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