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   slMOTD:          string = '';
  67   slUrgent:        string = '';
  68
  69 procedure g_Net_Slist_Set(IP: string; Port: Word);
  70 function  g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
  71 procedure g_Net_Slist_Update();
  72 procedure g_Net_Slist_Remove();
  73 function  g_Net_Slist_Connect(): Boolean;
  74 procedure g_Net_Slist_Check();
  75 procedure g_Net_Slist_Disconnect();
  76 procedure g_Net_Slist_WriteInfo();
  77
  78 procedure g_Serverlist_GenerateTable(SL: TNetServerList; var ST: TNetServerTable);
  79 procedure g_Serverlist_Draw(var SL: TNetServerList; var ST: TNetServerTable);
  80 procedure g_Serverlist_Control(var SL: TNetServerList; var ST: TNetServerTable);
  81
  82 implementation
  83
  84 uses
  85   SysUtils, e_msg, e_input, e_graphics, e_log, g_window, g_net, g_console,
  86   g_map, g_game, g_sound, g_gui, g_menu, g_options, g_language, g_basic,
  87   wadreader;
  88
  89 var
  90   NetMEvent:      ENetEvent;
  91   slSelection:    Byte = 0;
  92   slFetched:      Boolean = False;
  93   slDirPressed:   Boolean = False;
  94   slReadUrgent:   Boolean = False;
  95
  96 function GetTimerMS(): Int64;
  97 begin
  98   Result := GetTimer() {div 1000};
  99 end;
 100
 101 procedure PingServer(var S: TNetServer; Sock: ENetSocket);
 102 var
 103   Buf: ENetBuffer;
 104   Ping: array [0..9] of Byte;
 105   ClTime: Int64;
 106 begin
 107   ClTime := GetTimerMS();
 108
 109   Buf.data := Addr(Ping[0]);
 110   Buf.dataLength := 2+8;
 111
 112   Ping[0] := Ord('D');
 113   Ping[1] := Ord('F');
 114   Int64(Addr(Ping[2])^) := ClTime;
 115
 116   enet_socket_send(Sock, Addr(S.PingAddr), @Buf, 1);
 117 end;
 118
 119 procedure PingBcast(Sock: ENetSocket);
 120 var
 121   S: TNetServer;
 122 begin
 123   S.IP := '255.255.255.255';
 124   S.Port := NET_PING_PORT;
 125   enet_address_set_host(Addr(S.PingAddr), PChar(Addr(S.IP[1])));
 126   S.Ping := -1;
 127   S.PingAddr.port := S.Port;
 128   PingServer(S, Sock);
 129 end;
 130
 131 function g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
 132 var
 133   Cnt: Byte;
 134   P: pENetPacket;
 135   MID: Byte;
 136   I, RX: Integer;
 137   T: Int64;
 138   Sock: ENetSocket;
 139   Buf: ENetBuffer;
 140   InMsg: TMsg;
 141   SvAddr: ENetAddress;
 142   FromSL: Boolean;
 143   MyVer, Str: string;
 144
 145   procedure ProcessLocal();
 146   begin
 147     I := Length(SL);
 148     SetLength(SL, I + 1);
 149     with SL[I] do
 150     begin
 151       IP := DecodeIPV4(SvAddr.host);
 152       Port := InMsg.ReadWord();
 153       Ping := InMsg.ReadInt64();
 154       Ping := GetTimerMS() - Ping;
 155       Name := InMsg.ReadString();
 156       Map := InMsg.ReadString();
 157       GameMode := InMsg.ReadByte();
 158       Players := InMsg.ReadByte();
 159       MaxPlayers := InMsg.ReadByte();
 160       Protocol := InMsg.ReadByte();
 161       Password := InMsg.ReadByte() = 1;
 162       LocalPl := InMsg.ReadByte();
 163       Bots := InMsg.ReadWord();
 164     end;
 165   end;
 166   procedure CheckLocalServers();
 167   begin
 168     SetLength(SL, 0);
 169
 170     Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 171     if Sock = ENET_SOCKET_NULL then Exit;
 172     enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 173     enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 174     PingBcast(Sock);
 175
 176     T := GetTimerMS();
 177
 178     InMsg.Alloc(NET_BUFSIZE);
 179     Buf.data := InMsg.Data;
 180     Buf.dataLength := InMsg.MaxSize;
 181     while GetTimerMS() - T <= 500 do
 182     begin
 183       InMsg.Clear();
 184
 185       RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 186       if RX <= 0 then continue;
 187       InMsg.CurSize := RX;
 188
 189       InMsg.BeginReading();
 190
 191       if InMsg.ReadChar() <> 'D' then continue;
 192       if InMsg.ReadChar() <> 'F' then continue;
 193
 194       ProcessLocal();
 195     end;
 196
 197     InMsg.Free();
 198     enet_socket_destroy(Sock);
 199
 200     if Length(SL) = 0 then SL := nil;
 201   end;
 202 begin
 203   Result := False;
 204   SL := nil;
 205
 206   if (NetMHost <> nil) or (NetMPeer <> nil) then
 207   begin
 208     CheckLocalServers();
 209     Exit;
 210   end;
 211
 212   if not g_Net_Slist_Connect then
 213   begin
 214     CheckLocalServers();
 215     Exit;
 216   end;
 217
 218   e_WriteLog('Fetching serverlist...', TMsgType.Notify);
 219   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_FETCH]);
 220
 221   NetOut.Clear();
 222   NetOut.Write(Byte(NET_MMSG_GET));
 223
 224   // TODO: what should we identify the build with?
 225   MyVer := GAME_VERSION;
 226   NetOut.Write(MyVer);
 227
 228   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 229   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 230   enet_host_flush(NetMHost);
 231
 232   while enet_host_service(NetMHost, @NetMEvent, 5000) > 0 do
 233   begin
 234     if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 235     begin
 236       if not InMsg.Init(NetMEvent.packet^.data, NetMEvent.packet^.dataLength, True) then continue;
 237
 238       MID := InMsg.ReadByte();
 239
 240       if MID <> NET_MMSG_GET then continue;
 241
 242       Cnt := InMsg.ReadByte();
 243       g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_SLIST_RETRIEVED], [Cnt]), True);
 244
 245       if Cnt > 0 then
 246       begin
 247         SetLength(SL, Cnt);
 248
 249         for I := 0 to Cnt - 1 do
 250         begin
 251           SL[I].Number := I;
 252           SL[I].IP := InMsg.ReadString();
 253           SL[I].Port := InMsg.ReadWord();
 254           SL[I].Name := InMsg.ReadString();
 255           SL[I].Map := InMsg.ReadString();
 256           SL[I].GameMode := InMsg.ReadByte();
 257           SL[I].Players := InMsg.ReadByte();
 258           SL[I].MaxPlayers := InMsg.ReadByte();
 259           SL[I].Protocol := InMsg.ReadByte();
 260           SL[I].Password := InMsg.ReadByte() = 1;
 261           enet_address_set_host(Addr(SL[I].PingAddr), PChar(Addr(SL[I].IP[1])));
 262           SL[I].Ping := -1;
 263           SL[I].PingAddr.port := NET_PING_PORT;
 264         end;
 265       end;
 266
 267       if InMsg.ReadCount < InMsg.CurSize then
 268       begin
 269         // new master, supports version reports
 270         Str := InMsg.ReadString();
 271         if (Str <> MyVer) then
 272         begin
 273           { TODO }
 274           g_Console_Add('!!! UpdVer = `' + Str + '`');
 275         end;
 276         // even newer master, supports extra info
 277         if InMsg.ReadCount < InMsg.CurSize then
 278         begin
 279           slMOTD := b_Text_Format(InMsg.ReadString());
 280           Str := b_Text_Format(InMsg.ReadString());
 281           // check if the message has updated and the user has to read it again
 282           if slUrgent <> Str then slReadUrgent := False;
 283           slUrgent := Str;
 284         end;
 285       end;
 286
 287       Result := True;
 288       break;
 289     end;
 290   end;
 291
 292   g_Net_Slist_Disconnect;
 293   NetOut.Clear();
 294
 295   if Length(SL) = 0 then
 296   begin
 297     CheckLocalServers();
 298     Exit;
 299   end;
 300
 301   Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 302   if Sock = ENET_SOCKET_NULL then Exit;
 303   enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 304
 305   for I := Low(SL) to High(SL) do
 306     PingServer(SL[I], Sock);
 307
 308   enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 309   PingBcast(Sock);
 310
 311   T := GetTimerMS();
 312
 313   InMsg.Alloc(NET_BUFSIZE);
 314   Buf.data := InMsg.Data;
 315   Buf.dataLength := InMsg.MaxSize;
 316   Cnt := 0;
 317   while GetTimerMS() - T <= 500 do
 318   begin
 319     InMsg.Clear();
 320
 321     RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 322     if RX <= 0 then continue;
 323     InMsg.CurSize := RX;
 324
 325     InMsg.BeginReading();
 326
 327     if InMsg.ReadChar() <> 'D' then continue;
 328     if InMsg.ReadChar() <> 'F' then continue;
 329
 330     FromSL := False;
 331     for I := Low(SL) to High(SL) do
 332       if (SL[I].PingAddr.host = SvAddr.host) and
 333          (SL[I].PingAddr.port = SvAddr.port) then
 334       begin
 335         with SL[I] do
 336         begin
 337           Port := InMsg.ReadWord();
 338           Ping := InMsg.ReadInt64();
 339           Ping := GetTimerMS() - Ping;
 340           Name := InMsg.ReadString();
 341           Map := InMsg.ReadString();
 342           GameMode := InMsg.ReadByte();
 343           Players := InMsg.ReadByte();
 344           MaxPlayers := InMsg.ReadByte();
 345           Protocol := InMsg.ReadByte();
 346           Password := InMsg.ReadByte() = 1;
 347           LocalPl := InMsg.ReadByte();
 348           Bots := InMsg.ReadWord();
 349         end;
 350         FromSL := True;
 351         Inc(Cnt);
 352         break;
 353       end;
 354     if not FromSL then
 355       ProcessLocal();
 356   end;
 357
 358   InMsg.Free();
 359   enet_socket_destroy(Sock);
 360 end;
 361
 362 procedure g_Net_Slist_WriteInfo();
 363 var
 364   Wad, Map: string;
 365   Cli: Byte;
 366 begin
 367   Wad := g_ExtractWadNameNoPath(gMapInfo.Map);
 368   Map := g_ExtractFileName(gMapInfo.Map);
 369
 370   NetOut.Write(NetServerName);
 371
 372   NetOut.Write(Wad + ':\' + Map);
 373   NetOut.Write(gGameSettings.GameMode);
 374
 375   Cli := NetClientCount;
 376   NetOut.Write(Cli);
 377
 378   NetOut.Write(NetMaxClients);
 379
 380   NetOut.Write(Byte(NET_PROTOCOL_VER));
 381   NetOut.Write(Byte(NetPassword <> ''));
 382 end;
 383
 384 procedure g_Net_Slist_Update;
 385 var
 386
 387   P: pENetPacket;
 388
 389 begin
 390   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 391
 392   NetOut.Clear();
 393   NetOut.Write(Byte(NET_MMSG_UPD));
 394   NetOut.Write(NetAddr.port);
 395
 396   g_Net_Slist_WriteInfo();
 397
 398   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 399   enet_peer_send(NetMPeer, NET_MCHAN_UPD, P);
 400
 401   enet_host_flush(NetMHost);
 402   NetOut.Clear();
 403 end;
 404
 405 procedure g_Net_Slist_Remove;
 406 var
 407   P: pENetPacket;
 408 begin
 409   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 410   NetOut.Clear();
 411   NetOut.Write(Byte(NET_MMSG_DEL));
 412   NetOut.Write(NetAddr.port);
 413
 414   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 415   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 416
 417   enet_host_flush(NetMHost);
 418   NetOut.Clear();
 419 end;
 420
 421 function g_Net_Slist_Connect: Boolean;
 422 begin
 423   Result := False;
 424
 425   NetMHost := enet_host_create(nil, 1, NET_MCHANS, 0, 0);
 426   if (NetMHost = nil) then
 427   begin
 428     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 429     Exit;
 430   end;
 431
 432   NetMPeer := enet_host_connect(NetMHost, @NetSlistAddr, NET_MCHANS, 0);
 433   if (NetMPeer = nil) then
 434   begin
 435     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 436     enet_host_destroy(NetMHost);
 437     NetMHost := nil;
 438     Exit;
 439   end;
 440
 441   if (enet_host_service(NetMHost, @NetMEvent, 3000) > 0) then
 442     if NetMEvent.kind = ENET_EVENT_TYPE_CONNECT then
 443     begin
 444       Result := True;
 445       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_CONN]);
 446       Exit;
 447     end
 448     else
 449       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 450         enet_packet_destroy(NetMEvent.packet);
 451
 452   g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_SLIST_ERROR], True);
 453
 454   NetMHost := nil;
 455   NetMPeer := nil;
 456 end;
 457
 458 procedure g_Net_Slist_Disconnect;
 459 begin
 460   if (NetMHost = nil) and (NetMPeer = nil) then Exit;
 461
 462   if NetMode = NET_SERVER then g_Net_Slist_Remove;
 463
 464   enet_peer_disconnect(NetMPeer, 0);
 465   enet_host_flush(NetMHost);
 466
 467   enet_peer_reset(NetMPeer);
 468   enet_host_destroy(NetMHost);
 469
 470   NetMPeer := nil;
 471   NetMHost := nil;
 472
 473   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_DISC]);
 474 end;
 475
 476 procedure g_Net_Slist_Check;
 477 begin
 478   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 479
 480   while (enet_host_service(NetMHost, @NetMEvent, 0) > 0) do
 481   begin
 482     if NetMEvent.kind = ENET_EVENT_TYPE_DISCONNECT then
 483     begin
 484       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_LOST], True);
 485       if NetMPeer <> nil then enet_peer_reset(NetMPeer);
 486       if NetMHost <> nil then enet_host_destroy(NetMHost);
 487       NetMPeer := nil;
 488       NetMHost := nil;
 489       Break;
 490     end
 491     else
 492       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 493         enet_packet_destroy(NetMEvent.packet);
 494   end;
 495 end;
 496
 497 procedure g_Net_Slist_Set(IP: string; Port: Word);
 498 begin
 499   if NetInitDone then
 500   begin
 501     enet_address_set_host(@NetSlistAddr, PChar(Addr(IP[1])));
 502     NetSlistAddr.Port := Port;
 503     e_WriteLog('Masterserver address set to ' + IP + ':' + IntToStr(Port), TMsgType.Notify);
 504   end;
 505 end;
 506
 507 function GetServerFromTable(Index: Integer; SL: TNetServerList; ST: TNetServerTable): TNetServer;
 508 begin
 509   Result.Number := 0;
 510   Result.Protocol := 0;
 511   Result.Name := '';
 512   Result.IP := '';
 513   Result.Port := 0;
 514   Result.Map := '';
 515   Result.Players := 0;
 516   Result.MaxPlayers := 0;
 517   Result.LocalPl := 0;
 518   Result.Bots := 0;
 519   Result.Ping := 0;
 520   Result.GameMode := 0;
 521   Result.Password := false;
 522   FillChar(Result.PingAddr, SizeOf(ENetAddress), 0);
 523   if ST = nil then
 524     Exit;
 525   if (Index < 0) or (Index >= Length(ST)) then
 526     Exit;
 527   Result := SL[ST[Index].Indices[ST[Index].Current]];
 528 end;
 529
 530 procedure g_Serverlist_Draw(var SL: TNetServerList; var ST: TNetServerTable);
 531 var
 532   Srv: TNetServer;
 533   sy, i, y, mw, mx, l: Integer;
 534   cw: Byte = 0;
 535   ch: Byte = 0;
 536   ww: Word = 0;
 537   hh: Word = 0;
 538   ip: string;
 539 begin
 540   ip := '';
 541   sy := 0;
 542
 543   e_CharFont_GetSize(gMenuFont, _lc[I_NET_SLIST], ww, hh);
 544   e_CharFont_Print(gMenuFont, (gScreenWidth div 2) - (ww div 2), 16, _lc[I_NET_SLIST]);
 545
 546   e_TextureFontGetSize(gStdFont, cw, ch);
 547
 548   ip := _lc[I_NET_SLIST_HELP];
 549   mw := (Length(ip) * cw) div 2;
 550
 551   e_DrawFillQuad(16, 64, gScreenWidth-16, gScreenHeight-84, 64, 64, 64, 110);
 552   e_DrawQuad(16, 64, gScreenWidth-16, gScreenHeight-84, 255, 127, 0);
 553
 554   e_TextureFontPrintEx(gScreenWidth div 2 - mw, gScreenHeight-24, ip, gStdFont, 225, 225, 225, 1);
 555
 556   // MOTD
 557   if slMOTD <> '' then
 558   begin
 559     e_DrawFillQuad(16, gScreenHeight-84, gScreenWidth-16, gScreenHeight-44, 64, 64, 64, 110);
 560     e_DrawQuad(16, gScreenHeight-84, gScreenWidth-16, gScreenHeight-44, 255, 127, 0);
 561     e_TextureFontPrintFmt(20, gScreenHeight-81, slMOTD, gStdFont, False, True);
 562   end;
 563
 564   // Urgent message
 565   if not slReadUrgent and (slUrgent <> '') then
 566   begin
 567     e_DrawFillQuad(17, 65, gScreenWidth-17, gScreenHeight-85, 64, 64, 64, 128);
 568     e_DrawFillQuad(gScreenWidth div 2 - 256, gScreenHeight div 2 - 60,
 569       gScreenWidth div 2 + 256, gScreenHeight div 2 + 60, 64, 64, 64, 128);
 570     e_DrawQuad(gScreenWidth div 2 - 256, gScreenHeight div 2 - 60,
 571       gScreenWidth div 2 + 256, gScreenHeight div 2 + 60, 255, 127, 0);
 572     e_DrawLine(1, gScreenWidth div 2 - 256, gScreenHeight div 2 - 40,
 573       gScreenWidth div 2 + 256, gScreenHeight div 2 - 40, 255, 127, 0);
 574     l := Length(_lc[I_NET_SLIST_URGENT]) div 2;
 575     e_TextureFontPrint(gScreenWidth div 2 - cw * l, gScreenHeight div 2 - 58,
 576       _lc[I_NET_SLIST_URGENT], gStdFont);
 577     l := Length(slUrgent) div 2;
 578     e_TextureFontPrintFmt(gScreenWidth div 2 - 253, gScreenHeight div 2 - 38,
 579       slUrgent, gStdFont, False, True);
 580     l := Length(_lc[I_NET_SLIST_URGENT_CONT]) div 2;
 581     e_TextureFontPrint(gScreenWidth div 2 - cw * l, gScreenHeight div 2 + 41,
 582       _lc[I_NET_SLIST_URGENT_CONT], gStdFont);
 583     e_DrawLine(1, gScreenWidth div 2 - 256, gScreenHeight div 2 + 40,
 584       gScreenWidth div 2 + 256, gScreenHeight div 2 + 40, 255, 127, 0);
 585     Exit;
 586   end;
 587
 588   if SL = nil then
 589   begin
 590     l := Length(slWaitStr) div 2;
 591     e_DrawFillQuad(17, 65, gScreenWidth-17, gScreenHeight-85, 64, 64, 64, 128);
 592     e_DrawQuad(gScreenWidth div 2 - 192, gScreenHeight div 2 - 10,
 593       gScreenWidth div 2 + 192, gScreenHeight div 2 + 11, 255, 127, 0);
 594     e_TextureFontPrint(gScreenWidth div 2 - cw * l, gScreenHeight div 2 - ch div 2,
 595       slWaitStr, gStdFont);
 596     Exit;
 597   end;
 598
 599   y := 90;
 600   if (slSelection < Length(ST)) then
 601   begin
 602     I := slSelection;
 603     sy := y + 42 * I - 4;
 604     Srv := GetServerFromTable(I, SL, ST);
 605     ip := _lc[I_NET_ADDRESS] + ' ' + Srv.IP + ':' + IntToStr(Srv.Port);
 606     if Srv.Password then
 607       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_YES]
 608     else
 609       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_NO];
 610   end else
 611     if Length(ST) > 0 then
 612       slSelection := 0;
 613
 614   mw := (gScreenWidth - 188);
 615   mx := 16 + mw;
 616
 617   e_DrawFillQuad(16 + 1, sy, gScreenWidth - 16 - 1, sy + 40, 64, 64, 64, 0);
 618   e_DrawLine(1, 16 + 1, sy, gScreenWidth - 16 - 1, sy, 205, 205, 205);
 619   e_DrawLine(1, 16 + 1, sy + 41, gScreenWidth - 16 - 1, sy + 41, 255, 255, 255);
 620
 621   e_DrawLine(1, 16, 85, gScreenWidth - 16, 85, 255, 127, 0);
 622   e_DrawLine(1, 16, gScreenHeight-104, gScreenWidth-16, gScreenHeight-104, 255, 127, 0);
 623
 624   e_DrawLine(1, mx - 70, 64, mx - 70, gScreenHeight-84, 255, 127, 0);
 625   e_DrawLine(1, mx, 64, mx, gScreenHeight-104, 255, 127, 0);
 626   e_DrawLine(1, mx + 52, 64, mx + 52, gScreenHeight-104, 255, 127, 0);
 627   e_DrawLine(1, mx + 104, 64, mx + 104, gScreenHeight-104, 255, 127, 0);
 628
 629   e_TextureFontPrintEx(18, 68, 'NAME/MAP', gStdFont, 255, 127, 0, 1);
 630   e_TextureFontPrintEx(mx - 68, 68, 'PING', gStdFont, 255, 127, 0, 1);
 631   e_TextureFontPrintEx(mx + 2, 68, 'MODE', gStdFont, 255, 127, 0, 1);
 632   e_TextureFontPrintEx(mx + 54, 68, 'PLRS', gStdFont, 255, 127, 0, 1);
 633   e_TextureFontPrintEx(mx + 106, 68, 'VER', gStdFont, 255, 127, 0, 1);
 634
 635   y := 90;
 636   for I := 0 to High(ST) do
 637   begin
 638     Srv := GetServerFromTable(I, SL, ST);
 639     // Name and map
 640     e_TextureFontPrintEx(18, y, Srv.Name, gStdFont, 255, 255, 255, 1);
 641     e_TextureFontPrintEx(18, y + 16, Srv.Map, gStdFont, 210, 210, 210, 1);
 642
 643     // Ping and similar count
 644     if (Srv.Ping < 0) or (Srv.Ping > 999) then
 645       e_TextureFontPrintEx(mx - 68, y, _lc[I_NET_SLIST_NO_ACCESS], gStdFont, 255, 0, 0, 1)
 646     else
 647       if Srv.Ping = 0 then
 648         e_TextureFontPrintEx(mx - 68, y, '<1' + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1)
 649       else
 650         e_TextureFontPrintEx(mx - 68, y, IntToStr(Srv.Ping) + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1);
 651
 652     if Length(ST[I].Indices) > 1 then
 653       e_TextureFontPrintEx(mx - 68, y + 16, '< ' + IntToStr(Length(ST[I].Indices)) + ' >', gStdFont, 210, 210, 210, 1);
 654
 655     // Game mode
 656     e_TextureFontPrintEx(mx + 2, y, g_Game_ModeToText(Srv.GameMode), gStdFont, 255, 255, 255, 1);
 657
 658     // Players
 659     e_TextureFontPrintEx(mx + 54, y, IntToStr(Srv.Players) + '/' + IntToStr(Srv.MaxPlayers), gStdFont, 255, 255, 255, 1);
 660     e_TextureFontPrintEx(mx + 54, y + 16, IntToStr(Srv.LocalPl) + '+' + IntToStr(Srv.Bots), gStdFont, 210, 210, 210, 1);
 661
 662     // Version
 663     e_TextureFontPrintEx(mx + 106, y, IntToStr(Srv.Protocol), gStdFont, 255, 255, 255, 1);
 664
 665     y := y + 42;
 666   end;
 667
 668   e_TextureFontPrintEx(20, gScreenHeight-101, ip, gStdFont, 205, 205, 205, 1);
 669   ip := IntToStr(Length(ST)) + _lc[I_NET_SLIST_SERVERS];
 670   e_TextureFontPrintEx(gScreenWidth - 48 - (Length(ip) + 1)*cw,
 671     gScreenHeight-101, ip, gStdFont, 205, 205, 205, 1);
 672 end;
 673
 674 procedure g_Serverlist_GenerateTable(SL: TNetServerList; var ST: TNetServerTable);
 675 var
 676   i, j: Integer;
 677
 678   function FindServerInTable(Name: string): Integer;
 679   var
 680     i: Integer;
 681   begin
 682     Result := -1;
 683     if ST = nil then
 684       Exit;
 685     for i := Low(ST) to High(ST) do
 686     begin
 687       if Length(ST[i].Indices) = 0 then
 688         continue;
 689       if SL[ST[i].Indices[0]].Name = Name then
 690       begin
 691         Result := i;
 692         Exit;
 693       end;
 694     end;
 695   end;
 696   function ComparePing(i1, i2: Integer): Boolean;
 697   var
 698     p1, p2: Int64;
 699   begin
 700     p1 := SL[i1].Ping;
 701     p2 := SL[i2].Ping;
 702     if (p1 < 0) then p1 := 999;
 703     if (p2 < 0) then p2 := 999;
 704     Result := p1 > p2;
 705   end;
 706   procedure SortIndices(var ind: Array of Integer);
 707   var
 708     I, J: Integer;
 709     T: Integer;
 710   begin
 711     for I := High(ind) downto Low(ind) do
 712       for J := Low(ind) to High(ind) - 1 do
 713         if ComparePing(ind[j], ind[j+1]) then
 714         begin
 715           T := ind[j];
 716           ind[j] := ind[j+1];
 717           ind[j+1] := T;
 718         end;
 719   end;
 720   procedure SortRows();
 721   var
 722     I, J: Integer;
 723     T: TNetServerRow;
 724   begin
 725     for I := High(ST) downto Low(ST) do
 726       for J := Low(ST) to High(ST) - 1 do
 727         if ComparePing(ST[j].Indices[0], ST[j+1].Indices[0]) then
 728         begin
 729           T := ST[j];
 730           ST[j] := ST[j+1];
 731           ST[j+1] := T;
 732         end;
 733   end;
 734 begin
 735   ST := nil;
 736   if SL = nil then
 737     Exit;
 738   for i := Low(SL) to High(SL) do
 739   begin
 740     j := FindServerInTable(SL[i].Name);
 741     if j = -1 then
 742     begin
 743       j := Length(ST);
 744       SetLength(ST, j + 1);
 745       ST[j].Current := 0;
 746       SetLength(ST[j].Indices, 1);
 747       ST[j].Indices[0] := i;
 748     end
 749     else
 750     begin
 751       SetLength(ST[j].Indices, Length(ST[j].Indices) + 1);
 752       ST[j].Indices[High(ST[j].Indices)] := i;
 753     end;
 754   end;
 755
 756   for i := Low(ST) to High(ST) do
 757     SortIndices(ST[i].Indices);
 758
 759   SortRows();
 760 end;
 761
 762 procedure g_Serverlist_Control(var SL: TNetServerList; var ST: TNetServerTable);
 763 var
 764   qm: Boolean;
 765   Srv: TNetServer;
 766 begin
 767   if gConsoleShow or gChatShow then
 768     Exit;
 769
 770   qm := g_ProcessMessages(); // this updates kbd
 771
 772   if qm or e_KeyPressed(IK_ESCAPE) or e_KeyPressed(VK_ESCAPE) or
 773      e_KeyPressed(JOY0_JUMP) or e_KeyPressed(JOY1_JUMP) or
 774      e_KeyPressed(JOY2_JUMP) or e_KeyPressed(JOY3_JUMP) then
 775   begin
 776     SL := nil;
 777     ST := nil;
 778     gState := STATE_MENU;
 779     g_GUI_ShowWindow('MainMenu');
 780     g_GUI_ShowWindow('NetGameMenu');
 781     g_GUI_ShowWindow('NetClientMenu');
 782     g_Sound_PlayEx(WINDOW_CLOSESOUND);
 783     Exit;
 784   end;
 785
 786   // if there's a message on the screen,
 787   if not slReadUrgent and (slUrgent <> '') then
 788   begin
 789     if e_KeyPressed(IK_RETURN) or e_KeyPressed(IK_KPRETURN) or e_KeyPressed(VK_FIRE) or e_KeyPressed(VK_OPEN) or
 790        e_KeyPressed(JOY0_ATTACK) or e_KeyPressed(JOY1_ATTACK) or e_KeyPressed(JOY2_ATTACK) or e_KeyPressed(JOY3_ATTACK) then
 791       slReadUrgent := True;
 792     Exit;
 793   end;
 794
 795   if e_KeyPressed(IK_SPACE) or e_KeyPressed(VK_JUMP) or
 796      e_KeyPressed(JOY0_ACTIVATE) or e_KeyPressed(JOY1_ACTIVATE) or e_KeyPressed(JOY2_ACTIVATE) or e_KeyPressed(JOY3_ACTIVATE) then
 797   begin
 798     if not slFetched then
 799     begin
 800       slWaitStr := _lc[I_NET_SLIST_WAIT];
 801
 802       g_Game_Draw;
 803       g_window.ReDrawWindow;
 804
 805       if g_Net_Slist_Fetch(SL) then
 806       begin
 807         if SL = nil then
 808           slWaitStr := _lc[I_NET_SLIST_NOSERVERS];
 809       end
 810       else
 811         if SL = nil then
 812           slWaitStr := _lc[I_NET_SLIST_ERROR];
 813       slFetched := True;
 814       slSelection := 0;
 815       g_Serverlist_GenerateTable(SL, ST);
 816     end;
 817   end
 818   else
 819     slFetched := False;
 820
 821   if SL = nil then Exit;
 822
 823   if e_KeyPressed(IK_RETURN) or e_KeyPressed(IK_KPRETURN) or e_KeyPressed(VK_FIRE) or e_KeyPressed(VK_OPEN) or
 824      e_KeyPressed(JOY0_ATTACK) or e_KeyPressed(JOY1_ATTACK) or e_KeyPressed(JOY2_ATTACK) or e_KeyPressed(JOY3_ATTACK) then
 825   begin
 826     if not slReturnPressed then
 827     begin
 828       Srv := GetServerFromTable(slSelection, SL, ST);
 829       if Srv.Password then
 830       begin
 831         PromptIP := Srv.IP;
 832         PromptPort := Srv.Port;
 833         gState := STATE_MENU;
 834         g_GUI_ShowWindow('ClientPasswordMenu');
 835         SL := nil;
 836         ST := nil;
 837         slReturnPressed := True;
 838         Exit;
 839       end
 840       else
 841         g_Game_StartClient(Srv.IP, Srv.Port, '');
 842       SL := nil;
 843       ST := nil;
 844       slReturnPressed := True;
 845       Exit;
 846     end;
 847   end
 848   else
 849     slReturnPressed := False;
 850
 851   if e_KeyPressed(IK_DOWN) or e_KeyPressed(IK_KPDOWN) or e_KeyPressed(VK_DOWN) or
 852      e_KeyPressed(JOY0_DOWN) or e_KeyPressed(JOY1_DOWN) or e_KeyPressed(JOY2_DOWN) or e_KeyPressed(JOY3_DOWN) then
 853   begin
 854     if not slDirPressed then
 855     begin
 856       Inc(slSelection);
 857       if slSelection > High(ST) then slSelection := 0;
 858       slDirPressed := True;
 859     end;
 860   end;
 861
 862   if e_KeyPressed(IK_UP) or e_KeyPressed(IK_KPUP) or e_KeyPressed(VK_UP) or
 863      e_KeyPressed(JOY0_UP) or e_KeyPressed(JOY1_UP) or e_KeyPressed(JOY2_UP) or e_KeyPressed(JOY3_UP) then
 864   begin
 865     if not slDirPressed then
 866     begin
 867       if slSelection = 0 then slSelection := Length(ST);
 868       Dec(slSelection);
 869
 870       slDirPressed := True;
 871     end;
 872   end;
 873
 874   if e_KeyPressed(IK_RIGHT) or e_KeyPressed(IK_KPRIGHT) or e_KeyPressed(VK_RIGHT) or
 875      e_KeyPressed(JOY0_RIGHT) or e_KeyPressed(JOY1_RIGHT) or e_KeyPressed(JOY2_RIGHT) or e_KeyPressed(JOY3_RIGHT) then
 876   begin
 877     if not slDirPressed then
 878     begin
 879       Inc(ST[slSelection].Current);
 880       if ST[slSelection].Current > High(ST[slSelection].Indices) then ST[slSelection].Current := 0;
 881       slDirPressed := True;
 882     end;
 883   end;
 884
 885   if e_KeyPressed(IK_LEFT) or e_KeyPressed(IK_KPLEFT) or e_KeyPressed(VK_LEFT) or
 886      e_KeyPressed(JOY0_LEFT) or e_KeyPressed(JOY1_LEFT) or e_KeyPressed(JOY2_LEFT) or e_KeyPressed(JOY3_LEFT) then
 887   begin
 888     if not slDirPressed then
 889     begin
 890       if ST[slSelection].Current = 0 then ST[slSelection].Current := Length(ST[slSelection].Indices);
 891       Dec(ST[slSelection].Current);
 892
 893       slDirPressed := True;
 894     end;
 895   end;
 896
 897   if (not e_KeyPressed(IK_DOWN)) and
 898      (not e_KeyPressed(IK_UP)) and
 899      (not e_KeyPressed(IK_RIGHT)) and
 900      (not e_KeyPressed(IK_LEFT)) and
 901      (not e_KeyPressed(IK_KPDOWN)) and
 902      (not e_KeyPressed(IK_KPUP)) and
 903      (not e_KeyPressed(IK_KPRIGHT)) and
 904      (not e_KeyPressed(IK_KPLEFT)) and
 905      (not e_KeyPressed(VK_DOWN)) and
 906      (not e_KeyPressed(VK_UP)) and
 907      (not e_KeyPressed(VK_RIGHT)) and
 908      (not e_KeyPressed(VK_LEFT)) and
 909      (not e_KeyPressed(JOY0_UP)) and (not e_KeyPressed(JOY1_UP)) and (not e_KeyPressed(JOY2_UP)) and (not e_KeyPressed(JOY3_UP)) and
 910      (not e_KeyPressed(JOY0_DOWN)) and (not e_KeyPressed(JOY1_DOWN)) and (not e_KeyPressed(JOY2_DOWN)) and (not e_KeyPressed(JOY3_DOWN)) and
 911      (not e_KeyPressed(JOY0_LEFT)) and (not e_KeyPressed(JOY1_LEFT)) and (not e_KeyPressed(JOY2_LEFT)) and (not e_KeyPressed(JOY3_LEFT)) and
 912      (not e_KeyPressed(JOY0_RIGHT)) and (not e_KeyPressed(JOY1_RIGHT)) and (not e_KeyPressed(JOY2_RIGHT)) and (not e_KeyPressed(JOY3_RIGHT))
 913  then
 914     slDirPressed := False;
 915 end;
 916
 917 end.