 /*
2449                         [0] u16 command
2450                         [2] u8 count
2451                         [3] v3s16 pos_0
2452                         [3+6] v3s16 pos_1
2453                         ...
2454                 */
2455
2456                 u16 count = data[2];
2457                 for(u16 i=0; i<count; i++)
2458                 {
2459                         if((s16)datasize < 2+1+(i+1)*6)
2460                                 throw con::InvalidIncomingDataException
2461                                         ("DELETEDBLOCKS length is too short");
2462                         v3s16 p = readV3S16(&data[2+1+i*6]);
2463                         /*infostream<<"Server: DELETEDBLOCKS ("
2464                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2465                         RemoteClient *client = getClient(peer_id);
2466                         client->SetBlockNotSent(p);
2467                 }
2468         }
2469         else if(command == TOSERVER_CLICK_OBJECT)
2470         {
2471                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2472                 return;
2473         }
2474         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2475         {
2476                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2477                 return;
2478         }
2479         else if(command == TOSERVER_GROUND_ACTION)
2480         {
2481                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2482                 return;
2483
2484         }
2485         else if(command == TOSERVER_RELEASE)
2486         {
2487                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2488                 return;
2489         }
2490         else if(command == TOSERVER_SIGNTEXT)
2491         {
2492                 infostream<<"Server: SIGNTEXT not supported anymore"
2493                                 <<std::endl;
2494                 return;
2495         }
2496         else if(command == TOSERVER_SIGNNODETEXT)
2497         {
2498                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2499                                 <<std::endl;
2500                 return;
2501         }
2502         else if(command == TOSERVER_INVENTORY_ACTION)
2503         {
2504                 // Strip command and create a stream
2505                 std::string datastring((char*)&data[2], datasize-2);
2506                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2507                 std::istringstream is(datastring, std::ios_base::binary);
2508                 // Create an action
2509                 InventoryAction *a = InventoryAction::deSerialize(is);
2510                 if(a == NULL)
2511                 {
2512                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2513                                         <<"InventoryAction::deSerialize() returned NULL"
2514                                         <<std::endl;
2515                         return;
2516                 }
2517
2518                 // If something goes wrong, this player is to blame
2519                 RollbackScopeActor rollback_scope(m_rollback,
2520                                 std::string("player:")+player->getName());
2521
2522                 /*
2523                         Note: Always set inventory not sent, to repair cases
2524                         where the client made a bad prediction.
2525                 */
2526
2527                 /*
2528                         Handle restrictions and special cases of the move action
2529                 */
2530                 if(a->getType() == IACTION_MOVE)
2531                 {
2532                         IMoveAction *ma = (IMoveAction*)a;
2533
2534                         ma->from_inv.applyCurrentPlayer(player->getName());
2535                         ma->to_inv.applyCurrentPlayer(player->getName());
2536
2537                         setInventoryModified(ma->from_inv);
2538                         setInventoryModified(ma->to_inv);
2539
2540                         bool from_inv_is_current_player =
2541                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2542                                 (ma->from_inv.name == player->getName());
2543
2544                         bool to_inv_is_current_player =
2545                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2546                                 (ma->to_inv.name == player->getName());
2547
2548                         /*
2549                                 Disable moving items out of craftpreview
2550                         */
2551                         if(ma->from_list == "craftpreview")
2552                         {
2553                                 infostream<<"Ignoring IMoveAction from "
2554                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2555                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2556                                                 <<" because src is "<<ma->from_list<<std::endl;
2557                                 delete a;
2558                                 return;
2559                         }
2560
2561                         /*
2562                                 Disable moving items into craftresult and craftpreview
2563                         */
2564                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2565                         {
2566                                 infostream<<"Ignoring IMoveAction from "
2567                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2568                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2569                                                 <<" because dst is "<<ma->to_list<<std::endl;
2570                                 delete a;
2571                                 return;
2572                         }
2573
2574                         // Disallow moving items in elsewhere than player's inventory
2575                         // if not allowed to interact
2576                         if(!checkPriv(player->getName(), "interact") &&
2577                                         (!from_inv_is_current_player ||
2578                                         !to_inv_is_current_player))
2579                         {
2580                                 infostream<<"Cannot move outside of player's inventory: "
2581                                                 <<"No interact privilege"<<std::endl;
2582                                 delete a;
2583                                 return;
2584                         }
2585                 }
2586                 /*
2587                         Handle restrictions and special cases of the drop action
2588                 */
2589                 else if(a->getType() == IACTION_DROP)
2590                 {
2591                         IDropAction *da = (IDropAction*)a;
2592
2593                         da->from_inv.applyCurrentPlayer(player->getName());
2594
2595                         setInventoryModified(da->from_inv);
2596
2597                         // Disallow dropping items if not allowed to interact
2598                         if(!checkPriv(player->getName(), "interact"))
2599                         {
2600                                 delete a;
2601                                 return;
2602                         }
2603                 }
2604                 /*
2605                         Handle restrictions and special cases of the craft action
2606                 */
2607                 else if(a->getType() == IACTION_CRAFT)
2608                 {
2609                         ICraftAction *ca = (ICraftAction*)a;
2610
2611                         ca->craft_inv.applyCurrentPlayer(player->getName());
2612
2613                         setInventoryModified(ca->craft_inv);
2614
2615                         //bool craft_inv_is_current_player =
2616                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2617                         //      (ca->craft_inv.name == player->getName());
2618
2619                         // Disallow crafting if not allowed to interact
2620                         if(!checkPriv(player->getName(), "interact"))
2621                         {
2622                                 infostream<<"Cannot craft: "
2623                                                 <<"No interact privilege"<<std::endl;
2624                                 delete a;
2625                                 return;
2626                         }
2627                 }
2628
2629                 // Do the action
2630                 a->apply(this, playersao, this);
2631                 // Eat the action
2632                 delete a;
2633         }
2634         else if(command == TOSERVER_CHAT_MESSAGE)
2635         {
2636                 /*
2637                         u16 command
2638                         u16 length
2639                         wstring message
2640                 */
2641                 u8 buf[6];
2642                 std::string datastring((char*)&data[2], datasize-2);
2643                 std::istringstream is(datastring, std::ios_base::binary);
2644
2645                 // Read stuff
2646                 is.read((char*)buf, 2);
2647                 u16 len = readU16(buf);
2648
2649                 std::wstring message;
2650                 for(u16 i=0; i<len; i++)
2651                 {
2652                         is.read((char*)buf, 2);
2653                         message += (wchar_t)readU16(buf);
2654                 }
2655
2656                 // If something goes wrong, this player is to blame
2657                 RollbackScopeActor rollback_scope(m_rollback,
2658                                 std::string("player:")+player->getName());
2659
2660                 // Get player name of this client
2661                 std::wstring name = narrow_to_wide(player->getName());
2662
2663                 // Run script hook
2664                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2665                                 wide_to_narrow(message));
2666                 // If script ate the message, don't proceed
2667                 if(ate)
2668                         return;
2669
2670                 // Line to send to players
2671                 std::wstring line;
2672                 // Whether to send to the player that sent the line
2673                 bool send_to_sender = false;
2674                 // Whether to send to other players
2675                 bool send_to_others = false;
2676
2677                 // Commands are implemented in Lua, so only catch invalid
2678                 // commands that were not "eaten" and send an error back
2679                 if(message[0] == L'/')
2680                 {
2681                         message = message.substr(1);
2682                         send_to_sender = true;
2683                         if(message.length() == 0)
2684                                 line += L"-!- Empty command";
2685                         else
2686                                 line += L"-!- Invalid command: " + str_split(message, L' ')[0];
2687                 }
2688                 else
2689                 {
2690                         if(checkPriv(player->getName(), "shout")){
2691                                 line += L"<";
2692                                 line += name;
2693                                 line += L"> ";
2694                                 line += message;
2695                                 send_to_others = true;
2696                         } else {
2697                                 line += L"-!- You don't have permission to shout.";
2698                                 send_to_sender = true;
2699                         }
2700                 }
2701
2702                 if(line != L"")
2703                 {
2704                         if(send_to_others)
2705                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2706
2707                         /*
2708                                 Send the message to clients
2709                         */
2710                         for(core::map<u16, RemoteClient*>::Iterator
2711                                 i = m_clients.getIterator();
2712                                 i.atEnd() == false; i++)
2713                         {
2714                                 // Get client and check that it is valid
2715                                 RemoteClient *client = i.getNode()->getValue();
2716                                 assert(client->peer_id == i.getNode()->getKey());
2717                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2718                                         continue;
2719
2720                                 // Filter recipient
2721                                 bool sender_selected = (peer_id == client->peer_id);
2722                                 if(sender_selected == true && send_to_sender == false)
2723                                         continue;
2724                                 if(sender_selected == false && send_to_others == false)
2725                                         continue;
2726
2727                                 SendChatMessage(client->peer_id, line);
2728                         }
2729                 }
2730         }
2731         else if(command == TOSERVER_DAMAGE)
2732         {
2733                 std::string datastring((char*)&data[2], datasize-2);
2734                 std::istringstream is(datastring, std::ios_base::binary);
2735                 u8 damage = readU8(is);
2736
2737                 actionstream<<player->getName()<<" damaged by "
2738                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2739                                 <<std::endl;
2740
2741                 playersao->setHP(playersao->getHP() - damage);
2742
2743                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2744                         DiePlayer(peer_id);
2745
2746                 if(playersao->m_hp_not_sent)
2747                         SendPlayerHP(peer_id);
2748         }
2749         else if(command == TOSERVER_PASSWORD)
2750         {
2751                 /*
2752                         [0] u16 TOSERVER_PASSWORD
2753                         [2] u8[28] old password
2754                         [30] u8[28] new password
2755                 */
2756
2757                 if(datasize != 2+PASSWORD_SIZE*2)
2758                         return;
2759                 /*char password[PASSWORD_SIZE];
2760                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2761                         password[i] = data[2+i];
2762                 password[PASSWORD_SIZE-1] = 0;*/
2763                 std::string oldpwd;
2764                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2765                 {
2766                         char c = data[2+i];
2767                         if(c == 0)
2768                                 break;
2769                         oldpwd += c;
2770                 }
2771                 std::string newpwd;
2772                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2773                 {
2774                         char c = data[2+PASSWORD_SIZE+i];
2775                         if(c == 0)
2776                                 break;
2777                         newpwd += c;
2778                 }
2779
2780                 if(!base64_is_valid(newpwd)){
2781                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2782                         // Wrong old password supplied!!
2783                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2784                         return;
2785                 }
2786
2787                 infostream<<"Server: Client requests a password change from "
2788                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2789
2790                 std::string playername = player->getName();
2791
2792                 std::string checkpwd;
2793                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2794
2795                 if(oldpwd != checkpwd)
2796                 {
2797                         infostream<<"Server: invalid old password"<<std::endl;
2798                         // Wrong old password supplied!!
2799                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2800                         return;
2801                 }
2802
2803                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2804                 if(success){
2805                         actionstream<<player->getName()<<" changes password"<<std::endl;
2806                         SendChatMessage(peer_id, L"Password change successful.");
2807                 } else {
2808                         actionstream<<player->getName()<<" tries to change password but "
2809                                         <<"it fails"<<std::endl;
2810                         SendChatMessage(peer_id, L"Password change failed or inavailable.");
2811                 }
2812         }
2813         else if(command == TOSERVER_PLAYERITEM)
2814         {
2815                 if (datasize < 2+2)
2816                         return;
2817
2818                 u16 item = readU16(&data[2]);
2819                 playersao->setWieldIndex(item);
2820         }
2821         else if(command == TOSERVER_RESPAWN)
2822         {
2823                 if(player->hp != 0)
2824                         return;
2825
2826                 RespawnPlayer(peer_id);
2827
2828                 actionstream<<player->getName()<<" respawns at "
2829                                 <<PP(player->getPosition()/BS)<<std::endl;
2830
2831                 // ActiveObject is added to environment in AsyncRunStep after
2832                 // the previous addition has been succesfully removed
2833         }
2834         else if(command == TOSERVER_REQUEST_MEDIA) {
2835                 std::string datastring((char*)&data[2], datasize-2);
2836                 std::istringstream is(datastring, std::ios_base::binary);
2837
2838                 core::list<MediaRequest> tosend;
2839                 u16 numfiles = readU16(is);
2840
2841                 infostream<<"Sending "<<numfiles<<" files to "
2842                                 <<getPlayerName(peer_id)<<std::endl;
2843                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2844
2845                 for(int i = 0; i < numfiles; i++) {
2846                         std::string name = deSerializeString(is);
2847                         tosend.push_back(MediaRequest(name));
2848                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2849                                         <<name<<std::endl;
2850                 }
2851
2852                 sendRequestedMedia(peer_id, tosend);
2853
2854                 // Now the client should know about everything
2855                 // (definitions and files)
2856                 getClient(peer_id)->definitions_sent = true;
2857         }
2858         else if(command == TOSERVER_INTERACT)
2859         {
2860                 std::string datastring((char*)&data[2], datasize-2);
2861                 std::istringstream is(datastring, std::ios_base::binary);
2862
2863                 /*
2864                         [0] u16 command
2865                         [2] u8 action
2866                         [3] u16 item
2867                         [5] u32 length of the next item
2868                         [9] serialized PointedThing
2869                         actions:
2870                         0: start digging (from undersurface) or use
2871                         1: stop digging (all parameters ignored)
2872                         2: digging completed
2873                         3: place block or item (to abovesurface)
2874                         4: use item
2875                 */
2876                 u8 action = readU8(is);
2877                 u16 item_i = readU16(is);
2878                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2879                 PointedThing pointed;
2880                 pointed.deSerialize(tmp_is);
2881
2882                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2883                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2884
2885                 if(player->hp == 0)
2886                 {
2887                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2888                                 <<" tried to interact, but is dead!"<<std::endl;
2889                         return;
2890                 }
2891
2892                 v3f player_pos = playersao->getLastGoodPosition();
2893
2894                 // Update wielded item
2895                 playersao->setWieldIndex(item_i);
2896
2897                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2898                 v3s16 p_under = pointed.node_undersurface;
2899                 v3s16 p_above = pointed.node_abovesurface;
2900
2901                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2902                 ServerActiveObject *pointed_object = NULL;
2903                 if(pointed.type == POINTEDTHING_OBJECT)
2904                 {
2905                         pointed_object = m_env->getActiveObject(pointed.object_id);
2906                         if(pointed_object == NULL)
2907                         {
2908                                 verbosestream<<"TOSERVER_INTERACT: "
2909                                         "pointed object is NULL"<<std::endl;
2910                                 return;
2911                         }
2912
2913                 }
2914
2915                 v3f pointed_pos_under = player_pos;
2916                 v3f pointed_pos_above = player_pos;
2917                 if(pointed.type == POINTEDTHING_NODE)
2918                 {
2919                         pointed_pos_under = intToFloat(p_under, BS);
2920                         pointed_pos_above = intToFloat(p_above, BS);
2921                 }
2922                 else if(pointed.type == POINTEDTHING_OBJECT)
2923                 {
2924                         pointed_pos_under = pointed_object->getBasePosition();
2925                         pointed_pos_above = pointed_pos_under;
2926                 }
2927
2928                 /*
2929                         Check that target is reasonably close
2930                         (only when digging or placing things)
2931                 */
2932                 if(action == 0 || action == 2 || action == 3)
2933                 {
2934                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2935                         float max_d = BS * 14; // Just some large enough value
2936                         if(d > max_d){
2937                                 actionstream<<"Player "<<player->getName()
2938                                                 <<" tried to access "<<pointed.dump()
2939                                                 <<" from too far: "
2940                                                 <<"d="<<d<<", max_d="<<max_d
2941                                                 <<". ignoring."<<std::endl;
2942                                 // Re-send block to revert change on client-side
2943                                 RemoteClient *client = getClient(peer_id);
2944                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2945                                 client->SetBlockNotSent(blockpos);
2946                                 // Do nothing else
2947                                 return;
2948                         }
2949                 }
2950
2951                 /*
2952                         Make sure the player is allowed to do it
2953                 */
2954                 if(!checkPriv(player->getName(), "interact"))
2955                 {
2956                         actionstream<<player->getName()<<" attempted to interact with "
2957                                         <<pointed.dump()<<" without 'interact' privilege"
2958                                         <<std::endl;
2959                         // Re-send block to revert change on client-side
2960                         RemoteClient *client = getClient(peer_id);
2961                         // Digging completed -> under
2962                         if(action == 2){
2963                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2964                                 client->SetBlockNotSent(blockpos);
2965                         }
2966                         // Placement -> above
2967                         if(action == 3){
2968                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
2969                                 client->SetBlockNotSent(blockpos);
2970                         }
2971                         return;
2972                 }
2973
2974                 /*
2975                         If something goes wrong, this player is to blame
2976                 */
2977                 RollbackScopeActor rollback_scope(m_rollback,
2978                                 std::string("player:")+player->getName());
2979
2980                 /*
2981                         0: start digging or punch object
2982                 */
2983                 if(action == 0)
2984                 {
2985                         if(pointed.type == POINTEDTHING_NODE)
2986                         {
2987                                 /*
2988                                         NOTE: This can be used in the future to check if
2989                                         somebody is cheating, by checking the timing.
2990                                 */
2991                                 MapNode n(CONTENT_IGNORE);
2992                                 try
2993                                 {
2994                                         n = m_env->getMap().getNode(p_under);
2995                                 }
2996                                 catch(InvalidPositionException &e)
2997                                 {
2998                                         infostream<<"Server: Not punching: Node not found."
2999                                                         <<" Adding block to emerge queue."
3000                                                         <<std::endl;
3001                                         m_emerge_queue.addBlock(peer_id,
3002                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3003                                 }
3004                                 if(n.getContent() != CONTENT_IGNORE)
3005                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
3006                                 // Cheat prevention
3007                                 playersao->noCheatDigStart(p_under);
3008                         }
3009                         else if(pointed.type == POINTEDTHING_OBJECT)
3010                         {
3011                                 // Skip if object has been removed
3012                                 if(pointed_object->m_removed)
3013                                         return;
3014
3015                                 actionstream<<player->getName()<<" punches object "
3016                                                 <<pointed.object_id<<": "
3017                                                 <<pointed_object->getDescription()<<std::endl;
3018
3019                                 ItemStack punchitem = playersao->getWieldedItem();
3020                                 ToolCapabilities toolcap =
3021                                                 punchitem.getToolCapabilities(m_itemdef);
3022                                 v3f dir = (pointed_object->getBasePosition() -
3023                                                 (player->getPosition() + player->getEyeOffset())
3024                                                         ).normalize();
3025                                 float time_from_last_punch =
3026                                         playersao->resetTimeFromLastPunch();
3027                                 pointed_object->punch(dir, &toolcap, playersao,
3028                                                 time_from_last_punch);
3029                         }
3030
3031                 } // action == 0
3032
3033                 /*
3034                         1: stop digging
3035                 */
3036                 else if(action == 1)
3037                 {
3038                 } // action == 1
3039
3040                 /*
3041                         2: Digging completed
3042                 */
3043                 else if(action == 2)
3044                 {
3045                         // Only digging of nodes
3046                         if(pointed.type == POINTEDTHING_NODE)
3047                         {
3048                                 MapNode n(CONTENT_IGNORE);
3049                                 try
3050                                 {
3051                                         n = m_env->getMap().getNode(p_under);
3052                                 }
3053                                 catch(InvalidPositionException &e)
3054                                 {
3055                                         infostream<<"Server: Not finishing digging: Node not found."
3056                                                         <<" Adding block to emerge queue."
3057                                                         <<std::endl;
3058                                         m_emerge_queue.addBlock(peer_id,
3059                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3060                                 }
3061
3062                                 /* Cheat prevention */
3063                                 bool is_valid_dig = true;
3064                                 if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
3065                                 {
3066                                         v3s16 nocheat_p = playersao->getNoCheatDigPos();
3067                                         float nocheat_t = playersao->getNoCheatDigTime();
3068                                         playersao->noCheatDigEnd();
3069                                         // If player didn't start digging this, ignore dig
3070                                         if(nocheat_p != p_under){
3071                                                 infostream<<"Server: NoCheat: "<<player->getName()
3072                                                                 <<" started digging "
3073                                                                 <<PP(nocheat_p)<<" and completed digging "
3074                                                                 <<PP(p_under)<<"; not digging."<<std::endl;
3075                                                 is_valid_dig = false;
3076                                         }
3077                                         // Get player's wielded item
3078                                         ItemStack playeritem;
3079                                         InventoryList *mlist = playersao->getInventory()->getList("main");
3080                                         if(mlist != NULL)
3081                                                 playeritem = mlist->getItem(playersao->getWieldIndex());
3082                                         ToolCapabilities playeritem_toolcap =
3083                                                         playeritem.getToolCapabilities(m_itemdef);
3084                                         // Get diggability and expected digging time
3085                                         DigParams params = getDigParams(m_nodedef->get(n).groups,
3086                                                         &playeritem_toolcap);
3087                                         // If can't dig, try hand
3088                                         if(!params.diggable){
3089                                                 const ItemDefinition &hand = m_itemdef->get("");
3090                                                 const ToolCapabilities *tp = hand.tool_capabilities;
3091                                                 if(tp)
3092                                                         params = getDigParams(m_nodedef->get(n).groups, tp);
3093                                         }
3094                                         // If can't dig, ignore dig
3095                                         if(!params.diggable){
3096                                                 infostream<<"Server: NoCheat: "<<player->getName()
3097                                                                 <<" completed digging "<<PP(p_under)
3098                                                                 <<", which is not diggable with tool. not digging."
3099                                                                 <<std::endl;
3100                                                 is_valid_dig = false;
3101                                         }
3102                                         // If time is considerably too short, ignore dig
3103                                         // Check time only for medium and slow timed digs
3104                                         if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
3105                                                 infostream<<"Server: NoCheat: "<<player->getName()
3106                                                                 <<" completed digging "
3107                                                                 <<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
3108                                                                 <<params.time<<"s; not digging."<<std::endl;
3109                                                 is_valid_dig = false;
3110                                         }
3111                                 }
3112
3113                                 /* Actually dig node */
3114
3115                                 if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
3116                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3117
3118                                 // Send unusual result (that is, node not being removed)
3119                                 if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3120                                 {
3121                                         // Re-send block to revert change on client-side
3122                                         RemoteClient *client = getClient(peer_id);
3123                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3124                                         client->SetBlockNotSent(blockpos);
3125                                 }
3126                         }
3127                 } // action == 2
3128
3129                 /*
3130                         3: place block or right-click object
3131                 */
3132                 else if(action == 3)
3133                 {
3134                         ItemStack item = playersao->getWieldedItem();
3135
3136                         // Reset build time counter
3137                         if(pointed.type == POINTEDTHING_NODE &&
3138                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3139                                 getClient(peer_id)->m_time_from_building = 0.0;
3140
3141                         if(pointed.type == POINTEDTHING_OBJECT)
3142                         {
3143                                 // Right click object
3144
3145                                 // Skip if object has been removed
3146                                 if(pointed_object->m_removed)
3147                                         return;
3148
3149                                 actionstream<<player->getName()<<" right-clicks object "
3150                                                 <<pointed.object_id<<": "
3151                                                 <<pointed_object->getDescription()<<std::endl;
3152
3153                                 // Do stuff
3154                                 pointed_object->rightClick(playersao);
3155                         }
3156                         else if(scriptapi_item_on_place(m_lua,
3157                                         item, playersao, pointed))
3158                         {
3159                                 // Placement was handled in lua
3160
3161                                 // Apply returned ItemStack
3162                                 playersao->setWieldedItem(item);
3163                         }
3164
3165                         // If item has node placement prediction, always send the above
3166                         // node to make sure the client knows what exactly happened
3167                         if(item.getDefinition(m_itemdef).node_placement_prediction != ""){
3168                                 RemoteClient *client = getClient(peer_id);
3169                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3170                                 client->SetBlockNotSent(blockpos);
3171                         }
3172                 } // action == 3
3173
3174                 /*
3175                         4: use
3176                 */
3177                 else if(action == 4)
3178                 {
3179                         ItemStack item = playersao->getWieldedItem();
3180
3181                         actionstream<<player->getName()<<" uses "<<item.name
3182                                         <<", pointing at "<<pointed.dump()<<std::endl;
3183
3184                         if(scriptapi_item_on_use(m_lua,
3185                                         item, playersao, pointed))
3186                         {
3187                                 // Apply returned ItemStack
3188                                 playersao->setWieldedItem(item);
3189                         }
3190
3191                 } // action == 4
3192
3193
3194                 /*
3195                         Catch invalid actions
3196                 */
3197                 else
3198                 {
3199                         infostream<<"WARNING: Server: Invalid action "
3200                                         <<action<<std::endl;
3201                 }
3202         }
3203         else if(command == TOSERVER_REMOVED_SOUNDS)
3204         {
3205                 std::string datastring((char*)&data[2], datasize-2);
3206                 std::istringstream is(datastring, std::ios_base::binary);
3207
3208                 int num = readU16(is);
3209                 for(int k=0; k<num; k++){
3210                         s32 id = readS32(is);
3211                         std::map<s32, ServerPlayingSound>::iterator i =
3212                                         m_playing_sounds.find(id);
3213                         if(i == m_playing_sounds.end())
3214                                 continue;
3215                         ServerPlayingSound &psound = i->second;
3216                         psound.clients.erase(peer_id);
3217                         if(psound.clients.size() == 0)
3218                                 m_playing_sounds.erase(i++);
3219                 }
3220         }
3221         else if(command == TOSERVER_NODEMETA_FIELDS)
3222         {
3223                 std::string datastring((char*)&data[2], datasize-2);
3224                 std::istringstream is(datastring, std::ios_base::binary);
3225
3226                 v3s16 p = readV3S16(is);
3227                 std::string formname = deSerializeString(is);
3228                 int num = readU16(is);
3229                 std::map<std::string, std::string> fields;
3230                 for(int k=0; k<num; k++){
3231                         std::string fieldname = deSerializeString(is);
3232                         std::string fieldvalue = deSerializeLongString(is);
3233                         fields[fieldname] = fieldvalue;
3234                 }
3235
3236                 // If something goes wrong, this player is to blame
3237                 RollbackScopeActor rollback_scope(m_rollback,
3238                                 std::string("player:")+player->getName());
3239
3240                 // Check the target node for rollback data; leave others unnoticed
3241                 RollbackNode rn_old(&m_env->getMap(), p, this);
3242
3243                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3244                                 playersao);
3245
3246                 // Report rollback data
3247                 RollbackNode rn_new(&m_env->getMap(), p, this);
3248                 if(rollback() && rn_new != rn_old){
3249                         RollbackAction action;
3250                         action.setSetNode(p, rn_old, rn_new);
3251                         rollback()->reportAction(action);
3252                 }
3253         }
3254         else if(command == TOSERVER_INVENTORY_FIELDS)
3255         {
3256                 std::string datastring((char*)&data[2], datasize-2);
3257                 std::istringstream is(datastring, std::ios_base::binary);
3258
3259                 std::string formname = deSerializeString(is);
3260                 int num = readU16(is);
3261                 std::map<std::string, std::string> fields;
3262                 for(int k=0; k<num; k++){
3263                         std::string fieldname = deSerializeString(is);
3264                         std::string fieldvalue = deSerializeLongString(is);
3265                         fields[fieldname] = fieldvalue;
3266                 }
3267
3268                 scriptapi_on_player_receive_fields(m_lua, playersao, formname, fields);
3269         }
3270         else
3271         {
3272                 infostream<<"Server::ProcessData(): Ignoring "
3273                                 "unknown command "<<command<<std::endl;
3274         }
3275
3276         } //try
3277         catch(SendFailedException &e)
3278         {
3279                 errorstream<<"Server::ProcessData(): SendFailedException: "
3280                                 <<"what="<<e.what()
3281                                 <<std::endl;
3282         }
3283 }
3284
3285 void Server::onMapEditEvent(MapEditEvent *event)
3286 {
3287         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3288         if(m_ignore_map_edit_events)
3289                 return;
3290         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3291                 return;
3292         MapEditEvent *e = event->clone();
3293         m_unsent_map_edit_queue.push_back(e);
3294 }
3295
3296 Inventory* Server::getInventory(const InventoryLocation &loc)
3297 {
3298         switch(loc.type){
3299         case InventoryLocation::UNDEFINED:
3300         {}
3301         break;
3302         case InventoryLocation::CURRENT_PLAYER:
3303         {}
3304         break;
3305         case InventoryLocation::PLAYER:
3306         {
3307                 Player *player = m_env->getPlayer(loc.name.c_str());
3308                 if(!player)
3309                         return NULL;
3310                 PlayerSAO *playersao = player->getPlayerSAO();
3311                 if(!playersao)
3312                         return NULL;
3313                 return playersao->getInventory();
3314         }
3315         break;
3316         case InventoryLocation::NODEMETA:
3317         {
3318                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3319                 if(!meta)
3320                         return NULL;
3321                 return meta->getInventory();
3322         }
3323         break;
3324         case InventoryLocation::DETACHED:
3325         {
3326                 if(m_detached_inventories.count(loc.name) == 0)
3327                         return NULL;
3328                 return m_detached_inventories[loc.name];
3329         }
3330         break;
3331         default:
3332                 assert(0);
3333         }
3334         return NULL;
3335 }
3336 void Server::setInventoryModified(const InventoryLocation &loc)
3337 {
3338         switch(loc.type){
3339         case InventoryLocation::UNDEFINED:
3340         {}
3341         break;
3342         case InventoryLocation::PLAYER:
3343         {
3344                 Player *player = m_env->getPlayer(loc.name.c_str());
3345                 if(!player)
3346                         return;
3347                 PlayerSAO *playersao = player->getPlayerSAO();
3348                 if(!playersao)
3349                         return;
3350                 playersao->m_inventory_not_sent = true;
3351                 playersao->m_wielded_item_not_sent = true;
3352         }
3353         break;
3354         case InventoryLocation::NODEMETA:
3355         {
3356                 v3s16 blockpos = getNodeBlockPos(loc.p);
3357
3358                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3359                 if(block)
3360                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3361
3362                 setBlockNotSent(blockpos);
3363         }
3364         break;
3365         case InventoryLocation::DETACHED:
3366         {
3367                 sendDetachedInventoryToAll(loc.name);
3368         }
3369         break;
3370         default:
3371                 assert(0);
3372         }
3373 }
3374
3375 core::list<PlayerInfo> Server::getPlayerInfo()
3376 {
3377         DSTACK(__FUNCTION_NAME);
3378         JMutexAutoLock envlock(m_env_mutex);
3379         JMutexAutoLock conlock(m_con_mutex);
3380
3381         core::list<PlayerInfo> list;
3382
3383         core::list<Player*> players = m_env->getPlayers();
3384
3385         core::list<Player*>::Iterator i;
3386         for(i = players.begin();
3387                         i != players.end(); i++)
3388         {
3389                 PlayerInfo info;
3390
3391                 Player *player = *i;
3392
3393                 try{
3394                         // Copy info from connection to info struct
3395                         info.id = player->peer_id;
3396                         info.address = m_con.GetPeerAddress(player->peer_id);
3397                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3398                 }
3399                 catch(con::PeerNotFoundException &e)
3400                 {
3401                         // Set dummy peer info
3402                         info.id = 0;
3403                         info.address = Address(0,0,0,0,0);
3404                         info.avg_rtt = 0.0;
3405                 }
3406
3407                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3408                 info.position = player->getPosition();
3409
3410                 list.push_back(info);
3411         }
3412
3413         return list;
3414 }
3415
3416
3417 void Server::peerAdded(con::Peer *peer)
3418 {
3419         DSTACK(__FUNCTION_NAME);
3420         verbosestream<<"Server::peerAdded(): peer->id="
3421                         <<peer->id<<std::endl;
3422
3423         PeerChange c;
3424         c.type = PEER_ADDED;
3425         c.peer_id = peer->id;
3426         c.timeout = false;
3427         m_peer_change_queue.push_back(c);
3428 }
3429
3430 void Server::deletingPeer(con::Peer *peer, bool timeout)
3431 {
3432         DSTACK(__FUNCTION_NAME);
3433         verbosestream<<"Server::deletingPeer(): peer->id="
3434                         <<peer->id<<", timeout="<<timeout<<std::endl;
3435
3436         PeerChange c;
3437         c.type = PEER_REMOVED;
3438         c.peer_id = peer->id;
3439         c.timeout = timeout;
3440         m_peer_change_queue.push_back(c);
3441 }
3442
3443 /*
3444         Static send methods
3445 */
3446
3447 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3448 {
3449         DSTACK(__FUNCTION_NAME);
3450         std::ostringstream os(std::ios_base::binary);
3451
3452         writeU16(os, TOCLIENT_HP);
3453         writeU8(os, hp);
3454
3455         // Make data buffer
3456         std::string s = os.str();
3457         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3458         // Send as reliable
3459         con.Send(peer_id, 0, data, true);
3460 }
3461
3462 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3463                 const std::wstring &reason)
3464 {
3465         DSTACK(__FUNCTION_NAME);
3466         std::ostringstream os(std::ios_base::binary);
3467
3468         writeU16(os, TOCLIENT_ACCESS_DENIED);
3469         os<<serializeWideString(reason);
3470
3471         // Make data buffer
3472         std::string s = os.str();
3473         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3474         // Send as reliable
3475         con.Send(peer_id, 0, data, true);
3476 }
3477
3478 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3479                 bool set_camera_point_target, v3f camera_point_target)
3480 {
3481         DSTACK(__FUNCTION_NAME);
3482         std::ostringstream os(std::ios_base::binary);
3483
3484         writeU16(os, TOCLIENT_DEATHSCREEN);
3485         writeU8(os, set_camera_point_target);
3486         writeV3F1000(os, camera_point_target);
3487
3488         // Make data buffer
3489         std::string s = os.str();
3490         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3491         // Send as reliable
3492         con.Send(peer_id, 0, data, true);
3493 }
3494
3495 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3496                 IItemDefManager *itemdef)
3497 {
3498         DSTACK(__FUNCTION_NAME);
3499         std::ostringstream os(std::ios_base::binary);
3500
3501         /*
3502                 u16 command
3503                 u32 length of the next item
3504                 zlib-compressed serialized ItemDefManager
3505         */
3506         writeU16(os, TOCLIENT_ITEMDEF);
3507         std::ostringstream tmp_os(std::ios::binary);
3508         itemdef->serialize(tmp_os);
3509         std::ostringstream tmp_os2(std::ios::binary);
3510         compressZlib(tmp_os.str(), tmp_os2);
3511         os<<serializeLongString(tmp_os2.str());
3512
3513         // Make data buffer
3514         std::string s = os.str();
3515         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3516                         <<"): size="<<s.size()<<std::endl;
3517         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3518         // Send as reliable
3519         con.Send(peer_id, 0, data, true);
3520 }
3521
3522 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3523                 INodeDefManager *nodedef)
3524 {
3525         DSTACK(__FUNCTION_NAME);
3526         std::ostringstream os(std::ios_base::binary);
3527
3528         /*
3529                 u16 command
3530                 u32 length of the next item
3531                 zlib-compressed serialized NodeDefManager
3532         */
3533         writeU16(os, TOCLIENT_NODEDEF);
3534         std::ostringstream tmp_os(std::ios::binary);
3535         nodedef->serialize(tmp_os);
3536         std::ostringstream tmp_os2(std::ios::binary);
3537         compressZlib(tmp_os.str(), tmp_os2);
3538         os<<serializeLongString(tmp_os2.str());
3539
3540         // Make data buffer
3541         std::string s = os.str();
3542         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3543                         <<"): size="<<s.size()<<std::endl;
3544         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3545         // Send as reliable
3546         con.Send(peer_id, 0, data, true);
3547 }
3548
3549 /*
3550         Non-static send methods
3551 */
3552
3553 void Server::SendInventory(u16 peer_id)
3554 {
3555         DSTACK(__FUNCTION_NAME);
3556
3557         PlayerSAO *playersao = getPlayerSAO(peer_id);
3558         assert(playersao);
3559
3560         playersao->m_inventory_not_sent = false;
3561
3562         /*
3563                 Serialize it
3564         */
3565
3566         std::ostringstream os;
3567         playersao->getInventory()->serialize(os);
3568
3569         std::string s = os.str();
3570
3571         SharedBuffer<u8> data(s.size()+2);
3572         writeU16(&data[0], TOCLIENT_INVENTORY);
3573         memcpy(&data[2], s.c_str(), s.size());
3574
3575         // Send as reliable
3576         m_con.Send(peer_id, 0, data, true);
3577 }
3578
3579 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3580 {
3581         DSTACK(__FUNCTION_NAME);
3582
3583         std::ostringstream os(std::ios_base::binary);
3584         u8 buf[12];
3585
3586         // Write command
3587         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3588         os.write((char*)buf, 2);
3589
3590         // Write length
3591         writeU16(buf, message.size());
3592         os.write((char*)buf, 2);
3593
3594         // Write string
3595         for(u32 i=0; i<message.size(); i++)
3596         {
3597                 u16 w = message[i];
3598                 writeU16(buf, w);
3599                 os.write((char*)buf, 2);
3600         }
3601
3602         // Make data buffer
3603         std::string s = os.str();
3604         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3605         // Send as reliable
3606         m_con.Send(peer_id, 0, data, true);
3607 }
3608
3609 void Server::BroadcastChatMessage(const std::wstring &message)
3610 {
3611         for(core::map<u16, RemoteClient*>::Iterator
3612                 i = m_clients.getIterator();
3613                 i.atEnd() == false; i++)
3614         {
3615                 // Get client and check that it is valid
3616                 RemoteClient *client = i.getNode()->getValue();
3617                 assert(client->peer_id == i.getNode()->getKey());
3618                 if(client->serialization_version == SER_FMT_VER_INVALID)
3619                         continue;
3620
3621                 SendChatMessage(client->peer_id, message);
3622         }
3623 }
3624
3625 void Server::SendPlayerHP(u16 peer_id)
3626 {
3627         DSTACK(__FUNCTION_NAME);
3628         PlayerSAO *playersao = getPlayerSAO(peer_id);
3629         assert(playersao);
3630         playersao->m_hp_not_sent = false;
3631         SendHP(m_con, peer_id, playersao->getHP());
3632 }
3633
3634 void Server::SendMovePlayer(u16 peer_id)
3635 {
3636         DSTACK(__FUNCTION_NAME);
3637         Player *player = m_env->getPlayer(peer_id);
3638         assert(player);
3639
3640         std::ostringstream os(std::ios_base::binary);
3641         writeU16(os, TOCLIENT_MOVE_PLAYER);
3642         writeV3F1000(os, player->getPosition());
3643         writeF1000(os, player->getPitch());
3644         writeF1000(os, player->getYaw());
3645
3646         {
3647                 v3f pos = player->getPosition();
3648                 f32 pitch = player->getPitch();
3649                 f32 yaw = player->getYaw();
3650                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3651                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3652                                 <<" pitch="<<pitch
3653                                 <<" yaw="<<yaw
3654                                 <<std::endl;
3655         }
3656
3657         // Make data buffer
3658         std::string s = os.str();
3659         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3660         // Send as reliable
3661         m_con.Send(peer_id, 0, data, true);
3662 }
3663
3664 void Server::SendPlayerPrivileges(u16 peer_id)
3665 {
3666         Player *player = m_env->getPlayer(peer_id);
3667         assert(player);
3668         if(player->peer_id == PEER_ID_INEXISTENT)
3669                 return;
3670
3671         std::set<std::string> privs;
3672         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3673
3674         std::ostringstream os(std::ios_base::binary);
3675         writeU16(os, TOCLIENT_PRIVILEGES);
3676         writeU16(os, privs.size());
3677         for(std::set<std::string>::const_iterator i = privs.begin();
3678                         i != privs.end(); i++){
3679                 os<<serializeString(*i);
3680         }
3681
3682         // Make data buffer
3683         std::string s = os.str();
3684         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3685         // Send as reliable
3686         m_con.Send(peer_id, 0, data, true);
3687 }
3688
3689 void Server::SendPlayerInventoryFormspec(u16 peer_id)
3690 {
3691         Player *player = m_env->getPlayer(peer_id);
3692         assert(player);
3693         if(player->peer_id == PEER_ID_INEXISTENT)
3694                 return;
3695
3696         std::ostringstream os(std::ios_base::binary);
3697         writeU16(os, TOCLIENT_INVENTORY_FORMSPEC);
3698         os<<serializeLongString(player->inventory_formspec);
3699
3700         // Make data buffer
3701         std::string s = os.str();
3702         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3703         // Send as reliable
3704         m_con.Send(peer_id, 0, data, true);
3705 }
3706
3707 s32 Server::playSound(const SimpleSoundSpec &spec,
3708                 const ServerSoundParams &params)
3709 {
3710         // Find out initial position of sound
3711         bool pos_exists = false;
3712         v3f pos = params.getPos(m_env, &pos_exists);
3713         // If position is not found while it should be, cancel sound
3714         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3715                 return -1;
3716         // Filter destination clients
3717         std::set<RemoteClient*> dst_clients;
3718         if(params.to_player != "")
3719         {
3720                 Player *player = m_env->getPlayer(params.to_player.c_str());
3721                 if(!player){
3722                         infostream<<"Server::playSound: Player \""<<params.to_player
3723                                         <<"\" not found"<<std::endl;
3724                         return -1;
3725                 }
3726                 if(player->peer_id == PEER_ID_INEXISTENT){
3727                         infostream<<"Server::playSound: Player \""<<params.to_player
3728                                         <<"\" not connected"<<std::endl;
3729                         return -1;
3730                 }
3731                 RemoteClient *client = getClient(player->peer_id);
3732                 dst_clients.insert(client);
3733         }
3734         else
3735         {
3736                 for(core::map<u16, RemoteClient*>::Iterator
3737                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3738                 {
3739                         RemoteClient *client = i.getNode()->getValue();
3740                         Player *player = m_env->getPlayer(client->peer_id);
3741                         if(!player)
3742                                 continue;
3743                         if(pos_exists){
3744                                 if(player->getPosition().getDistanceFrom(pos) >
3745                                                 params.max_hear_distance)
3746                                         continue;
3747                         }
3748                         dst_clients.insert(client);
3749                 }
3750         }
3751         if(dst_clients.size() == 0)
3752                 return -1;
3753         // Create the sound
3754         s32 id = m_next_sound_id++;
3755         // The sound will exist as a reference in m_playing_sounds
3756         m_playing_sounds[id] = ServerPlayingSound();
3757         ServerPlayingSound &psound = m_playing_sounds[id];
3758         psound.params = params;
3759         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3760                         i != dst_clients.end(); i++)
3761                 psound.clients.insert((*i)->peer_id);
3762         // Create packet
3763         std::ostringstream os(std::ios_base::binary);
3764         writeU16(os, TOCLIENT_PLAY_SOUND);
3765         writeS32(os, id);
3766         os<<serializeString(spec.name);
3767         writeF1000(os, spec.gain * params.gain);
3768         writeU8(os, params.type);
3769         writeV3F1000(os, pos);
3770         writeU16(os, params.object);
3771         writeU8(os, params.loop);
3772         // Make data buffer
3773         std::string s = os.str();
3774         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3775         // Send
3776         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3777                         i != dst_clients.end(); i++){
3778                 // Send as reliable
3779                 m_con.Send((*i)->peer_id, 0, data, true);
3780         }
3781         return id;
3782 }
3783 void Server::stopSound(s32 handle)
3784 {
3785         // Get sound reference
3786         std::map<s32, ServerPlayingSound>::iterator i =
3787                         m_playing_sounds.find(handle);
3788         if(i == m_playing_sounds.end())
3789                 return;
3790         ServerPlayingSound &psound = i->second;
3791         // Create packet
3792         std::ostringstream os(std::ios_base::binary);
3793         writeU16(os, TOCLIENT_STOP_SOUND);
3794         writeS32(os, handle);
3795         // Make data buffer
3796         std::string s = os.str();
3797         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3798         // Send
3799         for(std::set<u16>::iterator i = psound.clients.begin();
3800                         i != psound.clients.end(); i++){
3801                 // Send as reliable
3802                 m_con.Send(*i, 0, data, true);
3803         }
3804         // Remove sound reference
3805         m_playing_sounds.erase(i);
3806 }
3807
3808 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3809         core::list<u16> *far_players, float far_d_nodes)
3810 {
3811         float maxd = far_d_nodes*BS;
3812         v3f p_f = intToFloat(p, BS);
3813
3814         // Create packet
3815         u32 replysize = 8;
3816         SharedBuffer<u8> reply(replysize);
3817         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3818         writeS16(&reply[2], p.X);
3819         writeS16(&reply[4], p.Y);
3820         writeS16(&reply[6], p.Z);
3821
3822         for(core::map<u16, RemoteClient*>::Iterator
3823                 i = m_clients.getIterator();
3824                 i.atEnd() == false; i++)
3825         {
3826                 // Get client and check that it is valid
3827                 RemoteClient *client = i.getNode()->getValue();
3828                 assert(client->peer_id == i.getNode()->getKey());
3829                 if(client->serialization_version == SER_FMT_VER_INVALID)
3830                         continue;
3831
3832                 // Don't send if it's the same one
3833                 if(client->peer_id == ignore_id)
3834                         continue;
3835
3836                 if(far_players)
3837                 {
3838                         // Get player
3839                         Player *player = m_env->getPlayer(client->peer_id);
3840                         if(player)
3841                         {
3842                                 // If player is far away, only set modified blocks not sent
3843                                 v3f player_pos = player->getPosition();
3844                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3845                                 {
3846                                         far_players->push_back(client->peer_id);
3847                                         continue;
3848                                 }
3849                         }
3850                 }
3851
3852                 // Send as reliable
3853                 m_con.Send(client->peer_id, 0, reply, true);
3854         }
3855 }
3856
3857 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3858                 core::list<u16> *far_players, float far_d_nodes)
3859 {
3860         float maxd = far_d_nodes*BS;
3861         v3f p_f = intToFloat(p, BS);
3862
3863         for(core::map<u16, RemoteClient*>::Iterator
3864                 i = m_clients.getIterator();
3865                 i.atEnd() == false; i++)
3866         {
3867                 // Get client and check that it is valid
3868                 RemoteClient *client = i.getNode()->getValue();
3869                 assert(client->peer_id == i.getNode()->getKey());
3870                 if(client->serialization_version == SER_FMT_VER_INVALID)
3871                         continue;
3872
3873                 // Don't send if it's the same one
3874                 if(client->peer_id == ignore_id)
3875                         continue;
3876
3877                 if(far_players)
3878                 {
3879                         // Get player
3880                         Player *player = m_env->getPlayer(client->peer_id);
3881                         if(player)
3882                         {
3883                                 // If player is far away, only set modified blocks not sent
3884                                 v3f player_pos = player->getPosition();
3885                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3886                                 {
3887                                         far_players->push_back(client->peer_id);
3888                                         continue;
3889                                 }
3890                         }
3891                 }
3892
3893                 // Create packet
3894                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3895                 SharedBuffer<u8> reply(replysize);
3896                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3897                 writeS16(&reply[2], p.X);
3898                 writeS16(&reply[4], p.Y);
3899                 writeS16(&reply[6], p.Z);
3900                 n.serialize(&reply[8], client->serialization_version);
3901
3902                 // Send as reliable
3903                 m_con.Send(client->peer_id, 0, reply, true);
3904         }
3905 }
3906
3907 void Server::setBlockNotSent(v3s16 p)
3908 {
3909         for(core::map<u16, RemoteClient*>::Iterator
3910                 i = m_clients.getIterator();
3911                 i.atEnd()==false; i++)
3912         {
3913                 RemoteClient *client = i.getNode()->getValue();
3914                 client->SetBlockNotSent(p);
3915         }
3916 }
3917
3918 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3919 {
3920         DSTACK(__FUNCTION_NAME);
3921
3922         v3s16 p = block->getPos();
3923
3924 #if 0
3925         // Analyze it a bit
3926         bool completely_air = true;
3927         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3928         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3929         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3930         {
3931                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3932                 {
3933                         completely_air = false;
3934                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3935                 }
3936         }
3937
3938         // Print result
3939         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3940         if(completely_air)
3941                 infostream<<"[completely air] ";
3942         infostream<<std::endl;
3943 #endif
3944
3945         /*
3946                 Create a packet with the block in the right format
3947         */
3948
3949         std::ostringstream os(std::ios_base::binary);
3950         block->serialize(os, ver, false);
3951         std::string s = os.str();
3952         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3953
3954         u32 replysize = 8 + blockdata.getSize();
3955         SharedBuffer<u8> reply(replysize);
3956         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3957         writeS16(&reply[2], p.X);
3958         writeS16(&reply[4], p.Y);
3959         writeS16(&reply[6], p.Z);
3960         memcpy(&reply[8], *blockdata, blockdata.getSize());
3961
3962         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3963                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3964
3965         /*
3966                 Send packet
3967         */
3968         m_con.Send(peer_id, 1, reply, true);
3969 }
3970
3971 void Server::SendBlocks(float dtime)
3972 {
3973         DSTACK(__FUNCTION_NAME);
3974
3975         JMutexAutoLock envlock(m_env_mutex);
3976         JMutexAutoLock conlock(m_con_mutex);
3977
3978         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
3979
3980         core::array<PrioritySortedBlockTransfer> queue;
3981
3982         s32 total_sending = 0;
3983
3984         {
3985                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
3986
3987                 for(core::map<u16, RemoteClient*>::Iterator
3988                         i = m_clients.getIterator();
3989                         i.atEnd() == false; i++)
3990                 {
3991                         RemoteClient *client = i.getNode()->getValue();
3992                         assert(client->peer_id == i.getNode()->getKey());
3993
3994                         // If definitions and textures have not been sent, don't
3995                         // send MapBlocks either
3996                         if(!client->definitions_sent)
3997                                 continue;
3998
3999                         total_sending += client->SendingCount();
4000
4001                         if(client->serialization_version == SER_FMT_VER_INVALID)
4002                                 continue;
4003
4004                         client->GetNextBlocks(this, dtime, queue);
4005                 }
4006         }
4007
4008         // Sort.
4009         // Lowest priority number comes first.
4010         // Lowest is most important.
4011         queue.sort();
4012
4013         for(u32 i=0; i<queue.size(); i++)
4014         {
4015                 //TODO: Calculate limit dynamically
4016                 if(total_sending >= g_settings->getS32
4017                                 ("max_simultaneous_block_sends_server_total"))
4018                         break;
4019
4020                 PrioritySortedBlockTransfer q = queue[i];
4021
4022                 MapBlock *block = NULL;
4023                 try
4024                 {
4025                         block = m_env->getMap().getBlockNoCreate(q.pos);
4026                 }
4027                 catch(InvalidPositionException &e)
4028                 {
4029                         continue;
4030                 }
4031
4032                 RemoteClient *client = getClient(q.peer_id);
4033
4034                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
4035
4036                 client->SentBlock(q.pos);
4037
4038                 total_sending++;
4039         }
4040 }
4041
4042 void Server::fillMediaCache()
4043 {
4044         DSTACK(__FUNCTION_NAME);
4045
4046         infostream<<"Server: Calculating media file checksums"<<std::endl;
4047
4048         // Collect all media file paths
4049         std::list<std::string> paths;
4050         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4051                         i != m_mods.end(); i++){
4052                 const ModSpec &mod = *i;
4053                 paths.push_back(mod.path + DIR_DELIM + "textures");
4054                 paths.push_back(mod.path + DIR_DELIM + "sounds");
4055                 paths.push_back(mod.path + DIR_DELIM + "media");
4056                 paths.push_back(mod.path + DIR_DELIM + "models");
4057         }
4058         std::string path_all = "textures";
4059         paths.push_back(path_all + DIR_DELIM + "all");
4060
4061         // Collect media file information from paths into cache
4062         for(std::list<std::string>::iterator i = paths.begin();
4063                         i != paths.end(); i++)
4064         {
4065                 std::string mediapath = *i;
4066                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
4067                 for(u32 j=0; j<dirlist.size(); j++){
4068                         if(dirlist[j].dir) // Ignode dirs
4069                                 continue;
4070                         std::string filename = dirlist[j].name;
4071                         // If name contains illegal characters, ignore the file
4072                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
4073                                 infostream<<"Server: ignoring illegal file name: \""
4074                                                 <<filename<<"\""<<std::endl;
4075                                 continue;
4076                         }
4077                         // If name is not in a supported format, ignore it
4078                         const char *supported_ext[] = {
4079                                 ".png", ".jpg", ".bmp", ".tga",
4080                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
4081                                 ".ogg",
4082                                 ".x", ".b3d", ".md2", ".obj",
4083                                 NULL
4084                         };
4085                         if(removeStringEnd(filename, supported_ext) == ""){
4086                                 infostream<<"Server: ignoring unsupported file extension: \""
4087                                                 <<filename<<"\""<<std::endl;
4088                                 continue;
4089                         }
4090                         // Ok, attempt to load the file and add to cache
4091                         std::string filepath = mediapath + DIR_DELIM + filename;
4092                         // Read data
4093                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
4094                         if(fis.good() == false){
4095                                 errorstream<<"Server::fillMediaCache(): Could not open \""
4096                                                 <<filename<<"\" for reading"<<std::endl;
4097                                 continue;
4098                         }
4099                         std::ostringstream tmp_os(std::ios_base::binary);
4100                         bool bad = false;
4101                         for(;;){
4102                                 char buf[1024];
4103                                 fis.read(buf, 1024);
4104                                 std::streamsize len = fis.gcount();
4105                                 tmp_os.write(buf, len);
4106                                 if(fis.eof())
4107                                         break;
4108                                 if(!fis.good()){
4109                                         bad = true;
4110                                         break;
4111                                 }
4112                         }
4113                         if(bad){
4114                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
4115                                                 <<filename<<"\""<<std::endl;
4116                                 continue;
4117                         }
4118                         if(tmp_os.str().length() == 0){
4119                                 errorstream<<"Server::fillMediaCache(): Empty file \""
4120                                                 <<filepath<<"\""<<std::endl;
4121                                 continue;
4122                         }
4123
4124                         SHA1 sha1;
4125                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
4126
4127                         unsigned char *digest = sha1.getDigest();
4128                         std::string sha1_base64 = base64_encode(digest, 20);
4129                         std::string sha1_hex = hex_encode((char*)digest, 20);
4130                         free(digest);
4131
4132                         // Put in list
4133                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4134                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4135                 }
4136         }
4137 }
4138
4139 struct SendableMediaAnnouncement
4140 {
4141         std::string name;
4142         std::string sha1_digest;
4143
4144         SendableMediaAnnouncement(const std::string name_="",
4145                         const std::string sha1_digest_=""):
4146                 name(name_),
4147                 sha1_digest(sha1_digest_)
4148         {}
4149 };
4150
4151 void Server::sendMediaAnnouncement(u16 peer_id)
4152 {
4153         DSTACK(__FUNCTION_NAME);
4154
4155         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4156                         <<std::endl;
4157
4158         core::list<SendableMediaAnnouncement> file_announcements;
4159
4160         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4161                         i != m_media.end(); i++){
4162                 // Put in list
4163                 file_announcements.push_back(
4164                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4165         }
4166
4167         // Make packet
4168         std::ostringstream os(std::ios_base::binary);
4169
4170         /*
4171                 u16 command
4172                 u32 number of files
4173                 for each texture {
4174                         u16 length of name
4175                         string name
4176                         u16 length of sha1_digest
4177                         string sha1_digest
4178                 }
4179         */
4180
4181         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4182         writeU16(os, file_announcements.size());
4183
4184         for(core::list<SendableMediaAnnouncement>::Iterator
4185                         j = file_announcements.begin();
4186                         j != file_announcements.end(); j++){
4187                 os<<serializeString(j->name);
4188                 os<<serializeString(j->sha1_digest);
4189         }
4190
4191         // Make data buffer
4192         std::string s = os.str();
4193         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4194
4195         // Send as reliable
4196         m_con.Send(peer_id, 0, data, true);
4197
4198 }
4199
4200 struct SendableMedia
4201 {
4202         std::string name;
4203         std::string path;
4204         std::string data;
4205
4206         SendableMedia(const std::string &name_="", const std::string path_="",
4207                         const std::string &data_=""):
4208                 name(name_),
4209                 path(path_),
4210                 data(data_)
4211         {}
4212 };
4213
4214 void Server::sendRequestedMedia(u16 peer_id,
4215                 const core::list<MediaRequest> &tosend)
4216 {
4217         DSTACK(__FUNCTION_NAME);
4218
4219         verbosestream<<"Server::sendRequestedMedia(): "
4220                         <<"Sending files to client"<<std::endl;
4221
4222         /* Read files */
4223
4224         // Put 5kB in one bunch (this is not accurate)
4225         u32 bytes_per_bunch = 5000;
4226
4227         core::array< core::list<SendableMedia> > file_bunches;
4228         file_bunches.push_back(core::list<SendableMedia>());
4229
4230         u32 file_size_bunch_total = 0;
4231
4232         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4233                         i != tosend.end(); i++)
4234         {
4235                 if(m_media.find(i->name) == m_media.end()){
4236                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4237                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4238                         continue;
4239                 }
4240
4241                 //TODO get path + name
4242                 std::string tpath = m_media[(*i).name].path;
4243
4244                 // Read data
4245                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4246                 if(fis.good() == false){
4247                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4248                                         <<tpath<<"\" for reading"<<std::endl;
4249                         continue;
4250                 }
4251                 std::ostringstream tmp_os(std::ios_base::binary);
4252                 bool bad = false;
4253                 for(;;){
4254                         char buf[1024];
4255                         fis.read(buf, 1024);
4256                         std::streamsize len = fis.gcount();
4257                         tmp_os.write(buf, len);
4258                         file_size_bunch_total += len;
4259                         if(fis.eof())
4260                                 break;
4261                         if(!fis.good()){
4262                                 bad = true;
4263                                 break;
4264                         }
4265                 }
4266                 if(bad){
4267                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4268                                         <<(*i).name<<"\""<<std::endl;
4269                         continue;
4270                 }
4271                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4272                                 <<tname<<"\""<<std::endl;*/
4273                 // Put in list
4274                 file_bunches[file_bunches.size()-1].push_back(
4275                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4276
4277                 // Start next bunch if got enough data
4278                 if(file_size_bunch_total >= bytes_per_bunch){
4279                         file_bunches.push_back(core::list<SendableMedia>());
4280                         file_size_bunch_total = 0;
4281                 }
4282
4283         }
4284
4285         /* Create and send packets */
4286
4287         u32 num_bunches = file_bunches.size();
4288         for(u32 i=0; i<num_bunches; i++)
4289         {
4290                 std::ostringstream os(std::ios_base::binary);
4291
4292                 /*
4293                         u16 command
4294                         u16 total number of texture bunches
4295                         u16 index of this bunch
4296                         u32 number of files in this bunch
4297                         for each file {
4298                                 u16 length of name
4299                                 string name
4300                                 u32 length of data
4301                                 data
4302                         }
4303                 */
4304
4305                 writeU16(os, TOCLIENT_MEDIA);
4306                 writeU16(os, num_bunches);
4307                 writeU16(os, i);
4308                 writeU32(os, file_bunches[i].size());
4309
4310                 for(core::list<SendableMedia>::Iterator
4311                                 j = file_bunches[i].begin();
4312                                 j != file_bunches[i].end(); j++){
4313                         os<<serializeString(j->name);
4314                         os<<serializeLongString(j->data);
4315                 }
4316
4317                 // Make data buffer
4318                 std::string s = os.str();
4319                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4320                                 <<i<<"/"<<num_bunches
4321                                 <<" files="<<file_bunches[i].size()
4322                                 <<" size=" <<s.size()<<std::endl;
4323                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4324                 // Send as reliable
4325                 m_con.Send(peer_id, 0, data, true);
4326         }
4327 }
4328
4329 void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
4330 {
4331         if(m_detached_inventories.count(name) == 0){
4332                 errorstream<<__FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
4333                 return;
4334         }
4335         Inventory *inv = m_detached_inventories[name];
4336
4337         std::ostringstream os(std::ios_base::binary);
4338         writeU16(os, TOCLIENT_DETACHED_INVENTORY);
4339         os<<serializeString(name);
4340         inv->serialize(os);
4341
4342         // Make data buffer
4343         std::string s = os.str();
4344         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4345         // Send as reliable
4346         m_con.Send(peer_id, 0, data, true);
4347 }
4348
4349 void Server::sendDetachedInventoryToAll(const std::string &name)
4350 {
4351         DSTACK(__FUNCTION_NAME);
4352
4353         for(core::map<u16, RemoteClient*>::Iterator
4354                         i = m_clients.getIterator();
4355                         i.atEnd() == false; i++){
4356                 RemoteClient *client = i.getNode()->getValue();
4357                 sendDetachedInventory(name, client->peer_id);
4358         }
4359 }
4360
4361 void Server::sendDetachedInventories(u16 peer_id)
4362 {
4363         DSTACK(__FUNCTION_NAME);
4364
4365         for(std::map<std::string, Inventory*>::iterator
4366                         i = m_detached_inventories.begin();
4367                         i != m_detached_inventories.end(); i++){
4368                 const std::string &name = i->first;
4369                 //Inventory *inv = i->second;
4370                 sendDetachedInventory(name, peer_id);
4371         }
4372 }
4373
4374 /*
4375         Something random
4376 */
4377
4378 void Server::DiePlayer(u16 peer_id)
4379 {
4380         DSTACK(__FUNCTION_NAME);
4381
4382         PlayerSAO *playersao = getPlayerSAO(peer_id);
4383         assert(playersao);
4384
4385         infostream<<"Server::DiePlayer(): Player "
4386                         <<playersao->getPlayer()->getName()
4387                         <<" dies"<<std::endl;
4388
4389         playersao->setHP(0);
4390
4391         // Trigger scripted stuff
4392         scriptapi_on_dieplayer(m_lua, playersao);
4393
4394         SendPlayerHP(peer_id);
4395         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4396 }
4397
4398 void Server::RespawnPlayer(u16 peer_id)
4399 {
4400         DSTACK(__FUNCTION_NAME);
4401
4402         PlayerSAO *playersao = getPlayerSAO(peer_id);
4403         assert(playersao);
4404
4405         infostream<<"Server::RespawnPlayer(): Player "
4406                         <<playersao->getPlayer()->getName()
4407                         <<" respawns"<<std::endl;
4408
4409         playersao->setHP(PLAYER_MAX_HP);
4410
4411         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4412         if(!repositioned){
4413                 v3f pos = findSpawnPos(m_env->getServerMap());
4414                 playersao->setPos(pos);
4415         }
4416 }
4417
4418 void Server::UpdateCrafting(u16 peer_id)
4419 {
4420         DSTACK(__FUNCTION_NAME);
4421
4422         Player* player = m_env->getPlayer(peer_id);
4423         assert(player);
4424
4425         // Get a preview for crafting
4426         ItemStack preview;
4427         getCraftingResult(&player->inventory, preview, false, this);
4428
4429         // Put the new preview in
4430         InventoryList *plist = player->inventory.getList("craftpreview");
4431         assert(plist);
4432         assert(plist->getSize() >= 1);
4433         plist->changeItem(0, preview);
4434 }
4435
4436 RemoteClient* Server::getClient(u16 peer_id)
4437 {
4438         DSTACK(__FUNCTION_NAME);
4439         //JMutexAutoLock lock(m_con_mutex);
4440         core::map<u16, RemoteClient*>::Node *n;
4441         n = m_clients.find(peer_id);
4442         // A client should exist for all peers
4443         assert(n != NULL);
4444         return n->getValue();
4445 }
4446
4447 std::wstring Server::getStatusString()
4448 {
4449         std::wostringstream os(std::ios_base::binary);
4450         os<<L"# Server: ";
4451         // Version
4452         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4453         // Uptime
4454         os<<L", uptime="<<m_uptime.get();
4455         // Information about clients
4456         core::map<u16, RemoteClient*>::Iterator i;
4457         bool first;
4458         os<<L", clients={";
4459         for(i = m_clients.getIterator(), first = true;
4460                 i.atEnd() == false; i++)
4461         {
4462                 // Get client and check that it is valid
4463                 RemoteClient *client = i.getNode()->getValue();
4464                 assert(client->peer_id == i.getNode()->getKey());
4465                 if(client->serialization_version == SER_FMT_VER_INVALID)
4466                         continue;
4467                 // Get player
4468                 Player *player = m_env->getPlayer(client->peer_id);
4469                 // Get name of player
4470                 std::wstring name = L"unknown";
4471                 if(player != NULL)
4472                         name = narrow_to_wide(player->getName());
4473                 // Add name to information string
4474                 if(!first)
4475                         os<<L",";
4476                 else
4477                         first = false;
4478                 os<<name;
4479         }
4480         os<<L"}";
4481         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4482                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4483         if(g_settings->get("motd") != "")
4484                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4485         return os.str();
4486 }
4487
4488 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4489 {
4490         std::set<std::string> privs;
4491         scriptapi_get_auth(m_lua, name, NULL, &privs);
4492         return privs;
4493 }
4494
4495 bool Server::checkPriv(const std::string &name, const std::string &priv)
4496 {
4497         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4498         return (privs.count(priv) != 0);
4499 }
4500
4501 void Server::reportPrivsModified(const std::string &name)
4502 {
4503         if(name == ""){
4504                 for(core::map<u16, RemoteClient*>::Iterator
4505                                 i = m_clients.getIterator();
4506                                 i.atEnd() == false; i++){
4507                         RemoteClient *client = i.getNode()->getValue();
4508                         Player *player = m_env->getPlayer(client->peer_id);
4509                         reportPrivsModified(player->getName());
4510                 }
4511         } else {
4512                 Player *player = m_env->getPlayer(name.c_str());
4513                 if(!player)
4514                         return;
4515                 SendPlayerPrivileges(player->peer_id);
4516                 PlayerSAO *sao = player->getPlayerSAO();
4517                 if(!sao)
4518                         return;
4519                 sao->updatePrivileges(
4520                                 getPlayerEffectivePrivs(name),
4521                                 isSingleplayer());
4522         }
4523 }
4524
4525 void Server::reportInventoryFormspecModified(const std::string &name)
4526 {
4527         Player *player = m_env->getPlayer(name.c_str());
4528         if(!player)
4529                 return;
4530         SendPlayerInventoryFormspec(player->peer_id);
4531 }
4532
4533 // Saves g_settings to configpath given at initialization
4534 void Server::saveConfig()
4535 {
4536         if(m_path_config != "")
4537                 g_settings->updateConfigFile(m_path_config.c_str());
4538 }
4539
4540 void Server::notifyPlayer(const char *name, const std::wstring msg)
4541 {
4542         Player *player = m_env->getPlayer(name);
4543         if(!player)
4544                 return;
4545         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4546 }
4547
4548 void Server::notifyPlayers(const std::wstring msg)
4549 {
4550         BroadcastChatMessage(msg);
4551 }
4552
4553 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4554 {
4555         u8 flags = 0;
4556         if(!allow_generate)
4557                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4558         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4559 }
4560
4561 Inventory* Server::createDetachedInventory(const std::string &name)
4562 {
4563         if(m_detached_inventories.count(name) > 0){
4564                 infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
4565                 delete m_detached_inventories[name];
4566         } else {
4567                 infostream<<"Server creating detached inventory \""<<name<<"\""<<std::endl;
4568         }
4569         Inventory *inv = new Inventory(m_itemdef);
4570         assert(inv);
4571         m_detached_inventories[name] = inv;
4572         sendDetachedInventoryToAll(name);
4573         return inv;
4574 }
4575
4576 class BoolScopeSet
4577 {
4578 public:
4579         BoolScopeSet(bool *dst, bool val):
4580                 m_dst(dst)
4581         {
4582                 m_orig_state = *m_dst;
4583                 *m_dst = val;
4584         }
4585         ~BoolScopeSet()
4586         {
4587                 *m_dst = m_orig_state;
4588         }
4589 private:
4590         bool *m_dst;
4591         bool m_orig_state;
4592 };
4593
4594 // actions: time-reversed list
4595 // Return value: success/failure
4596 bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
4597                 std::list<std::string> *log)
4598 {
4599         infostream<<"Server::rollbackRevertActions(len="<<actions.size()<<")"<<std::endl;
4600         ServerMap *map = (ServerMap*)(&m_env->getMap());
4601         // Disable rollback report sink while reverting
4602         BoolScopeSet rollback_scope_disable(&m_rollback_sink_enabled, false);
4603
4604         // Fail if no actions to handle
4605         if(actions.empty()){
4606                 log->push_back("Nothing to do.");
4607                 return false;
4608         }
4609
4610         int num_tried = 0;
4611         int num_failed = 0;
4612
4613         for(std::list<RollbackAction>::const_iterator
4614                         i = actions.begin();
4615                         i != actions.end(); i++)
4616         {
4617                 const RollbackAction &action = *i;
4618                 num_tried++;
4619                 bool success = action.applyRevert(map, this, this);
4620                 if(!success){
4621                         num_failed++;
4622                         std::ostringstream os;
4623                         os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
4624                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4625                         if(log)
4626                                 log->push_back(os.str());
4627                 }else{
4628                         std::ostringstream os;
4629                         os<<"Succesfully reverted step ("<<num_tried<<") "<<action.toString();
4630                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4631                         if(log)
4632                                 log->push_back(os.str());
4633                 }
4634         }
4635
4636         infostream<<"Map::rollbackRevertActions(): "<<num_failed<<"/"<<num_tried
4637                         <<" failed"<<std::endl;
4638
4639         // Call it done if less than half failed
4640         return num_failed <= num_tried/2;
4641 }
4642
4643 // IGameDef interface
4644 // Under envlock
4645 IItemDefManager* Server::getItemDefManager()
4646 {
4647         return m_itemdef;
4648 }
4649 INodeDefManager* Server::getNodeDefManager()
4650 {
4651         return m_nodedef;
4652 }
4653 ICraftDefManager* Server::getCraftDefManager()
4654 {
4655         return m_craftdef;
4656 }
4657 ITextureSource* Server::getTextureSource()
4658 {
4659         return NULL;
4660 }
4661 u16 Server::allocateUnknownNodeId(const std::string &name)
4662 {
4663         return m_nodedef->allocateDummy(name);
4664 }
4665 ISoundManager* Server::getSoundManager()
4666 {
4667         return &dummySoundManager;
4668 }
4669 MtEventManager* Server::getEventManager()
4670 {
4671         return m_event;
4672 }
4673 IRollbackReportSink* Server::getRollbackReportSink()
4674 {
4675         if(!m_enable_rollback_recording)
4676                 return NULL;
4677         if(!m_rollback_sink_enabled)
4678                 return NULL;
4679         return m_rollback;
4680 }
4681
4682 IWritableItemDefManager* Server::getWritableItemDefManager()
4683 {
4684         return m_itemdef;
4685 }
4686 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4687 {
4688         return m_nodedef;
4689 }
4690 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4691 {
4692         return m_craftdef;
4693 }
4694
4695 const ModSpec* Server::getModSpec(const std::string &modname)
4696 {
4697         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4698                         i != m_mods.end(); i++){
4699                 const ModSpec &mod = *i;
4700                 if(mod.name == modname)
4701                         return &mod;
4702         }
4703         return NULL;
4704 }
4705 void Server::getModNames(core::list<std::string> &modlist)
4706 {
4707         for(core::list<ModSpec>::Iterator i = m_mods.begin(); i != m_mods.end(); i++)
4708         {
4709                 modlist.push_back((*i).name);
4710         }
4711 }
4712 std::string Server::getBuiltinLuaPath()
4713 {
4714         return porting::path_share + DIR_DELIM + "builtin";
4715 }
4716
4717 v3f findSpawnPos(ServerMap &map)
4718 {
4719         //return v3f(50,50,50)*BS;
4720
4721         v3s16 nodepos;
4722
4723 #if 0
4724         nodepos = v2s16(0,0);
4725         groundheight = 20;
4726 #endif
4727
4728 #if 1
4729         // Try to find a good place a few times
4730         for(s32 i=0; i<1000; i++)
4731         {
4732                 s32 range = 1 + i;
4733                 // We're going to try to throw the player to this position
4734                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4735                                 -range + (myrand()%(range*2)));
4736                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4737                 // Get ground height at point (fallbacks to heightmap function)
4738                 s16 groundheight = map.findGroundLevel(nodepos2d);
4739                 // Don't go underwater
4740                 if(groundheight < WATER_LEVEL)
4741                 {
4742                         //infostream<<"-> Underwater"<<std::endl;
4743                         continue;
4744                 }
4745                 // Don't go to high places
4746                 if(groundheight > WATER_LEVEL + 4)
4747                 {
4748                         //infostream<<"-> Underwater"<<std::endl;
4749                         continue;
4750                 }
4751
4752                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4753                 bool is_good = false;
4754                 s32 air_count = 0;
4755                 for(s32 i=0; i<10; i++){
4756                         v3s16 blockpos = getNodeBlockPos(nodepos);
4757                         map.emergeBlock(blockpos, true);
4758                         MapNode n = map.getNodeNoEx(nodepos);
4759                         if(n.getContent() == CONTENT_AIR){
4760                                 air_count++;
4761                                 if(air_count >= 2){
4762                                         is_good = true;
4763                                         nodepos.Y -= 1;
4764                                         break;
4765                                 }
4766                         }
4767                         nodepos.Y++;
4768                 }
4769                 if(is_good){
4770                         // Found a good place
4771                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4772                         break;
4773                 }
4774         }
4775 #endif
4776
4777         return intToFloat(nodepos, BS);
4778 }
4779
4780 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4781 {
4782         RemotePlayer *player = NULL;
4783         bool newplayer = false;
4784
4785         /*
4786                 Try to get an existing player
4787         */
4788         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4789
4790         // If player is already connected, cancel
4791         if(player != NULL && player->peer_id != 0)
4792         {
4793                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4794                 return NULL;
4795         }
4796
4797         /*
4798                 If player with the wanted peer_id already exists, cancel.
4799         */
4800         if(m_env->getPlayer(peer_id) != NULL)
4801         {
4802                 infostream<<"emergePlayer(): Player with wrong name but same"
4803                                 " peer_id already exists"<<std::endl;
4804                 return NULL;
4805         }
4806
4807         /*
4808                 Create a new player if it doesn't exist yet
4809         */
4810         if(player == NULL)
4811         {
4812                 newplayer = true;
4813                 player = new RemotePlayer(this);
4814                 player->updateName(name);
4815
4816                 /* Set player position */
4817                 infostream<<"Server: Finding spawn place for player \""
4818                                 <<name<<"\""<<std::endl;
4819                 v3f pos = findSpawnPos(m_env->getServerMap());
4820                 player->setPosition(pos);
4821
4822                 /* Add player to environment */
4823                 m_env->addPlayer(player);
4824         }
4825
4826         /*
4827                 Create a new player active object
4828         */
4829         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4830                         getPlayerEffectivePrivs(player->getName()),
4831                         isSingleplayer());
4832
4833         /* Add object to environment */
4834         m_env->addActiveObject(playersao);
4835
4836         /* Run scripts */
4837         if(newplayer)
4838                 scriptapi_on_newplayer(m_lua, playersao);
4839
4840         scriptapi_on_joinplayer(m_lua, playersao);
4841
4842         return playersao;
4843 }
4844
4845 void Server::handlePeerChange(PeerChange &c)
4846 {
4847         JMutexAutoLock envlock(m_env_mutex);
4848         JMutexAutoLock conlock(m_con_mutex);
4849
4850         if(c.type == PEER_ADDED)
4851         {
4852                 /*
4853                         Add
4854                 */
4855
4856                 // Error check
4857                 core::map<u16, RemoteClient*>::Node *n;
4858                 n = m_clients.find(c.peer_id);
4859                 // The client shouldn't already exist
4860                 assert(n == NULL);
4861
4862                 // Create client
4863                 RemoteClient *client = new RemoteClient();
4864                 client->peer_id = c.peer_id;
4865                 m_clients.insert(client->peer_id, client);
4866
4867         } // PEER_ADDED
4868         else if(c.type == PEER_REMOVED)
4869         {
4870                 /*
4871                         Delete
4872                 */
4873
4874                 // Error check
4875                 core::map<u16, RemoteClient*>::Node *n;
4876                 n = m_clients.find(c.peer_id);
4877                 // The client should exist
4878                 assert(n != NULL);
4879
4880                 /*
4881                         Mark objects to be not known by the client
4882                 */
4883                 RemoteClient *client = n->getValue();
4884                 // Handle objects
4885                 for(core::map<u16, bool>::Iterator
4886                                 i = client->m_known_objects.getIterator();
4887                                 i.atEnd()==false; i++)
4888                 {
4889                         // Get object
4890                         u16 id = i.getNode()->getKey();
4891                         ServerActiveObject* obj = m_env->getActiveObject(id);
4892
4893                         if(obj && obj->m_known_by_count > 0)
4894                                 obj->m_known_by_count--;
4895                 }
4896
4897                 /*
4898                         Clear references to playing sounds
4899                 */
4900                 for(std::map<s32, ServerPlayingSound>::iterator
4901                                 i = m_playing_sounds.begin();
4902                                 i != m_playing_sounds.end();)
4903                 {
4904                         ServerPlayingSound &psound = i->second;
4905                         psound.clients.erase(c.peer_id);
4906                         if(psound.clients.size() == 0)
4907                                 m_playing_sounds.erase(i++);
4908                         else
4909                                 i++;
4910                 }
4911
4912                 Player *player = m_env->getPlayer(c.peer_id);
4913
4914                 // Collect information about leaving in chat
4915                 std::wstring message;
4916                 {
4917                         if(player != NULL)
4918                         {
4919                                 std::wstring name = narrow_to_wide(player->getName());
4920                                 message += L"*** ";
4921                                 message += name;
4922                                 message += L" left the game.";
4923                                 if(c.timeout)
4924                                         message += L" (timed out)";
4925                         }
4926                 }
4927
4928                 /* Run scripts and remove from environment */
4929                 {
4930                         if(player != NULL)
4931                         {
4932                                 PlayerSAO *playersao = player->getPlayerSAO();
4933                                 assert(playersao);
4934
4935                                 scriptapi_on_leaveplayer(m_lua, playersao);
4936
4937                                 playersao->disconnected();
4938                         }
4939                 }
4940
4941                 /*
4942                         Print out action
4943                 */
4944                 {
4945                         if(player != NULL)
4946                         {
4947                                 std::ostringstream os(std::ios_base::binary);
4948                                 for(core::map<u16, RemoteClient*>::Iterator
4949                                         i = m_clients.getIterator();
4950                                         i.atEnd() == false; i++)
4951                                 {
4952                                         RemoteClient *client = i.getNode()->getValue();
4953                                         assert(client->peer_id == i.getNode()->getKey());
4954                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4955                                                 continue;
4956                                         // Get player
4957                                         Player *player = m_env->getPlayer(client->peer_id);
4958                                         if(!player)
4959                                                 continue;
4960                                         // Get name of player
4961                                         os<<player->getName()<<" ";
4962                                 }
4963
4964                                 actionstream<<player->getName()<<" "
4965                                                 <<(c.timeout?"times out.":"leaves game.")
4966                                                 <<" List of players: "
4967                                                 <<os.str()<<std::endl;
4968                         }
4969                 }
4970
4971                 // Delete client
4972                 delete m_clients[c.peer_id];
4973                 m_clients.remove(c.peer_id);
4974
4975                 // Send player info to all remaining clients
4976                 //SendPlayerInfos();
4977
4978                 // Send leave chat message to all remaining clients
4979                 if(message.length() != 0)
4980                         BroadcastChatMessage(message);
4981
4982         } // PEER_REMOVED
4983         else
4984         {
4985                 assert(0);
4986         }
4987 }
4988
4989 void Server::handlePeerChanges()
4990 {
4991         while(m_peer_change_queue.size() > 0)
4992         {
4993                 PeerChange c = m_peer_change_queue.pop_front();
4994
4995                 verbosestream<<"Server: Handling peer change: "
4996                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
4997                                 <<std::endl;
4998
4999                 handlePeerChange(c);
5000         }
5001 }
5002
5003 void dedicated_server_loop(Server &server, bool &kill)
5004 {
5005         DSTACK(__FUNCTION_NAME);
5006
5007         verbosestream<<"dedicated_server_loop()"<<std::endl;
5008
5009         IntervalLimiter m_profiler_interval;
5010
5011         for(;;)
5012         {
5013                 float steplen = g_settings->getFloat("dedicated_server_step");
5014                 // This is kind of a hack but can be done like this
5015                 // because server.step() is very light
5016                 {
5017                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
5018                         sleep_ms((int)(steplen*1000.0));
5019                 }
5020                 server.step(steplen);
5021
5022                 if(server.getShutdownRequested() || kill)
5023                 {
5024                         infostream<<"Dedicated server quitting"<<std::endl;
5025                         break;
5026                 }
5027
5028                 /*
5029                         Profiler
5030                 */
5031                 float profiler_print_interval =
5032                                 g_settings->getFloat("profiler_print_interval");
5033                 if(profiler_print_interval != 0)
5034                 {
5035                         if(m_profiler_interval.step(steplen, profiler_print_interval))
5036                         {
5037                                 infostream<<"Profiler:"<<std::endl;
5038                                 g_profiler->print(infostream);
5039                                 g_profiler->clear();
5040                         }
5041                 }
5042         }
5043 }
5044
5045