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         "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         Player *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         // Won't send anything if already sending
  86         if(m_blocks_sending.size() >= g_settings->getU16
  87                         ("max_simultaneous_block_sends_per_client"))
  88         {
  89                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  90                 return;
  91         }
  92
  93         v3f playerpos = player->getPosition();
  94         v3f playerspeed = player->getSpeed();
  95         v3f playerspeeddir(0,0,0);
  96         if(playerspeed.getLength() > 1.0*BS)
  97                 playerspeeddir = playerspeed / playerspeed.getLength();
  98         // Predict to next block
  99         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 100
 101         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 102
 103         v3s16 center = getNodeBlockPos(center_nodepos);
 104
 105         // Camera position and direction
 106         v3f camera_pos = player->getEyePosition();
 107         v3f camera_dir = v3f(0,0,1);
 108         camera_dir.rotateYZBy(player->getPitch());
 109         camera_dir.rotateXZBy(player->getYaw());
 110
 111         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 112                         <<camera_dir.Z<<")"<<std::endl;*/
 113
 114         /*
 115                 Get the starting value of the block finder radius.
 116         */
 117
 118         if(m_last_center != center)
 119         {
 120                 m_nearest_unsent_d = 0;
 121                 m_last_center = center;
 122         }
 123
 124         /*infostream<<"m_nearest_unsent_reset_timer="
 125                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 126
 127         // Reset periodically to workaround for some bugs or stuff
 128         if(m_nearest_unsent_reset_timer > 20.0)
 129         {
 130                 m_nearest_unsent_reset_timer = 0;
 131                 m_nearest_unsent_d = 0;
 132                 //infostream<<"Resetting m_nearest_unsent_d for "
 133                 //              <<server->getPlayerName(peer_id)<<std::endl;
 134         }
 135
 136         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 137         s16 d_start = m_nearest_unsent_d;
 138
 139         //infostream<<"d_start="<<d_start<<std::endl;
 140
 141         u16 max_simul_sends_setting = g_settings->getU16
 142                         ("max_simultaneous_block_sends_per_client");
 143         u16 max_simul_sends_usually = max_simul_sends_setting;
 144
 145         /*
 146                 Check the time from last addNode/removeNode.
 147
 148                 Decrease send rate if player is building stuff.
 149         */
 150         m_time_from_building += dtime;
 151         if(m_time_from_building < g_settings->getFloat(
 152                                 "full_block_send_enable_min_time_from_building"))
 153         {
 154                 max_simul_sends_usually
 155                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 156         }
 157
 158         /*
 159                 Number of blocks sending + number of blocks selected for sending
 160         */
 161         u32 num_blocks_selected = m_blocks_sending.size();
 162
 163         /*
 164                 next time d will be continued from the d from which the nearest
 165                 unsent block was found this time.
 166
 167                 This is because not necessarily any of the blocks found this
 168                 time are actually sent.
 169         */
 170         s32 new_nearest_unsent_d = -1;
 171
 172         const s16 full_d_max = g_settings->getS16("max_block_send_distance");
 173         s16 d_max = full_d_max;
 174         s16 d_max_gen = g_settings->getS16("max_block_generate_distance");
 175
 176         // Don't loop very much at a time
 177         s16 max_d_increment_at_time = 2;
 178         if(d_max > d_start + max_d_increment_at_time)
 179                 d_max = d_start + max_d_increment_at_time;
 180
 181         s32 nearest_emerged_d = -1;
 182         s32 nearest_emergefull_d = -1;
 183         s32 nearest_sent_d = -1;
 184         //bool queue_is_full = false;
 185
 186         s16 d;
 187         for(d = d_start; d <= d_max; d++) {
 188                 /*
 189                         Get the border/face dot coordinates of a "d-radiused"
 190                         box
 191                 */
 192                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 193
 194                 std::vector<v3s16>::iterator li;
 195                 for(li = list.begin(); li != list.end(); ++li) {
 196                         v3s16 p = *li + center;
 197
 198                         /*
 199                                 Send throttling
 200                                 - Don't allow too many simultaneous transfers
 201                                 - EXCEPT when the blocks are very close
 202
 203                                 Also, don't send blocks that are already flying.
 204                         */
 205
 206                         // Start with the usual maximum
 207                         u16 max_simul_dynamic = max_simul_sends_usually;
 208
 209                         // If block is very close, allow full maximum
 210                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 211                                 max_simul_dynamic = max_simul_sends_setting;
 212
 213                         // Don't select too many blocks for sending
 214                         if (num_blocks_selected >= max_simul_dynamic) {
 215                                 //queue_is_full = true;
 216                                 goto queue_full_break;
 217                         }
 218
 219                         // Don't send blocks that are currently being transferred
 220                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 221                                 continue;
 222
 223                         /*
 224                                 Do not go over-limit
 225                         */
 226                         if (blockpos_over_limit(p))
 227                                 continue;
 228
 229                         // If this is true, inexistent block will be made from scratch
 230                         bool generate = d <= d_max_gen;
 231
 232                         {
 233                                 /*// Limit the generating area vertically to 2/3
 234                                 if(abs(p.Y - center.Y) > d_max_gen - d_max_gen / 3)
 235                                         generate = false;*/
 236
 237                                 // Limit the send area vertically to 1/2
 238                                 if (abs(p.Y - center.Y) > full_d_max / 2)
 239                                         continue;
 240                         }
 241
 242                         /*
 243                                 Don't generate or send if not in sight
 244                                 FIXME This only works if the client uses a small enough
 245                                 FOV setting. The default of 72 degrees is fine.
 246                         */
 247
 248                         float camera_fov = (72.0*M_PI/180) * 4./3.;
 249                         if(isBlockInSight(p, camera_pos, camera_dir, camera_fov, 10000*BS) == false)
 250                         {
 251                                 continue;
 252                         }
 253
 254                         /*
 255                                 Don't send already sent blocks
 256                         */
 257                         {
 258                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 259                                 {
 260                                         continue;
 261                                 }
 262                         }
 263
 264                         /*
 265                                 Check if map has this block
 266                         */
 267                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 268
 269                         bool surely_not_found_on_disk = false;
 270                         bool block_is_invalid = false;
 271                         if(block != NULL)
 272                         {
 273                                 // Reset usage timer, this block will be of use in the future.
 274                                 block->resetUsageTimer();
 275
 276                                 // Block is dummy if data doesn't exist.
 277                                 // It means it has been not found from disk and not generated
 278                                 if(block->isDummy())
 279                                 {
 280                                         surely_not_found_on_disk = true;
 281                                 }
 282
 283                                 // Block is valid if lighting is up-to-date and data exists
 284                                 if(block->isValid() == false)
 285                                 {
 286                                         block_is_invalid = true;
 287                                 }
 288
 289                                 if(block->isGenerated() == false)
 290                                         block_is_invalid = true;
 291
 292                                 /*
 293                                         If block is not close, don't send it unless it is near
 294                                         ground level.
 295
 296                                         Block is near ground level if night-time mesh
 297                                         differs from day-time mesh.
 298                                 */
 299                                 if(d >= 4)
 300                                 {
 301                                         if(block->getDayNightDiff() == false)
 302                                                 continue;
 303                                 }
 304                         }
 305
 306                         /*
 307                                 If block has been marked to not exist on disk (dummy)
 308                                 and generating new ones is not wanted, skip block.
 309                         */
 310                         if(generate == false && surely_not_found_on_disk == true)
 311                         {
 312                                 // get next one.
 313                                 continue;
 314                         }
 315
 316                         /*
 317                                 Add inexistent block to emerge queue.
 318                         */
 319                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 320                         {
 321                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 322                                         if (nearest_emerged_d == -1)
 323                                                 nearest_emerged_d = d;
 324                                 } else {
 325                                         if (nearest_emergefull_d == -1)
 326                                                 nearest_emergefull_d = d;
 327                                         goto queue_full_break;
 328                                 }
 329
 330                                 // get next one.
 331                                 continue;
 332                         }
 333
 334                         if(nearest_sent_d == -1)
 335                                 nearest_sent_d = d;
 336
 337                         /*
 338                                 Add block to send queue
 339                         */
 340                         PrioritySortedBlockTransfer q((float)d, p, peer_id);
 341
 342                         dest.push_back(q);
 343
 344                         num_blocks_selected += 1;
 345                 }
 346         }
 347 queue_full_break:
 348
 349         // If nothing was found for sending and nothing was queued for
 350         // emerging, continue next time browsing from here
 351         if(nearest_emerged_d != -1){
 352                 new_nearest_unsent_d = nearest_emerged_d;
 353         } else if(nearest_emergefull_d != -1){
 354                 new_nearest_unsent_d = nearest_emergefull_d;
 355         } else {
 356                 if(d > g_settings->getS16("max_block_send_distance")){
 357                         new_nearest_unsent_d = 0;
 358                         m_nothing_to_send_pause_timer = 2.0;
 359                 } else {
 360                         if(nearest_sent_d != -1)
 361                                 new_nearest_unsent_d = nearest_sent_d;
 362                         else
 363                                 new_nearest_unsent_d = d;
 364                 }
 365         }
 366
 367         if(new_nearest_unsent_d != -1)
 368                 m_nearest_unsent_d = new_nearest_unsent_d;
 369 }
 370
 371 void RemoteClient::GotBlock(v3s16 p)
 372 {
 373         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 374                 m_blocks_sending.erase(p);
 375         else
 376         {
 377                 m_excess_gotblocks++;
 378         }
 379         m_blocks_sent.insert(p);
 380 }
 381
 382 void RemoteClient::SentBlock(v3s16 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 }
 401
 402 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 403 {
 404         m_nearest_unsent_d = 0;
 405         m_nothing_to_send_pause_timer = 0;
 406
 407         for(std::map<v3s16, MapBlock*>::iterator
 408                         i = blocks.begin();
 409                         i != blocks.end(); ++i)
 410         {
 411                 v3s16 p = i->first;
 412
 413                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 414                         m_blocks_sending.erase(p);
 415                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 416                         m_blocks_sent.erase(p);
 417         }
 418 }
 419
 420 void RemoteClient::notifyEvent(ClientStateEvent event)
 421 {
 422         std::ostringstream myerror;
 423         switch (m_state)
 424         {
 425         case CS_Invalid:
 426                 //intentionally do nothing
 427                 break;
 428         case CS_Created:
 429                 switch (event) {
 430                 case CSE_Hello:
 431                         m_state = CS_HelloSent;
 432                         break;
 433                 case CSE_InitLegacy:
 434                         m_state = CS_AwaitingInit2;
 435                         break;
 436                 case CSE_Disconnect:
 437                         m_state = CS_Disconnecting;
 438                         break;
 439                 case CSE_SetDenied:
 440                         m_state = CS_Denied;
 441                         break;
 442                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 443                 default:
 444                         myerror << "Created: Invalid client state transition! " << event;
 445                         throw ClientStateError(myerror.str());
 446                 }
 447                 break;
 448         case CS_Denied:
 449                 /* don't do anything if in denied state */
 450                 break;
 451         case CS_HelloSent:
 452                 switch(event)
 453                 {
 454                 case CSE_AuthAccept:
 455                         m_state = CS_AwaitingInit2;
 456                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 457                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 458                                 srp_verifier_delete((SRPVerifier *) auth_data);
 459                         chosen_mech = AUTH_MECHANISM_NONE;
 460                         break;
 461                 case CSE_Disconnect:
 462                         m_state = CS_Disconnecting;
 463                         break;
 464                 case CSE_SetDenied:
 465                         m_state = CS_Denied;
 466                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 467                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 468                                 srp_verifier_delete((SRPVerifier *) auth_data);
 469                         chosen_mech = AUTH_MECHANISM_NONE;
 470                         break;
 471                 default:
 472                         myerror << "HelloSent: Invalid client state transition! " << event;
 473                         throw ClientStateError(myerror.str());
 474                 }
 475                 break;
 476         case CS_AwaitingInit2:
 477                 switch(event)
 478                 {
 479                 case CSE_GotInit2:
 480                         confirmSerializationVersion();
 481                         m_state = CS_InitDone;
 482                         break;
 483                 case CSE_Disconnect:
 484                         m_state = CS_Disconnecting;
 485                         break;
 486                 case CSE_SetDenied:
 487                         m_state = CS_Denied;
 488                         break;
 489
 490                 /* Init SetDefinitionsSent SetMediaSent */
 491                 default:
 492                         myerror << "InitSent: Invalid client state transition! " << event;
 493                         throw ClientStateError(myerror.str());
 494                 }
 495                 break;
 496
 497         case CS_InitDone:
 498                 switch(event)
 499                 {
 500                 case CSE_SetDefinitionsSent:
 501                         m_state = CS_DefinitionsSent;
 502                         break;
 503                 case CSE_Disconnect:
 504                         m_state = CS_Disconnecting;
 505                         break;
 506                 case CSE_SetDenied:
 507                         m_state = CS_Denied;
 508                         break;
 509
 510                 /* Init GotInit2 SetMediaSent */
 511                 default:
 512                         myerror << "InitDone: Invalid client state transition! " << event;
 513                         throw ClientStateError(myerror.str());
 514                 }
 515                 break;
 516         case CS_DefinitionsSent:
 517                 switch(event)
 518                 {
 519                 case CSE_SetClientReady:
 520                         m_state = CS_Active;
 521                         break;
 522                 case CSE_Disconnect:
 523                         m_state = CS_Disconnecting;
 524                         break;
 525                 case CSE_SetDenied:
 526                         m_state = CS_Denied;
 527                         break;
 528                 /* Init GotInit2 SetDefinitionsSent */
 529                 default:
 530                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 531                         throw ClientStateError(myerror.str());
 532                 }
 533                 break;
 534         case CS_Active:
 535                 switch(event)
 536                 {
 537                 case CSE_SetDenied:
 538                         m_state = CS_Denied;
 539                         break;
 540                 case CSE_Disconnect:
 541                         m_state = CS_Disconnecting;
 542                         break;
 543                 case CSE_SudoSuccess:
 544                         m_state = CS_SudoMode;
 545                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 546                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 547                                 srp_verifier_delete((SRPVerifier *) auth_data);
 548                         chosen_mech = AUTH_MECHANISM_NONE;
 549                         break;
 550                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 551                 default:
 552                         myerror << "Active: Invalid client state transition! " << event;
 553                         throw ClientStateError(myerror.str());
 554                         break;
 555                 }
 556                 break;
 557         case CS_SudoMode:
 558                 switch(event)
 559                 {
 560                 case CSE_SetDenied:
 561                         m_state = CS_Denied;
 562                         break;
 563                 case CSE_Disconnect:
 564                         m_state = CS_Disconnecting;
 565                         break;
 566                 case CSE_SudoLeave:
 567                         m_state = CS_Active;
 568                         break;
 569                 default:
 570                         myerror << "Active: Invalid client state transition! " << event;
 571                         throw ClientStateError(myerror.str());
 572                         break;
 573                 }
 574                 break;
 575         case CS_Disconnecting:
 576                 /* we are already disconnecting */
 577                 break;
 578         }
 579 }
 580
 581 u32 RemoteClient::uptime()
 582 {
 583         return getTime(PRECISION_SECONDS) - m_connection_time;
 584 }
 585
 586 ClientInterface::ClientInterface(con::Connection* con)
 587 :
 588         m_con(con),
 589         m_env(NULL),
 590         m_print_info_timer(0.0)
 591 {
 592
 593 }
 594 ClientInterface::~ClientInterface()
 595 {
 596         /*
 597                 Delete clients
 598         */
 599         {
 600                 MutexAutoLock clientslock(m_clients_mutex);
 601
 602                 for(std::map<u16, RemoteClient*>::iterator
 603                         i = m_clients.begin();
 604                         i != m_clients.end(); ++i)
 605                 {
 606
 607                         // Delete client
 608                         delete i->second;
 609                 }
 610         }
 611 }
 612
 613 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 614 {
 615         std::vector<u16> reply;
 616         MutexAutoLock clientslock(m_clients_mutex);
 617
 618         for(std::map<u16, RemoteClient*>::iterator
 619                 i = m_clients.begin();
 620                 i != m_clients.end(); ++i)
 621         {
 622                 if (i->second->getState() >= min_state)
 623                         reply.push_back(i->second->peer_id);
 624         }
 625
 626         return reply;
 627 }
 628
 629 std::vector<std::string> ClientInterface::getPlayerNames()
 630 {
 631         return m_clients_names;
 632 }
 633
 634
 635 void ClientInterface::step(float dtime)
 636 {
 637         m_print_info_timer += dtime;
 638         if(m_print_info_timer >= 30.0)
 639         {
 640                 m_print_info_timer = 0.0;
 641                 UpdatePlayerList();
 642         }
 643 }
 644
 645 void ClientInterface::UpdatePlayerList()
 646 {
 647         if (m_env != NULL)
 648                 {
 649                 std::vector<u16> clients = getClientIDs();
 650                 m_clients_names.clear();
 651
 652
 653                 if(!clients.empty())
 654                         infostream<<"Players:"<<std::endl;
 655
 656                 for(std::vector<u16>::iterator
 657                         i = clients.begin();
 658                         i != clients.end(); ++i) {
 659                         Player *player = m_env->getPlayer(*i);
 660
 661                         if (player == NULL)
 662                                 continue;
 663
 664                         infostream << "* " << player->getName() << "\t";
 665
 666                         {
 667                                 MutexAutoLock clientslock(m_clients_mutex);
 668                                 RemoteClient* client = lockedGetClientNoEx(*i);
 669                                 if(client != NULL)
 670                                         client->PrintInfo(infostream);
 671                         }
 672
 673                         m_clients_names.push_back(player->getName());
 674                 }
 675         }
 676 }
 677
 678 void ClientInterface::send(u16 peer_id, u8 channelnum,
 679                 NetworkPacket* pkt, bool reliable)
 680 {
 681         m_con->Send(peer_id, channelnum, pkt, reliable);
 682 }
 683
 684 void ClientInterface::sendToAll(u16 channelnum,
 685                 NetworkPacket* pkt, bool reliable)
 686 {
 687         MutexAutoLock clientslock(m_clients_mutex);
 688         for(std::map<u16, RemoteClient*>::iterator
 689                 i = m_clients.begin();
 690                 i != m_clients.end(); ++i) {
 691                 RemoteClient *client = i->second;
 692
 693                 if (client->net_proto_version != 0) {
 694                         m_con->Send(client->peer_id, channelnum, pkt, reliable);
 695                 }
 696         }
 697 }
 698
 699 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 700 {
 701         MutexAutoLock clientslock(m_clients_mutex);
 702         std::map<u16, RemoteClient*>::iterator n;
 703         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 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 716 {
 717         std::map<u16, RemoteClient*>::iterator n;
 718         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 NULL;
 723
 724         if (n->second->getState() >= state_min)
 725                 return n->second;
 726         else
 727                 return NULL;
 728 }
 729
 730 ClientState ClientInterface::getClientState(u16 peer_id)
 731 {
 732         MutexAutoLock clientslock(m_clients_mutex);
 733         std::map<u16, RemoteClient*>::iterator n;
 734         n = m_clients.find(peer_id);
 735         // The client may not exist; clients are immediately removed if their
 736         // access is denied, and this event occurs later then.
 737         if(n == m_clients.end())
 738                 return CS_Invalid;
 739
 740         return n->second->getState();
 741 }
 742
 743 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 744 {
 745         MutexAutoLock clientslock(m_clients_mutex);
 746         std::map<u16, RemoteClient*>::iterator n;
 747         n = m_clients.find(peer_id);
 748         // The client may not exist; clients are immediately removed if their
 749         // access is denied, and this event occurs later then.
 750         if(n != m_clients.end())
 751                 n->second->setName(name);
 752 }
 753
 754 void ClientInterface::DeleteClient(u16 peer_id)
 755 {
 756         MutexAutoLock conlock(m_clients_mutex);
 757
 758         // Error check
 759         std::map<u16, RemoteClient*>::iterator n;
 760         n = m_clients.find(peer_id);
 761         // The client may not exist; clients are immediately removed if their
 762         // access is denied, and this event occurs later then.
 763         if(n == m_clients.end())
 764                 return;
 765
 766         /*
 767                 Mark objects to be not known by the client
 768         */
 769         //TODO this should be done by client destructor!!!
 770         RemoteClient *client = n->second;
 771         // Handle objects
 772         for(std::set<u16>::iterator
 773                         i = client->m_known_objects.begin();
 774                         i != client->m_known_objects.end(); ++i)
 775         {
 776                 // Get object
 777                 u16 id = *i;
 778                 ServerActiveObject* obj = m_env->getActiveObject(id);
 779
 780                 if(obj && obj->m_known_by_count > 0)
 781                         obj->m_known_by_count--;
 782         }
 783
 784         // Delete client
 785         delete m_clients[peer_id];
 786         m_clients.erase(peer_id);
 787 }
 788
 789 void ClientInterface::CreateClient(u16 peer_id)
 790 {
 791         MutexAutoLock conlock(m_clients_mutex);
 792
 793         // Error check
 794         std::map<u16, RemoteClient*>::iterator n;
 795         n = m_clients.find(peer_id);
 796         // The client shouldn't already exist
 797         if(n != m_clients.end()) return;
 798
 799         // Create client
 800         RemoteClient *client = new RemoteClient();
 801         client->peer_id = peer_id;
 802         m_clients[client->peer_id] = client;
 803 }
 804
 805 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 806 {
 807         {
 808                 MutexAutoLock clientlock(m_clients_mutex);
 809
 810                 // Error check
 811                 std::map<u16, RemoteClient*>::iterator n;
 812                 n = m_clients.find(peer_id);
 813
 814                 // No client to deliver event
 815                 if (n == m_clients.end())
 816                         return;
 817                 n->second->notifyEvent(event);
 818         }
 819
 820         if ((event == CSE_SetClientReady) ||
 821                 (event == CSE_Disconnect)     ||
 822                 (event == CSE_SetDenied))
 823         {
 824                 UpdatePlayerList();
 825         }
 826 }
 827
 828 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 829 {
 830         MutexAutoLock conlock(m_clients_mutex);
 831
 832         // Error check
 833         std::map<u16, RemoteClient*>::iterator n;
 834         n = m_clients.find(peer_id);
 835
 836         // No client to get version
 837         if (n == m_clients.end())
 838                 return 0;
 839
 840         return n->second->net_proto_version;
 841 }
 842
 843 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 844 {
 845         MutexAutoLock conlock(m_clients_mutex);
 846
 847         // Error check
 848         std::map<u16, RemoteClient*>::iterator n;
 849         n = m_clients.find(peer_id);
 850
 851         // No client to set versions
 852         if (n == m_clients.end())
 853                 return;
 854
 855         n->second->setVersionInfo(major,minor,patch,full);
 856 }