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
  22 #include "clientiface.h"
  23 #include "remoteplayer.h"
  24 #include "settings.h"
  25 #include "mapblock.h"
  26 #include "network/connection.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 "network/serveropcodes.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 void RemoteClient::ResendBlockIfOnWire(v3s16 p)
  57 {
  58         // if this block is on wire, mark it for sending again as soon as possible
  59         if (m_blocks_sending.find(p) != m_blocks_sending.end()) {
  60                 SetBlockNotSent(p);
  61         }
  62 }
  63
  64 void RemoteClient::GetNextBlocks (
  65                 ServerEnvironment *env,
  66                 EmergeManager * emerge,
  67                 float dtime,
  68                 std::vector<PrioritySortedBlockTransfer> &dest)
  69 {
  70         DSTACK(FUNCTION_NAME);
  71
  72
  73         // Increment timers
  74         m_nothing_to_send_pause_timer -= dtime;
  75         m_nearest_unsent_reset_timer += dtime;
  76
  77         if(m_nothing_to_send_pause_timer >= 0)
  78                 return;
  79
  80         RemotePlayer *player = env->getPlayer(peer_id);
  81         // This can happen sometimes; clients and players are not in perfect sync.
  82         if (!player)
  83                 return;
  84
  85         PlayerSAO *sao = player->getPlayerSAO();
  86         if (!sao)
  87                 return;
  88
  89         // Won't send anything if already sending
  90         if(m_blocks_sending.size() >= g_settings->getU16
  91                         ("max_simultaneous_block_sends_per_client"))
  92         {
  93                 //infostream<<"Not sending any blocks, Queue full."<<std::endl;
  94                 return;
  95         }
  96
  97         v3f playerpos = sao->getBasePosition();
  98         v3f playerspeed = player->getSpeed();
  99         v3f playerspeeddir(0,0,0);
 100         if(playerspeed.getLength() > 1.0*BS)
 101                 playerspeeddir = playerspeed / playerspeed.getLength();
 102         // Predict to next block
 103         v3f playerpos_predicted = playerpos + playerspeeddir*MAP_BLOCKSIZE*BS;
 104
 105         v3s16 center_nodepos = floatToInt(playerpos_predicted, BS);
 106
 107         v3s16 center = getNodeBlockPos(center_nodepos);
 108
 109         // Camera position and direction
 110         v3f camera_pos = sao->getEyePosition();
 111         v3f camera_dir = v3f(0,0,1);
 112         camera_dir.rotateYZBy(sao->getPitch());
 113         camera_dir.rotateXZBy(sao->getYaw());
 114
 115         /*infostream<<"camera_dir=("<<camera_dir.X<<","<<camera_dir.Y<<","
 116                         <<camera_dir.Z<<")"<<std::endl;*/
 117
 118         /*
 119                 Get the starting value of the block finder radius.
 120         */
 121
 122         if(m_last_center != center)
 123         {
 124                 m_nearest_unsent_d = 0;
 125                 m_last_center = center;
 126         }
 127
 128         /*infostream<<"m_nearest_unsent_reset_timer="
 129                         <<m_nearest_unsent_reset_timer<<std::endl;*/
 130
 131         // Reset periodically to workaround for some bugs or stuff
 132         if(m_nearest_unsent_reset_timer > 20.0)
 133         {
 134                 m_nearest_unsent_reset_timer = 0;
 135                 m_nearest_unsent_d = 0;
 136                 //infostream<<"Resetting m_nearest_unsent_d for "
 137                 //              <<server->getPlayerName(peer_id)<<std::endl;
 138         }
 139
 140         //s16 last_nearest_unsent_d = m_nearest_unsent_d;
 141         s16 d_start = m_nearest_unsent_d;
 142
 143         //infostream<<"d_start="<<d_start<<std::endl;
 144
 145         u16 max_simul_sends_setting = g_settings->getU16
 146                         ("max_simultaneous_block_sends_per_client");
 147         u16 max_simul_sends_usually = max_simul_sends_setting;
 148
 149         /*
 150                 Check the time from last addNode/removeNode.
 151
 152                 Decrease send rate if player is building stuff.
 153         */
 154         m_time_from_building += dtime;
 155         if(m_time_from_building < g_settings->getFloat(
 156                                 "full_block_send_enable_min_time_from_building"))
 157         {
 158                 max_simul_sends_usually
 159                         = LIMITED_MAX_SIMULTANEOUS_BLOCK_SENDS;
 160         }
 161
 162         /*
 163                 Number of blocks sending + number of blocks selected for sending
 164         */
 165         u32 num_blocks_selected = m_blocks_sending.size();
 166
 167         /*
 168                 next time d will be continued from the d from which the nearest
 169                 unsent block was found this time.
 170
 171                 This is because not necessarily any of the blocks found this
 172                 time are actually sent.
 173         */
 174         s32 new_nearest_unsent_d = -1;
 175
 176         // get view range and camera fov from the client
 177         s16 wanted_range = sao->getWantedRange();
 178         float camera_fov = sao->getFov();
 179         // if FOV, wanted_range are not available (old client), fall back to old default
 180         if (wanted_range <= 0) wanted_range = 1000;
 181         if (camera_fov <= 0) camera_fov = (72.0*M_PI/180) * 4./3.;
 182
 183         const s16 full_d_max = MYMIN(g_settings->getS16("max_block_send_distance"), wanted_range);
 184         const s16 d_opt = MYMIN(g_settings->getS16("block_send_optimize_distance"), wanted_range);
 185         const s16 d_blocks_in_sight = full_d_max * BS * MAP_BLOCKSIZE;
 186         //infostream << "Fov from client " << camera_fov << " full_d_max " << full_d_max << std::endl;
 187
 188         s16 d_max = full_d_max;
 189         s16 d_max_gen = MYMIN(g_settings->getS16("max_block_generate_distance"), wanted_range);
 190
 191         // Don't loop very much at a time
 192         s16 max_d_increment_at_time = 2;
 193         if(d_max > d_start + max_d_increment_at_time)
 194                 d_max = d_start + max_d_increment_at_time;
 195
 196         s32 nearest_emerged_d = -1;
 197         s32 nearest_emergefull_d = -1;
 198         s32 nearest_sent_d = -1;
 199         //bool queue_is_full = false;
 200
 201         const v3s16 cam_pos_nodes = floatToInt(camera_pos, BS);
 202         const bool occ_cull = g_settings->getBool("server_side_occlusion_culling");
 203
 204         s16 d;
 205         for(d = d_start; d <= d_max; d++) {
 206                 /*
 207                         Get the border/face dot coordinates of a "d-radiused"
 208                         box
 209                 */
 210                 std::vector<v3s16> list = FacePositionCache::getFacePositions(d);
 211
 212                 std::vector<v3s16>::iterator li;
 213                 for(li = list.begin(); li != list.end(); ++li) {
 214                         v3s16 p = *li + center;
 215
 216                         /*
 217                                 Send throttling
 218                                 - Don't allow too many simultaneous transfers
 219                                 - EXCEPT when the blocks are very close
 220
 221                                 Also, don't send blocks that are already flying.
 222                         */
 223
 224                         // Start with the usual maximum
 225                         u16 max_simul_dynamic = max_simul_sends_usually;
 226
 227                         // If block is very close, allow full maximum
 228                         if(d <= BLOCK_SEND_DISABLE_LIMITS_MAX_D)
 229                                 max_simul_dynamic = max_simul_sends_setting;
 230
 231                         // Don't select too many blocks for sending
 232                         if (num_blocks_selected >= max_simul_dynamic) {
 233                                 //queue_is_full = true;
 234                                 goto queue_full_break;
 235                         }
 236
 237                         // Don't send blocks that are currently being transferred
 238                         if (m_blocks_sending.find(p) != m_blocks_sending.end())
 239                                 continue;
 240
 241                         /*
 242                                 Do not go over max mapgen limit
 243                         */
 244                         if (blockpos_over_max_limit(p))
 245                                 continue;
 246
 247                         // If this is true, inexistent block will be made from scratch
 248                         bool generate = d <= d_max_gen;
 249
 250                         /*
 251                                 Don't generate or send if not in sight
 252                                 FIXME This only works if the client uses a small enough
 253                                 FOV setting. The default of 72 degrees is fine.
 254                         */
 255
 256                         f32 dist;
 257                         if (!isBlockInSight(p, camera_pos, camera_dir, camera_fov, d_blocks_in_sight, &dist)) {
 258                                 continue;
 259                         }
 260
 261                         /*
 262                                 Don't send already sent blocks
 263                         */
 264                         {
 265                                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 266                                 {
 267                                         continue;
 268                                 }
 269                         }
 270
 271                         /*
 272                                 Check if map has this block
 273                         */
 274                         MapBlock *block = env->getMap().getBlockNoCreateNoEx(p);
 275
 276                         bool surely_not_found_on_disk = false;
 277                         bool block_is_invalid = false;
 278                         if (block) {
 279                                 // Reset usage timer, this block will be of use in the future.
 280                                 block->resetUsageTimer();
 281
 282                                 // Block is dummy if data doesn't exist.
 283                                 // It means it has been not found from disk and not generated
 284                                 if(block->isDummy())
 285                                 {
 286                                         surely_not_found_on_disk = true;
 287                                 }
 288
 289                                 if(block->isGenerated() == false)
 290                                         block_is_invalid = true;
 291
 292                                 /*
 293                                         If block is not close, don't send it unless it is near
 294                                         ground level.
 295
 296                                         Block is near ground level if night-time mesh
 297                                         differs from day-time mesh.
 298                                 */
 299                                 if(d >= d_opt)
 300                                 {
 301                                         if(block->getDayNightDiff() == false)
 302                                                 continue;
 303                                 }
 304
 305                                 if (occ_cull && !block_is_invalid &&
 306                                                 env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
 307                                         continue;
 308                                 }
 309                         }
 310
 311                         /*
 312                                 If block has been marked to not exist on disk (dummy)
 313                                 and generating new ones is not wanted, skip block.
 314                         */
 315                         if(generate == false && surely_not_found_on_disk == true)
 316                         {
 317                                 // get next one.
 318                                 continue;
 319                         }
 320
 321                         /*
 322                                 Add inexistent block to emerge queue.
 323                         */
 324                         if(block == NULL || surely_not_found_on_disk || block_is_invalid)
 325                         {
 326                                 if (emerge->enqueueBlockEmerge(peer_id, p, generate)) {
 327                                         if (nearest_emerged_d == -1)
 328                                                 nearest_emerged_d = d;
 329                                 } else {
 330                                         if (nearest_emergefull_d == -1)
 331                                                 nearest_emergefull_d = d;
 332                                         goto queue_full_break;
 333                                 }
 334
 335                                 // get next one.
 336                                 continue;
 337                         }
 338
 339                         if(nearest_sent_d == -1)
 340                                 nearest_sent_d = d;
 341
 342                         /*
 343                                 Add block to send queue
 344                         */
 345                         PrioritySortedBlockTransfer q((float)dist, p, peer_id);
 346
 347                         dest.push_back(q);
 348
 349                         num_blocks_selected += 1;
 350                 }
 351         }
 352 queue_full_break:
 353
 354         // If nothing was found for sending and nothing was queued for
 355         // emerging, continue next time browsing from here
 356         if(nearest_emerged_d != -1){
 357                 new_nearest_unsent_d = nearest_emerged_d;
 358         } else if(nearest_emergefull_d != -1){
 359                 new_nearest_unsent_d = nearest_emergefull_d;
 360         } else {
 361                 if(d > full_d_max){
 362                         new_nearest_unsent_d = 0;
 363                         m_nothing_to_send_pause_timer = 2.0;
 364                 } else {
 365                         if(nearest_sent_d != -1)
 366                                 new_nearest_unsent_d = nearest_sent_d;
 367                         else
 368                                 new_nearest_unsent_d = d;
 369                 }
 370         }
 371
 372         if(new_nearest_unsent_d != -1)
 373                 m_nearest_unsent_d = new_nearest_unsent_d;
 374 }
 375
 376 void RemoteClient::GotBlock(v3s16 p)
 377 {
 378         if (m_blocks_modified.find(p) == m_blocks_modified.end()) {
 379                 if (m_blocks_sending.find(p) != m_blocks_sending.end())
 380                         m_blocks_sending.erase(p);
 381                 else
 382                         m_excess_gotblocks++;
 383
 384                 m_blocks_sent.insert(p);
 385         }
 386 }
 387
 388 void RemoteClient::SentBlock(v3s16 p)
 389 {
 390         if (m_blocks_modified.find(p) != m_blocks_modified.end())
 391                 m_blocks_modified.erase(p);
 392
 393         if(m_blocks_sending.find(p) == m_blocks_sending.end())
 394                 m_blocks_sending[p] = 0.0;
 395         else
 396                 infostream<<"RemoteClient::SentBlock(): Sent block"
 397                                 " already in m_blocks_sending"<<std::endl;
 398 }
 399
 400 void RemoteClient::SetBlockNotSent(v3s16 p)
 401 {
 402         m_nearest_unsent_d = 0;
 403         m_nothing_to_send_pause_timer = 0;
 404
 405         if(m_blocks_sending.find(p) != m_blocks_sending.end())
 406                 m_blocks_sending.erase(p);
 407         if(m_blocks_sent.find(p) != m_blocks_sent.end())
 408                 m_blocks_sent.erase(p);
 409         m_blocks_modified.insert(p);
 410 }
 411
 412 void RemoteClient::SetBlocksNotSent(std::map<v3s16, MapBlock*> &blocks)
 413 {
 414         m_nearest_unsent_d = 0;
 415         m_nothing_to_send_pause_timer = 0;
 416
 417         for(std::map<v3s16, MapBlock*>::iterator
 418                         i = blocks.begin();
 419                         i != blocks.end(); ++i)
 420         {
 421                 v3s16 p = i->first;
 422                 m_blocks_modified.insert(p);
 423
 424                 if(m_blocks_sending.find(p) != m_blocks_sending.end())
 425                         m_blocks_sending.erase(p);
 426                 if(m_blocks_sent.find(p) != m_blocks_sent.end())
 427                         m_blocks_sent.erase(p);
 428         }
 429 }
 430
 431 void RemoteClient::notifyEvent(ClientStateEvent event)
 432 {
 433         std::ostringstream myerror;
 434         switch (m_state)
 435         {
 436         case CS_Invalid:
 437                 //intentionally do nothing
 438                 break;
 439         case CS_Created:
 440                 switch (event) {
 441                 case CSE_Hello:
 442                         m_state = CS_HelloSent;
 443                         break;
 444                 case CSE_InitLegacy:
 445                         m_state = CS_AwaitingInit2;
 446                         break;
 447                 case CSE_Disconnect:
 448                         m_state = CS_Disconnecting;
 449                         break;
 450                 case CSE_SetDenied:
 451                         m_state = CS_Denied;
 452                         break;
 453                 /* GotInit2 SetDefinitionsSent SetMediaSent */
 454                 default:
 455                         myerror << "Created: Invalid client state transition! " << event;
 456                         throw ClientStateError(myerror.str());
 457                 }
 458                 break;
 459         case CS_Denied:
 460                 /* don't do anything if in denied state */
 461                 break;
 462         case CS_HelloSent:
 463                 switch(event)
 464                 {
 465                 case CSE_AuthAccept:
 466                         m_state = CS_AwaitingInit2;
 467                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 468                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 469                                 srp_verifier_delete((SRPVerifier *) auth_data);
 470                         chosen_mech = AUTH_MECHANISM_NONE;
 471                         break;
 472                 case CSE_Disconnect:
 473                         m_state = CS_Disconnecting;
 474                         break;
 475                 case CSE_SetDenied:
 476                         m_state = CS_Denied;
 477                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 478                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 479                                 srp_verifier_delete((SRPVerifier *) auth_data);
 480                         chosen_mech = AUTH_MECHANISM_NONE;
 481                         break;
 482                 default:
 483                         myerror << "HelloSent: Invalid client state transition! " << event;
 484                         throw ClientStateError(myerror.str());
 485                 }
 486                 break;
 487         case CS_AwaitingInit2:
 488                 switch(event)
 489                 {
 490                 case CSE_GotInit2:
 491                         confirmSerializationVersion();
 492                         m_state = CS_InitDone;
 493                         break;
 494                 case CSE_Disconnect:
 495                         m_state = CS_Disconnecting;
 496                         break;
 497                 case CSE_SetDenied:
 498                         m_state = CS_Denied;
 499                         break;
 500
 501                 /* Init SetDefinitionsSent SetMediaSent */
 502                 default:
 503                         myerror << "InitSent: Invalid client state transition! " << event;
 504                         throw ClientStateError(myerror.str());
 505                 }
 506                 break;
 507
 508         case CS_InitDone:
 509                 switch(event)
 510                 {
 511                 case CSE_SetDefinitionsSent:
 512                         m_state = CS_DefinitionsSent;
 513                         break;
 514                 case CSE_Disconnect:
 515                         m_state = CS_Disconnecting;
 516                         break;
 517                 case CSE_SetDenied:
 518                         m_state = CS_Denied;
 519                         break;
 520
 521                 /* Init GotInit2 SetMediaSent */
 522                 default:
 523                         myerror << "InitDone: Invalid client state transition! " << event;
 524                         throw ClientStateError(myerror.str());
 525                 }
 526                 break;
 527         case CS_DefinitionsSent:
 528                 switch(event)
 529                 {
 530                 case CSE_SetClientReady:
 531                         m_state = CS_Active;
 532                         break;
 533                 case CSE_Disconnect:
 534                         m_state = CS_Disconnecting;
 535                         break;
 536                 case CSE_SetDenied:
 537                         m_state = CS_Denied;
 538                         break;
 539                 /* Init GotInit2 SetDefinitionsSent */
 540                 default:
 541                         myerror << "DefinitionsSent: Invalid client state transition! " << event;
 542                         throw ClientStateError(myerror.str());
 543                 }
 544                 break;
 545         case CS_Active:
 546                 switch(event)
 547                 {
 548                 case CSE_SetDenied:
 549                         m_state = CS_Denied;
 550                         break;
 551                 case CSE_Disconnect:
 552                         m_state = CS_Disconnecting;
 553                         break;
 554                 case CSE_SudoSuccess:
 555                         m_state = CS_SudoMode;
 556                         if ((chosen_mech == AUTH_MECHANISM_SRP)
 557                                         || (chosen_mech == AUTH_MECHANISM_LEGACY_PASSWORD))
 558                                 srp_verifier_delete((SRPVerifier *) auth_data);
 559                         chosen_mech = AUTH_MECHANISM_NONE;
 560                         break;
 561                 /* Init GotInit2 SetDefinitionsSent SetMediaSent SetDenied */
 562                 default:
 563                         myerror << "Active: Invalid client state transition! " << event;
 564                         throw ClientStateError(myerror.str());
 565                         break;
 566                 }
 567                 break;
 568         case CS_SudoMode:
 569                 switch(event)
 570                 {
 571                 case CSE_SetDenied:
 572                         m_state = CS_Denied;
 573                         break;
 574                 case CSE_Disconnect:
 575                         m_state = CS_Disconnecting;
 576                         break;
 577                 case CSE_SudoLeave:
 578                         m_state = CS_Active;
 579                         break;
 580                 default:
 581                         myerror << "Active: Invalid client state transition! " << event;
 582                         throw ClientStateError(myerror.str());
 583                         break;
 584                 }
 585                 break;
 586         case CS_Disconnecting:
 587                 /* we are already disconnecting */
 588                 break;
 589         }
 590 }
 591
 592 u64 RemoteClient::uptime() const
 593 {
 594         return porting::getTimeS() - m_connection_time;
 595 }
 596
 597 ClientInterface::ClientInterface(con::Connection* con)
 598 :
 599         m_con(con),
 600         m_env(NULL),
 601         m_print_info_timer(0.0)
 602 {
 603
 604 }
 605 ClientInterface::~ClientInterface()
 606 {
 607         /*
 608                 Delete clients
 609         */
 610         {
 611                 MutexAutoLock clientslock(m_clients_mutex);
 612
 613                 for (RemoteClientMap::iterator i = m_clients.begin();
 614                         i != m_clients.end(); ++i) {
 615                         // Delete client
 616                         delete i->second;
 617                 }
 618         }
 619 }
 620
 621 std::vector<u16> ClientInterface::getClientIDs(ClientState min_state)
 622 {
 623         std::vector<u16> reply;
 624         MutexAutoLock clientslock(m_clients_mutex);
 625
 626         for (RemoteClientMap::iterator i = m_clients.begin();
 627                 i != m_clients.end(); ++i) {
 628                 if (i->second->getState() >= min_state)
 629                         reply.push_back(i->second->peer_id);
 630         }
 631
 632         return reply;
 633 }
 634
 635 void ClientInterface::step(float dtime)
 636 {
 637         m_print_info_timer += dtime;
 638         if(m_print_info_timer >= 30.0)
 639         {
 640                 m_print_info_timer = 0.0;
 641                 UpdatePlayerList();
 642         }
 643 }
 644
 645 void ClientInterface::UpdatePlayerList()
 646 {
 647         if (m_env) {
 648                 std::vector<u16> clients = getClientIDs();
 649                 m_clients_names.clear();
 650
 651
 652                 if(!clients.empty())
 653                         infostream<<"Players:"<<std::endl;
 654
 655                 for (std::vector<u16>::iterator i = clients.begin(); i != clients.end(); ++i) {
 656                         RemotePlayer *player = m_env->getPlayer(*i);
 657
 658                         if (player == NULL)
 659                                 continue;
 660
 661                         infostream << "* " << player->getName() << "\t";
 662
 663                         {
 664                                 MutexAutoLock clientslock(m_clients_mutex);
 665                                 RemoteClient* client = lockedGetClientNoEx(*i);
 666                                 if (client)
 667                                         client->PrintInfo(infostream);
 668                         }
 669
 670                         m_clients_names.push_back(player->getName());
 671                 }
 672         }
 673 }
 674
 675 void ClientInterface::send(u16 peer_id, u8 channelnum,
 676                 NetworkPacket* pkt, bool reliable)
 677 {
 678         m_con->Send(peer_id, channelnum, pkt, reliable);
 679 }
 680
 681 void ClientInterface::sendToAll(NetworkPacket *pkt)
 682 {
 683         MutexAutoLock clientslock(m_clients_mutex);
 684         for (RemoteClientMap::iterator i = m_clients.begin();
 685                         i != m_clients.end(); ++i) {
 686                 RemoteClient *client = i->second;
 687
 688                 if (client->net_proto_version != 0) {
 689                         m_con->Send(client->peer_id,
 690                                         clientCommandFactoryTable[pkt->getCommand()].channel, pkt,
 691                                         clientCommandFactoryTable[pkt->getCommand()].reliable);
 692                 }
 693         }
 694 }
 695
 696 void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
 697                 u16 min_proto_ver)
 698 {
 699         MutexAutoLock clientslock(m_clients_mutex);
 700         for (std::unordered_map<u16, RemoteClient*>::iterator i = m_clients.begin();
 701                         i != m_clients.end(); ++i) {
 702                 RemoteClient *client = i->second;
 703                 NetworkPacket *pkt_to_send = nullptr;
 704
 705                 if (client->net_proto_version >= min_proto_ver) {
 706                         pkt_to_send = pkt;
 707                 } else if (client->net_proto_version != 0) {
 708                         pkt_to_send = legacypkt;
 709                 } else {
 710                         warningstream << "Client with unhandled version to handle: '"
 711                                 << client->net_proto_version << "'";
 712                         continue;
 713                 }
 714
 715                 m_con->Send(client->peer_id,
 716                         clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
 717                         pkt_to_send,
 718                         clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
 719         }
 720 }
 721
 722 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 723 {
 724         MutexAutoLock 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         else
 734                 return NULL;
 735 }
 736
 737 RemoteClient* ClientInterface::lockedGetClientNoEx(u16 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         else
 748                 return NULL;
 749 }
 750
 751 ClientState ClientInterface::getClientState(u16 peer_id)
 752 {
 753         MutexAutoLock 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(u16 peer_id,std::string name)
 764 {
 765         MutexAutoLock 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(u16 peer_id)
 774 {
 775         MutexAutoLock 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 (std::set<u16>::iterator i = client->m_known_objects.begin();
 791                         i != client->m_known_objects.end(); ++i) {
 792                 // Get object
 793                 u16 id = *i;
 794                 ServerActiveObject* obj = m_env->getActiveObject(id);
 795
 796                 if(obj && obj->m_known_by_count > 0)
 797                         obj->m_known_by_count--;
 798         }
 799
 800         // Delete client
 801         delete m_clients[peer_id];
 802         m_clients.erase(peer_id);
 803 }
 804
 805 void ClientInterface::CreateClient(u16 peer_id)
 806 {
 807         MutexAutoLock conlock(m_clients_mutex);
 808
 809         // Error check
 810         RemoteClientMap::iterator n = m_clients.find(peer_id);
 811         // The client shouldn't already exist
 812         if (n != m_clients.end()) return;
 813
 814         // Create client
 815         RemoteClient *client = new RemoteClient();
 816         client->peer_id = peer_id;
 817         m_clients[client->peer_id] = client;
 818 }
 819
 820 void ClientInterface::event(u16 peer_id, ClientStateEvent event)
 821 {
 822         {
 823                 MutexAutoLock clientlock(m_clients_mutex);
 824
 825                 // Error check
 826                 RemoteClientMap::iterator n = m_clients.find(peer_id);
 827
 828                 // No client to deliver event
 829                 if (n == m_clients.end())
 830                         return;
 831                 n->second->notifyEvent(event);
 832         }
 833
 834         if ((event == CSE_SetClientReady) ||
 835                 (event == CSE_Disconnect)     ||
 836                 (event == CSE_SetDenied))
 837         {
 838                 UpdatePlayerList();
 839         }
 840 }
 841
 842 u16 ClientInterface::getProtocolVersion(u16 peer_id)
 843 {
 844         MutexAutoLock conlock(m_clients_mutex);
 845
 846         // Error check
 847         RemoteClientMap::iterator n = m_clients.find(peer_id);
 848
 849         // No client to get version
 850         if (n == m_clients.end())
 851                 return 0;
 852
 853         return n->second->net_proto_version;
 854 }
 855
 856 void ClientInterface::setClientVersion(u16 peer_id, u8 major, u8 minor, u8 patch, std::string full)
 857 {
 858         MutexAutoLock conlock(m_clients_mutex);
 859
 860         // Error check
 861         RemoteClientMap::iterator n = m_clients.find(peer_id);
 862
 863         // No client to set versions
 864         if (n == m_clients.end())
 865                 return;
 866
 867         n->second->setVersionInfo(major,minor,patch,full);
 868 }