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                 JMutexAutoLock conlock(m_con_mutex);
1119
1120                 /*
1121                         Execute script shutdown hooks
1122                 */
1123                 scriptapi_on_shutdown(m_lua);
1124         }
1125
1126         {
1127                 JMutexAutoLock envlock(m_env_mutex);
1128
1129                 /*
1130                         Save players
1131                 */
1132                 infostream<<"Server: Saving players"<<std::endl;
1133                 m_env->serializePlayers(m_path_world);
1134
1135                 /*
1136                         Save environment metadata
1137                 */
1138                 infostream<<"Server: Saving environment metadata"<<std::endl;
1139                 m_env->saveMeta(m_path_world);
1140         }
1141
1142         /*
1143                 Stop threads
1144         */
1145         stop();
1146
1147         /*
1148                 Delete clients
1149         */
1150         {
1151                 JMutexAutoLock clientslock(m_con_mutex);
1152
1153                 for(core::map<u16, RemoteClient*>::Iterator
1154                         i = m_clients.getIterator();
1155                         i.atEnd() == false; i++)
1156                 {
1157                         // Delete client
1158                         delete i.getNode()->getValue();
1159                 }
1160         }
1161
1162         // Delete things in the reverse order of creation
1163         delete m_env;
1164         delete m_rollback;
1165         delete m_event;
1166         delete m_itemdef;
1167         delete m_nodedef;
1168         delete m_craftdef;
1169
1170         // Deinitialize scripting
1171         infostream<<"Server: Deinitializing scripting"<<std::endl;
1172         script_deinit(m_lua);
1173
1174         // Delete detached inventories
1175         {
1176                 for(std::map<std::string, Inventory*>::iterator
1177                                 i = m_detached_inventories.begin();
1178                                 i != m_detached_inventories.end(); i++){
1179                         delete i->second;
1180                 }
1181         }
1182 }
1183
1184 void Server::start(unsigned short port)
1185 {
1186         DSTACK(__FUNCTION_NAME);
1187         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1188
1189         // Stop thread if already running
1190         m_thread.stop();
1191
1192         // Initialize connection
1193         m_con.SetTimeoutMs(30);
1194         m_con.Serve(port);
1195
1196         // Start thread
1197         m_thread.setRun(true);
1198         m_thread.Start();
1199
1200         // ASCII art for the win!
1201         actionstream
1202         <<"        .__               __                   __   "<<std::endl
1203         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1204         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1205         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1206         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1207         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1208         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1209         actionstream<<"Server for gameid=\""<<m_gamespec.id
1210                         <<"\" listening on port "<<port<<"."<<std::endl;
1211 }
1212
1213 void Server::stop()
1214 {
1215         DSTACK(__FUNCTION_NAME);
1216
1217         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1218
1219         // Stop threads (set run=false first so both start stopping)
1220         m_thread.setRun(false);
1221         m_emergethread.setRun(false);
1222         m_thread.stop();
1223         m_emergethread.stop();
1224
1225         infostream<<"Server: Threads stopped"<<std::endl;
1226 }
1227
1228 void Server::step(float dtime)
1229 {
1230         DSTACK(__FUNCTION_NAME);
1231         // Limit a bit
1232         if(dtime > 2.0)
1233                 dtime = 2.0;
1234         {
1235                 JMutexAutoLock lock(m_step_dtime_mutex);
1236                 m_step_dtime += dtime;
1237         }
1238         // Throw if fatal error occurred in thread
1239         std::string async_err = m_async_fatal_error.get();
1240         if(async_err != ""){
1241                 throw ServerError(async_err);
1242         }
1243 }
1244
1245 void Server::AsyncRunStep()
1246 {
1247         DSTACK(__FUNCTION_NAME);
1248
1249         g_profiler->add("Server::AsyncRunStep (num)", 1);
1250
1251         float dtime;
1252         {
1253                 JMutexAutoLock lock1(m_step_dtime_mutex);
1254                 dtime = m_step_dtime;
1255         }
1256
1257         {
1258                 // Send blocks to clients
1259                 SendBlocks(dtime);
1260         }
1261
1262         if(dtime < 0.001)
1263                 return;
1264
1265         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1266
1267         //infostream<<"Server steps "<<dtime<<std::endl;
1268         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1269
1270         {
1271                 JMutexAutoLock lock1(m_step_dtime_mutex);
1272                 m_step_dtime -= dtime;
1273         }
1274
1275         /*
1276                 Update uptime
1277         */
1278         {
1279                 m_uptime.set(m_uptime.get() + dtime);
1280         }
1281
1282         {
1283                 // Process connection's timeouts
1284                 JMutexAutoLock lock2(m_con_mutex);
1285                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1286                 m_con.RunTimeouts(dtime);
1287         }
1288
1289         {
1290                 // This has to be called so that the client list gets synced
1291                 // with the peer list of the connection
1292                 handlePeerChanges();
1293         }
1294
1295         /*
1296                 Update time of day and overall game time
1297         */
1298         {
1299                 JMutexAutoLock envlock(m_env_mutex);
1300
1301                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1302
1303                 /*
1304                         Send to clients at constant intervals
1305                 */
1306
1307                 m_time_of_day_send_timer -= dtime;
1308                 if(m_time_of_day_send_timer < 0.0)
1309                 {
1310                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1311
1312                         //JMutexAutoLock envlock(m_env_mutex);
1313                         JMutexAutoLock conlock(m_con_mutex);
1314
1315                         for(core::map<u16, RemoteClient*>::Iterator
1316                                 i = m_clients.getIterator();
1317                                 i.atEnd() == false; i++)
1318                         {
1319                                 RemoteClient *client = i.getNode()->getValue();
1320                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1321                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1322                                 // Send as reliable
1323                                 m_con.Send(client->peer_id, 0, data, true);
1324                         }
1325                 }
1326         }
1327
1328         {
1329                 JMutexAutoLock lock(m_env_mutex);
1330                 // Step environment
1331                 ScopeProfiler sp(g_profiler, "SEnv step");
1332                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1333                 m_env->step(dtime);
1334         }
1335
1336         const float map_timer_and_unload_dtime = 2.92;
1337         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1338         {
1339                 JMutexAutoLock lock(m_env_mutex);
1340                 // Run Map's timers and unload unused data
1341                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1342                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1343                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1344         }
1345
1346         /*
1347                 Do background stuff
1348         */
1349
1350         /*
1351                 Handle players
1352         */
1353         {
1354                 JMutexAutoLock lock(m_env_mutex);
1355                 JMutexAutoLock lock2(m_con_mutex);
1356
1357                 ScopeProfiler sp(g_profiler, "Server: handle players");
1358
1359                 for(core::map<u16, RemoteClient*>::Iterator
1360                         i = m_clients.getIterator();
1361                         i.atEnd() == false; i++)
1362                 {
1363                         RemoteClient *client = i.getNode()->getValue();
1364                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1365                         if(playersao == NULL)
1366                                 continue;
1367
1368                         /*
1369                                 Handle player HPs (die if hp=0)
1370                         */
1371                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1372                                 DiePlayer(client->peer_id);
1373
1374                         /*
1375                                 Send player inventories and HPs if necessary
1376                         */
1377                         if(playersao->m_moved){
1378                                 SendMovePlayer(client->peer_id);
1379                                 playersao->m_moved = false;
1380                         }
1381                         if(playersao->m_inventory_not_sent){
1382                                 UpdateCrafting(client->peer_id);
1383                                 SendInventory(client->peer_id);
1384                         }
1385                         if(playersao->m_hp_not_sent){
1386                                 SendPlayerHP(client->peer_id);
1387                         }
1388                 }
1389         }
1390
1391         /* Transform liquids */
1392         m_liquid_transform_timer += dtime;
1393         if(m_liquid_transform_timer >= 1.00)
1394         {
1395                 m_liquid_transform_timer -= 1.00;
1396
1397                 JMutexAutoLock lock(m_env_mutex);
1398
1399                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1400
1401                 core::map<v3s16, MapBlock*> modified_blocks;
1402                 m_env->getMap().transformLiquids(modified_blocks);
1403 #if 0
1404                 /*
1405                         Update lighting
1406                 */
1407                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1408                 ServerMap &map = ((ServerMap&)m_env->getMap());
1409                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1410
1411                 // Add blocks modified by lighting to modified_blocks
1412                 for(core::map<v3s16, MapBlock*>::Iterator
1413                                 i = lighting_modified_blocks.getIterator();
1414                                 i.atEnd() == false; i++)
1415                 {
1416                         MapBlock *block = i.getNode()->getValue();
1417                         modified_blocks.insert(block->getPos(), block);
1418                 }
1419 #endif
1420                 /*
1421                         Set the modified blocks unsent for all the clients
1422                 */
1423
1424                 JMutexAutoLock lock2(m_con_mutex);
1425
1426                 for(core::map<u16, RemoteClient*>::Iterator
1427                                 i = m_clients.getIterator();
1428                                 i.atEnd() == false; i++)
1429                 {
1430                         RemoteClient *client = i.getNode()->getValue();
1431
1432                         if(modified_blocks.size() > 0)
1433                         {
1434                                 // Remove block from sent history
1435                                 client->SetBlocksNotSent(modified_blocks);
1436                         }
1437                 }
1438         }
1439
1440         // Periodically print some info
1441         {
1442                 float &counter = m_print_info_timer;
1443                 counter += dtime;
1444                 if(counter >= 30.0)
1445                 {
1446                         counter = 0.0;
1447
1448                         JMutexAutoLock lock2(m_con_mutex);
1449
1450                         if(m_clients.size() != 0)
1451                                 infostream<<"Players:"<<std::endl;
1452                         for(core::map<u16, RemoteClient*>::Iterator
1453                                 i = m_clients.getIterator();
1454                                 i.atEnd() == false; i++)
1455                         {
1456                                 //u16 peer_id = i.getNode()->getKey();
1457                                 RemoteClient *client = i.getNode()->getValue();
1458                                 Player *player = m_env->getPlayer(client->peer_id);
1459                                 if(player==NULL)
1460                                         continue;
1461                                 infostream<<"* "<<player->getName()<<"\t";
1462                                 client->PrintInfo(infostream);
1463                         }
1464                 }
1465         }
1466
1467         //if(g_settings->getBool("enable_experimental"))
1468         {
1469
1470         /*
1471                 Check added and deleted active objects
1472         */
1473         {
1474                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1475                 JMutexAutoLock envlock(m_env_mutex);
1476                 JMutexAutoLock conlock(m_con_mutex);
1477
1478                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1479
1480                 // Radius inside which objects are active
1481                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1482                 radius *= MAP_BLOCKSIZE;
1483
1484                 for(core::map<u16, RemoteClient*>::Iterator
1485                         i = m_clients.getIterator();
1486                         i.atEnd() == false; i++)
1487                 {
1488                         RemoteClient *client = i.getNode()->getValue();
1489
1490                         // If definitions and textures have not been sent, don't
1491                         // send objects either
1492                         if(!client->definitions_sent)
1493                                 continue;
1494
1495                         Player *player = m_env->getPlayer(client->peer_id);
1496                         if(player==NULL)
1497                         {
1498                                 // This can happen if the client timeouts somehow
1499                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1500                                                 <<client->peer_id
1501                                                 <<" has no associated player"<<std::endl;*/
1502                                 continue;
1503                         }
1504                         v3s16 pos = floatToInt(player->getPosition(), BS);
1505
1506                         core::map<u16, bool> removed_objects;
1507                         core::map<u16, bool> added_objects;
1508                         m_env->getRemovedActiveObjects(pos, radius,
1509                                         client->m_known_objects, removed_objects);
1510                         m_env->getAddedActiveObjects(pos, radius,
1511                                         client->m_known_objects, added_objects);
1512
1513                         // Ignore if nothing happened
1514                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1515                         {
1516                                 //infostream<<"active objects: none changed"<<std::endl;
1517                                 continue;
1518                         }
1519
1520                         std::string data_buffer;
1521
1522                         char buf[4];
1523
1524                         // Handle removed objects
1525                         writeU16((u8*)buf, removed_objects.size());
1526                         data_buffer.append(buf, 2);
1527                         for(core::map<u16, bool>::Iterator
1528                                         i = removed_objects.getIterator();
1529                                         i.atEnd()==false; i++)
1530                         {
1531                                 // Get object
1532                                 u16 id = i.getNode()->getKey();
1533                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1534
1535                                 // Add to data buffer for sending
1536                                 writeU16((u8*)buf, i.getNode()->getKey());
1537                                 data_buffer.append(buf, 2);
1538
1539                                 // Remove from known objects
1540                                 client->m_known_objects.remove(i.getNode()->getKey());
1541
1542                                 if(obj && obj->m_known_by_count > 0)
1543                                         obj->m_known_by_count--;
1544                         }
1545
1546                         // Handle added objects
1547                         writeU16((u8*)buf, added_objects.size());
1548                         data_buffer.append(buf, 2);
1549                         for(core::map<u16, bool>::Iterator
1550                                         i = added_objects.getIterator();
1551                                         i.atEnd()==false; i++)
1552                         {
1553                                 // Get object
1554                                 u16 id = i.getNode()->getKey();
1555                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1556
1557                                 // Get object type
1558                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1559                                 if(obj == NULL)
1560                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1561                                                         <<": NULL object"<<std::endl;
1562                                 else
1563                                         type = obj->getSendType();
1564
1565                                 // Add to data buffer for sending
1566                                 writeU16((u8*)buf, id);
1567                                 data_buffer.append(buf, 2);
1568                                 writeU8((u8*)buf, type);
1569                                 data_buffer.append(buf, 1);
1570
1571                                 if(obj)
1572                                         data_buffer.append(serializeLongString(
1573                                                         obj->getClientInitializationData(client->net_proto_version)));
1574                                 else
1575                                         data_buffer.append(serializeLongString(""));
1576
1577                                 // Add to known objects
1578                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1579
1580                                 if(obj)
1581                                         obj->m_known_by_count++;
1582                         }
1583
1584                         // Send packet
1585                         SharedBuffer<u8> reply(2 + data_buffer.size());
1586                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1587                         memcpy((char*)&reply[2], data_buffer.c_str(),
1588                                         data_buffer.size());
1589                         // Send as reliable
1590                         m_con.Send(client->peer_id, 0, reply, true);
1591
1592                         verbosestream<<"Server: Sent object remove/add: "
1593                                         <<removed_objects.size()<<" removed, "
1594                                         <<added_objects.size()<<" added, "
1595                                         <<"packet size is "<<reply.getSize()<<std::endl;
1596                 }
1597
1598 #if 0
1599                 /*
1600                         Collect a list of all the objects known by the clients
1601                         and report it back to the environment.
1602                 */
1603
1604                 core::map<u16, bool> all_known_objects;
1605
1606                 for(core::map<u16, RemoteClient*>::Iterator
1607                         i = m_clients.getIterator();
1608                         i.atEnd() == false; i++)
1609                 {
1610                         RemoteClient *client = i.getNode()->getValue();
1611                         // Go through all known objects of client
1612                         for(core::map<u16, bool>::Iterator
1613                                         i = client->m_known_objects.getIterator();
1614                                         i.atEnd()==false; i++)
1615                         {
1616                                 u16 id = i.getNode()->getKey();
1617                                 all_known_objects[id] = true;
1618                         }
1619                 }
1620
1621                 m_env->setKnownActiveObjects(whatever);
1622 #endif
1623
1624         }
1625
1626         /*
1627                 Send object messages
1628         */
1629         {
1630                 JMutexAutoLock envlock(m_env_mutex);
1631                 JMutexAutoLock conlock(m_con_mutex);
1632
1633                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1634
1635                 // Key = object id
1636                 // Value = data sent by object
1637                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1638
1639                 // Get active object messages from environment
1640                 for(;;)
1641                 {
1642                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1643                         if(aom.id == 0)
1644                                 break;
1645
1646                         core::list<ActiveObjectMessage>* message_list = NULL;
1647                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1648                         n = buffered_messages.find(aom.id);
1649                         if(n == NULL)
1650                         {
1651                                 message_list = new core::list<ActiveObjectMessage>;
1652                                 buffered_messages.insert(aom.id, message_list);
1653                         }
1654                         else
1655                         {
1656                                 message_list = n->getValue();
1657                         }
1658                         message_list->push_back(aom);
1659                 }
1660
1661                 // Route data to every client
1662                 for(core::map<u16, RemoteClient*>::Iterator
1663                         i = m_clients.getIterator();
1664                         i.atEnd()==false; i++)
1665                 {
1666                         RemoteClient *client = i.getNode()->getValue();
1667                         std::string reliable_data;
1668                         std::string unreliable_data;
1669                         // Go through all objects in message buffer
1670                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1671                                         j = buffered_messages.getIterator();
1672                                         j.atEnd()==false; j++)
1673                         {
1674                                 // If object is not known by client, skip it
1675                                 u16 id = j.getNode()->getKey();
1676                                 if(client->m_known_objects.find(id) == NULL)
1677                                         continue;
1678                                 // Get message list of object
1679                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1680                                 // Go through every message
1681                                 for(core::list<ActiveObjectMessage>::Iterator
1682                                                 k = list->begin(); k != list->end(); k++)
1683                                 {
1684                                         // Compose the full new data with header
1685                                         ActiveObjectMessage aom = *k;
1686                                         std::string new_data;
1687                                         // Add object id
1688                                         char buf[2];
1689                                         writeU16((u8*)&buf[0], aom.id);
1690                                         new_data.append(buf, 2);
1691                                         // Add data
1692                                         new_data += serializeString(aom.datastring);
1693                                         // Add data to buffer
1694                                         if(aom.reliable)
1695                                                 reliable_data += new_data;
1696                                         else
1697                                                 unreliable_data += new_data;
1698                                 }
1699                         }
1700                         /*
1701                                 reliable_data and unreliable_data are now ready.
1702                                 Send them.
1703                         */
1704                         if(reliable_data.size() > 0)
1705                         {
1706                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1707                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1708                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1709                                                 reliable_data.size());
1710                                 // Send as reliable
1711                                 m_con.Send(client->peer_id, 0, reply, true);
1712                         }
1713                         if(unreliable_data.size() > 0)
1714                         {
1715                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1716                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1717                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1718                                                 unreliable_data.size());
1719                                 // Send as unreliable
1720                                 m_con.Send(client->peer_id, 0, reply, false);
1721                         }
1722
1723                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1724                         {
1725                                 infostream<<"Server: Size of object message data: "
1726                                                 <<"reliable: "<<reliable_data.size()
1727                                                 <<", unreliable: "<<unreliable_data.size()
1728                                                 <<std::endl;
1729                         }*/
1730                 }
1731
1732                 // Clear buffered_messages
1733                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1734                                 i = buffered_messages.getIterator();
1735                                 i.atEnd()==false; i++)
1736                 {
1737                         delete i.getNode()->getValue();
1738                 }
1739         }
1740
1741         } // enable_experimental
1742
1743         /*
1744                 Send queued-for-sending map edit events.
1745         */
1746         {
1747                 // We will be accessing the environment and the connection
1748                 JMutexAutoLock lock(m_env_mutex);
1749                 JMutexAutoLock conlock(m_con_mutex);
1750
1751                 // Don't send too many at a time
1752                 //u32 count = 0;
1753
1754                 // Single change sending is disabled if queue size is not small
1755                 bool disable_single_change_sending = false;
1756                 if(m_unsent_map_edit_queue.size() >= 4)
1757                         disable_single_change_sending = true;
1758
1759                 int event_count = m_unsent_map_edit_queue.size();
1760
1761                 // We'll log the amount of each
1762                 Profiler prof;
1763
1764                 while(m_unsent_map_edit_queue.size() != 0)
1765                 {
1766                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1767
1768                         // Players far away from the change are stored here.
1769                         // Instead of sending the changes, MapBlocks are set not sent
1770                         // for them.
1771                         core::list<u16> far_players;
1772
1773                         if(event->type == MEET_ADDNODE)
1774                         {
1775                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1776                                 prof.add("MEET_ADDNODE", 1);
1777                                 if(disable_single_change_sending)
1778                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1779                                                         &far_players, 5);
1780                                 else
1781                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1782                                                         &far_players, 30);
1783                         }
1784                         else if(event->type == MEET_REMOVENODE)
1785                         {
1786                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1787                                 prof.add("MEET_REMOVENODE", 1);
1788                                 if(disable_single_change_sending)
1789                                         sendRemoveNode(event->p, event->already_known_by_peer,
1790                                                         &far_players, 5);
1791                                 else
1792                                         sendRemoveNode(event->p, event->already_known_by_peer,
1793                                                         &far_players, 30);
1794                         }
1795                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1796                         {
1797                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1798                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1799                                 setBlockNotSent(event->p);
1800                         }
1801                         else if(event->type == MEET_OTHER)
1802                         {
1803                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1804                                 prof.add("MEET_OTHER", 1);
1805                                 for(core::map<v3s16, bool>::Iterator
1806                                                 i = event->modified_blocks.getIterator();
1807                                                 i.atEnd()==false; i++)
1808                                 {
1809                                         v3s16 p = i.getNode()->getKey();
1810                                         setBlockNotSent(p);
1811                                 }
1812                         }
1813                         else
1814                         {
1815                                 prof.add("unknown", 1);
1816                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1817                                                 <<((u32)event->type)<<std::endl;
1818                         }
1819
1820                         /*
1821                                 Set blocks not sent to far players
1822                         */
1823                         if(far_players.size() > 0)
1824                         {
1825                                 // Convert list format to that wanted by SetBlocksNotSent
1826                                 core::map<v3s16, MapBlock*> modified_blocks2;
1827                                 for(core::map<v3s16, bool>::Iterator
1828                                                 i = event->modified_blocks.getIterator();
1829                                                 i.atEnd()==false; i++)
1830                                 {
1831                                         v3s16 p = i.getNode()->getKey();
1832                                         modified_blocks2.insert(p,
1833                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1834                                 }
1835                                 // Set blocks not sent
1836                                 for(core::list<u16>::Iterator
1837                                                 i = far_players.begin();
1838                                                 i != far_players.end(); i++)
1839                                 {
1840                                         u16 peer_id = *i;
1841                                         RemoteClient *client = getClient(peer_id);
1842                                         if(client==NULL)
1843                                                 continue;
1844                                         client->SetBlocksNotSent(modified_blocks2);
1845                                 }
1846                         }
1847
1848                         delete event;
1849
1850                         /*// Don't send too many at a time
1851                         count++;
1852                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1853                                 break;*/
1854                 }
1855
1856                 if(event_count >= 5){
1857                         infostream<<"Server: MapEditEvents:"<<std::endl;
1858                         prof.print(infostream);
1859                 } else if(event_count != 0){
1860                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1861                         prof.print(verbosestream);
1862                 }
1863
1864         }
1865
1866         /*
1867                 Trigger emergethread (it somehow gets to a non-triggered but
1868                 bysy state sometimes)
1869         */
1870         {
1871                 float &counter = m_emergethread_trigger_timer;
1872                 counter += dtime;
1873                 if(counter >= 2.0)
1874                 {
1875                         counter = 0.0;
1876
1877                         m_emergethread.trigger();
1878
1879                         // Update m_enable_rollback_recording here too
1880                         m_enable_rollback_recording =
1881                                         g_settings->getBool("enable_rollback_recording");
1882                 }
1883         }
1884
1885         // Save map, players and auth stuff
1886         {
1887                 float &counter = m_savemap_timer;
1888                 counter += dtime;
1889                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1890                 {
1891                         counter = 0.0;
1892                         JMutexAutoLock lock(m_env_mutex);
1893
1894                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1895
1896                         //Ban stuff
1897                         if(m_banmanager.isModified())
1898                                 m_banmanager.save();
1899
1900                         // Save changed parts of map
1901                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1902
1903                         // Save players
1904                         m_env->serializePlayers(m_path_world);
1905
1906                         // Save environment metadata
1907                         m_env->saveMeta(m_path_world);
1908                 }
1909         }
1910 }
1911
1912 void Server::Receive()
1913 {
1914         DSTACK(__FUNCTION_NAME);
1915         SharedBuffer<u8> data;
1916         u16 peer_id;
1917         u32 datasize;
1918         try{
1919                 {
1920                         JMutexAutoLock conlock(m_con_mutex);
1921                         datasize = m_con.Receive(peer_id, data);
1922                 }
1923
1924                 // This has to be called so that the client list gets synced
1925                 // with the peer list of the connection
1926                 handlePeerChanges();
1927
1928                 ProcessData(*data, datasize, peer_id);
1929         }
1930         catch(con::InvalidIncomingDataException &e)
1931         {
1932                 infostream<<"Server::Receive(): "
1933                                 "InvalidIncomingDataException: what()="
1934                                 <<e.what()<<std::endl;
1935         }
1936         catch(con::PeerNotFoundException &e)
1937         {
1938                 //NOTE: This is not needed anymore
1939
1940                 // The peer has been disconnected.
1941                 // Find the associated player and remove it.
1942
1943                 /*JMutexAutoLock envlock(m_env_mutex);
1944
1945                 infostream<<"ServerThread: peer_id="<<peer_id
1946                                 <<" has apparently closed connection. "
1947                                 <<"Removing player."<<std::endl;
1948
1949                 m_env->removePlayer(peer_id);*/
1950         }
1951 }
1952
1953 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1954 {
1955         DSTACK(__FUNCTION_NAME);
1956         // Environment is locked first.
1957         JMutexAutoLock envlock(m_env_mutex);
1958         JMutexAutoLock conlock(m_con_mutex);
1959
1960         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1961
1962         try{
1963                 Address address = m_con.GetPeerAddress(peer_id);
1964                 std::string addr_s = address.serializeString();
1965
1966                 // drop player if is ip is banned
1967                 if(m_banmanager.isIpBanned(addr_s)){
1968                         infostream<<"Server: A banned client tried to connect from "
1969                                         <<addr_s<<"; banned name was "
1970                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1971                         // This actually doesn't seem to transfer to the client
1972                         SendAccessDenied(m_con, peer_id,
1973                                         L"Your ip is banned. Banned name was "
1974                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1975                         m_con.DeletePeer(peer_id);
1976                         return;
1977                 }
1978         }
1979         catch(con::PeerNotFoundException &e)
1980         {
1981                 infostream<<"Server::ProcessData(): Cancelling: peer "
1982                                 <<peer_id<<" not found"<<std::endl;
1983                 return;
1984         }
1985
1986         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1987
1988         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1989
1990         try
1991         {
1992
1993         if(datasize < 2)
1994                 return;
1995
1996         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
1997
1998         if(command == TOSERVER_INIT)
1999         {
2000                 // [0] u16 TOSERVER_INIT
2001                 // [2] u8 SER_FMT_VER_HIGHEST
2002                 // [3] u8[20] player_name
2003                 // [23] u8[28] password <--- can be sent without this, from old versions
2004
2005                 if(datasize < 2+1+PLAYERNAME_SIZE)
2006                         return;
2007
2008                 verbosestream<<"Server: Got TOSERVER_INIT from "
2009                                 <<peer_id<<std::endl;
2010
2011                 // First byte after command is maximum supported
2012                 // serialization version
2013                 u8 client_max = data[2];
2014                 u8 our_max = SER_FMT_VER_HIGHEST;
2015                 // Use the highest version supported by both
2016                 u8 deployed = core::min_(client_max, our_max);
2017                 // If it's lower than the lowest supported, give up.
2018                 if(deployed < SER_FMT_VER_LOWEST)
2019                         deployed = SER_FMT_VER_INVALID;
2020
2021                 //peer->serialization_version = deployed;
2022                 getClient(peer_id)->pending_serialization_version = deployed;
2023
2024                 if(deployed == SER_FMT_VER_INVALID)
2025                 {
2026                         actionstream<<"Server: A mismatched client tried to connect from "
2027                                         <<addr_s<<std::endl;
2028                         infostream<<"Server: Cannot negotiate "
2029                                         "serialization version with peer "
2030                                         <<peer_id<<std::endl;
2031                         SendAccessDenied(m_con, peer_id, std::wstring(
2032                                         L"Your client's version is not supported.\n"
2033                                         L"Server version is ")
2034                                         + narrow_to_wide(VERSION_STRING) + L"."
2035                         );
2036                         return;
2037                 }
2038
2039                 /*
2040                         Read and check network protocol version
2041                 */
2042
2043                 u16 min_net_proto_version = 0;
2044                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2045                         min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2046
2047                 // Use same version as minimum and maximum if maximum version field
2048                 // doesn't exist (backwards compatibility)
2049                 u16 max_net_proto_version = min_net_proto_version;
2050                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
2051                         max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
2052
2053                 // Start with client's maximum version
2054                 u16 net_proto_version = max_net_proto_version;
2055
2056                 // Figure out a working version if it is possible at all
2057                 if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
2058                                 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX)
2059                 {
2060                         // If maximum is larger than our maximum, go with our maximum
2061                         if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2062                                 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
2063                         // Else go with client's maximum
2064                         else
2065                                 net_proto_version = max_net_proto_version;
2066                 }
2067
2068                 verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
2069                                 <<min_net_proto_version<<", max: "<<max_net_proto_version
2070                                 <<", chosen: "<<net_proto_version<<std::endl;
2071
2072                 getClient(peer_id)->net_proto_version = net_proto_version;
2073
2074                 if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
2075                                 net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2076                 {
2077                         actionstream<<"Server: A mismatched client tried to connect from "<<addr_s
2078                                         <<std::endl;
2079                         SendAccessDenied(m_con, peer_id, std::wstring(
2080                                         L"Your client's version is not supported.\n"
2081                                         L"Server version is ")
2082                                         + narrow_to_wide(VERSION_STRING) + L",\n"
2083                                         + L"server's PROTOCOL_VERSION is "
2084                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
2085                                         + L"..."
2086                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
2087                                         + L", client's PROTOCOL_VERSION is "
2088                                         + narrow_to_wide(itos(min_net_proto_version))
2089                                         + L"..."
2090                                         + narrow_to_wide(itos(max_net_proto_version))
2091                         );
2092                         return;
2093                 }
2094
2095                 if(g_settings->getBool("strict_protocol_version_checking"))
2096                 {
2097                         if(net_proto_version != LATEST_PROTOCOL_VERSION)
2098                         {
2099                                 actionstream<<"Server: A mismatched (strict) client tried to "
2100                                                 <<"connect from "<<addr_s<<std::endl;
2101                                 SendAccessDenied(m_con, peer_id, std::wstring(
2102                                                 L"Your client's version is not supported.\n"
2103                                                 L"Server version is ")
2104                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2105                                                 + L"server's PROTOCOL_VERSION (strict) is "
2106                                                 + narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
2107                                                 + L", client's PROTOCOL_VERSION is "
2108                                                 + narrow_to_wide(itos(min_net_proto_version))
2109                                                 + L"..."
2110                                                 + narrow_to_wide(itos(max_net_proto_version))
2111                                 );
2112                                 return;
2113                         }
2114                 }
2115
2116                 /*
2117                         Set up player
2118                 */
2119
2120                 // Get player name
2121                 char playername[PLAYERNAME_SIZE];
2122                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2123                 {
2124                         playername[i] = data[3+i];
2125                 }
2126                 playername[PLAYERNAME_SIZE-1] = 0;
2127
2128                 if(playername[0]=='\0')
2129                 {
2130                         actionstream<<"Server: Player with an empty name "
2131                                         <<"tried to connect from "<<addr_s<<std::endl;
2132                         SendAccessDenied(m_con, peer_id,
2133                                         L"Empty name");
2134                         return;
2135                 }
2136
2137                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2138                 {
2139                         actionstream<<"Server: Player with an invalid name "
2140                                         <<"tried to connect from "<<addr_s<<std::endl;
2141                         SendAccessDenied(m_con, peer_id,
2142                                         L"Name contains unallowed characters");
2143                         return;
2144                 }
2145
2146                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2147                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2148
2149                 // Get password
2150                 char given_password[PASSWORD_SIZE];
2151                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2152                 {
2153                         // old version - assume blank password
2154                         given_password[0] = 0;
2155                 }
2156                 else
2157                 {
2158                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2159                         {
2160                                 given_password[i] = data[23+i];
2161                         }
2162                         given_password[PASSWORD_SIZE-1] = 0;
2163                 }
2164
2165                 if(!base64_is_valid(given_password)){
2166                         infostream<<"Server: "<<playername
2167                                         <<" supplied invalid password hash"<<std::endl;
2168                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2169                         return;
2170                 }
2171
2172                 std::string checkpwd; // Password hash to check against
2173                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2174
2175                 // If no authentication info exists for user, create it
2176                 if(!has_auth){
2177                         if(!isSingleplayer() &&
2178                                         g_settings->getBool("disallow_empty_password") &&
2179                                         std::string(given_password) == ""){
2180                                 SendAccessDenied(m_con, peer_id, L"Empty passwords are "
2181                                                 L"disallowed. Set a password and try again.");
2182                                 return;
2183                         }
2184                         std::wstring raw_default_password =
2185                                 narrow_to_wide(g_settings->get("default_password"));
2186                         std::string initial_password =
2187                                 translatePassword(playername, raw_default_password);
2188
2189                         // If default_password is empty, allow any initial password
2190                         if (raw_default_password.length() == 0)
2191                                 initial_password = given_password;
2192
2193                         scriptapi_create_auth(m_lua, playername, initial_password);
2194                 }
2195
2196                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2197
2198                 if(!has_auth){
2199                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2200                         return;
2201                 }
2202
2203                 if(given_password != checkpwd){
2204                         infostream<<"Server: peer_id="<<peer_id
2205                                         <<": supplied invalid password for "
2206                                         <<playername<<std::endl;
2207                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2208                         return;
2209                 }
2210
2211                 // Do not allow multiple players in simple singleplayer mode.
2212                 // This isn't a perfect way to do it, but will suffice for now.
2213                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2214                         infostream<<"Server: Not allowing another client to connect in"
2215                                         <<" simple singleplayer mode"<<std::endl;
2216                         SendAccessDenied(m_con, peer_id,
2217                                         L"Running in simple singleplayer mode.");
2218                         return;
2219                 }
2220
2221                 // Enforce user limit.
2222                 // Don't enforce for users that have some admin right
2223                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2224                                 !checkPriv(playername, "server") &&
2225                                 !checkPriv(playername, "ban") &&
2226                                 !checkPriv(playername, "privs") &&
2227                                 !checkPriv(playername, "password") &&
2228                                 playername != g_settings->get("name"))
2229                 {
2230                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2231                                         <<" are already max_users="
2232                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2233                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2234                         return;
2235                 }
2236
2237                 // Get player
2238                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2239
2240                 // If failed, cancel
2241                 if(playersao == NULL)
2242                 {
2243                         errorstream<<"Server: peer_id="<<peer_id
2244                                         <<": failed to emerge player"<<std::endl;
2245                         return;
2246                 }
2247
2248                 /*
2249                         Answer with a TOCLIENT_INIT
2250                 */
2251                 {
2252                         SharedBuffer<u8> reply(2+1+6+8+4);
2253                         writeU16(&reply[0], TOCLIENT_INIT);
2254                         writeU8(&reply[2], deployed);
2255                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2256                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2257                         writeF1000(&reply[2+1+6+8], g_settings->getFloat("dedicated_server_step"));
2258
2259                         // Send as reliable
2260                         m_con.Send(peer_id, 0, reply, true);
2261                 }
2262
2263                 /*
2264                         Send complete position information
2265                 */
2266                 SendMovePlayer(peer_id);
2267
2268                 return;
2269         }
2270
2271         if(command == TOSERVER_INIT2)
2272         {
2273                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2274                                 <<peer_id<<std::endl;
2275
2276                 Player *player = m_env->getPlayer(peer_id);
2277                 if(!player){
2278                         verbosestream<<"Server: TOSERVER_INIT2: "
2279                                         <<"Player not found; ignoring."<<std::endl;
2280                         return;
2281                 }
2282
2283                 RemoteClient *client = getClient(peer_id);
2284                 client->serialization_version =
2285                                 getClient(peer_id)->pending_serialization_version;
2286
2287                 /*
2288                         Send some initialization data
2289                 */
2290
2291                 infostream<<"Server: Sending content to "
2292                                 <<getPlayerName(peer_id)<<std::endl;
2293
2294                 // Send item definitions
2295                 SendItemDef(m_con, peer_id, m_itemdef);
2296
2297                 // Send node definitions
2298                 SendNodeDef(m_con, peer_id, m_nodedef, client->net_proto_version);
2299
2300                 // Send media announcement
2301                 sendMediaAnnouncement(peer_id);
2302
2303                 // Send privileges
2304                 SendPlayerPrivileges(peer_id);
2305
2306                 // Send inventory formspec
2307                 SendPlayerInventoryFormspec(peer_id);
2308
2309                 // Send inventory
2310                 UpdateCrafting(peer_id);
2311                 SendInventory(peer_id);
2312
2313                 // Send HP
2314                 SendPlayerHP(peer_id);
2315
2316                 // Send detached inventories
2317                 sendDetachedInventories(peer_id);
2318
2319                 // Show death screen if necessary
2320                 if(player->hp == 0)
2321                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2322
2323                 // Send time of day
2324                 {
2325                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2326                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2327                         m_con.Send(peer_id, 0, data, true);
2328                 }
2329
2330                 // Note things in chat if not in simple singleplayer mode
2331                 if(!m_simple_singleplayer_mode)
2332                 {
2333                         // Send information about server to player in chat
2334                         SendChatMessage(peer_id, getStatusString());
2335
2336                         // Send information about joining in chat
2337                         {
2338                                 std::wstring name = L"unknown";
2339                                 Player *player = m_env->getPlayer(peer_id);
2340                                 if(player != NULL)
2341                                         name = narrow_to_wide(player->getName());
2342
2343                                 std::wstring message;
2344                                 message += L"*** ";
2345                                 message += name;
2346                                 message += L" joined the game.";
2347                                 BroadcastChatMessage(message);
2348                         }
2349                 }
2350
2351                 // Warnings about protocol version can be issued here
2352                 if(getClient(peer_id)->net_proto_version < LATEST_PROTOCOL_VERSION)
2353                 {
2354                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT'S "
2355                                         L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
2356                 }
2357
2358                 /*
2359                         Print out action
2360                 */
2361                 {
2362                         std::ostringstream os(std::ios_base::binary);
2363                         for(core::map<u16, RemoteClient*>::Iterator
2364                                 i = m_clients.getIterator();
2365                                 i.atEnd() == false; i++)
2366                         {
2367                                 RemoteClient *client = i.getNode()->getValue();
2368                                 assert(client->peer_id == i.getNode()->getKey());
2369                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2370                                         continue;
2371                                 // Get player
2372                                 Player *player = m_env->getPlayer(client->peer_id);
2373                                 if(!player)
2374                                         continue;
2375                                 // Get name of player
2376                                 os<<player->getName()<<" ";
2377                         }
2378
2379                         actionstream<<player->getName()<<" joins game. List of players: "
2380                                         <<os.str()<<std::endl;
2381                 }
2382
2383                 return;
2384         }
2385
2386         if(peer_ser_ver == SER_FMT_VER_INVALID)
2387         {
2388                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2389                                 " serialization format invalid or not initialized."
2390                                 " Skipping incoming command="<<command<<std::endl;
2391                 return;
2392         }
2393
2394         Player *player = m_env->getPlayer(peer_id);
2395         if(player == NULL){
2396                 infostream<<"Server::ProcessData(): Cancelling: "
2397                                 "No player for peer_id="<<peer_id
2398                                 <<std::endl;
2399                 return;
2400         }
2401
2402         PlayerSAO *playersao = player->getPlayerSAO();
2403         if(playersao == NULL){
2404                 infostream<<"Server::ProcessData(): Cancelling: "
2405                                 "No player object for peer_id="<<peer_id
2406                                 <<std::endl;
2407                 return;
2408         }
2409
2410         if(command == TOSERVER_PLAYERPOS)
2411         {
2412                 if(datasize < 2+12+12+4+4)
2413                         return;
2414
2415                 u32 start = 0;
2416                 v3s32 ps = readV3S32(&data[start+2]);
2417                 v3s32 ss = readV3S32(&data[start+2+12]);
2418                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2419                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2420                 u32 keyPressed = 0;
2421                 if(datasize >= 2+12+12+4+4+4)
2422                         keyPressed = (u32)readU32(&data[2+12+12+4+4]);
2423                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2424                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2425                 pitch = wrapDegrees(pitch);
2426                 yaw = wrapDegrees(yaw);
2427
2428                 player->setPosition(position);
2429                 player->setSpeed(speed);
2430                 player->setPitch(pitch);
2431                 player->setYaw(yaw);
2432                 player->keyPressed=keyPressed;
2433                 player->control.up = (bool)(keyPressed&1);
2434                 player->control.down = (bool)(keyPressed&2);
2435                 player->control.left = (bool)(keyPressed&4);
2436                 player->control.right = (bool)(keyPressed&8);
2437                 player->control.jump = (bool)(keyPressed&16);
2438                 player->control.aux1 = (bool)(keyPressed&32);
2439                 player->control.sneak = (bool)(keyPressed&64);
2440                 player->control.LMB = (bool)(keyPressed&128);
2441                 player->control.RMB = (bool)(keyPressed&256);
2442
2443                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2444                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2445                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2446         }
2447         else if(command == TOSERVER_GOTBLOCKS)
2448         {
2449                 if(datasize < 2+1)
2450                         return;
2451
2452                 /*
2453                         [0] u16 command
2454                         [2] u8 count
2455                         [3] v3s16 pos_0
2456                         [3+6] v3s16 pos_1
2457                         ...
2458                 */
2459
2460                 u16 count = data[2];
2461                 for(u16 i=0; i<count; i++)
2462                 {
2463                         if((s16)datasize < 2+1+(i+1)*6)
2464                                 throw con::InvalidIncomingDataException
2465                                         ("GOTBLOCKS length is too short");
2466                         v3s16 p = readV3S16(&data[2+1+i*6]);
2467                         /*infostream<<"Server: GOTBLOCKS ("
2468                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2469                         RemoteClient *client = getClient(peer_id);
2470                         client->GotBlock(p);
2471                 }
2472         }
2473         else if(command == TOSERVER_DELETEDBLOCKS)
2474         {
2475                 if(datasize < 2+1)
2476                         return;
2477
2478                 /*
2479                         [0] u16 command
2480                         [2] u8 count
2481                         [3] v3s16 pos_0
2482                         [3+6] v3s16 pos_1
2483                         ...
2484                 */
2485
2486                 u16 count = data[2];
2487                 for(u16 i=0; i<count; i++)
2488                 {
2489                         if((s16)datasize < 2+1+(i+1)*6)
2490                                 throw con::InvalidIncomingDataException
2491                                         ("DELETEDBLOCKS length is too short");
2492                         v3s16 p = readV3S16(&data[2+1+i*6]);
2493                         /*infostream<<"Server: DELETEDBLOCKS ("
2494                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2495                         RemoteClient *client = getClient(peer_id);
2496                         client->SetBlockNotSent(p);
2497                 }
2498         }
2499         else if(command == TOSERVER_CLICK_OBJECT)
2500         {
2501                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2502                 return;
2503         }
2504         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2505         {
2506                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2507                 return;
2508         }
2509         else if(command == TOSERVER_GROUND_ACTION)
2510         {
2511                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2512                 return;
2513
2514         }
2515         else if(command == TOSERVER_RELEASE)
2516         {
2517                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2518                 return;
2519         }
2520         else if(command == TOSERVER_SIGNTEXT)
2521         {
2522                 infostream<<"Server: SIGNTEXT not supported anymore"
2523                                 <<std::endl;
2524                 return;
2525         }
2526         else if(command == TOSERVER_SIGNNODETEXT)
2527         {
2528                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2529                                 <<std::endl;
2530                 return;
2531         }
2532         else if(command == TOSERVER_INVENTORY_ACTION)
2533         {
2534                 // Strip command and create a stream
2535                 std::string datastring((char*)&data[2], datasize-2);
2536                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2537                 std::istringstream is(datastring, std::ios_base::binary);
2538                 // Create an action
2539                 InventoryAction *a = InventoryAction::deSerialize(is);
2540                 if(a == NULL)
2541                 {
2542                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2543                                         <<"InventoryAction::deSerialize() returned NULL"
2544                                         <<std::endl;
2545                         return;
2546                 }
2547
2548                 // If something goes wrong, this player is to blame
2549                 RollbackScopeActor rollback_scope(m_rollback,
2550                                 std::string("player:")+player->getName());
2551
2552                 /*
2553                         Note: Always set inventory not sent, to repair cases
2554                         where the client made a bad prediction.
2555                 */
2556
2557                 /*
2558                         Handle restrictions and special cases of the move action
2559                 */
2560                 if(a->getType() == IACTION_MOVE)
2561                 {
2562                         IMoveAction *ma = (IMoveAction*)a;
2563
2564                         ma->from_inv.applyCurrentPlayer(player->getName());
2565                         ma->to_inv.applyCurrentPlayer(player->getName());
2566
2567                         setInventoryModified(ma->from_inv);
2568                         setInventoryModified(ma->to_inv);
2569
2570                         bool from_inv_is_current_player =
2571                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2572                                 (ma->from_inv.name == player->getName());
2573
2574                         bool to_inv_is_current_player =
2575                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2576                                 (ma->to_inv.name == player->getName());
2577
2578                         /*
2579                                 Disable moving items out of craftpreview
2580                         */
2581                         if(ma->from_list == "craftpreview")
2582                         {
2583                                 infostream<<"Ignoring IMoveAction from "
2584                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2585                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2586                                                 <<" because src is "<<ma->from_list<<std::endl;
2587                                 delete a;
2588                                 return;
2589                         }
2590
2591                         /*
2592                                 Disable moving items into craftresult and craftpreview
2593                         */
2594                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2595                         {
2596                                 infostream<<"Ignoring IMoveAction from "
2597                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2598                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2599                                                 <<" because dst is "<<ma->to_list<<std::endl;
2600                                 delete a;
2601                                 return;
2602                         }
2603
2604                         // Disallow moving items in elsewhere than player's inventory
2605                         // if not allowed to interact
2606                         if(!checkPriv(player->getName(), "interact") &&
2607                                         (!from_inv_is_current_player ||
2608                                         !to_inv_is_current_player))
2609                         {
2610                                 infostream<<"Cannot move outside of player's inventory: "
2611                                                 <<"No interact privilege"<<std::endl;
2612                                 delete a;
2613                                 return;
2614                         }
2615                 }
2616                 /*
2617                         Handle restrictions and special cases of the drop action
2618                 */
2619                 else if(a->getType() == IACTION_DROP)
2620                 {
2621                         IDropAction *da = (IDropAction*)a;
2622
2623                         da->from_inv.applyCurrentPlayer(player->getName());
2624
2625                         setInventoryModified(da->from_inv);
2626
2627                         // Disallow dropping items if not allowed to interact
2628                         if(!checkPriv(player->getName(), "interact"))
2629                         {
2630                                 delete a;
2631                                 return;
2632                         }
2633                 }
2634                 /*
2635                         Handle restrictions and special cases of the craft action
2636                 */
2637                 else if(a->getType() == IACTION_CRAFT)
2638                 {
2639                         ICraftAction *ca = (ICraftAction*)a;
2640
2641                         ca->craft_inv.applyCurrentPlayer(player->getName());
2642
2643                         setInventoryModified(ca->craft_inv);
2644
2645                         //bool craft_inv_is_current_player =
2646                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2647                         //      (ca->craft_inv.name == player->getName());
2648
2649                         // Disallow crafting if not allowed to interact
2650                         if(!checkPriv(player->getName(), "interact"))
2651                         {
2652                                 infostream<<"Cannot craft: "
2653                                                 <<"No interact privilege"<<std::endl;
2654                                 delete a;
2655                                 return;
2656                         }
2657                 }
2658
2659                 // Do the action
2660                 a->apply(this, playersao, this);
2661                 // Eat the action
2662                 delete a;
2663         }
2664         else if(command == TOSERVER_CHAT_MESSAGE)
2665         {
2666                 /*
2667                         u16 command
2668                         u16 length
2669                         wstring message
2670                 */
2671                 u8 buf[6];
2672                 std::string datastring((char*)&data[2], datasize-2);
2673                 std::istringstream is(datastring, std::ios_base::binary);
2674
2675                 // Read stuff
2676                 is.read((char*)buf, 2);
2677                 u16 len = readU16(buf);
2678
2679                 std::wstring message;
2680                 for(u16 i=0; i<len; i++)
2681                 {
2682                         is.read((char*)buf, 2);
2683                         message += (wchar_t)readU16(buf);
2684                 }
2685
2686                 // If something goes wrong, this player is to blame
2687                 RollbackScopeActor rollback_scope(m_rollback,
2688                                 std::string("player:")+player->getName());
2689
2690                 // Get player name of this client
2691                 std::wstring name = narrow_to_wide(player->getName());
2692
2693                 // Run script hook
2694                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2695                                 wide_to_narrow(message));
2696                 // If script ate the message, don't proceed
2697                 if(ate)
2698                         return;
2699
2700                 // Line to send to players
2701                 std::wstring line;
2702                 // Whether to send to the player that sent the line
2703                 bool send_to_sender = false;
2704                 // Whether to send to other players
2705                 bool send_to_others = false;
2706
2707                 // Commands are implemented in Lua, so only catch invalid
2708                 // commands that were not "eaten" and send an error back
2709                 if(message[0] == L'/')
2710                 {
2711                         message = message.substr(1);
2712                         send_to_sender = true;
2713                         if(message.length() == 0)
2714                                 line += L"-!- Empty command";
2715                         else
2716                                 line += L"-!- Invalid command: " + str_split(message, L' ')[0];
2717                 }
2718                 else
2719                 {
2720                         if(checkPriv(player->getName(), "shout")){
2721                                 line += L"<";
2722                                 line += name;
2723                                 line += L"> ";
2724                                 line += message;
2725                                 send_to_others = true;
2726                         } else {
2727                                 line += L"-!- You don't have permission to shout.";
2728                                 send_to_sender = true;
2729                         }
2730                 }
2731
2732                 if(line != L"")
2733                 {
2734                         if(send_to_others)
2735                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2736
2737                         /*
2738                                 Send the message to clients
2739                         */
2740                         for(core::map<u16, RemoteClient*>::Iterator
2741                                 i = m_clients.getIterator();
2742                                 i.atEnd() == false; i++)
2743                         {
2744                                 // Get client and check that it is valid
2745                                 RemoteClient *client = i.getNode()->getValue();
2746                                 assert(client->peer_id == i.getNode()->getKey());
2747                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2748                                         continue;
2749
2750                                 // Filter recipient
2751                                 bool sender_selected = (peer_id == client->peer_id);
2752                                 if(sender_selected == true && send_to_sender == false)
2753                                         continue;
2754                                 if(sender_selected == false && send_to_others == false)
2755                                         continue;
2756
2757                                 SendChatMessage(client->peer_id, line);
2758                         }
2759                 }
2760         }
2761         else if(command == TOSERVER_DAMAGE)
2762         {
2763                 std::string datastring((char*)&data[2], datasize-2);
2764                 std::istringstream is(datastring, std::ios_base::binary);
2765                 u8 damage = readU8(is);
2766
2767                 actionstream<<player->getName()<<" damaged by "
2768                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2769                                 <<std::endl;
2770
2771                 playersao->setHP(playersao->getHP() - damage);
2772
2773                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2774                         DiePlayer(peer_id);
2775
2776                 if(playersao->m_hp_not_sent)
2777                         SendPlayerHP(peer_id);
2778         }
2779         else if(command == TOSERVER_PASSWORD)
2780         {
2781                 /*
2782                         [0] u16 TOSERVER_PASSWORD
2783                         [2] u8[28] old password
2784                         [30] u8[28] new password
2785                 */
2786
2787                 if(datasize != 2+PASSWORD_SIZE*2)
2788                         return;
2789                 /*char password[PASSWORD_SIZE];
2790                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2791                         password[i] = data[2+i];
2792                 password[PASSWORD_SIZE-1] = 0;*/
2793                 std::string oldpwd;
2794                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2795                 {
2796                         char c = data[2+i];
2797                         if(c == 0)
2798                                 break;
2799                         oldpwd += c;
2800                 }
2801                 std::string newpwd;
2802                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2803                 {
2804                         char c = data[2+PASSWORD_SIZE+i];
2805                         if(c == 0)
2806                                 break;
2807                         newpwd += c;
2808                 }
2809
2810                 if(!base64_is_valid(newpwd)){
2811                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2812                         // Wrong old password supplied!!
2813                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2814                         return;
2815                 }
2816
2817                 infostream<<"Server: Client requests a password change from "
2818                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2819
2820                 std::string playername = player->getName();
2821
2822                 std::string checkpwd;
2823                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2824
2825                 if(oldpwd != checkpwd)
2826                 {
2827                         infostream<<"Server: invalid old password"<<std::endl;
2828                         // Wrong old password supplied!!
2829                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2830                         return;
2831                 }
2832
2833                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2834                 if(success){
2835                         actionstream<<player->getName()<<" changes password"<<std::endl;
2836                         SendChatMessage(peer_id, L"Password change successful.");
2837                 } else {
2838                         actionstream<<player->getName()<<" tries to change password but "
2839                                         <<"it fails"<<std::endl;
2840                         SendChatMessage(peer_id, L"Password change failed or inavailable.");
2841                 }
2842         }
2843         else if(command == TOSERVER_PLAYERITEM)
2844         {
2845                 if (datasize < 2+2)
2846                         return;
2847
2848                 u16 item = readU16(&data[2]);
2849                 playersao->setWieldIndex(item);
2850         }
2851         else if(command == TOSERVER_RESPAWN)
2852         {
2853                 if(player->hp != 0)
2854                         return;
2855
2856                 RespawnPlayer(peer_id);
2857
2858                 actionstream<<player->getName()<<" respawns at "
2859                                 <<PP(player->getPosition()/BS)<<std::endl;
2860
2861                 // ActiveObject is added to environment in AsyncRunStep after
2862                 // the previous addition has been succesfully removed
2863         }
2864         else if(command == TOSERVER_REQUEST_MEDIA) {
2865                 std::string datastring((char*)&data[2], datasize-2);
2866                 std::istringstream is(datastring, std::ios_base::binary);
2867
2868                 core::list<MediaRequest> tosend;
2869                 u16 numfiles = readU16(is);
2870
2871                 infostream<<"Sending "<<numfiles<<" files to "
2872                                 <<getPlayerName(peer_id)<<std::endl;
2873                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2874
2875                 for(int i = 0; i < numfiles; i++) {
2876                         std::string name = deSerializeString(is);
2877                         tosend.push_back(MediaRequest(name));
2878                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2879                                         <<name<<std::endl;
2880                 }
2881
2882                 sendRequestedMedia(peer_id, tosend);
2883
2884                 // Now the client should know about everything
2885                 // (definitions and files)
2886                 getClient(peer_id)->definitions_sent = true;
2887         }
2888         else if(command == TOSERVER_RECEIVED_MEDIA) {
2889                 getClient(peer_id)->definitions_sent = true;
2890         }
2891         else if(command == TOSERVER_INTERACT)
2892         {
2893                 std::string datastring((char*)&data[2], datasize-2);
2894                 std::istringstream is(datastring, std::ios_base::binary);
2895
2896                 /*
2897                         [0] u16 command
2898                         [2] u8 action
2899                         [3] u16 item
2900                         [5] u32 length of the next item
2901                         [9] serialized PointedThing
2902                         actions:
2903                         0: start digging (from undersurface) or use
2904                         1: stop digging (all parameters ignored)
2905                         2: digging completed
2906                         3: place block or item (to abovesurface)
2907                         4: use item
2908                 */
2909                 u8 action = readU8(is);
2910                 u16 item_i = readU16(is);
2911                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2912                 PointedThing pointed;
2913                 pointed.deSerialize(tmp_is);
2914
2915                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2916                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2917
2918                 if(player->hp == 0)
2919                 {
2920                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2921                                 <<" tried to interact, but is dead!"<<std::endl;
2922                         return;
2923                 }
2924
2925                 v3f player_pos = playersao->getLastGoodPosition();
2926
2927                 // Update wielded item
2928                 playersao->setWieldIndex(item_i);
2929
2930                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2931                 v3s16 p_under = pointed.node_undersurface;
2932                 v3s16 p_above = pointed.node_abovesurface;
2933
2934                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2935                 ServerActiveObject *pointed_object = NULL;
2936                 if(pointed.type == POINTEDTHING_OBJECT)
2937                 {
2938                         pointed_object = m_env->getActiveObject(pointed.object_id);
2939                         if(pointed_object == NULL)
2940                         {
2941                                 verbosestream<<"TOSERVER_INTERACT: "
2942                                         "pointed object is NULL"<<std::endl;
2943                                 return;
2944                         }
2945
2946                 }
2947
2948                 v3f pointed_pos_under = player_pos;
2949                 v3f pointed_pos_above = player_pos;
2950                 if(pointed.type == POINTEDTHING_NODE)
2951                 {
2952                         pointed_pos_under = intToFloat(p_under, BS);
2953                         pointed_pos_above = intToFloat(p_above, BS);
2954                 }
2955                 else if(pointed.type == POINTEDTHING_OBJECT)
2956                 {
2957                         pointed_pos_under = pointed_object->getBasePosition();
2958                         pointed_pos_above = pointed_pos_under;
2959                 }
2960
2961                 /*
2962                         Check that target is reasonably close
2963                         (only when digging or placing things)
2964                 */
2965                 if(action == 0 || action == 2 || action == 3)
2966                 {
2967                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2968                         float max_d = BS * 14; // Just some large enough value
2969                         if(d > max_d){
2970                                 actionstream<<"Player "<<player->getName()
2971                                                 <<" tried to access "<<pointed.dump()
2972                                                 <<" from too far: "
2973                                                 <<"d="<<d<<", max_d="<<max_d
2974                                                 <<". ignoring."<<std::endl;
2975                                 // Re-send block to revert change on client-side
2976                                 RemoteClient *client = getClient(peer_id);
2977                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2978                                 client->SetBlockNotSent(blockpos);
2979                                 // Do nothing else
2980                                 return;
2981                         }
2982                 }
2983
2984                 /*
2985                         Make sure the player is allowed to do it
2986                 */
2987                 if(!checkPriv(player->getName(), "interact"))
2988                 {
2989                         actionstream<<player->getName()<<" attempted to interact with "
2990                                         <<pointed.dump()<<" without 'interact' privilege"
2991                                         <<std::endl;
2992                         // Re-send block to revert change on client-side
2993                         RemoteClient *client = getClient(peer_id);
2994                         // Digging completed -> under
2995                         if(action == 2){
2996                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2997                                 client->SetBlockNotSent(blockpos);
2998                         }
2999                         // Placement -> above
3000                         if(action == 3){
3001                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3002                                 client->SetBlockNotSent(blockpos);
3003                         }
3004                         return;
3005                 }
3006
3007                 /*
3008                         If something goes wrong, this player is to blame
3009                 */
3010                 RollbackScopeActor rollback_scope(m_rollback,
3011                                 std::string("player:")+player->getName());
3012
3013                 /*
3014                         0: start digging or punch object
3015                 */
3016                 if(action == 0)
3017                 {
3018                         if(pointed.type == POINTEDTHING_NODE)
3019                         {
3020                                 /*
3021                                         NOTE: This can be used in the future to check if
3022                                         somebody is cheating, by checking the timing.
3023                                 */
3024                                 MapNode n(CONTENT_IGNORE);
3025                                 try
3026                                 {
3027                                         n = m_env->getMap().getNode(p_under);
3028                                 }
3029                                 catch(InvalidPositionException &e)
3030                                 {
3031                                         infostream<<"Server: Not punching: Node not found."
3032                                                         <<" Adding block to emerge queue."
3033                                                         <<std::endl;
3034                                         m_emerge_queue.addBlock(peer_id,
3035                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3036                                 }
3037                                 if(n.getContent() != CONTENT_IGNORE)
3038                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
3039                                 // Cheat prevention
3040                                 playersao->noCheatDigStart(p_under);
3041                         }
3042                         else if(pointed.type == POINTEDTHING_OBJECT)
3043                         {
3044                                 // Skip if object has been removed
3045                                 if(pointed_object->m_removed)
3046                                         return;
3047
3048                                 actionstream<<player->getName()<<" punches object "
3049                                                 <<pointed.object_id<<": "
3050                                                 <<pointed_object->getDescription()<<std::endl;
3051
3052                                 ItemStack punchitem = playersao->getWieldedItem();
3053                                 ToolCapabilities toolcap =
3054                                                 punchitem.getToolCapabilities(m_itemdef);
3055                                 v3f dir = (pointed_object->getBasePosition() -
3056                                                 (player->getPosition() + player->getEyeOffset())
3057                                                         ).normalize();
3058                                 float time_from_last_punch =
3059                                         playersao->resetTimeFromLastPunch();
3060                                 pointed_object->punch(dir, &toolcap, playersao,
3061                                                 time_from_last_punch);
3062                         }
3063
3064                 } // action == 0
3065
3066                 /*
3067                         1: stop digging
3068                 */
3069                 else if(action == 1)
3070                 {
3071                 } // action == 1
3072
3073                 /*
3074                         2: Digging completed
3075                 */
3076                 else if(action == 2)
3077                 {
3078                         // Only digging of nodes
3079                         if(pointed.type == POINTEDTHING_NODE)
3080                         {
3081                                 MapNode n(CONTENT_IGNORE);
3082                                 try
3083                                 {
3084                                         n = m_env->getMap().getNode(p_under);
3085                                 }
3086                                 catch(InvalidPositionException &e)
3087                                 {
3088                                         infostream<<"Server: Not finishing digging: Node not found."
3089                                                         <<" Adding block to emerge queue."
3090                                                         <<std::endl;
3091                                         m_emerge_queue.addBlock(peer_id,
3092                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3093                                 }
3094
3095                                 /* Cheat prevention */
3096                                 bool is_valid_dig = true;
3097                                 if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
3098                                 {
3099                                         v3s16 nocheat_p = playersao->getNoCheatDigPos();
3100                                         float nocheat_t = playersao->getNoCheatDigTime();
3101                                         playersao->noCheatDigEnd();
3102                                         // If player didn't start digging this, ignore dig
3103                                         if(nocheat_p != p_under){
3104                                                 infostream<<"Server: NoCheat: "<<player->getName()
3105                                                                 <<" started digging "
3106                                                                 <<PP(nocheat_p)<<" and completed digging "
3107                                                                 <<PP(p_under)<<"; not digging."<<std::endl;
3108                                                 is_valid_dig = false;
3109                                         }
3110                                         // Get player's wielded item
3111                                         ItemStack playeritem;
3112                                         InventoryList *mlist = playersao->getInventory()->getList("main");
3113                                         if(mlist != NULL)
3114                                                 playeritem = mlist->getItem(playersao->getWieldIndex());
3115                                         ToolCapabilities playeritem_toolcap =
3116                                                         playeritem.getToolCapabilities(m_itemdef);
3117                                         // Get diggability and expected digging time
3118                                         DigParams params = getDigParams(m_nodedef->get(n).groups,
3119                                                         &playeritem_toolcap);
3120                                         // If can't dig, try hand
3121                                         if(!params.diggable){
3122                                                 const ItemDefinition &hand = m_itemdef->get("");
3123                                                 const ToolCapabilities *tp = hand.tool_capabilities;
3124                                                 if(tp)
3125                                                         params = getDigParams(m_nodedef->get(n).groups, tp);
3126                                         }
3127                                         // If can't dig, ignore dig
3128                                         if(!params.diggable){
3129                                                 infostream<<"Server: NoCheat: "<<player->getName()
3130                                                                 <<" completed digging "<<PP(p_under)
3131                                                                 <<", which is not diggable with tool. not digging."
3132                                                                 <<std::endl;
3133                                                 is_valid_dig = false;
3134                                         }
3135                                         // If time is considerably too short, ignore dig
3136                                         // Check time only for medium and slow timed digs
3137                                         if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
3138                                                 infostream<<"Server: NoCheat: "<<player->getName()
3139                                                                 <<" completed digging "
3140                                                                 <<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
3141                                                                 <<params.time<<"s; not digging."<<std::endl;
3142                                                 is_valid_dig = false;
3143                                         }
3144                                 }
3145
3146                                 /* Actually dig node */
3147
3148                                 if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
3149                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3150
3151                                 // Send unusual result (that is, node not being removed)
3152                                 if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3153                                 {
3154                                         // Re-send block to revert change on client-side
3155                                         RemoteClient *client = getClient(peer_id);
3156                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3157                                         client->SetBlockNotSent(blockpos);
3158                                 }
3159                         }
3160                 } // action == 2
3161
3162                 /*
3163                         3: place block or right-click object
3164                 */
3165                 else if(action == 3)
3166                 {
3167                         ItemStack item = playersao->getWieldedItem();
3168
3169                         // Reset build time counter
3170                         if(pointed.type == POINTEDTHING_NODE &&
3171                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3172                                 getClient(peer_id)->m_time_from_building = 0.0;
3173
3174                         if(pointed.type == POINTEDTHING_OBJECT)
3175                         {
3176                                 // Right click object
3177
3178                                 // Skip if object has been removed
3179                                 if(pointed_object->m_removed)
3180                                         return;
3181
3182                                 actionstream<<player->getName()<<" right-clicks object "
3183                                                 <<pointed.object_id<<": "
3184                                                 <<pointed_object->getDescription()<<std::endl;
3185
3186                                 // Do stuff
3187                                 pointed_object->rightClick(playersao);
3188                         }
3189                         else if(scriptapi_item_on_place(m_lua,
3190                                         item, playersao, pointed))
3191                         {
3192                                 // Placement was handled in lua
3193
3194                                 // Apply returned ItemStack
3195                                 playersao->setWieldedItem(item);
3196                         }
3197
3198                         // If item has node placement prediction, always send the above
3199                         // node to make sure the client knows what exactly happened
3200                         if(item.getDefinition(m_itemdef).node_placement_prediction != ""){
3201                                 RemoteClient *client = getClient(peer_id);
3202                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3203                                 client->SetBlockNotSent(blockpos);
3204                         }
3205                 } // action == 3
3206
3207                 /*
3208                         4: use
3209                 */
3210                 else if(action == 4)
3211                 {
3212                         ItemStack item = playersao->getWieldedItem();
3213
3214                         actionstream<<player->getName()<<" uses "<<item.name
3215                                         <<", pointing at "<<pointed.dump()<<std::endl;
3216
3217                         if(scriptapi_item_on_use(m_lua,
3218                                         item, playersao, pointed))
3219                         {
3220                                 // Apply returned ItemStack
3221                                 playersao->setWieldedItem(item);
3222                         }
3223
3224                 } // action == 4
3225
3226
3227                 /*
3228                         Catch invalid actions
3229                 */
3230                 else
3231                 {
3232                         infostream<<"WARNING: Server: Invalid action "
3233                                         <<action<<std::endl;
3234                 }
3235         }
3236         else if(command == TOSERVER_REMOVED_SOUNDS)
3237         {
3238                 std::string datastring((char*)&data[2], datasize-2);
3239                 std::istringstream is(datastring, std::ios_base::binary);
3240
3241                 int num = readU16(is);
3242                 for(int k=0; k<num; k++){
3243                         s32 id = readS32(is);
3244                         std::map<s32, ServerPlayingSound>::iterator i =
3245                                         m_playing_sounds.find(id);
3246                         if(i == m_playing_sounds.end())
3247                                 continue;
3248                         ServerPlayingSound &psound = i->second;
3249                         psound.clients.erase(peer_id);
3250                         if(psound.clients.size() == 0)
3251                                 m_playing_sounds.erase(i++);
3252                 }
3253         }
3254         else if(command == TOSERVER_NODEMETA_FIELDS)
3255         {
3256                 std::string datastring((char*)&data[2], datasize-2);
3257                 std::istringstream is(datastring, std::ios_base::binary);
3258
3259                 v3s16 p = readV3S16(is);
3260                 std::string formname = deSerializeString(is);
3261                 int num = readU16(is);
3262                 std::map<std::string, std::string> fields;
3263                 for(int k=0; k<num; k++){
3264                         std::string fieldname = deSerializeString(is);
3265                         std::string fieldvalue = deSerializeLongString(is);
3266                         fields[fieldname] = fieldvalue;
3267                 }
3268
3269                 // If something goes wrong, this player is to blame
3270                 RollbackScopeActor rollback_scope(m_rollback,
3271                                 std::string("player:")+player->getName());
3272
3273                 // Check the target node for rollback data; leave others unnoticed
3274                 RollbackNode rn_old(&m_env->getMap(), p, this);
3275
3276                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3277                                 playersao);
3278
3279                 // Report rollback data
3280                 RollbackNode rn_new(&m_env->getMap(), p, this);
3281                 if(rollback() && rn_new != rn_old){
3282                         RollbackAction action;
3283                         action.setSetNode(p, rn_old, rn_new);
3284                         rollback()->reportAction(action);
3285                 }
3286         }
3287         else if(command == TOSERVER_INVENTORY_FIELDS)
3288         {
3289                 std::string datastring((char*)&data[2], datasize-2);
3290                 std::istringstream is(datastring, std::ios_base::binary);
3291
3292                 std::string formname = deSerializeString(is);
3293                 int num = readU16(is);
3294                 std::map<std::string, std::string> fields;
3295                 for(int k=0; k<num; k++){
3296                         std::string fieldname = deSerializeString(is);
3297                         std::string fieldvalue = deSerializeLongString(is);
3298                         fields[fieldname] = fieldvalue;
3299                 }
3300
3301                 scriptapi_on_player_receive_fields(m_lua, playersao, formname, fields);
3302         }
3303         else
3304         {
3305                 infostream<<"Server::ProcessData(): Ignoring "
3306                                 "unknown command "<<command<<std::endl;
3307         }
3308
3309         } //try
3310         catch(SendFailedException &e)
3311         {
3312                 errorstream<<"Server::ProcessData(): SendFailedException: "
3313                                 <<"what="<<e.what()
3314                                 <<std::endl;
3315         }
3316 }
3317
3318 void Server::onMapEditEvent(MapEditEvent *event)
3319 {
3320         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3321         if(m_ignore_map_edit_events)
3322                 return;
3323         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3324                 return;
3325         MapEditEvent *e = event->clone();
3326         m_unsent_map_edit_queue.push_back(e);
3327 }
3328
3329 Inventory* Server::getInventory(const InventoryLocation &loc)
3330 {
3331         switch(loc.type){
3332         case InventoryLocation::UNDEFINED:
3333         {}
3334         break;
3335         case InventoryLocation::CURRENT_PLAYER:
3336         {}
3337         break;
3338         case InventoryLocation::PLAYER:
3339         {
3340                 Player *player = m_env->getPlayer(loc.name.c_str());
3341                 if(!player)
3342                         return NULL;
3343                 PlayerSAO *playersao = player->getPlayerSAO();
3344                 if(!playersao)
3345                         return NULL;
3346                 return playersao->getInventory();
3347         }
3348         break;
3349         case InventoryLocation::NODEMETA:
3350         {
3351                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3352                 if(!meta)
3353                         return NULL;
3354                 return meta->getInventory();
3355         }
3356         break;
3357         case InventoryLocation::DETACHED:
3358         {
3359                 if(m_detached_inventories.count(loc.name) == 0)
3360                         return NULL;
3361                 return m_detached_inventories[loc.name];
3362         }
3363         break;
3364         default:
3365                 assert(0);
3366         }
3367         return NULL;
3368 }
3369 void Server::setInventoryModified(const InventoryLocation &loc)
3370 {
3371         switch(loc.type){
3372         case InventoryLocation::UNDEFINED:
3373         {}
3374         break;
3375         case InventoryLocation::PLAYER:
3376         {
3377                 Player *player = m_env->getPlayer(loc.name.c_str());
3378                 if(!player)
3379                         return;
3380                 PlayerSAO *playersao = player->getPlayerSAO();
3381                 if(!playersao)
3382                         return;
3383                 playersao->m_inventory_not_sent = true;
3384                 playersao->m_wielded_item_not_sent = true;
3385         }
3386         break;
3387         case InventoryLocation::NODEMETA:
3388         {
3389                 v3s16 blockpos = getNodeBlockPos(loc.p);
3390
3391                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3392                 if(block)
3393                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3394
3395                 setBlockNotSent(blockpos);
3396         }
3397         break;
3398         case InventoryLocation::DETACHED:
3399         {
3400                 sendDetachedInventoryToAll(loc.name);
3401         }
3402         break;
3403         default:
3404                 assert(0);
3405         }
3406 }
3407
3408 core::list<PlayerInfo> Server::getPlayerInfo()
3409 {
3410         DSTACK(__FUNCTION_NAME);
3411         JMutexAutoLock envlock(m_env_mutex);
3412         JMutexAutoLock conlock(m_con_mutex);
3413
3414         core::list<PlayerInfo> list;
3415
3416         core::list<Player*> players = m_env->getPlayers();
3417
3418         core::list<Player*>::Iterator i;
3419         for(i = players.begin();
3420                         i != players.end(); i++)
3421         {
3422                 PlayerInfo info;
3423
3424                 Player *player = *i;
3425
3426                 try{
3427                         // Copy info from connection to info struct
3428                         info.id = player->peer_id;
3429                         info.address = m_con.GetPeerAddress(player->peer_id);
3430                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3431                 }
3432                 catch(con::PeerNotFoundException &e)
3433                 {
3434                         // Set dummy peer info
3435                         info.id = 0;
3436                         info.address = Address(0,0,0,0,0);
3437                         info.avg_rtt = 0.0;
3438                 }
3439
3440                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3441                 info.position = player->getPosition();
3442
3443                 list.push_back(info);
3444         }
3445
3446         return list;
3447 }
3448
3449
3450 void Server::peerAdded(con::Peer *peer)
3451 {
3452         DSTACK(__FUNCTION_NAME);
3453         verbosestream<<"Server::peerAdded(): peer->id="
3454                         <<peer->id<<std::endl;
3455
3456         PeerChange c;
3457         c.type = PEER_ADDED;
3458         c.peer_id = peer->id;
3459         c.timeout = false;
3460         m_peer_change_queue.push_back(c);
3461 }
3462
3463 void Server::deletingPeer(con::Peer *peer, bool timeout)
3464 {
3465         DSTACK(__FUNCTION_NAME);
3466         verbosestream<<"Server::deletingPeer(): peer->id="
3467                         <<peer->id<<", timeout="<<timeout<<std::endl;
3468
3469         PeerChange c;
3470         c.type = PEER_REMOVED;
3471         c.peer_id = peer->id;
3472         c.timeout = timeout;
3473         m_peer_change_queue.push_back(c);
3474 }
3475
3476 /*
3477         Static send methods
3478 */
3479
3480 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3481 {
3482         DSTACK(__FUNCTION_NAME);
3483         std::ostringstream os(std::ios_base::binary);
3484
3485         writeU16(os, TOCLIENT_HP);
3486         writeU8(os, hp);
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::SendAccessDenied(con::Connection &con, u16 peer_id,
3496                 const std::wstring &reason)
3497 {
3498         DSTACK(__FUNCTION_NAME);
3499         std::ostringstream os(std::ios_base::binary);
3500
3501         writeU16(os, TOCLIENT_ACCESS_DENIED);
3502         os<<serializeWideString(reason);
3503
3504         // Make data buffer
3505         std::string s = os.str();
3506         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3507         // Send as reliable
3508         con.Send(peer_id, 0, data, true);
3509 }
3510
3511 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3512                 bool set_camera_point_target, v3f camera_point_target)
3513 {
3514         DSTACK(__FUNCTION_NAME);
3515         std::ostringstream os(std::ios_base::binary);
3516
3517         writeU16(os, TOCLIENT_DEATHSCREEN);
3518         writeU8(os, set_camera_point_target);
3519         writeV3F1000(os, camera_point_target);
3520
3521         // Make data buffer
3522         std::string s = os.str();
3523         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3524         // Send as reliable
3525         con.Send(peer_id, 0, data, true);
3526 }
3527
3528 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3529                 IItemDefManager *itemdef)
3530 {
3531         DSTACK(__FUNCTION_NAME);
3532         std::ostringstream os(std::ios_base::binary);
3533
3534         /*
3535                 u16 command
3536                 u32 length of the next item
3537                 zlib-compressed serialized ItemDefManager
3538         */
3539         writeU16(os, TOCLIENT_ITEMDEF);
3540         std::ostringstream tmp_os(std::ios::binary);
3541         itemdef->serialize(tmp_os);
3542         std::ostringstream tmp_os2(std::ios::binary);
3543         compressZlib(tmp_os.str(), tmp_os2);
3544         os<<serializeLongString(tmp_os2.str());
3545
3546         // Make data buffer
3547         std::string s = os.str();
3548         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3549                         <<"): size="<<s.size()<<std::endl;
3550         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3551         // Send as reliable
3552         con.Send(peer_id, 0, data, true);
3553 }
3554
3555 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3556                 INodeDefManager *nodedef, u16 protocol_version)
3557 {
3558         DSTACK(__FUNCTION_NAME);
3559         std::ostringstream os(std::ios_base::binary);
3560
3561         /*
3562                 u16 command
3563                 u32 length of the next item
3564                 zlib-compressed serialized NodeDefManager
3565         */
3566         writeU16(os, TOCLIENT_NODEDEF);
3567         std::ostringstream tmp_os(std::ios::binary);
3568         nodedef->serialize(tmp_os, protocol_version);
3569         std::ostringstream tmp_os2(std::ios::binary);
3570         compressZlib(tmp_os.str(), tmp_os2);
3571         os<<serializeLongString(tmp_os2.str());
3572
3573         // Make data buffer
3574         std::string s = os.str();
3575         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3576                         <<"): size="<<s.size()<<std::endl;
3577         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3578         // Send as reliable
3579         con.Send(peer_id, 0, data, true);
3580 }
3581
3582 /*
3583         Non-static send methods
3584 */
3585
3586 void Server::SendInventory(u16 peer_id)
3587 {
3588         DSTACK(__FUNCTION_NAME);
3589
3590         PlayerSAO *playersao = getPlayerSAO(peer_id);
3591         assert(playersao);
3592
3593         playersao->m_inventory_not_sent = false;
3594
3595         /*
3596                 Serialize it
3597         */
3598
3599         std::ostringstream os;
3600         playersao->getInventory()->serialize(os);
3601
3602         std::string s = os.str();
3603
3604         SharedBuffer<u8> data(s.size()+2);
3605         writeU16(&data[0], TOCLIENT_INVENTORY);
3606         memcpy(&data[2], s.c_str(), s.size());
3607
3608         // Send as reliable
3609         m_con.Send(peer_id, 0, data, true);
3610 }
3611
3612 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3613 {
3614         DSTACK(__FUNCTION_NAME);
3615
3616         std::ostringstream os(std::ios_base::binary);
3617         u8 buf[12];
3618
3619         // Write command
3620         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3621         os.write((char*)buf, 2);
3622
3623         // Write length
3624         writeU16(buf, message.size());
3625         os.write((char*)buf, 2);
3626
3627         // Write string
3628         for(u32 i=0; i<message.size(); i++)
3629         {
3630                 u16 w = message[i];
3631                 writeU16(buf, w);
3632                 os.write((char*)buf, 2);
3633         }
3634
3635         // Make data buffer
3636         std::string s = os.str();
3637         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3638         // Send as reliable
3639         m_con.Send(peer_id, 0, data, true);
3640 }
3641
3642 void Server::BroadcastChatMessage(const std::wstring &message)
3643 {
3644         for(core::map<u16, RemoteClient*>::Iterator
3645                 i = m_clients.getIterator();
3646                 i.atEnd() == false; i++)
3647         {
3648                 // Get client and check that it is valid
3649                 RemoteClient *client = i.getNode()->getValue();
3650                 assert(client->peer_id == i.getNode()->getKey());
3651                 if(client->serialization_version == SER_FMT_VER_INVALID)
3652                         continue;
3653
3654                 SendChatMessage(client->peer_id, message);
3655         }
3656 }
3657
3658 void Server::SendPlayerHP(u16 peer_id)
3659 {
3660         DSTACK(__FUNCTION_NAME);
3661         PlayerSAO *playersao = getPlayerSAO(peer_id);
3662         assert(playersao);
3663         playersao->m_hp_not_sent = false;
3664         SendHP(m_con, peer_id, playersao->getHP());
3665 }
3666
3667 void Server::SendMovePlayer(u16 peer_id)
3668 {
3669         DSTACK(__FUNCTION_NAME);
3670         Player *player = m_env->getPlayer(peer_id);
3671         assert(player);
3672
3673         std::ostringstream os(std::ios_base::binary);
3674         writeU16(os, TOCLIENT_MOVE_PLAYER);
3675         writeV3F1000(os, player->getPosition());
3676         writeF1000(os, player->getPitch());
3677         writeF1000(os, player->getYaw());
3678
3679         {
3680                 v3f pos = player->getPosition();
3681                 f32 pitch = player->getPitch();
3682                 f32 yaw = player->getYaw();
3683                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3684                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3685                                 <<" pitch="<<pitch
3686                                 <<" yaw="<<yaw
3687                                 <<std::endl;
3688         }
3689
3690         // Make data buffer
3691         std::string s = os.str();
3692         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3693         // Send as reliable
3694         m_con.Send(peer_id, 0, data, true);
3695 }
3696
3697 void Server::SendPlayerPrivileges(u16 peer_id)
3698 {
3699         Player *player = m_env->getPlayer(peer_id);
3700         assert(player);
3701         if(player->peer_id == PEER_ID_INEXISTENT)
3702                 return;
3703
3704         std::set<std::string> privs;
3705         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3706
3707         std::ostringstream os(std::ios_base::binary);
3708         writeU16(os, TOCLIENT_PRIVILEGES);
3709         writeU16(os, privs.size());
3710         for(std::set<std::string>::const_iterator i = privs.begin();
3711                         i != privs.end(); i++){
3712                 os<<serializeString(*i);
3713         }
3714
3715         // Make data buffer
3716         std::string s = os.str();
3717         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3718         // Send as reliable
3719         m_con.Send(peer_id, 0, data, true);
3720 }
3721
3722 void Server::SendPlayerInventoryFormspec(u16 peer_id)
3723 {
3724         Player *player = m_env->getPlayer(peer_id);
3725         assert(player);
3726         if(player->peer_id == PEER_ID_INEXISTENT)
3727                 return;
3728
3729         std::ostringstream os(std::ios_base::binary);
3730         writeU16(os, TOCLIENT_INVENTORY_FORMSPEC);
3731         os<<serializeLongString(player->inventory_formspec);
3732
3733         // Make data buffer
3734         std::string s = os.str();
3735         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3736         // Send as reliable
3737         m_con.Send(peer_id, 0, data, true);
3738 }
3739
3740 s32 Server::playSound(const SimpleSoundSpec &spec,
3741                 const ServerSoundParams &params)
3742 {
3743         // Find out initial position of sound
3744         bool pos_exists = false;
3745         v3f pos = params.getPos(m_env, &pos_exists);
3746         // If position is not found while it should be, cancel sound
3747         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3748                 return -1;
3749         // Filter destination clients
3750         std::set<RemoteClient*> dst_clients;
3751         if(params.to_player != "")
3752         {
3753                 Player *player = m_env->getPlayer(params.to_player.c_str());
3754                 if(!player){
3755                         infostream<<"Server::playSound: Player \""<<params.to_player
3756                                         <<"\" not found"<<std::endl;
3757                         return -1;
3758                 }
3759                 if(player->peer_id == PEER_ID_INEXISTENT){
3760                         infostream<<"Server::playSound: Player \""<<params.to_player
3761                                         <<"\" not connected"<<std::endl;
3762                         return -1;
3763                 }
3764                 RemoteClient *client = getClient(player->peer_id);
3765                 dst_clients.insert(client);
3766         }
3767         else
3768         {
3769                 for(core::map<u16, RemoteClient*>::Iterator
3770                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3771                 {
3772                         RemoteClient *client = i.getNode()->getValue();
3773                         Player *player = m_env->getPlayer(client->peer_id);
3774                         if(!player)
3775                                 continue;
3776                         if(pos_exists){
3777                                 if(player->getPosition().getDistanceFrom(pos) >
3778                                                 params.max_hear_distance)
3779                                         continue;
3780                         }
3781                         dst_clients.insert(client);
3782                 }
3783         }
3784         if(dst_clients.size() == 0)
3785                 return -1;
3786         // Create the sound
3787         s32 id = m_next_sound_id++;
3788         // The sound will exist as a reference in m_playing_sounds
3789         m_playing_sounds[id] = ServerPlayingSound();
3790         ServerPlayingSound &psound = m_playing_sounds[id];
3791         psound.params = params;
3792         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3793                         i != dst_clients.end(); i++)
3794                 psound.clients.insert((*i)->peer_id);
3795         // Create packet
3796         std::ostringstream os(std::ios_base::binary);
3797         writeU16(os, TOCLIENT_PLAY_SOUND);
3798         writeS32(os, id);
3799         os<<serializeString(spec.name);
3800         writeF1000(os, spec.gain * params.gain);
3801         writeU8(os, params.type);
3802         writeV3F1000(os, pos);
3803         writeU16(os, params.object);
3804         writeU8(os, params.loop);
3805         // Make data buffer
3806         std::string s = os.str();
3807         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3808         // Send
3809         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3810                         i != dst_clients.end(); i++){
3811                 // Send as reliable
3812                 m_con.Send((*i)->peer_id, 0, data, true);
3813         }
3814         return id;
3815 }
3816 void Server::stopSound(s32 handle)
3817 {
3818         // Get sound reference
3819         std::map<s32, ServerPlayingSound>::iterator i =
3820                         m_playing_sounds.find(handle);
3821         if(i == m_playing_sounds.end())
3822                 return;
3823         ServerPlayingSound &psound = i->second;
3824         // Create packet
3825         std::ostringstream os(std::ios_base::binary);
3826         writeU16(os, TOCLIENT_STOP_SOUND);
3827         writeS32(os, handle);
3828         // Make data buffer
3829         std::string s = os.str();
3830         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3831         // Send
3832         for(std::set<u16>::iterator i = psound.clients.begin();
3833                         i != psound.clients.end(); i++){
3834                 // Send as reliable
3835                 m_con.Send(*i, 0, data, true);
3836         }
3837         // Remove sound reference
3838         m_playing_sounds.erase(i);
3839 }
3840
3841 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3842         core::list<u16> *far_players, float far_d_nodes)
3843 {
3844         float maxd = far_d_nodes*BS;
3845         v3f p_f = intToFloat(p, BS);
3846
3847         // Create packet
3848         u32 replysize = 8;
3849         SharedBuffer<u8> reply(replysize);
3850         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3851         writeS16(&reply[2], p.X);
3852         writeS16(&reply[4], p.Y);
3853         writeS16(&reply[6], p.Z);
3854
3855         for(core::map<u16, RemoteClient*>::Iterator
3856                 i = m_clients.getIterator();
3857                 i.atEnd() == false; i++)
3858         {
3859                 // Get client and check that it is valid
3860                 RemoteClient *client = i.getNode()->getValue();
3861                 assert(client->peer_id == i.getNode()->getKey());
3862                 if(client->serialization_version == SER_FMT_VER_INVALID)
3863                         continue;
3864
3865                 // Don't send if it's the same one
3866                 if(client->peer_id == ignore_id)
3867                         continue;
3868
3869                 if(far_players)
3870                 {
3871                         // Get player
3872                         Player *player = m_env->getPlayer(client->peer_id);
3873                         if(player)
3874                         {
3875                                 // If player is far away, only set modified blocks not sent
3876                                 v3f player_pos = player->getPosition();
3877                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3878                                 {
3879                                         far_players->push_back(client->peer_id);
3880                                         continue;
3881                                 }
3882                         }
3883                 }
3884
3885                 // Send as reliable
3886                 m_con.Send(client->peer_id, 0, reply, true);
3887         }
3888 }
3889
3890 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3891                 core::list<u16> *far_players, float far_d_nodes)
3892 {
3893         float maxd = far_d_nodes*BS;
3894         v3f p_f = intToFloat(p, BS);
3895
3896         for(core::map<u16, RemoteClient*>::Iterator
3897                 i = m_clients.getIterator();
3898                 i.atEnd() == false; i++)
3899         {
3900                 // Get client and check that it is valid
3901                 RemoteClient *client = i.getNode()->getValue();
3902                 assert(client->peer_id == i.getNode()->getKey());
3903                 if(client->serialization_version == SER_FMT_VER_INVALID)
3904                         continue;
3905
3906                 // Don't send if it's the same one
3907                 if(client->peer_id == ignore_id)
3908                         continue;
3909
3910                 if(far_players)
3911                 {
3912                         // Get player
3913                         Player *player = m_env->getPlayer(client->peer_id);
3914                         if(player)
3915                         {
3916                                 // If player is far away, only set modified blocks not sent
3917                                 v3f player_pos = player->getPosition();
3918                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3919                                 {
3920                                         far_players->push_back(client->peer_id);
3921                                         continue;
3922                                 }
3923                         }
3924                 }
3925
3926                 // Create packet
3927                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3928                 SharedBuffer<u8> reply(replysize);
3929                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3930                 writeS16(&reply[2], p.X);
3931                 writeS16(&reply[4], p.Y);
3932                 writeS16(&reply[6], p.Z);
3933                 n.serialize(&reply[8], client->serialization_version);
3934
3935                 // Send as reliable
3936                 m_con.Send(client->peer_id, 0, reply, true);
3937         }
3938 }
3939
3940 void Server::setBlockNotSent(v3s16 p)
3941 {
3942         for(core::map<u16, RemoteClient*>::Iterator
3943                 i = m_clients.getIterator();
3944                 i.atEnd()==false; i++)
3945         {
3946                 RemoteClient *client = i.getNode()->getValue();
3947                 client->SetBlockNotSent(p);
3948         }
3949 }
3950
3951 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3952 {
3953         DSTACK(__FUNCTION_NAME);
3954
3955         v3s16 p = block->getPos();
3956
3957 #if 0
3958         // Analyze it a bit
3959         bool completely_air = true;
3960         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3961         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3962         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3963         {
3964                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3965                 {
3966                         completely_air = false;
3967                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3968                 }
3969         }
3970
3971         // Print result
3972         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3973         if(completely_air)
3974                 infostream<<"[completely air] ";
3975         infostream<<std::endl;
3976 #endif
3977
3978         /*
3979                 Create a packet with the block in the right format
3980         */
3981
3982         std::ostringstream os(std::ios_base::binary);
3983         block->serialize(os, ver, false);
3984         std::string s = os.str();
3985         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3986
3987         u32 replysize = 8 + blockdata.getSize();
3988         SharedBuffer<u8> reply(replysize);
3989         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3990         writeS16(&reply[2], p.X);
3991         writeS16(&reply[4], p.Y);
3992         writeS16(&reply[6], p.Z);
3993         memcpy(&reply[8], *blockdata, blockdata.getSize());
3994
3995         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3996                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3997
3998         /*
3999                 Send packet
4000         */
4001         m_con.Send(peer_id, 1, reply, true);
4002 }
4003
4004 void Server::SendBlocks(float dtime)
4005 {
4006         DSTACK(__FUNCTION_NAME);
4007
4008         JMutexAutoLock envlock(m_env_mutex);
4009         JMutexAutoLock conlock(m_con_mutex);
4010
4011         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
4012
4013         core::array<PrioritySortedBlockTransfer> queue;
4014
4015         s32 total_sending = 0;
4016
4017         {
4018                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
4019
4020                 for(core::map<u16, RemoteClient*>::Iterator
4021                         i = m_clients.getIterator();
4022                         i.atEnd() == false; i++)
4023                 {
4024                         RemoteClient *client = i.getNode()->getValue();
4025                         assert(client->peer_id == i.getNode()->getKey());
4026
4027                         // If definitions and textures have not been sent, don't
4028                         // send MapBlocks either
4029                         if(!client->definitions_sent)
4030                                 continue;
4031
4032                         total_sending += client->SendingCount();
4033
4034                         if(client->serialization_version == SER_FMT_VER_INVALID)
4035                                 continue;
4036
4037                         client->GetNextBlocks(this, dtime, queue);
4038                 }
4039         }
4040
4041         // Sort.
4042         // Lowest priority number comes first.
4043         // Lowest is most important.
4044         queue.sort();
4045
4046         for(u32 i=0; i<queue.size(); i++)
4047         {
4048                 //TODO: Calculate limit dynamically
4049                 if(total_sending >= g_settings->getS32
4050                                 ("max_simultaneous_block_sends_server_total"))
4051                         break;
4052
4053                 PrioritySortedBlockTransfer q = queue[i];
4054
4055                 MapBlock *block = NULL;
4056                 try
4057                 {
4058                         block = m_env->getMap().getBlockNoCreate(q.pos);
4059                 }
4060                 catch(InvalidPositionException &e)
4061                 {
4062                         continue;
4063                 }
4064
4065                 RemoteClient *client = getClient(q.peer_id);
4066
4067                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
4068
4069                 client->SentBlock(q.pos);
4070
4071                 total_sending++;
4072         }
4073 }
4074
4075 void Server::fillMediaCache()
4076 {
4077         DSTACK(__FUNCTION_NAME);
4078
4079         infostream<<"Server: Calculating media file checksums"<<std::endl;
4080
4081         // Collect all media file paths
4082         std::list<std::string> paths;
4083         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4084                         i != m_mods.end(); i++){
4085                 const ModSpec &mod = *i;
4086                 paths.push_back(mod.path + DIR_DELIM + "textures");
4087                 paths.push_back(mod.path + DIR_DELIM + "sounds");
4088                 paths.push_back(mod.path + DIR_DELIM + "media");
4089                 paths.push_back(mod.path + DIR_DELIM + "models");
4090         }
4091         std::string path_all = "textures";
4092         paths.push_back(path_all + DIR_DELIM + "all");
4093
4094         // Collect media file information from paths into cache
4095         for(std::list<std::string>::iterator i = paths.begin();
4096                         i != paths.end(); i++)
4097         {
4098                 std::string mediapath = *i;
4099                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
4100                 for(u32 j=0; j<dirlist.size(); j++){
4101                         if(dirlist[j].dir) // Ignode dirs
4102                                 continue;
4103                         std::string filename = dirlist[j].name;
4104                         // If name contains illegal characters, ignore the file
4105                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
4106                                 infostream<<"Server: ignoring illegal file name: \""
4107                                                 <<filename<<"\""<<std::endl;
4108                                 continue;
4109                         }
4110                         // If name is not in a supported format, ignore it
4111                         const char *supported_ext[] = {
4112                                 ".png", ".jpg", ".bmp", ".tga",
4113                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
4114                                 ".ogg",
4115                                 ".x", ".b3d", ".md2", ".obj",
4116                                 NULL
4117                         };
4118                         if(removeStringEnd(filename, supported_ext) == ""){
4119                                 infostream<<"Server: ignoring unsupported file extension: \""
4120                                                 <<filename<<"\""<<std::endl;
4121                                 continue;
4122                         }
4123                         // Ok, attempt to load the file and add to cache
4124                         std::string filepath = mediapath + DIR_DELIM + filename;
4125                         // Read data
4126                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
4127                         if(fis.good() == false){
4128                                 errorstream<<"Server::fillMediaCache(): Could not open \""
4129                                                 <<filename<<"\" for reading"<<std::endl;
4130                                 continue;
4131                         }
4132                         std::ostringstream tmp_os(std::ios_base::binary);
4133                         bool bad = false;
4134                         for(;;){
4135                                 char buf[1024];
4136                                 fis.read(buf, 1024);
4137                                 std::streamsize len = fis.gcount();
4138                                 tmp_os.write(buf, len);
4139                                 if(fis.eof())
4140                                         break;
4141                                 if(!fis.good()){
4142                                         bad = true;
4143                                         break;
4144                                 }
4145                         }
4146                         if(bad){
4147                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
4148                                                 <<filename<<"\""<<std::endl;
4149                                 continue;
4150                         }
4151                         if(tmp_os.str().length() == 0){
4152                                 errorstream<<"Server::fillMediaCache(): Empty file \""
4153                                                 <<filepath<<"\""<<std::endl;
4154                                 continue;
4155                         }
4156
4157                         SHA1 sha1;
4158                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
4159
4160                         unsigned char *digest = sha1.getDigest();
4161                         std::string sha1_base64 = base64_encode(digest, 20);
4162                         std::string sha1_hex = hex_encode((char*)digest, 20);
4163                         free(digest);
4164
4165                         // Put in list
4166                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4167                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4168                 }
4169         }
4170 }
4171
4172 struct SendableMediaAnnouncement
4173 {
4174         std::string name;
4175         std::string sha1_digest;
4176
4177         SendableMediaAnnouncement(const std::string name_="",
4178                         const std::string sha1_digest_=""):
4179                 name(name_),
4180                 sha1_digest(sha1_digest_)
4181         {}
4182 };
4183
4184 void Server::sendMediaAnnouncement(u16 peer_id)
4185 {
4186         DSTACK(__FUNCTION_NAME);
4187
4188         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4189                         <<std::endl;
4190
4191         core::list<SendableMediaAnnouncement> file_announcements;
4192
4193         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4194                         i != m_media.end(); i++){
4195                 // Put in list
4196                 file_announcements.push_back(
4197                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4198         }
4199
4200         // Make packet
4201         std::ostringstream os(std::ios_base::binary);
4202
4203         /*
4204                 u16 command
4205                 u32 number of files
4206                 for each texture {
4207                         u16 length of name
4208                         string name
4209                         u16 length of sha1_digest
4210                         string sha1_digest
4211                 }
4212         */
4213
4214         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4215         writeU16(os, file_announcements.size());
4216
4217         for(core::list<SendableMediaAnnouncement>::Iterator
4218                         j = file_announcements.begin();
4219                         j != file_announcements.end(); j++){
4220                 os<<serializeString(j->name);
4221                 os<<serializeString(j->sha1_digest);
4222         }
4223         os<<serializeString(g_settings->get("remote_media"));
4224
4225         // Make data buffer
4226         std::string s = os.str();
4227         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4228
4229         // Send as reliable
4230         m_con.Send(peer_id, 0, data, true);
4231 }
4232
4233 struct SendableMedia
4234 {
4235         std::string name;
4236         std::string path;
4237         std::string data;
4238
4239         SendableMedia(const std::string &name_="", const std::string path_="",
4240                         const std::string &data_=""):
4241                 name(name_),
4242                 path(path_),
4243                 data(data_)
4244         {}
4245 };
4246
4247 void Server::sendRequestedMedia(u16 peer_id,
4248                 const core::list<MediaRequest> &tosend)
4249 {
4250         DSTACK(__FUNCTION_NAME);
4251
4252         verbosestream<<"Server::sendRequestedMedia(): "
4253                         <<"Sending files to client"<<std::endl;
4254
4255         /* Read files */
4256
4257         // Put 5kB in one bunch (this is not accurate)
4258         u32 bytes_per_bunch = 5000;
4259
4260         core::array< core::list<SendableMedia> > file_bunches;
4261         file_bunches.push_back(core::list<SendableMedia>());
4262
4263         u32 file_size_bunch_total = 0;
4264
4265         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4266                         i != tosend.end(); i++)
4267         {
4268                 if(m_media.find(i->name) == m_media.end()){
4269                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4270                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4271                         continue;
4272                 }
4273
4274                 //TODO get path + name
4275                 std::string tpath = m_media[(*i).name].path;
4276
4277                 // Read data
4278                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4279                 if(fis.good() == false){
4280                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4281                                         <<tpath<<"\" for reading"<<std::endl;
4282                         continue;
4283                 }
4284                 std::ostringstream tmp_os(std::ios_base::binary);
4285                 bool bad = false;
4286                 for(;;){
4287                         char buf[1024];
4288                         fis.read(buf, 1024);
4289                         std::streamsize len = fis.gcount();
4290                         tmp_os.write(buf, len);
4291                         file_size_bunch_total += len;
4292                         if(fis.eof())
4293                                 break;
4294                         if(!fis.good()){
4295                                 bad = true;
4296                                 break;
4297                         }
4298                 }
4299                 if(bad){
4300                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4301                                         <<(*i).name<<"\""<<std::endl;
4302                         continue;
4303                 }
4304                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4305                                 <<tname<<"\""<<std::endl;*/
4306                 // Put in list
4307                 file_bunches[file_bunches.size()-1].push_back(
4308                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4309
4310                 // Start next bunch if got enough data
4311                 if(file_size_bunch_total >= bytes_per_bunch){
4312                         file_bunches.push_back(core::list<SendableMedia>());
4313                         file_size_bunch_total = 0;
4314                 }
4315
4316         }
4317
4318         /* Create and send packets */
4319
4320         u32 num_bunches = file_bunches.size();
4321         for(u32 i=0; i<num_bunches; i++)
4322         {
4323                 std::ostringstream os(std::ios_base::binary);
4324
4325                 /*
4326                         u16 command
4327                         u16 total number of texture bunches
4328                         u16 index of this bunch
4329                         u32 number of files in this bunch
4330                         for each file {
4331                                 u16 length of name
4332                                 string name
4333                                 u32 length of data
4334                                 data
4335                         }
4336                 */
4337
4338                 writeU16(os, TOCLIENT_MEDIA);
4339                 writeU16(os, num_bunches);
4340                 writeU16(os, i);
4341                 writeU32(os, file_bunches[i].size());
4342
4343                 for(core::list<SendableMedia>::Iterator
4344                                 j = file_bunches[i].begin();
4345                                 j != file_bunches[i].end(); j++){
4346                         os<<serializeString(j->name);
4347                         os<<serializeLongString(j->data);
4348                 }
4349
4350                 // Make data buffer
4351                 std::string s = os.str();
4352                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4353                                 <<i<<"/"<<num_bunches
4354                                 <<" files="<<file_bunches[i].size()
4355                                 <<" size=" <<s.size()<<std::endl;
4356                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4357                 // Send as reliable
4358                 m_con.Send(peer_id, 0, data, true);
4359         }
4360 }
4361
4362 void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
4363 {
4364         if(m_detached_inventories.count(name) == 0){
4365                 errorstream<<__FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
4366                 return;
4367         }
4368         Inventory *inv = m_detached_inventories[name];
4369
4370         std::ostringstream os(std::ios_base::binary);
4371         writeU16(os, TOCLIENT_DETACHED_INVENTORY);
4372         os<<serializeString(name);
4373         inv->serialize(os);
4374
4375         // Make data buffer
4376         std::string s = os.str();
4377         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4378         // Send as reliable
4379         m_con.Send(peer_id, 0, data, true);
4380 }
4381
4382 void Server::sendDetachedInventoryToAll(const std::string &name)
4383 {
4384         DSTACK(__FUNCTION_NAME);
4385
4386         for(core::map<u16, RemoteClient*>::Iterator
4387                         i = m_clients.getIterator();
4388                         i.atEnd() == false; i++){
4389                 RemoteClient *client = i.getNode()->getValue();
4390                 sendDetachedInventory(name, client->peer_id);
4391         }
4392 }
4393
4394 void Server::sendDetachedInventories(u16 peer_id)
4395 {
4396         DSTACK(__FUNCTION_NAME);
4397
4398         for(std::map<std::string, Inventory*>::iterator
4399                         i = m_detached_inventories.begin();
4400                         i != m_detached_inventories.end(); i++){
4401                 const std::string &name = i->first;
4402                 //Inventory *inv = i->second;
4403                 sendDetachedInventory(name, peer_id);
4404         }
4405 }
4406
4407 /*
4408         Something random
4409 */
4410
4411 void Server::DiePlayer(u16 peer_id)
4412 {
4413         DSTACK(__FUNCTION_NAME);
4414
4415         PlayerSAO *playersao = getPlayerSAO(peer_id);
4416         assert(playersao);
4417
4418         infostream<<"Server::DiePlayer(): Player "
4419                         <<playersao->getPlayer()->getName()
4420                         <<" dies"<<std::endl;
4421
4422         playersao->setHP(0);
4423
4424         // Trigger scripted stuff
4425         scriptapi_on_dieplayer(m_lua, playersao);
4426
4427         SendPlayerHP(peer_id);
4428         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4429 }
4430
4431 void Server::RespawnPlayer(u16 peer_id)
4432 {
4433         DSTACK(__FUNCTION_NAME);
4434
4435         PlayerSAO *playersao = getPlayerSAO(peer_id);
4436         assert(playersao);
4437
4438         infostream<<"Server::RespawnPlayer(): Player "
4439                         <<playersao->getPlayer()->getName()
4440                         <<" respawns"<<std::endl;
4441
4442         playersao->setHP(PLAYER_MAX_HP);
4443
4444         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4445         if(!repositioned){
4446                 v3f pos = findSpawnPos(m_env->getServerMap());
4447                 playersao->setPos(pos);
4448         }
4449 }
4450
4451 void Server::UpdateCrafting(u16 peer_id)
4452 {
4453         DSTACK(__FUNCTION_NAME);
4454
4455         Player* player = m_env->getPlayer(peer_id);
4456         assert(player);
4457
4458         // Get a preview for crafting
4459         ItemStack preview;
4460         getCraftingResult(&player->inventory, preview, false, this);
4461
4462         // Put the new preview in
4463         InventoryList *plist = player->inventory.getList("craftpreview");
4464         assert(plist);
4465         assert(plist->getSize() >= 1);
4466         plist->changeItem(0, preview);
4467 }
4468
4469 RemoteClient* Server::getClient(u16 peer_id)
4470 {
4471         DSTACK(__FUNCTION_NAME);
4472         //JMutexAutoLock lock(m_con_mutex);
4473         core::map<u16, RemoteClient*>::Node *n;
4474         n = m_clients.find(peer_id);
4475         // A client should exist for all peers
4476         assert(n != NULL);
4477         return n->getValue();
4478 }
4479
4480 std::wstring Server::getStatusString()
4481 {
4482         std::wostringstream os(std::ios_base::binary);
4483         os<<L"# Server: ";
4484         // Version
4485         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4486         // Uptime
4487         os<<L", uptime="<<m_uptime.get();
4488         // Information about clients
4489         core::map<u16, RemoteClient*>::Iterator i;
4490         bool first;
4491         os<<L", clients={";
4492         for(i = m_clients.getIterator(), first = true;
4493                 i.atEnd() == false; i++)
4494         {
4495                 // Get client and check that it is valid
4496                 RemoteClient *client = i.getNode()->getValue();
4497                 assert(client->peer_id == i.getNode()->getKey());
4498                 if(client->serialization_version == SER_FMT_VER_INVALID)
4499                         continue;
4500                 // Get player
4501                 Player *player = m_env->getPlayer(client->peer_id);
4502                 // Get name of player
4503                 std::wstring name = L"unknown";
4504                 if(player != NULL)
4505                         name = narrow_to_wide(player->getName());
4506                 // Add name to information string
4507                 if(!first)
4508                         os<<L",";
4509                 else
4510                         first = false;
4511                 os<<name;
4512         }
4513         os<<L"}";
4514         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4515                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4516         if(g_settings->get("motd") != "")
4517                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4518         return os.str();
4519 }
4520
4521 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4522 {
4523         std::set<std::string> privs;
4524         scriptapi_get_auth(m_lua, name, NULL, &privs);
4525         return privs;
4526 }
4527
4528 bool Server::checkPriv(const std::string &name, const std::string &priv)
4529 {
4530         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4531         return (privs.count(priv) != 0);
4532 }
4533
4534 void Server::reportPrivsModified(const std::string &name)
4535 {
4536         if(name == ""){
4537                 for(core::map<u16, RemoteClient*>::Iterator
4538                                 i = m_clients.getIterator();
4539                                 i.atEnd() == false; i++){
4540                         RemoteClient *client = i.getNode()->getValue();
4541                         Player *player = m_env->getPlayer(client->peer_id);
4542                         reportPrivsModified(player->getName());
4543                 }
4544         } else {
4545                 Player *player = m_env->getPlayer(name.c_str());
4546                 if(!player)
4547                         return;
4548                 SendPlayerPrivileges(player->peer_id);
4549                 PlayerSAO *sao = player->getPlayerSAO();
4550                 if(!sao)
4551                         return;
4552                 sao->updatePrivileges(
4553                                 getPlayerEffectivePrivs(name),
4554                                 isSingleplayer());
4555         }
4556 }
4557
4558 void Server::reportInventoryFormspecModified(const std::string &name)
4559 {
4560         Player *player = m_env->getPlayer(name.c_str());
4561         if(!player)
4562                 return;
4563         SendPlayerInventoryFormspec(player->peer_id);
4564 }
4565
4566 // Saves g_settings to configpath given at initialization
4567 void Server::saveConfig()
4568 {
4569         if(m_path_config != "")
4570                 g_settings->updateConfigFile(m_path_config.c_str());
4571 }
4572
4573 void Server::notifyPlayer(const char *name, const std::wstring msg)
4574 {
4575         Player *player = m_env->getPlayer(name);
4576         if(!player)
4577                 return;
4578         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4579 }
4580
4581 void Server::notifyPlayers(const std::wstring msg)
4582 {
4583         BroadcastChatMessage(msg);
4584 }
4585
4586 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4587 {
4588         u8 flags = 0;
4589         if(!allow_generate)
4590                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4591         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4592 }
4593
4594 Inventory* Server::createDetachedInventory(const std::string &name)
4595 {
4596         if(m_detached_inventories.count(name) > 0){
4597                 infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
4598                 delete m_detached_inventories[name];
4599         } else {
4600                 infostream<<"Server creating detached inventory \""<<name<<"\""<<std::endl;
4601         }
4602         Inventory *inv = new Inventory(m_itemdef);
4603         assert(inv);
4604         m_detached_inventories[name] = inv;
4605         sendDetachedInventoryToAll(name);
4606         return inv;
4607 }
4608
4609 class BoolScopeSet
4610 {
4611 public:
4612         BoolScopeSet(bool *dst, bool val):
4613                 m_dst(dst)
4614         {
4615                 m_orig_state = *m_dst;
4616                 *m_dst = val;
4617         }
4618         ~BoolScopeSet()
4619         {
4620                 *m_dst = m_orig_state;
4621         }
4622 private:
4623         bool *m_dst;
4624         bool m_orig_state;
4625 };
4626
4627 // actions: time-reversed list
4628 // Return value: success/failure
4629 bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
4630                 std::list<std::string> *log)
4631 {
4632         infostream<<"Server::rollbackRevertActions(len="<<actions.size()<<")"<<std::endl;
4633         ServerMap *map = (ServerMap*)(&m_env->getMap());
4634         // Disable rollback report sink while reverting
4635         BoolScopeSet rollback_scope_disable(&m_rollback_sink_enabled, false);
4636
4637         // Fail if no actions to handle
4638         if(actions.empty()){
4639                 log->push_back("Nothing to do.");
4640                 return false;
4641         }
4642
4643         int num_tried = 0;
4644         int num_failed = 0;
4645
4646         for(std::list<RollbackAction>::const_iterator
4647                         i = actions.begin();
4648                         i != actions.end(); i++)
4649         {
4650                 const RollbackAction &action = *i;
4651                 num_tried++;
4652                 bool success = action.applyRevert(map, this, this);
4653                 if(!success){
4654                         num_failed++;
4655                         std::ostringstream os;
4656                         os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
4657                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4658                         if(log)
4659                                 log->push_back(os.str());
4660                 }else{
4661                         std::ostringstream os;
4662                         os<<"Successfully reverted step ("<<num_tried<<") "<<action.toString();
4663                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4664                         if(log)
4665                                 log->push_back(os.str());
4666                 }
4667         }
4668
4669         infostream<<"Map::rollbackRevertActions(): "<<num_failed<<"/"<<num_tried
4670                         <<" failed"<<std::endl;
4671
4672         // Call it done if less than half failed
4673         return num_failed <= num_tried/2;
4674 }
4675
4676 // IGameDef interface
4677 // Under envlock
4678 IItemDefManager* Server::getItemDefManager()
4679 {
4680         return m_itemdef;
4681 }
4682 INodeDefManager* Server::getNodeDefManager()
4683 {
4684         return m_nodedef;
4685 }
4686 ICraftDefManager* Server::getCraftDefManager()
4687 {
4688         return m_craftdef;
4689 }
4690 ITextureSource* Server::getTextureSource()
4691 {
4692         return NULL;
4693 }
4694 IShaderSource* Server::getShaderSource()
4695 {
4696         return NULL;
4697 }
4698 u16 Server::allocateUnknownNodeId(const std::string &name)
4699 {
4700         return m_nodedef->allocateDummy(name);
4701 }
4702 ISoundManager* Server::getSoundManager()
4703 {
4704         return &dummySoundManager;
4705 }
4706 MtEventManager* Server::getEventManager()
4707 {
4708         return m_event;
4709 }
4710 IRollbackReportSink* Server::getRollbackReportSink()
4711 {
4712         if(!m_enable_rollback_recording)
4713                 return NULL;
4714         if(!m_rollback_sink_enabled)
4715                 return NULL;
4716         return m_rollback;
4717 }
4718
4719 IWritableItemDefManager* Server::getWritableItemDefManager()
4720 {
4721         return m_itemdef;
4722 }
4723 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4724 {
4725         return m_nodedef;
4726 }
4727 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4728 {
4729         return m_craftdef;
4730 }
4731
4732 const ModSpec* Server::getModSpec(const std::string &modname)
4733 {
4734         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4735                         i != m_mods.end(); i++){
4736                 const ModSpec &mod = *i;
4737                 if(mod.name == modname)
4738                         return &mod;
4739         }
4740         return NULL;
4741 }
4742 void Server::getModNames(core::list<std::string> &modlist)
4743 {
4744         for(core::list<ModSpec>::Iterator i = m_mods.begin(); i != m_mods.end(); i++)
4745         {
4746                 modlist.push_back((*i).name);
4747         }
4748 }
4749 std::string Server::getBuiltinLuaPath()
4750 {
4751         return porting::path_share + DIR_DELIM + "builtin";
4752 }
4753
4754 v3f findSpawnPos(ServerMap &map)
4755 {
4756         //return v3f(50,50,50)*BS;
4757
4758         v3s16 nodepos;
4759
4760 #if 0
4761         nodepos = v2s16(0,0);
4762         groundheight = 20;
4763 #endif
4764
4765 #if 1
4766         // Try to find a good place a few times
4767         for(s32 i=0; i<1000; i++)
4768         {
4769                 s32 range = 1 + i;
4770                 // We're going to try to throw the player to this position
4771                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4772                                 -range + (myrand()%(range*2)));
4773                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4774                 // Get ground height at point (fallbacks to heightmap function)
4775                 s16 groundheight = map.findGroundLevel(nodepos2d);
4776                 // Don't go underwater
4777                 if(groundheight < WATER_LEVEL)
4778                 {
4779                         //infostream<<"-> Underwater"<<std::endl;
4780                         continue;
4781                 }
4782                 // Don't go to high places
4783                 if(groundheight > WATER_LEVEL + 4)
4784                 {
4785                         //infostream<<"-> Underwater"<<std::endl;
4786                         continue;
4787                 }
4788
4789                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4790                 bool is_good = false;
4791                 s32 air_count = 0;
4792                 for(s32 i=0; i<10; i++){
4793                         v3s16 blockpos = getNodeBlockPos(nodepos);
4794                         map.emergeBlock(blockpos, true);
4795                         MapNode n = map.getNodeNoEx(nodepos);
4796                         if(n.getContent() == CONTENT_AIR){
4797                                 air_count++;
4798                                 if(air_count >= 2){
4799                                         is_good = true;
4800                                         nodepos.Y -= 1;
4801                                         break;
4802                                 }
4803                         }
4804                         nodepos.Y++;
4805                 }
4806                 if(is_good){
4807                         // Found a good place
4808                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4809                         break;
4810                 }
4811         }
4812 #endif
4813
4814         return intToFloat(nodepos, BS);
4815 }
4816
4817 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4818 {
4819         RemotePlayer *player = NULL;
4820         bool newplayer = false;
4821
4822         /*
4823                 Try to get an existing player
4824         */
4825         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4826
4827         // If player is already connected, cancel
4828         if(player != NULL && player->peer_id != 0)
4829         {
4830                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4831                 return NULL;
4832         }
4833
4834         /*
4835                 If player with the wanted peer_id already exists, cancel.
4836         */
4837         if(m_env->getPlayer(peer_id) != NULL)
4838         {
4839                 infostream<<"emergePlayer(): Player with wrong name but same"
4840                                 " peer_id already exists"<<std::endl;
4841                 return NULL;
4842         }
4843
4844         /*
4845                 Create a new player if it doesn't exist yet
4846         */
4847         if(player == NULL)
4848         {
4849                 newplayer = true;
4850                 player = new RemotePlayer(this);
4851                 player->updateName(name);
4852
4853                 /* Set player position */
4854                 infostream<<"Server: Finding spawn place for player \""
4855                                 <<name<<"\""<<std::endl;
4856                 v3f pos = findSpawnPos(m_env->getServerMap());
4857                 player->setPosition(pos);
4858
4859                 /* Add player to environment */
4860                 m_env->addPlayer(player);
4861         }
4862
4863         /*
4864                 Create a new player active object
4865         */
4866         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4867                         getPlayerEffectivePrivs(player->getName()),
4868                         isSingleplayer());
4869
4870         /* Add object to environment */
4871         m_env->addActiveObject(playersao);
4872
4873         /* Run scripts */
4874         if(newplayer)
4875                 scriptapi_on_newplayer(m_lua, playersao);
4876
4877         scriptapi_on_joinplayer(m_lua, playersao);
4878
4879         return playersao;
4880 }
4881
4882 void Server::handlePeerChange(PeerChange &c)
4883 {
4884         JMutexAutoLock envlock(m_env_mutex);
4885         JMutexAutoLock conlock(m_con_mutex);
4886
4887         if(c.type == PEER_ADDED)
4888         {
4889                 /*
4890                         Add
4891                 */
4892
4893                 // Error check
4894                 core::map<u16, RemoteClient*>::Node *n;
4895                 n = m_clients.find(c.peer_id);
4896                 // The client shouldn't already exist
4897                 assert(n == NULL);
4898
4899                 // Create client
4900                 RemoteClient *client = new RemoteClient();
4901                 client->peer_id = c.peer_id;
4902                 m_clients.insert(client->peer_id, client);
4903
4904         } // PEER_ADDED
4905         else if(c.type == PEER_REMOVED)
4906         {
4907                 /*
4908                         Delete
4909                 */
4910
4911                 // Error check
4912                 core::map<u16, RemoteClient*>::Node *n;
4913                 n = m_clients.find(c.peer_id);
4914                 // The client should exist
4915                 assert(n != NULL);
4916
4917                 /*
4918                         Mark objects to be not known by the client
4919                 */
4920                 RemoteClient *client = n->getValue();
4921                 // Handle objects
4922                 for(core::map<u16, bool>::Iterator
4923                                 i = client->m_known_objects.getIterator();
4924                                 i.atEnd()==false; i++)
4925                 {
4926                         // Get object
4927                         u16 id = i.getNode()->getKey();
4928                         ServerActiveObject* obj = m_env->getActiveObject(id);
4929
4930                         if(obj && obj->m_known_by_count > 0)
4931                                 obj->m_known_by_count--;
4932                 }
4933
4934                 /*
4935                         Clear references to playing sounds
4936                 */
4937                 for(std::map<s32, ServerPlayingSound>::iterator
4938                                 i = m_playing_sounds.begin();
4939                                 i != m_playing_sounds.end();)
4940                 {
4941                         ServerPlayingSound &psound = i->second;
4942                         psound.clients.erase(c.peer_id);
4943                         if(psound.clients.size() == 0)
4944                                 m_playing_sounds.erase(i++);
4945                         else
4946                                 i++;
4947                 }
4948
4949                 Player *player = m_env->getPlayer(c.peer_id);
4950
4951                 // Collect information about leaving in chat
4952                 std::wstring message;
4953                 {
4954                         if(player != NULL)
4955                         {
4956                                 std::wstring name = narrow_to_wide(player->getName());
4957                                 message += L"*** ";
4958                                 message += name;
4959                                 message += L" left the game.";
4960                                 if(c.timeout)
4961                                         message += L" (timed out)";
4962                         }
4963                 }
4964
4965                 /* Run scripts and remove from environment */
4966                 {
4967                         if(player != NULL)
4968                         {
4969                                 PlayerSAO *playersao = player->getPlayerSAO();
4970                                 assert(playersao);
4971
4972                                 scriptapi_on_leaveplayer(m_lua, playersao);
4973
4974                                 playersao->disconnected();
4975                         }
4976                 }
4977
4978                 /*
4979                         Print out action
4980                 */
4981                 {
4982                         if(player != NULL)
4983                         {
4984                                 std::ostringstream os(std::ios_base::binary);
4985                                 for(core::map<u16, RemoteClient*>::Iterator
4986                                         i = m_clients.getIterator();
4987                                         i.atEnd() == false; i++)
4988                                 {
4989                                         RemoteClient *client = i.getNode()->getValue();
4990                                         assert(client->peer_id == i.getNode()->getKey());
4991                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4992                                                 continue;
4993                                         // Get player
4994                                         Player *player = m_env->getPlayer(client->peer_id);
4995                                         if(!player)
4996                                                 continue;
4997                                         // Get name of player
4998                                         os<<player->getName()<<" ";
4999                                 }
5000
5001                                 actionstream<<player->getName()<<" "
5002                                                 <<(c.timeout?"times out.":"leaves game.")
5003                                                 <<" List of players: "
5004                                                 <<os.str()<<std::endl;
5005                         }
5006                 }
5007
5008                 // Delete client
5009                 delete m_clients[c.peer_id];
5010                 m_clients.remove(c.peer_id);
5011
5012                 // Send player info to all remaining clients
5013                 //SendPlayerInfos();
5014
5015                 // Send leave chat message to all remaining clients
5016                 if(message.length() != 0)
5017                         BroadcastChatMessage(message);
5018
5019         } // PEER_REMOVED
5020         else
5021         {
5022                 assert(0);
5023         }
5024 }
5025
5026 void Server::handlePeerChanges()
5027 {
5028         while(m_peer_change_queue.size() > 0)
5029         {
5030                 PeerChange c = m_peer_change_queue.pop_front();
5031
5032                 verbosestream<<"Server: Handling peer change: "
5033                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
5034                                 <<std::endl;
5035
5036                 handlePeerChange(c);
5037         }
5038 }
5039
5040 void dedicated_server_loop(Server &server, bool &kill)
5041 {
5042         DSTACK(__FUNCTION_NAME);
5043
5044         verbosestream<<"dedicated_server_loop()"<<std::endl;
5045
5046         IntervalLimiter m_profiler_interval;
5047
5048         for(;;)
5049         {
5050                 float steplen = g_settings->getFloat("dedicated_server_step");
5051                 // This is kind of a hack but can be done like this
5052                 // because server.step() is very light
5053                 {
5054                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
5055                         sleep_ms((int)(steplen*1000.0));
5056                 }
5057                 server.step(steplen);
5058
5059                 if(server.getShutdownRequested() || kill)
5060                 {
5061                         infostream<<"Dedicated server quitting"<<std::endl;
5062                         break;
5063                 }
5064
5065                 /*
5066                         Profiler
5067                 */
5068                 float profiler_print_interval =
5069                                 g_settings->getFloat("profiler_print_interval");
5070                 if(profiler_print_interval != 0)
5071                 {
5072                         if(m_profiler_interval.step(steplen, profiler_print_interval))
5073                         {
5074                                 infostream<<"Profiler:"<<std::endl;
5075                                 g_profiler->print(infostream);
5076                                 g_profiler->clear();
5077                         }
5078                 }
5079         }
5080 }
5081
5082