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 "biome.h"
  43 #include "content_mapnode.h"
  44 #include "content_nodemeta.h"
  45 #include "content_abm.h"
  46 #include "content_sao.h"
  47 #include "mods.h"
  48 #include "sha1.h"
  49 #include "base64.h"
  50 #include "tool.h"
  51 #include "sound.h" // dummySoundManager
  52 #include "event_manager.h"
  53 #include "hex.h"
  54 #include "util/string.h"
  55 #include "util/pointedthing.h"
  56 #include "util/mathconstants.h"
  57 #include "rollback.h"
  58 #include "util/serialize.h"
  59
  60 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  61
  62 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
  63
  64 class MapEditEventIgnorer
  65 {
  66 public:
  67         MapEditEventIgnorer(bool *flag):
  68                 m_flag(flag)
  69         {
  70                 if(*m_flag == false)
  71                         *m_flag = true;
  72                 else
  73                         m_flag = NULL;
  74         }
  75
  76         ~MapEditEventIgnorer()
  77         {
  78                 if(m_flag)
  79                 {
  80                         assert(*m_flag);
  81                         *m_flag = false;
  82                 }
  83         }
  84
  85 private:
  86         bool *m_flag;
  87 };
  88
  89 class MapEditEventAreaIgnorer
  90 {
  91 public:
  92         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
  93                 m_ignorevariable(ignorevariable)
  94         {
  95                 if(m_ignorevariable->getVolume() == 0)
  96                         *m_ignorevariable = a;
  97                 else
  98                         m_ignorevariable = NULL;
  99         }
 100
 101         ~MapEditEventAreaIgnorer()
 102         {
 103                 if(m_ignorevariable)
 104                 {
 105                         assert(m_ignorevariable->getVolume() != 0);
 106                         *m_ignorevariable = VoxelArea();
 107                 }
 108         }
 109
 110 private:
 111         VoxelArea *m_ignorevariable;
 112 };
 113
 114 void * ServerThread::Thread()
 115 {
 116         ThreadStarted();
 117
 118         log_register_thread("ServerThread");
 119
 120         DSTACK(__FUNCTION_NAME);
 121
 122         BEGIN_DEBUG_EXCEPTION_HANDLER
 123
 124         while(getRun())
 125         {
 126                 try{
 127                         //TimeTaker timer("AsyncRunStep() + Receive()");
 128
 129                         {
 130                                 //TimeTaker timer("AsyncRunStep()");
 131                                 m_server->AsyncRunStep();
 132                         }
 133
 134                         //infostream<<"Running m_server->Receive()"<<std::endl;
 135                         m_server->Receive();
 136                 }
 137                 catch(con::NoIncomingDataException &e)
 138                 {
 139                 }
 140                 catch(con::PeerNotFoundException &e)
 141                 {
 142                         infostream<<"Server: PeerNotFoundException"<<std::endl;
 143                 }
 144                 catch(con::ConnectionBindFailed &e)
 145                 {
 146                         m_server->setAsyncFatalError(e.what());
 147                 }
 148                 catch(LuaError &e)
 149                 {
 150                         m_server->setAsyncFatalError(e.what());
 151                 }
 152         }
 153
 154         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 155
 156         return NULL;
 157 }
 158
 159 void * EmergeThread::Thread()
 160 {
 161         ThreadStarted();
 162
 163         log_register_thread("EmergeThread");
 164
 165         DSTACK(__FUNCTION_NAME);
 166
 167         BEGIN_DEBUG_EXCEPTION_HANDLER
 168
 169         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 170
 171         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 172
 173         ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
 174         EmergeManager *emerge = m_server->m_emerge;
 175         Mapgen *mapgen = emerge->getMapgen();
 176
 177         /*
 178                 Get block info from queue, emerge them and send them
 179                 to clients.
 180
 181                 After queue is empty, exit.
 182         */
 183         while(getRun())
 184         try{
 185                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
 186                 if(qptr == NULL)
 187                         break;
 188
 189                 SharedPtr<QueuedBlockEmerge> q(qptr);
 190
 191                 v3s16 &p = q->pos;
 192                 v2s16 p2d(p.X,p.Z);
 193
 194                 last_tried_pos = p;
 195
 196                 /*
 197                         Do not generate over-limit
 198                 */
 199                 if(blockpos_over_limit(p))
 200                         continue;
 201
 202                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
 203
 204                 //TimeTaker timer("block emerge");
 205
 206                 /*
 207                         Try to emerge it from somewhere.
 208
 209                         If it is only wanted as optional, only loading from disk
 210                         will be allowed.
 211                 */
 212
 213                 /*
 214                         Check if any peer wants it as non-optional. In that case it
 215                         will be generated.
 216
 217                         Also decrement the emerge queue count in clients.
 218                 */
 219
 220                 bool only_from_disk = true;
 221
 222                 {
 223                         core::map<u16, u8>::Iterator i;
 224                         for(i=q->peer_ids.getIterator(); i.atEnd()==false; i++)
 225                         {
 226                                 //u16 peer_id = i.getNode()->getKey();
 227
 228                                 // Check flags
 229                                 u8 flags = i.getNode()->getValue();
 230                                 if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
 231                                         only_from_disk = false;
 232
 233                         }
 234                 }
 235
 236                 if(enable_mapgen_debug_info)
 237                         infostream<<"EmergeThread: p="
 238                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
 239                                         <<"only_from_disk="<<only_from_disk<<std::endl;
 240
 241
 242
 243                 MapBlock *block = NULL;
 244                 bool got_block = true;
 245                 core::map<v3s16, MapBlock*> modified_blocks;
 246
 247                 /*
 248                         Try to fetch block from memory or disk.
 249                         If not found and asked to generate, initialize generator.
 250                 */
 251
 252                 bool started_generate = false;
 253                 BlockMakeData data;
 254
 255                 {
 256                         JMutexAutoLock envlock(m_server->m_env_mutex);
 257
 258                         // Load sector if it isn't loaded
 259                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
 260                                 map.loadSectorMeta(p2d);
 261
 262                         // Attempt to load block
 263                         block = map.getBlockNoCreateNoEx(p);
 264                         if(!block || block->isDummy() || !block->isGenerated())
 265                         {
 266                                 if(enable_mapgen_debug_info)
 267                                         infostream<<"EmergeThread: not in memory, "
 268                                                         <<"attempting to load from disk"<<std::endl;
 269
 270                                 block = map.loadBlock(p);
 271                         }
 272
 273                         // If could not load and allowed to generate, start generation
 274                         // inside this same envlock
 275                         if(only_from_disk == false &&
 276                                         (block == NULL || block->isGenerated() == false)){
 277                                 if(enable_mapgen_debug_info)
 278                                         infostream<<"EmergeThread: generating"<<std::endl;
 279                                 started_generate = true;
 280
 281                                 map.initBlockMake(&data, p);
 282                         }
 283                 }
 284
 285                 /*
 286                         If generator was initialized, generate now when envlock is free.
 287                 */
 288                 if(started_generate)
 289                 {
 290                         {
 291                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
 292                                                 SPT_AVG);
 293                                 TimeTaker t("mapgen::make_block()");
 294
 295                                 mapgen->makeChunk(&data);
 296                                 //mapgen::make_block(&data);
 297
 298                                 if(enable_mapgen_debug_info == false)
 299                                         t.stop(true); // Hide output
 300                         }
 301
 302                         do{ // enable break
 303                                 // Lock environment again to access the map
 304                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 305
 306                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 307                                                 "mapgen::make_block (envlock)", SPT_AVG);
 308
 309                                 // Blit data back on map, update lighting, add mobs and
 310                                 // whatever this does
 311                                 map.finishBlockMake(&data, modified_blocks);
 312
 313                                 // Get central block
 314                                 block = map.getBlockNoCreateNoEx(p);
 315
 316                                 // If block doesn't exist, don't try doing anything with it
 317                                 // This happens if the block is not in generation boundaries
 318                                 if(!block)
 319                                         break;
 320
 321                                 /*
 322                                         Do some post-generate stuff
 323                                 */
 324
 325                                 v3s16 minp = data.blockpos_min*MAP_BLOCKSIZE;
 326                                 v3s16 maxp = data.blockpos_max*MAP_BLOCKSIZE +
 327                                                 v3s16(1,1,1)*(MAP_BLOCKSIZE-1);
 328
 329                                 /*
 330                                         Ignore map edit events, they will not need to be
 331                                         sent to anybody because the block hasn't been sent
 332                                         to anybody
 333                                 */
 334                                 //MapEditEventIgnorer ign(&m_server->m_ignore_map_edit_events);
 335                                 MapEditEventAreaIgnorer ign(
 336                                                 &m_server->m_ignore_map_edit_events_area,
 337                                                 VoxelArea(minp, maxp));
 338                                 {
 339                                         TimeTaker timer("on_generated");
 340                                         scriptapi_environment_on_generated(m_server->m_lua,
 341                                                         minp, maxp, emerge->getBlockSeed(minp));
 342                                         /*int t = timer.stop(true);
 343                                         dstream<<"on_generated took "<<t<<"ms"<<std::endl;*/
 344                                 }
 345
 346                                 if(enable_mapgen_debug_info)
 347                                         infostream<<"EmergeThread: ended up with: "
 348                                                         <<analyze_block(block)<<std::endl;
 349
 350                                 // Activate objects and stuff
 351                                 m_server->m_env->activateBlock(block, 0);
 352                         }while(false);
 353                 }
 354
 355                 if(block == NULL)
 356                         got_block = false;
 357
 358                 /*
 359                         Set sent status of modified blocks on clients
 360                 */
 361
 362                 // NOTE: Server's clients are also behind the connection mutex
 363                 JMutexAutoLock lock(m_server->m_con_mutex);
 364
 365                 /*
 366                         Add the originally fetched block to the modified list
 367                 */
 368                 if(got_block)
 369                 {
 370                         modified_blocks.insert(p, block);
 371                 }
 372
 373                 /*
 374                         Set the modified blocks unsent for all the clients
 375                 */
 376
 377                 for(core::map<u16, RemoteClient*>::Iterator
 378                                 i = m_server->m_clients.getIterator();
 379                                 i.atEnd() == false; i++)
 380                 {
 381                         RemoteClient *client = i.getNode()->getValue();
 382
 383                         if(modified_blocks.size() > 0)
 384                         {
 385                                 // Remove block from sent history
 386                                 client->SetBlocksNotSent(modified_blocks);
 387                         }
 388                 }
 389         }
 390         catch(VersionMismatchException &e)
 391         {
 392                 std::ostringstream err;
 393                 err<<"World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 394                 err<<"----"<<std::endl;
 395                 err<<"\""<<e.what()<<"\""<<std::endl;
 396                 err<<"See debug.txt."<<std::endl;
 397                 err<<"World probably saved by a newer version of Minetest."<<std::endl;
 398                 m_server->setAsyncFatalError(err.str());
 399         }
 400         catch(SerializationError &e)
 401         {
 402                 std::ostringstream err;
 403                 err<<"Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 404                 err<<"----"<<std::endl;
 405                 err<<"\""<<e.what()<<"\""<<std::endl;
 406                 err<<"See debug.txt."<<std::endl;
 407                 err<<"You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 408                 m_server->setAsyncFatalError(err.str());
 409         }
 410
 411         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 412
 413         log_deregister_thread();
 414
 415         return NULL;
 416 }
 417
 418 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
 419 {
 420         if(pos_exists) *pos_exists = false;
 421         switch(type){
 422         case SSP_LOCAL:
 423                 return v3f(0,0,0);
 424         case SSP_POSITIONAL:
 425                 if(pos_exists) *pos_exists = true;
 426                 return pos;
 427         case SSP_OBJECT: {
 428                 if(object == 0)
 429                         return v3f(0,0,0);
 430                 ServerActiveObject *sao = env->getActiveObject(object);
 431                 if(!sao)
 432                         return v3f(0,0,0);
 433                 if(pos_exists) *pos_exists = true;
 434                 return sao->getBasePosition(); }
 435         }
 436         return v3f(0,0,0);
 437 }
 438
 439 void RemoteClient::GetNextBlocks(Server *server, float dtime,
 440                 core::array<PrioritySortedBlockTransfer> &dest)
 441 {
 442         DSTACK(__FUNCTION_NAME);
 443
 444         /*u32 timer_result;
 445         TimeTaker timer("RemoteClient::GetNextBlocks", &timer_result);*/
 446
 447         // Increment timers
 448         m_nothing_to_send_pause_timer -= dtime;
 449         m_nearest_unsent_reset_timer += dtime;
 450
 451         if(m_nothing_to_send_pause_timer >= 0)
 452                 return;
 453
 454         Player *player = server->m_env->getPlayer(peer_id);
 455         // This can happen sometimes; clients and players are not in perfect sync.
 456         if(player == NULL)
 457                 return;
 458
 459         // Won't send anything if already sending
 460         if(m_blocks_sending.size() >= g_settings->getU16
 461                         ("max_simultaneous_block_sends_per_client"))
 462         {
 463                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 464                 return;
 465         }
 466
 467         //TimeTaker timer("RemoteClient::GetNextBlocks");
 468
 469         v3f playerpos = player->getPosition();
 470         v3f playerspeed = player->getSpeed();
 471         v3f playerspeeddir(0,0,0);
 472         if(playerspeed.getLength() > 1.0*BS)
 473                 playerspeeddir = playerspeed / playerspeed.getLength();
 474         // Predict to next block
 475         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 476
 477         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 478
 479         v3s16 center = getNodeBlockPos(center_nodepos);
 480
 481         // Camera position and direction
 482         v3f camera_pos = player->getEyePosition();
 483         v3f camera_dir = v3f(0,0,1);
 484         camera_dir.rotateYZBy(player->getPitch());
 485         camera_dir.rotateXZBy(player->getYaw());
 486
 487         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 488                         <<camera_dir.Z<<")"<<std::endl;*/
 489
 490         /*
 491                 Get the starting value of the block finder radius.
 492         */
 493
 494         if(m_last_center != center)
 495         {
 496                 m_nearest_unsent_d = 0;
 497                 m_last_center = center;
 498         }
 499
 500         /*infostream<<"m_nearest_unsent_reset_timer="
 501                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 502
 503         // Reset periodically to workaround for some bugs or stuff
 504         if(m_nearest_unsent_reset_timer > 20.0)
 505         {
 506                 m_nearest_unsent_reset_timer = 0;
 507                 m_nearest_unsent_d = 0;
 508                 //infostream<<"Resetting m_nearest_unsent_d for "
 509                 //              <<server->getPlayerName(peer_id)<<std::endl;
 510         }
 511
 512         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 513         s16 d_start = m_nearest_unsent_d;
 514
 515         //infostream<<"d_start="<<d_start<<std::endl;
 516
 517         u16 max_simul_sends_setting = g_settings->getU16
 518                         ("max_simultaneous_block_sends_per_client");
 519         u16 max_simul_sends_usually = max_simul_sends_setting;
 520
 521         /*
 522                 Check the time from last addNode/removeNode.
 523
 524                 Decrease send rate if player is building stuff.
 525         */
 526         m_time_from_building += dtime;
 527         if(m_time_from_building < g_settings->getFloat(
 528                                 "full_block_send_enable_min_time_from_building"))
 529         {
 530                 max_simul_sends_usually
 531                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 532         }
 533
 534         /*
 535                 Number of blocks sending + number of blocks selected for sending
 536         */
 537         u32 num_blocks_selected = m_blocks_sending.size();
 538
 539         /*
 540                 next time d will be continued from the d from which the nearest
 541                 unsent block was found this time.
 542
 543                 This is because not necessarily any of the blocks found this
 544                 time are actually sent.
 545         */
 546         s32 new_nearest_unsent_d = -1;
 547
 548         s16 d_max = g_settings->getS16("max_block_send_distance");
 549         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 550
 551         // Don't loop very much at a time
 552         s16 max_d_increment_at_time = 2;
 553         if(d_max > d_start + max_d_increment_at_time)
 554                 d_max = d_start + max_d_increment_at_time;
 555         /*if(d_max_gen > d_start+2)
 556                 d_max_gen = d_start+2;*/
 557
 558         //infostream<<"Starting from "<<d_start<<std::endl;
 559
 560         s32 nearest_emerged_d = -1;
 561         s32 nearest_emergefull_d = -1;
 562         s32 nearest_sent_d = -1;
 563         bool queue_is_full = false;
 564
 565         s16 d;
 566         for(d = d_start; d <= d_max; d++)
 567         {
 568                 /*errorstream<<"checking d="<<d<<" for "
 569                                 <<server->getPlayerName(peer_id)<<std::endl;*/
 570                 //infostream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
 571
 572                 /*
 573                         If m_nearest_unsent_d was changed by the EmergeThread
 574                         (it can change it to 0 through SetBlockNotSent),
 575                         update our d to it.
 576                         Else update m_nearest_unsent_d
 577                 */
 578                 /*if(m_nearest_unsent_d != last_nearest_unsent_d)
 579                 {
 580                         d = m_nearest_unsent_d;
 581                         last_nearest_unsent_d = m_nearest_unsent_d;
 582                 }*/
 583
 584                 /*
 585                         Get the border/face dot coordinates of a "d-radiused"
 586                         box
 587                 */
 588                 core::list<v3s16> list;
 589                 getFacePositions(list, d);
 590
 591                 core::list<v3s16>::Iterator li;
 592                 for(li=list.begin(); li!=list.end(); li++)
 593                 {
 594                         v3s16 p = *li + center;
 595
 596                         /*
 597                                 Send throttling
 598                                 - Don't allow too many simultaneous transfers
 599                                 - EXCEPT when the blocks are very close
 600
 601                                 Also, don't send blocks that are already flying.
 602                         */
 603
 604                         // Start with the usual maximum
 605                         u16 max_simul_dynamic = max_simul_sends_usually;
 606
 607                         // If block is very close, allow full maximum
 608                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 609                                 max_simul_dynamic = max_simul_sends_setting;
 610
 611                         // Don't select too many blocks for sending
 612                         if(num_blocks_selected >= max_simul_dynamic)
 613                         {
 614                                 queue_is_full = true;
 615                                 goto queue_full_break;
 616                         }
 617
 618                         // Don't send blocks that are currently being transferred
 619                         if(m_blocks_sending.find(p) != NULL)
 620                                 continue;
 621
 622                         /*
 623                                 Do not go over-limit
 624                         */
 625                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 626                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 627                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 628                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 629                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 630                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
 631                                 continue;
 632
 633                         // If this is true, inexistent block will be made from scratch
 634                         bool generate = d <= d_max_gen;
 635
 636                         {
 637                                 /*// Limit the generating area vertically to 2/3
 638                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 639                                         generate = false;*/
 640
 641                                 // Limit the send area vertically to 1/2
 642                                 if(abs(p.Y - center.Y) > d_max / 2)
 643                                         continue;
 644                         }
 645
 646 #if 0
 647                         /*
 648                                 If block is far away, don't generate it unless it is
 649                                 near ground level.
 650                         */
 651                         if(d >= 4)
 652                         {
 653         #if 1
 654                                 // Block center y in nodes
 655                                 f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
 656                                 // Don't generate if it's very high or very low
 657                                 if(y < -64 || y > 64)
 658                                         generate = false;
 659         #endif
 660         #if 0
 661                                 v2s16 p2d_nodes_center(
 662                                         MAP_BLOCKSIZE*p.X,
 663                                         MAP_BLOCKSIZE*p.Z);
 664
 665                                 // Get ground height in nodes
 666                                 s16 gh = server->m_env->getServerMap().findGroundLevel(
 667                                                 p2d_nodes_center);
 668
 669                                 // If differs a lot, don't generate
 670                                 if(fabs(gh - y) > MAP_BLOCKSIZE*2)
 671                                         generate = false;
 672                                         // Actually, don't even send it
 673                                         //continue;
 674         #endif
 675                         }
 676 #endif
 677
 678                         //infostream<<"d="<<d<<std::endl;
 679 #if 1
 680                         /*
 681                                 Don't generate or send if not in sight
 682                                 FIXME This only works if the client uses a small enough
 683                                 FOV setting. The default of 72 degrees is fine.
 684                         */
 685
 686                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 687                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 688                         {
 689                                 continue;
 690                         }
 691 #endif
 692                         /*
 693                                 Don't send already sent blocks
 694                         */
 695                         {
 696                                 if(m_blocks_sent.find(p) != NULL)
 697                                 {
 698                                         continue;
 699                                 }
 700                         }
 701
 702                         /*
 703                                 Check if map has this block
 704                         */
 705                         MapBlock *block = server->m_env->getMap().getBlockNoCreateNoEx(p);
 706
 707                         bool surely_not_found_on_disk = false;
 708                         bool block_is_invalid = false;
 709                         if(block != NULL)
 710                         {
 711                                 // Reset usage timer, this block will be of use in the future.
 712                                 block->resetUsageTimer();
 713
 714                                 // Block is dummy if data doesn't exist.
 715                                 // It means it has been not found from disk and not generated
 716                                 if(block->isDummy())
 717                                 {
 718                                         surely_not_found_on_disk = true;
 719                                 }
 720
 721                                 // Block is valid if lighting is up-to-date and data exists
 722                                 if(block->isValid() == false)
 723                                 {
 724                                         block_is_invalid = true;
 725                                 }
 726
 727                                 /*if(block->isFullyGenerated() == false)
 728                                 {
 729                                         block_is_invalid = true;
 730                                 }*/
 731
 732 #if 0
 733                                 v2s16 p2d(p.X, p.Z);
 734                                 ServerMap *map = (ServerMap*)(&server->m_env->getMap());
 735                                 v2s16 chunkpos = map->sector_to_chunk(p2d);
 736                                 if(map->chunkNonVolatile(chunkpos) == false)
 737                                         block_is_invalid = true;
 738 #endif
 739                                 if(block->isGenerated() == false)
 740                                         block_is_invalid = true;
 741 #if 1
 742                                 /*
 743                                         If block is not close, don't send it unless it is near
 744                                         ground level.
 745
 746                                         Block is near ground level if night-time mesh
 747                                         differs from day-time mesh.
 748                                 */
 749                                 if(d >= 4)
 750                                 {
 751                                         if(block->getDayNightDiff() == false)
 752                                                 continue;
 753                                 }
 754 #endif
 755                         }
 756
 757                         /*
 758                                 If block has been marked to not exist on disk (dummy)
 759                                 and generating new ones is not wanted, skip block.
 760                         */
 761                         if(generate == false && surely_not_found_on_disk == true)
 762                         {
 763                                 // get next one.
 764                                 continue;
 765                         }
 766
 767                         /*
 768                                 Add inexistent block to emerge queue.
 769                         */
 770                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 771                         {
 772                                 //TODO: Get value from somewhere
 773                                 // Allow only one block in emerge queue
 774                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
 775                                 // Allow two blocks in queue per client
 776                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
 777                                 u32 max_emerge = 5;
 778                                 // Make it more responsive when needing to generate stuff
 779                                 if(surely_not_found_on_disk)
 780                                         max_emerge = 1;
 781                                 if(server->m_emerge_queue.peerItemCount(peer_id) < max_emerge)
 782                                 {
 783                                         //infostream<<"Adding block to emerge queue"<<std::endl;
 784
 785                                         // Add it to the emerge queue and trigger the thread
 786
 787                                         u8 flags = 0;
 788                                         if(generate == false)
 789                                                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
 790
 791                                         server->m_emerge_queue.addBlock(peer_id, p, flags);
 792                                         server->m_emergethread.trigger();
 793
 794                                         if(nearest_emerged_d == -1)
 795                                                 nearest_emerged_d = d;
 796                                 } else {
 797                                         if(nearest_emergefull_d == -1)
 798                                                 nearest_emergefull_d = d;
 799                                         goto queue_full_break;
 800                                 }
 801
 802                                 // get next one.
 803                                 continue;
 804                         }
 805
 806                         if(nearest_sent_d == -1)
 807                                 nearest_sent_d = d;
 808
 809                         /*
 810                                 Add block to send queue
 811                         */
 812
 813                         /*errorstream<<"sending from d="<<d<<" to "
 814                                         <<server->getPlayerName(peer_id)<<std::endl;*/
 815
 816                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 817
 818                         dest.push_back(q);
 819
 820                         num_blocks_selected += 1;
 821                 }
 822         }
 823 queue_full_break:
 824
 825         //infostream<<"Stopped at "<<d<<std::endl;
 826
 827         // If nothing was found for sending and nothing was queued for
 828         // emerging, continue next time browsing from here
 829         if(nearest_emerged_d != -1){
 830                 new_nearest_unsent_d = nearest_emerged_d;
 831         } else if(nearest_emergefull_d != -1){
 832                 new_nearest_unsent_d = nearest_emergefull_d;
 833         } else {
 834                 if(d > g_settings->getS16("max_block_send_distance")){
 835                         new_nearest_unsent_d = 0;
 836                         m_nothing_to_send_pause_timer = 2.0;
 837                         /*infostream<<"GetNextBlocks(): d wrapped around for "
 838                                         <<server->getPlayerName(peer_id)
 839                                         <<"; setting to 0 and pausing"<<std::endl;*/
 840                 } else {
 841                         if(nearest_sent_d != -1)
 842                                 new_nearest_unsent_d = nearest_sent_d;
 843                         else
 844                                 new_nearest_unsent_d = d;
 845                 }
 846         }
 847
 848         if(new_nearest_unsent_d != -1)
 849                 m_nearest_unsent_d = new_nearest_unsent_d;
 850
 851         /*timer_result = timer.stop(true);
 852         if(timer_result != 0)
 853                 infostream<<"GetNextBlocks timeout: "<<timer_result<<" (!=0)"<<std::endl;*/
 854 }
 855
 856 void RemoteClient::GotBlock(v3s16 p)
 857 {
 858         if(m_blocks_sending.find(p) != NULL)
 859                 m_blocks_sending.remove(p);
 860         else
 861         {
 862                 /*infostream<<"RemoteClient::GotBlock(): Didn't find in"
 863                                 " m_blocks_sending"<<std::endl;*/
 864                 m_excess_gotblocks++;
 865         }
 866         m_blocks_sent.insert(p, true);
 867 }
 868
 869 void RemoteClient::SentBlock(v3s16 p)
 870 {
 871         if(m_blocks_sending.find(p) == NULL)
 872                 m_blocks_sending.insert(p, 0.0);
 873         else
 874                 infostream<<"RemoteClient::SentBlock(): Sent block"
 875                                 " already in m_blocks_sending"<<std::endl;
 876 }
 877
 878 void RemoteClient::SetBlockNotSent(v3s16 p)
 879 {
 880         m_nearest_unsent_d = 0;
 881
 882         if(m_blocks_sending.find(p) != NULL)
 883                 m_blocks_sending.remove(p);
 884         if(m_blocks_sent.find(p) != NULL)
 885                 m_blocks_sent.remove(p);
 886 }
 887
 888 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
 889 {
 890         m_nearest_unsent_d = 0;
 891
 892         for(core::map<v3s16, MapBlock*>::Iterator
 893                         i = blocks.getIterator();
 894                         i.atEnd()==false; i++)
 895         {
 896                 v3s16 p = i.getNode()->getKey();
 897
 898                 if(m_blocks_sending.find(p) != NULL)
 899                         m_blocks_sending.remove(p);
 900                 if(m_blocks_sent.find(p) != NULL)
 901                         m_blocks_sent.remove(p);
 902         }
 903 }
 904
 905 /*
 906         PlayerInfo
 907 */
 908
 909 PlayerInfo::PlayerInfo()
 910 {
 911         name[0] = 0;
 912         avg_rtt = 0;
 913 }
 914
 915 void PlayerInfo::PrintLine(std::ostream *s)
 916 {
 917         (*s)<<id<<": ";
 918         (*s)<<"\""<<name<<"\" ("
 919                         <<(position.X/10)<<","<<(position.Y/10)
 920                         <<","<<(position.Z/10)<<") ";
 921         address.print(s);
 922         (*s)<<" avg_rtt="<<avg_rtt;
 923         (*s)<<std::endl;
 924 }
 925
 926 /*
 927         Server
 928 */
 929
 930 Server::Server(
 931                 const std::string &path_world,
 932                 const std::string &path_config,
 933                 const SubgameSpec &gamespec,
 934                 bool simple_singleplayer_mode
 935         ):
 936         m_path_world(path_world),
 937         m_path_config(path_config),
 938         m_gamespec(gamespec),
 939         m_simple_singleplayer_mode(simple_singleplayer_mode),
 940         m_async_fatal_error(""),
 941         m_env(NULL),
 942         m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
 943         m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
 944         m_rollback(NULL),
 945         m_rollback_sink_enabled(true),
 946         m_enable_rollback_recording(false),
 947         m_emerge(NULL),
 948         m_lua(NULL),
 949         m_itemdef(createItemDefManager()),
 950         m_nodedef(createNodeDefManager()),
 951         m_craftdef(createCraftDefManager()),
 952         m_event(new EventManager()),
 953         m_thread(this),
 954         m_emergethread(this),
 955         m_time_of_day_send_timer(0),
 956         m_uptime(0),
 957         m_shutdown_requested(false),
 958         m_ignore_map_edit_events(false),
 959         m_ignore_map_edit_events_peer_id(0)
 960 {
 961         m_liquid_transform_timer = 0.0;
 962         m_print_info_timer = 0.0;
 963         m_objectdata_timer = 0.0;
 964         m_emergethread_trigger_timer = 0.0;
 965         m_savemap_timer = 0.0;
 966
 967         m_env_mutex.Init();
 968         m_con_mutex.Init();
 969         m_step_dtime_mutex.Init();
 970         m_step_dtime = 0.0;
 971
 972         if(path_world == "")
 973                 throw ServerError("Supplied empty world path");
 974
 975         if(!gamespec.isValid())
 976                 throw ServerError("Supplied invalid gamespec");
 977
 978         infostream<<"Server created for gameid \""<<m_gamespec.id<<"\"";
 979         if(m_simple_singleplayer_mode)
 980                 infostream<<" in simple singleplayer mode"<<std::endl;
 981         else
 982                 infostream<<std::endl;
 983         infostream<<"- world:  "<<m_path_world<<std::endl;
 984         infostream<<"- config: "<<m_path_config<<std::endl;
 985         infostream<<"- game:   "<<m_gamespec.path<<std::endl;
 986
 987         // Create emerge manager
 988         m_emerge = new EmergeManager(this, g_settings->getS16("use_mapgen_version"));
 989
 990         // Create rollback manager
 991         std::string rollback_path = m_path_world+DIR_DELIM+"rollback.txt";
 992         m_rollback = createRollbackManager(rollback_path, this);
 993
 994         // Create world if it doesn't exist
 995         if(!initializeWorld(m_path_world, m_gamespec.id))
 996                 throw ServerError("Failed to initialize world");
 997
 998         ModConfiguration modconf(m_path_world);
 999         m_mods = modconf.getMods();
1000         // complain about mods with unsatisfied dependencies
1001         if(!modconf.isConsistent())
1002         {
1003                 errorstream << "The following mods have unsatisfied dependencies: ";
1004                 std::list<ModSpec> modlist = modconf.getUnsatisfiedMods();
1005                 for(std::list<ModSpec>::iterator it = modlist.begin();
1006                         it != modlist.end(); ++it)
1007                 {
1008                         errorstream << (*it).name << " ";
1009                 }
1010                 errorstream << std::endl;
1011         }
1012
1013         Settings worldmt_settings;
1014         std::string worldmt = m_path_world + DIR_DELIM + "world.mt";
1015         worldmt_settings.readConfigFile(worldmt.c_str());
1016         std::vector<std::string> names = worldmt_settings.getNames();
1017         std::set<std::string> exclude_mod_names;
1018         std::set<std::string> load_mod_names;
1019         for(std::vector<std::string>::iterator it = names.begin();
1020                 it != names.end(); ++it)
1021         {
1022                 std::string name = *it;
1023                 if (name.compare(0,9,"load_mod_")==0)
1024                 {
1025                         if(worldmt_settings.getBool(name))
1026                                 load_mod_names.insert(name.substr(9));
1027                         else
1028                                 exclude_mod_names.insert(name.substr(9));
1029                 }
1030         }
1031         // complain about mods declared to be loaded, but not found
1032         for(std::vector<ModSpec>::iterator it = m_mods.begin();
1033                 it != m_mods.end(); ++it)
1034                 load_mod_names.erase((*it).name);
1035         if(!load_mod_names.empty())
1036         {
1037                 errorstream << "The following mods could not be found: ";
1038                 for(std::set<std::string>::iterator it = load_mod_names.begin();
1039                         it != load_mod_names.end(); ++it)
1040                         errorstream << (*it) << " ";
1041                 errorstream << std::endl;
1042         }
1043
1044         // Path to builtin.lua
1045         std::string builtinpath = getBuiltinLuaPath() + DIR_DELIM + "builtin.lua";
1046
1047         // Lock environment
1048         JMutexAutoLock envlock(m_env_mutex);
1049         JMutexAutoLock conlock(m_con_mutex);
1050
1051         // Initialize scripting
1052
1053         infostream<<"Server: Initializing Lua"<<std::endl;
1054         m_lua = script_init();
1055         assert(m_lua);
1056         // Export API
1057         scriptapi_export(m_lua, this);
1058         // Load and run builtin.lua
1059         infostream<<"Server: Loading builtin.lua [\""
1060                         <<builtinpath<<"\"]"<<std::endl;
1061         bool success = scriptapi_loadmod(m_lua, builtinpath, "__builtin");
1062         if(!success){
1063                 errorstream<<"Server: Failed to load and run "
1064                                 <<builtinpath<<std::endl;
1065                 throw ModError("Failed to load and run "+builtinpath);
1066         }
1067         // Print 'em
1068         infostream<<"Server: Loading mods: ";
1069         for(std::vector<ModSpec>::iterator i = m_mods.begin();
1070                         i != m_mods.end(); i++){
1071                 const ModSpec &mod = *i;
1072                 infostream<<mod.name<<" ";
1073         }
1074         infostream<<std::endl;
1075         // Load and run "mod" scripts
1076         for(std::vector<ModSpec>::iterator i = m_mods.begin();
1077                         i != m_mods.end(); i++){
1078                 const ModSpec &mod = *i;
1079                 std::string scriptpath = mod.path + DIR_DELIM + "init.lua";
1080                 infostream<<"  ["<<padStringRight(mod.name, 12)<<"] [\""
1081                                 <<scriptpath<<"\"]"<<std::endl;
1082                 bool success = scriptapi_loadmod(m_lua, scriptpath, mod.name);
1083                 if(!success){
1084                         errorstream<<"Server: Failed to load and run "
1085                                         <<scriptpath<<std::endl;
1086                         throw ModError("Failed to load and run "+scriptpath);
1087                 }
1088         }
1089
1090         // Read Textures and calculate sha1 sums
1091         fillMediaCache();
1092
1093         // Apply item aliases in the node definition manager
1094         m_nodedef->updateAliases(m_itemdef);
1095
1096         // Add default biomes after nodedef had its aliases added
1097         if (m_emerge->biomedef)
1098                 m_emerge->biomedef->addDefaultBiomes();
1099
1100         // Initialize Environment
1101
1102         m_env = new ServerEnvironment(new ServerMap(path_world, this, m_emerge), m_lua,
1103                         this, this);
1104
1105         // Give environment reference to scripting api
1106         scriptapi_add_environment(m_lua, m_env);
1107
1108         // Register us to receive map edit events
1109         m_env->getMap().addEventReceiver(this);
1110
1111         // If file exists, load environment metadata
1112         if(fs::PathExists(m_path_world+DIR_DELIM+"env_meta.txt"))
1113         {
1114                 infostream<<"Server: Loading environment metadata"<<std::endl;
1115                 m_env->loadMeta(m_path_world);
1116         }
1117
1118         // Load players
1119         infostream<<"Server: Loading players"<<std::endl;
1120         m_env->deSerializePlayers(m_path_world);
1121
1122         /*
1123                 Add some test ActiveBlockModifiers to environment
1124         */
1125         add_legacy_abms(m_env, m_nodedef);
1126 }
1127
1128 Server::~Server()
1129 {
1130         infostream<<"Server destructing"<<std::endl;
1131
1132         /*
1133                 Send shutdown message
1134         */
1135         {
1136                 JMutexAutoLock conlock(m_con_mutex);
1137
1138                 std::wstring line = L"*** Server shutting down";
1139
1140                 /*
1141                         Send the message to clients
1142                 */
1143                 for(core::map<u16, RemoteClient*>::Iterator
1144                         i = m_clients.getIterator();
1145                         i.atEnd() == false; i++)
1146                 {
1147                         // Get client and check that it is valid
1148                         RemoteClient *client = i.getNode()->getValue();
1149                         assert(client->peer_id == i.getNode()->getKey());
1150                         if(client->serialization_version == SER_FMT_VER_INVALID)
1151                                 continue;
1152
1153                         try{
1154                                 SendChatMessage(client->peer_id, line);
1155                         }
1156                         catch(con::PeerNotFoundException &e)
1157                         {}
1158                 }
1159         }
1160
1161         {
1162                 JMutexAutoLock envlock(m_env_mutex);
1163                 JMutexAutoLock conlock(m_con_mutex);
1164
1165                 /*
1166                         Execute script shutdown hooks
1167                 */
1168                 scriptapi_on_shutdown(m_lua);
1169         }
1170
1171         {
1172                 JMutexAutoLock envlock(m_env_mutex);
1173
1174                 /*
1175                         Save players
1176                 */
1177                 infostream<<"Server: Saving players"<<std::endl;
1178                 m_env->serializePlayers(m_path_world);
1179
1180                 /*
1181                         Save environment metadata
1182                 */
1183                 infostream<<"Server: Saving environment metadata"<<std::endl;
1184                 m_env->saveMeta(m_path_world);
1185         }
1186
1187         /*
1188                 Stop threads
1189         */
1190         stop();
1191
1192         /*
1193                 Delete clients
1194         */
1195         {
1196                 JMutexAutoLock clientslock(m_con_mutex);
1197
1198                 for(core::map<u16, RemoteClient*>::Iterator
1199                         i = m_clients.getIterator();
1200                         i.atEnd() == false; i++)
1201                 {
1202
1203                         // Delete client
1204                         delete i.getNode()->getValue();
1205                 }
1206         }
1207
1208         // Delete things in the reverse order of creation
1209         delete m_env;
1210         delete m_rollback;
1211         delete m_emerge;
1212         delete m_event;
1213         delete m_itemdef;
1214         delete m_nodedef;
1215         delete m_craftdef;
1216
1217         // Deinitialize scripting
1218         infostream<<"Server: Deinitializing scripting"<<std::endl;
1219         script_deinit(m_lua);
1220
1221         // Delete detached inventories
1222         {
1223                 for(std::map<std::string, Inventory*>::iterator
1224                                 i = m_detached_inventories.begin();
1225                                 i != m_detached_inventories.end(); i++){
1226                         delete i->second;
1227                 }
1228         }
1229 }
1230
1231 void Server::start(unsigned short port)
1232 {
1233         DSTACK(__FUNCTION_NAME);
1234         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1235
1236         // Stop thread if already running
1237         m_thread.stop();
1238
1239         // Initialize connection
1240         m_con.SetTimeoutMs(30);
1241         m_con.Serve(port);
1242
1243         // Start thread
1244         m_thread.setRun(true);
1245         m_thread.Start();
1246
1247         // ASCII art for the win!
1248         actionstream
1249         <<"        .__               __                   __   "<<std::endl
1250         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1251         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1252         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1253         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1254         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1255         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1256         actionstream<<"Server for gameid=\""<<m_gamespec.id
1257                         <<"\" listening on port "<<port<<"."<<std::endl;
1258 }
1259
1260 void Server::stop()
1261 {
1262         DSTACK(__FUNCTION_NAME);
1263
1264         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1265
1266         // Stop threads (set run=false first so both start stopping)
1267         m_thread.setRun(false);
1268         m_emergethread.setRun(false);
1269         m_thread.stop();
1270         m_emergethread.stop();
1271
1272         infostream<<"Server: Threads stopped"<<std::endl;
1273 }
1274
1275 void Server::step(float dtime)
1276 {
1277         DSTACK(__FUNCTION_NAME);
1278         // Limit a bit
1279         if(dtime > 2.0)
1280                 dtime = 2.0;
1281         {
1282                 JMutexAutoLock lock(m_step_dtime_mutex);
1283                 m_step_dtime += dtime;
1284         }
1285         // Throw if fatal error occurred in thread
1286         std::string async_err = m_async_fatal_error.get();
1287         if(async_err != ""){
1288                 throw ServerError(async_err);
1289         }
1290 }
1291
1292 void Server::AsyncRunStep()
1293 {
1294         DSTACK(__FUNCTION_NAME);
1295
1296         g_profiler->add("Server::AsyncRunStep (num)", 1);
1297
1298         float dtime;
1299         {
1300                 JMutexAutoLock lock1(m_step_dtime_mutex);
1301                 dtime = m_step_dtime;
1302         }
1303
1304         {
1305                 // Send blocks to clients
1306                 SendBlocks(dtime);
1307         }
1308
1309         if(dtime < 0.001)
1310                 return;
1311
1312         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1313
1314         //infostream<<"Server steps "<<dtime<<std::endl;
1315         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1316
1317         {
1318                 JMutexAutoLock lock1(m_step_dtime_mutex);
1319                 m_step_dtime -= dtime;
1320         }
1321
1322         /*
1323                 Update uptime
1324         */
1325         {
1326                 m_uptime.set(m_uptime.get() + dtime);
1327         }
1328
1329         {
1330                 // Process connection's timeouts
1331                 JMutexAutoLock lock2(m_con_mutex);
1332                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1333                 m_con.RunTimeouts(dtime);
1334         }
1335
1336         {
1337                 // This has to be called so that the client list gets synced
1338                 // with the peer list of the connection
1339                 handlePeerChanges();
1340         }
1341
1342         /*
1343                 Update time of day and overall game time
1344         */
1345         {
1346                 JMutexAutoLock envlock(m_env_mutex);
1347
1348                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1349
1350                 /*
1351                         Send to clients at constant intervals
1352                 */
1353
1354                 m_time_of_day_send_timer -= dtime;
1355                 if(m_time_of_day_send_timer < 0.0)
1356                 {
1357                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1358
1359                         //JMutexAutoLock envlock(m_env_mutex);
1360                         JMutexAutoLock conlock(m_con_mutex);
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                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1368                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1369                                 // Send as reliable
1370                                 m_con.Send(client->peer_id, 0, data, true);
1371                         }
1372                 }
1373         }
1374
1375         {
1376                 JMutexAutoLock lock(m_env_mutex);
1377                 // Step environment
1378                 ScopeProfiler sp(g_profiler, "SEnv step");
1379                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1380                 m_env->step(dtime);
1381         }
1382
1383         const float map_timer_and_unload_dtime = 2.92;
1384         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1385         {
1386                 JMutexAutoLock lock(m_env_mutex);
1387                 // Run Map's timers and unload unused data
1388                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1389                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1390                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1391         }
1392
1393         /*
1394                 Do background stuff
1395         */
1396
1397         /*
1398                 Handle players
1399         */
1400         {
1401                 JMutexAutoLock lock(m_env_mutex);
1402                 JMutexAutoLock lock2(m_con_mutex);
1403
1404                 ScopeProfiler sp(g_profiler, "Server: handle players");
1405
1406                 for(core::map<u16, RemoteClient*>::Iterator
1407                         i = m_clients.getIterator();
1408                         i.atEnd() == false; i++)
1409                 {
1410                         RemoteClient *client = i.getNode()->getValue();
1411                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1412                         if(playersao == NULL)
1413                                 continue;
1414
1415                         /*
1416                                 Handle player HPs (die if hp=0)
1417                         */
1418                         if(playersao->m_hp_not_sent && g_settings->getBool("enable_damage"))
1419                         {
1420                                 if(playersao->getHP() == 0)
1421                                         DiePlayer(client->peer_id);
1422                                 else
1423                                         SendPlayerHP(client->peer_id);
1424                         }
1425
1426                         /*
1427                                 Send player inventories if necessary
1428                         */
1429                         if(playersao->m_moved){
1430                                 SendMovePlayer(client->peer_id);
1431                                 playersao->m_moved = false;
1432                         }
1433                         if(playersao->m_inventory_not_sent){
1434                                 UpdateCrafting(client->peer_id);
1435                                 SendInventory(client->peer_id);
1436                         }
1437                 }
1438         }
1439
1440         /* Transform liquids */
1441         m_liquid_transform_timer += dtime;
1442         if(m_liquid_transform_timer >= 1.00)
1443         {
1444                 m_liquid_transform_timer -= 1.00;
1445
1446                 JMutexAutoLock lock(m_env_mutex);
1447
1448                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1449
1450                 core::map<v3s16, MapBlock*> modified_blocks;
1451                 m_env->getMap().transformLiquids(modified_blocks);
1452 #if 0
1453                 /*
1454                         Update lighting
1455                 */
1456                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1457                 ServerMap &map = ((ServerMap&)m_env->getMap());
1458                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1459
1460                 // Add blocks modified by lighting to modified_blocks
1461                 for(core::map<v3s16, MapBlock*>::Iterator
1462                                 i = lighting_modified_blocks.getIterator();
1463                                 i.atEnd() == false; i++)
1464                 {
1465                         MapBlock *block = i.getNode()->getValue();
1466                         modified_blocks.insert(block->getPos(), block);
1467                 }
1468 #endif
1469                 /*
1470                         Set the modified blocks unsent for all the clients
1471                 */
1472
1473                 JMutexAutoLock lock2(m_con_mutex);
1474
1475                 for(core::map<u16, RemoteClient*>::Iterator
1476                                 i = m_clients.getIterator();
1477                                 i.atEnd() == false; i++)
1478                 {
1479                         RemoteClient *client = i.getNode()->getValue();
1480
1481                         if(modified_blocks.size() > 0)
1482                         {
1483                                 // Remove block from sent history
1484                                 client->SetBlocksNotSent(modified_blocks);
1485                         }
1486                 }
1487         }
1488
1489         // Periodically print some info
1490         {
1491                 float &counter = m_print_info_timer;
1492                 counter += dtime;
1493                 if(counter >= 30.0)
1494                 {
1495                         counter = 0.0;
1496
1497                         JMutexAutoLock lock2(m_con_mutex);
1498
1499                         if(m_clients.size() != 0)
1500                                 infostream<<"Players:"<<std::endl;
1501                         for(core::map<u16, RemoteClient*>::Iterator
1502                                 i = m_clients.getIterator();
1503                                 i.atEnd() == false; i++)
1504                         {
1505                                 //u16 peer_id = i.getNode()->getKey();
1506                                 RemoteClient *client = i.getNode()->getValue();
1507                                 Player *player = m_env->getPlayer(client->peer_id);
1508                                 if(player==NULL)
1509                                         continue;
1510                                 infostream<<"* "<<player->getName()<<"\t";
1511                                 client->PrintInfo(infostream);
1512                         }
1513                 }
1514         }
1515
1516         //if(g_settings->getBool("enable_experimental"))
1517         {
1518
1519         /*
1520                 Check added and deleted active objects
1521         */
1522         {
1523                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1524                 JMutexAutoLock envlock(m_env_mutex);
1525                 JMutexAutoLock conlock(m_con_mutex);
1526
1527                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1528
1529                 // Radius inside which objects are active
1530                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1531                 radius *= MAP_BLOCKSIZE;
1532
1533                 for(core::map<u16, RemoteClient*>::Iterator
1534                         i = m_clients.getIterator();
1535                         i.atEnd() == false; i++)
1536                 {
1537                         RemoteClient *client = i.getNode()->getValue();
1538
1539                         // If definitions and textures have not been sent, don't
1540                         // send objects either
1541                         if(!client->definitions_sent)
1542                                 continue;
1543
1544                         Player *player = m_env->getPlayer(client->peer_id);
1545                         if(player==NULL)
1546                         {
1547                                 // This can happen if the client timeouts somehow
1548                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1549                                                 <<client->peer_id
1550                                                 <<" has no associated player"<<std::endl;*/
1551                                 continue;
1552                         }
1553                         v3s16 pos = floatToInt(player->getPosition(), BS);
1554
1555                         core::map<u16, bool> removed_objects;
1556                         core::map<u16, bool> added_objects;
1557                         m_env->getRemovedActiveObjects(pos, radius,
1558                                         client->m_known_objects, removed_objects);
1559                         m_env->getAddedActiveObjects(pos, radius,
1560                                         client->m_known_objects, added_objects);
1561
1562                         // Ignore if nothing happened
1563                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1564                         {
1565                                 //infostream<<"active objects: none changed"<<std::endl;
1566                                 continue;
1567                         }
1568
1569                         std::string data_buffer;
1570
1571                         char buf[4];
1572
1573                         // Handle removed objects
1574                         writeU16((u8*)buf, removed_objects.size());
1575                         data_buffer.append(buf, 2);
1576                         for(core::map<u16, bool>::Iterator
1577                                         i = removed_objects.getIterator();
1578                                         i.atEnd()==false; i++)
1579                         {
1580                                 // Get object
1581                                 u16 id = i.getNode()->getKey();
1582                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1583
1584                                 // Add to data buffer for sending
1585                                 writeU16((u8*)buf, i.getNode()->getKey());
1586                                 data_buffer.append(buf, 2);
1587
1588                                 // Remove from known objects
1589                                 client->m_known_objects.remove(i.getNode()->getKey());
1590
1591                                 if(obj && obj->m_known_by_count > 0)
1592                                         obj->m_known_by_count--;
1593                         }
1594
1595                         // Handle added objects
1596                         writeU16((u8*)buf, added_objects.size());
1597                         data_buffer.append(buf, 2);
1598                         for(core::map<u16, bool>::Iterator
1599                                         i = added_objects.getIterator();
1600                                         i.atEnd()==false; i++)
1601                         {
1602                                 // Get object
1603                                 u16 id = i.getNode()->getKey();
1604                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1605
1606                                 // Get object type
1607                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1608                                 if(obj == NULL)
1609                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1610                                                         <<": NULL object"<<std::endl;
1611                                 else
1612                                         type = obj->getSendType();
1613
1614                                 // Add to data buffer for sending
1615                                 writeU16((u8*)buf, id);
1616                                 data_buffer.append(buf, 2);
1617                                 writeU8((u8*)buf, type);
1618                                 data_buffer.append(buf, 1);
1619
1620                                 if(obj)
1621                                         data_buffer.append(serializeLongString(
1622                                                         obj->getClientInitializationData(client->net_proto_version)));
1623                                 else
1624                                         data_buffer.append(serializeLongString(""));
1625
1626                                 // Add to known objects
1627                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1628
1629                                 if(obj)
1630                                         obj->m_known_by_count++;
1631                         }
1632
1633                         // Send packet
1634                         SharedBuffer<u8> reply(2 + data_buffer.size());
1635                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1636                         memcpy((char*)&reply[2], data_buffer.c_str(),
1637                                         data_buffer.size());
1638                         // Send as reliable
1639                         m_con.Send(client->peer_id, 0, reply, true);
1640
1641                         verbosestream<<"Server: Sent object remove/add: "
1642                                         <<removed_objects.size()<<" removed, "
1643                                         <<added_objects.size()<<" added, "
1644                                         <<"packet size is "<<reply.getSize()<<std::endl;
1645                 }
1646
1647 #if 0
1648                 /*
1649                         Collect a list of all the objects known by the clients
1650                         and report it back to the environment.
1651                 */
1652
1653                 core::map<u16, bool> all_known_objects;
1654
1655                 for(core::map<u16, RemoteClient*>::Iterator
1656                         i = m_clients.getIterator();
1657                         i.atEnd() == false; i++)
1658                 {
1659                         RemoteClient *client = i.getNode()->getValue();
1660                         // Go through all known objects of client
1661                         for(core::map<u16, bool>::Iterator
1662                                         i = client->m_known_objects.getIterator();
1663                                         i.atEnd()==false; i++)
1664                         {
1665                                 u16 id = i.getNode()->getKey();
1666                                 all_known_objects[id] = true;
1667                         }
1668                 }
1669
1670                 m_env->setKnownActiveObjects(whatever);
1671 #endif
1672
1673         }
1674
1675         /*
1676                 Send object messages
1677         */
1678         {
1679                 JMutexAutoLock envlock(m_env_mutex);
1680                 JMutexAutoLock conlock(m_con_mutex);
1681
1682                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1683
1684                 // Key = object id
1685                 // Value = data sent by object
1686                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1687
1688                 // Get active object messages from environment
1689                 for(;;)
1690                 {
1691                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1692                         if(aom.id == 0)
1693                                 break;
1694
1695                         core::list<ActiveObjectMessage>* message_list = NULL;
1696                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1697                         n = buffered_messages.find(aom.id);
1698                         if(n == NULL)
1699                         {
1700                                 message_list = new core::list<ActiveObjectMessage>;
1701                                 buffered_messages.insert(aom.id, message_list);
1702                         }
1703                         else
1704                         {
1705                                 message_list = n->getValue();
1706                         }
1707                         message_list->push_back(aom);
1708                 }
1709
1710                 // Route data to every client
1711                 for(core::map<u16, RemoteClient*>::Iterator
1712                         i = m_clients.getIterator();
1713                         i.atEnd()==false; i++)
1714                 {
1715                         RemoteClient *client = i.getNode()->getValue();
1716                         std::string reliable_data;
1717                         std::string unreliable_data;
1718                         // Go through all objects in message buffer
1719                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1720                                         j = buffered_messages.getIterator();
1721                                         j.atEnd()==false; j++)
1722                         {
1723                                 // If object is not known by client, skip it
1724                                 u16 id = j.getNode()->getKey();
1725                                 if(client->m_known_objects.find(id) == NULL)
1726                                         continue;
1727                                 // Get message list of object
1728                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1729                                 // Go through every message
1730                                 for(core::list<ActiveObjectMessage>::Iterator
1731                                                 k = list->begin(); k != list->end(); k++)
1732                                 {
1733                                         // Compose the full new data with header
1734                                         ActiveObjectMessage aom = *k;
1735                                         std::string new_data;
1736                                         // Add object id
1737                                         char buf[2];
1738                                         writeU16((u8*)&buf[0], aom.id);
1739                                         new_data.append(buf, 2);
1740                                         // Add data
1741                                         new_data += serializeString(aom.datastring);
1742                                         // Add data to buffer
1743                                         if(aom.reliable)
1744                                                 reliable_data += new_data;
1745                                         else
1746                                                 unreliable_data += new_data;
1747                                 }
1748                         }
1749                         /*
1750                                 reliable_data and unreliable_data are now ready.
1751                                 Send them.
1752                         */
1753                         if(reliable_data.size() > 0)
1754                         {
1755                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1756                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1757                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1758                                                 reliable_data.size());
1759                                 // Send as reliable
1760                                 m_con.Send(client->peer_id, 0, reply, true);
1761                         }
1762                         if(unreliable_data.size() > 0)
1763                         {
1764                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1765                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1766                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1767                                                 unreliable_data.size());
1768                                 // Send as unreliable
1769                                 m_con.Send(client->peer_id, 0, reply, false);
1770                         }
1771
1772                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1773                         {
1774                                 infostream<<"Server: Size of object message data: "
1775                                                 <<"reliable: "<<reliable_data.size()
1776                                                 <<", unreliable: "<<unreliable_data.size()
1777                                                 <<std::endl;
1778                         }*/
1779                 }
1780
1781                 // Clear buffered_messages
1782                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1783                                 i = buffered_messages.getIterator();
1784                                 i.atEnd()==false; i++)
1785                 {
1786                         delete i.getNode()->getValue();
1787                 }
1788         }
1789
1790         } // enable_experimental
1791
1792         /*
1793                 Send queued-for-sending map edit events.
1794         */
1795         {
1796                 // We will be accessing the environment and the connection
1797                 JMutexAutoLock lock(m_env_mutex);
1798                 JMutexAutoLock conlock(m_con_mutex);
1799
1800                 // Don't send too many at a time
1801                 //u32 count = 0;
1802
1803                 // Single change sending is disabled if queue size is not small
1804                 bool disable_single_change_sending = false;
1805                 if(m_unsent_map_edit_queue.size() >= 4)
1806                         disable_single_change_sending = true;
1807
1808                 int event_count = m_unsent_map_edit_queue.size();
1809
1810                 // We'll log the amount of each
1811                 Profiler prof;
1812
1813                 while(m_unsent_map_edit_queue.size() != 0)
1814                 {
1815                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1816
1817                         // Players far away from the change are stored here.
1818                         // Instead of sending the changes, MapBlocks are set not sent
1819                         // for them.
1820                         core::list<u16> far_players;
1821
1822                         if(event->type == MEET_ADDNODE)
1823                         {
1824                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1825                                 prof.add("MEET_ADDNODE", 1);
1826                                 if(disable_single_change_sending)
1827                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1828                                                         &far_players, 5);
1829                                 else
1830                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1831                                                         &far_players, 30);
1832                         }
1833                         else if(event->type == MEET_REMOVENODE)
1834                         {
1835                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1836                                 prof.add("MEET_REMOVENODE", 1);
1837                                 if(disable_single_change_sending)
1838                                         sendRemoveNode(event->p, event->already_known_by_peer,
1839                                                         &far_players, 5);
1840                                 else
1841                                         sendRemoveNode(event->p, event->already_known_by_peer,
1842                                                         &far_players, 30);
1843                         }
1844                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1845                         {
1846                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1847                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1848                                 setBlockNotSent(event->p);
1849                         }
1850                         else if(event->type == MEET_OTHER)
1851                         {
1852                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1853                                 prof.add("MEET_OTHER", 1);
1854                                 for(core::map<v3s16, bool>::Iterator
1855                                                 i = event->modified_blocks.getIterator();
1856                                                 i.atEnd()==false; i++)
1857                                 {
1858                                         v3s16 p = i.getNode()->getKey();
1859                                         setBlockNotSent(p);
1860                                 }
1861                         }
1862                         else
1863                         {
1864                                 prof.add("unknown", 1);
1865                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1866                                                 <<((u32)event->type)<<std::endl;
1867                         }
1868
1869                         /*
1870                                 Set blocks not sent to far players
1871                         */
1872                         if(far_players.size() > 0)
1873                         {
1874                                 // Convert list format to that wanted by SetBlocksNotSent
1875                                 core::map<v3s16, MapBlock*> modified_blocks2;
1876                                 for(core::map<v3s16, bool>::Iterator
1877                                                 i = event->modified_blocks.getIterator();
1878                                                 i.atEnd()==false; i++)
1879                                 {
1880                                         v3s16 p = i.getNode()->getKey();
1881                                         modified_blocks2.insert(p,
1882                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1883                                 }
1884                                 // Set blocks not sent
1885                                 for(core::list<u16>::Iterator
1886                                                 i = far_players.begin();
1887                                                 i != far_players.end(); i++)
1888                                 {
1889                                         u16 peer_id = *i;
1890                                         RemoteClient *client = getClient(peer_id);
1891                                         if(client==NULL)
1892                                                 continue;
1893                                         client->SetBlocksNotSent(modified_blocks2);
1894                                 }
1895                         }
1896
1897                         delete event;
1898
1899                         /*// Don't send too many at a time
1900                         count++;
1901                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1902                                 break;*/
1903                 }
1904
1905                 if(event_count >= 5){
1906                         infostream<<"Server: MapEditEvents:"<<std::endl;
1907                         prof.print(infostream);
1908                 } else if(event_count != 0){
1909                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1910                         prof.print(verbosestream);
1911                 }
1912
1913         }
1914
1915         /*
1916                 Trigger emergethread (it somehow gets to a non-triggered but
1917                 bysy state sometimes)
1918         */
1919         {
1920                 float &counter = m_emergethread_trigger_timer;
1921                 counter += dtime;
1922                 if(counter >= 2.0)
1923                 {
1924                         counter = 0.0;
1925
1926                         m_emergethread.trigger();
1927
1928                         // Update m_enable_rollback_recording here too
1929                         m_enable_rollback_recording =
1930                                         g_settings->getBool("enable_rollback_recording");
1931                 }
1932         }
1933
1934         // Save map, players and auth stuff
1935         {
1936                 float &counter = m_savemap_timer;
1937                 counter += dtime;
1938                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1939                 {
1940                         counter = 0.0;
1941                         JMutexAutoLock lock(m_env_mutex);
1942
1943                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1944
1945                         //Ban stuff
1946                         if(m_banmanager.isModified())
1947                                 m_banmanager.save();
1948
1949                         // Save changed parts of map
1950                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1951
1952                         // Save players
1953                         m_env->serializePlayers(m_path_world);
1954
1955                         // Save environment metadata
1956                         m_env->saveMeta(m_path_world);
1957                 }
1958         }
1959 }
1960
1961 void Server::Receive()
1962 {
1963         DSTACK(__FUNCTION_NAME);
1964         SharedBuffer<u8> data;
1965         u16 peer_id;
1966         u32 datasize;
1967         try{
1968                 {
1969                         JMutexAutoLock conlock(m_con_mutex);
1970                         datasize = m_con.Receive(peer_id, data);
1971                 }
1972
1973                 // This has to be called so that the client list gets synced
1974                 // with the peer list of the connection
1975                 handlePeerChanges();
1976
1977                 ProcessData(*data, datasize, peer_id);
1978         }
1979         catch(con::InvalidIncomingDataException &e)
1980         {
1981                 infostream<<"Server::Receive(): "
1982                                 "InvalidIncomingDataException: what()="
1983                                 <<e.what()<<std::endl;
1984         }
1985         catch(con::PeerNotFoundException &e)
1986         {
1987                 //NOTE: This is not needed anymore
1988
1989                 // The peer has been disconnected.
1990                 // Find the associated player and remove it.
1991
1992                 /*JMutexAutoLock envlock(m_env_mutex);
1993
1994                 infostream<<"ServerThread: peer_id="<<peer_id
1995                                 <<" has apparently closed connection. "
1996                                 <<"Removing player."<<std::endl;
1997
1998                 m_env->removePlayer(peer_id);*/
1999         }
2000 }
2001
2002 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
2003 {
2004         DSTACK(__FUNCTION_NAME);
2005         // Environment is locked first.
2006         JMutexAutoLock envlock(m_env_mutex);
2007         JMutexAutoLock conlock(m_con_mutex);
2008
2009         ScopeProfiler sp(g_profiler, "Server::ProcessData");
2010
2011         try{
2012                 Address address = m_con.GetPeerAddress(peer_id);
2013                 std::string addr_s = address.serializeString();
2014
2015                 // drop player if is ip is banned
2016                 if(m_banmanager.isIpBanned(addr_s)){
2017                         infostream<<"Server: A banned client tried to connect from "
2018                                         <<addr_s<<"; banned name was "
2019                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
2020                         // This actually doesn't seem to transfer to the client
2021                         SendAccessDenied(m_con, peer_id,
2022                                         L"Your ip is banned. Banned name was "
2023                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
2024                         m_con.DeletePeer(peer_id);
2025                         return;
2026                 }
2027         }
2028         catch(con::PeerNotFoundException &e)
2029         {
2030                 infostream<<"Server::ProcessData(): Cancelling: peer "
2031                                 <<peer_id<<" not found"<<std::endl;
2032                 return;
2033         }
2034
2035         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
2036
2037         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
2038
2039         try
2040         {
2041
2042         if(datasize < 2)
2043                 return;
2044
2045         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
2046
2047         if(command == TOSERVER_INIT)
2048         {
2049                 // [0] u16 TOSERVER_INIT
2050                 // [2] u8 SER_FMT_VER_HIGHEST
2051                 // [3] u8[20] player_name
2052                 // [23] u8[28] password <--- can be sent without this, from old versions
2053
2054                 if(datasize < 2+1+PLAYERNAME_SIZE)
2055                         return;
2056
2057                 verbosestream<<"Server: Got TOSERVER_INIT from "
2058                                 <<peer_id<<std::endl;
2059
2060                 // First byte after command is maximum supported
2061                 // serialization version
2062                 u8 client_max = data[2];
2063                 u8 our_max = SER_FMT_VER_HIGHEST;
2064                 // Use the highest version supported by both
2065                 u8 deployed = core::min_(client_max, our_max);
2066                 // If it's lower than the lowest supported, give up.
2067                 if(deployed < SER_FMT_VER_LOWEST)
2068                         deployed = SER_FMT_VER_INVALID;
2069
2070                 //peer->serialization_version = deployed;
2071                 getClient(peer_id)->pending_serialization_version = deployed;
2072
2073                 if(deployed == SER_FMT_VER_INVALID)
2074                 {
2075                         actionstream<<"Server: A mismatched client tried to connect from "
2076                                         <<addr_s<<std::endl;
2077                         infostream<<"Server: Cannot negotiate "
2078                                         "serialization version with peer "
2079                                         <<peer_id<<std::endl;
2080                         SendAccessDenied(m_con, peer_id, std::wstring(
2081                                         L"Your client's version is not supported.\n"
2082                                         L"Server version is ")
2083                                         + narrow_to_wide(VERSION_STRING) + L"."
2084                         );
2085                         return;
2086                 }
2087
2088                 /*
2089                         Read and check network protocol version
2090                 */
2091
2092                 u16 min_net_proto_version = 0;
2093                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2094                         min_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2095
2096                 // Use same version as minimum and maximum if maximum version field
2097                 // doesn't exist (backwards compatibility)
2098                 u16 max_net_proto_version = min_net_proto_version;
2099                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2+2)
2100                         max_net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2]);
2101
2102                 // Start with client's maximum version
2103                 u16 net_proto_version = max_net_proto_version;
2104
2105                 // Figure out a working version if it is possible at all
2106                 if(max_net_proto_version >= SERVER_PROTOCOL_VERSION_MIN ||
2107                                 min_net_proto_version <= SERVER_PROTOCOL_VERSION_MAX)
2108                 {
2109                         // If maximum is larger than our maximum, go with our maximum
2110                         if(max_net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2111                                 net_proto_version = SERVER_PROTOCOL_VERSION_MAX;
2112                         // Else go with client's maximum
2113                         else
2114                                 net_proto_version = max_net_proto_version;
2115                 }
2116
2117                 verbosestream<<"Server: "<<peer_id<<" Protocol version: min: "
2118                                 <<min_net_proto_version<<", max: "<<max_net_proto_version
2119                                 <<", chosen: "<<net_proto_version<<std::endl;
2120
2121                 getClient(peer_id)->net_proto_version = net_proto_version;
2122
2123                 if(net_proto_version < SERVER_PROTOCOL_VERSION_MIN ||
2124                                 net_proto_version > SERVER_PROTOCOL_VERSION_MAX)
2125                 {
2126                         actionstream<<"Server: A mismatched client tried to connect from "<<addr_s
2127                                         <<std::endl;
2128                         SendAccessDenied(m_con, peer_id, std::wstring(
2129                                         L"Your client's version is not supported.\n"
2130                                         L"Server version is ")
2131                                         + narrow_to_wide(VERSION_STRING) + L",\n"
2132                                         + L"server's PROTOCOL_VERSION is "
2133                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
2134                                         + L"..."
2135                                         + narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
2136                                         + L", client's PROTOCOL_VERSION is "
2137                                         + narrow_to_wide(itos(min_net_proto_version))
2138                                         + L"..."
2139                                         + narrow_to_wide(itos(max_net_proto_version))
2140                         );
2141                         return;
2142                 }
2143
2144                 if(g_settings->getBool("strict_protocol_version_checking"))
2145                 {
2146                         if(net_proto_version != LATEST_PROTOCOL_VERSION)
2147                         {
2148                                 actionstream<<"Server: A mismatched (strict) client tried to "
2149                                                 <<"connect from "<<addr_s<<std::endl;
2150                                 SendAccessDenied(m_con, peer_id, std::wstring(
2151                                                 L"Your client's version is not supported.\n"
2152                                                 L"Server version is ")
2153                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2154                                                 + L"server's PROTOCOL_VERSION (strict) is "
2155                                                 + narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
2156                                                 + L", client's PROTOCOL_VERSION is "
2157                                                 + narrow_to_wide(itos(min_net_proto_version))
2158                                                 + L"..."
2159                                                 + narrow_to_wide(itos(max_net_proto_version))
2160                                 );
2161                                 return;
2162                         }
2163                 }
2164
2165                 /*
2166                         Set up player
2167                 */
2168
2169                 // Get player name
2170                 char playername[PLAYERNAME_SIZE];
2171                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2172                 {
2173                         playername[i] = data[3+i];
2174                 }
2175                 playername[PLAYERNAME_SIZE-1] = 0;
2176
2177                 if(playername[0]=='\0')
2178                 {
2179                         actionstream<<"Server: Player with an empty name "
2180                                         <<"tried to connect from "<<addr_s<<std::endl;
2181                         SendAccessDenied(m_con, peer_id,
2182                                         L"Empty name");
2183                         return;
2184                 }
2185
2186                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2187                 {
2188                         actionstream<<"Server: Player with an invalid name "
2189                                         <<"tried to connect from "<<addr_s<<std::endl;
2190                         SendAccessDenied(m_con, peer_id,
2191                                         L"Name contains unallowed characters");
2192                         return;
2193                 }
2194
2195                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2196                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2197
2198                 // Get password
2199                 char given_password[PASSWORD_SIZE];
2200                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2201                 {
2202                         // old version - assume blank password
2203                         given_password[0] = 0;
2204                 }
2205                 else
2206                 {
2207                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2208                         {
2209                                 given_password[i] = data[23+i];
2210                         }
2211                         given_password[PASSWORD_SIZE-1] = 0;
2212                 }
2213
2214                 if(!base64_is_valid(given_password)){
2215                         infostream<<"Server: "<<playername
2216                                         <<" supplied invalid password hash"<<std::endl;
2217                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2218                         return;
2219                 }
2220
2221                 std::string checkpwd; // Password hash to check against
2222                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2223
2224                 // If no authentication info exists for user, create it
2225                 if(!has_auth){
2226                         if(!isSingleplayer() &&
2227                                         g_settings->getBool("disallow_empty_password") &&
2228                                         std::string(given_password) == ""){
2229                                 SendAccessDenied(m_con, peer_id, L"Empty passwords are "
2230                                                 L"disallowed. Set a password and try again.");
2231                                 return;
2232                         }
2233                         std::wstring raw_default_password =
2234                                 narrow_to_wide(g_settings->get("default_password"));
2235                         std::string initial_password =
2236                                 translatePassword(playername, raw_default_password);
2237
2238                         // If default_password is empty, allow any initial password
2239                         if (raw_default_password.length() == 0)
2240                                 initial_password = given_password;
2241
2242                         scriptapi_create_auth(m_lua, playername, initial_password);
2243                 }
2244
2245                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2246
2247                 if(!has_auth){
2248                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2249                         return;
2250                 }
2251
2252                 if(given_password != checkpwd){
2253                         infostream<<"Server: peer_id="<<peer_id
2254                                         <<": supplied invalid password for "
2255                                         <<playername<<std::endl;
2256                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2257                         return;
2258                 }
2259
2260                 // Do not allow multiple players in simple singleplayer mode.
2261                 // This isn't a perfect way to do it, but will suffice for now.
2262                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2263                         infostream<<"Server: Not allowing another client to connect in"
2264                                         <<" simple singleplayer mode"<<std::endl;
2265                         SendAccessDenied(m_con, peer_id,
2266                                         L"Running in simple singleplayer mode.");
2267                         return;
2268                 }
2269
2270                 // Enforce user limit.
2271                 // Don't enforce for users that have some admin right
2272                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2273                                 !checkPriv(playername, "server") &&
2274                                 !checkPriv(playername, "ban") &&
2275                                 !checkPriv(playername, "privs") &&
2276                                 !checkPriv(playername, "password") &&
2277                                 playername != g_settings->get("name"))
2278                 {
2279                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2280                                         <<" are already max_users="
2281                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2282                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2283                         return;
2284                 }
2285
2286                 // Get player
2287                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2288
2289                 // If failed, cancel
2290                 if(playersao == NULL)
2291                 {
2292                         errorstream<<"Server: peer_id="<<peer_id
2293                                         <<": failed to emerge player"<<std::endl;
2294                         return;
2295                 }
2296
2297                 /*
2298                         Answer with a TOCLIENT_INIT
2299                 */
2300                 {
2301                         SharedBuffer<u8> reply(2+1+6+8+4);
2302                         writeU16(&reply[0], TOCLIENT_INIT);
2303                         writeU8(&reply[2], deployed);
2304                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2305                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2306                         writeF1000(&reply[2+1+6+8], g_settings->getFloat("dedicated_server_step"));
2307
2308                         // Send as reliable
2309                         m_con.Send(peer_id, 0, reply, true);
2310                 }
2311
2312                 /*
2313                         Send complete position information
2314                 */
2315                 SendMovePlayer(peer_id);
2316
2317                 return;
2318         }
2319
2320         if(command == TOSERVER_INIT2)
2321         {
2322                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2323                                 <<peer_id<<std::endl;
2324
2325                 Player *player = m_env->getPlayer(peer_id);
2326                 if(!player){
2327                         verbosestream<<"Server: TOSERVER_INIT2: "
2328                                         <<"Player not found; ignoring."<<std::endl;
2329                         return;
2330                 }
2331
2332                 RemoteClient *client = getClient(peer_id);
2333                 client->serialization_version =
2334                                 getClient(peer_id)->pending_serialization_version;
2335
2336                 /*
2337                         Send some initialization data
2338                 */
2339
2340                 infostream<<"Server: Sending content to "
2341                                 <<getPlayerName(peer_id)<<std::endl;
2342
2343                 // Send item definitions
2344                 SendItemDef(m_con, peer_id, m_itemdef);
2345
2346                 // Send node definitions
2347                 SendNodeDef(m_con, peer_id, m_nodedef, client->net_proto_version);
2348
2349                 // Send media announcement
2350                 sendMediaAnnouncement(peer_id);
2351
2352                 // Send privileges
2353                 SendPlayerPrivileges(peer_id);
2354
2355                 // Send inventory formspec
2356                 SendPlayerInventoryFormspec(peer_id);
2357
2358                 // Send inventory
2359                 UpdateCrafting(peer_id);
2360                 SendInventory(peer_id);
2361
2362                 // Send HP
2363                 if(g_settings->getBool("enable_damage"))
2364                         SendPlayerHP(peer_id);
2365
2366                 // Send detached inventories
2367                 sendDetachedInventories(peer_id);
2368
2369                 // Show death screen if necessary
2370                 if(player->hp == 0)
2371                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2372
2373                 // Send time of day
2374                 {
2375                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2376                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2377                         m_con.Send(peer_id, 0, data, true);
2378                 }
2379
2380                 // Note things in chat if not in simple singleplayer mode
2381                 if(!m_simple_singleplayer_mode)
2382                 {
2383                         // Send information about server to player in chat
2384                         SendChatMessage(peer_id, getStatusString());
2385
2386                         // Send information about joining in chat
2387                         {
2388                                 std::wstring name = L"unknown";
2389                                 Player *player = m_env->getPlayer(peer_id);
2390                                 if(player != NULL)
2391                                         name = narrow_to_wide(player->getName());
2392
2393                                 std::wstring message;
2394                                 message += L"*** ";
2395                                 message += name;
2396                                 message += L" joined the game.";
2397                                 BroadcastChatMessage(message);
2398                         }
2399                 }
2400
2401                 // Warnings about protocol version can be issued here
2402                 if(getClient(peer_id)->net_proto_version < LATEST_PROTOCOL_VERSION)
2403                 {
2404                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT'S "
2405                                         L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
2406                 }
2407
2408                 /*
2409                         Print out action
2410                 */
2411                 {
2412                         std::ostringstream os(std::ios_base::binary);
2413                         for(core::map<u16, RemoteClient*>::Iterator
2414                                 i = m_clients.getIterator();
2415                                 i.atEnd() == false; i++)
2416                         {
2417                                 RemoteClient *client = i.getNode()->getValue();
2418                                 assert(client->peer_id == i.getNode()->getKey());
2419                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2420                                         continue;
2421                                 // Get player
2422                                 Player *player = m_env->getPlayer(client->peer_id);
2423                                 if(!player)
2424                                         continue;
2425                                 // Get name of player
2426                                 os<<player->getName()<<" ";
2427                         }
2428
2429                         actionstream<<player->getName()<<" joins game. List of players: "
2430                                         <<os.str()<<std::endl;
2431                 }
2432
2433                 return;
2434         }
2435
2436         if(peer_ser_ver == SER_FMT_VER_INVALID)
2437         {
2438                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2439                                 " serialization format invalid or not initialized."
2440                                 " Skipping incoming command="<<command<<std::endl;
2441                 return;
2442         }
2443
2444         Player *player = m_env->getPlayer(peer_id);
2445         if(player == NULL){
2446                 infostream<<"Server::ProcessData(): Cancelling: "
2447                                 "No player for peer_id="<<peer_id
2448                                 <<std::endl;
2449                 return;
2450         }
2451
2452         PlayerSAO *playersao = player->getPlayerSAO();
2453         if(playersao == NULL){
2454                 infostream<<"Server::ProcessData(): Cancelling: "
2455                                 "No player object for peer_id="<<peer_id
2456                                 <<std::endl;
2457                 return;
2458         }
2459
2460         if(command == TOSERVER_PLAYERPOS)
2461         {
2462                 if(datasize < 2+12+12+4+4)
2463                         return;
2464
2465                 u32 start = 0;
2466                 v3s32 ps = readV3S32(&data[start+2]);
2467                 v3s32 ss = readV3S32(&data[start+2+12]);
2468                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2469                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2470                 u32 keyPressed = 0;
2471                 if(datasize >= 2+12+12+4+4+4)
2472                         keyPressed = (u32)readU32(&data[2+12+12+4+4]);
2473                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2474                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2475                 pitch = wrapDegrees(pitch);
2476                 yaw = wrapDegrees(yaw);
2477
2478                 player->setPosition(position);
2479                 player->setSpeed(speed);
2480                 player->setPitch(pitch);
2481                 player->setYaw(yaw);
2482                 player->keyPressed=keyPressed;
2483                 player->control.up = (bool)(keyPressed&1);
2484                 player->control.down = (bool)(keyPressed&2);
2485                 player->control.left = (bool)(keyPressed&4);
2486                 player->control.right = (bool)(keyPressed&8);
2487                 player->control.jump = (bool)(keyPressed&16);
2488                 player->control.aux1 = (bool)(keyPressed&32);
2489                 player->control.sneak = (bool)(keyPressed&64);
2490                 player->control.LMB = (bool)(keyPressed&128);
2491                 player->control.RMB = (bool)(keyPressed&256);
2492
2493                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2494                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2495                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2496         }
2497         else if(command == TOSERVER_GOTBLOCKS)
2498         {
2499                 if(datasize < 2+1)
2500                         return;
2501
2502                 /*
2503                         [0] u16 command
2504                         [2] u8 count
2505                         [3] v3s16 pos_0
2506                         [3+6] v3s16 pos_1
2507                         ...
2508                 */
2509
2510                 u16 count = data[2];
2511                 for(u16 i=0; i<count; i++)
2512                 {
2513                         if((s16)datasize < 2+1+(i+1)*6)
2514                                 throw con::InvalidIncomingDataException
2515                                         ("GOTBLOCKS length is too short");
2516                         v3s16 p = readV3S16(&data[2+1+i*6]);
2517                         /*infostream<<"Server: GOTBLOCKS ("
2518                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2519                         RemoteClient *client = getClient(peer_id);
2520                         client->GotBlock(p);
2521                 }
2522         }
2523         else if(command == TOSERVER_DELETEDBLOCKS)
2524         {
2525                 if(datasize < 2+1)
2526                         return;
2527
2528                 /*
2529                         [0] u16 command
2530                         [2] u8 count
2531                         [3] v3s16 pos_0
2532                         [3+6] v3s16 pos_1
2533                         ...
2534                 */
2535
2536                 u16 count = data[2];
2537                 for(u16 i=0; i<count; i++)
2538                 {
2539                         if((s16)datasize < 2+1+(i+1)*6)
2540                                 throw con::InvalidIncomingDataException
2541                                         ("DELETEDBLOCKS length is too short");
2542                         v3s16 p = readV3S16(&data[2+1+i*6]);
2543                         /*infostream<<"Server: DELETEDBLOCKS ("
2544                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2545                         RemoteClient *client = getClient(peer_id);
2546                         client->SetBlockNotSent(p);
2547                 }
2548         }
2549         else if(command == TOSERVER_CLICK_OBJECT)
2550         {
2551                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2552                 return;
2553         }
2554         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2555         {
2556                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2557                 return;
2558         }
2559         else if(command == TOSERVER_GROUND_ACTION)
2560         {
2561                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2562                 return;
2563
2564         }
2565         else if(command == TOSERVER_RELEASE)
2566         {
2567                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2568                 return;
2569         }
2570         else if(command == TOSERVER_SIGNTEXT)
2571         {
2572                 infostream<<"Server: SIGNTEXT not supported anymore"
2573                                 <<std::endl;
2574                 return;
2575         }
2576         else if(command == TOSERVER_SIGNNODETEXT)
2577         {
2578                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2579                                 <<std::endl;
2580                 return;
2581         }
2582         else if(command == TOSERVER_INVENTORY_ACTION)
2583         {
2584                 // Strip command and create a stream
2585                 std::string datastring((char*)&data[2], datasize-2);
2586                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2587                 std::istringstream is(datastring, std::ios_base::binary);
2588                 // Create an action
2589                 InventoryAction *a = InventoryAction::deSerialize(is);
2590                 if(a == NULL)
2591                 {
2592                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2593                                         <<"InventoryAction::deSerialize() returned NULL"
2594                                         <<std::endl;
2595                         return;
2596                 }
2597
2598                 // If something goes wrong, this player is to blame
2599                 RollbackScopeActor rollback_scope(m_rollback,
2600                                 std::string("player:")+player->getName());
2601
2602                 /*
2603                         Note: Always set inventory not sent, to repair cases
2604                         where the client made a bad prediction.
2605                 */
2606
2607                 /*
2608                         Handle restrictions and special cases of the move action
2609                 */
2610                 if(a->getType() == IACTION_MOVE)
2611                 {
2612                         IMoveAction *ma = (IMoveAction*)a;
2613
2614                         ma->from_inv.applyCurrentPlayer(player->getName());
2615                         ma->to_inv.applyCurrentPlayer(player->getName());
2616
2617                         setInventoryModified(ma->from_inv);
2618                         setInventoryModified(ma->to_inv);
2619
2620                         bool from_inv_is_current_player =
2621                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2622                                 (ma->from_inv.name == player->getName());
2623
2624                         bool to_inv_is_current_player =
2625                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2626                                 (ma->to_inv.name == player->getName());
2627
2628                         /*
2629                                 Disable moving items out of craftpreview
2630                         */
2631                         if(ma->from_list == "craftpreview")
2632                         {
2633                                 infostream<<"Ignoring IMoveAction from "
2634                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2635                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2636                                                 <<" because src is "<<ma->from_list<<std::endl;
2637                                 delete a;
2638                                 return;
2639                         }
2640
2641                         /*
2642                                 Disable moving items into craftresult and craftpreview
2643                         */
2644                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2645                         {
2646                                 infostream<<"Ignoring IMoveAction from "
2647                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2648                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2649                                                 <<" because dst is "<<ma->to_list<<std::endl;
2650                                 delete a;
2651                                 return;
2652                         }
2653
2654                         // Disallow moving items in elsewhere than player's inventory
2655                         // if not allowed to interact
2656                         if(!checkPriv(player->getName(), "interact") &&
2657                                         (!from_inv_is_current_player ||
2658                                         !to_inv_is_current_player))
2659                         {
2660                                 infostream<<"Cannot move outside of player's inventory: "
2661                                                 <<"No interact privilege"<<std::endl;
2662                                 delete a;
2663                                 return;
2664                         }
2665                 }
2666                 /*
2667                         Handle restrictions and special cases of the drop action
2668                 */
2669                 else if(a->getType() == IACTION_DROP)
2670                 {
2671                         IDropAction *da = (IDropAction*)a;
2672
2673                         da->from_inv.applyCurrentPlayer(player->getName());
2674
2675                         setInventoryModified(da->from_inv);
2676
2677                         // Disallow dropping items if not allowed to interact
2678                         if(!checkPriv(player->getName(), "interact"))
2679                         {
2680                                 delete a;
2681                                 return;
2682                         }
2683                 }
2684                 /*
2685                         Handle restrictions and special cases of the craft action
2686                 */
2687                 else if(a->getType() == IACTION_CRAFT)
2688                 {
2689                         ICraftAction *ca = (ICraftAction*)a;
2690
2691                         ca->craft_inv.applyCurrentPlayer(player->getName());
2692
2693                         setInventoryModified(ca->craft_inv);
2694
2695                         //bool craft_inv_is_current_player =
2696                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2697                         //      (ca->craft_inv.name == player->getName());
2698
2699                         // Disallow crafting if not allowed to interact
2700                         if(!checkPriv(player->getName(), "interact"))
2701                         {
2702                                 infostream<<"Cannot craft: "
2703                                                 <<"No interact privilege"<<std::endl;
2704                                 delete a;
2705                                 return;
2706                         }
2707                 }
2708
2709                 // Do the action
2710                 a->apply(this, playersao, this);
2711                 // Eat the action
2712                 delete a;
2713         }
2714         else if(command == TOSERVER_CHAT_MESSAGE)
2715         {
2716                 /*
2717                         u16 command
2718                         u16 length
2719                         wstring message
2720                 */
2721                 u8 buf[6];
2722                 std::string datastring((char*)&data[2], datasize-2);
2723                 std::istringstream is(datastring, std::ios_base::binary);
2724
2725                 // Read stuff
2726                 is.read((char*)buf, 2);
2727                 u16 len = readU16(buf);
2728
2729                 std::wstring message;
2730                 for(u16 i=0; i<len; i++)
2731                 {
2732                         is.read((char*)buf, 2);
2733                         message += (wchar_t)readU16(buf);
2734                 }
2735
2736                 // If something goes wrong, this player is to blame
2737                 RollbackScopeActor rollback_scope(m_rollback,
2738                                 std::string("player:")+player->getName());
2739
2740                 // Get player name of this client
2741                 std::wstring name = narrow_to_wide(player->getName());
2742
2743                 // Run script hook
2744                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2745                                 wide_to_narrow(message));
2746                 // If script ate the message, don't proceed
2747                 if(ate)
2748                         return;
2749
2750                 // Line to send to players
2751                 std::wstring line;
2752                 // Whether to send to the player that sent the line
2753                 bool send_to_sender = false;
2754                 // Whether to send to other players
2755                 bool send_to_others = false;
2756
2757                 // Commands are implemented in Lua, so only catch invalid
2758                 // commands that were not "eaten" and send an error back
2759                 if(message[0] == L'/')
2760                 {
2761                         message = message.substr(1);
2762                         send_to_sender = true;
2763                         if(message.length() == 0)
2764                                 line += L"-!- Empty command";
2765                         else
2766                                 line += L"-!- Invalid command: " + str_split(message, L' ')[0];
2767                 }
2768                 else
2769                 {
2770                         if(checkPriv(player->getName(), "shout")){
2771                                 line += L"<";
2772                                 line += name;
2773                                 line += L"> ";
2774                                 line += message;
2775                                 send_to_others = true;
2776                         } else {
2777                                 line += L"-!- You don't have permission to shout.";
2778                                 send_to_sender = true;
2779                         }
2780                 }
2781
2782                 if(line != L"")
2783                 {
2784                         if(send_to_others)
2785                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2786
2787                         /*
2788                                 Send the message to clients
2789                         */
2790                         for(core::map<u16, RemoteClient*>::Iterator
2791                                 i = m_clients.getIterator();
2792                                 i.atEnd() == false; i++)
2793                         {
2794                                 // Get client and check that it is valid
2795                                 RemoteClient *client = i.getNode()->getValue();
2796                                 assert(client->peer_id == i.getNode()->getKey());
2797                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2798                                         continue;
2799
2800                                 // Filter recipient
2801                                 bool sender_selected = (peer_id == client->peer_id);
2802                                 if(sender_selected == true && send_to_sender == false)
2803                                         continue;
2804                                 if(sender_selected == false && send_to_others == false)
2805                                         continue;
2806
2807                                 SendChatMessage(client->peer_id, line);
2808                         }
2809                 }
2810         }
2811         else if(command == TOSERVER_DAMAGE)
2812         {
2813                 std::string datastring((char*)&data[2], datasize-2);
2814                 std::istringstream is(datastring, std::ios_base::binary);
2815                 u8 damage = readU8(is);
2816
2817                 if(g_settings->getBool("enable_damage"))
2818                 {
2819                         actionstream<<player->getName()<<" damaged by "
2820                                         <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2821                                         <<std::endl;
2822
2823                         playersao->setHP(playersao->getHP() - damage);
2824
2825                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2826                                 DiePlayer(peer_id);
2827
2828                         if(playersao->m_hp_not_sent)
2829                                 SendPlayerHP(peer_id);
2830                 }
2831         }
2832         else if(command == TOSERVER_PASSWORD)
2833         {
2834                 /*
2835                         [0] u16 TOSERVER_PASSWORD
2836                         [2] u8[28] old password
2837                         [30] u8[28] new password
2838                 */
2839
2840                 if(datasize != 2+PASSWORD_SIZE*2)
2841                         return;
2842                 /*char password[PASSWORD_SIZE];
2843                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2844                         password[i] = data[2+i];
2845                 password[PASSWORD_SIZE-1] = 0;*/
2846                 std::string oldpwd;
2847                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2848                 {
2849                         char c = data[2+i];
2850                         if(c == 0)
2851                                 break;
2852                         oldpwd += c;
2853                 }
2854                 std::string newpwd;
2855                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2856                 {
2857                         char c = data[2+PASSWORD_SIZE+i];
2858                         if(c == 0)
2859                                 break;
2860                         newpwd += c;
2861                 }
2862
2863                 if(!base64_is_valid(newpwd)){
2864                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2865                         // Wrong old password supplied!!
2866                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2867                         return;
2868                 }
2869
2870                 infostream<<"Server: Client requests a password change from "
2871                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2872
2873                 std::string playername = player->getName();
2874
2875                 std::string checkpwd;
2876                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2877
2878                 if(oldpwd != checkpwd)
2879                 {
2880                         infostream<<"Server: invalid old password"<<std::endl;
2881                         // Wrong old password supplied!!
2882                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2883                         return;
2884                 }
2885
2886                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2887                 if(success){
2888                         actionstream<<player->getName()<<" changes password"<<std::endl;
2889                         SendChatMessage(peer_id, L"Password change successful.");
2890                 } else {
2891                         actionstream<<player->getName()<<" tries to change password but "
2892                                         <<"it fails"<<std::endl;
2893                         SendChatMessage(peer_id, L"Password change failed or inavailable.");
2894                 }
2895         }
2896         else if(command == TOSERVER_PLAYERITEM)
2897         {
2898                 if (datasize < 2+2)
2899                         return;
2900
2901                 u16 item = readU16(&data[2]);
2902                 playersao->setWieldIndex(item);
2903         }
2904         else if(command == TOSERVER_RESPAWN)
2905         {
2906                 if(player->hp != 0 || !g_settings->getBool("enable_damage"))
2907                         return;
2908
2909                 RespawnPlayer(peer_id);
2910
2911                 actionstream<<player->getName()<<" respawns at "
2912                                 <<PP(player->getPosition()/BS)<<std::endl;
2913
2914                 // ActiveObject is added to environment in AsyncRunStep after
2915                 // the previous addition has been succesfully removed
2916         }
2917         else if(command == TOSERVER_REQUEST_MEDIA) {
2918                 std::string datastring((char*)&data[2], datasize-2);
2919                 std::istringstream is(datastring, std::ios_base::binary);
2920
2921                 core::list<MediaRequest> tosend;
2922                 u16 numfiles = readU16(is);
2923
2924                 infostream<<"Sending "<<numfiles<<" files to "
2925                                 <<getPlayerName(peer_id)<<std::endl;
2926                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2927
2928                 for(int i = 0; i < numfiles; i++) {
2929                         std::string name = deSerializeString(is);
2930                         tosend.push_back(MediaRequest(name));
2931                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2932                                         <<name<<std::endl;
2933                 }
2934
2935                 sendRequestedMedia(peer_id, tosend);
2936
2937                 // Now the client should know about everything
2938                 // (definitions and files)
2939                 getClient(peer_id)->definitions_sent = true;
2940         }
2941         else if(command == TOSERVER_RECEIVED_MEDIA) {
2942                 getClient(peer_id)->definitions_sent = true;
2943         }
2944         else if(command == TOSERVER_INTERACT)
2945         {
2946                 std::string datastring((char*)&data[2], datasize-2);
2947                 std::istringstream is(datastring, std::ios_base::binary);
2948
2949                 /*
2950                         [0] u16 command
2951                         [2] u8 action
2952                         [3] u16 item
2953                         [5] u32 length of the next item
2954                         [9] serialized PointedThing
2955                         actions:
2956                         0: start digging (from undersurface) or use
2957                         1: stop digging (all parameters ignored)
2958                         2: digging completed
2959                         3: place block or item (to abovesurface)
2960                         4: use item
2961                 */
2962                 u8 action = readU8(is);
2963                 u16 item_i = readU16(is);
2964                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2965                 PointedThing pointed;
2966                 pointed.deSerialize(tmp_is);
2967
2968                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2969                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2970
2971                 if(player->hp == 0)
2972                 {
2973                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2974                                 <<" tried to interact, but is dead!"<<std::endl;
2975                         return;
2976                 }
2977
2978                 v3f player_pos = playersao->getLastGoodPosition();
2979
2980                 // Update wielded item
2981                 playersao->setWieldIndex(item_i);
2982
2983                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2984                 v3s16 p_under = pointed.node_undersurface;
2985                 v3s16 p_above = pointed.node_abovesurface;
2986
2987                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2988                 ServerActiveObject *pointed_object = NULL;
2989                 if(pointed.type == POINTEDTHING_OBJECT)
2990                 {
2991                         pointed_object = m_env->getActiveObject(pointed.object_id);
2992                         if(pointed_object == NULL)
2993                         {
2994                                 verbosestream<<"TOSERVER_INTERACT: "
2995                                         "pointed object is NULL"<<std::endl;
2996                                 return;
2997                         }
2998
2999                 }
3000
3001                 v3f pointed_pos_under = player_pos;
3002                 v3f pointed_pos_above = player_pos;
3003                 if(pointed.type == POINTEDTHING_NODE)
3004                 {
3005                         pointed_pos_under = intToFloat(p_under, BS);
3006                         pointed_pos_above = intToFloat(p_above, BS);
3007                 }
3008                 else if(pointed.type == POINTEDTHING_OBJECT)
3009                 {
3010                         pointed_pos_under = pointed_object->getBasePosition();
3011                         pointed_pos_above = pointed_pos_under;
3012                 }
3013
3014                 /*
3015                         Check that target is reasonably close
3016                         (only when digging or placing things)
3017                 */
3018                 if(action == 0 || action == 2 || action == 3)
3019                 {
3020                         float d = player_pos.getDistanceFrom(pointed_pos_under);
3021                         float max_d = BS * 14; // Just some large enough value
3022                         if(d > max_d){
3023                                 actionstream<<"Player "<<player->getName()
3024                                                 <<" tried to access "<<pointed.dump()
3025                                                 <<" from too far: "
3026                                                 <<"d="<<d<<", max_d="<<max_d
3027                                                 <<". ignoring."<<std::endl;
3028                                 // Re-send block to revert change on client-side
3029                                 RemoteClient *client = getClient(peer_id);
3030                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3031                                 client->SetBlockNotSent(blockpos);
3032                                 // Do nothing else
3033                                 return;
3034                         }
3035                 }
3036
3037                 /*
3038                         Make sure the player is allowed to do it
3039                 */
3040                 if(!checkPriv(player->getName(), "interact"))
3041                 {
3042                         actionstream<<player->getName()<<" attempted to interact with "
3043                                         <<pointed.dump()<<" without 'interact' privilege"
3044                                         <<std::endl;
3045                         // Re-send block to revert change on client-side
3046                         RemoteClient *client = getClient(peer_id);
3047                         // Digging completed -> under
3048                         if(action == 2){
3049                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3050                                 client->SetBlockNotSent(blockpos);
3051                         }
3052                         // Placement -> above
3053                         if(action == 3){
3054                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3055                                 client->SetBlockNotSent(blockpos);
3056                         }
3057                         return;
3058                 }
3059
3060                 /*
3061                         If something goes wrong, this player is to blame
3062                 */
3063                 RollbackScopeActor rollback_scope(m_rollback,
3064                                 std::string("player:")+player->getName());
3065
3066                 /*
3067                         0: start digging or punch object
3068                 */
3069                 if(action == 0)
3070                 {
3071                         if(pointed.type == POINTEDTHING_NODE)
3072                         {
3073                                 /*
3074                                         NOTE: This can be used in the future to check if
3075                                         somebody is cheating, by checking the timing.
3076                                 */
3077                                 MapNode n(CONTENT_IGNORE);
3078                                 try
3079                                 {
3080                                         n = m_env->getMap().getNode(p_under);
3081                                 }
3082                                 catch(InvalidPositionException &e)
3083                                 {
3084                                         infostream<<"Server: Not punching: Node not found."
3085                                                         <<" Adding block to emerge queue."
3086                                                         <<std::endl;
3087                                         m_emerge_queue.addBlock(peer_id,
3088                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3089                                 }
3090                                 if(n.getContent() != CONTENT_IGNORE)
3091                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
3092                                 // Cheat prevention
3093                                 playersao->noCheatDigStart(p_under);
3094                         }
3095                         else if(pointed.type == POINTEDTHING_OBJECT)
3096                         {
3097                                 // Skip if object has been removed
3098                                 if(pointed_object->m_removed)
3099                                         return;
3100
3101                                 actionstream<<player->getName()<<" punches object "
3102                                                 <<pointed.object_id<<": "
3103                                                 <<pointed_object->getDescription()<<std::endl;
3104
3105                                 ItemStack punchitem = playersao->getWieldedItem();
3106                                 ToolCapabilities toolcap =
3107                                                 punchitem.getToolCapabilities(m_itemdef);
3108                                 v3f dir = (pointed_object->getBasePosition() -
3109                                                 (player->getPosition() + player->getEyeOffset())
3110                                                         ).normalize();
3111                                 float time_from_last_punch =
3112                                         playersao->resetTimeFromLastPunch();
3113                                 pointed_object->punch(dir, &toolcap, playersao,
3114                                                 time_from_last_punch);
3115                         }
3116
3117                 } // action == 0
3118
3119                 /*
3120                         1: stop digging
3121                 */
3122                 else if(action == 1)
3123                 {
3124                 } // action == 1
3125
3126                 /*
3127                         2: Digging completed
3128                 */
3129                 else if(action == 2)
3130                 {
3131                         // Only digging of nodes
3132                         if(pointed.type == POINTEDTHING_NODE)
3133                         {
3134                                 MapNode n(CONTENT_IGNORE);
3135                                 try
3136                                 {
3137                                         n = m_env->getMap().getNode(p_under);
3138                                 }
3139                                 catch(InvalidPositionException &e)
3140                                 {
3141                                         infostream<<"Server: Not finishing digging: Node not found."
3142                                                         <<" Adding block to emerge queue."
3143                                                         <<std::endl;
3144                                         m_emerge_queue.addBlock(peer_id,
3145                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3146                                 }
3147
3148                                 /* Cheat prevention */
3149                                 bool is_valid_dig = true;
3150                                 if(!isSingleplayer() && !g_settings->getBool("disable_anticheat"))
3151                                 {
3152                                         v3s16 nocheat_p = playersao->getNoCheatDigPos();
3153                                         float nocheat_t = playersao->getNoCheatDigTime();
3154                                         playersao->noCheatDigEnd();
3155                                         // If player didn't start digging this, ignore dig
3156                                         if(nocheat_p != p_under){
3157                                                 infostream<<"Server: NoCheat: "<<player->getName()
3158                                                                 <<" started digging "
3159                                                                 <<PP(nocheat_p)<<" and completed digging "
3160                                                                 <<PP(p_under)<<"; not digging."<<std::endl;
3161                                                 is_valid_dig = false;
3162                                         }
3163                                         // Get player's wielded item
3164                                         ItemStack playeritem;
3165                                         InventoryList *mlist = playersao->getInventory()->getList("main");
3166                                         if(mlist != NULL)
3167                                                 playeritem = mlist->getItem(playersao->getWieldIndex());
3168                                         ToolCapabilities playeritem_toolcap =
3169                                                         playeritem.getToolCapabilities(m_itemdef);
3170                                         // Get diggability and expected digging time
3171                                         DigParams params = getDigParams(m_nodedef->get(n).groups,
3172                                                         &playeritem_toolcap);
3173                                         // If can't dig, try hand
3174                                         if(!params.diggable){
3175                                                 const ItemDefinition &hand = m_itemdef->get("");
3176                                                 const ToolCapabilities *tp = hand.tool_capabilities;
3177                                                 if(tp)
3178                                                         params = getDigParams(m_nodedef->get(n).groups, tp);
3179                                         }
3180                                         // If can't dig, ignore dig
3181                                         if(!params.diggable){
3182                                                 infostream<<"Server: NoCheat: "<<player->getName()
3183                                                                 <<" completed digging "<<PP(p_under)
3184                                                                 <<", which is not diggable with tool. not digging."
3185                                                                 <<std::endl;
3186                                                 is_valid_dig = false;
3187                                         }
3188                                         // If time is considerably too short, ignore dig
3189                                         // Check time only for medium and slow timed digs
3190                                         if(params.diggable && params.time > 0.3 && nocheat_t < 0.5 * params.time){
3191                                                 infostream<<"Server: NoCheat: "<<player->getName()
3192                                                                 <<" completed digging "
3193                                                                 <<PP(p_under)<<" in "<<nocheat_t<<"s; expected "
3194                                                                 <<params.time<<"s; not digging."<<std::endl;
3195                                                 is_valid_dig = false;
3196                                         }
3197                                 }
3198
3199                                 /* Actually dig node */
3200
3201                                 if(is_valid_dig && n.getContent() != CONTENT_IGNORE)
3202                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3203
3204                                 // Send unusual result (that is, node not being removed)
3205                                 if(m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3206                                 {
3207                                         // Re-send block to revert change on client-side
3208                                         RemoteClient *client = getClient(peer_id);
3209                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3210                                         client->SetBlockNotSent(blockpos);
3211                                 }
3212                         }
3213                 } // action == 2
3214
3215                 /*
3216                         3: place block or right-click object
3217                 */
3218                 else if(action == 3)
3219                 {
3220                         ItemStack item = playersao->getWieldedItem();
3221
3222                         // Reset build time counter
3223                         if(pointed.type == POINTEDTHING_NODE &&
3224                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3225                                 getClient(peer_id)->m_time_from_building = 0.0;
3226
3227                         if(pointed.type == POINTEDTHING_OBJECT)
3228                         {
3229                                 // Right click object
3230
3231                                 // Skip if object has been removed
3232                                 if(pointed_object->m_removed)
3233                                         return;
3234
3235                                 actionstream<<player->getName()<<" right-clicks object "
3236                                                 <<pointed.object_id<<": "
3237                                                 <<pointed_object->getDescription()<<std::endl;
3238
3239                                 // Do stuff
3240                                 pointed_object->rightClick(playersao);
3241                         }
3242                         else if(scriptapi_item_on_place(m_lua,
3243                                         item, playersao, pointed))
3244                         {
3245                                 // Placement was handled in lua
3246
3247                                 // Apply returned ItemStack
3248                                 playersao->setWieldedItem(item);
3249                         }
3250
3251                         // If item has node placement prediction, always send the above
3252                         // node to make sure the client knows what exactly happened
3253                         if(item.getDefinition(m_itemdef).node_placement_prediction != ""){
3254                                 RemoteClient *client = getClient(peer_id);
3255                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_above, BS));
3256                                 client->SetBlockNotSent(blockpos);
3257                         }
3258                 } // action == 3
3259
3260                 /*
3261                         4: use
3262                 */
3263                 else if(action == 4)
3264                 {
3265                         ItemStack item = playersao->getWieldedItem();
3266
3267                         actionstream<<player->getName()<<" uses "<<item.name
3268                                         <<", pointing at "<<pointed.dump()<<std::endl;
3269
3270                         if(scriptapi_item_on_use(m_lua,
3271                                         item, playersao, pointed))
3272                         {
3273                                 // Apply returned ItemStack
3274                                 playersao->setWieldedItem(item);
3275                         }
3276
3277                 } // action == 4
3278
3279
3280                 /*
3281                         Catch invalid actions
3282                 */
3283                 else
3284                 {
3285                         infostream<<"WARNING: Server: Invalid action "
3286                                         <<action<<std::endl;
3287                 }
3288         }
3289         else if(command == TOSERVER_REMOVED_SOUNDS)
3290         {
3291                 std::string datastring((char*)&data[2], datasize-2);
3292                 std::istringstream is(datastring, std::ios_base::binary);
3293
3294                 int num = readU16(is);
3295                 for(int k=0; k<num; k++){
3296                         s32 id = readS32(is);
3297                         std::map<s32, ServerPlayingSound>::iterator i =
3298                                         m_playing_sounds.find(id);
3299                         if(i == m_playing_sounds.end())
3300                                 continue;
3301                         ServerPlayingSound &psound = i->second;
3302                         psound.clients.erase(peer_id);
3303                         if(psound.clients.size() == 0)
3304                                 m_playing_sounds.erase(i++);
3305                 }
3306         }
3307         else if(command == TOSERVER_NODEMETA_FIELDS)
3308         {
3309                 std::string datastring((char*)&data[2], datasize-2);
3310                 std::istringstream is(datastring, std::ios_base::binary);
3311
3312                 v3s16 p = readV3S16(is);
3313                 std::string formname = deSerializeString(is);
3314                 int num = readU16(is);
3315                 std::map<std::string, std::string> fields;
3316                 for(int k=0; k<num; k++){
3317                         std::string fieldname = deSerializeString(is);
3318                         std::string fieldvalue = deSerializeLongString(is);
3319                         fields[fieldname] = fieldvalue;
3320                 }
3321
3322                 // If something goes wrong, this player is to blame
3323                 RollbackScopeActor rollback_scope(m_rollback,
3324                                 std::string("player:")+player->getName());
3325
3326                 // Check the target node for rollback data; leave others unnoticed
3327                 RollbackNode rn_old(&m_env->getMap(), p, this);
3328
3329                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3330                                 playersao);
3331
3332                 // Report rollback data
3333                 RollbackNode rn_new(&m_env->getMap(), p, this);
3334                 if(rollback() && rn_new != rn_old){
3335                         RollbackAction action;
3336                         action.setSetNode(p, rn_old, rn_new);
3337                         rollback()->reportAction(action);
3338                 }
3339         }
3340         else if(command == TOSERVER_INVENTORY_FIELDS)
3341         {
3342                 std::string datastring((char*)&data[2], datasize-2);
3343                 std::istringstream is(datastring, std::ios_base::binary);
3344
3345                 std::string formname = deSerializeString(is);
3346                 int num = readU16(is);
3347                 std::map<std::string, std::string> fields;
3348                 for(int k=0; k<num; k++){
3349                         std::string fieldname = deSerializeString(is);
3350                         std::string fieldvalue = deSerializeLongString(is);
3351                         fields[fieldname] = fieldvalue;
3352                 }
3353
3354                 scriptapi_on_player_receive_fields(m_lua, playersao, formname, fields);
3355         }
3356         else
3357         {
3358                 infostream<<"Server::ProcessData(): Ignoring "
3359                                 "unknown command "<<command<<std::endl;
3360         }
3361
3362         } //try
3363         catch(SendFailedException &e)
3364         {
3365                 errorstream<<"Server::ProcessData(): SendFailedException: "
3366                                 <<"what="<<e.what()
3367                                 <<std::endl;
3368         }
3369 }
3370
3371 void Server::onMapEditEvent(MapEditEvent *event)
3372 {
3373         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3374         if(m_ignore_map_edit_events)
3375                 return;
3376         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3377                 return;
3378         MapEditEvent *e = event->clone();
3379         m_unsent_map_edit_queue.push_back(e);
3380 }
3381
3382 Inventory* Server::getInventory(const InventoryLocation &loc)
3383 {
3384         switch(loc.type){
3385         case InventoryLocation::UNDEFINED:
3386         {}
3387         break;
3388         case InventoryLocation::CURRENT_PLAYER:
3389         {}
3390         break;
3391         case InventoryLocation::PLAYER:
3392         {
3393                 Player *player = m_env->getPlayer(loc.name.c_str());
3394                 if(!player)
3395                         return NULL;
3396                 PlayerSAO *playersao = player->getPlayerSAO();
3397                 if(!playersao)
3398                         return NULL;
3399                 return playersao->getInventory();
3400         }
3401         break;
3402         case InventoryLocation::NODEMETA:
3403         {
3404                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3405                 if(!meta)
3406                         return NULL;
3407                 return meta->getInventory();
3408         }
3409         break;
3410         case InventoryLocation::DETACHED:
3411         {
3412                 if(m_detached_inventories.count(loc.name) == 0)
3413                         return NULL;
3414                 return m_detached_inventories[loc.name];
3415         }
3416         break;
3417         default:
3418                 assert(0);
3419         }
3420         return NULL;
3421 }
3422 void Server::setInventoryModified(const InventoryLocation &loc)
3423 {
3424         switch(loc.type){
3425         case InventoryLocation::UNDEFINED:
3426         {}
3427         break;
3428         case InventoryLocation::PLAYER:
3429         {
3430                 Player *player = m_env->getPlayer(loc.name.c_str());
3431                 if(!player)
3432                         return;
3433                 PlayerSAO *playersao = player->getPlayerSAO();
3434                 if(!playersao)
3435                         return;
3436                 playersao->m_inventory_not_sent = true;
3437                 playersao->m_wielded_item_not_sent = true;
3438         }
3439         break;
3440         case InventoryLocation::NODEMETA:
3441         {
3442                 v3s16 blockpos = getNodeBlockPos(loc.p);
3443
3444                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3445                 if(block)
3446                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3447
3448                 setBlockNotSent(blockpos);
3449         }
3450         break;
3451         case InventoryLocation::DETACHED:
3452         {
3453                 sendDetachedInventoryToAll(loc.name);
3454         }
3455         break;
3456         default:
3457                 assert(0);
3458         }
3459 }
3460
3461 core::list<PlayerInfo> Server::getPlayerInfo()
3462 {
3463         DSTACK(__FUNCTION_NAME);
3464         JMutexAutoLock envlock(m_env_mutex);
3465         JMutexAutoLock conlock(m_con_mutex);
3466
3467         core::list<PlayerInfo> list;
3468
3469         core::list<Player*> players = m_env->getPlayers();
3470
3471         core::list<Player*>::Iterator i;
3472         for(i = players.begin();
3473                         i != players.end(); i++)
3474         {
3475                 PlayerInfo info;
3476
3477                 Player *player = *i;
3478
3479                 try{
3480                         // Copy info from connection to info struct
3481                         info.id = player->peer_id;
3482                         info.address = m_con.GetPeerAddress(player->peer_id);
3483                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3484                 }
3485                 catch(con::PeerNotFoundException &e)
3486                 {
3487                         // Set dummy peer info
3488                         info.id = 0;
3489                         info.address = Address(0,0,0,0,0);
3490                         info.avg_rtt = 0.0;
3491                 }
3492
3493                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3494                 info.position = player->getPosition();
3495
3496                 list.push_back(info);
3497         }
3498
3499         return list;
3500 }
3501
3502
3503 void Server::peerAdded(con::Peer *peer)
3504 {
3505         DSTACK(__FUNCTION_NAME);
3506         verbosestream<<"Server::peerAdded(): peer->id="
3507                         <<peer->id<<std::endl;
3508
3509         PeerChange c;
3510         c.type = PEER_ADDED;
3511         c.peer_id = peer->id;
3512         c.timeout = false;
3513         m_peer_change_queue.push_back(c);
3514 }
3515
3516 void Server::deletingPeer(con::Peer *peer, bool timeout)
3517 {
3518         DSTACK(__FUNCTION_NAME);
3519         verbosestream<<"Server::deletingPeer(): peer->id="
3520                         <<peer->id<<", timeout="<<timeout<<std::endl;
3521
3522         PeerChange c;
3523         c.type = PEER_REMOVED;
3524         c.peer_id = peer->id;
3525         c.timeout = timeout;
3526         m_peer_change_queue.push_back(c);
3527 }
3528
3529 /*
3530         Static send methods
3531 */
3532
3533 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3534 {
3535         DSTACK(__FUNCTION_NAME);
3536         std::ostringstream os(std::ios_base::binary);
3537
3538         writeU16(os, TOCLIENT_HP);
3539         writeU8(os, hp);
3540
3541         // Make data buffer
3542         std::string s = os.str();
3543         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3544         // Send as reliable
3545         con.Send(peer_id, 0, data, true);
3546 }
3547
3548 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3549                 const std::wstring &reason)
3550 {
3551         DSTACK(__FUNCTION_NAME);
3552         std::ostringstream os(std::ios_base::binary);
3553
3554         writeU16(os, TOCLIENT_ACCESS_DENIED);
3555         os<<serializeWideString(reason);
3556
3557         // Make data buffer
3558         std::string s = os.str();
3559         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3560         // Send as reliable
3561         con.Send(peer_id, 0, data, true);
3562 }
3563
3564 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3565                 bool set_camera_point_target, v3f camera_point_target)
3566 {
3567         DSTACK(__FUNCTION_NAME);
3568         std::ostringstream os(std::ios_base::binary);
3569
3570         writeU16(os, TOCLIENT_DEATHSCREEN);
3571         writeU8(os, set_camera_point_target);
3572         writeV3F1000(os, camera_point_target);
3573
3574         // Make data buffer
3575         std::string s = os.str();
3576         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3577         // Send as reliable
3578         con.Send(peer_id, 0, data, true);
3579 }
3580
3581 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3582                 IItemDefManager *itemdef)
3583 {
3584         DSTACK(__FUNCTION_NAME);
3585         std::ostringstream os(std::ios_base::binary);
3586
3587         /*
3588                 u16 command
3589                 u32 length of the next item
3590                 zlib-compressed serialized ItemDefManager
3591         */
3592         writeU16(os, TOCLIENT_ITEMDEF);
3593         std::ostringstream tmp_os(std::ios::binary);
3594         itemdef->serialize(tmp_os);
3595         std::ostringstream tmp_os2(std::ios::binary);
3596         compressZlib(tmp_os.str(), tmp_os2);
3597         os<<serializeLongString(tmp_os2.str());
3598
3599         // Make data buffer
3600         std::string s = os.str();
3601         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3602                         <<"): size="<<s.size()<<std::endl;
3603         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3604         // Send as reliable
3605         con.Send(peer_id, 0, data, true);
3606 }
3607
3608 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3609                 INodeDefManager *nodedef, u16 protocol_version)
3610 {
3611         DSTACK(__FUNCTION_NAME);
3612         std::ostringstream os(std::ios_base::binary);
3613
3614         /*
3615                 u16 command
3616                 u32 length of the next item
3617                 zlib-compressed serialized NodeDefManager
3618         */
3619         writeU16(os, TOCLIENT_NODEDEF);
3620         std::ostringstream tmp_os(std::ios::binary);
3621         nodedef->serialize(tmp_os, protocol_version);
3622         std::ostringstream tmp_os2(std::ios::binary);
3623         compressZlib(tmp_os.str(), tmp_os2);
3624         os<<serializeLongString(tmp_os2.str());
3625
3626         // Make data buffer
3627         std::string s = os.str();
3628         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3629                         <<"): size="<<s.size()<<std::endl;
3630         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3631         // Send as reliable
3632         con.Send(peer_id, 0, data, true);
3633 }
3634
3635 /*
3636         Non-static send methods
3637 */
3638
3639 void Server::SendInventory(u16 peer_id)
3640 {
3641         DSTACK(__FUNCTION_NAME);
3642
3643         PlayerSAO *playersao = getPlayerSAO(peer_id);
3644         assert(playersao);
3645
3646         playersao->m_inventory_not_sent = false;
3647
3648         /*
3649                 Serialize it
3650         */
3651
3652         std::ostringstream os;
3653         playersao->getInventory()->serialize(os);
3654
3655         std::string s = os.str();
3656
3657         SharedBuffer<u8> data(s.size()+2);
3658         writeU16(&data[0], TOCLIENT_INVENTORY);
3659         memcpy(&data[2], s.c_str(), s.size());
3660
3661         // Send as reliable
3662         m_con.Send(peer_id, 0, data, true);
3663 }
3664
3665 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3666 {
3667         DSTACK(__FUNCTION_NAME);
3668
3669         std::ostringstream os(std::ios_base::binary);
3670         u8 buf[12];
3671
3672         // Write command
3673         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3674         os.write((char*)buf, 2);
3675
3676         // Write length
3677         writeU16(buf, message.size());
3678         os.write((char*)buf, 2);
3679
3680         // Write string
3681         for(u32 i=0; i<message.size(); i++)
3682         {
3683                 u16 w = message[i];
3684                 writeU16(buf, w);
3685                 os.write((char*)buf, 2);
3686         }
3687
3688         // Make data buffer
3689         std::string s = os.str();
3690         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3691         // Send as reliable
3692         m_con.Send(peer_id, 0, data, true);
3693 }
3694 void Server::SendShowFormspecMessage(u16 peer_id, const std::string formspec, const std::string formname)
3695 {
3696         DSTACK(__FUNCTION_NAME);
3697
3698         std::ostringstream os(std::ios_base::binary);
3699         u8 buf[12];
3700
3701         // Write command
3702         writeU16(buf, TOCLIENT_SHOW_FORMSPEC);
3703         os.write((char*)buf, 2);
3704         os<<serializeLongString(formspec);
3705         os<<serializeString(formname);
3706
3707         // Make data buffer
3708         std::string s = os.str();
3709         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3710         // Send as reliable
3711         m_con.Send(peer_id, 0, data, true);
3712 }
3713
3714 void Server::BroadcastChatMessage(const std::wstring &message)
3715 {
3716         for(core::map<u16, RemoteClient*>::Iterator
3717                 i = m_clients.getIterator();
3718                 i.atEnd() == false; i++)
3719         {
3720                 // Get client and check that it is valid
3721                 RemoteClient *client = i.getNode()->getValue();
3722                 assert(client->peer_id == i.getNode()->getKey());
3723                 if(client->serialization_version == SER_FMT_VER_INVALID)
3724                         continue;
3725
3726                 SendChatMessage(client->peer_id, message);
3727         }
3728 }
3729
3730 void Server::SendPlayerHP(u16 peer_id)
3731 {
3732         DSTACK(__FUNCTION_NAME);
3733         PlayerSAO *playersao = getPlayerSAO(peer_id);
3734         assert(playersao);
3735         playersao->m_hp_not_sent = false;
3736         SendHP(m_con, peer_id, playersao->getHP());
3737 }
3738
3739 void Server::SendMovePlayer(u16 peer_id)
3740 {
3741         DSTACK(__FUNCTION_NAME);
3742         Player *player = m_env->getPlayer(peer_id);
3743         assert(player);
3744
3745         std::ostringstream os(std::ios_base::binary);
3746         writeU16(os, TOCLIENT_MOVE_PLAYER);
3747         writeV3F1000(os, player->getPosition());
3748         writeF1000(os, player->getPitch());
3749         writeF1000(os, player->getYaw());
3750
3751         {
3752                 v3f pos = player->getPosition();
3753                 f32 pitch = player->getPitch();
3754                 f32 yaw = player->getYaw();
3755                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3756                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3757                                 <<" pitch="<<pitch
3758                                 <<" yaw="<<yaw
3759                                 <<std::endl;
3760         }
3761
3762         // Make data buffer
3763         std::string s = os.str();
3764         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3765         // Send as reliable
3766         m_con.Send(peer_id, 0, data, true);
3767 }
3768
3769 void Server::SendPlayerPrivileges(u16 peer_id)
3770 {
3771         Player *player = m_env->getPlayer(peer_id);
3772         assert(player);
3773         if(player->peer_id == PEER_ID_INEXISTENT)
3774                 return;
3775
3776         std::set<std::string> privs;
3777         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3778
3779         std::ostringstream os(std::ios_base::binary);
3780         writeU16(os, TOCLIENT_PRIVILEGES);
3781         writeU16(os, privs.size());
3782         for(std::set<std::string>::const_iterator i = privs.begin();
3783                         i != privs.end(); i++){
3784                 os<<serializeString(*i);
3785         }
3786
3787         // Make data buffer
3788         std::string s = os.str();
3789         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3790         // Send as reliable
3791         m_con.Send(peer_id, 0, data, true);
3792 }
3793
3794 void Server::SendPlayerInventoryFormspec(u16 peer_id)
3795 {
3796         Player *player = m_env->getPlayer(peer_id);
3797         assert(player);
3798         if(player->peer_id == PEER_ID_INEXISTENT)
3799                 return;
3800
3801         std::ostringstream os(std::ios_base::binary);
3802         writeU16(os, TOCLIENT_INVENTORY_FORMSPEC);
3803         os<<serializeLongString(player->inventory_formspec);
3804
3805         // Make data buffer
3806         std::string s = os.str();
3807         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3808         // Send as reliable
3809         m_con.Send(peer_id, 0, data, true);
3810 }
3811
3812 s32 Server::playSound(const SimpleSoundSpec &spec,
3813                 const ServerSoundParams &params)
3814 {
3815         // Find out initial position of sound
3816         bool pos_exists = false;
3817         v3f pos = params.getPos(m_env, &pos_exists);
3818         // If position is not found while it should be, cancel sound
3819         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3820                 return -1;
3821         // Filter destination clients
3822         std::set<RemoteClient*> dst_clients;
3823         if(params.to_player != "")
3824         {
3825                 Player *player = m_env->getPlayer(params.to_player.c_str());
3826                 if(!player){
3827                         infostream<<"Server::playSound: Player \""<<params.to_player
3828                                         <<"\" not found"<<std::endl;
3829                         return -1;
3830                 }
3831                 if(player->peer_id == PEER_ID_INEXISTENT){
3832                         infostream<<"Server::playSound: Player \""<<params.to_player
3833                                         <<"\" not connected"<<std::endl;
3834                         return -1;
3835                 }
3836                 RemoteClient *client = getClient(player->peer_id);
3837                 dst_clients.insert(client);
3838         }
3839         else
3840         {
3841                 for(core::map<u16, RemoteClient*>::Iterator
3842                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3843                 {
3844                         RemoteClient *client = i.getNode()->getValue();
3845                         Player *player = m_env->getPlayer(client->peer_id);
3846                         if(!player)
3847                                 continue;
3848                         if(pos_exists){
3849                                 if(player->getPosition().getDistanceFrom(pos) >
3850                                                 params.max_hear_distance)
3851                                         continue;
3852                         }
3853                         dst_clients.insert(client);
3854                 }
3855         }
3856         if(dst_clients.size() == 0)
3857                 return -1;
3858         // Create the sound
3859         s32 id = m_next_sound_id++;
3860         // The sound will exist as a reference in m_playing_sounds
3861         m_playing_sounds[id] = ServerPlayingSound();
3862         ServerPlayingSound &psound = m_playing_sounds[id];
3863         psound.params = params;
3864         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3865                         i != dst_clients.end(); i++)
3866                 psound.clients.insert((*i)->peer_id);
3867         // Create packet
3868         std::ostringstream os(std::ios_base::binary);
3869         writeU16(os, TOCLIENT_PLAY_SOUND);
3870         writeS32(os, id);
3871         os<<serializeString(spec.name);
3872         writeF1000(os, spec.gain * params.gain);
3873         writeU8(os, params.type);
3874         writeV3F1000(os, pos);
3875         writeU16(os, params.object);
3876         writeU8(os, params.loop);
3877         // Make data buffer
3878         std::string s = os.str();
3879         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3880         // Send
3881         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3882                         i != dst_clients.end(); i++){
3883                 // Send as reliable
3884                 m_con.Send((*i)->peer_id, 0, data, true);
3885         }
3886         return id;
3887 }
3888 void Server::stopSound(s32 handle)
3889 {
3890         // Get sound reference
3891         std::map<s32, ServerPlayingSound>::iterator i =
3892                         m_playing_sounds.find(handle);
3893         if(i == m_playing_sounds.end())
3894                 return;
3895         ServerPlayingSound &psound = i->second;
3896         // Create packet
3897         std::ostringstream os(std::ios_base::binary);
3898         writeU16(os, TOCLIENT_STOP_SOUND);
3899         writeS32(os, handle);
3900         // Make data buffer
3901         std::string s = os.str();
3902         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3903         // Send
3904         for(std::set<u16>::iterator i = psound.clients.begin();
3905                         i != psound.clients.end(); i++){
3906                 // Send as reliable
3907                 m_con.Send(*i, 0, data, true);
3908         }
3909         // Remove sound reference
3910         m_playing_sounds.erase(i);
3911 }
3912
3913 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3914         core::list<u16> *far_players, float far_d_nodes)
3915 {
3916         float maxd = far_d_nodes*BS;
3917         v3f p_f = intToFloat(p, BS);
3918
3919         // Create packet
3920         u32 replysize = 8;
3921         SharedBuffer<u8> reply(replysize);
3922         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3923         writeS16(&reply[2], p.X);
3924         writeS16(&reply[4], p.Y);
3925         writeS16(&reply[6], p.Z);
3926
3927         for(core::map<u16, RemoteClient*>::Iterator
3928                 i = m_clients.getIterator();
3929                 i.atEnd() == false; i++)
3930         {
3931                 // Get client and check that it is valid
3932                 RemoteClient *client = i.getNode()->getValue();
3933                 assert(client->peer_id == i.getNode()->getKey());
3934                 if(client->serialization_version == SER_FMT_VER_INVALID)
3935                         continue;
3936
3937                 // Don't send if it's the same one
3938                 if(client->peer_id == ignore_id)
3939                         continue;
3940
3941                 if(far_players)
3942                 {
3943                         // Get player
3944                         Player *player = m_env->getPlayer(client->peer_id);
3945                         if(player)
3946                         {
3947                                 // If player is far away, only set modified blocks not sent
3948                                 v3f player_pos = player->getPosition();
3949                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3950                                 {
3951                                         far_players->push_back(client->peer_id);
3952                                         continue;
3953                                 }
3954                         }
3955                 }
3956
3957                 // Send as reliable
3958                 m_con.Send(client->peer_id, 0, reply, true);
3959         }
3960 }
3961
3962 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3963                 core::list<u16> *far_players, float far_d_nodes)
3964 {
3965         float maxd = far_d_nodes*BS;
3966         v3f p_f = intToFloat(p, BS);
3967
3968         for(core::map<u16, RemoteClient*>::Iterator
3969                 i = m_clients.getIterator();
3970                 i.atEnd() == false; i++)
3971         {
3972                 // Get client and check that it is valid
3973                 RemoteClient *client = i.getNode()->getValue();
3974                 assert(client->peer_id == i.getNode()->getKey());
3975                 if(client->serialization_version == SER_FMT_VER_INVALID)
3976                         continue;
3977
3978                 // Don't send if it's the same one
3979                 if(client->peer_id == ignore_id)
3980                         continue;
3981
3982                 if(far_players)
3983                 {
3984                         // Get player
3985                         Player *player = m_env->getPlayer(client->peer_id);
3986                         if(player)
3987                         {
3988                                 // If player is far away, only set modified blocks not sent
3989                                 v3f player_pos = player->getPosition();
3990                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3991                                 {
3992                                         far_players->push_back(client->peer_id);
3993                                         continue;
3994                                 }
3995                         }
3996                 }
3997
3998                 // Create packet
3999                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
4000                 SharedBuffer<u8> reply(replysize);
4001                 writeU16(&reply[0], TOCLIENT_ADDNODE);
4002                 writeS16(&reply[2], p.X);
4003                 writeS16(&reply[4], p.Y);
4004                 writeS16(&reply[6], p.Z);
4005                 n.serialize(&reply[8], client->serialization_version);
4006
4007                 // Send as reliable
4008                 m_con.Send(client->peer_id, 0, reply, true);
4009         }
4010 }
4011
4012 void Server::setBlockNotSent(v3s16 p)
4013 {
4014         for(core::map<u16, RemoteClient*>::Iterator
4015                 i = m_clients.getIterator();
4016                 i.atEnd()==false; i++)
4017         {
4018                 RemoteClient *client = i.getNode()->getValue();
4019                 client->SetBlockNotSent(p);
4020         }
4021 }
4022
4023 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
4024 {
4025         DSTACK(__FUNCTION_NAME);
4026
4027         v3s16 p = block->getPos();
4028
4029 #if 0
4030         // Analyze it a bit
4031         bool completely_air = true;
4032         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
4033         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
4034         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
4035         {
4036                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
4037                 {
4038                         completely_air = false;
4039                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
4040                 }
4041         }
4042
4043         // Print result
4044         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
4045         if(completely_air)
4046                 infostream<<"[completely air] ";
4047         infostream<<std::endl;
4048 #endif
4049
4050         /*
4051                 Create a packet with the block in the right format
4052         */
4053
4054         std::ostringstream os(std::ios_base::binary);
4055         block->serialize(os, ver, false);
4056         std::string s = os.str();
4057         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
4058
4059         u32 replysize = 8 + blockdata.getSize();
4060         SharedBuffer<u8> reply(replysize);
4061         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
4062         writeS16(&reply[2], p.X);
4063         writeS16(&reply[4], p.Y);
4064         writeS16(&reply[6], p.Z);
4065         memcpy(&reply[8], *blockdata, blockdata.getSize());
4066
4067         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
4068                         <<":  \tpacket size: "<<replysize<<std::endl;*/
4069
4070         /*
4071                 Send packet
4072         */
4073         m_con.Send(peer_id, 1, reply, true);
4074 }
4075
4076 void Server::SendBlocks(float dtime)
4077 {
4078         DSTACK(__FUNCTION_NAME);
4079
4080         JMutexAutoLock envlock(m_env_mutex);
4081         JMutexAutoLock conlock(m_con_mutex);
4082
4083         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
4084
4085         core::array<PrioritySortedBlockTransfer> queue;
4086
4087         s32 total_sending = 0;
4088
4089         {
4090                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
4091
4092                 for(core::map<u16, RemoteClient*>::Iterator
4093                         i = m_clients.getIterator();
4094                         i.atEnd() == false; i++)
4095                 {
4096                         RemoteClient *client = i.getNode()->getValue();
4097                         assert(client->peer_id == i.getNode()->getKey());
4098
4099                         // If definitions and textures have not been sent, don't
4100                         // send MapBlocks either
4101                         if(!client->definitions_sent)
4102                                 continue;
4103
4104                         total_sending += client->SendingCount();
4105
4106                         if(client->serialization_version == SER_FMT_VER_INVALID)
4107                                 continue;
4108
4109                         client->GetNextBlocks(this, dtime, queue);
4110                 }
4111         }
4112
4113         // Sort.
4114         // Lowest priority number comes first.
4115         // Lowest is most important.
4116         queue.sort();
4117
4118         for(u32 i=0; i<queue.size(); i++)
4119         {
4120                 //TODO: Calculate limit dynamically
4121                 if(total_sending >= g_settings->getS32
4122                                 ("max_simultaneous_block_sends_server_total"))
4123                         break;
4124
4125                 PrioritySortedBlockTransfer q = queue[i];
4126
4127                 MapBlock *block = NULL;
4128                 try
4129                 {
4130                         block = m_env->getMap().getBlockNoCreate(q.pos);
4131                 }
4132                 catch(InvalidPositionException &e)
4133                 {
4134                         continue;
4135                 }
4136
4137                 RemoteClient *client = getClient(q.peer_id);
4138
4139                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
4140
4141                 client->SentBlock(q.pos);
4142
4143                 total_sending++;
4144         }
4145 }
4146
4147 void Server::fillMediaCache()
4148 {
4149         DSTACK(__FUNCTION_NAME);
4150
4151         infostream<<"Server: Calculating media file checksums"<<std::endl;
4152
4153         // Collect all media file paths
4154         std::list<std::string> paths;
4155         for(std::vector<ModSpec>::iterator i = m_mods.begin();
4156                         i != m_mods.end(); i++){
4157                 const ModSpec &mod = *i;
4158                 paths.push_back(mod.path + DIR_DELIM + "textures");
4159                 paths.push_back(mod.path + DIR_DELIM + "sounds");
4160                 paths.push_back(mod.path + DIR_DELIM + "media");
4161                 paths.push_back(mod.path + DIR_DELIM + "models");
4162         }
4163         std::string path_all = "textures";
4164         paths.push_back(path_all + DIR_DELIM + "all");
4165
4166         // Collect media file information from paths into cache
4167         for(std::list<std::string>::iterator i = paths.begin();
4168                         i != paths.end(); i++)
4169         {
4170                 std::string mediapath = *i;
4171                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
4172                 for(u32 j=0; j<dirlist.size(); j++){
4173                         if(dirlist[j].dir) // Ignode dirs
4174                                 continue;
4175                         std::string filename = dirlist[j].name;
4176                         // If name contains illegal characters, ignore the file
4177                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
4178                                 infostream<<"Server: ignoring illegal file name: \""
4179                                                 <<filename<<"\""<<std::endl;
4180                                 continue;
4181                         }
4182                         // If name is not in a supported format, ignore it
4183                         const char *supported_ext[] = {
4184                                 ".png", ".jpg", ".bmp", ".tga",
4185                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
4186                                 ".ogg",
4187                                 ".x", ".b3d", ".md2", ".obj",
4188                                 NULL
4189                         };
4190                         if(removeStringEnd(filename, supported_ext) == ""){
4191                                 infostream<<"Server: ignoring unsupported file extension: \""
4192                                                 <<filename<<"\""<<std::endl;
4193                                 continue;
4194                         }
4195                         // Ok, attempt to load the file and add to cache
4196                         std::string filepath = mediapath + DIR_DELIM + filename;
4197                         // Read data
4198                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
4199                         if(fis.good() == false){
4200                                 errorstream<<"Server::fillMediaCache(): Could not open \""
4201                                                 <<filename<<"\" for reading"<<std::endl;
4202                                 continue;
4203                         }
4204                         std::ostringstream tmp_os(std::ios_base::binary);
4205                         bool bad = false;
4206                         for(;;){
4207                                 char buf[1024];
4208                                 fis.read(buf, 1024);
4209                                 std::streamsize len = fis.gcount();
4210                                 tmp_os.write(buf, len);
4211                                 if(fis.eof())
4212                                         break;
4213                                 if(!fis.good()){
4214                                         bad = true;
4215                                         break;
4216                                 }
4217                         }
4218                         if(bad){
4219                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
4220                                                 <<filename<<"\""<<std::endl;
4221                                 continue;
4222                         }
4223                         if(tmp_os.str().length() == 0){
4224                                 errorstream<<"Server::fillMediaCache(): Empty file \""
4225                                                 <<filepath<<"\""<<std::endl;
4226                                 continue;
4227                         }
4228
4229                         SHA1 sha1;
4230                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
4231
4232                         unsigned char *digest = sha1.getDigest();
4233                         std::string sha1_base64 = base64_encode(digest, 20);
4234                         std::string sha1_hex = hex_encode((char*)digest, 20);
4235                         free(digest);
4236
4237                         // Put in list
4238                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
4239                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
4240                 }
4241         }
4242 }
4243
4244 struct SendableMediaAnnouncement
4245 {
4246         std::string name;
4247         std::string sha1_digest;
4248
4249         SendableMediaAnnouncement(const std::string name_="",
4250                         const std::string sha1_digest_=""):
4251                 name(name_),
4252                 sha1_digest(sha1_digest_)
4253         {}
4254 };
4255
4256 void Server::sendMediaAnnouncement(u16 peer_id)
4257 {
4258         DSTACK(__FUNCTION_NAME);
4259
4260         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4261                         <<std::endl;
4262
4263         core::list<SendableMediaAnnouncement> file_announcements;
4264
4265         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4266                         i != m_media.end(); i++){
4267                 // Put in list
4268                 file_announcements.push_back(
4269                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4270         }
4271
4272         // Make packet
4273         std::ostringstream os(std::ios_base::binary);
4274
4275         /*
4276                 u16 command
4277                 u32 number of files
4278                 for each texture {
4279                         u16 length of name
4280                         string name
4281                         u16 length of sha1_digest
4282                         string sha1_digest
4283                 }
4284         */
4285
4286         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4287         writeU16(os, file_announcements.size());
4288
4289         for(core::list<SendableMediaAnnouncement>::Iterator
4290                         j = file_announcements.begin();
4291                         j != file_announcements.end(); j++){
4292                 os<<serializeString(j->name);
4293                 os<<serializeString(j->sha1_digest);
4294         }
4295         os<<serializeString(g_settings->get("remote_media"));
4296
4297         // Make data buffer
4298         std::string s = os.str();
4299         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4300
4301         // Send as reliable
4302         m_con.Send(peer_id, 0, data, true);
4303 }
4304
4305 struct SendableMedia
4306 {
4307         std::string name;
4308         std::string path;
4309         std::string data;
4310
4311         SendableMedia(const std::string &name_="", const std::string path_="",
4312                         const std::string &data_=""):
4313                 name(name_),
4314                 path(path_),
4315                 data(data_)
4316         {}
4317 };
4318
4319 void Server::sendRequestedMedia(u16 peer_id,
4320                 const core::list<MediaRequest> &tosend)
4321 {
4322         DSTACK(__FUNCTION_NAME);
4323
4324         verbosestream<<"Server::sendRequestedMedia(): "
4325                         <<"Sending files to client"<<std::endl;
4326
4327         /* Read files */
4328
4329         // Put 5kB in one bunch (this is not accurate)
4330         u32 bytes_per_bunch = 5000;
4331
4332         core::array< core::list<SendableMedia> > file_bunches;
4333         file_bunches.push_back(core::list<SendableMedia>());
4334
4335         u32 file_size_bunch_total = 0;
4336
4337         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4338                         i != tosend.end(); i++)
4339         {
4340                 if(m_media.find(i->name) == m_media.end()){
4341                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4342                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4343                         continue;
4344                 }
4345
4346                 //TODO get path + name
4347                 std::string tpath = m_media[(*i).name].path;
4348
4349                 // Read data
4350                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4351                 if(fis.good() == false){
4352                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4353                                         <<tpath<<"\" for reading"<<std::endl;
4354                         continue;
4355                 }
4356                 std::ostringstream tmp_os(std::ios_base::binary);
4357                 bool bad = false;
4358                 for(;;){
4359                         char buf[1024];
4360                         fis.read(buf, 1024);
4361                         std::streamsize len = fis.gcount();
4362                         tmp_os.write(buf, len);
4363                         file_size_bunch_total += len;
4364                         if(fis.eof())
4365                                 break;
4366                         if(!fis.good()){
4367                                 bad = true;
4368                                 break;
4369                         }
4370                 }
4371                 if(bad){
4372                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4373                                         <<(*i).name<<"\""<<std::endl;
4374                         continue;
4375                 }
4376                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4377                                 <<tname<<"\""<<std::endl;*/
4378                 // Put in list
4379                 file_bunches[file_bunches.size()-1].push_back(
4380                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4381
4382                 // Start next bunch if got enough data
4383                 if(file_size_bunch_total >= bytes_per_bunch){
4384                         file_bunches.push_back(core::list<SendableMedia>());
4385                         file_size_bunch_total = 0;
4386                 }
4387
4388         }
4389
4390         /* Create and send packets */
4391
4392         u32 num_bunches = file_bunches.size();
4393         for(u32 i=0; i<num_bunches; i++)
4394         {
4395                 std::ostringstream os(std::ios_base::binary);
4396
4397                 /*
4398                         u16 command
4399                         u16 total number of texture bunches
4400                         u16 index of this bunch
4401                         u32 number of files in this bunch
4402                         for each file {
4403                                 u16 length of name
4404                                 string name
4405                                 u32 length of data
4406                                 data
4407                         }
4408                 */
4409
4410                 writeU16(os, TOCLIENT_MEDIA);
4411                 writeU16(os, num_bunches);
4412                 writeU16(os, i);
4413                 writeU32(os, file_bunches[i].size());
4414
4415                 for(core::list<SendableMedia>::Iterator
4416                                 j = file_bunches[i].begin();
4417                                 j != file_bunches[i].end(); j++){
4418                         os<<serializeString(j->name);
4419                         os<<serializeLongString(j->data);
4420                 }
4421
4422                 // Make data buffer
4423                 std::string s = os.str();
4424                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4425                                 <<i<<"/"<<num_bunches
4426                                 <<" files="<<file_bunches[i].size()
4427                                 <<" size=" <<s.size()<<std::endl;
4428                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4429                 // Send as reliable
4430                 m_con.Send(peer_id, 0, data, true);
4431         }
4432 }
4433
4434 void Server::sendDetachedInventory(const std::string &name, u16 peer_id)
4435 {
4436         if(m_detached_inventories.count(name) == 0){
4437                 errorstream<<__FUNCTION_NAME<<": \""<<name<<"\" not found"<<std::endl;
4438                 return;
4439         }
4440         Inventory *inv = m_detached_inventories[name];
4441
4442         std::ostringstream os(std::ios_base::binary);
4443         writeU16(os, TOCLIENT_DETACHED_INVENTORY);
4444         os<<serializeString(name);
4445         inv->serialize(os);
4446
4447         // Make data buffer
4448         std::string s = os.str();
4449         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4450         // Send as reliable
4451         m_con.Send(peer_id, 0, data, true);
4452 }
4453
4454 void Server::sendDetachedInventoryToAll(const std::string &name)
4455 {
4456         DSTACK(__FUNCTION_NAME);
4457
4458         for(core::map<u16, RemoteClient*>::Iterator
4459                         i = m_clients.getIterator();
4460                         i.atEnd() == false; i++){
4461                 RemoteClient *client = i.getNode()->getValue();
4462                 sendDetachedInventory(name, client->peer_id);
4463         }
4464 }
4465
4466 void Server::sendDetachedInventories(u16 peer_id)
4467 {
4468         DSTACK(__FUNCTION_NAME);
4469
4470         for(std::map<std::string, Inventory*>::iterator
4471                         i = m_detached_inventories.begin();
4472                         i != m_detached_inventories.end(); i++){
4473                 const std::string &name = i->first;
4474                 //Inventory *inv = i->second;
4475                 sendDetachedInventory(name, peer_id);
4476         }
4477 }
4478
4479 /*
4480         Something random
4481 */
4482
4483 void Server::DiePlayer(u16 peer_id)
4484 {
4485         DSTACK(__FUNCTION_NAME);
4486
4487         PlayerSAO *playersao = getPlayerSAO(peer_id);
4488         assert(playersao);
4489
4490         infostream<<"Server::DiePlayer(): Player "
4491                         <<playersao->getPlayer()->getName()
4492                         <<" dies"<<std::endl;
4493
4494         playersao->setHP(0);
4495
4496         // Trigger scripted stuff
4497         scriptapi_on_dieplayer(m_lua, playersao);
4498
4499         SendPlayerHP(peer_id);
4500         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4501 }
4502
4503 void Server::RespawnPlayer(u16 peer_id)
4504 {
4505         DSTACK(__FUNCTION_NAME);
4506
4507         PlayerSAO *playersao = getPlayerSAO(peer_id);
4508         assert(playersao);
4509
4510         infostream<<"Server::RespawnPlayer(): Player "
4511                         <<playersao->getPlayer()->getName()
4512                         <<" respawns"<<std::endl;
4513
4514         playersao->setHP(PLAYER_MAX_HP);
4515
4516         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4517         if(!repositioned){
4518                 v3f pos = findSpawnPos(m_env->getServerMap());
4519                 playersao->setPos(pos);
4520         }
4521 }
4522
4523 void Server::UpdateCrafting(u16 peer_id)
4524 {
4525         DSTACK(__FUNCTION_NAME);
4526
4527         Player* player = m_env->getPlayer(peer_id);
4528         assert(player);
4529
4530         // Get a preview for crafting
4531         ItemStack preview;
4532         getCraftingResult(&player->inventory, preview, false, this);
4533
4534         // Put the new preview in
4535         InventoryList *plist = player->inventory.getList("craftpreview");
4536         assert(plist);
4537         assert(plist->getSize() >= 1);
4538         plist->changeItem(0, preview);
4539 }
4540
4541 RemoteClient* Server::getClient(u16 peer_id)
4542 {
4543         DSTACK(__FUNCTION_NAME);
4544         //JMutexAutoLock lock(m_con_mutex);
4545         core::map<u16, RemoteClient*>::Node *n;
4546         n = m_clients.find(peer_id);
4547         // A client should exist for all peers
4548         assert(n != NULL);
4549         return n->getValue();
4550 }
4551
4552 std::wstring Server::getStatusString()
4553 {
4554         std::wostringstream os(std::ios_base::binary);
4555         os<<L"# Server: ";
4556         // Version
4557         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4558         // Uptime
4559         os<<L", uptime="<<m_uptime.get();
4560         // Information about clients
4561         core::map<u16, RemoteClient*>::Iterator i;
4562         bool first;
4563         os<<L", clients={";
4564         for(i = m_clients.getIterator(), first = true;
4565                 i.atEnd() == false; i++)
4566         {
4567                 // Get client and check that it is valid
4568                 RemoteClient *client = i.getNode()->getValue();
4569                 assert(client->peer_id == i.getNode()->getKey());
4570                 if(client->serialization_version == SER_FMT_VER_INVALID)
4571                         continue;
4572                 // Get player
4573                 Player *player = m_env->getPlayer(client->peer_id);
4574                 // Get name of player
4575                 std::wstring name = L"unknown";
4576                 if(player != NULL)
4577                         name = narrow_to_wide(player->getName());
4578                 // Add name to information string
4579                 if(!first)
4580                         os<<L",";
4581                 else
4582                         first = false;
4583                 os<<name;
4584         }
4585         os<<L"}";
4586         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4587                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4588         if(g_settings->get("motd") != "")
4589                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4590         return os.str();
4591 }
4592
4593 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4594 {
4595         std::set<std::string> privs;
4596         scriptapi_get_auth(m_lua, name, NULL, &privs);
4597         return privs;
4598 }
4599
4600 bool Server::checkPriv(const std::string &name, const std::string &priv)
4601 {
4602         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4603         return (privs.count(priv) != 0);
4604 }
4605
4606 void Server::reportPrivsModified(const std::string &name)
4607 {
4608         if(name == ""){
4609                 for(core::map<u16, RemoteClient*>::Iterator
4610                                 i = m_clients.getIterator();
4611                                 i.atEnd() == false; i++){
4612                         RemoteClient *client = i.getNode()->getValue();
4613                         Player *player = m_env->getPlayer(client->peer_id);
4614                         reportPrivsModified(player->getName());
4615                 }
4616         } else {
4617                 Player *player = m_env->getPlayer(name.c_str());
4618                 if(!player)
4619                         return;
4620                 SendPlayerPrivileges(player->peer_id);
4621                 PlayerSAO *sao = player->getPlayerSAO();
4622                 if(!sao)
4623                         return;
4624                 sao->updatePrivileges(
4625                                 getPlayerEffectivePrivs(name),
4626                                 isSingleplayer());
4627         }
4628 }
4629
4630 void Server::reportInventoryFormspecModified(const std::string &name)
4631 {
4632         Player *player = m_env->getPlayer(name.c_str());
4633         if(!player)
4634                 return;
4635         SendPlayerInventoryFormspec(player->peer_id);
4636 }
4637
4638 // Saves g_settings to configpath given at initialization
4639 void Server::saveConfig()
4640 {
4641         if(m_path_config != "")
4642                 g_settings->updateConfigFile(m_path_config.c_str());
4643 }
4644
4645 void Server::notifyPlayer(const char *name, const std::wstring msg)
4646 {
4647         Player *player = m_env->getPlayer(name);
4648         if(!player)
4649                 return;
4650         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4651 }
4652
4653 bool Server::showFormspec(const char *playername, const std::string &formspec, const std::string &formname)
4654 {
4655         Player *player = m_env->getPlayer(playername);
4656
4657         if(!player)
4658         {
4659                 infostream<<"showFormspec: couldn't find player:"<<playername<<std::endl;
4660                 return false;
4661         }
4662
4663         SendShowFormspecMessage(player->peer_id, formspec, formname);
4664         return true;
4665 }
4666
4667 void Server::notifyPlayers(const std::wstring msg)
4668 {
4669         BroadcastChatMessage(msg);
4670 }
4671
4672 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4673 {
4674         u8 flags = 0;
4675         if(!allow_generate)
4676                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4677         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4678 }
4679
4680 Inventory* Server::createDetachedInventory(const std::string &name)
4681 {
4682         if(m_detached_inventories.count(name) > 0){
4683                 infostream<<"Server clearing detached inventory \""<<name<<"\""<<std::endl;
4684                 delete m_detached_inventories[name];
4685         } else {
4686                 infostream<<"Server creating detached inventory \""<<name<<"\""<<std::endl;
4687         }
4688         Inventory *inv = new Inventory(m_itemdef);
4689         assert(inv);
4690         m_detached_inventories[name] = inv;
4691         sendDetachedInventoryToAll(name);
4692         return inv;
4693 }
4694
4695 class BoolScopeSet
4696 {
4697 public:
4698         BoolScopeSet(bool *dst, bool val):
4699                 m_dst(dst)
4700         {
4701                 m_orig_state = *m_dst;
4702                 *m_dst = val;
4703         }
4704         ~BoolScopeSet()
4705         {
4706                 *m_dst = m_orig_state;
4707         }
4708 private:
4709         bool *m_dst;
4710         bool m_orig_state;
4711 };
4712
4713 // actions: time-reversed list
4714 // Return value: success/failure
4715 bool Server::rollbackRevertActions(const std::list<RollbackAction> &actions,
4716                 std::list<std::string> *log)
4717 {
4718         infostream<<"Server::rollbackRevertActions(len="<<actions.size()<<")"<<std::endl;
4719         ServerMap *map = (ServerMap*)(&m_env->getMap());
4720         // Disable rollback report sink while reverting
4721         BoolScopeSet rollback_scope_disable(&m_rollback_sink_enabled, false);
4722
4723         // Fail if no actions to handle
4724         if(actions.empty()){
4725                 log->push_back("Nothing to do.");
4726                 return false;
4727         }
4728
4729         int num_tried = 0;
4730         int num_failed = 0;
4731
4732         for(std::list<RollbackAction>::const_iterator
4733                         i = actions.begin();
4734                         i != actions.end(); i++)
4735         {
4736                 const RollbackAction &action = *i;
4737                 num_tried++;
4738                 bool success = action.applyRevert(map, this, this);
4739                 if(!success){
4740                         num_failed++;
4741                         std::ostringstream os;
4742                         os<<"Revert of step ("<<num_tried<<") "<<action.toString()<<" failed";
4743                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4744                         if(log)
4745                                 log->push_back(os.str());
4746                 }else{
4747                         std::ostringstream os;
4748                         os<<"Successfully reverted step ("<<num_tried<<") "<<action.toString();
4749                         infostream<<"Map::rollbackRevertActions(): "<<os.str()<<std::endl;
4750                         if(log)
4751                                 log->push_back(os.str());
4752                 }
4753         }
4754
4755         infostream<<"Map::rollbackRevertActions(): "<<num_failed<<"/"<<num_tried
4756                         <<" failed"<<std::endl;
4757
4758         // Call it done if less than half failed
4759         return num_failed <= num_tried/2;
4760 }
4761
4762 // IGameDef interface
4763 // Under envlock
4764 IItemDefManager* Server::getItemDefManager()
4765 {
4766         return m_itemdef;
4767 }
4768 INodeDefManager* Server::getNodeDefManager()
4769 {
4770         return m_nodedef;
4771 }
4772 ICraftDefManager* Server::getCraftDefManager()
4773 {
4774         return m_craftdef;
4775 }
4776 ITextureSource* Server::getTextureSource()
4777 {
4778         return NULL;
4779 }
4780 IShaderSource* Server::getShaderSource()
4781 {
4782         return NULL;
4783 }
4784 u16 Server::allocateUnknownNodeId(const std::string &name)
4785 {
4786         return m_nodedef->allocateDummy(name);
4787 }
4788 ISoundManager* Server::getSoundManager()
4789 {
4790         return &dummySoundManager;
4791 }
4792 MtEventManager* Server::getEventManager()
4793 {
4794         return m_event;
4795 }
4796 IRollbackReportSink* Server::getRollbackReportSink()
4797 {
4798         if(!m_enable_rollback_recording)
4799                 return NULL;
4800         if(!m_rollback_sink_enabled)
4801                 return NULL;
4802         return m_rollback;
4803 }
4804
4805 IWritableItemDefManager* Server::getWritableItemDefManager()
4806 {
4807         return m_itemdef;
4808 }
4809 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4810 {
4811         return m_nodedef;
4812 }
4813 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4814 {
4815         return m_craftdef;
4816 }
4817
4818 const ModSpec* Server::getModSpec(const std::string &modname)
4819 {
4820         for(std::vector<ModSpec>::iterator i = m_mods.begin();
4821                         i != m_mods.end(); i++){
4822                 const ModSpec &mod = *i;
4823                 if(mod.name == modname)
4824                         return &mod;
4825         }
4826         return NULL;
4827 }
4828 void Server::getModNames(core::list<std::string> &modlist)
4829 {
4830         for(std::vector<ModSpec>::iterator i = m_mods.begin(); i != m_mods.end(); i++)
4831         {
4832                 modlist.push_back((*i).name);
4833         }
4834 }
4835 std::string Server::getBuiltinLuaPath()
4836 {
4837         return porting::path_share + DIR_DELIM + "builtin";
4838 }
4839
4840 v3f findSpawnPos(ServerMap &map)
4841 {
4842         //return v3f(50,50,50)*BS;
4843
4844         v3s16 nodepos;
4845
4846 #if 0
4847         nodepos = v2s16(0,0);
4848         groundheight = 20;
4849 #endif
4850
4851 #if 1
4852         s16 water_level = map.m_emerge->water_level; //g_settings->getS16("default_water_level");
4853
4854         // Try to find a good place a few times
4855         for(s32 i=0; i<1000; i++)
4856         {
4857                 s32 range = 1 + i;
4858                 // We're going to try to throw the player to this position
4859                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4860                                 -range + (myrand()%(range*2)));
4861                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4862                 // Get ground height at point (fallbacks to heightmap function)
4863                 s16 groundheight = map.findGroundLevel(nodepos2d);
4864                 // Don't go underwater
4865                 if(groundheight <= water_level)
4866                 {
4867                         //infostream<<"-> Underwater"<<std::endl;
4868                         continue;
4869                 }
4870                 // Don't go to high places
4871                 if(groundheight > water_level + 6)
4872                 {
4873                         //infostream<<"-> Underwater"<<std::endl;
4874                         continue;
4875                 }
4876
4877                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4878                 bool is_good = false;
4879                 s32 air_count = 0;
4880                 for(s32 i=0; i<10; i++){
4881                         v3s16 blockpos = getNodeBlockPos(nodepos);
4882                         map.emergeBlock(blockpos, true);
4883                         MapNode n = map.getNodeNoEx(nodepos);
4884                         if(n.getContent() == CONTENT_AIR){
4885                                 air_count++;
4886                                 if(air_count >= 2){
4887                                         is_good = true;
4888                                         nodepos.Y -= 1;
4889                                         break;
4890                                 }
4891                         }
4892                         nodepos.Y++;
4893                 }
4894                 if(is_good){
4895                         // Found a good place
4896                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4897                         break;
4898                 }
4899         }
4900 #endif
4901
4902         return intToFloat(nodepos, BS);
4903 }
4904
4905 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4906 {
4907         RemotePlayer *player = NULL;
4908         bool newplayer = false;
4909
4910         /*
4911                 Try to get an existing player
4912         */
4913         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4914
4915         // If player is already connected, cancel
4916         if(player != NULL && player->peer_id != 0)
4917         {
4918                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4919                 return NULL;
4920         }
4921
4922         /*
4923                 If player with the wanted peer_id already exists, cancel.
4924         */
4925         if(m_env->getPlayer(peer_id) != NULL)
4926         {
4927                 infostream<<"emergePlayer(): Player with wrong name but same"
4928                                 " peer_id already exists"<<std::endl;
4929                 return NULL;
4930         }
4931
4932         /*
4933                 Create a new player if it doesn't exist yet
4934         */
4935         if(player == NULL)
4936         {
4937                 newplayer = true;
4938                 player = new RemotePlayer(this);
4939                 player->updateName(name);
4940
4941                 /* Set player position */
4942                 infostream<<"Server: Finding spawn place for player \""
4943                                 <<name<<"\""<<std::endl;
4944                 v3f pos = findSpawnPos(m_env->getServerMap());
4945                 player->setPosition(pos);
4946
4947                 /* Add player to environment */
4948                 m_env->addPlayer(player);
4949         }
4950
4951         /*
4952                 Create a new player active object
4953         */
4954         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4955                         getPlayerEffectivePrivs(player->getName()),
4956                         isSingleplayer());
4957
4958         /* Add object to environment */
4959         m_env->addActiveObject(playersao);
4960
4961         /* Run scripts */
4962         if(newplayer)
4963                 scriptapi_on_newplayer(m_lua, playersao);
4964
4965         scriptapi_on_joinplayer(m_lua, playersao);
4966
4967         return playersao;
4968 }
4969
4970 void Server::handlePeerChange(PeerChange &c)
4971 {
4972         JMutexAutoLock envlock(m_env_mutex);
4973         JMutexAutoLock conlock(m_con_mutex);
4974
4975         if(c.type == PEER_ADDED)
4976         {
4977                 /*
4978                         Add
4979                 */
4980
4981                 // Error check
4982                 core::map<u16, RemoteClient*>::Node *n;
4983                 n = m_clients.find(c.peer_id);
4984                 // The client shouldn't already exist
4985                 assert(n == NULL);
4986
4987                 // Create client
4988                 RemoteClient *client = new RemoteClient();
4989                 client->peer_id = c.peer_id;
4990                 m_clients.insert(client->peer_id, client);
4991
4992         } // PEER_ADDED
4993         else if(c.type == PEER_REMOVED)
4994         {
4995                 /*
4996                         Delete
4997                 */
4998
4999                 // Error check
5000                 core::map<u16, RemoteClient*>::Node *n;
5001                 n = m_clients.find(c.peer_id);
5002                 // The client should exist
5003                 assert(n != NULL);
5004
5005                 /*
5006                         Mark objects to be not known by the client
5007                 */
5008                 RemoteClient *client = n->getValue();
5009                 // Handle objects
5010                 for(core::map<u16, bool>::Iterator
5011                                 i = client->m_known_objects.getIterator();
5012                                 i.atEnd()==false; i++)
5013                 {
5014                         // Get object
5015                         u16 id = i.getNode()->getKey();
5016                         ServerActiveObject* obj = m_env->getActiveObject(id);
5017
5018                         if(obj && obj->m_known_by_count > 0)
5019                                 obj->m_known_by_count--;
5020                 }
5021
5022                 /*
5023                         Clear references to playing sounds
5024                 */
5025                 for(std::map<s32, ServerPlayingSound>::iterator
5026                                 i = m_playing_sounds.begin();
5027                                 i != m_playing_sounds.end();)
5028                 {
5029                         ServerPlayingSound &psound = i->second;
5030                         psound.clients.erase(c.peer_id);
5031                         if(psound.clients.size() == 0)
5032                                 m_playing_sounds.erase(i++);
5033                         else
5034                                 i++;
5035                 }
5036
5037                 Player *player = m_env->getPlayer(c.peer_id);
5038
5039                 // Collect information about leaving in chat
5040                 std::wstring message;
5041                 {
5042                         if(player != NULL)
5043                         {
5044                                 std::wstring name = narrow_to_wide(player->getName());
5045                                 message += L"*** ";
5046                                 message += name;
5047                                 message += L" left the game.";
5048                                 if(c.timeout)
5049                                         message += L" (timed out)";
5050                         }
5051                 }
5052
5053                 /* Run scripts and remove from environment */
5054                 {
5055                         if(player != NULL)
5056                         {
5057                                 PlayerSAO *playersao = player->getPlayerSAO();
5058                                 assert(playersao);
5059
5060                                 scriptapi_on_leaveplayer(m_lua, playersao);
5061
5062                                 playersao->disconnected();
5063                         }
5064                 }
5065
5066                 /*
5067                         Print out action
5068                 */
5069                 {
5070                         if(player != NULL)
5071                         {
5072                                 std::ostringstream os(std::ios_base::binary);
5073                                 for(core::map<u16, RemoteClient*>::Iterator
5074                                         i = m_clients.getIterator();
5075                                         i.atEnd() == false; i++)
5076                                 {
5077                                         RemoteClient *client = i.getNode()->getValue();
5078                                         assert(client->peer_id == i.getNode()->getKey());
5079                                         if(client->serialization_version == SER_FMT_VER_INVALID)
5080                                                 continue;
5081                                         // Get player
5082                                         Player *player = m_env->getPlayer(client->peer_id);
5083                                         if(!player)
5084                                                 continue;
5085                                         // Get name of player
5086                                         os<<player->getName()<<" ";
5087                                 }
5088
5089                                 actionstream<<player->getName()<<" "
5090                                                 <<(c.timeout?"times out.":"leaves game.")
5091                                                 <<" List of players: "
5092                                                 <<os.str()<<std::endl;
5093                         }
5094                 }
5095
5096                 // Delete client
5097                 delete m_clients[c.peer_id];
5098                 m_clients.remove(c.peer_id);
5099
5100                 // Send player info to all remaining clients
5101                 //SendPlayerInfos();
5102
5103                 // Send leave chat message to all remaining clients
5104                 if(message.length() != 0)
5105                         BroadcastChatMessage(message);
5106
5107         } // PEER_REMOVED
5108         else
5109         {
5110                 assert(0);
5111         }
5112 }
5113
5114 void Server::handlePeerChanges()
5115 {
5116         while(m_peer_change_queue.size() > 0)
5117         {
5118                 PeerChange c = m_peer_change_queue.pop_front();
5119
5120                 verbosestream<<"Server: Handling peer change: "
5121                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
5122                                 <<std::endl;
5123
5124                 handlePeerChange(c);
5125         }
5126 }
5127
5128 void dedicated_server_loop(Server &server, bool &kill)
5129 {
5130         DSTACK(__FUNCTION_NAME);
5131
5132         verbosestream<<"dedicated_server_loop()"<<std::endl;
5133
5134         IntervalLimiter m_profiler_interval;
5135
5136         for(;;)
5137         {
5138                 float steplen = g_settings->getFloat("dedicated_server_step");
5139                 // This is kind of a hack but can be done like this
5140                 // because server.step() is very light
5141                 {
5142                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
5143                         sleep_ms((int)(steplen*1000.0));
5144                 }
5145                 server.step(steplen);
5146
5147                 if(server.getShutdownRequested() || kill)
5148                 {
5149                         infostream<<"Dedicated server quitting"<<std::endl;
5150                         break;
5151                 }
5152
5153                 /*
5154                         Profiler
5155                 */
5156                 float profiler_print_interval =
5157                                 g_settings->getFloat("profiler_print_interval");
5158                 if(profiler_print_interval != 0)
5159                 {
5160                         if(m_profiler_interval.step(steplen, profiler_print_interval))
5161                         {
5162                                 infostream<<"Profiler:"<<std::endl;
5163                                 g_profiler->print(infostream);
5164                                 g_profiler->clear();
5165                         }
5166                 }
5167         }
5168 }
5169
5170