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         DSTACK(FUNCTION_NAME);
  70
  71
  72         // Increment timers
  73         m_nothing_to_send_pause_timer -= dtime;
  74         m_nearest_unsent_reset_timer += dtime;
  75
  76         if(m_nothing_to_send_pause_timer >= 0)
  77                 return;
  78
  79         RemotePlayer *player = env->getPlayer(peer_id);
  80         // This can happen sometimes; clients and players are not in perfect sync.
  81         if (!player)
  82                 return;
  83
  84         PlayerSAO *sao = player->getPlayerSAO();
  85         if (!sao)
  86                 return;
  87
  88         // Won't send anything if already sending
  89         if(m_blocks_sending.size() >= g_settings->getU16
  90                         ("max_simultaneous_block_sends_per_client"))
  91         {
  92                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  93                 return;
  94         }
  95
  96         v3f playerpos = sao->getBasePosition();
  97         const v3f &playerspeed = player->getSpeed();
  98         v3f playerspeeddir(0,0,0);
  99         if(playerspeed.getLength() > 1.0*BS)
 100                 playerspeeddir = playerspeed / playerspeed.getLength();
 101         // Predict to next block
 102         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 103
 104         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 105
 106         v3s16 center = getNodeBlockPos(center_nodepos);
 107
 108         // Camera position and direction
 109         v3f camera_pos = sao->getEyePosition();
 110         v3f camera_dir = v3f(0,0,1);
 111         camera_dir.rotateYZBy(sao->getPitch());
 112         camera_dir.rotateXZBy(sao->getYaw());
 113
 114         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 115                         <<camera_dir.Z<<")"<<std::endl;*/
 116
 117         /*
 118                 Get the starting value of the block finder radius.
 119         */
 120
 121         if(m_last_center != center)
 122         {
 123                 m_nearest_unsent_d = 0;
 124                 m_last_center = center;
 125         }
 126
 127         /*infostream<<"m_nearest_unsent_reset_timer="
 128                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 129
 130         // Reset periodically to workaround for some bugs or stuff
 131         if(m_nearest_unsent_reset_timer > 20.0)
 132         {
 133                 m_nearest_unsent_reset_timer = 0;
 134                 m_nearest_unsent_d = 0;
 135                 //infostream<<"Resetting m_nearest_unsent_d for "
 136                 //              <<server->getPlayerName(peer_id)<<std::endl;
 137         }
 138
 139         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 140         s16 d_start = m_nearest_unsent_d;
 141
 142         //infostream<<"d_start="<<d_start<<std::endl;
 143
 144         u16 max_simul_sends_setting = g_settings->getU16
 145                         ("max_simultaneous_block_sends_per_client");
 146         u16 max_simul_sends_usually = max_simul_sends_setting;
 147
 148         /*
 149                 Check the time from last addNode/removeNode.
 150
 151                 Decrease send rate if player is building stuff.
 152         */
 153         m_time_from_building += dtime;
 154         if(m_time_from_building < g_settings->getFloat(
 155                                 "full_block_send_enable_min_time_from_building"))
 156         {
 157                 max_simul_sends_usually
 158                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 159         }
 160
 161         /*
 162                 Number of blocks sending + number of blocks selected for sending
 163         */
 164         u32 num_blocks_selected = m_blocks_sending.size();
 165
 166         /*
 167                 next time d will be continued from the d from which the nearest
 168                 unsent block was found this time.
 169
 170                 This is because not necessarily any of the blocks found this
 171                 time are actually sent.
 172         */
 173         s32 new_nearest_unsent_d = -1;
 174
 175         // get view range and camera fov from the client
 176         s16 wanted_range = sao->getWantedRange();
 177         float camera_fov = sao->getFov();
 178         // if FOV, wanted_range are not available (old client), fall back to old default
 179         if (wanted_range <= 0) wanted_range = 1000;
 180         if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
 181
 182         const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
 183         const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
 184         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 185         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 186
 187         s16 d_max = full_d_max;
 188         s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 189
 190         // Don't loop very much at a time
 191         s16 max_d_increment_at_time = 2;
 192         if(d_max > d_start + max_d_increment_at_time)
 193                 d_max = d_start + max_d_increment_at_time;
 194
 195         s32 nearest_emerged_d = -1;
 196         s32 nearest_emergefull_d = -1;
 197         s32 nearest_sent_d = -1;
 198         //bool queue_is_full = false;
 199
 200         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 201         const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
 202
 203         s16 d;
 204         for(d = d_start; d <= d_max; d++) {
 205                 /*
 206                         Get the border/face dot coordinates of a "d-radiused"
 207                         box
 208                 */
 209                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 210
 211                 std::vector<v3s16>::iterator li;
 212                 for(li = list.begin(); li != list.end(); ++li) {
 213                         v3s16 p = *li + center;
 214
 215                         /*
 216                                 Send throttling
 217                                 - Don't allow too many simultaneous transfers
 218                                 - EXCEPT when the blocks are very close
 219
 220                                 Also, don't send blocks that are already flying.
 221                         */
 222
 223                         // Start with the usual maximum
 224                         u16 max_simul_dynamic = max_simul_sends_usually;
 225
 226                         // If block is very close, allow full maximum
 227                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 228                                 max_simul_dynamic = max_simul_sends_setting;
 229
 230                         // Don't select too many blocks for sending
 231                         if (num_blocks_selected >= max_simul_dynamic) {
 232                                 //queue_is_full = true;
 233                                 goto queue_full_break;
 234                         }
 235
 236                         // Don't send blocks that are currently being transferred
 237                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 238                                 continue;
 239
 240                         /*
 241                                 Do not go over max mapgen limit
 242                         */
 243                         if (blockpos_over_max_limit(p))
 244                                 continue;
 245
 246                         // If this is true, inexistent block will be made from scratch
 247                         bool generate = d <= d_max_gen;
 248
 249                         /*
 250                                 Don't generate or send if not in sight
 251                                 FIXME This only works if the client uses a small enough
 252                                 FOV setting. The default of 72 degrees is fine.
 253                         */
 254
 255                         f32 dist;
 256                         if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
 257                                 continue;
 258                         }
 259
 260                         /*
 261                                 Don't send already sent blocks
 262                         */
 263                         {
 264                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 265                                 {
 266                                         continue;
 267                                 }
 268                         }
 269
 270                         /*
 271                                 Check if map has this block
 272                         */
 273                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 274
 275                         bool surely_not_found_on_disk = false;
 276                         bool block_is_invalid = false;
 277                         if (block) {
 278                                 // Reset usage timer, this block will be of use in the future.
 279                                 block->resetUsageTimer();
 280
 281                                 // Block is dummy if data doesn't exist.
 282                                 // It means it has been not found from disk and not generated
 283                                 if (block->isDummy()) {
 284                                         surely_not_found_on_disk = true;
 285                                 }
 286
 287                                 if (!block->isGenerated())
 288                                         block_is_invalid = true;
 289
 290                                 /*
 291                                         If block is not close, don't send it unless it is near
 292                                         ground level.
 293
 294                                         Block is near ground level if night-time mesh
 295                                         differs from day-time mesh.
 296                                 */
 297                                 if (d >= d_opt) {
 298                                         if (!block->getDayNightDiff())
 299                                                 continue;
 300                                 }
 301
 302                                 if (occ_cull && !block_is_invalid &&
 303                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 304                                         continue;
 305                                 }
 306                         }
 307
 308                         /*
 309                                 If block has been marked to not exist on disk (dummy)
 310                                 and generating new ones is not wanted, skip block.
 311                         */
 312                         if (!generate && surely_not_found_on_disk) {
 313                                 // get next one.
 314                                 continue;
 315                         }
 316
 317                         /*
 318                                 Add inexistent block to emerge queue.
 319                         */
 320                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 321                         {
 322                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 323                                         if (nearest_emerged_d == -1)
 324                                                 nearest_emerged_d = d;
 325                                 } else {
 326                                         if (nearest_emergefull_d == -1)
 327                                                 nearest_emergefull_d = d;
 328                                         goto queue_full_break;
 329                                 }
 330
 331                                 // get next one.
 332                                 continue;
 333                         }
 334
 335                         if(nearest_sent_d == -1)
 336                                 nearest_sent_d = d;
 337
 338                         /*
 339                                 Add block to send queue
 340                         */
 341                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 342
 343                         dest.push_back(q);
 344
 345                         num_blocks_selected += 1;
 346                 }
 347         }
 348 queue_full_break:
 349
 350         // If nothing was found for sending and nothing was queued for
 351         // emerging, continue next time browsing from here
 352         if(nearest_emerged_d != -1){
 353                 new_nearest_unsent_d = nearest_emerged_d;
 354         } else if(nearest_emergefull_d != -1){
 355                 new_nearest_unsent_d = nearest_emergefull_d;
 356         } else {
 357                 if(d > full_d_max){
 358                         new_nearest_unsent_d = 0;
 359                         m_nothing_to_send_pause_timer = 2.0;
 360                 } else {
 361                         if(nearest_sent_d != -1)
 362                                 new_nearest_unsent_d = nearest_sent_d;
 363                         else
 364                                 new_nearest_unsent_d = d;
 365                 }
 366         }
 367
 368         if(new_nearest_unsent_d != -1)
 369                 m_nearest_unsent_d = new_nearest_unsent_d;
 370 }
 371
 372 void RemoteClient::GotBlock(v3s16 p)
 373 {
 374         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 375                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 376                         m_blocks_sending.erase(p);
 377                 else
 378                         m_excess_gotblocks++;
 379
 380                 m_blocks_sent.insert(p);
 381         }
 382 }
 383
 384 void RemoteClient::SentBlock(v3s16 p)
 385 {
 386         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 387                 m_blocks_modified.erase(p);
 388
 389         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 390                 m_blocks_sending[p] = 0.0;
 391         else
 392                 infostream<<"RemoteClient::SentBlock(): Sent block"
 393                                 " already in m_blocks_sending"<<std::endl;
 394 }
 395
 396 void RemoteClient::SetBlockNotSent(v3s16 p)
 397 {
 398         m_nearest_unsent_d = 0;
 399         m_nothing_to_send_pause_timer = 0;
 400
 401         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 402                 m_blocks_sending.erase(p);
 403         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 404                 m_blocks_sent.erase(p);
 405         m_blocks_modified.insert(p);
 406 }
 407
 408 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 409 {
 410         m_nearest_unsent_d = 0;
 411         m_nothing_to_send_pause_timer = 0;
 412
 413         for (auto &block : blocks) {
 414                 v3s16 p = block.first;
 415                 m_blocks_modified.insert(p);
 416
 417                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 418                         m_blocks_sending.erase(p);
 419                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 420                         m_blocks_sent.erase(p);
 421         }
 422 }
 423
 424 void RemoteClient::notifyEvent(ClientStateEvent event)
 425 {
 426         std::ostringstream myerror;
 427         switch (m_state)
 428         {
 429         case CS_Invalid:
 430                 //intentionally do nothing
 431                 break;
 432         case CS_Created:
 433                 switch (event) {
 434                 case CSE_Hello:
 435                         m_state = CS_HelloSent;
 436                         break;
 437                 case CSE_InitLegacy:
 438                         m_state = CS_AwaitingInit2;
 439                         break;
 440                 case CSE_Disconnect:
 441                         m_state = CS_Disconnecting;
 442                         break;
 443                 case CSE_SetDenied:
 444                         m_state = CS_Denied;
 445                         break;
 446                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 447                 default:
 448                         myerror << "Created: Invalid client state transition! " << event;
 449                         throw ClientStateError(myerror.str());
 450                 }
 451                 break;
 452         case CS_Denied:
 453                 /* don't do anything if in denied state */
 454                 break;
 455         case CS_HelloSent:
 456                 switch(event)
 457                 {
 458                 case CSE_AuthAccept:
 459                         m_state = CS_AwaitingInit2;
 460                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 461                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 462                                 srp_verifier_delete((SRPVerifier *) auth_data);
 463                         chosen_mech = AUTH_MECHANISM_NONE;
 464                         break;
 465                 case CSE_Disconnect:
 466                         m_state = CS_Disconnecting;
 467                         break;
 468                 case CSE_SetDenied:
 469                         m_state = CS_Denied;
 470                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 471                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 472                                 srp_verifier_delete((SRPVerifier *) auth_data);
 473                         chosen_mech = AUTH_MECHANISM_NONE;
 474                         break;
 475                 default:
 476                         myerror << "HelloSent: Invalid client state transition! " << event;
 477                         throw ClientStateError(myerror.str());
 478                 }
 479                 break;
 480         case CS_AwaitingInit2:
 481                 switch(event)
 482                 {
 483                 case CSE_GotInit2:
 484                         confirmSerializationVersion();
 485                         m_state = CS_InitDone;
 486                         break;
 487                 case CSE_Disconnect:
 488                         m_state = CS_Disconnecting;
 489                         break;
 490                 case CSE_SetDenied:
 491                         m_state = CS_Denied;
 492                         break;
 493
 494                 /* Init SetDefinitionsSent SetMediaSent */
 495                 default:
 496                         myerror << "InitSent: Invalid client state transition! " << event;
 497                         throw ClientStateError(myerror.str());
 498                 }
 499                 break;
 500
 501         case CS_InitDone:
 502                 switch(event)
 503                 {
 504                 case CSE_SetDefinitionsSent:
 505                         m_state = CS_DefinitionsSent;
 506                         break;
 507                 case CSE_Disconnect:
 508                         m_state = CS_Disconnecting;
 509                         break;
 510                 case CSE_SetDenied:
 511                         m_state = CS_Denied;
 512                         break;
 513
 514                 /* Init GotInit2 SetMediaSent */
 515                 default:
 516                         myerror << "InitDone: Invalid client state transition! " << event;
 517                         throw ClientStateError(myerror.str());
 518                 }
 519                 break;
 520         case CS_DefinitionsSent:
 521                 switch(event)
 522                 {
 523                 case CSE_SetClientReady:
 524                         m_state = CS_Active;
 525                         break;
 526                 case CSE_Disconnect:
 527                         m_state = CS_Disconnecting;
 528                         break;
 529                 case CSE_SetDenied:
 530                         m_state = CS_Denied;
 531                         break;
 532                 /* Init GotInit2 SetDefinitionsSent */
 533                 default:
 534                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 535                         throw ClientStateError(myerror.str());
 536                 }
 537                 break;
 538         case CS_Active:
 539                 switch(event)
 540                 {
 541                 case CSE_SetDenied:
 542                         m_state = CS_Denied;
 543                         break;
 544                 case CSE_Disconnect:
 545                         m_state = CS_Disconnecting;
 546                         break;
 547                 case CSE_SudoSuccess:
 548                         m_state = CS_SudoMode;
 549                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 550                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 551                                 srp_verifier_delete((SRPVerifier *) auth_data);
 552                         chosen_mech = AUTH_MECHANISM_NONE;
 553                         break;
 554                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 555                 default:
 556                         myerror << "Active: Invalid client state transition! " << event;
 557                         throw ClientStateError(myerror.str());
 558                         break;
 559                 }
 560                 break;
 561         case CS_SudoMode:
 562                 switch(event)
 563                 {
 564                 case CSE_SetDenied:
 565                         m_state = CS_Denied;
 566                         break;
 567                 case CSE_Disconnect:
 568                         m_state = CS_Disconnecting;
 569                         break;
 570                 case CSE_SudoLeave:
 571                         m_state = CS_Active;
 572                         break;
 573                 default:
 574                         myerror << "Active: Invalid client state transition! " << event;
 575                         throw ClientStateError(myerror.str());
 576                         break;
 577                 }
 578                 break;
 579         case CS_Disconnecting:
 580                 /* we are already disconnecting */
 581                 break;
 582         }
 583 }
 584
 585 u64 RemoteClient::uptime() const
 586 {
 587         return porting::getTimeS() - m_connection_time;
 588 }
 589
 590 ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
 591 :
 592         m_con(con),
 593         m_env(NULL),
 594         m_print_info_timer(0.0)
 595 {
 596
 597 }
 598 ClientInterface::~ClientInterface()
 599 {
 600         /*
 601                 Delete clients
 602         */
 603         {
 604                 MutexAutoLock clientslock(m_clients_mutex);
 605
 606                 for (auto &client_it : m_clients) {
 607                         // Delete client
 608                         delete client_it.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 (const auto &m_client : m_clients) {
 619                 if (m_client.second->getState() >= min_state)
 620                         reply.push_back(m_client.second->peer_id);
 621         }
 622
 623         return reply;
 624 }
 625
 626 /**
 627  * Verify if user limit was reached.
 628  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 629  * @return true if user limit was reached
 630  */
 631 bool ClientInterface::isUserLimitReached()
 632 {
 633         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 634 }
 635
 636 void ClientInterface::step(float dtime)
 637 {
 638         m_print_info_timer += dtime;
 639         if(m_print_info_timer >= 30.0)
 640         {
 641                 m_print_info_timer = 0.0;
 642                 UpdatePlayerList();
 643         }
 644 }
 645
 646 void ClientInterface::UpdatePlayerList()
 647 {
 648         if (m_env) {
 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 (u16 i : clients) {
 657                         RemotePlayer *player = m_env->getPlayer(i);
 658
 659                         if (player == NULL)
 660                                 continue;
 661
 662                         infostream << "* " << player->getName() << "\t";
 663
 664                         {
 665                                 MutexAutoLock clientslock(m_clients_mutex);
 666                                 RemoteClient* client = lockedGetClientNoEx(i);
 667                                 if (client)
 668                                         client->PrintInfo(infostream);
 669                         }
 670
 671                         m_clients_names.emplace_back(player->getName());
 672                 }
 673         }
 674 }
 675
 676 void ClientInterface::send(u16 peer_id, u8 channelnum,
 677                 NetworkPacket* pkt, bool reliable)
 678 {
 679         m_con->Send(peer_id, channelnum, pkt, reliable);
 680 }
 681
 682 void ClientInterface::sendToAll(NetworkPacket *pkt)
 683 {
 684         MutexAutoLock clientslock(m_clients_mutex);
 685         for (auto &client_it : m_clients) {
 686                 RemoteClient *client = client_it.second;
 687
 688                 if (client->net_proto_version != 0) {
 689                         m_con->Send(client->peer_id,
 690                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 691                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 692                 }
 693         }
 694 }
 695
 696 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 697                 u16 min_proto_ver)
 698 {
 699         MutexAutoLock clientslock(m_clients_mutex);
 700         for (auto &client_it : m_clients) {
 701                 RemoteClient *client = client_it.second;
 702                 NetworkPacket *pkt_to_send = nullptr;
 703
 704                 if (client->net_proto_version >= min_proto_ver) {
 705                         pkt_to_send = pkt;
 706                 } else if (client->net_proto_version != 0) {
 707                         pkt_to_send = legacypkt;
 708                 } else {
 709                         warningstream << "Client with unhandled version to handle: '"
 710                                 << client->net_proto_version << "'";
 711                         continue;
 712                 }
 713
 714                 m_con->Send(client->peer_id,
 715                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 716                         pkt_to_send,
 717                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 718         }
 719 }
 720
 721 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 722 {
 723         MutexAutoLock clientslock(m_clients_mutex);
 724         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 725         // The client may not exist; clients are immediately removed if their
 726         // access is denied, and this event occurs later then.
 727         if (n == m_clients.end())
 728                 return NULL;
 729
 730         if (n->second->getState() >= state_min)
 731                 return n->second;
 732
 733         return NULL;
 734 }
 735
 736 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 737 {
 738         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 739         // The client may not exist; clients are immediately removed if their
 740         // access is denied, and this event occurs later then.
 741         if (n == m_clients.end())
 742                 return NULL;
 743
 744         if (n->second->getState() >= state_min)
 745                 return n->second;
 746
 747         return NULL;
 748 }
 749
 750 ClientState ClientInterface::getClientState(u16 peer_id)
 751 {
 752         MutexAutoLock clientslock(m_clients_mutex);
 753         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 754         // The client may not exist; clients are immediately removed if their
 755         // access is denied, and this event occurs later then.
 756         if (n == m_clients.end())
 757                 return CS_Invalid;
 758
 759         return n->second->getState();
 760 }
 761
 762 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 763 {
 764         MutexAutoLock clientslock(m_clients_mutex);
 765         RemoteClientMap::iterator n = m_clients.find(peer_id);
 766         // The client may not exist; clients are immediately removed if their
 767         // access is denied, and this event occurs later then.
 768         if (n != m_clients.end())
 769                 n->second->setName(name);
 770 }
 771
 772 void ClientInterface::DeleteClient(u16 peer_id)
 773 {
 774         MutexAutoLock conlock(m_clients_mutex);
 775
 776         // Error check
 777         RemoteClientMap::iterator n = m_clients.find(peer_id);
 778         // The client may not exist; clients are immediately removed if their
 779         // access is denied, and this event occurs later then.
 780         if (n == m_clients.end())
 781                 return;
 782
 783         /*
 784                 Mark objects to be not known by the client
 785         */
 786         //TODO this should be done by client destructor!!!
 787         RemoteClient *client = n->second;
 788         // Handle objects
 789         for (u16 id : client->m_known_objects) {
 790                 // Get object
 791                 ServerActiveObject* obj = m_env->getActiveObject(id);
 792
 793                 if(obj && obj->m_known_by_count > 0)
 794                         obj->m_known_by_count--;
 795         }
 796
 797         // Delete client
 798         delete m_clients[peer_id];
 799         m_clients.erase(peer_id);
 800 }
 801
 802 void ClientInterface::CreateClient(u16 peer_id)
 803 {
 804         MutexAutoLock conlock(m_clients_mutex);
 805
 806         // Error check
 807         RemoteClientMap::iterator n = m_clients.find(peer_id);
 808         // The client shouldn't already exist
 809         if (n != m_clients.end()) return;
 810
 811         // Create client
 812         RemoteClient *client = new RemoteClient();
 813         client->peer_id = peer_id;
 814         m_clients[client->peer_id] = client;
 815 }
 816
 817 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 818 {
 819         {
 820                 MutexAutoLock clientlock(m_clients_mutex);
 821
 822                 // Error check
 823                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 824
 825                 // No client to deliver event
 826                 if (n == m_clients.end())
 827                         return;
 828                 n->second->notifyEvent(event);
 829         }
 830
 831         if ((event == CSE_SetClientReady) ||
 832                 (event == CSE_Disconnect)     ||
 833                 (event == CSE_SetDenied))
 834         {
 835                 UpdatePlayerList();
 836         }
 837 }
 838
 839 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 840 {
 841         MutexAutoLock conlock(m_clients_mutex);
 842
 843         // Error check
 844         RemoteClientMap::iterator n = m_clients.find(peer_id);
 845
 846         // No client to get version
 847         if (n == m_clients.end())
 848                 return 0;
 849
 850         return n->second->net_proto_version;
 851 }
 852
 853 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 854 {
 855         MutexAutoLock conlock(m_clients_mutex);
 856
 857         // Error check
 858         RemoteClientMap::iterator n = m_clients.find(peer_id);
 859
 860         // No client to set versions
 861         if (n == m_clients.end())
 862                 return;
 863
 864         n->second->setVersionInfo(major,minor,patch,full);
 865 }