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 #include "clientiface.h"
  22 #include "network/connection.h"
  23 #include "network/serveropcodes.h"
  24 #include "remoteplayer.h"
  25 #include "settings.h"
  26 #include "mapblock.h"
  27 #include "serverenvironment.h"
  28 #include "map.h"
  29 #include "emerge.h"
  30 #include "server/luaentity_sao.h"
  31 #include "server/player_sao.h"
  32 #include "log.h"
  33 #include "util/srp.h"
  34 #include "face_position_cache.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 RemoteClient::RemoteClient() :
  57         m_max_simul_sends(g_settings->getU16("max_simultaneous_block_sends_per_client")),
  58         m_min_time_from_building(
  59                 g_settings->getFloat("full_block_send_enable_min_time_from_building")),
  60         m_max_send_distance(g_settings->getS16("max_block_send_distance")),
  61         m_block_optimize_distance(g_settings->getS16("block_send_optimize_distance")),
  62         m_max_gen_distance(g_settings->getS16("max_block_generate_distance")),
  63         m_occ_cull(g_settings->getBool("server_side_occlusion_culling"))
  64 {
  65 }
  66
  67 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  68 {
  69         // if this block is on wire, mark it for sending again as soon as possible
  70         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  71                 SetBlockNotSent(p);
  72         }
  73 }
  74
  75 LuaEntitySAO *getAttachedObject(PlayerSAO *sao, ServerEnvironment *env)
  76 {
  77         if (!sao->isAttached())
  78                 return nullptr;
  79
  80         int id;
  81         std::string bone;
  82         v3f dummy;
  83         bool force_visible;
  84         sao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
  85         ServerActiveObject *ao = env->getActiveObject(id);
  86         while (id && ao) {
  87                 ao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
  88                 if (id)
  89                         ao = env->getActiveObject(id);
  90         }
  91         return dynamic_cast<LuaEntitySAO *>(ao);
  92 }
  93
  94 void RemoteClient::GetNextBlocks (
  95                 ServerEnvironment *env,
  96                 EmergeManager * emerge,
  97                 float dtime,
  98                 std::vector<PrioritySortedBlockTransfer> &dest)
  99 {
 100         // Increment timers
 101         m_nothing_to_send_pause_timer -= dtime;
 102
 103         if (m_nothing_to_send_pause_timer >= 0)
 104                 return;
 105
 106         RemotePlayer *player = env->getPlayer(peer_id);
 107         // This can happen sometimes; clients and players are not in perfect sync.
 108         if (!player)
 109                 return;
 110
 111         PlayerSAO *sao = player->getPlayerSAO();
 112         if (!sao)
 113                 return;
 114
 115         // Won't send anything if already sending
 116         if (m_blocks_sending.size() >= m_max_simul_sends) {
 117                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 118                 return;
 119         }
 120
 121         v3f playerpos = sao->getBasePosition();
 122         // if the player is attached, get the velocity from the attached object
 123         LuaEntitySAO *lsao = getAttachedObject(sao, env);
 124         const v3f &playerspeed = lsao? lsao->getVelocity() : player->getSpeed();
 125         v3f playerspeeddir(0,0,0);
 126         if (playerspeed.getLength() > 1.0f * BS)
 127                 playerspeeddir = playerspeed / playerspeed.getLength();
 128         // Predict to next block
 129         v3f playerpos_predicted = playerpos + playerspeeddir * (MAP_BLOCKSIZE * BS);
 130
 131         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 132
 133         v3s16 center = getNodeBlockPos(center_nodepos);
 134
 135         // Camera position and direction
 136         v3f camera_pos = sao->getEyePosition();
 137         v3f camera_dir = v3f(0,0,1);
 138         camera_dir.rotateYZBy(sao->getLookPitch());
 139         camera_dir.rotateXZBy(sao->getRotation().Y);
 140
 141         u16 max_simul_sends_usually = m_max_simul_sends;
 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 < m_min_time_from_building) {
 150                 max_simul_sends_usually
 151                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 152         }
 153
 154         /*
 155                 Number of blocks sending + number of blocks selected for sending
 156         */
 157         u32 num_blocks_selected = m_blocks_sending.size();
 158
 159         /*
 160                 next time d will be continued from the d from which the nearest
 161                 unsent block was found this time.
 162
 163                 This is because not necessarily any of the blocks found this
 164                 time are actually sent.
 165         */
 166         s32 new_nearest_unsent_d = -1;
 167
 168         // Get view range and camera fov (radians) from the client
 169         s16 wanted_range = sao->getWantedRange() + 1;
 170         float camera_fov = sao->getFov();
 171
 172         /*
 173                 Get the starting value of the block finder radius.
 174         */
 175         if (m_last_center != center) {
 176                 m_nearest_unsent_d = 0;
 177                 m_last_center = center;
 178         }
 179         // reset the unsent distance if the view angle has changed more that 10% of the fov
 180         // (this matches isBlockInSight which allows for an extra 10%)
 181         if (camera_dir.dotProduct(m_last_camera_dir) < std::cos(camera_fov * 0.1f)) {
 182                 m_nearest_unsent_d = 0;
 183                 m_last_camera_dir = camera_dir;
 184         }
 185         if (m_nearest_unsent_d > 0) {
 186                 // make sure any blocks modified since the last time we sent blocks are resent
 187                 for (const v3s16 &p : m_blocks_modified) {
 188                         m_nearest_unsent_d = std::min(m_nearest_unsent_d, center.getDistanceFrom(p));
 189                 }
 190         }
 191         m_blocks_modified.clear();
 192
 193         s16 d_start = m_nearest_unsent_d;
 194
 195         // Distrust client-sent FOV and get server-set player object property
 196         // zoom FOV (degrees) as a check to avoid hacked clients using FOV to load
 197         // distant world.
 198         // (zoom is disabled by value 0)
 199         float prop_zoom_fov = sao->getZoomFOV() < 0.001f ?
 200                 0.0f :
 201                 std::max(camera_fov, sao->getZoomFOV() * core::DEGTORAD);
 202
 203         const s16 full_d_max = std::min(adjustDist(m_max_send_distance, prop_zoom_fov),
 204                 wanted_range);
 205         const s16 d_opt = std::min(adjustDist(m_block_optimize_distance, prop_zoom_fov),
 206                 wanted_range);
 207         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 208
 209         s16 d_max_gen = std::min(adjustDist(m_max_gen_distance, prop_zoom_fov),
 210                 wanted_range);
 211
 212         s16 d_max = full_d_max;
 213
 214         // Don't loop very much at a time
 215         s16 max_d_increment_at_time = 2;
 216         if (d_max > d_start + max_d_increment_at_time)
 217                 d_max = d_start + max_d_increment_at_time;
 218
 219         // cos(angle between velocity and camera) * |velocity|
 220         // Limit to 0.0f in case player moves backwards.
 221         f32 dot = rangelim(camera_dir.dotProduct(playerspeed), 0.0f, 300.0f);
 222
 223         // Reduce the field of view when a player moves and looks forward.
 224         // limit max fov effect to 50%, 60% at 20n/s fly speed
 225         camera_fov = camera_fov / (1 + dot / 300.0f);
 226
 227         s32 nearest_emerged_d = -1;
 228         s32 nearest_emergefull_d = -1;
 229         s32 nearest_sent_d = -1;
 230         //bool queue_is_full = false;
 231
 232         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 233
 234         s16 d;
 235         for (d = d_start; d <= d_max; d++) {
 236                 /*
 237                         Get the border/face dot coordinates of a "d-radiused"
 238                         box
 239                 */
 240                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 241
 242                 std::vector<v3s16>::iterator li;
 243                 for (li = list.begin(); li != list.end(); ++li) {
 244                         v3s16 p = *li + center;
 245
 246                         /*
 247                                 Send throttling
 248                                 - Don't allow too many simultaneous transfers
 249                                 - EXCEPT when the blocks are very close
 250
 251                                 Also, don't send blocks that are already flying.
 252                         */
 253
 254                         // Start with the usual maximum
 255                         u16 max_simul_dynamic = max_simul_sends_usually;
 256
 257                         // If block is very close, allow full maximum
 258                         if (d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 259                                 max_simul_dynamic = m_max_simul_sends;
 260
 261                         // Don't select too many blocks for sending
 262                         if (num_blocks_selected >= max_simul_dynamic) {
 263                                 //queue_is_full = true;
 264                                 goto queue_full_break;
 265                         }
 266
 267                         // Don't send blocks that are currently being transferred
 268                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 269                                 continue;
 270
 271                         /*
 272                                 Do not go over max mapgen limit
 273                         */
 274                         if (blockpos_over_max_limit(p))
 275                                 continue;
 276
 277                         // If this is true, inexistent block will be made from scratch
 278                         bool generate = d <= d_max_gen;
 279
 280                         /*
 281                                 Don't generate or send if not in sight
 282                                 FIXME This only works if the client uses a small enough
 283                                 FOV setting. The default of 72 degrees is fine.
 284                                 Also retrieve a smaller view cone in the direction of the player's
 285                                 movement.
 286                                 (0.1 is about 4 degrees)
 287                         */
 288                         f32 dist;
 289                         if (!(isBlockInSight(p, camera_pos, camera_dir, camera_fov,
 290                                                 d_blocks_in_sight, &dist) ||
 291                                         (playerspeed.getLength() > 1.0f * BS &&
 292                                         isBlockInSight(p, camera_pos, playerspeeddir, 0.1f,
 293                                                 d_blocks_in_sight)))) {
 294                                 continue;
 295                         }
 296
 297                         /*
 298                                 Check if map has this block
 299                         */
 300                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 301                         if (block) {
 302                                 // First: Reset usage timer, this block will be of use in the future.
 303                                 block->resetUsageTimer();
 304                         }
 305
 306                         /*
 307                                 Don't send already sent blocks
 308                         */
 309                         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 310                                 continue;
 311
 312                         bool block_not_found = false;
 313                         if (block) {
 314                                 // Check whether the block exists (with data)
 315                                 if (!block->isGenerated())
 316                                         block_not_found = true;
 317
 318                                 /*
 319                                         If block is not close, don't send it unless it is near
 320                                         ground level.
 321
 322                                         Block is near ground level if night-time mesh
 323                                         differs from day-time mesh.
 324                                 */
 325                                 if (d >= d_opt) {
 326                                         if (!block->getIsUnderground() && !block->getDayNightDiff())
 327                                                 continue;
 328                                 }
 329
 330                                 if (m_occ_cull && !block_not_found &&
 331                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 332                                         continue;
 333                                 }
 334                         }
 335
 336                         /*
 337                                 If block has been marked to not exist on disk (dummy) or is
 338                                 not generated and generating new ones is not wanted, skip block.
 339                         */
 340                         if (!generate && block_not_found) {
 341                                 // get next one.
 342                                 continue;
 343                         }
 344
 345                         /*
 346                                 Add inexistent block to emerge queue.
 347                         */
 348                         if (block == NULL || block_not_found) {
 349                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 350                                         if (nearest_emerged_d == -1)
 351                                                 nearest_emerged_d = d;
 352                                 } else {
 353                                         if (nearest_emergefull_d == -1)
 354                                                 nearest_emergefull_d = d;
 355                                         goto queue_full_break;
 356                                 }
 357
 358                                 // get next one.
 359                                 continue;
 360                         }
 361
 362                         if (nearest_sent_d == -1)
 363                                 nearest_sent_d = d;
 364
 365                         /*
 366                                 Add block to send queue
 367                         */
 368                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 369
 370                         dest.push_back(q);
 371
 372                         num_blocks_selected += 1;
 373                 }
 374         }
 375 queue_full_break:
 376
 377         // If nothing was found for sending and nothing was queued for
 378         // emerging, continue next time browsing from here
 379         if (nearest_emerged_d != -1) {
 380                 new_nearest_unsent_d = nearest_emerged_d;
 381         } else if (nearest_emergefull_d != -1) {
 382                 new_nearest_unsent_d = nearest_emergefull_d;
 383         } else {
 384                 if (d > full_d_max) {
 385                         new_nearest_unsent_d = 0;
 386                         m_nothing_to_send_pause_timer = 2.0f;
 387                 } else {
 388                         if (nearest_sent_d != -1)
 389                                 new_nearest_unsent_d = nearest_sent_d;
 390                         else
 391                                 new_nearest_unsent_d = d;
 392                 }
 393         }
 394
 395         if (new_nearest_unsent_d != -1)
 396                 m_nearest_unsent_d = new_nearest_unsent_d;
 397 }
 398
 399 void RemoteClient::GotBlock(v3s16 p)
 400 {
 401         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
 402                 m_blocks_sending.erase(p);
 403                 // only add to sent blocks if it actually was sending
 404                 // (it might have been modified since)
 405                 m_blocks_sent.insert(p);
 406         } else {
 407                 m_excess_gotblocks++;
 408         }
 409 }
 410
 411 void RemoteClient::SentBlock(v3s16 p)
 412 {
 413         if (m_blocks_sending.find(p) == m_blocks_sending.end())
 414                 m_blocks_sending[p] = 0.0f;
 415         else
 416                 infostream<<"RemoteClient::SentBlock(): Sent block"
 417                                 " already in m_blocks_sending"<<std::endl;
 418 }
 419
 420 void RemoteClient::SetBlockNotSent(v3s16 p)
 421 {
 422         m_nothing_to_send_pause_timer = 0;
 423
 424         // remove the block from sending and sent sets,
 425         // and mark as modified if found
 426         if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
 427                 m_blocks_modified.insert(p);
 428 }
 429
 430 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 431 {
 432         m_nothing_to_send_pause_timer = 0;
 433
 434         for (auto &block : blocks) {
 435                 v3s16 p = block.first;
 436                 // remove the block from sending and sent sets,
 437                 // and mark as modified if found
 438                 if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
 439                         m_blocks_modified.insert(p);
 440         }
 441 }
 442
 443 void RemoteClient::notifyEvent(ClientStateEvent event)
 444 {
 445         std::ostringstream myerror;
 446         switch (m_state)
 447         {
 448         case CS_Invalid:
 449                 //intentionally do nothing
 450                 break;
 451         case CS_Created:
 452                 switch (event) {
 453                 case CSE_Hello:
 454                         m_state = CS_HelloSent;
 455                         break;
 456                 case CSE_Disconnect:
 457                         m_state = CS_Disconnecting;
 458                         break;
 459                 case CSE_SetDenied:
 460                         m_state = CS_Denied;
 461                         break;
 462                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 463                 default:
 464                         myerror << "Created: Invalid client state transition! " << event;
 465                         throw ClientStateError(myerror.str());
 466                 }
 467                 break;
 468         case CS_Denied:
 469                 /* don't do anything if in denied state */
 470                 break;
 471         case CS_HelloSent:
 472                 switch(event)
 473                 {
 474                 case CSE_AuthAccept:
 475                         m_state = CS_AwaitingInit2;
 476                         resetChosenMech();
 477                         break;
 478                 case CSE_Disconnect:
 479                         m_state = CS_Disconnecting;
 480                         break;
 481                 case CSE_SetDenied:
 482                         m_state = CS_Denied;
 483                         resetChosenMech();
 484                         break;
 485                 default:
 486                         myerror << "HelloSent: Invalid client state transition! " << event;
 487                         throw ClientStateError(myerror.str());
 488                 }
 489                 break;
 490         case CS_AwaitingInit2:
 491                 switch(event)
 492                 {
 493                 case CSE_GotInit2:
 494                         confirmSerializationVersion();
 495                         m_state = CS_InitDone;
 496                         break;
 497                 case CSE_Disconnect:
 498                         m_state = CS_Disconnecting;
 499                         break;
 500                 case CSE_SetDenied:
 501                         m_state = CS_Denied;
 502                         break;
 503
 504                 /* Init SetDefinitionsSent SetMediaSent */
 505                 default:
 506                         myerror << "InitSent: Invalid client state transition! " << event;
 507                         throw ClientStateError(myerror.str());
 508                 }
 509                 break;
 510
 511         case CS_InitDone:
 512                 switch(event)
 513                 {
 514                 case CSE_SetDefinitionsSent:
 515                         m_state = CS_DefinitionsSent;
 516                         break;
 517                 case CSE_Disconnect:
 518                         m_state = CS_Disconnecting;
 519                         break;
 520                 case CSE_SetDenied:
 521                         m_state = CS_Denied;
 522                         break;
 523
 524                 /* Init GotInit2 SetMediaSent */
 525                 default:
 526                         myerror << "InitDone: Invalid client state transition! " << event;
 527                         throw ClientStateError(myerror.str());
 528                 }
 529                 break;
 530         case CS_DefinitionsSent:
 531                 switch(event)
 532                 {
 533                 case CSE_SetClientReady:
 534                         m_state = CS_Active;
 535                         break;
 536                 case CSE_Disconnect:
 537                         m_state = CS_Disconnecting;
 538                         break;
 539                 case CSE_SetDenied:
 540                         m_state = CS_Denied;
 541                         break;
 542                 /* Init GotInit2 SetDefinitionsSent */
 543                 default:
 544                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 545                         throw ClientStateError(myerror.str());
 546                 }
 547                 break;
 548         case CS_Active:
 549                 switch(event)
 550                 {
 551                 case CSE_SetDenied:
 552                         m_state = CS_Denied;
 553                         break;
 554                 case CSE_Disconnect:
 555                         m_state = CS_Disconnecting;
 556                         break;
 557                 case CSE_SudoSuccess:
 558                         m_state = CS_SudoMode;
 559                         resetChosenMech();
 560                         break;
 561                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 562                 default:
 563                         myerror << "Active: Invalid client state transition! " << event;
 564                         throw ClientStateError(myerror.str());
 565                         break;
 566                 }
 567                 break;
 568         case CS_SudoMode:
 569                 switch(event)
 570                 {
 571                 case CSE_SetDenied:
 572                         m_state = CS_Denied;
 573                         break;
 574                 case CSE_Disconnect:
 575                         m_state = CS_Disconnecting;
 576                         break;
 577                 case CSE_SudoLeave:
 578                         m_state = CS_Active;
 579                         break;
 580                 default:
 581                         myerror << "Active: Invalid client state transition! " << event;
 582                         throw ClientStateError(myerror.str());
 583                         break;
 584                 }
 585                 break;
 586         case CS_Disconnecting:
 587                 /* we are already disconnecting */
 588                 break;
 589         }
 590 }
 591
 592 void RemoteClient::resetChosenMech()
 593 {
 594         if (auth_data) {
 595                 srp_verifier_delete((SRPVerifier *) auth_data);
 596                 auth_data = nullptr;
 597         }
 598         chosen_mech = AUTH_MECHANISM_NONE;
 599 }
 600
 601 u64 RemoteClient::uptime() const
 602 {
 603         return porting::getTimeS() - m_connection_time;
 604 }
 605
 606 ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
 607 :
 608         m_con(con),
 609         m_env(NULL),
 610         m_print_info_timer(0.0f)
 611 {
 612
 613 }
 614 ClientInterface::~ClientInterface()
 615 {
 616         /*
 617                 Delete clients
 618         */
 619         {
 620                 RecursiveMutexAutoLock clientslock(m_clients_mutex);
 621
 622                 for (auto &client_it : m_clients) {
 623                         // Delete client
 624                         delete client_it.second;
 625                 }
 626         }
 627 }
 628
 629 std::vector<session_t> ClientInterface::getClientIDs(ClientState min_state)
 630 {
 631         std::vector<session_t> reply;
 632         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 633
 634         for (const auto &m_client : m_clients) {
 635                 if (m_client.second->getState() >= min_state)
 636                         reply.push_back(m_client.second->peer_id);
 637         }
 638
 639         return reply;
 640 }
 641
 642 void ClientInterface::markBlockposAsNotSent(const v3s16 &pos)
 643 {
 644         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 645         for (const auto &client : m_clients) {
 646                 if (client.second->getState() >= CS_Active)
 647                         client.second->SetBlockNotSent(pos);
 648         }
 649 }
 650
 651 /**
 652  * Verify if user limit was reached.
 653  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 654  * @return true if user limit was reached
 655  */
 656 bool ClientInterface::isUserLimitReached()
 657 {
 658         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 659 }
 660
 661 void ClientInterface::step(float dtime)
 662 {
 663         m_print_info_timer += dtime;
 664         if (m_print_info_timer >= 30.0f) {
 665                 m_print_info_timer = 0.0f;
 666                 UpdatePlayerList();
 667         }
 668 }
 669
 670 void ClientInterface::UpdatePlayerList()
 671 {
 672         if (m_env) {
 673                 std::vector<session_t> clients = getClientIDs();
 674                 m_clients_names.clear();
 675
 676                 if (!clients.empty())
 677                         infostream<<"Players:"<<std::endl;
 678
 679                 for (session_t i : clients) {
 680                         RemotePlayer *player = m_env->getPlayer(i);
 681
 682                         if (player == NULL)
 683                                 continue;
 684
 685                         infostream << "* " << player->getName() << "\t";
 686
 687                         {
 688                                 RecursiveMutexAutoLock clientslock(m_clients_mutex);
 689                                 RemoteClient* client = lockedGetClientNoEx(i);
 690                                 if (client)
 691                                         client->PrintInfo(infostream);
 692                         }
 693
 694                         m_clients_names.emplace_back(player->getName());
 695                 }
 696         }
 697 }
 698
 699 void ClientInterface::send(session_t peer_id, u8 channelnum,
 700                 NetworkPacket *pkt, bool reliable)
 701 {
 702         m_con->Send(peer_id, channelnum, pkt, reliable);
 703 }
 704
 705 void ClientInterface::sendToAll(NetworkPacket *pkt)
 706 {
 707         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 708         for (auto &client_it : m_clients) {
 709                 RemoteClient *client = client_it.second;
 710
 711                 if (client->net_proto_version != 0) {
 712                         m_con->Send(client->peer_id,
 713                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 714                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 715                 }
 716         }
 717 }
 718
 719 RemoteClient* ClientInterface::getClientNoEx(session_t peer_id, ClientState state_min)
 720 {
 721         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 722         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 723         // The client may not exist; clients are immediately removed if their
 724         // access is denied, and this event occurs later then.
 725         if (n == m_clients.end())
 726                 return NULL;
 727
 728         if (n->second->getState() >= state_min)
 729                 return n->second;
 730
 731         return NULL;
 732 }
 733
 734 RemoteClient* ClientInterface::lockedGetClientNoEx(session_t peer_id, ClientState state_min)
 735 {
 736         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 737         // The client may not exist; clients are immediately removed if their
 738         // access is denied, and this event occurs later then.
 739         if (n == m_clients.end())
 740                 return NULL;
 741
 742         if (n->second->getState() >= state_min)
 743                 return n->second;
 744
 745         return NULL;
 746 }
 747
 748 ClientState ClientInterface::getClientState(session_t peer_id)
 749 {
 750         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 751         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 752         // The client may not exist; clients are immediately removed if their
 753         // access is denied, and this event occurs later then.
 754         if (n == m_clients.end())
 755                 return CS_Invalid;
 756
 757         return n->second->getState();
 758 }
 759
 760 void ClientInterface::setPlayerName(session_t peer_id, const std::string &name)
 761 {
 762         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 763         RemoteClientMap::iterator n = m_clients.find(peer_id);
 764         // The client may not exist; clients are immediately removed if their
 765         // access is denied, and this event occurs later then.
 766         if (n != m_clients.end())
 767                 n->second->setName(name);
 768 }
 769
 770 void ClientInterface::DeleteClient(session_t peer_id)
 771 {
 772         RecursiveMutexAutoLock conlock(m_clients_mutex);
 773
 774         // Error check
 775         RemoteClientMap::iterator n = m_clients.find(peer_id);
 776         // The client may not exist; clients are immediately removed if their
 777         // access is denied, and this event occurs later then.
 778         if (n == m_clients.end())
 779                 return;
 780
 781         /*
 782                 Mark objects to be not known by the client
 783         */
 784         //TODO this should be done by client destructor!!!
 785         RemoteClient *client = n->second;
 786         // Handle objects
 787         for (u16 id : client->m_known_objects) {
 788                 // Get object
 789                 ServerActiveObject* obj = m_env->getActiveObject(id);
 790
 791                 if(obj && obj->m_known_by_count > 0)
 792                         obj->m_known_by_count--;
 793         }
 794
 795         // Delete client
 796         delete m_clients[peer_id];
 797         m_clients.erase(peer_id);
 798 }
 799
 800 void ClientInterface::CreateClient(session_t peer_id)
 801 {
 802         RecursiveMutexAutoLock conlock(m_clients_mutex);
 803
 804         // Error check
 805         RemoteClientMap::iterator n = m_clients.find(peer_id);
 806         // The client shouldn't already exist
 807         if (n != m_clients.end()) return;
 808
 809         // Create client
 810         RemoteClient *client = new RemoteClient();
 811         client->peer_id = peer_id;
 812         m_clients[client->peer_id] = client;
 813 }
 814
 815 void ClientInterface::event(session_t peer_id, ClientStateEvent event)
 816 {
 817         {
 818                 RecursiveMutexAutoLock clientlock(m_clients_mutex);
 819
 820                 // Error check
 821                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 822
 823                 // No client to deliver event
 824                 if (n == m_clients.end())
 825                         return;
 826                 n->second->notifyEvent(event);
 827         }
 828
 829         if ((event == CSE_SetClientReady) ||
 830                 (event == CSE_Disconnect)     ||
 831                 (event == CSE_SetDenied))
 832         {
 833                 UpdatePlayerList();
 834         }
 835 }
 836
 837 u16 ClientInterface::getProtocolVersion(session_t peer_id)
 838 {
 839         RecursiveMutexAutoLock conlock(m_clients_mutex);
 840
 841         // Error check
 842         RemoteClientMap::iterator n = m_clients.find(peer_id);
 843
 844         // No client to get version
 845         if (n == m_clients.end())
 846                 return 0;
 847
 848         return n->second->net_proto_version;
 849 }
 850
 851 void ClientInterface::setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
 852                 const std::string &full)
 853 {
 854         RecursiveMutexAutoLock conlock(m_clients_mutex);
 855
 856         // Error check
 857         RemoteClientMap::iterator n = m_clients.find(peer_id);
 858
 859         // No client to set versions
 860         if (n == m_clients.end())
 861                 return;
 862
 863         n->second->setVersionInfo(major, minor, patch, full);
 864 }