src/clientiface.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include <sstream>
  21 #include "clientiface.h"
  22 #include "network/connection.h"
  23 #include "network/serveropcodes.h"
  24 #include "remoteplayer.h"
  25 #include "settings.h"
  26 #include "mapblock.h"
  27 #include "serverenvironment.h"
  28 #include "map.h"
  29 #include "emerge.h"
  30 #include "content_sao.h"              // TODO this is used for cleanup of only
  31 #include "log.h"
  32 #include "util/srp.h"
  33 #include "face_position_cache.h"
  34
  35 const char *ClientInterface::statenames[] = {
  36         "Invalid",
  37         "Disconnecting",
  38         "Denied",
  39         "Created",
  40         "AwaitingInit2",
  41         "HelloSent",
  42         "InitDone",
  43         "DefinitionsSent",
  44         "Active",
  45         "SudoMode",
  46 };
  47
  48
  49
  50 std::string ClientInterface::state2Name(ClientState state)
  51 {
  52         return statenames[state];
  53 }
  54
  55 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  56 {
  57         // if this block is on wire, mark it for sending again as soon as possible
  58         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  59                 SetBlockNotSent(p);
  60         }
  61 }
  62
  63 void RemoteClient::GetNextBlocks (
  64                 ServerEnvironment *env,
  65                 EmergeManager * emerge,
  66                 float dtime,
  67                 std::vector<PrioritySortedBlockTransfer> &dest)
  68 {
  69         DSTACK(FUNCTION_NAME);
  70
  71
  72         // Increment timers
  73         m_nothing_to_send_pause_timer -= dtime;
  74         m_nearest_unsent_reset_timer += dtime;
  75
  76         if(m_nothing_to_send_pause_timer >= 0)
  77                 return;
  78
  79         RemotePlayer *player = env->getPlayer(peer_id);
  80         // This can happen sometimes; clients and players are not in perfect sync.
  81         if (!player)
  82                 return;
  83
  84         PlayerSAO *sao = player->getPlayerSAO();
  85         if (!sao)
  86                 return;
  87
  88         // Won't send anything if already sending
  89         if(m_blocks_sending.size() >= g_settings->getU16
  90                         ("max_simultaneous_block_sends_per_client"))
  91         {
  92                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  93                 return;
  94         }
  95
  96         v3f playerpos = sao->getBasePosition();
  97         const v3f &playerspeed = player->getSpeed();
  98         v3f playerspeeddir(0,0,0);
  99         if(playerspeed.getLength() > 1.0*BS)
 100                 playerspeeddir = playerspeed / playerspeed.getLength();
 101         // Predict to next block
 102         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 103
 104         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 105
 106         v3s16 center = getNodeBlockPos(center_nodepos);
 107
 108         // Camera position and direction
 109         v3f camera_pos = sao->getEyePosition();
 110         v3f camera_dir = v3f(0,0,1);
 111         camera_dir.rotateYZBy(sao->getPitch());
 112         camera_dir.rotateXZBy(sao->getYaw());
 113
 114         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 115                         <<camera_dir.Z<<")"<<std::endl;*/
 116
 117         /*
 118                 Get the starting value of the block finder radius.
 119         */
 120
 121         if(m_last_center != center)
 122         {
 123                 m_nearest_unsent_d = 0;
 124                 m_last_center = center;
 125         }
 126
 127         /*infostream<<"m_nearest_unsent_reset_timer="
 128                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 129
 130         // Reset periodically to workaround for some bugs or stuff
 131         if(m_nearest_unsent_reset_timer > 20.0)
 132         {
 133                 m_nearest_unsent_reset_timer = 0;
 134                 m_nearest_unsent_d = 0;
 135                 //infostream<<"Resetting m_nearest_unsent_d for "
 136                 //              <<server->getPlayerName(peer_id)<<std::endl;
 137         }
 138
 139         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 140         s16 d_start = m_nearest_unsent_d;
 141
 142         //infostream<<"d_start="<<d_start<<std::endl;
 143
 144         u16 max_simul_sends_setting = g_settings->getU16
 145                         ("max_simultaneous_block_sends_per_client");
 146         u16 max_simul_sends_usually = max_simul_sends_setting;
 147
 148         /*
 149                 Check the time from last addNode/removeNode.
 150
 151                 Decrease send rate if player is building stuff.
 152         */
 153         m_time_from_building += dtime;
 154         if(m_time_from_building < g_settings->getFloat(
 155                                 "full_block_send_enable_min_time_from_building"))
 156         {
 157                 max_simul_sends_usually
 158                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 159         }
 160
 161         /*
 162                 Number of blocks sending + number of blocks selected for sending
 163         */
 164         u32 num_blocks_selected = m_blocks_sending.size();
 165
 166         /*
 167                 next time d will be continued from the d from which the nearest
 168                 unsent block was found this time.
 169
 170                 This is because not necessarily any of the blocks found this
 171                 time are actually sent.
 172         */
 173         s32 new_nearest_unsent_d = -1;
 174
 175         // get view range and camera fov from the client
 176         s16 wanted_range = sao->getWantedRange();
 177         float camera_fov = sao->getFov();
 178         // if FOV, wanted_range are not available (old client), fall back to old default
 179         if (wanted_range <= 0) wanted_range = 1000;
 180         if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
 181
 182         const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
 183         const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
 184         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 185         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 186
 187         s16 d_max = full_d_max;
 188         s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 189
 190         // Don't loop very much at a time
 191         s16 max_d_increment_at_time = 2;
 192         if(d_max > d_start + max_d_increment_at_time)
 193                 d_max = d_start + max_d_increment_at_time;
 194
 195         s32 nearest_emerged_d = -1;
 196         s32 nearest_emergefull_d = -1;
 197         s32 nearest_sent_d = -1;
 198         //bool queue_is_full = false;
 199
 200         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 201         const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
 202
 203         s16 d;
 204         for(d = d_start; d <= d_max; d++) {
 205                 /*
 206                         Get the border/face dot coordinates of a "d-radiused"
 207                         box
 208                 */
 209                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 210
 211                 std::vector<v3s16>::iterator li;
 212                 for(li = list.begin(); li != list.end(); ++li) {
 213                         v3s16 p = *li + center;
 214
 215                         /*
 216                                 Send throttling
 217                                 - Don't allow too many simultaneous transfers
 218                                 - EXCEPT when the blocks are very close
 219
 220                                 Also, don't send blocks that are already flying.
 221                         */
 222
 223                         // Start with the usual maximum
 224                         u16 max_simul_dynamic = max_simul_sends_usually;
 225
 226                         // If block is very close, allow full maximum
 227                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 228                                 max_simul_dynamic = max_simul_sends_setting;
 229
 230                         // Don't select too many blocks for sending
 231                         if (num_blocks_selected >= max_simul_dynamic) {
 232                                 //queue_is_full = true;
 233                                 goto queue_full_break;
 234                         }
 235
 236                         // Don't send blocks that are currently being transferred
 237                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 238                                 continue;
 239
 240                         /*
 241                                 Do not go over max mapgen limit
 242                         */
 243                         if (blockpos_over_max_limit(p))
 244                                 continue;
 245
 246                         // If this is true, inexistent block will be made from scratch
 247                         bool generate = d <= d_max_gen;
 248
 249                         /*
 250                                 Don't generate or send if not in sight
 251                                 FIXME This only works if the client uses a small enough
 252                                 FOV setting. The default of 72 degrees is fine.
 253                         */
 254
 255                         f32 dist;
 256                         if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
 257                                 continue;
 258                         }
 259
 260                         /*
 261                                 Don't send already sent blocks
 262                         */
 263                         {
 264                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 265                                 {
 266                                         continue;
 267                                 }
 268                         }
 269
 270                         /*
 271                                 Check if map has this block
 272                         */
 273                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 274
 275                         bool surely_not_found_on_disk = false;
 276                         bool block_is_invalid = false;
 277                         if (block) {
 278                                 // Reset usage timer, this block will be of use in the future.
 279                                 block->resetUsageTimer();
 280
 281                                 // Block is dummy if data doesn't exist.
 282                                 // It means it has been not found from disk and not generated
 283                                 if(block->isDummy())
 284                                 {
 285                                         surely_not_found_on_disk = true;
 286                                 }
 287
 288                                 if(block->isGenerated() == false)
 289                                         block_is_invalid = true;
 290
 291                                 /*
 292                                         If block is not close, don't send it unless it is near
 293                                         ground level.
 294
 295                                         Block is near ground level if night-time mesh
 296                                         differs from day-time mesh.
 297                                 */
 298                                 if(d >= d_opt)
 299                                 {
 300                                         if(block->getDayNightDiff() == false)
 301                                                 continue;
 302                                 }
 303
 304                                 if (occ_cull && !block_is_invalid &&
 305                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 306                                         continue;
 307                                 }
 308                         }
 309
 310                         /*
 311                                 If block has been marked to not exist on disk (dummy)
 312                                 and generating new ones is not wanted, skip block.
 313                         */
 314                         if(generate == false && surely_not_found_on_disk == true)
 315                         {
 316                                 // get next one.
 317                                 continue;
 318                         }
 319
 320                         /*
 321                                 Add inexistent block to emerge queue.
 322                         */
 323                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 324                         {
 325                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 326                                         if (nearest_emerged_d == -1)
 327                                                 nearest_emerged_d = d;
 328                                 } else {
 329                                         if (nearest_emergefull_d == -1)
 330                                                 nearest_emergefull_d = d;
 331                                         goto queue_full_break;
 332                                 }
 333
 334                                 // get next one.
 335                                 continue;
 336                         }
 337
 338                         if(nearest_sent_d == -1)
 339                                 nearest_sent_d = d;
 340
 341                         /*
 342                                 Add block to send queue
 343                         */
 344                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 345
 346                         dest.push_back(q);
 347
 348                         num_blocks_selected += 1;
 349                 }
 350         }
 351 queue_full_break:
 352
 353         // If nothing was found for sending and nothing was queued for
 354         // emerging, continue next time browsing from here
 355         if(nearest_emerged_d != -1){
 356                 new_nearest_unsent_d = nearest_emerged_d;
 357         } else if(nearest_emergefull_d != -1){
 358                 new_nearest_unsent_d = nearest_emergefull_d;
 359         } else {
 360                 if(d > full_d_max){
 361                         new_nearest_unsent_d = 0;
 362                         m_nothing_to_send_pause_timer = 2.0;
 363                 } else {
 364                         if(nearest_sent_d != -1)
 365                                 new_nearest_unsent_d = nearest_sent_d;
 366                         else
 367                                 new_nearest_unsent_d = d;
 368                 }
 369         }
 370
 371         if(new_nearest_unsent_d != -1)
 372                 m_nearest_unsent_d = new_nearest_unsent_d;
 373 }
 374
 375 void RemoteClient::GotBlock(v3s16 p)
 376 {
 377         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 378                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 379                         m_blocks_sending.erase(p);
 380                 else
 381                         m_excess_gotblocks++;
 382
 383                 m_blocks_sent.insert(p);
 384         }
 385 }
 386
 387 void RemoteClient::SentBlock(v3s16 p)
 388 {
 389         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 390                 m_blocks_modified.erase(p);
 391
 392         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 393                 m_blocks_sending[p] = 0.0;
 394         else
 395                 infostream<<"RemoteClient::SentBlock(): Sent block"
 396                                 " already in m_blocks_sending"<<std::endl;
 397 }
 398
 399 void RemoteClient::SetBlockNotSent(v3s16 p)
 400 {
 401         m_nearest_unsent_d = 0;
 402         m_nothing_to_send_pause_timer = 0;
 403
 404         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 405                 m_blocks_sending.erase(p);
 406         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 407                 m_blocks_sent.erase(p);
 408         m_blocks_modified.insert(p);
 409 }
 410
 411 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 412 {
 413         m_nearest_unsent_d = 0;
 414         m_nothing_to_send_pause_timer = 0;
 415
 416         for(std::map<v3s16, MapBlock*>::iterator
 417                         i = blocks.begin();
 418                         i != blocks.end(); ++i)
 419         {
 420                 v3s16 p = i->first;
 421                 m_blocks_modified.insert(p);
 422
 423                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 424                         m_blocks_sending.erase(p);
 425                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 426                         m_blocks_sent.erase(p);
 427         }
 428 }
 429
 430 void RemoteClient::notifyEvent(ClientStateEvent event)
 431 {
 432         std::ostringstream myerror;
 433         switch (m_state)
 434         {
 435         case CS_Invalid:
 436                 //intentionally do nothing
 437                 break;
 438         case CS_Created:
 439                 switch (event) {
 440                 case CSE_Hello:
 441                         m_state = CS_HelloSent;
 442                         break;
 443                 case CSE_InitLegacy:
 444                         m_state = CS_AwaitingInit2;
 445                         break;
 446                 case CSE_Disconnect:
 447                         m_state = CS_Disconnecting;
 448                         break;
 449                 case CSE_SetDenied:
 450                         m_state = CS_Denied;
 451                         break;
 452                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 453                 default:
 454                         myerror << "Created: Invalid client state transition! " << event;
 455                         throw ClientStateError(myerror.str());
 456                 }
 457                 break;
 458         case CS_Denied:
 459                 /* don't do anything if in denied state */
 460                 break;
 461         case CS_HelloSent:
 462                 switch(event)
 463                 {
 464                 case CSE_AuthAccept:
 465                         m_state = CS_AwaitingInit2;
 466                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 467                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 468                                 srp_verifier_delete((SRPVerifier *) auth_data);
 469                         chosen_mech = AUTH_MECHANISM_NONE;
 470                         break;
 471                 case CSE_Disconnect:
 472                         m_state = CS_Disconnecting;
 473                         break;
 474                 case CSE_SetDenied:
 475                         m_state = CS_Denied;
 476                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 477                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 478                                 srp_verifier_delete((SRPVerifier *) auth_data);
 479                         chosen_mech = AUTH_MECHANISM_NONE;
 480                         break;
 481                 default:
 482                         myerror << "HelloSent: Invalid client state transition! " << event;
 483                         throw ClientStateError(myerror.str());
 484                 }
 485                 break;
 486         case CS_AwaitingInit2:
 487                 switch(event)
 488                 {
 489                 case CSE_GotInit2:
 490                         confirmSerializationVersion();
 491                         m_state = CS_InitDone;
 492                         break;
 493                 case CSE_Disconnect:
 494                         m_state = CS_Disconnecting;
 495                         break;
 496                 case CSE_SetDenied:
 497                         m_state = CS_Denied;
 498                         break;
 499
 500                 /* Init SetDefinitionsSent SetMediaSent */
 501                 default:
 502                         myerror << "InitSent: Invalid client state transition! " << event;
 503                         throw ClientStateError(myerror.str());
 504                 }
 505                 break;
 506
 507         case CS_InitDone:
 508                 switch(event)
 509                 {
 510                 case CSE_SetDefinitionsSent:
 511                         m_state = CS_DefinitionsSent;
 512                         break;
 513                 case CSE_Disconnect:
 514                         m_state = CS_Disconnecting;
 515                         break;
 516                 case CSE_SetDenied:
 517                         m_state = CS_Denied;
 518                         break;
 519
 520                 /* Init GotInit2 SetMediaSent */
 521                 default:
 522                         myerror << "InitDone: Invalid client state transition! " << event;
 523                         throw ClientStateError(myerror.str());
 524                 }
 525                 break;
 526         case CS_DefinitionsSent:
 527                 switch(event)
 528                 {
 529                 case CSE_SetClientReady:
 530                         m_state = CS_Active;
 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                 /* Init GotInit2 SetDefinitionsSent */
 539                 default:
 540                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 541                         throw ClientStateError(myerror.str());
 542                 }
 543                 break;
 544         case CS_Active:
 545                 switch(event)
 546                 {
 547                 case CSE_SetDenied:
 548                         m_state = CS_Denied;
 549                         break;
 550                 case CSE_Disconnect:
 551                         m_state = CS_Disconnecting;
 552                         break;
 553                 case CSE_SudoSuccess:
 554                         m_state = CS_SudoMode;
 555                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 556                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 557                                 srp_verifier_delete((SRPVerifier *) auth_data);
 558                         chosen_mech = AUTH_MECHANISM_NONE;
 559                         break;
 560                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 561                 default:
 562                         myerror << "Active: Invalid client state transition! " << event;
 563                         throw ClientStateError(myerror.str());
 564                         break;
 565                 }
 566                 break;
 567         case CS_SudoMode:
 568                 switch(event)
 569                 {
 570                 case CSE_SetDenied:
 571                         m_state = CS_Denied;
 572                         break;
 573                 case CSE_Disconnect:
 574                         m_state = CS_Disconnecting;
 575                         break;
 576                 case CSE_SudoLeave:
 577                         m_state = CS_Active;
 578                         break;
 579                 default:
 580                         myerror << "Active: Invalid client state transition! " << event;
 581                         throw ClientStateError(myerror.str());
 582                         break;
 583                 }
 584                 break;
 585         case CS_Disconnecting:
 586                 /* we are already disconnecting */
 587                 break;
 588         }
 589 }
 590
 591 u64 RemoteClient::uptime() const
 592 {
 593         return porting::getTimeS() - m_connection_time;
 594 }
 595
 596 ClientInterface::ClientInterface(con::Connection* con)
 597 :
 598         m_con(con),
 599         m_env(NULL),
 600         m_print_info_timer(0.0)
 601 {
 602
 603 }
 604 ClientInterface::~ClientInterface()
 605 {
 606         /*
 607                 Delete clients
 608         */
 609         {
 610                 MutexAutoLock clientslock(m_clients_mutex);
 611
 612                 for (RemoteClientMap::iterator i = m_clients.begin();
 613                         i != m_clients.end(); ++i) {
 614                         // Delete client
 615                         delete i->second;
 616                 }
 617         }
 618 }
 619
 620 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 621 {
 622         std::vector<u16> reply;
 623         MutexAutoLock clientslock(m_clients_mutex);
 624
 625         for (RemoteClientMap::iterator i = m_clients.begin();
 626                 i != m_clients.end(); ++i) {
 627                 if (i->second->getState() >= min_state)
 628                         reply.push_back(i->second->peer_id);
 629         }
 630
 631         return reply;
 632 }
 633
 634 void ClientInterface::step(float dtime)
 635 {
 636         m_print_info_timer += dtime;
 637         if(m_print_info_timer >= 30.0)
 638         {
 639                 m_print_info_timer = 0.0;
 640                 UpdatePlayerList();
 641         }
 642 }
 643
 644 void ClientInterface::UpdatePlayerList()
 645 {
 646         if (m_env) {
 647                 std::vector<u16> clients = getClientIDs();
 648                 m_clients_names.clear();
 649
 650
 651                 if(!clients.empty())
 652                         infostream<<"Players:"<<std::endl;
 653
 654                 for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
 655                         RemotePlayer *player = m_env->getPlayer(*i);
 656
 657                         if (player == NULL)
 658                                 continue;
 659
 660                         infostream << "* " << player->getName() << "\t";
 661
 662                         {
 663                                 MutexAutoLock clientslock(m_clients_mutex);
 664                                 RemoteClient* client = lockedGetClientNoEx(*i);
 665                                 if (client)
 666                                         client->PrintInfo(infostream);
 667                         }
 668
 669                         m_clients_names.push_back(player->getName());
 670                 }
 671         }
 672 }
 673
 674 void ClientInterface::send(u16 peer_id, u8 channelnum,
 675                 NetworkPacket* pkt, bool reliable)
 676 {
 677         m_con->Send(peer_id, channelnum, pkt, reliable);
 678 }
 679
 680 void ClientInterface::sendToAll(NetworkPacket *pkt)
 681 {
 682         MutexAutoLock clientslock(m_clients_mutex);
 683         for (RemoteClientMap::iterator i = m_clients.begin();
 684                         i != m_clients.end(); ++i) {
 685                 RemoteClient *client = i->second;
 686
 687                 if (client->net_proto_version != 0) {
 688                         m_con->Send(client->peer_id,
 689                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 690                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 691                 }
 692         }
 693 }
 694
 695 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 696                 u16 min_proto_ver)
 697 {
 698         MutexAutoLock clientslock(m_clients_mutex);
 699         for (std::unordered_map<u16, RemoteClient*>::iterator i = m_clients.begin();
 700                         i != m_clients.end(); ++i) {
 701                 RemoteClient *client = i->second;
 702                 NetworkPacket *pkt_to_send = nullptr;
 703
 704                 if (client->net_proto_version >= min_proto_ver) {
 705                         pkt_to_send = pkt;
 706                 } else if (client->net_proto_version != 0) {
 707                         pkt_to_send = legacypkt;
 708                 } else {
 709                         warningstream << "Client with unhandled version to handle: '"
 710                                 << client->net_proto_version << "'";
 711                         continue;
 712                 }
 713
 714                 m_con->Send(client->peer_id,
 715                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 716                         pkt_to_send,
 717                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 718         }
 719 }
 720
 721 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 722 {
 723         MutexAutoLock clientslock(m_clients_mutex);
 724         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 725         // The client may not exist; clients are immediately removed if their
 726         // access is denied, and this event occurs later then.
 727         if (n == m_clients.end())
 728                 return NULL;
 729
 730         if (n->second->getState() >= state_min)
 731                 return n->second;
 732         else
 733                 return NULL;
 734 }
 735
 736 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 peer_id, ClientState state_min)
 737 {
 738         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 739         // The client may not exist; clients are immediately removed if their
 740         // access is denied, and this event occurs later then.
 741         if (n == m_clients.end())
 742                 return NULL;
 743
 744         if (n->second->getState() >= state_min)
 745                 return n->second;
 746         else
 747                 return NULL;
 748 }
 749
 750 ClientState ClientInterface::getClientState(u16 peer_id)
 751 {
 752         MutexAutoLock clientslock(m_clients_mutex);
 753         RemoteClientMap::const_iterator n = m_clients.find(peer_id);
 754         // The client may not exist; clients are immediately removed if their
 755         // access is denied, and this event occurs later then.
 756         if (n == m_clients.end())
 757                 return CS_Invalid;
 758
 759         return n->second->getState();
 760 }
 761
 762 void ClientInterface::setPlayerName(u16 peer_id,std::string name)
 763 {
 764         MutexAutoLock clientslock(m_clients_mutex);
 765         RemoteClientMap::iterator n = m_clients.find(peer_id);
 766         // The client may not exist; clients are immediately removed if their
 767         // access is denied, and this event occurs later then.
 768         if (n != m_clients.end())
 769                 n->second->setName(name);
 770 }
 771
 772 void ClientInterface::DeleteClient(u16 peer_id)
 773 {
 774         MutexAutoLock conlock(m_clients_mutex);
 775
 776         // Error check
 777         RemoteClientMap::iterator n = m_clients.find(peer_id);
 778         // The client may not exist; clients are immediately removed if their
 779         // access is denied, and this event occurs later then.
 780         if (n == m_clients.end())
 781                 return;
 782
 783         /*
 784                 Mark objects to be not known by the client
 785         */
 786         //TODO this should be done by client destructor!!!
 787         RemoteClient *client = n->second;
 788         // Handle objects
 789         for (std::set<u16>::iterator i = client->m_known_objects.begin();
 790                         i != client->m_known_objects.end(); ++i) {
 791                 // Get object
 792                 u16 id = *i;
 793                 ServerActiveObject* obj = m_env->getActiveObject(id);
 794
 795                 if(obj && obj->m_known_by_count > 0)
 796                         obj->m_known_by_count--;
 797         }
 798
 799         // Delete client
 800         delete m_clients[peer_id];
 801         m_clients.erase(peer_id);
 802 }
 803
 804 void ClientInterface::CreateClient(u16 peer_id)
 805 {
 806         MutexAutoLock conlock(m_clients_mutex);
 807
 808         // Error check
 809         RemoteClientMap::iterator n = m_clients.find(peer_id);
 810         // The client shouldn't already exist
 811         if (n != m_clients.end()) return;
 812
 813         // Create client
 814         RemoteClient *client = new RemoteClient();
 815         client->peer_id = peer_id;
 816         m_clients[client->peer_id] = client;
 817 }
 818
 819 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 820 {
 821         {
 822                 MutexAutoLock clientlock(m_clients_mutex);
 823
 824                 // Error check
 825                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 826
 827                 // No client to deliver event
 828                 if (n == m_clients.end())
 829                         return;
 830                 n->second->notifyEvent(event);
 831         }
 832
 833         if ((event == CSE_SetClientReady) ||
 834                 (event == CSE_Disconnect)     ||
 835                 (event == CSE_SetDenied))
 836         {
 837                 UpdatePlayerList();
 838         }
 839 }
 840
 841 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 842 {
 843         MutexAutoLock conlock(m_clients_mutex);
 844
 845         // Error check
 846         RemoteClientMap::iterator n = m_clients.find(peer_id);
 847
 848         // No client to get version
 849         if (n == m_clients.end())
 850                 return 0;
 851
 852         return n->second->net_proto_version;
 853 }
 854
 855 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 856 {
 857         MutexAutoLock 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 }