src/clientiface.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2014 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 <sstream>
  21
  22 #include "clientiface.h"
  23 #include "player.h"
  24 #include "settings.h"
  25 #include "mapblock.h"
  26 #include "connection.h"
  27 #include "environment.h"
  28 #include "map.h"
  29 #include "emerge.h"
  30 #include "serverobject.h"              // TODO this is used for cleanup of only
  31
  32 #include "util/numeric.h"
  33 #include "util/mathconstants.h"
  34
  35 #include "main.h"                      // for g_settings
  36
  37 const char *ClientInterface::statenames[] = {
  38         "Invalid",
  39         "Disconnecting",
  40         "Denied",
  41         "Created",
  42         "InitSent",
  43         "InitDone",
  44         "DefinitionsSent",
  45         "Active"
  46 };
  47
  48
  49
  50 std::string ClientInterface::state2Name(ClientState state)
  51 {
  52         return statenames[state];
  53 }
  54
  55 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  56 {
  57         // if this block is on wire, mark it for sending again as soon as possible
  58         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  59                 SetBlockNotSent(p);
  60         }
  61 }
  62
  63 void RemoteClient::GetNextBlocks(
  64                 ServerEnvironment *env,
  65                 EmergeManager * emerge,
  66                 float dtime,
  67                 std::vector<PrioritySortedBlockTransfer> &dest)
  68 {
  69         DSTACK(__FUNCTION_NAME);
  70
  71
  72         // Increment timers
  73         m_nothing_to_send_pause_timer -= dtime;
  74         m_nearest_unsent_reset_timer += dtime;
  75
  76         if(m_nothing_to_send_pause_timer >= 0)
  77                 return;
  78
  79         Player *player = env->getPlayer(peer_id);
  80         // This can happen sometimes; clients and players are not in perfect sync.
  81         if(player == NULL)
  82                 return;
  83
  84         // Won't send anything if already sending
  85         if(m_blocks_sending.size() >= g_settings->getU16
  86                         ("max_simultaneous_block_sends_per_client"))
  87         {
  88                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  89                 return;
  90         }
  91
  92         v3f playerpos = player->getPosition();
  93         v3f playerspeed = player->getSpeed();
  94         v3f playerspeeddir(0,0,0);
  95         if(playerspeed.getLength() > 1.0*BS)
  96                 playerspeeddir = playerspeed / playerspeed.getLength();
  97         // Predict to next block
  98         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
  99
 100         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 101
 102         v3s16 center = getNodeBlockPos(center_nodepos);
 103
 104         // Camera position and direction
 105         v3f camera_pos = player->getEyePosition();
 106         v3f camera_dir = v3f(0,0,1);
 107         camera_dir.rotateYZBy(player->getPitch());
 108         camera_dir.rotateXZBy(player->getYaw());
 109
 110         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 111                         <<camera_dir.Z<<")"<<std::endl;*/
 112
 113         /*
 114                 Get the starting value of the block finder radius.
 115         */
 116
 117         if(m_last_center != center)
 118         {
 119                 m_nearest_unsent_d = 0;
 120                 m_last_center = center;
 121         }
 122
 123         /*infostream<<"m_nearest_unsent_reset_timer="
 124                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 125
 126         // Reset periodically to workaround for some bugs or stuff
 127         if(m_nearest_unsent_reset_timer > 20.0)
 128         {
 129                 m_nearest_unsent_reset_timer = 0;
 130                 m_nearest_unsent_d = 0;
 131                 //infostream<<"Resetting m_nearest_unsent_d for "
 132                 //              <<server->getPlayerName(peer_id)<<std::endl;
 133         }
 134
 135         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 136         s16 d_start = m_nearest_unsent_d;
 137
 138         //infostream<<"d_start="<<d_start<<std::endl;
 139
 140         u16 max_simul_sends_setting = g_settings->getU16
 141                         ("max_simultaneous_block_sends_per_client");
 142         u16 max_simul_sends_usually = max_simul_sends_setting;
 143
 144         /*
 145                 Check the time from last addNode/removeNode.
 146
 147                 Decrease send rate if player is building stuff.
 148         */
 149         m_time_from_building += dtime;
 150         if(m_time_from_building < g_settings->getFloat(
 151                                 "full_block_send_enable_min_time_from_building"))
 152         {
 153                 max_simul_sends_usually
 154                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 155         }
 156
 157         /*
 158                 Number of blocks sending + number of blocks selected for sending
 159         */
 160         u32 num_blocks_selected = m_blocks_sending.size();
 161
 162         /*
 163                 next time d will be continued from the d from which the nearest
 164                 unsent block was found this time.
 165
 166                 This is because not necessarily any of the blocks found this
 167                 time are actually sent.
 168         */
 169         s32 new_nearest_unsent_d = -1;
 170
 171         const s16 full_d_max = g_settings->getS16("max_block_send_distance");
 172         s16 d_max = full_d_max;
 173         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 174
 175         // Don't loop very much at a time
 176         s16 max_d_increment_at_time = 2;
 177         if(d_max > d_start + max_d_increment_at_time)
 178                 d_max = d_start + max_d_increment_at_time;
 179
 180         s32 nearest_emerged_d = -1;
 181         s32 nearest_emergefull_d = -1;
 182         s32 nearest_sent_d = -1;
 183         bool queue_is_full = false;
 184
 185         s16 d;
 186         for(d = d_start; d <= d_max; d++)
 187         {
 188                 /*
 189                         Get the border/face dot coordinates of a "d-radiused"
 190                         box
 191                 */
 192                 std::list<v3s16> list;
 193                 getFacePositions(list, d);
 194
 195                 std::list<v3s16>::iterator li;
 196                 for(li=list.begin(); li!=list.end(); ++li)
 197                 {
 198                         v3s16 p = *li + center;
 199
 200                         /*
 201                                 Send throttling
 202                                 - Don't allow too many simultaneous transfers
 203                                 - EXCEPT when the blocks are very close
 204
 205                                 Also, don't send blocks that are already flying.
 206                         */
 207
 208                         // Start with the usual maximum
 209                         u16 max_simul_dynamic = max_simul_sends_usually;
 210
 211                         // If block is very close, allow full maximum
 212                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 213                                 max_simul_dynamic = max_simul_sends_setting;
 214
 215                         // Don't select too many blocks for sending
 216                         if(num_blocks_selected >= max_simul_dynamic)
 217                         {
 218                                 queue_is_full = true;
 219                                 goto queue_full_break;
 220                         }
 221
 222                         // Don't send blocks that are currently being transferred
 223                         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 224                                 continue;
 225
 226                         /*
 227                                 Do not go over-limit
 228                         */
 229                         if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 230                         || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 231                         || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 232                         || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 233                         || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
 234                         || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
 235                                 continue;
 236
 237                         // If this is true, inexistent block will be made from scratch
 238                         bool generate = d <= d_max_gen;
 239
 240                         {
 241                                 /*// Limit the generating area vertically to 2/3
 242                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 243                                         generate = false;*/
 244
 245                                 // Limit the send area vertically to 1/2
 246                                 if(abs(p.Y - center.Y) > full_d_max / 2)
 247                                         continue;
 248                         }
 249
 250                         /*
 251                                 Don't generate or send if not in sight
 252                                 FIXME This only works if the client uses a small enough
 253                                 FOV setting. The default of 72 degrees is fine.
 254                         */
 255
 256                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 257                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 258                         {
 259                                 continue;
 260                         }
 261
 262                         /*
 263                                 Don't send already sent blocks
 264                         */
 265                         {
 266                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 267                                 {
 268                                         continue;
 269                                 }
 270                         }
 271
 272                         /*
 273                                 Check if map has this block
 274                         */
 275                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 276
 277                         bool surely_not_found_on_disk = false;
 278                         bool block_is_invalid = false;
 279                         if(block != NULL)
 280                         {
 281                                 // Reset usage timer, this block will be of use in the future.
 282                                 block->resetUsageTimer();
 283
 284                                 // Block is dummy if data doesn't exist.
 285                                 // It means it has been not found from disk and not generated
 286                                 if(block->isDummy())
 287                                 {
 288                                         surely_not_found_on_disk = true;
 289                                 }
 290
 291                                 // Block is valid if lighting is up-to-date and data exists
 292                                 if(block->isValid() == false)
 293                                 {
 294                                         block_is_invalid = true;
 295                                 }
 296
 297                                 if(block->isGenerated() == false)
 298                                         block_is_invalid = true;
 299
 300                                 /*
 301                                         If block is not close, don't send it unless it is near
 302                                         ground level.
 303
 304                                         Block is near ground level if night-time mesh
 305                                         differs from day-time mesh.
 306                                 */
 307                                 if(d >= 4)
 308                                 {
 309                                         if(block->getDayNightDiff() == false)
 310                                                 continue;
 311                                 }
 312                         }
 313
 314                         /*
 315                                 If block has been marked to not exist on disk (dummy)
 316                                 and generating new ones is not wanted, skip block.
 317                         */
 318                         if(generate == false && surely_not_found_on_disk == true)
 319                         {
 320                                 // get next one.
 321                                 continue;
 322                         }
 323
 324                         /*
 325                                 Add inexistent block to emerge queue.
 326                         */
 327                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 328                         {
 329                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 330                                         if (nearest_emerged_d == -1)
 331                                                 nearest_emerged_d = d;
 332                                 } else {
 333                                         if (nearest_emergefull_d == -1)
 334                                                 nearest_emergefull_d = d;
 335                                         goto queue_full_break;
 336                                 }
 337
 338                                 // get next one.
 339                                 continue;
 340                         }
 341
 342                         if(nearest_sent_d == -1)
 343                                 nearest_sent_d = d;
 344
 345                         /*
 346                                 Add block to send queue
 347                         */
 348                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 349
 350                         dest.push_back(q);
 351
 352                         num_blocks_selected += 1;
 353                 }
 354         }
 355 queue_full_break:
 356
 357         // If nothing was found for sending and nothing was queued for
 358         // emerging, continue next time browsing from here
 359         if(nearest_emerged_d != -1){
 360                 new_nearest_unsent_d = nearest_emerged_d;
 361         } else if(nearest_emergefull_d != -1){
 362                 new_nearest_unsent_d = nearest_emergefull_d;
 363         } else {
 364                 if(d > g_settings->getS16("max_block_send_distance")){
 365                         new_nearest_unsent_d = 0;
 366                         m_nothing_to_send_pause_timer = 2.0;
 367                 } else {
 368                         if(nearest_sent_d != -1)
 369                                 new_nearest_unsent_d = nearest_sent_d;
 370                         else
 371                                 new_nearest_unsent_d = d;
 372                 }
 373         }
 374
 375         if(new_nearest_unsent_d != -1)
 376                 m_nearest_unsent_d = new_nearest_unsent_d;
 377 }
 378
 379 void RemoteClient::GotBlock(v3s16 p)
 380 {
 381         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 382                 m_blocks_sending.erase(p);
 383         else
 384         {
 385                 m_excess_gotblocks++;
 386         }
 387         m_blocks_sent.insert(p);
 388 }
 389
 390 void RemoteClient::SentBlock(v3s16 p)
 391 {
 392         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 393                 m_blocks_sending[p] = 0.0;
 394         else
 395                 infostream<<"RemoteClient::SentBlock(): Sent block"
 396                                 " already in m_blocks_sending"<<std::endl;
 397 }
 398
 399 void RemoteClient::SetBlockNotSent(v3s16 p)
 400 {
 401         m_nearest_unsent_d = 0;
 402
 403         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 404                 m_blocks_sending.erase(p);
 405         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 406                 m_blocks_sent.erase(p);
 407 }
 408
 409 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 410 {
 411         m_nearest_unsent_d = 0;
 412
 413         for(std::map<v3s16, MapBlock*>::iterator
 414                         i = blocks.begin();
 415                         i != blocks.end(); ++i)
 416         {
 417                 v3s16 p = i->first;
 418
 419                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 420                         m_blocks_sending.erase(p);
 421                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 422                         m_blocks_sent.erase(p);
 423         }
 424 }
 425
 426 void RemoteClient::notifyEvent(ClientStateEvent event)
 427 {
 428         std::ostringstream myerror;
 429         switch (m_state)
 430         {
 431         case CS_Invalid:
 432                 //intentionally do nothing
 433                 break;
 434         case CS_Created:
 435                 switch(event)
 436                 {
 437                 case CSE_Init:
 438                         m_state = CS_InitSent;
 439                         break;
 440                 case CSE_Disconnect:
 441                         m_state = CS_Disconnecting;
 442                         break;
 443                 case CSE_SetDenied:
 444                         m_state = CS_Denied;
 445                         break;
 446                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 447                 default:
 448                         myerror << "Created: Invalid client state transition! " << event;
 449                         throw ClientStateError(myerror.str());
 450                 }
 451                 break;
 452         case CS_Denied:
 453                 /* don't do anything if in denied state */
 454                 break;
 455         case CS_InitSent:
 456                 switch(event)
 457                 {
 458                 case CSE_GotInit2:
 459                         confirmSerializationVersion();
 460                         m_state = CS_InitDone;
 461                         break;
 462                 case CSE_Disconnect:
 463                         m_state = CS_Disconnecting;
 464                         break;
 465                 case CSE_SetDenied:
 466                         m_state = CS_Denied;
 467                         break;
 468
 469                 /* Init SetDefinitionsSent SetMediaSent */
 470                 default:
 471                         myerror << "InitSent: Invalid client state transition! " << event;
 472                         throw ClientStateError(myerror.str());
 473                 }
 474                 break;
 475
 476         case CS_InitDone:
 477                 switch(event)
 478                 {
 479                 case CSE_SetDefinitionsSent:
 480                         m_state = CS_DefinitionsSent;
 481                         break;
 482                 case CSE_Disconnect:
 483                         m_state = CS_Disconnecting;
 484                         break;
 485                 case CSE_SetDenied:
 486                         m_state = CS_Denied;
 487                         break;
 488
 489                 /* Init GotInit2 SetMediaSent */
 490                 default:
 491                         myerror << "InitDone: Invalid client state transition! " << event;
 492                         throw ClientStateError(myerror.str());
 493                 }
 494                 break;
 495         case CS_DefinitionsSent:
 496                 switch(event)
 497                 {
 498                 case CSE_SetClientReady:
 499                         m_state = CS_Active;
 500                         break;
 501                 case CSE_Disconnect:
 502                         m_state = CS_Disconnecting;
 503                         break;
 504                 case CSE_SetDenied:
 505                         m_state = CS_Denied;
 506                         break;
 507                 /* Init GotInit2 SetDefinitionsSent */
 508                 default:
 509                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 510                         throw ClientStateError(myerror.str());
 511                 }
 512                 break;
 513         case CS_Active:
 514                 switch(event)
 515                 {
 516                 case CSE_SetDenied:
 517                         m_state = CS_Denied;
 518                         break;
 519                 case CSE_Disconnect:
 520                         m_state = CS_Disconnecting;
 521                         break;
 522                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 523                 default:
 524                         myerror << "Active: Invalid client state transition! " << event;
 525                         throw ClientStateError(myerror.str());
 526                         break;
 527                 }
 528                 break;
 529         case CS_Disconnecting:
 530                 /* we are already disconnecting */
 531                 break;
 532         }
 533 }
 534
 535 u32 RemoteClient::uptime()
 536 {
 537         return getTime(PRECISION_SECONDS) - m_connection_time;
 538 }
 539
 540 ClientInterface::ClientInterface(con::Connection* con)
 541 :
 542         m_con(con),
 543         m_env(NULL),
 544         m_print_info_timer(0.0)
 545 {
 546
 547 }
 548 ClientInterface::~ClientInterface()
 549 {
 550         /*
 551                 Delete clients
 552         */
 553         {
 554                 JMutexAutoLock clientslock(m_clients_mutex);
 555
 556                 for(std::map<u16, RemoteClient*>::iterator
 557                         i = m_clients.begin();
 558                         i != m_clients.end(); ++i)
 559                 {
 560
 561                         // Delete client
 562                         delete i->second;
 563                 }
 564         }
 565 }
 566
 567 std::list<u16> ClientInterface::getClientIDs(ClientState min_state)
 568 {
 569         std::list<u16> reply;
 570         JMutexAutoLock clientslock(m_clients_mutex);
 571
 572         for(std::map<u16, RemoteClient*>::iterator
 573                 i = m_clients.begin();
 574                 i != m_clients.end(); ++i)
 575         {
 576                 if (i->second->getState() >= min_state)
 577                         reply.push_back(i->second->peer_id);
 578         }
 579
 580         return reply;
 581 }
 582
 583 std::vector<std::string> ClientInterface::getPlayerNames()
 584 {
 585         return m_clients_names;
 586 }
 587
 588
 589 void ClientInterface::step(float dtime)
 590 {
 591         m_print_info_timer += dtime;
 592         if(m_print_info_timer >= 30.0)
 593         {
 594                 m_print_info_timer = 0.0;
 595                 UpdatePlayerList();
 596         }
 597 }
 598
 599 void ClientInterface::UpdatePlayerList()
 600 {
 601         if (m_env != NULL)
 602                 {
 603                 std::list<u16> clients = getClientIDs();
 604                 m_clients_names.clear();
 605
 606
 607                 if(clients.size() != 0)
 608                         infostream<<"Players:"<<std::endl;
 609                 for(std::list<u16>::iterator
 610                         i = clients.begin();
 611                         i != clients.end(); ++i)
 612                 {
 613                         Player *player = m_env->getPlayer(*i);
 614                         if(player==NULL)
 615                                 continue;
 616                         infostream<<"* "<<player->getName()<<"\t";
 617
 618                         {
 619                                 JMutexAutoLock clientslock(m_clients_mutex);
 620                                 RemoteClient* client = lockedGetClientNoEx(*i);
 621                                 if(client != NULL)
 622                                         client->PrintInfo(infostream);
 623                         }
 624                         m_clients_names.push_back(player->getName());
 625                 }
 626         }
 627 }
 628
 629 void ClientInterface::send(u16 peer_id,u8 channelnum,
 630                 SharedBuffer<u8> data, bool reliable)
 631 {
 632         m_con->Send(peer_id, channelnum, data, reliable);
 633 }
 634
 635 void ClientInterface::sendToAll(u16 channelnum,
 636                 SharedBuffer<u8> data, bool reliable)
 637 {
 638         JMutexAutoLock clientslock(m_clients_mutex);
 639         for(std::map<u16, RemoteClient*>::iterator
 640                 i = m_clients.begin();
 641                 i != m_clients.end(); ++i)
 642         {
 643                 RemoteClient *client = i->second;
 644
 645                 if (client->net_proto_version != 0)
 646                 {
 647                         m_con->Send(client->peer_id, channelnum, data, reliable);
 648                 }
 649         }
 650 }
 651
 652 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 653 {
 654         JMutexAutoLock clientslock(m_clients_mutex);
 655         std::map<u16, RemoteClient*>::iterator n;
 656         n = m_clients.find(peer_id);
 657         // The client may not exist; clients are immediately removed if their
 658         // access is denied, and this event occurs later then.
 659         if(n == m_clients.end())
 660                 return NULL;
 661
 662         if (n->second->getState() >= state_min)
 663                 return n->second;
 664         else
 665                 return NULL;
 666 }
 667
 668 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 669 {
 670         std::map<u16, RemoteClient*>::iterator n;
 671         n = m_clients.find(peer_id);
 672         // The client may not exist; clients are immediately removed if their
 673         // access is denied, and this event occurs later then.
 674         if(n == m_clients.end())
 675                 return NULL;
 676
 677         if (n->second->getState() >= state_min)
 678                 return n->second;
 679         else
 680                 return NULL;
 681 }
 682
 683 ClientState ClientInterface::getClientState(u16 peer_id)
 684 {
 685         JMutexAutoLock clientslock(m_clients_mutex);
 686         std::map<u16, RemoteClient*>::iterator n;
 687         n = m_clients.find(peer_id);
 688         // The client may not exist; clients are immediately removed if their
 689         // access is denied, and this event occurs later then.
 690         if(n == m_clients.end())
 691                 return CS_Invalid;
 692
 693         return n->second->getState();
 694 }
 695
 696 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 697 {
 698         JMutexAutoLock clientslock(m_clients_mutex);
 699         std::map<u16, RemoteClient*>::iterator n;
 700         n = m_clients.find(peer_id);
 701         // The client may not exist; clients are immediately removed if their
 702         // access is denied, and this event occurs later then.
 703         if(n != m_clients.end())
 704                 n->second->setName(name);
 705 }
 706
 707 void ClientInterface::DeleteClient(u16 peer_id)
 708 {
 709         JMutexAutoLock conlock(m_clients_mutex);
 710
 711         // Error check
 712         std::map<u16, RemoteClient*>::iterator n;
 713         n = m_clients.find(peer_id);
 714         // The client may not exist; clients are immediately removed if their
 715         // access is denied, and this event occurs later then.
 716         if(n == m_clients.end())
 717                 return;
 718
 719         /*
 720                 Mark objects to be not known by the client
 721         */
 722         //TODO this should be done by client destructor!!!
 723         RemoteClient *client = n->second;
 724         // Handle objects
 725         for(std::set<u16>::iterator
 726                         i = client->m_known_objects.begin();
 727                         i != client->m_known_objects.end(); ++i)
 728         {
 729                 // Get object
 730                 u16 id = *i;
 731                 ServerActiveObject* obj = m_env->getActiveObject(id);
 732
 733                 if(obj && obj->m_known_by_count > 0)
 734                         obj->m_known_by_count--;
 735         }
 736
 737         // Delete client
 738         delete m_clients[peer_id];
 739         m_clients.erase(peer_id);
 740 }
 741
 742 void ClientInterface::CreateClient(u16 peer_id)
 743 {
 744         JMutexAutoLock conlock(m_clients_mutex);
 745
 746         // Error check
 747         std::map<u16, RemoteClient*>::iterator n;
 748         n = m_clients.find(peer_id);
 749         // The client shouldn't already exist
 750         if(n != m_clients.end()) return;
 751
 752         // Create client
 753         RemoteClient *client = new RemoteClient();
 754         client->peer_id = peer_id;
 755         m_clients[client->peer_id] = client;
 756 }
 757
 758 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 759 {
 760         {
 761                 JMutexAutoLock clientlock(m_clients_mutex);
 762
 763                 // Error check
 764                 std::map<u16, RemoteClient*>::iterator n;
 765                 n = m_clients.find(peer_id);
 766
 767                 // No client to deliver event
 768                 if (n == m_clients.end())
 769                         return;
 770                 n->second->notifyEvent(event);
 771         }
 772
 773         if ((event == CSE_SetClientReady) ||
 774                 (event == CSE_Disconnect)     ||
 775                 (event == CSE_SetDenied))
 776         {
 777                 UpdatePlayerList();
 778         }
 779 }
 780
 781 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 782 {
 783         JMutexAutoLock conlock(m_clients_mutex);
 784
 785         // Error check
 786         std::map<u16, RemoteClient*>::iterator n;
 787         n = m_clients.find(peer_id);
 788
 789         // No client to get version
 790         if (n == m_clients.end())
 791                 return 0;
 792
 793         return n->second->net_proto_version;
 794 }
 795
 796 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 797 {
 798         JMutexAutoLock conlock(m_clients_mutex);
 799
 800         // Error check
 801         std::map<u16, RemoteClient*>::iterator n;
 802         n = m_clients.find(peer_id);
 803
 804         // No client to set versions
 805         if (n == m_clients.end())
 806                 return;
 807
 808         n->second->setVersionInfo(major,minor,patch,full);
 809 }