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 RemoteClient::RemoteClient() :
  56         m_max_simul_sends(g_settings->getU16("max_simultaneous_block_sends_per_client")),
  57         m_min_time_from_building(
  58                 g_settings->getFloat("full_block_send_enable_min_time_from_building")),
  59         m_max_send_distance(g_settings->getS16("max_block_send_distance")),
  60         m_block_optimize_distance(g_settings->getS16("block_send_optimize_distance")),
  61         m_max_gen_distance(g_settings->getS16("max_block_generate_distance")),
  62         m_occ_cull(g_settings->getBool("server_side_occlusion_culling"))
  63 {
  64 }
  65
  66 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  67 {
  68         // if this block is on wire, mark it for sending again as soon as possible
  69         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  70                 SetBlockNotSent(p);
  71         }
  72 }
  73
  74 LuaEntitySAO *getAttachedObject(PlayerSAO *sao, ServerEnvironment *env)
  75 {
  76         if (!sao->isAttached())
  77                 return nullptr;
  78
  79         int id;
  80         std::string bone;
  81         v3f dummy;
  82         sao->getAttachment(&id, &bone, &dummy, &dummy);
  83         ServerActiveObject *ao = env->getActiveObject(id);
  84         while (id && ao) {
  85                 ao->getAttachment(&id, &bone, &dummy, &dummy);
  86                 if (id)
  87                         ao = env->getActiveObject(id);
  88         }
  89         return dynamic_cast<LuaEntitySAO *>(ao);
  90 }
  91
  92 void RemoteClient::GetNextBlocks (
  93                 ServerEnvironment *env,
  94                 EmergeManager * emerge,
  95                 float dtime,
  96                 std::vector<PrioritySortedBlockTransfer> &dest)
  97 {
  98         // Increment timers
  99         m_nothing_to_send_pause_timer -= dtime;
 100         m_nearest_unsent_reset_timer += dtime;
 101
 102         if (m_nothing_to_send_pause_timer >= 0)
 103                 return;
 104
 105         RemotePlayer *player = env->getPlayer(peer_id);
 106         // This can happen sometimes; clients and players are not in perfect sync.
 107         if (!player)
 108                 return;
 109
 110         PlayerSAO *sao = player->getPlayerSAO();
 111         if (!sao)
 112                 return;
 113
 114         // Won't send anything if already sending
 115         if (m_blocks_sending.size() >= m_max_simul_sends) {
 116                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 117                 return;
 118         }
 119
 120         v3f playerpos = sao->getBasePosition();
 121         // if the player is attached, get the velocity from the attached object
 122         LuaEntitySAO *lsao = getAttachedObject(sao, env);
 123         const v3f &playerspeed = lsao? lsao->getVelocity() : player->getSpeed();
 124         v3f playerspeeddir(0,0,0);
 125         if (playerspeed.getLength() > 1.0f * BS)
 126                 playerspeeddir = playerspeed / playerspeed.getLength();
 127         // Predict to next block
 128         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 129
 130         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 131
 132         v3s16 center = getNodeBlockPos(center_nodepos);
 133
 134         // Camera position and direction
 135         v3f camera_pos = sao->getEyePosition();
 136         v3f camera_dir = v3f(0,0,1);
 137         camera_dir.rotateYZBy(sao->getPitch());
 138         camera_dir.rotateXZBy(sao->getYaw());
 139
 140         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 141                         <<camera_dir.Z<<")"<<std::endl;*/
 142
 143         /*
 144                 Get the starting value of the block finder radius.
 145         */
 146
 147         if (m_last_center != center) {
 148                 m_nearest_unsent_d = 0;
 149                 m_last_center = center;
 150         }
 151
 152         /*infostream<<"m_nearest_unsent_reset_timer="
 153                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 154
 155         // Reset periodically to workaround for some bugs or stuff
 156         if (m_nearest_unsent_reset_timer > 20.0f) {
 157                 m_nearest_unsent_reset_timer = 0.0f;
 158                 m_nearest_unsent_d = 0;
 159                 //infostream<<"Resetting m_nearest_unsent_d for "
 160                 //              <<server->getPlayerName(peer_id)<<std::endl;
 161         }
 162
 163         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 164         s16 d_start = m_nearest_unsent_d;
 165
 166         //infostream<<"d_start="<<d_start<<std::endl;
 167
 168         u16 max_simul_sends_usually = m_max_simul_sends;
 169
 170         /*
 171                 Check the time from last addNode/removeNode.
 172
 173                 Decrease send rate if player is building stuff.
 174         */
 175         m_time_from_building += dtime;
 176         if (m_time_from_building < m_min_time_from_building) {
 177                 max_simul_sends_usually
 178                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 179         }
 180
 181         /*
 182                 Number of blocks sending + number of blocks selected for sending
 183         */
 184         u32 num_blocks_selected = m_blocks_sending.size();
 185
 186         /*
 187                 next time d will be continued from the d from which the nearest
 188                 unsent block was found this time.
 189
 190                 This is because not necessarily any of the blocks found this
 191                 time are actually sent.
 192         */
 193         s32 new_nearest_unsent_d = -1;
 194
 195         // get view range and camera fov from the client
 196         s16 wanted_range = sao->getWantedRange() + 1;
 197         float camera_fov = sao->getFov();
 198
 199         const s16 full_d_max = std::min(m_max_send_distance, wanted_range);
 200         const s16 d_opt = std::min(m_block_optimize_distance, wanted_range);
 201         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 202         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 203
 204         s16 d_max = full_d_max;
 205         s16 d_max_gen = std::min(m_max_gen_distance, wanted_range);
 206
 207         // Don't loop very much at a time
 208         s16 max_d_increment_at_time = 2;
 209         if (d_max > d_start + max_d_increment_at_time)
 210                 d_max = d_start + max_d_increment_at_time;
 211
 212         s32 nearest_emerged_d = -1;
 213         s32 nearest_emergefull_d = -1;
 214         s32 nearest_sent_d = -1;
 215         //bool queue_is_full = false;
 216
 217         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 218
 219         s16 d;
 220         for (d = d_start; d <= d_max; d++) {
 221                 /*
 222                         Get the border/face dot coordinates of a "d-radiused"
 223                         box
 224                 */
 225                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 226
 227                 std::vector<v3s16>::iterator li;
 228                 for (li = list.begin(); li != list.end(); ++li) {
 229                         v3s16 p = *li + center;
 230
 231                         /*
 232                                 Send throttling
 233                                 - Don't allow too many simultaneous transfers
 234                                 - EXCEPT when the blocks are very close
 235
 236                                 Also, don't send blocks that are already flying.
 237                         */
 238
 239                         // Start with the usual maximum
 240                         u16 max_simul_dynamic = max_simul_sends_usually;
 241
 242                         // If block is very close, allow full maximum
 243                         if (d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 244                                 max_simul_dynamic = m_max_simul_sends;
 245
 246                         // Don't select too many blocks for sending
 247                         if (num_blocks_selected >= max_simul_dynamic) {
 248                                 //queue_is_full = true;
 249                                 goto queue_full_break;
 250                         }
 251
 252                         // Don't send blocks that are currently being transferred
 253                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 254                                 continue;
 255
 256                         /*
 257                                 Do not go over max mapgen limit
 258                         */
 259                         if (blockpos_over_max_limit(p))
 260                                 continue;
 261
 262                         // If this is true, inexistent block will be made from scratch
 263                         bool generate = d <= d_max_gen;
 264
 265                         /*
 266                                 Don't generate or send if not in sight
 267                                 FIXME This only works if the client uses a small enough
 268                                 FOV setting. The default of 72 degrees is fine.
 269                                 Also retrieve a smaller view cone in the direction of the player's
 270                                 movement.
 271                                 (0.1 is about 4 degrees)
 272                         */
 273                         f32 dist;
 274                         if (!(isBlockInSight(p, camera_pos, camera_dir, camera_fov,
 275                                                 d_blocks_in_sight, &dist) ||
 276                                         (playerspeed.getLength() > 1.0f * BS &&
 277                                         isBlockInSight(p, camera_pos, playerspeeddir, 0.1f,
 278                                                 d_blocks_in_sight)))) {
 279                                 continue;
 280                         }
 281
 282                         /*
 283                                 Don't send already sent blocks
 284                         */
 285                         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 286                                 continue;
 287
 288                         /*
 289                                 Check if map has this block
 290                         */
 291                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 292
 293                         bool surely_not_found_on_disk = false;
 294                         bool block_is_invalid = false;
 295                         if (block) {
 296                                 // Reset usage timer, this block will be of use in the future.
 297                                 block->resetUsageTimer();
 298
 299                                 // Block is dummy if data doesn't exist.
 300                                 // It means it has been not found from disk and not generated
 301                                 if (block->isDummy()) {
 302                                         surely_not_found_on_disk = true;
 303                                 }
 304
 305                                 if (!block->isGenerated())
 306                                         block_is_invalid = true;
 307
 308                                 /*
 309                                         If block is not close, don't send it unless it is near
 310                                         ground level.
 311
 312                                         Block is near ground level if night-time mesh
 313                                         differs from day-time mesh.
 314                                 */
 315                                 if (d >= d_opt) {
 316                                         if (!block->getDayNightDiff())
 317                                                 continue;
 318                                 }
 319
 320                                 if (m_occ_cull && !block_is_invalid &&
 321                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 322                                         continue;
 323                                 }
 324                         }
 325
 326                         /*
 327                                 If block has been marked to not exist on disk (dummy)
 328                                 and generating new ones is not wanted, skip block.
 329                         */
 330                         if (!generate && surely_not_found_on_disk) {
 331                                 // get next one.
 332                                 continue;
 333                         }
 334
 335                         /*
 336                                 Add inexistent block to emerge queue.
 337                         */
 338                         if (block == NULL || surely_not_found_on_disk || block_is_invalid) {
 339                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 340                                         if (nearest_emerged_d == -1)
 341                                                 nearest_emerged_d = d;
 342                                 } else {
 343                                         if (nearest_emergefull_d == -1)
 344                                                 nearest_emergefull_d = d;
 345                                         goto queue_full_break;
 346                                 }
 347
 348                                 // get next one.
 349                                 continue;
 350                         }
 351
 352                         if (nearest_sent_d == -1)
 353                                 nearest_sent_d = d;
 354
 355                         /*
 356                                 Add block to send queue
 357                         */
 358                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 359
 360                         dest.push_back(q);
 361
 362                         num_blocks_selected += 1;
 363                 }
 364         }
 365 queue_full_break:
 366
 367         // If nothing was found for sending and nothing was queued for
 368         // emerging, continue next time browsing from here
 369         if (nearest_emerged_d != -1) {
 370                 new_nearest_unsent_d = nearest_emerged_d;
 371         } else if (nearest_emergefull_d != -1) {
 372                 new_nearest_unsent_d = nearest_emergefull_d;
 373         } else {
 374                 if (d > full_d_max) {
 375                         new_nearest_unsent_d = 0;
 376                         m_nothing_to_send_pause_timer = 2.0f;
 377                 } else {
 378                         if (nearest_sent_d != -1)
 379                                 new_nearest_unsent_d = nearest_sent_d;
 380                         else
 381                                 new_nearest_unsent_d = d;
 382                 }
 383         }
 384
 385         if (new_nearest_unsent_d != -1)
 386                 m_nearest_unsent_d = new_nearest_unsent_d;
 387 }
 388
 389 void RemoteClient::GotBlock(v3s16 p)
 390 {
 391         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 392                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 393                         m_blocks_sending.erase(p);
 394                 else
 395                         m_excess_gotblocks++;
 396
 397                 m_blocks_sent.insert(p);
 398         }
 399 }
 400
 401 void RemoteClient::SentBlock(v3s16 p)
 402 {
 403         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 404                 m_blocks_modified.erase(p);
 405
 406         if (m_blocks_sending.find(p) == m_blocks_sending.end())
 407                 m_blocks_sending[p] = 0.0f;
 408         else
 409                 infostream<<"RemoteClient::SentBlock(): Sent block"
 410                                 " already in m_blocks_sending"<<std::endl;
 411 }
 412
 413 void RemoteClient::SetBlockNotSent(v3s16 p)
 414 {
 415         m_nearest_unsent_d = 0;
 416         m_nothing_to_send_pause_timer = 0;
 417
 418         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 419                 m_blocks_sending.erase(p);
 420         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 421                 m_blocks_sent.erase(p);
 422         m_blocks_modified.insert(p);
 423 }
 424
 425 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 426 {
 427         m_nearest_unsent_d = 0;
 428         m_nothing_to_send_pause_timer = 0;
 429
 430         for (auto &block : blocks) {
 431                 v3s16 p = block.first;
 432                 m_blocks_modified.insert(p);
 433
 434                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 435                         m_blocks_sending.erase(p);
 436                 if (m_blocks_sent.find(p) != m_blocks_sent.end())
 437                         m_blocks_sent.erase(p);
 438         }
 439 }
 440
 441 void RemoteClient::notifyEvent(ClientStateEvent event)
 442 {
 443         std::ostringstream myerror;
 444         switch (m_state)
 445         {
 446         case CS_Invalid:
 447                 //intentionally do nothing
 448                 break;
 449         case CS_Created:
 450                 switch (event) {
 451                 case CSE_Hello:
 452                         m_state = CS_HelloSent;
 453                         break;
 454                 case CSE_InitLegacy:
 455                         m_state = CS_AwaitingInit2;
 456                         break;
 457                 case CSE_Disconnect:
 458                         m_state = CS_Disconnecting;
 459                         break;
 460                 case CSE_SetDenied:
 461                         m_state = CS_Denied;
 462                         break;
 463                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 464                 default:
 465                         myerror << "Created: Invalid client state transition! " << event;
 466                         throw ClientStateError(myerror.str());
 467                 }
 468                 break;
 469         case CS_Denied:
 470                 /* don't do anything if in denied state */
 471                 break;
 472         case CS_HelloSent:
 473                 switch(event)
 474                 {
 475                 case CSE_AuthAccept:
 476                         m_state = CS_AwaitingInit2;
 477                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 478                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 479                                 srp_verifier_delete((SRPVerifier *) auth_data);
 480                         chosen_mech = AUTH_MECHANISM_NONE;
 481                         break;
 482                 case CSE_Disconnect:
 483                         m_state = CS_Disconnecting;
 484                         break;
 485                 case CSE_SetDenied:
 486                         m_state = CS_Denied;
 487                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 488                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 489                                 srp_verifier_delete((SRPVerifier *) auth_data);
 490                         chosen_mech = AUTH_MECHANISM_NONE;
 491                         break;
 492                 default:
 493                         myerror << "HelloSent: Invalid client state transition! " << event;
 494                         throw ClientStateError(myerror.str());
 495                 }
 496                 break;
 497         case CS_AwaitingInit2:
 498                 switch(event)
 499                 {
 500                 case CSE_GotInit2:
 501                         confirmSerializationVersion();
 502                         m_state = CS_InitDone;
 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 SetDefinitionsSent SetMediaSent */
 512                 default:
 513                         myerror << "InitSent: Invalid client state transition! " << event;
 514                         throw ClientStateError(myerror.str());
 515                 }
 516                 break;
 517
 518         case CS_InitDone:
 519                 switch(event)
 520                 {
 521                 case CSE_SetDefinitionsSent:
 522                         m_state = CS_DefinitionsSent;
 523                         break;
 524                 case CSE_Disconnect:
 525                         m_state = CS_Disconnecting;
 526                         break;
 527                 case CSE_SetDenied:
 528                         m_state = CS_Denied;
 529                         break;
 530
 531                 /* Init GotInit2 SetMediaSent */
 532                 default:
 533                         myerror << "InitDone: Invalid client state transition! " << event;
 534                         throw ClientStateError(myerror.str());
 535                 }
 536                 break;
 537         case CS_DefinitionsSent:
 538                 switch(event)
 539                 {
 540                 case CSE_SetClientReady:
 541                         m_state = CS_Active;
 542                         break;
 543                 case CSE_Disconnect:
 544                         m_state = CS_Disconnecting;
 545                         break;
 546                 case CSE_SetDenied:
 547                         m_state = CS_Denied;
 548                         break;
 549                 /* Init GotInit2 SetDefinitionsSent */
 550                 default:
 551                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 552                         throw ClientStateError(myerror.str());
 553                 }
 554                 break;
 555         case CS_Active:
 556                 switch(event)
 557                 {
 558                 case CSE_SetDenied:
 559                         m_state = CS_Denied;
 560                         break;
 561                 case CSE_Disconnect:
 562                         m_state = CS_Disconnecting;
 563                         break;
 564                 case CSE_SudoSuccess:
 565                         m_state = CS_SudoMode;
 566                         if (chosen_mech == AUTH_MECHANISM_SRP)
 567                                 srp_verifier_delete((SRPVerifier *) auth_data);
 568                         chosen_mech = AUTH_MECHANISM_NONE;
 569                         break;
 570                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 571                 default:
 572                         myerror << "Active: Invalid client state transition! " << event;
 573                         throw ClientStateError(myerror.str());
 574                         break;
 575                 }
 576                 break;
 577         case CS_SudoMode:
 578                 switch(event)
 579                 {
 580                 case CSE_SetDenied:
 581                         m_state = CS_Denied;
 582                         break;
 583                 case CSE_Disconnect:
 584                         m_state = CS_Disconnecting;
 585                         break;
 586                 case CSE_SudoLeave:
 587                         m_state = CS_Active;
 588                         break;
 589                 default:
 590                         myerror << "Active: Invalid client state transition! " << event;
 591                         throw ClientStateError(myerror.str());
 592                         break;
 593                 }
 594                 break;
 595         case CS_Disconnecting:
 596                 /* we are already disconnecting */
 597                 break;
 598         }
 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                 MutexAutoLock 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         MutexAutoLock 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 /**
 643  * Verify if user limit was reached.
 644  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 645  * @return true if user limit was reached
 646  */
 647 bool ClientInterface::isUserLimitReached()
 648 {
 649         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 650 }
 651
 652 void ClientInterface::step(float dtime)
 653 {
 654         m_print_info_timer += dtime;
 655         if (m_print_info_timer >= 30.0f) {
 656                 m_print_info_timer = 0.0f;
 657                 UpdatePlayerList();
 658         }
 659 }
 660
 661 void ClientInterface::UpdatePlayerList()
 662 {
 663         if (m_env) {
 664                 std::vector<session_t> clients = getClientIDs();
 665                 m_clients_names.clear();
 666
 667
 668                 if (!clients.empty())
 669                         infostream<<"Players:"<<std::endl;
 670
 671                 for (session_t i : clients) {
 672                         RemotePlayer *player = m_env->getPlayer(i);
 673
 674                         if (player == NULL)
 675                                 continue;
 676
 677                         infostream << "* " << player->getName() << "\t";
 678
 679                         {
 680                                 MutexAutoLock clientslock(m_clients_mutex);
 681                                 RemoteClient* client = lockedGetClientNoEx(i);
 682                                 if (client)
 683                                         client->PrintInfo(infostream);
 684                         }
 685
 686                         m_clients_names.emplace_back(player->getName());
 687                 }
 688         }
 689 }
 690
 691 void ClientInterface::send(session_t peer_id, u8 channelnum,
 692                 NetworkPacket *pkt, bool reliable)
 693 {
 694         m_con->Send(peer_id, channelnum, pkt, reliable);
 695 }
 696
 697 void ClientInterface::sendToAll(NetworkPacket *pkt)
 698 {
 699         MutexAutoLock clientslock(m_clients_mutex);
 700         for (auto &client_it : m_clients) {
 701                 RemoteClient *client = client_it.second;
 702
 703                 if (client->net_proto_version != 0) {
 704                         m_con->Send(client->peer_id,
 705                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 706                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 707                 }
 708         }
 709 }
 710
 711 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 712                 u16 min_proto_ver)
 713 {
 714         MutexAutoLock clientslock(m_clients_mutex);
 715         for (auto &client_it : m_clients) {
 716                 RemoteClient *client = client_it.second;
 717                 NetworkPacket *pkt_to_send = nullptr;
 718
 719                 if (client->net_proto_version >= min_proto_ver) {
 720                         pkt_to_send = pkt;
 721                 } else if (client->net_proto_version != 0) {
 722                         pkt_to_send = legacypkt;
 723                 } else {
 724                         warningstream << "Client with unhandled version to handle: '"
 725                                 << client->net_proto_version << "'";
 726                         continue;
 727                 }
 728
 729                 m_con->Send(client->peer_id,
 730                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 731                         pkt_to_send,
 732                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 733         }
 734 }
 735
 736 RemoteClient* ClientInterface::getClientNoEx(session_t peer_id, ClientState state_min)
 737 {
 738         MutexAutoLock clientslock(m_clients_mutex);
 739         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 740         // The client may not exist; clients are immediately removed if their
 741         // access is denied, and this event occurs later then.
 742         if (n == m_clients.end())
 743                 return NULL;
 744
 745         if (n->second->getState() >= state_min)
 746                 return n->second;
 747
 748         return NULL;
 749 }
 750
 751 RemoteClient* ClientInterface::lockedGetClientNoEx(session_t peer_id, ClientState state_min)
 752 {
 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 NULL;
 758
 759         if (n->second->getState() >= state_min)
 760                 return n->second;
 761
 762         return NULL;
 763 }
 764
 765 ClientState ClientInterface::getClientState(session_t peer_id)
 766 {
 767         MutexAutoLock clientslock(m_clients_mutex);
 768         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 769         // The client may not exist; clients are immediately removed if their
 770         // access is denied, and this event occurs later then.
 771         if (n == m_clients.end())
 772                 return CS_Invalid;
 773
 774         return n->second->getState();
 775 }
 776
 777 void ClientInterface::setPlayerName(session_t peer_id, const std::string &name)
 778 {
 779         MutexAutoLock clientslock(m_clients_mutex);
 780         RemoteClientMap::iterator n = m_clients.find(peer_id);
 781         // The client may not exist; clients are immediately removed if their
 782         // access is denied, and this event occurs later then.
 783         if (n != m_clients.end())
 784                 n->second->setName(name);
 785 }
 786
 787 void ClientInterface::DeleteClient(session_t peer_id)
 788 {
 789         MutexAutoLock conlock(m_clients_mutex);
 790
 791         // Error check
 792         RemoteClientMap::iterator n = m_clients.find(peer_id);
 793         // The client may not exist; clients are immediately removed if their
 794         // access is denied, and this event occurs later then.
 795         if (n == m_clients.end())
 796                 return;
 797
 798         /*
 799                 Mark objects to be not known by the client
 800         */
 801         //TODO this should be done by client destructor!!!
 802         RemoteClient *client = n->second;
 803         // Handle objects
 804         for (u16 id : client->m_known_objects) {
 805                 // Get object
 806                 ServerActiveObject* obj = m_env->getActiveObject(id);
 807
 808                 if(obj && obj->m_known_by_count > 0)
 809                         obj->m_known_by_count--;
 810         }
 811
 812         // Delete client
 813         delete m_clients[peer_id];
 814         m_clients.erase(peer_id);
 815 }
 816
 817 void ClientInterface::CreateClient(session_t peer_id)
 818 {
 819         MutexAutoLock conlock(m_clients_mutex);
 820
 821         // Error check
 822         RemoteClientMap::iterator n = m_clients.find(peer_id);
 823         // The client shouldn't already exist
 824         if (n != m_clients.end()) return;
 825
 826         // Create client
 827         RemoteClient *client = new RemoteClient();
 828         client->peer_id = peer_id;
 829         m_clients[client->peer_id] = client;
 830 }
 831
 832 void ClientInterface::event(session_t peer_id, ClientStateEvent event)
 833 {
 834         {
 835                 MutexAutoLock clientlock(m_clients_mutex);
 836
 837                 // Error check
 838                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 839
 840                 // No client to deliver event
 841                 if (n == m_clients.end())
 842                         return;
 843                 n->second->notifyEvent(event);
 844         }
 845
 846         if ((event == CSE_SetClientReady) ||
 847                 (event == CSE_Disconnect)     ||
 848                 (event == CSE_SetDenied))
 849         {
 850                 UpdatePlayerList();
 851         }
 852 }
 853
 854 u16 ClientInterface::getProtocolVersion(session_t peer_id)
 855 {
 856         MutexAutoLock conlock(m_clients_mutex);
 857
 858         // Error check
 859         RemoteClientMap::iterator n = m_clients.find(peer_id);
 860
 861         // No client to get version
 862         if (n == m_clients.end())
 863                 return 0;
 864
 865         return n->second->net_proto_version;
 866 }
 867
 868 void ClientInterface::setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
 869                 const std::string &full)
 870 {
 871         MutexAutoLock conlock(m_clients_mutex);
 872
 873         // Error check
 874         RemoteClientMap::iterator n = m_clients.find(peer_id);
 875
 876         // No client to set versions
 877         if (n == m_clients.end())
 878                 return;
 879
 880         n->second->setVersionInfo(major, minor, patch, full);
 881 }