The problem is that every time the client closes the TCP connection,
the  winsock in the server changes the listening port. Is there any way
of keeping the listening port constant so that the client always
connects on the same port?

I have tried to set the winsock LocalPort property to a fixed port e.g.
2749 but when i do this the client fails to connect again after the
first successful connect. I get an error message saying that the winsock
is in the wrong state.

Thanks for your help.

--
Regards,
Mikkel H. Andersen

Private Sub Winsock1_Close()
If Winsock1.State <> 0 Then Winsock1.Close
End Sub

Isaac

On Fri, 22 Oct 1999 10:40:32 +0100, Shamji Patel

I have tried to set the winsock LocalPort property to a fixed port e.g.
2749 but when i do this the client fails to connect again after the
first successful connect. I get an error message saying that the winsock
is in the wrong state.

After you close your winsock connection, LocalPort changes (if I remember
correctly), so you need to reset it before listening again...(otherwise its
pretty darn random - check it with a debug.print statement)

'Server Side

Private Sub Form_Load()
    ServerIPInfoBox.Text = ServerSock.LocalIP
    ServerConnectFromBox.Text = "Waiting"
    ServerSock.LocalPort = 29
    ServerSock.Listen
End Sub

This also required me to include a reset button on the server, my
implementation kinda goes against CW here...

Private Sub cmdServerReset_Click()
    ServerSock.Close
    ServerSock.LocalPort = 29
    ServerSock.Listen
End Sub

Private Sub ServerSock_Close()
    cmdServerReset_Click
End Sub

The client should be able to connect every time to port 29 (telnet port?)

Depending on the design of your Client/Server, the server should be
able to open the reset the port to listen mode after a connection. Or
better, revise your SERVER programs to accept multiple connection.  
Here are the steps

SERVER
Initialization:
1.  Create a new socket and select a port to listen to.
2.  Wait for a connect event.

When connection is detected:
1.  Create a new socket and accept the connection.
2.  Proceed with CLIENT/SERVER conversation.

The above example is the ideal client/server setup.  Which means, the
port where the SERVER is listening is NEVER closed, and all
connections to it is ACCEPTED in a different port.

Hope this helps,

Rey Arson II
Sistema Pilipinas MCMXCIII
Arson Engineering 2000

iQA/AwUBOBmtO0kQgOtuDKxxEQJgIwCguZcriLNIpBU5N/Z+FGVvz2E0zoAAoIBt
iuxXIlPgF8Kb4BvseHgclhXd
=/eJU
-----END PGP SIGNATURE-----

 Sent via Deja.com http://www.deja.com/
 Before you buy.