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         // cos(angle between velocity and camera) * |velocity|
 200         // Limit to 0.0f in case player moves backwards.
 201         f32 dot = rangelim(camera_dir.dotProduct(playerspeed), 0.0f, 300.0f);
 202
 203         // Reduce the field of view when a player moves and looks forward.
 204         // limit max fov effect to 50%, 60% at 20n/s fly speed
 205         camera_fov = camera_fov / (1 + dot / 300.0f);
 206
 207         const s16 full_d_max = std::min(m_max_send_distance, wanted_range);
 208         const s16 d_opt = std::min(m_block_optimize_distance, wanted_range);
 209         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 210         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 211
 212         s16 d_max = full_d_max;
 213         s16 d_max_gen = std::min(m_max_gen_distance, wanted_range);
 214
 215         // Don't loop very much at a time
 216         s16 max_d_increment_at_time = 2;
 217         if (d_max > d_start + max_d_increment_at_time)
 218                 d_max = d_start + max_d_increment_at_time;
 219
 220         s32 nearest_emerged_d = -1;
 221         s32 nearest_emergefull_d = -1;
 222         s32 nearest_sent_d = -1;
 223         //bool queue_is_full = false;
 224
 225         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 226
 227         s16 d;
 228         for (d = d_start; d <= d_max; d++) {
 229                 /*
 230                         Get the border/face dot coordinates of a "d-radiused"
 231                         box
 232                 */
 233                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 234
 235                 std::vector<v3s16>::iterator li;
 236                 for (li = list.begin(); li != list.end(); ++li) {
 237                         v3s16 p = *li + center;
 238
 239                         /*
 240                                 Send throttling
 241                                 - Don't allow too many simultaneous transfers
 242                                 - EXCEPT when the blocks are very close
 243
 244                                 Also, don't send blocks that are already flying.
 245                         */
 246
 247                         // Start with the usual maximum
 248                         u16 max_simul_dynamic = max_simul_sends_usually;
 249
 250                         // If block is very close, allow full maximum
 251                         if (d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 252                                 max_simul_dynamic = m_max_simul_sends;
 253
 254                         // Don't select too many blocks for sending
 255                         if (num_blocks_selected >= max_simul_dynamic) {
 256                                 //queue_is_full = true;
 257                                 goto queue_full_break;
 258                         }
 259
 260                         // Don't send blocks that are currently being transferred
 261                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 262                                 continue;
 263
 264                         /*
 265                                 Do not go over max mapgen limit
 266                         */
 267                         if (blockpos_over_max_limit(p))
 268                                 continue;
 269
 270                         // If this is true, inexistent block will be made from scratch
 271                         bool generate = d <= d_max_gen;
 272
 273                         /*
 274                                 Don't generate or send if not in sight
 275                                 FIXME This only works if the client uses a small enough
 276                                 FOV setting. The default of 72 degrees is fine.
 277                                 Also retrieve a smaller view cone in the direction of the player's
 278                                 movement.
 279                                 (0.1 is about 4 degrees)
 280                         */
 281                         f32 dist;
 282                         if (!(isBlockInSight(p, camera_pos, camera_dir, camera_fov,
 283                                                 d_blocks_in_sight, &dist) ||
 284                                         (playerspeed.getLength() > 1.0f * BS &&
 285                                         isBlockInSight(p, camera_pos, playerspeeddir, 0.1f,
 286                                                 d_blocks_in_sight)))) {
 287                                 continue;
 288                         }
 289
 290                         /*
 291                                 Don't send already sent blocks
 292                         */
 293                         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 294                                 continue;
 295
 296                         /*
 297                                 Check if map has this block
 298                         */
 299                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 300
 301                         bool surely_not_found_on_disk = false;
 302                         bool block_is_invalid = false;
 303                         if (block) {
 304                                 // Reset usage timer, this block will be of use in the future.
 305                                 block->resetUsageTimer();
 306
 307                                 // Block is dummy if data doesn't exist.
 308                                 // It means it has been not found from disk and not generated
 309                                 if (block->isDummy()) {
 310                                         surely_not_found_on_disk = true;
 311                                 }
 312
 313                                 if (!block->isGenerated())
 314                                         block_is_invalid = true;
 315
 316                                 /*
 317                                         If block is not close, don't send it unless it is near
 318                                         ground level.
 319
 320                                         Block is near ground level if night-time mesh
 321                                         differs from day-time mesh.
 322                                 */
 323                                 if (d >= d_opt) {
 324                                         if (!block->getDayNightDiff())
 325                                                 continue;
 326                                 }
 327
 328                                 if (m_occ_cull && !block_is_invalid &&
 329                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 330                                         continue;
 331                                 }
 332                         }
 333
 334                         /*
 335                                 If block has been marked to not exist on disk (dummy)
 336                                 and generating new ones is not wanted, skip block.
 337                         */
 338                         if (!generate && surely_not_found_on_disk) {
 339                                 // get next one.
 340                                 continue;
 341                         }
 342
 343                         /*
 344                                 Add inexistent block to emerge queue.
 345                         */
 346                         if (block == NULL || surely_not_found_on_disk || block_is_invalid) {
 347                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 348                                         if (nearest_emerged_d == -1)
 349                                                 nearest_emerged_d = d;
 350                                 } else {
 351                                         if (nearest_emergefull_d == -1)
 352                                                 nearest_emergefull_d = d;
 353                                         goto queue_full_break;
 354                                 }
 355
 356                                 // get next one.
 357                                 continue;
 358                         }
 359
 360                         if (nearest_sent_d == -1)
 361                                 nearest_sent_d = d;
 362
 363                         /*
 364                                 Add block to send queue
 365                         */
 366                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 367
 368                         dest.push_back(q);
 369
 370                         num_blocks_selected += 1;
 371                 }
 372         }
 373 queue_full_break:
 374
 375         // If nothing was found for sending and nothing was queued for
 376         // emerging, continue next time browsing from here
 377         if (nearest_emerged_d != -1) {
 378                 new_nearest_unsent_d = nearest_emerged_d;
 379         } else if (nearest_emergefull_d != -1) {
 380                 new_nearest_unsent_d = nearest_emergefull_d;
 381         } else {
 382                 if (d > full_d_max) {
 383                         new_nearest_unsent_d = 0;
 384                         m_nothing_to_send_pause_timer = 2.0f;
 385                 } else {
 386                         if (nearest_sent_d != -1)
 387                                 new_nearest_unsent_d = nearest_sent_d;
 388                         else
 389                                 new_nearest_unsent_d = d;
 390                 }
 391         }
 392
 393         if (new_nearest_unsent_d != -1)
 394                 m_nearest_unsent_d = new_nearest_unsent_d;
 395 }
 396
 397 void RemoteClient::GotBlock(v3s16 p)
 398 {
 399         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 400                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 401                         m_blocks_sending.erase(p);
 402                 else
 403                         m_excess_gotblocks++;
 404
 405                 m_blocks_sent.insert(p);
 406         }
 407 }
 408
 409 void RemoteClient::SentBlock(v3s16 p)
 410 {
 411         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 412                 m_blocks_modified.erase(p);
 413
 414         if (m_blocks_sending.find(p) == m_blocks_sending.end())
 415                 m_blocks_sending[p] = 0.0f;
 416         else
 417                 infostream<<"RemoteClient::SentBlock(): Sent block"
 418                                 " already in m_blocks_sending"<<std::endl;
 419 }
 420
 421 void RemoteClient::SetBlockNotSent(v3s16 p)
 422 {
 423         m_nearest_unsent_d = 0;
 424         m_nothing_to_send_pause_timer = 0;
 425
 426         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 427                 m_blocks_sending.erase(p);
 428         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 429                 m_blocks_sent.erase(p);
 430         m_blocks_modified.insert(p);
 431 }
 432
 433 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 434 {
 435         m_nearest_unsent_d = 0;
 436         m_nothing_to_send_pause_timer = 0;
 437
 438         for (auto &block : blocks) {
 439                 v3s16 p = block.first;
 440                 m_blocks_modified.insert(p);
 441
 442                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 443                         m_blocks_sending.erase(p);
 444                 if (m_blocks_sent.find(p) != m_blocks_sent.end())
 445                         m_blocks_sent.erase(p);
 446         }
 447 }
 448
 449 void RemoteClient::notifyEvent(ClientStateEvent event)
 450 {
 451         std::ostringstream myerror;
 452         switch (m_state)
 453         {
 454         case CS_Invalid:
 455                 //intentionally do nothing
 456                 break;
 457         case CS_Created:
 458                 switch (event) {
 459                 case CSE_Hello:
 460                         m_state = CS_HelloSent;
 461                         break;
 462                 case CSE_InitLegacy:
 463                         m_state = CS_AwaitingInit2;
 464                         break;
 465                 case CSE_Disconnect:
 466                         m_state = CS_Disconnecting;
 467                         break;
 468                 case CSE_SetDenied:
 469                         m_state = CS_Denied;
 470                         break;
 471                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 472                 default:
 473                         myerror << "Created: Invalid client state transition! " << event;
 474                         throw ClientStateError(myerror.str());
 475                 }
 476                 break;
 477         case CS_Denied:
 478                 /* don't do anything if in denied state */
 479                 break;
 480         case CS_HelloSent:
 481                 switch(event)
 482                 {
 483                 case CSE_AuthAccept:
 484                         m_state = CS_AwaitingInit2;
 485                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 486                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 487                                 srp_verifier_delete((SRPVerifier *) auth_data);
 488                         chosen_mech = AUTH_MECHANISM_NONE;
 489                         break;
 490                 case CSE_Disconnect:
 491                         m_state = CS_Disconnecting;
 492                         break;
 493                 case CSE_SetDenied:
 494                         m_state = CS_Denied;
 495                         if (chosen_mech == AUTH_MECHANISM_SRP ||
 496                                         chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD)
 497                                 srp_verifier_delete((SRPVerifier *) auth_data);
 498                         chosen_mech = AUTH_MECHANISM_NONE;
 499                         break;
 500                 default:
 501                         myerror << "HelloSent: Invalid client state transition! " << event;
 502                         throw ClientStateError(myerror.str());
 503                 }
 504                 break;
 505         case CS_AwaitingInit2:
 506                 switch(event)
 507                 {
 508                 case CSE_GotInit2:
 509                         confirmSerializationVersion();
 510                         m_state = CS_InitDone;
 511                         break;
 512                 case CSE_Disconnect:
 513                         m_state = CS_Disconnecting;
 514                         break;
 515                 case CSE_SetDenied:
 516                         m_state = CS_Denied;
 517                         break;
 518
 519                 /* Init SetDefinitionsSent SetMediaSent */
 520                 default:
 521                         myerror << "InitSent: Invalid client state transition! " << event;
 522                         throw ClientStateError(myerror.str());
 523                 }
 524                 break;
 525
 526         case CS_InitDone:
 527                 switch(event)
 528                 {
 529                 case CSE_SetDefinitionsSent:
 530                         m_state = CS_DefinitionsSent;
 531                         break;
 532                 case CSE_Disconnect:
 533                         m_state = CS_Disconnecting;
 534                         break;
 535                 case CSE_SetDenied:
 536                         m_state = CS_Denied;
 537                         break;
 538
 539                 /* Init GotInit2 SetMediaSent */
 540                 default:
 541                         myerror << "InitDone: Invalid client state transition! " << event;
 542                         throw ClientStateError(myerror.str());
 543                 }
 544                 break;
 545         case CS_DefinitionsSent:
 546                 switch(event)
 547                 {
 548                 case CSE_SetClientReady:
 549                         m_state = CS_Active;
 550                         break;
 551                 case CSE_Disconnect:
 552                         m_state = CS_Disconnecting;
 553                         break;
 554                 case CSE_SetDenied:
 555                         m_state = CS_Denied;
 556                         break;
 557                 /* Init GotInit2 SetDefinitionsSent */
 558                 default:
 559                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 560                         throw ClientStateError(myerror.str());
 561                 }
 562                 break;
 563         case CS_Active:
 564                 switch(event)
 565                 {
 566                 case CSE_SetDenied:
 567                         m_state = CS_Denied;
 568                         break;
 569                 case CSE_Disconnect:
 570                         m_state = CS_Disconnecting;
 571                         break;
 572                 case CSE_SudoSuccess:
 573                         m_state = CS_SudoMode;
 574                         if (chosen_mech == AUTH_MECHANISM_SRP)
 575                                 srp_verifier_delete((SRPVerifier *) auth_data);
 576                         chosen_mech = AUTH_MECHANISM_NONE;
 577                         break;
 578                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 579                 default:
 580                         myerror << "Active: Invalid client state transition! " << event;
 581                         throw ClientStateError(myerror.str());
 582                         break;
 583                 }
 584                 break;
 585         case CS_SudoMode:
 586                 switch(event)
 587                 {
 588                 case CSE_SetDenied:
 589                         m_state = CS_Denied;
 590                         break;
 591                 case CSE_Disconnect:
 592                         m_state = CS_Disconnecting;
 593                         break;
 594                 case CSE_SudoLeave:
 595                         m_state = CS_Active;
 596                         break;
 597                 default:
 598                         myerror << "Active: Invalid client state transition! " << event;
 599                         throw ClientStateError(myerror.str());
 600                         break;
 601                 }
 602                 break;
 603         case CS_Disconnecting:
 604                 /* we are already disconnecting */
 605                 break;
 606         }
 607 }
 608
 609 u64 RemoteClient::uptime() const
 610 {
 611         return porting::getTimeS() - m_connection_time;
 612 }
 613
 614 ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
 615 :
 616         m_con(con),
 617         m_env(NULL),
 618         m_print_info_timer(0.0f)
 619 {
 620
 621 }
 622 ClientInterface::~ClientInterface()
 623 {
 624         /*
 625                 Delete clients
 626         */
 627         {
 628                 MutexAutoLock clientslock(m_clients_mutex);
 629
 630                 for (auto &client_it : m_clients) {
 631                         // Delete client
 632                         delete client_it.second;
 633                 }
 634         }
 635 }
 636
 637 std::vector<session_t> ClientInterface::getClientIDs(ClientState min_state)
 638 {
 639         std::vector<session_t> reply;
 640         MutexAutoLock clientslock(m_clients_mutex);
 641
 642         for (const auto &m_client : m_clients) {
 643                 if (m_client.second->getState() >= min_state)
 644                         reply.push_back(m_client.second->peer_id);
 645         }
 646
 647         return reply;
 648 }
 649
 650 /**
 651  * Verify if user limit was reached.
 652  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 653  * @return true if user limit was reached
 654  */
 655 bool ClientInterface::isUserLimitReached()
 656 {
 657         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 658 }
 659
 660 void ClientInterface::step(float dtime)
 661 {
 662         m_print_info_timer += dtime;
 663         if (m_print_info_timer >= 30.0f) {
 664                 m_print_info_timer = 0.0f;
 665                 UpdatePlayerList();
 666         }
 667 }
 668
 669 void ClientInterface::UpdatePlayerList()
 670 {
 671         if (m_env) {
 672                 std::vector<session_t> clients = getClientIDs();
 673                 m_clients_names.clear();
 674
 675
 676                 if (!clients.empty())
 677                         infostream<<"Players:"<<std::endl;
 678
 679                 for (session_t i : clients) {
 680                         RemotePlayer *player = m_env->getPlayer(i);
 681
 682                         if (player == NULL)
 683                                 continue;
 684
 685                         infostream << "* " << player->getName() << "\t";
 686
 687                         {
 688                                 MutexAutoLock clientslock(m_clients_mutex);
 689                                 RemoteClient* client = lockedGetClientNoEx(i);
 690                                 if (client)
 691                                         client->PrintInfo(infostream);
 692                         }
 693
 694                         m_clients_names.emplace_back(player->getName());
 695                 }
 696         }
 697 }
 698
 699 void ClientInterface::send(session_t peer_id, u8 channelnum,
 700                 NetworkPacket *pkt, bool reliable)
 701 {
 702         m_con->Send(peer_id, channelnum, pkt, reliable);
 703 }
 704
 705 void ClientInterface::sendToAll(NetworkPacket *pkt)
 706 {
 707         MutexAutoLock clientslock(m_clients_mutex);
 708         for (auto &client_it : m_clients) {
 709                 RemoteClient *client = client_it.second;
 710
 711                 if (client->net_proto_version != 0) {
 712                         m_con->Send(client->peer_id,
 713                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 714                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 715                 }
 716         }
 717 }
 718
 719 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 720                 u16 min_proto_ver)
 721 {
 722         MutexAutoLock clientslock(m_clients_mutex);
 723         for (auto &client_it : m_clients) {
 724                 RemoteClient *client = client_it.second;
 725                 NetworkPacket *pkt_to_send = nullptr;
 726
 727                 if (client->net_proto_version >= min_proto_ver) {
 728                         pkt_to_send = pkt;
 729                 } else if (client->net_proto_version != 0) {
 730                         pkt_to_send = legacypkt;
 731                 } else {
 732                         warningstream << "Client with unhandled version to handle: '"
 733                                 << client->net_proto_version << "'";
 734                         continue;
 735                 }
 736
 737                 m_con->Send(client->peer_id,
 738                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 739                         pkt_to_send,
 740                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 741         }
 742 }
 743
 744 RemoteClient* ClientInterface::getClientNoEx(session_t peer_id, ClientState state_min)
 745 {
 746         MutexAutoLock clientslock(m_clients_mutex);
 747         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 748         // The client may not exist; clients are immediately removed if their
 749         // access is denied, and this event occurs later then.
 750         if (n == m_clients.end())
 751                 return NULL;
 752
 753         if (n->second->getState() >= state_min)
 754                 return n->second;
 755
 756         return NULL;
 757 }
 758
 759 RemoteClient* ClientInterface::lockedGetClientNoEx(session_t peer_id, ClientState state_min)
 760 {
 761         RemoteClientMap::const_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                 return NULL;
 766
 767         if (n->second->getState() >= state_min)
 768                 return n->second;
 769
 770         return NULL;
 771 }
 772
 773 ClientState ClientInterface::getClientState(session_t peer_id)
 774 {
 775         MutexAutoLock clientslock(m_clients_mutex);
 776         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 777         // The client may not exist; clients are immediately removed if their
 778         // access is denied, and this event occurs later then.
 779         if (n == m_clients.end())
 780                 return CS_Invalid;
 781
 782         return n->second->getState();
 783 }
 784
 785 void ClientInterface::setPlayerName(session_t peer_id, const std::string &name)
 786 {
 787         MutexAutoLock clientslock(m_clients_mutex);
 788         RemoteClientMap::iterator n = m_clients.find(peer_id);
 789         // The client may not exist; clients are immediately removed if their
 790         // access is denied, and this event occurs later then.
 791         if (n != m_clients.end())
 792                 n->second->setName(name);
 793 }
 794
 795 void ClientInterface::DeleteClient(session_t peer_id)
 796 {
 797         MutexAutoLock conlock(m_clients_mutex);
 798
 799         // Error check
 800         RemoteClientMap::iterator n = m_clients.find(peer_id);
 801         // The client may not exist; clients are immediately removed if their
 802         // access is denied, and this event occurs later then.
 803         if (n == m_clients.end())
 804                 return;
 805
 806         /*
 807                 Mark objects to be not known by the client
 808         */
 809         //TODO this should be done by client destructor!!!
 810         RemoteClient *client = n->second;
 811         // Handle objects
 812         for (u16 id : client->m_known_objects) {
 813                 // Get object
 814                 ServerActiveObject* obj = m_env->getActiveObject(id);
 815
 816                 if(obj && obj->m_known_by_count > 0)
 817                         obj->m_known_by_count--;
 818         }
 819
 820         // Delete client
 821         delete m_clients[peer_id];
 822         m_clients.erase(peer_id);
 823 }
 824
 825 void ClientInterface::CreateClient(session_t peer_id)
 826 {
 827         MutexAutoLock conlock(m_clients_mutex);
 828
 829         // Error check
 830         RemoteClientMap::iterator n = m_clients.find(peer_id);
 831         // The client shouldn't already exist
 832         if (n != m_clients.end()) return;
 833
 834         // Create client
 835         RemoteClient *client = new RemoteClient();
 836         client->peer_id = peer_id;
 837         m_clients[client->peer_id] = client;
 838 }
 839
 840 void ClientInterface::event(session_t peer_id, ClientStateEvent event)
 841 {
 842         {
 843                 MutexAutoLock clientlock(m_clients_mutex);
 844
 845                 // Error check
 846                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 847
 848                 // No client to deliver event
 849                 if (n == m_clients.end())
 850                         return;
 851                 n->second->notifyEvent(event);
 852         }
 853
 854         if ((event == CSE_SetClientReady) ||
 855                 (event == CSE_Disconnect)     ||
 856                 (event == CSE_SetDenied))
 857         {
 858                 UpdatePlayerList();
 859         }
 860 }
 861
 862 u16 ClientInterface::getProtocolVersion(session_t peer_id)
 863 {
 864         MutexAutoLock conlock(m_clients_mutex);
 865
 866         // Error check
 867         RemoteClientMap::iterator n = m_clients.find(peer_id);
 868
 869         // No client to get version
 870         if (n == m_clients.end())
 871                 return 0;
 872
 873         return n->second->net_proto_version;
 874 }
 875
 876 void ClientInterface::setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
 877                 const std::string &full)
 878 {
 879         MutexAutoLock conlock(m_clients_mutex);
 880
 881         // Error check
 882         RemoteClientMap::iterator n = m_clients.find(peer_id);
 883
 884         // No client to set versions
 885         if (n == m_clients.end())
 886                 return;
 887
 888         n->second->setVersionInfo(major, minor, patch, full);
 889 }