Delphi Indy TCP-Verbindung zu RECON

Question

Ich versuche, herauszufinden, wie möglich wäre, eine Verbindung und Authentifizierung mit der Remote-Konsole stablished zu bekommen.

Dieses Wiki Wiki 1 und dieses Wiki 2 mir sagen, ich brauche ein Paket zu bauen und an die RECON zu schicken, aber ich weiß nicht, wie dies zu tun ..

Ich bin ein Neuling mit Vernetzung, aber da ich dies wurde dort dann die Suche bauen I:

procedure TForm1.Button1Click(Sender: TObject); 
begin 
    IdTCPClient1.Host:= '127.0.0.1'; 
    IdTCPClient1.Port:= 20001; 
    IdTCPClient1.Connect; 
    IdTcpClient1.IOHandler.Writeln('1234'); 
    ShowMessage(IdTcpClient1.IOHandler.ReadLn); 
end; 

ich bin stucked dort, wo 1234 die RECON Passwort und die Nachricht, die sie zurückkehren: Verbindung anmutig geschlossen ...

und schließlich: wie kann ich mich einloggen in erfolgreich? Und zumindest senden Sie einen Befehl "Liste" der nächste Schritt wäre das Konsolenprotokoll in Echtzeit erhalten?

Dank

Answer 1

Ihr Code wird die Source RECON protocol nicht implementieren, die Minecraft auf der Startbefehle. Sie können nicht nur beliebige Daten an den Server senden, es muss korrekt gerahmt werden.

etwas ähnlich stattdessen versuchen:

const 
    SERVERDATA_AUTH = 3; 
    SERVERDATA_AUTH_RESPONSE = 2; 
    SERVERDATA_EXECCOMMAND = 2; 
    SERVERDATA_RESPONSE_VALUE = 0; 

procedure TForm1.Button1Click(Sender: TObject); 
begin 
    IdTCPClient1.Host := '127.0.0.1'; 
    IdTCPClient1.Port := 20001; 
    IdTCPClient1.Connect; 
    SendRECONLogin('1234'); 
end; 

procedure TForm1.Button2Click(Sender: TObject); 
begin 
    IdTCPClient1.Disconnect; 
end; 

procedure TForm1.Button3Click(Sender: TObject); 
begin 
    SendRECONCommand('list'); 
end; 

procedure TForm1.IdTCPClient1Connect(Sender: TObject); 
begin 
    Timer1.Enabled := True; 
end; 

procedure TForm1.IdTCPClient1Disconnect(Sender: TObject); 
begin 
    Timer1.Enabled := False; 
end; 

procedure TForm1.Timer1Timer(Sender: TObject); 
var 
    RespID: Int32; 
    PktType: Int32; 
    Payload: string; 
begin 
    try 
    if not IdTCPClient1.Connected then 
     Exit; 

    if IdTCPClient1.IOHandler.InputBufferIsEmpty then 
    begin 
     IdTCPClient1.IOHandler.CheckForDataOnSource(0); 
     IdTCPClient1.IOHandler.CheckForDisconnect(True, False); 
     if IdTCPClient1.IOHandler.InputBufferIsEmpty then Exit; 
    end; 

    RespID := ReadRECONPacket(PktType, Payload); 
    case PktType of 
     SERVERDATA_AUTH_RESPONSE: begin 
     if RespID = -1 then begin 
      // authentication failed... 
      IdTCPClient1.Disconnect; 
     end else begin 
      // authentication successful... 
     end; 
     end; 
     SERVERDATA_RESPONSE_VALUE: begin 
     // match RespID to previously sent ReqID 
     // and handle Payload as needed... 
     end; 
    end; 
    except 
    IdTCPClient1.Disconnect; 
    end; 
end; 

var 
    gReqID: Int32 = 0; 

function TForm1.SendRECONPacket(PktType: Int32; const Payload: string = ''): Int32; 
var 
    Bytes: TIdBytes; 
begin 
    Bytes := IndyTextEncoding_ASCII.GetBytes(Payload); 
    try 
    if gReqID < MaxInt then Inc(gReqID) 
    else gReqID := 1; 
    Result := gReqID; 

    IdTCPClient1.IOHandler.WriteBufferOpen; 
    try 
     IdTCPClient1.IOHandler.Write(Int32(Length(Bytes)+10), False); 
     IdTCPClient1.IOHandler.Write(Result, False); 
     IdTCPClient1.IOHandler.Write(PktType, False); 
     IdTCPClient1.IOHandler.Write(Bytes); 
     IdTCPClient1.IOHandler.Write(UInt16(0), False); 
     IdTCPClient1.IOHandler.WriteBufferClose; 
    except 
     IdTCPClient1.IOHandler.WriteBufferCancel; 
     raise; 
    end; 
    except 
    IdTCPClient1.Disconnect; 
    raise; 
    end;  
end; 

function TForm1.SendRECONLogin(const Password: String): Int32; 
begin 
    Result := SendRECONPacket(SERVERDATA_AUTH, Password); 
end; 

function TForm1.SendRECONCommand(const Cmd: String): Int32; 
begin 
    Result := SendRECONPacket(SERVERDATA_EXECCOMMAND, Cmd); 
end; 

function TForm1.ReadRECONPacket(var PktType: Integer; var Payload: String): Int32; 
var 
    Len: Int32; 
begin 
    try 
    Len  := IdTCPClient1.IOHandler.ReadInt32(False); 
    Result := IdTCPClient1.IOHandler.ReadInt32(False); 
    PktType := IdTCPClient1.IOHandler.ReadInt32(False); 
    Payload := IdTCPClient1.IOHandler.ReadString(Len-10, IndyTextEncoding_ASCII); 
    IdTCPClient1.IOHandler.Discard(2); 
    except 
    IdTCPClient1.Disconnect; 
    raise; 
    end; 
end; 

Beachten Sie, dass RCON ein asynchrones Protokoll ist. Jeder Befehl enthält eine Anforderungs-ID, die in der Antwort zurückgemeldet wird. Mehrere Befehle können an den Server gesendet werden, ohne auf ihre Antworten zu warten. Deshalb habe ich SendRCONPacket() geschrieben, um die tatsächlich verwendete Anforderungs-ID zurückzugeben, sodass Sie sie irgendwo speichern und mit der von ReadRCONPacket() zurückgegebenen Antwort-ID abgleichen können. Die Verwendung eines TTimer in dem obigen Code ist nur ein Beispiel wie unaufgeforderte Daten vom Server zu empfangen. Im Produktionscode würde ich vorschlagen, einen dedizierten Lese-Thread anstelle eines Timers zu verwenden und den Thread den Rest des Codes benachrichtigen zu lassen, sobald ein Paket eintrifft.

Wenn Sie planen, nicht auf immer mit mehreren Befehlen parallel verarbeitet werden, dann könnte man ganz von dem Timer loszuwerden und etwas tun, wie folgt statt:

const 
    SERVERDATA_AUTH = 3; 
    SERVERDATA_AUTH_RESPONSE = 2; 
    SERVERDATA_EXECCOMMAND = 2; 
    SERVERDATA_RESPONSE_VALUE = 0; 

procedure TForm1.Button1Click(Sender: TObject); 
var 
    Reply: string; 
begin 
    IdTCPClient1.Host := '127.0.0.1'; 
    IdTCPClient1.Port := 20001; 
    IdTCPClient1.Connect; 
    SendRECONLogin('1234'); 
    ShowMessage('Conectado exitosamente'); 
    Reply := SendRECONCommand('say Hello'); 
    // use Reply as needed... 
    ShowMessage(Reply); 
end; 

procedure TForm1.Button2Click(Sender: TObject); 
begin 
    IdTCPClient1.Disconnect; 
end; 

procedure TForm1.Button3Click(Sender: TObject); 
var 
    Reply: string; 
begin 
    Reply := SendRECONCommand('list'); 
    // use Reply as needed... 
    ShowMessage(Reply); 
end; 

var 
    gReqID: Int32 = 0; 

function TForm1.SendRECONPacket(PktType: Int32; const Payload: string = ''): Int32; 
var 
    Bytes: TIdBytes; 
begin 
    Bytes := IndyTextEncoding_ASCII.GetBytes(Payload); 
    try 
    if gReqID < MaxInt then Inc(gReqID) 
    else gReqID := 1; 
    Result := gReqID; 

    IdTCPClient1.IOHandler.WriteBufferOpen; 
    try 
     IdTCPClient1.IOHandler.Write(Int32(Length(Bytes)+10), False); 
     IdTCPClient1.IOHandler.Write(Result, False); 
     IdTCPClient1.IOHandler.Write(PktType, False); 
     IdTCPClient1.IOHandler.Write(Bytes); 
     IdTCPClient1.IOHandler.Write(UInt16(0), False); 
     IdTCPClient1.IOHandler.WriteBufferClose; 
    except 
     IdTCPClient1.IOHandler.WriteBufferCancel; 
     raise; 
    end; 
    except 
    IdTCPClient1.Disconnect; 
    raise; 
    end; 
end; 

procedure TForm1.SendRECONLogin(const Password: String); 
var 
    ReqID, RespID, PktType: Int32; 
    Reply: String; 
begin 
    { 
    From https://developer.valvesoftware.com/wiki/Source_RCON_Protocol#SERVERDATA_AUTH_RESPONSE: 

    When the server receives an auth request, it will respond with an empty SERVERDATA_RESPONSE_VALUE, 
    followed immediately by a SERVERDATA_AUTH_RESPONSE indicating whether authentication succeeded or 
    failed. Note that the status code is returned in the packet id field, so when pairing the response with the 
    original auth request, you may need to look at the packet id of the preceeding SERVERDATA_RESPONSE_VALUE. 
    } 

    // in testing, there is no empty SERVERDATA_RESPONSE_VALUE sent before SERVERDATA_AUTH_RESPONSE! 

    ReqID := SendRECONPacket(SERVERDATA_AUTH, Password); 

    RespID := ReadRECONPacket(PktType, Reply); 
    if PktType = SERVERDATA_RESPONSE_VALUE then 
    begin 
    if RespID <> ReqID then 
     raise Exception.Create('Received unexpected packet'); 
    RespID := ReadRECONPacket(PktType, Reply); 
    end; 

    if PktType <> SERVERDATA_AUTH_RESPONSE then 
    raise Exception.Create('Received unexpected packet'); 

    if RespID <> ReqID then 
    begin 
    if RespID <> -1 then 
     raise Exception.Create('Received unexpected packet'); 
    raise Exception.Create('Authentication failed'); 
    end; 
end; 

function TForm1.SendRECONCommand(const Cmd: String): string; 
var 
    ReqID, TermReqID, RespID, PktType: Int32; 
    Reply: string; 
begin 
    { 
    From https://developer.valvesoftware.com/wiki/Source_RCON_Protocol#Multiple-packet_Responses: 

    Most responses are small enough to fit within the maximum possible packet size of 4096 bytes. 
    However, a few commands such as cvarlist and, occasionally, status produce responses too 
    long to be sent in one response packet. When this happens, the server will split the response 
    into multiple SERVERDATA_RESPONSE_VALUE packets. Unfortunately, it can be difficult to 
    accurately determine from the first packet alone whether the response has been split. 

    One common workaround is for the client to send an empty SERVERDATA_RESPONSE_VALUE 
    packet after every SERVERDATA_EXECCOMMAND request. Rather than throwing out the 
    erroneous request, SRCDS mirrors it back to the client, followed by another RESPONSE_VALUE 
    packet containing 0x0000 0001 0000 0000 in the packet body field. Because SRCDS always 
    responds to requests in the order it receives them, receiving a response packet with an empty 
    packet body guarantees that all of the meaningful response packets have already been received. 
    Then, the response bodies can simply be concatenated to build the full response. 
    } 

    // in testing, there is no mirrored SERVERDATA_RESPONSE_VALUE! The sent SERVERDATA_RESPONSE_VALUE 
    // is responded with a single SERVERDATA_RESPONSE_VALUE that says 'Unknown request' in its payload! 

    ReqID := SendRECONPacket(SERVERDATA_EXECCOMMAND, Cmd); 
    TermReqID := SendRECONPacket(SERVERDATA_RESPONSE_VALUE, ''); 

    repeat 
    RespID := ReadRECONPacket(PktType, Reply); 
    if PktType <> SERVERDATA_RESPONSE_VALUE then 
     raise Exception.Create('Received unexpected packet'); 

    if RespID <> ReqID then 
    begin 
     if RespID <> TermReqID then 
     raise Exception.Create('Received unexpected packet'); 

     { 
     RespID := ReadRECONPacket(PktType, Reply); 
     if (PktType <> SERVERDATA_RESPONSE_VALUE) or (RespID <> TermReqID) then 
     raise Exception.Create('Received unexpected packet'); 
     } 

     Break; 
    end; 

    Result := Result + Reply; 
    until False; 
end; 

function TForm1.ReadRECONPacket(var PktType: Integer; var Payload: String): Int32; 
var 
    Len: Int32; 
begin 
    try 
    Len := IdTCPClient1.IOHandler.ReadInt32(False); 
    Result := IdTCPClient1.IOHandler.ReadInt32(False); 
    PktType := IdTCPClient1.IOHandler.ReadInt32(False); 
    Payload := IdTCPClient1.IOHandler.ReadString(Len-10, IndyTextEncoding_ASCII); 
    IdTCPClient1.IOHandler.Discard(2); 
    except 
    IdTCPClient1.Disconnect; 
    raise; 
    end; 
end;