src/#clientiface.cpp#

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include <sstream>
  21 #include "clientiface.h"
  22 #include "network/connection.h"
  23 #include "network/serveropcodes.h"
  24 #include "remoteplayer.h"
  25 #include "settings.h"
  26 #include "mapblock.h"
  27 #include "serverenvironment.h"
  28 #include "map.h"
  29 #include "emerge.h"
  30 #include "server/luaentity_sao.h"
  31 #include "server/player_sao.h"
  32 #include "log.h"
  33 #include "util/srp.h"
  34 #include "face_position_cache.h"
  35
  36 const char *ClientInterface::statenames[] = {
  37         "Invalid",
  38         "Disconnecting",
  39         "Denied",
  40         "Created",
  41         "AwaitingInit2",
  42         "HelloSent",
  43         "InitDone",
  44         "DefinitionsSent",
  45         "Active",
  46         "SudoMode",
  47 };
  48
  49
  50
  51 std::string ClientInterface::state2Name(ClientState state)
  52 {
  53         return statenames[state];
  54 }
  55
  56 RemoteClient::RemoteClient() :
  57         m_max_simul_sends(g_settings->getU16("max_simultaneous_block_sends_per_client")),
  58         m_min_time_from_building(
  59                 g_settings->getFloat("full_block_send_enable_min_time_from_building")),
  60         m_max_send_distance(g_settings->getS16("max_block_send_distance")),
  61         m_block_optimize_distance(g_settings->getS16("block_send_optimize_distance")),
  62         m_max_gen_distance(g_settings->getS16("max_block_generate_distance")),
  63         m_occ_cull(g_settings->getBool("server_side_occlusion_culling"))
  64 {
  65 }
  66
  67 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  68 {
  69         // if this block is on wire, mark it for sending again as soon as possible
  70         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  71                 SetBlockNotSent(p);
  72         }
  73 }
  74
  75 LuaEntitySAO *getAttachedObject(PlayerSAO *sao, ServerEnvironment *env)
  76 {
  77         if (!sao->isAttached())
  78                 return nullptr;
  79
  80         int id;
  81         std::string bone;
  82         v3f dummy;
  83         bool force_visible;
  84         sao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
  85         ServerActiveObject *ao = env->getActiveObject(id);
  86         while (id && ao) {
  87                 ao->getAttachment(&id, &bone, &dummy, &dummy, &force_visible);
  88                 if (id)
  89                         ao = env->getActiveObject(id);
  90         }
  91         return dynamic_cast<LuaEntitySAO *>(ao);
  92 }
  93
  94 void RemoteClient::GetNextBlocks (
  95                 ServerEnvironment *env,
  96                 EmergeManager * emerge,
  97                 float dtime,
  98                 std::vector<PrioritySortedBlockTransfer> &dest)
  99 {
 100         // Increment timers
 101         m_nothing_to_send_pause_timer -= dtime;
 102         m_map_send_completion_timer += dtime;
 103
 104         if (m_nothing_to_send_pause_timer >= 0)
 105                 return;
 106
 107         RemotePlayer *player = env->getPlayer(peer_id);
 108         // This can happen sometimes; clients and players are not in perfect sync.
 109         if (!player)
 110                 return;
 111
 112         PlayerSAO *sao = player->getPlayerSAO();
 113         if (!sao)
 114                 return;
 115
 116         // Won't send anything if already sending
 117         if (m_blocks_sending.size() >= m_max_simul_sends) {
 118                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
 119                 return;
 120         }
 121
 122         v3f playerpos = sao->getBasePosition();
 123         // if the player is attached, get the velocity from the attached object
 124         LuaEntitySAO *lsao = getAttachedObject(sao, env);
 125         const v3f &playerspeed = lsao? lsao->getVelocity() : player->getSpeed();
 126         v3f playerspeeddir(0,0,0);
 127         if (playerspeed.getLength() > 1.0f * BS)
 128                 playerspeeddir = playerspeed / playerspeed.getLength();
 129         // Predict to next block
 130         v3f playerpos_predicted = playerpos + playerspeeddir * (MAP_BLOCKSIZE * BS);
 131
 132         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 133
 134         v3s16 center = getNodeBlockPos(center_nodepos);
 135
 136         // Camera position and direction
 137         v3f camera_pos = sao->getEyePosition();
 138         v3f camera_dir = v3f(0,0,1);
 139         camera_dir.rotateYZBy(sao->getLookPitch());
 140         camera_dir.rotateXZBy(sao->getRotation().Y);
 141
 142         u16 max_simul_sends_usually = m_max_simul_sends;
 143
 144         /*
 145                 Check the time from last addNode/removeNode.
 146
 147                 Decrease send rate if player is building stuff.
 148         */
 149         m_time_from_building += dtime;
 150         if (m_time_from_building < m_min_time_from_building) {
 151                 max_simul_sends_usually
 152                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 153         }
 154
 155         /*
 156                 Number of blocks sending + number of blocks selected for sending
 157         */
 158         u32 num_blocks_selected = m_blocks_sending.size();
 159
 160         /*
 161                 next time d will be continued from the d from which the nearest
 162                 unsent block was found this time.
 163
 164                 This is because not necessarily any of the blocks found this
 165                 time are actually sent.
 166         */
 167         s32 new_nearest_unsent_d = -1;
 168
 169         // Get view range and camera fov (radians) from the client
 170         s16 wanted_range = sao->getWantedRange() + 1;
 171         float camera_fov = sao->getFov();
 172
 173         /*
 174                 Get the starting value of the block finder radius.
 175         */
 176         if (m_last_center != center) {
 177                 m_nearest_unsent_d = 0;
 178                 m_last_center = center;
 179         }
 180         // reset the unsent distance if the view angle has changed more that 10% of the fov
 181         // (this matches isBlockInSight which allows for an extra 10%)
 182         if (camera_dir.dotProduct(m_last_camera_dir) < std::cos(camera_fov * 0.1f)) {
 183                 m_nearest_unsent_d = 0;
 184                 m_last_camera_dir = camera_dir;
 185         }
 186         if (m_nearest_unsent_d > 0) {
 187                 // make sure any blocks modified since the last time we sent blocks are resent
 188                 for (const v3s16 &p : m_blocks_modified) {
 189                         m_nearest_unsent_d = std::min(m_nearest_unsent_d, center.getDistanceFrom(p));
 190                 }
 191         }
 192         m_blocks_modified.clear();
 193
 194         s16 d_start = m_nearest_unsent_d;
 195
 196         // Distrust client-sent FOV and get server-set player object property
 197         // zoom FOV (degrees) as a check to avoid hacked clients using FOV to load
 198         // distant world.
 199         // (zoom is disabled by value 0)
 200         float prop_zoom_fov = sao->getZoomFOV() < 0.001f ?
 201                 0.0f :
 202                 std::max(camera_fov, sao->getZoomFOV() * core::DEGTORAD);
 203
 204         const s16 full_d_max = std::min(adjustDist(m_max_send_distance, prop_zoom_fov),
 205                 wanted_range);
 206         const s16 d_opt = std::min(adjustDist(m_block_optimize_distance, prop_zoom_fov),
 207                 wanted_range);
 208         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 209
 210         s16 d_max_gen = std::min(adjustDist(m_max_gen_distance, prop_zoom_fov),
 211                 wanted_range);
 212
 213         s16 d_max = full_d_max;
 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         // cos(angle between velocity and camera) * |velocity|
 221         // Limit to 0.0f in case player moves backwards.
 222         f32 dot = rangelim(camera_dir.dotProduct(playerspeed), 0.0f, 300.0f);
 223
 224         // Reduce the field of view when a player moves and looks forward.
 225         // limit max fov effect to 50%, 60% at 20n/s fly speed
 226         camera_fov = camera_fov / (1 + dot / 300.0f);
 227
 228         s32 nearest_emerged_d = -1;
 229         s32 nearest_emergefull_d = -1;
 230         s32 nearest_sent_d = -1;
 231         //bool queue_is_full = false;
 232
 233         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 234
 235         s16 d;
 236         for (d = d_start; d <= d_max; d++) {
 237                 /*
 238                         Get the border/face dot coordinates of a "d-radiused"
 239                         box
 240                 */
 241                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 242
 243                 std::vector<v3s16>::iterator li;
 244                 for (li = list.begin(); li != list.end(); ++li) {
 245                         v3s16 p = *li + center;
 246
 247                         /*
 248                                 Send throttling
 249                                 - Don't allow too many simultaneous transfers
 250                                 - EXCEPT when the blocks are very close
 251
 252                                 Also, don't send blocks that are already flying.
 253                         */
 254
 255                         // Start with the usual maximum
 256                         u16 max_simul_dynamic = max_simul_sends_usually;
 257
 258                         // If block is very close, allow full maximum
 259                         if (d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 260                                 max_simul_dynamic = m_max_simul_sends;
 261
 262                         // Don't select too many blocks for sending
 263                         if (num_blocks_selected >= max_simul_dynamic) {
 264                                 //queue_is_full = true;
 265                                 goto queue_full_break;
 266                         }
 267
 268                         // Don't send blocks that are currently being transferred
 269                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 270                                 continue;
 271
 272                         /*
 273                                 Do not go over max mapgen limit
 274                         */
 275                         if (blockpos_over_max_limit(p))
 276                                 continue;
 277
 278                         // If this is true, inexistent block will be made from scratch
 279                         bool generate = d <= d_max_gen;
 280
 281                         /*
 282                                 Don't generate or send if not in sight
 283                                 FIXME This only works if the client uses a small enough
 284                                 FOV setting. The default of 72 degrees is fine.
 285                                 Also retrieve a smaller view cone in the direction of the player's
 286                                 movement.
 287                                 (0.1 is about 4 degrees)
 288                         */
 289                         f32 dist;
 290                         if (!(isBlockInSight(p, camera_pos, camera_dir, camera_fov,
 291                                                 d_blocks_in_sight, &dist) ||
 292                                         (playerspeed.getLength() > 1.0f * BS &&
 293                                         isBlockInSight(p, camera_pos, playerspeeddir, 0.1f,
 294                                                 d_blocks_in_sight)))) {
 295                                 continue;
 296                         }
 297
 298                         /*
 299                                 Check if map has this block
 300                         */
 301                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 302                         if (block) {
 303                                 // First: Reset usage timer, this block will be of use in the future.
 304                                 block->resetUsageTimer();
 305                         }
 306
 307                         /*
 308                                 Don't send already sent blocks
 309                         */
 310                         if (m_blocks_sent.find(p) != m_blocks_sent.end())
 311                                 continue;
 312
 313                         bool block_not_found = false;
 314                         if (block) {
 315                                 // Check whether the block exists (with data)
 316                                 if (!block->isGenerated())
 317                                         block_not_found = true;
 318
 319                                 /*
 320                                         If block is not close, don't send it unless it is near
 321                                         ground level.
 322
 323                                         Block is near ground level if night-time mesh
 324                                         differs from day-time mesh.
 325                                 */
 326                                 if (d >= d_opt) {
 327                                         if (!block->getIsUnderground() && !block->getDayNightDiff())
 328                                                 continue;
 329                                 }
 330
 331                                 if (m_occ_cull && !block_not_found &&
 332                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 333                                         continue;
 334                                 }
 335                         }
 336
 337                         /*
 338                                 If block has been marked to not exist on disk (dummy) or is
 339                                 not generated and generating new ones is not wanted, skip block.
 340                         */
 341                         if (!generate && block_not_found) {
 342                                 // get next one.
 343                                 continue;
 344                         }
 345
 346                         /*
 347                                 Add inexistent block to emerge queue.
 348                         */
 349                         if (block == NULL || block_not_found) {
 350                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 351                                         if (nearest_emerged_d == -1)
 352                                                 nearest_emerged_d = d;
 353                                 } else {
 354                                         if (nearest_emergefull_d == -1)
 355                                                 nearest_emergefull_d = d;
 356                                         goto queue_full_break;
 357                                 }
 358
 359                                 // get next one.
 360                                 continue;
 361                         }
 362
 363                         if (nearest_sent_d == -1)
 364                                 nearest_sent_d = d;
 365
 366                         /*
 367                                 Add block to send queue
 368                         */
 369                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 370
 371                         dest.push_back(q);
 372
 373                         num_blocks_selected += 1;
 374                 }
 375         }
 376 queue_full_break:
 377
 378         // If nothing was found for sending and nothing was queued for
 379         // emerging, continue next time browsing from here
 380         if (nearest_emerged_d != -1) {
 381                 new_nearest_unsent_d = nearest_emerged_d;
 382         } else if (nearest_emergefull_d != -1) {
 383                 new_nearest_unsent_d = nearest_emergefull_d;
 384         } else {
 385                 if (d > full_d_max) {
 386                         new_nearest_unsent_d = 0;
 387                         m_nothing_to_send_pause_timer = 2.0f;
 388                         infostream << "Server: map update for player " << m_name << " RemoteClient " << peer_id << ", time: " << m_map_send_completion_timer << "s" << std::endl;
 389                         m_map_send_completion_timer = 0.0f;
 390                 } else {
 391                         if (nearest_sent_d != -1)
 392                                 new_nearest_unsent_d = nearest_sent_d;
 393                         else
 394                                 new_nearest_unsent_d = d;
 395                 }
 396         }
 397
 398         if (new_nearest_unsent_d != -1)
 399                 m_nearest_unsent_d = new_nearest_unsent_d;
 400 }
 401
 402 void RemoteClient::GotBlock(v3s16 p)
 403 {
 404         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
 405                 m_blocks_sending.erase(p);
 406                 // only add to sent blocks if it actually was sending
 407                 // (it might have been modified since)
 408                 m_blocks_sent.insert(p);
 409         } else {
 410                 m_excess_gotblocks++;
 411         }
 412 }
 413
 414 void RemoteClient::SentBlock(v3s16 p)
 415 {
 416         if (m_blocks_sending.find(p) == m_blocks_sending.end())
 417                 m_blocks_sending[p] = 0.0f;
 418         else
 419                 infostream<<"RemoteClient::SentBlock(): Sent block"
 420                                 " already in m_blocks_sending"<<std::endl;
 421 }
 422
 423 void RemoteClient::SetBlockNotSent(v3s16 p)
 424 {
 425         m_nothing_to_send_pause_timer = 0;
 426
 427         // remove the block from sending and sent sets,
 428         // and mark as modified if found
 429         if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
 430                 m_blocks_modified.insert(p);
 431 }
 432
 433 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 434 {
 435         m_nothing_to_send_pause_timer = 0;
 436
 437         for (auto &block : blocks) {
 438                 v3s16 p = block.first;
 439                 // remove the block from sending and sent sets,
 440                 // and mark as modified if found
 441                 if (m_blocks_sending.erase(p) + m_blocks_sent.erase(p) > 0)
 442                         m_blocks_modified.insert(p);
 443         }
 444 }
 445
 446 void RemoteClient::notifyEvent(ClientStateEvent event)
 447 {
 448         std::ostringstream myerror;
 449         switch (m_state)
 450         {
 451         case CS_Invalid:
 452                 //intentionally do nothing
 453                 break;
 454         case CS_Created:
 455                 switch (event) {
 456                 case CSE_Hello:
 457                         m_state = CS_HelloSent;
 458                         break;
 459                 case CSE_Disconnect:
 460                         m_state = CS_Disconnecting;
 461                         break;
 462                 case CSE_SetDenied:
 463                         m_state = CS_Denied;
 464                         break;
 465                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 466                 default:
 467                         myerror << "Created: Invalid client state transition! " << event;
 468                         throw ClientStateError(myerror.str());
 469                 }
 470                 break;
 471         case CS_Denied:
 472                 /* don't do anything if in denied state */
 473                 break;
 474         case CS_HelloSent:
 475                 switch(event)
 476                 {
 477                 case CSE_AuthAccept:
 478                         m_state = CS_AwaitingInit2;
 479                         resetChosenMech();
 480                         break;
 481                 case CSE_Disconnect:
 482                         m_state = CS_Disconnecting;
 483                         break;
 484                 case CSE_SetDenied:
 485                         m_state = CS_Denied;
 486                         resetChosenMech();
 487                         break;
 488                 default:
 489                         myerror << "HelloSent: Invalid client state transition! " << event;
 490                         throw ClientStateError(myerror.str());
 491                 }
 492                 break;
 493         case CS_AwaitingInit2:
 494                 switch(event)
 495                 {
 496                 case CSE_GotInit2:
 497                         confirmSerializationVersion();
 498                         m_state = CS_InitDone;
 499                         break;
 500                 case CSE_Disconnect:
 501                         m_state = CS_Disconnecting;
 502                         break;
 503                 case CSE_SetDenied:
 504                         m_state = CS_Denied;
 505                         break;
 506
 507                 /* Init SetDefinitionsSent SetMediaSent */
 508                 default:
 509                         myerror << "InitSent: Invalid client state transition! " << event;
 510                         throw ClientStateError(myerror.str());
 511                 }
 512                 break;
 513
 514         case CS_InitDone:
 515                 switch(event)
 516                 {
 517                 case CSE_SetDefinitionsSent:
 518                         m_state = CS_DefinitionsSent;
 519                         break;
 520                 case CSE_Disconnect:
 521                         m_state = CS_Disconnecting;
 522                         break;
 523                 case CSE_SetDenied:
 524                         m_state = CS_Denied;
 525                         break;
 526
 527                 /* Init GotInit2 SetMediaSent */
 528                 default:
 529                         myerror << "InitDone: Invalid client state transition! " << event;
 530                         throw ClientStateError(myerror.str());
 531                 }
 532                 break;
 533         case CS_DefinitionsSent:
 534                 switch(event)
 535                 {
 536                 case CSE_SetClientReady:
 537                         m_state = CS_Active;
 538                         break;
 539                 case CSE_Disconnect:
 540                         m_state = CS_Disconnecting;
 541                         break;
 542                 case CSE_SetDenied:
 543                         m_state = CS_Denied;
 544                         break;
 545                 /* Init GotInit2 SetDefinitionsSent */
 546                 default:
 547                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 548                         throw ClientStateError(myerror.str());
 549                 }
 550                 break;
 551         case CS_Active:
 552                 switch(event)
 553                 {
 554                 case CSE_SetDenied:
 555                         m_state = CS_Denied;
 556                         break;
 557                 case CSE_Disconnect:
 558                         m_state = CS_Disconnecting;
 559                         break;
 560                 case CSE_SudoSuccess:
 561                         m_state = CS_SudoMode;
 562                         resetChosenMech();
 563                         break;
 564                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 565                 default:
 566                         myerror << "Active: Invalid client state transition! " << event;
 567                         throw ClientStateError(myerror.str());
 568                         break;
 569                 }
 570                 break;
 571         case CS_SudoMode:
 572                 switch(event)
 573                 {
 574                 case CSE_SetDenied:
 575                         m_state = CS_Denied;
 576                         break;
 577                 case CSE_Disconnect:
 578                         m_state = CS_Disconnecting;
 579                         break;
 580                 case CSE_SudoLeave:
 581                         m_state = CS_Active;
 582                         break;
 583                 default:
 584                         myerror << "Active: Invalid client state transition! " << event;
 585                         throw ClientStateError(myerror.str());
 586                         break;
 587                 }
 588                 break;
 589         case CS_Disconnecting:
 590                 /* we are already disconnecting */
 591                 break;
 592         }
 593 }
 594
 595 void RemoteClient::resetChosenMech()
 596 {
 597         if (auth_data) {
 598                 srp_verifier_delete((SRPVerifier *) auth_data);
 599                 auth_data = nullptr;
 600         }
 601         chosen_mech = AUTH_MECHANISM_NONE;
 602 }
 603
 604 u64 RemoteClient::uptime() const
 605 {
 606         return porting::getTimeS() - m_connection_time;
 607 }
 608
 609 ClientInterface::ClientInterface(const std::shared_ptr<con::Connection> & con)
 610 :
 611         m_con(con),
 612         m_env(NULL),
 613         m_print_info_timer(0.0f)
 614 {
 615
 616 }
 617 ClientInterface::~ClientInterface()
 618 {
 619         /*
 620                 Delete clients
 621         */
 622         {
 623                 RecursiveMutexAutoLock clientslock(m_clients_mutex);
 624
 625                 for (auto &client_it : m_clients) {
 626                         // Delete client
 627                         delete client_it.second;
 628                 }
 629         }
 630 }
 631
 632 std::vector<session_t> ClientInterface::getClientIDs(ClientState min_state)
 633 {
 634         std::vector<session_t> reply;
 635         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 636
 637         for (const auto &m_client : m_clients) {
 638                 if (m_client.second->getState() >= min_state)
 639                         reply.push_back(m_client.second->peer_id);
 640         }
 641
 642         return reply;
 643 }
 644
 645 void ClientInterface::markBlockposAsNotSent(const v3s16 &pos)
 646 {
 647         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 648         for (const auto &client : m_clients) {
 649                 if (client.second->getState() >= CS_Active)
 650                         client.second->SetBlockNotSent(pos);
 651         }
 652 }
 653
 654 /**
 655  * Verify if user limit was reached.
 656  * User limit count all clients from HelloSent state (MT protocol user) to Active state
 657  * @return true if user limit was reached
 658  */
 659 bool ClientInterface::isUserLimitReached()
 660 {
 661         return getClientIDs(CS_HelloSent).size() >= g_settings->getU16("max_users");
 662 }
 663
 664 void ClientInterface::step(float dtime)
 665 {
 666         m_print_info_timer += dtime;
 667         if (m_print_info_timer >= 30.0f) {
 668                 m_print_info_timer = 0.0f;
 669                 UpdatePlayerList();
 670         }
 671 }
 672
 673 void ClientInterface::UpdatePlayerList()
 674 {
 675         if (m_env) {
 676                 std::vector<session_t> clients = getClientIDs();
 677                 m_clients_names.clear();
 678
 679                 if (!clients.empty())
 680                         infostream<<"Players:"<<std::endl;
 681
 682                 for (session_t i : clients) {
 683                         RemotePlayer *player = m_env->getPlayer(i);
 684
 685                         if (player == NULL)
 686                                 continue;
 687
 688                         infostream << "* " << player->getName() << "\t";
 689
 690                         {
 691                                 RecursiveMutexAutoLock clientslock(m_clients_mutex);
 692                                 RemoteClient* client = lockedGetClientNoEx(i);
 693                                 if (client)
 694                                         client->PrintInfo(infostream);
 695                         }
 696
 697                         m_clients_names.emplace_back(player->getName());
 698                 }
 699         }
 700 }
 701
 702 void ClientInterface::send(session_t peer_id, u8 channelnum,
 703                 NetworkPacket *pkt, bool reliable)
 704 {
 705         m_con->Send(peer_id, channelnum, pkt, reliable);
 706 }
 707
 708 void ClientInterface::sendToAll(NetworkPacket *pkt)
 709 {
 710         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 711         for (auto &client_it : m_clients) {
 712                 RemoteClient *client = client_it.second;
 713
 714                 if (client->net_proto_version != 0) {
 715                         m_con->Send(client->peer_id,
 716                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 717                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 718                 }
 719         }
 720 }
 721
 722 RemoteClient* ClientInterface::getClientNoEx(session_t peer_id, ClientState state_min)
 723 {
 724         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 725         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 726         // The client may not exist; clients are immediately removed if their
 727         // access is denied, and this event occurs later then.
 728         if (n == m_clients.end())
 729                 return NULL;
 730
 731         if (n->second->getState() >= state_min)
 732                 return n->second;
 733
 734         return NULL;
 735 }
 736
 737 RemoteClient* ClientInterface::lockedGetClientNoEx(session_t peer_id, ClientState state_min)
 738 {
 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 ClientState ClientInterface::getClientState(session_t peer_id)
 752 {
 753         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 754         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 755         // The client may not exist; clients are immediately removed if their
 756         // access is denied, and this event occurs later then.
 757         if (n == m_clients.end())
 758                 return CS_Invalid;
 759
 760         return n->second->getState();
 761 }
 762
 763 void ClientInterface::setPlayerName(session_t peer_id, const std::string &name)
 764 {
 765         RecursiveMutexAutoLock clientslock(m_clients_mutex);
 766         RemoteClientMap::iterator n = m_clients.find(peer_id);
 767         // The client may not exist; clients are immediately removed if their
 768         // access is denied, and this event occurs later then.
 769         if (n != m_clients.end())
 770                 n->second->setName(name);
 771 }
 772
 773 void ClientInterface::DeleteClient(session_t peer_id)
 774 {
 775         RecursiveMutexAutoLock conlock(m_clients_mutex);
 776
 777         // Error check
 778         RemoteClientMap::iterator n = m_clients.find(peer_id);
 779         // The client may not exist; clients are immediately removed if their
 780         // access is denied, and this event occurs later then.
 781         if (n == m_clients.end())
 782                 return;
 783
 784         /*
 785                 Mark objects to be not known by the client
 786         */
 787         //TODO this should be done by client destructor!!!
 788         RemoteClient *client = n->second;
 789         // Handle objects
 790         for (u16 id : client->m_known_objects) {
 791                 // Get object
 792                 ServerActiveObject* obj = m_env->getActiveObject(id);
 793
 794                 if(obj && obj->m_known_by_count > 0)
 795                         obj->m_known_by_count--;
 796         }
 797
 798         // Delete client
 799         delete m_clients[peer_id];
 800         m_clients.erase(peer_id);
 801 }
 802
 803 void ClientInterface::CreateClient(session_t peer_id)
 804 {
 805         RecursiveMutexAutoLock conlock(m_clients_mutex);
 806
 807         // Error check
 808         RemoteClientMap::iterator n = m_clients.find(peer_id);
 809         // The client shouldn't already exist
 810         if (n != m_clients.end()) return;
 811
 812         // Create client
 813         RemoteClient *client = new RemoteClient();
 814         client->peer_id = peer_id;
 815         m_clients[client->peer_id] = client;
 816 }
 817
 818 void ClientInterface::event(session_t peer_id, ClientStateEvent event)
 819 {
 820         {
 821                 RecursiveMutexAutoLock clientlock(m_clients_mutex);
 822
 823                 // Error check
 824                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 825
 826                 // No client to deliver event
 827                 if (n == m_clients.end())
 828                         return;
 829                 n->second->notifyEvent(event);
 830         }
 831
 832         if ((event == CSE_SetClientReady) ||
 833                 (event == CSE_Disconnect)     ||
 834                 (event == CSE_SetDenied))
 835         {
 836                 UpdatePlayerList();
 837         }
 838 }
 839
 840 u16 ClientInterface::getProtocolVersion(session_t peer_id)
 841 {
 842         RecursiveMutexAutoLock conlock(m_clients_mutex);
 843
 844         // Error check
 845         RemoteClientMap::iterator n = m_clients.find(peer_id);
 846
 847         // No client to get version
 848         if (n == m_clients.end())
 849                 return 0;
 850
 851         return n->second->net_proto_version;
 852 }
 853
 854 void ClientInterface::setClientVersion(session_t peer_id, u8 major, u8 minor, u8 patch,
 855                 const std::string &full)
 856 {
 857         RecursiveMutexAutoLock conlock(m_clients_mutex);
 858
 859         // Error check
 860         RemoteClientMap::iterator n = m_clients.find(peer_id);
 861
 862         // No client to set versions
 863         if (n == m_clients.end())
 864                 return;
 865
 866         n->second->setVersionInfo(major, minor, patch, full);
 867 }