Error while getting Hostname from IP

[Ebola57]

Hi community

I got an error, while runing this code

#include <Inet.au3>
#include <MsgBoxConstants.au3>

Local $aResult, $sResult, $sIp

TCPStartup()
$sIp = TCPNameToIP("MyHostname.fr")
$sResult = _TCPIpToName($sIp)
If @error Then
    MsgBox($MB_SYSTEMMODAL, "_TCPIpToName()", "@error = " & @error & @CRLF & "@extended = " & @extended)
Else
    MsgBox($MB_SYSTEMMODAL, "MyHostname.fr really is: ", $sResult)
EndIf

$sIp contains the expected IP but IP to Name leads me to error

@error = 4

@extended = 0

I am runing this script on Win10, ws2_32.dll exists in C:\Windows\System32

Also read @MS : https://docs.microsoft.com/en-us/windows/win32/api/winsock/nf-winsock-gethostbyaddr than gethostbyaddr is not anymore used and should be replaced by getnameinfo

Any help appreciated

Regards

Edited August 6, 2020 by Ebola57

[jguinch]

Can you try the same script using "autoitscript.com" as hostname ?

I think your hostname is not registred in the Reverse lookup Zone of your DNS server

Try the command nslookup IP (where IP is the IP address of the host) to see if the issue is related to autoit or not.

 

Edited August 6, 2020 by jguinch

[Ebola57]

Using "autoitscript.com" leads to success, resulst is "server1.autoitscript.com"

nslookup MyIp
Serveur :   server.domain.fr
Address:  ServerIP

*** server.domain.fr ne parvient pas à trouver MyIp : Non-existent domain
Pinging expected domain leads to a correct resolving IP

[jguinch]

OK, so it's not an Autoit issue, it's a reverse DNS issue.

What kind of host is it ? an internal host or public host ? If it's an internal host, ask to your IT best friend to add an entry in the reverse lookup zone on your internal DNS server

 

 

Edited August 6, 2020 by jguinch

[Ebola57]

It's a switch on my local LAN, private LAN
My IT system is so screwed, that I will never get response to such query
Thanks anyway