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Kyan

Noobie question, gethostbyaddr isn't giving me an output

14 posts in this topic

I may mess up with pointers and structs a little but, how I'm not getting a proper output? I was expecting to get my lan hostname using this (yes ping to that address gives the hostname)

I'm always getting "0"

$uip = DllCall("wsock32.dll", "long", "inet_addr", "str", "192.168.1.4")[0]
$call = DllCall("wsock32.dll", "long_ptr", "gethostbyaddr", "long_ptr", $uIP, "int", 4, "int", 2)
ConsoleWrite(DllStructGetPtr($call,1)&@LF)
Exit

arrayDisplay ouput:

Row|Col 0
[0]|0x00000000
[1]|67217600
[2]|4
[3]|2

What am I messing up here?  :mellow:


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being long or ulong still returns 67217600

I'm passing the [0] value of $uIP array :)


Heroes, there is no such thing

One day I'll discover what IE.au3 has of special for so many users using it.
C'mon there's InetRead and WinHTTP, way better
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Yes, I see now.

in any case you should pass correct type.

You might get away with it and you might not, but I doubt it when the param you are passing it to expects a string.

You wont know until you check for errors.


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that's all the code to get the other lan computer name, I'm also trying with WMI using System.Net.Dns.GetHostEntry() but I don't know how to create an object for System class


Heroes, there is no such thing

One day I'll discover what IE.au3 has of special for so many users using it.
C'mon there's InetRead and WinHTTP, way better
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This is the updated code, still outputing the 0

Local $uip = DllCall("wsock32.dll", "ulong", "inet_addr", "str", "192.168.1.4")[0]
$call = DllCall("wsock32.dll", "ptr", "gethostbyaddr", "ptr", $uIP, "int", 4, "int", 2)
ConsoleWrite(DllStructGetPtr($call,1)&@LF)
Exit

Heroes, there is no such thing

One day I'll discover what IE.au3 has of special for so many users using it.
C'mon there's InetRead and WinHTTP, way better
happy.png

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You should look in the Inet.au3 file for the function _TCPIPToName function to see how it is done in there.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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#12 ·  Posted (edited)

 wow nice, tried on my local ip (since is the only one active now) and got @ERROR = 4, @Extended = 10093 = WSANOTINITIALISED
 
Sem_T_tulo.png

I don't know what to do now  :huh2:

DllCall($hDll_Ws2_32, "ptr", "gethostbyaddr", "ptr*", $vBinIP, "int", 4, "int", $iAF_INET) returned 0 (what was happening), and then called WSAGetLastError to get the error, should I call 

WSAStartup before running gethostbyaddr?  :think:

EDIT: If WSAStartup is really necessary, I don't know how should I create this struct WSADATA, and how do I put the wsock32 versions in a byte

I know that LByte is the first 4bits (right?)

HByte is the last 4bits, but if the version is 2.2 how do I put it in bits? :s bits are 0 or 1 

Edited by Kyan

Heroes, there is no such thing

One day I'll discover what IE.au3 has of special for so many users using it.
C'mon there's InetRead and WinHTTP, way better
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If you look at the help file entry for _TCPIPToName, you'll see that you need to use TCPStartUp() before you can use the TCP functions, so I'm assuming you'd need to do that with your DLLCall as well.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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Indeed, works :D only took 26ms to fetch the other host name ^_^


Heroes, there is no such thing

One day I'll discover what IE.au3 has of special for so many users using it.
C'mon there's InetRead and WinHTTP, way better
happy.png

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