src/server.cpp

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