TCP

[tsolrm]

Hi guys

I want to make a server that's running constantly and receiving messages from different clients.

So far i've managed to do it with a simple message from a local client. How can i make it receive messages from any IP, not just local ones?

==server==

TCPStartup()
$TCPListen = TCPListen (@IPAddress1, 403)

Do 
$TCPAccept = TCPAccept($TCPListen)
Until $TCPAccept <> -1

Do
$TCPRec = TCPRecv ($TCPAccept, 1000000)
Until $TCPRec <> -1

MsgBox (0, "test", $TCPRec)

==client==

TCPStartup ()
$TCPConnect = TCPConnect (@IPAddress1, 403)
If $TCPConnect = -1 then 
MsgBox (0, "no", "no connection")
Exit
EndIf
TCPSend($TCPConnect, "HELLO")

Edited December 9, 2011 by tsolrm

[water]

I don't see you script limit the IP-addresses it accepts pakets from. Might be your firewall doesn't allow incoming connections.

[Akarillon]

If you move the client to another computer, do you change the ip-adress in the klient script?

$TCPConnect = TCPConnect (@IPAddress1, 403)

It needs to be changed to the ip-adress of the computer where the server is running.

If you do, then check firewall as water said.

[tsolrm]

I have checked the firewall and made sure the port 403 is open.

However when i'm trying to run it (at least on the same PC) its not working.

[water]

What's missing in your scripts is error checking! Every AutoIt function returns a value or sets @error to show that an error occurred. So please check @error after each TCP function call and post what you get.

[tsolrm]

It's given me an error 10061

I've googled it WSAECONNREFUSED 10061

Connection refused.

No connection could be made because the target computer actively refused it. This usually results from trying to connect to a service that is inactive on the foreign host—that is, one with no server application running.

Edited December 9, 2011 by tsolrm

[water]

Do you have any kind of "protection" software installed on the client or server PC? Like virus scanner, HIPS etc. It might not only be the firewall that refuses the connection. Did you check the firewall on both PC's?

[tsolrm]

I'm running it on the same PC.

[water]

But from your first post I got the impression that the code there was working fine on a single PC.

I tested your client/server code and it worked fine.

[tsolrm]

no but i tried it like this

==client==

$myip = "here's my IP"

TCPStartup ()

$TCPConnect = TCPConnect ($myip, 403)

If $TCPConnect = -1 then

MsgBox (0, "no", "no connection")

Exit

EndIf

TCPSend($TCPConnect, "HELLO")

and it doesn't connect

[water]

Could you please restart your PC to make sure that no server/client code is haning around?

What do you get if you run the following version with more error checking?

$myip = "here's my IP"
TCPStartup ()
msgBox(16, "Info", "TCPStartup: " & @error)
$TCPConnect = TCPConnect ($myip, 403)
If @error <> 0 then
  MsgBox (0, "no", "no connection. Error: " & @error)
  Exit
EndIf
TCPSend($TCPConnect, "HELLO")
MsgBox (16, "Info", "TCPSend: " & @error)

[tsolrm]

TCPStartup: 0

and

no connection. Error: 10061

[water]

Just to make sure. The server part (as posted at the beginning) is successfully running?

[tsolrm]

Yes this code is running

==server==

TCPStartup()
$TCPListen = TCPListen (@IPAddress1, 403)

Do
$TCPAccept = TCPAccept($TCPListen)
Until $TCPAccept <> -1

Do
$TCPRec = TCPRecv ($TCPAccept, 1000000)
Until $TCPRec <> -1

MsgBox (0, "test", $TCPRec)

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tsolrm
            
            
                Posted December 9, 2011
                
            
        
    
    
        


tsolrm
            
        
        
            
                
                    


    
        
    

                    
                    
                        

                    
                
            
            
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           Posted December 9, 2011
           
            
            
                
                
            
        
    

    

    

    
        
        
            I don't know, i've tried switching off the firewall completely and the antivirus too!


            
        

        

        
    

    
    

    

                    
                    
                        
                    
                    
                

                    

                    
                    






    

    

    
        
            
                


    
        
    

                
                
                    
                        

                    
                
            
        
        
            
                


water
            
            
                Posted December 9, 2011
                
            
        
    
    
        


water
            
        
        
            
                
                    


    
        
    

                    
                    
                        

                    
                
            
            
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           Posted December 9, 2011
           
            
            
                
                
            
        
    

    

    

    
        
        
            I modified the scripts a bit so they now write to a log file:
Server:
#include <file.au3>
$iResult = TCPStartup()
_FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPStartup return value: " & $iResult & ", @error: " & @error)
$TCPListen = TCPListen(@IPAddress1, 403)
_FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPListen return value: " & $TCPListen & ", @error: " & @error)
Do
    $TCPAccept = TCPAccept($TCPListen)
Until $TCPAccept <> -1

Do
    $TCPRec = TCPRecv($TCPAccept, 1000000)
    _FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPRecv return value: " & $TCPRec & ", @error: " & @error)
Until $TCPRec <> -1

MsgBox(0, "test", $TCPRec)

Client:

#include <file.au3>
$iResult = TCPStartup()
_FileWriteLog("C:\temp\TCP.log", "TCP Client - TCPStartup return value: " & $iResult & ", @error: " & @error & @LF)
$TCPConnect = TCPConnect(@IPAddress1, 403)
_FileWriteLog("C:\temp\TCP.log", "TCP Client - TCPConnect return value: " & $TCPConnect & ", @error: " & @error)
If $TCPConnect = -1 Then
    MsgBox(0, "no", "no connection")
    Exit
EndIf
$iResult = TCPSend($TCPConnect, "HELLO")
_FileWriteLog("C:\temp\TCP.log", "TCP Client - TCPSend return value: " & $iResult & ", @error: " & @error)

Compile the scripts, start server.exe and then client.exe and post the log file c:\temp\tcp.log

[tsolrm]

2011-12-09 17:09:31 : TCP Server - TCPStartup return value: True, @error: 0

2011-12-09 17:09:31 : TCP Server - TCPListen return value: 608, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPStartup return value: True, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPConnect return value: 608, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPSend return value: 5, @error: 0

[tsolrm]

Anyone? I thought this is simple enough!

Server is on my PC

And the client is someplace else and is sending me a simple message using my IP address. But for some reason there is no connection

[tsolrm]

$TCPConnect = TCPConnect ("my ip", 1111)

sleep (5000)

After I've put sleep there, it returns $TCPConnect as -1 but @error as 0! What does that mean?

[water]

2011-12-09 17:09:31 : TCP Server - TCPStartup return value: True, @error: 0

2011-12-09 17:09:31 : TCP Server - TCPListen return value: 608, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPStartup return value: True, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPConnect return value: 608, @error: 0

2011-12-09 17:09:34 : TCP Client - TCPSend return value: 5, @error: 0

The logfile shows that everything worked fine on the client side. Returnvalue 5 for TCPSend means: 5 bytes sent.

On the server side there seems to be a problem with TCPAccept (because the TCPRecv message never shows up). Could you please change the server code and repeat the test:

#include <file.au3>
$iResult = TCPStartup()
_FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPStartup return value: " & $iResult & ", @error: " & @error)
$TCPListen = TCPListen(@IPAddress1, 403)
_FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPListen return value: " & $TCPListen & ", @error: " & @error)
Do
    $TCPAccept = TCPAccept($TCPListen)
    _FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPAccept return value: " & $TCPAccept & ", @error: " & @error)
Until $TCPAccept <> -1

Do
    $TCPRec = TCPRecv($TCPAccept, 1000000)
    _FileWriteLog("C:\temp\TCP.log", "TCP Server - TCPRecv return value: " & $TCPRec & ", @error: " & @error)
Until $TCPRec <> -1

MsgBox(0, "test", $TCPRec)