src/network/clientpackethandler.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2015 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
   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 "client.h"
  21
  22 #include "util/base64.h"
  23 #include "clientmedia.h"
  24 #include "log.h"
  25 #include "map.h"
  26 #include "mapsector.h"
  27 #include "minimap.h"
  28 #include "nodedef.h"
  29 #include "serialization.h"
  30 #include "server.h"
  31 #include "util/strfnd.h"
  32 #include "network/clientopcodes.h"
  33 #include "util/serialize.h"
  34 #include "util/srp.h"
  35
  36 void Client::handleCommand_Deprecated(NetworkPacket* pkt)
  37 {
  38         infostream << "Got deprecated command "
  39                         << toClientCommandTable[pkt->getCommand()].name << " from peer "
  40                         << pkt->getPeerId() << "!" << std::endl;
  41 }
  42
  43 void Client::handleCommand_Hello(NetworkPacket* pkt)
  44 {
  45         if (pkt->getSize() < 1)
  46                 return;
  47
  48         u8 serialization_ver;
  49         u16 proto_ver;
  50         u16 compression_mode;
  51         u32 auth_mechs;
  52         std::string username_legacy; // for case insensitivity
  53         *pkt >> serialization_ver >> compression_mode >> proto_ver
  54                 >> auth_mechs >> username_legacy;
  55
  56         // Chose an auth method we support
  57         AuthMechanism chosen_auth_mechanism = choseAuthMech(auth_mechs);
  58
  59         infostream << "Client: TOCLIENT_HELLO received with "
  60                         << "serialization_ver=" << (u32)serialization_ver
  61                         << ", auth_mechs=" << auth_mechs
  62                         << ", proto_ver=" << proto_ver
  63                         << ", compression_mode=" << compression_mode
  64                         << ". Doing auth with mech " << chosen_auth_mechanism << std::endl;
  65
  66         if (!ser_ver_supported(serialization_ver)) {
  67                 infostream << "Client: TOCLIENT_HELLO: Server sent "
  68                                 << "unsupported ser_fmt_ver"<< std::endl;
  69                 return;
  70         }
  71
  72         m_server_ser_ver = serialization_ver;
  73         m_proto_ver = proto_ver;
  74
  75         //TODO verify that username_legacy matches sent username, only
  76         // differs in casing (make both uppercase and compare)
  77         // This is only neccessary though when we actually want to add casing support
  78
  79         if (m_chosen_auth_mech != AUTH_MECHANISM_NONE) {
  80                 // we recieved a TOCLIENT_HELLO while auth was already going on
  81                 errorstream << "Client: TOCLIENT_HELLO while auth was already going on"
  82                         << "(chosen_mech=" << m_chosen_auth_mech << ")." << std::endl;
  83                 if ((m_chosen_auth_mech == AUTH_MECHANISM_SRP)
  84                                 || (m_chosen_auth_mech == AUTH_MECHANISM_LEGACY_PASSWORD)) {
  85                         srp_user_delete((SRPUser *) m_auth_data);
  86                         m_auth_data = 0;
  87                 }
  88         }
  89
  90         // Authenticate using that method, or abort if there wasn't any method found
  91         if (chosen_auth_mechanism != AUTH_MECHANISM_NONE) {
  92                 startAuth(chosen_auth_mechanism);
  93         } else {
  94                 m_chosen_auth_mech = AUTH_MECHANISM_NONE;
  95                 m_access_denied = true;
  96                 m_access_denied_reason = "Unknown";
  97                 m_con.Disconnect();
  98         }
  99
 100 }
 101
 102 void Client::handleCommand_AuthAccept(NetworkPacket* pkt)
 103 {
 104         deleteAuthData();
 105
 106         v3f playerpos;
 107         *pkt >> playerpos >> m_map_seed >> m_recommended_send_interval
 108                 >> m_sudo_auth_methods;
 109
 110         playerpos -= v3f(0, BS / 2, 0);
 111
 112         // Set player position
 113         LocalPlayer *player = m_env.getLocalPlayer();
 114         assert(player != NULL);
 115         player->setPosition(playerpos);
 116
 117         infostream << "Client: received map seed: " << m_map_seed << std::endl;
 118         infostream << "Client: received recommended send interval "
 119                                         << m_recommended_send_interval<<std::endl;
 120
 121         // Reply to server
 122         NetworkPacket resp_pkt(TOSERVER_INIT2, 0);
 123         Send(&resp_pkt);
 124
 125         m_state = LC_Init;
 126 }
 127 void Client::handleCommand_AcceptSudoMode(NetworkPacket* pkt)
 128 {
 129         deleteAuthData();
 130
 131         m_password = m_new_password;
 132
 133         verbosestream << "Client: Recieved TOCLIENT_ACCEPT_SUDO_MODE." << std::endl;
 134
 135         // send packet to actually set the password
 136         startAuth(AUTH_MECHANISM_FIRST_SRP);
 137
 138         // reset again
 139         m_chosen_auth_mech = AUTH_MECHANISM_NONE;
 140 }
 141 void Client::handleCommand_DenySudoMode(NetworkPacket* pkt)
 142 {
 143         m_chat_queue.push(L"Password change denied. Password NOT changed.");
 144         // reset everything and be sad
 145         deleteAuthData();
 146 }
 147 void Client::handleCommand_InitLegacy(NetworkPacket* pkt)
 148 {
 149         if (pkt->getSize() < 1)
 150                 return;
 151
 152         u8 server_ser_ver;
 153         *pkt >> server_ser_ver;
 154
 155         infostream << "Client: TOCLIENT_INIT_LEGACY received with "
 156                 "server_ser_ver=" << ((int)server_ser_ver & 0xff) << std::endl;
 157
 158         if (!ser_ver_supported(server_ser_ver)) {
 159                 infostream << "Client: TOCLIENT_INIT_LEGACY: Server sent "
 160                                 << "unsupported ser_fmt_ver"<< std::endl;
 161                 return;
 162         }
 163
 164         m_server_ser_ver = server_ser_ver;
 165
 166         // We can be totally wrong with this guess
 167         // but we only need some value < 25.
 168         m_proto_ver = 24;
 169
 170         // Get player position
 171         v3s16 playerpos_s16(0, BS * 2 + BS * 20, 0);
 172         if (pkt->getSize() >= 1 + 6) {
 173                 *pkt >> playerpos_s16;
 174         }
 175         v3f playerpos_f = intToFloat(playerpos_s16, BS) - v3f(0, BS / 2, 0);
 176
 177
 178         // Set player position
 179         LocalPlayer *player = m_env.getLocalPlayer();
 180         assert(player != NULL);
 181         player->setPosition(playerpos_f);
 182
 183         if (pkt->getSize() >= 1 + 6 + 8) {
 184                 // Get map seed
 185                 *pkt >> m_map_seed;
 186                 infostream << "Client: received map seed: " << m_map_seed << std::endl;
 187         }
 188
 189         if (pkt->getSize() >= 1 + 6 + 8 + 4) {
 190                 *pkt >> m_recommended_send_interval;
 191                 infostream << "Client: received recommended send interval "
 192                                 << m_recommended_send_interval<<std::endl;
 193         }
 194
 195         // Reply to server
 196         NetworkPacket resp_pkt(TOSERVER_INIT2, 0);
 197         Send(&resp_pkt);
 198
 199         m_state = LC_Init;
 200 }
 201
 202 void Client::handleCommand_AccessDenied(NetworkPacket* pkt)
 203 {
 204         // The server didn't like our password. Note, this needs
 205         // to be processed even if the serialisation format has
 206         // not been agreed yet, the same as TOCLIENT_INIT.
 207         m_access_denied = true;
 208         m_access_denied_reason = "Unknown";
 209
 210         if (pkt->getCommand() == TOCLIENT_ACCESS_DENIED) {
 211                 if (pkt->getSize() < 1)
 212                         return;
 213
 214                 u8 denyCode = SERVER_ACCESSDENIED_UNEXPECTED_DATA;
 215                 *pkt >> denyCode;
 216                 if (denyCode == SERVER_ACCESSDENIED_SHUTDOWN ||
 217                                 denyCode == SERVER_ACCESSDENIED_CRASH) {
 218                         *pkt >> m_access_denied_reason;
 219                         if (m_access_denied_reason == "") {
 220                                 m_access_denied_reason = accessDeniedStrings[denyCode];
 221                         }
 222                         u8 reconnect;
 223                         *pkt >> reconnect;
 224                         m_access_denied_reconnect = reconnect & 1;
 225                 } else if (denyCode == SERVER_ACCESSDENIED_CUSTOM_STRING) {
 226                         *pkt >> m_access_denied_reason;
 227                 } else if (denyCode < SERVER_ACCESSDENIED_MAX) {
 228                         m_access_denied_reason = accessDeniedStrings[denyCode];
 229                 } else {
 230                         // Allow us to add new error messages to the
 231                         // protocol without raising the protocol version, if we want to.
 232                         // Until then (which may be never), this is outside
 233                         // of the defined protocol.
 234                         *pkt >> m_access_denied_reason;
 235                         if (m_access_denied_reason == "") {
 236                                 m_access_denied_reason = "Unknown";
 237                         }
 238                 }
 239         }
 240         // 13/03/15 Legacy code from 0.4.12 and lesser. must stay 1 year
 241         // for compat with old clients
 242         else {
 243                 if (pkt->getSize() >= 2) {
 244                         std::wstring wide_reason;
 245                         *pkt >> wide_reason;
 246                         m_access_denied_reason = wide_to_utf8(wide_reason);
 247                 }
 248         }
 249 }
 250
 251 void Client::handleCommand_RemoveNode(NetworkPacket* pkt)
 252 {
 253         if (pkt->getSize() < 6)
 254                 return;
 255
 256         v3s16 p;
 257         *pkt >> p;
 258         removeNode(p);
 259 }
 260
 261 void Client::handleCommand_AddNode(NetworkPacket* pkt)
 262 {
 263         if (pkt->getSize() < 6 + MapNode::serializedLength(m_server_ser_ver))
 264                 return;
 265
 266         v3s16 p;
 267         *pkt >> p;
 268
 269         MapNode n;
 270         n.deSerialize(pkt->getU8Ptr(6), m_server_ser_ver);
 271
 272         bool remove_metadata = true;
 273         u32 index = 6 + MapNode::serializedLength(m_server_ser_ver);
 274         if ((pkt->getSize() >= index + 1) && pkt->getU8(index)) {
 275                 remove_metadata = false;
 276         }
 277
 278         addNode(p, n, remove_metadata);
 279 }
 280 void Client::handleCommand_BlockData(NetworkPacket* pkt)
 281 {
 282         // Ignore too small packet
 283         if (pkt->getSize() < 6)
 284                 return;
 285
 286         v3s16 p;
 287         *pkt >> p;
 288
 289         std::string datastring(pkt->getString(6), pkt->getSize() - 6);
 290         std::istringstream istr(datastring, std::ios_base::binary);
 291
 292         MapSector *sector;
 293         MapBlock *block;
 294
 295         v2s16 p2d(p.X, p.Z);
 296         sector = m_env.getMap().emergeSector(p2d);
 297
 298         assert(sector->getPos() == p2d);
 299
 300         block = sector->getBlockNoCreateNoEx(p.Y);
 301         if (block) {
 302                 /*
 303                         Update an existing block
 304                 */
 305                 block->deSerialize(istr, m_server_ser_ver, false);
 306                 block->deSerializeNetworkSpecific(istr);
 307         }
 308         else {
 309                 /*
 310                         Create a new block
 311                 */
 312                 block = new MapBlock(&m_env.getMap(), p, this);
 313                 block->deSerialize(istr, m_server_ser_ver, false);
 314                 block->deSerializeNetworkSpecific(istr);
 315                 sector->insertBlock(block);
 316         }
 317
 318         if (m_localdb) {
 319                 ServerMap::saveBlock(block, m_localdb);
 320         }
 321
 322         /*
 323                 Add it to mesh update queue and set it to be acknowledged after update.
 324         */
 325         addUpdateMeshTaskWithEdge(p, true);
 326 }
 327
 328 void Client::handleCommand_Inventory(NetworkPacket* pkt)
 329 {
 330         if (pkt->getSize() < 1)
 331                 return;
 332
 333         std::string datastring(pkt->getString(0), pkt->getSize());
 334         std::istringstream is(datastring, std::ios_base::binary);
 335
 336         LocalPlayer *player = m_env.getLocalPlayer();
 337         assert(player != NULL);
 338
 339         player->inventory.deSerialize(is);
 340
 341         m_inventory_updated = true;
 342
 343         delete m_inventory_from_server;
 344         m_inventory_from_server = new Inventory(player->inventory);
 345         m_inventory_from_server_age = 0.0;
 346 }
 347
 348 void Client::handleCommand_TimeOfDay(NetworkPacket* pkt)
 349 {
 350         if (pkt->getSize() < 2)
 351                 return;
 352
 353         u16 time_of_day;
 354
 355         *pkt >> time_of_day;
 356
 357         time_of_day      = time_of_day % 24000;
 358         float time_speed = 0;
 359
 360         if (pkt->getSize() >= 2 + 4) {
 361                 *pkt >> time_speed;
 362         }
 363         else {
 364                 // Old message; try to approximate speed of time by ourselves
 365                 float time_of_day_f = (float)time_of_day / 24000.0;
 366                 float tod_diff_f = 0;
 367
 368                 if (time_of_day_f < 0.2 && m_last_time_of_day_f > 0.8)
 369                         tod_diff_f = time_of_day_f - m_last_time_of_day_f + 1.0;
 370                 else
 371                         tod_diff_f = time_of_day_f - m_last_time_of_day_f;
 372
 373                 m_last_time_of_day_f       = time_of_day_f;
 374                 float time_diff            = m_time_of_day_update_timer;
 375                 m_time_of_day_update_timer = 0;
 376
 377                 if (m_time_of_day_set) {
 378                         time_speed = (3600.0 * 24.0) * tod_diff_f / time_diff;
 379                         infostream << "Client: Measured time_of_day speed (old format): "
 380                                         << time_speed << " tod_diff_f=" << tod_diff_f
 381                                         << " time_diff=" << time_diff << std::endl;
 382                 }
 383         }
 384
 385         // Update environment
 386         m_env.setTimeOfDay(time_of_day);
 387         m_env.setTimeOfDaySpeed(time_speed);
 388         m_time_of_day_set = true;
 389
 390         u32 dr = m_env.getDayNightRatio();
 391         infostream << "Client: time_of_day=" << time_of_day
 392                         << " time_speed=" << time_speed
 393                         << " dr=" << dr << std::endl;
 394 }
 395
 396 void Client::handleCommand_ChatMessage(NetworkPacket* pkt)
 397 {
 398         /*
 399                 u16 command
 400                 u16 length
 401                 wstring message
 402         */
 403         u16 len, read_wchar;
 404
 405         *pkt >> len;
 406
 407         std::wstring message;
 408         for (u32 i = 0; i < len; i++) {
 409                 *pkt >> read_wchar;
 410                 message += (wchar_t)read_wchar;
 411         }
 412
 413         m_chat_queue.push(message);
 414 }
 415
 416 void Client::handleCommand_ActiveObjectRemoveAdd(NetworkPacket* pkt)
 417 {
 418         /*
 419                 u16 count of removed objects
 420                 for all removed objects {
 421                         u16 id
 422                 }
 423                 u16 count of added objects
 424                 for all added objects {
 425                         u16 id
 426                         u8 type
 427                         u32 initialization data length
 428                         string initialization data
 429                 }
 430         */
 431
 432         try {
 433                 u8 type;
 434                 u16 removed_count, added_count, id;
 435
 436                 // Read removed objects
 437                 *pkt >> removed_count;
 438
 439                 for (u16 i = 0; i < removed_count; i++) {
 440                         *pkt >> id;
 441                         m_env.removeActiveObject(id);
 442                 }
 443
 444                 // Read added objects
 445                 *pkt >> added_count;
 446
 447                 for (u16 i = 0; i < added_count; i++) {
 448                         *pkt >> id >> type;
 449                         m_env.addActiveObject(id, type, pkt->readLongString());
 450                 }
 451         } catch (PacketError &e) {
 452                 infostream << "handleCommand_ActiveObjectRemoveAdd: " << e.what()
 453                                 << ". The packet is unreliable, ignoring" << std::endl;
 454         }
 455 }
 456
 457 void Client::handleCommand_ActiveObjectMessages(NetworkPacket* pkt)
 458 {
 459         /*
 460                 for all objects
 461                 {
 462                         u16 id
 463                         u16 message length
 464                         string message
 465                 }
 466         */
 467         std::string datastring(pkt->getString(0), pkt->getSize());
 468         std::istringstream is(datastring, std::ios_base::binary);
 469
 470         try {
 471                 while (is.good()) {
 472                         u16 id = readU16(is);
 473                         if (!is.good())
 474                                 break;
 475
 476                         std::string message = deSerializeString(is);
 477
 478                         // Pass on to the environment
 479                         m_env.processActiveObjectMessage(id, message);
 480                 }
 481         } catch (SerializationError &e) {
 482                 errorstream << "Client::handleCommand_ActiveObjectMessages: "
 483                         << "caught SerializationError: " << e.what() << std::endl;
 484         }
 485 }
 486
 487 void Client::handleCommand_Movement(NetworkPacket* pkt)
 488 {
 489         LocalPlayer *player = m_env.getLocalPlayer();
 490         assert(player != NULL);
 491
 492         float mad, maa, maf, msw, mscr, msf, mscl, msj, lf, lfs, ls, g;
 493
 494         *pkt >> mad >> maa >> maf >> msw >> mscr >> msf >> mscl >> msj
 495                 >> lf >> lfs >> ls >> g;
 496
 497         player->movement_acceleration_default   = mad * BS;
 498         player->movement_acceleration_air       = maa * BS;
 499         player->movement_acceleration_fast      = maf * BS;
 500         player->movement_speed_walk             = msw * BS;
 501         player->movement_speed_crouch           = mscr * BS;
 502         player->movement_speed_fast             = msf * BS;
 503         player->movement_speed_climb            = mscl * BS;
 504         player->movement_speed_jump             = msj * BS;
 505         player->movement_liquid_fluidity        = lf * BS;
 506         player->movement_liquid_fluidity_smooth = lfs * BS;
 507         player->movement_liquid_sink            = ls * BS;
 508         player->movement_gravity                = g * BS;
 509 }
 510
 511 void Client::handleCommand_HP(NetworkPacket* pkt)
 512 {
 513
 514         LocalPlayer *player = m_env.getLocalPlayer();
 515         assert(player != NULL);
 516
 517         u8 oldhp   = player->hp;
 518
 519         u8 hp;
 520         *pkt >> hp;
 521
 522         player->hp = hp;
 523
 524         if (hp < oldhp) {
 525                 // Add to ClientEvent queue
 526                 ClientEvent event;
 527                 event.type = CE_PLAYER_DAMAGE;
 528                 event.player_damage.amount = oldhp - hp;
 529                 m_client_event_queue.push(event);
 530         }
 531 }
 532
 533 void Client::handleCommand_Breath(NetworkPacket* pkt)
 534 {
 535         LocalPlayer *player = m_env.getLocalPlayer();
 536         assert(player != NULL);
 537
 538         u16 breath;
 539
 540         *pkt >> breath;
 541
 542         player->setBreath(breath);
 543 }
 544
 545 void Client::handleCommand_MovePlayer(NetworkPacket* pkt)
 546 {
 547         LocalPlayer *player = m_env.getLocalPlayer();
 548         assert(player != NULL);
 549
 550         v3f pos;
 551         f32 pitch, yaw;
 552
 553         *pkt >> pos >> pitch >> yaw;
 554
 555         player->got_teleported = true;
 556         player->setPosition(pos);
 557
 558         infostream << "Client got TOCLIENT_MOVE_PLAYER"
 559                         << " pos=(" << pos.X << "," << pos.Y << "," << pos.Z << ")"
 560                         << " pitch=" << pitch
 561                         << " yaw=" << yaw
 562                         << std::endl;
 563
 564         /*
 565                 Add to ClientEvent queue.
 566                 This has to be sent to the main program because otherwise
 567                 it would just force the pitch and yaw values to whatever
 568                 the camera points to.
 569         */
 570         ClientEvent event;
 571         event.type = CE_PLAYER_FORCE_MOVE;
 572         event.player_force_move.pitch = pitch;
 573         event.player_force_move.yaw = yaw;
 574         m_client_event_queue.push(event);
 575
 576         // Ignore damage for a few seconds, so that the player doesn't
 577         // get damage from falling on ground
 578         m_ignore_damage_timer = 3.0;
 579 }
 580
 581 void Client::handleCommand_PlayerItem(NetworkPacket* pkt)
 582 {
 583         warningstream << "Client: Ignoring TOCLIENT_PLAYERITEM" << std::endl;
 584 }
 585
 586 void Client::handleCommand_DeathScreen(NetworkPacket* pkt)
 587 {
 588         bool set_camera_point_target;
 589         v3f camera_point_target;
 590
 591         *pkt >> set_camera_point_target;
 592         *pkt >> camera_point_target;
 593
 594         ClientEvent event;
 595         event.type                                = CE_DEATHSCREEN;
 596         event.deathscreen.set_camera_point_target = set_camera_point_target;
 597         event.deathscreen.camera_point_target_x   = camera_point_target.X;
 598         event.deathscreen.camera_point_target_y   = camera_point_target.Y;
 599         event.deathscreen.camera_point_target_z   = camera_point_target.Z;
 600         m_client_event_queue.push(event);
 601 }
 602
 603 void Client::handleCommand_AnnounceMedia(NetworkPacket* pkt)
 604 {
 605         u16 num_files;
 606
 607         *pkt >> num_files;
 608
 609         infostream << "Client: Received media announcement: packet size: "
 610                         << pkt->getSize() << std::endl;
 611
 612         if (m_media_downloader == NULL ||
 613                         m_media_downloader->isStarted()) {
 614                 const char *problem = m_media_downloader ?
 615                         "we already saw another announcement" :
 616                         "all media has been received already";
 617                 errorstream << "Client: Received media announcement but "
 618                         << problem << "! "
 619                         << " files=" << num_files
 620                         << " size=" << pkt->getSize() << std::endl;
 621                 return;
 622         }
 623
 624         // Mesh update thread must be stopped while
 625         // updating content definitions
 626         sanity_check(!m_mesh_update_thread.isRunning());
 627
 628         for (u16 i = 0; i < num_files; i++) {
 629                 std::string name, sha1_base64;
 630
 631                 *pkt >> name >> sha1_base64;
 632
 633                 std::string sha1_raw = base64_decode(sha1_base64);
 634                 m_media_downloader->addFile(name, sha1_raw);
 635         }
 636
 637         try {
 638                 std::string str;
 639
 640                 *pkt >> str;
 641
 642                 Strfnd sf(str);
 643                 while(!sf.at_end()) {
 644                         std::string baseurl = trim(sf.next(","));
 645                         if (baseurl != "")
 646                                 m_media_downloader->addRemoteServer(baseurl);
 647                 }
 648         }
 649         catch(SerializationError& e) {
 650                 // not supported by server or turned off
 651         }
 652
 653         m_media_downloader->step(this);
 654 }
 655
 656 void Client::handleCommand_Media(NetworkPacket* pkt)
 657 {
 658         /*
 659                 u16 command
 660                 u16 total number of file bunches
 661                 u16 index of this bunch
 662                 u32 number of files in this bunch
 663                 for each file {
 664                         u16 length of name
 665                         string name
 666                         u32 length of data
 667                         data
 668                 }
 669         */
 670         u16 num_bunches;
 671         u16 bunch_i;
 672         u32 num_files;
 673
 674         *pkt >> num_bunches >> bunch_i >> num_files;
 675
 676         infostream << "Client: Received files: bunch " << bunch_i << "/"
 677                         << num_bunches << " files=" << num_files
 678                         << " size=" << pkt->getSize() << std::endl;
 679
 680         if (num_files == 0)
 681                 return;
 682
 683         if (m_media_downloader == NULL ||
 684                         !m_media_downloader->isStarted()) {
 685                 const char *problem = m_media_downloader ?
 686                         "media has not been requested" :
 687                         "all media has been received already";
 688                 errorstream << "Client: Received media but "
 689                         << problem << "! "
 690                         << " bunch " << bunch_i << "/" << num_bunches
 691                         << " files=" << num_files
 692                         << " size=" << pkt->getSize() << std::endl;
 693                 return;
 694         }
 695
 696         // Mesh update thread must be stopped while
 697         // updating content definitions
 698         sanity_check(!m_mesh_update_thread.isRunning());
 699
 700         for (u32 i=0; i < num_files; i++) {
 701                 std::string name;
 702
 703                 *pkt >> name;
 704
 705                 std::string data = pkt->readLongString();
 706
 707                 m_media_downloader->conventionalTransferDone(
 708                                 name, data, this);
 709         }
 710 }
 711
 712 void Client::handleCommand_ToolDef(NetworkPacket* pkt)
 713 {
 714         warningstream << "Client: Ignoring TOCLIENT_TOOLDEF" << std::endl;
 715 }
 716
 717 void Client::handleCommand_NodeDef(NetworkPacket* pkt)
 718 {
 719         infostream << "Client: Received node definitions: packet size: "
 720                         << pkt->getSize() << std::endl;
 721
 722         // Mesh update thread must be stopped while
 723         // updating content definitions
 724         sanity_check(!m_mesh_update_thread.isRunning());
 725
 726         // Decompress node definitions
 727         std::string datastring(pkt->getString(0), pkt->getSize());
 728         std::istringstream is(datastring, std::ios_base::binary);
 729         std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
 730         std::ostringstream tmp_os;
 731         decompressZlib(tmp_is, tmp_os);
 732
 733         // Deserialize node definitions
 734         std::istringstream tmp_is2(tmp_os.str());
 735         m_nodedef->deSerialize(tmp_is2);
 736         m_nodedef_received = true;
 737 }
 738
 739 void Client::handleCommand_CraftItemDef(NetworkPacket* pkt)
 740 {
 741         warningstream << "Client: Ignoring TOCLIENT_CRAFTITEMDEF" << std::endl;
 742 }
 743
 744 void Client::handleCommand_ItemDef(NetworkPacket* pkt)
 745 {
 746         infostream << "Client: Received item definitions: packet size: "
 747                         << pkt->getSize() << std::endl;
 748
 749         // Mesh update thread must be stopped while
 750         // updating content definitions
 751         sanity_check(!m_mesh_update_thread.isRunning());
 752
 753         // Decompress item definitions
 754         std::string datastring(pkt->getString(0), pkt->getSize());
 755         std::istringstream is(datastring, std::ios_base::binary);
 756         std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
 757         std::ostringstream tmp_os;
 758         decompressZlib(tmp_is, tmp_os);
 759
 760         // Deserialize node definitions
 761         std::istringstream tmp_is2(tmp_os.str());
 762         m_itemdef->deSerialize(tmp_is2);
 763         m_itemdef_received = true;
 764 }
 765
 766 void Client::handleCommand_PlaySound(NetworkPacket* pkt)
 767 {
 768         s32 server_id;
 769         std::string name;
 770         float gain;
 771         u8 type; // 0=local, 1=positional, 2=object
 772         v3f pos;
 773         u16 object_id;
 774         bool loop;
 775
 776         *pkt >> server_id >> name >> gain >> type >> pos >> object_id >> loop;
 777
 778         // Start playing
 779         int client_id = -1;
 780         switch(type) {
 781                 case 0: // local
 782                         client_id = m_sound->playSound(name, loop, gain);
 783                         break;
 784                 case 1: // positional
 785                         client_id = m_sound->playSoundAt(name, loop, gain, pos);
 786                         break;
 787                 case 2:
 788                 { // object
 789                         ClientActiveObject *cao = m_env.getActiveObject(object_id);
 790                         if (cao)
 791                                 pos = cao->getPosition();
 792                         client_id = m_sound->playSoundAt(name, loop, gain, pos);
 793                         // TODO: Set up sound to move with object
 794                         break;
 795                 }
 796                 default:
 797                         break;
 798         }
 799
 800         if (client_id != -1) {
 801                 m_sounds_server_to_client[server_id] = client_id;
 802                 m_sounds_client_to_server[client_id] = server_id;
 803                 if (object_id != 0)
 804                         m_sounds_to_objects[client_id] = object_id;
 805         }
 806 }
 807
 808 void Client::handleCommand_StopSound(NetworkPacket* pkt)
 809 {
 810         s32 server_id;
 811
 812         *pkt >> server_id;
 813
 814         UNORDERED_MAP<s32, int>::iterator i = m_sounds_server_to_client.find(server_id);
 815         if (i != m_sounds_server_to_client.end()) {
 816                 int client_id = i->second;
 817                 m_sound->stopSound(client_id);
 818         }
 819 }
 820
 821 void Client::handleCommand_Privileges(NetworkPacket* pkt)
 822 {
 823         m_privileges.clear();
 824         infostream << "Client: Privileges updated: ";
 825         u16 num_privileges;
 826
 827         *pkt >> num_privileges;
 828
 829         for (u16 i = 0; i < num_privileges; i++) {
 830                 std::string priv;
 831
 832                 *pkt >> priv;
 833
 834                 m_privileges.insert(priv);
 835                 infostream << priv << " ";
 836         }
 837         infostream << std::endl;
 838 }
 839
 840 void Client::handleCommand_InventoryFormSpec(NetworkPacket* pkt)
 841 {
 842         LocalPlayer *player = m_env.getLocalPlayer();
 843         assert(player != NULL);
 844
 845         // Store formspec in LocalPlayer
 846         player->inventory_formspec = pkt->readLongString();
 847 }
 848
 849 void Client::handleCommand_DetachedInventory(NetworkPacket* pkt)
 850 {
 851         std::string datastring(pkt->getString(0), pkt->getSize());
 852         std::istringstream is(datastring, std::ios_base::binary);
 853
 854         std::string name = deSerializeString(is);
 855
 856         infostream << "Client: Detached inventory update: \"" << name
 857                         << "\"" << std::endl;
 858
 859         Inventory *inv = NULL;
 860         if (m_detached_inventories.count(name) > 0)
 861                 inv = m_detached_inventories[name];
 862         else {
 863                 inv = new Inventory(m_itemdef);
 864                 m_detached_inventories[name] = inv;
 865         }
 866         inv->deSerialize(is);
 867 }
 868
 869 void Client::handleCommand_ShowFormSpec(NetworkPacket* pkt)
 870 {
 871         std::string formspec = pkt->readLongString();
 872         std::string formname;
 873
 874         *pkt >> formname;
 875
 876         ClientEvent event;
 877         event.type = CE_SHOW_FORMSPEC;
 878         // pointer is required as event is a struct only!
 879         // adding a std:string to a struct isn't possible
 880         event.show_formspec.formspec = new std::string(formspec);
 881         event.show_formspec.formname = new std::string(formname);
 882         m_client_event_queue.push(event);
 883 }
 884
 885 void Client::handleCommand_SpawnParticle(NetworkPacket* pkt)
 886 {
 887         std::string datastring(pkt->getString(0), pkt->getSize());
 888         std::istringstream is(datastring, std::ios_base::binary);
 889
 890         v3f pos                 = readV3F1000(is);
 891         v3f vel                 = readV3F1000(is);
 892         v3f acc                 = readV3F1000(is);
 893         float expirationtime    = readF1000(is);
 894         float size              = readF1000(is);
 895         bool collisiondetection = readU8(is);
 896         std::string texture     = deSerializeLongString(is);
 897         bool vertical           = false;
 898         bool collision_removal  = false;
 899         try {
 900                 vertical = readU8(is);
 901                 collision_removal = readU8(is);
 902         } catch (...) {}
 903
 904         ClientEvent event;
 905         event.type                              = CE_SPAWN_PARTICLE;
 906         event.spawn_particle.pos                = new v3f (pos);
 907         event.spawn_particle.vel                = new v3f (vel);
 908         event.spawn_particle.acc                = new v3f (acc);
 909         event.spawn_particle.expirationtime     = expirationtime;
 910         event.spawn_particle.size               = size;
 911         event.spawn_particle.collisiondetection = collisiondetection;
 912         event.spawn_particle.collision_removal  = collision_removal;
 913         event.spawn_particle.vertical           = vertical;
 914         event.spawn_particle.texture            = new std::string(texture);
 915
 916         m_client_event_queue.push(event);
 917 }
 918
 919 void Client::handleCommand_AddParticleSpawner(NetworkPacket* pkt)
 920 {
 921         u16 amount;
 922         float spawntime;
 923         v3f minpos;
 924         v3f maxpos;
 925         v3f minvel;
 926         v3f maxvel;
 927         v3f minacc;
 928         v3f maxacc;
 929         float minexptime;
 930         float maxexptime;
 931         float minsize;
 932         float maxsize;
 933         bool collisiondetection;
 934         u32 id;
 935
 936         *pkt >> amount >> spawntime >> minpos >> maxpos >> minvel >> maxvel
 937                 >> minacc >> maxacc >> minexptime >> maxexptime >> minsize
 938                 >> maxsize >> collisiondetection;
 939
 940         std::string texture = pkt->readLongString();
 941
 942         *pkt >> id;
 943
 944         bool vertical = false;
 945         bool collision_removal = false;
 946         u16 attached_id = 0;
 947         try {
 948                 *pkt >> vertical;
 949                 *pkt >> collision_removal;
 950                 *pkt >> attached_id;
 951
 952         } catch (...) {}
 953
 954         ClientEvent event;
 955         event.type                                   = CE_ADD_PARTICLESPAWNER;
 956         event.add_particlespawner.amount             = amount;
 957         event.add_particlespawner.spawntime          = spawntime;
 958         event.add_particlespawner.minpos             = new v3f (minpos);
 959         event.add_particlespawner.maxpos             = new v3f (maxpos);
 960         event.add_particlespawner.minvel             = new v3f (minvel);
 961         event.add_particlespawner.maxvel             = new v3f (maxvel);
 962         event.add_particlespawner.minacc             = new v3f (minacc);
 963         event.add_particlespawner.maxacc             = new v3f (maxacc);
 964         event.add_particlespawner.minexptime         = minexptime;
 965         event.add_particlespawner.maxexptime         = maxexptime;
 966         event.add_particlespawner.minsize            = minsize;
 967         event.add_particlespawner.maxsize            = maxsize;
 968         event.add_particlespawner.collisiondetection = collisiondetection;
 969         event.add_particlespawner.collision_removal  = collision_removal;
 970         event.add_particlespawner.attached_id        = attached_id;
 971         event.add_particlespawner.vertical           = vertical;
 972         event.add_particlespawner.texture            = new std::string(texture);
 973         event.add_particlespawner.id                 = id;
 974
 975         m_client_event_queue.push(event);
 976 }
 977
 978
 979 void Client::handleCommand_DeleteParticleSpawner(NetworkPacket* pkt)
 980 {
 981         u16 legacy_id;
 982         u32 id;
 983
 984         // Modification set 13/03/15, 1 year of compat for protocol v24
 985         if (pkt->getCommand() == TOCLIENT_DELETE_PARTICLESPAWNER_LEGACY) {
 986                 *pkt >> legacy_id;
 987         }
 988         else {
 989                 *pkt >> id;
 990         }
 991
 992
 993         ClientEvent event;
 994         event.type                      = CE_DELETE_PARTICLESPAWNER;
 995         event.delete_particlespawner.id =
 996                         (pkt->getCommand() == TOCLIENT_DELETE_PARTICLESPAWNER_LEGACY ? (u32) legacy_id : id);
 997
 998         m_client_event_queue.push(event);
 999 }
1000
1001 void Client::handleCommand_HudAdd(NetworkPacket* pkt)
1002 {
1003         std::string datastring(pkt->getString(0), pkt->getSize());
1004         std::istringstream is(datastring, std::ios_base::binary);
1005
1006         u32 id;
1007         u8 type;
1008         v2f pos;
1009         std::string name;
1010         v2f scale;
1011         std::string text;
1012         u32 number;
1013         u32 item;
1014         u32 dir;
1015         v2f align;
1016         v2f offset;
1017         v3f world_pos;
1018         v2s32 size;
1019
1020         *pkt >> id >> type >> pos >> name >> scale >> text >> number >> item
1021                 >> dir >> align >> offset;
1022         try {
1023                 *pkt >> world_pos;
1024         }
1025         catch(SerializationError &e) {};
1026
1027         try {
1028                 *pkt >> size;
1029         } catch(SerializationError &e) {};
1030
1031         ClientEvent event;
1032         event.type             = CE_HUDADD;
1033         event.hudadd.id        = id;
1034         event.hudadd.type      = type;
1035         event.hudadd.pos       = new v2f(pos);
1036         event.hudadd.name      = new std::string(name);
1037         event.hudadd.scale     = new v2f(scale);
1038         event.hudadd.text      = new std::string(text);
1039         event.hudadd.number    = number;
1040         event.hudadd.item      = item;
1041         event.hudadd.dir       = dir;
1042         event.hudadd.align     = new v2f(align);
1043         event.hudadd.offset    = new v2f(offset);
1044         event.hudadd.world_pos = new v3f(world_pos);
1045         event.hudadd.size      = new v2s32(size);
1046         m_client_event_queue.push(event);
1047 }
1048
1049 void Client::handleCommand_HudRemove(NetworkPacket* pkt)
1050 {
1051         u32 id;
1052
1053         *pkt >> id;
1054
1055         ClientEvent event;
1056         event.type     = CE_HUDRM;
1057         event.hudrm.id = id;
1058         m_client_event_queue.push(event);
1059 }
1060
1061 void Client::handleCommand_HudChange(NetworkPacket* pkt)
1062 {
1063         std::string sdata;
1064         v2f v2fdata;
1065         v3f v3fdata;
1066         u32 intdata = 0;
1067         v2s32 v2s32data;
1068         u32 id;
1069         u8 stat;
1070
1071         *pkt >> id >> stat;
1072
1073         if (stat == HUD_STAT_POS || stat == HUD_STAT_SCALE ||
1074                 stat == HUD_STAT_ALIGN || stat == HUD_STAT_OFFSET)
1075                 *pkt >> v2fdata;
1076         else if (stat == HUD_STAT_NAME || stat == HUD_STAT_TEXT)
1077                 *pkt >> sdata;
1078         else if (stat == HUD_STAT_WORLD_POS)
1079                 *pkt >> v3fdata;
1080         else if (stat == HUD_STAT_SIZE )
1081                 *pkt >> v2s32data;
1082         else
1083                 *pkt >> intdata;
1084
1085         ClientEvent event;
1086         event.type              = CE_HUDCHANGE;
1087         event.hudchange.id      = id;
1088         event.hudchange.stat    = (HudElementStat)stat;
1089         event.hudchange.v2fdata = new v2f(v2fdata);
1090         event.hudchange.v3fdata = new v3f(v3fdata);
1091         event.hudchange.sdata   = new std::string(sdata);
1092         event.hudchange.data    = intdata;
1093         event.hudchange.v2s32data = new v2s32(v2s32data);
1094         m_client_event_queue.push(event);
1095 }
1096
1097 void Client::handleCommand_HudSetFlags(NetworkPacket* pkt)
1098 {
1099         u32 flags, mask;
1100
1101         *pkt >> flags >> mask;
1102
1103         LocalPlayer *player = m_env.getLocalPlayer();
1104         assert(player != NULL);
1105
1106         bool was_minimap_visible = player->hud_flags & HUD_FLAG_MINIMAP_VISIBLE;
1107
1108         player->hud_flags &= ~mask;
1109         player->hud_flags |= flags;
1110
1111         m_minimap_disabled_by_server = !(player->hud_flags & HUD_FLAG_MINIMAP_VISIBLE);
1112
1113         // Hide minimap if it has been disabled by the server
1114         if (m_minimap_disabled_by_server && was_minimap_visible) {
1115                 // defers a minimap update, therefore only call it if really
1116                 // needed, by checking that minimap was visible before
1117                 m_mapper->setMinimapMode(MINIMAP_MODE_OFF);
1118         }
1119 }
1120
1121 void Client::handleCommand_HudSetParam(NetworkPacket* pkt)
1122 {
1123         u16 param; std::string value;
1124
1125         *pkt >> param >> value;
1126
1127         LocalPlayer *player = m_env.getLocalPlayer();
1128         assert(player != NULL);
1129
1130         if (param == HUD_PARAM_HOTBAR_ITEMCOUNT && value.size() == 4) {
1131                 s32 hotbar_itemcount = readS32((u8*) value.c_str());
1132                 if (hotbar_itemcount > 0 && hotbar_itemcount <= HUD_HOTBAR_ITEMCOUNT_MAX)
1133                         player->hud_hotbar_itemcount = hotbar_itemcount;
1134         }
1135         else if (param == HUD_PARAM_HOTBAR_IMAGE) {
1136                 player->hotbar_image = value;
1137         }
1138         else if (param == HUD_PARAM_HOTBAR_SELECTED_IMAGE) {
1139                 player->hotbar_selected_image = value;
1140         }
1141 }
1142
1143 void Client::handleCommand_HudSetSky(NetworkPacket* pkt)
1144 {
1145         std::string datastring(pkt->getString(0), pkt->getSize());
1146         std::istringstream is(datastring, std::ios_base::binary);
1147
1148         video::SColor *bgcolor           = new video::SColor(readARGB8(is));
1149         std::string *type                = new std::string(deSerializeString(is));
1150         u16 count                        = readU16(is);
1151         std::vector<std::string> *params = new std::vector<std::string>;
1152
1153         for (size_t i = 0; i < count; i++)
1154                 params->push_back(deSerializeString(is));
1155
1156         ClientEvent event;
1157         event.type            = CE_SET_SKY;
1158         event.set_sky.bgcolor = bgcolor;
1159         event.set_sky.type    = type;
1160         event.set_sky.params  = params;
1161         m_client_event_queue.push(event);
1162 }
1163
1164 void Client::handleCommand_OverrideDayNightRatio(NetworkPacket* pkt)
1165 {
1166         bool do_override;
1167         u16 day_night_ratio_u;
1168
1169         *pkt >> do_override >> day_night_ratio_u;
1170
1171         float day_night_ratio_f = (float)day_night_ratio_u / 65536;
1172
1173         ClientEvent event;
1174         event.type                                 = CE_OVERRIDE_DAY_NIGHT_RATIO;
1175         event.override_day_night_ratio.do_override = do_override;
1176         event.override_day_night_ratio.ratio_f     = day_night_ratio_f;
1177         m_client_event_queue.push(event);
1178 }
1179
1180 void Client::handleCommand_LocalPlayerAnimations(NetworkPacket* pkt)
1181 {
1182         LocalPlayer *player = m_env.getLocalPlayer();
1183         assert(player != NULL);
1184
1185         *pkt >> player->local_animations[0];
1186         *pkt >> player->local_animations[1];
1187         *pkt >> player->local_animations[2];
1188         *pkt >> player->local_animations[3];
1189         *pkt >> player->local_animation_speed;
1190 }
1191
1192 void Client::handleCommand_EyeOffset(NetworkPacket* pkt)
1193 {
1194         LocalPlayer *player = m_env.getLocalPlayer();
1195         assert(player != NULL);
1196
1197         *pkt >> player->eye_offset_first >> player->eye_offset_third;
1198 }
1199
1200 void Client::handleCommand_SrpBytesSandB(NetworkPacket* pkt)
1201 {
1202         if ((m_chosen_auth_mech != AUTH_MECHANISM_LEGACY_PASSWORD)
1203                         && (m_chosen_auth_mech != AUTH_MECHANISM_SRP)) {
1204                 errorstream << "Client: Recieved SRP S_B login message,"
1205                         << " but wasn't supposed to (chosen_mech="
1206                         << m_chosen_auth_mech << ")." << std::endl;
1207                 return;
1208         }
1209
1210         char *bytes_M = 0;
1211         size_t len_M = 0;
1212         SRPUser *usr = (SRPUser *) m_auth_data;
1213         std::string s;
1214         std::string B;
1215         *pkt >> s >> B;
1216
1217         infostream << "Client: Recieved TOCLIENT_SRP_BYTES_S_B." << std::endl;
1218
1219         srp_user_process_challenge(usr, (const unsigned char *) s.c_str(), s.size(),
1220                 (const unsigned char *) B.c_str(), B.size(),
1221                 (unsigned char **) &bytes_M, &len_M);
1222
1223         if ( !bytes_M ) {
1224                 errorstream << "Client: SRP-6a S_B safety check violation!" << std::endl;
1225                 return;
1226         }
1227
1228         NetworkPacket resp_pkt(TOSERVER_SRP_BYTES_M, 0);
1229         resp_pkt << std::string(bytes_M, len_M);
1230         Send(&resp_pkt);
1231 }