Re: TServerSocket sends a unwanted acknowlege

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#3475

From: Billy Holliday
Date: Wed, 21 Sep 2005 11:39

44 lines
2406 bytes

Hi Hans.



> > next time i get a socket error 4 : the windows pc (TServerSocket) has
made
> > a push, with a wrong sequence-number. (why??)
>
> Socket error 4 ? Where ? Does the client display that ? Never
> saw a TServerSocket with that error number.
>

I see it on a debug memo and in the protokoll analyser.


void __fastcall TForm::ServerSocketClientError( TObject *Sender,
TCustomWinSocket *Socket, TErrorEvent ErrorEvent, int &ErrorCode )
{
   Memo1->Lines->Add("Socket-Error at Port:" + IntToStr( Socket->RemotePort)
+ " Nr.: "+  IntToStr( (int) (ErrorEvent))    );
   ErrorCode= 0;
}


The TCP/IP-Stack is sending a automatic generated ACK ( 0 bytes data) as
reponse to the last client message.
Then the TServerSocket is sending  the really response (5 seconds later).
But he is doing this with:
the same sequence number,
the same ack number,
the same win number.

The client makes a correct response, but the TServerSocket rises a
Clienterror, because the sequence number is wrong.

Perhaps i should try the INDY TCP componente, but i don't know, how to get
the lenght of the received data message

:-(

So i don't know, how long is the message......


Thanks.

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Subject: Re: TServerSocket sends a unwanted acknowlege
Date: Wed, 21 Sep 2005 13:39:22 +0200
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