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                 Execute script shutdown hooks
1118         */
1119         scriptapi_on_shutdown(m_lua);
1120
1121         {
1122                 JMutexAutoLock envlock(m_env_mutex);
1123
1124                 /*
1125                         Save players
1126                 */
1127                 infostream<<"Server: Saving players"<<std::endl;
1128                 m_env->serializePlayers(m_path_world);
1129
1130                 /*
1131                         Save environment metadata
1132                 */
1133                 infostream<<"Server: Saving environment metadata"<<std::endl;
1134                 m_env->saveMeta(m_path_world);
1135         }
1136
1137         /*
1138                 Stop threads
1139         */
1140         stop();
1141
1142         /*
1143                 Delete clients
1144         */
1145         {
1146                 JMutexAutoLock clientslock(m_con_mutex);
1147
1148                 for(core::map<u16, RemoteClient*>::Iterator
1149                         i = m_clients.getIterator();
1150                         i.atEnd() == false; i++)
1151                 {
1152                         /*// Delete player
1153                         // NOTE: These are removed by env destructor
1154                         {
1155                                 u16 peer_id = i.getNode()->getKey();
1156                                 JMutexAutoLock envlock(m_env_mutex);
1157                                 m_env->removePlayer(peer_id);
1158                         }*/
1159
1160                         // Delete client
1161                         delete i.getNode()->getValue();
1162                 }
1163         }
1164
1165         // Delete things in the reverse order of creation
1166         delete m_env;
1167         delete m_rollback;
1168         delete m_event;
1169         delete m_itemdef;
1170         delete m_nodedef;
1171         delete m_craftdef;
1172
1173         // Deinitialize scripting
1174         infostream<<"Server: Deinitializing scripting"<<std::endl;
1175         script_deinit(m_lua);
1176
1177         // Delete detached inventories
1178         {
1179                 for(std::map<std::string, Inventory*>::iterator
1180                                 i = m_detached_inventories.begin();
1181                                 i != m_detached_inventories.end(); i++){
1182                         delete i->second;
1183                 }
1184         }
1185 }
1186
1187 void Server::start(unsigned short port)
1188 {
1189         DSTACK(__FUNCTION_NAME);
1190         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1191
1192         // Stop thread if already running
1193         m_thread.stop();
1194
1195         // Initialize connection
1196         m_con.SetTimeoutMs(30);
1197         m_con.Serve(port);
1198
1199         // Start thread
1200         m_thread.setRun(true);
1201         m_thread.Start();
1202
1203         // ASCII art for the win!
1204         actionstream
1205         <<"        .__               __                   __   "<<std::endl
1206         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1207         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1208         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1209         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1210         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1211         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1212         actionstream<<"Server for gameid=\""<<m_gamespec.id
1213                         <<"\" listening on port "<<port<<"."<<std::endl;
1214 }
1215
1216 void Server::stop()
1217 {
1218         DSTACK(__FUNCTION_NAME);
1219
1220         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1221
1222         // Stop threads (set run=false first so both start stopping)
1223         m_thread.setRun(false);
1224         m_emergethread.setRun(false);
1225         m_thread.stop();
1226         m_emergethread.stop();
1227
1228         infostream<<"Server: Threads stopped"<<std::endl;
1229 }
1230
1231 void Server::step(float dtime)
1232 {
1233         DSTACK(__FUNCTION_NAME);
1234         // Limit a bit
1235         if(dtime > 2.0)
1236                 dtime = 2.0;
1237         {
1238                 JMutexAutoLock lock(m_step_dtime_mutex);
1239                 m_step_dtime += dtime;
1240         }
1241         // Throw if fatal error occurred in thread
1242         std::string async_err = m_async_fatal_error.get();
1243         if(async_err != ""){
1244                 throw ServerError(async_err);
1245         }
1246 }
1247
1248 void Server::AsyncRunStep()
1249 {
1250         DSTACK(__FUNCTION_NAME);
1251
1252         g_profiler->add("Server::AsyncRunStep (num)", 1);
1253
1254         float dtime;
1255         {
1256                 JMutexAutoLock lock1(m_step_dtime_mutex);
1257                 dtime = m_step_dtime;
1258         }
1259
1260         {
1261                 // Send blocks to clients
1262                 SendBlocks(dtime);
1263         }
1264
1265         if(dtime < 0.001)
1266                 return;
1267
1268         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1269
1270         //infostream<<"Server steps "<<dtime<<std::endl;
1271         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1272
1273         {
1274                 JMutexAutoLock lock1(m_step_dtime_mutex);
1275                 m_step_dtime -= dtime;
1276         }
1277
1278         /*
1279                 Update uptime
1280         */
1281         {
1282                 m_uptime.set(m_uptime.get() + dtime);
1283         }
1284
1285         {
1286                 // Process connection's timeouts
1287                 JMutexAutoLock lock2(m_con_mutex);
1288                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1289                 m_con.RunTimeouts(dtime);
1290         }
1291
1292         {
1293                 // This has to be called so that the client list gets synced
1294                 // with the peer list of the connection
1295                 handlePeerChanges();
1296         }
1297
1298         /*
1299                 Update time of day and overall game time
1300         */
1301         {
1302                 JMutexAutoLock envlock(m_env_mutex);
1303
1304                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1305
1306                 /*
1307                         Send to clients at constant intervals
1308                 */
1309
1310                 m_time_of_day_send_timer -= dtime;
1311                 if(m_time_of_day_send_timer < 0.0)
1312                 {
1313                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1314
1315                         //JMutexAutoLock envlock(m_env_mutex);
1316                         JMutexAutoLock conlock(m_con_mutex);
1317
1318                         for(core::map<u16, RemoteClient*>::Iterator
1319                                 i = m_clients.getIterator();
1320                                 i.atEnd() == false; i++)
1321                         {
1322                                 RemoteClient *client = i.getNode()->getValue();
1323                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1324                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1325                                 // Send as reliable
1326                                 m_con.Send(client->peer_id, 0, data, true);
1327                         }
1328                 }
1329         }
1330
1331         {
1332                 JMutexAutoLock lock(m_env_mutex);
1333                 // Step environment
1334                 ScopeProfiler sp(g_profiler, "SEnv step");
1335                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1336                 m_env->step(dtime);
1337         }
1338
1339         const float map_timer_and_unload_dtime = 2.92;
1340         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1341         {
1342                 JMutexAutoLock lock(m_env_mutex);
1343                 // Run Map's timers and unload unused data
1344                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1345                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1346                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1347         }
1348
1349         /*
1350                 Do background stuff
1351         */
1352
1353         /*
1354                 Handle players
1355         */
1356         {
1357                 JMutexAutoLock lock(m_env_mutex);
1358                 JMutexAutoLock lock2(m_con_mutex);
1359
1360                 ScopeProfiler sp(g_profiler, "Server: handle players");
1361
1362                 for(core::map<u16, RemoteClient*>::Iterator
1363                         i = m_clients.getIterator();
1364                         i.atEnd() == false; i++)
1365                 {
1366                         RemoteClient *client = i.getNode()->getValue();
1367                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1368                         if(playersao == NULL)
1369                                 continue;
1370
1371                         /*
1372                                 Handle player HPs (die if hp=0)
1373                         */
1374                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1375                                 DiePlayer(client->peer_id);
1376
1377                         /*
1378                                 Send player inventories and HPs if necessary
1379                         */
1380                         if(playersao->m_moved){
1381                                 SendMovePlayer(client->peer_id);
1382                                 playersao->m_moved = false;
1383                         }
1384                         if(playersao->m_inventory_not_sent){
1385                                 UpdateCrafting(client->peer_id);
1386                                 SendInventory(client->peer_id);
1387                         }
1388                         if(playersao->m_hp_not_sent){
1389                                 SendPlayerHP(client->peer_id);
1390                         }
1391                 }
1392         }
1393
1394         /* Transform liquids */
1395         m_liquid_transform_timer += dtime;
1396         if(m_liquid_transform_timer >= 1.00)
1397         {
1398                 m_liquid_transform_timer -= 1.00;
1399
1400                 JMutexAutoLock lock(m_env_mutex);
1401
1402                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1403
1404                 core::map<v3s16, MapBlock*> modified_blocks;
1405                 m_env->getMap().transformLiquids(modified_blocks);
1406 #if 0
1407                 /*
1408                         Update lighting
1409                 */
1410                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1411                 ServerMap &map = ((ServerMap&)m_env->getMap());
1412                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1413
1414                 // Add blocks modified by lighting to modified_blocks
1415                 for(core::map<v3s16, MapBlock*>::Iterator
1416                                 i = lighting_modified_blocks.getIterator();
1417                                 i.atEnd() == false; i++)
1418                 {
1419                         MapBlock *block = i.getNode()->getValue();
1420                         modified_blocks.insert(block->getPos(), block);
1421                 }
1422 #endif
1423                 /*
1424                         Set the modified blocks unsent for all the clients
1425                 */
1426
1427                 JMutexAutoLock lock2(m_con_mutex);
1428
1429                 for(core::map<u16, RemoteClient*>::Iterator
1430                                 i = m_clients.getIterator();
1431                                 i.atEnd() == false; i++)
1432                 {
1433                         RemoteClient *client = i.getNode()->getValue();
1434
1435                         if(modified_blocks.size() > 0)
1436                         {
1437                                 // Remove block from sent history
1438                                 client->SetBlocksNotSent(modified_blocks);
1439                         }
1440                 }
1441         }
1442
1443         // Periodically print some info
1444         {
1445                 float &counter = m_print_info_timer;
1446                 counter += dtime;
1447                 if(counter >= 30.0)
1448                 {
1449                         counter = 0.0;
1450
1451                         JMutexAutoLock lock2(m_con_mutex);
1452
1453                         if(m_clients.size() != 0)
1454                                 infostream<<"Players:"<<std::endl;
1455                         for(core::map<u16, RemoteClient*>::Iterator
1456                                 i = m_clients.getIterator();
1457                                 i.atEnd() == false; i++)
1458                         {
1459                                 //u16 peer_id = i.getNode()->getKey();
1460                                 RemoteClient *client = i.getNode()->getValue();
1461                                 Player *player = m_env->getPlayer(client->peer_id);
1462                                 if(player==NULL)
1463                                         continue;
1464                                 infostream<<"* "<<player->getName()<<"\t";
1465                                 client->PrintInfo(infostream);
1466                         }
1467                 }
1468         }
1469
1470         //if(g_settings->getBool("enable_experimental"))
1471         {
1472
1473         /*
1474                 Check added and deleted active objects
1475         */
1476         {
1477                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1478                 JMutexAutoLock envlock(m_env_mutex);
1479                 JMutexAutoLock conlock(m_con_mutex);
1480
1481                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1482
1483                 // Radius inside which objects are active
1484                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1485                 radius *= MAP_BLOCKSIZE;
1486
1487                 for(core::map<u16, RemoteClient*>::Iterator
1488                         i = m_clients.getIterator();
1489                         i.atEnd() == false; i++)
1490                 {
1491                         RemoteClient *client = i.getNode()->getValue();
1492
1493                         // If definitions and textures have not been sent, don't
1494                         // send objects either
1495                         if(!client->definitions_sent)
1496                                 continue;
1497
1498                         Player *player = m_env->getPlayer(client->peer_id);
1499                         if(player==NULL)
1500                         {
1501                                 // This can happen if the client timeouts somehow
1502                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1503                                                 <<client->peer_id
1504                                                 <<" has no associated player"<<std::endl;*/
1505                                 continue;
1506                         }
1507                         v3s16 pos = floatToInt(player->getPosition(), BS);
1508
1509                         core::map<u16, bool> removed_objects;
1510                         core::map<u16, bool> added_objects;
1511                         m_env->getRemovedActiveObjects(pos, radius,
1512                                         client->m_known_objects, removed_objects);
1513                         m_env->getAddedActiveObjects(pos, radius,
1514                                         client->m_known_objects, added_objects);
1515
1516                         // Ignore if nothing happened
1517                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1518                         {
1519                                 //infostream<<"active objects: none changed"<<std::endl;
1520                                 continue;
1521                         }
1522
1523                         std::string data_buffer;
1524
1525                         char buf[4];
1526
1527                         // Handle removed objects
1528                         writeU16((u8*)buf, removed_objects.size());
1529                         data_buffer.append(buf, 2);
1530                         for(core::map<u16, bool>::Iterator
1531                                         i = removed_objects.getIterator();
1532                                         i.atEnd()==false; i++)
1533                         {
1534                                 // Get object
1535                                 u16 id = i.getNode()->getKey();
1536                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1537
1538                                 // Add to data buffer for sending
1539                                 writeU16((u8*)buf, i.getNode()->getKey());
1540                                 data_buffer.append(buf, 2);
1541
1542                                 // Remove from known objects
1543                                 client->m_known_objects.remove(i.getNode()->getKey());
1544
1545                                 if(obj && obj->m_known_by_count > 0)
1546                                         obj->m_known_by_count--;
1547                         }
1548
1549                         // Handle added objects
1550                         writeU16((u8*)buf, added_objects.size());
1551                         data_buffer.append(buf, 2);
1552                         for(core::map<u16, bool>::Iterator
1553                                         i = added_objects.getIterator();
1554                                         i.atEnd()==false; i++)
1555                         {
1556                                 // Get object
1557                                 u16 id = i.getNode()->getKey();
1558                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1559
1560                                 // Get object type
1561                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1562                                 if(obj == NULL)
1563                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1564                                                         <<": NULL object"<<std::endl;
1565                                 else
1566                                         type = obj->getSendType();
1567
1568                                 // Add to data buffer for sending
1569                                 writeU16((u8*)buf, id);
1570                                 data_buffer.append(buf, 2);
1571                                 writeU8((u8*)buf, type);
1572                                 data_buffer.append(buf, 1);
1573
1574                                 if(obj)
1575                                         data_buffer.append(serializeLongString(
1576                                                         obj->getClientInitializationData(client->net_proto_version)));
1577                                 else
1578                                         data_buffer.append(serializeLongString(""));
1579
1580                                 // Add to known objects
1581                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1582
1583                                 if(obj)
1584                                         obj->m_known_by_count++;
1585                         }
1586
1587                         // Send packet
1588                         SharedBuffer<u8> reply(2 + data_buffer.size());
1589                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1590                         memcpy((char*)&reply[2], data_buffer.c_str(),
1591                                         data_buffer.size());
1592                         // Send as reliable
1593                         m_con.Send(client->peer_id, 0, reply, true);
1594
1595                         verbosestream<<"Server: Sent object remove/add: "
1596                                         <<removed_objects.size()<<" removed, "
1597                                         <<added_objects.size()<<" added, "
1598                                         <<"packet size is "<<reply.getSize()<<std::endl;
1599                 }
1600
1601 #if 0
1602                 /*
1603                         Collect a list of all the objects known by the clients
1604                         and report it back to the environment.
1605                 */
1606
1607                 core::map<u16, bool> all_known_objects;
1608
1609                 for(core::map<u16, RemoteClient*>::Iterator
1610                         i = m_clients.getIterator();
1611                         i.atEnd() == false; i++)
1612                 {
1613                         RemoteClient *client = i.getNode()->getValue();
1614                         // Go through all known objects of client
1615                         for(core::map<u16, bool>::Iterator
1616                                         i = client->m_known_objects.getIterator();
1617                                         i.atEnd()==false; i++)
1618                         {
1619                                 u16 id = i.getNode()->getKey();
1620                                 all_known_objects[id] = true;
1621                         }
1622                 }
1623
1624                 m_env->setKnownActiveObjects(whatever);
1625 #endif
1626
1627         }
1628
1629         /*
1630                 Send object messages
1631         */
1632         {
1633                 JMutexAutoLock envlock(m_env_mutex);
1634                 JMutexAutoLock conlock(m_con_mutex);
1635
1636                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1637
1638                 // Key = object id
1639                 // Value = data sent by object
1640                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1641
1642                 // Get active object messages from environment
1643                 for(;;)
1644                 {
1645                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1646                         if(aom.id == 0)
1647                                 break;
1648
1649                         core::list<ActiveObjectMessage>* message_list = NULL;
1650                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1651                         n = buffered_messages.find(aom.id);
1652                         if(n == NULL)
1653                         {
1654                                 message_list = new core::list<ActiveObjectMessage>;
1655                                 buffered_messages.insert(aom.id, message_list);
1656                         }
1657                         else
1658                         {
1659                                 message_list = n->getValue();
1660                         }
1661                         message_list->push_back(aom);
1662                 }
1663
1664                 // Route data to every client
1665                 for(core::map<u16, RemoteClient*>::Iterator
1666                         i = m_clients.getIterator();
1667                         i.atEnd()==false; i++)
1668                 {
1669                         RemoteClient *client = i.getNode()->getValue();
1670                         std::string reliable_data;
1671                         std::string unreliable_data;
1672                         // Go through all objects in message buffer
1673                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1674                                         j = buffered_messages.getIterator();
1675                                         j.atEnd()==false; j++)
1676                         {
1677                                 // If object is not known by client, skip it
1678                                 u16 id = j.getNode()->getKey();
1679                                 if(client->m_known_objects.find(id) == NULL)
1680                                         continue;
1681                                 // Get message list of object
1682                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1683                                 // Go through every message
1684                                 for(core::list<ActiveObjectMessage>::Iterator
1685                                                 k = list->begin(); k != list->end(); k++)
1686                                 {
1687                                         // Compose the full new data with header
1688                                         ActiveObjectMessage aom = *k;
1689                                         std::string new_data;
1690                                         // Add object id
1691                                         char buf[2];
1692                                         writeU16((u8*)&buf[0], aom.id);
1693                                         new_data.append(buf, 2);
1694                                         // Add data
1695                                         new_data += serializeString(aom.datastring);
1696                                         // Add data to buffer
1697                                         if(aom.reliable)
1698                                                 reliable_data += new_data;
1699                                         else
1700                                                 unreliable_data += new_data;
1701                                 }
1702                         }
1703                         /*
1704                                 reliable_data and unreliable_data are now ready.
1705                                 Send them.
1706                         */
1707                         if(reliable_data.size() > 0)
1708                         {
1709                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1710                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1711                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1712                                                 reliable_data.size());
1713                                 // Send as reliable
1714                                 m_con.Send(client->peer_id, 0, reply, true);
1715                         }
1716                         if(unreliable_data.size() > 0)
1717                         {
1718                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1719                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1720                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1721                                                 unreliable_data.size());
1722                                 // Send as unreliable
1723                                 m_con.Send(client->peer_id, 0, reply, false);
1724                         }
1725
1726                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1727                         {
1728                                 infostream<<"Server: Size of object message data: "
1729                                                 <<"reliable: "<<reliable_data.size()
1730                                                 <<", unreliable: "<<unreliable_data.size()
1731                                                 <<std::endl;
1732                         }*/
1733                 }
1734
1735                 // Clear buffered_messages
1736                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1737                                 i = buffered_messages.getIterator();
1738                                 i.atEnd()==false; i++)
1739                 {
1740                         delete i.getNode()->getValue();
1741                 }
1742         }
1743
1744         } // enable_experimental
1745
1746         /*
1747                 Send queued-for-sending map edit events.
1748         */
1749         {
1750                 // We will be accessing the environment and the connection
1751                 JMutexAutoLock lock(m_env_mutex);
1752                 JMutexAutoLock conlock(m_con_mutex);
1753
1754                 // Don't send too many at a time
1755                 //u32 count = 0;
1756
1757                 // Single change sending is disabled if queue size is not small
1758                 bool disable_single_change_sending = false;
1759                 if(m_unsent_map_edit_queue.size() >= 4)
1760                         disable_single_change_sending = true;
1761
1762                 int event_count = m_unsent_map_edit_queue.size();
1763
1764                 // We'll log the amount of each
1765                 Profiler prof;
1766
1767                 while(m_unsent_map_edit_queue.size() != 0)
1768                 {
1769                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1770
1771                         // Players far away from the change are stored here.
1772                         // Instead of sending the changes, MapBlocks are set not sent
1773                         // for them.
1774                         core::list<u16> far_players;
1775
1776                         if(event->type == MEET_ADDNODE)
1777                         {
1778                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1779                                 prof.add("MEET_ADDNODE", 1);
1780                                 if(disable_single_change_sending)
1781                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1782                                                         &far_players, 5);
1783                                 else
1784                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1785                                                         &far_players, 30);
1786                         }
1787                         else if(event->type == MEET_REMOVENODE)
1788                         {
1789                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1790                                 prof.add("MEET_REMOVENODE", 1);
1791                                 if(disable_single_change_sending)
1792                                         sendRemoveNode(event->p, event->already_known_by_peer,
1793                                                         &far_players, 5);
1794                                 else
1795                                         sendRemoveNode(event->p, event->already_known_by_peer,
1796                                                         &far_players, 30);
1797                         }
1798                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1799                         {
1800                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1801                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1802                                 setBlockNotSent(event->p);
1803                         }
1804                         else if(event->type == MEET_OTHER)
1805                         {
1806                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1807                                 prof.add("MEET_OTHER", 1);
1808                                 for(core::map<v3s16, bool>::Iterator
1809                                                 i = event->modified_blocks.getIterator();
1810                                                 i.atEnd()==false; i++)
1811                                 {
1812                                         v3s16 p = i.getNode()->getKey();
1813                                         setBlockNotSent(p);
1814                                 }
1815                         }
1816                         else
1817                         {
1818                                 prof.add("unknown", 1);
1819                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1820                                                 <<((u32)event->type)<<std::endl;
1821                         }
1822
1823                         /*
1824                                 Set blocks not sent to far players
1825                         */
1826                         if(far_players.size() > 0)
1827                         {
1828                                 // Convert list format to that wanted by SetBlocksNotSent
1829                                 core::map<v3s16, MapBlock*> modified_blocks2;
1830                                 for(core::map<v3s16, bool>::Iterator
1831                                                 i = event->modified_blocks.getIterator();
1832                                                 i.atEnd()==false; i++)
1833                                 {
1834                                         v3s16 p = i.getNode()->getKey();
1835                                         modified_blocks2.insert(p,
1836                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1837                                 }
1838                                 // Set blocks not sent
1839                                 for(core::list<u16>::Iterator
1840                                                 i = far_players.begin();
1841                                                 i != far_players.end(); i++)
1842                                 {
1843                                         u16 peer_id = *i;
1844                                         RemoteClient *client = getClient(peer_id);
1845                                         if(client==NULL)
1846                                                 continue;
1847                                         client->SetBlocksNotSent(modified_blocks2);
1848                                 }
1849                         }
1850
1851                         delete event;
1852
1853                         /*// Don't send too many at a time
1854                         count++;
1855                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1856                                 break;*/
1857                 }
1858
1859                 if(event_count >= 5){
1860                         infostream<<"Server: MapEditEvents:"<<std::endl;
1861                         prof.print(infostream);
1862                 } else if(event_count != 0){
1863                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1864                         prof.print(verbosestream);
1865                 }
1866
1867         }
1868
1869         /*
1870                 Trigger emergethread (it somehow gets to a non-triggered but
1871                 bysy state sometimes)
1872         */
1873         {
1874                 float &counter = m_emergethread_trigger_timer;
1875                 counter += dtime;
1876                 if(counter >= 2.0)
1877                 {
1878                         counter = 0.0;
1879
1880                         m_emergethread.trigger();
1881
1882                         // Update m_enable_rollback_recording here too
1883                         m_enable_rollback_recording =
1884                                         g_settings->getBool("enable_rollback_recording");
1885                 }
1886         }
1887
1888         // Save map, players and auth stuff
1889         {
1890                 float &counter = m_savemap_timer;
1891                 counter += dtime;
1892                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1893                 {
1894                         counter = 0.0;
1895                         JMutexAutoLock lock(m_env_mutex);
1896
1897                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1898
1899                         //Ban stuff
1900                         if(m_banmanager.isModified())
1901                                 m_banmanager.save();
1902
1903                         // Save changed parts of map
1904                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1905
1906                         // Save players
1907                         m_env->serializePlayers(m_path_world);
1908
1909                         // Save environment metadata
1910                         m_env->saveMeta(m_path_world);
1911                 }
1912         }
1913 }
1914
1915 void Server::Receive()
1916 {
1917         DSTACK(__FUNCTION_NAME);
1918         SharedBuffer<u8> data;
1919         u16 peer_id;
1920         u32 datasize;
1921         try{
1922                 {
1923                         JMutexAutoLock conlock(m_con_mutex);
1924                         datasize = m_con.Receive(peer_id, data);
1925                 }
1926
1927                 // This has to be called so that the client list gets synced
1928                 // with the peer list of the connection
1929                 handlePeerChanges();
1930
1931                 ProcessData(*data, datasize, peer_id);
1932         }
1933         catch(con::InvalidIncomingDataException &e)
1934         {
1935                 infostream<<"Server::Receive(): "
1936                                 "InvalidIncomingDataException: what()="
1937                                 <<e.what()<<std::endl;
1938         }
1939         catch(con::PeerNotFoundException &e)
1940         {
1941                 //NOTE: This is not needed anymore
1942
1943                 // The peer has been disconnected.
1944                 // Find the associated player and remove it.
1945
1946                 /*JMutexAutoLock envlock(m_env_mutex);
1947
1948                 infostream<<"ServerThread: peer_id="<<peer_id
1949                                 <<" has apparently closed connection. "
1950                                 <<"Removing player."<<std::endl;
1951
1952                 m_env->removePlayer(peer_id);*/
1953         }
1954 }
1955
1956 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1957 {
1958         DSTACK(__FUNCTION_NAME);
1959         // Environment is locked first.
1960         JMutexAutoLock envlock(m_env_mutex);
1961         JMutexAutoLock conlock(m_con_mutex);
1962
1963         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1964
1965         try{
1966                 Address address = m_con.GetPeerAddress(peer_id);
1967                 std::string addr_s = address.serializeString();
1968
1969                 // drop player if is ip is banned
1970                 if(m_banmanager.isIpBanned(addr_s)){
1971                         infostream<<"Server: A banned client tried to connect from "
1972                                         <<addr_s<<"; banned name was "
1973                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1974                         // This actually doesn't seem to transfer to the client
1975                         SendAccessDenied(m_con, peer_id,
1976                                         L"Your ip is banned. Banned name was "
1977                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1978                         m_con.DeletePeer(peer_id);
1979                         return;
1980                 }
1981         }
1982         catch(con::PeerNotFoundException &e)
1983         {
1984                 infostream<<"Server::ProcessData(): Cancelling: peer "
1985                                 <<peer_id<<" not found"<<std::endl;
1986                 return;
1987         }
1988
1989         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1990
1991         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1992
1993         try
1994         {
1995
1996         if(datasize < 2)
1997                 return;
1998
1999         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
2000
2001         if(command == TOSERVER_INIT)
2002         {
2003                 // [0] u16 TOSERVER_INIT
2004                 // [2] u8 SER_FMT_VER_HIGHEST
2005                 // [3] u8[20] player_name
2006                 // [23] u8[28] password <--- can be sent without this, from old versions
2007
2008                 if(datasize < 2+1+PLAYERNAME_SIZE)
2009                         return;
2010
2011                 verbosestream<<"Server: Got TOSERVER_INIT from "
2012                                 <<peer_id<<std::endl;
2013
2014                 // First byte after command is maximum supported
2015                 // serialization version
2016                 u8 client_max = data[2];
2017                 u8 our_max = SER_FMT_VER_HIGHEST;
2018                 // Use the highest version supported by both
2019                 u8 deployed = core::min_(client_max, our_max);
2020                 // If it's lower than the lowest supported, give up.
2021                 if(deployed < SER_FMT_VER_LOWEST)
2022                         deployed = SER_FMT_VER_INVALID;
2023
2024                 //peer->serialization_version = deployed;
2025                 getClient(peer_id)->pending_serialization_version = deployed;
2026
2027                 if(deployed == SER_FMT_VER_INVALID)
2028                 {
2029                         actionstream<<"Server: A mismatched client tried to connect from "
2030                                         <<addr_s<<std::endl;
2031                         infostream<<"Server: Cannot negotiate "
2032                                         "serialization version with peer "
2033                                         <<peer_id<<std::endl;
2034                         SendAccessDenied(m_con, peer_id, std::wstring(
2035                                         L"Your client's version is not supported.\n"
2036                                         L"Server version is ")
2037                                         + narrow_to_wide(VERSION_STRING) + L"."
2038                         );
2039                         return;
2040                 }
2041
2042                 /*
2043                         Read and check network protocol version
2044                 */
2045
2046                 u16 min_net_proto_version = 0;
2047                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2048                         min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2049
2050                 // Use same version as minimum and maximum if maximum version field
2051                 // doesn't exist (backwards compatibility)
2052                 u16 max_net_proto_version = min_net_proto_version;
2053                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
2054                         max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
2055
2056                 // Start with client's maximum version
2057                 u16 net_proto_version = max_net_proto_version;
2058
2059                 // Figure out a working version if it is possible at all
2060                 if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
2061                                 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX)
2062                 {
2063                         // If maximum is larger than our maximum, go with our maximum
2064                         if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2065                                 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
2066                         // Else go with client's maximum
2067                         else
2068                                 net_proto_version = max_net_proto_version;
2069                 }
2070
2071                 verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
2072                                 <<min_net_proto_version<<", max: "<<max_net_proto_version
2073                                 <<", chosen: "<<net_proto_version<<std::endl;
2074
2075                 getClient(peer_id)->net_proto_version = net_proto_version;
2076
2077                 if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
2078                                 net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2079                 {
2080                         actionstream<<"Server: A mismatched client tried to connect from "<<addr_s
2081                                         <<std::endl;
2082                         SendAccessDenied(m_con, peer_id, std::wstring(
2083                                         L"Your client's version is not supported.\n"
2084                                         L"Server version is ")
2085                                         + narrow_to_wide(VERSION_STRING) + L",\n"
2086                                         + L"server's PROTOCOL_VERSION is "
2087                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
2088                                         + L"..."
2089                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
2090                                         + L", client's PROTOCOL_VERSION is "
2091                                         + narrow_to_wide(itos(min_net_proto_version))
2092                                         + L"..."
2093                                         + narrow_to_wide(itos(max_net_proto_version))
2094                         );
2095                         return;
2096                 }
2097
2098                 if(g_settings->getBool("strict_protocol_version_checking"))
2099                 {
2100                         if(net_proto_version != LATEST_PROTOCOL_VERSION)
2101                         {
2102                                 actionstream<<"Server: A mismatched (strict) client tried to "
2103                                                 <<"connect from "<<addr_s<<std::endl;
2104                                 SendAccessDenied(m_con, peer_id, std::wstring(
2105                                                 L"Your client's version is not supported.\n"
2106                                                 L"Server version is ")
2107                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2108                                                 + L"server's PROTOCOL_VERSION (strict) is "
2109                                                 + narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
2110                                                 + L", client's PROTOCOL_VERSION is "
2111                                                 + narrow_to_wide(itos(min_net_proto_version))
2112                                                 + L"..."
2113                                                 + narrow_to_wide(itos(max_net_proto_version))
2114                                 );
2115                                 return;
2116                         }
2117                 }
2118
2119                 /*
2120                         Set up player
2121                 */
2122
2123                 // Get player name
2124                 char playername[PLAYERNAME_SIZE];
2125                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2126                 {
2127                         playername[i] = data[3+i];
2128                 }
2129                 playername[PLAYERNAME_SIZE-1] = 0;
2130
2131                 if(playername[0]=='\0')
2132                 {
2133                         actionstream<<"Server: Player with an empty name "
2134                                         <<"tried to connect from "<<addr_s<<std::endl;
2135                         SendAccessDenied(m_con, peer_id,
2136                                         L"Empty name");
2137                         return;
2138                 }
2139
2140                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2141                 {
2142                         actionstream<<"Server: Player with an invalid name "
2143                                         <<"tried to connect from "<<addr_s<<std::endl;
2144                         SendAccessDenied(m_con, peer_id,
2145                                         L"Name contains unallowed characters");
2146                         return;
2147                 }
2148
2149                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2150                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2151
2152                 // Get password
2153                 char given_password[PASSWORD_SIZE];
2154                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2155                 {
2156                         // old version - assume blank password
2157                         given_password[0] = 0;
2158                 }
2159                 else
2160                 {
2161                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2162                         {
2163                                 given_password[i] = data[23+i];
2164                         }
2165                         given_password[PASSWORD_SIZE-1] = 0;
2166                 }
2167
2168                 if(!base64_is_valid(given_password)){
2169                         infostream<<"Server: "<<playername
2170                                         <<" supplied invalid password hash"<<std::endl;
2171                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2172                         return;
2173                 }
2174
2175                 std::string checkpwd; // Password hash to check against
2176                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2177
2178                 // If no authentication info exists for user, create it
2179                 if(!has_auth){
2180                         if(!isSingleplayer() &&
2181                                         g_settings->getBool("disallow_empty_password") &&
2182                                         std::string(given_password) == ""){
2183                                 SendAccessDenied(m_con, peer_id, L"Empty passwords are "
2184                                                 L"disallowed. Set a password and try again.");
2185                                 return;
2186                         }
2187                         std::wstring raw_default_password =
2188                                 narrow_to_wide(g_settings->get("default_password"));
2189                         std::string initial_password =
2190                                 translatePassword(playername, raw_default_password);
2191
2192                         // If default_password is empty, allow any initial password
2193                         if (raw_default_password.length() == 0)
2194                                 initial_password = given_password;
2195
2196                         scriptapi_create_auth(m_lua, playername, initial_password);
2197                 }
2198
2199                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2200
2201                 if(!has_auth){
2202                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2203                         return;
2204                 }
2205
2206                 if(given_password != checkpwd){
2207                         infostream<<"Server: peer_id="<<peer_id
2208                                         <<": supplied invalid password for "
2209                                         <<playername<<std::endl;
2210                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2211                         return;
2212                 }
2213
2214                 // Do not allow multiple players in simple singleplayer mode.
2215                 // This isn't a perfect way to do it, but will suffice for now.
2216                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2217                         infostream<<"Server: Not allowing another client to connect in"
2218                                         <<" simple singleplayer mode"<<std::endl;
2219                         SendAccessDenied(m_con, peer_id,
2220                                         L"Running in simple singleplayer mode.");
2221                         return;
2222                 }
2223
2224                 // Enforce user limit.
2225                 // Don't enforce for users that have some admin right
2226                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2227                                 !checkPriv(playername, "server") &&
2228                                 !checkPriv(playername, "ban") &&
2229                                 !checkPriv(playername, "privs") &&
2230                                 !checkPriv(playername, "password") &&
2231                                 playername != g_settings->get("name"))
2232                 {
2233                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2234                                         <<" are already max_users="
2235                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2236                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2237                         return;
2238                 }
2239
2240                 // Get player
2241                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2242
2243                 // If failed, cancel
2244                 if(playersao == NULL)
2245                 {
2246                         errorstream<<"Server: peer_id="<<peer_id
2247                                         <<": failed to emerge player"<<std::endl;
2248                         return;
2249                 }
2250
2251                 /*
2252                         Answer with a TOCLIENT_INIT
2253                 */
2254                 {
2255                         SharedBuffer<u8> reply(2+1+6+8+4);
2256                         writeU16(&reply[0], TOCLIENT_INIT);
2257                         writeU8(&reply[2], deployed);
2258                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2259                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2260                         writeF1000(&reply[2+1+6+8], g_settings->getFloat("dedicated_server_step"));
2261
2262                         // Send as reliable
2263                         m_con.Send(peer_id, 0, reply, true);
2264                 }
2265
2266                 /*
2267                         Send complete position information
2268                 */
2269                 SendMovePlayer(peer_id);
2270
2271                 return;
2272         }
2273
2274         if(command == TOSERVER_INIT2)
2275         {
2276                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2277                                 <<peer_id<<std::endl;
2278
2279                 Player *player = m_env->getPlayer(peer_id);
2280                 if(!player){
2281                         verbosestream<<"Server: TOSERVER_INIT2: "
2282                                         <<"Player not found; ignoring."<<std::endl;
2283                         return;
2284                 }
2285
2286                 RemoteClient *client = getClient(peer_id);
2287                 client->serialization_version =
2288                                 getClient(peer_id)->pending_serialization_version;
2289
2290                 /*
2291                         Send some initialization data
2292                 */
2293
2294                 infostream<<"Server: Sending content to "
2295                                 <<getPlayerName(peer_id)<<std::endl;
2296
2297                 // Send item definitions
2298                 SendItemDef(m_con, peer_id, m_itemdef);
2299
2300                 // Send node definitions
2301                 SendNodeDef(m_con, peer_id, m_nodedef, client->net_proto_version);
2302
2303                 // Send media announcement
2304                 sendMediaAnnouncement(peer_id);
2305
2306                 // Send privileges
2307                 SendPlayerPrivileges(peer_id);
2308
2309                 // Send inventory formspec
2310                 SendPlayerInventoryFormspec(peer_id);
2311
2312                 // Send inventory
2313                 UpdateCrafting(peer_id);
2314                 SendInventory(peer_id);
2315
2316                 // Send HP
2317                 SendPlayerHP(peer_id);
2318
2319                 // Send detached inventories
2320                 sendDetachedInventories(peer_id);
2321
2322                 // Show death screen if necessary
2323                 if(player->hp == 0)
2324                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2325
2326                 // Send time of day
2327                 {
2328                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2329                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2330                         m_con.Send(peer_id, 0, data, true);
2331                 }
2332
2333                 // Note things in chat if not in simple singleplayer mode
2334                 if(!m_simple_singleplayer_mode)
2335                 {
2336                         // Send information about server to player in chat
2337                         SendChatMessage(peer_id, getStatusString());
2338
2339                         // Send information about joining in chat
2340                         {
2341                                 std::wstring name = L"unknown";
2342                                 Player *player = m_env->getPlayer(peer_id);
2343                                 if(player != NULL)
2344                                         name = narrow_to_wide(player->getName());
2345
2346                                 std::wstring message;
2347                                 message += L"*** ";
2348                                 message += name;
2349                                 message += L" joined the game.";
2350                                 BroadcastChatMessage(message);
2351                         }
2352                 }
2353
2354                 // Warnings about protocol version can be issued here
2355                 if(getClient(peer_id)->net_proto_version < LATEST_PROTOCOL_VERSION)
2356                 {
2357                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT'S "
2358                                         L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
2359                 }
2360
2361                 /*
2362                         Print out action
2363                 */
2364                 {
2365                         std::ostringstream os(std::ios_base::binary);
2366                         for(core::map<u16, RemoteClient*>::Iterator
2367                                 i = m_clients.getIterator();
2368                                 i.atEnd() == false; i++)
2369                         {
2370                                 RemoteClient *client = i.getNode()->getValue();
2371                                 assert(client->peer_id == i.getNode()->getKey());
2372                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2373                                         continue;
2374                                 // Get player
2375                                 Player *player = m_env->getPlayer(client->peer_id);
2376                                 if(!player)
2377                                         continue;
2378                                 // Get name of player
2379                                 os<<player->getName()<<" ";
2380                         }
2381
2382                         actionstream<<player->getName()<<" joins game. List of players: "
2383                                         <<os.str()<<std::endl;
2384                 }
2385
2386                 return;
2387         }
2388
2389         if(peer_ser_ver == SER_FMT_VER_INVALID)
2390         {
2391                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2392                                 " serialization format invalid or not initialized."
2393                                 " Skipping incoming command="<<command<<std::endl;
2394                 return;
2395         }
2396
2397         Player *player = m_env->getPlayer(peer_id);
2398         if(player == NULL){
2399                 infostream<<"Server::ProcessData(): Cancelling: "
2400                                 "No player for peer_id="<<peer_id
2401                                 <<std::endl;
2402                 return;
2403         }
2404
2405         PlayerSAO *playersao = player->getPlayerSAO();
2406         if(playersao == NULL){
2407                 infostream<<"Server::ProcessData(): Cancelling: "
2408                                 "No player object for peer_id="<<peer_id
2409                                 <<std::endl;
2410                 return;
2411         }
2412
2413         if(command == TOSERVER_PLAYERPOS)
2414         {
2415                 if(datasize < 2+12+12+4+4)
2416                         return;
2417
2418                 u32 start = 0;
2419                 v3s32 ps = readV3S32(&data[start+2]);
2420                 v3s32 ss = readV3S32(&data[start+2+12]);
2421                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2422                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2423                 u32 keyPressed = 0;
2424                 if(datasize >= 2+12+12+4+4+4)
2425                         keyPressed = (u32)readU32(&data[2+12+12+4+4]);
2426                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2427                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2428                 pitch = wrapDegrees(pitch);
2429                 yaw = wrapDegrees(yaw);
2430
2431                 player->setPosition(position);
2432                 player->setSpeed(speed);
2433                 player->setPitch(pitch);
2434                 player->setYaw(yaw);
2435                 player->keyPressed=keyPressed;
2436                 player->control.up = (bool)(keyPressed&1);
2437                 player->control.down = (bool)(keyPressed&2);
2438                 player->control.left = (bool)(keyPressed&4);
2439                 player->control.right = (bool)(keyPressed&8);
2440                 player->control.jump = (bool)(keyPressed&16);
2441                 player->control.aux1 = (bool)(keyPressed&32);
2442                 player->control.sneak = (bool)(keyPressed&64);
2443                 player->control.LMB = (bool)(keyPressed&128);
2444                 player->control.RMB = (bool)(keyPressed&256);
2445
2446                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2447                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2448                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2449         }
2450         else if(command == TOSERVER_GOTBLOCKS)
2451         {
2452                 if(datasize < 2+1)
2453                         return;
2454
2455                 /*
2456                         [0] u16 command
2457                         [2] u8 count
2458                         [3] v3s16 pos_0
2459                         [3+6] v3s16 pos_1
2460                         ...
2461                 */
2462
2463                 u16 count = data[2];
2464                 for(u16 i=0; i<count; i++)
2465                 {
2466                         if((s16)datasize < 2+1+(i+1)*6)
2467                                 throw con::InvalidIncomingDataException
2468                                         ("GOTBLOCKS length is too short");
2469                         v3s16 p = readV3S16(&data[2+1+i*6]);
2470                         /*infostream<<"Server: GOTBLOCKS ("
2471                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2472                         RemoteClient *client = getClient(peer_id);
2473                         client->GotBlock(p);
2474                 }
2475         }
2476         else if(command == TOSERVER_DELETEDBLOCKS)
2477         {
2478                 if(datasize < 2+1)
2479                         return;
2480
2481                 /*
2482                         [0] u16 command
2483                         [2] u8 count
2484                         [3] v3s16 pos_0
2485                         [3+6] v3s16 pos_1
2486                         ...
2487                 */
2488
2489                 u16 count = data[2];
2490                 for(u16 i=0; i<count; i++)
2491                 {
2492                         if((s16)datasize < 2+1+(i+1)*6)
2493                                 throw con::InvalidIncomingDataException
2494                                         ("DELETEDBLOCKS length is too short");
2495                         v3s16 p = readV3S16(&data[2+1+i*6]);
2496                         /*infostream<<"Server: DELETEDBLOCKS ("
2497                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2498                         RemoteClient *client = getClient(peer_id);
2499                         client->SetBlockNotSent(p);
2500                 }
2501         }
2502         else if(command == TOSERVER_CLICK_OBJECT)
2503         {
2504                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2505                 return;
2506         }
2507         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2508         {
2509                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2510                 return;
2511         }
2512         else if(command == TOSERVER_GROUND_ACTION)
2513         {
2514                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2515                 return;
2516
2517         }
2518         else if(command == TOSERVER_RELEASE)
2519         {
2520                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2521                 return;
2522         }
2523         else if(command == TOSERVER_SIGNTEXT)
2524         {
2525                 infostream<<"Server: SIGNTEXT not supported anymore"
2526                                 <<std::endl;
2527                 return;
2528         }
2529         else if(command == TOSERVER_SIGNNODETEXT)
2530         {
2531                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2532                                 <<std::endl;
2533                 return;
2534         }
2535         else if(command == TOSERVER_INVENTORY_ACTION)
2536         {
2537                 // Strip command and create a stream
2538                 std::string datastring((char*)&data[2], datasize-2);
2539                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2540                 std::istringstream is(datastring, std::ios_base::binary);
2541                 // Create an action
2542                 InventoryAction *a = InventoryAction::deSerialize(is);
2543                 if(a == NULL)
2544                 {
2545                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2546                                         <<"InventoryAction::deSerialize() returned NULL"
2547                                         <<std::endl;
2548                         return;
2549                 }
2550
2551                 // If something goes wrong, this player is to blame
2552                 RollbackScopeActor rollback_scope(m_rollback,
2553                                 std::string("player:")+player->getName());
2554
2555                 /*
2556                         Note: Always set inventory not sent, to repair cases
2557                         where the client made a bad prediction.
2558                 */
2559
2560                 /*
2561                         Handle restrictions and special cases of the move action
2562                 */
2563                 if(a->getType() == IACTION_MOVE)
2564                 {
2565                         IMoveAction *ma = (IMoveAction*)a;
2566
2567                         ma->from_inv.applyCurrentPlayer(player->getName());
2568                         ma->to_inv.applyCurrentPlayer(player->getName());
2569
2570                         setInventoryModified(ma->from_inv);
2571                         setInventoryModified(ma->to_inv);
2572
2573                         bool from_inv_is_current_player =
2574                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2575                                 (ma->from_inv.name == player->getName());
2576
2577                         bool to_inv_is_current_player =
2578                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2579                                 (ma->to_inv.name == player->getName());
2580
2581                         /*
2582                                 Disable moving items out of craftpreview
2583                         */
2584                         if(ma->from_list == "craftpreview")
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 src is "<<ma->from_list<<std::endl;
2590                                 delete a;
2591                                 return;
2592                         }
2593
2594                         /*
2595                                 Disable moving items into craftresult and craftpreview
2596                         */
2597                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2598                         {
2599                                 infostream<<"Ignoring IMoveAction from "
2600                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2601                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2602                                                 <<" because dst is "<<ma->to_list<<std::endl;
2603                                 delete a;
2604                                 return;
2605                         }
2606
2607                         // Disallow moving items in elsewhere than player's inventory
2608                         // if not allowed to interact
2609                         if(!checkPriv(player->getName(), "interact") &&
2610                                         (!from_inv_is_current_player ||
2611                                         !to_inv_is_current_player))
2612                         {
2613                                 infostream<<"Cannot move outside of player's inventory: "
2614                                                 <<"No interact privilege"<<std::endl;
2615                                 delete a;
2616                                 return;
2617                         }
2618                 }
2619                 /*
2620                         Handle restrictions and special cases of the drop action
2621                 */
2622                 else if(a->getType() == IACTION_DROP)
2623                 {
2624                         IDropAction *da = (IDropAction*)a;
2625
2626                         da->from_inv.applyCurrentPlayer(player->getName());
2627
2628                         setInventoryModified(da->from_inv);
2629
2630                         // Disallow dropping items if not allowed to interact
2631                         if(!checkPriv(player->getName(), "interact"))
2632                         {
2633                                 delete a;
2634                                 return;
2635                         }
2636                 }
2637                 /*
2638                         Handle restrictions and special cases of the craft action
2639                 */
2640                 else if(a->getType() == IACTION_CRAFT)
2641                 {
2642                         ICraftAction *ca = (ICraftAction*)a;
2643
2644                         ca->craft_inv.applyCurrentPlayer(player->getName());
2645
2646                         setInventoryModified(ca->craft_inv);
2647
2648                         //bool craft_inv_is_current_player =
2649                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2650                         //      (ca->craft_inv.name == player->getName());
2651
2652                         // Disallow crafting if not allowed to interact
2653                         if(!checkPriv(player->getName(), "interact"))
2654                         {
2655                                 infostream<<"Cannot craft: "
2656                                                 <<"No interact privilege"<<std::endl;
2657                                 delete a;
2658                                 return;
2659                         }
2660                 }
2661
2662                 // Do the action
2663                 a->apply(this, playersao, this);
2664                 // Eat the action
2665                 delete a;
2666         }
2667         else if(command == TOSERVER_CHAT_MESSAGE)
2668         {
2669                 /*
2670                         u16 command
2671                         u16 length
2672                         wstring message
2673                 */
2674                 u8 buf[6];
2675                 std::string datastring((char*)&data[2], datasize-2);
2676                 std::istringstream is(datastring, std::ios_base::binary);
2677
2678                 // Read stuff
2679                 is.read((char*)buf, 2);
2680                 u16 len = readU16(buf);
2681
2682                 std::wstring message;
2683                 for(u16 i=0; i<len; i++)
2684                 {
2685                         is.read((char*)buf, 2);
2686                         message += (wchar_t)readU16(buf);
2687                 }
2688
2689                 // If something goes wrong, this player is to blame
2690                 RollbackScopeActor rollback_scope(m_rollback,
2691                                 std::string("player:")+player->getName());
2692
2693                 // Get player name of this client
2694                 std::wstring name = narrow_to_wide(player->getName());
2695
2696                 // Run script hook
2697                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2698                                 wide_to_narrow(message));
2699                 // If script ate the message, don't proceed
2700                 if(ate)
2701                         return;
2702
2703                 // Line to send to players
2704                 std::wstring line;
2705                 // Whether to send to the player that sent the line
2706                 bool send_to_sender = false;
2707                 // Whether to send to other players
2708                 bool send_to_others = false;
2709
2710                 // Commands are implemented in Lua, so only catch invalid
2711                 // commands that were not "eaten" and send an error back
2712                 if(message[0] == L'/')
2713                 {
2714                         message = message.substr(1);
2715                         send_to_sender = true;
2716                         if(message.length() == 0)
2717                                 line += L"-!- Empty command";
2718                         else
2719                                 line += L"-!- Invalid command: " + str_split(message, L' ')[0];
2720                 }
2721                 else
2722                 {
2723                         if(checkPriv(player->getName(), "shout")){
2724                                 line += L"<";
2725                                 line += name;
2726                                 line += L"> ";
2727                                 line += message;
2728                                 send_to_others = true;
2729                         } else {
2730                                 line += L"-!- You don't have permission to shout.";
2731                                 send_to_sender = true;
2732                         }
2733                 }
2734
2735                 if(line != L"")
2736                 {
2737                         if(send_to_others)
2738                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2739
2740                         /*
2741                                 Send the message to clients
2742                         */
2743                         for(core::map<u16, RemoteClient*>::Iterator
2744                                 i = m_clients.getIterator();
2745                                 i.atEnd() == false; i++)
2746                         {
2747                                 // Get client and check that it is valid
2748                                 RemoteClient *client = i.getNode()->getValue();
2749                                 assert(client->peer_id == i.getNode()->getKey());
2750                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2751                                         continue;
2752
2753                                 // Filter recipient
2754                                 bool sender_selected = (peer_id == client->peer_id);
2755                                 if(sender_selected == true && send_to_sender == false)
2756                                         continue;
2757                                 if(sender_selected == false && send_to_others == false)
2758                                         continue;
2759
2760                                 SendChatMessage(client->peer_id, line);
2761                         }
2762                 }
2763         }
2764         else if(command == TOSERVER_DAMAGE)
2765         {
2766                 std::string datastring((char*)&data[2], datasize-2);
2767                 std::istringstream is(datastring, std::ios_base::binary);
2768                 u8 damage = readU8(is);
2769
2770                 actionstream<<player->getName()<<" damaged by "
2771                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2772                                 <<std::endl;
2773
2774                 playersao->setHP(playersao->getHP() - damage);
2775
2776                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2777                         DiePlayer(peer_id);
2778
2779                 if(playersao->m_hp_not_sent)
2780                         SendPlayerHP(peer_id);
2781         }
2782         else if(command == TOSERVER_PASSWORD)
2783         {
2784                 /*
2785                         [0] u16 TOSERVER_PASSWORD
2786                         [2] u8[28] old password
2787                         [30] u8[28] new password
2788                 */
2789
2790                 if(datasize != 2+PASSWORD_SIZE*2)
2791                         return;
2792                 /*char password[PASSWORD_SIZE];
2793                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2794                         password[i] = data[2+i];
2795                 password[PASSWORD_SIZE-1] = 0;*/
2796                 std::string oldpwd;
2797                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2798                 {
2799                         char c = data[2+i];
2800                         if(c == 0)
2801                                 break;
2802                         oldpwd += c;
2803                 }
2804                 std::string newpwd;
2805                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2806                 {
2807                         char c = data[2+PASSWORD_SIZE+i];
2808                         if(c == 0)
2809                                 break;
2810                         newpwd += c;
2811                 }
2812
2813                 if(!base64_is_valid(newpwd)){
2814                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2815                         // Wrong old password supplied!!
2816                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2817                         return;
2818                 }
2819
2820                 infostream<<"Server: Client requests a password change from "
2821                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2822
2823                 std::string playername = player->getName();
2824
2825                 std::string checkpwd;
2826                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2827
2828                 if(oldpwd != checkpwd)
2829                 {
2830                         infostream<<"Server: invalid old password"<<std::endl;
2831                         // Wrong old password supplied!!
2832                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2833                         return;
2834                 }
2835
2836                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2837                 if(success){
2838                         actionstream<<player->getName()<<" changes password"<<std::endl;
2839                         SendChatMessage(peer_id, L"Password change successful.");
2840                 } else {
2841                         actionstream<<player->getName()<<" tries to change password but "
2842                                         <<"it fails"<<std::endl;
2843                         SendChatMessage(peer_id, L"Password change failed or inavailable.");
2844                 }
2845         }
2846         else if(command == TOSERVER_PLAYERITEM)
2847         {
2848                 if (datasize < 2+2)
2849                         return;
2850
2851                 u16 item = readU16(&data[2]);
2852                 playersao->setWieldIndex(item);
2853         }
2854         else if(command == TOSERVER_RESPAWN)
2855         {
2856                 if(player->hp != 0)
2857                         return;
2858
2859                 RespawnPlayer(peer_id);
2860
2861                 actionstream<<player->getName()<<" respawns at "
2862                                 <<PP(player->getPosition()/BS)<<std::endl;
2863
2864                 // ActiveObject is added to environment in AsyncRunStep after
2865                 // the previous addition has been succesfully removed
2866         }
2867         else if(command == TOSERVER_REQUEST_MEDIA) {
2868                 std::string datastring((char*)&data[2], datasize-2);
2869                 std::istringstream is(datastring, std::ios_base::binary);
2870
2871                 core::list<MediaRequest> tosend;
2872                 u16 numfiles = readU16(is);
2873
2874                 infostream<<"Sending "<<numfiles<<" files to "
2875                                 <<getPlayerName(peer_id)<<std::endl;
2876                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2877
2878                 for(int i = 0; i < numfiles; i++) {
2879                         std::string name = deSerializeString(is);
2880                         tosend.push_back(MediaRequest(name));
2881                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2882                                         <<name<<std::endl;
2883                 }
2884
2885                 sendRequestedMedia(peer_id, tosend);
2886
2887                 // Now the client should know about everything
2888                 // (definitions and files)
2889                 getClient(peer_id)->definitions_sent = true;
2890         }
2891         else if(command == TOSERVER_INTERACT)
2892         {
2893                 std::string datastring((char*)&data[2], datasize-2);
2894                 std::istringstream is(datastring, std::ios_base::binary);
2895
2896                 /*
2897                         [0] u16 command
2898                         [2] u8 action
2899                         [3] u16 item
2900                         [5] u32 length of the next item
2901                         [9] serialized PointedThing
2902                         actions:
2903                         0: start digging (from undersurface) or use
2904                         1: stop digging (all parameters ignored)
2905                         2: digging completed
2906                         3: place block or item (to abovesurface)
2907                         4: use item
2908                 */
2909                 u8 action = readU8(is);
2910                 u16 item_i = readU16(is);
2911                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2912                 PointedThing pointed;
2913                 pointed.deSerialize(tmp_is);
2914
2915                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2916                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2917
2918                 if(player->hp == 0)
2919                 {
2920                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2921                                 <<" tried to interact, but is dead!"<<std::endl;
2922                         return;
2923                 }
2924
2925                 v3f player_pos = playersao->getLastGoodPosition();
2926
2927                 // Update wielded item
2928                 playersao->setWieldIndex(item_i);
2929
2930                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2931                 v3s16 p_under = pointed.node_undersurface;
2932                 v3s16 p_above = pointed.node_abovesurface;
2933
2934                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2935                 ServerActiveObject *pointed_object = NULL;
2936                 if(pointed.type == POINTEDTHING_OBJECT)
2937                 {
2938                         pointed_object = m_env->getActiveObject(pointed.object_id);
2939                         if(pointed_object == NULL)
2940                         {
2941                                 verbosestream<<"TOSERVER_INTERACT: "
2942                                         "pointed object is NULL"<<std::endl;
2943                                 return;
2944                         }
2945
2946                 }
2947
2948                 v3f pointed_pos_under = player_pos;
2949                 v3f pointed_pos_above = player_pos;
2950                 if(pointed.type == POINTEDTHING_NODE)
2951                 {
2952                         pointed_pos_under = intToFloat(p_under, BS);
2953                         pointed_pos_above = intToFloat(p_above, BS);
2954                 }
2955                 else if(pointed.type == POINTEDTHING_OBJECT)
2956                 {
2957                         pointed_pos_under = pointed_object->getBasePosition();
2958                         pointed_pos_above = pointed_pos_under;
2959                 }
2960
2961                 /*
2962                         Check that target is reasonably close
2963                         (only when digging or placing things)
2964                 */
2965                 if(action == 0 || action == 2 || action == 3)
2966                 {
2967                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2968                         float max_d = BS * 14; // Just some large enough value
2969                         if(d > max_d){
2970                                 actionstream<<"Player "<<player->getName()
2971                                                 <<" tried to access "<<pointed.dump()
2972                                                 <<" from too far: "
2973                                                 <<"d="<<d<<", max_d="<<max_d
2974                                                 <<". ignoring."<<std::endl;
2975                                 // Re-send block to revert change on client-side
2976                                 RemoteClient *client = getClient(peer_id);
2977                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2978                                 client->SetBlockNotSent(blockpos);
2979                                 // Do nothing else
2980                                 return;
2981                         }
2982                 }
2983
2984                 /*
2985                         Make sure the player is allowed to do it
2986                 */
2987                 if(!checkPriv(player->getName(), "interact"))
2988                 {
2989                         actionstream<<player->getName()<<" attempted to interact with "
2990                                         <<pointed.dump()<<" without 'interact' privilege"
2991                                         <<std::endl;
2992                         // Re-send block to revert change on client-side
2993                         RemoteClient *client = getClient(peer_id);
2994                         // Digging completed -> under
2995                         if(action == 2){
2996                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2997                                 client->SetBlockNotSent(blockpos);
2998                         }
2999                         // Placement -> above
3000                         if(action == 3){
3001                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3002                                 client->SetBlockNotSent(blockpos);
3003                         }
3004                         return;
3005                 }
3006
3007                 /*
3008                         If something goes wrong, this player is to blame
3009                 */
3010                 RollbackScopeActor rollback_scope(m_rollback,
3011                                 std::string("player:")+player->getName());
3012
3013                 /*
3014                         0: start digging or punch object
3015                 */
3016                 if(action == 0)
3017                 {
3018                         if(pointed.type == POINTEDTHING_NODE)
3019                         {
3020                                 /*
3021                                         NOTE: This can be used in the future to check if
3022                                         somebody is cheating, by checking the timing.
3023                                 */
3024                                 MapNode n(CONTENT_IGNORE);
3025                                 try
3026                                 {
3027                                         n = m_env->getMap().getNode(p_under);
3028                                 }
3029                                 catch(InvalidPositionException &e)
3030                                 {
3031                                         infostream<<"Server: Not punching: Node not found."
3032                                                         <<" Adding block to emerge queue."
3033                                                         <<std::endl;
3034                                         m_emerge_queue.addBlock(peer_id,
3035                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3036                                 }
3037                                 if(n.getContent() != CONTENT_IGNORE)
3038                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
3039                                 // Cheat prevention
3040                                 playersao->noCheatDigStart(p_under);
3041                         }
3042                         else if(pointed.type == POINTEDTHING_OBJECT)
3043                         {
3044                                 // Skip if object has been removed
3045                                 if(pointed_object->m_removed)
3046                                         return;
3047
3048                                 actionstream<<player->getName()<<" punches object "
3049                                                 <<pointed.object_id<<": "
3050                                                 <<pointed_object->getDescription()<<std::endl;
3051
3052                                 ItemStack punchitem = playersao->getWieldedItem();
3053                                 ToolCapabilities toolcap =
3054                                                 punchitem.getToolCapabilities(m_itemdef);
3055                                 v3f dir = (pointed_object->getBasePosition() -
3056                                                 (player->getPosition() + player->getEyeOffset())
3057                                                         ).normalize();
3058                                 float time_from_last_punch =
3059                                         playersao->resetTimeFromLastPunch();
3060                                 pointed_object->punch(dir, &toolcap, playersao,
3061                                                 time_from_last_punch);
3062                         }
3063
3064                 } // action == 0
3065
3066                 /*
3067                         1: stop digging
3068                 */
3069                 else if(action == 1)
3070                 {
3071                 } // action == 1
3072
3073                 /*
3074                         2: Digging completed
3075                 */
3076                 else if(action == 2)
3077                 {
3078                         // Only digging of nodes
3079                         if(pointed.type == POINTEDTHING_NODE)
3080                         {
3081                                 MapNode n(CONTENT_IGNORE);
3082                                 try
3083                                 {
3084                                         n = m_env->getMap().getNode(p_under);
3085                                 }
3086                                 catch(InvalidPositionException &e)
3087                                 {
3088                                         infostream<<"Server: Not finishing digging: Node not found."
3089                                                         <<" Adding block to emerge queue."
3090                                                         <<std::endl;
3091                                         m_emerge_queue.addBlock(peer_id,
3092                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3093                                 }
3094
3095                                 /* Cheat prevention */
3096                                 bool is_valid_dig = true;
3097                                 if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
3098                                 {
3099                                         v3s16 nocheat_p = playersao->getNoCheatDigPos();
3100                                         float nocheat_t = playersao->getNoCheatDigTime();
3101                                         playersao->noCheatDigEnd();
3102                                         // If player didn't start digging this, ignore dig
3103                                         if(nocheat_p != p_under){
3104                                                 infostream<<"Server: NoCheat: "<<player->getName()
3105                                                                 <<" started digging "
3106                                                                 <<PP(nocheat_p)<<" and completed digging "
3107                                                                 <<PP(p_under)<<"; not digging."<<std::endl;
3108                                                 is_valid_dig = false;
3109                                         }
3110                                         // Get player's wielded item
3111                                         ItemStack playeritem;
3112                                         InventoryList *mlist = playersao->getInventory()->getList("main");
3113                                         if(mlist != NULL)
3114                                                 playeritem = mlist->getItem(playersao->getWieldIndex());
3115                                         ToolCapabilities playeritem_toolcap =
3116                                                         playeritem.getToolCapabilities(m_itemdef);
3117                                         // Get diggability and expected digging time
3118                                         DigParams params = getDigParams(m_nodedef->get(n).groups,
3119                                                         &playeritem_toolcap);
3120                                         // If can't dig, try hand
3121                                         if(!params.diggable){
3122                                                 const ItemDefinition &hand = m_itemdef->get("");
3123                                                 const ToolCapabilities *tp = hand.tool_capabilities;
3124                                                 if(tp)
3125                                                         params = getDigParams(m_nodedef->get(n).groups, tp);
3126                                         }
3127                                         // If can't dig, ignore dig
3128                                         if(!params.diggable){
3129                                                 infostream<<"Server: NoCheat: "<<player->getName()
3130                                                                 <<" completed digging "<<PP(p_under)
3131                                                                 <<", which is not diggable with tool. not digging."
3132                                                                 <<std::endl;
3133                                                 is_valid_dig = false;
3134                                         }
3135                                         // If time is considerably too short, ignore dig
3136                                         // Check time only for medium and slow timed digs
3137                                         if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
3138                                                 infostream<<"Server: NoCheat: "<<player->getName()
3139                                                                 <<" completed digging "
3140                                                                 <<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
3141                                                                 <<params.time<<"s; not digging."<<std::endl;
3142                                                 is_valid_dig = false;
3143                                         }
3144                                 }
3145
3146                                 /* Actually dig node */
3147
3148                                 if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
3149                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3150
3151                                 // Send unusual result (that is, node not being removed)
3152                                 if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3153                                 {
3154                                         // Re-send block to revert change on client-side
3155                                         RemoteClient *client = getClient(peer_id);
3156                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3157                                         client->SetBlockNotSent(blockpos);
3158                                 }
3159                         }
3160                 } // action == 2
3161
3162                 /*
3163                         3: place block or right-click object
3164                 */
3165                 else if(action == 3)
3166                 {
3167                         ItemStack item = playersao->getWieldedItem();
3168
3169                         // Reset build time counter
3170                         if(pointed.type == POINTEDTHING_NODE &&
3171                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3172                                 getClient(peer_id)->m_time_from_building = 0.0;
3173
3174                         if(pointed.type == POINTEDTHING_OBJECT)
3175                         {
3176                                 // Right click object
3177
3178                                 // Skip if object has been removed
3179                                 if(pointed_object->m_removed)
3180                                         return;
3181
3182                                 actionstream<<player->getName()<<" right-clicks object "
3183                                                 <<pointed.object_id<<": "
3184                                                 <<pointed_object->getDescription()<<std::endl;
3185
3186                                 // Do stuff
3187                                 pointed_object->rightClick(playersao);
3188                         }
3189                         else if(scriptapi_item_on_place(m_lua,
3190                                         item, playersao, pointed))
3191                         {
3192                                 // Placement was handled in lua
3193
3194                                 // Apply returned ItemStack
3195                                 playersao->setWieldedItem(item);
3196                         }
3197
3198                         // If item has node placement prediction, always send the above
3199                         // node to make sure the client knows what exactly happened
3200                         if(item.getDefinition(m_itemdef).node_placement_prediction != ""){
3201                                 RemoteClient *client = getClient(peer_id);
3202                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3203                                 client->SetBlockNotSent(blockpos);
3204                         }
3205                 } // action == 3
3206
3207                 /*
3208                         4: use
3209                 */
3210                 else if(action == 4)
3211                 {
3212                         ItemStack item = playersao->getWieldedItem();
3213
3214                         actionstream<<player->getName()<<" uses "<<item.name
3215                                         <<", pointing at "<<pointed.dump()<<std::endl;
3216
3217                         if(scriptapi_item_on_use(m_lua,
3218                                         item, playersao, pointed))
3219                         {
3220                                 // Apply returned ItemStack
3221                                 playersao->setWieldedItem(item);
3222                         }
3223
3224                 } // action == 4
3225
3226
3227                 /*
3228                         Catch invalid actions
3229                 */
3230                 else
3231                 {
3232                         infostream<<"WARNING: Server: Invalid action "
3233                                         <<action<<std::endl;
3234                 }
3235         }
3236         else if(command == TOSERVER_REMOVED_SOUNDS)
3237         {
3238                 std::string datastring((char*)&data[2], datasize-2);
3239                 std::istringstream is(datastring, std::ios_base::binary);
3240
3241                 int num = readU16(is);
3242                 for(int k=0; k<num; k++){
3243                         s32 id = readS32(is);
3244                         std::map<s32, ServerPlayingSound>::iterator i =
3245                                         m_playing_sounds.find(id);
3246                         if(i == m_playing_sounds.end())
3247                                 continue;
3248                         ServerPlayingSound &psound = i->second;
3249                         psound.clients.erase(peer_id);
3250                         if(psound.clients.size() == 0)
3251                                 m_playing_sounds.erase(i++);
3252                 }
3253         }
3254         else if(command == TOSERVER_NODEMETA_FIELDS)
3255         {
3256                 std::string datastring((char*)&data[2], datasize-2);
3257                 std::istringstream is(datastring, std::ios_base::binary);
3258
3259                 v3s16 p = readV3S16(is);
3260                 std::string formname = deSerializeString(is);
3261                 int num = readU16(is);
3262                 std::map<std::string, std::string> fields;
3263                 for(int k=0; k<num; k++){
3264                         std::string fieldname = deSerializeString(is);
3265                         std::string fieldvalue = deSerializeLongString(is);
3266                         fields[fieldname] = fieldvalue;
3267                 }
3268
3269                 // If something goes wrong, this player is to blame
3270                 RollbackScopeActor rollback_scope(m_rollback,
3271                                 std::string("player:")+player->getName());
3272
3273                 // Check the target node for rollback data; leave others unnoticed
3274                 RollbackNode rn_old(&m_env->getMap(), p, this);
3275
3276                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3277                                 playersao);
3278
3279                 // Report rollback data
3280                 RollbackNode rn_new(&m_env->getMap(), p, this);
3281                 if(rollback() && rn_new != rn_old){
3282                         RollbackAction action;
3283                         action.setSetNode(p, rn_old, rn_new);
3284                         rollback()->reportAction(action);
3285                 }
3286         }
3287         else if(command == TOSERVER_INVENTORY_FIELDS)
3288         {
3289                 std::string datastring((char*)&data[2], datasize-2);
3290                 std::istringstream is(datastring, std::ios_base::binary);
3291
3292                 std::string formname = deSerializeString(is);
3293                 int num = readU16(is);
3294                 std::map<std::string, std::string> fields;
3295                 for(int k=0; k<num; k++){
3296                         std::string fieldname = deSerializeString(is);
3297                         std::string fieldvalue = deSerializeLongString(is);
3298                         fields[fieldname] = fieldvalue;
3299                 }
3300
3301                 scriptapi_on_player_receive_fields(m_lua, playersao, formname, fields);
3302         }
3303         else
3304         {
3305                 infostream<<"Server::ProcessData(): Ignoring "
3306                                 "unknown command "<<command<<std::endl;
3307         }
3308
3309         } //try
3310         catch(SendFailedException &e)
3311         {
3312                 errorstream<<"Server::ProcessData(): SendFailedException: "
3313                                 <<"what="<<e.what()
3314                                 <<std::endl;
3315         }
3316 }
3317
3318 void Server::onMapEditEvent(MapEditEvent *event)
3319 {
3320         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3321         if(m_ignore_map_edit_events)
3322                 return;
3323         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3324                 return;
3325         MapEditEvent *e = event->clone();
3326         m_unsent_map_edit_queue.push_back(e);
3327 }
3328
3329 Inventory* Server::getInventory(const InventoryLocation &loc)
3330 {
3331         switch(loc.type){
3332         case InventoryLocation::UNDEFINED:
3333         {}
3334         break;
3335         case InventoryLocation::CURRENT_PLAYER:
3336         {}
3337         break;
3338         case InventoryLocation::PLAYER:
3339         {
3340                 Player *player = m_env->getPlayer(loc.name.c_str());
3341                 if(!player)
3342                         return NULL;
3343                 PlayerSAO *playersao = player->getPlayerSAO();
3344                 if(!playersao)
3345                         return NULL;
3346                 return playersao->getInventory();
3347         }
3348         break;
3349         case InventoryLocation::NODEMETA:
3350         {
3351                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3352                 if(!meta)
3353                         return NULL;
3354                 return meta->getInventory();
3355         }
3356         break;
3357         case InventoryLocation::DETACHED:
3358         {
3359                 if(m_detached_inventories.count(loc.name) == 0)
3360                         return NULL;
3361                 return m_detached_inventories[loc.name];
3362         }
3363         break;
3364         default:
3365                 assert(0);
3366         }
3367         return NULL;
3368 }
3369 void Server::setInventoryModified(const InventoryLocation &loc)
3370 {
3371         switch(loc.type){
3372         case InventoryLocation::UNDEFINED:
3373         {}
3374         break;
3375         case InventoryLocation::PLAYER:
3376         {
3377                 Player *player = m_env->getPlayer(loc.name.c_str());
3378                 if(!player)
3379                         return;
3380                 PlayerSAO *playersao = player->getPlayerSAO();
3381                 if(!playersao)
3382                         return;
3383                 playersao->m_inventory_not_sent = true;
3384                 playersao->m_wielded_item_not_sent = true;
3385         }
3386         break;
3387         case InventoryLocation::NODEMETA:
3388         {
3389                 v3s16 blockpos = getNodeBlockPos(loc.p);
3390
3391                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3392                 if(block)
3393                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3394
3395                 setBlockNotSent(blockpos);
3396         }
3397         break;
3398         case InventoryLocation::DETACHED:
3399         {
3400                 sendDetachedInventoryToAll(loc.name);
3401         }
3402         break;
3403         default:
3404                 assert(0);
3405         }
3406 }
3407
3408 core::list<PlayerInfo> Server::getPlayerInfo()
3409 {
3410         DSTACK(__FUNCTION_NAME);
3411         JMutexAutoLock envlock(m_env_mutex);
3412         JMutexAutoLock conlock(m_con_mutex);
3413
3414         core::list<PlayerInfo> list;
3415
3416         core::list<Player*> players = m_env->getPlayers();
3417
3418         core::list<Player*>::Iterator i;
3419         for(i = players.begin();
3420                         i != players.end(); i++)
3421         {
3422                 PlayerInfo info;
3423
3424                 Player *player = *i;
3425
3426                 try{
3427                         // Copy info from connection to info struct
3428                         info.id = player->peer_id;
3429                         info.address = m_con.GetPeerAddress(player->peer_id);
3430                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3431                 }
3432                 catch(con::PeerNotFoundException &e)
3433                 {
3434                         // Set dummy peer info
3435                         info.id = 0;
3436                         info.address = Address(0,0,0,0,0);
3437                         info.avg_rtt = 0.0;
3438                 }
3439
3440                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3441                 info.position = player->getPosition();
3442
3443                 list.push_back(info);
3444         }
3445
3446         return list;
3447 }
3448
3449
3450 void Server::peerAdded(con::Peer *peer)
3451 {
3452         DSTACK(__FUNCTION_NAME);
3453         verbosestream<<"Server::peerAdded(): peer->id="
3454                         <<peer->id<<std::endl;
3455
3456         PeerChange c;
3457         c.type = PEER_ADDED;
3458         c.peer_id = peer->id;
3459         c.timeout = false;
3460         m_peer_change_queue.push_back(c);
3461 }
3462
3463 void Server::deletingPeer(con::Peer *peer, bool timeout)
3464 {
3465         DSTACK(__FUNCTION_NAME);
3466         verbosestream<<"Server::deletingPeer(): peer->id="
3467                         <<peer->id<<", timeout="<<timeout<<std::endl;
3468
3469         PeerChange c;
3470         c.type = PEER_REMOVED;
3471         c.peer_id = peer->id;
3472         c.timeout = timeout;
3473         m_peer_change_queue.push_back(c);
3474 }
3475
3476 /*
3477         Static send methods
3478 */
3479
3480 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3481 {
3482         DSTACK(__FUNCTION_NAME);
3483         std::ostringstream os(std::ios_base::binary);
3484
3485         writeU16(os, TOCLIENT_HP);
3486         writeU8(os, hp);
3487
3488         // Make data buffer
3489         std::string s = os.str();
3490         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3491         // Send as reliable
3492         con.Send(peer_id, 0, data, true);
3493 }
3494
3495 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3496                 const std::wstring &reason)
3497 {
3498         DSTACK(__FUNCTION_NAME);
3499         std::ostringstream os(std::ios_base::binary);
3500
3501         writeU16(os, TOCLIENT_ACCESS_DENIED);
3502         os<<serializeWideString(reason);
3503
3504         // Make data buffer
3505         std::string s = os.str();
3506         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3507         // Send as reliable
3508         con.Send(peer_id, 0, data, true);
3509 }
3510
3511 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3512                 bool set_camera_point_target, v3f camera_point_target)
3513 {
3514         DSTACK(__FUNCTION_NAME);
3515         std::ostringstream os(std::ios_base::binary);
3516
3517         writeU16(os, TOCLIENT_DEATHSCREEN);
3518         writeU8(os, set_camera_point_target);
3519         writeV3F1000(os, camera_point_target);
3520
3521         // Make data buffer
3522         std::string s = os.str();
3523         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3524         // Send as reliable
3525         con.Send(peer_id, 0, data, true);
3526 }
3527
3528 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3529                 IItemDefManager *itemdef)
3530 {
3531         DSTACK(__FUNCTION_NAME);
3532         std::ostringstream os(std::ios_base::binary);
3533
3534         /*
3535                 u16 command
3536                 u32 length of the next item
3537                 zlib-compressed serialized ItemDefManager
3538         */
3539         writeU16(os, TOCLIENT_ITEMDEF);
3540         std::ostringstream tmp_os(std::ios::binary);
3541         itemdef->serialize(tmp_os);
3542         std::ostringstream tmp_os2(std::ios::binary);
3543         compressZlib(tmp_os.str(), tmp_os2);
3544         os<<serializeLongString(tmp_os2.str());
3545
3546         // Make data buffer
3547         std::string s = os.str();
3548         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3549                         <<"): size="<<s.size()<<std::endl;
3550         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3551         // Send as reliable
3552         con.Send(peer_id, 0, data, true);
3553 }
3554
3555 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3556                 INodeDefManager *nodedef, u16 protocol_version)
3557 {
3558         DSTACK(__FUNCTION_NAME);
3559         std::ostringstream os(std::ios_base::binary);
3560
3561         /*
3562                 u16 command
3563                 u32 length of the next item
3564                 zlib-compressed serialized NodeDefManager
3565         */
3566         writeU16(os, TOCLIENT_NODEDEF);
3567         std::ostringstream tmp_os(std::ios::binary);
3568         nodedef->serialize(tmp_os, protocol_version);
3569         std::ostringstream tmp_os2(std::ios::binary);
3570         compressZlib(tmp_os.str(), tmp_os2);
3571         os<<serializeLongString(tmp_os2.str());
3572
3573         // Make data buffer
3574         std::string s = os.str();
3575         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3576                         <<"): size="<<s.size()<<std::endl;
3577         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3578         // Send as reliable
3579         con.Send(peer_id, 0, data, true);
3580 }
3581
3582 /*
3583         Non-static send methods
3584 */
3585
3586 void Server::SendInventory(u16 peer_id)
3587 {
3588         DSTACK(__FUNCTION_NAME);
3589
3590         PlayerSAO *playersao = getPlayerSAO(peer_id);
3591         assert(playersao);
3592
3593         playersao->m_inventory_not_sent = false;
3594
3595         /*
3596                 Serialize it
3597         */
3598
3599         std::ostringstream os;
3600         playersao->getInventory()->serialize(os);
3601
3602         std::string s = os.str();
3603
3604         SharedBuffer<u8> data(s.size()+2);
3605         writeU16(&data[0], TOCLIENT_INVENTORY);
3606         memcpy(&data[2], s.c_str(), s.size());
3607
3608         // Send as reliable
3609         m_con.Send(peer_id, 0, data, true);
3610 }
3611
3612 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3613 {
3614         DSTACK(__FUNCTION_NAME);
3615
3616         std::ostringstream os(std::ios_base::binary);
3617         u8 buf[12];
3618
3619         // Write command
3620         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3621         os.write((char*)buf, 2);
3622
3623         // Write length
3624         writeU16(buf, message.size());
3625         os.write((char*)buf, 2);
3626
3627         // Write string
3628         for(u32 i=0; i<message.size(); i++)
3629         {
3630                 u16 w = message[i];
3631                 writeU16(buf, w);
3632                 os.write((char*)buf, 2);
3633         }
3634
3635         // Make data buffer
3636         std::string s = os.str();
3637         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3638         // Send as reliable
3639         m_con.Send(peer_id, 0, data, true);
3640 }
3641
3642 void Server::BroadcastChatMessage(const std::wstring &message)
3643 {
3644         for(core::map<u16, RemoteClient*>::Iterator
3645                 i = m_clients.getIterator();
3646                 i.atEnd() == false; i++)
3647         {
3648                 // Get client and check that it is valid
3649                 RemoteClient *client = i.getNode()->getValue();
3650                 assert(client->peer_id == i.getNode()->getKey());
3651                 if(client->serialization_version == SER_FMT_VER_INVALID)
3652                         continue;
3653
3654                 SendChatMessage(client->peer_id, message);
3655         }
3656 }
3657
3658 void Server::SendPlayerHP(u16 peer_id)
3659 {
3660         DSTACK(__FUNCTION_NAME);
3661         PlayerSAO *playersao = getPlayerSAO(peer_id);
3662         assert(playersao);
3663         playersao->m_hp_not_sent = false;
3664         SendHP(m_con, peer_id, playersao->getHP());
3665 }
3666
3667 void Server::SendMovePlayer(u16 peer_id)
3668 {
3669         DSTACK(__FUNCTION_NAME);
3670         Player *player = m_env->getPlayer(peer_id);
3671         assert(player);
3672
3673         std::ostringstream os(std::ios_base::binary);
3674         writeU16(os, TOCLIENT_MOVE_PLAYER);
3675         writeV3F1000(os, player->getPosition());
3676         writeF1000(os, player->getPitch());
3677         writeF1000(os, player->getYaw());
3678
3679         {
3680                 v3f pos = player->getPosition();
3681                 f32 pitch = player->getPitch();
3682                 f32 yaw = player->getYaw();
3683                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3684                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3685                                 <<" pitch="<<pitch
3686                                 <<" yaw="<<yaw
3687                                 <<std::endl;
3688         }
3689
3690         // Make data buffer
3691         std::string s = os.str();
3692         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3693         // Send as reliable
3694         m_con.Send(peer_id, 0, data, true);
3695 }
3696
3697 void Server::SendPlayerPrivileges(u16 peer_id)
3698 {
3699         Player *player = m_env->getPlayer(peer_id);
3700         assert(player);
3701         if(player->peer_id == PEER_ID_INEXISTENT)
3702                 return;
3703
3704         std::set<std::string> privs;
3705         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3706
3707         std::ostringstream os(std::ios_base::binary);
3708         writeU16(os, TOCLIENT_PRIVILEGES);
3709         writeU16(os, privs.size());
3710         for(std::set<std::string>::const_iterator i = privs.begin();
3711                         i != privs.end(); i++){
3712                 os<<serializeString(*i);
3713         }
3714
3715         // Make data buffer
3716         std::string s = os.str();
3717         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3718         // Send as reliable
3719         m_con.Send(peer_id, 0, data, true);
3720 }
3721
3722 void Server::SendPlayerInventoryFormspec(u16 peer_id)
3723 {
3724         Player *player = m_env->getPlayer(peer_id);
3725         assert(player);
3726         if(player->peer_id == PEER_ID_INEXISTENT)
3727                 return;
3728
3729         std::ostringstream os(std::ios_base::binary);
3730         writeU16(os, TOCLIENT_INVENTORY_FORMSPEC);
3731         os<<serializeLongString(player->inventory_formspec);
3732
3733         // Make data buffer
3734         std::string s = os.str();
3735         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3736         // Send as reliable
3737         m_con.Send(peer_id, 0, data, true);
3738 }
3739
3740 s32 Server::playSound(const SimpleSoundSpec &spec,
3741                 const ServerSoundParams &params)
3742 {
3743         // Find out initial position of sound
3744         bool pos_exists = false;
3745         v3f pos = params.getPos(m_env, &pos_exists);
3746         // If position is not found while it should be, cancel sound
3747         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3748                 return -1;
3749         // Filter destination clients
3750         std::set<RemoteClient*> dst_clients;
3751         if(params.to_player != "")
3752         {
3753                 Player *player = m_env->getPlayer(params.to_player.c_str());
3754                 if(!player){
3755                         infostream<<"Server::playSound: Player \""<<params.to_player
3756                                         <<"\" not found"<<std::endl;
3757                         return -1;
3758                 }
3759                 if(player->peer_id == PEER_ID_INEXISTENT){
3760                         infostream<<"Server::playSound: Player \""<<params.to_player
3761                                         <<"\" not connected"<<std::endl;
3762                         return -1;
3763                 }
3764                 RemoteClient *client = getClient(player->peer_id);
3765                 dst_clients.insert(client);
3766         }
3767         else
3768         {
3769                 for(core::map<u16, RemoteClient*>::Iterator
3770                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3771                 {
3772                         RemoteClient *client = i.getNode()->getValue();
3773                         Player *player = m_env->getPlayer(client->peer_id);
3774                         if(!player)
3775                                 continue;
3776                         if(pos_exists){
3777                                 if(player->getPosition().getDistanceFrom(pos) >
3778                                                 params.max_hear_distance)
3779                                         continue;
3780                         }
3781                         dst_clients.insert(client);
3782                 }
3783         }
3784         if(dst_clients.size() == 0)
3785                 return -1;
3786         // Create the sound
3787         s32 id = m_next_sound_id++;
3788         // The sound will exist as a reference in m_playing_sounds
3789         m_playing_sounds[id] = ServerPlayingSound();
3790         ServerPlayingSound &psound = m_playing_sounds[id];
3791         psound.params = params;
3792         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3793                         i != dst_clients.end(); i++)
3794                 psound.clients.insert((*i)->peer_id);
3795         // Create packet
3796         std::ostringstream os(std::ios_base::binary);
3797         writeU16(os, TOCLIENT_PLAY_SOUND);
3798         writeS32(os, id);
3799         os<<serializeString(spec.name);
3800         writeF1000(os, spec.gain * params.gain);
3801         writeU8(os, params.type);
3802         writeV3F1000(os, pos);
3803         writeU16(os, params.object);
3804         writeU8(os, params.loop);
3805         // Make data buffer
3806         std::string s = os.str();
3807         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3808         // Send
3809         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3810                         i != dst_clients.end(); i++){
3811                 // Send as reliable
3812                 m_con.Send((*i)->peer_id, 0, data, true);
3813         }
3814         return id;
3815 }
3816 void Server::stopSound(s32 handle)
3817 {
3818         // Get sound reference
3819         std::map<s32, ServerPlayingSound>::iterator i =
3820                         m_playing_sounds.find(handle);
3821         if(i == m_playing_sounds.end())
3822                 return;
3823         ServerPlayingSound &psound = i->second;
3824         // Create packet
3825         std::ostringstream os(std::ios_base::binary);
3826         writeU16(os, TOCLIENT_STOP_SOUND);
3827         writeS32(os, handle);
3828         // Make data buffer
3829         std::string s = os.str();
3830         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3831         // Send
3832         for(std::set<u16>::iterator i = psound.clients.begin();
3833                         i != psound.clients.end(); i++){
3834                 // Send as reliable
3835                 m_con.Send(*i, 0, data, true);
3836         }
3837         // Remove sound reference
3838         m_playing_sounds.erase(i);
3839 }
3840
3841 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3842         core::list<u16> *far_players, float far_d_nodes)
3843 {
3844         float maxd = far_d_nodes*BS;
3845         v3f p_f = intToFloat(p, BS);
3846
3847         // Create packet
3848         u32 replysize = 8;
3849         SharedBuffer<u8> reply(replysize);
3850         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3851         writeS16(&reply[2], p.X);
3852         writeS16(&reply[4], p.Y);
3853         writeS16(&reply[6], p.Z);
3854
3855         for(core::map<u16, RemoteClient*>::Iterator
3856                 i = m_clients.getIterator();
3857                 i.atEnd() == false; i++)
3858         {
3859                 // Get client and check that it is valid
3860                 RemoteClient *client = i.getNode()->getValue();
3861                 assert(client->peer_id == i.getNode()->getKey());
3862                 if(client->serialization_version == SER_FMT_VER_INVALID)
3863                         continue;
3864
3865                 // Don't send if it's the same one
3866                 if(client->peer_id == ignore_id)
3867                         continue;
3868
3869                 if(far_players)
3870                 {
3871                         // Get player
3872                         Player *player = m_env->getPlayer(client->peer_id);
3873                         if(player)
3874                         {
3875                                 // If player is far away, only set modified blocks not sent
3876                                 v3f player_pos = player->getPosition();
3877                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3878                                 {
3879                                         far_players->push_back(client->peer_id);
3880                                         continue;
3881                                 }
3882                         }
3883                 }
3884
3885                 // Send as reliable
3886                 m_con.Send(client->peer_id, 0, reply, true);
3887         }
3888 }
3889
3890 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3891                 core::list<u16> *far_players, float far_d_nodes)
3892 {
3893         float maxd = far_d_nodes*BS;
3894         v3f p_f = intToFloat(p, BS);
3895
3896         for(core::map<u16, RemoteClient*>::Iterator
3897                 i = m_clients.getIterator();
3898                 i.atEnd() == false; i++)
3899         {
3900                 // Get client and check that it is valid
3901                 RemoteClient *client = i.getNode()->getValue();
3902                 assert(client->peer_id == i.getNode()->getKey());
3903                 if(client->serialization_version == SER_FMT_VER_INVALID)
3904                         continue;
3905
3906                 // Don't send if it's the same one
3907                 if(client->peer_id == ignore_id)
3908                         continue;
3909
3910                 if(far_players)
3911                 {
3912                         // Get player
3913                         Player *player = m_env->getPlayer(client->peer_id);
3914                         if(player)
3915                         {
3916                                 // If player is far away, only set modified blocks not sent
3917                                 v3f player_pos = player->getPosition();
3918                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3919                                 {
3920                                         far_players->push_back(client->peer_id);
3921                                         continue;
3922                                 }
3923                         }
3924                 }
3925
3926                 // Create packet
3927                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3928                 SharedBuffer<u8> reply(replysize);
3929                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3930                 writeS16(&reply[2], p.X);
3931                 writeS16(&reply[4], p.Y);
3932                 writeS16(&reply[6], p.Z);
3933                 n.serialize(&reply[8], client->serialization_version);
3934
3935                 // Send as reliable
3936                 m_con.Send(client->peer_id, 0, reply, true);
3937         }
3938 }
3939
3940 void Server::setBlockNotSent(v3s16 p)
3941 {
3942         for(core::map<u16, RemoteClient*>::Iterator
3943                 i = m_clients.getIterator();
3944                 i.atEnd()==false; i++)
3945         {
3946                 RemoteClient *client = i.getNode()->getValue();
3947                 client->SetBlockNotSent(p);
3948         }
3949 }
3950
3951 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3952 {
3953         DSTACK(__FUNCTION_NAME);
3954
3955         v3s16 p = block->getPos();
3956
3957 #if 0
3958         // Analyze it a bit
3959         bool completely_air = true;
3960         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3961         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3962         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3963         {
3964                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3965                 {
3966                         completely_air = false;
3967                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3968                 }
3969         }
3970
3971         // Print result
3972         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3973         if(completely_air)
3974                 infostream<<"[completely air] ";
3975         infostream<<std::endl;
3976 #endif
3977
3978         /*
3979                 Create a packet with the block in the right format
3980         */
3981
3982         std::ostringstream os(std::ios_base::binary);
3983         block->serialize(os, ver, false);
3984         std::string s = os.str();
3985         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3986
3987         u32 replysize = 8 + blockdata.getSize();
3988         SharedBuffer<u8> reply(replysize);
3989         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3990         writeS16(&reply[2], p.X);
3991         writeS16(&reply[4], p.Y);
3992         writeS16(&reply[6], p.Z);
3993         memcpy(&reply[8], *blockdata, blockdata.getSize());
3994
3995         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3996                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3997
3998         /*
3999                 Send packet
4000         */
4001         m_con.Send(peer_id, 1, reply, true);
4002 }
4003
4004 void Server::SendBlocks(float dtime)
4005 {
4006         DSTACK(__FUNCTION_NAME);
4007
4008         JMutexAutoLock envlock(m_env_mutex);
4009         JMutexAutoLock conlock(m_con_mutex);
4010
4011         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
4012
4013         core::array<PrioritySortedBlockTransfer> queue;
4014
4015         s32 total_sending = 0;
4016
4017         {
4018                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
4019
4020                 for(core::map<u16, RemoteClient*>::Iterator
4021                         i = m_clients.getIterator();
4022                         i.atEnd() == false; i++)
4023                 {
4024                         RemoteClient *client = i.getNode()->getValue();
4025                         assert(client->peer_id == i.getNode()->getKey());
4026
4027                         // If definitions and textures have not been sent, don't
4028                         // send MapBlocks either
4029                         if(!client->definitions_sent)
4030                                 continue;
4031
4032                         total_sending += client->SendingCount();
4033
4034                         if(client->serialization_version == SER_FMT_VER_INVALID)
4035                                 continue;
4036
4037                         client->GetNextBlocks(this, dtime, queue);
4038                 }
4039         }
4040
4041         // Sort.
4042         // Lowest priority number comes first.
4043         // Lowest is most important.
4044         queue.sort();
4045
4046         for(u32 i=0; i<queue.size(); i++)
4047         {
4048                 //TODO: Calculate limit dynamically
4049                 if(total_sending >= g_settings->getS32
4050                                 ("max_simultaneous_block_sends_server_total"))
4051                         break;
4052
4053                 PrioritySortedBlockTransfer q = queue[i];
4054
4055                 MapBlock *block = NULL;
4056                 try
4057                 {
4058                         block = m_env->getMap().getBlockNoCreate(q.pos);
4059                 }
4060                 catch(InvalidPositionException &e)
4061                 {
4062                         continue;
4063                 }
4064
4065                 RemoteClient *client = getClient(q.peer_id);
4066
4067                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
4068
4069                 client->SentBlock(q.pos);
4070
4071                 total_sending++;
4072         }
4073 }
4074
4075 void Server::fillMediaCache()
4076 {
4077         DSTACK(__FUNCTION_NAME);
4078
4079         infostream<<"Server: Calculating media file checksums"<<std::endl;
4080
4081         // Collect all media file paths
4082         std::list<std::string> paths;
4083         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4084                         i != m_mods.end(); i++){
4085                 const ModSpec &mod = *i;
4086                 paths.push_back(mod.path + DIR_DELIM + "textures");
4087                 paths.push_back(mod.path + DIR_DELIM + "sounds");
4088                 paths.push_back(mod.path + DIR_DELIM + "media");
4089                 paths.push_back(mod.path + DIR_DELIM + "models");
4090         }
4091         std::string path_all = "textures";
4092         paths.push_back(path_all + DIR_DELIM + "all");
4093
4094         // Collect media file information from paths into cache
4095         for(std::list<std::string>::iterator i = paths.begin();
4096                         i != paths.end(); i++)
4097         {
4098                 std::string mediapath = *i;
4099                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
4100                 for(u32 j=0; j<dirlist.size(); j++){
4101                         if(dirlist[j].dir) // Ignode dirs
4102                                 continue;
4103                         std::string filename = dirlist[j].name;
4104                         // If name contains illegal characters, ignore the file
4105                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
4106                                 infostream<<"Server: ignoring illegal file name: \""
4107                                                 <<filename<<"\""<<std::endl;
4108                                 continue;
4109                         }
4110                         // If name is not in a supported format, ignore it
4111                         const char *supported_ext[] = {
4112                                 ".png", ".jpg", ".bmp", ".tga",
4113                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
4114                                 ".ogg",
4115                                 ".x", ".b3d", ".md2", ".obj",
4116                                 NULL
4117                         };
4118                         if(removeStringEnd(filename, supported_ext) == ""){
4119                                 infostream<<"Server: ignoring unsupported file extension: \""
4120                                                 <<filename<<"\""<<std::endl;
4121                                 continue;
4122                         }
4123                         // Ok, attempt to load the file and add to cache
4124                         std::string filepath = mediapath + DIR_DELIM + filename;
4125                         // Read data
4126                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
4127                         if(fis.good() == false){
4128                                 errorstream<<"Server::fillMediaCache(): Could not open \""
4129                                                 <<filename<<"\" for reading"<<std::endl;
4130                                 continue;
4131                         }
4132                         std::ostringstream tmp_os(std::ios_base::binary);
4133                         bool bad = false;
4134                         for(;;){
4135                                 char buf[1024];
4136                                 fis.read(buf, 1024);
4137                                 std::streamsize len = fis.gcount();
4138                                 tmp_os.write(buf, len);
4139                                 if(fis.eof())
4140                                         break;
4141                                 if(!fis.good()){
4142                                         bad = true;
4143                                         break;
4144                                 }
4145                         }
4146                         if(bad){
4147                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
4148                                                 <<filename<<"\""<<std::endl;
4149                                 continue;
4150                         }
4151                         if(tmp_os.str().length() == 0){
4152                                 errorstream<<"Server::fillMediaCache(): Empty file \""
4153                                                 <<filepath<<"\""<<std::endl;
4154                                 continue;
4155                         }
4156
4157                         SHA1 sha1;
4158                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
4159
4160                         unsigned char *digest = sha1.getDigest();
4161                         std::string sha1_base64 = base64_encode(digest, 20);
4162                         std::string sha1_hex = hex_encode((char*)digest, 20);
4163                         free(digest);
4164
4165                         // Put in list
4166                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4167                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4168                 }
4169         }
4170 }
4171
4172 struct SendableMediaAnnouncement
4173 {
4174         std::string name;
4175         std::string sha1_digest;
4176
4177         SendableMediaAnnouncement(const std::string name_="",
4178                         const std::string sha1_digest_=""):
4179                 name(name_),
4180                 sha1_digest(sha1_digest_)
4181         {}
4182 };
4183
4184 void Server::sendMediaAnnouncement(u16 peer_id)
4185 {
4186         DSTACK(__FUNCTION_NAME);
4187
4188         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4189                         <<std::endl;
4190
4191         core::list<SendableMediaAnnouncement> file_announcements;
4192
4193         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4194                         i != m_media.end(); i++){
4195                 // Put in list
4196                 file_announcements.push_back(
4197                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4198         }
4199
4200         // Make packet
4201         std::ostringstream os(std::ios_base::binary);
4202
4203         /*
4204                 u16 command
4205                 u32 number of files
4206                 for each texture {
4207                         u16 length of name
4208                         string name
4209                         u16 length of sha1_digest
4210                         string sha1_digest
4211                 }
4212         */
4213
4214         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4215         writeU16(os, file_announcements.size());
4216
4217         for(core::list<SendableMediaAnnouncement>::Iterator
4218                         j = file_announcements.begin();
4219                         j != file_announcements.end(); j++){
4220                 os<<serializeString(j->name);
4221                 os<<serializeString(j->sha1_digest);
4222         }
4223
4224         // Make data buffer
4225         std::string s = os.str();
4226         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4227
4228         // Send as reliable
4229         m_con.Send(peer_id, 0, data, true);
4230
4231 }
4232
4233 struct SendableMedia
4234 {
4235         std::string name;
4236         std::string path;
4237         std::string data;
4238
4239         SendableMedia(const std::string &name_="", const std::string path_="",
4240                         const std::string &data_=""):
4241                 name(name_),
4242                 path(path_),
4243                 data(data_)
4244         {}
4245 };
4246
4247 void Server::sendRequestedMedia(u16 peer_id,
4248                 const core::list<MediaRequest> &tosend)
4249 {
4250         DSTACK(__FUNCTION_NAME);
4251
4252         verbosestream<<"Server::sendRequestedMedia(): "
4253                         <<"Sending files to client"<<std::endl;
4254
4255         /* Read files */
4256
4257         // Put 5kB in one bunch (this is not accurate)
4258         u32 bytes_per_bunch = 5000;
4259
4260         core::array< core::list<SendableMedia> > file_bunches;
4261         file_bunches.push_back(core::list<SendableMedia>());
4262
4263         u32 file_size_bunch_total = 0;
4264
4265         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4266                         i != tosend.end(); i++)
4267         {
4268                 if(m_media.find(i->name) == m_media.end()){
4269                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4270                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4271                         continue;
4272                 }
4273
4274                 //TODO get path + name
4275                 std::string tpath = m_media[(*i).name].path;
4276
4277                 // Read data
4278                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4279                 if(fis.good() == false){
4280                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4281                                         <<tpath<<"\" for reading"<<std::endl;
4282                         continue;
4283                 }
4284                 std::ostringstream tmp_os(std::ios_base::binary);
4285                 bool bad = false;
4286                 for(;;){
4287                         char buf[1024];
4288                         fis.read(buf, 1024);
4289                         std::streamsize len = fis.gcount();
4290                         tmp_os.write(buf, len);
4291                         file_size_bunch_total += len;
4292                         if(fis.eof())
4293                                 break;
4294                         if(!fis.good()){
4295                                 bad = true;
4296                                 break;
4297                         }
4298                 }
4299                 if(bad){
4300                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4301                                         <<(*i).name<<"\""<<std::endl;
4302                         continue;
4303                 }
4304                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4305                                 <<tname<<"\""<<std::endl;*/
4306                 // Put in list
4307                 file_bunches[file_bunches.size()-1].push_back(
4308                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4309
4310                 // Start next bunch if got enough data
4311                 if(file_size_bunch_total >= bytes_per_bunch){
4312                         file_bunches.push_back(core::list<SendableMedia>());
4313                         file_size_bunch_total = 0;
4314                 }
4315
4316         }
4317
4318         /* Create and send packets */
4319
4320         u32 num_bunches = file_bunches.size();
4321         for(u32 i=0; i<num_bunches; i++)
4322         {
4323                 std::ostringstream os(std::ios_base::binary);
4324
4325                 /*
4326                         u16 command
4327                         u16 total number of texture bunches
4328                         u16 index of this bunch
4329                         u32 number of files in this bunch
4330                         for each file {
4331                                 u16 length of name
4332                                 string name
4333                                 u32 length of data
4334                                 data
4335                         }
4336                 */
4337
4338                 writeU16(os, TOCLIENT_MEDIA);
4339                 writeU16(os, num_bunches);
4340                 writeU16(os, i);
4341                 writeU32(os, file_bunches[i].size());
4342
4343                 for(core::list<SendableMedia>::Iterator
4344                                 j = file_bunches[i].begin();
4345                                 j != file_bunches[i].end(); j++){
4346                         os<<serializeString(j->name);
4347                         os<<serializeLongString(j->data);
4348                 }
4349
4350                 // Make data buffer
4351                 std::string s = os.str();
4352                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4353                                 <<i<<"/"<<num_bunches
4354                                 <<" files="<<file_bunches[i].size()
4355                                 <<" size=" <<s.size()<<std::endl;
4356                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4357                 // Send as reliable
4358                 m_con.Send(peer_id, 0, data, true);
4359         }
4360 }
4361
4362 void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
4363 {
4364         if(m_detached_inventories.count(name) == 0){
4365                 errorstream<<__FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
4366                 return;
4367         }
4368         Inventory *inv = m_detached_inventories[name];
4369
4370         std::ostringstream os(std::ios_base::binary);
4371         writeU16(os, TOCLIENT_DETACHED_INVENTORY);
4372         os<<serializeString(name);
4373         inv->serialize(os);
4374
4375         // Make data buffer
4376         std::string s = os.str();
4377         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4378         // Send as reliable
4379         m_con.Send(peer_id, 0, data, true);
4380 }
4381
4382 void Server::sendDetachedInventoryToAll(const std::string &name)
4383 {
4384         DSTACK(__FUNCTION_NAME);
4385
4386         for(core::map<u16, RemoteClient*>::Iterator
4387                         i = m_clients.getIterator();
4388                         i.atEnd() == false; i++){
4389                 RemoteClient *client = i.getNode()->getValue();
4390                 sendDetachedInventory(name, client->peer_id);
4391         }
4392 }
4393
4394 void Server::sendDetachedInventories(u16 peer_id)
4395 {
4396         DSTACK(__FUNCTION_NAME);
4397
4398         for(std::map<std::string, Inventory*>::iterator
4399                         i = m_detached_inventories.begin();
4400                         i != m_detached_inventories.end(); i++){
4401                 const std::string &name = i->first;
4402                 //Inventory *inv = i->second;
4403                 sendDetachedInventory(name, peer_id);
4404         }
4405 }
4406
4407 /*
4408         Something random
4409 */
4410
4411 void Server::DiePlayer(u16 peer_id)
4412 {
4413         DSTACK(__FUNCTION_NAME);
4414
4415         PlayerSAO *playersao = getPlayerSAO(peer_id);
4416         assert(playersao);
4417
4418         infostream<<"Server::DiePlayer(): Player "
4419                         <<playersao->getPlayer()->getName()
4420                         <<" dies"<<std::endl;
4421
4422         playersao->setHP(0);
4423
4424         // Trigger scripted stuff
4425         scriptapi_on_dieplayer(m_lua, playersao);
4426
4427         SendPlayerHP(peer_id);
4428         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4429 }
4430
4431 void Server::RespawnPlayer(u16 peer_id)
4432 {
4433         DSTACK(__FUNCTION_NAME);
4434
4435         PlayerSAO *playersao = getPlayerSAO(peer_id);
4436         assert(playersao);
4437
4438         infostream<<"Server::RespawnPlayer(): Player "
4439                         <<playersao->getPlayer()->getName()
4440                         <<" respawns"<<std::endl;
4441
4442         playersao->setHP(PLAYER_MAX_HP);
4443
4444         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4445         if(!repositioned){
4446                 v3f pos = findSpawnPos(m_env->getServerMap());
4447                 playersao->setPos(pos);
4448         }
4449 }
4450
4451 void Server::UpdateCrafting(u16 peer_id)
4452 {
4453         DSTACK(__FUNCTION_NAME);
4454
4455         Player* player = m_env->getPlayer(peer_id);
4456         assert(player);
4457
4458         // Get a preview for crafting
4459         ItemStack preview;
4460         getCraftingResult(&player->inventory, preview, false, this);
4461
4462         // Put the new preview in
4463         InventoryList *plist = player->inventory.getList("craftpreview");
4464         assert(plist);
4465         assert(plist->getSize() >= 1);
4466         plist->changeItem(0, preview);
4467 }
4468
4469 RemoteClient* Server::getClient(u16 peer_id)
4470 {
4471         DSTACK(__FUNCTION_NAME);
4472         //JMutexAutoLock lock(m_con_mutex);
4473         core::map<u16, RemoteClient*>::Node *n;
4474         n = m_clients.find(peer_id);
4475         // A client should exist for all peers
4476         assert(n != NULL);
4477         return n->getValue();
4478 }
4479
4480 std::wstring Server::getStatusString()
4481 {
4482         std::wostringstream os(std::ios_base::binary);
4483         os<<L"# Server: ";
4484         // Version
4485         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4486         // Uptime
4487         os<<L", uptime="<<m_uptime.get();
4488         // Information about clients
4489         core::map<u16, RemoteClient*>::Iterator i;
4490         bool first;
4491         os<<L", clients={";
4492         for(i = m_clients.getIterator(), first = true;
4493                 i.atEnd() == false; i++)
4494         {
4495                 // Get client and check that it is valid
4496                 RemoteClient *client = i.getNode()->getValue();
4497                 assert(client->peer_id == i.getNode()->getKey());
4498                 if(client->serialization_version == SER_FMT_VER_INVALID)
4499                         continue;
4500                 // Get player
4501                 Player *player = m_env->getPlayer(client->peer_id);
4502                 // Get name of player
4503                 std::wstring name = L"unknown";
4504                 if(player != NULL)
4505                         name = narrow_to_wide(player->getName());
4506                 // Add name to information string
4507                 if(!first)
4508                         os<<L",";
4509                 else
4510                         first = false;
4511                 os<<name;
4512         }
4513         os<<L"}";
4514         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4515                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4516         if(g_settings->get("motd") != "")
4517                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4518         return os.str();
4519 }
4520
4521 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4522 {
4523         std::set<std::string> privs;
4524         scriptapi_get_auth(m_lua, name, NULL, &privs);
4525         return privs;
4526 }
4527
4528 bool Server::checkPriv(const std::string &name, const std::string &priv)
4529 {
4530         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4531         return (privs.count(priv) != 0);
4532 }
4533
4534 void Server::reportPrivsModified(const std::string &name)
4535 {
4536         if(name == ""){
4537                 for(core::map<u16, RemoteClient*>::Iterator
4538                                 i = m_clients.getIterator();
4539                                 i.atEnd() == false; i++){
4540                         RemoteClient *client = i.getNode()->getValue();
4541                         Player *player = m_env->getPlayer(client->peer_id);
4542                         reportPrivsModified(player->getName());
4543                 }
4544         } else {
4545                 Player *player = m_env->getPlayer(name.c_str());
4546                 if(!player)
4547                         return;
4548                 SendPlayerPrivileges(player->peer_id);
4549                 PlayerSAO *sao = player->getPlayerSAO();
4550                 if(!sao)
4551                         return;
4552                 sao->updatePrivileges(
4553                                 getPlayerEffectivePrivs(name),
4554                                 isSingleplayer());
4555         }
4556 }
4557
4558 void Server::reportInventoryFormspecModified(const std::string &name)
4559 {
4560         Player *player = m_env->getPlayer(name.c_str());
4561         if(!player)
4562                 return;
4563         SendPlayerInventoryFormspec(player->peer_id);
4564 }
4565
4566 // Saves g_settings to configpath given at initialization
4567 void Server::saveConfig()
4568 {
4569         if(m_path_config != "")
4570                 g_settings->updateConfigFile(m_path_config.c_str());
4571 }
4572
4573 void Server::notifyPlayer(const char *name, const std::wstring msg)
4574 {
4575         Player *player = m_env->getPlayer(name);
4576         if(!player)
4577                 return;
4578         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4579 }
4580
4581 void Server::notifyPlayers(const std::wstring msg)
4582 {
4583         BroadcastChatMessage(msg);
4584 }
4585
4586 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4587 {
4588         u8 flags = 0;
4589         if(!allow_generate)
4590                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4591         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4592 }
4593
4594 Inventory* Server::createDetachedInventory(const std::string &name)
4595 {
4596         if(m_detached_inventories.count(name) > 0){
4597                 infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
4598                 delete m_detached_inventories[name];
4599         } else {
4600                 infostream<<"Server creating detached inventory \""<<name<<"\""<<std::endl;
4601         }
4602         Inventory *inv = new Inventory(m_itemdef);
4603         assert(inv);
4604         m_detached_inventories[name] = inv;
4605         sendDetachedInventoryToAll(name);
4606         return inv;
4607 }
4608
4609 class BoolScopeSet
4610 {
4611 public:
4612         BoolScopeSet(bool *dst, bool val):
4613                 m_dst(dst)
4614         {
4615                 m_orig_state = *m_dst;
4616                 *m_dst = val;
4617         }
4618         ~BoolScopeSet()
4619         {
4620                 *m_dst = m_orig_state;
4621         }
4622 private:
4623         bool *m_dst;
4624         bool m_orig_state;
4625 };
4626
4627 // actions: time-reversed list
4628 // Return value: success/failure
4629 bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
4630                 std::list<std::string> *log)
4631 {
4632         infostream<<"Server::rollbackRevertActions(len="<<actions.size()<<")"<<std::endl;
4633         ServerMap *map = (ServerMap*)(&m_env->getMap());
4634         // Disable rollback report sink while reverting
4635         BoolScopeSet rollback_scope_disable(&m_rollback_sink_enabled, false);
4636
4637         // Fail if no actions to handle
4638         if(actions.empty()){
4639                 log->push_back("Nothing to do.");
4640                 return false;
4641         }
4642
4643         int num_tried = 0;
4644         int num_failed = 0;
4645
4646         for(std::list<RollbackAction>::const_iterator
4647                         i = actions.begin();
4648                         i != actions.end(); i++)
4649         {
4650                 const RollbackAction &action = *i;
4651                 num_tried++;
4652                 bool success = action.applyRevert(map, this, this);
4653                 if(!success){
4654                         num_failed++;
4655                         std::ostringstream os;
4656                         os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
4657                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4658                         if(log)
4659                                 log->push_back(os.str());
4660                 }else{
4661                         std::ostringstream os;
4662                         os<<"Succesfully reverted step ("<<num_tried<<") "<<action.toString();
4663                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4664                         if(log)
4665                                 log->push_back(os.str());
4666                 }
4667         }
4668
4669         infostream<<"Map::rollbackRevertActions(): "<<num_failed<<"/"<<num_tried
4670                         <<" failed"<<std::endl;
4671
4672         // Call it done if less than half failed
4673         return num_failed <= num_tried/2;
4674 }
4675
4676 // IGameDef interface
4677 // Under envlock
4678 IItemDefManager* Server::getItemDefManager()
4679 {
4680         return m_itemdef;
4681 }
4682 INodeDefManager* Server::getNodeDefManager()
4683 {
4684         return m_nodedef;
4685 }
4686 ICraftDefManager* Server::getCraftDefManager()
4687 {
4688         return m_craftdef;
4689 }
4690 ITextureSource* Server::getTextureSource()
4691 {
4692         return NULL;
4693 }
4694 u16 Server::allocateUnknownNodeId(const std::string &name)
4695 {
4696         return m_nodedef->allocateDummy(name);
4697 }
4698 ISoundManager* Server::getSoundManager()
4699 {
4700         return &dummySoundManager;
4701 }
4702 MtEventManager* Server::getEventManager()
4703 {
4704         return m_event;
4705 }
4706 IRollbackReportSink* Server::getRollbackReportSink()
4707 {
4708         if(!m_enable_rollback_recording)
4709                 return NULL;
4710         if(!m_rollback_sink_enabled)
4711                 return NULL;
4712         return m_rollback;
4713 }
4714
4715 IWritableItemDefManager* Server::getWritableItemDefManager()
4716 {
4717         return m_itemdef;
4718 }
4719 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4720 {
4721         return m_nodedef;
4722 }
4723 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4724 {
4725         return m_craftdef;
4726 }
4727
4728 const ModSpec* Server::getModSpec(const std::string &modname)
4729 {
4730         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4731                         i != m_mods.end(); i++){
4732                 const ModSpec &mod = *i;
4733                 if(mod.name == modname)
4734                         return &mod;
4735         }
4736         return NULL;
4737 }
4738 void Server::getModNames(core::list<std::string> &modlist)
4739 {
4740         for(core::list<ModSpec>::Iterator i = m_mods.begin(); i != m_mods.end(); i++)
4741         {
4742                 modlist.push_back((*i).name);
4743         }
4744 }
4745 std::string Server::getBuiltinLuaPath()
4746 {
4747         return porting::path_share + DIR_DELIM + "builtin";
4748 }
4749
4750 v3f findSpawnPos(ServerMap &map)
4751 {
4752         //return v3f(50,50,50)*BS;
4753
4754         v3s16 nodepos;
4755
4756 #if 0
4757         nodepos = v2s16(0,0);
4758         groundheight = 20;
4759 #endif
4760
4761 #if 1
4762         // Try to find a good place a few times
4763         for(s32 i=0; i<1000; i++)
4764         {
4765                 s32 range = 1 + i;
4766                 // We're going to try to throw the player to this position
4767                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4768                                 -range + (myrand()%(range*2)));
4769                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4770                 // Get ground height at point (fallbacks to heightmap function)
4771                 s16 groundheight = map.findGroundLevel(nodepos2d);
4772                 // Don't go underwater
4773                 if(groundheight < WATER_LEVEL)
4774                 {
4775                         //infostream<<"-> Underwater"<<std::endl;
4776                         continue;
4777                 }
4778                 // Don't go to high places
4779                 if(groundheight > WATER_LEVEL + 4)
4780                 {
4781                         //infostream<<"-> Underwater"<<std::endl;
4782                         continue;
4783                 }
4784
4785                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4786                 bool is_good = false;
4787                 s32 air_count = 0;
4788                 for(s32 i=0; i<10; i++){
4789                         v3s16 blockpos = getNodeBlockPos(nodepos);
4790                         map.emergeBlock(blockpos, true);
4791                         MapNode n = map.getNodeNoEx(nodepos);
4792                         if(n.getContent() == CONTENT_AIR){
4793                                 air_count++;
4794                                 if(air_count >= 2){
4795                                         is_good = true;
4796                                         nodepos.Y -= 1;
4797                                         break;
4798                                 }
4799                         }
4800                         nodepos.Y++;
4801                 }
4802                 if(is_good){
4803                         // Found a good place
4804                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4805                         break;
4806                 }
4807         }
4808 #endif
4809
4810         return intToFloat(nodepos, BS);
4811 }
4812
4813 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4814 {
4815         RemotePlayer *player = NULL;
4816         bool newplayer = false;
4817
4818         /*
4819                 Try to get an existing player
4820         */
4821         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4822
4823         // If player is already connected, cancel
4824         if(player != NULL && player->peer_id != 0)
4825         {
4826                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4827                 return NULL;
4828         }
4829
4830         /*
4831                 If player with the wanted peer_id already exists, cancel.
4832         */
4833         if(m_env->getPlayer(peer_id) != NULL)
4834         {
4835                 infostream<<"emergePlayer(): Player with wrong name but same"
4836                                 " peer_id already exists"<<std::endl;
4837                 return NULL;
4838         }
4839
4840         /*
4841                 Create a new player if it doesn't exist yet
4842         */
4843         if(player == NULL)
4844         {
4845                 newplayer = true;
4846                 player = new RemotePlayer(this);
4847                 player->updateName(name);
4848
4849                 /* Set player position */
4850                 infostream<<"Server: Finding spawn place for player \""
4851                                 <<name<<"\""<<std::endl;
4852                 v3f pos = findSpawnPos(m_env->getServerMap());
4853                 player->setPosition(pos);
4854
4855                 /* Add player to environment */
4856                 m_env->addPlayer(player);
4857         }
4858
4859         /*
4860                 Create a new player active object
4861         */
4862         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4863                         getPlayerEffectivePrivs(player->getName()),
4864                         isSingleplayer());
4865
4866         /* Add object to environment */
4867         m_env->addActiveObject(playersao);
4868
4869         /* Run scripts */
4870         if(newplayer)
4871                 scriptapi_on_newplayer(m_lua, playersao);
4872
4873         scriptapi_on_joinplayer(m_lua, playersao);
4874
4875         return playersao;
4876 }
4877
4878 void Server::handlePeerChange(PeerChange &c)
4879 {
4880         JMutexAutoLock envlock(m_env_mutex);
4881         JMutexAutoLock conlock(m_con_mutex);
4882
4883         if(c.type == PEER_ADDED)
4884         {
4885                 /*
4886                         Add
4887                 */
4888
4889                 // Error check
4890                 core::map<u16, RemoteClient*>::Node *n;
4891                 n = m_clients.find(c.peer_id);
4892                 // The client shouldn't already exist
4893                 assert(n == NULL);
4894
4895                 // Create client
4896                 RemoteClient *client = new RemoteClient();
4897                 client->peer_id = c.peer_id;
4898                 m_clients.insert(client->peer_id, client);
4899
4900         } // PEER_ADDED
4901         else if(c.type == PEER_REMOVED)
4902         {
4903                 /*
4904                         Delete
4905                 */
4906
4907                 // Error check
4908                 core::map<u16, RemoteClient*>::Node *n;
4909                 n = m_clients.find(c.peer_id);
4910                 // The client should exist
4911                 assert(n != NULL);
4912
4913                 /*
4914                         Mark objects to be not known by the client
4915                 */
4916                 RemoteClient *client = n->getValue();
4917                 // Handle objects
4918                 for(core::map<u16, bool>::Iterator
4919                                 i = client->m_known_objects.getIterator();
4920                                 i.atEnd()==false; i++)
4921                 {
4922                         // Get object
4923                         u16 id = i.getNode()->getKey();
4924                         ServerActiveObject* obj = m_env->getActiveObject(id);
4925
4926                         if(obj && obj->m_known_by_count > 0)
4927                                 obj->m_known_by_count--;
4928                 }
4929
4930                 /*
4931                         Clear references to playing sounds
4932                 */
4933                 for(std::map<s32, ServerPlayingSound>::iterator
4934                                 i = m_playing_sounds.begin();
4935                                 i != m_playing_sounds.end();)
4936                 {
4937                         ServerPlayingSound &psound = i->second;
4938                         psound.clients.erase(c.peer_id);
4939                         if(psound.clients.size() == 0)
4940                                 m_playing_sounds.erase(i++);
4941                         else
4942                                 i++;
4943                 }
4944
4945                 Player *player = m_env->getPlayer(c.peer_id);
4946
4947                 // Collect information about leaving in chat
4948                 std::wstring message;
4949                 {
4950                         if(player != NULL)
4951                         {
4952                                 std::wstring name = narrow_to_wide(player->getName());
4953                                 message += L"*** ";
4954                                 message += name;
4955                                 message += L" left the game.";
4956                                 if(c.timeout)
4957                                         message += L" (timed out)";
4958                         }
4959                 }
4960
4961                 /* Run scripts and remove from environment */
4962                 {
4963                         if(player != NULL)
4964                         {
4965                                 PlayerSAO *playersao = player->getPlayerSAO();
4966                                 assert(playersao);
4967
4968                                 scriptapi_on_leaveplayer(m_lua, playersao);
4969
4970                                 playersao->disconnected();
4971                         }
4972                 }
4973
4974                 /*
4975                         Print out action
4976                 */
4977                 {
4978                         if(player != NULL)
4979                         {
4980                                 std::ostringstream os(std::ios_base::binary);
4981                                 for(core::map<u16, RemoteClient*>::Iterator
4982                                         i = m_clients.getIterator();
4983                                         i.atEnd() == false; i++)
4984                                 {
4985                                         RemoteClient *client = i.getNode()->getValue();
4986                                         assert(client->peer_id == i.getNode()->getKey());
4987                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4988                                                 continue;
4989                                         // Get player
4990                                         Player *player = m_env->getPlayer(client->peer_id);
4991                                         if(!player)
4992                                                 continue;
4993                                         // Get name of player
4994                                         os<<player->getName()<<" ";
4995                                 }
4996
4997                                 actionstream<<player->getName()<<" "
4998                                                 <<(c.timeout?"times out.":"leaves game.")
4999                                                 <<" List of players: "
5000                                                 <<os.str()<<std::endl;
5001                         }
5002                 }
5003
5004                 // Delete client
5005                 delete m_clients[c.peer_id];
5006                 m_clients.remove(c.peer_id);
5007
5008                 // Send player info to all remaining clients
5009                 //SendPlayerInfos();
5010
5011                 // Send leave chat message to all remaining clients
5012                 if(message.length() != 0)
5013                         BroadcastChatMessage(message);
5014
5015         } // PEER_REMOVED
5016         else
5017         {
5018                 assert(0);
5019         }
5020 }
5021
5022 void Server::handlePeerChanges()
5023 {
5024         while(m_peer_change_queue.size() > 0)
5025         {
5026                 PeerChange c = m_peer_change_queue.pop_front();
5027
5028                 verbosestream<<"Server: Handling peer change: "
5029                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
5030                                 <<std::endl;
5031
5032                 handlePeerChange(c);
5033         }
5034 }
5035
5036 void dedicated_server_loop(Server &server, bool &kill)
5037 {
5038         DSTACK(__FUNCTION_NAME);
5039
5040         verbosestream<<"dedicated_server_loop()"<<std::endl;
5041
5042         IntervalLimiter m_profiler_interval;
5043
5044         for(;;)
5045         {
5046                 float steplen = g_settings->getFloat("dedicated_server_step");
5047                 // This is kind of a hack but can be done like this
5048                 // because server.step() is very light
5049                 {
5050                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
5051                         sleep_ms((int)(steplen*1000.0));
5052                 }
5053                 server.step(steplen);
5054
5055                 if(server.getShutdownRequested() || kill)
5056                 {
5057                         infostream<<"Dedicated server quitting"<<std::endl;
5058                         break;
5059                 }
5060
5061                 /*
5062                         Profiler
5063                 */
5064                 float profiler_print_interval =
5065                                 g_settings->getFloat("profiler_print_interval");
5066                 if(profiler_print_interval != 0)
5067                 {
5068                         if(m_profiler_interval.step(steplen, profiler_print_interval))
5069                         {
5070                                 infostream<<"Profiler:"<<std::endl;
5071                                 g_profiler->print(infostream);
5072                                 g_profiler->clear();
5073                         }
5074                 }
5075         }
5076 }
5077
5078