src/client/client.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 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 <iostream>
  21 #include <algorithm>
  22 #include <sstream>
  23 #include <cmath>
  24 #include <IFileSystem.h>
  25 #include "client.h"
  26 #include "network/clientopcodes.h"
  27 #include "network/connection.h"
  28 #include "network/networkpacket.h"
  29 #include "threading/mutex_auto_lock.h"
  30 #include "client/clientevent.h"
  31 #include "client/gameui.h"
  32 #include "client/renderingengine.h"
  33 #include "client/sound.h"
  34 #include "client/tile.h"
  35 #include "util/auth.h"
  36 #include "util/directiontables.h"
  37 #include "util/pointedthing.h"
  38 #include "util/serialize.h"
  39 #include "util/string.h"
  40 #include "util/srp.h"
  41 #include "filesys.h"
  42 #include "mapblock_mesh.h"
  43 #include "mapblock.h"
  44 #include "minimap.h"
  45 #include "modchannels.h"
  46 #include "content/mods.h"
  47 #include "profiler.h"
  48 #include "shader.h"
  49 #include "gettext.h"
  50 #include "clientmap.h"
  51 #include "clientmedia.h"
  52 #include "version.h"
  53 #include "database/database-files.h"
  54 #include "database/database-sqlite3.h"
  55 #include "serialization.h"
  56 #include "guiscalingfilter.h"
  57 #include "script/scripting_client.h"
  58 #include "game.h"
  59 #include "chatmessage.h"
  60 #include "translation.h"
  61 #include "content/mod_configuration.h"
  62
  63 extern gui::IGUIEnvironment* guienv;
  64
  65 /*
  66         Utility classes
  67 */
  68
  69 u32 PacketCounter::sum() const
  70 {
  71         u32 n = 0;
  72         for (const auto &it : m_packets)
  73                 n += it.second;
  74         return n;
  75 }
  76
  77 void PacketCounter::print(std::ostream &o) const
  78 {
  79         for (const auto &it : m_packets) {
  80                 auto name = it.first >= TOCLIENT_NUM_MSG_TYPES ? "?"
  81                         : toClientCommandTable[it.first].name;
  82                 o << "cmd " << it.first << " (" << name << ") count "
  83                         << it.second << std::endl;
  84         }
  85 }
  86
  87 /*
  88         Client
  89 */
  90
  91 Client::Client(
  92                 const char *playername,
  93                 const std::string &password,
  94                 const std::string &address_name,
  95                 MapDrawControl &control,
  96                 IWritableTextureSource *tsrc,
  97                 IWritableShaderSource *shsrc,
  98                 IWritableItemDefManager *itemdef,
  99                 NodeDefManager *nodedef,
 100                 ISoundManager *sound,
 101                 MtEventManager *event,
 102                 RenderingEngine *rendering_engine,
 103                 bool ipv6,
 104                 GameUI *game_ui,
 105                 ELoginRegister allow_login_or_register
 106 ):
 107         m_tsrc(tsrc),
 108         m_shsrc(shsrc),
 109         m_itemdef(itemdef),
 110         m_nodedef(nodedef),
 111         m_sound(sound),
 112         m_event(event),
 113         m_rendering_engine(rendering_engine),
 114         m_mesh_update_manager(this),
 115         m_env(
 116                 new ClientMap(this, rendering_engine, control, 666),
 117                 tsrc, this
 118         ),
 119         m_particle_manager(&m_env),
 120         m_con(new con::Connection(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, ipv6, this)),
 121         m_address_name(address_name),
 122         m_allow_login_or_register(allow_login_or_register),
 123         m_server_ser_ver(SER_FMT_VER_INVALID),
 124         m_last_chat_message_sent(time(NULL)),
 125         m_password(password),
 126         m_chosen_auth_mech(AUTH_MECHANISM_NONE),
 127         m_media_downloader(new ClientMediaDownloader()),
 128         m_state(LC_Created),
 129         m_game_ui(game_ui),
 130         m_modchannel_mgr(new ModChannelMgr())
 131 {
 132         // Add local player
 133         m_env.setLocalPlayer(new LocalPlayer(this, playername));
 134
 135         // Make the mod storage database and begin the save for later
 136         m_mod_storage_database =
 137                         new ModStorageDatabaseSQLite3(porting::path_user + DIR_DELIM + "client");
 138         m_mod_storage_database->beginSave();
 139
 140         if (g_settings->getBool("enable_minimap")) {
 141                 m_minimap = new Minimap(this);
 142         }
 143
 144         m_cache_save_interval = g_settings->getU16("server_map_save_interval");
 145 }
 146
 147 void Client::migrateModStorage()
 148 {
 149         std::string mod_storage_dir = porting::path_user + DIR_DELIM + "client";
 150         std::string old_mod_storage = mod_storage_dir + DIR_DELIM + "mod_storage";
 151         if (fs::IsDir(old_mod_storage)) {
 152                 infostream << "Migrating client mod storage to SQLite3 database" << std::endl;
 153                 {
 154                         ModStorageDatabaseFiles files_db(mod_storage_dir);
 155                         std::vector<std::string> mod_list;
 156                         files_db.listMods(&mod_list);
 157                         for (const std::string &modname : mod_list) {
 158                                 infostream << "Migrating client mod storage for mod " << modname << std::endl;
 159                                 StringMap meta;
 160                                 files_db.getModEntries(modname, &meta);
 161                                 for (const auto &pair : meta) {
 162                                         m_mod_storage_database->setModEntry(modname, pair.first, pair.second);
 163                                 }
 164                         }
 165                 }
 166                 if (!fs::Rename(old_mod_storage, old_mod_storage + ".bak")) {
 167                         // Execution cannot move forward if the migration does not complete.
 168                         throw BaseException("Could not finish migrating client mod storage");
 169                 }
 170                 infostream << "Finished migration of client mod storage" << std::endl;
 171         }
 172 }
 173
 174 void Client::loadMods()
 175 {
 176         // Don't load mods twice.
 177         // If client scripting is disabled by the client, don't load builtin or
 178         // client-provided mods.
 179         if (m_mods_loaded || !g_settings->getBool("enable_client_modding"))
 180                 return;
 181
 182         // If client scripting is disabled by the server, don't load builtin or
 183         // client-provided mods.
 184         // TODO Delete this code block when server-sent CSM and verifying of builtin are
 185         // complete.
 186         if (checkCSMRestrictionFlag(CSMRestrictionFlags::CSM_RF_LOAD_CLIENT_MODS)) {
 187                 warningstream << "Client-provided mod loading is disabled by server." <<
 188                         std::endl;
 189                 return;
 190         }
 191
 192         m_script = new ClientScripting(this);
 193         m_env.setScript(m_script);
 194         m_script->setEnv(&m_env);
 195
 196         // Load builtin
 197         scanModIntoMemory(BUILTIN_MOD_NAME, getBuiltinLuaPath());
 198         m_script->loadModFromMemory(BUILTIN_MOD_NAME);
 199         m_script->checkSetByBuiltin();
 200
 201         ModConfiguration modconf;
 202         {
 203                 std::unordered_map<std::string, std::string> paths;
 204                 std::string path_user = porting::path_user + DIR_DELIM + "clientmods";
 205                 const auto modsPath = getClientModsLuaPath();
 206                 if (modsPath != path_user) {
 207                         paths["share"] = modsPath;
 208                 }
 209                 paths["mods"] = path_user;
 210
 211                 std::string settings_path = path_user + DIR_DELIM + "mods.conf";
 212                 modconf.addModsFromConfig(settings_path, paths);
 213                 modconf.checkConflictsAndDeps();
 214         }
 215
 216         m_mods = modconf.getMods();
 217
 218         // complain about mods with unsatisfied dependencies
 219         if (!modconf.isConsistent()) {
 220                 errorstream << modconf.getUnsatisfiedModsError() << std::endl;
 221                 return;
 222         }
 223
 224         // Print mods
 225         infostream << "Client loading mods: ";
 226         for (const ModSpec &mod : m_mods)
 227                 infostream << mod.name << " ";
 228         infostream << std::endl;
 229
 230         // Load "mod" scripts
 231         for (const ModSpec &mod : m_mods) {
 232                 mod.checkAndLog();
 233                 scanModIntoMemory(mod.name, mod.path);
 234         }
 235
 236         // Run them
 237         for (const ModSpec &mod : m_mods)
 238                 m_script->loadModFromMemory(mod.name);
 239
 240         // Mods are done loading. Unlock callbacks
 241         m_mods_loaded = true;
 242
 243         // Run a callback when mods are loaded
 244         m_script->on_mods_loaded();
 245
 246         // Create objects if they're ready
 247         if (m_state == LC_Ready)
 248                 m_script->on_client_ready(m_env.getLocalPlayer());
 249         if (m_camera)
 250                 m_script->on_camera_ready(m_camera);
 251         if (m_minimap)
 252                 m_script->on_minimap_ready(m_minimap);
 253 }
 254
 255 void Client::scanModSubfolder(const std::string &mod_name, const std::string &mod_path,
 256                         std::string mod_subpath)
 257 {
 258         std::string full_path = mod_path + DIR_DELIM + mod_subpath;
 259         std::vector<fs::DirListNode> mod = fs::GetDirListing(full_path);
 260         for (const fs::DirListNode &j : mod) {
 261                 if (j.name[0] == '.')
 262                         continue;
 263
 264                 if (j.dir) {
 265                         scanModSubfolder(mod_name, mod_path, mod_subpath + j.name + DIR_DELIM);
 266                         continue;
 267                 }
 268                 std::replace(mod_subpath.begin(), mod_subpath.end(), DIR_DELIM_CHAR, '/');
 269
 270                 std::string real_path = full_path + j.name;
 271                 std::string vfs_path = mod_name + ":" + mod_subpath + j.name;
 272                 infostream << "Client::scanModSubfolder(): Loading \"" << real_path
 273                                 << "\" as \"" << vfs_path << "\"." << std::endl;
 274
 275                 std::string contents;
 276                 if (!fs::ReadFile(real_path, contents)) {
 277                         errorstream << "Client::scanModSubfolder(): Can't read file \""
 278                                         << real_path << "\"." << std::endl;
 279                         continue;
 280                 }
 281
 282                 m_mod_vfs.emplace(vfs_path, contents);
 283         }
 284 }
 285
 286 const std::string &Client::getBuiltinLuaPath()
 287 {
 288         static const std::string builtin_dir = porting::path_share + DIR_DELIM + "builtin";
 289         return builtin_dir;
 290 }
 291
 292 const std::string &Client::getClientModsLuaPath()
 293 {
 294         static const std::string clientmods_dir = porting::path_share + DIR_DELIM + "clientmods";
 295         return clientmods_dir;
 296 }
 297
 298 const std::vector<ModSpec>& Client::getMods() const
 299 {
 300         static std::vector<ModSpec> client_modspec_temp;
 301         return client_modspec_temp;
 302 }
 303
 304 const ModSpec* Client::getModSpec(const std::string &modname) const
 305 {
 306         return NULL;
 307 }
 308
 309 void Client::Stop()
 310 {
 311         m_shutdown = true;
 312         if (m_mods_loaded)
 313                 m_script->on_shutdown();
 314         //request all client managed threads to stop
 315         m_mesh_update_manager.stop();
 316         // Save local server map
 317         if (m_localdb) {
 318                 infostream << "Local map saving ended." << std::endl;
 319                 m_localdb->endSave();
 320         }
 321
 322         if (m_mods_loaded)
 323                 delete m_script;
 324 }
 325
 326 bool Client::isShutdown()
 327 {
 328         return m_shutdown || !m_mesh_update_manager.isRunning();
 329 }
 330
 331 Client::~Client()
 332 {
 333         m_shutdown = true;
 334         m_con->Disconnect();
 335
 336         deleteAuthData();
 337
 338         m_mesh_update_manager.stop();
 339         m_mesh_update_manager.wait();
 340
 341         MeshUpdateResult r;
 342         while (m_mesh_update_manager.getNextResult(r)) {
 343                 for (auto block : r.map_blocks)
 344                         if (block)
 345                                 block->refDrop();
 346                 delete r.mesh;
 347         }
 348
 349         delete m_inventory_from_server;
 350
 351         // Delete detached inventories
 352         for (auto &m_detached_inventorie : m_detached_inventories) {
 353                 delete m_detached_inventorie.second;
 354         }
 355
 356         // cleanup 3d model meshes on client shutdown
 357         m_rendering_engine->cleanupMeshCache();
 358
 359         guiScalingCacheClear();
 360
 361         delete m_minimap;
 362         m_minimap = nullptr;
 363
 364         delete m_media_downloader;
 365
 366         // Write the changes and delete
 367         if (m_mod_storage_database)
 368                 m_mod_storage_database->endSave();
 369         delete m_mod_storage_database;
 370 }
 371
 372 void Client::connect(Address address, bool is_local_server)
 373 {
 374         initLocalMapSaving(address, m_address_name, is_local_server);
 375
 376         // Since we use TryReceive() a timeout here would be ineffective anyway
 377         m_con->SetTimeoutMs(0);
 378         m_con->Connect(address);
 379 }
 380
 381 void Client::step(float dtime)
 382 {
 383         // Limit a bit
 384         if (dtime > 2.0)
 385                 dtime = 2.0;
 386
 387         m_animation_time += dtime;
 388         if(m_animation_time > 60.0)
 389                 m_animation_time -= 60.0;
 390
 391         m_time_of_day_update_timer += dtime;
 392
 393         ReceiveAll();
 394
 395         /*
 396                 Packet counter
 397         */
 398         {
 399                 float &counter = m_packetcounter_timer;
 400                 counter -= dtime;
 401                 if(counter <= 0.0f)
 402                 {
 403                         counter = 30.0f;
 404                         u32 sum = m_packetcounter.sum();
 405                         float avg = sum / counter;
 406
 407                         infostream << "Client packetcounter (" << counter << "s): "
 408                                         << "sum=" << sum << " avg=" << avg << "/s" << std::endl;
 409                         m_packetcounter.print(infostream);
 410                         m_packetcounter.clear();
 411                 }
 412         }
 413
 414         // UGLY hack to fix 2 second startup delay caused by non existent
 415         // server client startup synchronization in local server or singleplayer mode
 416         static bool initial_step = true;
 417         if (initial_step) {
 418                 initial_step = false;
 419         }
 420         else if(m_state == LC_Created) {
 421                 float &counter = m_connection_reinit_timer;
 422                 counter -= dtime;
 423                 if(counter <= 0.0) {
 424                         counter = 2.0;
 425
 426                         LocalPlayer *myplayer = m_env.getLocalPlayer();
 427                         FATAL_ERROR_IF(myplayer == NULL, "Local player not found in environment.");
 428
 429                         sendInit(myplayer->getName());
 430                 }
 431
 432                 // Not connected, return
 433                 return;
 434         }
 435
 436         /*
 437                 Do stuff if connected
 438         */
 439
 440         /*
 441                 Run Map's timers and unload unused data
 442         */
 443         const float map_timer_and_unload_dtime = 5.25;
 444         if(m_map_timer_and_unload_interval.step(dtime, map_timer_and_unload_dtime)) {
 445                 std::vector<v3s16> deleted_blocks;
 446                 m_env.getMap().timerUpdate(map_timer_and_unload_dtime,
 447                         std::max(g_settings->getFloat("client_unload_unused_data_timeout"), 0.0f),
 448                         g_settings->getS32("client_mapblock_limit"),
 449                         &deleted_blocks);
 450
 451                 /*
 452                         Send info to server
 453                         NOTE: This loop is intentionally iterated the way it is.
 454                 */
 455
 456                 std::vector<v3s16>::iterator i = deleted_blocks.begin();
 457                 std::vector<v3s16> sendlist;
 458                 for(;;) {
 459                         if(sendlist.size() == 255 || i == deleted_blocks.end()) {
 460                                 if(sendlist.empty())
 461                                         break;
 462                                 /*
 463                                         [0] u16 command
 464                                         [2] u8 count
 465                                         [3] v3s16 pos_0
 466                                         [3+6] v3s16 pos_1
 467                                         ...
 468                                 */
 469
 470                                 sendDeletedBlocks(sendlist);
 471
 472                                 if(i == deleted_blocks.end())
 473                                         break;
 474
 475                                 sendlist.clear();
 476                         }
 477
 478                         sendlist.push_back(*i);
 479                         ++i;
 480                 }
 481         }
 482
 483         /*
 484                 Send pending messages on out chat queue
 485         */
 486         if (!m_out_chat_queue.empty() && canSendChatMessage()) {
 487                 sendChatMessage(m_out_chat_queue.front());
 488                 m_out_chat_queue.pop();
 489         }
 490
 491         /*
 492                 Handle environment
 493         */
 494         LocalPlayer *player = m_env.getLocalPlayer();
 495
 496         // Step environment (also handles player controls)
 497         m_env.step(dtime);
 498         m_sound->step(dtime);
 499
 500         /*
 501                 Get events
 502         */
 503         while (m_env.hasClientEnvEvents()) {
 504                 ClientEnvEvent envEvent = m_env.getClientEnvEvent();
 505
 506                 if (envEvent.type == CEE_PLAYER_DAMAGE) {
 507                         u16 damage = envEvent.player_damage.amount;
 508
 509                         if (envEvent.player_damage.send_to_server)
 510                                 sendDamage(damage);
 511
 512                         // Add to ClientEvent queue
 513                         ClientEvent *event = new ClientEvent();
 514                         event->type = CE_PLAYER_DAMAGE;
 515                         event->player_damage.amount = damage;
 516                         event->player_damage.effect = true;
 517                         m_client_event_queue.push(event);
 518                 }
 519         }
 520
 521         /*
 522                 Print some info
 523         */
 524         float &counter = m_avg_rtt_timer;
 525         counter += dtime;
 526         if(counter >= 10) {
 527                 counter = 0.0;
 528                 // connectedAndInitialized() is true, peer exists.
 529                 float avg_rtt = getRTT();
 530                 infostream << "Client: avg_rtt=" << avg_rtt << std::endl;
 531         }
 532
 533         /*
 534                 Send player position to server
 535         */
 536         {
 537                 float &counter = m_playerpos_send_timer;
 538                 counter += dtime;
 539                 if((m_state == LC_Ready) && (counter >= m_recommended_send_interval))
 540                 {
 541                         counter = 0.0;
 542                         sendPlayerPos();
 543                 }
 544         }
 545
 546         /*
 547                 Replace updated meshes
 548         */
 549         {
 550                 int num_processed_meshes = 0;
 551                 std::vector<v3s16> blocks_to_ack;
 552                 bool force_update_shadows = false;
 553                 MeshUpdateResult r;
 554                 while (m_mesh_update_manager.getNextResult(r))
 555                 {
 556                         num_processed_meshes++;
 557
 558                         MinimapMapblock *minimap_mapblock = NULL;
 559                         bool do_mapper_update = true;
 560
 561                         MapBlock *block = m_env.getMap().getBlockNoCreateNoEx(r.p);
 562                         if (block) {
 563                                 // Delete the old mesh
 564                                 delete block->mesh;
 565                                 block->mesh = nullptr;
 566
 567                                 if (r.mesh) {
 568                                         block->solid_sides = r.solid_sides;
 569                                         minimap_mapblock = r.mesh->moveMinimapMapblock();
 570                                         if (minimap_mapblock == NULL)
 571                                                 do_mapper_update = false;
 572
 573                                         bool is_empty = true;
 574                                         for (int l = 0; l < MAX_TILE_LAYERS; l++)
 575                                                 if (r.mesh->getMesh(l)->getMeshBufferCount() != 0)
 576                                                         is_empty = false;
 577
 578                                         if (is_empty)
 579                                                 delete r.mesh;
 580                                         else {
 581                                                 // Replace with the new mesh
 582                                                 block->mesh = r.mesh;
 583                                                 if (r.urgent)
 584                                                         force_update_shadows = true;
 585                                         }
 586                                 }
 587                         } else {
 588                                 delete r.mesh;
 589                         }
 590
 591                         if (m_minimap && do_mapper_update)
 592                                 m_minimap->addBlock(r.p, minimap_mapblock);
 593
 594                         if (r.ack_block_to_server) {
 595                                 if (blocks_to_ack.size() == 255) {
 596                                         sendGotBlocks(blocks_to_ack);
 597                                         blocks_to_ack.clear();
 598                                 }
 599
 600                                 blocks_to_ack.emplace_back(r.p);
 601                         }
 602
 603                         for (auto block : r.map_blocks)
 604                                 if (block)
 605                                         block->refDrop();
 606                 }
 607                 if (blocks_to_ack.size() > 0) {
 608                                 // Acknowledge block(s)
 609                                 sendGotBlocks(blocks_to_ack);
 610                 }
 611
 612                 if (num_processed_meshes > 0)
 613                         g_profiler->graphAdd("num_processed_meshes", num_processed_meshes);
 614
 615                 auto shadow_renderer = RenderingEngine::get_shadow_renderer();
 616                 if (shadow_renderer && force_update_shadows)
 617                         shadow_renderer->setForceUpdateShadowMap();
 618         }
 619
 620         /*
 621                 Load fetched media
 622         */
 623         if (m_media_downloader && m_media_downloader->isStarted()) {
 624                 m_media_downloader->step(this);
 625                 if (m_media_downloader->isDone()) {
 626                         delete m_media_downloader;
 627                         m_media_downloader = NULL;
 628                 }
 629         }
 630         {
 631                 // Acknowledge dynamic media downloads to server
 632                 std::vector<u32> done;
 633                 for (auto it = m_pending_media_downloads.begin();
 634                                 it != m_pending_media_downloads.end();) {
 635                         assert(it->second->isStarted());
 636                         it->second->step(this);
 637                         if (it->second->isDone()) {
 638                                 done.emplace_back(it->first);
 639
 640                                 it = m_pending_media_downloads.erase(it);
 641                         } else {
 642                                 it++;
 643                         }
 644
 645                         if (done.size() == 255) { // maximum in one packet
 646                                 sendHaveMedia(done);
 647                                 done.clear();
 648                         }
 649                 }
 650                 if (!done.empty())
 651                         sendHaveMedia(done);
 652         }
 653
 654         /*
 655                 If the server didn't update the inventory in a while, revert
 656                 the local inventory (so the player notices the lag problem
 657                 and knows something is wrong).
 658         */
 659         if (m_inventory_from_server) {
 660                 float interval = 10.0f;
 661                 float count_before = std::floor(m_inventory_from_server_age / interval);
 662
 663                 m_inventory_from_server_age += dtime;
 664
 665                 float count_after = std::floor(m_inventory_from_server_age / interval);
 666
 667                 if (count_after != count_before) {
 668                         // Do this every <interval> seconds after TOCLIENT_INVENTORY
 669                         // Reset the locally changed inventory to the authoritative inventory
 670                         player->inventory = *m_inventory_from_server;
 671                         m_update_wielded_item = true;
 672                 }
 673         }
 674
 675         /*
 676                 Update positions of sounds attached to objects
 677         */
 678         {
 679                 for (auto &m_sounds_to_object : m_sounds_to_objects) {
 680                         int client_id = m_sounds_to_object.first;
 681                         u16 object_id = m_sounds_to_object.second;
 682                         ClientActiveObject *cao = m_env.getActiveObject(object_id);
 683                         if (!cao)
 684                                 continue;
 685                         m_sound->updateSoundPosition(client_id, cao->getPosition());
 686                 }
 687         }
 688
 689         /*
 690                 Handle removed remotely initiated sounds
 691         */
 692         m_removed_sounds_check_timer += dtime;
 693         if(m_removed_sounds_check_timer >= 2.32) {
 694                 m_removed_sounds_check_timer = 0;
 695                 // Find removed sounds and clear references to them
 696                 std::vector<s32> removed_server_ids;
 697                 for (std::unordered_map<s32, int>::iterator i = m_sounds_server_to_client.begin();
 698                                 i != m_sounds_server_to_client.end();) {
 699                         s32 server_id = i->first;
 700                         int client_id = i->second;
 701                         ++i;
 702                         if(!m_sound->soundExists(client_id)) {
 703                                 m_sounds_server_to_client.erase(server_id);
 704                                 m_sounds_client_to_server.erase(client_id);
 705                                 m_sounds_to_objects.erase(client_id);
 706                                 removed_server_ids.push_back(server_id);
 707                         }
 708                 }
 709
 710                 // Sync to server
 711                 if(!removed_server_ids.empty()) {
 712                         sendRemovedSounds(removed_server_ids);
 713                 }
 714         }
 715
 716         // Write changes to the mod storage
 717         m_mod_storage_save_timer -= dtime;
 718         if (m_mod_storage_save_timer <= 0.0f) {
 719                 m_mod_storage_save_timer = g_settings->getFloat("server_map_save_interval");
 720                 m_mod_storage_database->endSave();
 721                 m_mod_storage_database->beginSave();
 722         }
 723
 724         // Write server map
 725         if (m_localdb && m_localdb_save_interval.step(dtime,
 726                         m_cache_save_interval)) {
 727                 m_localdb->endSave();
 728                 m_localdb->beginSave();
 729         }
 730 }
 731
 732 bool Client::loadMedia(const std::string &data, const std::string &filename,
 733         bool from_media_push)
 734 {
 735         std::string name;
 736
 737         const char *image_ext[] = {
 738                 ".png", ".jpg", ".bmp", ".tga",
 739                 ".pcx", ".ppm", ".psd", ".wal", ".rgb",
 740                 NULL
 741         };
 742         name = removeStringEnd(filename, image_ext);
 743         if (!name.empty()) {
 744                 TRACESTREAM(<< "Client: Attempting to load image "
 745                         << "file \"" << filename << "\"" << std::endl);
 746
 747                 io::IFileSystem *irrfs = m_rendering_engine->get_filesystem();
 748                 video::IVideoDriver *vdrv = m_rendering_engine->get_video_driver();
 749
 750                 io::IReadFile *rfile = irrfs->createMemoryReadFile(
 751                                 data.c_str(), data.size(), "_tempreadfile");
 752
 753                 FATAL_ERROR_IF(!rfile, "Could not create irrlicht memory file.");
 754
 755                 // Read image
 756                 video::IImage *img = vdrv->createImageFromFile(rfile);
 757                 if (!img) {
 758                         errorstream<<"Client: Cannot create image from data of "
 759                                         <<"file \""<<filename<<"\""<<std::endl;
 760                         rfile->drop();
 761                         return false;
 762                 }
 763
 764                 m_tsrc->insertSourceImage(filename, img);
 765                 img->drop();
 766                 rfile->drop();
 767                 return true;
 768         }
 769
 770         const char *sound_ext[] = {
 771                 ".0.ogg", ".1.ogg", ".2.ogg", ".3.ogg", ".4.ogg",
 772                 ".5.ogg", ".6.ogg", ".7.ogg", ".8.ogg", ".9.ogg",
 773                 ".ogg", NULL
 774         };
 775         name = removeStringEnd(filename, sound_ext);
 776         if (!name.empty()) {
 777                 TRACESTREAM(<< "Client: Attempting to load sound "
 778                         << "file \"" << filename << "\"" << std::endl);
 779                 return m_sound->loadSoundData(name, data);
 780         }
 781
 782         const char *model_ext[] = {
 783                 ".x", ".b3d", ".md2", ".obj",
 784                 NULL
 785         };
 786         name = removeStringEnd(filename, model_ext);
 787         if (!name.empty()) {
 788                 verbosestream<<"Client: Storing model into memory: "
 789                                 <<"\""<<filename<<"\""<<std::endl;
 790                 if(m_mesh_data.count(filename))
 791                         errorstream<<"Multiple models with name \""<<filename.c_str()
 792                                         <<"\" found; replacing previous model"<<std::endl;
 793                 m_mesh_data[filename] = data;
 794                 return true;
 795         }
 796
 797         const char *translate_ext[] = {
 798                 ".tr", NULL
 799         };
 800         name = removeStringEnd(filename, translate_ext);
 801         if (!name.empty()) {
 802                 if (from_media_push)
 803                         return false;
 804                 TRACESTREAM(<< "Client: Loading translation: "
 805                                 << "\"" << filename << "\"" << std::endl);
 806                 g_client_translations->loadTranslation(data);
 807                 return true;
 808         }
 809
 810         errorstream << "Client: Don't know how to load file \""
 811                 << filename << "\"" << std::endl;
 812         return false;
 813 }
 814
 815 // Virtual methods from con::PeerHandler
 816 void Client::peerAdded(con::Peer *peer)
 817 {
 818         infostream << "Client::peerAdded(): peer->id="
 819                         << peer->id << std::endl;
 820 }
 821
 822 void Client::deletingPeer(con::Peer *peer, bool timeout)
 823 {
 824         infostream << "Client::deletingPeer(): "
 825                         "Server Peer is getting deleted "
 826                         << "(timeout=" << timeout << ")" << std::endl;
 827
 828         m_access_denied = true;
 829         if (timeout)
 830                 m_access_denied_reason = gettext("Connection timed out.");
 831         else if (m_access_denied_reason.empty())
 832                 m_access_denied_reason = gettext("Connection aborted (protocol error?).");
 833 }
 834
 835 /*
 836         u16 command
 837         u16 number of files requested
 838         for each file {
 839                 u16 length of name
 840                 string name
 841         }
 842 */
 843 void Client::request_media(const std::vector<std::string> &file_requests)
 844 {
 845         std::ostringstream os(std::ios_base::binary);
 846         writeU16(os, TOSERVER_REQUEST_MEDIA);
 847         size_t file_requests_size = file_requests.size();
 848
 849         FATAL_ERROR_IF(file_requests_size > 0xFFFF, "Unsupported number of file requests");
 850
 851         // Packet dynamicly resized
 852         NetworkPacket pkt(TOSERVER_REQUEST_MEDIA, 2 + 0);
 853
 854         pkt << (u16) (file_requests_size & 0xFFFF);
 855
 856         for (const std::string &file_request : file_requests) {
 857                 pkt << file_request;
 858         }
 859
 860         Send(&pkt);
 861
 862         infostream << "Client: Sending media request list to server ("
 863                         << file_requests.size() << " files, packet size "
 864                         << pkt.getSize() << ")" << std::endl;
 865 }
 866
 867 void Client::initLocalMapSaving(const Address &address,
 868                 const std::string &hostname,
 869                 bool is_local_server)
 870 {
 871         if (!g_settings->getBool("enable_local_map_saving") || is_local_server) {
 872                 return;
 873         }
 874
 875         std::string world_path;
 876 #define set_world_path(hostname) \
 877         world_path = porting::path_user \
 878                 + DIR_DELIM + "worlds" \
 879                 + DIR_DELIM + "server_" \
 880                 + hostname + "_" + std::to_string(address.getPort());
 881
 882         set_world_path(hostname);
 883         if (!fs::IsDir(world_path)) {
 884                 std::string hostname_escaped = hostname;
 885                 str_replace(hostname_escaped, ':', '_');
 886                 set_world_path(hostname_escaped);
 887         }
 888 #undef set_world_path
 889         fs::CreateAllDirs(world_path);
 890
 891         m_localdb = new MapDatabaseSQLite3(world_path);
 892         m_localdb->beginSave();
 893         actionstream << "Local map saving started, map will be saved at '" << world_path << "'" << std::endl;
 894 }
 895
 896 void Client::ReceiveAll()
 897 {
 898         NetworkPacket pkt;
 899         u64 start_ms = porting::getTimeMs();
 900         const u64 budget = 100;
 901         for(;;) {
 902                 // Limit time even if there would be huge amounts of data to
 903                 // process
 904                 if (porting::getTimeMs() > start_ms + budget) {
 905                         infostream << "Client::ReceiveAll(): "
 906                                         "Packet processing budget exceeded." << std::endl;
 907                         break;
 908                 }
 909
 910                 pkt.clear();
 911                 try {
 912                         if (!m_con->TryReceive(&pkt))
 913                                 break;
 914                         ProcessData(&pkt);
 915                 } catch (const con::InvalidIncomingDataException &e) {
 916                         infostream << "Client::ReceiveAll(): "
 917                                         "InvalidIncomingDataException: what()="
 918                                          << e.what() << std::endl;
 919                 }
 920         }
 921 }
 922
 923 inline void Client::handleCommand(NetworkPacket* pkt)
 924 {
 925         const ToClientCommandHandler& opHandle = toClientCommandTable[pkt->getCommand()];
 926         (this->*opHandle.handler)(pkt);
 927 }
 928
 929 /*
 930         sender_peer_id given to this shall be quaranteed to be a valid peer
 931 */
 932 void Client::ProcessData(NetworkPacket *pkt)
 933 {
 934         ToClientCommand command = (ToClientCommand) pkt->getCommand();
 935         u32 sender_peer_id = pkt->getPeerId();
 936
 937         //infostream<<"Client: received command="<<command<<std::endl;
 938         m_packetcounter.add((u16)command);
 939         g_profiler->graphAdd("client_received_packets", 1);
 940
 941         /*
 942                 If this check is removed, be sure to change the queue
 943                 system to know the ids
 944         */
 945         if(sender_peer_id != PEER_ID_SERVER) {
 946                 infostream << "Client::ProcessData(): Discarding data not "
 947                         "coming from server: peer_id=" << sender_peer_id << " command=" << pkt->getCommand()
 948                         << std::endl;
 949                 return;
 950         }
 951
 952         // Command must be handled into ToClientCommandHandler
 953         if (command >= TOCLIENT_NUM_MSG_TYPES) {
 954                 infostream << "Client: Ignoring unknown command "
 955                         << command << std::endl;
 956                 return;
 957         }
 958
 959         /*
 960          * Those packets are handled before m_server_ser_ver is set, it's normal
 961          * But we must use the new ToClientConnectionState in the future,
 962          * as a byte mask
 963          */
 964         if(toClientCommandTable[command].state == TOCLIENT_STATE_NOT_CONNECTED) {
 965                 handleCommand(pkt);
 966                 return;
 967         }
 968
 969         if(m_server_ser_ver == SER_FMT_VER_INVALID) {
 970                 infostream << "Client: Server serialization"
 971                                 " format invalid or not initialized."
 972                                 " Skipping incoming command=" << command << std::endl;
 973                 return;
 974         }
 975
 976         /*
 977           Handle runtime commands
 978         */
 979
 980         handleCommand(pkt);
 981 }
 982
 983 void Client::Send(NetworkPacket* pkt)
 984 {
 985         m_con->Send(PEER_ID_SERVER,
 986                 serverCommandFactoryTable[pkt->getCommand()].channel,
 987                 pkt,
 988                 serverCommandFactoryTable[pkt->getCommand()].reliable);
 989 }
 990
 991 // Will fill up 12 + 12 + 4 + 4 + 4 bytes
 992 void writePlayerPos(LocalPlayer *myplayer, ClientMap *clientMap, NetworkPacket *pkt)
 993 {
 994         v3f pf           = myplayer->getPosition() * 100;
 995         v3f sf           = myplayer->getSpeed() * 100;
 996         s32 pitch        = myplayer->getPitch() * 100;
 997         s32 yaw          = myplayer->getYaw() * 100;
 998         u32 keyPressed   = myplayer->control.getKeysPressed();
 999         // scaled by 80, so that pi can fit into a u8
1000         u8 fov           = clientMap->getCameraFov() * 80;
1001         u8 wanted_range  = MYMIN(255,
1002                         std::ceil(clientMap->getControl().wanted_range / MAP_BLOCKSIZE));
1003
1004         v3s32 position(pf.X, pf.Y, pf.Z);
1005         v3s32 speed(sf.X, sf.Y, sf.Z);
1006
1007         /*
1008                 Format:
1009                 [0] v3s32 position*100
1010                 [12] v3s32 speed*100
1011                 [12+12] s32 pitch*100
1012                 [12+12+4] s32 yaw*100
1013                 [12+12+4+4] u32 keyPressed
1014                 [12+12+4+4+4] u8 fov*80
1015                 [12+12+4+4+4+1] u8 ceil(wanted_range / MAP_BLOCKSIZE)
1016         */
1017         *pkt << position << speed << pitch << yaw << keyPressed;
1018         *pkt << fov << wanted_range;
1019 }
1020
1021 void Client::interact(InteractAction action, const PointedThing& pointed)
1022 {
1023         if(m_state != LC_Ready) {
1024                 errorstream << "Client::interact() "
1025                                 "Canceled (not connected)"
1026                                 << std::endl;
1027                 return;
1028         }
1029
1030         LocalPlayer *myplayer = m_env.getLocalPlayer();
1031         if (myplayer == NULL)
1032                 return;
1033
1034         /*
1035                 [0] u16 command
1036                 [2] u8 action
1037                 [3] u16 item
1038                 [5] u32 length of the next item (plen)
1039                 [9] serialized PointedThing
1040                 [9 + plen] player position information
1041         */
1042
1043         NetworkPacket pkt(TOSERVER_INTERACT, 1 + 2 + 0);
1044
1045         pkt << (u8)action;
1046         pkt << myplayer->getWieldIndex();
1047
1048         std::ostringstream tmp_os(std::ios::binary);
1049         pointed.serialize(tmp_os);
1050
1051         pkt.putLongString(tmp_os.str());
1052
1053         writePlayerPos(myplayer, &m_env.getClientMap(), &pkt);
1054
1055         Send(&pkt);
1056 }
1057
1058 void Client::deleteAuthData()
1059 {
1060         if (!m_auth_data)
1061                 return;
1062
1063         switch (m_chosen_auth_mech) {
1064                 case AUTH_MECHANISM_FIRST_SRP:
1065                         break;
1066                 case AUTH_MECHANISM_SRP:
1067                 case AUTH_MECHANISM_LEGACY_PASSWORD:
1068                         srp_user_delete((SRPUser *) m_auth_data);
1069                         m_auth_data = NULL;
1070                         break;
1071                 case AUTH_MECHANISM_NONE:
1072                         break;
1073         }
1074         m_chosen_auth_mech = AUTH_MECHANISM_NONE;
1075 }
1076
1077
1078 AuthMechanism Client::choseAuthMech(const u32 mechs)
1079 {
1080         if (mechs & AUTH_MECHANISM_SRP)
1081                 return AUTH_MECHANISM_SRP;
1082
1083         if (mechs & AUTH_MECHANISM_FIRST_SRP)
1084                 return AUTH_MECHANISM_FIRST_SRP;
1085
1086         if (mechs & AUTH_MECHANISM_LEGACY_PASSWORD)
1087                 return AUTH_MECHANISM_LEGACY_PASSWORD;
1088
1089         return AUTH_MECHANISM_NONE;
1090 }
1091
1092 void Client::sendInit(const std::string &playerName)
1093 {
1094         NetworkPacket pkt(TOSERVER_INIT, 1 + 2 + 2 + (1 + playerName.size()));
1095
1096         // we don't support network compression yet
1097         u16 supp_comp_modes = NETPROTO_COMPRESSION_NONE;
1098
1099         pkt << (u8) SER_FMT_VER_HIGHEST_READ << (u16) supp_comp_modes;
1100         pkt << (u16) CLIENT_PROTOCOL_VERSION_MIN << (u16) CLIENT_PROTOCOL_VERSION_MAX;
1101         pkt << playerName;
1102
1103         Send(&pkt);
1104 }
1105
1106 void Client::startAuth(AuthMechanism chosen_auth_mechanism)
1107 {
1108         m_chosen_auth_mech = chosen_auth_mechanism;
1109
1110         switch (chosen_auth_mechanism) {
1111                 case AUTH_MECHANISM_FIRST_SRP: {
1112                         // send srp verifier to server
1113                         std::string verifier;
1114                         std::string salt;
1115                         generate_srp_verifier_and_salt(getPlayerName(), m_password,
1116                                 &verifier, &salt);
1117
1118                         NetworkPacket resp_pkt(TOSERVER_FIRST_SRP, 0);
1119                         resp_pkt << salt << verifier << (u8)((m_password.empty()) ? 1 : 0);
1120
1121                         Send(&resp_pkt);
1122                         break;
1123                 }
1124                 case AUTH_MECHANISM_SRP:
1125                 case AUTH_MECHANISM_LEGACY_PASSWORD: {
1126                         u8 based_on = 1;
1127
1128                         if (chosen_auth_mechanism == AUTH_MECHANISM_LEGACY_PASSWORD) {
1129                                 m_password = translate_password(getPlayerName(), m_password);
1130                                 based_on = 0;
1131                         }
1132
1133                         std::string playername_u = lowercase(getPlayerName());
1134                         m_auth_data = srp_user_new(SRP_SHA256, SRP_NG_2048,
1135                                 getPlayerName().c_str(), playername_u.c_str(),
1136                                 (const unsigned char *) m_password.c_str(),
1137                                 m_password.length(), NULL, NULL);
1138                         char *bytes_A = 0;
1139                         size_t len_A = 0;
1140                         SRP_Result res = srp_user_start_authentication(
1141                                 (struct SRPUser *) m_auth_data, NULL, NULL, 0,
1142                                 (unsigned char **) &bytes_A, &len_A);
1143                         FATAL_ERROR_IF(res != SRP_OK, "Creating local SRP user failed.");
1144
1145                         NetworkPacket resp_pkt(TOSERVER_SRP_BYTES_A, 0);
1146                         resp_pkt << std::string(bytes_A, len_A) << based_on;
1147                         Send(&resp_pkt);
1148                         break;
1149                 }
1150                 case AUTH_MECHANISM_NONE:
1151                         break; // not handled in this method
1152         }
1153 }
1154
1155 void Client::sendDeletedBlocks(std::vector<v3s16> &blocks)
1156 {
1157         NetworkPacket pkt(TOSERVER_DELETEDBLOCKS, 1 + sizeof(v3s16) * blocks.size());
1158
1159         pkt << (u8) blocks.size();
1160
1161         for (const v3s16 &block : blocks) {
1162                 pkt << block;
1163         }
1164
1165         Send(&pkt);
1166 }
1167
1168 void Client::sendGotBlocks(const std::vector<v3s16> &blocks)
1169 {
1170         NetworkPacket pkt(TOSERVER_GOTBLOCKS, 1 + 6 * blocks.size());
1171         pkt << (u8) blocks.size();
1172         for (const v3s16 &block : blocks)
1173                 pkt << block;
1174
1175         Send(&pkt);
1176 }
1177
1178 void Client::sendRemovedSounds(std::vector<s32> &soundList)
1179 {
1180         size_t server_ids = soundList.size();
1181         assert(server_ids <= 0xFFFF);
1182
1183         NetworkPacket pkt(TOSERVER_REMOVED_SOUNDS, 2 + server_ids * 4);
1184
1185         pkt << (u16) (server_ids & 0xFFFF);
1186
1187         for (s32 sound_id : soundList)
1188                 pkt << sound_id;
1189
1190         Send(&pkt);
1191 }
1192
1193 void Client::sendNodemetaFields(v3s16 p, const std::string &formname,
1194                 const StringMap &fields)
1195 {
1196         size_t fields_size = fields.size();
1197
1198         FATAL_ERROR_IF(fields_size > 0xFFFF, "Unsupported number of nodemeta fields");
1199
1200         NetworkPacket pkt(TOSERVER_NODEMETA_FIELDS, 0);
1201
1202         pkt << p << formname << (u16) (fields_size & 0xFFFF);
1203
1204         StringMap::const_iterator it;
1205         for (it = fields.begin(); it != fields.end(); ++it) {
1206                 const std::string &name = it->first;
1207                 const std::string &value = it->second;
1208                 pkt << name;
1209                 pkt.putLongString(value);
1210         }
1211
1212         Send(&pkt);
1213 }
1214
1215 void Client::sendInventoryFields(const std::string &formname,
1216                 const StringMap &fields)
1217 {
1218         size_t fields_size = fields.size();
1219         FATAL_ERROR_IF(fields_size > 0xFFFF, "Unsupported number of inventory fields");
1220
1221         NetworkPacket pkt(TOSERVER_INVENTORY_FIELDS, 0);
1222         pkt << formname << (u16) (fields_size & 0xFFFF);
1223
1224         StringMap::const_iterator it;
1225         for (it = fields.begin(); it != fields.end(); ++it) {
1226                 const std::string &name  = it->first;
1227                 const std::string &value = it->second;
1228                 pkt << name;
1229                 pkt.putLongString(value);
1230         }
1231
1232         Send(&pkt);
1233 }
1234
1235 void Client::sendInventoryAction(InventoryAction *a)
1236 {
1237         std::ostringstream os(std::ios_base::binary);
1238
1239         a->serialize(os);
1240
1241         // Make data buffer
1242         std::string s = os.str();
1243
1244         NetworkPacket pkt(TOSERVER_INVENTORY_ACTION, s.size());
1245         pkt.putRawString(s.c_str(),s.size());
1246
1247         Send(&pkt);
1248 }
1249
1250 bool Client::canSendChatMessage() const
1251 {
1252         u32 now = time(NULL);
1253         float time_passed = now - m_last_chat_message_sent;
1254
1255         float virt_chat_message_allowance = m_chat_message_allowance + time_passed *
1256                         (CLIENT_CHAT_MESSAGE_LIMIT_PER_10S / 8.0f);
1257
1258         if (virt_chat_message_allowance < 1.0f)
1259                 return false;
1260
1261         return true;
1262 }
1263
1264 void Client::sendChatMessage(const std::wstring &message)
1265 {
1266         const s16 max_queue_size = g_settings->getS16("max_out_chat_queue_size");
1267         if (canSendChatMessage()) {
1268                 u32 now = time(NULL);
1269                 float time_passed = now - m_last_chat_message_sent;
1270                 m_last_chat_message_sent = now;
1271
1272                 m_chat_message_allowance += time_passed * (CLIENT_CHAT_MESSAGE_LIMIT_PER_10S / 8.0f);
1273                 if (m_chat_message_allowance > CLIENT_CHAT_MESSAGE_LIMIT_PER_10S)
1274                         m_chat_message_allowance = CLIENT_CHAT_MESSAGE_LIMIT_PER_10S;
1275
1276                 m_chat_message_allowance -= 1.0f;
1277
1278                 NetworkPacket pkt(TOSERVER_CHAT_MESSAGE, 2 + message.size() * sizeof(u16));
1279
1280                 pkt << message;
1281
1282                 Send(&pkt);
1283         } else if (m_out_chat_queue.size() < (u16) max_queue_size || max_queue_size < 0) {
1284                 m_out_chat_queue.push(message);
1285         } else {
1286                 infostream << "Could not queue chat message because maximum out chat queue size ("
1287                                 << max_queue_size << ") is reached." << std::endl;
1288         }
1289 }
1290
1291 void Client::clearOutChatQueue()
1292 {
1293         m_out_chat_queue = std::queue<std::wstring>();
1294 }
1295
1296 void Client::sendChangePassword(const std::string &oldpassword,
1297         const std::string &newpassword)
1298 {
1299         LocalPlayer *player = m_env.getLocalPlayer();
1300         if (player == NULL)
1301                 return;
1302
1303         // get into sudo mode and then send new password to server
1304         m_password = oldpassword;
1305         m_new_password = newpassword;
1306         startAuth(choseAuthMech(m_sudo_auth_methods));
1307 }
1308
1309
1310 void Client::sendDamage(u16 damage)
1311 {
1312         NetworkPacket pkt(TOSERVER_DAMAGE, sizeof(u16));
1313         pkt << damage;
1314         Send(&pkt);
1315 }
1316
1317 void Client::sendRespawn()
1318 {
1319         NetworkPacket pkt(TOSERVER_RESPAWN, 0);
1320         Send(&pkt);
1321 }
1322
1323 void Client::sendReady()
1324 {
1325         NetworkPacket pkt(TOSERVER_CLIENT_READY,
1326                         1 + 1 + 1 + 1 + 2 + sizeof(char) * strlen(g_version_hash) + 2);
1327
1328         pkt << (u8) VERSION_MAJOR << (u8) VERSION_MINOR << (u8) VERSION_PATCH
1329                 << (u8) 0 << (u16) strlen(g_version_hash);
1330
1331         pkt.putRawString(g_version_hash, (u16) strlen(g_version_hash));
1332         pkt << (u16)FORMSPEC_API_VERSION;
1333         Send(&pkt);
1334 }
1335
1336 void Client::sendPlayerPos()
1337 {
1338         LocalPlayer *player = m_env.getLocalPlayer();
1339         if (!player)
1340                 return;
1341
1342         // Save bandwidth by only updating position when
1343         // player is not dead and something changed
1344
1345         if (m_activeobjects_received && player->isDead())
1346                 return;
1347
1348         ClientMap &map = m_env.getClientMap();
1349         u8 camera_fov   = map.getCameraFov();
1350         u8 wanted_range = map.getControl().wanted_range;
1351
1352         u32 keyPressed = player->control.getKeysPressed();
1353
1354         if (
1355                         player->last_position     == player->getPosition() &&
1356                         player->last_speed        == player->getSpeed()    &&
1357                         player->last_pitch        == player->getPitch()    &&
1358                         player->last_yaw          == player->getYaw()      &&
1359                         player->last_keyPressed   == keyPressed            &&
1360                         player->last_camera_fov   == camera_fov            &&
1361                         player->last_wanted_range == wanted_range)
1362                 return;
1363
1364         player->last_position     = player->getPosition();
1365         player->last_speed        = player->getSpeed();
1366         player->last_pitch        = player->getPitch();
1367         player->last_yaw          = player->getYaw();
1368         player->last_keyPressed   = keyPressed;
1369         player->last_camera_fov   = camera_fov;
1370         player->last_wanted_range = wanted_range;
1371
1372         NetworkPacket pkt(TOSERVER_PLAYERPOS, 12 + 12 + 4 + 4 + 4 + 1 + 1);
1373
1374         writePlayerPos(player, &map, &pkt);
1375
1376         Send(&pkt);
1377 }
1378
1379 void Client::sendHaveMedia(const std::vector<u32> &tokens)
1380 {
1381         NetworkPacket pkt(TOSERVER_HAVE_MEDIA, 1 + tokens.size() * 4);
1382
1383         sanity_check(tokens.size() < 256);
1384
1385         pkt << static_cast<u8>(tokens.size());
1386         for (u32 token : tokens)
1387                 pkt << token;
1388
1389         Send(&pkt);
1390 }
1391
1392 void Client::removeNode(v3s16 p)
1393 {
1394         std::map<v3s16, MapBlock*> modified_blocks;
1395
1396         try {
1397                 m_env.getMap().removeNodeAndUpdate(p, modified_blocks);
1398         }
1399         catch(InvalidPositionException &e) {
1400         }
1401
1402         for (const auto &modified_block : modified_blocks) {
1403                 addUpdateMeshTaskWithEdge(modified_block.first, false, true);
1404         }
1405 }
1406
1407 /**
1408  * Helper function for Client Side Modding
1409  * CSM restrictions are applied there, this should not be used for core engine
1410  * @param p
1411  * @param is_valid_position
1412  * @return
1413  */
1414 MapNode Client::CSMGetNode(v3s16 p, bool *is_valid_position)
1415 {
1416         if (checkCSMRestrictionFlag(CSMRestrictionFlags::CSM_RF_LOOKUP_NODES)) {
1417                 v3s16 ppos = floatToInt(m_env.getLocalPlayer()->getPosition(), BS);
1418                 if ((u32) ppos.getDistanceFrom(p) > m_csm_restriction_noderange) {
1419                         *is_valid_position = false;
1420                         return {};
1421                 }
1422         }
1423         return m_env.getMap().getNode(p, is_valid_position);
1424 }
1425
1426 int Client::CSMClampRadius(v3s16 pos, int radius)
1427 {
1428         if (!checkCSMRestrictionFlag(CSMRestrictionFlags::CSM_RF_LOOKUP_NODES))
1429                 return radius;
1430         // This is approximate and will cause some allowed nodes to be excluded
1431         v3s16 ppos = floatToInt(m_env.getLocalPlayer()->getPosition(), BS);
1432         u32 distance = ppos.getDistanceFrom(pos);
1433         if (distance >= m_csm_restriction_noderange)
1434                 return 0;
1435         return std::min<int>(radius, m_csm_restriction_noderange - distance);
1436 }
1437
1438 v3s16 Client::CSMClampPos(v3s16 pos)
1439 {
1440         if (!checkCSMRestrictionFlag(CSMRestrictionFlags::CSM_RF_LOOKUP_NODES))
1441                 return pos;
1442         v3s16 ppos = floatToInt(m_env.getLocalPlayer()->getPosition(), BS);
1443         const int range = m_csm_restriction_noderange;
1444         return v3s16(
1445                 core::clamp<int>(pos.X, (int)ppos.X - range, (int)ppos.X + range),
1446                 core::clamp<int>(pos.Y, (int)ppos.Y - range, (int)ppos.Y + range),
1447                 core::clamp<int>(pos.Z, (int)ppos.Z - range, (int)ppos.Z + range)
1448         );
1449 }
1450
1451 void Client::addNode(v3s16 p, MapNode n, bool remove_metadata)
1452 {
1453         //TimeTaker timer1("Client::addNode()");
1454
1455         std::map<v3s16, MapBlock*> modified_blocks;
1456
1457         try {
1458                 //TimeTaker timer3("Client::addNode(): addNodeAndUpdate");
1459                 m_env.getMap().addNodeAndUpdate(p, n, modified_blocks, remove_metadata);
1460         }
1461         catch(InvalidPositionException &e) {
1462         }
1463
1464         for (const auto &modified_block : modified_blocks) {
1465                 addUpdateMeshTaskWithEdge(modified_block.first, false, true);
1466         }
1467 }
1468
1469 void Client::setPlayerControl(PlayerControl &control)
1470 {
1471         LocalPlayer *player = m_env.getLocalPlayer();
1472         assert(player);
1473         player->control = control;
1474 }
1475
1476 void Client::setPlayerItem(u16 item)
1477 {
1478         m_env.getLocalPlayer()->setWieldIndex(item);
1479         m_update_wielded_item = true;
1480
1481         NetworkPacket pkt(TOSERVER_PLAYERITEM, 2);
1482         pkt << item;
1483         Send(&pkt);
1484 }
1485
1486 // Returns true once after the inventory of the local player
1487 // has been updated from the server.
1488 bool Client::updateWieldedItem()
1489 {
1490         if (!m_update_wielded_item)
1491                 return false;
1492
1493         m_update_wielded_item = false;
1494
1495         LocalPlayer *player = m_env.getLocalPlayer();
1496         assert(player);
1497         if (auto *list = player->inventory.getList("main"))
1498                 list->setModified(false);
1499         if (auto *list = player->inventory.getList("hand"))
1500                 list->setModified(false);
1501
1502         return true;
1503 }
1504
1505 scene::ISceneManager* Client::getSceneManager()
1506 {
1507         return m_rendering_engine->get_scene_manager();
1508 }
1509
1510 Inventory* Client::getInventory(const InventoryLocation &loc)
1511 {
1512         switch(loc.type){
1513         case InventoryLocation::UNDEFINED:
1514         {}
1515         break;
1516         case InventoryLocation::CURRENT_PLAYER:
1517         {
1518                 LocalPlayer *player = m_env.getLocalPlayer();
1519                 assert(player);
1520                 return &player->inventory;
1521         }
1522         break;
1523         case InventoryLocation::PLAYER:
1524         {
1525                 // Check if we are working with local player inventory
1526                 LocalPlayer *player = m_env.getLocalPlayer();
1527                 if (!player || strcmp(player->getName(), loc.name.c_str()) != 0)
1528                         return NULL;
1529                 return &player->inventory;
1530         }
1531         break;
1532         case InventoryLocation::NODEMETA:
1533         {
1534                 NodeMetadata *meta = m_env.getMap().getNodeMetadata(loc.p);
1535                 if(!meta)
1536                         return NULL;
1537                 return meta->getInventory();
1538         }
1539         break;
1540         case InventoryLocation::DETACHED:
1541         {
1542                 if (m_detached_inventories.count(loc.name) == 0)
1543                         return NULL;
1544                 return m_detached_inventories[loc.name];
1545         }
1546         break;
1547         default:
1548                 FATAL_ERROR("Invalid inventory location type.");
1549                 break;
1550         }
1551         return NULL;
1552 }
1553
1554 void Client::inventoryAction(InventoryAction *a)
1555 {
1556         /*
1557                 Send it to the server
1558         */
1559         sendInventoryAction(a);
1560
1561         /*
1562                 Predict some local inventory changes
1563         */
1564         a->clientApply(this, this);
1565
1566         // Remove it
1567         delete a;
1568 }
1569
1570 float Client::getAnimationTime()
1571 {
1572         return m_animation_time;
1573 }
1574
1575 int Client::getCrackLevel()
1576 {
1577         return m_crack_level;
1578 }
1579
1580 v3s16 Client::getCrackPos()
1581 {
1582         return m_crack_pos;
1583 }
1584
1585 void Client::setCrack(int level, v3s16 pos)
1586 {
1587         int old_crack_level = m_crack_level;
1588         v3s16 old_crack_pos = m_crack_pos;
1589
1590         m_crack_level = level;
1591         m_crack_pos = pos;
1592
1593         if(old_crack_level >= 0 && (level < 0 || pos != old_crack_pos))
1594         {
1595                 // remove old crack
1596                 addUpdateMeshTaskForNode(old_crack_pos, false, true);
1597         }
1598         if(level >= 0 && (old_crack_level < 0 || pos != old_crack_pos))
1599         {
1600                 // add new crack
1601                 addUpdateMeshTaskForNode(pos, false, true);
1602         }
1603 }
1604
1605 u16 Client::getHP()
1606 {
1607         LocalPlayer *player = m_env.getLocalPlayer();
1608         assert(player);
1609         return player->hp;
1610 }
1611
1612 bool Client::getChatMessage(std::wstring &res)
1613 {
1614         if (m_chat_queue.empty())
1615                 return false;
1616
1617         ChatMessage *chatMessage = m_chat_queue.front();
1618         m_chat_queue.pop();
1619
1620         res = L"";
1621
1622         switch (chatMessage->type) {
1623                 case CHATMESSAGE_TYPE_RAW:
1624                 case CHATMESSAGE_TYPE_ANNOUNCE:
1625                 case CHATMESSAGE_TYPE_SYSTEM:
1626                         res = chatMessage->message;
1627                         break;
1628                 case CHATMESSAGE_TYPE_NORMAL: {
1629                         if (!chatMessage->sender.empty())
1630                                 res = L"<" + chatMessage->sender + L"> " + chatMessage->message;
1631                         else
1632                                 res = chatMessage->message;
1633                         break;
1634                 }
1635                 default:
1636                         break;
1637         }
1638
1639         delete chatMessage;
1640         return true;
1641 }
1642
1643 void Client::typeChatMessage(const std::wstring &message)
1644 {
1645         // Discard empty line
1646         if (message.empty())
1647                 return;
1648
1649         // If message was consumed by script API, don't send it to server
1650         if (m_mods_loaded && m_script->on_sending_message(wide_to_utf8(message)))
1651                 return;
1652
1653         // Send to others
1654         sendChatMessage(message);
1655 }
1656
1657 void Client::addUpdateMeshTask(v3s16 p, bool ack_to_server, bool urgent)
1658 {
1659         // Check if the block exists to begin with. In the case when a non-existing
1660         // neighbor is automatically added, it may not. In that case we don't want
1661         // to tell the mesh update thread about it.
1662         MapBlock *b = m_env.getMap().getBlockNoCreateNoEx(p);
1663         if (b == NULL)
1664                 return;
1665
1666         m_mesh_update_manager.updateBlock(&m_env.getMap(), p, ack_to_server, urgent);
1667 }
1668
1669 void Client::addUpdateMeshTaskWithEdge(v3s16 blockpos, bool ack_to_server, bool urgent)
1670 {
1671         m_mesh_update_manager.updateBlock(&m_env.getMap(), blockpos, ack_to_server, urgent, true);
1672 }
1673
1674 void Client::addUpdateMeshTaskForNode(v3s16 nodepos, bool ack_to_server, bool urgent)
1675 {
1676         {
1677                 v3s16 p = nodepos;
1678                 infostream<<"Client::addUpdateMeshTaskForNode(): "
1679                                 <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
1680                                 <<std::endl;
1681         }
1682
1683         v3s16 blockpos = getNodeBlockPos(nodepos);
1684         v3s16 blockpos_relative = blockpos * MAP_BLOCKSIZE;
1685         m_mesh_update_manager.updateBlock(&m_env.getMap(), blockpos, ack_to_server, urgent, false);
1686         // Leading edge
1687         if (nodepos.X == blockpos_relative.X)
1688                 addUpdateMeshTask(blockpos + v3s16(-1, 0, 0), false, urgent);
1689         if (nodepos.Y == blockpos_relative.Y)
1690                 addUpdateMeshTask(blockpos + v3s16(0, -1, 0), false, urgent);
1691         if (nodepos.Z == blockpos_relative.Z)
1692                 addUpdateMeshTask(blockpos + v3s16(0, 0, -1), false, urgent);
1693 }
1694
1695 ClientEvent *Client::getClientEvent()
1696 {
1697         FATAL_ERROR_IF(m_client_event_queue.empty(),
1698                         "Cannot getClientEvent, queue is empty.");
1699
1700         ClientEvent *event = m_client_event_queue.front();
1701         m_client_event_queue.pop();
1702         return event;
1703 }
1704
1705 const Address Client::getServerAddress()
1706 {
1707         return m_con->GetPeerAddress(PEER_ID_SERVER);
1708 }
1709
1710 float Client::mediaReceiveProgress()
1711 {
1712         if (m_media_downloader)
1713                 return m_media_downloader->getProgress();
1714
1715         return 1.0; // downloader only exists when not yet done
1716 }
1717
1718 struct TextureUpdateArgs {
1719         gui::IGUIEnvironment *guienv;
1720         u64 last_time_ms;
1721         u16 last_percent;
1722         const wchar_t* text_base;
1723         ITextureSource *tsrc;
1724 };
1725
1726 void Client::showUpdateProgressTexture(void *args, u32 progress, u32 max_progress)
1727 {
1728                 TextureUpdateArgs* targs = (TextureUpdateArgs*) args;
1729                 u16 cur_percent = ceil(progress / (double) max_progress * 100.);
1730
1731                 // update the loading menu -- if necessary
1732                 bool do_draw = false;
1733                 u64 time_ms = targs->last_time_ms;
1734                 if (cur_percent != targs->last_percent) {
1735                         targs->last_percent = cur_percent;
1736                         time_ms = porting::getTimeMs();
1737                         // only draw when the user will notice something:
1738                         do_draw = (time_ms - targs->last_time_ms > 100);
1739                 }
1740
1741                 if (do_draw) {
1742                         targs->last_time_ms = time_ms;
1743                         std::wostringstream strm;
1744                         strm << targs->text_base << L" " << targs->last_percent << L"%...";
1745                         m_rendering_engine->draw_load_screen(strm.str(), targs->guienv, targs->tsrc, 0,
1746                                 72 + (u16) ((18. / 100.) * (double) targs->last_percent), true);
1747                 }
1748 }
1749
1750 void Client::afterContentReceived()
1751 {
1752         infostream<<"Client::afterContentReceived() started"<<std::endl;
1753         assert(m_itemdef_received); // pre-condition
1754         assert(m_nodedef_received); // pre-condition
1755         assert(mediaReceived()); // pre-condition
1756
1757         const wchar_t* text = wgettext("Loading textures...");
1758
1759         // Clear cached pre-scaled 2D GUI images, as this cache
1760         // might have images with the same name but different
1761         // content from previous sessions.
1762         guiScalingCacheClear();
1763
1764         // Rebuild inherited images and recreate textures
1765         infostream<<"- Rebuilding images and textures"<<std::endl;
1766         m_rendering_engine->draw_load_screen(text, guienv, m_tsrc, 0, 70);
1767         m_tsrc->rebuildImagesAndTextures();
1768         delete[] text;
1769
1770         // Rebuild shaders
1771         infostream<<"- Rebuilding shaders"<<std::endl;
1772         text = wgettext("Rebuilding shaders...");
1773         m_rendering_engine->draw_load_screen(text, guienv, m_tsrc, 0, 71);
1774         m_shsrc->rebuildShaders();
1775         delete[] text;
1776
1777         // Update node aliases
1778         infostream<<"- Updating node aliases"<<std::endl;
1779         text = wgettext("Initializing nodes...");
1780         m_rendering_engine->draw_load_screen(text, guienv, m_tsrc, 0, 72);
1781         m_nodedef->updateAliases(m_itemdef);
1782         for (const auto &path : getTextureDirs()) {
1783                 TextureOverrideSource override_source(path + DIR_DELIM + "override.txt");
1784                 m_nodedef->applyTextureOverrides(override_source.getNodeTileOverrides());
1785                 m_itemdef->applyTextureOverrides(override_source.getItemTextureOverrides());
1786         }
1787         m_nodedef->setNodeRegistrationStatus(true);
1788         m_nodedef->runNodeResolveCallbacks();
1789         delete[] text;
1790
1791         // Update node textures and assign shaders to each tile
1792         infostream<<"- Updating node textures"<<std::endl;
1793         TextureUpdateArgs tu_args;
1794         tu_args.guienv = guienv;
1795         tu_args.last_time_ms = porting::getTimeMs();
1796         tu_args.last_percent = 0;
1797         tu_args.text_base = wgettext("Initializing nodes");
1798         tu_args.tsrc = m_tsrc;
1799         m_nodedef->updateTextures(this, &tu_args);
1800         delete[] tu_args.text_base;
1801
1802         // Start mesh update thread after setting up content definitions
1803         infostream<<"- Starting mesh update thread"<<std::endl;
1804         m_mesh_update_manager.start();
1805
1806         m_state = LC_Ready;
1807         sendReady();
1808
1809         if (m_mods_loaded)
1810                 m_script->on_client_ready(m_env.getLocalPlayer());
1811
1812         text = wgettext("Done!");
1813         m_rendering_engine->draw_load_screen(text, guienv, m_tsrc, 0, 100);
1814         infostream<<"Client::afterContentReceived() done"<<std::endl;
1815         delete[] text;
1816 }
1817
1818 float Client::getRTT()
1819 {
1820         return m_con->getPeerStat(PEER_ID_SERVER,con::AVG_RTT);
1821 }
1822
1823 float Client::getCurRate()
1824 {
1825         return (m_con->getLocalStat(con::CUR_INC_RATE) +
1826                         m_con->getLocalStat(con::CUR_DL_RATE));
1827 }
1828
1829 void Client::makeScreenshot()
1830 {
1831         irr::video::IVideoDriver *driver = m_rendering_engine->get_video_driver();
1832         irr::video::IImage* const raw_image = driver->createScreenShot();
1833
1834         if (!raw_image)
1835                 return;
1836
1837         const struct tm tm = mt_localtime();
1838
1839         char timetstamp_c[64];
1840         strftime(timetstamp_c, sizeof(timetstamp_c), "%Y%m%d_%H%M%S", &tm);
1841
1842         std::string screenshot_dir;
1843
1844         if (fs::IsPathAbsolute(g_settings->get("screenshot_path")))
1845                 screenshot_dir = g_settings->get("screenshot_path");
1846         else
1847                 screenshot_dir = porting::path_user + DIR_DELIM + g_settings->get("screenshot_path");
1848
1849         std::string filename_base = screenshot_dir
1850                         + DIR_DELIM
1851                         + std::string("screenshot_")
1852                         + std::string(timetstamp_c);
1853         std::string filename_ext = "." + g_settings->get("screenshot_format");
1854         std::string filename;
1855
1856         // Create the directory if it doesn't already exist.
1857         // Otherwise, saving the screenshot would fail.
1858         fs::CreateDir(screenshot_dir);
1859
1860         u32 quality = (u32)g_settings->getS32("screenshot_quality");
1861         quality = MYMIN(MYMAX(quality, 0), 100) / 100.0 * 255;
1862
1863         // Try to find a unique filename
1864         unsigned serial = 0;
1865
1866         while (serial < SCREENSHOT_MAX_SERIAL_TRIES) {
1867                 filename = filename_base + (serial > 0 ? ("_" + itos(serial)) : "") + filename_ext;
1868                 std::ifstream tmp(filename.c_str());
1869                 if (!tmp.good())
1870                         break;  // File did not apparently exist, we'll go with it
1871                 serial++;
1872         }
1873
1874         if (serial == SCREENSHOT_MAX_SERIAL_TRIES) {
1875                 infostream << "Could not find suitable filename for screenshot" << std::endl;
1876         } else {
1877                 irr::video::IImage* const image =
1878                                 driver->createImage(video::ECF_R8G8B8, raw_image->getDimension());
1879
1880                 if (image) {
1881                         raw_image->copyTo(image);
1882
1883                         std::ostringstream sstr;
1884                         if (driver->writeImageToFile(image, filename.c_str(), quality)) {
1885                                 sstr << "Saved screenshot to '" << filename << "'";
1886                         } else {
1887                                 sstr << "Failed to save screenshot '" << filename << "'";
1888                         }
1889                         pushToChatQueue(new ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
1890                                         utf8_to_wide(sstr.str())));
1891                         infostream << sstr.str() << std::endl;
1892                         image->drop();
1893                 }
1894         }
1895
1896         raw_image->drop();
1897 }
1898
1899 bool Client::shouldShowMinimap() const
1900 {
1901         return !m_minimap_disabled_by_server;
1902 }
1903
1904 void Client::pushToEventQueue(ClientEvent *event)
1905 {
1906         m_client_event_queue.push(event);
1907 }
1908
1909 void Client::showMinimap(const bool show)
1910 {
1911         m_game_ui->showMinimap(show);
1912 }
1913
1914 // IGameDef interface
1915 // Under envlock
1916 IItemDefManager* Client::getItemDefManager()
1917 {
1918         return m_itemdef;
1919 }
1920 const NodeDefManager* Client::getNodeDefManager()
1921 {
1922         return m_nodedef;
1923 }
1924 ICraftDefManager* Client::getCraftDefManager()
1925 {
1926         return NULL;
1927         //return m_craftdef;
1928 }
1929 ITextureSource* Client::getTextureSource()
1930 {
1931         return m_tsrc;
1932 }
1933 IWritableShaderSource* Client::getShaderSource()
1934 {
1935         return m_shsrc;
1936 }
1937
1938 u16 Client::allocateUnknownNodeId(const std::string &name)
1939 {
1940         errorstream << "Client::allocateUnknownNodeId(): "
1941                         << "Client cannot allocate node IDs" << std::endl;
1942         FATAL_ERROR("Client allocated unknown node");
1943
1944         return CONTENT_IGNORE;
1945 }
1946 ISoundManager* Client::getSoundManager()
1947 {
1948         return m_sound;
1949 }
1950 MtEventManager* Client::getEventManager()
1951 {
1952         return m_event;
1953 }
1954
1955 ParticleManager* Client::getParticleManager()
1956 {
1957         return &m_particle_manager;
1958 }
1959
1960 scene::IAnimatedMesh* Client::getMesh(const std::string &filename, bool cache)
1961 {
1962         StringMap::const_iterator it = m_mesh_data.find(filename);
1963         if (it == m_mesh_data.end()) {
1964                 errorstream << "Client::getMesh(): Mesh not found: \"" << filename
1965                         << "\"" << std::endl;
1966                 return NULL;
1967         }
1968         const std::string &data    = it->second;
1969
1970         // Create the mesh, remove it from cache and return it
1971         // This allows unique vertex colors and other properties for each instance
1972         io::IReadFile *rfile = m_rendering_engine->get_filesystem()->createMemoryReadFile(
1973                         data.c_str(), data.size(), filename.c_str());
1974         FATAL_ERROR_IF(!rfile, "Could not create/open RAM file");
1975
1976         scene::IAnimatedMesh *mesh = m_rendering_engine->get_scene_manager()->getMesh(rfile);
1977         rfile->drop();
1978         if (!mesh)
1979                 return nullptr;
1980         mesh->grab();
1981         if (!cache)
1982                 m_rendering_engine->removeMesh(mesh);
1983         return mesh;
1984 }
1985
1986 const std::string* Client::getModFile(std::string filename)
1987 {
1988         // strip dir delimiter from beginning of path
1989         auto pos = filename.find_first_of(':');
1990         if (pos == std::string::npos)
1991                 return nullptr;
1992         pos++;
1993         auto pos2 = filename.find_first_not_of('/', pos);
1994         if (pos2 > pos)
1995                 filename.erase(pos, pos2 - pos);
1996
1997         StringMap::const_iterator it = m_mod_vfs.find(filename);
1998         if (it == m_mod_vfs.end())
1999                 return nullptr;
2000         return &it->second;
2001 }
2002
2003 /*
2004  * Mod channels
2005  */
2006
2007 bool Client::joinModChannel(const std::string &channel)
2008 {
2009         if (m_modchannel_mgr->channelRegistered(channel))
2010                 return false;
2011
2012         NetworkPacket pkt(TOSERVER_MODCHANNEL_JOIN, 2 + channel.size());
2013         pkt << channel;
2014         Send(&pkt);
2015
2016         m_modchannel_mgr->joinChannel(channel, 0);
2017         return true;
2018 }
2019
2020 bool Client::leaveModChannel(const std::string &channel)
2021 {
2022         if (!m_modchannel_mgr->channelRegistered(channel))
2023                 return false;
2024
2025         NetworkPacket pkt(TOSERVER_MODCHANNEL_LEAVE, 2 + channel.size());
2026         pkt << channel;
2027         Send(&pkt);
2028
2029         m_modchannel_mgr->leaveChannel(channel, 0);
2030         return true;
2031 }
2032
2033 bool Client::sendModChannelMessage(const std::string &channel, const std::string &message)
2034 {
2035         if (!m_modchannel_mgr->canWriteOnChannel(channel))
2036                 return false;
2037
2038         if (message.size() > STRING_MAX_LEN) {
2039                 warningstream << "ModChannel message too long, dropping before sending "
2040                                 << " (" << message.size() << " > " << STRING_MAX_LEN << ", channel: "
2041                                 << channel << ")" << std::endl;
2042                 return false;
2043         }
2044
2045         // @TODO: do some client rate limiting
2046         NetworkPacket pkt(TOSERVER_MODCHANNEL_MSG, 2 + channel.size() + 2 + message.size());
2047         pkt << channel << message;
2048         Send(&pkt);
2049         return true;
2050 }
2051
2052 ModChannel* Client::getModChannel(const std::string &channel)
2053 {
2054         return m_modchannel_mgr->getModChannel(channel);
2055 }