UDPSend

[AndroidZero]

I want to check if the message from UDPsend() arrived at the goal IPAddr.

The standard @error messages just tell me:

-1, -2 or -3 invalid socketarray.
1 - IPAddr is incorrect.
2 - port is incorrect.

But I want to know if the IPAddr was reachable.

I think _WinAPI_ could be usefull but I don't know what function I need.

Here a shortcut of my script:

#include <WinAPIDiag.au3>

; =================================================
; Topic.......: UDP StartUp :......................
Global $socketPort = 1927
UDPStartUp()
$udpSocket = UDPBind(@IPAddress1, $socketPort)
$starttime = TimerInit()
; =================================================

_UDP_Send_alive()

Func _UDP_Send_alive()
$socket = UDPOpen("10.46.229.220", 1927, 1)
$send = UDPSend($socket, "Test")
$error_classic = @error
$error_winAPI = _WinAPI_GetErrorMessage($send,)
ConsoleWrite($error_winAPI & @CRLF & $error_classic & @Crlf)
EndFunc

[JohnOne]

As I understand it, the whole point of UDP is sending without verification and is not guaranteed to reach destination.

TCP is guaranteed.

UDPSend will return 0 if nothing is sent though.

Use Ping function to test if dest is reachable.

[AndroidZero]

Hello JohnOne,

Thank your for your quick reply !

In the reference of UDPSend is mentioned "windows API WSAGetError return value (see MSDN)."

So I thought that on some way it is possible to get more error informations with _WinAPI_.

But if not then not...

[JohnOne]

I'm not 100% certain UDPSend even uses sockets, a code dev would know better.

But if it were then I think as indicated in the link you provided, WSAGetLastError() might be the function to use.

I believe it resides in Ws2_32.dll.

[AndroidZero]

Ping is exactly what I needed thank you !

Sometimes the easiest solutions are the best.

[JohnOne]

Ace.