How to capture AutoIt UDP traffic with Wireshark?

[TeraBit 0]

How to capture AutoIt UDP/TCP traffic with Wireshark?

Autoit is using http over udp or binary data send over udp?

how to make communication using udp and http standarts? Should I use tcp?

[water 1,847]

What AutoIt sends depends on your script. Can you show what you have so far?

[TeraBit 0]

I used RawCap to capture loopback interface. I have found out that AutoIt UPD uses binary to deliver data. Is this right? Also for some strange reason while opened dump file in Wireshark - it pointed out that there are errors in UDP geader checksum. WHY?

PrintScreen :

[water 1,847]

Once again. Can you post the code of the script which uses UDP?

[TeraBit 0]

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#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ButtonConstants.au3>
HotKeySet("{esc}", "Cleanup")
HotKeySet("{enter}", "sendData")
Global $ConnectedSocket = -1
Global $MainSocket
Local $g_IP, $RogueSocket, $GOOEY, $edit, $input, $butt, $msg
Local $ret, $recv
$g_IP = "127.0.0.1"
$_INCOMING_FLAG = "UDP DATA: "
OnAutoItExitRegister ("Cleanup")

; 1. UDP Listener ### Start The UDP Services ###
;==============================================
UDPStartup()
OnAutoItExitRegister ("Cleanup")
; 1. UDP Listener ### Create a Listening "SOCKET"
;==============================================
$socket = UDPBind($g_IP, 65432)
If @error <> 0 Then Exit
; 3. GUI ### Create a GUI for chatting
;==============================================
$GOOEY = GUICreate("P2P Chat", 300, 200)
$edit = GUICtrlCreateEdit("", 10, 40, 280, 150, $WS_DISABLED)
$input = GUICtrlCreateInput("", 10, 10, 200, 20)
$butt = GUICtrlCreateButton("Send", 210, 10, 80, 20, $BS_DEFPUSHBUTTON)
GUISetState()
; GUI Message Loop
;==============================================
While 1
$msg = GUIGetMsg()
If $msg = $GUI_EVENT_CLOSE Then ExitLoop
If $msg = $butt Then sendData()
$data = UDPRecv($socket, 200)
If $data <> "" Then
  GUICtrlSetData($edit, GUICtrlRead($edit) & $_INCOMING_FLAG &$data & @CRLF)
EndIf
;~  Sleep(50)

WEnd
GUIDelete($GOOEY)
Func sendData()
If $socket <> 0 Then
  $status = UDPSend($socket, GUICtrlRead($input))
  If $status = 0 Then
   MsgBox(0, "ERROR", "Error while sending UDP message: " & @error)
   Exit
  EndIf
 
ElseIf $ret > 0 Then
  ; UPDATE EDIT CONTROL WITH DATA WE SENT
  ;----------------------------------------------------------------
  GUICtrlSetData($edit, GUICtrlRead($edit) & GUICtrlRead($input) & @CRLF)
  GUICtrlSetData($input, "")
EndIf
EndFunc   ;==>sendData

Func Lookup()
; If no connection look for one
Return 0
EndFunc   ;==>Lookup
Func Cleanup()
UDPCloseSocket($socket)
UDPShutdown()
EndFunc   ;==>Cleanup

[jvanegmond 297]

Your RawCap is broken or something. AutoIt does not even control the checksum part of the UDP message, Windows does that. This checksum would never be 0x0000.

So what's your real question? HTTP over UDP? Writing HTTP packets is easy, trivial. Here's some sample code, but it's on the wrong end of the spectrum.