(*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
{$INCLUDE "options.inc"}
unit uIO;
interface
uses SDLh, uTypes;
procedure initModule;
procedure freeModule;
procedure InitIPC;
procedure SendIPC(s: shortstring);
procedure SendIPCXY(cmd: char; X, Y: LongInt);
procedure SendIPCRaw(p: pointer; len: Longword);
procedure SendIPCAndWaitReply(s: shortstring);
procedure FlushMessages(Lag: Longword);
procedure LoadRecordFromFile(fileName: shortstring);
procedure SendStat(sit: TStatInfoType; s: shortstring);
procedure IPCWaitPongEvent;
procedure IPCCheckSock;
procedure NetGetNextCmd;
procedure doPut(putX, putY: LongInt; fromAI: boolean);
implementation
uses uConsole, uConsts, uVariables, uCommands, uUtils, uDebug, uLocale, uSound;
const
cSendEmptyPacketTime = 1000;
cSendBufferSize = 1024;
type PCmd = ^TCmd;
TCmd = packed record
Next: PCmd;
loTime: Word;
case byte of
1: (len: byte;
cmd: Char);
2: (str: shortstring);
end;
var IPCSock: PTCPSocket;
fds: PSDLNet_SocketSet;
isPonged: boolean;
SocketString: shortstring;
headcmd: PCmd;
lastcmd: PCmd;
flushDelayTicks: LongWord;
sendBuffer: record
buf: array[0..Pred(cSendBufferSize)] of byte;
count: Word;
end;
function AddCmd(Time: Word; str: shortstring): PCmd;
var command: PCmd;
begin
if (lastcmd <> nil)
and (lastcmd^.cmd = '+') // don't overwrite timestamped msg with non-timestamped one
and (str[1] <> 'F')
and (str[1] <> 'G')
and (str[1] <> 's')
and (str[1] <> 'h')
and (str[1] <> 'b')
then
begin
command:= lastcmd;
end else
begin
new(command);
if headcmd = nil then
begin
headcmd:= command;
lastcmd:= command
end
else
begin
lastcmd^.Next:= command;
lastcmd:= command
end;
end;
FillChar(command^, sizeof(TCmd), 0);
command^.loTime:= Time;
command^.str:= str;
if (command^.cmd <> 'F') and (command^.cmd <> 'G') then dec(command^.len, 2); // cut timestamp
AddCmd:= command;
end;
procedure RemoveCmd;
var tmp: PCmd;
begin
tmp:= headcmd;
headcmd:= headcmd^.Next;
if headcmd = nil then
lastcmd:= nil;
dispose(tmp)
end;
procedure InitIPC;
var ipaddr: TIPAddress;
begin
WriteToConsole('Init SDL_Net... ');
SDLCheck(SDLNet_Init = 0, 'SDLNet_Init', true);
fds:= SDLNet_AllocSocketSet(1);
SDLCheck(fds <> nil, 'SDLNet_AllocSocketSet', true);
WriteLnToConsole(msgOK);
WriteToConsole('Establishing IPC connection to tcp 127.0.0.1:' + IntToStr(ipcPort) + ' ');
{$HINTS OFF}
SDLCheck(SDLNet_ResolveHost(ipaddr, PChar('127.0.0.1'), ipcPort) = 0, 'SDLNet_ResolveHost', true);
{$HINTS ON}
IPCSock:= SDLNet_TCP_Open(ipaddr);
SDLCheck(IPCSock <> nil, 'SDLNet_TCP_Open', true);
WriteLnToConsole(msgOK)
end;
procedure ParseChatCommand(command: shortstring; message: shortstring;
messageStartIndex: Byte);
var
text: shortstring;
begin
text:= copy(message, messageStartIndex,
Length(message) - messageStartIndex + 1);
ParseCommand(command + text, true);
WriteLnToConsole(text)
end;
procedure ParseIPCCommand(s: shortstring);
var loTicks: Word;
isProcessed: boolean;
nick, msg: shortstring;
i: LongInt;
begin
isProcessed := true;
case s[1] of
'!': begin AddFileLog('Ping? Pong!'); isPonged:= true; end;
'?': SendIPC(_S'!');
'e': ParseCommand(copy(s, 2, Length(s) - 1), true);
'E': OutError(copy(s, 2, Length(s) - 1), true);
'W': OutError(copy(s, 2, Length(s) - 1), false);
'M': ParseCommand('landcheck ' + s, true);
'o': if fastUntilLag then ParseCommand('forcequit', true);
'T': case s[2] of
'L': GameType:= gmtLocal;
'D': GameType:= gmtDemo;
'N': GameType:= gmtNet;
'S': GameType:= gmtSave;
'V': GameType:= gmtRecord;
else OutError(errmsgIncorrectUse + ' IPC "T" :' + s[2], true) end;
'V': begin
if s[2] = '.' then
ParseCommand('campvar ' + copy(s, 3, length(s) - 2), true);
end;
'v': begin
if s[2] = '.' then
ParseCommand('missvar ' + copy(s, 3, length(s) - 2), true);
end;
'I': ParseCommand('pause server', true);
's': if gameType = gmtNet then
ParseChatCommand('chatmsg ', s, 2)
else
isProcessed:= false;
'b': if gameType = gmtNet then
// parse team message from net
// expected format: <PLAYER NAME>]<MESSAGE>
begin
i:= 2;
nick:= '';
while (i <= length(s)) and (s[i] <> ']') do
begin
nick:= nick + s[i];
inc(i)
end;
inc(i);
msg:= '';
while (i <= length(s)) do
begin
msg:= msg + s[i];
inc(i)
end;
s:= 'b' + Format(shortstring(trmsg[sidChatTeam]), nick, msg);
if (nick = '') or (msg = '') then
isProcessed:= false
else
ParseChatCommand('chatmsg ' + #4, s, 2);
end
else
isProcessed:= false;
else
isProcessed:= false;
end;
if (not isProcessed) then
begin
loTicks:= SDLNet_Read16(@s[byte(s[0]) - 1]);
AddCmd(loTicks, s);
AddFileLog('[IPC in] ' + sanitizeCharForLog(s[1]) + ' ticks ' + IntToStr(lastcmd^.loTime));
end
end;
procedure IPCCheckSock;
var i: LongInt;
s: shortstring;
begin
if IPCSock = nil then
exit;
fds^.numsockets:= 0;
SDLNet_AddSocket(fds, IPCSock);
while SDLNet_CheckSockets(fds, 0) > 0 do
begin
i:= SDLNet_TCP_Recv(IPCSock, @s[1], 255 - Length(SocketString));
if i > 0 then
begin
s[0]:= char(i);
SocketString:= SocketString + s;
while (Length(SocketString) > 1) and (Length(SocketString) > byte(SocketString[1])) do
begin
ParseIPCCommand(copy(SocketString, 2, byte(SocketString[1])));
Delete(SocketString, 1, Succ(byte(SocketString[1])))
end
end
else
OutError('IPC connection lost', true)
end;
end;
procedure LoadRecordFromFile(fileName: shortstring);
var f : File;
ss : shortstring = '';
i : LongInt;
s : shortstring;
begin
// set RDNLY on file open
filemode:= 0;
{$I-}
assign(f, fileName);
reset(f, 1);
if checkFails(IOResult = 0, 'Error opening file ' + fileName, true) then
exit;
i:= 0; // avoid compiler hints
s[0]:= #0;
repeat
BlockRead(f, s[1], 255 - Length(ss), i);
if i > 0 then
begin
s[0]:= char(i);
ss:= ss + s;
while (Length(ss) > 1)and(Length(ss) > byte(ss[1])) and allOK do
begin
ParseIPCCommand(copy(ss, 2, byte(ss[1])));
Delete(ss, 1, Succ(byte(ss[1])));
end
end
until (i = 0) or (not allOK);
close(f)
{$I+}
end;
procedure SendStat(sit: TStatInfoType; s: shortstring);
const stc: array [TStatInfoType] of char = ('r', 'D', 'k', 'K', 'H', 'T', 'P', 's', 'S', 'B', 'c', 'g', 'p', 'R', 'h');
var buf: shortstring;
begin
buf:= 'i' + stc[sit] + s;
SendIPCRaw(@buf[0], length(buf) + 1)
end;
function isSyncedCommand(c: char): boolean;
begin
case c of
'+', '#', 'L', 'l', 'R', 'r', 'U'
, 'u', 'D', 'd', 'Z', 'z', 'A', 'a'
, 'S', 'j', 'J', ',', 'c', 'N', 'p'
, 'P', 'w', 't', '1', '2', '3', '4'
, '5', 'f', 'g': isSyncedCommand:= true;
else
isSyncedCommand:= ((byte(c) >= 128) and (byte(c) <= 128 + cMaxSlotIndex))
end
end;
procedure flushBuffer();
begin
if IPCSock <> nil then
begin
SDLNet_TCP_Send(IPCSock, @sendBuffer.buf, sendBuffer.count);
flushDelayTicks:= 0;
sendBuffer.count:= 0
end
end;
procedure SendIPC(s: shortstring);
begin
if IPCSock <> nil then
begin
if s[0] > #251 then
s[0]:= #251;
SDLNet_Write16(GameTicks, @s[Succ(byte(s[0]))]);
AddFileLog('[IPC out] '+ sanitizeCharForLog(s[1]));
inc(s[0], 2);
if isSyncedCommand(s[1]) then
begin
if sendBuffer.count + byte(s[0]) >= cSendBufferSize then
flushBuffer();
Move(s, sendBuffer.buf[sendBuffer.count], byte(s[0]) + 1);
inc(sendBuffer.count, byte(s[0]) + 1);
if (s[1] = 'N') or (s[1] = '#') then
flushBuffer();
end else
SDLNet_TCP_Send(IPCSock, @s, Succ(byte(s[0])))
end
end;
procedure SendIPCRaw(p: pointer; len: Longword);
begin
if IPCSock <> nil then
begin
SDLNet_TCP_Send(IPCSock, p, len)
end
end;
procedure SendIPCXY(cmd: char; X, Y: LongInt);
var s: shortstring;
begin
s[0]:= #9;
s[1]:= cmd;
SDLNet_Write32(X, @s[2]);
SDLNet_Write32(Y, @s[6]);
SendIPC(s)
end;
procedure IPCWaitPongEvent;
begin
isPonged:= false;
repeat
IPCCheckSock;
SDL_Delay(1)
until isPonged or (not allOK)
end;
procedure SendIPCAndWaitReply(s: shortstring);
begin
SendIPC(s);
SendIPC(_S'?');
IPCWaitPongEvent
end;
procedure FlushMessages(Lag: Longword);
begin
inc(flushDelayTicks, Lag);
if (flushDelayTicks >= cSendEmptyPacketTime) then
begin
if sendBuffer.count = 0 then
SendIPC(_S'+');
flushBuffer()
end
end;
procedure NetGetNextCmd;
var tmpflag: boolean;
s: shortstring;
x32, y32: LongInt;
begin
tmpflag:= true;
while (headcmd <> nil)
and (tmpflag or (headcmd^.cmd = '#')) // '#' is the only cmd which can be sent within same tick after 'N'
and ((GameTicks = LongWord(hiTicks shl 16 + headcmd^.loTime))
or (headcmd^.cmd = 's') // for these commands time is not specified
or (headcmd^.cmd = 'h') // seems the hedgewars protocol does not allow remote synced commands
or (headcmd^.cmd = '#') // must be synced for saves to work
or (headcmd^.cmd = 'b')
or (headcmd^.cmd = 'F')
or (headcmd^.cmd = 'G')) do
begin
case headcmd^.cmd of
'+': ; // do nothing - it is just an empty packet
'#': begin
AddFileLog('hiTicks increment by remote message');
inc(hiTicks);
end;
'L': ParseCommand('+left', true);
'l': ParseCommand('-left', true);
'R': ParseCommand('+right', true);
'r': ParseCommand('-right', true);
'U': ParseCommand('+up', true);
'u': ParseCommand('-up', true);
'D': ParseCommand('+down', true);
'd': ParseCommand('-down', true);
'Z': ParseCommand('+precise', true);
'z': ParseCommand('-precise', true);
'A': ParseCommand('+attack', true);
'a': ParseCommand('-attack', true);
'S': ParseCommand('switch', true);
'j': ParseCommand('ljump', true);
'J': ParseCommand('hjump', true);
',': ParseCommand('skip', true);
'c': begin
s:= copy(headcmd^.str, 2, Pred(headcmd^.len));
ParseCommand('gencmd ' + s, true);
end;
's': ParseChatCommand('chatmsg ', headcmd^.str, 2);
'b': ParseChatCommand('chatmsg ' + #4, headcmd^.str, 2);
'F': ParseCommand('teamgone u' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true);
'G': ParseCommand('teamback u' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true);
'f': ParseCommand('teamgone s' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true);
'g': ParseCommand('teamback s' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true);
'N': begin
tmpflag:= false;
lastTurnChecksum:= SDLNet_Read32(@headcmd^.str[2]);
AddFileLog('got cmd "N": time '+IntToStr(hiTicks shl 16 + headcmd^.loTime))
end;
'p': begin
x32:= SDLNet_Read32(@(headcmd^.str[2]));
y32:= SDLNet_Read32(@(headcmd^.str[6]));
doPut(x32, y32, false)
end;
'P': begin
// these are equations solved for CursorPoint
// SDLNet_Read16(@(headcmd^.X)) == CursorPoint.X - WorldDx;
// SDLNet_Read16(@(headcmd^.Y)) == cScreenHeight - CursorPoint.Y - WorldDy;
if CurrentTeam^.ExtDriven then
begin
TargetCursorPoint.X:= LongInt(SDLNet_Read32(@(headcmd^.str[2]))) + WorldDx;
TargetCursorPoint.Y:= cScreenHeight - LongInt(SDLNet_Read32(@(headcmd^.str[6]))) - WorldDy;
if not bShowAmmoMenu and autoCameraOn then
CursorPoint:= TargetCursorPoint
end
end;
'w': ParseCommand('setweap ' + headcmd^.str[2], true);
't': ParseCommand('taunt ' + headcmd^.str[2], true);
'h': ParseCommand('hogsay ' + copy(headcmd^.str, 2, Pred(headcmd^.len)), true);
'1'..'5': ParseCommand('timer ' + headcmd^.cmd, true);
else
if (byte(headcmd^.cmd) >= 128) and (byte(headcmd^.cmd) <= 128 + cMaxSlotIndex) then
ParseCommand('slot ' + char(byte(headcmd^.cmd) - 79), true)
else
OutError('Unexpected protocol command: ' + headcmd^.cmd, True)
end;
RemoveCmd
end;
if (headcmd <> nil) and tmpflag and (not CurrentTeam^.hasGone) then
checkFails(GameTicks < LongWord(hiTicks shl 16) + headcmd^.loTime,
'oops, queue error. in buffer: ' + headcmd^.cmd +
' (' + IntToStr(GameTicks) + ' > ' +
IntToStr(hiTicks shl 16 + headcmd^.loTime) + ')',
true);
isInLag:= (headcmd = nil) and tmpflag and (not CurrentTeam^.hasGone);
if isInLag and fastUntilLag then
begin
ParseCommand('spectate 0', true);
fastUntilLag:= false
end;
end;
procedure chFatalError(var s: shortstring);
begin
SendIPC('E' + s);
// TODO: should we try to clean more stuff here?
SDL_Quit;
if IPCSock <> nil then
halt(HaltFatalError)
else
halt(HaltFatalErrorNoIPC);
end;
procedure doPut(putX, putY: LongInt; fromAI: boolean);
begin
if CheckNoTeamOrHH or isPaused then
exit;
bShowFinger:= false;
if (not CurrentTeam^.ExtDriven) and bShowAmmoMenu then
begin
bSelected:= true;
exit
end;
with CurrentHedgehog^.Gear^,
CurrentHedgehog^ do
if (State and gstChooseTarget) <> 0 then
if ((((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AttackInMove) <> 0) or ((State and gstMoving) = 0)) or ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AttackingPut) = 0)) then
begin
if (Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NoTargetAfter) <> 0 then
isCursorVisible:= false;
if not CurrentTeam^.ExtDriven then
begin
if fromAI then
begin
TargetPoint.X:= putX;
TargetPoint.Y:= putY
end
else
begin
TargetPoint.X:= CursorPoint.X - WorldDx;
TargetPoint.Y:= cScreenHeight - CursorPoint.Y - WorldDy;
end;
if (WorldEdge <> weBounce) and ((Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NoWrapTarget) = 0) then
TargetPoint.X:= CalcWorldWrap(TargetPoint.X, 0);
SendIPCXY('p', TargetPoint.X, TargetPoint.Y);
end
else
begin
if (Ammoz[CurAmmoType].Ammo.Propz and ammoprop_NoWrapTarget) = 0 then
TargetPoint.X:= CalcWorldWrap(TargetPoint.X, 0);
TargetPoint.X:= putX;
TargetPoint.Y:= putY
end;
AddFileLog('put: ' + inttostr(TargetPoint.X) + ', ' + inttostr(TargetPoint.Y));
State:= State and (not gstChooseTarget);
if (Ammoz[CurAmmoType].Ammo.Propz and ammoprop_AttackingPut) <> 0 then
Message:= Message or (gmAttack and InputMask);
Message:= Message and (not (gmHJump or gmLJump or gmLeft or gmRight or gmUp or gmDown));
end
else
PlaySound(sndDenied)
else
if CurrentTeam^.ExtDriven then
OutError('Got /put while not being in choose target mode', false)
end;
procedure initModule;
begin
RegisterVariable('fatal', @chFatalError, true );
IPCSock:= nil;
fds:= nil;
headcmd:= nil;
lastcmd:= nil;
isPonged:= false;
SocketString:= '';
hiTicks:= 0;
flushDelayTicks:= 0;
sendBuffer.count:= 0;
end;
procedure freeModule;
begin
while headcmd <> nil do RemoveCmd;
SDLNet_FreeSocketSet(fds);
SDLNet_TCP_Close(IPCSock);
SDLNet_Quit();
end;
end.