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 "content_sao.h"              // TODO this is used for cleanup of only
  31 #include "log.h"
  32 #include "util/srp.h"
  33 #include "face_position_cache.h"
  34
  35 const char *ClientInterface::statenames[] = {
  36         "Invalid",
  37         "Disconnecting",
  38         "Denied",
  39         "Created",
  40         "AwaitingInit2",
  41         "HelloSent",
  42         "InitDone",
  43         "DefinitionsSent",
  44         "Active",
  45         "SudoMode",
  46 };
  47
  48
  49
  50 std::string ClientInterface::state2Name(ClientState state)
  51 {
  52         return statenames[state];
  53 }
  54
  55 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  56 {
  57         // if this block is on wire, mark it for sending again as soon as possible
  58         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  59                 SetBlockNotSent(p);
  60         }
  61 }
  62
  63 void RemoteClient::GetNextBlocks (
  64                 ServerEnvironment *env,
  65                 EmergeManager * emerge,
  66                 float dtime,
  67                 std::vector<PrioritySortedBlockTransfer> &dest)
  68 {
  69         // Increment timers
  70         m_nothing_to_send_pause_timer -= dtime;
  71         m_nearest_unsent_reset_timer += dtime;
  72
  73         if(m_nothing_to_send_pause_timer >= 0)
  74                 return;
  75
  76         RemotePlayer *player = env->getPlayer(peer_id);
  77         // This can happen sometimes; clients and players are not in perfect sync.
  78         if (!player)
  79                 return;
  80
  81         PlayerSAO *sao = player->getPlayerSAO();
  82         if (!sao)
  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 = sao->getBasePosition();
  94         const 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 = sao->getEyePosition();
 107         v3f camera_dir = v3f(0,0,1);
 108         camera_dir.rotateYZBy(sao->getPitch());
 109         camera_dir.rotateXZBy(sao->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         // get view range and camera fov from the client
 173         s16 wanted_range = sao->getWantedRange();
 174         float camera_fov = sao->getFov();
 175         // if FOV, wanted_range are not available (old client), fall back to old default
 176         if (wanted_range <= 0) wanted_range = 1000;
 177         if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
 178
 179         const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
 180         const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
 181         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 182         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 183
 184         s16 d_max = full_d_max;
 185         s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 186
 187         // Don't loop very much at a time
 188         s16 max_d_increment_at_time = 2;
 189         if(d_max > d_start + max_d_increment_at_time)
 190                 d_max = d_start + max_d_increment_at_time;
 191
 192         s32 nearest_emerged_d = -1;
 193         s32 nearest_emergefull_d = -1;
 194         s32 nearest_sent_d = -1;
 195         //bool queue_is_full = false;
 196
 197         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 198         const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
 199
 200         s16 d;
 201         for(d = d_start; d <= d_max; d++) {
 202                 /*
 203                         Get the border/face dot coordinates of a "d-radiused"
 204                         box
 205                 */
 206                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 207
 208                 std::vector<v3s16>::iterator li;
 209                 for(li = list.begin(); li != list.end(); ++li) {
 210                         v3s16 p = *li + center;
 211
 212                         /*
 213                                 Send throttling
 214                                 - Don't allow too many simultaneous transfers
 215                                 - EXCEPT when the blocks are very close
 216
 217                                 Also, don't send blocks that are already flying.
 218                         */
 219
 220                         // Start with the usual maximum
 221                         u16 max_simul_dynamic = max_simul_sends_usually;
 222
 223                         // If block is very close, allow full maximum
 224                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 225                                 max_simul_dynamic = max_simul_sends_setting;
 226
 227                         // Don't select too many blocks for sending
 228                         if (num_blocks_selected >= max_simul_dynamic) {
 229                                 //queue_is_full = true;
 230                                 goto queue_full_break;
 231                         }
 232
 233                         // Don't send blocks that are currently being transferred
 234                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 235                                 continue;
 236
 237                         /*
 238                                 Do not go over max mapgen limit
 239                         */
 240                         if (blockpos_over_max_limit(p))
 241                                 continue;
 242
 243                         // If this is true, inexistent block will be made from scratch
 244                         bool generate = d <= d_max_gen;
 245
 246                         /*
 247                                 Don't generate or send if not in sight
 248                                 FIXME This only works if the client uses a small enough
 249                                 FOV setting. The default of 72 degrees is fine.
 250                         */
 251
 252                         f32 dist;
 253                         if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
 254                                 continue;
 255                         }
 256
 257                         /*
 258                                 Don't send already sent blocks
 259                         */
 260                         {
 261                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 262                                 {
 263                                         continue;
 264                                 }
 265                         }
 266
 267                         /*
 268                                 Check if map has this block
 269                         */
 270                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 271
 272                         bool surely_not_found_on_disk = false;
 273                         bool block_is_invalid = false;
 274                         if (block) {
 275                                 // Reset usage timer, this block will be of use in the future.
 276                                 block->resetUsageTimer();
 277
 278                                 // Block is dummy if data doesn't exist.
 279                                 // It means it has been not found from disk and not generated
 280                                 if (block->isDummy()) {
 281                                         surely_not_found_on_disk = true;
 282                                 }
 283
 284                                 if (!block->isGenerated())
 285                                         block_is_invalid = true;
 286
 287                                 /*
 288                                         If block is not close, don't send it unless it is near
 289                                         ground level.
 290
 291                                         Block is near ground level if night-time mesh
 292                                         differs from day-time mesh.
 293                                 */
 294                                 if (d >= d_opt) {
 295                                         if (!block->getDayNightDiff())
 296                                                 continue;
 297                                 }
 298
 299                                 if (occ_cull && !block_is_invalid &&
 300                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 301                                         continue;
 302                                 }
 303                         }
 304
 305                         /*
 306                                 If block has been marked to not exist on disk (dummy)
 307                                 and generating new ones is not wanted, skip block.
 308                         */
 309                         if (!generate && surely_not_found_on_disk) {
 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)dist, 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 > full_d_max){
 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_modified.find(p) == m_blocks_modified.end()) {
 372                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 373                         m_blocks_sending.erase(p);
 374                 else
 375                         m_excess_gotblocks++;
 376
 377                 m_blocks_sent.insert(p);
 378         }
 379 }
 380
 381 void RemoteClient::SentBlock(v3s16 p)
 382 {
 383         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 384                 m_blocks_modified.erase(p);
 385
 386         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 387                 m_blocks_sending[p] = 0.0;
 388         else
 389                 infostream<<"RemoteClient::SentBlock(): Sent block"
 390                                 " already in m_blocks_sending"<<std::endl;
 391 }
 392
 393 void RemoteClient::SetBlockNotSent(v3s16 p)
 394 {
 395         m_nearest_unsent_d = 0;
 396         m_nothing_to_send_pause_timer = 0;
 397
 398         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 399                 m_blocks_sending.erase(p);
 400         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 401                 m_blocks_sent.erase(p);
 402         m_blocks_modified.insert(p);
 403 }
 404
 405 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 406 {
 407         m_nearest_unsent_d = 0;
 408         m_nothing_to_send_pause_timer = 0;
 409
 410         for (auto &block : blocks) {
 411                 v3s16 p = block.first;
 412                 m_blocks_modified.insert(p);
 413
 414                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 415                         m_blocks_sending.erase(p);
 416                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 417                         m_blocks_sent.erase(p);
 418         }
 419 }
 420
 421 void RemoteClient::notifyEvent(ClientStateEvent event)
 422 {
 423         std::ostringstream myerror;
 424         switch (m_state)
 425         {
 426         case CS_Invalid:
 427                 //intentionally do nothing
 428                 break;
 429         case CS_Created:
 430                 switch (event) {
 431                 case CSE_Hello:
 432                         m_state = CS_HelloSent;
 433                         break;
 434                 case CSE_InitLegacy:
 435                         m_state = CS_AwaitingInit2;
 436                         break;
 437                 case CSE_Disconnect:
 438                         m_state = CS_Disconnecting;
 439                         break;
 440                 case CSE_SetDenied:
 441                         m_state = CS_Denied;
 442                         break;
 443                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 444                 default:
 445                         myerror << "Created: Invalid client state transition! " << event;
 446                         throw ClientStateError(myerror.str());
 447                 }
 448                 break;
 449         case CS_Denied:
 450                 /* don't do anything if in denied state */
 451                 break;
 452         case CS_HelloSent:
 453                 switch(event)
 454                 {
 455                 case CSE_AuthAccept:
 456                         m_state = CS_AwaitingInit2;
 457                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 458                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 459                                 srp_verifier_delete((SRPVerifier *) auth_data);
 460                         chosen_mech = AUTH_MECHANISM_NONE;
 461                         break;
 462                 case CSE_Disconnect:
 463                         m_state = CS_Disconnecting;
 464                         break;
 465                 case CSE_SetDenied:
 466                         m_state = CS_Denied;
 467                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 468                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 469                                 srp_verifier_delete((SRPVerifier *) auth_data);
 470                         chosen_mech = AUTH_MECHANISM_NONE;
 471                         break;
 472                 default:
 473                         myerror << "HelloSent: Invalid client state transition! " << event;
 474                         throw ClientStateError(myerror.str());
 475                 }
 476                 break;
 477         case CS_AwaitingInit2:
 478                 switch(event)
 479                 {
 480                 case CSE_GotInit2:
 481                         confirmSerializationVersion();
 482                         m_state = CS_InitDone;
 483                         break;
 484                 case CSE_Disconnect:
 485                         m_state = CS_Disconnecting;
 486                         break;
 487                 case CSE_SetDenied:
 488                         m_state = CS_Denied;
 489                         break;
 490
 491                 /* Init SetDefinitionsSent SetMediaSent */
 492                 default:
 493                         myerror << "InitSent: Invalid client state transition! " << event;
 494                         throw ClientStateError(myerror.str());
 495                 }
 496                 break;
 497
 498         case CS_InitDone:
 499                 switch(event)
 500                 {
 501                 case CSE_SetDefinitionsSent:
 502                         m_state = CS_DefinitionsSent;
 503                         break;
 504                 case CSE_Disconnect:
 505                         m_state = CS_Disconnecting;
 506                         break;
 507                 case CSE_SetDenied:
 508                         m_state = CS_Denied;
 509                         break;
 510
 511                 /* Init GotInit2 SetMediaSent */
 512                 default:
 513                         myerror << "InitDone: Invalid client state transition! " << event;
 514                         throw ClientStateError(myerror.str());
 515                 }
 516                 break;
 517         case CS_DefinitionsSent:
 518                 switch(event)
 519                 {
 520                 case CSE_SetClientReady:
 521                         m_state = CS_Active;
 522                         break;
 523                 case CSE_Disconnect:
 524                         m_state = CS_Disconnecting;
 525                         break;
 526                 case CSE_SetDenied:
 527                         m_state = CS_Denied;
 528                         break;
 529                 /* Init GotInit2 SetDefinitionsSent */
 530                 default:
 531                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 532                         throw ClientStateError(myerror.str());
 533                 }
 534                 break;
 535         case CS_Active:
 536                 switch(event)
 537                 {
 538                 case CSE_SetDenied:
 539                         m_state = CS_Denied;
 540                         break;
 541                 case CSE_Disconnect:
 542                         m_state = CS_Disconnecting;
 543                         break;
 544                 case CSE_SudoSuccess:
 545                         m_state = CS_SudoMode;
 546                         if (chosen_mech == AUTH_MECHANISM_SRP)
 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 u64 RemoteClient::uptime() const
 582 {
 583         return porting::getTimeS() - m_connection_time;
 584 }
 585
 586 ClientInterface::ClientInterface(const std::shared_ptr<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 (auto &client_it : m_clients) {
 603                         // Delete client
 604                         delete client_it.second;
 605                 }
 606         }
 607 }
 608
 609 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 610 {
 611         std::vector<u16> reply;
 612         MutexAutoLock clientslock(m_clients_mutex);
 613
 614         for (const auto &m_client : m_clients) {
 615                 if (m_client.second->getState() >= min_state)
 616                         reply.push_back(m_client.second->peer_id);
 617         }
 618
 619         return reply;
 620 }
 621
 622 /**
 623  * Verify if user limit was reached.
 624  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 625  * @return true if user limit was reached
 626  */
 627 bool ClientInterface::isUserLimitReached()
 628 {
 629         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 630 }
 631
 632 void ClientInterface::step(float dtime)
 633 {
 634         m_print_info_timer += dtime;
 635         if(m_print_info_timer >= 30.0)
 636         {
 637                 m_print_info_timer = 0.0;
 638                 UpdatePlayerList();
 639         }
 640 }
 641
 642 void ClientInterface::UpdatePlayerList()
 643 {
 644         if (m_env) {
 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 (u16 i : clients) {
 653                         RemotePlayer *player = m_env->getPlayer(i);
 654
 655                         if (player == NULL)
 656                                 continue;
 657
 658                         infostream << "* " << player->getName() << "\t";
 659
 660                         {
 661                                 MutexAutoLock clientslock(m_clients_mutex);
 662                                 RemoteClient* client = lockedGetClientNoEx(i);
 663                                 if (client)
 664                                         client->PrintInfo(infostream);
 665                         }
 666
 667                         m_clients_names.emplace_back(player->getName());
 668                 }
 669         }
 670 }
 671
 672 void ClientInterface::send(u16 peer_id, u8 channelnum,
 673                 NetworkPacket* pkt, bool reliable)
 674 {
 675         m_con->Send(peer_id, channelnum, pkt, reliable);
 676 }
 677
 678 void ClientInterface::sendToAll(NetworkPacket *pkt)
 679 {
 680         MutexAutoLock clientslock(m_clients_mutex);
 681         for (auto &client_it : m_clients) {
 682                 RemoteClient *client = client_it.second;
 683
 684                 if (client->net_proto_version != 0) {
 685                         m_con->Send(client->peer_id,
 686                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 687                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 688                 }
 689         }
 690 }
 691
 692 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 693                 u16 min_proto_ver)
 694 {
 695         MutexAutoLock clientslock(m_clients_mutex);
 696         for (auto &client_it : m_clients) {
 697                 RemoteClient *client = client_it.second;
 698                 NetworkPacket *pkt_to_send = nullptr;
 699
 700                 if (client->net_proto_version >= min_proto_ver) {
 701                         pkt_to_send = pkt;
 702                 } else if (client->net_proto_version != 0) {
 703                         pkt_to_send = legacypkt;
 704                 } else {
 705                         warningstream << "Client with unhandled version to handle: '"
 706                                 << client->net_proto_version << "'";
 707                         continue;
 708                 }
 709
 710                 m_con->Send(client->peer_id,
 711                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 712                         pkt_to_send,
 713                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 714         }
 715 }
 716
 717 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 718 {
 719         MutexAutoLock clientslock(m_clients_mutex);
 720         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 721         // The client may not exist; clients are immediately removed if their
 722         // access is denied, and this event occurs later then.
 723         if (n == m_clients.end())
 724                 return NULL;
 725
 726         if (n->second->getState() >= state_min)
 727                 return n->second;
 728
 729         return NULL;
 730 }
 731
 732 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 733 {
 734         RemoteClientMap::const_iterator 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 NULL;
 739
 740         if (n->second->getState() >= state_min)
 741                 return n->second;
 742
 743         return NULL;
 744 }
 745
 746 ClientState ClientInterface::getClientState(u16 peer_id)
 747 {
 748         MutexAutoLock clientslock(m_clients_mutex);
 749         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 750         // The client may not exist; clients are immediately removed if their
 751         // access is denied, and this event occurs later then.
 752         if (n == m_clients.end())
 753                 return CS_Invalid;
 754
 755         return n->second->getState();
 756 }
 757
 758 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 759 {
 760         MutexAutoLock clientslock(m_clients_mutex);
 761         RemoteClientMap::iterator n = m_clients.find(peer_id);
 762         // The client may not exist; clients are immediately removed if their
 763         // access is denied, and this event occurs later then.
 764         if (n != m_clients.end())
 765                 n->second->setName(name);
 766 }
 767
 768 void ClientInterface::DeleteClient(u16 peer_id)
 769 {
 770         MutexAutoLock conlock(m_clients_mutex);
 771
 772         // Error check
 773         RemoteClientMap::iterator n = m_clients.find(peer_id);
 774         // The client may not exist; clients are immediately removed if their
 775         // access is denied, and this event occurs later then.
 776         if (n == m_clients.end())
 777                 return;
 778
 779         /*
 780                 Mark objects to be not known by the client
 781         */
 782         //TODO this should be done by client destructor!!!
 783         RemoteClient *client = n->second;
 784         // Handle objects
 785         for (u16 id : client->m_known_objects) {
 786                 // Get object
 787                 ServerActiveObject* obj = m_env->getActiveObject(id);
 788
 789                 if(obj && obj->m_known_by_count > 0)
 790                         obj->m_known_by_count--;
 791         }
 792
 793         // Delete client
 794         delete m_clients[peer_id];
 795         m_clients.erase(peer_id);
 796 }
 797
 798 void ClientInterface::CreateClient(u16 peer_id)
 799 {
 800         MutexAutoLock conlock(m_clients_mutex);
 801
 802         // Error check
 803         RemoteClientMap::iterator n = m_clients.find(peer_id);
 804         // The client shouldn't already exist
 805         if (n != m_clients.end()) return;
 806
 807         // Create client
 808         RemoteClient *client = new RemoteClient();
 809         client->peer_id = peer_id;
 810         m_clients[client->peer_id] = client;
 811 }
 812
 813 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 814 {
 815         {
 816                 MutexAutoLock clientlock(m_clients_mutex);
 817
 818                 // Error check
 819                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 820
 821                 // No client to deliver event
 822                 if (n == m_clients.end())
 823                         return;
 824                 n->second->notifyEvent(event);
 825         }
 826
 827         if ((event == CSE_SetClientReady) ||
 828                 (event == CSE_Disconnect)     ||
 829                 (event == CSE_SetDenied))
 830         {
 831                 UpdatePlayerList();
 832         }
 833 }
 834
 835 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 836 {
 837         MutexAutoLock conlock(m_clients_mutex);
 838
 839         // Error check
 840         RemoteClientMap::iterator n = m_clients.find(peer_id);
 841
 842         // No client to get version
 843         if (n == m_clients.end())
 844                 return 0;
 845
 846         return n->second->net_proto_version;
 847 }
 848
 849 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 850 {
 851         MutexAutoLock conlock(m_clients_mutex);
 852
 853         // Error check
 854         RemoteClientMap::iterator n = m_clients.find(peer_id);
 855
 856         // No client to set versions
 857         if (n == m_clients.end())
 858                 return;
 859
 860         n->second->setVersionInfo(major,minor,patch,full);
 861 }