src/network/networkprotocol.h

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 #ifndef NETWORKPROTOCOL_HEADER
  21 #define NETWORKPROTOCOL_HEADER
  22 #include "util/string.h"
  23
  24 /*
  25         changes by PROTOCOL_VERSION:
  26
  27         PROTOCOL_VERSION 3:
  28                 Base for writing changes here
  29         PROTOCOL_VERSION 4:
  30                 Add TOCLIENT_MEDIA
  31                 Add TOCLIENT_TOOLDEF
  32                 Add TOCLIENT_NODEDEF
  33                 Add TOCLIENT_CRAFTITEMDEF
  34                 Add TOSERVER_INTERACT
  35                 Obsolete TOSERVER_CLICK_ACTIVEOBJECT
  36                 Obsolete TOSERVER_GROUND_ACTION
  37         PROTOCOL_VERSION 5:
  38                 Make players to be handled mostly as ActiveObjects
  39         PROTOCOL_VERSION 6:
  40                 Only non-cached textures are sent
  41         PROTOCOL_VERSION 7:
  42                 Add TOCLIENT_ITEMDEF
  43                 Obsolete TOCLIENT_TOOLDEF
  44                 Obsolete TOCLIENT_CRAFTITEMDEF
  45                 Compress the contents of TOCLIENT_ITEMDEF and TOCLIENT_NODEDEF
  46         PROTOCOL_VERSION 8:
  47                 Digging based on item groups
  48                 Many things
  49         PROTOCOL_VERSION 9:
  50                 ContentFeatures and NodeDefManager use a different serialization
  51                     format; better for future version cross-compatibility
  52                 Many things
  53                 Obsolete TOCLIENT_PLAYERITEM
  54         PROTOCOL_VERSION 10:
  55                 TOCLIENT_PRIVILEGES
  56                 Version raised to force 'fly' and 'fast' privileges into effect.
  57                 Node metadata change (came in later; somewhat incompatible)
  58         PROTOCOL_VERSION 11:
  59                 TileDef in ContentFeatures
  60                 Nodebox drawtype
  61                 (some dev snapshot)
  62                 TOCLIENT_INVENTORY_FORMSPEC
  63                 (0.4.0, 0.4.1)
  64         PROTOCOL_VERSION 12:
  65                 TOSERVER_INVENTORY_FIELDS
  66                 16-bit node ids
  67                 TOCLIENT_DETACHED_INVENTORY
  68         PROTOCOL_VERSION 13:
  69                 InventoryList field "Width" (deserialization fails with old versions)
  70         PROTOCOL_VERSION 14:
  71                 Added transfer of player pressed keys to the server
  72                 Added new messages for mesh and bone animation, as well as attachments
  73                 GENERIC_CMD_SET_ANIMATION
  74                 GENERIC_CMD_SET_BONE_POSITION
  75                 GENERIC_CMD_SET_ATTACHMENT
  76         PROTOCOL_VERSION 15:
  77                 Serialization format changes
  78         PROTOCOL_VERSION 16:
  79                 TOCLIENT_SHOW_FORMSPEC
  80         PROTOCOL_VERSION 17:
  81                 Serialization format change: include backface_culling flag in TileDef
  82                 Added rightclickable field in nodedef
  83                 TOCLIENT_SPAWN_PARTICLE
  84                 TOCLIENT_ADD_PARTICLESPAWNER
  85                 TOCLIENT_DELETE_PARTICLESPAWNER
  86         PROTOCOL_VERSION 18:
  87                 damageGroups added to ToolCapabilities
  88                 sound_place added to ItemDefinition
  89         PROTOCOL_VERSION 19:
  90                 GENERIC_CMD_SET_PHYSICS_OVERRIDE
  91         PROTOCOL_VERSION 20:
  92                 TOCLIENT_HUDADD
  93                 TOCLIENT_HUDRM
  94                 TOCLIENT_HUDCHANGE
  95                 TOCLIENT_HUD_SET_FLAGS
  96         PROTOCOL_VERSION 21:
  97                 TOCLIENT_BREATH
  98                 TOSERVER_BREATH
  99                 range added to ItemDefinition
 100                 drowning, leveled and liquid_range added to ContentFeatures
 101                 stepheight and collideWithObjects added to object properties
 102                 version, heat and humidity transfer in MapBock
 103                 automatic_face_movement_dir and automatic_face_movement_dir_offset
 104                         added to object properties
 105         PROTOCOL_VERSION 22:
 106                 add swap_node
 107         PROTOCOL_VERSION 23:
 108                 Obsolete TOSERVER_RECEIVED_MEDIA
 109                 Server: Stop using TOSERVER_CLIENT_READY
 110         PROTOCOL_VERSION 24:
 111                 ContentFeatures version 7
 112                 ContentFeatures: change number of special tiles to 6 (CF_SPECIAL_COUNT)
 113         PROTOCOL_VERSION 25:
 114                 Rename TOCLIENT_ACCESS_DENIED to TOCLIENT_ACCESS_DENIED_LEGAGY
 115                 Rename TOCLIENT_DELETE_PARTICLESPAWNER to
 116                         TOCLIENT_DELETE_PARTICLESPAWNER_LEGACY
 117                 Rename TOSERVER_PASSWORD to TOSERVER_PASSWORD_LEGACY
 118                 Rename TOSERVER_INIT to TOSERVER_INIT_LEGACY
 119                 Rename TOCLIENT_INIT to TOCLIENT_INIT_LEGACY
 120                 Add TOCLIENT_ACCESS_DENIED new opcode (0x0A), using error codes
 121                         for standard error, keeping customisation possible. This
 122                         permit translation
 123                 Add TOCLIENT_DELETE_PARTICLESPAWNER (0x53), fixing the u16 read and
 124                         reading u32
 125                 Add new opcode TOSERVER_INIT for client presentation to server
 126                 Add new opcodes TOSERVER_FIRST_SRP, TOSERVER_SRP_BYTES_A,
 127                         TOSERVER_SRP_BYTES_M, TOCLIENT_SRP_BYTES_S_B
 128                         for the three supported auth mechanisms around srp
 129                 Add new opcodes TOCLIENT_ACCEPT_SUDO_MODE and TOCLIENT_DENY_SUDO_MODE
 130                         for sudo mode handling (auth mech generic way of changing password).
 131                 Add TOCLIENT_HELLO for presenting server to client after client
 132                         presentation
 133                 Add TOCLIENT_AUTH_ACCEPT to accept connection from client
 134                 Rename GENERIC_CMD_SET_ATTACHMENT to GENERIC_CMD_ATTACH_TO
 135         PROTOCOL_VERSION 26:
 136                 Add TileDef tileable_horizontal, tileable_vertical flags
 137         PROTOCOL_VERSION 27:
 138                 backface_culling: backwards compatibility for playing with
 139                 newer client on pre-27 servers.
 140                 Add nodedef v3 - connected nodeboxes
 141         PROTOCOL_VERSION 28:
 142                 CPT2_MESHOPTIONS
 143         PROTOCOL_VERSION 29:
 144                 Server doesn't accept TOSERVER_BREATH anymore
 145                 serialization of TileAnimation params changed
 146                 TAT_SHEET_2D
 147                 Removed client-sided chat perdiction
 148         PROTOCOL VERSION 30:
 149                 New ContentFeatures serialization version
 150                 Add node and tile color and palette
 151                 Fix plantlike visual_scale being applied squared and add compatibility
 152                         with pre-30 clients by sending sqrt(visual_scale)
 153         PROTOCOL VERSION 31:
 154                 Add tile overlay
 155                 Stop sending TOSERVER_CLIENT_READY
 156         PROTOCOL VERSION 32:
 157                 Add fading sounds
 158         PROTOCOL VERSION 33:
 159                 Add TOCLIENT_UPDATE_PLAYER_LIST and send the player list to the client,
 160                         instead of guessing based on the active object list.
 161         PROTOCOL VERSION 34:
 162                 Add sound pitch
 163 */
 164
 165 #define LATEST_PROTOCOL_VERSION 34
 166
 167 // Server's supported network protocol range
 168 #define SERVER_PROTOCOL_VERSION_MIN 24
 169 #define SERVER_PROTOCOL_VERSION_MAX LATEST_PROTOCOL_VERSION
 170
 171 // Client's supported network protocol range
 172 // The minimal version depends on whether
 173 // send_pre_v25_init is enabled or not
 174 #define CLIENT_PROTOCOL_VERSION_MIN 25
 175 #define CLIENT_PROTOCOL_VERSION_MIN_LEGACY 24
 176 #define CLIENT_PROTOCOL_VERSION_MAX LATEST_PROTOCOL_VERSION
 177
 178 // Constant that differentiates the protocol from random data and other protocols
 179 #define PROTOCOL_ID 0x4f457403
 180
 181 #define PASSWORD_SIZE 28       // Maximum password length. Allows for
 182                                // base64-encoded SHA-1 (27+\0).
 183
 184 #define FORMSPEC_API_VERSION 1
 185 #define FORMSPEC_VERSION_STRING "formspec_version[" TOSTRING(FORMSPEC_API_VERSION) "]"
 186
 187 #define TEXTURENAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_.-"
 188
 189 enum ToClientCommand
 190 {
 191         TOCLIENT_HELLO = 0x02,
 192         /*
 193                 Sent after TOSERVER_INIT.
 194
 195                 u8 deployed serialisation version
 196                 u16 deployed network compression mode
 197                 u16 deployed protocol version
 198                 u32 supported auth methods
 199                 std::string username that should be used for legacy hash (for proper casing)
 200         */
 201         TOCLIENT_AUTH_ACCEPT = 0x03,
 202         /*
 203                 Message from server to accept auth.
 204
 205                 v3s16 player's position + v3f(0,BS/2,0) floatToInt'd
 206                 u64 map seed
 207                 f1000 recommended send interval
 208                 u32 : supported auth methods for sudo mode
 209                       (where the user can change their password)
 210         */
 211         TOCLIENT_ACCEPT_SUDO_MODE = 0x04,
 212         /*
 213                 Sent to client to show it is in sudo mode now.
 214         */
 215         TOCLIENT_DENY_SUDO_MODE = 0x05,
 216         /*
 217                 Signals client that sudo mode auth failed.
 218         */
 219         TOCLIENT_INIT_LEGACY = 0x10,
 220         /*
 221                 Server's reply to TOSERVER_INIT.
 222                 Sent second after connected.
 223
 224                 [0] u16 TOSERVER_INIT
 225                 [2] u8 deployed version
 226                 [3] v3s16 player's position + v3f(0,BS/2,0) floatToInt'd
 227                 [12] u64 map seed (new as of 2011-02-27)
 228                 [20] f1000 recommended send interval (in seconds) (new as of 14)
 229
 230                 NOTE: The position in here is deprecated; position is
 231                       explicitly sent afterwards
 232         */
 233         TOCLIENT_ACCESS_DENIED = 0x0A,
 234         /*
 235                 u8 reason
 236                 std::string custom reason (if needed, otherwise "")
 237                 u8 (bool) reconnect
 238         */
 239         TOCLIENT_BLOCKDATA = 0x20, //TODO: Multiple blocks
 240         TOCLIENT_ADDNODE = 0x21,
 241         /*
 242                 v3s16 position
 243                 serialized mapnode
 244                 u8 keep_metadata // Added in protocol version 22
 245         */
 246         TOCLIENT_REMOVENODE = 0x22,
 247
 248         TOCLIENT_PLAYERPOS = 0x23, // Obsolete
 249         /*
 250                 [0] u16 command
 251                 // Followed by an arbitary number of these:
 252                 // Number is determined from packet length.
 253                 [N] u16 peer_id
 254                 [N+2] v3s32 position*100
 255                 [N+2+12] v3s32 speed*100
 256                 [N+2+12+12] s32 pitch*100
 257                 [N+2+12+12+4] s32 yaw*100
 258         */
 259
 260         TOCLIENT_PLAYERINFO = 0x24, // Obsolete
 261         /*
 262                 [0] u16 command
 263                 // Followed by an arbitary number of these:
 264                 // Number is determined from packet length.
 265                 [N] u16 peer_id
 266                 [N] char[20] name
 267         */
 268
 269         TOCLIENT_OPT_BLOCK_NOT_FOUND = 0x25, // Obsolete
 270
 271         TOCLIENT_SECTORMETA = 0x26, // Obsolete
 272         /*
 273                 [0] u16 command
 274                 [2] u8 sector count
 275                 [3...] v2s16 pos + sector metadata
 276         */
 277
 278         TOCLIENT_INVENTORY = 0x27,
 279         /*
 280                 [0] u16 command
 281                 [2] serialized inventory
 282         */
 283
 284         TOCLIENT_OBJECTDATA = 0x28, // Obsolete
 285         /*
 286                 Sent as unreliable.
 287
 288                 u16 number of player positions
 289                 for each player:
 290                         u16 peer_id
 291                         v3s32 position*100
 292                         v3s32 speed*100
 293                         s32 pitch*100
 294                         s32 yaw*100
 295                 u16 count of blocks
 296                 for each block:
 297                         v3s16 blockpos
 298                         block objects
 299         */
 300
 301         TOCLIENT_TIME_OF_DAY = 0x29,
 302         /*
 303                 u16 time (0-23999)
 304                 Added in a later version:
 305                 f1000 time_speed
 306         */
 307
 308         // (oops, there is some gap here)
 309
 310         TOCLIENT_CHAT_MESSAGE = 0x30,
 311         /*
 312                 u16 length
 313                 wstring message
 314         */
 315
 316         TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD = 0x31,
 317         /*
 318                 u16 count of removed objects
 319                 for all removed objects {
 320                         u16 id
 321                 }
 322                 u16 count of added objects
 323                 for all added objects {
 324                         u16 id
 325                         u8 type
 326                         u32 initialization data length
 327                         string initialization data
 328                 }
 329         */
 330
 331         TOCLIENT_ACTIVE_OBJECT_MESSAGES = 0x32,
 332         /*
 333                 for all objects
 334                 {
 335                         u16 id
 336                         u16 message length
 337                         string message
 338                 }
 339         */
 340
 341         TOCLIENT_HP = 0x33,
 342         /*
 343                 u8 hp
 344         */
 345
 346         TOCLIENT_MOVE_PLAYER = 0x34,
 347         /*
 348                 v3f1000 player position
 349                 f1000 player pitch
 350                 f1000 player yaw
 351         */
 352
 353         TOCLIENT_ACCESS_DENIED_LEGACY = 0x35,
 354         /*
 355                 u16 reason_length
 356                 wstring reason
 357         */
 358
 359         TOCLIENT_PLAYERITEM = 0x36, // Obsolete
 360         /*
 361                 u16 count of player items
 362                 for all player items {
 363                         u16 peer id
 364                         u16 length of serialized item
 365                         string serialized item
 366                 }
 367         */
 368
 369         TOCLIENT_DEATHSCREEN = 0x37,
 370         /*
 371                 u8 bool set camera point target
 372                 v3f1000 camera point target (to point the death cause or whatever)
 373         */
 374
 375         TOCLIENT_MEDIA = 0x38,
 376         /*
 377                 u16 total number of texture bunches
 378                 u16 index of this bunch
 379                 u32 number of files in this bunch
 380                 for each file {
 381                         u16 length of name
 382                         string name
 383                         u32 length of data
 384                         data
 385                 }
 386                 u16 length of remote media server url (if applicable)
 387                 string url
 388         */
 389
 390         TOCLIENT_TOOLDEF = 0x39,
 391         /*
 392                 u32 length of the next item
 393                 serialized ToolDefManager
 394         */
 395
 396         TOCLIENT_NODEDEF = 0x3a,
 397         /*
 398                 u32 length of the next item
 399                 serialized NodeDefManager
 400         */
 401
 402         TOCLIENT_CRAFTITEMDEF = 0x3b,
 403         /*
 404                 u32 length of the next item
 405                 serialized CraftiItemDefManager
 406         */
 407
 408         TOCLIENT_ANNOUNCE_MEDIA = 0x3c,
 409
 410         /*
 411                 u32 number of files
 412                 for each texture {
 413                         u16 length of name
 414                         string name
 415                         u16 length of sha1_digest
 416                         string sha1_digest
 417                 }
 418         */
 419
 420         TOCLIENT_ITEMDEF = 0x3d,
 421         /*
 422                 u32 length of next item
 423                 serialized ItemDefManager
 424         */
 425
 426         TOCLIENT_PLAY_SOUND = 0x3f,
 427         /*
 428                 s32 sound_id
 429                 u16 len
 430                 u8[len] sound name
 431                 s32 gain*1000
 432                 u8 type (0=local, 1=positional, 2=object)
 433                 s32[3] pos_nodes*10000
 434                 u16 object_id
 435                 u8 loop (bool)
 436         */
 437
 438         TOCLIENT_STOP_SOUND = 0x40,
 439         /*
 440                 s32 sound_id
 441         */
 442
 443         TOCLIENT_PRIVILEGES = 0x41,
 444         /*
 445                 u16 number of privileges
 446                 for each privilege
 447                         u16 len
 448                         u8[len] privilege
 449         */
 450
 451         TOCLIENT_INVENTORY_FORMSPEC = 0x42,
 452         /*
 453                 u32 len
 454                 u8[len] formspec
 455         */
 456
 457         TOCLIENT_DETACHED_INVENTORY = 0x43,
 458         /*
 459                 [0] u16 command
 460                 u16 len
 461                 u8[len] name
 462                 [2] serialized inventory
 463         */
 464
 465         TOCLIENT_SHOW_FORMSPEC = 0x44,
 466         /*
 467                 [0] u16 command
 468                 u32 len
 469                 u8[len] formspec
 470                 u16 len
 471                 u8[len] formname
 472         */
 473
 474         TOCLIENT_MOVEMENT = 0x45,
 475         /*
 476                 f1000 movement_acceleration_default
 477                 f1000 movement_acceleration_air
 478                 f1000 movement_acceleration_fast
 479                 f1000 movement_speed_walk
 480                 f1000 movement_speed_crouch
 481                 f1000 movement_speed_fast
 482                 f1000 movement_speed_climb
 483                 f1000 movement_speed_jump
 484                 f1000 movement_liquid_fluidity
 485                 f1000 movement_liquid_fluidity_smooth
 486                 f1000 movement_liquid_sink
 487                 f1000 movement_gravity
 488         */
 489
 490         TOCLIENT_SPAWN_PARTICLE = 0x46,
 491         /*
 492                 v3f1000 pos
 493                 v3f1000 velocity
 494                 v3f1000 acceleration
 495                 f1000 expirationtime
 496                 f1000 size
 497                 u8 bool collisiondetection
 498                 u8 bool vertical
 499                 u32 len
 500                 u8[len] texture
 501                 u8 collision_removal
 502         */
 503
 504         TOCLIENT_ADD_PARTICLESPAWNER = 0x47,
 505         /*
 506                 u16 amount
 507                 f1000 spawntime
 508                 v3f1000 minpos
 509                 v3f1000 maxpos
 510                 v3f1000 minvel
 511                 v3f1000 maxvel
 512                 v3f1000 minacc
 513                 v3f1000 maxacc
 514                 f1000 minexptime
 515                 f1000 maxexptime
 516                 f1000 minsize
 517                 f1000 maxsize
 518                 u8 bool collisiondetection
 519                 u8 bool vertical
 520                 u32 len
 521                 u8[len] texture
 522                 u32 id
 523                 u8 collision_removal
 524         */
 525
 526         TOCLIENT_DELETE_PARTICLESPAWNER_LEGACY = 0x48,
 527         /*
 528                 u16 id
 529         */
 530
 531         TOCLIENT_HUDADD = 0x49,
 532         /*
 533                 u32 id
 534                 u8 type
 535                 v2f1000 pos
 536                 u32 len
 537                 u8[len] name
 538                 v2f1000 scale
 539                 u32 len2
 540                 u8[len2] text
 541                 u32 number
 542                 u32 item
 543                 u32 dir
 544                 v2f1000 align
 545                 v2f1000 offset
 546                 v3f1000 world_pos
 547                 v2s32 size
 548         */
 549
 550         TOCLIENT_HUDRM = 0x4a,
 551         /*
 552                 u32 id
 553         */
 554
 555         TOCLIENT_HUDCHANGE = 0x4b,
 556         /*
 557                 u32 id
 558                 u8 stat
 559                 [v2f1000 data |
 560                  u32 len
 561                  u8[len] data |
 562                  u32 data]
 563         */
 564
 565         TOCLIENT_HUD_SET_FLAGS = 0x4c,
 566         /*
 567                 u32 flags
 568                 u32 mask
 569         */
 570
 571         TOCLIENT_HUD_SET_PARAM = 0x4d,
 572         /*
 573                 u16 param
 574                 u16 len
 575                 u8[len] value
 576         */
 577
 578         TOCLIENT_BREATH = 0x4e,
 579         /*
 580                 u16 breath
 581         */
 582
 583         TOCLIENT_SET_SKY = 0x4f,
 584         /*
 585                 u8[4] color (ARGB)
 586                 u8 len
 587                 u8[len] type
 588                 u16 count
 589                 foreach count:
 590                         u8 len
 591                         u8[len] param
 592                 u8 clouds (boolean)
 593         */
 594
 595         TOCLIENT_OVERRIDE_DAY_NIGHT_RATIO = 0x50,
 596         /*
 597                 u8 do_override (boolean)
 598                 u16 day-night ratio 0...65535
 599         */
 600
 601         TOCLIENT_LOCAL_PLAYER_ANIMATIONS = 0x51,
 602         /*
 603                 v2s32 stand/idle
 604                 v2s32 walk
 605                 v2s32 dig
 606                 v2s32 walk+dig
 607                 f1000 frame_speed
 608         */
 609
 610         TOCLIENT_EYE_OFFSET = 0x52,
 611         /*
 612                 v3f1000 first
 613                 v3f1000 third
 614         */
 615
 616         TOCLIENT_DELETE_PARTICLESPAWNER = 0x53,
 617         /*
 618                 u32 id
 619         */
 620
 621         TOCLIENT_CLOUD_PARAMS = 0x54,
 622         /*
 623                 f1000 density
 624                 u8[4] color_diffuse (ARGB)
 625                 u8[4] color_ambient (ARGB)
 626                 f1000 height
 627                 f1000 thickness
 628                 v2f1000 speed
 629         */
 630
 631         TOCLIENT_FADE_SOUND = 0x55,
 632         /*
 633                 s32 sound_id
 634                 float step
 635                 float gain
 636         */
 637         TOCLIENT_UPDATE_PLAYER_LIST = 0x56,
 638         /*
 639                 u8 type
 640                 u16 number of players
 641                 for each player
 642                         u16 len
 643                         u8[len] player name
 644         */
 645
 646         TOCLIENT_SRP_BYTES_S_B = 0x60,
 647         /*
 648                 Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP.
 649
 650                 std::string bytes_s
 651                 std::string bytes_B
 652         */
 653
 654         TOCLIENT_NUM_MSG_TYPES = 0x61,
 655 };
 656
 657 enum ToServerCommand
 658 {
 659         TOSERVER_INIT = 0x02,
 660         /*
 661                 Sent first after connected.
 662
 663                 u8 serialisation version (=SER_FMT_VER_HIGHEST_READ)
 664                 u16 supported network compression modes
 665                 u16 minimum supported network protocol version
 666                 u16 maximum supported network protocol version
 667                 std::string player name
 668         */
 669
 670         TOSERVER_INIT_LEGACY = 0x10,
 671         /*
 672                 Sent first after connected.
 673
 674                 [0] u16 TOSERVER_INIT_LEGACY
 675                 [2] u8 SER_FMT_VER_HIGHEST_READ
 676                 [3] u8[20] player_name
 677                 [23] u8[28] password (new in some version)
 678                 [51] u16 minimum supported network protocol version (added sometime)
 679                 [53] u16 maximum supported network protocol version (added later than the previous one)
 680         */
 681
 682         TOSERVER_INIT2 = 0x11,
 683         /*
 684                 Sent as an ACK for TOCLIENT_INIT.
 685                 After this, the server can send data.
 686
 687                 [0] u16 TOSERVER_INIT2
 688         */
 689
 690         TOSERVER_GETBLOCK=0x20, // Obsolete
 691         TOSERVER_ADDNODE = 0x21, // Obsolete
 692         TOSERVER_REMOVENODE = 0x22, // Obsolete
 693
 694         TOSERVER_PLAYERPOS = 0x23,
 695         /*
 696                 [0] u16 command
 697                 [2] v3s32 position*100
 698                 [2+12] v3s32 speed*100
 699                 [2+12+12] s32 pitch*100
 700                 [2+12+12+4] s32 yaw*100
 701                 [2+12+12+4+4] u32 keyPressed
 702                 [2+12+12+4+4+1] u8 fov*80
 703                 [2+12+12+4+4+4+1] u8 ceil(wanted_range / MAP_BLOCKSIZE)
 704         */
 705
 706         TOSERVER_GOTBLOCKS = 0x24,
 707         /*
 708                 [0] u16 command
 709                 [2] u8 count
 710                 [3] v3s16 pos_0
 711                 [3+6] v3s16 pos_1
 712                 ...
 713         */
 714
 715         TOSERVER_DELETEDBLOCKS = 0x25,
 716         /*
 717                 [0] u16 command
 718                 [2] u8 count
 719                 [3] v3s16 pos_0
 720                 [3+6] v3s16 pos_1
 721                 ...
 722         */
 723
 724         TOSERVER_ADDNODE_FROM_INVENTORY = 0x26, // Obsolete
 725         /*
 726                 [0] u16 command
 727                 [2] v3s16 pos
 728                 [8] u16 i
 729         */
 730
 731         TOSERVER_CLICK_OBJECT = 0x27, // Obsolete
 732         /*
 733                 length: 13
 734                 [0] u16 command
 735                 [2] u8 button (0=left, 1=right)
 736                 [3] v3s16 blockpos
 737                 [9] s16 id
 738                 [11] u16 item
 739         */
 740
 741         TOSERVER_GROUND_ACTION = 0x28, // Obsolete
 742         /*
 743                 length: 17
 744                 [0] u16 command
 745                 [2] u8 action
 746                 [3] v3s16 nodepos_undersurface
 747                 [9] v3s16 nodepos_abovesurface
 748                 [15] u16 item
 749                 actions:
 750                 0: start digging (from undersurface)
 751                 1: place block (to abovesurface)
 752                 2: stop digging (all parameters ignored)
 753                 3: digging completed
 754         */
 755
 756         TOSERVER_RELEASE = 0x29, // Obsolete
 757
 758         // (oops, there is some gap here)
 759
 760         TOSERVER_SIGNTEXT = 0x30, // Old signs, obsolete
 761         /*
 762                 v3s16 blockpos
 763                 s16 id
 764                 u16 textlen
 765                 textdata
 766         */
 767
 768         TOSERVER_INVENTORY_ACTION = 0x31,
 769         /*
 770                 See InventoryAction in inventorymanager.h
 771         */
 772
 773         TOSERVER_CHAT_MESSAGE = 0x32,
 774         /*
 775                 u16 length
 776                 wstring message
 777         */
 778
 779         TOSERVER_SIGNNODETEXT = 0x33, // obsolete
 780         /*
 781                 v3s16 p
 782                 u16 textlen
 783                 textdata
 784         */
 785
 786         TOSERVER_CLICK_ACTIVEOBJECT = 0x34, // Obsolete
 787         /*
 788                 length: 7
 789                 [0] u16 command
 790                 [2] u8 button (0=left, 1=right)
 791                 [3] u16 id
 792                 [5] u16 item
 793         */
 794
 795         TOSERVER_DAMAGE = 0x35,
 796         /*
 797                 u8 amount
 798         */
 799
 800         TOSERVER_PASSWORD_LEGACY = 0x36,
 801         /*
 802                 Sent to change password.
 803
 804                 [0] u16 TOSERVER_PASSWORD
 805                 [2] u8[28] old password
 806                 [30] u8[28] new password
 807         */
 808
 809         TOSERVER_PLAYERITEM = 0x37,
 810         /*
 811                 Sent to change selected item.
 812
 813                 [0] u16 TOSERVER_PLAYERITEM
 814                 [2] u16 item
 815         */
 816
 817         TOSERVER_RESPAWN = 0x38,
 818         /*
 819                 u16 TOSERVER_RESPAWN
 820         */
 821
 822         TOSERVER_INTERACT = 0x39,
 823         /*
 824                 [0] u16 command
 825                 [2] u8 action
 826                 [3] u16 item
 827                 [5] u32 length of the next item
 828                 [9] serialized PointedThing
 829                 actions:
 830                 0: start digging (from undersurface) or use
 831                 1: stop digging (all parameters ignored)
 832                 2: digging completed
 833                 3: place block or item (to abovesurface)
 834                 4: use item
 835
 836                 (Obsoletes TOSERVER_GROUND_ACTION and TOSERVER_CLICK_ACTIVEOBJECT.)
 837         */
 838
 839         TOSERVER_REMOVED_SOUNDS = 0x3a,
 840         /*
 841                 u16 len
 842                 s32[len] sound_id
 843         */
 844
 845         TOSERVER_NODEMETA_FIELDS = 0x3b,
 846         /*
 847                 v3s16 p
 848                 u16 len
 849                 u8[len] form name (reserved for future use)
 850                 u16 number of fields
 851                 for each field:
 852                         u16 len
 853                         u8[len] field name
 854                         u32 len
 855                         u8[len] field value
 856         */
 857
 858         TOSERVER_INVENTORY_FIELDS = 0x3c,
 859         /*
 860                 u16 len
 861                 u8[len] form name (reserved for future use)
 862                 u16 number of fields
 863                 for each field:
 864                         u16 len
 865                         u8[len] field name
 866                         u32 len
 867                         u8[len] field value
 868         */
 869
 870         TOSERVER_REQUEST_MEDIA = 0x40,
 871         /*
 872                 u16 number of files requested
 873                 for each file {
 874                         u16 length of name
 875                         string name
 876                 }
 877          */
 878
 879         TOSERVER_RECEIVED_MEDIA = 0x41,
 880         /*
 881                 <no payload data>
 882         */
 883
 884         TOSERVER_BREATH = 0x42, // Obsolete
 885         /*
 886                 u16 breath
 887         */
 888
 889         TOSERVER_CLIENT_READY = 0x43,
 890         /*
 891                 u8 major
 892                 u8 minor
 893                 u8 patch
 894                 u8 reserved
 895                 u16 len
 896                 u8[len] full_version_string
 897         */
 898
 899         TOSERVER_FIRST_SRP = 0x50,
 900         /*
 901                 Belonging to AUTH_MECHANISM_FIRST_SRP.
 902
 903                 std::string srp salt
 904                 std::string srp verification key
 905                 u8 is_empty (=1 if password is empty, 0 otherwise)
 906         */
 907
 908         TOSERVER_SRP_BYTES_A = 0x51,
 909         /*
 910                 Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP,
 911                         depending on current_login_based_on.
 912
 913                 std::string bytes_A
 914                 u8 current_login_based_on : on which version of the password's
 915                                             hash this login is based on (0 legacy hash,
 916                                             or 1 directly the password)
 917         */
 918
 919         TOSERVER_SRP_BYTES_M = 0x52,
 920         /*
 921                 Belonging to AUTH_MECHANISM_LEGACY_PASSWORD and AUTH_MECHANISM_SRP.
 922
 923                 std::string bytes_M
 924         */
 925
 926         TOSERVER_NUM_MSG_TYPES = 0x53,
 927 };
 928
 929 enum AuthMechanism
 930 {
 931         // reserved
 932         AUTH_MECHANISM_NONE = 0,
 933
 934         // SRP based on the legacy hash
 935         AUTH_MECHANISM_LEGACY_PASSWORD = 1 << 0,
 936
 937         // SRP based on the srp verification key
 938         AUTH_MECHANISM_SRP = 1 << 1,
 939
 940         // Establishes a srp verification key, for first login and password changing
 941         AUTH_MECHANISM_FIRST_SRP = 1 << 2,
 942 };
 943
 944 enum AccessDeniedCode {
 945         SERVER_ACCESSDENIED_WRONG_PASSWORD,
 946         SERVER_ACCESSDENIED_UNEXPECTED_DATA,
 947         SERVER_ACCESSDENIED_SINGLEPLAYER,
 948         SERVER_ACCESSDENIED_WRONG_VERSION,
 949         SERVER_ACCESSDENIED_WRONG_CHARS_IN_NAME,
 950         SERVER_ACCESSDENIED_WRONG_NAME,
 951         SERVER_ACCESSDENIED_TOO_MANY_USERS,
 952         SERVER_ACCESSDENIED_EMPTY_PASSWORD,
 953         SERVER_ACCESSDENIED_ALREADY_CONNECTED,
 954         SERVER_ACCESSDENIED_SERVER_FAIL,
 955         SERVER_ACCESSDENIED_CUSTOM_STRING,
 956         SERVER_ACCESSDENIED_SHUTDOWN,
 957         SERVER_ACCESSDENIED_CRASH,
 958         SERVER_ACCESSDENIED_MAX,
 959 };
 960
 961 enum NetProtoCompressionMode {
 962         NETPROTO_COMPRESSION_NONE = 0,
 963 };
 964
 965 const static std::string accessDeniedStrings[SERVER_ACCESSDENIED_MAX] = {
 966         "Invalid password",
 967         "Your client sent something the server didn't expect.  Try reconnecting or updating your client",
 968         "The server is running in simple singleplayer mode.  You cannot connect.",
 969         "Your client's version is not supported.\nPlease contact server administrator.",
 970         "Player name contains disallowed characters.",
 971         "Player name not allowed.",
 972         "Too many users.",
 973         "Empty passwords are disallowed.  Set a password and try again.",
 974         "Another client is connected with this name.  If your client closed unexpectedly, try again in a minute.",
 975         "Server authentication failed.  This is likely a server error.",
 976         "",
 977         "Server shutting down.",
 978         "This server has experienced an internal error. You will now be disconnected."
 979 };
 980
 981 enum PlayerListModifer: u8
 982 {
 983         PLAYER_LIST_INIT,
 984         PLAYER_LIST_ADD,
 985         PLAYER_LIST_REMOVE,
 986 };
 987
 988
 989 #endif