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 "player.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 "serverobject.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         "InitSent",
  42         "InitDone",
  43         "DefinitionsSent",
  44         "Active"
  45 };
  46
  47
  48
  49 std::string ClientInterface::state2Name(ClientState state)
  50 {
  51         return statenames[state];
  52 }
  53
  54 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  55 {
  56         // if this block is on wire, mark it for sending again as soon as possible
  57         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  58                 SetBlockNotSent(p);
  59         }
  60 }
  61
  62 void RemoteClient::GetNextBlocks (
  63                 ServerEnvironment *env,
  64                 EmergeManager * emerge,
  65                 float dtime,
  66                 std::vector<PrioritySortedBlockTransfer> &dest)
  67 {
  68         DSTACK(__FUNCTION_NAME);
  69
  70
  71         // Increment timers
  72         m_nothing_to_send_pause_timer -= dtime;
  73         m_nearest_unsent_reset_timer += dtime;
  74
  75         if(m_nothing_to_send_pause_timer >= 0)
  76                 return;
  77
  78         Player *player = env->getPlayer(peer_id);
  79         // This can happen sometimes; clients and players are not in perfect sync.
  80         if(player == NULL)
  81                 return;
  82
  83         // Won't send anything if already sending
  84         if(m_blocks_sending.size() >= g_settings->getU16
  85                         ("max_simultaneous_block_sends_per_client"))
  86         {
  87                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  88                 return;
  89         }
  90
  91         v3f playerpos = player->getPosition();
  92         v3f playerspeed = player->getSpeed();
  93         v3f playerspeeddir(0,0,0);
  94         if(playerspeed.getLength() > 1.0*BS)
  95                 playerspeeddir = playerspeed / playerspeed.getLength();
  96         // Predict to next block
  97         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
  98
  99         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 100
 101         v3s16 center = getNodeBlockPos(center_nodepos);
 102
 103         // Camera position and direction
 104         v3f camera_pos = player->getEyePosition();
 105         v3f camera_dir = v3f(0,0,1);
 106         camera_dir.rotateYZBy(player->getPitch());
 107         camera_dir.rotateXZBy(player->getYaw());
 108
 109         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 110                         <<camera_dir.Z<<")"<<std::endl;*/
 111
 112         /*
 113                 Get the starting value of the block finder radius.
 114         */
 115
 116         if(m_last_center != center)
 117         {
 118                 m_nearest_unsent_d = 0;
 119                 m_last_center = center;
 120         }
 121
 122         /*infostream<<"m_nearest_unsent_reset_timer="
 123                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 124
 125         // Reset periodically to workaround for some bugs or stuff
 126         if(m_nearest_unsent_reset_timer > 20.0)
 127         {
 128                 m_nearest_unsent_reset_timer = 0;
 129                 m_nearest_unsent_d = 0;
 130                 //infostream<<"Resetting m_nearest_unsent_d for "
 131                 //              <<server->getPlayerName(peer_id)<<std::endl;
 132         }
 133
 134         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 135         s16 d_start = m_nearest_unsent_d;
 136
 137         //infostream<<"d_start="<<d_start<<std::endl;
 138
 139         u16 max_simul_sends_setting = g_settings->getU16
 140                         ("max_simultaneous_block_sends_per_client");
 141         u16 max_simul_sends_usually = max_simul_sends_setting;
 142
 143         /*
 144                 Check the time from last addNode/removeNode.
 145
 146                 Decrease send rate if player is building stuff.
 147         */
 148         m_time_from_building += dtime;
 149         if(m_time_from_building < g_settings->getFloat(
 150                                 "full_block_send_enable_min_time_from_building"))
 151         {
 152                 max_simul_sends_usually
 153                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 154         }
 155
 156         /*
 157                 Number of blocks sending + number of blocks selected for sending
 158         */
 159         u32 num_blocks_selected = m_blocks_sending.size();
 160
 161         /*
 162                 next time d will be continued from the d from which the nearest
 163                 unsent block was found this time.
 164
 165                 This is because not necessarily any of the blocks found this
 166                 time are actually sent.
 167         */
 168         s32 new_nearest_unsent_d = -1;
 169
 170         const s16 full_d_max = g_settings->getS16("max_block_send_distance");
 171         s16 d_max = full_d_max;
 172         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 173
 174         // Don't loop very much at a time
 175         s16 max_d_increment_at_time = 2;
 176         if(d_max > d_start + max_d_increment_at_time)
 177                 d_max = d_start + max_d_increment_at_time;
 178
 179         s32 nearest_emerged_d = -1;
 180         s32 nearest_emergefull_d = -1;
 181         s32 nearest_sent_d = -1;
 182         //bool queue_is_full = false;
 183
 184         s16 d;
 185         for(d = d_start; d <= d_max; d++) {
 186                 /*
 187                         Get the border/face dot coordinates of a "d-radiused"
 188                         box
 189                 */
 190                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 191
 192                 std::vector<v3s16>::iterator li;
 193                 for(li = list.begin(); li != list.end(); ++li) {
 194                         v3s16 p = *li + center;
 195
 196                         /*
 197                                 Send throttling
 198                                 - Don't allow too many simultaneous transfers
 199                                 - EXCEPT when the blocks are very close
 200
 201                                 Also, don't send blocks that are already flying.
 202                         */
 203
 204                         // Start with the usual maximum
 205                         u16 max_simul_dynamic = max_simul_sends_usually;
 206
 207                         // If block is very close, allow full maximum
 208                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 209                                 max_simul_dynamic = max_simul_sends_setting;
 210
 211                         // Don't select too many blocks for sending
 212                         if (num_blocks_selected >= max_simul_dynamic) {
 213                                 //queue_is_full = true;
 214                                 goto queue_full_break;
 215                         }
 216
 217                         // Don't send blocks that are currently being transferred
 218                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 219                                 continue;
 220
 221                         /*
 222                                 Do not go over-limit
 223                         */
 224                         if (blockpos_over_limit(p))
 225                                 continue;
 226
 227                         // If this is true, inexistent block will be made from scratch
 228                         bool generate = d <= d_max_gen;
 229
 230                         {
 231                                 /*// Limit the generating area vertically to 2/3
 232                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 233                                         generate = false;*/
 234
 235                                 // Limit the send area vertically to 1/2
 236                                 if (abs(p.Y - center.Y) > full_d_max / 2)
 237                                         continue;
 238                         }
 239
 240                         /*
 241                                 Don't generate or send if not in sight
 242                                 FIXME This only works if the client uses a small enough
 243                                 FOV setting. The default of 72 degrees is fine.
 244                         */
 245
 246                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 247                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 248                         {
 249                                 continue;
 250                         }
 251
 252                         /*
 253                                 Don't send already sent blocks
 254                         */
 255                         {
 256                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 257                                 {
 258                                         continue;
 259                                 }
 260                         }
 261
 262                         /*
 263                                 Check if map has this block
 264                         */
 265                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 266
 267                         bool surely_not_found_on_disk = false;
 268                         bool block_is_invalid = false;
 269                         if(block != NULL)
 270                         {
 271                                 // Reset usage timer, this block will be of use in the future.
 272                                 block->resetUsageTimer();
 273
 274                                 // Block is dummy if data doesn't exist.
 275                                 // It means it has been not found from disk and not generated
 276                                 if(block->isDummy())
 277                                 {
 278                                         surely_not_found_on_disk = true;
 279                                 }
 280
 281                                 // Block is valid if lighting is up-to-date and data exists
 282                                 if(block->isValid() == false)
 283                                 {
 284                                         block_is_invalid = true;
 285                                 }
 286
 287                                 if(block->isGenerated() == false)
 288                                         block_is_invalid = true;
 289
 290                                 /*
 291                                         If block is not close, don't send it unless it is near
 292                                         ground level.
 293
 294                                         Block is near ground level if night-time mesh
 295                                         differs from day-time mesh.
 296                                 */
 297                                 if(d >= 4)
 298                                 {
 299                                         if(block->getDayNightDiff() == false)
 300                                                 continue;
 301                                 }
 302                         }
 303
 304                         /*
 305                                 If block has been marked to not exist on disk (dummy)
 306                                 and generating new ones is not wanted, skip block.
 307                         */
 308                         if(generate == false && surely_not_found_on_disk == true)
 309                         {
 310                                 // get next one.
 311                                 continue;
 312                         }
 313
 314                         /*
 315                                 Add inexistent block to emerge queue.
 316                         */
 317                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 318                         {
 319                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 320                                         if (nearest_emerged_d == -1)
 321                                                 nearest_emerged_d = d;
 322                                 } else {
 323                                         if (nearest_emergefull_d == -1)
 324                                                 nearest_emergefull_d = d;
 325                                         goto queue_full_break;
 326                                 }
 327
 328                                 // get next one.
 329                                 continue;
 330                         }
 331
 332                         if(nearest_sent_d == -1)
 333                                 nearest_sent_d = d;
 334
 335                         /*
 336                                 Add block to send queue
 337                         */
 338                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 339
 340                         dest.push_back(q);
 341
 342                         num_blocks_selected += 1;
 343                 }
 344         }
 345 queue_full_break:
 346
 347         // If nothing was found for sending and nothing was queued for
 348         // emerging, continue next time browsing from here
 349         if(nearest_emerged_d != -1){
 350                 new_nearest_unsent_d = nearest_emerged_d;
 351         } else if(nearest_emergefull_d != -1){
 352                 new_nearest_unsent_d = nearest_emergefull_d;
 353         } else {
 354                 if(d > g_settings->getS16("max_block_send_distance")){
 355                         new_nearest_unsent_d = 0;
 356                         m_nothing_to_send_pause_timer = 2.0;
 357                 } else {
 358                         if(nearest_sent_d != -1)
 359                                 new_nearest_unsent_d = nearest_sent_d;
 360                         else
 361                                 new_nearest_unsent_d = d;
 362                 }
 363         }
 364
 365         if(new_nearest_unsent_d != -1)
 366                 m_nearest_unsent_d = new_nearest_unsent_d;
 367 }
 368
 369 void RemoteClient::GotBlock(v3s16 p)
 370 {
 371         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 372                 m_blocks_sending.erase(p);
 373         else
 374         {
 375                 m_excess_gotblocks++;
 376         }
 377         m_blocks_sent.insert(p);
 378 }
 379
 380 void RemoteClient::SentBlock(v3s16 p)
 381 {
 382         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 383                 m_blocks_sending[p] = 0.0;
 384         else
 385                 infostream<<"RemoteClient::SentBlock(): Sent block"
 386                                 " already in m_blocks_sending"<<std::endl;
 387 }
 388
 389 void RemoteClient::SetBlockNotSent(v3s16 p)
 390 {
 391         m_nearest_unsent_d = 0;
 392
 393         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 394                 m_blocks_sending.erase(p);
 395         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 396                 m_blocks_sent.erase(p);
 397 }
 398
 399 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 400 {
 401         m_nearest_unsent_d = 0;
 402
 403         for(std::map<v3s16, MapBlock*>::iterator
 404                         i = blocks.begin();
 405                         i != blocks.end(); ++i)
 406         {
 407                 v3s16 p = i->first;
 408
 409                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 410                         m_blocks_sending.erase(p);
 411                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 412                         m_blocks_sent.erase(p);
 413         }
 414 }
 415
 416 void RemoteClient::notifyEvent(ClientStateEvent event)
 417 {
 418         std::ostringstream myerror;
 419         switch (m_state)
 420         {
 421         case CS_Invalid:
 422                 //intentionally do nothing
 423                 break;
 424         case CS_Created:
 425                 switch (event) {
 426                 case CSE_Hello:
 427                         m_state = CS_HelloSent;
 428                         break;
 429                 case CSE_InitLegacy:
 430                         m_state = CS_AwaitingInit2;
 431                         break;
 432                 case CSE_Disconnect:
 433                         m_state = CS_Disconnecting;
 434                         break;
 435                 case CSE_SetDenied:
 436                         m_state = CS_Denied;
 437                         break;
 438                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 439                 default:
 440                         myerror << "Created: Invalid client state transition! " << event;
 441                         throw ClientStateError(myerror.str());
 442                 }
 443                 break;
 444         case CS_Denied:
 445                 /* don't do anything if in denied state */
 446                 break;
 447         case CS_HelloSent:
 448                 switch(event)
 449                 {
 450                 case CSE_AuthAccept:
 451                         m_state = CS_AwaitingInit2;
 452                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 453                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 454                                 srp_verifier_delete((SRPVerifier *) auth_data);
 455                         chosen_mech = AUTH_MECHANISM_NONE;
 456                         break;
 457                 case CSE_Disconnect:
 458                         m_state = CS_Disconnecting;
 459                         break;
 460                 case CSE_SetDenied:
 461                         m_state = CS_Denied;
 462                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 463                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 464                                 srp_verifier_delete((SRPVerifier *) auth_data);
 465                         chosen_mech = AUTH_MECHANISM_NONE;
 466                         break;
 467                 default:
 468                         myerror << "HelloSent: Invalid client state transition! " << event;
 469                         throw ClientStateError(myerror.str());
 470                 }
 471                 break;
 472         case CS_AwaitingInit2:
 473                 switch(event)
 474                 {
 475                 case CSE_GotInit2:
 476                         confirmSerializationVersion();
 477                         m_state = CS_InitDone;
 478                         break;
 479                 case CSE_Disconnect:
 480                         m_state = CS_Disconnecting;
 481                         break;
 482                 case CSE_SetDenied:
 483                         m_state = CS_Denied;
 484                         break;
 485
 486                 /* Init SetDefinitionsSent SetMediaSent */
 487                 default:
 488                         myerror << "InitSent: Invalid client state transition! " << event;
 489                         throw ClientStateError(myerror.str());
 490                 }
 491                 break;
 492
 493         case CS_InitDone:
 494                 switch(event)
 495                 {
 496                 case CSE_SetDefinitionsSent:
 497                         m_state = CS_DefinitionsSent;
 498                         break;
 499                 case CSE_Disconnect:
 500                         m_state = CS_Disconnecting;
 501                         break;
 502                 case CSE_SetDenied:
 503                         m_state = CS_Denied;
 504                         break;
 505
 506                 /* Init GotInit2 SetMediaSent */
 507                 default:
 508                         myerror << "InitDone: Invalid client state transition! " << event;
 509                         throw ClientStateError(myerror.str());
 510                 }
 511                 break;
 512         case CS_DefinitionsSent:
 513                 switch(event)
 514                 {
 515                 case CSE_SetClientReady:
 516                         m_state = CS_Active;
 517                         break;
 518                 case CSE_Disconnect:
 519                         m_state = CS_Disconnecting;
 520                         break;
 521                 case CSE_SetDenied:
 522                         m_state = CS_Denied;
 523                         break;
 524                 /* Init GotInit2 SetDefinitionsSent */
 525                 default:
 526                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 527                         throw ClientStateError(myerror.str());
 528                 }
 529                 break;
 530         case CS_Active:
 531                 switch(event)
 532                 {
 533                 case CSE_SetDenied:
 534                         m_state = CS_Denied;
 535                         break;
 536                 case CSE_Disconnect:
 537                         m_state = CS_Disconnecting;
 538                         break;
 539                 case CSE_SudoSuccess:
 540                         m_state = CS_SudoMode;
 541                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 542                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 543                                 srp_verifier_delete((SRPVerifier *) auth_data);
 544                         chosen_mech = AUTH_MECHANISM_NONE;
 545                         break;
 546                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 547                 default:
 548                         myerror << "Active: Invalid client state transition! " << event;
 549                         throw ClientStateError(myerror.str());
 550                         break;
 551                 }
 552                 break;
 553         case CS_SudoMode:
 554                 switch(event)
 555                 {
 556                 case CSE_SetDenied:
 557                         m_state = CS_Denied;
 558                         break;
 559                 case CSE_Disconnect:
 560                         m_state = CS_Disconnecting;
 561                         break;
 562                 case CSE_SudoLeave:
 563                         m_state = CS_Active;
 564                         break;
 565                 default:
 566                         myerror << "Active: Invalid client state transition! " << event;
 567                         throw ClientStateError(myerror.str());
 568                         break;
 569                 }
 570                 break;
 571         case CS_Disconnecting:
 572                 /* we are already disconnecting */
 573                 break;
 574         }
 575 }
 576
 577 u32 RemoteClient::uptime()
 578 {
 579         return getTime(PRECISION_SECONDS) - m_connection_time;
 580 }
 581
 582 ClientInterface::ClientInterface(con::Connection* con)
 583 :
 584         m_con(con),
 585         m_env(NULL),
 586         m_print_info_timer(0.0)
 587 {
 588
 589 }
 590 ClientInterface::~ClientInterface()
 591 {
 592         /*
 593                 Delete clients
 594         */
 595         {
 596                 JMutexAutoLock clientslock(m_clients_mutex);
 597
 598                 for(std::map<u16, RemoteClient*>::iterator
 599                         i = m_clients.begin();
 600                         i != m_clients.end(); ++i)
 601                 {
 602
 603                         // Delete client
 604                         delete i->second;
 605                 }
 606         }
 607 }
 608
 609 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 610 {
 611         std::vector<u16> reply;
 612         JMutexAutoLock clientslock(m_clients_mutex);
 613
 614         for(std::map<u16, RemoteClient*>::iterator
 615                 i = m_clients.begin();
 616                 i != m_clients.end(); ++i)
 617         {
 618                 if (i->second->getState() >= min_state)
 619                         reply.push_back(i->second->peer_id);
 620         }
 621
 622         return reply;
 623 }
 624
 625 std::vector<std::string> ClientInterface::getPlayerNames()
 626 {
 627         return m_clients_names;
 628 }
 629
 630
 631 void ClientInterface::step(float dtime)
 632 {
 633         m_print_info_timer += dtime;
 634         if(m_print_info_timer >= 30.0)
 635         {
 636                 m_print_info_timer = 0.0;
 637                 UpdatePlayerList();
 638         }
 639 }
 640
 641 void ClientInterface::UpdatePlayerList()
 642 {
 643         if (m_env != NULL)
 644                 {
 645                 std::vector<u16> clients = getClientIDs();
 646                 m_clients_names.clear();
 647
 648
 649                 if(!clients.empty())
 650                         infostream<<"Players:"<<std::endl;
 651
 652                 for(std::vector<u16>::iterator
 653                         i = clients.begin();
 654                         i != clients.end(); ++i) {
 655                         Player *player = m_env->getPlayer(*i);
 656
 657                         if (player == NULL)
 658                                 continue;
 659
 660                         infostream << "* " << player->getName() << "\t";
 661
 662                         {
 663                                 JMutexAutoLock clientslock(m_clients_mutex);
 664                                 RemoteClient* client = lockedGetClientNoEx(*i);
 665                                 if(client != NULL)
 666                                         client->PrintInfo(infostream);
 667                         }
 668
 669                         m_clients_names.push_back(player->getName());
 670                 }
 671         }
 672 }
 673
 674 void ClientInterface::send(u16 peer_id, u8 channelnum,
 675                 NetworkPacket* pkt, bool reliable)
 676 {
 677         m_con->Send(peer_id, channelnum, pkt, reliable);
 678 }
 679
 680 void ClientInterface::sendToAll(u16 channelnum,
 681                 NetworkPacket* pkt, bool reliable)
 682 {
 683         JMutexAutoLock clientslock(m_clients_mutex);
 684         for(std::map<u16, RemoteClient*>::iterator
 685                 i = m_clients.begin();
 686                 i != m_clients.end(); ++i) {
 687                 RemoteClient *client = i->second;
 688
 689                 if (client->net_proto_version != 0) {
 690                         m_con->Send(client->peer_id, channelnum, pkt, reliable);
 691                 }
 692         }
 693 }
 694
 695 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 696 {
 697         JMutexAutoLock clientslock(m_clients_mutex);
 698         std::map<u16, RemoteClient*>::iterator n;
 699         n = m_clients.find(peer_id);
 700         // The client may not exist; clients are immediately removed if their
 701         // access is denied, and this event occurs later then.
 702         if(n == m_clients.end())
 703                 return NULL;
 704
 705         if (n->second->getState() >= state_min)
 706                 return n->second;
 707         else
 708                 return NULL;
 709 }
 710
 711 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 712 {
 713         std::map<u16, RemoteClient*>::iterator n;
 714         n = m_clients.find(peer_id);
 715         // The client may not exist; clients are immediately removed if their
 716         // access is denied, and this event occurs later then.
 717         if(n == m_clients.end())
 718                 return NULL;
 719
 720         if (n->second->getState() >= state_min)
 721                 return n->second;
 722         else
 723                 return NULL;
 724 }
 725
 726 ClientState ClientInterface::getClientState(u16 peer_id)
 727 {
 728         JMutexAutoLock clientslock(m_clients_mutex);
 729         std::map<u16, RemoteClient*>::iterator n;
 730         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                 return CS_Invalid;
 735
 736         return n->second->getState();
 737 }
 738
 739 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 740 {
 741         JMutexAutoLock clientslock(m_clients_mutex);
 742         std::map<u16, RemoteClient*>::iterator n;
 743         n = m_clients.find(peer_id);
 744         // The client may not exist; clients are immediately removed if their
 745         // access is denied, and this event occurs later then.
 746         if(n != m_clients.end())
 747                 n->second->setName(name);
 748 }
 749
 750 void ClientInterface::DeleteClient(u16 peer_id)
 751 {
 752         JMutexAutoLock conlock(m_clients_mutex);
 753
 754         // Error check
 755         std::map<u16, RemoteClient*>::iterator n;
 756         n = m_clients.find(peer_id);
 757         // The client may not exist; clients are immediately removed if their
 758         // access is denied, and this event occurs later then.
 759         if(n == m_clients.end())
 760                 return;
 761
 762         /*
 763                 Mark objects to be not known by the client
 764         */
 765         //TODO this should be done by client destructor!!!
 766         RemoteClient *client = n->second;
 767         // Handle objects
 768         for(std::set<u16>::iterator
 769                         i = client->m_known_objects.begin();
 770                         i != client->m_known_objects.end(); ++i)
 771         {
 772                 // Get object
 773                 u16 id = *i;
 774                 ServerActiveObject* obj = m_env->getActiveObject(id);
 775
 776                 if(obj && obj->m_known_by_count > 0)
 777                         obj->m_known_by_count--;
 778         }
 779
 780         // Delete client
 781         delete m_clients[peer_id];
 782         m_clients.erase(peer_id);
 783 }
 784
 785 void ClientInterface::CreateClient(u16 peer_id)
 786 {
 787         JMutexAutoLock conlock(m_clients_mutex);
 788
 789         // Error check
 790         std::map<u16, RemoteClient*>::iterator n;
 791         n = m_clients.find(peer_id);
 792         // The client shouldn't already exist
 793         if(n != m_clients.end()) return;
 794
 795         // Create client
 796         RemoteClient *client = new RemoteClient();
 797         client->peer_id = peer_id;
 798         m_clients[client->peer_id] = client;
 799 }
 800
 801 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 802 {
 803         {
 804                 JMutexAutoLock clientlock(m_clients_mutex);
 805
 806                 // Error check
 807                 std::map<u16, RemoteClient*>::iterator n;
 808                 n = m_clients.find(peer_id);
 809
 810                 // No client to deliver event
 811                 if (n == m_clients.end())
 812                         return;
 813                 n->second->notifyEvent(event);
 814         }
 815
 816         if ((event == CSE_SetClientReady) ||
 817                 (event == CSE_Disconnect)     ||
 818                 (event == CSE_SetDenied))
 819         {
 820                 UpdatePlayerList();
 821         }
 822 }
 823
 824 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 825 {
 826         JMutexAutoLock conlock(m_clients_mutex);
 827
 828         // Error check
 829         std::map<u16, RemoteClient*>::iterator n;
 830         n = m_clients.find(peer_id);
 831
 832         // No client to get version
 833         if (n == m_clients.end())
 834                 return 0;
 835
 836         return n->second->net_proto_version;
 837 }
 838
 839 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 840 {
 841         JMutexAutoLock conlock(m_clients_mutex);
 842
 843         // Error check
 844         std::map<u16, RemoteClient*>::iterator n;
 845         n = m_clients.find(peer_id);
 846
 847         // No client to set versions
 848         if (n == m_clients.end())
 849                 return;
 850
 851         n->second->setVersionInfo(major,minor,patch,full);
 852 }