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