src/server.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "server.h"
  21 #include <iostream>
  22 #include <queue>
  23 #include "clientserver.h"
  24 #include "map.h"
  25 #include "jmutexautolock.h"
  26 #include "main.h"
  27 #include "constants.h"
  28 #include "voxel.h"
  29 #include "config.h"
  30 #include "filesys.h"
  31 #include "mapblock.h"
  32 #include "serverobject.h"
  33 #include "settings.h"
  34 #include "profiler.h"
  35 #include "log.h"
  36 #include "script.h"
  37 #include "scriptapi.h"
  38 #include "nodedef.h"
  39 #include "itemdef.h"
  40 #include "craftdef.h"
  41 #include "mapgen.h"
  42 #include "content_mapnode.h"
  43 #include "content_nodemeta.h"
  44 #include "content_abm.h"
  45 #include "content_sao.h"
  46 #include "mods.h"
  47 #include "sha1.h"
  48 #include "base64.h"
  49 #include "tool.h"
  50 #include "sound.h" // dummySoundManager
  51 #include "event_manager.h"
  52 #include "hex.h"
  53 #include "util/string.h"
  54 #include "util/pointedthing.h"
  55 #include "util/mathconstants.h"
  56 #include "rollback.h"
  57 #include "util/serialize.h"
  58
  59 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  60
  61 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
  62
  63 class MapEditEventIgnorer
  64 {
  65 public:
  66         MapEditEventIgnorer(bool *flag):
  67                 m_flag(flag)
  68         {
  69                 if(*m_flag == false)
  70                         *m_flag = true;
  71                 else
  72                         m_flag = NULL;
  73         }
  74
  75         ~MapEditEventIgnorer()
  76         {
  77                 if(m_flag)
  78                 {
  79                         assert(*m_flag);
  80                         *m_flag = false;
  81                 }
  82         }
  83
  84 private:
  85         bool *m_flag;
  86 };
  87
  88 class MapEditEventAreaIgnorer
  89 {
  90 public:
  91         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
  92                 m_ignorevariable(ignorevariable)
  93         {
  94                 if(m_ignorevariable->getVolume() == 0)
  95                         *m_ignorevariable = a;
  96                 else
  97                         m_ignorevariable = NULL;
  98         }
  99
 100         ~MapEditEventAreaIgnorer()
 101         {
 102                 if(m_ignorevariable)
 103                 {
 104                         assert(m_ignorevariable->getVolume() != 0);
 105                         *m_ignorevariable = VoxelArea();
 106                 }
 107         }
 108
 109 private:
 110         VoxelArea *m_ignorevariable;
 111 };
 112
 113 void * ServerThread::Thread()
 114 {
 115         ThreadStarted();
 116
 117         log_register_thread("ServerThread");
 118
 119         DSTACK(__FUNCTION_NAME);
 120
 121         BEGIN_DEBUG_EXCEPTION_HANDLER
 122
 123         while(getRun())
 124         {
 125                 try{
 126                         //TimeTaker timer("AsyncRunStep() + Receive()");
 127
 128                         {
 129                                 //TimeTaker timer("AsyncRunStep()");
 130                                 m_server->AsyncRunStep();
 131                         }
 132
 133                         //infostream<<"Running m_server->Receive()"<<std::endl;
 134                         m_server->Receive();
 135                 }
 136                 catch(con::NoIncomingDataException &e)
 137                 {
 138                 }
 139                 catch(con::PeerNotFoundException &e)
 140                 {
 141                         infostream<<"Server: PeerNotFoundException"<<std::endl;
 142                 }
 143                 catch(con::ConnectionBindFailed &e)
 144                 {
 145                         m_server->setAsyncFatalError(e.what());
 146                 }
 147                 catch(LuaError &e)
 148                 {
 149                         m_server->setAsyncFatalError(e.what());
 150                 }
 151         }
 152
 153         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 154
 155         return NULL;
 156 }
 157
 158 void * EmergeThread::Thread()
 159 {
 160         ThreadStarted();
 161
 162         log_register_thread("EmergeThread");
 163
 164         DSTACK(__FUNCTION_NAME);
 165
 166         BEGIN_DEBUG_EXCEPTION_HANDLER
 167
 168         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 169
 170         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 171
 172         /*
 173                 Get block info from queue, emerge them and send them
 174                 to clients.
 175
 176                 After queue is empty, exit.
 177         */
 178         while(getRun())
 179         try{
 180                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
 181                 if(qptr == NULL)
 182                         break;
 183
 184                 SharedPtr<QueuedBlockEmerge> q(qptr);
 185
 186                 v3s16 &p = q->pos;
 187                 v2s16 p2d(p.X,p.Z);
 188
 189                 last_tried_pos = p;
 190
 191                 /*
 192                         Do not generate over-limit
 193                 */
 194                 if(blockpos_over_limit(p))
 195                         continue;
 196
 197                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
 198
 199                 //TimeTaker timer("block emerge");
 200
 201                 /*
 202                         Try to emerge it from somewhere.
 203
 204                         If it is only wanted as optional, only loading from disk
 205                         will be allowed.
 206                 */
 207
 208                 /*
 209                         Check if any peer wants it as non-optional. In that case it
 210                         will be generated.
 211
 212                         Also decrement the emerge queue count in clients.
 213                 */
 214
 215                 bool only_from_disk = true;
 216
 217                 {
 218                         core::map<u16, u8>::Iterator i;
 219                         for(i=q->peer_ids.getIterator(); i.atEnd()==false; i++)
 220                         {
 221                                 //u16 peer_id = i.getNode()->getKey();
 222
 223                                 // Check flags
 224                                 u8 flags = i.getNode()->getValue();
 225                                 if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
 226                                         only_from_disk = false;
 227
 228                         }
 229                 }
 230
 231                 if(enable_mapgen_debug_info)
 232                         infostream<<"EmergeThread: p="
 233                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
 234                                         <<"only_from_disk="<<only_from_disk<<std::endl;
 235
 236                 ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
 237
 238                 MapBlock *block = NULL;
 239                 bool got_block = true;
 240                 core::map<v3s16, MapBlock*> modified_blocks;
 241
 242                 /*
 243                         Try to fetch block from memory or disk.
 244                         If not found and asked to generate, initialize generator.
 245                 */
 246
 247                 bool started_generate = false;
 248                 mapgen::BlockMakeData data;
 249
 250                 {
 251                         JMutexAutoLock envlock(m_server->m_env_mutex);
 252
 253                         // Load sector if it isn't loaded
 254                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
 255                                 map.loadSectorMeta(p2d);
 256
 257                         // Attempt to load block
 258                         block = map.getBlockNoCreateNoEx(p);
 259                         if(!block || block->isDummy() || !block->isGenerated())
 260                         {
 261                                 if(enable_mapgen_debug_info)
 262                                         infostream<<"EmergeThread: not in memory, "
 263                                                         <<"attempting to load from disk"<<std::endl;
 264
 265                                 block = map.loadBlock(p);
 266                         }
 267
 268                         // If could not load and allowed to generate, start generation
 269                         // inside this same envlock
 270                         if(only_from_disk == false &&
 271                                         (block == NULL || block->isGenerated() == false)){
 272                                 if(enable_mapgen_debug_info)
 273                                         infostream<<"EmergeThread: generating"<<std::endl;
 274                                 started_generate = true;
 275
 276                                 map.initBlockMake(&data, p);
 277                         }
 278                 }
 279
 280                 /*
 281                         If generator was initialized, generate now when envlock is free.
 282                 */
 283                 if(started_generate)
 284                 {
 285                         {
 286                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
 287                                                 SPT_AVG);
 288                                 TimeTaker t("mapgen::make_block()");
 289
 290                                 mapgen::make_block(&data);
 291
 292                                 if(enable_mapgen_debug_info == false)
 293                                         t.stop(true); // Hide output
 294                         }
 295
 296                         do{ // enable break
 297                                 // Lock environment again to access the map
 298                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 299
 300                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 301                                                 "mapgen::make_block (envlock)", SPT_AVG);
 302
 303                                 // Blit data back on map, update lighting, add mobs and
 304                                 // whatever this does
 305                                 map.finishBlockMake(&data, modified_blocks);
 306
 307                                 // Get central block
 308                                 block = map.getBlockNoCreateNoEx(p);
 309
 310                                 // If block doesn't exist, don't try doing anything with it
 311                                 // This happens if the block is not in generation boundaries
 312                                 if(!block)
 313                                         break;
 314
 315                                 /*
 316                                         Do some post-generate stuff
 317                                 */
 318
 319                                 v3s16 minp = data.blockpos_min*MAP_BLOCKSIZE;
 320                                 v3s16 maxp = data.blockpos_max*MAP_BLOCKSIZE +
 321                                                 v3s16(1,1,1)*(MAP_BLOCKSIZE-1);
 322
 323                                 /*
 324                                         Ignore map edit events, they will not need to be
 325                                         sent to anybody because the block hasn't been sent
 326                                         to anybody
 327                                 */
 328                                 //MapEditEventIgnorer ign(&m_server->m_ignore_map_edit_events);
 329                                 MapEditEventAreaIgnorer ign(
 330                                                 &m_server->m_ignore_map_edit_events_area,
 331                                                 VoxelArea(minp, maxp));
 332                                 {
 333                                         TimeTaker timer("on_generated");
 334                                         scriptapi_environment_on_generated(m_server->m_lua,
 335                                                         minp, maxp, mapgen::get_blockseed(data.seed, minp));
 336                                         /*int t = timer.stop(true);
 337                                         dstream<<"on_generated took "<<t<<"ms"<<std::endl;*/
 338                                 }
 339
 340                                 if(enable_mapgen_debug_info)
 341                                         infostream<<"EmergeThread: ended up with: "
 342                                                         <<analyze_block(block)<<std::endl;
 343
 344                                 // Activate objects and stuff
 345                                 m_server->m_env->activateBlock(block, 0);
 346                         }while(false);
 347                 }
 348
 349                 if(block == NULL)
 350                         got_block = false;
 351
 352                 /*
 353                         Set sent status of modified blocks on clients
 354                 */
 355
 356                 // NOTE: Server's clients are also behind the connection mutex
 357                 JMutexAutoLock lock(m_server->m_con_mutex);
 358
 359                 /*
 360                         Add the originally fetched block to the modified list
 361                 */
 362                 if(got_block)
 363                 {
 364                         modified_blocks.insert(p, block);
 365                 }
 366
 367                 /*
 368                         Set the modified blocks unsent for all the clients
 369                 */
 370
 371                 for(core::map<u16, RemoteClient*>::Iterator
 372                                 i = m_server->m_clients.getIterator();
 373                                 i.atEnd() == false; i++)
 374                 {
 375                         RemoteClient *client = i.getNode()->getValue();
 376
 377                         if(modified_blocks.size() > 0)
 378                         {
 379                                 // Remove block from sent history
 380                                 client->SetBlocksNotSent(modified_blocks);
 381                         }
 382                 }
 383         }
 384         catch(VersionMismatchException &e)
 385         {
 386                 std::ostringstream err;
 387                 err<<"World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 388                 err<<"----"<<std::endl;
 389                 err<<"\""<<e.what()<<"\""<<std::endl;
 390                 err<<"See debug.txt."<<std::endl;
 391                 err<<"World probably saved by a newer version of Minetest."<<std::endl;
 392                 m_server->setAsyncFatalError(err.str());
 393         }
 394         catch(SerializationError &e)
 395         {
 396                 std::ostringstream err;
 397                 err<<"Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 398                 err<<"----"<<std::endl;
 399                 err<<"\""<<e.what()<<"\""<<std::endl;
 400                 err<<"See debug.txt."<<std::endl;
 401                 err<<"You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 402                 m_server->setAsyncFatalError(err.str());
 403         }
 404
 405         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 406
 407         log_deregister_thread();
 408
 409         return NULL;
 410 }
 411
 412 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
 413 {
 414         if(pos_exists) *pos_exists = false;
 415         switch(type){
 416         case SSP_LOCAL:
 417                 return v3f(0,0,0);
 418         case SSP_POSITIONAL:
 419                 if(pos_exists) *pos_exists = true;
 420                 return pos;
 421         case SSP_OBJECT: {
 422                 if(object == 0)
 423                         return v3f(0,0,0);
 424                 ServerActiveObject *sao = env->getActiveObject(object);
 425                 if(!sao)
 426                         return v3f(0,0,0);
 427                 if(pos_exists) *pos_exists = true;
 428                 return sao->getBasePosition(); }
 429         }
 430         return v3f(0,0,0);
 431 }
 432
 433 void RemoteClient::GetNextBlocks(Server *server, float dtime,
 434                 core::array<PrioritySortedBlockTransfer> &dest)
 435 {
 436         DSTACK(__FUNCTION_NAME);
 437
 438         /*u32 timer_result;
 439         TimeTaker timer("RemoteClient::GetNextBlocks", &timer_result);*/
 440
 441         // Increment timers
 442         m_nothing_to_send_pause_timer -= dtime;
 443         m_nearest_unsent_reset_timer += dtime;
 444
 445         if(m_nothing_to_send_pause_timer >= 0)
 446                 return;
 447
 448         Player *player = server->m_env->getPlayer(peer_id);
 449         // This can happen sometimes; clients and players are not in perfect sync.
 450         if(player == NULL)
 451                 return;
 452
 453         // Won't send anything if already sending
 454         if(m_blocks_sending.size() >= g_settings->getU16
 455                         ("max_simultaneous_block_sends_per_client"))
 456         {
 457                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 458                 return;
 459         }
 460
 461         //TimeTaker timer("RemoteClient::GetNextBlocks");
 462
 463         v3f playerpos = player->getPosition();
 464         v3f playerspeed = player->getSpeed();
 465         v3f playerspeeddir(0,0,0);
 466         if(playerspeed.getLength() > 1.0*BS)
 467                 playerspeeddir = playerspeed / playerspeed.getLength();
 468         // Predict to next block
 469         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 470
 471         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 472
 473         v3s16 center = getNodeBlockPos(center_nodepos);
 474
 475         // Camera position and direction
 476         v3f camera_pos = player->getEyePosition();
 477         v3f camera_dir = v3f(0,0,1);
 478         camera_dir.rotateYZBy(player->getPitch());
 479         camera_dir.rotateXZBy(player->getYaw());
 480
 481         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 482                         <<camera_dir.Z<<")"<<std::endl;*/
 483
 484         /*
 485                 Get the starting value of the block finder radius.
 486         */
 487
 488         if(m_last_center != center)
 489         {
 490                 m_nearest_unsent_d = 0;
 491                 m_last_center = center;
 492         }
 493
 494         /*infostream<<"m_nearest_unsent_reset_timer="
 495                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 496
 497         // Reset periodically to workaround for some bugs or stuff
 498         if(m_nearest_unsent_reset_timer > 20.0)
 499         {
 500                 m_nearest_unsent_reset_timer = 0;
 501                 m_nearest_unsent_d = 0;
 502                 //infostream<<"Resetting m_nearest_unsent_d for "
 503                 //              <<server->getPlayerName(peer_id)<<std::endl;
 504         }
 505
 506         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 507         s16 d_start = m_nearest_unsent_d;
 508
 509         //infostream<<"d_start="<<d_start<<std::endl;
 510
 511         u16 max_simul_sends_setting = g_settings->getU16
 512                         ("max_simultaneous_block_sends_per_client");
 513         u16 max_simul_sends_usually = max_simul_sends_setting;
 514
 515         /*
 516                 Check the time from last addNode/removeNode.
 517
 518                 Decrease send rate if player is building stuff.
 519         */
 520         m_time_from_building += dtime;
 521         if(m_time_from_building < g_settings->getFloat(
 522                                 "full_block_send_enable_min_time_from_building"))
 523         {
 524                 max_simul_sends_usually
 525                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 526         }
 527
 528         /*
 529                 Number of blocks sending + number of blocks selected for sending
 530         */
 531         u32 num_blocks_selected = m_blocks_sending.size();
 532
 533         /*
 534                 next time d will be continued from the d from which the nearest
 535                 unsent block was found this time.
 536
 537                 This is because not necessarily any of the blocks found this
 538                 time are actually sent.
 539         */
 540         s32 new_nearest_unsent_d = -1;
 541
 542         s16 d_max = g_settings->getS16("max_block_send_distance");
 543         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 544
 545         // Don't loop very much at a time
 546         s16 max_d_increment_at_time = 2;
 547         if(d_max > d_start + max_d_increment_at_time)
 548                 d_max = d_start + max_d_increment_at_time;
 549         /*if(d_max_gen > d_start+2)
 550                 d_max_gen = d_start+2;*/
 551
 552         //infostream<<"Starting from "<<d_start<<std::endl;
 553
 554         s32 nearest_emerged_d = -1;
 555         s32 nearest_emergefull_d = -1;
 556         s32 nearest_sent_d = -1;
 557         bool queue_is_full = false;
 558
 559         s16 d;
 560         for(d = d_start; d <= d_max; d++)
 561         {
 562                 /*errorstream<<"checking d="<<d<<" for "
 563                                 <<server->getPlayerName(peer_id)<<std::endl;*/
 564                 //infostream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
 565
 566                 /*
 567                         If m_nearest_unsent_d was changed by the EmergeThread
 568                         (it can change it to 0 through SetBlockNotSent),
 569                         update our d to it.
 570                         Else update m_nearest_unsent_d
 571                 */
 572                 /*if(m_nearest_unsent_d != last_nearest_unsent_d)
 573                 {
 574                         d = m_nearest_unsent_d;
 575                         last_nearest_unsent_d = m_nearest_unsent_d;
 576                 }*/
 577
 578                 /*
 579                         Get the border/face dot coordinates of a "d-radiused"
 580                         box
 581                 */
 582                 core::list<v3s16> list;
 583                 getFacePositions(list, d);
 584
 585                 core::list<v3s16>::Iterator li;
 586                 for(li=list.begin(); li!=list.end(); li++)
 587                 {
 588                         v3s16 p = *li + center;
 589
 590                         /*
 591                                 Send throttling
 592                                 - Don't allow too many simultaneous transfers
 593                                 - EXCEPT when the blocks are very close
 594
 595                                 Also, don't send blocks that are already flying.
 596                         */
 597
 598                         // Start with the usual maximum
 599                         u16 max_simul_dynamic = max_simul_sends_usually;
 600
 601                         // If block is very close, allow full maximum
 602                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 603                                 max_simul_dynamic = max_simul_sends_setting;
 604
 605                         // Don't select too many blocks for sending
 606                         if(num_blocks_selected >= max_simul_dynamic)
 607                         {
 608                                 queue_is_full = true;
 609                                 goto queue_full_break;
 610                         }
 611
 612                         // Don't send blocks that are currently being transferred
 613                         if(m_blocks_sending.find(p) != NULL)
 614                                 continue;
 615
 616                         /*
 617                                 Do not go over-limit
 618                         */
 619                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 620                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 621                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 622                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 623                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 624                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
 625                                 continue;
 626
 627                         // If this is true, inexistent block will be made from scratch
 628                         bool generate = d <= d_max_gen;
 629
 630                         {
 631                                 /*// Limit the generating area vertically to 2/3
 632                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 633                                         generate = false;*/
 634
 635                                 // Limit the send area vertically to 1/2
 636                                 if(abs(p.Y - center.Y) > d_max / 2)
 637                                         continue;
 638                         }
 639
 640 #if 0
 641                         /*
 642                                 If block is far away, don't generate it unless it is
 643                                 near ground level.
 644                         */
 645                         if(d >= 4)
 646                         {
 647         #if 1
 648                                 // Block center y in nodes
 649                                 f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
 650                                 // Don't generate if it's very high or very low
 651                                 if(y < -64 || y > 64)
 652                                         generate = false;
 653         #endif
 654         #if 0
 655                                 v2s16 p2d_nodes_center(
 656                                         MAP_BLOCKSIZE*p.X,
 657                                         MAP_BLOCKSIZE*p.Z);
 658
 659                                 // Get ground height in nodes
 660                                 s16 gh = server->m_env->getServerMap().findGroundLevel(
 661                                                 p2d_nodes_center);
 662
 663                                 // If differs a lot, don't generate
 664                                 if(fabs(gh - y) > MAP_BLOCKSIZE*2)
 665                                         generate = false;
 666                                         // Actually, don't even send it
 667                                         //continue;
 668         #endif
 669                         }
 670 #endif
 671
 672                         //infostream<<"d="<<d<<std::endl;
 673 #if 1
 674                         /*
 675                                 Don't generate or send if not in sight
 676                                 FIXME This only works if the client uses a small enough
 677                                 FOV setting. The default of 72 degrees is fine.
 678                         */
 679
 680                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 681                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 682                         {
 683                                 continue;
 684                         }
 685 #endif
 686                         /*
 687                                 Don't send already sent blocks
 688                         */
 689                         {
 690                                 if(m_blocks_sent.find(p) != NULL)
 691                                 {
 692                                         continue;
 693                                 }
 694                         }
 695
 696                         /*
 697                                 Check if map has this block
 698                         */
 699                         MapBlock *block = server->m_env->getMap().getBlockNoCreateNoEx(p);
 700
 701                         bool surely_not_found_on_disk = false;
 702                         bool block_is_invalid = false;
 703                         if(block != NULL)
 704                         {
 705                                 // Reset usage timer, this block will be of use in the future.
 706                                 block->resetUsageTimer();
 707
 708                                 // Block is dummy if data doesn't exist.
 709                                 // It means it has been not found from disk and not generated
 710                                 if(block->isDummy())
 711                                 {
 712                                         surely_not_found_on_disk = true;
 713                                 }
 714
 715                                 // Block is valid if lighting is up-to-date and data exists
 716                                 if(block->isValid() == false)
 717                                 {
 718                                         block_is_invalid = true;
 719                                 }
 720
 721                                 /*if(block->isFullyGenerated() == false)
 722                                 {
 723                                         block_is_invalid = true;
 724                                 }*/
 725
 726 #if 0
 727                                 v2s16 p2d(p.X, p.Z);
 728                                 ServerMap *map = (ServerMap*)(&server->m_env->getMap());
 729                                 v2s16 chunkpos = map->sector_to_chunk(p2d);
 730                                 if(map->chunkNonVolatile(chunkpos) == false)
 731                                         block_is_invalid = true;
 732 #endif
 733                                 if(block->isGenerated() == false)
 734                                         block_is_invalid = true;
 735 #if 1
 736                                 /*
 737                                         If block is not close, don't send it unless it is near
 738                                         ground level.
 739
 740                                         Block is near ground level if night-time mesh
 741                                         differs from day-time mesh.
 742                                 */
 743                                 if(d >= 4)
 744                                 {
 745                                         if(block->getDayNightDiff() == false)
 746                                                 continue;
 747                                 }
 748 #endif
 749                         }
 750
 751                         /*
 752                                 If block has been marked to not exist on disk (dummy)
 753                                 and generating new ones is not wanted, skip block.
 754                         */
 755                         if(generate == false && surely_not_found_on_disk == true)
 756                         {
 757                                 // get next one.
 758                                 continue;
 759                         }
 760
 761                         /*
 762                                 Add inexistent block to emerge queue.
 763                         */
 764                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 765                         {
 766                                 //TODO: Get value from somewhere
 767                                 // Allow only one block in emerge queue
 768                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
 769                                 // Allow two blocks in queue per client
 770                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
 771                                 u32 max_emerge = 5;
 772                                 // Make it more responsive when needing to generate stuff
 773                                 if(surely_not_found_on_disk)
 774                                         max_emerge = 1;
 775                                 if(server->m_emerge_queue.peerItemCount(peer_id) < max_emerge)
 776                                 {
 777                                         //infostream<<"Adding block to emerge queue"<<std::endl;
 778
 779                                         // Add it to the emerge queue and trigger the thread
 780
 781                                         u8 flags = 0;
 782                                         if(generate == false)
 783                                                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
 784
 785                                         server->m_emerge_queue.addBlock(peer_id, p, flags);
 786                                         server->m_emergethread.trigger();
 787
 788                                         if(nearest_emerged_d == -1)
 789                                                 nearest_emerged_d = d;
 790                                 } else {
 791                                         if(nearest_emergefull_d == -1)
 792                                                 nearest_emergefull_d = d;
 793                                 }
 794
 795                                 // get next one.
 796                                 continue;
 797                         }
 798
 799                         if(nearest_sent_d == -1)
 800                                 nearest_sent_d = d;
 801
 802                         /*
 803                                 Add block to send queue
 804                         */
 805
 806                         /*errorstream<<"sending from d="<<d<<" to "
 807                                         <<server->getPlayerName(peer_id)<<std::endl;*/
 808
 809                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 810
 811                         dest.push_back(q);
 812
 813                         num_blocks_selected += 1;
 814                 }
 815         }
 816 queue_full_break:
 817
 818         //infostream<<"Stopped at "<<d<<std::endl;
 819
 820         // If nothing was found for sending and nothing was queued for
 821         // emerging, continue next time browsing from here
 822         if(nearest_emerged_d != -1){
 823                 new_nearest_unsent_d = nearest_emerged_d;
 824         } else if(nearest_emergefull_d != -1){
 825                 new_nearest_unsent_d = nearest_emergefull_d;
 826         } else {
 827                 if(d > g_settings->getS16("max_block_send_distance")){
 828                         new_nearest_unsent_d = 0;
 829                         m_nothing_to_send_pause_timer = 2.0;
 830                         /*infostream<<"GetNextBlocks(): d wrapped around for "
 831                                         <<server->getPlayerName(peer_id)
 832                                         <<"; setting to 0 and pausing"<<std::endl;*/
 833                 } else {
 834                         if(nearest_sent_d != -1)
 835                                 new_nearest_unsent_d = nearest_sent_d;
 836                         else
 837                                 new_nearest_unsent_d = d;
 838                 }
 839         }
 840
 841         if(new_nearest_unsent_d != -1)
 842                 m_nearest_unsent_d = new_nearest_unsent_d;
 843
 844         /*timer_result = timer.stop(true);
 845         if(timer_result != 0)
 846                 infostream<<"GetNextBlocks timeout: "<<timer_result<<" (!=0)"<<std::endl;*/
 847 }
 848
 849 void RemoteClient::GotBlock(v3s16 p)
 850 {
 851         if(m_blocks_sending.find(p) != NULL)
 852                 m_blocks_sending.remove(p);
 853         else
 854         {
 855                 /*infostream<<"RemoteClient::GotBlock(): Didn't find in"
 856                                 " m_blocks_sending"<<std::endl;*/
 857                 m_excess_gotblocks++;
 858         }
 859         m_blocks_sent.insert(p, true);
 860 }
 861
 862 void RemoteClient::SentBlock(v3s16 p)
 863 {
 864         if(m_blocks_sending.find(p) == NULL)
 865                 m_blocks_sending.insert(p, 0.0);
 866         else
 867                 infostream<<"RemoteClient::SentBlock(): Sent block"
 868                                 " already in m_blocks_sending"<<std::endl;
 869 }
 870
 871 void RemoteClient::SetBlockNotSent(v3s16 p)
 872 {
 873         m_nearest_unsent_d = 0;
 874
 875         if(m_blocks_sending.find(p) != NULL)
 876                 m_blocks_sending.remove(p);
 877         if(m_blocks_sent.find(p) != NULL)
 878                 m_blocks_sent.remove(p);
 879 }
 880
 881 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
 882 {
 883         m_nearest_unsent_d = 0;
 884
 885         for(core::map<v3s16, MapBlock*>::Iterator
 886                         i = blocks.getIterator();
 887                         i.atEnd()==false; i++)
 888         {
 889                 v3s16 p = i.getNode()->getKey();
 890
 891                 if(m_blocks_sending.find(p) != NULL)
 892                         m_blocks_sending.remove(p);
 893                 if(m_blocks_sent.find(p) != NULL)
 894                         m_blocks_sent.remove(p);
 895         }
 896 }
 897
 898 /*
 899         PlayerInfo
 900 */
 901
 902 PlayerInfo::PlayerInfo()
 903 {
 904         name[0] = 0;
 905         avg_rtt = 0;
 906 }
 907
 908 void PlayerInfo::PrintLine(std::ostream *s)
 909 {
 910         (*s)<<id<<": ";
 911         (*s)<<"\""<<name<<"\" ("
 912                         <<(position.X/10)<<","<<(position.Y/10)
 913                         <<","<<(position.Z/10)<<") ";
 914         address.print(s);
 915         (*s)<<" avg_rtt="<<avg_rtt;
 916         (*s)<<std::endl;
 917 }
 918
 919 /*
 920         Server
 921 */
 922
 923 Server::Server(
 924                 const std::string &path_world,
 925                 const std::string &path_config,
 926                 const SubgameSpec &gamespec,
 927                 bool simple_singleplayer_mode
 928         ):
 929         m_path_world(path_world),
 930         m_path_config(path_config),
 931         m_gamespec(gamespec),
 932         m_simple_singleplayer_mode(simple_singleplayer_mode),
 933         m_async_fatal_error(""),
 934         m_env(NULL),
 935         m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
 936         m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
 937         m_rollback(NULL),
 938         m_rollback_sink_enabled(true),
 939         m_enable_rollback_recording(false),
 940         m_lua(NULL),
 941         m_itemdef(createItemDefManager()),
 942         m_nodedef(createNodeDefManager()),
 943         m_craftdef(createCraftDefManager()),
 944         m_event(new EventManager()),
 945         m_thread(this),
 946         m_emergethread(this),
 947         m_time_of_day_send_timer(0),
 948         m_uptime(0),
 949         m_shutdown_requested(false),
 950         m_ignore_map_edit_events(false),
 951         m_ignore_map_edit_events_peer_id(0)
 952 {
 953         m_liquid_transform_timer = 0.0;
 954         m_print_info_timer = 0.0;
 955         m_objectdata_timer = 0.0;
 956         m_emergethread_trigger_timer = 0.0;
 957         m_savemap_timer = 0.0;
 958
 959         m_env_mutex.Init();
 960         m_con_mutex.Init();
 961         m_step_dtime_mutex.Init();
 962         m_step_dtime = 0.0;
 963
 964         if(path_world == "")
 965                 throw ServerError("Supplied empty world path");
 966
 967         if(!gamespec.isValid())
 968                 throw ServerError("Supplied invalid gamespec");
 969
 970         infostream<<"Server created for gameid \""<<m_gamespec.id<<"\"";
 971         if(m_simple_singleplayer_mode)
 972                 infostream<<" in simple singleplayer mode"<<std::endl;
 973         else
 974                 infostream<<std::endl;
 975         infostream<<"- world:  "<<m_path_world<<std::endl;
 976         infostream<<"- config: "<<m_path_config<<std::endl;
 977         infostream<<"- game:   "<<m_gamespec.path<<std::endl;
 978
 979         // Create rollback manager
 980         std::string rollback_path = m_path_world+DIR_DELIM+"rollback.txt";
 981         m_rollback = createRollbackManager(rollback_path, this);
 982
 983         // Add world mod search path
 984         m_modspaths.push_front(m_path_world + DIR_DELIM + "worldmods");
 985         // Add addon mod search path
 986         for(std::set<std::string>::const_iterator i = m_gamespec.mods_paths.begin();
 987                         i != m_gamespec.mods_paths.end(); i++)
 988                 m_modspaths.push_front((*i));
 989
 990         // Print out mod search paths
 991         for(core::list<std::string>::Iterator i = m_modspaths.begin();
 992                         i != m_modspaths.end(); i++){
 993                 std::string modspath = *i;
 994                 infostream<<"- mods:   "<<modspath<<std::endl;
 995         }
 996
 997         // Path to builtin.lua
 998         std::string builtinpath = getBuiltinLuaPath() + DIR_DELIM + "builtin.lua";
 999
1000         // Create world if it doesn't exist
1001         if(!initializeWorld(m_path_world, m_gamespec.id))
1002                 throw ServerError("Failed to initialize world");
1003
1004         // Lock environment
1005         JMutexAutoLock envlock(m_env_mutex);
1006         JMutexAutoLock conlock(m_con_mutex);
1007
1008         // Initialize scripting
1009
1010         infostream<<"Server: Initializing Lua"<<std::endl;
1011         m_lua = script_init();
1012         assert(m_lua);
1013         // Export API
1014         scriptapi_export(m_lua, this);
1015         // Load and run builtin.lua
1016         infostream<<"Server: Loading builtin.lua [\""
1017                         <<builtinpath<<"\"]"<<std::endl;
1018         bool success = scriptapi_loadmod(m_lua, builtinpath, "__builtin");
1019         if(!success){
1020                 errorstream<<"Server: Failed to load and run "
1021                                 <<builtinpath<<std::endl;
1022                 throw ModError("Failed to load and run "+builtinpath);
1023         }
1024         // Find mods in mod search paths
1025         m_mods = getMods(m_modspaths);
1026         // Print 'em
1027         infostream<<"Server: Loading mods: ";
1028         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1029                         i != m_mods.end(); i++){
1030                 const ModSpec &mod = *i;
1031                 infostream<<mod.name<<" ";
1032         }
1033         infostream<<std::endl;
1034         // Load and run "mod" scripts
1035         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1036                         i != m_mods.end(); i++){
1037                 const ModSpec &mod = *i;
1038                 std::string scriptpath = mod.path + DIR_DELIM + "init.lua";
1039                 infostream<<"  ["<<padStringRight(mod.name, 12)<<"] [\""
1040                                 <<scriptpath<<"\"]"<<std::endl;
1041                 bool success = scriptapi_loadmod(m_lua, scriptpath, mod.name);
1042                 if(!success){
1043                         errorstream<<"Server: Failed to load and run "
1044                                         <<scriptpath<<std::endl;
1045                         throw ModError("Failed to load and run "+scriptpath);
1046                 }
1047         }
1048
1049         // Read Textures and calculate sha1 sums
1050         fillMediaCache();
1051
1052         // Apply item aliases in the node definition manager
1053         m_nodedef->updateAliases(m_itemdef);
1054
1055         // Initialize Environment
1056
1057         m_env = new ServerEnvironment(new ServerMap(path_world, this), m_lua,
1058                         this, this);
1059
1060         // Give environment reference to scripting api
1061         scriptapi_add_environment(m_lua, m_env);
1062
1063         // Register us to receive map edit events
1064         m_env->getMap().addEventReceiver(this);
1065
1066         // If file exists, load environment metadata
1067         if(fs::PathExists(m_path_world+DIR_DELIM+"env_meta.txt"))
1068         {
1069                 infostream<<"Server: Loading environment metadata"<<std::endl;
1070                 m_env->loadMeta(m_path_world);
1071         }
1072
1073         // Load players
1074         infostream<<"Server: Loading players"<<std::endl;
1075         m_env->deSerializePlayers(m_path_world);
1076
1077         /*
1078                 Add some test ActiveBlockModifiers to environment
1079         */
1080         add_legacy_abms(m_env, m_nodedef);
1081 }
1082
1083 Server::~Server()
1084 {
1085         infostream<<"Server destructing"<<std::endl;
1086
1087         /*
1088                 Send shutdown message
1089         */
1090         {
1091                 JMutexAutoLock conlock(m_con_mutex);
1092
1093                 std::wstring line = L"*** Server shutting down";
1094
1095                 /*
1096                         Send the message to clients
1097                 */
1098                 for(core::map<u16, RemoteClient*>::Iterator
1099                         i = m_clients.getIterator();
1100                         i.atEnd() == false; i++)
1101                 {
1102                         // Get client and check that it is valid
1103                         RemoteClient *client = i.getNode()->getValue();
1104                         assert(client->peer_id == i.getNode()->getKey());
1105                         if(client->serialization_version == SER_FMT_VER_INVALID)
1106                                 continue;
1107
1108                         try{
1109                                 SendChatMessage(client->peer_id, line);
1110                         }
1111                         catch(con::PeerNotFoundException &e)
1112                         {}
1113                 }
1114         }
1115
1116         {
1117                 JMutexAutoLock envlock(m_env_mutex);
1118
1119                 /*
1120                         Save players
1121                 */
1122                 infostream<<"Server: Saving players"<<std::endl;
1123                 m_env->serializePlayers(m_path_world);
1124
1125                 /*
1126                         Save environment metadata
1127                 */
1128                 infostream<<"Server: Saving environment metadata"<<std::endl;
1129                 m_env->saveMeta(m_path_world);
1130         }
1131
1132         /*
1133                 Stop threads
1134         */
1135         stop();
1136
1137         /*
1138                 Delete clients
1139         */
1140         {
1141                 JMutexAutoLock clientslock(m_con_mutex);
1142
1143                 for(core::map<u16, RemoteClient*>::Iterator
1144                         i = m_clients.getIterator();
1145                         i.atEnd() == false; i++)
1146                 {
1147                         /*// Delete player
1148                         // NOTE: These are removed by env destructor
1149                         {
1150                                 u16 peer_id = i.getNode()->getKey();
1151                                 JMutexAutoLock envlock(m_env_mutex);
1152                                 m_env->removePlayer(peer_id);
1153                         }*/
1154
1155                         // Delete client
1156                         delete i.getNode()->getValue();
1157                 }
1158         }
1159
1160         // Delete things in the reverse order of creation
1161         delete m_env;
1162         delete m_rollback;
1163         delete m_event;
1164         delete m_itemdef;
1165         delete m_nodedef;
1166         delete m_craftdef;
1167
1168         // Deinitialize scripting
1169         infostream<<"Server: Deinitializing scripting"<<std::endl;
1170         script_deinit(m_lua);
1171
1172         // Delete detached inventories
1173         {
1174                 for(std::map<std::string, Inventory*>::iterator
1175                                 i = m_detached_inventories.begin();
1176                                 i != m_detached_inventories.end(); i++){
1177                         delete i->second;
1178                 }
1179         }
1180 }
1181
1182 void Server::start(unsigned short port)
1183 {
1184         DSTACK(__FUNCTION_NAME);
1185         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1186
1187         // Stop thread if already running
1188         m_thread.stop();
1189
1190         // Initialize connection
1191         m_con.SetTimeoutMs(30);
1192         m_con.Serve(port);
1193
1194         // Start thread
1195         m_thread.setRun(true);
1196         m_thread.Start();
1197
1198         // ASCII art for the win!
1199         actionstream
1200         <<"        .__               __                   __   "<<std::endl
1201         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1202         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1203         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1204         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1205         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1206         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1207         actionstream<<"Server for gameid=\""<<m_gamespec.id
1208                         <<"\" listening on port "<<port<<"."<<std::endl;
1209 }
1210
1211 void Server::stop()
1212 {
1213         DSTACK(__FUNCTION_NAME);
1214
1215         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1216
1217         // Stop threads (set run=false first so both start stopping)
1218         m_thread.setRun(false);
1219         m_emergethread.setRun(false);
1220         m_thread.stop();
1221         m_emergethread.stop();
1222
1223         infostream<<"Server: Threads stopped"<<std::endl;
1224 }
1225
1226 void Server::step(float dtime)
1227 {
1228         DSTACK(__FUNCTION_NAME);
1229         // Limit a bit
1230         if(dtime > 2.0)
1231                 dtime = 2.0;
1232         {
1233                 JMutexAutoLock lock(m_step_dtime_mutex);
1234                 m_step_dtime += dtime;
1235         }
1236         // Throw if fatal error occurred in thread
1237         std::string async_err = m_async_fatal_error.get();
1238         if(async_err != ""){
1239                 throw ServerError(async_err);
1240         }
1241 }
1242
1243 void Server::AsyncRunStep()
1244 {
1245         DSTACK(__FUNCTION_NAME);
1246
1247         g_profiler->add("Server::AsyncRunStep (num)", 1);
1248
1249         float dtime;
1250         {
1251                 JMutexAutoLock lock1(m_step_dtime_mutex);
1252                 dtime = m_step_dtime;
1253         }
1254
1255         {
1256                 // Send blocks to clients
1257                 SendBlocks(dtime);
1258         }
1259
1260         if(dtime < 0.001)
1261                 return;
1262
1263         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1264
1265         //infostream<<"Server steps "<<dtime<<std::endl;
1266         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1267
1268         {
1269                 JMutexAutoLock lock1(m_step_dtime_mutex);
1270                 m_step_dtime -= dtime;
1271         }
1272
1273         /*
1274                 Update uptime
1275         */
1276         {
1277                 m_uptime.set(m_uptime.get() + dtime);
1278         }
1279
1280         {
1281                 // Process connection's timeouts
1282                 JMutexAutoLock lock2(m_con_mutex);
1283                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1284                 m_con.RunTimeouts(dtime);
1285         }
1286
1287         {
1288                 // This has to be called so that the client list gets synced
1289                 // with the peer list of the connection
1290                 handlePeerChanges();
1291         }
1292
1293         /*
1294                 Update time of day and overall game time
1295         */
1296         {
1297                 JMutexAutoLock envlock(m_env_mutex);
1298
1299                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1300
1301                 /*
1302                         Send to clients at constant intervals
1303                 */
1304
1305                 m_time_of_day_send_timer -= dtime;
1306                 if(m_time_of_day_send_timer < 0.0)
1307                 {
1308                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1309
1310                         //JMutexAutoLock envlock(m_env_mutex);
1311                         JMutexAutoLock conlock(m_con_mutex);
1312
1313                         for(core::map<u16, RemoteClient*>::Iterator
1314                                 i = m_clients.getIterator();
1315                                 i.atEnd() == false; i++)
1316                         {
1317                                 RemoteClient *client = i.getNode()->getValue();
1318                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1319                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1320                                 // Send as reliable
1321                                 m_con.Send(client->peer_id, 0, data, true);
1322                         }
1323                 }
1324         }
1325
1326         {
1327                 JMutexAutoLock lock(m_env_mutex);
1328                 // Step environment
1329                 ScopeProfiler sp(g_profiler, "SEnv step");
1330                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1331                 m_env->step(dtime);
1332         }
1333
1334         const float map_timer_and_unload_dtime = 2.92;
1335         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1336         {
1337                 JMutexAutoLock lock(m_env_mutex);
1338                 // Run Map's timers and unload unused data
1339                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1340                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1341                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1342         }
1343
1344         /*
1345                 Do background stuff
1346         */
1347
1348         /*
1349                 Handle players
1350         */
1351         {
1352                 JMutexAutoLock lock(m_env_mutex);
1353                 JMutexAutoLock lock2(m_con_mutex);
1354
1355                 ScopeProfiler sp(g_profiler, "Server: handle players");
1356
1357                 for(core::map<u16, RemoteClient*>::Iterator
1358                         i = m_clients.getIterator();
1359                         i.atEnd() == false; i++)
1360                 {
1361                         RemoteClient *client = i.getNode()->getValue();
1362                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1363                         if(playersao == NULL)
1364                                 continue;
1365
1366                         /*
1367                                 Handle player HPs (die if hp=0)
1368                         */
1369                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1370                                 DiePlayer(client->peer_id);
1371
1372                         /*
1373                                 Send player inventories and HPs if necessary
1374                         */
1375                         if(playersao->m_moved){
1376                                 SendMovePlayer(client->peer_id);
1377                                 playersao->m_moved = false;
1378                         }
1379                         if(playersao->m_inventory_not_sent){
1380                                 UpdateCrafting(client->peer_id);
1381                                 SendInventory(client->peer_id);
1382                         }
1383                         if(playersao->m_hp_not_sent){
1384                                 SendPlayerHP(client->peer_id);
1385                         }
1386                 }
1387         }
1388
1389         /* Transform liquids */
1390         m_liquid_transform_timer += dtime;
1391         if(m_liquid_transform_timer >= 1.00)
1392         {
1393                 m_liquid_transform_timer -= 1.00;
1394
1395                 JMutexAutoLock lock(m_env_mutex);
1396
1397                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1398
1399                 core::map<v3s16, MapBlock*> modified_blocks;
1400                 m_env->getMap().transformLiquids(modified_blocks);
1401 #if 0
1402                 /*
1403                         Update lighting
1404                 */
1405                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1406                 ServerMap &map = ((ServerMap&)m_env->getMap());
1407                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1408
1409                 // Add blocks modified by lighting to modified_blocks
1410                 for(core::map<v3s16, MapBlock*>::Iterator
1411                                 i = lighting_modified_blocks.getIterator();
1412                                 i.atEnd() == false; i++)
1413                 {
1414                         MapBlock *block = i.getNode()->getValue();
1415                         modified_blocks.insert(block->getPos(), block);
1416                 }
1417 #endif
1418                 /*
1419                         Set the modified blocks unsent for all the clients
1420                 */
1421
1422                 JMutexAutoLock lock2(m_con_mutex);
1423
1424                 for(core::map<u16, RemoteClient*>::Iterator
1425                                 i = m_clients.getIterator();
1426                                 i.atEnd() == false; i++)
1427                 {
1428                         RemoteClient *client = i.getNode()->getValue();
1429
1430                         if(modified_blocks.size() > 0)
1431                         {
1432                                 // Remove block from sent history
1433                                 client->SetBlocksNotSent(modified_blocks);
1434                         }
1435                 }
1436         }
1437
1438         // Periodically print some info
1439         {
1440                 float &counter = m_print_info_timer;
1441                 counter += dtime;
1442                 if(counter >= 30.0)
1443                 {
1444                         counter = 0.0;
1445
1446                         JMutexAutoLock lock2(m_con_mutex);
1447
1448                         if(m_clients.size() != 0)
1449                                 infostream<<"Players:"<<std::endl;
1450                         for(core::map<u16, RemoteClient*>::Iterator
1451                                 i = m_clients.getIterator();
1452                                 i.atEnd() == false; i++)
1453                         {
1454                                 //u16 peer_id = i.getNode()->getKey();
1455                                 RemoteClient *client = i.getNode()->getValue();
1456                                 Player *player = m_env->getPlayer(client->peer_id);
1457                                 if(player==NULL)
1458                                         continue;
1459                                 infostream<<"* "<<player->getName()<<"\t";
1460                                 client->PrintInfo(infostream);
1461                         }
1462                 }
1463         }
1464
1465         //if(g_settings->getBool("enable_experimental"))
1466         {
1467
1468         /*
1469                 Check added and deleted active objects
1470         */
1471         {
1472                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1473                 JMutexAutoLock envlock(m_env_mutex);
1474                 JMutexAutoLock conlock(m_con_mutex);
1475
1476                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1477
1478                 // Radius inside which objects are active
1479                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1480                 radius *= MAP_BLOCKSIZE;
1481
1482                 for(core::map<u16, RemoteClient*>::Iterator
1483                         i = m_clients.getIterator();
1484                         i.atEnd() == false; i++)
1485                 {
1486                         RemoteClient *client = i.getNode()->getValue();
1487
1488                         // If definitions and textures have not been sent, don't
1489                         // send objects either
1490                         if(!client->definitions_sent)
1491                                 continue;
1492
1493                         Player *player = m_env->getPlayer(client->peer_id);
1494                         if(player==NULL)
1495                         {
1496                                 // This can happen if the client timeouts somehow
1497                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1498                                                 <<client->peer_id
1499                                                 <<" has no associated player"<<std::endl;*/
1500                                 continue;
1501                         }
1502                         v3s16 pos = floatToInt(player->getPosition(), BS);
1503
1504                         core::map<u16, bool> removed_objects;
1505                         core::map<u16, bool> added_objects;
1506                         m_env->getRemovedActiveObjects(pos, radius,
1507                                         client->m_known_objects, removed_objects);
1508                         m_env->getAddedActiveObjects(pos, radius,
1509                                         client->m_known_objects, added_objects);
1510
1511                         // Ignore if nothing happened
1512                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1513                         {
1514                                 //infostream<<"active objects: none changed"<<std::endl;
1515                                 continue;
1516                         }
1517
1518                         std::string data_buffer;
1519
1520                         char buf[4];
1521
1522                         // Handle removed objects
1523                         writeU16((u8*)buf, removed_objects.size());
1524                         data_buffer.append(buf, 2);
1525                         for(core::map<u16, bool>::Iterator
1526                                         i = removed_objects.getIterator();
1527                                         i.atEnd()==false; i++)
1528                         {
1529                                 // Get object
1530                                 u16 id = i.getNode()->getKey();
1531                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1532
1533                                 // Add to data buffer for sending
1534                                 writeU16((u8*)buf, i.getNode()->getKey());
1535                                 data_buffer.append(buf, 2);
1536
1537                                 // Remove from known objects
1538                                 client->m_known_objects.remove(i.getNode()->getKey());
1539
1540                                 if(obj && obj->m_known_by_count > 0)
1541                                         obj->m_known_by_count--;
1542                         }
1543
1544                         // Handle added objects
1545                         writeU16((u8*)buf, added_objects.size());
1546                         data_buffer.append(buf, 2);
1547                         for(core::map<u16, bool>::Iterator
1548                                         i = added_objects.getIterator();
1549                                         i.atEnd()==false; i++)
1550                         {
1551                                 // Get object
1552                                 u16 id = i.getNode()->getKey();
1553                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1554
1555                                 // Get object type
1556                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1557                                 if(obj == NULL)
1558                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1559                                                         <<": NULL object"<<std::endl;
1560                                 else
1561                                         type = obj->getSendType();
1562
1563                                 // Add to data buffer for sending
1564                                 writeU16((u8*)buf, id);
1565                                 data_buffer.append(buf, 2);
1566                                 writeU8((u8*)buf, type);
1567                                 data_buffer.append(buf, 1);
1568
1569                                 if(obj)
1570                                         data_buffer.append(serializeLongString(
1571                                                         obj->getClientInitializationData(client->net_proto_version)));
1572                                 else
1573                                         data_buffer.append(serializeLongString(""));
1574
1575                                 // Add to known objects
1576                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1577
1578                                 if(obj)
1579                                         obj->m_known_by_count++;
1580                         }
1581
1582                         // Send packet
1583                         SharedBuffer<u8> reply(2 + data_buffer.size());
1584                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1585                         memcpy((char*)&reply[2], data_buffer.c_str(),
1586                                         data_buffer.size());
1587                         // Send as reliable
1588                         m_con.Send(client->peer_id, 0, reply, true);
1589
1590                         verbosestream<<"Server: Sent object remove/add: "
1591                                         <<removed_objects.size()<<" removed, "
1592                                         <<added_objects.size()<<" added, "
1593                                         <<"packet size is "<<reply.getSize()<<std::endl;
1594                 }
1595
1596 #if 0
1597                 /*
1598                         Collect a list of all the objects known by the clients
1599                         and report it back to the environment.
1600                 */
1601
1602                 core::map<u16, bool> all_known_objects;
1603
1604                 for(core::map<u16, RemoteClient*>::Iterator
1605                         i = m_clients.getIterator();
1606                         i.atEnd() == false; i++)
1607                 {
1608                         RemoteClient *client = i.getNode()->getValue();
1609                         // Go through all known objects of client
1610                         for(core::map<u16, bool>::Iterator
1611                                         i = client->m_known_objects.getIterator();
1612                                         i.atEnd()==false; i++)
1613                         {
1614                                 u16 id = i.getNode()->getKey();
1615                                 all_known_objects[id] = true;
1616                         }
1617                 }
1618
1619                 m_env->setKnownActiveObjects(whatever);
1620 #endif
1621
1622         }
1623
1624         /*
1625                 Send object messages
1626         */
1627         {
1628                 JMutexAutoLock envlock(m_env_mutex);
1629                 JMutexAutoLock conlock(m_con_mutex);
1630
1631                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1632
1633                 // Key = object id
1634                 // Value = data sent by object
1635                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1636
1637                 // Get active object messages from environment
1638                 for(;;)
1639                 {
1640                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1641                         if(aom.id == 0)
1642                                 break;
1643
1644                         core::list<ActiveObjectMessage>* message_list = NULL;
1645                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1646                         n = buffered_messages.find(aom.id);
1647                         if(n == NULL)
1648                         {
1649                                 message_list = new core::list<ActiveObjectMessage>;
1650                                 buffered_messages.insert(aom.id, message_list);
1651                         }
1652                         else
1653                         {
1654                                 message_list = n->getValue();
1655                         }
1656                         message_list->push_back(aom);
1657                 }
1658
1659                 // Route data to every client
1660                 for(core::map<u16, RemoteClient*>::Iterator
1661                         i = m_clients.getIterator();
1662                         i.atEnd()==false; i++)
1663                 {
1664                         RemoteClient *client = i.getNode()->getValue();
1665                         std::string reliable_data;
1666                         std::string unreliable_data;
1667                         // Go through all objects in message buffer
1668                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1669                                         j = buffered_messages.getIterator();
1670                                         j.atEnd()==false; j++)
1671                         {
1672                                 // If object is not known by client, skip it
1673                                 u16 id = j.getNode()->getKey();
1674                                 if(client->m_known_objects.find(id) == NULL)
1675                                         continue;
1676                                 // Get message list of object
1677                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1678                                 // Go through every message
1679                                 for(core::list<ActiveObjectMessage>::Iterator
1680                                                 k = list->begin(); k != list->end(); k++)
1681                                 {
1682                                         // Compose the full new data with header
1683                                         ActiveObjectMessage aom = *k;
1684                                         std::string new_data;
1685                                         // Add object id
1686                                         char buf[2];
1687                                         writeU16((u8*)&buf[0], aom.id);
1688                                         new_data.append(buf, 2);
1689                                         // Add data
1690                                         new_data += serializeString(aom.datastring);
1691                                         // Add data to buffer
1692                                         if(aom.reliable)
1693                                                 reliable_data += new_data;
1694                                         else
1695                                                 unreliable_data += new_data;
1696                                 }
1697                         }
1698                         /*
1699                                 reliable_data and unreliable_data are now ready.
1700                                 Send them.
1701                         */
1702                         if(reliable_data.size() > 0)
1703                         {
1704                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1705                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1706                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1707                                                 reliable_data.size());
1708                                 // Send as reliable
1709                                 m_con.Send(client->peer_id, 0, reply, true);
1710                         }
1711                         if(unreliable_data.size() > 0)
1712                         {
1713                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1714                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1715                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1716                                                 unreliable_data.size());
1717                                 // Send as unreliable
1718                                 m_con.Send(client->peer_id, 0, reply, false);
1719                         }
1720
1721                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1722                         {
1723                                 infostream<<"Server: Size of object message data: "
1724                                                 <<"reliable: "<<reliable_data.size()
1725                                                 <<", unreliable: "<<unreliable_data.size()
1726                                                 <<std::endl;
1727                         }*/
1728                 }
1729
1730                 // Clear buffered_messages
1731                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1732                                 i = buffered_messages.getIterator();
1733                                 i.atEnd()==false; i++)
1734                 {
1735                         delete i.getNode()->getValue();
1736                 }
1737         }
1738
1739         } // enable_experimental
1740
1741         /*
1742                 Send queued-for-sending map edit events.
1743         */
1744         {
1745                 // We will be accessing the environment and the connection
1746                 JMutexAutoLock lock(m_env_mutex);
1747                 JMutexAutoLock conlock(m_con_mutex);
1748
1749                 // Don't send too many at a time
1750                 //u32 count = 0;
1751
1752                 // Single change sending is disabled if queue size is not small
1753                 bool disable_single_change_sending = false;
1754                 if(m_unsent_map_edit_queue.size() >= 4)
1755                         disable_single_change_sending = true;
1756
1757                 int event_count = m_unsent_map_edit_queue.size();
1758
1759                 // We'll log the amount of each
1760                 Profiler prof;
1761
1762                 while(m_unsent_map_edit_queue.size() != 0)
1763                 {
1764                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1765
1766                         // Players far away from the change are stored here.
1767                         // Instead of sending the changes, MapBlocks are set not sent
1768                         // for them.
1769                         core::list<u16> far_players;
1770
1771                         if(event->type == MEET_ADDNODE)
1772                         {
1773                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1774                                 prof.add("MEET_ADDNODE", 1);
1775                                 if(disable_single_change_sending)
1776                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1777                                                         &far_players, 5);
1778                                 else
1779                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1780                                                         &far_players, 30);
1781                         }
1782                         else if(event->type == MEET_REMOVENODE)
1783                         {
1784                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1785                                 prof.add("MEET_REMOVENODE", 1);
1786                                 if(disable_single_change_sending)
1787                                         sendRemoveNode(event->p, event->already_known_by_peer,
1788                                                         &far_players, 5);
1789                                 else
1790                                         sendRemoveNode(event->p, event->already_known_by_peer,
1791                                                         &far_players, 30);
1792                         }
1793                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1794                         {
1795                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1796                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1797                                 setBlockNotSent(event->p);
1798                         }
1799                         else if(event->type == MEET_OTHER)
1800                         {
1801                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1802                                 prof.add("MEET_OTHER", 1);
1803                                 for(core::map<v3s16, bool>::Iterator
1804                                                 i = event->modified_blocks.getIterator();
1805                                                 i.atEnd()==false; i++)
1806                                 {
1807                                         v3s16 p = i.getNode()->getKey();
1808                                         setBlockNotSent(p);
1809                                 }
1810                         }
1811                         else
1812                         {
1813                                 prof.add("unknown", 1);
1814                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1815                                                 <<((u32)event->type)<<std::endl;
1816                         }
1817
1818                         /*
1819                                 Set blocks not sent to far players
1820                         */
1821                         if(far_players.size() > 0)
1822                         {
1823                                 // Convert list format to that wanted by SetBlocksNotSent
1824                                 core::map<v3s16, MapBlock*> modified_blocks2;
1825                                 for(core::map<v3s16, bool>::Iterator
1826                                                 i = event->modified_blocks.getIterator();
1827                                                 i.atEnd()==false; i++)
1828                                 {
1829                                         v3s16 p = i.getNode()->getKey();
1830                                         modified_blocks2.insert(p,
1831                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1832                                 }
1833                                 // Set blocks not sent
1834                                 for(core::list<u16>::Iterator
1835                                                 i = far_players.begin();
1836                                                 i != far_players.end(); i++)
1837                                 {
1838                                         u16 peer_id = *i;
1839                                         RemoteClient *client = getClient(peer_id);
1840                                         if(client==NULL)
1841                                                 continue;
1842                                         client->SetBlocksNotSent(modified_blocks2);
1843                                 }
1844                         }
1845
1846                         delete event;
1847
1848                         /*// Don't send too many at a time
1849                         count++;
1850                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1851                                 break;*/
1852                 }
1853
1854                 if(event_count >= 5){
1855                         infostream<<"Server: MapEditEvents:"<<std::endl;
1856                         prof.print(infostream);
1857                 } else if(event_count != 0){
1858                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1859                         prof.print(verbosestream);
1860                 }
1861
1862         }
1863
1864         /*
1865                 Trigger emergethread (it somehow gets to a non-triggered but
1866                 bysy state sometimes)
1867         */
1868         {
1869                 float &counter = m_emergethread_trigger_timer;
1870                 counter += dtime;
1871                 if(counter >= 2.0)
1872                 {
1873                         counter = 0.0;
1874
1875                         m_emergethread.trigger();
1876
1877                         // Update m_enable_rollback_recording here too
1878                         m_enable_rollback_recording =
1879                                         g_settings->getBool("enable_rollback_recording");
1880                 }
1881         }
1882
1883         // Save map, players and auth stuff
1884         {
1885                 float &counter = m_savemap_timer;
1886                 counter += dtime;
1887                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1888                 {
1889                         counter = 0.0;
1890                         JMutexAutoLock lock(m_env_mutex);
1891
1892                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1893
1894                         //Ban stuff
1895                         if(m_banmanager.isModified())
1896                                 m_banmanager.save();
1897
1898                         // Save changed parts of map
1899                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1900
1901                         // Save players
1902                         m_env->serializePlayers(m_path_world);
1903
1904                         // Save environment metadata
1905                         m_env->saveMeta(m_path_world);
1906                 }
1907         }
1908 }
1909
1910 void Server::Receive()
1911 {
1912         DSTACK(__FUNCTION_NAME);
1913         SharedBuffer<u8> data;
1914         u16 peer_id;
1915         u32 datasize;
1916         try{
1917                 {
1918                         JMutexAutoLock conlock(m_con_mutex);
1919                         datasize = m_con.Receive(peer_id, data);
1920                 }
1921
1922                 // This has to be called so that the client list gets synced
1923                 // with the peer list of the connection
1924                 handlePeerChanges();
1925
1926                 ProcessData(*data, datasize, peer_id);
1927         }
1928         catch(con::InvalidIncomingDataException &e)
1929         {
1930                 infostream<<"Server::Receive(): "
1931                                 "InvalidIncomingDataException: what()="
1932                                 <<e.what()<<std::endl;
1933         }
1934         catch(con::PeerNotFoundException &e)
1935         {
1936                 //NOTE: This is not needed anymore
1937
1938                 // The peer has been disconnected.
1939                 // Find the associated player and remove it.
1940
1941                 /*JMutexAutoLock envlock(m_env_mutex);
1942
1943                 infostream<<"ServerThread: peer_id="<<peer_id
1944                                 <<" has apparently closed connection. "
1945                                 <<"Removing player."<<std::endl;
1946
1947                 m_env->removePlayer(peer_id);*/
1948         }
1949 }
1950
1951 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1952 {
1953         DSTACK(__FUNCTION_NAME);
1954         // Environment is locked first.
1955         JMutexAutoLock envlock(m_env_mutex);
1956         JMutexAutoLock conlock(m_con_mutex);
1957
1958         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1959
1960         try{
1961                 Address address = m_con.GetPeerAddress(peer_id);
1962                 std::string addr_s = address.serializeString();
1963
1964                 // drop player if is ip is banned
1965                 if(m_banmanager.isIpBanned(addr_s)){
1966                         infostream<<"Server: A banned client tried to connect from "
1967                                         <<addr_s<<"; banned name was "
1968                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1969                         // This actually doesn't seem to transfer to the client
1970                         SendAccessDenied(m_con, peer_id,
1971                                         L"Your ip is banned. Banned name was "
1972                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1973                         m_con.DeletePeer(peer_id);
1974                         return;
1975                 }
1976         }
1977         catch(con::PeerNotFoundException &e)
1978         {
1979                 infostream<<"Server::ProcessData(): Cancelling: peer "
1980                                 <<peer_id<<" not found"<<std::endl;
1981                 return;
1982         }
1983
1984         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1985
1986         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1987
1988         try
1989         {
1990
1991         if(datasize < 2)
1992                 return;
1993
1994         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
1995
1996         if(command == TOSERVER_INIT)
1997         {
1998                 // [0] u16 TOSERVER_INIT
1999                 // [2] u8 SER_FMT_VER_HIGHEST
2000                 // [3] u8[20] player_name
2001                 // [23] u8[28] password <--- can be sent without this, from old versions
2002
2003                 if(datasize < 2+1+PLAYERNAME_SIZE)
2004                         return;
2005
2006                 verbosestream<<"Server: Got TOSERVER_INIT from "
2007                                 <<peer_id<<std::endl;
2008
2009                 // First byte after command is maximum supported
2010                 // serialization version
2011                 u8 client_max = data[2];
2012                 u8 our_max = SER_FMT_VER_HIGHEST;
2013                 // Use the highest version supported by both
2014                 u8 deployed = core::min_(client_max, our_max);
2015                 // If it's lower than the lowest supported, give up.
2016                 if(deployed < SER_FMT_VER_LOWEST)
2017                         deployed = SER_FMT_VER_INVALID;
2018
2019                 //peer->serialization_version = deployed;
2020                 getClient(peer_id)->pending_serialization_version = deployed;
2021
2022                 if(deployed == SER_FMT_VER_INVALID)
2023                 {
2024                         actionstream<<"Server: A mismatched client tried to connect from "
2025                                         <<addr_s<<std::endl;
2026                         infostream<<"Server: Cannot negotiate "
2027                                         "serialization version with peer "
2028                                         <<peer_id<<std::endl;
2029                         SendAccessDenied(m_con, peer_id, std::wstring(
2030                                         L"Your client's version is not supported.\n"
2031                                         L"Server version is ")
2032                                         + narrow_to_wide(VERSION_STRING) + L"."
2033                         );
2034                         return;
2035                 }
2036
2037                 /*
2038                         Read and check network protocol version
2039                 */
2040
2041                 u16 min_net_proto_version = 0;
2042                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2043                         min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2044
2045                 // Use same version as minimum and maximum if maximum version field
2046                 // doesn't exist (backwards compatibility)
2047                 u16 max_net_proto_version = min_net_proto_version;
2048                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
2049                         max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
2050
2051                 // Start with client's maximum version
2052                 u16 net_proto_version = max_net_proto_version;
2053
2054                 // Figure out a working version if it is possible at all
2055                 if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
2056                                 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX)
2057                 {
2058                         // If maximum is larger than our maximum, go with our maximum
2059                         if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2060                                 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
2061                         // Else go with client's maximum
2062                         else
2063                                 net_proto_version = max_net_proto_version;
2064                 }
2065
2066                 verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
2067                                 <<min_net_proto_version<<", max: "<<max_net_proto_version
2068                                 <<", chosen: "<<net_proto_version<<std::endl;
2069
2070                 getClient(peer_id)->net_proto_version = net_proto_version;
2071
2072                 if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
2073                                 net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2074                 {
2075                         actionstream<<"Server: A mismatched client tried to connect from "<<addr_s
2076                                         <<std::endl;
2077                         SendAccessDenied(m_con, peer_id, std::wstring(
2078                                         L"Your client's version is not supported.\n"
2079                                         L"Server version is ")
2080                                         + narrow_to_wide(VERSION_STRING) + L",\n"
2081                                         + L"server's PROTOCOL_VERSION is "
2082                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
2083                                         + L"..."
2084                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
2085                                         + L", client's PROTOCOL_VERSION is "
2086                                         + narrow_to_wide(itos(min_net_proto_version))
2087                                         + L"..."
2088                                         + narrow_to_wide(itos(max_net_proto_version))
2089                         );
2090                         return;
2091                 }
2092
2093                 if(g_settings->getBool("strict_protocol_version_checking"))
2094                 {
2095                         if(net_proto_version != LATEST_PROTOCOL_VERSION)
2096                         {
2097                                 actionstream<<"Server: A mismatched (strict) client tried to "
2098                                                 <<"connect from "<<addr_s<<std::endl;
2099                                 SendAccessDenied(m_con, peer_id, std::wstring(
2100                                                 L"Your client's version is not supported.\n"
2101                                                 L"Server version is ")
2102                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2103                                                 + L"server's PROTOCOL_VERSION (strict) is "
2104                                                 + narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
2105                                                 + L", client's PROTOCOL_VERSION is "
2106                                                 + narrow_to_wide(itos(min_net_proto_version))
2107                                                 + L"..."
2108                                                 + narrow_to_wide(itos(max_net_proto_version))
2109                                 );
2110                                 return;
2111                         }
2112                 }
2113
2114                 /*
2115                         Set up player
2116                 */
2117
2118                 // Get player name
2119                 char playername[PLAYERNAME_SIZE];
2120                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2121                 {
2122                         playername[i] = data[3+i];
2123                 }
2124                 playername[PLAYERNAME_SIZE-1] = 0;
2125
2126                 if(playername[0]=='\0')
2127                 {
2128                         actionstream<<"Server: Player with an empty name "
2129                                         <<"tried to connect from "<<addr_s<<std::endl;
2130                         SendAccessDenied(m_con, peer_id,
2131                                         L"Empty name");
2132                         return;
2133                 }
2134
2135                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2136                 {
2137                         actionstream<<"Server: Player with an invalid name "
2138                                         <<"tried to connect from "<<addr_s<<std::endl;
2139                         SendAccessDenied(m_con, peer_id,
2140                                         L"Name contains unallowed characters");
2141                         return;
2142                 }
2143
2144                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2145                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2146
2147                 // Get password
2148                 char given_password[PASSWORD_SIZE];
2149                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2150                 {
2151                         // old version - assume blank password
2152                         given_password[0] = 0;
2153                 }
2154                 else
2155                 {
2156                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2157                         {
2158                                 given_password[i] = data[23+i];
2159                         }
2160                         given_password[PASSWORD_SIZE-1] = 0;
2161                 }
2162
2163                 if(!base64_is_valid(given_password)){
2164                         infostream<<"Server: "<<playername
2165                                         <<" supplied invalid password hash"<<std::endl;
2166                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2167                         return;
2168                 }
2169
2170                 std::string checkpwd; // Password hash to check against
2171                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2172
2173                 // If no authentication info exists for user, create it
2174                 if(!has_auth){
2175                         if(!isSingleplayer() &&
2176                                         g_settings->getBool("disallow_empty_password") &&
2177                                         std::string(given_password) == ""){
2178                                 SendAccessDenied(m_con, peer_id, L"Empty passwords are "
2179                                                 L"disallowed. Set a password and try again.");
2180                                 return;
2181                         }
2182                         std::wstring raw_default_password =
2183                                 narrow_to_wide(g_settings->get("default_password"));
2184                         std::string initial_password =
2185                                 translatePassword(playername, raw_default_password);
2186
2187                         // If default_password is empty, allow any initial password
2188                         if (raw_default_password.length() == 0)
2189                                 initial_password = given_password;
2190
2191                         scriptapi_create_auth(m_lua, playername, initial_password);
2192                 }
2193
2194                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2195
2196                 if(!has_auth){
2197                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2198                         return;
2199                 }
2200
2201                 if(given_password != checkpwd){
2202                         infostream<<"Server: peer_id="<<peer_id
2203                                         <<": supplied invalid password for "
2204                                         <<playername<<std::endl;
2205                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2206                         return;
2207                 }
2208
2209                 // Do not allow multiple players in simple singleplayer mode.
2210                 // This isn't a perfect way to do it, but will suffice for now.
2211                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2212                         infostream<<"Server: Not allowing another client to connect in"
2213                                         <<" simple singleplayer mode"<<std::endl;
2214                         SendAccessDenied(m_con, peer_id,
2215                                         L"Running in simple singleplayer mode.");
2216                         return;
2217                 }
2218
2219                 // Enforce user limit.
2220                 // Don't enforce for users that have some admin right
2221                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2222                                 !checkPriv(playername, "server") &&
2223                                 !checkPriv(playername, "ban") &&
2224                                 !checkPriv(playername, "privs") &&
2225                                 !checkPriv(playername, "password") &&
2226                                 playername != g_settings->get("name"))
2227                 {
2228                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2229                                         <<" are already max_users="
2230                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2231                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2232                         return;
2233                 }
2234
2235                 // Get player
2236                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2237
2238                 // If failed, cancel
2239                 if(playersao == NULL)
2240                 {
2241                         errorstream<<"Server: peer_id="<<peer_id
2242                                         <<": failed to emerge player"<<std::endl;
2243                         return;
2244                 }
2245
2246                 /*
2247                         Answer with a TOCLIENT_INIT
2248                 */
2249                 {
2250                         SharedBuffer<u8> reply(2+1+6+8+4);
2251                         writeU16(&reply[0], TOCLIENT_INIT);
2252                         writeU8(&reply[2], deployed);
2253                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2254                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2255                         writeF1000(&reply[2+1+6+8], g_settings->getFloat("dedicated_server_step"));
2256
2257                         // Send as reliable
2258                         m_con.Send(peer_id, 0, reply, true);
2259                 }
2260
2261                 /*
2262                         Send complete position information
2263                 */
2264                 SendMovePlayer(peer_id);
2265
2266                 return;
2267         }
2268
2269         if(command == TOSERVER_INIT2)
2270         {
2271                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2272                                 <<peer_id<<std::endl;
2273
2274                 Player *player = m_env->getPlayer(peer_id);
2275                 if(!player){
2276                         verbosestream<<"Server: TOSERVER_INIT2: "
2277                                         <<"Player not found; ignoring."<<std::endl;
2278                         return;
2279                 }
2280
2281                 RemoteClient *client = getClient(peer_id);
2282                 client->serialization_version =
2283                                 getClient(peer_id)->pending_serialization_version;
2284
2285                 /*
2286                         Send some initialization data
2287                 */
2288
2289                 infostream<<"Server: Sending content to "
2290                                 <<getPlayerName(peer_id)<<std::endl;
2291
2292                 // Send item definitions
2293                 SendItemDef(m_con, peer_id, m_itemdef);
2294
2295                 // Send node definitions
2296                 SendNodeDef(m_con, peer_id, m_nodedef, client->net_proto_version);
2297
2298                 // Send media announcement
2299                 sendMediaAnnouncement(peer_id);
2300
2301                 // Send privileges
2302                 SendPlayerPrivileges(peer_id);
2303
2304                 // Send inventory formspec
2305                 SendPlayerInventoryFormspec(peer_id);
2306
2307                 // Send inventory
2308                 UpdateCrafting(peer_id);
2309                 SendInventory(peer_id);
2310
2311                 // Send HP
2312                 SendPlayerHP(peer_id);
2313
2314                 // Send detached inventories
2315                 sendDetachedInventories(peer_id);
2316
2317                 // Show death screen if necessary
2318                 if(player->hp == 0)
2319                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2320
2321                 // Send time of day
2322                 {
2323                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2324                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2325                         m_con.Send(peer_id, 0, data, true);
2326                 }
2327
2328                 // Note things in chat if not in simple singleplayer mode
2329                 if(!m_simple_singleplayer_mode)
2330                 {
2331                         // Send information about server to player in chat
2332                         SendChatMessage(peer_id, getStatusString());
2333
2334                         // Send information about joining in chat
2335                         {
2336                                 std::wstring name = L"unknown";
2337                                 Player *player = m_env->getPlayer(peer_id);
2338                                 if(player != NULL)
2339                                         name = narrow_to_wide(player->getName());
2340
2341                                 std::wstring message;
2342                                 message += L"*** ";
2343                                 message += name;
2344                                 message += L" joined the game.";
2345                                 BroadcastChatMessage(message);
2346                         }
2347                 }
2348
2349                 // Warnings about protocol version can be issued here
2350                 if(getClient(peer_id)->net_proto_version < LATEST_PROTOCOL_VERSION)
2351                 {
2352                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT'S "
2353                                         L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
2354                 }
2355
2356                 /*
2357                         Print out action
2358                 */
2359                 {
2360                         std::ostringstream os(std::ios_base::binary);
2361                         for(core::map<u16, RemoteClient*>::Iterator
2362                                 i = m_clients.getIterator();
2363                                 i.atEnd() == false; i++)
2364                         {
2365                                 RemoteClient *client = i.getNode()->getValue();
2366                                 assert(client->peer_id == i.getNode()->getKey());
2367                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2368                                         continue;
2369                                 // Get player
2370                                 Player *player = m_env->getPlayer(client->peer_id);
2371                                 if(!player)
2372                                         continue;
2373                                 // Get name of player
2374                                 os<<player->getName()<<" ";
2375                         }
2376
2377                         actionstream<<player->getName()<<" joins game. List of players: "
2378                                         <<os.str()<<std::endl;
2379                 }
2380
2381                 return;
2382         }
2383
2384         if(peer_ser_ver == SER_FMT_VER_INVALID)
2385         {
2386                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2387                                 " serialization format invalid or not initialized."
2388                                 " Skipping incoming command="<<command<<std::endl;
2389                 return;
2390         }
2391
2392         Player *player = m_env->getPlayer(peer_id);
2393         if(player == NULL){
2394                 infostream<<"Server::ProcessData(): Cancelling: "
2395                                 "No player for peer_id="<<peer_id
2396                                 <<std::endl;
2397                 return;
2398         }
2399
2400         PlayerSAO *playersao = player->getPlayerSAO();
2401         if(playersao == NULL){
2402                 infostream<<"Server::ProcessData(): Cancelling: "
2403                                 "No player object for peer_id="<<peer_id
2404                                 <<std::endl;
2405                 return;
2406         }
2407
2408         if(command == TOSERVER_PLAYERPOS)
2409         {
2410                 if(datasize < 2+12+12+4+4)
2411                         return;
2412
2413                 u32 start = 0;
2414                 v3s32 ps = readV3S32(&data[start+2]);
2415                 v3s32 ss = readV3S32(&data[start+2+12]);
2416                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2417                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2418                 u32 keyPressed = 0;
2419                 if(datasize >= 2+12+12+4+4+4)
2420                         keyPressed = (u32)readU32(&data[2+12+12+4+4]);
2421                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2422                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2423                 pitch = wrapDegrees(pitch);
2424                 yaw = wrapDegrees(yaw);
2425
2426                 player->setPosition(position);
2427                 player->setSpeed(speed);
2428                 player->setPitch(pitch);
2429                 player->setYaw(yaw);
2430                 player->keyPressed=keyPressed;
2431                 player->control.up = (bool)(keyPressed&1);
2432                 player->control.down = (bool)(keyPressed&2);
2433                 player->control.left = (bool)(keyPressed&4);
2434                 player->control.right = (bool)(keyPressed&8);
2435                 player->control.jump = (bool)(keyPressed&16);
2436                 player->control.aux1 = (bool)(keyPressed&32);
2437                 player->control.sneak = (bool)(keyPressed&64);
2438                 player->control.LMB = (bool)(keyPressed&128);
2439                 player->control.RMB = (bool)(keyPressed&256);
2440
2441                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2442                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2443                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2444         }
2445         else if(command == TOSERVER_GOTBLOCKS)
2446         {
2447                 if(datasize < 2+1)
2448                         return;
2449
2450                 /*
2451                         [0] u16 command
2452                         [2] u8 count
2453                         [3] v3s16 pos_0
2454                         [3+6] v3s16 pos_1
2455                         ...
2456                 */
2457
2458                 u16 count = data[2];
2459                 for(u16 i=0; i<count; i++)
2460                 {
2461                         if((s16)datasize < 2+1+(i+1)*6)
2462                                 throw con::InvalidIncomingDataException
2463                                         ("GOTBLOCKS length is too short");
2464                         v3s16 p = readV3S16(&data[2+1+i*6]);
2465                         /*infostream<<"Server: GOTBLOCKS ("
2466                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2467                         RemoteClient *client = getClient(peer_id);
2468                         client->GotBlock(p);
2469                 }
2470         }
2471         else if(command == TOSERVER_DELETEDBLOCKS)
2472         {
2473                 if(datasize < 2+1)
2474                         return;
2475
2476                 /*
2477                         [0] u16 command
2478                         [2] u8 count
2479                         [3] v3s16 pos_0
2480                         [3+6] v3s16 pos_1
2481                         ...
2482                 */
2483
2484                 u16 count = data[2];
2485                 for(u16 i=0; i<count; i++)
2486                 {
2487                         if((s16)datasize < 2+1+(i+1)*6)
2488                                 throw con::InvalidIncomingDataException
2489                                         ("DELETEDBLOCKS length is too short");
2490                         v3s16 p = readV3S16(&data[2+1+i*6]);
2491                         /*infostream<<"Server: DELETEDBLOCKS ("
2492                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2493                         RemoteClient *client = getClient(peer_id);
2494                         client->SetBlockNotSent(p);
2495                 }
2496         }
2497         else if(command == TOSERVER_CLICK_OBJECT)
2498         {
2499                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2500                 return;
2501         }
2502         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2503         {
2504                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2505                 return;
2506         }
2507         else if(command == TOSERVER_GROUND_ACTION)
2508         {
2509                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2510                 return;
2511
2512         }
2513         else if(command == TOSERVER_RELEASE)
2514         {
2515                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2516                 return;
2517         }
2518         else if(command == TOSERVER_SIGNTEXT)
2519         {
2520                 infostream<<"Server: SIGNTEXT not supported anymore"
2521                                 <<std::endl;
2522                 return;
2523         }
2524         else if(command == TOSERVER_SIGNNODETEXT)
2525         {
2526                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2527                                 <<std::endl;
2528                 return;
2529         }
2530         else if(command == TOSERVER_INVENTORY_ACTION)
2531         {
2532                 // Strip command and create a stream
2533                 std::string datastring((char*)&data[2], datasize-2);
2534                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2535                 std::istringstream is(datastring, std::ios_base::binary);
2536                 // Create an action
2537                 InventoryAction *a = InventoryAction::deSerialize(is);
2538                 if(a == NULL)
2539                 {
2540                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2541                                         <<"InventoryAction::deSerialize() returned NULL"
2542                                         <<std::endl;
2543                         return;
2544                 }
2545
2546                 // If something goes wrong, this player is to blame
2547                 RollbackScopeActor rollback_scope(m_rollback,
2548                                 std::string("player:")+player->getName());
2549
2550                 /*
2551                         Note: Always set inventory not sent, to repair cases
2552                         where the client made a bad prediction.
2553                 */
2554
2555                 /*
2556                         Handle restrictions and special cases of the move action
2557                 */
2558                 if(a->getType() == IACTION_MOVE)
2559                 {
2560                         IMoveAction *ma = (IMoveAction*)a;
2561
2562                         ma->from_inv.applyCurrentPlayer(player->getName());
2563                         ma->to_inv.applyCurrentPlayer(player->getName());
2564
2565                         setInventoryModified(ma->from_inv);
2566                         setInventoryModified(ma->to_inv);
2567
2568                         bool from_inv_is_current_player =
2569                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2570                                 (ma->from_inv.name == player->getName());
2571
2572                         bool to_inv_is_current_player =
2573                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2574                                 (ma->to_inv.name == player->getName());
2575
2576                         /*
2577                                 Disable moving items out of craftpreview
2578                         */
2579                         if(ma->from_list == "craftpreview")
2580                         {
2581                                 infostream<<"Ignoring IMoveAction from "
2582                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2583                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2584                                                 <<" because src is "<<ma->from_list<<std::endl;
2585                                 delete a;
2586                                 return;
2587                         }
2588
2589                         /*
2590                                 Disable moving items into craftresult and craftpreview
2591                         */
2592                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2593                         {
2594                                 infostream<<"Ignoring IMoveAction from "
2595                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2596                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2597                                                 <<" because dst is "<<ma->to_list<<std::endl;
2598                                 delete a;
2599                                 return;
2600                         }
2601
2602                         // Disallow moving items in elsewhere than player's inventory
2603                         // if not allowed to interact
2604                         if(!checkPriv(player->getName(), "interact") &&
2605                                         (!from_inv_is_current_player ||
2606                                         !to_inv_is_current_player))
2607                         {
2608                                 infostream<<"Cannot move outside of player's inventory: "
2609                                                 <<"No interact privilege"<<std::endl;
2610                                 delete a;
2611                                 return;
2612                         }
2613                 }
2614                 /*
2615                         Handle restrictions and special cases of the drop action
2616                 */
2617                 else if(a->getType() == IACTION_DROP)
2618                 {
2619                         IDropAction *da = (IDropAction*)a;
2620
2621                         da->from_inv.applyCurrentPlayer(player->getName());
2622
2623                         setInventoryModified(da->from_inv);
2624
2625                         // Disallow dropping items if not allowed to interact
2626                         if(!checkPriv(player->getName(), "interact"))
2627                         {
2628                                 delete a;
2629                                 return;
2630                         }
2631                 }
2632                 /*
2633                         Handle restrictions and special cases of the craft action
2634                 */
2635                 else if(a->getType() == IACTION_CRAFT)
2636                 {
2637                         ICraftAction *ca = (ICraftAction*)a;
2638
2639                         ca->craft_inv.applyCurrentPlayer(player->getName());
2640
2641                         setInventoryModified(ca->craft_inv);
2642
2643                         //bool craft_inv_is_current_player =
2644                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2645                         //      (ca->craft_inv.name == player->getName());
2646
2647                         // Disallow crafting if not allowed to interact
2648                         if(!checkPriv(player->getName(), "interact"))
2649                         {
2650                                 infostream<<"Cannot craft: "
2651                                                 <<"No interact privilege"<<std::endl;
2652                                 delete a;
2653                                 return;
2654                         }
2655                 }
2656
2657                 // Do the action
2658                 a->apply(this, playersao, this);
2659                 // Eat the action
2660                 delete a;
2661         }
2662         else if(command == TOSERVER_CHAT_MESSAGE)
2663         {
2664                 /*
2665                         u16 command
2666                         u16 length
2667                         wstring message
2668                 */
2669                 u8 buf[6];
2670                 std::string datastring((char*)&data[2], datasize-2);
2671                 std::istringstream is(datastring, std::ios_base::binary);
2672
2673                 // Read stuff
2674                 is.read((char*)buf, 2);
2675                 u16 len = readU16(buf);
2676
2677                 std::wstring message;
2678                 for(u16 i=0; i<len; i++)
2679                 {
2680                         is.read((char*)buf, 2);
2681                         message += (wchar_t)readU16(buf);
2682                 }
2683
2684                 // If something goes wrong, this player is to blame
2685                 RollbackScopeActor rollback_scope(m_rollback,
2686                                 std::string("player:")+player->getName());
2687
2688                 // Get player name of this client
2689                 std::wstring name = narrow_to_wide(player->getName());
2690
2691                 // Run script hook
2692                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2693                                 wide_to_narrow(message));
2694                 // If script ate the message, don't proceed
2695                 if(ate)
2696                         return;
2697
2698                 // Line to send to players
2699                 std::wstring line;
2700                 // Whether to send to the player that sent the line
2701                 bool send_to_sender = false;
2702                 // Whether to send to other players
2703                 bool send_to_others = false;
2704
2705                 // Commands are implemented in Lua, so only catch invalid
2706                 // commands that were not "eaten" and send an error back
2707                 if(message[0] == L'/')
2708                 {
2709                         message = message.substr(1);
2710                         send_to_sender = true;
2711                         if(message.length() == 0)
2712                                 line += L"-!- Empty command";
2713                         else
2714                                 line += L"-!- Invalid command: " + str_split(message, L' ')[0];
2715                 }
2716                 else
2717                 {
2718                         if(checkPriv(player->getName(), "shout")){
2719                                 line += L"<";
2720                                 line += name;
2721                                 line += L"> ";
2722                                 line += message;
2723                                 send_to_others = true;
2724                         } else {
2725                                 line += L"-!- You don't have permission to shout.";
2726                                 send_to_sender = true;
2727                         }
2728                 }
2729
2730                 if(line != L"")
2731                 {
2732                         if(send_to_others)
2733                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2734
2735                         /*
2736                                 Send the message to clients
2737                         */
2738                         for(core::map<u16, RemoteClient*>::Iterator
2739                                 i = m_clients.getIterator();
2740                                 i.atEnd() == false; i++)
2741                         {
2742                                 // Get client and check that it is valid
2743                                 RemoteClient *client = i.getNode()->getValue();
2744                                 assert(client->peer_id == i.getNode()->getKey());
2745                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2746                                         continue;
2747
2748                                 // Filter recipient
2749                                 bool sender_selected = (peer_id == client->peer_id);
2750                                 if(sender_selected == true && send_to_sender == false)
2751                                         continue;
2752                                 if(sender_selected == false && send_to_others == false)
2753                                         continue;
2754
2755                                 SendChatMessage(client->peer_id, line);
2756                         }
2757                 }
2758         }
2759         else if(command == TOSERVER_DAMAGE)
2760         {
2761                 std::string datastring((char*)&data[2], datasize-2);
2762                 std::istringstream is(datastring, std::ios_base::binary);
2763                 u8 damage = readU8(is);
2764
2765                 actionstream<<player->getName()<<" damaged by "
2766                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2767                                 <<std::endl;
2768
2769                 playersao->setHP(playersao->getHP() - damage);
2770
2771                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2772                         DiePlayer(peer_id);
2773
2774                 if(playersao->m_hp_not_sent)
2775                         SendPlayerHP(peer_id);
2776         }
2777         else if(command == TOSERVER_PASSWORD)
2778         {
2779                 /*
2780                         [0] u16 TOSERVER_PASSWORD
2781                         [2] u8[28] old password
2782                         [30] u8[28] new password
2783                 */
2784
2785                 if(datasize != 2+PASSWORD_SIZE*2)
2786                         return;
2787                 /*char password[PASSWORD_SIZE];
2788                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2789                         password[i] = data[2+i];
2790                 password[PASSWORD_SIZE-1] = 0;*/
2791                 std::string oldpwd;
2792                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2793                 {
2794                         char c = data[2+i];
2795                         if(c == 0)
2796                                 break;
2797                         oldpwd += c;
2798                 }
2799                 std::string newpwd;
2800                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2801                 {
2802                         char c = data[2+PASSWORD_SIZE+i];
2803                         if(c == 0)
2804                                 break;
2805                         newpwd += c;
2806                 }
2807
2808                 if(!base64_is_valid(newpwd)){
2809                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2810                         // Wrong old password supplied!!
2811                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2812                         return;
2813                 }
2814
2815                 infostream<<"Server: Client requests a password change from "
2816                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2817
2818                 std::string playername = player->getName();
2819
2820                 std::string checkpwd;
2821                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2822
2823                 if(oldpwd != checkpwd)
2824                 {
2825                         infostream<<"Server: invalid old password"<<std::endl;
2826                         // Wrong old password supplied!!
2827                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2828                         return;
2829                 }
2830
2831                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2832                 if(success){
2833                         actionstream<<player->getName()<<" changes password"<<std::endl;
2834                         SendChatMessage(peer_id, L"Password change successful.");
2835                 } else {
2836                         actionstream<<player->getName()<<" tries to change password but "
2837                                         <<"it fails"<<std::endl;
2838                         SendChatMessage(peer_id, L"Password change failed or inavailable.");
2839                 }
2840         }
2841         else if(command == TOSERVER_PLAYERITEM)
2842         {
2843                 if (datasize < 2+2)
2844                         return;
2845
2846                 u16 item = readU16(&data[2]);
2847                 playersao->setWieldIndex(item);
2848         }
2849         else if(command == TOSERVER_RESPAWN)
2850         {
2851                 if(player->hp != 0)
2852                         return;
2853
2854                 RespawnPlayer(peer_id);
2855
2856                 actionstream<<player->getName()<<" respawns at "
2857                                 <<PP(player->getPosition()/BS)<<std::endl;
2858
2859                 // ActiveObject is added to environment in AsyncRunStep after
2860                 // the previous addition has been succesfully removed
2861         }
2862         else if(command == TOSERVER_REQUEST_MEDIA) {
2863                 std::string datastring((char*)&data[2], datasize-2);
2864                 std::istringstream is(datastring, std::ios_base::binary);
2865
2866                 core::list<MediaRequest> tosend;
2867                 u16 numfiles = readU16(is);
2868
2869                 infostream<<"Sending "<<numfiles<<" files to "
2870                                 <<getPlayerName(peer_id)<<std::endl;
2871                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2872
2873                 for(int i = 0; i < numfiles; i++) {
2874                         std::string name = deSerializeString(is);
2875                         tosend.push_back(MediaRequest(name));
2876                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2877                                         <<name<<std::endl;
2878                 }
2879
2880                 sendRequestedMedia(peer_id, tosend);
2881
2882                 // Now the client should know about everything
2883                 // (definitions and files)
2884                 getClient(peer_id)->definitions_sent = true;
2885         }
2886         else if(command == TOSERVER_INTERACT)
2887         {
2888                 std::string datastring((char*)&data[2], datasize-2);
2889                 std::istringstream is(datastring, std::ios_base::binary);
2890
2891                 /*
2892                         [0] u16 command
2893                         [2] u8 action
2894                         [3] u16 item
2895                         [5] u32 length of the next item
2896                         [9] serialized PointedThing
2897                         actions:
2898                         0: start digging (from undersurface) or use
2899                         1: stop digging (all parameters ignored)
2900                         2: digging completed
2901                         3: place block or item (to abovesurface)
2902                         4: use item
2903                 */
2904                 u8 action = readU8(is);
2905                 u16 item_i = readU16(is);
2906                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2907                 PointedThing pointed;
2908                 pointed.deSerialize(tmp_is);
2909
2910                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2911                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2912
2913                 if(player->hp == 0)
2914                 {
2915                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2916                                 <<" tried to interact, but is dead!"<<std::endl;
2917                         return;
2918                 }
2919
2920                 v3f player_pos = playersao->getLastGoodPosition();
2921
2922                 // Update wielded item
2923                 playersao->setWieldIndex(item_i);
2924
2925                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2926                 v3s16 p_under = pointed.node_undersurface;
2927                 v3s16 p_above = pointed.node_abovesurface;
2928
2929                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2930                 ServerActiveObject *pointed_object = NULL;
2931                 if(pointed.type == POINTEDTHING_OBJECT)
2932                 {
2933                         pointed_object = m_env->getActiveObject(pointed.object_id);
2934                         if(pointed_object == NULL)
2935                         {
2936                                 verbosestream<<"TOSERVER_INTERACT: "
2937                                         "pointed object is NULL"<<std::endl;
2938                                 return;
2939                         }
2940
2941                 }
2942
2943                 v3f pointed_pos_under = player_pos;
2944                 v3f pointed_pos_above = player_pos;
2945                 if(pointed.type == POINTEDTHING_NODE)
2946                 {
2947                         pointed_pos_under = intToFloat(p_under, BS);
2948                         pointed_pos_above = intToFloat(p_above, BS);
2949                 }
2950                 else if(pointed.type == POINTEDTHING_OBJECT)
2951                 {
2952                         pointed_pos_under = pointed_object->getBasePosition();
2953                         pointed_pos_above = pointed_pos_under;
2954                 }
2955
2956                 /*
2957                         Check that target is reasonably close
2958                         (only when digging or placing things)
2959                 */
2960                 if(action == 0 || action == 2 || action == 3)
2961                 {
2962                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2963                         float max_d = BS * 14; // Just some large enough value
2964                         if(d > max_d){
2965                                 actionstream<<"Player "<<player->getName()
2966                                                 <<" tried to access "<<pointed.dump()
2967                                                 <<" from too far: "
2968                                                 <<"d="<<d<<", max_d="<<max_d
2969                                                 <<". ignoring."<<std::endl;
2970                                 // Re-send block to revert change on client-side
2971                                 RemoteClient *client = getClient(peer_id);
2972                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2973                                 client->SetBlockNotSent(blockpos);
2974                                 // Do nothing else
2975                                 return;
2976                         }
2977                 }
2978
2979                 /*
2980                         Make sure the player is allowed to do it
2981                 */
2982                 if(!checkPriv(player->getName(), "interact"))
2983                 {
2984                         actionstream<<player->getName()<<" attempted to interact with "
2985                                         <<pointed.dump()<<" without 'interact' privilege"
2986                                         <<std::endl;
2987                         // Re-send block to revert change on client-side
2988                         RemoteClient *client = getClient(peer_id);
2989                         // Digging completed -> under
2990                         if(action == 2){
2991                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2992                                 client->SetBlockNotSent(blockpos);
2993                         }
2994                         // Placement -> above
2995                         if(action == 3){
2996                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
2997                                 client->SetBlockNotSent(blockpos);
2998                         }
2999                         return;
3000                 }
3001
3002                 /*
3003                         If something goes wrong, this player is to blame
3004                 */
3005                 RollbackScopeActor rollback_scope(m_rollback,
3006                                 std::string("player:")+player->getName());
3007
3008                 /*
3009                         0: start digging or punch object
3010                 */
3011                 if(action == 0)
3012                 {
3013                         if(pointed.type == POINTEDTHING_NODE)
3014                         {
3015                                 /*
3016                                         NOTE: This can be used in the future to check if
3017                                         somebody is cheating, by checking the timing.
3018                                 */
3019                                 MapNode n(CONTENT_IGNORE);
3020                                 try
3021                                 {
3022                                         n = m_env->getMap().getNode(p_under);
3023                                 }
3024                                 catch(InvalidPositionException &e)
3025                                 {
3026                                         infostream<<"Server: Not punching: Node not found."
3027                                                         <<" Adding block to emerge queue."
3028                                                         <<std::endl;
3029                                         m_emerge_queue.addBlock(peer_id,
3030                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3031                                 }
3032                                 if(n.getContent() != CONTENT_IGNORE)
3033                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
3034                                 // Cheat prevention
3035                                 playersao->noCheatDigStart(p_under);
3036                         }
3037                         else if(pointed.type == POINTEDTHING_OBJECT)
3038                         {
3039                                 // Skip if object has been removed
3040                                 if(pointed_object->m_removed)
3041                                         return;
3042
3043                                 actionstream<<player->getName()<<" punches object "
3044                                                 <<pointed.object_id<<": "
3045                                                 <<pointed_object->getDescription()<<std::endl;
3046
3047                                 ItemStack punchitem = playersao->getWieldedItem();
3048                                 ToolCapabilities toolcap =
3049                                                 punchitem.getToolCapabilities(m_itemdef);
3050                                 v3f dir = (pointed_object->getBasePosition() -
3051                                                 (player->getPosition() + player->getEyeOffset())
3052                                                         ).normalize();
3053                                 float time_from_last_punch =
3054                                         playersao->resetTimeFromLastPunch();
3055                                 pointed_object->punch(dir, &toolcap, playersao,
3056                                                 time_from_last_punch);
3057                         }
3058
3059                 } // action == 0
3060
3061                 /*
3062                         1: stop digging
3063                 */
3064                 else if(action == 1)
3065                 {
3066                 } // action == 1
3067
3068                 /*
3069                         2: Digging completed
3070                 */
3071                 else if(action == 2)
3072                 {
3073                         // Only digging of nodes
3074                         if(pointed.type == POINTEDTHING_NODE)
3075                         {
3076                                 MapNode n(CONTENT_IGNORE);
3077                                 try
3078                                 {
3079                                         n = m_env->getMap().getNode(p_under);
3080                                 }
3081                                 catch(InvalidPositionException &e)
3082                                 {
3083                                         infostream<<"Server: Not finishing digging: Node not found."
3084                                                         <<" Adding block to emerge queue."
3085                                                         <<std::endl;
3086                                         m_emerge_queue.addBlock(peer_id,
3087                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3088                                 }
3089
3090                                 /* Cheat prevention */
3091                                 bool is_valid_dig = true;
3092                                 if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
3093                                 {
3094                                         v3s16 nocheat_p = playersao->getNoCheatDigPos();
3095                                         float nocheat_t = playersao->getNoCheatDigTime();
3096                                         playersao->noCheatDigEnd();
3097                                         // If player didn't start digging this, ignore dig
3098                                         if(nocheat_p != p_under){
3099                                                 infostream<<"Server: NoCheat: "<<player->getName()
3100                                                                 <<" started digging "
3101                                                                 <<PP(nocheat_p)<<" and completed digging "
3102                                                                 <<PP(p_under)<<"; not digging."<<std::endl;
3103                                                 is_valid_dig = false;
3104                                         }
3105                                         // Get player's wielded item
3106                                         ItemStack playeritem;
3107                                         InventoryList *mlist = playersao->getInventory()->getList("main");
3108                                         if(mlist != NULL)
3109                                                 playeritem = mlist->getItem(playersao->getWieldIndex());
3110                                         ToolCapabilities playeritem_toolcap =
3111                                                         playeritem.getToolCapabilities(m_itemdef);
3112                                         // Get diggability and expected digging time
3113                                         DigParams params = getDigParams(m_nodedef->get(n).groups,
3114                                                         &playeritem_toolcap);
3115                                         // If can't dig, try hand
3116                                         if(!params.diggable){
3117                                                 const ItemDefinition &hand = m_itemdef->get("");
3118                                                 const ToolCapabilities *tp = hand.tool_capabilities;
3119                                                 if(tp)
3120                                                         params = getDigParams(m_nodedef->get(n).groups, tp);
3121                                         }
3122                                         // If can't dig, ignore dig
3123                                         if(!params.diggable){
3124                                                 infostream<<"Server: NoCheat: "<<player->getName()
3125                                                                 <<" completed digging "<<PP(p_under)
3126                                                                 <<", which is not diggable with tool. not digging."
3127                                                                 <<std::endl;
3128                                                 is_valid_dig = false;
3129                                         }
3130                                         // If time is considerably too short, ignore dig
3131                                         // Check time only for medium and slow timed digs
3132                                         if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
3133                                                 infostream<<"Server: NoCheat: "<<player->getName()
3134                                                                 <<" completed digging "
3135                                                                 <<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
3136                                                                 <<params.time<<"s; not digging."<<std::endl;
3137                                                 is_valid_dig = false;
3138                                         }
3139                                 }
3140
3141                                 /* Actually dig node */
3142
3143                                 if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
3144                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3145
3146                                 // Send unusual result (that is, node not being removed)
3147                                 if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3148                                 {
3149                                         // Re-send block to revert change on client-side
3150                                         RemoteClient *client = getClient(peer_id);
3151                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3152                                         client->SetBlockNotSent(blockpos);
3153                                 }
3154                         }
3155                 } // action == 2
3156
3157                 /*
3158                         3: place block or right-click object
3159                 */
3160                 else if(action == 3)
3161                 {
3162                         ItemStack item = playersao->getWieldedItem();
3163
3164                         // Reset build time counter
3165                         if(pointed.type == POINTEDTHING_NODE &&
3166                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3167                                 getClient(peer_id)->m_time_from_building = 0.0;
3168
3169                         if(pointed.type == POINTEDTHING_OBJECT)
3170                         {
3171                                 // Right click object
3172
3173                                 // Skip if object has been removed
3174                                 if(pointed_object->m_removed)
3175                                         return;
3176
3177                                 actionstream<<player->getName()<<" right-clicks object "
3178                                                 <<pointed.object_id<<": "
3179                                                 <<pointed_object->getDescription()<<std::endl;
3180
3181                                 // Do stuff
3182                                 pointed_object->rightClick(playersao);
3183                         }
3184                         else if(scriptapi_item_on_place(m_lua,
3185                                         item, playersao, pointed))
3186                         {
3187                                 // Placement was handled in lua
3188
3189                                 // Apply returned ItemStack
3190                                 playersao->setWieldedItem(item);
3191                         }
3192
3193                         // If item has node placement prediction, always send the above
3194                         // node to make sure the client knows what exactly happened
3195                         if(item.getDefinition(m_itemdef).node_placement_prediction != ""){
3196                                 RemoteClient *client = getClient(peer_id);
3197                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3198                                 client->SetBlockNotSent(blockpos);
3199                         }
3200                 } // action == 3
3201
3202                 /*
3203                         4: use
3204                 */
3205                 else if(action == 4)
3206                 {
3207                         ItemStack item = playersao->getWieldedItem();
3208
3209                         actionstream<<player->getName()<<" uses "<<item.name
3210                                         <<", pointing at "<<pointed.dump()<<std::endl;
3211
3212                         if(scriptapi_item_on_use(m_lua,
3213                                         item, playersao, pointed))
3214                         {
3215                                 // Apply returned ItemStack
3216                                 playersao->setWieldedItem(item);
3217                         }
3218
3219                 } // action == 4
3220
3221
3222                 /*
3223                         Catch invalid actions
3224                 */
3225                 else
3226                 {
3227                         infostream<<"WARNING: Server: Invalid action "
3228                                         <<action<<std::endl;
3229                 }
3230         }
3231         else if(command == TOSERVER_REMOVED_SOUNDS)
3232         {
3233                 std::string datastring((char*)&data[2], datasize-2);
3234                 std::istringstream is(datastring, std::ios_base::binary);
3235
3236                 int num = readU16(is);
3237                 for(int k=0; k<num; k++){
3238                         s32 id = readS32(is);
3239                         std::map<s32, ServerPlayingSound>::iterator i =
3240                                         m_playing_sounds.find(id);
3241                         if(i == m_playing_sounds.end())
3242                                 continue;
3243                         ServerPlayingSound &psound = i->second;
3244                         psound.clients.erase(peer_id);
3245                         if(psound.clients.size() == 0)
3246                                 m_playing_sounds.erase(i++);
3247                 }
3248         }
3249         else if(command == TOSERVER_NODEMETA_FIELDS)
3250         {
3251                 std::string datastring((char*)&data[2], datasize-2);
3252                 std::istringstream is(datastring, std::ios_base::binary);
3253
3254                 v3s16 p = readV3S16(is);
3255                 std::string formname = deSerializeString(is);
3256                 int num = readU16(is);
3257                 std::map<std::string, std::string> fields;
3258                 for(int k=0; k<num; k++){
3259                         std::string fieldname = deSerializeString(is);
3260                         std::string fieldvalue = deSerializeLongString(is);
3261                         fields[fieldname] = fieldvalue;
3262                 }
3263
3264                 // If something goes wrong, this player is to blame
3265                 RollbackScopeActor rollback_scope(m_rollback,
3266                                 std::string("player:")+player->getName());
3267
3268                 // Check the target node for rollback data; leave others unnoticed
3269                 RollbackNode rn_old(&m_env->getMap(), p, this);
3270
3271                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3272                                 playersao);
3273
3274                 // Report rollback data
3275                 RollbackNode rn_new(&m_env->getMap(), p, this);
3276                 if(rollback() && rn_new != rn_old){
3277                         RollbackAction action;
3278                         action.setSetNode(p, rn_old, rn_new);
3279                         rollback()->reportAction(action);
3280                 }
3281         }
3282         else if(command == TOSERVER_INVENTORY_FIELDS)
3283         {
3284                 std::string datastring((char*)&data[2], datasize-2);
3285                 std::istringstream is(datastring, std::ios_base::binary);
3286
3287                 std::string formname = deSerializeString(is);
3288                 int num = readU16(is);
3289                 std::map<std::string, std::string> fields;
3290                 for(int k=0; k<num; k++){
3291                         std::string fieldname = deSerializeString(is);
3292                         std::string fieldvalue = deSerializeLongString(is);
3293                         fields[fieldname] = fieldvalue;
3294                 }
3295
3296                 scriptapi_on_player_receive_fields(m_lua, playersao, formname, fields);
3297         }
3298         else
3299         {
3300                 infostream<<"Server::ProcessData(): Ignoring "
3301                                 "unknown command "<<command<<std::endl;
3302         }
3303
3304         } //try
3305         catch(SendFailedException &e)
3306         {
3307                 errorstream<<"Server::ProcessData(): SendFailedException: "
3308                                 <<"what="<<e.what()
3309                                 <<std::endl;
3310         }
3311 }
3312
3313 void Server::onMapEditEvent(MapEditEvent *event)
3314 {
3315         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3316         if(m_ignore_map_edit_events)
3317                 return;
3318         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3319                 return;
3320         MapEditEvent *e = event->clone();
3321         m_unsent_map_edit_queue.push_back(e);
3322 }
3323
3324 Inventory* Server::getInventory(const InventoryLocation &loc)
3325 {
3326         switch(loc.type){
3327         case InventoryLocation::UNDEFINED:
3328         {}
3329         break;
3330         case InventoryLocation::CURRENT_PLAYER:
3331         {}
3332         break;
3333         case InventoryLocation::PLAYER:
3334         {
3335                 Player *player = m_env->getPlayer(loc.name.c_str());
3336                 if(!player)
3337                         return NULL;
3338                 PlayerSAO *playersao = player->getPlayerSAO();
3339                 if(!playersao)
3340                         return NULL;
3341                 return playersao->getInventory();
3342         }
3343         break;
3344         case InventoryLocation::NODEMETA:
3345         {
3346                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3347                 if(!meta)
3348                         return NULL;
3349                 return meta->getInventory();
3350         }
3351         break;
3352         case InventoryLocation::DETACHED:
3353         {
3354                 if(m_detached_inventories.count(loc.name) == 0)
3355                         return NULL;
3356                 return m_detached_inventories[loc.name];
3357         }
3358         break;
3359         default:
3360                 assert(0);
3361         }
3362         return NULL;
3363 }
3364 void Server::setInventoryModified(const InventoryLocation &loc)
3365 {
3366         switch(loc.type){
3367         case InventoryLocation::UNDEFINED:
3368         {}
3369         break;
3370         case InventoryLocation::PLAYER:
3371         {
3372                 Player *player = m_env->getPlayer(loc.name.c_str());
3373                 if(!player)
3374                         return;
3375                 PlayerSAO *playersao = player->getPlayerSAO();
3376                 if(!playersao)
3377                         return;
3378                 playersao->m_inventory_not_sent = true;
3379                 playersao->m_wielded_item_not_sent = true;
3380         }
3381         break;
3382         case InventoryLocation::NODEMETA:
3383         {
3384                 v3s16 blockpos = getNodeBlockPos(loc.p);
3385
3386                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3387                 if(block)
3388                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3389
3390                 setBlockNotSent(blockpos);
3391         }
3392         break;
3393         case InventoryLocation::DETACHED:
3394         {
3395                 sendDetachedInventoryToAll(loc.name);
3396         }
3397         break;
3398         default:
3399                 assert(0);
3400         }
3401 }
3402
3403 core::list<PlayerInfo> Server::getPlayerInfo()
3404 {
3405         DSTACK(__FUNCTION_NAME);
3406         JMutexAutoLock envlock(m_env_mutex);
3407         JMutexAutoLock conlock(m_con_mutex);
3408
3409         core::list<PlayerInfo> list;
3410
3411         core::list<Player*> players = m_env->getPlayers();
3412
3413         core::list<Player*>::Iterator i;
3414         for(i = players.begin();
3415                         i != players.end(); i++)
3416         {
3417                 PlayerInfo info;
3418
3419                 Player *player = *i;
3420
3421                 try{
3422                         // Copy info from connection to info struct
3423                         info.id = player->peer_id;
3424                         info.address = m_con.GetPeerAddress(player->peer_id);
3425                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3426                 }
3427                 catch(con::PeerNotFoundException &e)
3428                 {
3429                         // Set dummy peer info
3430                         info.id = 0;
3431                         info.address = Address(0,0,0,0,0);
3432                         info.avg_rtt = 0.0;
3433                 }
3434
3435                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3436                 info.position = player->getPosition();
3437
3438                 list.push_back(info);
3439         }
3440
3441         return list;
3442 }
3443
3444
3445 void Server::peerAdded(con::Peer *peer)
3446 {
3447         DSTACK(__FUNCTION_NAME);
3448         verbosestream<<"Server::peerAdded(): peer->id="
3449                         <<peer->id<<std::endl;
3450
3451         PeerChange c;
3452         c.type = PEER_ADDED;
3453         c.peer_id = peer->id;
3454         c.timeout = false;
3455         m_peer_change_queue.push_back(c);
3456 }
3457
3458 void Server::deletingPeer(con::Peer *peer, bool timeout)
3459 {
3460         DSTACK(__FUNCTION_NAME);
3461         verbosestream<<"Server::deletingPeer(): peer->id="
3462                         <<peer->id<<", timeout="<<timeout<<std::endl;
3463
3464         PeerChange c;
3465         c.type = PEER_REMOVED;
3466         c.peer_id = peer->id;
3467         c.timeout = timeout;
3468         m_peer_change_queue.push_back(c);
3469 }
3470
3471 /*
3472         Static send methods
3473 */
3474
3475 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3476 {
3477         DSTACK(__FUNCTION_NAME);
3478         std::ostringstream os(std::ios_base::binary);
3479
3480         writeU16(os, TOCLIENT_HP);
3481         writeU8(os, hp);
3482
3483         // Make data buffer
3484         std::string s = os.str();
3485         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3486         // Send as reliable
3487         con.Send(peer_id, 0, data, true);
3488 }
3489
3490 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3491                 const std::wstring &reason)
3492 {
3493         DSTACK(__FUNCTION_NAME);
3494         std::ostringstream os(std::ios_base::binary);
3495
3496         writeU16(os, TOCLIENT_ACCESS_DENIED);
3497         os<<serializeWideString(reason);
3498
3499         // Make data buffer
3500         std::string s = os.str();
3501         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3502         // Send as reliable
3503         con.Send(peer_id, 0, data, true);
3504 }
3505
3506 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3507                 bool set_camera_point_target, v3f camera_point_target)
3508 {
3509         DSTACK(__FUNCTION_NAME);
3510         std::ostringstream os(std::ios_base::binary);
3511
3512         writeU16(os, TOCLIENT_DEATHSCREEN);
3513         writeU8(os, set_camera_point_target);
3514         writeV3F1000(os, camera_point_target);
3515
3516         // Make data buffer
3517         std::string s = os.str();
3518         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3519         // Send as reliable
3520         con.Send(peer_id, 0, data, true);
3521 }
3522
3523 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3524                 IItemDefManager *itemdef)
3525 {
3526         DSTACK(__FUNCTION_NAME);
3527         std::ostringstream os(std::ios_base::binary);
3528
3529         /*
3530                 u16 command
3531                 u32 length of the next item
3532                 zlib-compressed serialized ItemDefManager
3533         */
3534         writeU16(os, TOCLIENT_ITEMDEF);
3535         std::ostringstream tmp_os(std::ios::binary);
3536         itemdef->serialize(tmp_os);
3537         std::ostringstream tmp_os2(std::ios::binary);
3538         compressZlib(tmp_os.str(), tmp_os2);
3539         os<<serializeLongString(tmp_os2.str());
3540
3541         // Make data buffer
3542         std::string s = os.str();
3543         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3544                         <<"): size="<<s.size()<<std::endl;
3545         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3546         // Send as reliable
3547         con.Send(peer_id, 0, data, true);
3548 }
3549
3550 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3551                 INodeDefManager *nodedef, u16 protocol_version)
3552 {
3553         DSTACK(__FUNCTION_NAME);
3554         std::ostringstream os(std::ios_base::binary);
3555
3556         /*
3557                 u16 command
3558                 u32 length of the next item
3559                 zlib-compressed serialized NodeDefManager
3560         */
3561         writeU16(os, TOCLIENT_NODEDEF);
3562         std::ostringstream tmp_os(std::ios::binary);
3563         nodedef->serialize(tmp_os, protocol_version);
3564         std::ostringstream tmp_os2(std::ios::binary);
3565         compressZlib(tmp_os.str(), tmp_os2);
3566         os<<serializeLongString(tmp_os2.str());
3567
3568         // Make data buffer
3569         std::string s = os.str();
3570         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3571                         <<"): size="<<s.size()<<std::endl;
3572         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3573         // Send as reliable
3574         con.Send(peer_id, 0, data, true);
3575 }
3576
3577 /*
3578         Non-static send methods
3579 */
3580
3581 void Server::SendInventory(u16 peer_id)
3582 {
3583         DSTACK(__FUNCTION_NAME);
3584
3585         PlayerSAO *playersao = getPlayerSAO(peer_id);
3586         assert(playersao);
3587
3588         playersao->m_inventory_not_sent = false;
3589
3590         /*
3591                 Serialize it
3592         */
3593
3594         std::ostringstream os;
3595         playersao->getInventory()->serialize(os);
3596
3597         std::string s = os.str();
3598
3599         SharedBuffer<u8> data(s.size()+2);
3600         writeU16(&data[0], TOCLIENT_INVENTORY);
3601         memcpy(&data[2], s.c_str(), s.size());
3602
3603         // Send as reliable
3604         m_con.Send(peer_id, 0, data, true);
3605 }
3606
3607 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3608 {
3609         DSTACK(__FUNCTION_NAME);
3610
3611         std::ostringstream os(std::ios_base::binary);
3612         u8 buf[12];
3613
3614         // Write command
3615         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3616         os.write((char*)buf, 2);
3617
3618         // Write length
3619         writeU16(buf, message.size());
3620         os.write((char*)buf, 2);
3621
3622         // Write string
3623         for(u32 i=0; i<message.size(); i++)
3624         {
3625                 u16 w = message[i];
3626                 writeU16(buf, w);
3627                 os.write((char*)buf, 2);
3628         }
3629
3630         // Make data buffer
3631         std::string s = os.str();
3632         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3633         // Send as reliable
3634         m_con.Send(peer_id, 0, data, true);
3635 }
3636
3637 void Server::BroadcastChatMessage(const std::wstring &message)
3638 {
3639         for(core::map<u16, RemoteClient*>::Iterator
3640                 i = m_clients.getIterator();
3641                 i.atEnd() == false; i++)
3642         {
3643                 // Get client and check that it is valid
3644                 RemoteClient *client = i.getNode()->getValue();
3645                 assert(client->peer_id == i.getNode()->getKey());
3646                 if(client->serialization_version == SER_FMT_VER_INVALID)
3647                         continue;
3648
3649                 SendChatMessage(client->peer_id, message);
3650         }
3651 }
3652
3653 void Server::SendPlayerHP(u16 peer_id)
3654 {
3655         DSTACK(__FUNCTION_NAME);
3656         PlayerSAO *playersao = getPlayerSAO(peer_id);
3657         assert(playersao);
3658         playersao->m_hp_not_sent = false;
3659         SendHP(m_con, peer_id, playersao->getHP());
3660 }
3661
3662 void Server::SendMovePlayer(u16 peer_id)
3663 {
3664         DSTACK(__FUNCTION_NAME);
3665         Player *player = m_env->getPlayer(peer_id);
3666         assert(player);
3667
3668         std::ostringstream os(std::ios_base::binary);
3669         writeU16(os, TOCLIENT_MOVE_PLAYER);
3670         writeV3F1000(os, player->getPosition());
3671         writeF1000(os, player->getPitch());
3672         writeF1000(os, player->getYaw());
3673
3674         {
3675                 v3f pos = player->getPosition();
3676                 f32 pitch = player->getPitch();
3677                 f32 yaw = player->getYaw();
3678                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3679                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3680                                 <<" pitch="<<pitch
3681                                 <<" yaw="<<yaw
3682                                 <<std::endl;
3683         }
3684
3685         // Make data buffer
3686         std::string s = os.str();
3687         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3688         // Send as reliable
3689         m_con.Send(peer_id, 0, data, true);
3690 }
3691
3692 void Server::SendPlayerPrivileges(u16 peer_id)
3693 {
3694         Player *player = m_env->getPlayer(peer_id);
3695         assert(player);
3696         if(player->peer_id == PEER_ID_INEXISTENT)
3697                 return;
3698
3699         std::set<std::string> privs;
3700         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3701
3702         std::ostringstream os(std::ios_base::binary);
3703         writeU16(os, TOCLIENT_PRIVILEGES);
3704         writeU16(os, privs.size());
3705         for(std::set<std::string>::const_iterator i = privs.begin();
3706                         i != privs.end(); i++){
3707                 os<<serializeString(*i);
3708         }
3709
3710         // Make data buffer
3711         std::string s = os.str();
3712         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3713         // Send as reliable
3714         m_con.Send(peer_id, 0, data, true);
3715 }
3716
3717 void Server::SendPlayerInventoryFormspec(u16 peer_id)
3718 {
3719         Player *player = m_env->getPlayer(peer_id);
3720         assert(player);
3721         if(player->peer_id == PEER_ID_INEXISTENT)
3722                 return;
3723
3724         std::ostringstream os(std::ios_base::binary);
3725         writeU16(os, TOCLIENT_INVENTORY_FORMSPEC);
3726         os<<serializeLongString(player->inventory_formspec);
3727
3728         // Make data buffer
3729         std::string s = os.str();
3730         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3731         // Send as reliable
3732         m_con.Send(peer_id, 0, data, true);
3733 }
3734
3735 s32 Server::playSound(const SimpleSoundSpec &spec,
3736                 const ServerSoundParams &params)
3737 {
3738         // Find out initial position of sound
3739         bool pos_exists = false;
3740         v3f pos = params.getPos(m_env, &pos_exists);
3741         // If position is not found while it should be, cancel sound
3742         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3743                 return -1;
3744         // Filter destination clients
3745         std::set<RemoteClient*> dst_clients;
3746         if(params.to_player != "")
3747         {
3748                 Player *player = m_env->getPlayer(params.to_player.c_str());
3749                 if(!player){
3750                         infostream<<"Server::playSound: Player \""<<params.to_player
3751                                         <<"\" not found"<<std::endl;
3752                         return -1;
3753                 }
3754                 if(player->peer_id == PEER_ID_INEXISTENT){
3755                         infostream<<"Server::playSound: Player \""<<params.to_player
3756                                         <<"\" not connected"<<std::endl;
3757                         return -1;
3758                 }
3759                 RemoteClient *client = getClient(player->peer_id);
3760                 dst_clients.insert(client);
3761         }
3762         else
3763         {
3764                 for(core::map<u16, RemoteClient*>::Iterator
3765                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3766                 {
3767                         RemoteClient *client = i.getNode()->getValue();
3768                         Player *player = m_env->getPlayer(client->peer_id);
3769                         if(!player)
3770                                 continue;
3771                         if(pos_exists){
3772                                 if(player->getPosition().getDistanceFrom(pos) >
3773                                                 params.max_hear_distance)
3774                                         continue;
3775                         }
3776                         dst_clients.insert(client);
3777                 }
3778         }
3779         if(dst_clients.size() == 0)
3780                 return -1;
3781         // Create the sound
3782         s32 id = m_next_sound_id++;
3783         // The sound will exist as a reference in m_playing_sounds
3784         m_playing_sounds[id] = ServerPlayingSound();
3785         ServerPlayingSound &psound = m_playing_sounds[id];
3786         psound.params = params;
3787         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3788                         i != dst_clients.end(); i++)
3789                 psound.clients.insert((*i)->peer_id);
3790         // Create packet
3791         std::ostringstream os(std::ios_base::binary);
3792         writeU16(os, TOCLIENT_PLAY_SOUND);
3793         writeS32(os, id);
3794         os<<serializeString(spec.name);
3795         writeF1000(os, spec.gain * params.gain);
3796         writeU8(os, params.type);
3797         writeV3F1000(os, pos);
3798         writeU16(os, params.object);
3799         writeU8(os, params.loop);
3800         // Make data buffer
3801         std::string s = os.str();
3802         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3803         // Send
3804         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3805                         i != dst_clients.end(); i++){
3806                 // Send as reliable
3807                 m_con.Send((*i)->peer_id, 0, data, true);
3808         }
3809         return id;
3810 }
3811 void Server::stopSound(s32 handle)
3812 {
3813         // Get sound reference
3814         std::map<s32, ServerPlayingSound>::iterator i =
3815                         m_playing_sounds.find(handle);
3816         if(i == m_playing_sounds.end())
3817                 return;
3818         ServerPlayingSound &psound = i->second;
3819         // Create packet
3820         std::ostringstream os(std::ios_base::binary);
3821         writeU16(os, TOCLIENT_STOP_SOUND);
3822         writeS32(os, handle);
3823         // Make data buffer
3824         std::string s = os.str();
3825         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3826         // Send
3827         for(std::set<u16>::iterator i = psound.clients.begin();
3828                         i != psound.clients.end(); i++){
3829                 // Send as reliable
3830                 m_con.Send(*i, 0, data, true);
3831         }
3832         // Remove sound reference
3833         m_playing_sounds.erase(i);
3834 }
3835
3836 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3837         core::list<u16> *far_players, float far_d_nodes)
3838 {
3839         float maxd = far_d_nodes*BS;
3840         v3f p_f = intToFloat(p, BS);
3841
3842         // Create packet
3843         u32 replysize = 8;
3844         SharedBuffer<u8> reply(replysize);
3845         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3846         writeS16(&reply[2], p.X);
3847         writeS16(&reply[4], p.Y);
3848         writeS16(&reply[6], p.Z);
3849
3850         for(core::map<u16, RemoteClient*>::Iterator
3851                 i = m_clients.getIterator();
3852                 i.atEnd() == false; i++)
3853         {
3854                 // Get client and check that it is valid
3855                 RemoteClient *client = i.getNode()->getValue();
3856                 assert(client->peer_id == i.getNode()->getKey());
3857                 if(client->serialization_version == SER_FMT_VER_INVALID)
3858                         continue;
3859
3860                 // Don't send if it's the same one
3861                 if(client->peer_id == ignore_id)
3862                         continue;
3863
3864                 if(far_players)
3865                 {
3866                         // Get player
3867                         Player *player = m_env->getPlayer(client->peer_id);
3868                         if(player)
3869                         {
3870                                 // If player is far away, only set modified blocks not sent
3871                                 v3f player_pos = player->getPosition();
3872                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3873                                 {
3874                                         far_players->push_back(client->peer_id);
3875                                         continue;
3876                                 }
3877                         }
3878                 }
3879
3880                 // Send as reliable
3881                 m_con.Send(client->peer_id, 0, reply, true);
3882         }
3883 }
3884
3885 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3886                 core::list<u16> *far_players, float far_d_nodes)
3887 {
3888         float maxd = far_d_nodes*BS;
3889         v3f p_f = intToFloat(p, BS);
3890
3891         for(core::map<u16, RemoteClient*>::Iterator
3892                 i = m_clients.getIterator();
3893                 i.atEnd() == false; i++)
3894         {
3895                 // Get client and check that it is valid
3896                 RemoteClient *client = i.getNode()->getValue();
3897                 assert(client->peer_id == i.getNode()->getKey());
3898                 if(client->serialization_version == SER_FMT_VER_INVALID)
3899                         continue;
3900
3901                 // Don't send if it's the same one
3902                 if(client->peer_id == ignore_id)
3903                         continue;
3904
3905                 if(far_players)
3906                 {
3907                         // Get player
3908                         Player *player = m_env->getPlayer(client->peer_id);
3909                         if(player)
3910                         {
3911                                 // If player is far away, only set modified blocks not sent
3912                                 v3f player_pos = player->getPosition();
3913                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3914                                 {
3915                                         far_players->push_back(client->peer_id);
3916                                         continue;
3917                                 }
3918                         }
3919                 }
3920
3921                 // Create packet
3922                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3923                 SharedBuffer<u8> reply(replysize);
3924                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3925                 writeS16(&reply[2], p.X);
3926                 writeS16(&reply[4], p.Y);
3927                 writeS16(&reply[6], p.Z);
3928                 n.serialize(&reply[8], client->serialization_version);
3929
3930                 // Send as reliable
3931                 m_con.Send(client->peer_id, 0, reply, true);
3932         }
3933 }
3934
3935 void Server::setBlockNotSent(v3s16 p)
3936 {
3937         for(core::map<u16, RemoteClient*>::Iterator
3938                 i = m_clients.getIterator();
3939                 i.atEnd()==false; i++)
3940         {
3941                 RemoteClient *client = i.getNode()->getValue();
3942                 client->SetBlockNotSent(p);
3943         }
3944 }
3945
3946 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3947 {
3948         DSTACK(__FUNCTION_NAME);
3949
3950         v3s16 p = block->getPos();
3951
3952 #if 0
3953         // Analyze it a bit
3954         bool completely_air = true;
3955         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3956         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3957         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3958         {
3959                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3960                 {
3961                         completely_air = false;
3962                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3963                 }
3964         }
3965
3966         // Print result
3967         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3968         if(completely_air)
3969                 infostream<<"[completely air] ";
3970         infostream<<std::endl;
3971 #endif
3972
3973         /*
3974                 Create a packet with the block in the right format
3975         */
3976
3977         std::ostringstream os(std::ios_base::binary);
3978         block->serialize(os, ver, false);
3979         std::string s = os.str();
3980         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3981
3982         u32 replysize = 8 + blockdata.getSize();
3983         SharedBuffer<u8> reply(replysize);
3984         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3985         writeS16(&reply[2], p.X);
3986         writeS16(&reply[4], p.Y);
3987         writeS16(&reply[6], p.Z);
3988         memcpy(&reply[8], *blockdata, blockdata.getSize());
3989
3990         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3991                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3992
3993         /*
3994                 Send packet
3995         */
3996         m_con.Send(peer_id, 1, reply, true);
3997 }
3998
3999 void Server::SendBlocks(float dtime)
4000 {
4001         DSTACK(__FUNCTION_NAME);
4002
4003         JMutexAutoLock envlock(m_env_mutex);
4004         JMutexAutoLock conlock(m_con_mutex);
4005
4006         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
4007
4008         core::array<PrioritySortedBlockTransfer> queue;
4009
4010         s32 total_sending = 0;
4011
4012         {
4013                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
4014
4015                 for(core::map<u16, RemoteClient*>::Iterator
4016                         i = m_clients.getIterator();
4017                         i.atEnd() == false; i++)
4018                 {
4019                         RemoteClient *client = i.getNode()->getValue();
4020                         assert(client->peer_id == i.getNode()->getKey());
4021
4022                         // If definitions and textures have not been sent, don't
4023                         // send MapBlocks either
4024                         if(!client->definitions_sent)
4025                                 continue;
4026
4027                         total_sending += client->SendingCount();
4028
4029                         if(client->serialization_version == SER_FMT_VER_INVALID)
4030                                 continue;
4031
4032                         client->GetNextBlocks(this, dtime, queue);
4033                 }
4034         }
4035
4036         // Sort.
4037         // Lowest priority number comes first.
4038         // Lowest is most important.
4039         queue.sort();
4040
4041         for(u32 i=0; i<queue.size(); i++)
4042         {
4043                 //TODO: Calculate limit dynamically
4044                 if(total_sending >= g_settings->getS32
4045                                 ("max_simultaneous_block_sends_server_total"))
4046                         break;
4047
4048                 PrioritySortedBlockTransfer q = queue[i];
4049
4050                 MapBlock *block = NULL;
4051                 try
4052                 {
4053                         block = m_env->getMap().getBlockNoCreate(q.pos);
4054                 }
4055                 catch(InvalidPositionException &e)
4056                 {
4057                         continue;
4058                 }
4059
4060                 RemoteClient *client = getClient(q.peer_id);
4061
4062                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
4063
4064                 client->SentBlock(q.pos);
4065
4066                 total_sending++;
4067         }
4068 }
4069
4070 void Server::fillMediaCache()
4071 {
4072         DSTACK(__FUNCTION_NAME);
4073
4074         infostream<<"Server: Calculating media file checksums"<<std::endl;
4075
4076         // Collect all media file paths
4077         std::list<std::string> paths;
4078         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4079                         i != m_mods.end(); i++){
4080                 const ModSpec &mod = *i;
4081                 paths.push_back(mod.path + DIR_DELIM + "textures");
4082                 paths.push_back(mod.path + DIR_DELIM + "sounds");
4083                 paths.push_back(mod.path + DIR_DELIM + "media");
4084                 paths.push_back(mod.path + DIR_DELIM + "models");
4085         }
4086         std::string path_all = "textures";
4087         paths.push_back(path_all + DIR_DELIM + "all");
4088
4089         // Collect media file information from paths into cache
4090         for(std::list<std::string>::iterator i = paths.begin();
4091                         i != paths.end(); i++)
4092         {
4093                 std::string mediapath = *i;
4094                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
4095                 for(u32 j=0; j<dirlist.size(); j++){
4096                         if(dirlist[j].dir) // Ignode dirs
4097                                 continue;
4098                         std::string filename = dirlist[j].name;
4099                         // If name contains illegal characters, ignore the file
4100                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
4101                                 infostream<<"Server: ignoring illegal file name: \""
4102                                                 <<filename<<"\""<<std::endl;
4103                                 continue;
4104                         }
4105                         // If name is not in a supported format, ignore it
4106                         const char *supported_ext[] = {
4107                                 ".png", ".jpg", ".bmp", ".tga",
4108                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
4109                                 ".ogg",
4110                                 ".x", ".b3d", ".md2", ".obj",
4111                                 NULL
4112                         };
4113                         if(removeStringEnd(filename, supported_ext) == ""){
4114                                 infostream<<"Server: ignoring unsupported file extension: \""
4115                                                 <<filename<<"\""<<std::endl;
4116                                 continue;
4117                         }
4118                         // Ok, attempt to load the file and add to cache
4119                         std::string filepath = mediapath + DIR_DELIM + filename;
4120                         // Read data
4121                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
4122                         if(fis.good() == false){
4123                                 errorstream<<"Server::fillMediaCache(): Could not open \""
4124                                                 <<filename<<"\" for reading"<<std::endl;
4125                                 continue;
4126                         }
4127                         std::ostringstream tmp_os(std::ios_base::binary);
4128                         bool bad = false;
4129                         for(;;){
4130                                 char buf[1024];
4131                                 fis.read(buf, 1024);
4132                                 std::streamsize len = fis.gcount();
4133                                 tmp_os.write(buf, len);
4134                                 if(fis.eof())
4135                                         break;
4136                                 if(!fis.good()){
4137                                         bad = true;
4138                                         break;
4139                                 }
4140                         }
4141                         if(bad){
4142                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
4143                                                 <<filename<<"\""<<std::endl;
4144                                 continue;
4145                         }
4146                         if(tmp_os.str().length() == 0){
4147                                 errorstream<<"Server::fillMediaCache(): Empty file \""
4148                                                 <<filepath<<"\""<<std::endl;
4149                                 continue;
4150                         }
4151
4152                         SHA1 sha1;
4153                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
4154
4155                         unsigned char *digest = sha1.getDigest();
4156                         std::string sha1_base64 = base64_encode(digest, 20);
4157                         std::string sha1_hex = hex_encode((char*)digest, 20);
4158                         free(digest);
4159
4160                         // Put in list
4161                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4162                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4163                 }
4164         }
4165 }
4166
4167 struct SendableMediaAnnouncement
4168 {
4169         std::string name;
4170         std::string sha1_digest;
4171
4172         SendableMediaAnnouncement(const std::string name_="",
4173                         const std::string sha1_digest_=""):
4174                 name(name_),
4175                 sha1_digest(sha1_digest_)
4176         {}
4177 };
4178
4179 void Server::sendMediaAnnouncement(u16 peer_id)
4180 {
4181         DSTACK(__FUNCTION_NAME);
4182
4183         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4184                         <<std::endl;
4185
4186         core::list<SendableMediaAnnouncement> file_announcements;
4187
4188         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4189                         i != m_media.end(); i++){
4190                 // Put in list
4191                 file_announcements.push_back(
4192                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4193         }
4194
4195         // Make packet
4196         std::ostringstream os(std::ios_base::binary);
4197
4198         /*
4199                 u16 command
4200                 u32 number of files
4201                 for each texture {
4202                         u16 length of name
4203                         string name
4204                         u16 length of sha1_digest
4205                         string sha1_digest
4206                 }
4207         */
4208
4209         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4210         writeU16(os, file_announcements.size());
4211
4212         for(core::list<SendableMediaAnnouncement>::Iterator
4213                         j = file_announcements.begin();
4214                         j != file_announcements.end(); j++){
4215                 os<<serializeString(j->name);
4216                 os<<serializeString(j->sha1_digest);
4217         }
4218
4219         // Make data buffer
4220         std::string s = os.str();
4221         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4222
4223         // Send as reliable
4224         m_con.Send(peer_id, 0, data, true);
4225
4226 }
4227
4228 struct SendableMedia
4229 {
4230         std::string name;
4231         std::string path;
4232         std::string data;
4233
4234         SendableMedia(const std::string &name_="", const std::string path_="",
4235                         const std::string &data_=""):
4236                 name(name_),
4237                 path(path_),
4238                 data(data_)
4239         {}
4240 };
4241
4242 void Server::sendRequestedMedia(u16 peer_id,
4243                 const core::list<MediaRequest> &tosend)
4244 {
4245         DSTACK(__FUNCTION_NAME);
4246
4247         verbosestream<<"Server::sendRequestedMedia(): "
4248                         <<"Sending files to client"<<std::endl;
4249
4250         /* Read files */
4251
4252         // Put 5kB in one bunch (this is not accurate)
4253         u32 bytes_per_bunch = 5000;
4254
4255         core::array< core::list<SendableMedia> > file_bunches;
4256         file_bunches.push_back(core::list<SendableMedia>());
4257
4258         u32 file_size_bunch_total = 0;
4259
4260         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4261                         i != tosend.end(); i++)
4262         {
4263                 if(m_media.find(i->name) == m_media.end()){
4264                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4265                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4266                         continue;
4267                 }
4268
4269                 //TODO get path + name
4270                 std::string tpath = m_media[(*i).name].path;
4271
4272                 // Read data
4273                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4274                 if(fis.good() == false){
4275                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4276                                         <<tpath<<"\" for reading"<<std::endl;
4277                         continue;
4278                 }
4279                 std::ostringstream tmp_os(std::ios_base::binary);
4280                 bool bad = false;
4281                 for(;;){
4282                         char buf[1024];
4283                         fis.read(buf, 1024);
4284                         std::streamsize len = fis.gcount();
4285                         tmp_os.write(buf, len);
4286                         file_size_bunch_total += len;
4287                         if(fis.eof())
4288                                 break;
4289                         if(!fis.good()){
4290                                 bad = true;
4291                                 break;
4292                         }
4293                 }
4294                 if(bad){
4295                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4296                                         <<(*i).name<<"\""<<std::endl;
4297                         continue;
4298                 }
4299                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4300                                 <<tname<<"\""<<std::endl;*/
4301                 // Put in list
4302                 file_bunches[file_bunches.size()-1].push_back(
4303                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4304
4305                 // Start next bunch if got enough data
4306                 if(file_size_bunch_total >= bytes_per_bunch){
4307                         file_bunches.push_back(core::list<SendableMedia>());
4308                         file_size_bunch_total = 0;
4309                 }
4310
4311         }
4312
4313         /* Create and send packets */
4314
4315         u32 num_bunches = file_bunches.size();
4316         for(u32 i=0; i<num_bunches; i++)
4317         {
4318                 std::ostringstream os(std::ios_base::binary);
4319
4320                 /*
4321                         u16 command
4322                         u16 total number of texture bunches
4323                         u16 index of this bunch
4324                         u32 number of files in this bunch
4325                         for each file {
4326                                 u16 length of name
4327                                 string name
4328                                 u32 length of data
4329                                 data
4330                         }
4331                 */
4332
4333                 writeU16(os, TOCLIENT_MEDIA);
4334                 writeU16(os, num_bunches);
4335                 writeU16(os, i);
4336                 writeU32(os, file_bunches[i].size());
4337
4338                 for(core::list<SendableMedia>::Iterator
4339                                 j = file_bunches[i].begin();
4340                                 j != file_bunches[i].end(); j++){
4341                         os<<serializeString(j->name);
4342                         os<<serializeLongString(j->data);
4343                 }
4344
4345                 // Make data buffer
4346                 std::string s = os.str();
4347                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4348                                 <<i<<"/"<<num_bunches
4349                                 <<" files="<<file_bunches[i].size()
4350                                 <<" size=" <<s.size()<<std::endl;
4351                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4352                 // Send as reliable
4353                 m_con.Send(peer_id, 0, data, true);
4354         }
4355 }
4356
4357 void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
4358 {
4359         if(m_detached_inventories.count(name) == 0){
4360                 errorstream<<__FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
4361                 return;
4362         }
4363         Inventory *inv = m_detached_inventories[name];
4364
4365         std::ostringstream os(std::ios_base::binary);
4366         writeU16(os, TOCLIENT_DETACHED_INVENTORY);
4367         os<<serializeString(name);
4368         inv->serialize(os);
4369
4370         // Make data buffer
4371         std::string s = os.str();
4372         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4373         // Send as reliable
4374         m_con.Send(peer_id, 0, data, true);
4375 }
4376
4377 void Server::sendDetachedInventoryToAll(const std::string &name)
4378 {
4379         DSTACK(__FUNCTION_NAME);
4380
4381         for(core::map<u16, RemoteClient*>::Iterator
4382                         i = m_clients.getIterator();
4383                         i.atEnd() == false; i++){
4384                 RemoteClient *client = i.getNode()->getValue();
4385                 sendDetachedInventory(name, client->peer_id);
4386         }
4387 }
4388
4389 void Server::sendDetachedInventories(u16 peer_id)
4390 {
4391         DSTACK(__FUNCTION_NAME);
4392
4393         for(std::map<std::string, Inventory*>::iterator
4394                         i = m_detached_inventories.begin();
4395                         i != m_detached_inventories.end(); i++){
4396                 const std::string &name = i->first;
4397                 //Inventory *inv = i->second;
4398                 sendDetachedInventory(name, peer_id);
4399         }
4400 }
4401
4402 /*
4403         Something random
4404 */
4405
4406 void Server::DiePlayer(u16 peer_id)
4407 {
4408         DSTACK(__FUNCTION_NAME);
4409
4410         PlayerSAO *playersao = getPlayerSAO(peer_id);
4411         assert(playersao);
4412
4413         infostream<<"Server::DiePlayer(): Player "
4414                         <<playersao->getPlayer()->getName()
4415                         <<" dies"<<std::endl;
4416
4417         playersao->setHP(0);
4418
4419         // Trigger scripted stuff
4420         scriptapi_on_dieplayer(m_lua, playersao);
4421
4422         SendPlayerHP(peer_id);
4423         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4424 }
4425
4426 void Server::RespawnPlayer(u16 peer_id)
4427 {
4428         DSTACK(__FUNCTION_NAME);
4429
4430         PlayerSAO *playersao = getPlayerSAO(peer_id);
4431         assert(playersao);
4432
4433         infostream<<"Server::RespawnPlayer(): Player "
4434                         <<playersao->getPlayer()->getName()
4435                         <<" respawns"<<std::endl;
4436
4437         playersao->setHP(PLAYER_MAX_HP);
4438
4439         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4440         if(!repositioned){
4441                 v3f pos = findSpawnPos(m_env->getServerMap());
4442                 playersao->setPos(pos);
4443         }
4444 }
4445
4446 void Server::UpdateCrafting(u16 peer_id)
4447 {
4448         DSTACK(__FUNCTION_NAME);
4449
4450         Player* player = m_env->getPlayer(peer_id);
4451         assert(player);
4452
4453         // Get a preview for crafting
4454         ItemStack preview;
4455         getCraftingResult(&player->inventory, preview, false, this);
4456
4457         // Put the new preview in
4458         InventoryList *plist = player->inventory.getList("craftpreview");
4459         assert(plist);
4460         assert(plist->getSize() >= 1);
4461         plist->changeItem(0, preview);
4462 }
4463
4464 RemoteClient* Server::getClient(u16 peer_id)
4465 {
4466         DSTACK(__FUNCTION_NAME);
4467         //JMutexAutoLock lock(m_con_mutex);
4468         core::map<u16, RemoteClient*>::Node *n;
4469         n = m_clients.find(peer_id);
4470         // A client should exist for all peers
4471         assert(n != NULL);
4472         return n->getValue();
4473 }
4474
4475 std::wstring Server::getStatusString()
4476 {
4477         std::wostringstream os(std::ios_base::binary);
4478         os<<L"# Server: ";
4479         // Version
4480         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4481         // Uptime
4482         os<<L", uptime="<<m_uptime.get();
4483         // Information about clients
4484         core::map<u16, RemoteClient*>::Iterator i;
4485         bool first;
4486         os<<L", clients={";
4487         for(i = m_clients.getIterator(), first = true;
4488                 i.atEnd() == false; i++)
4489         {
4490                 // Get client and check that it is valid
4491                 RemoteClient *client = i.getNode()->getValue();
4492                 assert(client->peer_id == i.getNode()->getKey());
4493                 if(client->serialization_version == SER_FMT_VER_INVALID)
4494                         continue;
4495                 // Get player
4496                 Player *player = m_env->getPlayer(client->peer_id);
4497                 // Get name of player
4498                 std::wstring name = L"unknown";
4499                 if(player != NULL)
4500                         name = narrow_to_wide(player->getName());
4501                 // Add name to information string
4502                 if(!first)
4503                         os<<L",";
4504                 else
4505                         first = false;
4506                 os<<name;
4507         }
4508         os<<L"}";
4509         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4510                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4511         if(g_settings->get("motd") != "")
4512                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4513         return os.str();
4514 }
4515
4516 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4517 {
4518         std::set<std::string> privs;
4519         scriptapi_get_auth(m_lua, name, NULL, &privs);
4520         return privs;
4521 }
4522
4523 bool Server::checkPriv(const std::string &name, const std::string &priv)
4524 {
4525         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4526         return (privs.count(priv) != 0);
4527 }
4528
4529 void Server::reportPrivsModified(const std::string &name)
4530 {
4531         if(name == ""){
4532                 for(core::map<u16, RemoteClient*>::Iterator
4533                                 i = m_clients.getIterator();
4534                                 i.atEnd() == false; i++){
4535                         RemoteClient *client = i.getNode()->getValue();
4536                         Player *player = m_env->getPlayer(client->peer_id);
4537                         reportPrivsModified(player->getName());
4538                 }
4539         } else {
4540                 Player *player = m_env->getPlayer(name.c_str());
4541                 if(!player)
4542                         return;
4543                 SendPlayerPrivileges(player->peer_id);
4544                 PlayerSAO *sao = player->getPlayerSAO();
4545                 if(!sao)
4546                         return;
4547                 sao->updatePrivileges(
4548                                 getPlayerEffectivePrivs(name),
4549                                 isSingleplayer());
4550         }
4551 }
4552
4553 void Server::reportInventoryFormspecModified(const std::string &name)
4554 {
4555         Player *player = m_env->getPlayer(name.c_str());
4556         if(!player)
4557                 return;
4558         SendPlayerInventoryFormspec(player->peer_id);
4559 }
4560
4561 // Saves g_settings to configpath given at initialization
4562 void Server::saveConfig()
4563 {
4564         if(m_path_config != "")
4565                 g_settings->updateConfigFile(m_path_config.c_str());
4566 }
4567
4568 void Server::notifyPlayer(const char *name, const std::wstring msg)
4569 {
4570         Player *player = m_env->getPlayer(name);
4571         if(!player)
4572                 return;
4573         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4574 }
4575
4576 void Server::notifyPlayers(const std::wstring msg)
4577 {
4578         BroadcastChatMessage(msg);
4579 }
4580
4581 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4582 {
4583         u8 flags = 0;
4584         if(!allow_generate)
4585                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4586         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4587 }
4588
4589 Inventory* Server::createDetachedInventory(const std::string &name)
4590 {
4591         if(m_detached_inventories.count(name) > 0){
4592                 infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
4593                 delete m_detached_inventories[name];
4594         } else {
4595                 infostream<<"Server creating detached inventory \""<<name<<"\""<<std::endl;
4596         }
4597         Inventory *inv = new Inventory(m_itemdef);
4598         assert(inv);
4599         m_detached_inventories[name] = inv;
4600         sendDetachedInventoryToAll(name);
4601         return inv;
4602 }
4603
4604 class BoolScopeSet
4605 {
4606 public:
4607         BoolScopeSet(bool *dst, bool val):
4608                 m_dst(dst)
4609         {
4610                 m_orig_state = *m_dst;
4611                 *m_dst = val;
4612         }
4613         ~BoolScopeSet()
4614         {
4615                 *m_dst = m_orig_state;
4616         }
4617 private:
4618         bool *m_dst;
4619         bool m_orig_state;
4620 };
4621
4622 // actions: time-reversed list
4623 // Return value: success/failure
4624 bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
4625                 std::list<std::string> *log)
4626 {
4627         infostream<<"Server::rollbackRevertActions(len="<<actions.size()<<")"<<std::endl;
4628         ServerMap *map = (ServerMap*)(&m_env->getMap());
4629         // Disable rollback report sink while reverting
4630         BoolScopeSet rollback_scope_disable(&m_rollback_sink_enabled, false);
4631
4632         // Fail if no actions to handle
4633         if(actions.empty()){
4634                 log->push_back("Nothing to do.");
4635                 return false;
4636         }
4637
4638         int num_tried = 0;
4639         int num_failed = 0;
4640
4641         for(std::list<RollbackAction>::const_iterator
4642                         i = actions.begin();
4643                         i != actions.end(); i++)
4644         {
4645                 const RollbackAction &action = *i;
4646                 num_tried++;
4647                 bool success = action.applyRevert(map, this, this);
4648                 if(!success){
4649                         num_failed++;
4650                         std::ostringstream os;
4651                         os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
4652                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4653                         if(log)
4654                                 log->push_back(os.str());
4655                 }else{
4656                         std::ostringstream os;
4657                         os<<"Succesfully reverted step ("<<num_tried<<") "<<action.toString();
4658                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4659                         if(log)
4660                                 log->push_back(os.str());
4661                 }
4662         }
4663
4664         infostream<<"Map::rollbackRevertActions(): "<<num_failed<<"/"<<num_tried
4665                         <<" failed"<<std::endl;
4666
4667         // Call it done if less than half failed
4668         return num_failed <= num_tried/2;
4669 }
4670
4671 // IGameDef interface
4672 // Under envlock
4673 IItemDefManager* Server::getItemDefManager()
4674 {
4675         return m_itemdef;
4676 }
4677 INodeDefManager* Server::getNodeDefManager()
4678 {
4679         return m_nodedef;
4680 }
4681 ICraftDefManager* Server::getCraftDefManager()
4682 {
4683         return m_craftdef;
4684 }
4685 ITextureSource* Server::getTextureSource()
4686 {
4687         return NULL;
4688 }
4689 u16 Server::allocateUnknownNodeId(const std::string &name)
4690 {
4691         return m_nodedef->allocateDummy(name);
4692 }
4693 ISoundManager* Server::getSoundManager()
4694 {
4695         return &dummySoundManager;
4696 }
4697 MtEventManager* Server::getEventManager()
4698 {
4699         return m_event;
4700 }
4701 IRollbackReportSink* Server::getRollbackReportSink()
4702 {
4703         if(!m_enable_rollback_recording)
4704                 return NULL;
4705         if(!m_rollback_sink_enabled)
4706                 return NULL;
4707         return m_rollback;
4708 }
4709
4710 IWritableItemDefManager* Server::getWritableItemDefManager()
4711 {
4712         return m_itemdef;
4713 }
4714 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4715 {
4716         return m_nodedef;
4717 }
4718 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4719 {
4720         return m_craftdef;
4721 }
4722
4723 const ModSpec* Server::getModSpec(const std::string &modname)
4724 {
4725         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4726                         i != m_mods.end(); i++){
4727                 const ModSpec &mod = *i;
4728                 if(mod.name == modname)
4729                         return &mod;
4730         }
4731         return NULL;
4732 }
4733 void Server::getModNames(core::list<std::string> &modlist)
4734 {
4735         for(core::list<ModSpec>::Iterator i = m_mods.begin(); i != m_mods.end(); i++)
4736         {
4737                 modlist.push_back((*i).name);
4738         }
4739 }
4740 std::string Server::getBuiltinLuaPath()
4741 {
4742         return porting::path_share + DIR_DELIM + "builtin";
4743 }
4744
4745 v3f findSpawnPos(ServerMap &map)
4746 {
4747         //return v3f(50,50,50)*BS;
4748
4749         v3s16 nodepos;
4750
4751 #if 0
4752         nodepos = v2s16(0,0);
4753         groundheight = 20;
4754 #endif
4755
4756 #if 1
4757         // Try to find a good place a few times
4758         for(s32 i=0; i<1000; i++)
4759         {
4760                 s32 range = 1 + i;
4761                 // We're going to try to throw the player to this position
4762                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4763                                 -range + (myrand()%(range*2)));
4764                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4765                 // Get ground height at point (fallbacks to heightmap function)
4766                 s16 groundheight = map.findGroundLevel(nodepos2d);
4767                 // Don't go underwater
4768                 if(groundheight < WATER_LEVEL)
4769                 {
4770                         //infostream<<"-> Underwater"<<std::endl;
4771                         continue;
4772                 }
4773                 // Don't go to high places
4774                 if(groundheight > WATER_LEVEL + 4)
4775                 {
4776                         //infostream<<"-> Underwater"<<std::endl;
4777                         continue;
4778                 }
4779
4780                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4781                 bool is_good = false;
4782                 s32 air_count = 0;
4783                 for(s32 i=0; i<10; i++){
4784                         v3s16 blockpos = getNodeBlockPos(nodepos);
4785                         map.emergeBlock(blockpos, true);
4786                         MapNode n = map.getNodeNoEx(nodepos);
4787                         if(n.getContent() == CONTENT_AIR){
4788                                 air_count++;
4789                                 if(air_count >= 2){
4790                                         is_good = true;
4791                                         nodepos.Y -= 1;
4792                                         break;
4793                                 }
4794                         }
4795                         nodepos.Y++;
4796                 }
4797                 if(is_good){
4798                         // Found a good place
4799                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4800                         break;
4801                 }
4802         }
4803 #endif
4804
4805         return intToFloat(nodepos, BS);
4806 }
4807
4808 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4809 {
4810         RemotePlayer *player = NULL;
4811         bool newplayer = false;
4812
4813         /*
4814                 Try to get an existing player
4815         */
4816         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4817
4818         // If player is already connected, cancel
4819         if(player != NULL && player->peer_id != 0)
4820         {
4821                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4822                 return NULL;
4823         }
4824
4825         /*
4826                 If player with the wanted peer_id already exists, cancel.
4827         */
4828         if(m_env->getPlayer(peer_id) != NULL)
4829         {
4830                 infostream<<"emergePlayer(): Player with wrong name but same"
4831                                 " peer_id already exists"<<std::endl;
4832                 return NULL;
4833         }
4834
4835         /*
4836                 Create a new player if it doesn't exist yet
4837         */
4838         if(player == NULL)
4839         {
4840                 newplayer = true;
4841                 player = new RemotePlayer(this);
4842                 player->updateName(name);
4843
4844                 /* Set player position */
4845                 infostream<<"Server: Finding spawn place for player \""
4846                                 <<name<<"\""<<std::endl;
4847                 v3f pos = findSpawnPos(m_env->getServerMap());
4848                 player->setPosition(pos);
4849
4850                 /* Add player to environment */
4851                 m_env->addPlayer(player);
4852         }
4853
4854         /*
4855                 Create a new player active object
4856         */
4857         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4858                         getPlayerEffectivePrivs(player->getName()),
4859                         isSingleplayer());
4860
4861         /* Add object to environment */
4862         m_env->addActiveObject(playersao);
4863
4864         /* Run scripts */
4865         if(newplayer)
4866                 scriptapi_on_newplayer(m_lua, playersao);
4867
4868         scriptapi_on_joinplayer(m_lua, playersao);
4869
4870         return playersao;
4871 }
4872
4873 void Server::handlePeerChange(PeerChange &c)
4874 {
4875         JMutexAutoLock envlock(m_env_mutex);
4876         JMutexAutoLock conlock(m_con_mutex);
4877
4878         if(c.type == PEER_ADDED)
4879         {
4880                 /*
4881                         Add
4882                 */
4883
4884                 // Error check
4885                 core::map<u16, RemoteClient*>::Node *n;
4886                 n = m_clients.find(c.peer_id);
4887                 // The client shouldn't already exist
4888                 assert(n == NULL);
4889
4890                 // Create client
4891                 RemoteClient *client = new RemoteClient();
4892                 client->peer_id = c.peer_id;
4893                 m_clients.insert(client->peer_id, client);
4894
4895         } // PEER_ADDED
4896         else if(c.type == PEER_REMOVED)
4897         {
4898                 /*
4899                         Delete
4900                 */
4901
4902                 // Error check
4903                 core::map<u16, RemoteClient*>::Node *n;
4904                 n = m_clients.find(c.peer_id);
4905                 // The client should exist
4906                 assert(n != NULL);
4907
4908                 /*
4909                         Mark objects to be not known by the client
4910                 */
4911                 RemoteClient *client = n->getValue();
4912                 // Handle objects
4913                 for(core::map<u16, bool>::Iterator
4914                                 i = client->m_known_objects.getIterator();
4915                                 i.atEnd()==false; i++)
4916                 {
4917                         // Get object
4918                         u16 id = i.getNode()->getKey();
4919                         ServerActiveObject* obj = m_env->getActiveObject(id);
4920
4921                         if(obj && obj->m_known_by_count > 0)
4922                                 obj->m_known_by_count--;
4923                 }
4924
4925                 /*
4926                         Clear references to playing sounds
4927                 */
4928                 for(std::map<s32, ServerPlayingSound>::iterator
4929                                 i = m_playing_sounds.begin();
4930                                 i != m_playing_sounds.end();)
4931                 {
4932                         ServerPlayingSound &psound = i->second;
4933                         psound.clients.erase(c.peer_id);
4934                         if(psound.clients.size() == 0)
4935                                 m_playing_sounds.erase(i++);
4936                         else
4937                                 i++;
4938                 }
4939
4940                 Player *player = m_env->getPlayer(c.peer_id);
4941
4942                 // Collect information about leaving in chat
4943                 std::wstring message;
4944                 {
4945                         if(player != NULL)
4946                         {
4947                                 std::wstring name = narrow_to_wide(player->getName());
4948                                 message += L"*** ";
4949                                 message += name;
4950                                 message += L" left the game.";
4951                                 if(c.timeout)
4952                                         message += L" (timed out)";
4953                         }
4954                 }
4955
4956                 /* Run scripts and remove from environment */
4957                 {
4958                         if(player != NULL)
4959                         {
4960                                 PlayerSAO *playersao = player->getPlayerSAO();
4961                                 assert(playersao);
4962
4963                                 scriptapi_on_leaveplayer(m_lua, playersao);
4964
4965                                 playersao->disconnected();
4966                         }
4967                 }
4968
4969                 /*
4970                         Print out action
4971                 */
4972                 {
4973                         if(player != NULL)
4974                         {
4975                                 std::ostringstream os(std::ios_base::binary);
4976                                 for(core::map<u16, RemoteClient*>::Iterator
4977                                         i = m_clients.getIterator();
4978                                         i.atEnd() == false; i++)
4979                                 {
4980                                         RemoteClient *client = i.getNode()->getValue();
4981                                         assert(client->peer_id == i.getNode()->getKey());
4982                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4983                                                 continue;
4984                                         // Get player
4985                                         Player *player = m_env->getPlayer(client->peer_id);
4986                                         if(!player)
4987                                                 continue;
4988                                         // Get name of player
4989                                         os<<player->getName()<<" ";
4990                                 }
4991
4992                                 actionstream<<player->getName()<<" "
4993                                                 <<(c.timeout?"times out.":"leaves game.")
4994                                                 <<" List of players: "
4995                                                 <<os.str()<<std::endl;
4996                         }
4997                 }
4998
4999                 // Delete client
5000                 delete m_clients[c.peer_id];
5001                 m_clients.remove(c.peer_id);
5002
5003                 // Send player info to all remaining clients
5004                 //SendPlayerInfos();
5005
5006                 // Send leave chat message to all remaining clients
5007                 if(message.length() != 0)
5008                         BroadcastChatMessage(message);
5009
5010         } // PEER_REMOVED
5011         else
5012         {
5013                 assert(0);
5014         }
5015 }
5016
5017 void Server::handlePeerChanges()
5018 {
5019         while(m_peer_change_queue.size() > 0)
5020         {
5021                 PeerChange c = m_peer_change_queue.pop_front();
5022
5023                 verbosestream<<"Server: Handling peer change: "
5024                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
5025                                 <<std::endl;
5026
5027                 handlePeerChange(c);
5028         }
5029 }
5030
5031 void dedicated_server_loop(Server &server, bool &kill)
5032 {
5033         DSTACK(__FUNCTION_NAME);
5034
5035         verbosestream<<"dedicated_server_loop()"<<std::endl;
5036
5037         IntervalLimiter m_profiler_interval;
5038
5039         for(;;)
5040         {
5041                 float steplen = g_settings->getFloat("dedicated_server_step");
5042                 // This is kind of a hack but can be done like this
5043                 // because server.step() is very light
5044                 {
5045                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
5046                         sleep_ms((int)(steplen*1000.0));
5047                 }
5048                 server.step(steplen);
5049
5050                 if(server.getShutdownRequested() || kill)
5051                 {
5052                         infostream<<"Dedicated server quitting"<<std::endl;
5053                         break;
5054                 }
5055
5056                 /*
5057                         Profiler
5058                 */
5059                 float profiler_print_interval =
5060                                 g_settings->getFloat("profiler_print_interval");
5061                 if(profiler_print_interval != 0)
5062                 {
5063                         if(m_profiler_interval.step(steplen, profiler_print_interval))
5064                         {
5065                                 infostream<<"Profiler:"<<std::endl;
5066                                 g_profiler->print(infostream);
5067                                 g_profiler->clear();
5068                         }
5069                 }
5070         }
5071 }
5072
5073