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unit UNetworkClient;
interface
uses
Classes, SysUtils{$IFDEF UNIX}, fpAsync, fpsock{$ENDIF}, Protocol;
{$IFDEF UNIX}
type
{ TTCPClientThread }
TTCPClientThread = class(TThread)
TCPClient: TTCPClient;
procedure Execute; override;
end;
{ TNetworkClient }
TNetworkClient = class
private
DataAvailableHandle: Pointer;
TCPClientThread: TTCPClientThread;
ReceiveBuffer: TMemoryStream;
procedure DataAvailableExecute(Sender: TObject);
procedure ConnectionStateChangeExecute(Sender: TClientConnectionSocket;
OldState, NewState: TConnectionState);
procedure DataAvailableSync;
public
AuxServer: TServerCall;
LocalClient: TClientCall;
TCPClient: TTCPClient;
ClientEventLoop: TEventLoop;
function Server(Command: TCommand; Player, Subject: Integer; var Data): Integer;
constructor Create;
destructor Destroy; override;
end;
var
NetworkClient: TNetworkClient;
{$ENDIF}
procedure Client(Command, Player: Integer; var Data); stdcall;
implementation
uses
LocalPlayer{$IFDEF UNIX}, Global, UNetworkCommon{$ENDIF};
procedure Client(Command, Player: Integer; var Data);
{$IFDEF UNIX}
var
Cmd: TCommand;
{$ENDIF}
begin
{$IFDEF UNIX}
Cmd := TCommand(Command);
case Cmd of
cmInitModule: begin
if not Assigned(NetworkClient) then
NetworkClient := TNetworkClient.Create;
NetworkClient.AuxServer := TInitModuleData(Data).Server;
TInitModuleData(Data).Flags := aiThreaded;
NetworkClient.LocalClient := LocalPlayer.Client;
end;
cmReleaseModule: begin
FreeAndNil(NetworkClient);
end;
end;
{$ENDIF}
end;
{$IFDEF UNIX}
function LocalServer(Command, Player, Subject: Integer; var Data): Integer; stdcall;
begin
if Assigned(NetworkClient) then
Result := NetworkClient.Server(TCommand(Command), Player, Subject, Data)
else
Result := 0; // Arbitrary
end;
{ TTCPClientThread }
procedure TTCPClientThread.Execute;
begin
TCPClient.EventLoop.Run;
end;
{ TNetworkClient }
procedure TNetworkClient.DataAvailableExecute(Sender: TObject);
begin
TCPClientThread.Synchronize(TCPClientThread, DataAvailableSync);
ClientEventLoop.ClearDataAvailableNotify(DataAvailableHandle);
DataAvailableHandle := ClientEventLoop.SetDataAvailableNotify(TCPClient.Stream.Handle, DataAvailableExecute, nil);
end;
procedure TNetworkClient.ConnectionStateChangeExecute(
Sender: TClientConnectionSocket; OldState, NewState: TConnectionState);
begin
if NewState = connConnected then
DataAvailableHandle := ClientEventLoop.SetDataAvailableNotify(TCPClient.Stream.Handle, DataAvailableExecute, nil);
end;
procedure TNetworkClient.DataAvailableSync;
var
Command: Integer;
ReadCount: Integer;
Player: Integer;
Data: array of Byte;
begin
StreamAppend(ReceiveBuffer, TCPClient.Stream);
while ReceiveBuffer.Size >= 2 * SizeOf(Integer) do begin
ReceiveBuffer.Position := 0;
Command := Integer(ReceiveBuffer.ReadDWord);
Player := Integer(ReceiveBuffer.ReadDWord);
SetLength(Data, GetCommandDataSize(TCommand(Command)));
if Length(Data) > 0 then begin
ReadCount := ReceiveBuffer.Read(Data[0], Length(Data));
SetLength(Data, ReadCount);
end;
// Rewrite server address received from network by local handler
if Command = cInitModule then begin
PInitModuleData(@Data[0])^.Server := LocalServer;
end;
if Length(Data) > 0 then
LocalClient(Command, Player, Data[0])
else LocalClient(Command, Player, nil^);
StreamRemoveRead(ReceiveBuffer);
end;
end;
function TNetworkClient.Server(Command: TCommand; Player, Subject: Integer;
var Data): Integer;
begin
with TCPClient.Stream do begin
WriteDWord(DWord(Command));
WriteDWord(Player);
WriteDWord(Subject);
if GetCommandDataSize(Command) > 0 then
Write(Data, GetCommandDataSize(Command));
Result := ReadDWord;
end;
end;
constructor TNetworkClient.Create;
begin
ReceiveBuffer := TMemoryStream.Create;
ClientEventLoop := TEventLoop.Create;
TCPClient := TTCPClient.Create(nil);
with TCPClient do begin
EventLoop := ClientEventLoop;
Host := '127.0.0.1';
Port := CevoNetworkPort;
OnConnectionStateChange := ConnectionStateChangeExecute;
Active := True;
end;
TCPClientThread := TTCPClientThread.Create(True);
TCPClientThread.TCPClient := TCPClient;
TCPClientThread.Start;
end;
destructor TNetworkClient.Destroy;
begin
ClientEventLoop.Break;
FreeAndNil(TCPClientThread);
FreeAndNil(TCPClient);
FreeAndNil(ClientEventLoop);
FreeAndNil(ReceiveBuffer);
inherited;
end;
{$ENDIF}
end.
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