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 "utility.h"
  22 #include <iostream>
  23 #include <queue>
  24 #include "clientserver.h"
  25 #include "map.h"
  26 #include "jmutexautolock.h"
  27 #include "main.h"
  28 #include "constants.h"
  29 #include "voxel.h"
  30 #include "config.h"
  31 #include "servercommand.h"
  32 #include "filesys.h"
  33 #include "mapblock.h"
  34 #include "serverobject.h"
  35 #include "settings.h"
  36 #include "profiler.h"
  37 #include "log.h"
  38 #include "script.h"
  39 #include "scriptapi.h"
  40 #include "nodedef.h"
  41 #include "itemdef.h"
  42 #include "craftdef.h"
  43 #include "mapgen.h"
  44 #include "content_mapnode.h"
  45 #include "content_nodemeta.h"
  46 #include "content_abm.h"
  47 #include "content_sao.h"
  48 #include "mods.h"
  49 #include "sha1.h"
  50 #include "base64.h"
  51 #include "tool.h"
  52 #include "utility_string.h"
  53 #include "sound.h" // dummySoundManager
  54 #include "event_manager.h"
  55 #include "hex.h"
  56
  57 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
  58
  59 #define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)
  60
  61 class MapEditEventIgnorer
  62 {
  63 public:
  64         MapEditEventIgnorer(bool *flag):
  65                 m_flag(flag)
  66         {
  67                 if(*m_flag == false)
  68                         *m_flag = true;
  69                 else
  70                         m_flag = NULL;
  71         }
  72
  73         ~MapEditEventIgnorer()
  74         {
  75                 if(m_flag)
  76                 {
  77                         assert(*m_flag);
  78                         *m_flag = false;
  79                 }
  80         }
  81
  82 private:
  83         bool *m_flag;
  84 };
  85
  86 class MapEditEventAreaIgnorer
  87 {
  88 public:
  89         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
  90                 m_ignorevariable(ignorevariable)
  91         {
  92                 if(m_ignorevariable->getVolume() == 0)
  93                         *m_ignorevariable = a;
  94                 else
  95                         m_ignorevariable = NULL;
  96         }
  97
  98         ~MapEditEventAreaIgnorer()
  99         {
 100                 if(m_ignorevariable)
 101                 {
 102                         assert(m_ignorevariable->getVolume() != 0);
 103                         *m_ignorevariable = VoxelArea();
 104                 }
 105         }
 106
 107 private:
 108         VoxelArea *m_ignorevariable;
 109 };
 110
 111 void * ServerThread::Thread()
 112 {
 113         ThreadStarted();
 114
 115         log_register_thread("ServerThread");
 116
 117         DSTACK(__FUNCTION_NAME);
 118
 119         BEGIN_DEBUG_EXCEPTION_HANDLER
 120
 121         while(getRun())
 122         {
 123                 try{
 124                         //TimeTaker timer("AsyncRunStep() + Receive()");
 125
 126                         {
 127                                 //TimeTaker timer("AsyncRunStep()");
 128                                 m_server->AsyncRunStep();
 129                         }
 130
 131                         //infostream<<"Running m_server->Receive()"<<std::endl;
 132                         m_server->Receive();
 133                 }
 134                 catch(con::NoIncomingDataException &e)
 135                 {
 136                 }
 137                 catch(con::PeerNotFoundException &e)
 138                 {
 139                         infostream<<"Server: PeerNotFoundException"<<std::endl;
 140                 }
 141                 catch(con::ConnectionBindFailed &e)
 142                 {
 143                         m_server->setAsyncFatalError(e.what());
 144                 }
 145                 catch(LuaError &e)
 146                 {
 147                         m_server->setAsyncFatalError(e.what());
 148                 }
 149         }
 150
 151         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 152
 153         return NULL;
 154 }
 155
 156 void * EmergeThread::Thread()
 157 {
 158         ThreadStarted();
 159
 160         log_register_thread("EmergeThread");
 161
 162         DSTACK(__FUNCTION_NAME);
 163
 164         BEGIN_DEBUG_EXCEPTION_HANDLER
 165
 166         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 167
 168         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 169
 170         /*
 171                 Get block info from queue, emerge them and send them
 172                 to clients.
 173
 174                 After queue is empty, exit.
 175         */
 176         while(getRun())
 177         try{
 178                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
 179                 if(qptr == NULL)
 180                         break;
 181
 182                 SharedPtr<QueuedBlockEmerge> q(qptr);
 183
 184                 v3s16 &p = q->pos;
 185                 v2s16 p2d(p.X,p.Z);
 186
 187                 last_tried_pos = p;
 188
 189                 /*
 190                         Do not generate over-limit
 191                 */
 192                 if(blockpos_over_limit(p))
 193                         continue;
 194
 195                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
 196
 197                 //TimeTaker timer("block emerge");
 198
 199                 /*
 200                         Try to emerge it from somewhere.
 201
 202                         If it is only wanted as optional, only loading from disk
 203                         will be allowed.
 204                 */
 205
 206                 /*
 207                         Check if any peer wants it as non-optional. In that case it
 208                         will be generated.
 209
 210                         Also decrement the emerge queue count in clients.
 211                 */
 212
 213                 bool only_from_disk = true;
 214
 215                 {
 216                         core::map<u16, u8>::Iterator i;
 217                         for(i=q->peer_ids.getIterator(); i.atEnd()==false; i++)
 218                         {
 219                                 //u16 peer_id = i.getNode()->getKey();
 220
 221                                 // Check flags
 222                                 u8 flags = i.getNode()->getValue();
 223                                 if((flags & BLOCK_EMERGE_FLAG_FROMDISK) == false)
 224                                         only_from_disk = false;
 225
 226                         }
 227                 }
 228
 229                 if(enable_mapgen_debug_info)
 230                         infostream<<"EmergeThread: p="
 231                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
 232                                         <<"only_from_disk="<<only_from_disk<<std::endl;
 233
 234                 ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
 235
 236                 MapBlock *block = NULL;
 237                 bool got_block = true;
 238                 core::map<v3s16, MapBlock*> modified_blocks;
 239
 240                 /*
 241                         Try to fetch block from memory or disk.
 242                         If not found and asked to generate, initialize generator.
 243                 */
 244
 245                 bool started_generate = false;
 246                 mapgen::BlockMakeData data;
 247
 248                 {
 249                         JMutexAutoLock envlock(m_server->m_env_mutex);
 250
 251                         // Load sector if it isn't loaded
 252                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
 253                                 map.loadSectorMeta(p2d);
 254
 255                         // Attempt to load block
 256                         block = map.getBlockNoCreateNoEx(p);
 257                         if(!block || block->isDummy() || !block->isGenerated())
 258                         {
 259                                 if(enable_mapgen_debug_info)
 260                                         infostream<<"EmergeThread: not in memory, "
 261                                                         <<"attempting to load from disk"<<std::endl;
 262
 263                                 block = map.loadBlock(p);
 264                         }
 265
 266                         // If could not load and allowed to generate, start generation
 267                         // inside this same envlock
 268                         if(only_from_disk == false &&
 269                                         (block == NULL || block->isGenerated() == false)){
 270                                 if(enable_mapgen_debug_info)
 271                                         infostream<<"EmergeThread: generating"<<std::endl;
 272                                 started_generate = true;
 273
 274                                 map.initBlockMake(&data, p);
 275                         }
 276                 }
 277
 278                 /*
 279                         If generator was initialized, generate now when envlock is free.
 280                 */
 281                 if(started_generate)
 282                 {
 283                         {
 284                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
 285                                                 SPT_AVG);
 286                                 TimeTaker t("mapgen::make_block()");
 287
 288                                 mapgen::make_block(&data);
 289
 290                                 if(enable_mapgen_debug_info == false)
 291                                         t.stop(true); // Hide output
 292                         }
 293
 294                         do{ // enable break
 295                                 // Lock environment again to access the map
 296                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 297
 298                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 299                                                 "mapgen::make_block (envlock)", SPT_AVG);
 300
 301                                 // Blit data back on map, update lighting, add mobs and
 302                                 // whatever this does
 303                                 map.finishBlockMake(&data, modified_blocks);
 304
 305                                 // Get central block
 306                                 block = map.getBlockNoCreateNoEx(p);
 307
 308                                 // If block doesn't exist, don't try doing anything with it
 309                                 // This happens if the block is not in generation boundaries
 310                                 if(!block)
 311                                         break;
 312
 313                                 /*
 314                                         Do some post-generate stuff
 315                                 */
 316
 317                                 v3s16 minp = data.blockpos_min*MAP_BLOCKSIZE;
 318                                 v3s16 maxp = data.blockpos_max*MAP_BLOCKSIZE +
 319                                                 v3s16(1,1,1)*(MAP_BLOCKSIZE-1);
 320
 321                                 /*
 322                                         Ignore map edit events, they will not need to be
 323                                         sent to anybody because the block hasn't been sent
 324                                         to anybody
 325                                 */
 326                                 //MapEditEventIgnorer ign(&m_server->m_ignore_map_edit_events);
 327                                 MapEditEventAreaIgnorer ign(
 328                                                 &m_server->m_ignore_map_edit_events_area,
 329                                                 VoxelArea(minp, maxp));
 330                                 {
 331                                         TimeTaker timer("on_generated");
 332                                         scriptapi_environment_on_generated(m_server->m_lua,
 333                                                         minp, maxp, mapgen::get_blockseed(data.seed, minp));
 334                                         /*int t = timer.stop(true);
 335                                         dstream<<"on_generated took "<<t<<"ms"<<std::endl;*/
 336                                 }
 337
 338                                 if(enable_mapgen_debug_info)
 339                                         infostream<<"EmergeThread: ended up with: "
 340                                                         <<analyze_block(block)<<std::endl;
 341
 342                                 // Activate objects and stuff
 343                                 m_server->m_env->activateBlock(block, 0);
 344                         }while(false);
 345                 }
 346
 347                 if(block == NULL)
 348                         got_block = false;
 349
 350                 /*
 351                         Set sent status of modified blocks on clients
 352                 */
 353
 354                 // NOTE: Server's clients are also behind the connection mutex
 355                 JMutexAutoLock lock(m_server->m_con_mutex);
 356
 357                 /*
 358                         Add the originally fetched block to the modified list
 359                 */
 360                 if(got_block)
 361                 {
 362                         modified_blocks.insert(p, block);
 363                 }
 364
 365                 /*
 366                         Set the modified blocks unsent for all the clients
 367                 */
 368
 369                 for(core::map<u16, RemoteClient*>::Iterator
 370                                 i = m_server->m_clients.getIterator();
 371                                 i.atEnd() == false; i++)
 372                 {
 373                         RemoteClient *client = i.getNode()->getValue();
 374
 375                         if(modified_blocks.size() > 0)
 376                         {
 377                                 // Remove block from sent history
 378                                 client->SetBlocksNotSent(modified_blocks);
 379                         }
 380                 }
 381         }
 382         catch(VersionMismatchException &e)
 383         {
 384                 std::ostringstream err;
 385                 err<<"World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 386                 err<<"----"<<std::endl;
 387                 err<<"\""<<e.what()<<"\""<<std::endl;
 388                 err<<"See debug.txt."<<std::endl;
 389                 err<<"World probably saved by a newer version of Minetest."<<std::endl;
 390                 m_server->setAsyncFatalError(err.str());
 391         }
 392         catch(SerializationError &e)
 393         {
 394                 std::ostringstream err;
 395                 err<<"Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 396                 err<<"----"<<std::endl;
 397                 err<<"\""<<e.what()<<"\""<<std::endl;
 398                 err<<"See debug.txt."<<std::endl;
 399                 err<<"You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 400                 m_server->setAsyncFatalError(err.str());
 401         }
 402
 403         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 404
 405         log_deregister_thread();
 406
 407         return NULL;
 408 }
 409
 410 v3f ServerSoundParams::getPos(ServerEnvironment *env, bool *pos_exists) const
 411 {
 412         if(pos_exists) *pos_exists = false;
 413         switch(type){
 414         case SSP_LOCAL:
 415                 return v3f(0,0,0);
 416         case SSP_POSITIONAL:
 417                 if(pos_exists) *pos_exists = true;
 418                 return pos;
 419         case SSP_OBJECT: {
 420                 if(object == 0)
 421                         return v3f(0,0,0);
 422                 ServerActiveObject *sao = env->getActiveObject(object);
 423                 if(!sao)
 424                         return v3f(0,0,0);
 425                 if(pos_exists) *pos_exists = true;
 426                 return sao->getBasePosition(); }
 427         }
 428         return v3f(0,0,0);
 429 }
 430
 431 void RemoteClient::GetNextBlocks(Server *server, float dtime,
 432                 core::array<PrioritySortedBlockTransfer> &dest)
 433 {
 434         DSTACK(__FUNCTION_NAME);
 435
 436         /*u32 timer_result;
 437         TimeTaker timer("RemoteClient::GetNextBlocks", &timer_result);*/
 438
 439         // Increment timers
 440         m_nothing_to_send_pause_timer -= dtime;
 441         m_nearest_unsent_reset_timer += dtime;
 442
 443         if(m_nothing_to_send_pause_timer >= 0)
 444         {
 445                 return;
 446         }
 447
 448         // Won't send anything if already sending
 449         if(m_blocks_sending.size() >= g_settings->getU16
 450                         ("max_simultaneous_block_sends_per_client"))
 451         {
 452                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 453                 return;
 454         }
 455
 456         //TimeTaker timer("RemoteClient::GetNextBlocks");
 457
 458         Player *player = server->m_env->getPlayer(peer_id);
 459
 460         assert(player != NULL);
 461
 462         v3f playerpos = player->getPosition();
 463         v3f playerspeed = player->getSpeed();
 464         v3f playerspeeddir(0,0,0);
 465         if(playerspeed.getLength() > 1.0*BS)
 466                 playerspeeddir = playerspeed / playerspeed.getLength();
 467         // Predict to next block
 468         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 469
 470         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 471
 472         v3s16 center = getNodeBlockPos(center_nodepos);
 473
 474         // Camera position and direction
 475         v3f camera_pos = player->getEyePosition();
 476         v3f camera_dir = v3f(0,0,1);
 477         camera_dir.rotateYZBy(player->getPitch());
 478         camera_dir.rotateXZBy(player->getYaw());
 479
 480         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 481                         <<camera_dir.Z<<")"<<std::endl;*/
 482
 483         /*
 484                 Get the starting value of the block finder radius.
 485         */
 486
 487         if(m_last_center != center)
 488         {
 489                 m_nearest_unsent_d = 0;
 490                 m_last_center = center;
 491         }
 492
 493         /*infostream<<"m_nearest_unsent_reset_timer="
 494                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 495
 496         // Reset periodically to workaround for some bugs or stuff
 497         if(m_nearest_unsent_reset_timer > 20.0)
 498         {
 499                 m_nearest_unsent_reset_timer = 0;
 500                 m_nearest_unsent_d = 0;
 501                 //infostream<<"Resetting m_nearest_unsent_d for "
 502                 //              <<server->getPlayerName(peer_id)<<std::endl;
 503         }
 504
 505         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 506         s16 d_start = m_nearest_unsent_d;
 507
 508         //infostream<<"d_start="<<d_start<<std::endl;
 509
 510         u16 max_simul_sends_setting = g_settings->getU16
 511                         ("max_simultaneous_block_sends_per_client");
 512         u16 max_simul_sends_usually = max_simul_sends_setting;
 513
 514         /*
 515                 Check the time from last addNode/removeNode.
 516
 517                 Decrease send rate if player is building stuff.
 518         */
 519         m_time_from_building += dtime;
 520         if(m_time_from_building < g_settings->getFloat(
 521                                 "full_block_send_enable_min_time_from_building"))
 522         {
 523                 max_simul_sends_usually
 524                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 525         }
 526
 527         /*
 528                 Number of blocks sending + number of blocks selected for sending
 529         */
 530         u32 num_blocks_selected = m_blocks_sending.size();
 531
 532         /*
 533                 next time d will be continued from the d from which the nearest
 534                 unsent block was found this time.
 535
 536                 This is because not necessarily any of the blocks found this
 537                 time are actually sent.
 538         */
 539         s32 new_nearest_unsent_d = -1;
 540
 541         s16 d_max = g_settings->getS16("max_block_send_distance");
 542         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 543
 544         // Don't loop very much at a time
 545         s16 max_d_increment_at_time = 2;
 546         if(d_max > d_start + max_d_increment_at_time)
 547                 d_max = d_start + max_d_increment_at_time;
 548         /*if(d_max_gen > d_start+2)
 549                 d_max_gen = d_start+2;*/
 550
 551         //infostream<<"Starting from "<<d_start<<std::endl;
 552
 553         s32 nearest_emerged_d = -1;
 554         s32 nearest_emergefull_d = -1;
 555         s32 nearest_sent_d = -1;
 556         bool queue_is_full = false;
 557
 558         s16 d;
 559         for(d = d_start; d <= d_max; d++)
 560         {
 561                 /*errorstream<<"checking d="<<d<<" for "
 562                                 <<server->getPlayerName(peer_id)<<std::endl;*/
 563                 //infostream<<"RemoteClient::SendBlocks(): d="<<d<<std::endl;
 564
 565                 /*
 566                         If m_nearest_unsent_d was changed by the EmergeThread
 567                         (it can change it to 0 through SetBlockNotSent),
 568                         update our d to it.
 569                         Else update m_nearest_unsent_d
 570                 */
 571                 /*if(m_nearest_unsent_d != last_nearest_unsent_d)
 572                 {
 573                         d = m_nearest_unsent_d;
 574                         last_nearest_unsent_d = m_nearest_unsent_d;
 575                 }*/
 576
 577                 /*
 578                         Get the border/face dot coordinates of a "d-radiused"
 579                         box
 580                 */
 581                 core::list<v3s16> list;
 582                 getFacePositions(list, d);
 583
 584                 core::list<v3s16>::Iterator li;
 585                 for(li=list.begin(); li!=list.end(); li++)
 586                 {
 587                         v3s16 p = *li + center;
 588
 589                         /*
 590                                 Send throttling
 591                                 - Don't allow too many simultaneous transfers
 592                                 - EXCEPT when the blocks are very close
 593
 594                                 Also, don't send blocks that are already flying.
 595                         */
 596
 597                         // Start with the usual maximum
 598                         u16 max_simul_dynamic = max_simul_sends_usually;
 599
 600                         // If block is very close, allow full maximum
 601                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 602                                 max_simul_dynamic = max_simul_sends_setting;
 603
 604                         // Don't select too many blocks for sending
 605                         if(num_blocks_selected >= max_simul_dynamic)
 606                         {
 607                                 queue_is_full = true;
 608                                 goto queue_full_break;
 609                         }
 610
 611                         // Don't send blocks that are currently being transferred
 612                         if(m_blocks_sending.find(p) != NULL)
 613                                 continue;
 614
 615                         /*
 616                                 Do not go over-limit
 617                         */
 618                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 619                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 620                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 621                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 622                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 623                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
 624                                 continue;
 625
 626                         // If this is true, inexistent block will be made from scratch
 627                         bool generate = d <= d_max_gen;
 628
 629                         {
 630                                 /*// Limit the generating area vertically to 2/3
 631                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 632                                         generate = false;*/
 633
 634                                 // Limit the send area vertically to 1/2
 635                                 if(abs(p.Y - center.Y) > d_max / 2)
 636                                         continue;
 637                         }
 638
 639 #if 0
 640                         /*
 641                                 If block is far away, don't generate it unless it is
 642                                 near ground level.
 643                         */
 644                         if(d >= 4)
 645                         {
 646         #if 1
 647                                 // Block center y in nodes
 648                                 f32 y = (f32)(p.Y * MAP_BLOCKSIZE + MAP_BLOCKSIZE/2);
 649                                 // Don't generate if it's very high or very low
 650                                 if(y < -64 || y > 64)
 651                                         generate = false;
 652         #endif
 653         #if 0
 654                                 v2s16 p2d_nodes_center(
 655                                         MAP_BLOCKSIZE*p.X,
 656                                         MAP_BLOCKSIZE*p.Z);
 657
 658                                 // Get ground height in nodes
 659                                 s16 gh = server->m_env->getServerMap().findGroundLevel(
 660                                                 p2d_nodes_center);
 661
 662                                 // If differs a lot, don't generate
 663                                 if(fabs(gh - y) > MAP_BLOCKSIZE*2)
 664                                         generate = false;
 665                                         // Actually, don't even send it
 666                                         //continue;
 667         #endif
 668                         }
 669 #endif
 670
 671                         //infostream<<"d="<<d<<std::endl;
 672 #if 1
 673                         /*
 674                                 Don't generate or send if not in sight
 675                                 FIXME This only works if the client uses a small enough
 676                                 FOV setting. The default of 72 degrees is fine.
 677                         */
 678
 679                         float camera_fov = (72.0*PI/180) * 4./3.;
 680                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 681                         {
 682                                 continue;
 683                         }
 684 #endif
 685                         /*
 686                                 Don't send already sent blocks
 687                         */
 688                         {
 689                                 if(m_blocks_sent.find(p) != NULL)
 690                                 {
 691                                         continue;
 692                                 }
 693                         }
 694
 695                         /*
 696                                 Check if map has this block
 697                         */
 698                         MapBlock *block = server->m_env->getMap().getBlockNoCreateNoEx(p);
 699
 700                         bool surely_not_found_on_disk = false;
 701                         bool block_is_invalid = false;
 702                         if(block != NULL)
 703                         {
 704                                 // Reset usage timer, this block will be of use in the future.
 705                                 block->resetUsageTimer();
 706
 707                                 // Block is dummy if data doesn't exist.
 708                                 // It means it has been not found from disk and not generated
 709                                 if(block->isDummy())
 710                                 {
 711                                         surely_not_found_on_disk = true;
 712                                 }
 713
 714                                 // Block is valid if lighting is up-to-date and data exists
 715                                 if(block->isValid() == false)
 716                                 {
 717                                         block_is_invalid = true;
 718                                 }
 719
 720                                 /*if(block->isFullyGenerated() == false)
 721                                 {
 722                                         block_is_invalid = true;
 723                                 }*/
 724
 725 #if 0
 726                                 v2s16 p2d(p.X, p.Z);
 727                                 ServerMap *map = (ServerMap*)(&server->m_env->getMap());
 728                                 v2s16 chunkpos = map->sector_to_chunk(p2d);
 729                                 if(map->chunkNonVolatile(chunkpos) == false)
 730                                         block_is_invalid = true;
 731 #endif
 732                                 if(block->isGenerated() == false)
 733                                         block_is_invalid = true;
 734 #if 1
 735                                 /*
 736                                         If block is not close, don't send it unless it is near
 737                                         ground level.
 738
 739                                         Block is near ground level if night-time mesh
 740                                         differs from day-time mesh.
 741                                 */
 742                                 if(d >= 4)
 743                                 {
 744                                         if(block->getDayNightDiff() == false)
 745                                                 continue;
 746                                 }
 747 #endif
 748                         }
 749
 750                         /*
 751                                 If block has been marked to not exist on disk (dummy)
 752                                 and generating new ones is not wanted, skip block.
 753                         */
 754                         if(generate == false && surely_not_found_on_disk == true)
 755                         {
 756                                 // get next one.
 757                                 continue;
 758                         }
 759
 760                         /*
 761                                 Add inexistent block to emerge queue.
 762                         */
 763                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 764                         {
 765                                 //TODO: Get value from somewhere
 766                                 // Allow only one block in emerge queue
 767                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
 768                                 // Allow two blocks in queue per client
 769                                 //if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
 770                                 u32 max_emerge = 5;
 771                                 // Make it more responsive when needing to generate stuff
 772                                 if(surely_not_found_on_disk)
 773                                         max_emerge = 1;
 774                                 if(server->m_emerge_queue.peerItemCount(peer_id) < max_emerge)
 775                                 {
 776                                         //infostream<<"Adding block to emerge queue"<<std::endl;
 777
 778                                         // Add it to the emerge queue and trigger the thread
 779
 780                                         u8 flags = 0;
 781                                         if(generate == false)
 782                                                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
 783
 784                                         server->m_emerge_queue.addBlock(peer_id, p, flags);
 785                                         server->m_emergethread.trigger();
 786
 787                                         if(nearest_emerged_d == -1)
 788                                                 nearest_emerged_d = d;
 789                                 } else {
 790                                         if(nearest_emergefull_d == -1)
 791                                                 nearest_emergefull_d = d;
 792                                 }
 793
 794                                 // get next one.
 795                                 continue;
 796                         }
 797
 798                         if(nearest_sent_d == -1)
 799                                 nearest_sent_d = d;
 800
 801                         /*
 802                                 Add block to send queue
 803                         */
 804
 805                         /*errorstream<<"sending from d="<<d<<" to "
 806                                         <<server->getPlayerName(peer_id)<<std::endl;*/
 807
 808                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 809
 810                         dest.push_back(q);
 811
 812                         num_blocks_selected += 1;
 813                 }
 814         }
 815 queue_full_break:
 816
 817         //infostream<<"Stopped at "<<d<<std::endl;
 818
 819         // If nothing was found for sending and nothing was queued for
 820         // emerging, continue next time browsing from here
 821         if(nearest_emerged_d != -1){
 822                 new_nearest_unsent_d = nearest_emerged_d;
 823         } else if(nearest_emergefull_d != -1){
 824                 new_nearest_unsent_d = nearest_emergefull_d;
 825         } else {
 826                 if(d > g_settings->getS16("max_block_send_distance")){
 827                         new_nearest_unsent_d = 0;
 828                         m_nothing_to_send_pause_timer = 2.0;
 829                         /*infostream<<"GetNextBlocks(): d wrapped around for "
 830                                         <<server->getPlayerName(peer_id)
 831                                         <<"; setting to 0 and pausing"<<std::endl;*/
 832                 } else {
 833                         if(nearest_sent_d != -1)
 834                                 new_nearest_unsent_d = nearest_sent_d;
 835                         else
 836                                 new_nearest_unsent_d = d;
 837                 }
 838         }
 839
 840         if(new_nearest_unsent_d != -1)
 841                 m_nearest_unsent_d = new_nearest_unsent_d;
 842
 843         /*timer_result = timer.stop(true);
 844         if(timer_result != 0)
 845                 infostream<<"GetNextBlocks duration: "<<timer_result<<" (!=0)"<<std::endl;*/
 846 }
 847
 848 void RemoteClient::GotBlock(v3s16 p)
 849 {
 850         if(m_blocks_sending.find(p) != NULL)
 851                 m_blocks_sending.remove(p);
 852         else
 853         {
 854                 /*infostream<<"RemoteClient::GotBlock(): Didn't find in"
 855                                 " m_blocks_sending"<<std::endl;*/
 856                 m_excess_gotblocks++;
 857         }
 858         m_blocks_sent.insert(p, true);
 859 }
 860
 861 void RemoteClient::SentBlock(v3s16 p)
 862 {
 863         if(m_blocks_sending.find(p) == NULL)
 864                 m_blocks_sending.insert(p, 0.0);
 865         else
 866                 infostream<<"RemoteClient::SentBlock(): Sent block"
 867                                 " already in m_blocks_sending"<<std::endl;
 868 }
 869
 870 void RemoteClient::SetBlockNotSent(v3s16 p)
 871 {
 872         m_nearest_unsent_d = 0;
 873
 874         if(m_blocks_sending.find(p) != NULL)
 875                 m_blocks_sending.remove(p);
 876         if(m_blocks_sent.find(p) != NULL)
 877                 m_blocks_sent.remove(p);
 878 }
 879
 880 void RemoteClient::SetBlocksNotSent(core::map<v3s16, MapBlock*> &blocks)
 881 {
 882         m_nearest_unsent_d = 0;
 883
 884         for(core::map<v3s16, MapBlock*>::Iterator
 885                         i = blocks.getIterator();
 886                         i.atEnd()==false; i++)
 887         {
 888                 v3s16 p = i.getNode()->getKey();
 889
 890                 if(m_blocks_sending.find(p) != NULL)
 891                         m_blocks_sending.remove(p);
 892                 if(m_blocks_sent.find(p) != NULL)
 893                         m_blocks_sent.remove(p);
 894         }
 895 }
 896
 897 /*
 898         PlayerInfo
 899 */
 900
 901 PlayerInfo::PlayerInfo()
 902 {
 903         name[0] = 0;
 904         avg_rtt = 0;
 905 }
 906
 907 void PlayerInfo::PrintLine(std::ostream *s)
 908 {
 909         (*s)<<id<<": ";
 910         (*s)<<"\""<<name<<"\" ("
 911                         <<(position.X/10)<<","<<(position.Y/10)
 912                         <<","<<(position.Z/10)<<") ";
 913         address.print(s);
 914         (*s)<<" avg_rtt="<<avg_rtt;
 915         (*s)<<std::endl;
 916 }
 917
 918 /*
 919         Server
 920 */
 921
 922 Server::Server(
 923                 const std::string &path_world,
 924                 const std::string &path_config,
 925                 const SubgameSpec &gamespec,
 926                 bool simple_singleplayer_mode
 927         ):
 928         m_path_world(path_world),
 929         m_path_config(path_config),
 930         m_gamespec(gamespec),
 931         m_simple_singleplayer_mode(simple_singleplayer_mode),
 932         m_async_fatal_error(""),
 933         m_env(NULL),
 934         m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
 935         m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
 936         m_lua(NULL),
 937         m_itemdef(createItemDefManager()),
 938         m_nodedef(createNodeDefManager()),
 939         m_craftdef(createCraftDefManager()),
 940         m_event(new EventManager()),
 941         m_thread(this),
 942         m_emergethread(this),
 943         m_time_of_day_send_timer(0),
 944         m_uptime(0),
 945         m_shutdown_requested(false),
 946         m_ignore_map_edit_events(false),
 947         m_ignore_map_edit_events_peer_id(0)
 948 {
 949         m_liquid_transform_timer = 0.0;
 950         m_print_info_timer = 0.0;
 951         m_objectdata_timer = 0.0;
 952         m_emergethread_trigger_timer = 0.0;
 953         m_savemap_timer = 0.0;
 954
 955         m_env_mutex.Init();
 956         m_con_mutex.Init();
 957         m_step_dtime_mutex.Init();
 958         m_step_dtime = 0.0;
 959
 960         if(path_world == "")
 961                 throw ServerError("Supplied empty world path");
 962
 963         if(!gamespec.isValid())
 964                 throw ServerError("Supplied invalid gamespec");
 965
 966         infostream<<"Server created for gameid \""<<m_gamespec.id<<"\"";
 967         if(m_simple_singleplayer_mode)
 968                 infostream<<" in simple singleplayer mode"<<std::endl;
 969         else
 970                 infostream<<std::endl;
 971         infostream<<"- world:  "<<m_path_world<<std::endl;
 972         infostream<<"- config: "<<m_path_config<<std::endl;
 973         infostream<<"- game:   "<<m_gamespec.path<<std::endl;
 974
 975         // Add world mod search path
 976         m_modspaths.push_front(m_path_world + DIR_DELIM + "worldmods");
 977         // Add addon mod search path
 978         for(std::set<std::string>::const_iterator i = m_gamespec.mods_paths.begin();
 979                         i != m_gamespec.mods_paths.end(); i++)
 980                 m_modspaths.push_front((*i));
 981
 982         // Print out mod search paths
 983         for(core::list<std::string>::Iterator i = m_modspaths.begin();
 984                         i != m_modspaths.end(); i++){
 985                 std::string modspath = *i;
 986                 infostream<<"- mods:   "<<modspath<<std::endl;
 987         }
 988
 989         // Path to builtin.lua
 990         std::string builtinpath = getBuiltinLuaPath() + DIR_DELIM + "builtin.lua";
 991
 992         // Create world if it doesn't exist
 993         if(!initializeWorld(m_path_world, m_gamespec.id))
 994                 throw ServerError("Failed to initialize world");
 995
 996         // Lock environment
 997         JMutexAutoLock envlock(m_env_mutex);
 998         JMutexAutoLock conlock(m_con_mutex);
 999
1000         // Initialize scripting
1001
1002         infostream<<"Server: Initializing Lua"<<std::endl;
1003         m_lua = script_init();
1004         assert(m_lua);
1005         // Export API
1006         scriptapi_export(m_lua, this);
1007         // Load and run builtin.lua
1008         infostream<<"Server: Loading builtin.lua [\""
1009                         <<builtinpath<<"\"]"<<std::endl;
1010         bool success = scriptapi_loadmod(m_lua, builtinpath, "__builtin");
1011         if(!success){
1012                 errorstream<<"Server: Failed to load and run "
1013                                 <<builtinpath<<std::endl;
1014                 throw ModError("Failed to load and run "+builtinpath);
1015         }
1016         // Find mods in mod search paths
1017         m_mods = getMods(m_modspaths);
1018         // Print 'em
1019         infostream<<"Server: Loading mods: ";
1020         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1021                         i != m_mods.end(); i++){
1022                 const ModSpec &mod = *i;
1023                 infostream<<mod.name<<" ";
1024         }
1025         infostream<<std::endl;
1026         // Load and run "mod" scripts
1027         for(core::list<ModSpec>::Iterator i = m_mods.begin();
1028                         i != m_mods.end(); i++){
1029                 const ModSpec &mod = *i;
1030                 std::string scriptpath = mod.path + DIR_DELIM + "init.lua";
1031                 infostream<<"  ["<<padStringRight(mod.name, 12)<<"] [\""
1032                                 <<scriptpath<<"\"]"<<std::endl;
1033                 bool success = scriptapi_loadmod(m_lua, scriptpath, mod.name);
1034                 if(!success){
1035                         errorstream<<"Server: Failed to load and run "
1036                                         <<scriptpath<<std::endl;
1037                         throw ModError("Failed to load and run "+scriptpath);
1038                 }
1039         }
1040
1041         // Read Textures and calculate sha1 sums
1042         fillMediaCache();
1043
1044         // Apply item aliases in the node definition manager
1045         m_nodedef->updateAliases(m_itemdef);
1046
1047         // Initialize Environment
1048
1049         m_env = new ServerEnvironment(new ServerMap(path_world, this), m_lua,
1050                         this, this);
1051
1052         // Give environment reference to scripting api
1053         scriptapi_add_environment(m_lua, m_env);
1054
1055         // Register us to receive map edit events
1056         m_env->getMap().addEventReceiver(this);
1057
1058         // If file exists, load environment metadata
1059         if(fs::PathExists(m_path_world+DIR_DELIM+"env_meta.txt"))
1060         {
1061                 infostream<<"Server: Loading environment metadata"<<std::endl;
1062                 m_env->loadMeta(m_path_world);
1063         }
1064
1065         // Load players
1066         infostream<<"Server: Loading players"<<std::endl;
1067         m_env->deSerializePlayers(m_path_world);
1068
1069         /*
1070                 Add some test ActiveBlockModifiers to environment
1071         */
1072         add_legacy_abms(m_env, m_nodedef);
1073 }
1074
1075 Server::~Server()
1076 {
1077         infostream<<"Server destructing"<<std::endl;
1078
1079         /*
1080                 Send shutdown message
1081         */
1082         {
1083                 JMutexAutoLock conlock(m_con_mutex);
1084
1085                 std::wstring line = L"*** Server shutting down";
1086
1087                 /*
1088                         Send the message to clients
1089                 */
1090                 for(core::map<u16, RemoteClient*>::Iterator
1091                         i = m_clients.getIterator();
1092                         i.atEnd() == false; i++)
1093                 {
1094                         // Get client and check that it is valid
1095                         RemoteClient *client = i.getNode()->getValue();
1096                         assert(client->peer_id == i.getNode()->getKey());
1097                         if(client->serialization_version == SER_FMT_VER_INVALID)
1098                                 continue;
1099
1100                         try{
1101                                 SendChatMessage(client->peer_id, line);
1102                         }
1103                         catch(con::PeerNotFoundException &e)
1104                         {}
1105                 }
1106         }
1107
1108         {
1109                 JMutexAutoLock envlock(m_env_mutex);
1110
1111                 /*
1112                         Save players
1113                 */
1114                 infostream<<"Server: Saving players"<<std::endl;
1115                 m_env->serializePlayers(m_path_world);
1116
1117                 /*
1118                         Save environment metadata
1119                 */
1120                 infostream<<"Server: Saving environment metadata"<<std::endl;
1121                 m_env->saveMeta(m_path_world);
1122         }
1123
1124         /*
1125                 Stop threads
1126         */
1127         stop();
1128
1129         /*
1130                 Delete clients
1131         */
1132         {
1133                 JMutexAutoLock clientslock(m_con_mutex);
1134
1135                 for(core::map<u16, RemoteClient*>::Iterator
1136                         i = m_clients.getIterator();
1137                         i.atEnd() == false; i++)
1138                 {
1139                         /*// Delete player
1140                         // NOTE: These are removed by env destructor
1141                         {
1142                                 u16 peer_id = i.getNode()->getKey();
1143                                 JMutexAutoLock envlock(m_env_mutex);
1144                                 m_env->removePlayer(peer_id);
1145                         }*/
1146
1147                         // Delete client
1148                         delete i.getNode()->getValue();
1149                 }
1150         }
1151
1152         // Delete things in the reverse order of creation
1153         delete m_env;
1154         delete m_event;
1155         delete m_itemdef;
1156         delete m_nodedef;
1157         delete m_craftdef;
1158
1159         // Deinitialize scripting
1160         infostream<<"Server: Deinitializing scripting"<<std::endl;
1161         script_deinit(m_lua);
1162 }
1163
1164 void Server::start(unsigned short port)
1165 {
1166         DSTACK(__FUNCTION_NAME);
1167         infostream<<"Starting server on port "<<port<<"..."<<std::endl;
1168
1169         // Stop thread if already running
1170         m_thread.stop();
1171
1172         // Initialize connection
1173         m_con.SetTimeoutMs(30);
1174         m_con.Serve(port);
1175
1176         // Start thread
1177         m_thread.setRun(true);
1178         m_thread.Start();
1179
1180         // ASCII art for the win!
1181         actionstream
1182         <<"        .__               __                   __   "<<std::endl
1183         <<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
1184         <<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
1185         <<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
1186         <<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
1187         <<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl;
1188         actionstream<<"World at ["<<m_path_world<<"]"<<std::endl;
1189         actionstream<<"Server for gameid=\""<<m_gamespec.id
1190                         <<"\" listening on port "<<port<<"."<<std::endl;
1191 }
1192
1193 void Server::stop()
1194 {
1195         DSTACK(__FUNCTION_NAME);
1196
1197         infostream<<"Server: Stopping and waiting threads"<<std::endl;
1198
1199         // Stop threads (set run=false first so both start stopping)
1200         m_thread.setRun(false);
1201         m_emergethread.setRun(false);
1202         m_thread.stop();
1203         m_emergethread.stop();
1204
1205         infostream<<"Server: Threads stopped"<<std::endl;
1206 }
1207
1208 void Server::step(float dtime)
1209 {
1210         DSTACK(__FUNCTION_NAME);
1211         // Limit a bit
1212         if(dtime > 2.0)
1213                 dtime = 2.0;
1214         {
1215                 JMutexAutoLock lock(m_step_dtime_mutex);
1216                 m_step_dtime += dtime;
1217         }
1218         // Throw if fatal error occurred in thread
1219         std::string async_err = m_async_fatal_error.get();
1220         if(async_err != ""){
1221                 throw ServerError(async_err);
1222         }
1223 }
1224
1225 void Server::AsyncRunStep()
1226 {
1227         DSTACK(__FUNCTION_NAME);
1228
1229         g_profiler->add("Server::AsyncRunStep (num)", 1);
1230
1231         float dtime;
1232         {
1233                 JMutexAutoLock lock1(m_step_dtime_mutex);
1234                 dtime = m_step_dtime;
1235         }
1236
1237         {
1238                 // Send blocks to clients
1239                 SendBlocks(dtime);
1240         }
1241
1242         if(dtime < 0.001)
1243                 return;
1244
1245         g_profiler->add("Server::AsyncRunStep with dtime (num)", 1);
1246
1247         //infostream<<"Server steps "<<dtime<<std::endl;
1248         //infostream<<"Server::AsyncRunStep(): dtime="<<dtime<<std::endl;
1249
1250         {
1251                 JMutexAutoLock lock1(m_step_dtime_mutex);
1252                 m_step_dtime -= dtime;
1253         }
1254
1255         /*
1256                 Update uptime
1257         */
1258         {
1259                 m_uptime.set(m_uptime.get() + dtime);
1260         }
1261
1262         {
1263                 // Process connection's timeouts
1264                 JMutexAutoLock lock2(m_con_mutex);
1265                 ScopeProfiler sp(g_profiler, "Server: connection timeout processing");
1266                 m_con.RunTimeouts(dtime);
1267         }
1268
1269         {
1270                 // This has to be called so that the client list gets synced
1271                 // with the peer list of the connection
1272                 handlePeerChanges();
1273         }
1274
1275         /*
1276                 Update time of day and overall game time
1277         */
1278         {
1279                 JMutexAutoLock envlock(m_env_mutex);
1280
1281                 m_env->setTimeOfDaySpeed(g_settings->getFloat("time_speed"));
1282
1283                 /*
1284                         Send to clients at constant intervals
1285                 */
1286
1287                 m_time_of_day_send_timer -= dtime;
1288                 if(m_time_of_day_send_timer < 0.0)
1289                 {
1290                         m_time_of_day_send_timer = g_settings->getFloat("time_send_interval");
1291
1292                         //JMutexAutoLock envlock(m_env_mutex);
1293                         JMutexAutoLock conlock(m_con_mutex);
1294
1295                         for(core::map<u16, RemoteClient*>::Iterator
1296                                 i = m_clients.getIterator();
1297                                 i.atEnd() == false; i++)
1298                         {
1299                                 RemoteClient *client = i.getNode()->getValue();
1300                                 SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
1301                                                 m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
1302                                 // Send as reliable
1303                                 m_con.Send(client->peer_id, 0, data, true);
1304                         }
1305                 }
1306         }
1307
1308         {
1309                 JMutexAutoLock lock(m_env_mutex);
1310                 // Step environment
1311                 ScopeProfiler sp(g_profiler, "SEnv step");
1312                 ScopeProfiler sp2(g_profiler, "SEnv step avg", SPT_AVG);
1313                 m_env->step(dtime);
1314         }
1315
1316         const float map_timer_and_unload_dtime = 2.92;
1317         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime))
1318         {
1319                 JMutexAutoLock lock(m_env_mutex);
1320                 // Run Map's timers and unload unused data
1321                 ScopeProfiler sp(g_profiler, "Server: map timer and unload");
1322                 m_env->getMap().timerUpdate(map_timer_and_unload_dtime,
1323                                 g_settings->getFloat("server_unload_unused_data_timeout"));
1324         }
1325
1326         /*
1327                 Do background stuff
1328         */
1329
1330         /*
1331                 Handle players
1332         */
1333         {
1334                 JMutexAutoLock lock(m_env_mutex);
1335                 JMutexAutoLock lock2(m_con_mutex);
1336
1337                 ScopeProfiler sp(g_profiler, "Server: handle players");
1338
1339                 for(core::map<u16, RemoteClient*>::Iterator
1340                         i = m_clients.getIterator();
1341                         i.atEnd() == false; i++)
1342                 {
1343                         RemoteClient *client = i.getNode()->getValue();
1344                         PlayerSAO *playersao = getPlayerSAO(client->peer_id);
1345                         if(playersao == NULL)
1346                                 continue;
1347
1348                         /*
1349                                 Handle player HPs (die if hp=0)
1350                         */
1351                         if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
1352                                 DiePlayer(client->peer_id);
1353
1354                         /*
1355                                 Send player inventories and HPs if necessary
1356                         */
1357                         if(playersao->m_teleported){
1358                                 SendMovePlayer(client->peer_id);
1359                                 playersao->m_teleported = false;
1360                         }
1361                         if(playersao->m_inventory_not_sent){
1362                                 UpdateCrafting(client->peer_id);
1363                                 SendInventory(client->peer_id);
1364                         }
1365                         if(playersao->m_hp_not_sent){
1366                                 SendPlayerHP(client->peer_id);
1367                         }
1368                 }
1369         }
1370
1371         /* Transform liquids */
1372         m_liquid_transform_timer += dtime;
1373         if(m_liquid_transform_timer >= 1.00)
1374         {
1375                 m_liquid_transform_timer -= 1.00;
1376
1377                 JMutexAutoLock lock(m_env_mutex);
1378
1379                 ScopeProfiler sp(g_profiler, "Server: liquid transform");
1380
1381                 core::map<v3s16, MapBlock*> modified_blocks;
1382                 m_env->getMap().transformLiquids(modified_blocks);
1383 #if 0
1384                 /*
1385                         Update lighting
1386                 */
1387                 core::map<v3s16, MapBlock*> lighting_modified_blocks;
1388                 ServerMap &map = ((ServerMap&)m_env->getMap());
1389                 map.updateLighting(modified_blocks, lighting_modified_blocks);
1390
1391                 // Add blocks modified by lighting to modified_blocks
1392                 for(core::map<v3s16, MapBlock*>::Iterator
1393                                 i = lighting_modified_blocks.getIterator();
1394                                 i.atEnd() == false; i++)
1395                 {
1396                         MapBlock *block = i.getNode()->getValue();
1397                         modified_blocks.insert(block->getPos(), block);
1398                 }
1399 #endif
1400                 /*
1401                         Set the modified blocks unsent for all the clients
1402                 */
1403
1404                 JMutexAutoLock lock2(m_con_mutex);
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
1412                         if(modified_blocks.size() > 0)
1413                         {
1414                                 // Remove block from sent history
1415                                 client->SetBlocksNotSent(modified_blocks);
1416                         }
1417                 }
1418         }
1419
1420         // Periodically print some info
1421         {
1422                 float &counter = m_print_info_timer;
1423                 counter += dtime;
1424                 if(counter >= 30.0)
1425                 {
1426                         counter = 0.0;
1427
1428                         JMutexAutoLock lock2(m_con_mutex);
1429
1430                         if(m_clients.size() != 0)
1431                                 infostream<<"Players:"<<std::endl;
1432                         for(core::map<u16, RemoteClient*>::Iterator
1433                                 i = m_clients.getIterator();
1434                                 i.atEnd() == false; i++)
1435                         {
1436                                 //u16 peer_id = i.getNode()->getKey();
1437                                 RemoteClient *client = i.getNode()->getValue();
1438                                 Player *player = m_env->getPlayer(client->peer_id);
1439                                 if(player==NULL)
1440                                         continue;
1441                                 infostream<<"* "<<player->getName()<<"\t";
1442                                 client->PrintInfo(infostream);
1443                         }
1444                 }
1445         }
1446
1447         //if(g_settings->getBool("enable_experimental"))
1448         {
1449
1450         /*
1451                 Check added and deleted active objects
1452         */
1453         {
1454                 //infostream<<"Server: Checking added and deleted active objects"<<std::endl;
1455                 JMutexAutoLock envlock(m_env_mutex);
1456                 JMutexAutoLock conlock(m_con_mutex);
1457
1458                 ScopeProfiler sp(g_profiler, "Server: checking added and deleted objs");
1459
1460                 // Radius inside which objects are active
1461                 s16 radius = g_settings->getS16("active_object_send_range_blocks");
1462                 radius *= MAP_BLOCKSIZE;
1463
1464                 for(core::map<u16, RemoteClient*>::Iterator
1465                         i = m_clients.getIterator();
1466                         i.atEnd() == false; i++)
1467                 {
1468                         RemoteClient *client = i.getNode()->getValue();
1469
1470                         // If definitions and textures have not been sent, don't
1471                         // send objects either
1472                         if(!client->definitions_sent)
1473                                 continue;
1474
1475                         Player *player = m_env->getPlayer(client->peer_id);
1476                         if(player==NULL)
1477                         {
1478                                 // This can happen if the client timeouts somehow
1479                                 /*infostream<<"WARNING: "<<__FUNCTION_NAME<<": Client "
1480                                                 <<client->peer_id
1481                                                 <<" has no associated player"<<std::endl;*/
1482                                 continue;
1483                         }
1484                         v3s16 pos = floatToInt(player->getPosition(), BS);
1485
1486                         core::map<u16, bool> removed_objects;
1487                         core::map<u16, bool> added_objects;
1488                         m_env->getRemovedActiveObjects(pos, radius,
1489                                         client->m_known_objects, removed_objects);
1490                         m_env->getAddedActiveObjects(pos, radius,
1491                                         client->m_known_objects, added_objects);
1492
1493                         // Ignore if nothing happened
1494                         if(removed_objects.size() == 0 && added_objects.size() == 0)
1495                         {
1496                                 //infostream<<"active objects: none changed"<<std::endl;
1497                                 continue;
1498                         }
1499
1500                         std::string data_buffer;
1501
1502                         char buf[4];
1503
1504                         // Handle removed objects
1505                         writeU16((u8*)buf, removed_objects.size());
1506                         data_buffer.append(buf, 2);
1507                         for(core::map<u16, bool>::Iterator
1508                                         i = removed_objects.getIterator();
1509                                         i.atEnd()==false; i++)
1510                         {
1511                                 // Get object
1512                                 u16 id = i.getNode()->getKey();
1513                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1514
1515                                 // Add to data buffer for sending
1516                                 writeU16((u8*)buf, i.getNode()->getKey());
1517                                 data_buffer.append(buf, 2);
1518
1519                                 // Remove from known objects
1520                                 client->m_known_objects.remove(i.getNode()->getKey());
1521
1522                                 if(obj && obj->m_known_by_count > 0)
1523                                         obj->m_known_by_count--;
1524                         }
1525
1526                         // Handle added objects
1527                         writeU16((u8*)buf, added_objects.size());
1528                         data_buffer.append(buf, 2);
1529                         for(core::map<u16, bool>::Iterator
1530                                         i = added_objects.getIterator();
1531                                         i.atEnd()==false; i++)
1532                         {
1533                                 // Get object
1534                                 u16 id = i.getNode()->getKey();
1535                                 ServerActiveObject* obj = m_env->getActiveObject(id);
1536
1537                                 // Get object type
1538                                 u8 type = ACTIVEOBJECT_TYPE_INVALID;
1539                                 if(obj == NULL)
1540                                         infostream<<"WARNING: "<<__FUNCTION_NAME
1541                                                         <<": NULL object"<<std::endl;
1542                                 else
1543                                         type = obj->getSendType();
1544
1545                                 // Add to data buffer for sending
1546                                 writeU16((u8*)buf, id);
1547                                 data_buffer.append(buf, 2);
1548                                 writeU8((u8*)buf, type);
1549                                 data_buffer.append(buf, 1);
1550
1551                                 if(obj)
1552                                         data_buffer.append(serializeLongString(
1553                                                         obj->getClientInitializationData()));
1554                                 else
1555                                         data_buffer.append(serializeLongString(""));
1556
1557                                 // Add to known objects
1558                                 client->m_known_objects.insert(i.getNode()->getKey(), false);
1559
1560                                 if(obj)
1561                                         obj->m_known_by_count++;
1562                         }
1563
1564                         // Send packet
1565                         SharedBuffer<u8> reply(2 + data_buffer.size());
1566                         writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD);
1567                         memcpy((char*)&reply[2], data_buffer.c_str(),
1568                                         data_buffer.size());
1569                         // Send as reliable
1570                         m_con.Send(client->peer_id, 0, reply, true);
1571
1572                         verbosestream<<"Server: Sent object remove/add: "
1573                                         <<removed_objects.size()<<" removed, "
1574                                         <<added_objects.size()<<" added, "
1575                                         <<"packet size is "<<reply.getSize()<<std::endl;
1576                 }
1577
1578 #if 0
1579                 /*
1580                         Collect a list of all the objects known by the clients
1581                         and report it back to the environment.
1582                 */
1583
1584                 core::map<u16, bool> all_known_objects;
1585
1586                 for(core::map<u16, RemoteClient*>::Iterator
1587                         i = m_clients.getIterator();
1588                         i.atEnd() == false; i++)
1589                 {
1590                         RemoteClient *client = i.getNode()->getValue();
1591                         // Go through all known objects of client
1592                         for(core::map<u16, bool>::Iterator
1593                                         i = client->m_known_objects.getIterator();
1594                                         i.atEnd()==false; i++)
1595                         {
1596                                 u16 id = i.getNode()->getKey();
1597                                 all_known_objects[id] = true;
1598                         }
1599                 }
1600
1601                 m_env->setKnownActiveObjects(whatever);
1602 #endif
1603
1604         }
1605
1606         /*
1607                 Send object messages
1608         */
1609         {
1610                 JMutexAutoLock envlock(m_env_mutex);
1611                 JMutexAutoLock conlock(m_con_mutex);
1612
1613                 ScopeProfiler sp(g_profiler, "Server: sending object messages");
1614
1615                 // Key = object id
1616                 // Value = data sent by object
1617                 core::map<u16, core::list<ActiveObjectMessage>* > buffered_messages;
1618
1619                 // Get active object messages from environment
1620                 for(;;)
1621                 {
1622                         ActiveObjectMessage aom = m_env->getActiveObjectMessage();
1623                         if(aom.id == 0)
1624                                 break;
1625
1626                         core::list<ActiveObjectMessage>* message_list = NULL;
1627                         core::map<u16, core::list<ActiveObjectMessage>* >::Node *n;
1628                         n = buffered_messages.find(aom.id);
1629                         if(n == NULL)
1630                         {
1631                                 message_list = new core::list<ActiveObjectMessage>;
1632                                 buffered_messages.insert(aom.id, message_list);
1633                         }
1634                         else
1635                         {
1636                                 message_list = n->getValue();
1637                         }
1638                         message_list->push_back(aom);
1639                 }
1640
1641                 // Route data to every client
1642                 for(core::map<u16, RemoteClient*>::Iterator
1643                         i = m_clients.getIterator();
1644                         i.atEnd()==false; i++)
1645                 {
1646                         RemoteClient *client = i.getNode()->getValue();
1647                         std::string reliable_data;
1648                         std::string unreliable_data;
1649                         // Go through all objects in message buffer
1650                         for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1651                                         j = buffered_messages.getIterator();
1652                                         j.atEnd()==false; j++)
1653                         {
1654                                 // If object is not known by client, skip it
1655                                 u16 id = j.getNode()->getKey();
1656                                 if(client->m_known_objects.find(id) == NULL)
1657                                         continue;
1658                                 // Get message list of object
1659                                 core::list<ActiveObjectMessage>* list = j.getNode()->getValue();
1660                                 // Go through every message
1661                                 for(core::list<ActiveObjectMessage>::Iterator
1662                                                 k = list->begin(); k != list->end(); k++)
1663                                 {
1664                                         // Compose the full new data with header
1665                                         ActiveObjectMessage aom = *k;
1666                                         std::string new_data;
1667                                         // Add object id
1668                                         char buf[2];
1669                                         writeU16((u8*)&buf[0], aom.id);
1670                                         new_data.append(buf, 2);
1671                                         // Add data
1672                                         new_data += serializeString(aom.datastring);
1673                                         // Add data to buffer
1674                                         if(aom.reliable)
1675                                                 reliable_data += new_data;
1676                                         else
1677                                                 unreliable_data += new_data;
1678                                 }
1679                         }
1680                         /*
1681                                 reliable_data and unreliable_data are now ready.
1682                                 Send them.
1683                         */
1684                         if(reliable_data.size() > 0)
1685                         {
1686                                 SharedBuffer<u8> reply(2 + reliable_data.size());
1687                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1688                                 memcpy((char*)&reply[2], reliable_data.c_str(),
1689                                                 reliable_data.size());
1690                                 // Send as reliable
1691                                 m_con.Send(client->peer_id, 0, reply, true);
1692                         }
1693                         if(unreliable_data.size() > 0)
1694                         {
1695                                 SharedBuffer<u8> reply(2 + unreliable_data.size());
1696                                 writeU16(&reply[0], TOCLIENT_ACTIVE_OBJECT_MESSAGES);
1697                                 memcpy((char*)&reply[2], unreliable_data.c_str(),
1698                                                 unreliable_data.size());
1699                                 // Send as unreliable
1700                                 m_con.Send(client->peer_id, 0, reply, false);
1701                         }
1702
1703                         /*if(reliable_data.size() > 0 || unreliable_data.size() > 0)
1704                         {
1705                                 infostream<<"Server: Size of object message data: "
1706                                                 <<"reliable: "<<reliable_data.size()
1707                                                 <<", unreliable: "<<unreliable_data.size()
1708                                                 <<std::endl;
1709                         }*/
1710                 }
1711
1712                 // Clear buffered_messages
1713                 for(core::map<u16, core::list<ActiveObjectMessage>* >::Iterator
1714                                 i = buffered_messages.getIterator();
1715                                 i.atEnd()==false; i++)
1716                 {
1717                         delete i.getNode()->getValue();
1718                 }
1719         }
1720
1721         } // enable_experimental
1722
1723         /*
1724                 Send queued-for-sending map edit events.
1725         */
1726         {
1727                 // We will be accessing the environment and the connection
1728                 JMutexAutoLock lock(m_env_mutex);
1729                 JMutexAutoLock conlock(m_con_mutex);
1730
1731                 // Don't send too many at a time
1732                 //u32 count = 0;
1733
1734                 // Single change sending is disabled if queue size is not small
1735                 bool disable_single_change_sending = false;
1736                 if(m_unsent_map_edit_queue.size() >= 4)
1737                         disable_single_change_sending = true;
1738
1739                 int event_count = m_unsent_map_edit_queue.size();
1740
1741                 // We'll log the amount of each
1742                 Profiler prof;
1743
1744                 while(m_unsent_map_edit_queue.size() != 0)
1745                 {
1746                         MapEditEvent* event = m_unsent_map_edit_queue.pop_front();
1747
1748                         // Players far away from the change are stored here.
1749                         // Instead of sending the changes, MapBlocks are set not sent
1750                         // for them.
1751                         core::list<u16> far_players;
1752
1753                         if(event->type == MEET_ADDNODE)
1754                         {
1755                                 //infostream<<"Server: MEET_ADDNODE"<<std::endl;
1756                                 prof.add("MEET_ADDNODE", 1);
1757                                 if(disable_single_change_sending)
1758                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1759                                                         &far_players, 5);
1760                                 else
1761                                         sendAddNode(event->p, event->n, event->already_known_by_peer,
1762                                                         &far_players, 30);
1763                         }
1764                         else if(event->type == MEET_REMOVENODE)
1765                         {
1766                                 //infostream<<"Server: MEET_REMOVENODE"<<std::endl;
1767                                 prof.add("MEET_REMOVENODE", 1);
1768                                 if(disable_single_change_sending)
1769                                         sendRemoveNode(event->p, event->already_known_by_peer,
1770                                                         &far_players, 5);
1771                                 else
1772                                         sendRemoveNode(event->p, event->already_known_by_peer,
1773                                                         &far_players, 30);
1774                         }
1775                         else if(event->type == MEET_BLOCK_NODE_METADATA_CHANGED)
1776                         {
1777                                 infostream<<"Server: MEET_BLOCK_NODE_METADATA_CHANGED"<<std::endl;
1778                                 prof.add("MEET_BLOCK_NODE_METADATA_CHANGED", 1);
1779                                 setBlockNotSent(event->p);
1780                         }
1781                         else if(event->type == MEET_OTHER)
1782                         {
1783                                 infostream<<"Server: MEET_OTHER"<<std::endl;
1784                                 prof.add("MEET_OTHER", 1);
1785                                 for(core::map<v3s16, bool>::Iterator
1786                                                 i = event->modified_blocks.getIterator();
1787                                                 i.atEnd()==false; i++)
1788                                 {
1789                                         v3s16 p = i.getNode()->getKey();
1790                                         setBlockNotSent(p);
1791                                 }
1792                         }
1793                         else
1794                         {
1795                                 prof.add("unknown", 1);
1796                                 infostream<<"WARNING: Server: Unknown MapEditEvent "
1797                                                 <<((u32)event->type)<<std::endl;
1798                         }
1799
1800                         /*
1801                                 Set blocks not sent to far players
1802                         */
1803                         if(far_players.size() > 0)
1804                         {
1805                                 // Convert list format to that wanted by SetBlocksNotSent
1806                                 core::map<v3s16, MapBlock*> modified_blocks2;
1807                                 for(core::map<v3s16, bool>::Iterator
1808                                                 i = event->modified_blocks.getIterator();
1809                                                 i.atEnd()==false; i++)
1810                                 {
1811                                         v3s16 p = i.getNode()->getKey();
1812                                         modified_blocks2.insert(p,
1813                                                         m_env->getMap().getBlockNoCreateNoEx(p));
1814                                 }
1815                                 // Set blocks not sent
1816                                 for(core::list<u16>::Iterator
1817                                                 i = far_players.begin();
1818                                                 i != far_players.end(); i++)
1819                                 {
1820                                         u16 peer_id = *i;
1821                                         RemoteClient *client = getClient(peer_id);
1822                                         if(client==NULL)
1823                                                 continue;
1824                                         client->SetBlocksNotSent(modified_blocks2);
1825                                 }
1826                         }
1827
1828                         delete event;
1829
1830                         /*// Don't send too many at a time
1831                         count++;
1832                         if(count >= 1 && m_unsent_map_edit_queue.size() < 100)
1833                                 break;*/
1834                 }
1835
1836                 if(event_count >= 5){
1837                         infostream<<"Server: MapEditEvents:"<<std::endl;
1838                         prof.print(infostream);
1839                 } else if(event_count != 0){
1840                         verbosestream<<"Server: MapEditEvents:"<<std::endl;
1841                         prof.print(verbosestream);
1842                 }
1843
1844         }
1845
1846         /*
1847                 Trigger emergethread (it somehow gets to a non-triggered but
1848                 bysy state sometimes)
1849         */
1850         {
1851                 float &counter = m_emergethread_trigger_timer;
1852                 counter += dtime;
1853                 if(counter >= 2.0)
1854                 {
1855                         counter = 0.0;
1856
1857                         m_emergethread.trigger();
1858                 }
1859         }
1860
1861         // Save map, players and auth stuff
1862         {
1863                 float &counter = m_savemap_timer;
1864                 counter += dtime;
1865                 if(counter >= g_settings->getFloat("server_map_save_interval"))
1866                 {
1867                         counter = 0.0;
1868                         JMutexAutoLock lock(m_env_mutex);
1869
1870                         ScopeProfiler sp(g_profiler, "Server: saving stuff");
1871
1872                         //Ban stuff
1873                         if(m_banmanager.isModified())
1874                                 m_banmanager.save();
1875
1876                         // Save changed parts of map
1877                         m_env->getMap().save(MOD_STATE_WRITE_NEEDED);
1878
1879                         // Save players
1880                         m_env->serializePlayers(m_path_world);
1881
1882                         // Save environment metadata
1883                         m_env->saveMeta(m_path_world);
1884                 }
1885         }
1886 }
1887
1888 void Server::Receive()
1889 {
1890         DSTACK(__FUNCTION_NAME);
1891         SharedBuffer<u8> data;
1892         u16 peer_id;
1893         u32 datasize;
1894         try{
1895                 {
1896                         JMutexAutoLock conlock(m_con_mutex);
1897                         datasize = m_con.Receive(peer_id, data);
1898                 }
1899
1900                 // This has to be called so that the client list gets synced
1901                 // with the peer list of the connection
1902                 handlePeerChanges();
1903
1904                 ProcessData(*data, datasize, peer_id);
1905         }
1906         catch(con::InvalidIncomingDataException &e)
1907         {
1908                 infostream<<"Server::Receive(): "
1909                                 "InvalidIncomingDataException: what()="
1910                                 <<e.what()<<std::endl;
1911         }
1912         catch(con::PeerNotFoundException &e)
1913         {
1914                 //NOTE: This is not needed anymore
1915
1916                 // The peer has been disconnected.
1917                 // Find the associated player and remove it.
1918
1919                 /*JMutexAutoLock envlock(m_env_mutex);
1920
1921                 infostream<<"ServerThread: peer_id="<<peer_id
1922                                 <<" has apparently closed connection. "
1923                                 <<"Removing player."<<std::endl;
1924
1925                 m_env->removePlayer(peer_id);*/
1926         }
1927 }
1928
1929 void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
1930 {
1931         DSTACK(__FUNCTION_NAME);
1932         // Environment is locked first.
1933         JMutexAutoLock envlock(m_env_mutex);
1934         JMutexAutoLock conlock(m_con_mutex);
1935
1936         ScopeProfiler sp(g_profiler, "Server::ProcessData");
1937
1938         try{
1939                 Address address = m_con.GetPeerAddress(peer_id);
1940                 std::string addr_s = address.serializeString();
1941
1942                 // drop player if is ip is banned
1943                 if(m_banmanager.isIpBanned(addr_s)){
1944                         infostream<<"Server: A banned client tried to connect from "
1945                                         <<addr_s<<"; banned name was "
1946                                         <<m_banmanager.getBanName(addr_s)<<std::endl;
1947                         // This actually doesn't seem to transfer to the client
1948                         SendAccessDenied(m_con, peer_id,
1949                                         L"Your ip is banned. Banned name was "
1950                                         +narrow_to_wide(m_banmanager.getBanName(addr_s)));
1951                         m_con.DeletePeer(peer_id);
1952                         return;
1953                 }
1954         }
1955         catch(con::PeerNotFoundException &e)
1956         {
1957                 infostream<<"Server::ProcessData(): Cancelling: peer "
1958                                 <<peer_id<<" not found"<<std::endl;
1959                 return;
1960         }
1961
1962         std::string addr_s = m_con.GetPeerAddress(peer_id).serializeString();
1963
1964         u8 peer_ser_ver = getClient(peer_id)->serialization_version;
1965
1966         try
1967         {
1968
1969         if(datasize < 2)
1970                 return;
1971
1972         ToServerCommand command = (ToServerCommand)readU16(&data[0]);
1973
1974         if(command == TOSERVER_INIT)
1975         {
1976                 // [0] u16 TOSERVER_INIT
1977                 // [2] u8 SER_FMT_VER_HIGHEST
1978                 // [3] u8[20] player_name
1979                 // [23] u8[28] password <--- can be sent without this, from old versions
1980
1981                 if(datasize < 2+1+PLAYERNAME_SIZE)
1982                         return;
1983
1984                 verbosestream<<"Server: Got TOSERVER_INIT from "
1985                                 <<peer_id<<std::endl;
1986
1987                 // First byte after command is maximum supported
1988                 // serialization version
1989                 u8 client_max = data[2];
1990                 u8 our_max = SER_FMT_VER_HIGHEST;
1991                 // Use the highest version supported by both
1992                 u8 deployed = core::min_(client_max, our_max);
1993                 // If it's lower than the lowest supported, give up.
1994                 if(deployed < SER_FMT_VER_LOWEST)
1995                         deployed = SER_FMT_VER_INVALID;
1996
1997                 //peer->serialization_version = deployed;
1998                 getClient(peer_id)->pending_serialization_version = deployed;
1999
2000                 if(deployed == SER_FMT_VER_INVALID)
2001                 {
2002                         actionstream<<"Server: A mismatched client tried to connect from "
2003                                         <<addr_s<<std::endl;
2004                         infostream<<"Server: Cannot negotiate "
2005                                         "serialization version with peer "
2006                                         <<peer_id<<std::endl;
2007                         SendAccessDenied(m_con, peer_id, std::wstring(
2008                                         L"Your client's version is not supported.\n"
2009                                         L"Server version is ")
2010                                         + narrow_to_wide(VERSION_STRING) + L"."
2011                         );
2012                         return;
2013                 }
2014
2015                 /*
2016                         Read and check network protocol version
2017                 */
2018
2019                 u16 net_proto_version = 0;
2020                 if(datasize >= 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE+2)
2021                 {
2022                         net_proto_version = readU16(&data[2+1+PLAYERNAME_SIZE+PASSWORD_SIZE]);
2023                 }
2024
2025                 getClient(peer_id)->net_proto_version = net_proto_version;
2026
2027                 if(net_proto_version == 0)
2028                 {
2029                         actionstream<<"Server: An old tried to connect from "<<addr_s
2030                                         <<std::endl;
2031                         SendAccessDenied(m_con, peer_id, std::wstring(
2032                                         L"Your client's version is not supported.\n"
2033                                         L"Server version is ")
2034                                         + narrow_to_wide(VERSION_STRING) + L"."
2035                         );
2036                         return;
2037                 }
2038
2039                 if(g_settings->getBool("strict_protocol_version_checking"))
2040                 {
2041                         if(net_proto_version != PROTOCOL_VERSION)
2042                         {
2043                                 actionstream<<"Server: A mismatched client tried to connect"
2044                                                 <<" from "<<addr_s<<std::endl;
2045                                 SendAccessDenied(m_con, peer_id, std::wstring(
2046                                                 L"Your client's version is not supported.\n"
2047                                                 L"Server version is ")
2048                                                 + narrow_to_wide(VERSION_STRING) + L",\n"
2049                                                 + L"server's PROTOCOL_VERSION is "
2050                                                 + narrow_to_wide(itos(PROTOCOL_VERSION))
2051                                                 + L", client's PROTOCOL_VERSION is "
2052                                                 + narrow_to_wide(itos(net_proto_version))
2053                                 );
2054                                 return;
2055                         }
2056                 }
2057
2058                 /*
2059                         Set up player
2060                 */
2061
2062                 // Get player name
2063                 char playername[PLAYERNAME_SIZE];
2064                 for(u32 i=0; i<PLAYERNAME_SIZE-1; i++)
2065                 {
2066                         playername[i] = data[3+i];
2067                 }
2068                 playername[PLAYERNAME_SIZE-1] = 0;
2069
2070                 if(playername[0]=='\0')
2071                 {
2072                         actionstream<<"Server: Player with an empty name "
2073                                         <<"tried to connect from "<<addr_s<<std::endl;
2074                         SendAccessDenied(m_con, peer_id,
2075                                         L"Empty name");
2076                         return;
2077                 }
2078
2079                 if(string_allowed(playername, PLAYERNAME_ALLOWED_CHARS)==false)
2080                 {
2081                         actionstream<<"Server: Player with an invalid name "
2082                                         <<"tried to connect from "<<addr_s<<std::endl;
2083                         SendAccessDenied(m_con, peer_id,
2084                                         L"Name contains unallowed characters");
2085                         return;
2086                 }
2087
2088                 infostream<<"Server: New connection: \""<<playername<<"\" from "
2089                                 <<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;
2090
2091                 // Get password
2092                 char password[PASSWORD_SIZE];
2093                 if(datasize < 2+1+PLAYERNAME_SIZE+PASSWORD_SIZE)
2094                 {
2095                         // old version - assume blank password
2096                         password[0] = 0;
2097                 }
2098                 else
2099                 {
2100                         for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2101                         {
2102                                 password[i] = data[23+i];
2103                         }
2104                         password[PASSWORD_SIZE-1] = 0;
2105                 }
2106
2107                 if(!base64_is_valid(password)){
2108                         infostream<<"Server: "<<playername<<" supplied invalid password hash"<<std::endl;
2109                         SendAccessDenied(m_con, peer_id, L"Invalid password hash");
2110                         return;
2111                 }
2112
2113                 std::string checkpwd;
2114                 bool has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2115
2116                 if(!has_auth){
2117                         std::wstring raw_default_password =
2118                                 narrow_to_wide(g_settings->get("default_password"));
2119                         std::string use_password =
2120                                 translatePassword(playername, raw_default_password);
2121
2122                         // If default_password is empty, allow any initial password
2123                         if (raw_default_password.length() == 0)
2124                                 use_password = password;
2125
2126                         scriptapi_create_auth(m_lua, playername, use_password);
2127                 }
2128
2129                 has_auth = scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2130
2131                 if(!has_auth){
2132                         SendAccessDenied(m_con, peer_id, L"Not allowed to login");
2133                         return;
2134                 }
2135
2136                 if(password != checkpwd){
2137                         infostream<<"Server: peer_id="<<peer_id
2138                                         <<": supplied invalid password for "
2139                                         <<playername<<std::endl;
2140                         SendAccessDenied(m_con, peer_id, L"Invalid password");
2141                         return;
2142                 }
2143
2144                 // Do not allow multiple players in simple singleplayer mode.
2145                 // This isn't a perfect way to do it, but will suffice for now.
2146                 if(m_simple_singleplayer_mode && m_clients.size() > 1){
2147                         infostream<<"Server: Not allowing another client to connect in"
2148                                         <<" simple singleplayer mode"<<std::endl;
2149                         SendAccessDenied(m_con, peer_id,
2150                                         L"Running in simple singleplayer mode.");
2151                         return;
2152                 }
2153
2154                 // Enforce user limit.
2155                 // Don't enforce for users that have some admin right
2156                 if(m_clients.size() >= g_settings->getU16("max_users") &&
2157                                 !checkPriv(playername, "server") &&
2158                                 !checkPriv(playername, "ban") &&
2159                                 !checkPriv(playername, "privs") &&
2160                                 !checkPriv(playername, "password") &&
2161                                 playername != g_settings->get("name"))
2162                 {
2163                         actionstream<<"Server: "<<playername<<" tried to join, but there"
2164                                         <<" are already max_users="
2165                                         <<g_settings->getU16("max_users")<<" players."<<std::endl;
2166                         SendAccessDenied(m_con, peer_id, L"Too many users.");
2167                         return;
2168                 }
2169
2170                 // Get player
2171                 PlayerSAO *playersao = emergePlayer(playername, peer_id);
2172
2173                 // If failed, cancel
2174                 if(playersao == NULL)
2175                 {
2176                         errorstream<<"Server: peer_id="<<peer_id
2177                                         <<": failed to emerge player"<<std::endl;
2178                         return;
2179                 }
2180
2181                 /*
2182                         Answer with a TOCLIENT_INIT
2183                 */
2184                 {
2185                         SharedBuffer<u8> reply(2+1+6+8);
2186                         writeU16(&reply[0], TOCLIENT_INIT);
2187                         writeU8(&reply[2], deployed);
2188                         writeV3S16(&reply[2+1], floatToInt(playersao->getPlayer()->getPosition()+v3f(0,BS/2,0), BS));
2189                         writeU64(&reply[2+1+6], m_env->getServerMap().getSeed());
2190
2191                         // Send as reliable
2192                         m_con.Send(peer_id, 0, reply, true);
2193                 }
2194
2195                 /*
2196                         Send complete position information
2197                 */
2198                 SendMovePlayer(peer_id);
2199
2200                 return;
2201         }
2202
2203         if(command == TOSERVER_INIT2)
2204         {
2205                 verbosestream<<"Server: Got TOSERVER_INIT2 from "
2206                                 <<peer_id<<std::endl;
2207
2208                 Player *player = m_env->getPlayer(peer_id);
2209                 if(!player){
2210                         verbosestream<<"Server: TOSERVER_INIT2: "
2211                                         <<"Player not found; ignoring."<<std::endl;
2212                         return;
2213                 }
2214
2215                 getClient(peer_id)->serialization_version
2216                                 = getClient(peer_id)->pending_serialization_version;
2217
2218                 /*
2219                         Send some initialization data
2220                 */
2221
2222                 infostream<<"Server: Sending content to "
2223                                 <<getPlayerName(peer_id)<<std::endl;
2224
2225                 // Send item definitions
2226                 SendItemDef(m_con, peer_id, m_itemdef);
2227
2228                 // Send node definitions
2229                 SendNodeDef(m_con, peer_id, m_nodedef);
2230
2231                 // Send media announcement
2232                 sendMediaAnnouncement(peer_id);
2233
2234                 // Send privileges
2235                 SendPlayerPrivileges(peer_id);
2236
2237                 // Send inventory
2238                 UpdateCrafting(peer_id);
2239                 SendInventory(peer_id);
2240
2241                 // Send HP
2242                 SendPlayerHP(peer_id);
2243
2244                 // Show death screen if necessary
2245                 if(player->hp == 0)
2246                         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
2247
2248                 // Send time of day
2249                 {
2250                         SharedBuffer<u8> data = makePacket_TOCLIENT_TIME_OF_DAY(
2251                                         m_env->getTimeOfDay(), g_settings->getFloat("time_speed"));
2252                         m_con.Send(peer_id, 0, data, true);
2253                 }
2254
2255                 // Note things in chat if not in simple singleplayer mode
2256                 if(!m_simple_singleplayer_mode)
2257                 {
2258                         // Send information about server to player in chat
2259                         SendChatMessage(peer_id, getStatusString());
2260
2261                         // Send information about joining in chat
2262                         {
2263                                 std::wstring name = L"unknown";
2264                                 Player *player = m_env->getPlayer(peer_id);
2265                                 if(player != NULL)
2266                                         name = narrow_to_wide(player->getName());
2267
2268                                 std::wstring message;
2269                                 message += L"*** ";
2270                                 message += name;
2271                                 message += L" joined game";
2272                                 BroadcastChatMessage(message);
2273                         }
2274                 }
2275
2276                 // Warnings about protocol version can be issued here
2277                 if(getClient(peer_id)->net_proto_version < PROTOCOL_VERSION)
2278                 {
2279                         SendChatMessage(peer_id, L"# Server: WARNING: YOUR CLIENT IS OLD AND MAY WORK PROPERLY WITH THIS SERVER");
2280                 }
2281
2282                 /*
2283                         Print out action
2284                 */
2285                 {
2286                         std::ostringstream os(std::ios_base::binary);
2287                         for(core::map<u16, RemoteClient*>::Iterator
2288                                 i = m_clients.getIterator();
2289                                 i.atEnd() == false; i++)
2290                         {
2291                                 RemoteClient *client = i.getNode()->getValue();
2292                                 assert(client->peer_id == i.getNode()->getKey());
2293                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2294                                         continue;
2295                                 // Get player
2296                                 Player *player = m_env->getPlayer(client->peer_id);
2297                                 if(!player)
2298                                         continue;
2299                                 // Get name of player
2300                                 os<<player->getName()<<" ";
2301                         }
2302
2303                         actionstream<<player->getName()<<" joins game. List of players: "
2304                                         <<os.str()<<std::endl;
2305                 }
2306
2307                 return;
2308         }
2309
2310         if(peer_ser_ver == SER_FMT_VER_INVALID)
2311         {
2312                 infostream<<"Server::ProcessData(): Cancelling: Peer"
2313                                 " serialization format invalid or not initialized."
2314                                 " Skipping incoming command="<<command<<std::endl;
2315                 return;
2316         }
2317
2318         Player *player = m_env->getPlayer(peer_id);
2319         if(player == NULL){
2320                 infostream<<"Server::ProcessData(): Cancelling: "
2321                                 "No player for peer_id="<<peer_id
2322                                 <<std::endl;
2323                 return;
2324         }
2325
2326         PlayerSAO *playersao = player->getPlayerSAO();
2327         if(playersao == NULL){
2328                 infostream<<"Server::ProcessData(): Cancelling: "
2329                                 "No player object for peer_id="<<peer_id
2330                                 <<std::endl;
2331                 return;
2332         }
2333
2334         if(command == TOSERVER_PLAYERPOS)
2335         {
2336                 if(datasize < 2+12+12+4+4)
2337                         return;
2338
2339                 u32 start = 0;
2340                 v3s32 ps = readV3S32(&data[start+2]);
2341                 v3s32 ss = readV3S32(&data[start+2+12]);
2342                 f32 pitch = (f32)readS32(&data[2+12+12]) / 100.0;
2343                 f32 yaw = (f32)readS32(&data[2+12+12+4]) / 100.0;
2344                 v3f position((f32)ps.X/100., (f32)ps.Y/100., (f32)ps.Z/100.);
2345                 v3f speed((f32)ss.X/100., (f32)ss.Y/100., (f32)ss.Z/100.);
2346                 pitch = wrapDegrees(pitch);
2347                 yaw = wrapDegrees(yaw);
2348
2349                 player->setPosition(position);
2350                 player->setSpeed(speed);
2351                 player->setPitch(pitch);
2352                 player->setYaw(yaw);
2353
2354                 /*infostream<<"Server::ProcessData(): Moved player "<<peer_id<<" to "
2355                                 <<"("<<position.X<<","<<position.Y<<","<<position.Z<<")"
2356                                 <<" pitch="<<pitch<<" yaw="<<yaw<<std::endl;*/
2357         }
2358         else if(command == TOSERVER_GOTBLOCKS)
2359         {
2360                 if(datasize < 2+1)
2361                         return;
2362
2363                 /*
2364                         [0] u16 command
2365                         [2] u8 count
2366                         [3] v3s16 pos_0
2367                         [3+6] v3s16 pos_1
2368                         ...
2369                 */
2370
2371                 u16 count = data[2];
2372                 for(u16 i=0; i<count; i++)
2373                 {
2374                         if((s16)datasize < 2+1+(i+1)*6)
2375                                 throw con::InvalidIncomingDataException
2376                                         ("GOTBLOCKS length is too short");
2377                         v3s16 p = readV3S16(&data[2+1+i*6]);
2378                         /*infostream<<"Server: GOTBLOCKS ("
2379                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2380                         RemoteClient *client = getClient(peer_id);
2381                         client->GotBlock(p);
2382                 }
2383         }
2384         else if(command == TOSERVER_DELETEDBLOCKS)
2385         {
2386                 if(datasize < 2+1)
2387                         return;
2388
2389                 /*
2390                         [0] u16 command
2391                         [2] u8 count
2392                         [3] v3s16 pos_0
2393                         [3+6] v3s16 pos_1
2394                         ...
2395                 */
2396
2397                 u16 count = data[2];
2398                 for(u16 i=0; i<count; i++)
2399                 {
2400                         if((s16)datasize < 2+1+(i+1)*6)
2401                                 throw con::InvalidIncomingDataException
2402                                         ("DELETEDBLOCKS length is too short");
2403                         v3s16 p = readV3S16(&data[2+1+i*6]);
2404                         /*infostream<<"Server: DELETEDBLOCKS ("
2405                                         <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/
2406                         RemoteClient *client = getClient(peer_id);
2407                         client->SetBlockNotSent(p);
2408                 }
2409         }
2410         else if(command == TOSERVER_CLICK_OBJECT)
2411         {
2412                 infostream<<"Server: CLICK_OBJECT not supported anymore"<<std::endl;
2413                 return;
2414         }
2415         else if(command == TOSERVER_CLICK_ACTIVEOBJECT)
2416         {
2417                 infostream<<"Server: CLICK_ACTIVEOBJECT not supported anymore"<<std::endl;
2418                 return;
2419         }
2420         else if(command == TOSERVER_GROUND_ACTION)
2421         {
2422                 infostream<<"Server: GROUND_ACTION not supported anymore"<<std::endl;
2423                 return;
2424
2425         }
2426         else if(command == TOSERVER_RELEASE)
2427         {
2428                 infostream<<"Server: RELEASE not supported anymore"<<std::endl;
2429                 return;
2430         }
2431         else if(command == TOSERVER_SIGNTEXT)
2432         {
2433                 infostream<<"Server: SIGNTEXT not supported anymore"
2434                                 <<std::endl;
2435                 return;
2436         }
2437         else if(command == TOSERVER_SIGNNODETEXT)
2438         {
2439                 infostream<<"Server: SIGNNODETEXT not supported anymore"
2440                                 <<std::endl;
2441                 return;
2442         }
2443         else if(command == TOSERVER_INVENTORY_ACTION)
2444         {
2445                 // Strip command and create a stream
2446                 std::string datastring((char*)&data[2], datasize-2);
2447                 verbosestream<<"TOSERVER_INVENTORY_ACTION: data="<<datastring<<std::endl;
2448                 std::istringstream is(datastring, std::ios_base::binary);
2449                 // Create an action
2450                 InventoryAction *a = InventoryAction::deSerialize(is);
2451                 if(a == NULL)
2452                 {
2453                         infostream<<"TOSERVER_INVENTORY_ACTION: "
2454                                         <<"InventoryAction::deSerialize() returned NULL"
2455                                         <<std::endl;
2456                         return;
2457                 }
2458
2459                 /*
2460                         Note: Always set inventory not sent, to repair cases
2461                         where the client made a bad prediction.
2462                 */
2463
2464                 /*
2465                         Handle restrictions and special cases of the move action
2466                 */
2467                 if(a->getType() == IACTION_MOVE)
2468                 {
2469                         IMoveAction *ma = (IMoveAction*)a;
2470
2471                         ma->from_inv.applyCurrentPlayer(player->getName());
2472                         ma->to_inv.applyCurrentPlayer(player->getName());
2473
2474                         setInventoryModified(ma->from_inv);
2475                         setInventoryModified(ma->to_inv);
2476
2477                         bool from_inv_is_current_player =
2478                                 (ma->from_inv.type == InventoryLocation::PLAYER) &&
2479                                 (ma->from_inv.name == player->getName());
2480
2481                         bool to_inv_is_current_player =
2482                                 (ma->to_inv.type == InventoryLocation::PLAYER) &&
2483                                 (ma->to_inv.name == player->getName());
2484
2485                         /*
2486                                 Disable moving items out of craftpreview
2487                         */
2488                         if(ma->from_list == "craftpreview")
2489                         {
2490                                 infostream<<"Ignoring IMoveAction from "
2491                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2492                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2493                                                 <<" because src is "<<ma->from_list<<std::endl;
2494                                 delete a;
2495                                 return;
2496                         }
2497
2498                         /*
2499                                 Disable moving items into craftresult and craftpreview
2500                         */
2501                         if(ma->to_list == "craftpreview" || ma->to_list == "craftresult")
2502                         {
2503                                 infostream<<"Ignoring IMoveAction from "
2504                                                 <<(ma->from_inv.dump())<<":"<<ma->from_list
2505                                                 <<" to "<<(ma->to_inv.dump())<<":"<<ma->to_list
2506                                                 <<" because dst is "<<ma->to_list<<std::endl;
2507                                 delete a;
2508                                 return;
2509                         }
2510
2511                         // Disallow moving items in elsewhere than player's inventory
2512                         // if not allowed to interact
2513                         if(!checkPriv(player->getName(), "interact") &&
2514                                         (!from_inv_is_current_player ||
2515                                         !to_inv_is_current_player))
2516                         {
2517                                 infostream<<"Cannot move outside of player's inventory: "
2518                                                 <<"No interact privilege"<<std::endl;
2519                                 delete a;
2520                                 return;
2521                         }
2522
2523                         // If player is not an admin, check for ownership of src and dst
2524                         /*if(!checkPriv(player->getName(), "server"))
2525                         {
2526                                 std::string owner_from = getInventoryOwner(ma->from_inv);
2527                                 if(owner_from != "" && owner_from != player->getName())
2528                                 {
2529                                         infostream<<"WARNING: "<<player->getName()
2530                                                 <<" tried to access an inventory that"
2531                                                 <<" belongs to "<<owner_from<<std::endl;
2532                                         delete a;
2533                                         return;
2534                                 }
2535
2536                                 std::string owner_to = getInventoryOwner(ma->to_inv);
2537                                 if(owner_to != "" && owner_to != player->getName())
2538                                 {
2539                                         infostream<<"WARNING: "<<player->getName()
2540                                                 <<" tried to access an inventory that"
2541                                                 <<" belongs to "<<owner_to<<std::endl;
2542                                         delete a;
2543                                         return;
2544                                 }
2545                         }*/
2546                 }
2547                 /*
2548                         Handle restrictions and special cases of the drop action
2549                 */
2550                 else if(a->getType() == IACTION_DROP)
2551                 {
2552                         IDropAction *da = (IDropAction*)a;
2553
2554                         da->from_inv.applyCurrentPlayer(player->getName());
2555
2556                         setInventoryModified(da->from_inv);
2557
2558                         // Disallow dropping items if not allowed to interact
2559                         if(!checkPriv(player->getName(), "interact"))
2560                         {
2561                                 delete a;
2562                                 return;
2563                         }
2564                         // If player is not an admin, check for ownership
2565                         /*else if(!checkPriv(player->getName(), "server"))
2566                         {
2567                                 std::string owner_from = getInventoryOwner(da->from_inv);
2568                                 if(owner_from != "" && owner_from != player->getName())
2569                                 {
2570                                         infostream<<"WARNING: "<<player->getName()
2571                                                 <<" tried to access an inventory that"
2572                                                 <<" belongs to "<<owner_from<<std::endl;
2573                                         delete a;
2574                                         return;
2575                                 }
2576                         }*/
2577                 }
2578                 /*
2579                         Handle restrictions and special cases of the craft action
2580                 */
2581                 else if(a->getType() == IACTION_CRAFT)
2582                 {
2583                         ICraftAction *ca = (ICraftAction*)a;
2584
2585                         ca->craft_inv.applyCurrentPlayer(player->getName());
2586
2587                         setInventoryModified(ca->craft_inv);
2588
2589                         //bool craft_inv_is_current_player =
2590                         //      (ca->craft_inv.type == InventoryLocation::PLAYER) &&
2591                         //      (ca->craft_inv.name == player->getName());
2592
2593                         // Disallow crafting if not allowed to interact
2594                         if(!checkPriv(player->getName(), "interact"))
2595                         {
2596                                 infostream<<"Cannot craft: "
2597                                                 <<"No interact privilege"<<std::endl;
2598                                 delete a;
2599                                 return;
2600                         }
2601
2602                         // If player is not an admin, check for ownership of inventory
2603                         /*if(!checkPriv(player->getName(), "server"))
2604                         {
2605                                 std::string owner_craft = getInventoryOwner(ca->craft_inv);
2606                                 if(owner_craft != "" && owner_craft != player->getName())
2607                                 {
2608                                         infostream<<"WARNING: "<<player->getName()
2609                                                 <<" tried to access an inventory that"
2610                                                 <<" belongs to "<<owner_craft<<std::endl;
2611                                         delete a;
2612                                         return;
2613                                 }
2614                         }*/
2615                 }
2616
2617                 // Do the action
2618                 a->apply(this, playersao, this);
2619                 // Eat the action
2620                 delete a;
2621         }
2622         else if(command == TOSERVER_CHAT_MESSAGE)
2623         {
2624                 /*
2625                         u16 command
2626                         u16 length
2627                         wstring message
2628                 */
2629                 u8 buf[6];
2630                 std::string datastring((char*)&data[2], datasize-2);
2631                 std::istringstream is(datastring, std::ios_base::binary);
2632
2633                 // Read stuff
2634                 is.read((char*)buf, 2);
2635                 u16 len = readU16(buf);
2636
2637                 std::wstring message;
2638                 for(u16 i=0; i<len; i++)
2639                 {
2640                         is.read((char*)buf, 2);
2641                         message += (wchar_t)readU16(buf);
2642                 }
2643
2644                 // Get player name of this client
2645                 std::wstring name = narrow_to_wide(player->getName());
2646
2647                 // Run script hook
2648                 bool ate = scriptapi_on_chat_message(m_lua, player->getName(),
2649                                 wide_to_narrow(message));
2650                 // If script ate the message, don't proceed
2651                 if(ate)
2652                         return;
2653
2654                 // Line to send to players
2655                 std::wstring line;
2656                 // Whether to send to the player that sent the line
2657                 bool send_to_sender = false;
2658                 // Whether to send to other players
2659                 bool send_to_others = false;
2660
2661                 // Parse commands
2662                 if(message[0] == L'/')
2663                 {
2664                         size_t strip_size = 1;
2665                         if (message[1] == L'#') // support old-style commans
2666                                 ++strip_size;
2667                         message = message.substr(strip_size);
2668
2669                         WStrfnd f1(message);
2670                         f1.next(L" "); // Skip over /#whatever
2671                         std::wstring paramstring = f1.next(L"");
2672
2673                         ServerCommandContext *ctx = new ServerCommandContext(
2674                                 str_split(message, L' '),
2675                                 paramstring,
2676                                 this,
2677                                 m_env,
2678                                 player);
2679
2680                         std::wstring reply(processServerCommand(ctx));
2681                         send_to_sender = ctx->flags & SEND_TO_SENDER;
2682                         send_to_others = ctx->flags & SEND_TO_OTHERS;
2683
2684                         if (ctx->flags & SEND_NO_PREFIX)
2685                                 line += reply;
2686                         else
2687                                 line += L"Server: " + reply;
2688
2689                         delete ctx;
2690
2691                 }
2692                 else
2693                 {
2694                         if(checkPriv(player->getName(), "shout")){
2695                                 line += L"<";
2696                                 line += name;
2697                                 line += L"> ";
2698                                 line += message;
2699                                 send_to_others = true;
2700                         } else {
2701                                 line += L"Server: You are not allowed to shout";
2702                                 send_to_sender = true;
2703                         }
2704                 }
2705
2706                 if(line != L"")
2707                 {
2708                         if(send_to_others)
2709                                 actionstream<<"CHAT: "<<wide_to_narrow(line)<<std::endl;
2710
2711                         /*
2712                                 Send the message to clients
2713                         */
2714                         for(core::map<u16, RemoteClient*>::Iterator
2715                                 i = m_clients.getIterator();
2716                                 i.atEnd() == false; i++)
2717                         {
2718                                 // Get client and check that it is valid
2719                                 RemoteClient *client = i.getNode()->getValue();
2720                                 assert(client->peer_id == i.getNode()->getKey());
2721                                 if(client->serialization_version == SER_FMT_VER_INVALID)
2722                                         continue;
2723
2724                                 // Filter recipient
2725                                 bool sender_selected = (peer_id == client->peer_id);
2726                                 if(sender_selected == true && send_to_sender == false)
2727                                         continue;
2728                                 if(sender_selected == false && send_to_others == false)
2729                                         continue;
2730
2731                                 SendChatMessage(client->peer_id, line);
2732                         }
2733                 }
2734         }
2735         else if(command == TOSERVER_DAMAGE)
2736         {
2737                 std::string datastring((char*)&data[2], datasize-2);
2738                 std::istringstream is(datastring, std::ios_base::binary);
2739                 u8 damage = readU8(is);
2740
2741                 actionstream<<player->getName()<<" damaged by "
2742                                 <<(int)damage<<" hp at "<<PP(player->getPosition()/BS)
2743                                 <<std::endl;
2744
2745                 playersao->setHP(playersao->getHP() - damage);
2746
2747                 if(playersao->getHP() == 0 && playersao->m_hp_not_sent)
2748                         DiePlayer(peer_id);
2749
2750                 if(playersao->m_hp_not_sent)
2751                         SendPlayerHP(peer_id);
2752         }
2753         else if(command == TOSERVER_PASSWORD)
2754         {
2755                 /*
2756                         [0] u16 TOSERVER_PASSWORD
2757                         [2] u8[28] old password
2758                         [30] u8[28] new password
2759                 */
2760
2761                 if(datasize != 2+PASSWORD_SIZE*2)
2762                         return;
2763                 /*char password[PASSWORD_SIZE];
2764                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2765                         password[i] = data[2+i];
2766                 password[PASSWORD_SIZE-1] = 0;*/
2767                 std::string oldpwd;
2768                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2769                 {
2770                         char c = data[2+i];
2771                         if(c == 0)
2772                                 break;
2773                         oldpwd += c;
2774                 }
2775                 std::string newpwd;
2776                 for(u32 i=0; i<PASSWORD_SIZE-1; i++)
2777                 {
2778                         char c = data[2+PASSWORD_SIZE+i];
2779                         if(c == 0)
2780                                 break;
2781                         newpwd += c;
2782                 }
2783
2784                 if(!base64_is_valid(newpwd)){
2785                         infostream<<"Server: "<<player->getName()<<" supplied invalid password hash"<<std::endl;
2786                         // Wrong old password supplied!!
2787                         SendChatMessage(peer_id, L"Invalid new password hash supplied. Password NOT changed.");
2788                         return;
2789                 }
2790
2791                 infostream<<"Server: Client requests a password change from "
2792                                 <<"'"<<oldpwd<<"' to '"<<newpwd<<"'"<<std::endl;
2793
2794                 std::string playername = player->getName();
2795
2796                 std::string checkpwd;
2797                 scriptapi_get_auth(m_lua, playername, &checkpwd, NULL);
2798
2799                 if(oldpwd != checkpwd)
2800                 {
2801                         infostream<<"Server: invalid old password"<<std::endl;
2802                         // Wrong old password supplied!!
2803                         SendChatMessage(peer_id, L"Invalid old password supplied. Password NOT changed.");
2804                         return;
2805                 }
2806
2807                 bool success = scriptapi_set_password(m_lua, playername, newpwd);
2808                 if(success){
2809                         actionstream<<player->getName()<<" changes password"<<std::endl;
2810                         SendChatMessage(peer_id, L"Password change successful");
2811                 } else {
2812                         actionstream<<player->getName()<<" tries to change password but "
2813                                         <<"it fails"<<std::endl;
2814                         SendChatMessage(peer_id, L"Password change failed or inavailable");
2815                 }
2816         }
2817         else if(command == TOSERVER_PLAYERITEM)
2818         {
2819                 if (datasize < 2+2)
2820                         return;
2821
2822                 u16 item = readU16(&data[2]);
2823                 playersao->setWieldIndex(item);
2824         }
2825         else if(command == TOSERVER_RESPAWN)
2826         {
2827                 if(player->hp != 0)
2828                         return;
2829
2830                 RespawnPlayer(peer_id);
2831
2832                 actionstream<<player->getName()<<" respawns at "
2833                                 <<PP(player->getPosition()/BS)<<std::endl;
2834
2835                 // ActiveObject is added to environment in AsyncRunStep after
2836                 // the previous addition has been succesfully removed
2837         }
2838         else if(command == TOSERVER_REQUEST_MEDIA) {
2839                 std::string datastring((char*)&data[2], datasize-2);
2840                 std::istringstream is(datastring, std::ios_base::binary);
2841
2842                 core::list<MediaRequest> tosend;
2843                 u16 numfiles = readU16(is);
2844
2845                 infostream<<"Sending "<<numfiles<<" files to "
2846                                 <<getPlayerName(peer_id)<<std::endl;
2847                 verbosestream<<"TOSERVER_REQUEST_MEDIA: "<<std::endl;
2848
2849                 for(int i = 0; i < numfiles; i++) {
2850                         std::string name = deSerializeString(is);
2851                         tosend.push_back(MediaRequest(name));
2852                         verbosestream<<"TOSERVER_REQUEST_MEDIA: requested file "
2853                                         <<name<<std::endl;
2854                 }
2855
2856                 sendRequestedMedia(peer_id, tosend);
2857
2858                 // Now the client should know about everything
2859                 // (definitions and files)
2860                 getClient(peer_id)->definitions_sent = true;
2861         }
2862         else if(command == TOSERVER_INTERACT)
2863         {
2864                 std::string datastring((char*)&data[2], datasize-2);
2865                 std::istringstream is(datastring, std::ios_base::binary);
2866
2867                 /*
2868                         [0] u16 command
2869                         [2] u8 action
2870                         [3] u16 item
2871                         [5] u32 length of the next item
2872                         [9] serialized PointedThing
2873                         actions:
2874                         0: start digging (from undersurface) or use
2875                         1: stop digging (all parameters ignored)
2876                         2: digging completed
2877                         3: place block or item (to abovesurface)
2878                         4: use item
2879                 */
2880                 u8 action = readU8(is);
2881                 u16 item_i = readU16(is);
2882                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
2883                 PointedThing pointed;
2884                 pointed.deSerialize(tmp_is);
2885
2886                 verbosestream<<"TOSERVER_INTERACT: action="<<(int)action<<", item="
2887                                 <<item_i<<", pointed="<<pointed.dump()<<std::endl;
2888
2889                 if(player->hp == 0)
2890                 {
2891                         verbosestream<<"TOSERVER_INTERACT: "<<player->getName()
2892                                 <<" tried to interact, but is dead!"<<std::endl;
2893                         return;
2894                 }
2895
2896                 v3f player_pos = playersao->getLastGoodPosition();
2897
2898                 // Update wielded item
2899                 playersao->setWieldIndex(item_i);
2900
2901                 // Get pointed to node (undefined if not POINTEDTYPE_NODE)
2902                 v3s16 p_under = pointed.node_undersurface;
2903                 v3s16 p_above = pointed.node_abovesurface;
2904
2905                 // Get pointed to object (NULL if not POINTEDTYPE_OBJECT)
2906                 ServerActiveObject *pointed_object = NULL;
2907                 if(pointed.type == POINTEDTHING_OBJECT)
2908                 {
2909                         pointed_object = m_env->getActiveObject(pointed.object_id);
2910                         if(pointed_object == NULL)
2911                         {
2912                                 verbosestream<<"TOSERVER_INTERACT: "
2913                                         "pointed object is NULL"<<std::endl;
2914                                 return;
2915                         }
2916
2917                 }
2918
2919                 v3f pointed_pos_under = player_pos;
2920                 v3f pointed_pos_above = player_pos;
2921                 if(pointed.type == POINTEDTHING_NODE)
2922                 {
2923                         pointed_pos_under = intToFloat(p_under, BS);
2924                         pointed_pos_above = intToFloat(p_above, BS);
2925                 }
2926                 else if(pointed.type == POINTEDTHING_OBJECT)
2927                 {
2928                         pointed_pos_under = pointed_object->getBasePosition();
2929                         pointed_pos_above = pointed_pos_under;
2930                 }
2931
2932                 /*
2933                         Check that target is reasonably close
2934                         (only when digging or placing things)
2935                 */
2936                 if(action == 0 || action == 2 || action == 3)
2937                 {
2938                         float d = player_pos.getDistanceFrom(pointed_pos_under);
2939                         float max_d = BS * 14; // Just some large enough value
2940                         if(d > max_d){
2941                                 actionstream<<"Player "<<player->getName()
2942                                                 <<" tried to access "<<pointed.dump()
2943                                                 <<" from too far: "
2944                                                 <<"d="<<d<<", max_d="<<max_d
2945                                                 <<". ignoring."<<std::endl;
2946                                 // Re-send block to revert change on client-side
2947                                 RemoteClient *client = getClient(peer_id);
2948                                 v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2949                                 client->SetBlockNotSent(blockpos);
2950                                 // Do nothing else
2951                                 return;
2952                         }
2953                 }
2954
2955                 /*
2956                         Make sure the player is allowed to do it
2957                 */
2958                 if(!checkPriv(player->getName(), "interact"))
2959                 {
2960                         actionstream<<player->getName()<<" attempted to interact with "
2961                                         <<pointed.dump()<<" without 'interact' privilege"
2962                                         <<std::endl;
2963                         // Re-send block to revert change on client-side
2964                         RemoteClient *client = getClient(peer_id);
2965                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
2966                         client->SetBlockNotSent(blockpos);
2967                         return;
2968                 }
2969
2970                 /*
2971                         0: start digging or punch object
2972                 */
2973                 if(action == 0)
2974                 {
2975                         if(pointed.type == POINTEDTHING_NODE)
2976                         {
2977                                 /*
2978                                         NOTE: This can be used in the future to check if
2979                                         somebody is cheating, by checking the timing.
2980                                 */
2981                                 MapNode n(CONTENT_IGNORE);
2982                                 try
2983                                 {
2984                                         n = m_env->getMap().getNode(p_under);
2985                                 }
2986                                 catch(InvalidPositionException &e)
2987                                 {
2988                                         infostream<<"Server: Not punching: Node not found."
2989                                                         <<" Adding block to emerge queue."
2990                                                         <<std::endl;
2991                                         m_emerge_queue.addBlock(peer_id,
2992                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
2993                                 }
2994                                 if(n.getContent() != CONTENT_IGNORE)
2995                                         scriptapi_node_on_punch(m_lua, p_under, n, playersao);
2996                         }
2997                         else if(pointed.type == POINTEDTHING_OBJECT)
2998                         {
2999                                 // Skip if object has been removed
3000                                 if(pointed_object->m_removed)
3001                                         return;
3002
3003                                 actionstream<<player->getName()<<" punches object "
3004                                                 <<pointed.object_id<<": "
3005                                                 <<pointed_object->getDescription()<<std::endl;
3006
3007                                 ItemStack punchitem = playersao->getWieldedItem();
3008                                 ToolCapabilities toolcap =
3009                                                 punchitem.getToolCapabilities(m_itemdef);
3010                                 v3f dir = (pointed_object->getBasePosition() -
3011                                                 (player->getPosition() + player->getEyeOffset())
3012                                                         ).normalize();
3013                                 float time_from_last_punch =
3014                                         playersao->resetTimeFromLastPunch();
3015                                 pointed_object->punch(dir, &toolcap, playersao,
3016                                                 time_from_last_punch);
3017                         }
3018
3019                 } // action == 0
3020
3021                 /*
3022                         1: stop digging
3023                 */
3024                 else if(action == 1)
3025                 {
3026                 } // action == 1
3027
3028                 /*
3029                         2: Digging completed
3030                 */
3031                 else if(action == 2)
3032                 {
3033                         // Only complete digging of nodes
3034                         if(pointed.type == POINTEDTHING_NODE)
3035                         {
3036                                 MapNode n(CONTENT_IGNORE);
3037                                 try
3038                                 {
3039                                         n = m_env->getMap().getNode(p_under);
3040                                 }
3041                                 catch(InvalidPositionException &e)
3042                                 {
3043                                         infostream<<"Server: Not finishing digging: Node not found."
3044                                                         <<" Adding block to emerge queue."
3045                                                         <<std::endl;
3046                                         m_emerge_queue.addBlock(peer_id,
3047                                                         getNodeBlockPos(p_above), BLOCK_EMERGE_FLAG_FROMDISK);
3048                                 }
3049                                 if(n.getContent() != CONTENT_IGNORE)
3050                                         scriptapi_node_on_dig(m_lua, p_under, n, playersao);
3051
3052                                 if (m_env->getMap().getNodeNoEx(p_under).getContent() != CONTENT_AIR)
3053                                 {
3054                                         // Re-send block to revert change on client-side
3055                                         RemoteClient *client = getClient(peer_id);
3056                                         v3s16 blockpos = getNodeBlockPos(floatToInt(pointed_pos_under, BS));
3057                                         client->SetBlockNotSent(blockpos);
3058                                 }
3059                         }
3060                 } // action == 2
3061
3062                 /*
3063                         3: place block or right-click object
3064                 */
3065                 else if(action == 3)
3066                 {
3067                         ItemStack item = playersao->getWieldedItem();
3068
3069                         // Reset build time counter
3070                         if(pointed.type == POINTEDTHING_NODE &&
3071                                         item.getDefinition(m_itemdef).type == ITEM_NODE)
3072                                 getClient(peer_id)->m_time_from_building = 0.0;
3073
3074                         if(pointed.type == POINTEDTHING_OBJECT)
3075                         {
3076                                 // Right click object
3077
3078                                 // Skip if object has been removed
3079                                 if(pointed_object->m_removed)
3080                                         return;
3081
3082                                 actionstream<<player->getName()<<" right-clicks object "
3083                                                 <<pointed.object_id<<": "
3084                                                 <<pointed_object->getDescription()<<std::endl;
3085
3086                                 // Do stuff
3087                                 pointed_object->rightClick(playersao);
3088                         }
3089                         else if(scriptapi_item_on_place(m_lua,
3090                                         item, playersao, pointed))
3091                         {
3092                                 // Placement was handled in lua
3093
3094                                 // Apply returned ItemStack
3095                                 if(g_settings->getBool("creative_mode") == false)
3096                                         playersao->setWieldedItem(item);
3097                         }
3098
3099                 } // action == 3
3100
3101                 /*
3102                         4: use
3103                 */
3104                 else if(action == 4)
3105                 {
3106                         ItemStack item = playersao->getWieldedItem();
3107
3108                         actionstream<<player->getName()<<" uses "<<item.name
3109                                         <<", pointing at "<<pointed.dump()<<std::endl;
3110
3111                         if(scriptapi_item_on_use(m_lua,
3112                                         item, playersao, pointed))
3113                         {
3114                                 // Apply returned ItemStack
3115                                 if(g_settings->getBool("creative_mode") == false)
3116                                         playersao->setWieldedItem(item);
3117                         }
3118
3119                 } // action == 4
3120
3121                 /*
3122                         Catch invalid actions
3123                 */
3124                 else
3125                 {
3126                         infostream<<"WARNING: Server: Invalid action "
3127                                         <<action<<std::endl;
3128                 }
3129         }
3130         else if(command == TOSERVER_REMOVED_SOUNDS)
3131         {
3132                 std::string datastring((char*)&data[2], datasize-2);
3133                 std::istringstream is(datastring, std::ios_base::binary);
3134
3135                 int num = readU16(is);
3136                 for(int k=0; k<num; k++){
3137                         s32 id = readS32(is);
3138                         std::map<s32, ServerPlayingSound>::iterator i =
3139                                         m_playing_sounds.find(id);
3140                         if(i == m_playing_sounds.end())
3141                                 continue;
3142                         ServerPlayingSound &psound = i->second;
3143                         psound.clients.erase(peer_id);
3144                         if(psound.clients.size() == 0)
3145                                 m_playing_sounds.erase(i++);
3146                 }
3147         }
3148         else if(command == TOSERVER_NODEMETA_FIELDS)
3149         {
3150                 std::string datastring((char*)&data[2], datasize-2);
3151                 std::istringstream is(datastring, std::ios_base::binary);
3152
3153                 v3s16 p = readV3S16(is);
3154                 std::string formname = deSerializeString(is);
3155                 int num = readU16(is);
3156                 std::map<std::string, std::string> fields;
3157                 for(int k=0; k<num; k++){
3158                         std::string fieldname = deSerializeString(is);
3159                         std::string fieldvalue = deSerializeLongString(is);
3160                         fields[fieldname] = fieldvalue;
3161                 }
3162
3163                 scriptapi_node_on_receive_fields(m_lua, p, formname, fields,
3164                                 playersao);
3165         }
3166         else
3167         {
3168                 infostream<<"Server::ProcessData(): Ignoring "
3169                                 "unknown command "<<command<<std::endl;
3170         }
3171
3172         } //try
3173         catch(SendFailedException &e)
3174         {
3175                 errorstream<<"Server::ProcessData(): SendFailedException: "
3176                                 <<"what="<<e.what()
3177                                 <<std::endl;
3178         }
3179 }
3180
3181 void Server::onMapEditEvent(MapEditEvent *event)
3182 {
3183         //infostream<<"Server::onMapEditEvent()"<<std::endl;
3184         if(m_ignore_map_edit_events)
3185                 return;
3186         if(m_ignore_map_edit_events_area.contains(event->getArea()))
3187                 return;
3188         MapEditEvent *e = event->clone();
3189         m_unsent_map_edit_queue.push_back(e);
3190 }
3191
3192 Inventory* Server::getInventory(const InventoryLocation &loc)
3193 {
3194         switch(loc.type){
3195         case InventoryLocation::UNDEFINED:
3196         {}
3197         break;
3198         case InventoryLocation::CURRENT_PLAYER:
3199         {}
3200         break;
3201         case InventoryLocation::PLAYER:
3202         {
3203                 Player *player = m_env->getPlayer(loc.name.c_str());
3204                 if(!player)
3205                         return NULL;
3206                 PlayerSAO *playersao = player->getPlayerSAO();
3207                 if(!playersao)
3208                         return NULL;
3209                 return playersao->getInventory();
3210         }
3211         break;
3212         case InventoryLocation::NODEMETA:
3213         {
3214                 NodeMetadata *meta = m_env->getMap().getNodeMetadata(loc.p);
3215                 if(!meta)
3216                         return NULL;
3217                 return meta->getInventory();
3218         }
3219         break;
3220         default:
3221                 assert(0);
3222         }
3223         return NULL;
3224 }
3225 void Server::setInventoryModified(const InventoryLocation &loc)
3226 {
3227         switch(loc.type){
3228         case InventoryLocation::UNDEFINED:
3229         {}
3230         break;
3231         case InventoryLocation::PLAYER:
3232         {
3233                 Player *player = m_env->getPlayer(loc.name.c_str());
3234                 if(!player)
3235                         return;
3236                 PlayerSAO *playersao = player->getPlayerSAO();
3237                 if(!playersao)
3238                         return;
3239                 playersao->m_inventory_not_sent = true;
3240                 playersao->m_wielded_item_not_sent = true;
3241         }
3242         break;
3243         case InventoryLocation::NODEMETA:
3244         {
3245                 v3s16 blockpos = getNodeBlockPos(loc.p);
3246
3247                 MapBlock *block = m_env->getMap().getBlockNoCreateNoEx(blockpos);
3248                 if(block)
3249                         block->raiseModified(MOD_STATE_WRITE_NEEDED);
3250
3251                 setBlockNotSent(blockpos);
3252         }
3253         break;
3254         default:
3255                 assert(0);
3256         }
3257 }
3258
3259 core::list<PlayerInfo> Server::getPlayerInfo()
3260 {
3261         DSTACK(__FUNCTION_NAME);
3262         JMutexAutoLock envlock(m_env_mutex);
3263         JMutexAutoLock conlock(m_con_mutex);
3264
3265         core::list<PlayerInfo> list;
3266
3267         core::list<Player*> players = m_env->getPlayers();
3268
3269         core::list<Player*>::Iterator i;
3270         for(i = players.begin();
3271                         i != players.end(); i++)
3272         {
3273                 PlayerInfo info;
3274
3275                 Player *player = *i;
3276
3277                 try{
3278                         // Copy info from connection to info struct
3279                         info.id = player->peer_id;
3280                         info.address = m_con.GetPeerAddress(player->peer_id);
3281                         info.avg_rtt = m_con.GetPeerAvgRTT(player->peer_id);
3282                 }
3283                 catch(con::PeerNotFoundException &e)
3284                 {
3285                         // Set dummy peer info
3286                         info.id = 0;
3287                         info.address = Address(0,0,0,0,0);
3288                         info.avg_rtt = 0.0;
3289                 }
3290
3291                 snprintf(info.name, PLAYERNAME_SIZE, "%s", player->getName());
3292                 info.position = player->getPosition();
3293
3294                 list.push_back(info);
3295         }
3296
3297         return list;
3298 }
3299
3300
3301 void Server::peerAdded(con::Peer *peer)
3302 {
3303         DSTACK(__FUNCTION_NAME);
3304         verbosestream<<"Server::peerAdded(): peer->id="
3305                         <<peer->id<<std::endl;
3306
3307         PeerChange c;
3308         c.type = PEER_ADDED;
3309         c.peer_id = peer->id;
3310         c.timeout = false;
3311         m_peer_change_queue.push_back(c);
3312 }
3313
3314 void Server::deletingPeer(con::Peer *peer, bool timeout)
3315 {
3316         DSTACK(__FUNCTION_NAME);
3317         verbosestream<<"Server::deletingPeer(): peer->id="
3318                         <<peer->id<<", timeout="<<timeout<<std::endl;
3319
3320         PeerChange c;
3321         c.type = PEER_REMOVED;
3322         c.peer_id = peer->id;
3323         c.timeout = timeout;
3324         m_peer_change_queue.push_back(c);
3325 }
3326
3327 /*
3328         Static send methods
3329 */
3330
3331 void Server::SendHP(con::Connection &con, u16 peer_id, u8 hp)
3332 {
3333         DSTACK(__FUNCTION_NAME);
3334         std::ostringstream os(std::ios_base::binary);
3335
3336         writeU16(os, TOCLIENT_HP);
3337         writeU8(os, hp);
3338
3339         // Make data buffer
3340         std::string s = os.str();
3341         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3342         // Send as reliable
3343         con.Send(peer_id, 0, data, true);
3344 }
3345
3346 void Server::SendAccessDenied(con::Connection &con, u16 peer_id,
3347                 const std::wstring &reason)
3348 {
3349         DSTACK(__FUNCTION_NAME);
3350         std::ostringstream os(std::ios_base::binary);
3351
3352         writeU16(os, TOCLIENT_ACCESS_DENIED);
3353         os<<serializeWideString(reason);
3354
3355         // Make data buffer
3356         std::string s = os.str();
3357         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3358         // Send as reliable
3359         con.Send(peer_id, 0, data, true);
3360 }
3361
3362 void Server::SendDeathscreen(con::Connection &con, u16 peer_id,
3363                 bool set_camera_point_target, v3f camera_point_target)
3364 {
3365         DSTACK(__FUNCTION_NAME);
3366         std::ostringstream os(std::ios_base::binary);
3367
3368         writeU16(os, TOCLIENT_DEATHSCREEN);
3369         writeU8(os, set_camera_point_target);
3370         writeV3F1000(os, camera_point_target);
3371
3372         // Make data buffer
3373         std::string s = os.str();
3374         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3375         // Send as reliable
3376         con.Send(peer_id, 0, data, true);
3377 }
3378
3379 void Server::SendItemDef(con::Connection &con, u16 peer_id,
3380                 IItemDefManager *itemdef)
3381 {
3382         DSTACK(__FUNCTION_NAME);
3383         std::ostringstream os(std::ios_base::binary);
3384
3385         /*
3386                 u16 command
3387                 u32 length of the next item
3388                 zlib-compressed serialized ItemDefManager
3389         */
3390         writeU16(os, TOCLIENT_ITEMDEF);
3391         std::ostringstream tmp_os(std::ios::binary);
3392         itemdef->serialize(tmp_os);
3393         std::ostringstream tmp_os2(std::ios::binary);
3394         compressZlib(tmp_os.str(), tmp_os2);
3395         os<<serializeLongString(tmp_os2.str());
3396
3397         // Make data buffer
3398         std::string s = os.str();
3399         verbosestream<<"Server: Sending item definitions to id("<<peer_id
3400                         <<"): size="<<s.size()<<std::endl;
3401         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3402         // Send as reliable
3403         con.Send(peer_id, 0, data, true);
3404 }
3405
3406 void Server::SendNodeDef(con::Connection &con, u16 peer_id,
3407                 INodeDefManager *nodedef)
3408 {
3409         DSTACK(__FUNCTION_NAME);
3410         std::ostringstream os(std::ios_base::binary);
3411
3412         /*
3413                 u16 command
3414                 u32 length of the next item
3415                 zlib-compressed serialized NodeDefManager
3416         */
3417         writeU16(os, TOCLIENT_NODEDEF);
3418         std::ostringstream tmp_os(std::ios::binary);
3419         nodedef->serialize(tmp_os);
3420         std::ostringstream tmp_os2(std::ios::binary);
3421         compressZlib(tmp_os.str(), tmp_os2);
3422         os<<serializeLongString(tmp_os2.str());
3423
3424         // Make data buffer
3425         std::string s = os.str();
3426         verbosestream<<"Server: Sending node definitions to id("<<peer_id
3427                         <<"): size="<<s.size()<<std::endl;
3428         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3429         // Send as reliable
3430         con.Send(peer_id, 0, data, true);
3431 }
3432
3433 /*
3434         Non-static send methods
3435 */
3436
3437 void Server::SendInventory(u16 peer_id)
3438 {
3439         DSTACK(__FUNCTION_NAME);
3440
3441         PlayerSAO *playersao = getPlayerSAO(peer_id);
3442         assert(playersao);
3443
3444         playersao->m_inventory_not_sent = false;
3445
3446         /*
3447                 Serialize it
3448         */
3449
3450         std::ostringstream os;
3451         playersao->getInventory()->serialize(os);
3452
3453         std::string s = os.str();
3454
3455         SharedBuffer<u8> data(s.size()+2);
3456         writeU16(&data[0], TOCLIENT_INVENTORY);
3457         memcpy(&data[2], s.c_str(), s.size());
3458
3459         // Send as reliable
3460         m_con.Send(peer_id, 0, data, true);
3461 }
3462
3463 void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
3464 {
3465         DSTACK(__FUNCTION_NAME);
3466
3467         std::ostringstream os(std::ios_base::binary);
3468         u8 buf[12];
3469
3470         // Write command
3471         writeU16(buf, TOCLIENT_CHAT_MESSAGE);
3472         os.write((char*)buf, 2);
3473
3474         // Write length
3475         writeU16(buf, message.size());
3476         os.write((char*)buf, 2);
3477
3478         // Write string
3479         for(u32 i=0; i<message.size(); i++)
3480         {
3481                 u16 w = message[i];
3482                 writeU16(buf, w);
3483                 os.write((char*)buf, 2);
3484         }
3485
3486         // Make data buffer
3487         std::string s = os.str();
3488         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3489         // Send as reliable
3490         m_con.Send(peer_id, 0, data, true);
3491 }
3492
3493 void Server::BroadcastChatMessage(const std::wstring &message)
3494 {
3495         for(core::map<u16, RemoteClient*>::Iterator
3496                 i = m_clients.getIterator();
3497                 i.atEnd() == false; i++)
3498         {
3499                 // Get client and check that it is valid
3500                 RemoteClient *client = i.getNode()->getValue();
3501                 assert(client->peer_id == i.getNode()->getKey());
3502                 if(client->serialization_version == SER_FMT_VER_INVALID)
3503                         continue;
3504
3505                 SendChatMessage(client->peer_id, message);
3506         }
3507 }
3508
3509 void Server::SendPlayerHP(u16 peer_id)
3510 {
3511         DSTACK(__FUNCTION_NAME);
3512         PlayerSAO *playersao = getPlayerSAO(peer_id);
3513         assert(playersao);
3514         playersao->m_hp_not_sent = false;
3515         SendHP(m_con, peer_id, playersao->getHP());
3516 }
3517
3518 void Server::SendMovePlayer(u16 peer_id)
3519 {
3520         DSTACK(__FUNCTION_NAME);
3521         Player *player = m_env->getPlayer(peer_id);
3522         assert(player);
3523
3524         std::ostringstream os(std::ios_base::binary);
3525         writeU16(os, TOCLIENT_MOVE_PLAYER);
3526         writeV3F1000(os, player->getPosition());
3527         writeF1000(os, player->getPitch());
3528         writeF1000(os, player->getYaw());
3529
3530         {
3531                 v3f pos = player->getPosition();
3532                 f32 pitch = player->getPitch();
3533                 f32 yaw = player->getYaw();
3534                 verbosestream<<"Server: Sending TOCLIENT_MOVE_PLAYER"
3535                                 <<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
3536                                 <<" pitch="<<pitch
3537                                 <<" yaw="<<yaw
3538                                 <<std::endl;
3539         }
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         m_con.Send(peer_id, 0, data, true);
3546 }
3547
3548 void Server::SendPlayerPrivileges(u16 peer_id)
3549 {
3550         Player *player = m_env->getPlayer(peer_id);
3551         assert(player);
3552         std::set<std::string> privs;
3553         scriptapi_get_auth(m_lua, player->getName(), NULL, &privs);
3554
3555         std::ostringstream os(std::ios_base::binary);
3556         writeU16(os, TOCLIENT_PRIVILEGES);
3557         writeU16(os, privs.size());
3558         for(std::set<std::string>::const_iterator i = privs.begin();
3559                         i != privs.end(); i++){
3560                 os<<serializeString(*i);
3561         }
3562
3563         // Make data buffer
3564         std::string s = os.str();
3565         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3566         // Send as reliable
3567         m_con.Send(peer_id, 0, data, true);
3568 }
3569
3570 s32 Server::playSound(const SimpleSoundSpec &spec,
3571                 const ServerSoundParams &params)
3572 {
3573         // Find out initial position of sound
3574         bool pos_exists = false;
3575         v3f pos = params.getPos(m_env, &pos_exists);
3576         // If position is not found while it should be, cancel sound
3577         if(pos_exists != (params.type != ServerSoundParams::SSP_LOCAL))
3578                 return -1;
3579         // Filter destination clients
3580         std::set<RemoteClient*> dst_clients;
3581         if(params.to_player != "")
3582         {
3583                 Player *player = m_env->getPlayer(params.to_player.c_str());
3584                 if(!player){
3585                         infostream<<"Server::playSound: Player \""<<params.to_player
3586                                         <<"\" not found"<<std::endl;
3587                         return -1;
3588                 }
3589                 if(player->peer_id == PEER_ID_INEXISTENT){
3590                         infostream<<"Server::playSound: Player \""<<params.to_player
3591                                         <<"\" not connected"<<std::endl;
3592                         return -1;
3593                 }
3594                 RemoteClient *client = getClient(player->peer_id);
3595                 dst_clients.insert(client);
3596         }
3597         else
3598         {
3599                 for(core::map<u16, RemoteClient*>::Iterator
3600                                 i = m_clients.getIterator(); i.atEnd() == false; i++)
3601                 {
3602                         RemoteClient *client = i.getNode()->getValue();
3603                         Player *player = m_env->getPlayer(client->peer_id);
3604                         if(!player)
3605                                 continue;
3606                         if(pos_exists){
3607                                 if(player->getPosition().getDistanceFrom(pos) >
3608                                                 params.max_hear_distance)
3609                                         continue;
3610                         }
3611                         dst_clients.insert(client);
3612                 }
3613         }
3614         if(dst_clients.size() == 0)
3615                 return -1;
3616         // Create the sound
3617         s32 id = m_next_sound_id++;
3618         // The sound will exist as a reference in m_playing_sounds
3619         m_playing_sounds[id] = ServerPlayingSound();
3620         ServerPlayingSound &psound = m_playing_sounds[id];
3621         psound.params = params;
3622         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3623                         i != dst_clients.end(); i++)
3624                 psound.clients.insert((*i)->peer_id);
3625         // Create packet
3626         std::ostringstream os(std::ios_base::binary);
3627         writeU16(os, TOCLIENT_PLAY_SOUND);
3628         writeS32(os, id);
3629         os<<serializeString(spec.name);
3630         writeF1000(os, spec.gain * params.gain);
3631         writeU8(os, params.type);
3632         writeV3F1000(os, pos);
3633         writeU16(os, params.object);
3634         writeU8(os, params.loop);
3635         // Make data buffer
3636         std::string s = os.str();
3637         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3638         // Send
3639         for(std::set<RemoteClient*>::iterator i = dst_clients.begin();
3640                         i != dst_clients.end(); i++){
3641                 // Send as reliable
3642                 m_con.Send((*i)->peer_id, 0, data, true);
3643         }
3644         return id;
3645 }
3646 void Server::stopSound(s32 handle)
3647 {
3648         // Get sound reference
3649         std::map<s32, ServerPlayingSound>::iterator i =
3650                         m_playing_sounds.find(handle);
3651         if(i == m_playing_sounds.end())
3652                 return;
3653         ServerPlayingSound &psound = i->second;
3654         // Create packet
3655         std::ostringstream os(std::ios_base::binary);
3656         writeU16(os, TOCLIENT_STOP_SOUND);
3657         writeS32(os, handle);
3658         // Make data buffer
3659         std::string s = os.str();
3660         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
3661         // Send
3662         for(std::set<u16>::iterator i = psound.clients.begin();
3663                         i != psound.clients.end(); i++){
3664                 // Send as reliable
3665                 m_con.Send(*i, 0, data, true);
3666         }
3667         // Remove sound reference
3668         m_playing_sounds.erase(i);
3669 }
3670
3671 void Server::sendRemoveNode(v3s16 p, u16 ignore_id,
3672         core::list<u16> *far_players, float far_d_nodes)
3673 {
3674         float maxd = far_d_nodes*BS;
3675         v3f p_f = intToFloat(p, BS);
3676
3677         // Create packet
3678         u32 replysize = 8;
3679         SharedBuffer<u8> reply(replysize);
3680         writeU16(&reply[0], TOCLIENT_REMOVENODE);
3681         writeS16(&reply[2], p.X);
3682         writeS16(&reply[4], p.Y);
3683         writeS16(&reply[6], p.Z);
3684
3685         for(core::map<u16, RemoteClient*>::Iterator
3686                 i = m_clients.getIterator();
3687                 i.atEnd() == false; i++)
3688         {
3689                 // Get client and check that it is valid
3690                 RemoteClient *client = i.getNode()->getValue();
3691                 assert(client->peer_id == i.getNode()->getKey());
3692                 if(client->serialization_version == SER_FMT_VER_INVALID)
3693                         continue;
3694
3695                 // Don't send if it's the same one
3696                 if(client->peer_id == ignore_id)
3697                         continue;
3698
3699                 if(far_players)
3700                 {
3701                         // Get player
3702                         Player *player = m_env->getPlayer(client->peer_id);
3703                         if(player)
3704                         {
3705                                 // If player is far away, only set modified blocks not sent
3706                                 v3f player_pos = player->getPosition();
3707                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3708                                 {
3709                                         far_players->push_back(client->peer_id);
3710                                         continue;
3711                                 }
3712                         }
3713                 }
3714
3715                 // Send as reliable
3716                 m_con.Send(client->peer_id, 0, reply, true);
3717         }
3718 }
3719
3720 void Server::sendAddNode(v3s16 p, MapNode n, u16 ignore_id,
3721                 core::list<u16> *far_players, float far_d_nodes)
3722 {
3723         float maxd = far_d_nodes*BS;
3724         v3f p_f = intToFloat(p, BS);
3725
3726         for(core::map<u16, RemoteClient*>::Iterator
3727                 i = m_clients.getIterator();
3728                 i.atEnd() == false; i++)
3729         {
3730                 // Get client and check that it is valid
3731                 RemoteClient *client = i.getNode()->getValue();
3732                 assert(client->peer_id == i.getNode()->getKey());
3733                 if(client->serialization_version == SER_FMT_VER_INVALID)
3734                         continue;
3735
3736                 // Don't send if it's the same one
3737                 if(client->peer_id == ignore_id)
3738                         continue;
3739
3740                 if(far_players)
3741                 {
3742                         // Get player
3743                         Player *player = m_env->getPlayer(client->peer_id);
3744                         if(player)
3745                         {
3746                                 // If player is far away, only set modified blocks not sent
3747                                 v3f player_pos = player->getPosition();
3748                                 if(player_pos.getDistanceFrom(p_f) > maxd)
3749                                 {
3750                                         far_players->push_back(client->peer_id);
3751                                         continue;
3752                                 }
3753                         }
3754                 }
3755
3756                 // Create packet
3757                 u32 replysize = 8 + MapNode::serializedLength(client->serialization_version);
3758                 SharedBuffer<u8> reply(replysize);
3759                 writeU16(&reply[0], TOCLIENT_ADDNODE);
3760                 writeS16(&reply[2], p.X);
3761                 writeS16(&reply[4], p.Y);
3762                 writeS16(&reply[6], p.Z);
3763                 n.serialize(&reply[8], client->serialization_version);
3764
3765                 // Send as reliable
3766                 m_con.Send(client->peer_id, 0, reply, true);
3767         }
3768 }
3769
3770 void Server::setBlockNotSent(v3s16 p)
3771 {
3772         for(core::map<u16, RemoteClient*>::Iterator
3773                 i = m_clients.getIterator();
3774                 i.atEnd()==false; i++)
3775         {
3776                 RemoteClient *client = i.getNode()->getValue();
3777                 client->SetBlockNotSent(p);
3778         }
3779 }
3780
3781 void Server::SendBlockNoLock(u16 peer_id, MapBlock *block, u8 ver)
3782 {
3783         DSTACK(__FUNCTION_NAME);
3784
3785         v3s16 p = block->getPos();
3786
3787 #if 0
3788         // Analyze it a bit
3789         bool completely_air = true;
3790         for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
3791         for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
3792         for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
3793         {
3794                 if(block->getNodeNoEx(v3s16(x0,y0,z0)).d != CONTENT_AIR)
3795                 {
3796                         completely_air = false;
3797                         x0 = y0 = z0 = MAP_BLOCKSIZE; // Break out
3798                 }
3799         }
3800
3801         // Print result
3802         infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<"): ";
3803         if(completely_air)
3804                 infostream<<"[completely air] ";
3805         infostream<<std::endl;
3806 #endif
3807
3808         /*
3809                 Create a packet with the block in the right format
3810         */
3811
3812         std::ostringstream os(std::ios_base::binary);
3813         block->serialize(os, ver, false);
3814         std::string s = os.str();
3815         SharedBuffer<u8> blockdata((u8*)s.c_str(), s.size());
3816
3817         u32 replysize = 8 + blockdata.getSize();
3818         SharedBuffer<u8> reply(replysize);
3819         writeU16(&reply[0], TOCLIENT_BLOCKDATA);
3820         writeS16(&reply[2], p.X);
3821         writeS16(&reply[4], p.Y);
3822         writeS16(&reply[6], p.Z);
3823         memcpy(&reply[8], *blockdata, blockdata.getSize());
3824
3825         /*infostream<<"Server: Sending block ("<<p.X<<","<<p.Y<<","<<p.Z<<")"
3826                         <<":  \tpacket size: "<<replysize<<std::endl;*/
3827
3828         /*
3829                 Send packet
3830         */
3831         m_con.Send(peer_id, 1, reply, true);
3832 }
3833
3834 void Server::SendBlocks(float dtime)
3835 {
3836         DSTACK(__FUNCTION_NAME);
3837
3838         JMutexAutoLock envlock(m_env_mutex);
3839         JMutexAutoLock conlock(m_con_mutex);
3840
3841         ScopeProfiler sp(g_profiler, "Server: sel and send blocks to clients");
3842
3843         core::array<PrioritySortedBlockTransfer> queue;
3844
3845         s32 total_sending = 0;
3846
3847         {
3848                 ScopeProfiler sp(g_profiler, "Server: selecting blocks for sending");
3849
3850                 for(core::map<u16, RemoteClient*>::Iterator
3851                         i = m_clients.getIterator();
3852                         i.atEnd() == false; i++)
3853                 {
3854                         RemoteClient *client = i.getNode()->getValue();
3855                         assert(client->peer_id == i.getNode()->getKey());
3856
3857                         // If definitions and textures have not been sent, don't
3858                         // send MapBlocks either
3859                         if(!client->definitions_sent)
3860                                 continue;
3861
3862                         total_sending += client->SendingCount();
3863
3864                         if(client->serialization_version == SER_FMT_VER_INVALID)
3865                                 continue;
3866
3867                         client->GetNextBlocks(this, dtime, queue);
3868                 }
3869         }
3870
3871         // Sort.
3872         // Lowest priority number comes first.
3873         // Lowest is most important.
3874         queue.sort();
3875
3876         for(u32 i=0; i<queue.size(); i++)
3877         {
3878                 //TODO: Calculate limit dynamically
3879                 if(total_sending >= g_settings->getS32
3880                                 ("max_simultaneous_block_sends_server_total"))
3881                         break;
3882
3883                 PrioritySortedBlockTransfer q = queue[i];
3884
3885                 MapBlock *block = NULL;
3886                 try
3887                 {
3888                         block = m_env->getMap().getBlockNoCreate(q.pos);
3889                 }
3890                 catch(InvalidPositionException &e)
3891                 {
3892                         continue;
3893                 }
3894
3895                 RemoteClient *client = getClient(q.peer_id);
3896
3897                 SendBlockNoLock(q.peer_id, block, client->serialization_version);
3898
3899                 client->SentBlock(q.pos);
3900
3901                 total_sending++;
3902         }
3903 }
3904
3905 void Server::fillMediaCache()
3906 {
3907         DSTACK(__FUNCTION_NAME);
3908
3909         infostream<<"Server: Calculating media file checksums"<<std::endl;
3910
3911         // Collect all media file paths
3912         std::list<std::string> paths;
3913         for(core::list<ModSpec>::Iterator i = m_mods.begin();
3914                         i != m_mods.end(); i++){
3915                 const ModSpec &mod = *i;
3916                 paths.push_back(mod.path + DIR_DELIM + "textures");
3917                 paths.push_back(mod.path + DIR_DELIM + "sounds");
3918                 paths.push_back(mod.path + DIR_DELIM + "media");
3919         }
3920
3921         // Collect media file information from paths into cache
3922         for(std::list<std::string>::iterator i = paths.begin();
3923                         i != paths.end(); i++)
3924         {
3925                 std::string mediapath = *i;
3926                 std::vector<fs::DirListNode> dirlist = fs::GetDirListing(mediapath);
3927                 for(u32 j=0; j<dirlist.size(); j++){
3928                         if(dirlist[j].dir) // Ignode dirs
3929                                 continue;
3930                         std::string filename = dirlist[j].name;
3931                         // If name contains illegal characters, ignore the file
3932                         if(!string_allowed(filename, TEXTURENAME_ALLOWED_CHARS)){
3933                                 infostream<<"Server: ignoring illegal file name: \""
3934                                                 <<filename<<"\""<<std::endl;
3935                                 continue;
3936                         }
3937                         // If name is not in a supported format, ignore it
3938                         const char *supported_ext[] = {
3939                                 ".png", ".jpg", ".bmp", ".tga",
3940                                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
3941                                 ".ogg",
3942                                 NULL
3943                         };
3944                         if(removeStringEnd(filename, supported_ext) == ""){
3945                                 infostream<<"Server: ignoring unsupported file extension: \""
3946                                                 <<filename<<"\""<<std::endl;
3947                                 continue;
3948                         }
3949                         // Ok, attempt to load the file and add to cache
3950                         std::string filepath = mediapath + DIR_DELIM + filename;
3951                         // Read data
3952                         std::ifstream fis(filepath.c_str(), std::ios_base::binary);
3953                         if(fis.good() == false){
3954                                 errorstream<<"Server::fillMediaCache(): Could not open \""
3955                                                 <<filename<<"\" for reading"<<std::endl;
3956                                 continue;
3957                         }
3958                         std::ostringstream tmp_os(std::ios_base::binary);
3959                         bool bad = false;
3960                         for(;;){
3961                                 char buf[1024];
3962                                 fis.read(buf, 1024);
3963                                 std::streamsize len = fis.gcount();
3964                                 tmp_os.write(buf, len);
3965                                 if(fis.eof())
3966                                         break;
3967                                 if(!fis.good()){
3968                                         bad = true;
3969                                         break;
3970                                 }
3971                         }
3972                         if(bad){
3973                                 errorstream<<"Server::fillMediaCache(): Failed to read \""
3974                                                 <<filename<<"\""<<std::endl;
3975                                 continue;
3976                         }
3977                         if(tmp_os.str().length() == 0){
3978                                 errorstream<<"Server::fillMediaCache(): Empty file \""
3979                                                 <<filepath<<"\""<<std::endl;
3980                                 continue;
3981                         }
3982
3983                         SHA1 sha1;
3984                         sha1.addBytes(tmp_os.str().c_str(), tmp_os.str().length());
3985
3986                         unsigned char *digest = sha1.getDigest();
3987                         std::string sha1_base64 = base64_encode(digest, 20);
3988                         std::string sha1_hex = hex_encode((char*)digest, 20);
3989                         free(digest);
3990
3991                         // Put in list
3992                         this->m_media[filename] = MediaInfo(filepath, sha1_base64);
3993                         verbosestream<<"Server: "<<sha1_hex<<" is "<<filename<<std::endl;
3994                 }
3995         }
3996 }
3997
3998 struct SendableMediaAnnouncement
3999 {
4000         std::string name;
4001         std::string sha1_digest;
4002
4003         SendableMediaAnnouncement(const std::string name_="",
4004                         const std::string sha1_digest_=""):
4005                 name(name_),
4006                 sha1_digest(sha1_digest_)
4007         {}
4008 };
4009
4010 void Server::sendMediaAnnouncement(u16 peer_id)
4011 {
4012         DSTACK(__FUNCTION_NAME);
4013
4014         verbosestream<<"Server: Announcing files to id("<<peer_id<<")"
4015                         <<std::endl;
4016
4017         core::list<SendableMediaAnnouncement> file_announcements;
4018
4019         for(std::map<std::string, MediaInfo>::iterator i = m_media.begin();
4020                         i != m_media.end(); i++){
4021                 // Put in list
4022                 file_announcements.push_back(
4023                                 SendableMediaAnnouncement(i->first, i->second.sha1_digest));
4024         }
4025
4026         // Make packet
4027         std::ostringstream os(std::ios_base::binary);
4028
4029         /*
4030                 u16 command
4031                 u32 number of files
4032                 for each texture {
4033                         u16 length of name
4034                         string name
4035                         u16 length of sha1_digest
4036                         string sha1_digest
4037                 }
4038         */
4039
4040         writeU16(os, TOCLIENT_ANNOUNCE_MEDIA);
4041         writeU16(os, file_announcements.size());
4042
4043         for(core::list<SendableMediaAnnouncement>::Iterator
4044                         j = file_announcements.begin();
4045                         j != file_announcements.end(); j++){
4046                 os<<serializeString(j->name);
4047                 os<<serializeString(j->sha1_digest);
4048         }
4049
4050         // Make data buffer
4051         std::string s = os.str();
4052         SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4053
4054         // Send as reliable
4055         m_con.Send(peer_id, 0, data, true);
4056
4057 }
4058
4059 struct SendableMedia
4060 {
4061         std::string name;
4062         std::string path;
4063         std::string data;
4064
4065         SendableMedia(const std::string &name_="", const std::string path_="",
4066                         const std::string &data_=""):
4067                 name(name_),
4068                 path(path_),
4069                 data(data_)
4070         {}
4071 };
4072
4073 void Server::sendRequestedMedia(u16 peer_id,
4074                 const core::list<MediaRequest> &tosend)
4075 {
4076         DSTACK(__FUNCTION_NAME);
4077
4078         verbosestream<<"Server::sendRequestedMedia(): "
4079                         <<"Sending files to client"<<std::endl;
4080
4081         /* Read files */
4082
4083         // Put 5kB in one bunch (this is not accurate)
4084         u32 bytes_per_bunch = 5000;
4085
4086         core::array< core::list<SendableMedia> > file_bunches;
4087         file_bunches.push_back(core::list<SendableMedia>());
4088
4089         u32 file_size_bunch_total = 0;
4090
4091         for(core::list<MediaRequest>::ConstIterator i = tosend.begin();
4092                         i != tosend.end(); i++)
4093         {
4094                 if(m_media.find(i->name) == m_media.end()){
4095                         errorstream<<"Server::sendRequestedMedia(): Client asked for "
4096                                         <<"unknown file \""<<(i->name)<<"\""<<std::endl;
4097                         continue;
4098                 }
4099
4100                 //TODO get path + name
4101                 std::string tpath = m_media[(*i).name].path;
4102
4103                 // Read data
4104                 std::ifstream fis(tpath.c_str(), std::ios_base::binary);
4105                 if(fis.good() == false){
4106                         errorstream<<"Server::sendRequestedMedia(): Could not open \""
4107                                         <<tpath<<"\" for reading"<<std::endl;
4108                         continue;
4109                 }
4110                 std::ostringstream tmp_os(std::ios_base::binary);
4111                 bool bad = false;
4112                 for(;;){
4113                         char buf[1024];
4114                         fis.read(buf, 1024);
4115                         std::streamsize len = fis.gcount();
4116                         tmp_os.write(buf, len);
4117                         file_size_bunch_total += len;
4118                         if(fis.eof())
4119                                 break;
4120                         if(!fis.good()){
4121                                 bad = true;
4122                                 break;
4123                         }
4124                 }
4125                 if(bad){
4126                         errorstream<<"Server::sendRequestedMedia(): Failed to read \""
4127                                         <<(*i).name<<"\""<<std::endl;
4128                         continue;
4129                 }
4130                 /*infostream<<"Server::sendRequestedMedia(): Loaded \""
4131                                 <<tname<<"\""<<std::endl;*/
4132                 // Put in list
4133                 file_bunches[file_bunches.size()-1].push_back(
4134                                 SendableMedia((*i).name, tpath, tmp_os.str()));
4135
4136                 // Start next bunch if got enough data
4137                 if(file_size_bunch_total >= bytes_per_bunch){
4138                         file_bunches.push_back(core::list<SendableMedia>());
4139                         file_size_bunch_total = 0;
4140                 }
4141
4142         }
4143
4144         /* Create and send packets */
4145
4146         u32 num_bunches = file_bunches.size();
4147         for(u32 i=0; i<num_bunches; i++)
4148         {
4149                 std::ostringstream os(std::ios_base::binary);
4150
4151                 /*
4152                         u16 command
4153                         u16 total number of texture bunches
4154                         u16 index of this bunch
4155                         u32 number of files in this bunch
4156                         for each file {
4157                                 u16 length of name
4158                                 string name
4159                                 u32 length of data
4160                                 data
4161                         }
4162                 */
4163
4164                 writeU16(os, TOCLIENT_MEDIA);
4165                 writeU16(os, num_bunches);
4166                 writeU16(os, i);
4167                 writeU32(os, file_bunches[i].size());
4168
4169                 for(core::list<SendableMedia>::Iterator
4170                                 j = file_bunches[i].begin();
4171                                 j != file_bunches[i].end(); j++){
4172                         os<<serializeString(j->name);
4173                         os<<serializeLongString(j->data);
4174                 }
4175
4176                 // Make data buffer
4177                 std::string s = os.str();
4178                 verbosestream<<"Server::sendRequestedMedia(): bunch "
4179                                 <<i<<"/"<<num_bunches
4180                                 <<" files="<<file_bunches[i].size()
4181                                 <<" size=" <<s.size()<<std::endl;
4182                 SharedBuffer<u8> data((u8*)s.c_str(), s.size());
4183                 // Send as reliable
4184                 m_con.Send(peer_id, 0, data, true);
4185         }
4186 }
4187
4188 /*
4189         Something random
4190 */
4191
4192 void Server::DiePlayer(u16 peer_id)
4193 {
4194         DSTACK(__FUNCTION_NAME);
4195
4196         PlayerSAO *playersao = getPlayerSAO(peer_id);
4197         assert(playersao);
4198
4199         infostream<<"Server::DiePlayer(): Player "
4200                         <<playersao->getPlayer()->getName()
4201                         <<" dies"<<std::endl;
4202
4203         playersao->setHP(0);
4204
4205         // Trigger scripted stuff
4206         scriptapi_on_dieplayer(m_lua, playersao);
4207
4208         SendPlayerHP(peer_id);
4209         SendDeathscreen(m_con, peer_id, false, v3f(0,0,0));
4210 }
4211
4212 void Server::RespawnPlayer(u16 peer_id)
4213 {
4214         DSTACK(__FUNCTION_NAME);
4215
4216         PlayerSAO *playersao = getPlayerSAO(peer_id);
4217         assert(playersao);
4218
4219         infostream<<"Server::RespawnPlayer(): Player "
4220                         <<playersao->getPlayer()->getName()
4221                         <<" respawns"<<std::endl;
4222
4223         playersao->setHP(PLAYER_MAX_HP);
4224
4225         bool repositioned = scriptapi_on_respawnplayer(m_lua, playersao);
4226         if(!repositioned){
4227                 v3f pos = findSpawnPos(m_env->getServerMap());
4228                 playersao->setPos(pos);
4229         }
4230 }
4231
4232 void Server::UpdateCrafting(u16 peer_id)
4233 {
4234         DSTACK(__FUNCTION_NAME);
4235
4236         Player* player = m_env->getPlayer(peer_id);
4237         assert(player);
4238
4239         // Get a preview for crafting
4240         ItemStack preview;
4241         // No crafting in creative mode
4242         if(g_settings->getBool("creative_mode") == false)
4243                 getCraftingResult(&player->inventory, preview, false, this);
4244
4245         // Put the new preview in
4246         InventoryList *plist = player->inventory.getList("craftpreview");
4247         assert(plist);
4248         assert(plist->getSize() >= 1);
4249         plist->changeItem(0, preview);
4250 }
4251
4252 RemoteClient* Server::getClient(u16 peer_id)
4253 {
4254         DSTACK(__FUNCTION_NAME);
4255         //JMutexAutoLock lock(m_con_mutex);
4256         core::map<u16, RemoteClient*>::Node *n;
4257         n = m_clients.find(peer_id);
4258         // A client should exist for all peers
4259         assert(n != NULL);
4260         return n->getValue();
4261 }
4262
4263 std::wstring Server::getStatusString()
4264 {
4265         std::wostringstream os(std::ios_base::binary);
4266         os<<L"# Server: ";
4267         // Version
4268         os<<L"version="<<narrow_to_wide(VERSION_STRING);
4269         // Uptime
4270         os<<L", uptime="<<m_uptime.get();
4271         // Information about clients
4272         os<<L", clients={";
4273         for(core::map<u16, RemoteClient*>::Iterator
4274                 i = m_clients.getIterator();
4275                 i.atEnd() == false; i++)
4276         {
4277                 // Get client and check that it is valid
4278                 RemoteClient *client = i.getNode()->getValue();
4279                 assert(client->peer_id == i.getNode()->getKey());
4280                 if(client->serialization_version == SER_FMT_VER_INVALID)
4281                         continue;
4282                 // Get player
4283                 Player *player = m_env->getPlayer(client->peer_id);
4284                 // Get name of player
4285                 std::wstring name = L"unknown";
4286                 if(player != NULL)
4287                         name = narrow_to_wide(player->getName());
4288                 // Add name to information string
4289                 os<<name<<L",";
4290         }
4291         os<<L"}";
4292         if(((ServerMap*)(&m_env->getMap()))->isSavingEnabled() == false)
4293                 os<<std::endl<<L"# Server: "<<" WARNING: Map saving is disabled.";
4294         if(g_settings->get("motd") != "")
4295                 os<<std::endl<<L"# Server: "<<narrow_to_wide(g_settings->get("motd"));
4296         return os.str();
4297 }
4298
4299 std::set<std::string> Server::getPlayerEffectivePrivs(const std::string &name)
4300 {
4301         std::set<std::string> privs;
4302         scriptapi_get_auth(m_lua, name, NULL, &privs);
4303         return privs;
4304 }
4305
4306 bool Server::checkPriv(const std::string &name, const std::string &priv)
4307 {
4308         std::set<std::string> privs = getPlayerEffectivePrivs(name);
4309         return (privs.count(priv) != 0);
4310 }
4311
4312 void Server::reportPrivsModified(const std::string &name)
4313 {
4314         if(name == ""){
4315                 for(core::map<u16, RemoteClient*>::Iterator
4316                                 i = m_clients.getIterator();
4317                                 i.atEnd() == false; i++){
4318                         RemoteClient *client = i.getNode()->getValue();
4319                         Player *player = m_env->getPlayer(client->peer_id);
4320                         reportPrivsModified(player->getName());
4321                 }
4322         } else {
4323                 Player *player = m_env->getPlayer(name.c_str());
4324                 if(!player)
4325                         return;
4326                 SendPlayerPrivileges(player->peer_id);
4327                 PlayerSAO *sao = player->getPlayerSAO();
4328                 if(!sao)
4329                         return;
4330                 sao->updatePrivileges(
4331                                 getPlayerEffectivePrivs(name),
4332                                 isSingleplayer());
4333         }
4334 }
4335
4336 // Saves g_settings to configpath given at initialization
4337 void Server::saveConfig()
4338 {
4339         if(m_path_config != "")
4340                 g_settings->updateConfigFile(m_path_config.c_str());
4341 }
4342
4343 void Server::notifyPlayer(const char *name, const std::wstring msg)
4344 {
4345         Player *player = m_env->getPlayer(name);
4346         if(!player)
4347                 return;
4348         SendChatMessage(player->peer_id, std::wstring(L"Server: -!- ")+msg);
4349 }
4350
4351 void Server::notifyPlayers(const std::wstring msg)
4352 {
4353         BroadcastChatMessage(msg);
4354 }
4355
4356 void Server::queueBlockEmerge(v3s16 blockpos, bool allow_generate)
4357 {
4358         u8 flags = 0;
4359         if(!allow_generate)
4360                 flags |= BLOCK_EMERGE_FLAG_FROMDISK;
4361         m_emerge_queue.addBlock(PEER_ID_INEXISTENT, blockpos, flags);
4362 }
4363
4364 // IGameDef interface
4365 // Under envlock
4366 IItemDefManager* Server::getItemDefManager()
4367 {
4368         return m_itemdef;
4369 }
4370 INodeDefManager* Server::getNodeDefManager()
4371 {
4372         return m_nodedef;
4373 }
4374 ICraftDefManager* Server::getCraftDefManager()
4375 {
4376         return m_craftdef;
4377 }
4378 ITextureSource* Server::getTextureSource()
4379 {
4380         return NULL;
4381 }
4382 u16 Server::allocateUnknownNodeId(const std::string &name)
4383 {
4384         return m_nodedef->allocateDummy(name);
4385 }
4386 ISoundManager* Server::getSoundManager()
4387 {
4388         return &dummySoundManager;
4389 }
4390 MtEventManager* Server::getEventManager()
4391 {
4392         return m_event;
4393 }
4394
4395 IWritableItemDefManager* Server::getWritableItemDefManager()
4396 {
4397         return m_itemdef;
4398 }
4399 IWritableNodeDefManager* Server::getWritableNodeDefManager()
4400 {
4401         return m_nodedef;
4402 }
4403 IWritableCraftDefManager* Server::getWritableCraftDefManager()
4404 {
4405         return m_craftdef;
4406 }
4407
4408 const ModSpec* Server::getModSpec(const std::string &modname)
4409 {
4410         for(core::list<ModSpec>::Iterator i = m_mods.begin();
4411                         i != m_mods.end(); i++){
4412                 const ModSpec &mod = *i;
4413                 if(mod.name == modname)
4414                         return &mod;
4415         }
4416         return NULL;
4417 }
4418 std::string Server::getBuiltinLuaPath()
4419 {
4420         return porting::path_share + DIR_DELIM + "builtin";
4421 }
4422
4423 v3f findSpawnPos(ServerMap &map)
4424 {
4425         //return v3f(50,50,50)*BS;
4426
4427         v3s16 nodepos;
4428
4429 #if 0
4430         nodepos = v2s16(0,0);
4431         groundheight = 20;
4432 #endif
4433
4434 #if 1
4435         // Try to find a good place a few times
4436         for(s32 i=0; i<1000; i++)
4437         {
4438                 s32 range = 1 + i;
4439                 // We're going to try to throw the player to this position
4440                 v2s16 nodepos2d = v2s16(-range + (myrand()%(range*2)),
4441                                 -range + (myrand()%(range*2)));
4442                 //v2s16 sectorpos = getNodeSectorPos(nodepos2d);
4443                 // Get ground height at point (fallbacks to heightmap function)
4444                 s16 groundheight = map.findGroundLevel(nodepos2d);
4445                 // Don't go underwater
4446                 if(groundheight < WATER_LEVEL)
4447                 {
4448                         //infostream<<"-> Underwater"<<std::endl;
4449                         continue;
4450                 }
4451                 // Don't go to high places
4452                 if(groundheight > WATER_LEVEL + 4)
4453                 {
4454                         //infostream<<"-> Underwater"<<std::endl;
4455                         continue;
4456                 }
4457
4458                 nodepos = v3s16(nodepos2d.X, groundheight-2, nodepos2d.Y);
4459                 bool is_good = false;
4460                 s32 air_count = 0;
4461                 for(s32 i=0; i<10; i++){
4462                         v3s16 blockpos = getNodeBlockPos(nodepos);
4463                         map.emergeBlock(blockpos, true);
4464                         MapNode n = map.getNodeNoEx(nodepos);
4465                         if(n.getContent() == CONTENT_AIR){
4466                                 air_count++;
4467                                 if(air_count >= 2){
4468                                         is_good = true;
4469                                         nodepos.Y -= 1;
4470                                         break;
4471                                 }
4472                         }
4473                         nodepos.Y++;
4474                 }
4475                 if(is_good){
4476                         // Found a good place
4477                         //infostream<<"Searched through "<<i<<" places."<<std::endl;
4478                         break;
4479                 }
4480         }
4481 #endif
4482
4483         return intToFloat(nodepos, BS);
4484 }
4485
4486 PlayerSAO* Server::emergePlayer(const char *name, u16 peer_id)
4487 {
4488         RemotePlayer *player = NULL;
4489         bool newplayer = false;
4490
4491         /*
4492                 Try to get an existing player
4493         */
4494         player = static_cast<RemotePlayer*>(m_env->getPlayer(name));
4495
4496         // If player is already connected, cancel
4497         if(player != NULL && player->peer_id != 0)
4498         {
4499                 infostream<<"emergePlayer(): Player already connected"<<std::endl;
4500                 return NULL;
4501         }
4502
4503         /*
4504                 If player with the wanted peer_id already exists, cancel.
4505         */
4506         if(m_env->getPlayer(peer_id) != NULL)
4507         {
4508                 infostream<<"emergePlayer(): Player with wrong name but same"
4509                                 " peer_id already exists"<<std::endl;
4510                 return NULL;
4511         }
4512
4513         /*
4514                 Create a new player if it doesn't exist yet
4515         */
4516         if(player == NULL)
4517         {
4518                 newplayer = true;
4519                 player = new RemotePlayer(this);
4520                 player->updateName(name);
4521
4522                 /* Set player position */
4523                 infostream<<"Server: Finding spawn place for player \""
4524                                 <<name<<"\""<<std::endl;
4525                 v3f pos = findSpawnPos(m_env->getServerMap());
4526                 player->setPosition(pos);
4527
4528                 /* Add player to environment */
4529                 m_env->addPlayer(player);
4530         }
4531
4532         /*
4533                 Create a new player active object
4534         */
4535         PlayerSAO *playersao = new PlayerSAO(m_env, player, peer_id,
4536                         getPlayerEffectivePrivs(player->getName()),
4537                         isSingleplayer());
4538
4539         /* Add object to environment */
4540         m_env->addActiveObject(playersao);
4541
4542         /* Run scripts */
4543         if(newplayer)
4544                 scriptapi_on_newplayer(m_lua, playersao);
4545
4546         scriptapi_on_joinplayer(m_lua, playersao);
4547
4548         /* Creative mode */
4549         if(g_settings->getBool("creative_mode"))
4550                 playersao->createCreativeInventory();
4551
4552         return playersao;
4553 }
4554
4555 void Server::handlePeerChange(PeerChange &c)
4556 {
4557         JMutexAutoLock envlock(m_env_mutex);
4558         JMutexAutoLock conlock(m_con_mutex);
4559
4560         if(c.type == PEER_ADDED)
4561         {
4562                 /*
4563                         Add
4564                 */
4565
4566                 // Error check
4567                 core::map<u16, RemoteClient*>::Node *n;
4568                 n = m_clients.find(c.peer_id);
4569                 // The client shouldn't already exist
4570                 assert(n == NULL);
4571
4572                 // Create client
4573                 RemoteClient *client = new RemoteClient();
4574                 client->peer_id = c.peer_id;
4575                 m_clients.insert(client->peer_id, client);
4576
4577         } // PEER_ADDED
4578         else if(c.type == PEER_REMOVED)
4579         {
4580                 /*
4581                         Delete
4582                 */
4583
4584                 // Error check
4585                 core::map<u16, RemoteClient*>::Node *n;
4586                 n = m_clients.find(c.peer_id);
4587                 // The client should exist
4588                 assert(n != NULL);
4589
4590                 /*
4591                         Mark objects to be not known by the client
4592                 */
4593                 RemoteClient *client = n->getValue();
4594                 // Handle objects
4595                 for(core::map<u16, bool>::Iterator
4596                                 i = client->m_known_objects.getIterator();
4597                                 i.atEnd()==false; i++)
4598                 {
4599                         // Get object
4600                         u16 id = i.getNode()->getKey();
4601                         ServerActiveObject* obj = m_env->getActiveObject(id);
4602
4603                         if(obj && obj->m_known_by_count > 0)
4604                                 obj->m_known_by_count--;
4605                 }
4606
4607                 /*
4608                         Clear references to playing sounds
4609                 */
4610                 for(std::map<s32, ServerPlayingSound>::iterator
4611                                 i = m_playing_sounds.begin();
4612                                 i != m_playing_sounds.end();)
4613                 {
4614                         ServerPlayingSound &psound = i->second;
4615                         psound.clients.erase(c.peer_id);
4616                         if(psound.clients.size() == 0)
4617                                 m_playing_sounds.erase(i++);
4618                         else
4619                                 i++;
4620                 }
4621
4622                 Player *player = m_env->getPlayer(c.peer_id);
4623
4624                 // Collect information about leaving in chat
4625                 std::wstring message;
4626                 {
4627                         if(player != NULL)
4628                         {
4629                                 std::wstring name = narrow_to_wide(player->getName());
4630                                 message += L"*** ";
4631                                 message += name;
4632                                 message += L" left game";
4633                                 if(c.timeout)
4634                                         message += L" (timed out)";
4635                         }
4636                 }
4637
4638                 /* Run scripts and remove from environment */
4639                 {
4640                         if(player != NULL)
4641                         {
4642                                 PlayerSAO *playersao = player->getPlayerSAO();
4643                                 assert(playersao);
4644
4645                                 scriptapi_on_leaveplayer(m_lua, playersao);
4646
4647                                 playersao->disconnected();
4648                         }
4649                 }
4650
4651                 /*
4652                         Print out action
4653                 */
4654                 {
4655                         if(player != NULL)
4656                         {
4657                                 std::ostringstream os(std::ios_base::binary);
4658                                 for(core::map<u16, RemoteClient*>::Iterator
4659                                         i = m_clients.getIterator();
4660                                         i.atEnd() == false; i++)
4661                                 {
4662                                         RemoteClient *client = i.getNode()->getValue();
4663                                         assert(client->peer_id == i.getNode()->getKey());
4664                                         if(client->serialization_version == SER_FMT_VER_INVALID)
4665                                                 continue;
4666                                         // Get player
4667                                         Player *player = m_env->getPlayer(client->peer_id);
4668                                         if(!player)
4669                                                 continue;
4670                                         // Get name of player
4671                                         os<<player->getName()<<" ";
4672                                 }
4673
4674                                 actionstream<<player->getName()<<" "
4675                                                 <<(c.timeout?"times out.":"leaves game.")
4676                                                 <<" List of players: "
4677                                                 <<os.str()<<std::endl;
4678                         }
4679                 }
4680
4681                 // Delete client
4682                 delete m_clients[c.peer_id];
4683                 m_clients.remove(c.peer_id);
4684
4685                 // Send player info to all remaining clients
4686                 //SendPlayerInfos();
4687
4688                 // Send leave chat message to all remaining clients
4689                 if(message.length() != 0)
4690                         BroadcastChatMessage(message);
4691
4692         } // PEER_REMOVED
4693         else
4694         {
4695                 assert(0);
4696         }
4697 }
4698
4699 void Server::handlePeerChanges()
4700 {
4701         while(m_peer_change_queue.size() > 0)
4702         {
4703                 PeerChange c = m_peer_change_queue.pop_front();
4704
4705                 verbosestream<<"Server: Handling peer change: "
4706                                 <<"id="<<c.peer_id<<", timeout="<<c.timeout
4707                                 <<std::endl;
4708
4709                 handlePeerChange(c);
4710         }
4711 }
4712
4713 void dedicated_server_loop(Server &server, bool &kill)
4714 {
4715         DSTACK(__FUNCTION_NAME);
4716
4717         verbosestream<<"dedicated_server_loop()"<<std::endl;
4718
4719         IntervalLimiter m_profiler_interval;
4720
4721         for(;;)
4722         {
4723                 float steplen = g_settings->getFloat("dedicated_server_step");
4724                 // This is kind of a hack but can be done like this
4725                 // because server.step() is very light
4726                 {
4727                         ScopeProfiler sp(g_profiler, "dedicated server sleep");
4728                         sleep_ms((int)(steplen*1000.0));
4729                 }
4730                 server.step(steplen);
4731
4732                 if(server.getShutdownRequested() || kill)
4733                 {
4734                         infostream<<"Dedicated server quitting"<<std::endl;
4735                         break;
4736                 }
4737
4738                 /*
4739                         Profiler
4740                 */
4741                 float profiler_print_interval =
4742                                 g_settings->getFloat("profiler_print_interval");
4743                 if(profiler_print_interval != 0)
4744                 {
4745                         if(m_profiler_interval.step(steplen, profiler_print_interval))
4746                         {
4747                                 infostream<<"Profiler:"<<std::endl;
4748                                 g_profiler->print(infostream);
4749                                 g_profiler->clear();
4750                         }
4751                 }
4752         }
4753 }
4754
4755