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
  49   TNetServerList = array of TNetServer;
  50   pTNetServerList = ^TNetServerList;
  51
  52 var
  53   NetMHost:       pENetHost = nil;
  54   NetMPeer:       pENetPeer = nil;
  55
  56   slCurrent:       TNetServerList = nil;
  57   slWaitStr:       string = '';
  58   slReturnPressed: Boolean = True;
  59
  60 procedure g_Net_Slist_Set(IP: string; Port: Word);
  61 function  g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
  62 procedure g_Net_Slist_Update();
  63 procedure g_Net_Slist_Remove();
  64 function  g_Net_Slist_Connect(): Boolean;
  65 procedure g_Net_Slist_Check();
  66 procedure g_Net_Slist_Disconnect();
  67 procedure g_Net_Slist_WriteInfo();
  68
  69 procedure g_Serverlist_Draw(var SL: TNetServerList);
  70 procedure g_Serverlist_Control(var SL: TNetServerList);
  71
  72 implementation
  73
  74 uses
  75   SysUtils, e_msg, e_input, e_graphics, e_log, g_window, g_net, g_console,
  76   g_map, g_game, g_sound, g_gui, g_menu, g_options, g_language, wadreader;
  77
  78 var
  79   NetMEvent:      ENetEvent;
  80   slSelection:    Byte = 0;
  81   slFetched:      Boolean = False;
  82   slDirPressed:   Boolean = False;
  83
  84 function GetTimerMS(): Int64;
  85 begin
  86   Result := GetTimer() {div 1000};
  87 end;
  88
  89 procedure PingServer(var S: TNetServer; Sock: ENetSocket);
  90 var
  91   Buf: ENetBuffer;
  92   Ping: array [0..9] of Byte;
  93   ClTime: Int64;
  94 begin
  95   ClTime := GetTimerMS();
  96
  97   Buf.data := Addr(Ping[0]);
  98   Buf.dataLength := 2+8;
  99
 100   Ping[0] := Ord('D');
 101   Ping[1] := Ord('F');
 102   Int64(Addr(Ping[2])^) := ClTime;
 103
 104   enet_socket_send(Sock, Addr(S.PingAddr), @Buf, 1);
 105 end;
 106
 107 procedure PingBcast(Sock: ENetSocket);
 108 var
 109   S: TNetServer;
 110 begin
 111   S.IP := '255.255.255.255';
 112   S.Port := NET_PING_PORT;
 113   enet_address_set_host(Addr(S.PingAddr), PChar(Addr(S.IP[1])));
 114   S.Ping := -1;
 115   S.PingAddr.port := S.Port;
 116   PingServer(S, Sock);
 117 end;
 118
 119 function g_Net_Slist_Fetch(var SL: TNetServerList): Boolean;
 120 var
 121   Cnt: Byte;
 122   P: pENetPacket;
 123   MID: Byte;
 124   I, RX: Integer;
 125   T: Int64;
 126   Sock: ENetSocket;
 127   Buf: ENetBuffer;
 128   InMsg: TMsg;
 129   SvAddr: ENetAddress;
 130   FromSL: Boolean;
 131
 132   procedure ProcessLocal();
 133   begin
 134     I := Length(SL);
 135     SetLength(SL, I + 1);
 136     with SL[I] do
 137     begin
 138       IP := DecodeIPV4(SvAddr.host);
 139       Port := InMsg.ReadWord();
 140       Ping := InMsg.ReadInt64();
 141       Ping := GetTimerMS() - Ping;
 142       Name := InMsg.ReadString();
 143       Map := InMsg.ReadString();
 144       GameMode := InMsg.ReadByte();
 145       Players := InMsg.ReadByte();
 146       MaxPlayers := InMsg.ReadByte();
 147       Protocol := InMsg.ReadByte();
 148       Password := InMsg.ReadByte() = 1;
 149       LocalPl := InMsg.ReadByte();
 150       Bots := InMsg.ReadWord();
 151     end;
 152   end;
 153   procedure CheckLocalServers();
 154   begin
 155     SetLength(SL, 0);
 156
 157     Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 158     if Sock = ENET_SOCKET_NULL then Exit;
 159     enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 160     enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 161     PingBcast(Sock);
 162
 163     T := GetTimerMS();
 164
 165     InMsg.Alloc(NET_BUFSIZE);
 166     Buf.data := InMsg.Data;
 167     Buf.dataLength := InMsg.MaxSize;
 168     while GetTimerMS() - T <= 500 do
 169     begin
 170       InMsg.Clear();
 171
 172       RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 173       if RX <= 0 then continue;
 174       InMsg.CurSize := RX;
 175
 176       InMsg.BeginReading();
 177
 178       if InMsg.ReadChar() <> 'D' then continue;
 179       if InMsg.ReadChar() <> 'F' then continue;
 180
 181       ProcessLocal();
 182     end;
 183
 184     InMsg.Free();
 185     enet_socket_destroy(Sock);
 186
 187     if Length(SL) = 0 then SL := nil;
 188   end;
 189 begin
 190   Result := False;
 191   SL := nil;
 192
 193   if (NetMHost <> nil) or (NetMPeer <> nil) then
 194   begin
 195     CheckLocalServers();
 196     Exit;
 197   end;
 198
 199   if not g_Net_Slist_Connect then
 200   begin
 201     CheckLocalServers();
 202     Exit;
 203   end;
 204
 205   e_WriteLog('Fetching serverlist...', TMsgType.Notify);
 206   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_FETCH]);
 207
 208   NetOut.Clear();
 209   NetOut.Write(Byte(NET_MMSG_GET));
 210
 211   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 212   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 213   enet_host_flush(NetMHost);
 214
 215   while enet_host_service(NetMHost, @NetMEvent, 5000) > 0 do
 216   begin
 217     if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 218     begin
 219       if not InMsg.Init(NetMEvent.packet^.data, NetMEvent.packet^.dataLength, True) then continue;
 220
 221       MID := InMsg.ReadByte();
 222
 223       if MID <> NET_MMSG_GET then continue;
 224
 225       Cnt := InMsg.ReadByte();
 226       g_Console_Add(_lc[I_NET_MSG] + Format(_lc[I_NET_SLIST_RETRIEVED], [Cnt]), True);
 227
 228       if Cnt > 0 then
 229       begin
 230         SetLength(SL, Cnt);
 231
 232         for I := 0 to Cnt - 1 do
 233         begin
 234           SL[I].Number := I;
 235           SL[I].IP := InMsg.ReadString();
 236           SL[I].Port := InMsg.ReadWord();
 237           SL[I].Name := InMsg.ReadString();
 238           SL[I].Map := InMsg.ReadString();
 239           SL[I].GameMode := InMsg.ReadByte();
 240           SL[I].Players := InMsg.ReadByte();
 241           SL[I].MaxPlayers := InMsg.ReadByte();
 242           SL[I].Protocol := InMsg.ReadByte();
 243           SL[I].Password := InMsg.ReadByte() = 1;
 244           enet_address_set_host(Addr(SL[I].PingAddr), PChar(Addr(SL[I].IP[1])));
 245           SL[I].Ping := -1;
 246           SL[I].PingAddr.port := NET_PING_PORT;
 247         end;
 248       end;
 249
 250       Result := True;
 251       break;
 252     end;
 253   end;
 254
 255   g_Net_Slist_Disconnect;
 256   NetOut.Clear();
 257
 258   if Length(SL) = 0 then
 259   begin
 260     CheckLocalServers();
 261     Exit;
 262   end;
 263
 264   Sock := enet_socket_create(ENET_SOCKET_TYPE_DATAGRAM);
 265   if Sock = ENET_SOCKET_NULL then Exit;
 266   enet_socket_set_option(Sock, ENET_SOCKOPT_NONBLOCK, 1);
 267
 268   for I := Low(SL) to High(SL) do
 269     PingServer(SL[I], Sock);
 270
 271   enet_socket_set_option(Sock, ENET_SOCKOPT_BROADCAST, 1);
 272   PingBcast(Sock);
 273
 274   T := GetTimerMS();
 275
 276   InMsg.Alloc(NET_BUFSIZE);
 277   Buf.data := InMsg.Data;
 278   Buf.dataLength := InMsg.MaxSize;
 279   Cnt := 0;
 280   while GetTimerMS() - T <= 500 do
 281   begin
 282     InMsg.Clear();
 283
 284     RX := enet_socket_receive(Sock, @SvAddr, @Buf, 1);
 285     if RX <= 0 then continue;
 286     InMsg.CurSize := RX;
 287
 288     InMsg.BeginReading();
 289
 290     if InMsg.ReadChar() <> 'D' then continue;
 291     if InMsg.ReadChar() <> 'F' then continue;
 292
 293     FromSL := False;
 294     for I := Low(SL) to High(SL) do
 295       if (SL[I].PingAddr.host = SvAddr.host) and
 296          (SL[I].PingAddr.port = SvAddr.port) then
 297       begin
 298         with SL[I] do
 299         begin
 300           Port := InMsg.ReadWord();
 301           Ping := InMsg.ReadInt64();
 302           Ping := GetTimerMS() - Ping;
 303           Name := InMsg.ReadString();
 304           Map := InMsg.ReadString();
 305           GameMode := InMsg.ReadByte();
 306           Players := InMsg.ReadByte();
 307           MaxPlayers := InMsg.ReadByte();
 308           Protocol := InMsg.ReadByte();
 309           Password := InMsg.ReadByte() = 1;
 310           LocalPl := InMsg.ReadByte();
 311           Bots := InMsg.ReadWord();
 312         end;
 313         FromSL := True;
 314         Inc(Cnt);
 315         break;
 316       end;
 317     if not FromSL then
 318       ProcessLocal();
 319   end;
 320
 321   InMsg.Free();
 322   enet_socket_destroy(Sock);
 323 end;
 324
 325 procedure g_Net_Slist_WriteInfo();
 326 var
 327   Wad, Map: string;
 328   Cli: Byte;
 329 begin
 330   Wad := g_ExtractWadNameNoPath(gMapInfo.Map);
 331   Map := g_ExtractFileName(gMapInfo.Map);
 332
 333   NetOut.Write(NetServerName);
 334
 335   NetOut.Write(Wad + ':\' + Map);
 336   NetOut.Write(gGameSettings.GameMode);
 337
 338   Cli := NetClientCount;
 339   NetOut.Write(Cli);
 340
 341   NetOut.Write(NetMaxClients);
 342
 343   NetOut.Write(Byte(NET_PROTOCOL_VER));
 344   NetOut.Write(Byte(NetPassword <> ''));
 345 end;
 346
 347 procedure g_Net_Slist_Update;
 348 var
 349
 350   P: pENetPacket;
 351
 352 begin
 353   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 354
 355   NetOut.Clear();
 356   NetOut.Write(Byte(NET_MMSG_UPD));
 357   NetOut.Write(NetAddr.port);
 358
 359   g_Net_Slist_WriteInfo();
 360
 361   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 362   enet_peer_send(NetMPeer, NET_MCHAN_UPD, P);
 363
 364   enet_host_flush(NetMHost);
 365   NetOut.Clear();
 366 end;
 367
 368 procedure g_Net_Slist_Remove;
 369 var
 370   P: pENetPacket;
 371 begin
 372   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 373   NetOut.Clear();
 374   NetOut.Write(Byte(NET_MMSG_DEL));
 375   NetOut.Write(NetAddr.port);
 376
 377   P := enet_packet_create(NetOut.Data, NetOut.CurSize, Cardinal(ENET_PACKET_FLAG_RELIABLE));
 378   enet_peer_send(NetMPeer, NET_MCHAN_MAIN, P);
 379
 380   enet_host_flush(NetMHost);
 381   NetOut.Clear();
 382 end;
 383
 384 function g_Net_Slist_Connect: Boolean;
 385 begin
 386   Result := False;
 387
 388   NetMHost := enet_host_create(nil, 1, NET_MCHANS, 0, 0);
 389   if (NetMHost = nil) then
 390   begin
 391     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 392     Exit;
 393   end;
 394
 395   NetMPeer := enet_host_connect(NetMHost, @NetSlistAddr, NET_MCHANS, 0);
 396   if (NetMPeer = nil) then
 397   begin
 398     g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CLIENT], True);
 399     enet_host_destroy(NetMHost);
 400     NetMHost := nil;
 401     Exit;
 402   end;
 403
 404   if (enet_host_service(NetMHost, @NetMEvent, 3000) > 0) then
 405     if NetMEvent.kind = ENET_EVENT_TYPE_CONNECT then
 406     begin
 407       Result := True;
 408       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_CONN]);
 409       Exit;
 410     end
 411     else
 412       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 413         enet_packet_destroy(NetMEvent.packet);
 414
 415   g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_SLIST_ERROR], True);
 416
 417   NetMHost := nil;
 418   NetMPeer := nil;
 419 end;
 420
 421 procedure g_Net_Slist_Disconnect;
 422 begin
 423   if (NetMHost = nil) and (NetMPeer = nil) then Exit;
 424
 425   if NetMode = NET_SERVER then g_Net_Slist_Remove;
 426
 427   enet_peer_disconnect(NetMPeer, 0);
 428   enet_host_flush(NetMHost);
 429
 430   enet_peer_reset(NetMPeer);
 431   enet_host_destroy(NetMHost);
 432
 433   NetMPeer := nil;
 434   NetMHost := nil;
 435
 436   g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_DISC]);
 437 end;
 438
 439 procedure g_Net_Slist_Check;
 440 begin
 441   if (NetMHost = nil) or (NetMPeer = nil) then Exit;
 442
 443   while (enet_host_service(NetMHost, @NetMEvent, 0) > 0) do
 444   begin
 445     if NetMEvent.kind = ENET_EVENT_TYPE_DISCONNECT then
 446     begin
 447       g_Console_Add(_lc[I_NET_MSG] + _lc[I_NET_SLIST_LOST], True);
 448       if NetMPeer <> nil then enet_peer_reset(NetMPeer);
 449       if NetMHost <> nil then enet_host_destroy(NetMHost);
 450       NetMPeer := nil;
 451       NetMHost := nil;
 452       Break;
 453     end
 454     else
 455       if NetMEvent.kind = ENET_EVENT_TYPE_RECEIVE then
 456         enet_packet_destroy(NetMEvent.packet);
 457   end;
 458 end;
 459
 460 procedure g_Net_Slist_Set(IP: string; Port: Word);
 461 begin
 462   if NetInitDone then
 463   begin
 464     enet_address_set_host(@NetSlistAddr, PChar(Addr(IP[1])));
 465     NetSlistAddr.Port := Port;
 466     e_WriteLog('Masterserver address set to ' + IP + ':' + IntToStr(Port), TMsgType.Notify);
 467   end;
 468 end;
 469
 470 procedure g_Serverlist_Draw(var SL: TNetServerList);
 471 var
 472   sy, i, y, mw, mx, l: Integer;
 473   cw: Byte = 0;
 474   ch: Byte = 0;
 475   ww: Word = 0;
 476   hh: Word = 0;
 477   ip: string;
 478 begin
 479   ip := '';
 480   sy := 0;
 481
 482   e_CharFont_GetSize(gMenuFont, _lc[I_NET_SLIST], ww, hh);
 483   e_CharFont_Print(gMenuFont, (gScreenWidth div 2) - (ww div 2), 16, _lc[I_NET_SLIST]);
 484
 485   e_TextureFontGetSize(gStdFont, cw, ch);
 486
 487   ip := _lc[I_NET_SLIST_HELP];
 488   mw := (Length(ip) * cw) div 2;
 489
 490   e_DrawFillQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 64, 64, 64, 110);
 491   e_DrawQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 255, 127, 0);
 492
 493   e_TextureFontPrintEx(gScreenWidth div 2 - mw, gScreenHeight-24, ip, gStdFont, 225, 225, 225, 1);
 494
 495   if SL = nil then
 496   begin
 497     l := Length(slWaitStr) div 2;
 498     e_DrawFillQuad(16, 64, gScreenWidth-16, gScreenHeight-44, 64, 64, 64, 128);
 499     e_DrawQuad(gScreenWidth div 2 - 192, gScreenHeight div 2 - 10,
 500       gScreenWidth div 2 + 192, gScreenHeight div 2 + 11, 255, 127, 0);
 501     e_TextureFontPrint(gScreenWidth div 2 - cw * l, gScreenHeight div 2 - ch div 2,
 502       slWaitStr, gStdFont);
 503     Exit;
 504   end;
 505
 506   y := 90;
 507   if (slSelection < Length(SL)) then
 508   begin
 509     I := slSelection;
 510     sy := y + 42 * I - 4;
 511     ip := _lc[I_NET_ADDRESS] + ' ' + SL[I].IP + ':' + IntToStr(SL[I].Port);
 512     if SL[I].Password then
 513       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_YES]
 514     else
 515       ip := ip + '  ' + _lc[I_NET_SERVER_PASSWORD] + ' ' + _lc[I_MENU_NO];
 516   end else
 517     if Length(SL) > 0 then
 518       slSelection := 0;
 519
 520   mw := (gScreenWidth - 188);
 521   mx := 16 + mw;
 522
 523   e_DrawFillQuad(16 + 1, sy, gScreenWidth - 16 - 1, sy + 40, 64, 64, 64, 0);
 524   e_DrawLine(1, 16 + 1, sy, gScreenWidth - 16 - 1, sy, 205, 205, 205);
 525   e_DrawLine(1, 16 + 1, sy + 41, gScreenWidth - 16 - 1, sy + 41, 255, 255, 255);
 526
 527   e_DrawLine(1, 16, 85, gScreenWidth - 16, 85, 255, 127, 0);
 528   e_DrawLine(1, 16, gScreenHeight-64, gScreenWidth-16, gScreenHeight-64, 255, 127, 0);
 529
 530   e_DrawLine(1, mx - 70, 64, mx - 70, gScreenHeight-44, 255, 127, 0);
 531   e_DrawLine(1, mx, 64, mx, gScreenHeight-64, 255, 127, 0);
 532   e_DrawLine(1, mx + 52, 64, mx + 52, gScreenHeight-64, 255, 127, 0);
 533   e_DrawLine(1, mx + 104, 64, mx + 104, gScreenHeight-64, 255, 127, 0);
 534
 535   e_TextureFontPrintEx(18, 68, 'NAME/MAP', gStdFont, 255, 127, 0, 1);
 536
 537   y := 90;
 538   for I := 0 to High(SL) do
 539   begin
 540     e_TextureFontPrintEx(18, y, SL[I].Name, gStdFont, 255, 255, 255, 1);
 541     e_TextureFontPrintEx(18, y + 16, SL[I].Map, gStdFont, 210, 210, 210, 1);
 542
 543     y := y + 42;
 544   end;
 545
 546   e_TextureFontPrintEx(mx - 68, 68, 'PING', gStdFont, 255, 127, 0, 1);
 547   y := 90;
 548   for I := 0 to High(SL) do
 549   begin
 550     if (SL[I].Ping < 0) or (SL[I].Ping > 999) then
 551       e_TextureFontPrintEx(mx - 68, y, _lc[I_NET_SLIST_NO_ACCESS], gStdFont, 255, 0, 0, 1)
 552     else
 553       if SL[I].Ping = 0 then
 554         e_TextureFontPrintEx(mx - 68, y, '<1' + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1)
 555       else
 556         e_TextureFontPrintEx(mx - 68, y, IntToStr(SL[I].Ping) + _lc[I_NET_SLIST_PING_MS], gStdFont, 255, 255, 255, 1);
 557
 558     y := y + 42;
 559   end;
 560
 561   e_TextureFontPrintEx(mx + 2, 68, 'MODE', gStdFont, 255, 127, 0, 1);
 562   y := 90;
 563   for I := 0 to High(SL) do
 564   begin
 565     e_TextureFontPrintEx(mx + 2, y, g_Game_ModeToText(SL[I].GameMode), gStdFont, 255, 255, 255, 1);
 566
 567     y := y + 42;
 568   end;
 569
 570   e_TextureFontPrintEx(mx + 54, 68, 'PLRS', gStdFont, 255, 127, 0, 1);
 571   y := 90;
 572   for I := 0 to High(SL) do
 573   begin
 574     e_TextureFontPrintEx(mx + 54, y, IntToStr(SL[I].Players) + '/' + IntToStr(SL[I].MaxPlayers), gStdFont, 255, 255, 255, 1);
 575     e_TextureFontPrintEx(mx + 54, y + 16, IntToStr(SL[I].LocalPl) + '+' + IntToStr(SL[I].Bots), gStdFont, 210, 210, 210, 1);
 576     y := y + 42;
 577   end;
 578
 579   e_TextureFontPrintEx(mx + 106, 68, 'VER', gStdFont, 255, 127, 0, 1);
 580   y := 90;
 581   for I := 0 to High(SL) do
 582   begin
 583     e_TextureFontPrintEx(mx + 106, y, IntToStr(SL[I].Protocol), gStdFont, 255, 255, 255, 1);
 584
 585     y := y + 42;
 586   end;
 587
 588   e_TextureFontPrintEx(20, gScreenHeight-61, ip, gStdFont, 205, 205, 205, 1);
 589   ip := IntToStr(Length(SL)) + _lc[I_NET_SLIST_SERVERS];
 590   e_TextureFontPrintEx(gScreenWidth - 48 - (Length(ip) + 1)*cw,
 591     gScreenHeight-61, ip, gStdFont, 205, 205, 205, 1);
 592 end;
 593
 594 procedure g_Serverlist_Control(var SL: TNetServerList);
 595 var
 596   qm: Boolean;
 597 begin
 598   if gConsoleShow or gChatShow then
 599     Exit;
 600
 601   qm := g_ProcessMessages(); // this updates kbd
 602
 603   if qm or e_KeyPressed(IK_ESCAPE) or e_KeyPressed(VK_ESCAPE) then
 604   begin
 605     SL := nil;
 606     gState := STATE_MENU;
 607     g_GUI_ShowWindow('MainMenu');
 608     g_GUI_ShowWindow('NetGameMenu');
 609     g_GUI_ShowWindow('NetClientMenu');
 610     g_Sound_PlayEx(WINDOW_CLOSESOUND);
 611     Exit;
 612   end;
 613
 614   if e_KeyPressed(IK_SPACE) or e_KeyPressed(VK_JUMP) then
 615   begin
 616     if not slFetched then
 617     begin
 618       slWaitStr := _lc[I_NET_SLIST_WAIT];
 619
 620       g_Game_Draw;
 621       g_window.ReDrawWindow;
 622
 623       if g_Net_Slist_Fetch(SL) then
 624       begin
 625         if SL = nil then
 626           slWaitStr := _lc[I_NET_SLIST_NOSERVERS];
 627       end
 628       else
 629         if SL = nil then
 630           slWaitStr := _lc[I_NET_SLIST_ERROR];
 631       slFetched := True;
 632       slSelection := 0;
 633     end;
 634   end
 635   else
 636     slFetched := False;
 637
 638   if SL = nil then Exit;
 639
 640   if e_KeyPressed(IK_RETURN) or e_KeyPressed(IK_KPRETURN) or e_KeyPressed(VK_FIRE) or e_KeyPressed(VK_OPEN) then
 641   begin
 642     if not slReturnPressed then
 643     begin
 644       if SL[slSelection].Password then
 645       begin
 646         PromptIP := SL[slSelection].IP;
 647         PromptPort := SL[slSelection].Port;
 648         gState := STATE_MENU;
 649         g_GUI_ShowWindow('ClientPasswordMenu');
 650         SL := nil;
 651         slReturnPressed := True;
 652         Exit;
 653       end
 654       else
 655         g_Game_StartClient(SL[slSelection].IP, SL[slSelection].Port, '');
 656       SL := nil;
 657       slReturnPressed := True;
 658       Exit;
 659     end;
 660   end
 661   else
 662     slReturnPressed := False;
 663
 664   if e_KeyPressed(IK_DOWN) or e_KeyPressed(IK_KPDOWN) or e_KeyPressed(VK_DOWN) then
 665   begin
 666     if not slDirPressed then
 667     begin
 668       Inc(slSelection);
 669       if slSelection > High(SL) then slSelection := 0;
 670       slDirPressed := True;
 671     end;
 672   end;
 673
 674   if e_KeyPressed(IK_UP) or e_KeyPressed(IK_KPUP) or e_KeyPressed(VK_UP) then
 675   begin
 676     if not slDirPressed then
 677     begin
 678       if slSelection = 0 then slSelection := Length(SL);
 679       Dec(slSelection);
 680
 681       slDirPressed := True;
 682     end;
 683   end;
 684
 685   if (not e_KeyPressed(IK_DOWN)) and (not e_KeyPressed(IK_UP)) and (not e_KeyPressed(IK_KPDOWN)) and (not e_KeyPressed(IK_KPUP)) and (not e_KeyPressed(VK_DOWN)) and (not e_KeyPressed(VK_UP)) then
 686     slDirPressed := False;
 687 end;
 688
 689 end.