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 "util/numeric.h"
  24 #include "util/mathconstants.h"
  25 #include "remoteplayer.h"
  26 #include "settings.h"
  27 #include "mapblock.h"
  28 #include "network/connection.h"
  29 #include "environment.h"
  30 #include "map.h"
  31 #include "emerge.h"
  32 #include "content_sao.h"              // TODO this is used for cleanup of only
  33 #include "log.h"
  34 #include "util/srp.h"
  35
  36 const char *ClientInterface::statenames[] = {
  37         "Invalid",
  38         "Disconnecting",
  39         "Denied",
  40         "Created",
  41         "AwaitingInit2",
  42         "HelloSent",
  43         "InitDone",
  44         "DefinitionsSent",
  45         "Active",
  46         "SudoMode",
  47 };
  48
  49
  50
  51 std::string ClientInterface::state2Name(ClientState state)
  52 {
  53         return statenames[state];
  54 }
  55
  56 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  57 {
  58         // if this block is on wire, mark it for sending again as soon as possible
  59         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  60                 SetBlockNotSent(p);
  61         }
  62 }
  63
  64 void RemoteClient::GetNextBlocks (
  65                 ServerEnvironment *env,
  66                 EmergeManager * emerge,
  67                 float dtime,
  68                 std::vector<PrioritySortedBlockTransfer> &dest)
  69 {
  70         DSTACK(FUNCTION_NAME);
  71
  72
  73         // Increment timers
  74         m_nothing_to_send_pause_timer -= dtime;
  75         m_nearest_unsent_reset_timer += dtime;
  76
  77         if(m_nothing_to_send_pause_timer >= 0)
  78                 return;
  79
  80         RemotePlayer *player = env->getPlayer(peer_id);
  81         // This can happen sometimes; clients and players are not in perfect sync.
  82         if (player == NULL)
  83                 return;
  84
  85         PlayerSAO *sao = player->getPlayerSAO();
  86         if (sao == NULL)
  87                 return;
  88
  89         // Won't send anything if already sending
  90         if(m_blocks_sending.size() >= g_settings->getU16
  91                         ("max_simultaneous_block_sends_per_client"))
  92         {
  93                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  94                 return;
  95         }
  96
  97         v3f playerpos = sao->getBasePosition();
  98         v3f playerspeed = player->getSpeed();
  99         v3f playerspeeddir(0,0,0);
 100         if(playerspeed.getLength() > 1.0*BS)
 101                 playerspeeddir = playerspeed / playerspeed.getLength();
 102         // Predict to next block
 103         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 104
 105         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 106
 107         v3s16 center = getNodeBlockPos(center_nodepos);
 108
 109         // Camera position and direction
 110         v3f camera_pos = sao->getEyePosition();
 111         v3f camera_dir = v3f(0,0,1);
 112         camera_dir.rotateYZBy(sao->getPitch());
 113         camera_dir.rotateXZBy(sao->getYaw());
 114
 115         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 116                         <<camera_dir.Z<<")"<<std::endl;*/
 117
 118         /*
 119                 Get the starting value of the block finder radius.
 120         */
 121
 122         if(m_last_center != center)
 123         {
 124                 m_nearest_unsent_d = 0;
 125                 m_last_center = center;
 126         }
 127
 128         /*infostream<<"m_nearest_unsent_reset_timer="
 129                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 130
 131         // Reset periodically to workaround for some bugs or stuff
 132         if(m_nearest_unsent_reset_timer > 20.0)
 133         {
 134                 m_nearest_unsent_reset_timer = 0;
 135                 m_nearest_unsent_d = 0;
 136                 //infostream<<"Resetting m_nearest_unsent_d for "
 137                 //              <<server->getPlayerName(peer_id)<<std::endl;
 138         }
 139
 140         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 141         s16 d_start = m_nearest_unsent_d;
 142
 143         //infostream<<"d_start="<<d_start<<std::endl;
 144
 145         u16 max_simul_sends_setting = g_settings->getU16
 146                         ("max_simultaneous_block_sends_per_client");
 147         u16 max_simul_sends_usually = max_simul_sends_setting;
 148
 149         /*
 150                 Check the time from last addNode/removeNode.
 151
 152                 Decrease send rate if player is building stuff.
 153         */
 154         m_time_from_building += dtime;
 155         if(m_time_from_building < g_settings->getFloat(
 156                                 "full_block_send_enable_min_time_from_building"))
 157         {
 158                 max_simul_sends_usually
 159                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 160         }
 161
 162         /*
 163                 Number of blocks sending + number of blocks selected for sending
 164         */
 165         u32 num_blocks_selected = m_blocks_sending.size();
 166
 167         /*
 168                 next time d will be continued from the d from which the nearest
 169                 unsent block was found this time.
 170
 171                 This is because not necessarily any of the blocks found this
 172                 time are actually sent.
 173         */
 174         s32 new_nearest_unsent_d = -1;
 175
 176         const s16 full_d_max = g_settings->getS16("max_block_send_distance");
 177         const s16 d_opt = g_settings->getS16("block_send_optimize_distance");
 178
 179         s16 d_max = full_d_max;
 180         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 181
 182         // Don't loop very much at a time
 183         s16 max_d_increment_at_time = 2;
 184         if(d_max > d_start + max_d_increment_at_time)
 185                 d_max = d_start + max_d_increment_at_time;
 186
 187         s32 nearest_emerged_d = -1;
 188         s32 nearest_emergefull_d = -1;
 189         s32 nearest_sent_d = -1;
 190         //bool queue_is_full = false;
 191
 192         s16 d;
 193         for(d = d_start; d <= d_max; d++) {
 194                 /*
 195                         Get the border/face dot coordinates of a "d-radiused"
 196                         box
 197                 */
 198                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 199
 200                 std::vector<v3s16>::iterator li;
 201                 for(li = list.begin(); li != list.end(); ++li) {
 202                         v3s16 p = *li + center;
 203
 204                         /*
 205                                 Send throttling
 206                                 - Don't allow too many simultaneous transfers
 207                                 - EXCEPT when the blocks are very close
 208
 209                                 Also, don't send blocks that are already flying.
 210                         */
 211
 212                         // Start with the usual maximum
 213                         u16 max_simul_dynamic = max_simul_sends_usually;
 214
 215                         // If block is very close, allow full maximum
 216                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 217                                 max_simul_dynamic = max_simul_sends_setting;
 218
 219                         // Don't select too many blocks for sending
 220                         if (num_blocks_selected >= max_simul_dynamic) {
 221                                 //queue_is_full = true;
 222                                 goto queue_full_break;
 223                         }
 224
 225                         // Don't send blocks that are currently being transferred
 226                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 227                                 continue;
 228
 229                         /*
 230                                 Do not go over-limit
 231                         */
 232                         if (blockpos_over_limit(p))
 233                                 continue;
 234
 235                         // If this is true, inexistent block will be made from scratch
 236                         bool generate = d <= d_max_gen;
 237
 238                         /*
 239                                 Don't generate or send if not in sight
 240                                 FIXME This only works if the client uses a small enough
 241                                 FOV setting. The default of 72 degrees is fine.
 242                         */
 243
 244                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 245                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 246                         {
 247                                 continue;
 248                         }
 249
 250                         /*
 251                                 Don't send already sent blocks
 252                         */
 253                         {
 254                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 255                                 {
 256                                         continue;
 257                                 }
 258                         }
 259
 260                         /*
 261                                 Check if map has this block
 262                         */
 263                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 264
 265                         bool surely_not_found_on_disk = false;
 266                         bool block_is_invalid = false;
 267                         if(block != NULL)
 268                         {
 269                                 // Reset usage timer, this block will be of use in the future.
 270                                 block->resetUsageTimer();
 271
 272                                 // Block is dummy if data doesn't exist.
 273                                 // It means it has been not found from disk and not generated
 274                                 if(block->isDummy())
 275                                 {
 276                                         surely_not_found_on_disk = true;
 277                                 }
 278
 279                                 // Block is valid if lighting is up-to-date and data exists
 280                                 if(block->isValid() == false)
 281                                 {
 282                                         block_is_invalid = true;
 283                                 }
 284
 285                                 if(block->isGenerated() == false)
 286                                         block_is_invalid = true;
 287
 288                                 /*
 289                                         If block is not close, don't send it unless it is near
 290                                         ground level.
 291
 292                                         Block is near ground level if night-time mesh
 293                                         differs from day-time mesh.
 294                                 */
 295                                 if(d >= d_opt)
 296                                 {
 297                                         if(block->getDayNightDiff() == false)
 298                                                 continue;
 299                                 }
 300                         }
 301
 302                         /*
 303                                 If block has been marked to not exist on disk (dummy)
 304                                 and generating new ones is not wanted, skip block.
 305                         */
 306                         if(generate == false && surely_not_found_on_disk == true)
 307                         {
 308                                 // get next one.
 309                                 continue;
 310                         }
 311
 312                         /*
 313                                 Add inexistent block to emerge queue.
 314                         */
 315                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 316                         {
 317                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 318                                         if (nearest_emerged_d == -1)
 319                                                 nearest_emerged_d = d;
 320                                 } else {
 321                                         if (nearest_emergefull_d == -1)
 322                                                 nearest_emergefull_d = d;
 323                                         goto queue_full_break;
 324                                 }
 325
 326                                 // get next one.
 327                                 continue;
 328                         }
 329
 330                         if(nearest_sent_d == -1)
 331                                 nearest_sent_d = d;
 332
 333                         /*
 334                                 Add block to send queue
 335                         */
 336                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 337
 338                         dest.push_back(q);
 339
 340                         num_blocks_selected += 1;
 341                 }
 342         }
 343 queue_full_break:
 344
 345         // If nothing was found for sending and nothing was queued for
 346         // emerging, continue next time browsing from here
 347         if(nearest_emerged_d != -1){
 348                 new_nearest_unsent_d = nearest_emerged_d;
 349         } else if(nearest_emergefull_d != -1){
 350                 new_nearest_unsent_d = nearest_emergefull_d;
 351         } else {
 352                 if(d > g_settings->getS16("max_block_send_distance")){
 353                         new_nearest_unsent_d = 0;
 354                         m_nothing_to_send_pause_timer = 2.0;
 355                 } else {
 356                         if(nearest_sent_d != -1)
 357                                 new_nearest_unsent_d = nearest_sent_d;
 358                         else
 359                                 new_nearest_unsent_d = d;
 360                 }
 361         }
 362
 363         if(new_nearest_unsent_d != -1)
 364                 m_nearest_unsent_d = new_nearest_unsent_d;
 365 }
 366
 367 void RemoteClient::GotBlock(v3s16 p)
 368 {
 369         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 370                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 371                         m_blocks_sending.erase(p);
 372                 else
 373                         m_excess_gotblocks++;
 374
 375                 m_blocks_sent.insert(p);
 376         }
 377 }
 378
 379 void RemoteClient::SentBlock(v3s16 p)
 380 {
 381         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 382                 m_blocks_modified.erase(p);
 383
 384         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 385                 m_blocks_sending[p] = 0.0;
 386         else
 387                 infostream<<"RemoteClient::SentBlock(): Sent block"
 388                                 " already in m_blocks_sending"<<std::endl;
 389 }
 390
 391 void RemoteClient::SetBlockNotSent(v3s16 p)
 392 {
 393         m_nearest_unsent_d = 0;
 394         m_nothing_to_send_pause_timer = 0;
 395
 396         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 397                 m_blocks_sending.erase(p);
 398         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 399                 m_blocks_sent.erase(p);
 400         m_blocks_modified.insert(p);
 401 }
 402
 403 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 404 {
 405         m_nearest_unsent_d = 0;
 406         m_nothing_to_send_pause_timer = 0;
 407
 408         for(std::map<v3s16, MapBlock*>::iterator
 409                         i = blocks.begin();
 410                         i != blocks.end(); ++i)
 411         {
 412                 v3s16 p = i->first;
 413                 m_blocks_modified.insert(p);
 414
 415                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 416                         m_blocks_sending.erase(p);
 417                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 418                         m_blocks_sent.erase(p);
 419         }
 420 }
 421
 422 void RemoteClient::notifyEvent(ClientStateEvent event)
 423 {
 424         std::ostringstream myerror;
 425         switch (m_state)
 426         {
 427         case CS_Invalid:
 428                 //intentionally do nothing
 429                 break;
 430         case CS_Created:
 431                 switch (event) {
 432                 case CSE_Hello:
 433                         m_state = CS_HelloSent;
 434                         break;
 435                 case CSE_InitLegacy:
 436                         m_state = CS_AwaitingInit2;
 437                         break;
 438                 case CSE_Disconnect:
 439                         m_state = CS_Disconnecting;
 440                         break;
 441                 case CSE_SetDenied:
 442                         m_state = CS_Denied;
 443                         break;
 444                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 445                 default:
 446                         myerror << "Created: Invalid client state transition! " << event;
 447                         throw ClientStateError(myerror.str());
 448                 }
 449                 break;
 450         case CS_Denied:
 451                 /* don't do anything if in denied state */
 452                 break;
 453         case CS_HelloSent:
 454                 switch(event)
 455                 {
 456                 case CSE_AuthAccept:
 457                         m_state = CS_AwaitingInit2;
 458                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 459                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 460                                 srp_verifier_delete((SRPVerifier *) auth_data);
 461                         chosen_mech = AUTH_MECHANISM_NONE;
 462                         break;
 463                 case CSE_Disconnect:
 464                         m_state = CS_Disconnecting;
 465                         break;
 466                 case CSE_SetDenied:
 467                         m_state = CS_Denied;
 468                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 469                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 470                                 srp_verifier_delete((SRPVerifier *) auth_data);
 471                         chosen_mech = AUTH_MECHANISM_NONE;
 472                         break;
 473                 default:
 474                         myerror << "HelloSent: Invalid client state transition! " << event;
 475                         throw ClientStateError(myerror.str());
 476                 }
 477                 break;
 478         case CS_AwaitingInit2:
 479                 switch(event)
 480                 {
 481                 case CSE_GotInit2:
 482                         confirmSerializationVersion();
 483                         m_state = CS_InitDone;
 484                         break;
 485                 case CSE_Disconnect:
 486                         m_state = CS_Disconnecting;
 487                         break;
 488                 case CSE_SetDenied:
 489                         m_state = CS_Denied;
 490                         break;
 491
 492                 /* Init SetDefinitionsSent SetMediaSent */
 493                 default:
 494                         myerror << "InitSent: Invalid client state transition! " << event;
 495                         throw ClientStateError(myerror.str());
 496                 }
 497                 break;
 498
 499         case CS_InitDone:
 500                 switch(event)
 501                 {
 502                 case CSE_SetDefinitionsSent:
 503                         m_state = CS_DefinitionsSent;
 504                         break;
 505                 case CSE_Disconnect:
 506                         m_state = CS_Disconnecting;
 507                         break;
 508                 case CSE_SetDenied:
 509                         m_state = CS_Denied;
 510                         break;
 511
 512                 /* Init GotInit2 SetMediaSent */
 513                 default:
 514                         myerror << "InitDone: Invalid client state transition! " << event;
 515                         throw ClientStateError(myerror.str());
 516                 }
 517                 break;
 518         case CS_DefinitionsSent:
 519                 switch(event)
 520                 {
 521                 case CSE_SetClientReady:
 522                         m_state = CS_Active;
 523                         break;
 524                 case CSE_Disconnect:
 525                         m_state = CS_Disconnecting;
 526                         break;
 527                 case CSE_SetDenied:
 528                         m_state = CS_Denied;
 529                         break;
 530                 /* Init GotInit2 SetDefinitionsSent */
 531                 default:
 532                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 533                         throw ClientStateError(myerror.str());
 534                 }
 535                 break;
 536         case CS_Active:
 537                 switch(event)
 538                 {
 539                 case CSE_SetDenied:
 540                         m_state = CS_Denied;
 541                         break;
 542                 case CSE_Disconnect:
 543                         m_state = CS_Disconnecting;
 544                         break;
 545                 case CSE_SudoSuccess:
 546                         m_state = CS_SudoMode;
 547                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 548                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 549                                 srp_verifier_delete((SRPVerifier *) auth_data);
 550                         chosen_mech = AUTH_MECHANISM_NONE;
 551                         break;
 552                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 553                 default:
 554                         myerror << "Active: Invalid client state transition! " << event;
 555                         throw ClientStateError(myerror.str());
 556                         break;
 557                 }
 558                 break;
 559         case CS_SudoMode:
 560                 switch(event)
 561                 {
 562                 case CSE_SetDenied:
 563                         m_state = CS_Denied;
 564                         break;
 565                 case CSE_Disconnect:
 566                         m_state = CS_Disconnecting;
 567                         break;
 568                 case CSE_SudoLeave:
 569                         m_state = CS_Active;
 570                         break;
 571                 default:
 572                         myerror << "Active: Invalid client state transition! " << event;
 573                         throw ClientStateError(myerror.str());
 574                         break;
 575                 }
 576                 break;
 577         case CS_Disconnecting:
 578                 /* we are already disconnecting */
 579                 break;
 580         }
 581 }
 582
 583 u32 RemoteClient::uptime()
 584 {
 585         return getTime(PRECISION_SECONDS) - m_connection_time;
 586 }
 587
 588 ClientInterface::ClientInterface(con::Connection* con)
 589 :
 590         m_con(con),
 591         m_env(NULL),
 592         m_print_info_timer(0.0)
 593 {
 594
 595 }
 596 ClientInterface::~ClientInterface()
 597 {
 598         /*
 599                 Delete clients
 600         */
 601         {
 602                 MutexAutoLock clientslock(m_clients_mutex);
 603
 604                 for (UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 605                         i != m_clients.end(); ++i) {
 606                         // Delete client
 607                         delete i->second;
 608                 }
 609         }
 610 }
 611
 612 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 613 {
 614         std::vector<u16> reply;
 615         MutexAutoLock clientslock(m_clients_mutex);
 616
 617         for(UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 618                 i != m_clients.end(); ++i) {
 619                 if (i->second->getState() >= min_state)
 620                         reply.push_back(i->second->peer_id);
 621         }
 622
 623         return reply;
 624 }
 625
 626 void ClientInterface::step(float dtime)
 627 {
 628         m_print_info_timer += dtime;
 629         if(m_print_info_timer >= 30.0)
 630         {
 631                 m_print_info_timer = 0.0;
 632                 UpdatePlayerList();
 633         }
 634 }
 635
 636 void ClientInterface::UpdatePlayerList()
 637 {
 638         if (m_env != NULL) {
 639                 std::vector<u16> clients = getClientIDs();
 640                 m_clients_names.clear();
 641
 642
 643                 if(!clients.empty())
 644                         infostream<<"Players:"<<std::endl;
 645
 646                 for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
 647                         RemotePlayer *player = m_env->getPlayer(*i);
 648
 649                         if (player == NULL)
 650                                 continue;
 651
 652                         infostream << "* " << player->getName() << "\t";
 653
 654                         {
 655                                 MutexAutoLock clientslock(m_clients_mutex);
 656                                 RemoteClient* client = lockedGetClientNoEx(*i);
 657                                 if(client != NULL)
 658                                         client->PrintInfo(infostream);
 659                         }
 660
 661                         m_clients_names.push_back(player->getName());
 662                 }
 663         }
 664 }
 665
 666 void ClientInterface::send(u16 peer_id, u8 channelnum,
 667                 NetworkPacket* pkt, bool reliable)
 668 {
 669         m_con->Send(peer_id, channelnum, pkt, reliable);
 670 }
 671
 672 void ClientInterface::sendToAll(u16 channelnum,
 673                 NetworkPacket* pkt, bool reliable)
 674 {
 675         MutexAutoLock clientslock(m_clients_mutex);
 676         for(UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 677                 i != m_clients.end(); ++i) {
 678                 RemoteClient *client = i->second;
 679
 680                 if (client->net_proto_version != 0) {
 681                         m_con->Send(client->peer_id, channelnum, pkt, reliable);
 682                 }
 683         }
 684 }
 685
 686 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 687 {
 688         MutexAutoLock clientslock(m_clients_mutex);
 689         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 690         // The client may not exist; clients are immediately removed if their
 691         // access is denied, and this event occurs later then.
 692         if (n == m_clients.end())
 693                 return NULL;
 694
 695         if (n->second->getState() >= state_min)
 696                 return n->second;
 697         else
 698                 return NULL;
 699 }
 700
 701 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 702 {
 703         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 704         // The client may not exist; clients are immediately removed if their
 705         // access is denied, and this event occurs later then.
 706         if (n == m_clients.end())
 707                 return NULL;
 708
 709         if (n->second->getState() >= state_min)
 710                 return n->second;
 711         else
 712                 return NULL;
 713 }
 714
 715 ClientState ClientInterface::getClientState(u16 peer_id)
 716 {
 717         MutexAutoLock clientslock(m_clients_mutex);
 718         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 719         // The client may not exist; clients are immediately removed if their
 720         // access is denied, and this event occurs later then.
 721         if (n == m_clients.end())
 722                 return CS_Invalid;
 723
 724         return n->second->getState();
 725 }
 726
 727 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 728 {
 729         MutexAutoLock clientslock(m_clients_mutex);
 730         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 731         // The client may not exist; clients are immediately removed if their
 732         // access is denied, and this event occurs later then.
 733         if (n != m_clients.end())
 734                 n->second->setName(name);
 735 }
 736
 737 void ClientInterface::DeleteClient(u16 peer_id)
 738 {
 739         MutexAutoLock conlock(m_clients_mutex);
 740
 741         // Error check
 742         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 743         // The client may not exist; clients are immediately removed if their
 744         // access is denied, and this event occurs later then.
 745         if (n == m_clients.end())
 746                 return;
 747
 748         /*
 749                 Mark objects to be not known by the client
 750         */
 751         //TODO this should be done by client destructor!!!
 752         RemoteClient *client = n->second;
 753         // Handle objects
 754         for(std::set<u16>::iterator
 755                         i = client->m_known_objects.begin();
 756                         i != client->m_known_objects.end(); ++i)
 757         {
 758                 // Get object
 759                 u16 id = *i;
 760                 ServerActiveObject* obj = m_env->getActiveObject(id);
 761
 762                 if(obj && obj->m_known_by_count > 0)
 763                         obj->m_known_by_count--;
 764         }
 765
 766         // Delete client
 767         delete m_clients[peer_id];
 768         m_clients.erase(peer_id);
 769 }
 770
 771 void ClientInterface::CreateClient(u16 peer_id)
 772 {
 773         MutexAutoLock conlock(m_clients_mutex);
 774
 775         // Error check
 776         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 777         // The client shouldn't already exist
 778         if (n != m_clients.end()) return;
 779
 780         // Create client
 781         RemoteClient *client = new RemoteClient();
 782         client->peer_id = peer_id;
 783         m_clients[client->peer_id] = client;
 784 }
 785
 786 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 787 {
 788         {
 789                 MutexAutoLock clientlock(m_clients_mutex);
 790
 791                 // Error check
 792                 UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 793
 794                 // No client to deliver event
 795                 if (n == m_clients.end())
 796                         return;
 797                 n->second->notifyEvent(event);
 798         }
 799
 800         if ((event == CSE_SetClientReady) ||
 801                 (event == CSE_Disconnect)     ||
 802                 (event == CSE_SetDenied))
 803         {
 804                 UpdatePlayerList();
 805         }
 806 }
 807
 808 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 809 {
 810         MutexAutoLock conlock(m_clients_mutex);
 811
 812         // Error check
 813         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 814
 815         // No client to get version
 816         if (n == m_clients.end())
 817                 return 0;
 818
 819         return n->second->net_proto_version;
 820 }
 821
 822 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 823 {
 824         MutexAutoLock conlock(m_clients_mutex);
 825
 826         // Error check
 827         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 828
 829         // No client to set versions
 830         if (n == m_clients.end())
 831                 return;
 832
 833         n->second->setVersionInfo(major,minor,patch,full);
 834 }