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 "remoteplayer.h"
  25 #include "settings.h"
  26 #include "mapblock.h"
  27 #include "network/connection.h"
  28 #include "serverenvironment.h"
  29 #include "map.h"
  30 #include "emerge.h"
  31 #include "content_sao.h"              // TODO this is used for cleanup of only
  32 #include "log.h"
  33 #include "util/srp.h"
  34
  35 const char *ClientInterface::statenames[] = {
  36         "Invalid",
  37         "Disconnecting",
  38         "Denied",
  39         "Created",
  40         "AwaitingInit2",
  41         "HelloSent",
  42         "InitDone",
  43         "DefinitionsSent",
  44         "Active",
  45         "SudoMode",
  46 };
  47
  48
  49
  50 std::string ClientInterface::state2Name(ClientState state)
  51 {
  52         return statenames[state];
  53 }
  54
  55 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  56 {
  57         // if this block is on wire, mark it for sending again as soon as possible
  58         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  59                 SetBlockNotSent(p);
  60         }
  61 }
  62
  63 void RemoteClient::GetNextBlocks (
  64                 ServerEnvironment *env,
  65                 EmergeManager * emerge,
  66                 float dtime,
  67                 std::vector<PrioritySortedBlockTransfer> &dest)
  68 {
  69         DSTACK(FUNCTION_NAME);
  70
  71
  72         // Increment timers
  73         m_nothing_to_send_pause_timer -= dtime;
  74         m_nearest_unsent_reset_timer += dtime;
  75
  76         if(m_nothing_to_send_pause_timer >= 0)
  77                 return;
  78
  79         RemotePlayer *player = env->getPlayer(peer_id);
  80         // This can happen sometimes; clients and players are not in perfect sync.
  81         if (player == NULL)
  82                 return;
  83
  84         PlayerSAO *sao = player->getPlayerSAO();
  85         if (sao == NULL)
  86                 return;
  87
  88         // Won't send anything if already sending
  89         if(m_blocks_sending.size() >= g_settings->getU16
  90                         ("max_simultaneous_block_sends_per_client"))
  91         {
  92                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  93                 return;
  94         }
  95
  96         v3f playerpos = sao->getBasePosition();
  97         v3f playerspeed = player->getSpeed();
  98         v3f playerspeeddir(0,0,0);
  99         if(playerspeed.getLength() > 1.0*BS)
 100                 playerspeeddir = playerspeed / playerspeed.getLength();
 101         // Predict to next block
 102         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 103
 104         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 105
 106         v3s16 center = getNodeBlockPos(center_nodepos);
 107
 108         // Camera position and direction
 109         v3f camera_pos = sao->getEyePosition();
 110         v3f camera_dir = v3f(0,0,1);
 111         camera_dir.rotateYZBy(sao->getPitch());
 112         camera_dir.rotateXZBy(sao->getYaw());
 113
 114         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 115                         <<camera_dir.Z<<")"<<std::endl;*/
 116
 117         /*
 118                 Get the starting value of the block finder radius.
 119         */
 120
 121         if(m_last_center != center)
 122         {
 123                 m_nearest_unsent_d = 0;
 124                 m_last_center = center;
 125         }
 126
 127         /*infostream<<"m_nearest_unsent_reset_timer="
 128                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 129
 130         // Reset periodically to workaround for some bugs or stuff
 131         if(m_nearest_unsent_reset_timer > 20.0)
 132         {
 133                 m_nearest_unsent_reset_timer = 0;
 134                 m_nearest_unsent_d = 0;
 135                 //infostream<<"Resetting m_nearest_unsent_d for "
 136                 //              <<server->getPlayerName(peer_id)<<std::endl;
 137         }
 138
 139         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 140         s16 d_start = m_nearest_unsent_d;
 141
 142         //infostream<<"d_start="<<d_start<<std::endl;
 143
 144         u16 max_simul_sends_setting = g_settings->getU16
 145                         ("max_simultaneous_block_sends_per_client");
 146         u16 max_simul_sends_usually = max_simul_sends_setting;
 147
 148         /*
 149                 Check the time from last addNode/removeNode.
 150
 151                 Decrease send rate if player is building stuff.
 152         */
 153         m_time_from_building += dtime;
 154         if(m_time_from_building < g_settings->getFloat(
 155                                 "full_block_send_enable_min_time_from_building"))
 156         {
 157                 max_simul_sends_usually
 158                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 159         }
 160
 161         /*
 162                 Number of blocks sending + number of blocks selected for sending
 163         */
 164         u32 num_blocks_selected = m_blocks_sending.size();
 165
 166         /*
 167                 next time d will be continued from the d from which the nearest
 168                 unsent block was found this time.
 169
 170                 This is because not necessarily any of the blocks found this
 171                 time are actually sent.
 172         */
 173         s32 new_nearest_unsent_d = -1;
 174
 175         // get view range and camera fov from the client
 176         s16 wanted_range = sao->getWantedRange();
 177         float camera_fov = sao->getFov();
 178         // if FOV, wanted_range are not available (old client), fall back to old default
 179         if (wanted_range <= 0) wanted_range = 1000;
 180         if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
 181
 182         const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
 183         const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
 184         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 185         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 186
 187         s16 d_max = full_d_max;
 188         s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 189
 190         // Don't loop very much at a time
 191         s16 max_d_increment_at_time = 2;
 192         if(d_max > d_start + max_d_increment_at_time)
 193                 d_max = d_start + max_d_increment_at_time;
 194
 195         s32 nearest_emerged_d = -1;
 196         s32 nearest_emergefull_d = -1;
 197         s32 nearest_sent_d = -1;
 198         //bool queue_is_full = false;
 199
 200         s16 d;
 201         for(d = d_start; d <= d_max; d++) {
 202                 /*
 203                         Get the border/face dot coordinates of a "d-radiused"
 204                         box
 205                 */
 206                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 207
 208                 std::vector<v3s16>::iterator li;
 209                 for(li = list.begin(); li != list.end(); ++li) {
 210                         v3s16 p = *li + center;
 211
 212                         /*
 213                                 Send throttling
 214                                 - Don't allow too many simultaneous transfers
 215                                 - EXCEPT when the blocks are very close
 216
 217                                 Also, don't send blocks that are already flying.
 218                         */
 219
 220                         // Start with the usual maximum
 221                         u16 max_simul_dynamic = max_simul_sends_usually;
 222
 223                         // If block is very close, allow full maximum
 224                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 225                                 max_simul_dynamic = max_simul_sends_setting;
 226
 227                         // Don't select too many blocks for sending
 228                         if (num_blocks_selected >= max_simul_dynamic) {
 229                                 //queue_is_full = true;
 230                                 goto queue_full_break;
 231                         }
 232
 233                         // Don't send blocks that are currently being transferred
 234                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 235                                 continue;
 236
 237                         /*
 238                                 Do not go over-limit
 239                         */
 240                         if (blockpos_over_limit(p))
 241                                 continue;
 242
 243                         // If this is true, inexistent block will be made from scratch
 244                         bool generate = d <= d_max_gen;
 245
 246                         /*
 247                                 Don't generate or send if not in sight
 248                                 FIXME This only works if the client uses a small enough
 249                                 FOV setting. The default of 72 degrees is fine.
 250                         */
 251
 252                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight) == false)
 253                         {
 254                                 continue;
 255                         }
 256
 257                         /*
 258                                 Don't send already sent blocks
 259                         */
 260                         {
 261                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 262                                 {
 263                                         continue;
 264                                 }
 265                         }
 266
 267                         /*
 268                                 Check if map has this block
 269                         */
 270                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 271
 272                         bool surely_not_found_on_disk = false;
 273                         bool block_is_invalid = false;
 274                         if(block != NULL)
 275                         {
 276                                 // Reset usage timer, this block will be of use in the future.
 277                                 block->resetUsageTimer();
 278
 279                                 // Block is dummy if data doesn't exist.
 280                                 // It means it has been not found from disk and not generated
 281                                 if(block->isDummy())
 282                                 {
 283                                         surely_not_found_on_disk = true;
 284                                 }
 285
 286                                 // Block is valid if lighting is up-to-date and data exists
 287                                 if(block->isValid() == false)
 288                                 {
 289                                         block_is_invalid = true;
 290                                 }
 291
 292                                 if(block->isGenerated() == false)
 293                                         block_is_invalid = true;
 294
 295                                 /*
 296                                         If block is not close, don't send it unless it is near
 297                                         ground level.
 298
 299                                         Block is near ground level if night-time mesh
 300                                         differs from day-time mesh.
 301                                 */
 302                                 if(d >= d_opt)
 303                                 {
 304                                         if(block->getDayNightDiff() == false)
 305                                                 continue;
 306                                 }
 307                         }
 308
 309                         /*
 310                                 If block has been marked to not exist on disk (dummy)
 311                                 and generating new ones is not wanted, skip block.
 312                         */
 313                         if(generate == false && surely_not_found_on_disk == true)
 314                         {
 315                                 // get next one.
 316                                 continue;
 317                         }
 318
 319                         /*
 320                                 Add inexistent block to emerge queue.
 321                         */
 322                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 323                         {
 324                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 325                                         if (nearest_emerged_d == -1)
 326                                                 nearest_emerged_d = d;
 327                                 } else {
 328                                         if (nearest_emergefull_d == -1)
 329                                                 nearest_emergefull_d = d;
 330                                         goto queue_full_break;
 331                                 }
 332
 333                                 // get next one.
 334                                 continue;
 335                         }
 336
 337                         if(nearest_sent_d == -1)
 338                                 nearest_sent_d = d;
 339
 340                         /*
 341                                 Add block to send queue
 342                         */
 343                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 344
 345                         dest.push_back(q);
 346
 347                         num_blocks_selected += 1;
 348                 }
 349         }
 350 queue_full_break:
 351
 352         // If nothing was found for sending and nothing was queued for
 353         // emerging, continue next time browsing from here
 354         if(nearest_emerged_d != -1){
 355                 new_nearest_unsent_d = nearest_emerged_d;
 356         } else if(nearest_emergefull_d != -1){
 357                 new_nearest_unsent_d = nearest_emergefull_d;
 358         } else {
 359                 if(d > full_d_max){
 360                         new_nearest_unsent_d = 0;
 361                         m_nothing_to_send_pause_timer = 2.0;
 362                 } else {
 363                         if(nearest_sent_d != -1)
 364                                 new_nearest_unsent_d = nearest_sent_d;
 365                         else
 366                                 new_nearest_unsent_d = d;
 367                 }
 368         }
 369
 370         if(new_nearest_unsent_d != -1)
 371                 m_nearest_unsent_d = new_nearest_unsent_d;
 372 }
 373
 374 void RemoteClient::GotBlock(v3s16 p)
 375 {
 376         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 377                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 378                         m_blocks_sending.erase(p);
 379                 else
 380                         m_excess_gotblocks++;
 381
 382                 m_blocks_sent.insert(p);
 383         }
 384 }
 385
 386 void RemoteClient::SentBlock(v3s16 p)
 387 {
 388         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 389                 m_blocks_modified.erase(p);
 390
 391         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 392                 m_blocks_sending[p] = 0.0;
 393         else
 394                 infostream<<"RemoteClient::SentBlock(): Sent block"
 395                                 " already in m_blocks_sending"<<std::endl;
 396 }
 397
 398 void RemoteClient::SetBlockNotSent(v3s16 p)
 399 {
 400         m_nearest_unsent_d = 0;
 401         m_nothing_to_send_pause_timer = 0;
 402
 403         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 404                 m_blocks_sending.erase(p);
 405         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 406                 m_blocks_sent.erase(p);
 407         m_blocks_modified.insert(p);
 408 }
 409
 410 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 411 {
 412         m_nearest_unsent_d = 0;
 413         m_nothing_to_send_pause_timer = 0;
 414
 415         for(std::map<v3s16, MapBlock*>::iterator
 416                         i = blocks.begin();
 417                         i != blocks.end(); ++i)
 418         {
 419                 v3s16 p = i->first;
 420                 m_blocks_modified.insert(p);
 421
 422                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 423                         m_blocks_sending.erase(p);
 424                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 425                         m_blocks_sent.erase(p);
 426         }
 427 }
 428
 429 void RemoteClient::notifyEvent(ClientStateEvent event)
 430 {
 431         std::ostringstream myerror;
 432         switch (m_state)
 433         {
 434         case CS_Invalid:
 435                 //intentionally do nothing
 436                 break;
 437         case CS_Created:
 438                 switch (event) {
 439                 case CSE_Hello:
 440                         m_state = CS_HelloSent;
 441                         break;
 442                 case CSE_InitLegacy:
 443                         m_state = CS_AwaitingInit2;
 444                         break;
 445                 case CSE_Disconnect:
 446                         m_state = CS_Disconnecting;
 447                         break;
 448                 case CSE_SetDenied:
 449                         m_state = CS_Denied;
 450                         break;
 451                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 452                 default:
 453                         myerror << "Created: Invalid client state transition! " << event;
 454                         throw ClientStateError(myerror.str());
 455                 }
 456                 break;
 457         case CS_Denied:
 458                 /* don't do anything if in denied state */
 459                 break;
 460         case CS_HelloSent:
 461                 switch(event)
 462                 {
 463                 case CSE_AuthAccept:
 464                         m_state = CS_AwaitingInit2;
 465                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 466                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 467                                 srp_verifier_delete((SRPVerifier *) auth_data);
 468                         chosen_mech = AUTH_MECHANISM_NONE;
 469                         break;
 470                 case CSE_Disconnect:
 471                         m_state = CS_Disconnecting;
 472                         break;
 473                 case CSE_SetDenied:
 474                         m_state = CS_Denied;
 475                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 476                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 477                                 srp_verifier_delete((SRPVerifier *) auth_data);
 478                         chosen_mech = AUTH_MECHANISM_NONE;
 479                         break;
 480                 default:
 481                         myerror << "HelloSent: Invalid client state transition! " << event;
 482                         throw ClientStateError(myerror.str());
 483                 }
 484                 break;
 485         case CS_AwaitingInit2:
 486                 switch(event)
 487                 {
 488                 case CSE_GotInit2:
 489                         confirmSerializationVersion();
 490                         m_state = CS_InitDone;
 491                         break;
 492                 case CSE_Disconnect:
 493                         m_state = CS_Disconnecting;
 494                         break;
 495                 case CSE_SetDenied:
 496                         m_state = CS_Denied;
 497                         break;
 498
 499                 /* Init SetDefinitionsSent SetMediaSent */
 500                 default:
 501                         myerror << "InitSent: Invalid client state transition! " << event;
 502                         throw ClientStateError(myerror.str());
 503                 }
 504                 break;
 505
 506         case CS_InitDone:
 507                 switch(event)
 508                 {
 509                 case CSE_SetDefinitionsSent:
 510                         m_state = CS_DefinitionsSent;
 511                         break;
 512                 case CSE_Disconnect:
 513                         m_state = CS_Disconnecting;
 514                         break;
 515                 case CSE_SetDenied:
 516                         m_state = CS_Denied;
 517                         break;
 518
 519                 /* Init GotInit2 SetMediaSent */
 520                 default:
 521                         myerror << "InitDone: Invalid client state transition! " << event;
 522                         throw ClientStateError(myerror.str());
 523                 }
 524                 break;
 525         case CS_DefinitionsSent:
 526                 switch(event)
 527                 {
 528                 case CSE_SetClientReady:
 529                         m_state = CS_Active;
 530                         break;
 531                 case CSE_Disconnect:
 532                         m_state = CS_Disconnecting;
 533                         break;
 534                 case CSE_SetDenied:
 535                         m_state = CS_Denied;
 536                         break;
 537                 /* Init GotInit2 SetDefinitionsSent */
 538                 default:
 539                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 540                         throw ClientStateError(myerror.str());
 541                 }
 542                 break;
 543         case CS_Active:
 544                 switch(event)
 545                 {
 546                 case CSE_SetDenied:
 547                         m_state = CS_Denied;
 548                         break;
 549                 case CSE_Disconnect:
 550                         m_state = CS_Disconnecting;
 551                         break;
 552                 case CSE_SudoSuccess:
 553                         m_state = CS_SudoMode;
 554                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 555                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 556                                 srp_verifier_delete((SRPVerifier *) auth_data);
 557                         chosen_mech = AUTH_MECHANISM_NONE;
 558                         break;
 559                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 560                 default:
 561                         myerror << "Active: Invalid client state transition! " << event;
 562                         throw ClientStateError(myerror.str());
 563                         break;
 564                 }
 565                 break;
 566         case CS_SudoMode:
 567                 switch(event)
 568                 {
 569                 case CSE_SetDenied:
 570                         m_state = CS_Denied;
 571                         break;
 572                 case CSE_Disconnect:
 573                         m_state = CS_Disconnecting;
 574                         break;
 575                 case CSE_SudoLeave:
 576                         m_state = CS_Active;
 577                         break;
 578                 default:
 579                         myerror << "Active: Invalid client state transition! " << event;
 580                         throw ClientStateError(myerror.str());
 581                         break;
 582                 }
 583                 break;
 584         case CS_Disconnecting:
 585                 /* we are already disconnecting */
 586                 break;
 587         }
 588 }
 589
 590 u32 RemoteClient::uptime()
 591 {
 592         return getTime(PRECISION_SECONDS) - m_connection_time;
 593 }
 594
 595 ClientInterface::ClientInterface(con::Connection* con)
 596 :
 597         m_con(con),
 598         m_env(NULL),
 599         m_print_info_timer(0.0)
 600 {
 601
 602 }
 603 ClientInterface::~ClientInterface()
 604 {
 605         /*
 606                 Delete clients
 607         */
 608         {
 609                 MutexAutoLock clientslock(m_clients_mutex);
 610
 611                 for (UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 612                         i != m_clients.end(); ++i) {
 613                         // Delete client
 614                         delete i->second;
 615                 }
 616         }
 617 }
 618
 619 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 620 {
 621         std::vector<u16> reply;
 622         MutexAutoLock clientslock(m_clients_mutex);
 623
 624         for(UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 625                 i != m_clients.end(); ++i) {
 626                 if (i->second->getState() >= min_state)
 627                         reply.push_back(i->second->peer_id);
 628         }
 629
 630         return reply;
 631 }
 632
 633 void ClientInterface::step(float dtime)
 634 {
 635         m_print_info_timer += dtime;
 636         if(m_print_info_timer >= 30.0)
 637         {
 638                 m_print_info_timer = 0.0;
 639                 UpdatePlayerList();
 640         }
 641 }
 642
 643 void ClientInterface::UpdatePlayerList()
 644 {
 645         if (m_env != NULL) {
 646                 std::vector<u16> clients = getClientIDs();
 647                 m_clients_names.clear();
 648
 649
 650                 if(!clients.empty())
 651                         infostream<<"Players:"<<std::endl;
 652
 653                 for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
 654                         RemotePlayer *player = m_env->getPlayer(*i);
 655
 656                         if (player == NULL)
 657                                 continue;
 658
 659                         infostream << "* " << player->getName() << "\t";
 660
 661                         {
 662                                 MutexAutoLock clientslock(m_clients_mutex);
 663                                 RemoteClient* client = lockedGetClientNoEx(*i);
 664                                 if(client != NULL)
 665                                         client->PrintInfo(infostream);
 666                         }
 667
 668                         m_clients_names.push_back(player->getName());
 669                 }
 670         }
 671 }
 672
 673 void ClientInterface::send(u16 peer_id, u8 channelnum,
 674                 NetworkPacket* pkt, bool reliable)
 675 {
 676         m_con->Send(peer_id, channelnum, pkt, reliable);
 677 }
 678
 679 void ClientInterface::sendToAll(u16 channelnum,
 680                 NetworkPacket* pkt, bool reliable)
 681 {
 682         MutexAutoLock clientslock(m_clients_mutex);
 683         for(UNORDERED_MAP<u16, RemoteClient*>::iterator i = m_clients.begin();
 684                 i != m_clients.end(); ++i) {
 685                 RemoteClient *client = i->second;
 686
 687                 if (client->net_proto_version != 0) {
 688                         m_con->Send(client->peer_id, channelnum, pkt, reliable);
 689                 }
 690         }
 691 }
 692
 693 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 694 {
 695         MutexAutoLock clientslock(m_clients_mutex);
 696         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 697         // The client may not exist; clients are immediately removed if their
 698         // access is denied, and this event occurs later then.
 699         if (n == m_clients.end())
 700                 return NULL;
 701
 702         if (n->second->getState() >= state_min)
 703                 return n->second;
 704         else
 705                 return NULL;
 706 }
 707
 708 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 709 {
 710         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 711         // The client may not exist; clients are immediately removed if their
 712         // access is denied, and this event occurs later then.
 713         if (n == m_clients.end())
 714                 return NULL;
 715
 716         if (n->second->getState() >= state_min)
 717                 return n->second;
 718         else
 719                 return NULL;
 720 }
 721
 722 ClientState ClientInterface::getClientState(u16 peer_id)
 723 {
 724         MutexAutoLock clientslock(m_clients_mutex);
 725         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 726         // The client may not exist; clients are immediately removed if their
 727         // access is denied, and this event occurs later then.
 728         if (n == m_clients.end())
 729                 return CS_Invalid;
 730
 731         return n->second->getState();
 732 }
 733
 734 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 735 {
 736         MutexAutoLock clientslock(m_clients_mutex);
 737         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 738         // The client may not exist; clients are immediately removed if their
 739         // access is denied, and this event occurs later then.
 740         if (n != m_clients.end())
 741                 n->second->setName(name);
 742 }
 743
 744 void ClientInterface::DeleteClient(u16 peer_id)
 745 {
 746         MutexAutoLock conlock(m_clients_mutex);
 747
 748         // Error check
 749         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 750         // The client may not exist; clients are immediately removed if their
 751         // access is denied, and this event occurs later then.
 752         if (n == m_clients.end())
 753                 return;
 754
 755         /*
 756                 Mark objects to be not known by the client
 757         */
 758         //TODO this should be done by client destructor!!!
 759         RemoteClient *client = n->second;
 760         // Handle objects
 761         for(std::set<u16>::iterator
 762                         i = client->m_known_objects.begin();
 763                         i != client->m_known_objects.end(); ++i)
 764         {
 765                 // Get object
 766                 u16 id = *i;
 767                 ServerActiveObject* obj = m_env->getActiveObject(id);
 768
 769                 if(obj && obj->m_known_by_count > 0)
 770                         obj->m_known_by_count--;
 771         }
 772
 773         // Delete client
 774         delete m_clients[peer_id];
 775         m_clients.erase(peer_id);
 776 }
 777
 778 void ClientInterface::CreateClient(u16 peer_id)
 779 {
 780         MutexAutoLock conlock(m_clients_mutex);
 781
 782         // Error check
 783         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 784         // The client shouldn't already exist
 785         if (n != m_clients.end()) return;
 786
 787         // Create client
 788         RemoteClient *client = new RemoteClient();
 789         client->peer_id = peer_id;
 790         m_clients[client->peer_id] = client;
 791 }
 792
 793 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 794 {
 795         {
 796                 MutexAutoLock clientlock(m_clients_mutex);
 797
 798                 // Error check
 799                 UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 800
 801                 // No client to deliver event
 802                 if (n == m_clients.end())
 803                         return;
 804                 n->second->notifyEvent(event);
 805         }
 806
 807         if ((event == CSE_SetClientReady) ||
 808                 (event == CSE_Disconnect)     ||
 809                 (event == CSE_SetDenied))
 810         {
 811                 UpdatePlayerList();
 812         }
 813 }
 814
 815 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 816 {
 817         MutexAutoLock conlock(m_clients_mutex);
 818
 819         // Error check
 820         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 821
 822         // No client to get version
 823         if (n == m_clients.end())
 824                 return 0;
 825
 826         return n->second->net_proto_version;
 827 }
 828
 829 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 830 {
 831         MutexAutoLock conlock(m_clients_mutex);
 832
 833         // Error check
 834         UNORDERED_MAP<u16, RemoteClient*>::iterator n = m_clients.find(peer_id);
 835
 836         // No client to set versions
 837         if (n == m_clients.end())
 838                 return;
 839
 840         n->second->setVersionInfo(major,minor,patch,full);
 841 }