src/game/g_net.pas

   1 (* Copyright (C)  Doom 2D: Forever Developers
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, version 3 of the License ONLY.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  *)
  15 {$INCLUDE ../shared/a_modes.inc}
  16 unit g_net;
  17
  18 interface
  19
  20 uses
  21   e_log, e_msg, utils, ENet, Classes, md5, MAPDEF{$IFDEF USE_MINIUPNPC}, miniupnpc;{$ELSE};{$ENDIF}
  22
  23 const
  24   NET_PROTOCOL_VER = 186;
  25
  26   NET_MAXCLIENTS = 24;
  27   NET_CHANS = 12;
  28
  29   NET_CHAN_SERVICE = 0;
  30   NET_CHAN_IMPORTANT = 1;
  31   NET_CHAN_GAME = 2;
  32   NET_CHAN_PLAYER = 3;
  33   NET_CHAN_PLAYERPOS = 4;
  34   NET_CHAN_MONSTER = 5;
  35   NET_CHAN_MONSTERPOS = 6;
  36   NET_CHAN_LARGEDATA = 7;
  37   NET_CHAN_CHAT = 8;
  38   NET_CHAN_DOWNLOAD = 9;
  39   NET_CHAN_SHOTS = 10;
  40   NET_CHAN_DOWNLOAD_EX = 11;
  41
  42   NET_NONE = 0;
  43   NET_SERVER = 1;
  44   NET_CLIENT = 2;
  45
  46   NET_BUFSIZE = $FFFF;
  47   NET_PING_PORT = $DF2D;
  48
  49   NET_EVERYONE = -1;
  50
  51   NET_UNRELIABLE = 0;
  52   NET_RELIABLE = 1;
  53
  54   NET_DISC_NONE: enet_uint32 = 0;
  55   NET_DISC_PROTOCOL: enet_uint32 = 1;
  56   NET_DISC_VERSION: enet_uint32 = 2;
  57   NET_DISC_FULL: enet_uint32 = 3;
  58   NET_DISC_KICK: enet_uint32 = 4;
  59   NET_DISC_DOWN: enet_uint32 = 5;
  60   NET_DISC_PASSWORD: enet_uint32 = 6;
  61   NET_DISC_TEMPBAN: enet_uint32 = 7;
  62   NET_DISC_BAN: enet_uint32 = 8;
  63   NET_DISC_MAX: enet_uint32 = 8;
  64   NET_DISC_FILE_TIMEOUT: enet_uint32 = 13;
  65
  66   NET_STATE_NONE = 0;
  67   NET_STATE_AUTH = 1;
  68   NET_STATE_GAME = 2;
  69
  70   NET_CONNECT_TIMEOUT = 1000 * 10;
  71
  72   BANLIST_FILENAME = 'banlist.txt';
  73   NETDUMP_FILENAME = 'netdump';
  74
  75 type
  76   TNetMapResourceInfo = record
  77     wadName: AnsiString; // wad file name, without a path
  78     size: Integer; // wad file size (-1: size and hash are not known)
  79     hash: TMD5Digest; // wad hash
  80   end;
  81
  82   TNetMapResourceInfoArray = array of TNetMapResourceInfo;
  83
  84   TNetFileTransfer = record
  85     diskName: string;
  86     hash: TMD5Digest;
  87     stream: TStream;
  88     size: Integer; // file size in bytes
  89     chunkSize: Integer;
  90     lastSentChunk: Integer;
  91     lastAckChunk: Integer;
  92     lastAckTime: Int64; // msecs; if not "in progress", we're waiting for the first ack
  93     inProgress: Boolean;
  94     diskBuffer: PChar; // of `chunkSize` bytes
  95     resumed: Boolean;
  96   end;
  97
  98   TNetClient = record
  99     ID:       Byte;
 100     Used:     Boolean;
 101     State:    Byte;
 102     Peer:     pENetPeer;
 103     Player:   Word;
 104     RequestedFullUpdate: Boolean;
 105     WaitForFirstSpawn: Boolean; // set to `true` in server, used to spawn a player on first full state request
 106     RCONAuth: Boolean;
 107     Voted:    Boolean;
 108     Transfer: TNetFileTransfer; // only one transfer may be active
 109     NetOut:   array [0..1] of TMsg;
 110   end;
 111   TBanRecord = record
 112     IP: LongWord;
 113     Perm: Boolean;
 114   end;
 115   pTNetClient = ^TNetClient;
 116
 117   AByte = array of Byte;
 118
 119 var
 120   NetInitDone:     Boolean = False;
 121   NetMode:         Byte = NET_NONE;
 122   NetDump:         Boolean = False;
 123
 124   NetServerName:   string = 'Unnamed Server';
 125   NetPassword:     string = '';
 126   NetPort:         Word = 25666;
 127
 128   NetAllowRCON:    Boolean = False;
 129   NetRCONPassword: string = '';
 130
 131   NetTimeToUpdate:   Cardinal = 0;
 132   NetTimeToReliable: Cardinal = 0;
 133   NetTimeToMaster:   Cardinal = 0;
 134
 135   NetHost:       pENetHost = nil;
 136   NetPeer:       pENetPeer = nil;
 137   NetEvent:      ENetEvent;
 138   NetAddr:       ENetAddress;
 139
 140   NetPongAddr:   ENetAddress;
 141   NetPongSock:   ENetSocket = ENET_SOCKET_NULL;
 142
 143   NetUseMaster: Boolean = True;
 144   NetMasterList: string = 'mpms.doom2d.org:25665, deadsoftware.ru:25665';
 145
 146   NetClientIP:   string = '127.0.0.1';
 147   NetClientPort: Word   = 25666;
 148
 149   NetIn, NetOut: TMsg;
 150   NetBuf:        array [0..1] of TMsg;
 151
 152   NetClients:     array of TNetClient;
 153   NetClientCount: Byte = 0;
 154   NetMaxClients:  Byte = 255;
 155   NetBannedHosts: array of TBanRecord;
 156
 157   NetState:      Integer = NET_STATE_NONE;
 158
 159   NetMyID:       Integer = -1;
 160   NetPlrUID1:    Integer = -1;
 161   NetPlrUID2:    Integer = -1;
 162
 163   NetInterpLevel: Integer = 1;
 164   NetUpdateRate:  Cardinal = 0;  // as soon as possible
 165   NetRelupdRate:  Cardinal = 18; // around two times a second
 166   NetMasterRate:  Cardinal = 60000;
 167
 168   NetForcePlayerUpdate: Boolean = False;
 169   NetPredictSelf:       Boolean = True;
 170   NetForwardPorts:      Boolean = False;
 171
 172   NetGotEverything: Boolean = False;
 173   NetGotKeys:       Boolean = False;
 174
 175   NetDeafLevel: Integer = 0;
 176
 177 {$IFDEF USE_MINIUPNPC}
 178   NetPortForwarded: Word = 0;
 179   NetPongForwarded: Boolean = False;
 180   NetIGDControl: AnsiString;
 181   NetIGDService: TURLStr;
 182 {$ENDIF}
 183
 184   NetPortThread: TThreadID = NilThreadId;
 185
 186   NetDumpFile: TStream;
 187
 188   g_Res_received_map_start: Integer = 0; // set if we received "map change" event
 189
 190
 191 function  g_Net_Init(): Boolean;
 192 procedure g_Net_Cleanup();
 193 procedure g_Net_Free();
 194 procedure g_Net_Flush();
 195
 196 function  g_Net_Host(IPAddr: LongWord; Port: enet_uint16; MaxClients: Cardinal = 16): Boolean;
 197 procedure g_Net_Host_Die();
 198 procedure g_Net_Host_Send(ID: Integer; Reliable: Boolean; Chan: Byte = NET_CHAN_GAME);
 199 function  g_Net_Host_Update(): enet_size_t;
 200
 201 function  g_Net_Connect(IP: string; Port: enet_uint16): Boolean;
 202 procedure g_Net_Disconnect(Forced: Boolean = False);
 203 procedure g_Net_Client_Send(Reliable: Boolean; Chan: Byte = NET_CHAN_GAME);
 204 function  g_Net_Client_Update(): enet_size_t;
 205 function  g_Net_Client_UpdateWhileLoading(): enet_size_t;
 206
 207 function  g_Net_Client_ByName(Name: string): pTNetClient;
 208 function  g_Net_Client_ByPlayer(PID: Word): pTNetClient;
 209 function  g_Net_ClientName_ByID(ID: Integer): string;
 210
 211 procedure g_Net_SendData(Data: AByte; peer: pENetPeer; Reliable: Boolean; Chan: Byte = NET_CHAN_DOWNLOAD);
 212 //function  g_Net_Wait_Event(msgId: Word): TMemoryStream;
 213 //function g_Net_Wait_FileInfo (var tf: TNetFileTransfer; asMap: Boolean; out resList: TStringList): Integer;
 214
 215 function  IpToStr(IP: LongWord): string;
 216 function  StrToIp(IPstr: string; var IP: LongWord): Boolean;
 217
 218 function  g_Net_IsHostBanned(IP: LongWord; Perm: Boolean = False): Boolean;
 219 procedure g_Net_BanHost(IP: LongWord; Perm: Boolean = True); overload;
 220 procedure g_Net_BanHost(IP: string; Perm: Boolean = True); overload;
 221 function  g_Net_UnbanHost(IP: string): Boolean; overload;
 222 function  g_Net_UnbanHost(IP: LongWord): Boolean; overload;
 223 procedure g_Net_UnbanNonPermHosts();
 224 procedure g_Net_SaveBanList();
 225
 226 procedure g_Net_DumpStart();
 227 procedure g_Net_DumpSendBuffer();
 228 procedure g_Net_DumpRecvBuffer(Buf: penet_uint8; Len: LongWord);
 229 procedure g_Net_DumpEnd();
 230
 231 function g_Net_ForwardPorts(ForwardPongPort: Boolean = True): Boolean;
 232 procedure g_Net_UnforwardPorts();
 233
 234 function g_Net_UserRequestExit: Boolean;
 235
 236 function g_Net_Wait_MapInfo (var tf: TNetFileTransfer; var resList: TNetMapResourceInfoArray): Integer;
 237 function g_Net_RequestResFileInfo (resIndex: LongInt; out tf: TNetFileTransfer): Integer;
 238 function g_Net_AbortResTransfer (var tf: TNetFileTransfer): Boolean;
 239 function g_Net_ReceiveResourceFile (resIndex: LongInt; var tf: TNetFileTransfer; strm: TStream): Integer;
 240
 241 function g_Net_IsNetworkAvailable (): Boolean;
 242 procedure g_Net_InitLowLevel ();
 243 procedure g_Net_DeinitLowLevel ();
 244
 245 procedure NetServerCVars(P: SSArray);
 246
 247
 248 implementation
 249
 250 // *enet_host_service()*
 251 // fuck! https://www.mail-archive.com/enet-discuss@cubik.org/msg00852.html
 252 // tl;dr: on shitdows, we can get -1 sometimes, and it is *NOT* a failure.
 253 //        thank you, enet. let's ignore failures altogether then.
 254
 255 uses
 256   SysUtils,
 257   e_input, e_res,
 258   g_nethandler, g_netmsg, g_netmaster, g_player, g_window, g_console,
 259   g_main, g_game, g_language, g_weapons, ctypes, g_system, g_map;
 260
 261 const
 262   FILE_CHUNK_SIZE = 8192;
 263
 264 var
 265   enet_init_success: Boolean = false;
 266   g_Net_DownloadTimeout: Single;
 267   trans_omsg: TMsg;
 268
 269
 270 function g_Net_IsNetworkAvailable (): Boolean;
 271 begin
 272   result := enet_init_success;
 273 end;
 274
 275 procedure g_Net_InitLowLevel ();
 276   var v: ENetVersion;
 277 begin
 278   v := enet_linked_version();
 279   e_LogWritefln('ENet Version: %s.%s.%s', [ENET_VERSION_GET_MAJOR(v), ENET_VERSION_GET_MINOR(v), ENET_VERSION_GET_PATCH(v)]);
 280   if enet_init_success then raise Exception.Create('wuta?!');
 281   enet_init_success := (enet_initialize() = 0);
 282 end;
 283
 284 procedure g_Net_DeinitLowLevel ();
 285 begin
 286   if enet_init_success then
 287   begin
 288     enet_deinitialize();
 289     enet_init_success := false;
 290   end;
 291 end;
 292
 293
 294 //**************************************************************************
 295 //
 296 // SERVICE FUNCTIONS
 297 //
 298 //**************************************************************************
 299
 300 procedure clearNetClientTransfers (var nc: TNetClient);
 301 begin
 302   nc.Transfer.stream.Free;
 303   nc.Transfer.diskName := ''; // just in case
 304   if (nc.Transfer.diskBuffer <> nil) then FreeMem(nc.Transfer.diskBuffer);
 305   nc.Transfer.stream := nil;
 306   nc.Transfer.diskBuffer := nil;
 307 end;
 308
 309
 310 procedure clearNetClient (var nc: TNetClient);
 311 begin
 312   clearNetClientTransfers(nc);
 313 end;
 314
 315
 316 procedure clearNetClients (clearArray: Boolean);
 317 var
 318   f: Integer;
 319 begin
 320   for f := Low(NetClients) to High(NetClients) do clearNetClient(NetClients[f]);
 321   if (clearArray) then SetLength(NetClients, 0);
 322 end;
 323
 324
 325 function g_Net_UserRequestExit (): Boolean;
 326 begin
 327   Result := {e_KeyPressed(IK_SPACE) or}
 328             e_KeyPressed(IK_ESCAPE) or
 329             e_KeyPressed(VK_ESCAPE) or
 330             e_KeyPressed(JOY0_JUMP) or
 331             e_KeyPressed(JOY1_JUMP) or
 332             e_KeyPressed(JOY2_JUMP) or
 333             e_KeyPressed(JOY3_JUMP)
 334 end;
 335
 336
 337 //**************************************************************************
 338 //
 339 // file transfer declaraions and host packet processor
 340 //
 341 //**************************************************************************
 342
 343 const
 344   // server packet type
 345   NTF_SERVER_DONE = 10; // done with this file
 346   NTF_SERVER_FILE_INFO = 11; // sent after client request
 347   NTF_SERVER_CHUNK = 12; // next chunk; chunk number follows
 348   NTF_SERVER_ABORT = 13; // server abort
 349   NTF_SERVER_MAP_INFO = 14;
 350
 351   // client packet type
 352   NTF_CLIENT_MAP_REQUEST = 100; // map file request; also, returns list of additional wads to download
 353   NTF_CLIENT_FILE_REQUEST = 101; // resource file request (by index)
 354   NTF_CLIENT_ABORT = 102; // do not send requested file, or abort current transfer
 355   NTF_CLIENT_START = 103; // start transfer; client may resume download by sending non-zero starting chunk
 356   NTF_CLIENT_ACK = 104; // chunk ack; chunk number follows
 357
 358
 359 // disconnect client due to some file transfer error
 360 procedure killClientByFT (var nc: TNetClient);
 361 begin
 362   e_LogWritefln('disconnected client #%d due to file transfer error', [nc.ID], TMsgType.Warning);
 363   enet_peer_disconnect(nc.Peer, NET_DISC_FILE_TIMEOUT);
 364   clearNetClientTransfers(nc);
 365   g_Net_Slist_ServerPlayerLeaves();
 366 end;
 367
 368
 369 // send file transfer message from server to client
 370 function ftransSendServerMsg (var nc: TNetClient; var m: TMsg): Boolean;
 371 var
 372   pkt: PENetPacket;
 373 begin
 374   result := false;
 375   if (m.CurSize < 1) then exit;
 376   pkt := enet_packet_create(m.Data, m.CurSize, ENET_PACKET_FLAG_RELIABLE);
 377   if not Assigned(pkt) then begin killClientByFT(nc); exit; end;
 378   if (enet_peer_send(nc.Peer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then begin killClientByFT(nc); exit; end;
 379   result := true;
 380 end;
 381
 382
 383 // send file transfer message from client to server
 384 function ftransSendClientMsg (var m: TMsg): Boolean;
 385 var
 386   pkt: PENetPacket;
 387 begin
 388   result := false;
 389   if (m.CurSize < 1) then exit;
 390   pkt := enet_packet_create(m.Data, m.CurSize, ENET_PACKET_FLAG_RELIABLE);
 391   if not Assigned(pkt) then exit;
 392   if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
 393   result := true;
 394 end;
 395
 396
 397 // file chunk sender
 398 procedure ProcessChunkSend (var nc: TNetClient);
 399 var
 400   tf: ^TNetFileTransfer;
 401   ct: Int64;
 402   chunks: Integer;
 403   rd: Integer;
 404 begin
 405   tf := @nc.Transfer;
 406   if (tf.stream = nil) then exit;
 407   ct := GetTimerMS();
 408   // arbitrary timeout number
 409   if (ct-tf.lastAckTime >= 5000) then
 410   begin
 411     killClientByFT(nc);
 412     exit;
 413   end;
 414   // check if we need to send something
 415   if (not tf.inProgress) then exit; // waiting for the initial ack
 416   // ok, we're sending chunks
 417   if (tf.lastAckChunk <> tf.lastSentChunk) then exit;
 418   Inc(tf.lastSentChunk);
 419   // do it one chunk at a time; client ack will advance our chunk counter
 420   chunks := (tf.size+tf.chunkSize-1) div tf.chunkSize;
 421
 422   if (tf.lastSentChunk > chunks) then
 423   begin
 424     killClientByFT(nc);
 425     exit;
 426   end;
 427
 428   trans_omsg.Clear();
 429   if (tf.lastSentChunk = chunks) then
 430   begin
 431     // we're done with this file
 432     e_LogWritefln('download: client #%d, DONE sending chunks #%d/#%d', [nc.ID, tf.lastSentChunk, chunks]);
 433     trans_omsg.Write(Byte(NTF_SERVER_DONE));
 434     clearNetClientTransfers(nc);
 435   end
 436   else
 437   begin
 438     // packet type
 439     trans_omsg.Write(Byte(NTF_SERVER_CHUNK));
 440     trans_omsg.Write(LongInt(tf.lastSentChunk));
 441     // read chunk
 442     rd := tf.size-(tf.lastSentChunk*tf.chunkSize);
 443     if (rd > tf.chunkSize) then rd := tf.chunkSize;
 444     trans_omsg.Write(LongInt(rd));
 445     //e_LogWritefln('download: client #%d, sending chunk #%d/#%d (%d bytes)', [nc.ID, tf.lastSentChunk, chunks, rd]);
 446     //FIXME: check for errors here
 447     try
 448       tf.stream.Seek(tf.lastSentChunk*tf.chunkSize, soFromBeginning);
 449       tf.stream.ReadBuffer(tf.diskBuffer^, rd);
 450       trans_omsg.WriteData(tf.diskBuffer, rd);
 451     except // sorry
 452       killClientByFT(nc);
 453       exit;
 454     end;
 455   end;
 456   // send packet
 457   ftransSendServerMsg(nc, trans_omsg);
 458 end;
 459
 460
 461 // server file transfer packet processor
 462 // received packet is in `NetEvent`
 463 procedure ProcessDownloadExPacket ();
 464 var
 465   f: Integer;
 466   nc: ^TNetClient;
 467   nid: Integer = -1;
 468   msg: TMsg;
 469   cmd: Byte;
 470   tf: ^TNetFileTransfer;
 471   fname: string;
 472   chunk: Integer;
 473   ridx: Integer;
 474   dfn: AnsiString;
 475   md5: TMD5Digest;
 476   //st: TStream;
 477   size: LongInt;
 478   fi: TDiskFileInfo;
 479 begin
 480   // find client index by peer
 481   for f := Low(NetClients) to High(NetClients) do
 482   begin
 483     if (not NetClients[f].Used) then continue;
 484     if (NetClients[f].Peer = NetEvent.peer) then
 485     begin
 486       nid := f;
 487       break;
 488     end;
 489   end;
 490   //e_LogWritefln('RECEIVE: dlpacket; client=%d (datalen=%u)', [nid, NetEvent.packet^.dataLength]);
 491
 492   if (nid < 0) then exit; // wtf?!
 493   nc := @NetClients[nid];
 494
 495   if (NetEvent.packet^.dataLength = 0) then
 496   begin
 497     killClientByFT(nc^);
 498     exit;
 499   end;
 500
 501   tf := @NetClients[nid].Transfer;
 502   tf.lastAckTime := GetTimerMS();
 503
 504   cmd := Byte(NetEvent.packet^.data^);
 505   //e_LogWritefln('RECEIVE:   nid=%d; cmd=%u', [nid, cmd]);
 506   case cmd of
 507     NTF_CLIENT_FILE_REQUEST: // file request
 508       begin
 509         if (tf.stream <> nil) then
 510         begin
 511           killClientByFT(nc^);
 512           exit;
 513         end;
 514         if (NetEvent.packet^.dataLength < 2) then
 515         begin
 516           killClientByFT(nc^);
 517           exit;
 518         end;
 519         // new transfer request; build packet
 520         if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
 521         begin
 522           killClientByFT(nc^);
 523           exit;
 524         end;
 525         // get resource index
 526         ridx := msg.ReadLongInt();
 527         if (ridx < -1) or (ridx >= length(gExternalResources)) then
 528         begin
 529           e_LogWritefln('Invalid resource index %d', [ridx], TMsgType.Warning);
 530           killClientByFT(nc^);
 531           exit;
 532         end;
 533         if (ridx < 0) then fname := gGameSettings.WAD else fname := gExternalResources[ridx].diskName;
 534         if (length(fname) = 0) then
 535         begin
 536           e_WriteLog('Invalid filename: '+fname, TMsgType.Warning);
 537           killClientByFT(nc^);
 538           exit;
 539         end;
 540         tf.diskName := findDiskWad(fname);
 541         if (length(tf.diskName) = 0) then
 542         begin
 543           e_LogWritefln('NETWORK: file "%s" not found!', [fname], TMsgType.Fatal);
 544           killClientByFT(nc^);
 545           exit;
 546         end;
 547         // calculate hash
 548         //tf.hash := MD5File(tf.diskName);
 549         if (ridx < 0) then tf.hash := gWADHash else tf.hash := gExternalResources[ridx].hash;
 550         // create file stream
 551         tf.diskName := findDiskWad(fname);
 552         try
 553           tf.stream := openDiskFileRO(tf.diskName);
 554         except
 555           tf.stream := nil;
 556         end;
 557         if (tf.stream = nil) then
 558         begin
 559           e_WriteLog(Format('NETWORK: file "%s" not found!', [fname]), TMsgType.Fatal);
 560           killClientByFT(nc^);
 561           exit;
 562         end;
 563         e_LogWritefln('client #%d requested resource #%d (file is `%s` : `%s`)', [nc.ID, ridx, fname, tf.diskName]);
 564         tf.size := tf.stream.size;
 565         tf.chunkSize := FILE_CHUNK_SIZE; // arbitrary
 566         tf.lastSentChunk := -1;
 567         tf.lastAckChunk := -1;
 568         tf.lastAckTime := GetTimerMS();
 569         tf.inProgress := False; // waiting for the first ACK or for the cancel
 570         GetMem(tf.diskBuffer, tf.chunkSize);
 571         // sent file info message
 572         trans_omsg.Clear();
 573         trans_omsg.Write(Byte(NTF_SERVER_FILE_INFO));
 574         trans_omsg.Write(tf.hash);
 575         trans_omsg.Write(tf.size);
 576         trans_omsg.Write(tf.chunkSize);
 577         trans_omsg.Write(ExtractFileName(fname));
 578         if not ftransSendServerMsg(nc^, trans_omsg) then exit;
 579       end;
 580     NTF_CLIENT_ABORT: // do not send requested file, or abort current transfer
 581       begin
 582         e_LogWritefln('client #%d aborted file transfer', [nc.ID]);
 583         clearNetClientTransfers(nc^);
 584       end;
 585     NTF_CLIENT_START: // start transfer; client may resume download by sending non-zero starting chunk
 586       begin
 587         if not Assigned(tf.stream) then
 588         begin
 589           killClientByFT(nc^);
 590           exit;
 591         end;
 592         if (tf.lastSentChunk <> -1) or (tf.lastAckChunk <> -1) or (tf.inProgress) then
 593         begin
 594           // double ack, get lost
 595           killClientByFT(nc^);
 596           exit;
 597         end;
 598         if (NetEvent.packet^.dataLength < 2) then
 599         begin
 600           killClientByFT(nc^);
 601           exit;
 602         end;
 603         // build packet
 604         if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
 605         begin
 606           killClientByFT(nc^);
 607           exit;
 608         end;
 609         chunk := msg.ReadLongInt();
 610         if (chunk < 0) or (chunk > (tf.size+tf.chunkSize-1) div tf.chunkSize) then
 611         begin
 612           killClientByFT(nc^);
 613           exit;
 614         end;
 615         e_LogWritefln('client #%d started file transfer from chunk %d', [nc.ID, chunk]);
 616         // start sending chunks
 617         tf.inProgress := True;
 618         tf.lastSentChunk := chunk-1;
 619         tf.lastAckChunk := chunk-1;
 620         ProcessChunkSend(nc^);
 621       end;
 622     NTF_CLIENT_ACK: // chunk ack; chunk number follows
 623       begin
 624         if not Assigned(tf.stream) then
 625         begin
 626           killClientByFT(nc^);
 627           exit;
 628         end;
 629         if (tf.lastSentChunk < 0) or (not tf.inProgress) then
 630         begin
 631           // double ack, get lost
 632           killClientByFT(nc^);
 633           exit;
 634         end;
 635         if (NetEvent.packet^.dataLength < 2) then
 636         begin
 637           killClientByFT(nc^);
 638           exit;
 639         end;
 640         // build packet
 641         if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
 642         begin
 643           killClientByFT(nc^);
 644           exit;
 645         end;
 646         chunk := msg.ReadLongInt();
 647         if (chunk < 0) or (chunk > (tf.size+tf.chunkSize-1) div tf.chunkSize) then
 648         begin
 649           killClientByFT(nc^);
 650           exit;
 651         end;
 652         // do it this way, so client may seek, or request retransfers for some reason
 653         tf.lastAckChunk := chunk;
 654         tf.lastSentChunk := chunk;
 655         //e_LogWritefln('client #%d acked file transfer chunk %d', [nc.ID, chunk]);
 656         ProcessChunkSend(nc^);
 657       end;
 658     NTF_CLIENT_MAP_REQUEST:
 659       begin
 660         e_LogWritefln('client #%d requested map info', [nc.ID]);
 661         trans_omsg.Clear();
 662         dfn := findDiskWad(gGameSettings.WAD);
 663         if (dfn = '') then dfn := '!wad_not_found!.wad'; //FIXME
 664         //md5 := MD5File(dfn);
 665         md5 := gWADHash;
 666         if (not GetDiskFileInfo(dfn, fi)) then
 667         begin
 668           e_LogWritefln('client #%d requested map info, but i cannot get file info', [nc.ID]);
 669           killClientByFT(nc^);
 670           exit;
 671         end;
 672         size := fi.size;
 673         {
 674         st := openDiskFileRO(dfn);
 675         if not assigned(st) then exit; //wtf?!
 676         size := st.size;
 677         st.Free;
 678         }
 679         // packet type
 680         trans_omsg.Write(Byte(NTF_SERVER_MAP_INFO));
 681         // map wad name
 682         trans_omsg.Write(ExtractFileName(gGameSettings.WAD));
 683         // map wad md5
 684         trans_omsg.Write(md5);
 685         // map wad size
 686         trans_omsg.Write(size);
 687         // number of external resources for map
 688         trans_omsg.Write(LongInt(length(gExternalResources)));
 689         // external resource names
 690         for f := 0 to High(gExternalResources) do
 691         begin
 692           // old style packet
 693           //trans_omsg.Write(ExtractFileName(gExternalResources[f])); // GameDir+'/wads/'+ResList.Strings[i]
 694           // new style packet
 695           trans_omsg.Write('!');
 696           trans_omsg.Write(LongInt(gExternalResources[f].size));
 697           trans_omsg.Write(gExternalResources[f].hash);
 698           trans_omsg.Write(ExtractFileName(gExternalResources[f].diskName));
 699         end;
 700         // send packet
 701         if not ftransSendServerMsg(nc^, trans_omsg) then exit;
 702       end;
 703     else
 704       begin
 705         killClientByFT(nc^);
 706         exit;
 707       end;
 708   end;
 709 end;
 710
 711
 712 //**************************************************************************
 713 //
 714 // file transfer crap (both client and server)
 715 //
 716 //**************************************************************************
 717
 718 function getNewTimeoutEnd (): Int64;
 719 begin
 720   result := GetTimerMS();
 721   if (g_Net_DownloadTimeout <= 0) then
 722   begin
 723     result := result+1000*60*3; // 3 minutes
 724   end
 725   else
 726   begin
 727     result := result+trunc(g_Net_DownloadTimeout*1000);
 728   end;
 729 end;
 730
 731
 732 // send map request to server, and wait for "map info" server reply
 733 //
 734 // returns `false` on error or user abort
 735 // fills:
 736 //    diskName: map wad file name (without a path)
 737 //    hash: map wad hash
 738 //    size: map wad size
 739 //    chunkSize: set too
 740 //    resList: list of resource wads
 741 // returns:
 742 //  <0 on error
 743 //   0 on success
 744 //   1 on user abort
 745 //   2 on server abort
 746 // for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
 747 function g_Net_Wait_MapInfo (var tf: TNetFileTransfer; var resList: TNetMapResourceInfoArray): Integer;
 748 var
 749   ev: ENetEvent;
 750   rMsgId: Byte;
 751   Ptr: Pointer;
 752   msg: TMsg;
 753   freePacket: Boolean = false;
 754   ct, ett: Int64;
 755   status: cint;
 756   s: AnsiString;
 757   rc, f: LongInt;
 758   ri: ^TNetMapResourceInfo;
 759 begin
 760   SetLength(resList, 0);
 761
 762   // send request
 763   trans_omsg.Clear();
 764   trans_omsg.Write(Byte(NTF_CLIENT_MAP_REQUEST));
 765   if not ftransSendClientMsg(trans_omsg) then begin result := -1; exit; end;
 766
 767   FillChar(ev, SizeOf(ev), 0);
 768   Result := -1;
 769   try
 770     ett := getNewTimeoutEnd();
 771     repeat
 772       status := enet_host_service(NetHost, @ev, 300);
 773       {
 774       if (status < 0) then
 775       begin
 776         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
 777         Result := -1;
 778         exit;
 779       end;
 780       }
 781       if (status <= 0) then
 782       begin
 783         // check for timeout
 784         ct := GetTimerMS();
 785         if (ct >= ett) then
 786         begin
 787           g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
 788           Result := -1;
 789           exit;
 790         end;
 791       end
 792       else
 793       begin
 794         // some event
 795         case ev.kind of
 796           ENET_EVENT_TYPE_RECEIVE:
 797             begin
 798               freePacket := true;
 799               if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
 800               begin
 801                 //e_LogWritefln('g_Net_Wait_MapInfo: skip message from non-transfer channel', []);
 802                 freePacket := false;
 803                 g_Net_Client_HandlePacket(ev.packet, g_Net_ClientLightMsgHandler);
 804                 if (g_Res_received_map_start < 0) then begin result := -666; exit; end;
 805               end
 806               else
 807               begin
 808                 ett := getNewTimeoutEnd();
 809                 if (ev.packet.dataLength < 1) then
 810                 begin
 811                   e_LogWritefln('g_Net_Wait_MapInfo: invalid server packet (no data)', []);
 812                   Result := -1;
 813                   exit;
 814                 end;
 815                 Ptr := ev.packet^.data;
 816                 rMsgId := Byte(Ptr^);
 817                 e_LogWritefln('g_Net_Wait_MapInfo: got message %u from server (dataLength=%u)', [rMsgId, ev.packet^.dataLength]);
 818                 if (rMsgId = NTF_SERVER_FILE_INFO) then
 819                 begin
 820                   e_LogWritefln('g_Net_Wait_MapInfo: waiting for map info reply, but got file info reply', []);
 821                   Result := -1;
 822                   exit;
 823                 end
 824                 else if (rMsgId = NTF_SERVER_ABORT) then
 825                 begin
 826                   e_LogWritefln('g_Net_Wait_MapInfo: server aborted transfer', []);
 827                   Result := 2;
 828                   exit;
 829                 end
 830                 else if (rMsgId = NTF_SERVER_MAP_INFO) then
 831                 begin
 832                   e_LogWritefln('g_Net_Wait_MapInfo: creating map info packet...', []);
 833                   if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
 834                   e_LogWritefln('g_Net_Wait_MapInfo: parsing map info packet (rd=%d; max=%d)...', [msg.ReadCount, msg.MaxSize]);
 835                   SetLength(resList, 0); // just in case
 836                   // map wad name
 837                   tf.diskName := msg.ReadString();
 838                   e_LogWritefln('g_Net_Wait_MapInfo: map wad is `%s`', [tf.diskName]);
 839                   // map wad md5
 840                   tf.hash := msg.ReadMD5();
 841                   // map wad size
 842                   tf.size := msg.ReadLongInt();
 843                   e_LogWritefln('g_Net_Wait_MapInfo: map wad size is %d', [tf.size]);
 844                   // number of external resources for map
 845                   rc := msg.ReadLongInt();
 846                   if (rc < 0) or (rc > 1024) then
 847                   begin
 848                     e_LogWritefln('g_Net_Wait_Event: invalid number of map external resources (%d)', [rc]);
 849                     Result := -1;
 850                     exit;
 851                   end;
 852                   e_LogWritefln('g_Net_Wait_MapInfo: map external resource count is %d', [rc]);
 853                   SetLength(resList, rc);
 854                   // external resource names
 855                   for f := 0 to rc-1 do
 856                   begin
 857                     ri := @resList[f];
 858                     s := msg.ReadString();
 859                     if (length(s) = 0) then begin result := -1; exit; end;
 860                     if (s = '!') then
 861                     begin
 862                       // extended packet
 863                       ri.size := msg.ReadLongInt();
 864                       ri.hash := msg.ReadMD5();
 865                       ri.wadName := ExtractFileName(msg.ReadString());
 866                       if (length(ri.wadName) = 0) or (ri.size < 0) then begin result := -1; exit; end;
 867                     end
 868                     else
 869                     begin
 870                       // old-style packet, only name
 871                       ri.wadName := ExtractFileName(s);
 872                       if (length(ri.wadName) = 0) then begin result := -1; exit; end;
 873                       ri.size := -1; // unknown
 874                     end;
 875                   end;
 876                   e_LogWritefln('g_Net_Wait_MapInfo: got map info', []);
 877                   Result := 0; // success
 878                   exit;
 879                 end
 880                 else
 881                 begin
 882                   e_LogWritefln('g_Net_Wait_Event: invalid server packet type', []);
 883                   Result := -1;
 884                   exit;
 885                 end;
 886               end;
 887             end;
 888           ENET_EVENT_TYPE_DISCONNECT:
 889             begin
 890               if (ev.data <= NET_DISC_MAX) then
 891                 g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
 892               Result := -1;
 893               exit;
 894             end;
 895           else
 896             begin
 897               g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
 898               result := -1;
 899               exit;
 900             end;
 901         end;
 902         if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
 903       end;
 904       ProcessLoading();
 905       if g_Net_UserRequestExit() then
 906       begin
 907         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
 908         Result := 1;
 909         exit;
 910       end;
 911     until false;
 912   finally
 913     if (freePacket) then enet_packet_destroy(ev.packet);
 914   end;
 915 end;
 916
 917
 918 // send file request to server, and wait for server reply
 919 //
 920 // returns `false` on error or user abort
 921 // fills:
 922 //    diskName (actually, base name)
 923 //    hash
 924 //    size
 925 //    chunkSize
 926 // returns:
 927 //  <0 on error
 928 //   0 on success
 929 //   1 on user abort
 930 //   2 on server abort
 931 // for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
 932 function g_Net_RequestResFileInfo (resIndex: LongInt; out tf: TNetFileTransfer): Integer;
 933 var
 934   ev: ENetEvent;
 935   rMsgId: Byte;
 936   Ptr: Pointer;
 937   msg: TMsg;
 938   freePacket: Boolean = false;
 939   ct, ett: Int64;
 940   status: cint;
 941 begin
 942   // send request
 943   trans_omsg.Clear();
 944   trans_omsg.Write(Byte(NTF_CLIENT_FILE_REQUEST));
 945   trans_omsg.Write(resIndex);
 946   if not ftransSendClientMsg(trans_omsg) then begin result := -1; exit; end;
 947
 948   FillChar(ev, SizeOf(ev), 0);
 949   Result := -1;
 950   try
 951     ett := getNewTimeoutEnd();
 952     repeat
 953       status := enet_host_service(NetHost, @ev, 300);
 954       {
 955       if (status < 0) then
 956       begin
 957         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
 958         Result := -1;
 959         exit;
 960       end;
 961       }
 962       if (status <= 0) then
 963       begin
 964         // check for timeout
 965         ct := GetTimerMS();
 966         if (ct >= ett) then
 967         begin
 968           g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
 969           Result := -1;
 970           exit;
 971         end;
 972       end
 973       else
 974       begin
 975         // some event
 976         case ev.kind of
 977           ENET_EVENT_TYPE_RECEIVE:
 978             begin
 979               freePacket := true;
 980               if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
 981               begin
 982                 //e_LogWriteln('g_Net_Wait_Event: skip message from non-transfer channel');
 983                 freePacket := false;
 984                 g_Net_Client_HandlePacket(ev.packet, g_Net_ClientLightMsgHandler);
 985                 if (g_Res_received_map_start < 0) then begin result := -666; exit; end;
 986               end
 987               else
 988               begin
 989                 ett := getNewTimeoutEnd();
 990                 if (ev.packet.dataLength < 1) then
 991                 begin
 992                   e_LogWriteln('g_Net_Wait_Event: invalid server packet (no data)');
 993                   Result := -1;
 994                   exit;
 995                 end;
 996                 Ptr := ev.packet^.data;
 997                 rMsgId := Byte(Ptr^);
 998                 e_LogWritefln('received transfer packet with id %d (%u bytes)', [rMsgId, ev.packet^.dataLength]);
 999                 if (rMsgId = NTF_SERVER_FILE_INFO) then
1000                 begin
1001                   if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
1002                   tf.hash := msg.ReadMD5();
1003                   tf.size := msg.ReadLongInt();
1004                   tf.chunkSize := msg.ReadLongInt();
1005                   tf.diskName := ExtractFileName(msg.readString());
1006                   if (tf.size < 0) or (tf.chunkSize <> FILE_CHUNK_SIZE) or (length(tf.diskName) = 0) then
1007                   begin
1008                     e_LogWritefln('g_Net_RequestResFileInfo: invalid file info packet', []);
1009                     Result := -1;
1010                     exit;
1011                   end;
1012                   e_LogWritefln('got file info for resource #%d: size=%d; name=%s', [resIndex, tf.size, tf.diskName]);
1013                   Result := 0; // success
1014                   exit;
1015                 end
1016                 else if (rMsgId = NTF_SERVER_ABORT) then
1017                 begin
1018                   e_LogWriteln('g_Net_RequestResFileInfo: server aborted transfer');
1019                   Result := 2;
1020                   exit;
1021                 end
1022                 else if (rMsgId = NTF_SERVER_MAP_INFO) then
1023                 begin
1024                   e_LogWriteln('g_Net_RequestResFileInfo: waiting for map info reply, but got file info reply');
1025                   Result := -1;
1026                   exit;
1027                 end
1028                 else
1029                 begin
1030                   e_LogWriteln('g_Net_RequestResFileInfo: invalid server packet type');
1031                   Result := -1;
1032                   exit;
1033                 end;
1034               end;
1035             end;
1036           ENET_EVENT_TYPE_DISCONNECT:
1037             begin
1038               if (ev.data <= NET_DISC_MAX) then
1039                 g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
1040               Result := -1;
1041               exit;
1042             end;
1043           else
1044             begin
1045               g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
1046               result := -1;
1047               exit;
1048             end;
1049         end;
1050         if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
1051       end;
1052       ProcessLoading();
1053       if g_Net_UserRequestExit() then
1054       begin
1055         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
1056         Result := 1;
1057         exit;
1058       end;
1059     until false;
1060   finally
1061     if (freePacket) then enet_packet_destroy(ev.packet);
1062   end;
1063 end;
1064
1065
1066 // call this to cancel file transfer requested by `g_Net_RequestResFileInfo()`
1067 function g_Net_AbortResTransfer (var tf: TNetFileTransfer): Boolean;
1068 begin
1069   result := false;
1070   e_LogWritefln('aborting file transfer...', []);
1071   // send request
1072   trans_omsg.Clear();
1073   trans_omsg.Write(Byte(NTF_CLIENT_ABORT));
1074   result := ftransSendClientMsg(trans_omsg);
1075   if result then enet_host_flush(NetHost);
1076 end;
1077
1078
1079 // call this to start file transfer requested by `g_Net_RequestResFileInfo()`
1080 //
1081 // returns `false` on error or user abort
1082 // fills:
1083 //    hash
1084 //    size
1085 //    chunkSize
1086 // returns:
1087 //  <0 on error
1088 //   0 on success
1089 //   1 on user abort
1090 //   2 on server abort
1091 // for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
1092 function g_Net_ReceiveResourceFile (resIndex: LongInt; var tf: TNetFileTransfer; strm: TStream): Integer;
1093 var
1094   ev: ENetEvent;
1095   rMsgId: Byte;
1096   Ptr: Pointer;
1097   msg: TMsg;
1098   freePacket: Boolean = false;
1099   ct, ett: Int64;
1100   status: cint;
1101   nextChunk: Integer = 0;
1102   chunkTotal: Integer;
1103   chunk: Integer;
1104   csize: Integer;
1105   buf: PChar = nil;
1106   resumed: Boolean;
1107   //stx: Int64;
1108 begin
1109   tf.resumed := false;
1110   e_LogWritefln('file `%s`, size=%d (%d)', [tf.diskName, Integer(strm.size), tf.size], TMsgType.Notify);
1111   // check if we should resume downloading
1112   resumed := (strm.size > tf.chunkSize) and (strm.size < tf.size);
1113   // send request
1114   trans_omsg.Clear();
1115   trans_omsg.Write(Byte(NTF_CLIENT_START));
1116   if resumed then chunk := strm.size div tf.chunkSize else chunk := 0;
1117   trans_omsg.Write(LongInt(chunk));
1118   if not ftransSendClientMsg(trans_omsg) then begin result := -1; exit; end;
1119
1120   strm.Seek(chunk*tf.chunkSize, soFromBeginning);
1121   chunkTotal := (tf.size+tf.chunkSize-1) div tf.chunkSize;
1122   e_LogWritefln('receiving file `%s` (%d chunks)', [tf.diskName, chunkTotal], TMsgType.Notify);
1123   g_Game_SetLoadingText('downloading "'+ExtractFileName(tf.diskName)+'"', chunkTotal, False);
1124   tf.resumed := resumed;
1125
1126   if (chunk > 0) then g_Game_StepLoading(chunk);
1127   nextChunk := chunk;
1128
1129   // wait for reply data
1130   FillChar(ev, SizeOf(ev), 0);
1131   Result := -1;
1132   GetMem(buf, tf.chunkSize);
1133   try
1134     ett := getNewTimeoutEnd();
1135     repeat
1136       //stx := -GetTimerMS();
1137       status := enet_host_service(NetHost, @ev, 300);
1138       {
1139       if (status < 0) then
1140       begin
1141         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
1142         Result := -1;
1143         exit;
1144       end;
1145       }
1146       if (status <= 0) then
1147       begin
1148         // check for timeout
1149         ct := GetTimerMS();
1150         if (ct >= ett) then
1151         begin
1152           g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
1153           Result := -1;
1154           exit;
1155         end;
1156       end
1157       else
1158       begin
1159         // some event
1160         case ev.kind of
1161           ENET_EVENT_TYPE_RECEIVE:
1162             begin
1163               freePacket := true;
1164               if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
1165               begin
1166                 //e_LogWritefln('g_Net_Wait_Event: skip message from non-transfer channel', []);
1167                 freePacket := false;
1168                 g_Net_Client_HandlePacket(ev.packet, g_Net_ClientLightMsgHandler);
1169                 if (g_Res_received_map_start < 0) then begin result := -666; exit; end;
1170               end
1171               else
1172               begin
1173                 //stx := stx+GetTimerMS();
1174                 //e_LogWritefln('g_Net_ReceiveResourceFile: stx=%d', [Integer(stx)]);
1175                 //stx := -GetTimerMS();
1176                 ett := getNewTimeoutEnd();
1177                 if (ev.packet.dataLength < 1) then
1178                 begin
1179                   e_LogWritefln('g_Net_ReceiveResourceFile: invalid server packet (no data)', []);
1180                   Result := -1;
1181                   exit;
1182                 end;
1183                 Ptr := ev.packet^.data;
1184                 rMsgId := Byte(Ptr^);
1185                 if (rMsgId = NTF_SERVER_DONE) then
1186                 begin
1187                   e_LogWritefln('file transfer complete.', []);
1188                   result := 0;
1189                   exit;
1190                 end
1191                 else if (rMsgId = NTF_SERVER_CHUNK) then
1192                 begin
1193                   if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
1194                   chunk := msg.ReadLongInt();
1195                   csize := msg.ReadLongInt();
1196                   if (chunk <> nextChunk) then
1197                   begin
1198                     e_LogWritefln('received chunk %d, but expected chunk %d', [chunk, nextChunk]);
1199                     Result := -1;
1200                     exit;
1201                   end;
1202                   if (csize < 0) or (csize > tf.chunkSize) then
1203                   begin
1204                     e_LogWritefln('received chunk with size %d, but expected chunk size is %d', [csize, tf.chunkSize]);
1205                     Result := -1;
1206                     exit;
1207                   end;
1208                   //e_LogWritefln('got chunk #%d of #%d (csize=%d)', [chunk, (tf.size+tf.chunkSize-1) div tf.chunkSize, csize]);
1209                   msg.ReadData(buf, csize);
1210                   strm.WriteBuffer(buf^, csize);
1211                   nextChunk := chunk+1;
1212                   g_Game_StepLoading();
1213                   // send ack
1214                   trans_omsg.Clear();
1215                   trans_omsg.Write(Byte(NTF_CLIENT_ACK));
1216                   trans_omsg.Write(LongInt(chunk));
1217                   if not ftransSendClientMsg(trans_omsg) then begin result := -1; exit; end;
1218                 end
1219                 else if (rMsgId = NTF_SERVER_ABORT) then
1220                 begin
1221                   e_LogWritefln('g_Net_ReceiveResourceFile: server aborted transfer', []);
1222                   Result := 2;
1223                   exit;
1224                 end
1225                 else
1226                 begin
1227                   e_LogWritefln('g_Net_ReceiveResourceFile: invalid server packet type', []);
1228                   Result := -1;
1229                   exit;
1230                 end;
1231                 //stx := stx+GetTimerMS();
1232                 //e_LogWritefln('g_Net_ReceiveResourceFile: process stx=%d', [Integer(stx)]);
1233               end;
1234             end;
1235           ENET_EVENT_TYPE_DISCONNECT:
1236             begin
1237               if (ev.data <= NET_DISC_MAX) then
1238                 g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
1239               Result := -1;
1240               exit;
1241             end;
1242           else
1243             begin
1244               g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
1245               result := -1;
1246               exit;
1247             end;
1248         end;
1249         if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
1250       end;
1251       ProcessLoading();
1252       if g_Net_UserRequestExit() then
1253       begin
1254         g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
1255         Result := 1;
1256         exit;
1257       end;
1258     until false;
1259   finally
1260     FreeMem(buf);
1261     if (freePacket) then enet_packet_destroy(ev.packet);
1262   end;
1263 end;
1264
1265
1266 //**************************************************************************
1267 //
1268 // common functions
1269 //
1270 //**************************************************************************
1271
1272 function g_Net_FindSlot(): Integer;
1273 var
1274   I: Integer;
1275   F: Boolean;
1276   N, C: Integer;
1277 begin
1278   N := -1;
1279   F := False;
1280   C := 0;
1281   for I := Low(NetClients) to High(NetClients) do
1282   begin
1283     if NetClients[I].Used then
1284       Inc(C)
1285     else
1286       if not F then
1287       begin
1288         F := True;
1289         N := I;
1290       end;
1291   end;
1292   if C >= NetMaxClients then
1293   begin
1294     Result := -1;
1295     Exit;
1296   end;
1297
1298   if not F then
1299   begin
1300     if (Length(NetClients) >= NetMaxClients) then
1301       N := -1
1302     else
1303     begin
1304       SetLength(NetClients, Length(NetClients) + 1);
1305       N := High(NetClients);
1306     end;
1307   end;
1308
1309   if N >= 0 then
1310   begin
1311     NetClients[N].Used := True;
1312     NetClients[N].ID := N;
1313     NetClients[N].RequestedFullUpdate := False;
1314     NetClients[N].WaitForFirstSpawn := False;
1315     NetClients[N].RCONAuth := False;
1316     NetClients[N].Voted := False;
1317     NetClients[N].Player := 0;
1318     clearNetClientTransfers(NetClients[N]); // just in case
1319   end;
1320
1321   Result := N;
1322 end;
1323
1324
1325 function g_Net_Init(): Boolean;
1326 var
1327   F: TextFile;
1328   IPstr: string;
1329   IP: LongWord;
1330   path: AnsiString;
1331 begin
1332   NetIn.Clear();
1333   NetOut.Clear();
1334   NetBuf[NET_UNRELIABLE].Clear();
1335   NetBuf[NET_RELIABLE].Clear();
1336   //SetLength(NetClients, 0);
1337   clearNetClients(true); // clear array
1338   NetPeer := nil;
1339   NetHost := nil;
1340   NetMyID := -1;
1341   NetPlrUID1 := -1;
1342   NetPlrUID2 := -1;
1343   NetAddr.port := 25666;
1344   SetLength(NetBannedHosts, 0);
1345   path := BANLIST_FILENAME;
1346   if e_FindResource(DataDirs, path) = true then
1347   begin
1348     Assign(F, path);
1349     Reset(F);
1350     while not EOF(F) do
1351     begin
1352       Readln(F, IPstr);
1353       if StrToIp(IPstr, IP) then
1354         g_Net_BanHost(IP);
1355     end;
1356     CloseFile(F);
1357     g_Net_SaveBanList();
1358   end;
1359
1360   //Result := (enet_initialize() = 0);
1361   Result := enet_init_success;
1362 end;
1363
1364 procedure g_Net_Flush();
1365 var
1366   T: Integer;
1367   P: pENetPacket;
1368   F, Chan: enet_uint32;
1369   I: Integer;
1370 begin
1371   F := 0;
1372   Chan := NET_CHAN_GAME;
1373
1374   if NetMode = NET_SERVER then
1375     for T := NET_UNRELIABLE to NET_RELIABLE do
1376     begin
1377       if NetBuf[T].CurSize > 0 then
1378       begin
1379         P := enet_packet_create(NetBuf[T].Data, NetBuf[T].CurSize, F);
1380         if not Assigned(P) then continue;
1381         enet_host_broadcast(NetHost, Chan, P);
1382         NetBuf[T].Clear();
1383       end;
1384
1385       for I := Low(NetClients) to High(NetClients) do
1386       begin
1387         if not NetClients[I].Used then continue;
1388         if NetClients[I].NetOut[T].CurSize <= 0 then continue;
1389         P := enet_packet_create(NetClients[I].NetOut[T].Data, NetClients[I].NetOut[T].CurSize, F);
1390         if not Assigned(P) then continue;
1391         enet_peer_send(NetClients[I].Peer, Chan, P);
1392         NetClients[I].NetOut[T].Clear();
1393       end;
1394
1395       // next and last iteration is always RELIABLE
1396       F := LongWord(ENET_PACKET_FLAG_RELIABLE);
1397       Chan := NET_CHAN_IMPORTANT;
1398     end
1399   else if NetMode = NET_CLIENT then
1400     for T := NET_UNRELIABLE to NET_RELIABLE do
1401     begin
1402       if NetBuf[T].CurSize > 0 then
1403       begin
1404         P := enet_packet_create(NetBuf[T].Data, NetBuf[T].CurSize, F);
1405         if not Assigned(P) then continue;
1406         enet_peer_send(NetPeer, Chan, P);
1407         NetBuf[T].Clear();
1408       end;
1409       // next and last iteration is always RELIABLE
1410       F := LongWord(ENET_PACKET_FLAG_RELIABLE);
1411       Chan := NET_CHAN_IMPORTANT;
1412     end;
1413 end;
1414
1415 procedure g_Net_Cleanup();
1416 begin
1417   NetIn.Clear();
1418   NetOut.Clear();
1419   NetBuf[NET_UNRELIABLE].Clear();
1420   NetBuf[NET_RELIABLE].Clear();
1421
1422   //SetLength(NetClients, 0);
1423   clearNetClients(true); // clear array
1424   NetClientCount := 0;
1425
1426   NetPeer := nil;
1427   NetHost := nil;
1428   g_Net_Slist_ServerClosed();
1429   NetMyID := -1;
1430   NetPlrUID1 := -1;
1431   NetPlrUID2 := -1;
1432   NetState := NET_STATE_NONE;
1433
1434   NetPongSock := ENET_SOCKET_NULL;
1435
1436   NetTimeToMaster := 0;
1437   NetTimeToUpdate := 0;
1438   NetTimeToReliable := 0;
1439
1440   NetMode := NET_NONE;
1441
1442   if NetPortThread <> NilThreadId then
1443     WaitForThreadTerminate(NetPortThread, 66666);
1444
1445   NetPortThread := NilThreadId;
1446   g_Net_UnforwardPorts();
1447
1448   if NetDump then
1449     g_Net_DumpEnd();
1450 end;
1451
1452 procedure g_Net_Free();
1453 begin
1454   g_Net_Cleanup();
1455
1456   //enet_deinitialize();
1457   NetInitDone := False;
1458 end;
1459
1460
1461 //**************************************************************************
1462 //
1463 // SERVER FUNCTIONS
1464 //
1465 //**************************************************************************
1466
1467 function ForwardThread(Param: Pointer): PtrInt;
1468 begin
1469   Result := 0;
1470   if not g_Net_ForwardPorts() then Result := -1;
1471 end;
1472
1473 function g_Net_Host(IPAddr: LongWord; Port: enet_uint16; MaxClients: Cardinal = 16): Boolean;
1474 begin
1475   if NetMode <> NET_NONE then
1476   begin
1477     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_INGAME]);
1478     Result := False;
1479     Exit;
1480   end;
1481
1482   Result := True;
1483
1484   g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_MSG_HOST], [Port]));
1485   if not NetInitDone then
1486   begin
1487     if (not g_Net_Init()) then
1488     begin
1489       g_Console_Add(_lc[I_NET_MSG_FERROR] + _lc[I_NET_ERR_ENET]);
1490       Result := False;
1491       Exit;
1492     end
1493     else
1494       NetInitDone := True;
1495   end;
1496
1497   NetAddr.host := IPAddr;
1498   NetAddr.port := Port;
1499
1500   NetHost := enet_host_create(@NetAddr, NET_MAXCLIENTS, NET_CHANS, 0, 0);
1501
1502   if (NetHost = nil) then
1503   begin
1504     g_Console_Add(_lc[I_NET_MSG_ERROR] + Format(_lc[I_NET_ERR_HOST], [Port]));
1505     Result := False;
1506     g_Net_Cleanup;
1507     Exit;
1508   end;
1509
1510   if NetForwardPorts then NetPortThread := BeginThread(ForwardThread);
1511
1512   NetPongSock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
1513   if NetPongSock <> ENET_SOCKET_NULL then
1514   begin
1515     NetPongAddr.host := IPAddr;
1516     NetPongAddr.port := NET_PING_PORT;
1517     if enet_socket_bind(NetPongSock, @NetPongAddr) < 0 then
1518     begin
1519       enet_socket_destroy(NetPongSock);
1520       NetPongSock := ENET_SOCKET_NULL;
1521     end
1522     else
1523       enet_socket_set_option(NetPongSock, ENET_SOCKOPT_NONBLOCK, 1);
1524   end;
1525
1526   NetMode := NET_SERVER;
1527   NetOut.Clear();
1528   NetBuf[NET_UNRELIABLE].Clear();
1529   NetBuf[NET_RELIABLE].Clear();
1530
1531   if NetDump then
1532     g_Net_DumpStart();
1533 end;
1534
1535 procedure g_Net_Host_Die();
1536 var
1537   I: Integer;
1538 begin
1539   if NetMode <> NET_SERVER then Exit;
1540
1541   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_HOST_DISCALL]);
1542   for I := 0 to High(NetClients) do
1543     if NetClients[I].Used then
1544       enet_peer_disconnect(NetClients[I].Peer, NET_DISC_DOWN);
1545
1546   while enet_host_service(NetHost, @NetEvent, 1000) > 0 do
1547     if NetEvent.kind = ENET_EVENT_TYPE_RECEIVE then
1548       enet_packet_destroy(NetEvent.packet);
1549
1550   for I := 0 to High(NetClients) do
1551     if NetClients[I].Used then
1552     begin
1553       FreeMemory(NetClients[I].Peer^.data);
1554       NetClients[I].Peer^.data := nil;
1555       enet_peer_reset(NetClients[I].Peer);
1556       NetClients[I].Peer := nil;
1557       NetClients[I].Used := False;
1558       NetClients[I].NetOut[NET_UNRELIABLE].Free();
1559       NetClients[I].NetOut[NET_RELIABLE].Free();
1560     end;
1561
1562   clearNetClients(false); // don't clear array
1563   g_Net_Slist_ServerClosed();
1564   if NetPongSock <> ENET_SOCKET_NULL then
1565     enet_socket_destroy(NetPongSock);
1566
1567   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_HOST_DIE]);
1568   enet_host_destroy(NetHost);
1569
1570   NetMode := NET_NONE;
1571
1572   g_Net_Cleanup;
1573   e_WriteLog('NET: Server stopped', TMsgType.Notify);
1574 end;
1575
1576
1577 procedure g_Net_Host_Send(ID: Integer; Reliable: Boolean; Chan: Byte = NET_CHAN_GAME);
1578 var
1579   T: Integer;
1580 begin
1581   if (Reliable) then
1582     T := NET_RELIABLE
1583   else
1584     T := NET_UNRELIABLE;
1585
1586   if (ID >= 0) then
1587   begin
1588     if ID > High(NetClients) then Exit;
1589     if NetClients[ID].Peer = nil then Exit;
1590     // write size first
1591     NetClients[ID].NetOut[T].Write(Integer(NetOut.CurSize));
1592     NetClients[ID].NetOut[T].Write(NetOut);
1593   end
1594   else
1595   begin
1596     // write size first
1597     NetBuf[T].Write(Integer(NetOut.CurSize));
1598     NetBuf[T].Write(NetOut);
1599   end;
1600
1601   if NetDump then g_Net_DumpSendBuffer();
1602   NetOut.Clear();
1603 end;
1604
1605 procedure g_Net_Host_CheckPings();
1606 var
1607   ClAddr: ENetAddress;
1608   Buf: ENetBuffer;
1609   Len: Integer;
1610   ClTime: Int64;
1611   Ping: array [0..9] of Byte;
1612   NPl: Byte;
1613 begin
1614   if (NetPongSock = ENET_SOCKET_NULL) or (NetHost = nil) then Exit;
1615
1616   Buf.data := Addr(Ping[0]);
1617   Buf.dataLength := 2+8;
1618
1619   Ping[0] := 0;
1620
1621   Len := enet_socket_receive(NetPongSock, @ClAddr, @Buf, 1);
1622   if Len < 0 then Exit;
1623
1624   if (Ping[0] = Ord('D')) and (Ping[1] = Ord('F')) then
1625   begin
1626     ClTime := Int64(Addr(Ping[2])^);
1627
1628     NetOut.Clear();
1629     NetOut.Write(Byte(Ord('D')));
1630     NetOut.Write(Byte(Ord('F')));
1631     NetOut.Write(NetHost.address.port);
1632     NetOut.Write(ClTime);
1633     TMasterHost.writeInfo(NetOut);
1634     NPl := 0;
1635     if gPlayer1 <> nil then Inc(NPl);
1636     if gPlayer2 <> nil then Inc(NPl);
1637     NetOut.Write(NPl);
1638     NetOut.Write(gNumBots);
1639
1640     Buf.data := NetOut.Data;
1641     Buf.dataLength := NetOut.CurSize;
1642     enet_socket_send(NetPongSock, @ClAddr, @Buf, 1);
1643
1644     NetOut.Clear();
1645   end;
1646 end;
1647
1648
1649 function g_Net_Host_Update(): enet_size_t;
1650 var
1651   IP: string;
1652   Port: Word;
1653   ID: Integer;
1654   TC: pTNetClient;
1655   TP: TPlayer;
1656 begin
1657   IP := '';
1658   Result := 0;
1659
1660   if NetUseMaster then g_Net_Slist_Pulse();
1661   g_Net_Host_CheckPings();
1662
1663   while (enet_host_service(NetHost, @NetEvent, 0) > 0) do
1664   begin
1665     case (NetEvent.kind) of
1666       ENET_EVENT_TYPE_CONNECT:
1667       begin
1668         IP := IpToStr(NetEvent.Peer^.address.host);
1669         Port := NetEvent.Peer^.address.port;
1670         g_Console_Add(_lc[I_NET_MSG] +
1671           Format(_lc[I_NET_MSG_HOST_CONN], [IP, Port]));
1672
1673         if (NetEvent.data <> NET_PROTOCOL_VER) then
1674         begin
1675           g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_HOST_REJECT] +
1676             _lc[I_NET_DISC_PROTOCOL]);
1677           NetEvent.peer^.data := GetMemory(SizeOf(Byte));
1678           Byte(NetEvent.peer^.data^) := 255;
1679           enet_peer_disconnect(NetEvent.peer, NET_DISC_PROTOCOL);
1680           enet_host_flush(NetHost);
1681           Exit;
1682         end;
1683
1684         ID := g_Net_FindSlot();
1685
1686         if ID < 0 then
1687         begin
1688           g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_HOST_REJECT] +
1689             _lc[I_NET_DISC_FULL]);
1690           NetEvent.Peer^.data := GetMemory(SizeOf(Byte));
1691           Byte(NetEvent.peer^.data^) := 255;
1692           enet_peer_disconnect(NetEvent.peer, NET_DISC_FULL);
1693           enet_host_flush(NetHost);
1694           Exit;
1695         end;
1696
1697         NetClients[ID].Peer := NetEvent.peer;
1698         NetClients[ID].Peer^.data := GetMemory(SizeOf(Byte));
1699         Byte(NetClients[ID].Peer^.data^) := ID;
1700         NetClients[ID].State := NET_STATE_AUTH;
1701         NetClients[ID].RCONAuth := False;
1702         NetClients[ID].NetOut[NET_UNRELIABLE].Alloc(NET_BUFSIZE*2);
1703         NetClients[ID].NetOut[NET_RELIABLE].Alloc(NET_BUFSIZE*2);
1704         clearNetClientTransfers(NetClients[ID]); // just in case
1705
1706         enet_peer_timeout(NetEvent.peer, ENET_PEER_TIMEOUT_LIMIT * 2, ENET_PEER_TIMEOUT_MINIMUM * 2, ENET_PEER_TIMEOUT_MAXIMUM * 2);
1707
1708         Inc(NetClientCount);
1709         g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_MSG_HOST_ADD], [ID]));
1710       end;
1711
1712       ENET_EVENT_TYPE_RECEIVE:
1713       begin
1714         //e_LogWritefln('RECEIVE: chan=%u', [NetEvent.channelID]);
1715         if (NetEvent.channelID = NET_CHAN_DOWNLOAD_EX) then
1716         begin
1717           ProcessDownloadExPacket();
1718         end
1719         else
1720         begin
1721           ID := Byte(NetEvent.peer^.data^);
1722           if ID > High(NetClients) then Exit;
1723           TC := @NetClients[ID];
1724
1725           if NetDump then g_Net_DumpRecvBuffer(NetEvent.packet^.data, NetEvent.packet^.dataLength);
1726           g_Net_Host_HandlePacket(TC, NetEvent.packet, g_Net_HostMsgHandler);
1727         end;
1728       end;
1729
1730       ENET_EVENT_TYPE_DISCONNECT:
1731       begin
1732         ID := Byte(NetEvent.peer^.data^);
1733         if ID > High(NetClients) then Exit;
1734         clearNetClient(NetClients[ID]);
1735         TC := @NetClients[ID];
1736         if TC = nil then Exit;
1737
1738         if not (TC^.Used) then Exit;
1739
1740         TP := g_Player_Get(TC^.Player);
1741
1742         if TP <> nil then
1743         begin
1744           TP.Lives := 0;
1745           TP.Kill(K_SIMPLEKILL, 0, HIT_DISCON);
1746           g_Console_Add(Format(_lc[I_PLAYER_LEAVE], [TP.Name]), True);
1747           e_WriteLog('NET: Client ' + TP.Name + ' [' + IntToStr(ID) + '] disconnected.', TMsgType.Notify);
1748           g_Player_Remove(TP.UID);
1749         end;
1750
1751         TC^.Used := False;
1752         TC^.State := NET_STATE_NONE;
1753         TC^.Peer := nil;
1754         TC^.Player := 0;
1755         TC^.RequestedFullUpdate := False;
1756         TC^.WaitForFirstSpawn := False;
1757         TC^.NetOut[NET_UNRELIABLE].Free();
1758         TC^.NetOut[NET_RELIABLE].Free();
1759
1760         FreeMemory(NetEvent.peer^.data);
1761         NetEvent.peer^.data := nil;
1762         g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_MSG_HOST_DISC], [ID]));
1763         Dec(NetClientCount);
1764
1765         if NetUseMaster then g_Net_Slist_ServerPlayerLeaves();
1766       end;
1767     end;
1768   end;
1769 end;
1770
1771
1772 //**************************************************************************
1773 //
1774 // CLIENT FUNCTIONS
1775 //
1776 //**************************************************************************
1777
1778 procedure g_Net_Disconnect(Forced: Boolean = False);
1779 begin
1780   if NetMode <> NET_CLIENT then Exit;
1781   if (NetHost = nil) or (NetPeer = nil) then Exit;
1782
1783   if not Forced then
1784   begin
1785     enet_peer_disconnect(NetPeer, NET_DISC_NONE);
1786
1787     while (enet_host_service(NetHost, @NetEvent, 1500) > 0) do
1788     begin
1789       if (NetEvent.kind = ENET_EVENT_TYPE_DISCONNECT) then
1790       begin
1791         NetPeer := nil;
1792         break;
1793       end;
1794
1795       if (NetEvent.kind = ENET_EVENT_TYPE_RECEIVE) then
1796         enet_packet_destroy(NetEvent.packet);
1797     end;
1798
1799     if NetPeer <> nil then
1800     begin
1801       enet_peer_reset(NetPeer);
1802       NetPeer := nil;
1803     end;
1804   end
1805   else
1806   begin
1807     e_WriteLog('NET: Kicked from server: ' + IntToStr(NetEvent.data), TMsgType.Notify);
1808     if (NetEvent.data <= NET_DISC_MAX) then
1809       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_KICK] +
1810         _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + NetEvent.data)], True);
1811   end;
1812
1813   if NetHost <> nil then
1814   begin
1815     enet_host_destroy(NetHost);
1816     NetHost := nil;
1817   end;
1818   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_CLIENT_DISC]);
1819
1820   g_Net_Cleanup;
1821   e_WriteLog('NET: Disconnected', TMsgType.Notify);
1822 end;
1823
1824 procedure g_Net_Client_Send(Reliable: Boolean; Chan: Byte = NET_CHAN_GAME);
1825 var
1826   T: Integer;
1827 begin
1828   if (Reliable) then
1829     T := NET_RELIABLE
1830   else
1831     T := NET_UNRELIABLE;
1832
1833   // write size first
1834   NetBuf[T].Write(Integer(NetOut.CurSize));
1835   NetBuf[T].Write(NetOut);
1836
1837   if NetDump then g_Net_DumpSendBuffer();
1838   NetOut.Clear();
1839   g_Net_Flush(); // FIXME: for now, send immediately
1840 end;
1841
1842 function g_Net_Client_Update(): enet_size_t;
1843 begin
1844   Result := 0;
1845   while (NetHost <> nil) and (enet_host_service(NetHost, @NetEvent, 0) > 0) do
1846   begin
1847     case NetEvent.kind of
1848       ENET_EVENT_TYPE_RECEIVE:
1849       begin
1850         if (NetEvent.channelID = NET_CHAN_DOWNLOAD_EX) then continue; // ignore all download packets, they're processed by separate code
1851         if NetDump then g_Net_DumpRecvBuffer(NetEvent.packet^.data, NetEvent.packet^.dataLength);
1852         g_Net_Client_HandlePacket(NetEvent.packet, g_Net_ClientMsgHandler);
1853       end;
1854
1855       ENET_EVENT_TYPE_DISCONNECT:
1856       begin
1857         g_Net_Disconnect(True);
1858         Result := 1;
1859         Exit;
1860       end;
1861     end;
1862   end
1863 end;
1864
1865 function g_Net_Client_UpdateWhileLoading(): enet_size_t;
1866 begin
1867   Result := 0;
1868   while (enet_host_service(NetHost, @NetEvent, 0) > 0) do
1869   begin
1870     case NetEvent.kind of
1871       ENET_EVENT_TYPE_RECEIVE:
1872       begin
1873         if (NetEvent.channelID = NET_CHAN_DOWNLOAD_EX) then continue; // ignore all download packets, they're processed by separate code
1874         if NetDump then g_Net_DumpRecvBuffer(NetEvent.packet^.data, NetEvent.packet^.dataLength);
1875         g_Net_Client_HandlePacket(NetEvent.packet, g_Net_ClientLightMsgHandler);
1876       end;
1877
1878       ENET_EVENT_TYPE_DISCONNECT:
1879       begin
1880         g_Net_Disconnect(True);
1881         Result := 1;
1882         Exit;
1883       end;
1884     end;
1885   end;
1886   g_Net_Flush();
1887 end;
1888
1889 function g_Net_Connect(IP: string; Port: enet_uint16): Boolean;
1890 var
1891   OuterLoop: Boolean;
1892   TimeoutTime, T: Int64;
1893 begin
1894   if NetMode <> NET_NONE then
1895   begin
1896     g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_ERR_INGAME], True);
1897     Result := False;
1898     Exit;
1899   end;
1900
1901   Result := True;
1902
1903   g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_MSG_CLIENT_CONN],
1904     [IP, Port]));
1905   if not NetInitDone then
1906   begin
1907     if (not g_Net_Init()) then
1908     begin
1909       g_Console_Add(_lc[I_NET_MSG_FERROR] + _lc[I_NET_ERR_ENET], True);
1910       Result := False;
1911       Exit;
1912     end
1913     else
1914       NetInitDone := True;
1915   end;
1916
1917   NetHost := enet_host_create(nil, 1, NET_CHANS, 0, 0);
1918
1919   if (NetHost = nil) then
1920   begin
1921     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
1922     g_Net_Cleanup;
1923     Result := False;
1924     Exit;
1925   end;
1926
1927   enet_address_set_host(@NetAddr, PChar(Addr(IP[1])));
1928   NetAddr.port := Port;
1929
1930   NetPeer := enet_host_connect(NetHost, @NetAddr, NET_CHANS, NET_PROTOCOL_VER);
1931
1932   if (NetPeer = nil) then
1933   begin
1934     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
1935     enet_host_destroy(NetHost);
1936     g_Net_Cleanup;
1937     Result := False;
1938     Exit;
1939   end;
1940
1941   // предупредить что ждем слишком долго через N секунд
1942   TimeoutTime := sys_GetTicks() + NET_CONNECT_TIMEOUT;
1943
1944   OuterLoop := True;
1945   while OuterLoop do
1946   begin
1947     while (enet_host_service(NetHost, @NetEvent, 0) > 0) do
1948     begin
1949       if (NetEvent.kind = ENET_EVENT_TYPE_CONNECT) then
1950       begin
1951         g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_MSG_CLIENT_DONE]);
1952         NetMode := NET_CLIENT;
1953         NetOut.Clear();
1954         enet_peer_timeout(NetPeer, ENET_PEER_TIMEOUT_LIMIT * 2, ENET_PEER_TIMEOUT_MINIMUM * 2, ENET_PEER_TIMEOUT_MAXIMUM * 2);
1955         NetClientIP := IP;
1956         NetClientPort := Port;
1957         if NetDump then
1958           g_Net_DumpStart();
1959         Exit;
1960       end;
1961     end;
1962
1963     T := sys_GetTicks();
1964     if T > TimeoutTime then
1965     begin
1966       TimeoutTime := T + NET_CONNECT_TIMEOUT * 100; // одного предупреждения хватит
1967       g_Console_Add(_lc[I_NET_MSG_TIMEOUT_WARN], True);
1968       g_Console_Add(Format(_lc[I_NET_MSG_PORTS], [Integer(Port), Integer(NET_PING_PORT)]), True);
1969     end;
1970
1971     ProcessLoading(true);
1972
1973     if e_KeyPressed(IK_SPACE) or e_KeyPressed(IK_ESCAPE) or e_KeyPressed(VK_ESCAPE) or
1974        e_KeyPressed(JOY0_JUMP) or e_KeyPressed(JOY1_JUMP) or e_KeyPressed(JOY2_JUMP) or e_KeyPressed(JOY3_JUMP) then
1975       OuterLoop := False;
1976   end;
1977
1978   g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_TIMEOUT], True);
1979   g_Console_Add(Format(_lc[I_NET_MSG_PORTS], [Integer(Port), Integer(NET_PING_PORT)]), True);
1980   if NetPeer <> nil then enet_peer_reset(NetPeer);
1981   if NetHost <> nil then
1982   begin
1983     enet_host_destroy(NetHost);
1984     NetHost := nil;
1985   end;
1986   g_Net_Cleanup();
1987   Result := False;
1988 end;
1989
1990 function IpToStr(IP: LongWord): string;
1991 var
1992   Ptr: Pointer;
1993 begin
1994   Ptr := Addr(IP);
1995   Result :=          IntToStr(PByte(Ptr + 0)^) + '.';
1996   Result := Result + IntToStr(PByte(Ptr + 1)^) + '.';
1997   Result := Result + IntToStr(PByte(Ptr + 2)^) + '.';
1998   Result := Result + IntToStr(PByte(Ptr + 3)^);
1999 end;
2000
2001 function StrToIp(IPstr: string; var IP: LongWord): Boolean;
2002 var
2003   EAddr: ENetAddress;
2004 begin
2005   Result := enet_address_set_host(@EAddr, PChar(@IPstr[1])) = 0;
2006   IP := EAddr.host;
2007 end;
2008
2009 function g_Net_Client_ByName(Name: string): pTNetClient;
2010 var
2011   a: Integer;
2012   pl: TPlayer;
2013 begin
2014   Result := nil;
2015   for a := Low(NetClients) to High(NetClients) do
2016     if (NetClients[a].Used) and (NetClients[a].State = NET_STATE_GAME) then
2017     begin
2018       pl := g_Player_Get(NetClients[a].Player);
2019       if pl = nil then continue;
2020       if Copy(LowerCase(pl.Name), 1, Length(Name)) <> LowerCase(Name) then continue;
2021       if NetClients[a].Peer <> nil then
2022       begin
2023         Result := @NetClients[a];
2024         Exit;
2025       end;
2026     end;
2027 end;
2028
2029 function g_Net_Client_ByPlayer(PID: Word): pTNetClient;
2030 var
2031   a: Integer;
2032 begin
2033   Result := nil;
2034   for a := Low(NetClients) to High(NetClients) do
2035     if (NetClients[a].Used) and (NetClients[a].State = NET_STATE_GAME) then
2036       if NetClients[a].Player = PID then
2037       begin
2038         Result := @NetClients[a];
2039         Exit;
2040       end;
2041 end;
2042
2043 function g_Net_ClientName_ByID(ID: Integer): string;
2044 var
2045   a: Integer;
2046   pl: TPlayer;
2047 begin
2048   Result := '';
2049   if ID = NET_EVERYONE then
2050     Exit;
2051   for a := Low(NetClients) to High(NetClients) do
2052     if (NetClients[a].ID = ID) and (NetClients[a].Used) and (NetClients[a].State = NET_STATE_GAME) then
2053     begin
2054       pl := g_Player_Get(NetClients[a].Player);
2055       if pl = nil then Exit;
2056       Result := pl.Name;
2057     end;
2058 end;
2059
2060 procedure g_Net_SendData(Data: AByte; peer: pENetPeer; Reliable: Boolean; Chan: Byte = NET_CHAN_DOWNLOAD);
2061 var
2062   P: pENetPacket;
2063   F: enet_uint32;
2064   dataLength: Cardinal;
2065 begin
2066   dataLength := Length(Data);
2067
2068   if (Reliable) then
2069     F := LongWord(ENET_PACKET_FLAG_RELIABLE)
2070   else
2071     F := 0;
2072
2073   if (peer <> nil) then
2074   begin
2075     P := enet_packet_create(@Data[0], dataLength, F);
2076     if not Assigned(P) then Exit;
2077     enet_peer_send(peer, Chan, P);
2078   end
2079   else
2080   begin
2081     P := enet_packet_create(@Data[0], dataLength, F);
2082     if not Assigned(P) then Exit;
2083     enet_host_broadcast(NetHost, Chan, P);
2084   end;
2085
2086   enet_host_flush(NetHost);
2087 end;
2088
2089 function g_Net_IsHostBanned(IP: LongWord; Perm: Boolean = False): Boolean;
2090 var
2091   I: Integer;
2092 begin
2093   Result := False;
2094   if NetBannedHosts = nil then
2095     Exit;
2096   for I := 0 to High(NetBannedHosts) do
2097     if (NetBannedHosts[I].IP = IP) and ((not Perm) or (NetBannedHosts[I].Perm)) then
2098     begin
2099       Result := True;
2100       break;
2101     end;
2102 end;
2103
2104 procedure g_Net_BanHost(IP: LongWord; Perm: Boolean = True); overload;
2105 var
2106   I, P: Integer;
2107 begin
2108   if IP = 0 then
2109     Exit;
2110   if g_Net_IsHostBanned(IP, Perm) then
2111     Exit;
2112
2113   P := -1;
2114   for I := Low(NetBannedHosts) to High(NetBannedHosts) do
2115     if NetBannedHosts[I].IP = 0 then
2116     begin
2117       P := I;
2118       break;
2119     end;
2120
2121   if P < 0 then
2122   begin
2123     SetLength(NetBannedHosts, Length(NetBannedHosts) + 1);
2124     P := High(NetBannedHosts);
2125   end;
2126
2127   NetBannedHosts[P].IP := IP;
2128   NetBannedHosts[P].Perm := Perm;
2129 end;
2130
2131 procedure g_Net_BanHost(IP: string; Perm: Boolean = True); overload;
2132 var
2133   a: LongWord;
2134   b: Boolean;
2135 begin
2136   b := StrToIp(IP, a);
2137   if b then
2138     g_Net_BanHost(a, Perm);
2139 end;
2140
2141 procedure g_Net_UnbanNonPermHosts();
2142 var
2143   I: Integer;
2144 begin
2145   if NetBannedHosts = nil then
2146     Exit;
2147   for I := Low(NetBannedHosts) to High(NetBannedHosts) do
2148     if (NetBannedHosts[I].IP > 0) and not NetBannedHosts[I].Perm then
2149     begin
2150       NetBannedHosts[I].IP := 0;
2151       NetBannedHosts[I].Perm := True;
2152     end;
2153 end;
2154
2155 function g_Net_UnbanHost(IP: string): Boolean; overload;
2156 var
2157   a: LongWord;
2158 begin
2159   Result := StrToIp(IP, a);
2160   if Result then
2161     Result := g_Net_UnbanHost(a);
2162 end;
2163
2164 function g_Net_UnbanHost(IP: LongWord): Boolean; overload;
2165 var
2166   I: Integer;
2167 begin
2168   Result := False;
2169   if IP = 0 then
2170     Exit;
2171   if NetBannedHosts = nil then
2172     Exit;
2173   for I := 0 to High(NetBannedHosts) do
2174     if NetBannedHosts[I].IP = IP then
2175     begin
2176       NetBannedHosts[I].IP := 0;
2177       NetBannedHosts[I].Perm := True;
2178       Result := True;
2179       // no break here to clear all bans of this host, perm and non-perm
2180     end;
2181 end;
2182
2183 procedure g_Net_SaveBanList();
2184 var
2185   F: TextFile;
2186   I: Integer;
2187   path: AnsiString;
2188 begin
2189   path := e_GetWriteableDir(DataDirs);
2190   if path <> '' then
2191   begin
2192     path := e_CatPath(path, BANLIST_FILENAME);
2193     Assign(F, path);
2194     Rewrite(F);
2195     if NetBannedHosts <> nil then
2196       for I := 0 to High(NetBannedHosts) do
2197         if NetBannedHosts[I].Perm and (NetBannedHosts[I].IP > 0) then
2198           Writeln(F, IpToStr(NetBannedHosts[I].IP));
2199     CloseFile(F)
2200   end
2201 end;
2202
2203 procedure g_Net_DumpStart();
2204 begin
2205   if NetMode = NET_SERVER then
2206     NetDumpFile := e_CreateResource(LogDirs, NETDUMP_FILENAME + '_server')
2207   else
2208     NetDumpFile := e_CreateResource(LogDirs, NETDUMP_FILENAME + '_client');
2209 end;
2210
2211 procedure g_Net_DumpSendBuffer();
2212 begin
2213   writeInt(NetDumpFile, gTime);
2214   writeInt(NetDumpFile, LongWord(NetOut.CurSize));
2215   writeInt(NetDumpFile, Byte(1));
2216   NetDumpFile.WriteBuffer(NetOut.Data^, NetOut.CurSize);
2217 end;
2218
2219 procedure g_Net_DumpRecvBuffer(Buf: penet_uint8; Len: LongWord);
2220 begin
2221   if (Buf = nil) or (Len = 0) then Exit;
2222   writeInt(NetDumpFile, gTime);
2223   writeInt(NetDumpFile, Len);
2224   writeInt(NetDumpFile, Byte(0));
2225   NetDumpFile.WriteBuffer(Buf^, Len);
2226 end;
2227
2228 procedure g_Net_DumpEnd();
2229 begin
2230   NetDumpFile.Free();
2231   NetDumpFile := nil;
2232 end;
2233
2234 function g_Net_ForwardPorts(ForwardPongPort: Boolean = True): Boolean;
2235 {$IFDEF USE_MINIUPNPC}
2236 var
2237   DevList: PUPNPDev;
2238   Urls: TUPNPUrls;
2239   Data: TIGDDatas;
2240   LanAddr: array [0..255] of Char;
2241   StrPort: AnsiString;
2242   Err, I: Integer;
2243 begin
2244   Result := False;
2245
2246   if NetHost = nil then
2247     exit;
2248
2249   if NetPortForwarded = NetHost.address.port then
2250   begin
2251     Result := True;
2252     exit;
2253   end;
2254
2255   NetPongForwarded := False;
2256   NetPortForwarded := 0;
2257
2258   DevList := upnpDiscover(1000, nil, nil, 0, 0, 2, Addr(Err));
2259   if DevList = nil then
2260   begin
2261     conwritefln('port forwarding failed: upnpDiscover() failed: %d', [Err]);
2262     exit;
2263   end;
2264
2265   I := UPNP_GetValidIGD(DevList, @Urls, @Data, Addr(LanAddr[0]), 256);
2266
2267   if I = 0 then
2268   begin
2269     conwriteln('port forwarding failed: could not find an IGD device on this LAN');
2270     FreeUPNPDevList(DevList);
2271     FreeUPNPUrls(@Urls);
2272     exit;
2273   end;
2274
2275   StrPort := IntToStr(NetHost.address.port);
2276   I := UPNP_AddPortMapping(
2277     Urls.controlURL, Addr(data.first.servicetype[1]),
2278     PChar(StrPort), PChar(StrPort), Addr(LanAddr[0]), PChar('D2DF'),
2279     PChar('UDP'), nil, PChar('0')
2280   );
2281
2282   if I <> 0 then
2283   begin
2284     conwritefln('forwarding port %d failed: error %d', [NetHost.address.port, I]);
2285     FreeUPNPDevList(DevList);
2286     FreeUPNPUrls(@Urls);
2287     exit;
2288   end;
2289
2290   if ForwardPongPort then
2291   begin
2292     StrPort := IntToStr(NET_PING_PORT);
2293     I := UPNP_AddPortMapping(
2294       Urls.controlURL, Addr(data.first.servicetype[1]),
2295       PChar(StrPort), PChar(StrPort), Addr(LanAddr[0]), PChar('D2DF'),
2296       PChar('UDP'), nil, PChar('0')
2297     );
2298
2299     if I <> 0 then
2300     begin
2301       conwritefln('forwarding port %d failed: error %d', [NET_PING_PORT, I]);
2302       NetPongForwarded := False;
2303     end
2304     else
2305     begin
2306       conwritefln('forwarded port %d successfully', [NET_PING_PORT]);
2307       NetPongForwarded := True;
2308     end;
2309   end;
2310
2311   conwritefln('forwarded port %d successfully', [NetHost.address.port]);
2312   NetIGDControl := AnsiString(Urls.controlURL);
2313   NetIGDService := data.first.servicetype;
2314   NetPortForwarded := NetHost.address.port;
2315
2316   FreeUPNPDevList(DevList);
2317   FreeUPNPUrls(@Urls);
2318   Result := True;
2319 end;
2320 {$ELSE}
2321 begin
2322   Result := False;
2323 end;
2324 {$ENDIF}
2325
2326 procedure g_Net_UnforwardPorts();
2327 {$IFDEF USE_MINIUPNPC}
2328 var
2329   I: Integer;
2330   StrPort: AnsiString;
2331 begin
2332   if NetPortForwarded = 0 then Exit;
2333
2334   conwriteln('unforwarding ports...');
2335
2336   StrPort := IntToStr(NetPortForwarded);
2337   I := UPNP_DeletePortMapping(
2338     PChar(NetIGDControl), Addr(NetIGDService[1]),
2339     PChar(StrPort), PChar('UDP'), nil
2340   );
2341   conwritefln('  port %d: %d', [NetPortForwarded, I]);
2342
2343   if NetPongForwarded then
2344   begin
2345     NetPongForwarded := False;
2346     StrPort := IntToStr(NET_PING_PORT);
2347     I := UPNP_DeletePortMapping(
2348       PChar(NetIGDControl), Addr(NetIGDService[1]),
2349       PChar(StrPort), PChar('UDP'), nil
2350     );
2351     conwritefln('  port %d: %d', [NET_PING_PORT, I]);
2352   end;
2353
2354   NetPortForwarded := 0;
2355 end;
2356 {$ELSE}
2357 begin
2358 end;
2359 {$ENDIF}
2360
2361 procedure NetServerCVars(P: SSArray);
2362 var
2363   cmd, s: string;
2364   a, b: Integer;
2365 begin
2366   cmd := LowerCase(P[0]);
2367   case cmd of
2368     'sv_name':
2369       begin
2370         if (Length(P) > 1) and (Length(P[1]) > 0) then
2371         begin
2372           NetServerName := P[1];
2373           if Length(NetServerName) > 64 then
2374             SetLength(NetServerName, 64);
2375           g_Net_Slist_ServerRenamed();
2376         end;
2377         g_Console_Add(cmd + ' "' + NetServerName + '"');
2378       end;
2379     'sv_passwd':
2380       begin
2381         if (Length(P) > 1) and (Length(P[1]) > 0) then
2382         begin
2383           NetPassword := P[1];
2384           if Length(NetPassword) > 24 then
2385             SetLength(NetPassword, 24);
2386           g_Net_Slist_ServerRenamed();
2387         end;
2388         g_Console_Add(cmd + ' "' + AnsiLowerCase(NetPassword) + '"');
2389       end;
2390     'sv_maxplrs':
2391       begin
2392         if (Length(P) > 1) then
2393         begin
2394           NetMaxClients := nclamp(StrToIntDef(P[1], NetMaxClients), 1, NET_MAXCLIENTS);
2395           if g_Game_IsServer and g_Game_IsNet then
2396           begin
2397             b := 0;
2398             for a := 0 to High(NetClients) do
2399             begin
2400               if NetClients[a].Used then
2401               begin
2402                 Inc(b);
2403                 if b > NetMaxClients then
2404                 begin
2405                   s := g_Player_Get(NetClients[a].Player).Name;
2406                   enet_peer_disconnect(NetClients[a].Peer, NET_DISC_FULL);
2407                   g_Console_Add(Format(_lc[I_PLAYER_KICK], [s]));
2408                   MH_SEND_GameEvent(NET_EV_PLAYER_KICK, 0, s);
2409                 end;
2410               end;
2411             end;
2412             g_Net_Slist_ServerRenamed();
2413           end;
2414         end;
2415         g_Console_Add(cmd + ' ' + IntToStr(NetMaxClients));
2416       end;
2417     'sv_public':
2418       begin
2419         if (Length(P) > 1) then
2420         begin
2421           NetUseMaster := StrToIntDef(P[1], Byte(NetUseMaster)) <> 0;
2422           if NetUseMaster then g_Net_Slist_Public() else g_Net_Slist_Private();
2423         end;
2424         g_Console_Add(cmd + ' ' + IntToStr(Byte(NetUseMaster)));
2425       end;
2426     'sv_port':
2427       begin
2428         if (Length(P) > 1) then
2429         begin
2430           if not g_Game_IsNet then
2431             NetPort := nclamp(StrToIntDef(P[1], NetPort), 0, $FFFF)
2432           else
2433             g_Console_Add(_lc[I_MSG_NOT_NETGAME]);
2434         end;
2435         g_Console_Add(cmd + ' ' + IntToStr(Ord(NetUseMaster)));
2436       end;
2437   end;
2438 end;
2439
2440 initialization
2441   conRegVar('cl_downloadtimeout', @g_Net_DownloadTimeout, 0.0, 1000000.0, '', 'timeout in seconds, 0 to disable it');
2442   conRegVar('cl_predictself', @NetPredictSelf, '', 'predict local player');
2443   conRegVar('cl_forceplayerupdate', @NetForcePlayerUpdate, '', 'update net players on NET_MSG_PLRPOS');
2444   conRegVar('cl_interp', @NetInterpLevel, '', 'net player interpolation steps');
2445   conRegVar('cl_last_ip', @NetClientIP, '', 'address of the last you have connected to');
2446   conRegVar('cl_last_port', @NetClientPort, '', 'port of the last server you have connected to');
2447   conRegVar('cl_deafen', @NetDeafLevel, '', 'filter server messages (0-3)');
2448
2449   conRegVar('sv_forwardports', @NetForwardPorts, '', 'forward server port using miniupnpc (requires server restart)');
2450   conRegVar('sv_rcon', @NetAllowRCON, '', 'enable remote console');
2451   conRegVar('sv_rcon_password', @NetRCONPassword, '', 'remote console password');
2452   conRegVar('sv_update_interval', @NetUpdateRate, '', 'unreliable update interval');
2453   conRegVar('sv_reliable_interval', @NetRelupdRate, '', 'reliable update interval');
2454   conRegVar('sv_master_interval', @NetMasterRate, '', 'master server update interval');
2455
2456   conRegVar('net_master_list', @NetMasterList, '', 'list of master servers');
2457
2458   SetLength(NetClients, 0);
2459   g_Net_DownloadTimeout := 60;
2460   NetIn.Alloc(NET_BUFSIZE);
2461   NetOut.Alloc(NET_BUFSIZE);
2462   NetBuf[NET_UNRELIABLE].Alloc(NET_BUFSIZE*2);
2463   NetBuf[NET_RELIABLE].Alloc(NET_BUFSIZE*2);
2464   trans_omsg.Alloc(NET_BUFSIZE);
2465 finalization
2466   NetIn.Free();
2467   NetOut.Free();
2468   NetBuf[NET_UNRELIABLE].Free();
2469   NetBuf[NET_RELIABLE].Free();
2470 end.