src/game/g_netmaster.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, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *)
  16 {$INCLUDE ../shared/a_modes.inc}
  17 unit g_netmaster;
  18
  19 interface
  20
  21 uses ENet;
  22
  23 const
  24   NET_MCHANS = 2;
  25
  26   NET_MCHAN_MAIN = 0;
  27   NET_MCHAN_UPD  = 1;
  28
  29   NET_MMSG_UPD = 200;
  30   NET_MMSG_DEL = 201;
  31   NET_MMSG_GET = 202;
  32
  33 type
  34   TNetServer = record
  35     Number: Byte;
  36     Protocol: Byte;
  37     Name: string;
  38     IP: string;
  39     Port: Word;
  40     Map: string;
  41     Players, MaxPlayers, LocalPl, Bots: Byte;
  42     Ping: Int64;
  43     GameMode: Byte;
  44     Password: Boolean;
  45     PingAddr: ENetAddress;
  46   end;
  47   pTNetServer = ^TNetServer;
  48   TNetServerRow = record
  49     Indices: Array of Integer;
  50     Current: Integer;
  51   end;
  52
  53   TNetServerList = array of TNetServer;
  54   pTNetServerList = ^TNetServerList;
  55   TNetServerTable = array of TNetServerRow;
  56
  57 var
  58   NetMHost:       pENetHost = nil;
  59   NetMPeer:       pENetPeer = nil;
  60
  61   slCurrent:       TNetServerList = nil;
  62   slTable:         TNetServerTable = nil;
  63   slWaitStr:       string = '';
  64   slReturnPressed: Boolean = True;
  65
  66 procedure g_Net_Slist_Set(IP: string; Port: Word);
  67 function  g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
  68 procedure g_Net_Slist_Update();
  69 procedure g_Net_Slist_Remove();
  70 function  g_Net_Slist_Connect(): Boolean;
  71 procedure g_Net_Slist_Check();
  72 procedure g_Net_Slist_Disconnect();
  73 procedure g_Net_Slist_WriteInfo();
  74
  75 procedure g_Serverlist_GenerateTable(SL: TNetServerList; var ST: TNetServerTable);
  76 procedure g_Serverlist_Draw(var SL: TNetServerList; var ST: TNetServerTable);
  77 procedure g_Serverlist_Control(var SL: TNetServerList; var ST: TNetServerTable);
  78
  79 implementation
  80
  81 uses
  82   SysUtils, e_msg, e_input, e_graphics, e_log, g_window, g_net, g_console,
  83   g_map, g_game, g_sound, g_gui, g_menu, g_options, g_language, g_basic,
  84   wadreader;
  85
  86 var
  87   NetMEvent:      ENetEvent;
  88   slSelection:    Byte = 0;
  89   slFetched:      Boolean = False;
  90   slDirPressed:   Boolean = False;
  91
  92 function GetTimerMS(): Int64;
  93 begin
  94   Result := GetTimer() {div 1000};
  95 end;
  96
  97 procedure PingServer(var S: TNetServer; Sock: ENetSocket);
  98 var
  99   Buf: ENetBuffer;
 100   Ping: array [0..9] of Byte;
 101   ClTime: Int64;
 102 begin
 103   ClTime := GetTimerMS();
 104
 105   Buf.data := Addr(Ping[0]);
 106   Buf.dataLength := 2+8;
 107
 108   Ping[0] := Ord('D');
 109   Ping[1] := Ord('F');
 110   Int64(Addr(Ping[2])^) := ClTime;
 111
 112   enet_socket_send(Sock, Addr(S.PingAddr), @Buf, 1);
 113 end;
 114
 115 procedure PingBcast(Sock: ENetSocket);
 116 var
 117   S: TNetServer;
 118 begin
 119   S.IP := '255.255.255.255';
 120   S.Port := NET_PING_PORT;
 121   enet_address_set_host(Addr(S.PingAddr), PChar(Addr(S.IP[1])));
 122   S.Ping := -1;
 123   S.PingAddr.port := S.Port;
 124   PingServer(S, Sock);
 125 end;
 126
 127 function g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
 128 var
 129   Cnt: Byte;
 130   P: pENetPacket;
 131   MID: Byte;
 132   I, RX: Integer;
 133   T: Int64;
 134   Sock: ENetSocket;
 135   Buf: ENetBuffer;
 136   InMsg: TMsg;
 137   SvAddr: ENetAddress;
 138   FromSL: Boolean;
 139   UpdVer, MyVer: string;
 140
 141   procedure ProcessLocal();
 142   begin
 143     I := Length(SL);
 144     SetLength(SL, I + 1);
 145     with SL[I] do
 146     begin
 147       IP := DecodeIPV4(SvAddr.host);
 148       Port := InMsg.ReadWord();
 149       Ping := InMsg.ReadInt64();
 150       Ping := GetTimerMS() - Ping;
 151       Name := InMsg.ReadString();
 152       Map := InMsg.ReadString();
 153       GameMode := InMsg.ReadByte();
 154       Players := InMsg.ReadByte();
 155       MaxPlayers := InMsg.ReadByte();
 156       Protocol := InMsg.ReadByte();
 157       Password := InMsg.ReadByte() = 1;
 158       LocalPl := InMsg.ReadByte();
 159       Bots := InMsg.ReadWord();
 160     end;
 161   end;
 162   procedure CheckLocalServers();
 163   begin
 164     SetLength(SL, 0);
 165
 166     Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 167     if Sock = ENET_SOCKET_NULL then Exit;
 168     enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 169     enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 170     PingBcast(Sock);
 171
 172     T := GetTimerMS();
 173
 174     InMsg.Alloc(NET_BUFSIZE);
 175     Buf.data := InMsg.Data;
 176     Buf.dataLength := InMsg.MaxSize;
 177     while GetTimerMS() - T <= 500 do
 178     begin
 179       InMsg.Clear();
 180
 181       RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 182       if RX <= 0 then continue;
 183       InMsg.CurSize := RX;
 184
 185       InMsg.BeginReading();
 186
 187       if InMsg.ReadChar() <> 'D' then continue;
 188       if InMsg.ReadChar() <> 'F' then continue;
 189
 190       ProcessLocal();
 191     end;
 192
 193     InMsg.Free();
 194     enet_socket_destroy(Sock);
 195
 196     if Length(SL) = 0 then SL := nil;
 197   end;
 198 begin
 199   Result := False;
 200   SL := nil;
 201
 202   if (NetMHost <> nil) or (NetMPeer <> nil) then
 203   begin
 204     CheckLocalServers();
 205     Exit;
 206   end;
 207
 208   if not g_Net_Slist_Connect then
 209   begin
 210     CheckLocalServers();
 211     Exit;
 212   end;
 213
 214   e_WriteLog('Fetching serverlist...', TMsgType.Notify);
 215   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_FETCH]);
 216
 217   NetOut.Clear();
 218   NetOut.Write(Byte(NET_MMSG_GET));
 219
 220   // TODO: what should we identify the build with?
 221   MyVer := GAME_VERSION;
 222   NetOut.Write(MyVer);
 223
 224   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 225   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 226   enet_host_flush(NetMHost);
 227
 228   while enet_host_service(NetMHost, @NetMEvent, 5000) > 0 do
 229   begin
 230     if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 231     begin
 232       if not InMsg.Init(NetMEvent.packet^.data, NetMEvent.packet^.dataLength, True) then continue;
 233
 234       MID := InMsg.ReadByte();
 235
 236       if MID <> NET_MMSG_GET then continue;
 237
 238       Cnt := InMsg.ReadByte();
 239       g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_SLIST_RETRIEVED], [Cnt]), True);
 240
 241       if Cnt > 0 then
 242       begin
 243         SetLength(SL, Cnt);
 244
 245         for I := 0 to Cnt - 1 do
 246         begin
 247           SL[I].Number := I;
 248           SL[I].IP := InMsg.ReadString();
 249           SL[I].Port := InMsg.ReadWord();
 250           SL[I].Name := InMsg.ReadString();
 251           SL[I].Map := InMsg.ReadString();
 252           SL[I].GameMode := InMsg.ReadByte();
 253           SL[I].Players := InMsg.ReadByte();
 254           SL[I].MaxPlayers := InMsg.ReadByte();
 255           SL[I].Protocol := InMsg.ReadByte();
 256           SL[I].Password := InMsg.ReadByte() = 1;
 257           enet_address_set_host(Addr(SL[I].PingAddr), PChar(Addr(SL[I].IP[1])));
 258           SL[I].Ping := -1;
 259           SL[I].PingAddr.port := NET_PING_PORT;
 260         end;
 261       end;
 262
 263       if InMsg.ReadCount < InMsg.CurSize then
 264       begin
 265         // new master, supports version reports
 266         UpdVer := InMsg.ReadString();
 267         if (UpdVer <> MyVer) then
 268         begin
 269           { TODO }
 270           g_Console_Add('!!! UpdVer = `' + UpdVer + '`');
 271         end;
 272       end;
 273
 274       Result := True;
 275       break;
 276     end;
 277   end;
 278
 279   g_Net_Slist_Disconnect;
 280   NetOut.Clear();
 281
 282   if Length(SL) = 0 then
 283   begin
 284     CheckLocalServers();
 285     Exit;
 286   end;
 287
 288   Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 289   if Sock = ENET_SOCKET_NULL then Exit;
 290   enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 291
 292   for I := Low(SL) to High(SL) do
 293     PingServer(SL[I], Sock);
 294
 295   enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 296   PingBcast(Sock);
 297
 298   T := GetTimerMS();
 299
 300   InMsg.Alloc(NET_BUFSIZE);
 301   Buf.data := InMsg.Data;
 302   Buf.dataLength := InMsg.MaxSize;
 303   Cnt := 0;
 304   while GetTimerMS() - T <= 500 do
 305   begin
 306     InMsg.Clear();
 307
 308     RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 309     if RX <= 0 then continue;
 310     InMsg.CurSize := RX;
 311
 312     InMsg.BeginReading();
 313
 314     if InMsg.ReadChar() <> 'D' then continue;
 315     if InMsg.ReadChar() <> 'F' then continue;
 316
 317     FromSL := False;
 318     for I := Low(SL) to High(SL) do
 319       if (SL[I].PingAddr.host = SvAddr.host) and
 320          (SL[I].PingAddr.port = SvAddr.port) then
 321       begin
 322         with SL[I] do
 323         begin
 324           Port := InMsg.ReadWord();
 325           Ping := InMsg.ReadInt64();
 326           Ping := GetTimerMS() - Ping;
 327           Name := InMsg.ReadString();
 328           Map := InMsg.ReadString();
 329           GameMode := InMsg.ReadByte();
 330           Players := InMsg.ReadByte();
 331           MaxPlayers := InMsg.ReadByte();
 332           Protocol := InMsg.ReadByte();
 333           Password := InMsg.ReadByte() = 1;
 334           LocalPl := InMsg.ReadByte();
 335           Bots := InMsg.ReadWord();
 336         end;
 337         FromSL := True;
 338         Inc(Cnt);
 339         break;
 340       end;
 341     if not FromSL then
 342       ProcessLocal();
 343   end;
 344
 345   InMsg.Free();
 346   enet_socket_destroy(Sock);
 347 end;
 348
 349 procedure g_Net_Slist_WriteInfo();
 350 var
 351   Wad, Map: string;
 352   Cli: Byte;
 353 begin
 354   Wad := g_ExtractWadNameNoPath(gMapInfo.Map);
 355   Map := g_ExtractFileName(gMapInfo.Map);
 356
 357   NetOut.Write(NetServerName);
 358
 359   NetOut.Write(Wad + ':\' + Map);
 360   NetOut.Write(gGameSettings.GameMode);
 361
 362   Cli := NetClientCount;
 363   NetOut.Write(Cli);
 364
 365   NetOut.Write(NetMaxClients);
 366
 367   NetOut.Write(Byte(NET_PROTOCOL_VER));
 368   NetOut.Write(Byte(NetPassword <> ''));
 369 end;
 370
 371 procedure g_Net_Slist_Update;
 372 var
 373
 374   P: pENetPacket;
 375
 376 begin
 377   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 378
 379   NetOut.Clear();
 380   NetOut.Write(Byte(NET_MMSG_UPD));
 381   NetOut.Write(NetAddr.port);
 382
 383   g_Net_Slist_WriteInfo();
 384
 385   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 386   enet_peer_send(NetMPeer, NET_MCHAN_UPD, P);
 387
 388   enet_host_flush(NetMHost);
 389   NetOut.Clear();
 390 end;
 391
 392 procedure g_Net_Slist_Remove;
 393 var
 394   P: pENetPacket;
 395 begin
 396   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 397   NetOut.Clear();
 398   NetOut.Write(Byte(NET_MMSG_DEL));
 399   NetOut.Write(NetAddr.port);
 400
 401   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 402   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 403
 404   enet_host_flush(NetMHost);
 405   NetOut.Clear();
 406 end;
 407
 408 function g_Net_Slist_Connect: Boolean;
 409 begin
 410   Result := False;
 411
 412   NetMHost := enet_host_create(nil, 1, NET_MCHANS, 0, 0);
 413   if (NetMHost = nil) then
 414   begin
 415     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 416     Exit;
 417   end;
 418
 419   NetMPeer := enet_host_connect(NetMHost, @NetSlistAddr, NET_MCHANS, 0);
 420   if (NetMPeer = nil) then
 421   begin
 422     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 423     enet_host_destroy(NetMHost);
 424     NetMHost := nil;
 425     Exit;
 426   end;
 427
 428   if (enet_host_service(NetMHost, @NetMEvent, 3000) > 0) then
 429     if NetMEvent.kind = ENET_EVENT_TYPE_CONNECT then
 430     begin
 431       Result := True;
 432       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_CONN]);
 433       Exit;
 434     end
 435     else
 436       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 437         enet_packet_destroy(NetMEvent.packet);
 438
 439   g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_SLIST_ERROR], True);
 440
 441   NetMHost := nil;
 442   NetMPeer := nil;
 443 end;
 444
 445 procedure g_Net_Slist_Disconnect;
 446 begin
 447   if (NetMHost = nil) and (NetMPeer = nil) then Exit;
 448
 449   if NetMode = NET_SERVER then g_Net_Slist_Remove;
 450
 451   enet_peer_disconnect(NetMPeer, 0);
 452   enet_host_flush(NetMHost);
 453
 454   enet_peer_reset(NetMPeer);
 455   enet_host_destroy(NetMHost);
 456
 457   NetMPeer := nil;
 458   NetMHost := nil;
 459
 460   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_DISC]);
 461 end;
 462
 463 procedure g_Net_Slist_Check;
 464 begin
 465   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 466
 467   while (enet_host_service(NetMHost, @NetMEvent, 0) > 0) do
 468   begin
 469     if NetMEvent.kind = ENET_EVENT_TYPE_DISCONNECT then
 470     begin
 471       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_LOST], True);
 472       if NetMPeer <> nil then enet_peer_reset(NetMPeer);
 473       if NetMHost <> nil then enet_host_destroy(NetMHost);
 474       NetMPeer := nil;
 475       NetMHost := nil;
 476       Break;
 477     end
 478     else
 479       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 480         enet_packet_destroy(NetMEvent.packet);
 481   end;
 482 end;
 483
 484 procedure g_Net_Slist_Set(IP: string; Port: Word);
 485 begin
 486   if NetInitDone then
 487   begin
 488     enet_address_set_host(@NetSlistAddr, PChar(Addr(IP[1])));
 489     NetSlistAddr.Port := Port;
 490     e_WriteLog('Masterserver address set to ' + IP + ':' + IntToStr(Port), TMsgType.Notify);
 491   end;
 492 end;
 493
 494 function GetServerFromTable(Index: Integer; SL: TNetServerList; ST: TNetServerTable): TNetServer;
 495 begin
 496   Result.Number := 0;
 497   Result.Protocol := 0;
 498   Result.Name := '';
 499   Result.IP := '';
 500   Result.Port := 0;
 501   Result.Map := '';
 502   Result.Players := 0;
 503   Result.MaxPlayers := 0;
 504   Result.LocalPl := 0;
 505   Result.Bots := 0;
 506   Result.Ping := 0;
 507   Result.GameMode := 0;
 508   Result.Password := false;
 509   FillChar(Result.PingAddr, SizeOf(ENetAddress), 0);
 510   if ST = nil then
 511     Exit;
 512   if (Index < 0) or (Index >= Length(ST)) then
 513     Exit;
 514   Result := SL[ST[Index].Indices[ST[Index].Current]];
 515 end;
 516
 517 procedure g_Serverlist_Draw(var SL: TNetServerList; var ST: TNetServerTable);
 518 var
 519   Srv: TNetServer;
 520   sy, i, y, mw, mx, l: Integer;
 521   cw: Byte = 0;
 522   ch: Byte = 0;
 523   ww: Word = 0;
 524   hh: Word = 0;
 525   ip: string;
 526 begin
 527   ip := '';
 528   sy := 0;
 529
 530   e_CharFont_GetSize(gMenuFont, _lc[I_NET_SLIST], ww, hh);
 531   e_CharFont_Print(gMenuFont, (gScreenWidth div 2) - (ww div 2), 16, _lc[I_NET_SLIST]);
 532
 533   e_TextureFontGetSize(gStdFont, cw, ch);
 534
 535   ip := _lc[I_NET_SLIST_HELP];
 536   mw := (Length(ip) * cw) div 2;
 537
 538   e_DrawFillQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 64, 64, 64, 110);
 539   e_DrawQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 255, 127, 0);
 540
 541   e_TextureFontPrintEx(gScreenWidth div 2 - mw, gScreenHeight-24, ip, gStdFont, 225, 225, 225, 1);
 542
 543   if SL = nil then
 544   begin
 545     l := Length(slWaitStr) div 2;
 546     e_DrawFillQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 64, 64, 64, 128);
 547     e_DrawQuad(gScreenWidth div 2 - 192, gScreenHeight div 2 - 10,
 548       gScreenWidth div 2 + 192, gScreenHeight div 2 + 11, 255, 127, 0);
 549     e_TextureFontPrint(gScreenWidth div 2 - cw * l, gScreenHeight div 2 - ch div 2,
 550       slWaitStr, gStdFont);
 551     Exit;
 552   end;
 553
 554   y := 90;
 555   if (slSelection < Length(ST)) then
 556   begin
 557     I := slSelection;
 558     sy := y + 42 * I - 4;
 559     Srv := GetServerFromTable(I, SL, ST);
 560     ip := _lc[I_NET_ADDRESS] + ' ' + Srv.IP + ':' + IntToStr(Srv.Port);
 561     if Srv.Password then
 562       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_YES]
 563     else
 564       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_NO];
 565   end else
 566     if Length(ST) > 0 then
 567       slSelection := 0;
 568
 569   mw := (gScreenWidth - 188);
 570   mx := 16 + mw;
 571
 572   e_DrawFillQuad(16 + 1, sy, gScreenWidth - 16 - 1, sy + 40, 64, 64, 64, 0);
 573   e_DrawLine(1, 16 + 1, sy, gScreenWidth - 16 - 1, sy, 205, 205, 205);
 574   e_DrawLine(1, 16 + 1, sy + 41, gScreenWidth - 16 - 1, sy + 41, 255, 255, 255);
 575
 576   e_DrawLine(1, 16, 85, gScreenWidth - 16, 85, 255, 127, 0);
 577   e_DrawLine(1, 16, gScreenHeight-64, gScreenWidth-16, gScreenHeight-64, 255, 127, 0);
 578
 579   e_DrawLine(1, mx - 70, 64, mx - 70, gScreenHeight-44, 255, 127, 0);
 580   e_DrawLine(1, mx, 64, mx, gScreenHeight-64, 255, 127, 0);
 581   e_DrawLine(1, mx + 52, 64, mx + 52, gScreenHeight-64, 255, 127, 0);
 582   e_DrawLine(1, mx + 104, 64, mx + 104, gScreenHeight-64, 255, 127, 0);
 583
 584   e_TextureFontPrintEx(18, 68, 'NAME/MAP', gStdFont, 255, 127, 0, 1);
 585   e_TextureFontPrintEx(mx - 68, 68, 'PING', gStdFont, 255, 127, 0, 1);
 586   e_TextureFontPrintEx(mx + 2, 68, 'MODE', gStdFont, 255, 127, 0, 1);
 587   e_TextureFontPrintEx(mx + 54, 68, 'PLRS', gStdFont, 255, 127, 0, 1);
 588   e_TextureFontPrintEx(mx + 106, 68, 'VER', gStdFont, 255, 127, 0, 1);
 589
 590   y := 90;
 591   for I := 0 to High(ST) do
 592   begin
 593     Srv := GetServerFromTable(I, SL, ST);
 594     // Name and map
 595     e_TextureFontPrintEx(18, y, Srv.Name, gStdFont, 255, 255, 255, 1);
 596     e_TextureFontPrintEx(18, y + 16, Srv.Map, gStdFont, 210, 210, 210, 1);
 597
 598     // Ping and similar count
 599     if (Srv.Ping < 0) or (Srv.Ping > 999) then
 600       e_TextureFontPrintEx(mx - 68, y, _lc[I_NET_SLIST_NO_ACCESS], gStdFont, 255, 0, 0, 1)
 601     else
 602       if Srv.Ping = 0 then
 603         e_TextureFontPrintEx(mx - 68, y, '<1' + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1)
 604       else
 605         e_TextureFontPrintEx(mx - 68, y, IntToStr(Srv.Ping) + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1);
 606
 607     if Length(ST[I].Indices) > 1 then
 608       e_TextureFontPrintEx(mx - 68, y + 16, '< ' + IntToStr(Length(ST[I].Indices)) + ' >', gStdFont, 210, 210, 210, 1);
 609
 610     // Game mode
 611     e_TextureFontPrintEx(mx + 2, y, g_Game_ModeToText(Srv.GameMode), gStdFont, 255, 255, 255, 1);
 612
 613     // Players
 614     e_TextureFontPrintEx(mx + 54, y, IntToStr(Srv.Players) + '/' + IntToStr(Srv.MaxPlayers), gStdFont, 255, 255, 255, 1);
 615     e_TextureFontPrintEx(mx + 54, y + 16, IntToStr(Srv.LocalPl) + '+' + IntToStr(Srv.Bots), gStdFont, 210, 210, 210, 1);
 616
 617     // Version
 618     e_TextureFontPrintEx(mx + 106, y, IntToStr(Srv.Protocol), gStdFont, 255, 255, 255, 1);
 619
 620     y := y + 42;
 621   end;
 622
 623   e_TextureFontPrintEx(20, gScreenHeight-61, ip, gStdFont, 205, 205, 205, 1);
 624   ip := IntToStr(Length(ST)) + _lc[I_NET_SLIST_SERVERS];
 625   e_TextureFontPrintEx(gScreenWidth - 48 - (Length(ip) + 1)*cw,
 626     gScreenHeight-61, ip, gStdFont, 205, 205, 205, 1);
 627 end;
 628
 629 procedure g_Serverlist_GenerateTable(SL: TNetServerList; var ST: TNetServerTable);
 630 var
 631   i, j: Integer;
 632
 633   function FindServerInTable(Name: string): Integer;
 634   var
 635     i: Integer;
 636   begin
 637     Result := -1;
 638     if ST = nil then
 639       Exit;
 640     for i := Low(ST) to High(ST) do
 641     begin
 642       if Length(ST[i].Indices) = 0 then
 643         continue;
 644       if SL[ST[i].Indices[0]].Name = Name then
 645       begin
 646         Result := i;
 647         Exit;
 648       end;
 649     end;
 650   end;
 651   function ComparePing(i1, i2: Integer): Boolean;
 652   var
 653     p1, p2: Int64;
 654   begin
 655     p1 := SL[i1].Ping;
 656     p2 := SL[i2].Ping;
 657     if (p1 < 0) then p1 := 999;
 658     if (p2 < 0) then p2 := 999;
 659     Result := p1 > p2;
 660   end;
 661   procedure SortIndices(var ind: Array of Integer);
 662   var
 663     I, J: Integer;
 664     T: Integer;
 665   begin
 666     for I := High(ind) downto Low(ind) do
 667       for J := Low(ind) to High(ind) - 1 do
 668         if ComparePing(ind[j], ind[j+1]) then
 669         begin
 670           T := ind[j];
 671           ind[j] := ind[j+1];
 672           ind[j+1] := T;
 673         end;
 674   end;
 675   procedure SortRows();
 676   var
 677     I, J: Integer;
 678     T: TNetServerRow;
 679   begin
 680     for I := High(ST) downto Low(ST) do
 681       for J := Low(ST) to High(ST) - 1 do
 682         if ComparePing(ST[j].Indices[0], ST[j+1].Indices[0]) then
 683         begin
 684           T := ST[j];
 685           ST[j] := ST[j+1];
 686           ST[j+1] := T;
 687         end;
 688   end;
 689 begin
 690   ST := nil;
 691   if SL = nil then
 692     Exit;
 693   for i := Low(SL) to High(SL) do
 694   begin
 695     j := FindServerInTable(SL[i].Name);
 696     if j = -1 then
 697     begin
 698       j := Length(ST);
 699       SetLength(ST, j + 1);
 700       ST[j].Current := 0;
 701       SetLength(ST[j].Indices, 1);
 702       ST[j].Indices[0] := i;
 703     end
 704     else
 705     begin
 706       SetLength(ST[j].Indices, Length(ST[j].Indices) + 1);
 707       ST[j].Indices[High(ST[j].Indices)] := i;
 708     end;
 709   end;
 710
 711   for i := Low(ST) to High(ST) do
 712     SortIndices(ST[i].Indices);
 713
 714   SortRows();
 715 end;
 716
 717 procedure g_Serverlist_Control(var SL: TNetServerList; var ST: TNetServerTable);
 718 var
 719   qm: Boolean;
 720   Srv: TNetServer;
 721 begin
 722   if gConsoleShow or gChatShow then
 723     Exit;
 724
 725   qm := g_ProcessMessages(); // this updates kbd
 726
 727   if qm or e_KeyPressed(IK_ESCAPE) or e_KeyPressed(VK_ESCAPE) or
 728      e_KeyPressed(JOY0_JUMP) or e_KeyPressed(JOY1_JUMP) or
 729      e_KeyPressed(JOY2_JUMP) or e_KeyPressed(JOY3_JUMP) then
 730   begin
 731     SL := nil;
 732     ST := nil;
 733     gState := STATE_MENU;
 734     g_GUI_ShowWindow('MainMenu');
 735     g_GUI_ShowWindow('NetGameMenu');
 736     g_GUI_ShowWindow('NetClientMenu');
 737     g_Sound_PlayEx(WINDOW_CLOSESOUND);
 738     Exit;
 739   end;
 740
 741   if e_KeyPressed(IK_SPACE) or e_KeyPressed(VK_JUMP) or
 742      e_KeyPressed(JOY0_ACTIVATE) or e_KeyPressed(JOY1_ACTIVATE) or e_KeyPressed(JOY2_ACTIVATE) or e_KeyPressed(JOY3_ACTIVATE) then
 743   begin
 744     if not slFetched then
 745     begin
 746       slWaitStr := _lc[I_NET_SLIST_WAIT];
 747
 748       g_Game_Draw;
 749       g_window.ReDrawWindow;
 750
 751       if g_Net_Slist_Fetch(SL) then
 752       begin
 753         if SL = nil then
 754           slWaitStr := _lc[I_NET_SLIST_NOSERVERS];
 755       end
 756       else
 757         if SL = nil then
 758           slWaitStr := _lc[I_NET_SLIST_ERROR];
 759       slFetched := True;
 760       slSelection := 0;
 761       g_Serverlist_GenerateTable(SL, ST);
 762     end;
 763   end
 764   else
 765     slFetched := False;
 766
 767   if SL = nil then Exit;
 768
 769   if e_KeyPressed(IK_RETURN) or e_KeyPressed(IK_KPRETURN) or e_KeyPressed(VK_FIRE) or e_KeyPressed(VK_OPEN) or
 770      e_KeyPressed(JOY0_ATTACK) or e_KeyPressed(JOY1_ATTACK) or e_KeyPressed(JOY2_ATTACK) or e_KeyPressed(JOY3_ATTACK) then
 771   begin
 772     if not slReturnPressed then
 773     begin
 774       Srv := GetServerFromTable(slSelection, SL, ST);
 775       if Srv.Password then
 776       begin
 777         PromptIP := Srv.IP;
 778         PromptPort := Srv.Port;
 779         gState := STATE_MENU;
 780         g_GUI_ShowWindow('ClientPasswordMenu');
 781         SL := nil;
 782         ST := nil;
 783         slReturnPressed := True;
 784         Exit;
 785       end
 786       else
 787         g_Game_StartClient(Srv.IP, Srv.Port, '');
 788       SL := nil;
 789       ST := nil;
 790       slReturnPressed := True;
 791       Exit;
 792     end;
 793   end
 794   else
 795     slReturnPressed := False;
 796
 797   if e_KeyPressed(IK_DOWN) or e_KeyPressed(IK_KPDOWN) or e_KeyPressed(VK_DOWN) or
 798      e_KeyPressed(JOY0_DOWN) or e_KeyPressed(JOY1_DOWN) or e_KeyPressed(JOY2_DOWN) or e_KeyPressed(JOY3_DOWN) then
 799   begin
 800     if not slDirPressed then
 801     begin
 802       Inc(slSelection);
 803       if slSelection > High(ST) then slSelection := 0;
 804       slDirPressed := True;
 805     end;
 806   end;
 807
 808   if e_KeyPressed(IK_UP) or e_KeyPressed(IK_KPUP) or e_KeyPressed(VK_UP) or
 809      e_KeyPressed(JOY0_UP) or e_KeyPressed(JOY1_UP) or e_KeyPressed(JOY2_UP) or e_KeyPressed(JOY3_UP) then
 810   begin
 811     if not slDirPressed then
 812     begin
 813       if slSelection = 0 then slSelection := Length(ST);
 814       Dec(slSelection);
 815
 816       slDirPressed := True;
 817     end;
 818   end;
 819
 820   if e_KeyPressed(IK_RIGHT) or e_KeyPressed(IK_KPRIGHT) or e_KeyPressed(VK_RIGHT) or
 821      e_KeyPressed(JOY0_RIGHT) or e_KeyPressed(JOY1_RIGHT) or e_KeyPressed(JOY2_RIGHT) or e_KeyPressed(JOY3_RIGHT) then
 822   begin
 823     if not slDirPressed then
 824     begin
 825       Inc(ST[slSelection].Current);
 826       if ST[slSelection].Current > High(ST[slSelection].Indices) then ST[slSelection].Current := 0;
 827       slDirPressed := True;
 828     end;
 829   end;
 830
 831   if e_KeyPressed(IK_LEFT) or e_KeyPressed(IK_KPLEFT) or e_KeyPressed(VK_LEFT) or
 832      e_KeyPressed(JOY0_LEFT) or e_KeyPressed(JOY1_LEFT) or e_KeyPressed(JOY2_LEFT) or e_KeyPressed(JOY3_LEFT) then
 833   begin
 834     if not slDirPressed then
 835     begin
 836       if ST[slSelection].Current = 0 then ST[slSelection].Current := Length(ST[slSelection].Indices);
 837       Dec(ST[slSelection].Current);
 838
 839       slDirPressed := True;
 840     end;
 841   end;
 842
 843   if (not e_KeyPressed(IK_DOWN)) and
 844      (not e_KeyPressed(IK_UP)) and
 845      (not e_KeyPressed(IK_RIGHT)) and
 846      (not e_KeyPressed(IK_LEFT)) and
 847      (not e_KeyPressed(IK_KPDOWN)) and
 848      (not e_KeyPressed(IK_KPUP)) and
 849      (not e_KeyPressed(IK_KPRIGHT)) and
 850      (not e_KeyPressed(IK_KPLEFT)) and
 851      (not e_KeyPressed(VK_DOWN)) and
 852      (not e_KeyPressed(VK_UP)) and
 853      (not e_KeyPressed(VK_RIGHT)) and
 854      (not e_KeyPressed(VK_LEFT)) and
 855      (not e_KeyPressed(JOY0_UP)) and (not e_KeyPressed(JOY1_UP)) and (not e_KeyPressed(JOY2_UP)) and (not e_KeyPressed(JOY3_UP)) and
 856      (not e_KeyPressed(JOY0_DOWN)) and (not e_KeyPressed(JOY1_DOWN)) and (not e_KeyPressed(JOY2_DOWN)) and (not e_KeyPressed(JOY3_DOWN)) and
 857      (not e_KeyPressed(JOY0_LEFT)) and (not e_KeyPressed(JOY1_LEFT)) and (not e_KeyPressed(JOY2_LEFT)) and (not e_KeyPressed(JOY3_LEFT)) and
 858      (not e_KeyPressed(JOY0_RIGHT)) and (not e_KeyPressed(JOY1_RIGHT)) and (not e_KeyPressed(JOY2_RIGHT)) and (not e_KeyPressed(JOY3_RIGHT))
 859  then
 860     slDirPressed := False;
 861 end;
 862
 863 end.