Get some MIB information over UDP

[enaiman]

Again asking for help ...

I'm trying to get some MIB sections over an UDP connection (SNMP).

The port used to connect to a device and to get some information using SNMP is 161. I've found many 3rd party MIB browsers and SNMP software but I would like to avoid using them and I wonder if it is possible to do it using UDP commands in AutoIt.

If some1 have the knowledge and could help me in this matter I would really appreciate it.

Thank you,

[BrettF]

First step, see what we can recive?

#include <GUIConstants.au3>
$IP = "127.0.0.1"

$hwnd = GUICreate ("MIB Data Viewer", 800, 600)
$edit1 = GUICtrlCreateEdit ("", 0, 0, 800, 600)
GUICtrlSetBkColor (-1, 0x000000)
GUICtrlSetColor ($edit1, 0xFFFFFF)
UDPStartup()
$socket = UDPBind($IP, 161)
If @error <> 0 Then Exit

GUISetState (@SW_SHOW)
While 1
    $msg = GUIGetMsg ()
    $data = UDPRecv($socket, 256)
    If $data <> "" Then
        GUICtrlSetData ($edit1, GUICtrlRead ($edit1) & @CRLF & _
        "------------------------------------------------------------------------------------------" & _
        @CRLF & $data)
    EndIf
    Select
        Case $msg = $GUI_EVENT_CLOSE
            Exit
    EndSelect
WEnd

Func OnAutoItExit()
    UDPCloseSocket($socket)
    UDPShutdown()
EndFunc

[enaiman]

It looks like it doesn't work.

Your code exits on

$socket = UDPBind($IP, 161)
If @error <> 0 Then Exit

I've added a couple lines for debugging:

If @error = 1 Then MsgBox(0, "error", "Incorrect IP")
If @error = 2 Then MsgBox(0, "error", "Incorrect port") 
MsgBox(0, "error", @error)

to see what's happening - the error returned was 10049 - so it is not a matter of wrong IP neither a wrong port (my switch IP is 192.168.0.20 and I've modified the script accordingly).

Also tried to send a character to see if I receive something - the same result. I guess I'll have to look for an explanation for SNMP ... dunno if I can find something but I'll try.

Thanks for help Bert,

[ptrex]

@all

Maybe this tool can get you started.

SNMP Tool

EDIT : Added comments

In Windows there is a tied integration between SNMP and WMI.

How to get started is like this :

SNMP In WMI

regards

ptrex

Edited October 1, 2007 by ptrex

[enaiman]

Thanks Ptrex - the link to MSDN Library is awesome I've found many things about SNMP on the Internet but this is by far the most useful.

[ptrex]

@enaiman

This should get you started reading the MIB files :

$objLocator = ObjCreate("WbemScripting.SWbemLocator")
$objServices = $objLocator.connectServer("", "root/snmp/localhost")

$objNamedValueSet= ObjCreate("WbemScripting.SWbemNamedValueSet")

$objNamedValueSet.Add ("AgentAddress", "localhost")
$objNamedValueSet.Add ("AgentReadCommunityName", "public")
$objNamedValueSet.Add ("AgentWriteCommunityName", "private")

$class = "SNMP_RFC1213_MIB_system"

$objSet = $objServices.instancesof( $class,Default,$objNamedValueSet)

for $obj in $objset
    ConsoleWrite ( "-----------------------------" & @CRLF)
    for $prop in $obj.properties_
        ConsoleWrite ( $prop.name & " : " & $prop.value & @CRLF)
    next
next

I hope it does get you going.

If you have found what you are looking for,

please post some example scritps in the Example section of the forum.

This can help some more people when needed.

regards,

ptrex

[enaiman]

If you have found what you are looking for,

please post some example scritps in the Example section of the forum.

This can help some more people when needed.

@ptrex

Thank you very much for your help. Be sure that once I figure out what to do and I'll get a working script I'll post it there.

[skewltek]

First post here, I'm a MAJOR newbie.

Has anyone created a solution for trapping SNMP in AutoIT? I'm just touching the surface of AutoIT and SNMP, and I need a little direction. I'm trying to create a script that would require a limited user to enter a hostname of a printer (IP Printing) and would then retrieve some basic info about the printer using SNMP (OIDs .1.3.6.1.2.1.1.1.0 [Printer model] and .1.3.6.1.2.1.1.6.0 [Description]) before setting up the printer for the user.

I looked through the sample scripts but didn't find anything that satisfied my need.

Thanks!

[ptrex]

@skewltek

Maybe this can get you going :

$wbemFlagReturnImmediately = 0x10
$wbemFlagForwardOnly = 0x20

$objLocator = ObjCreate("wbemscripting.swbemlocator")

$objServices = $objLocator.ConnectServer(, "root\snmp\mngd_hub")
$objServices.security_.privileges.AddAsString("SeSecurityPrivilege")
$objSet = $objServices.ExecQuery ("SELECT * FROM SNMP_NET_DEVICE_123 WHERE hdwr_idx>1" , "WQL", $wbemFlagReturnImmediately + $wbemFlagForwardOnly)

for $obj in $objset
ConsoleWrite( "do whatever ..." & @LF)
Next

;---------------------- SNMP Action ------------------------

$wbemFlagReturnImmediately = 0x10
$wbemFlagForwardOnly = 0x20

$objLocator = ObjCreate("wbemscripting.swbemlocator")

$objServices = $objLocator.ConnectServer(, "root\snmp\mngd_hub")
$objServices.security_.privileges.AddAsString("SeSecurityPrivilege")
$obj= $objServices.Get("SNMP_NET_DEVICE_123=@")
$obj.deviceLocation = "40/5073"
$obj.put_

It's not showing how to Monitor traps, but you will find examples on the net to do so.

Anyhow this is a link on how to : WMI and SNMP monitoring

Basically you need to map the SNMP TRAPS to the WMI EVENTS in order to get the ball rolling.

Regards,

ptrex

Edited December 4, 2007 by ptrex

[skewltek]

Thanks for your quick reply, ptrex. I think that the problem that I have is that I want user machines to be able to poll SNMP on thier computers, and most of them won't have the WMI SNMP service installed or started on thier machines. If there is not a way I can use the native TCP and/or UDP libraries in AutoIT for this then I will just use a third party command line app to retrieve what I need.

[ptrex]

@skewltek

if you have a commandline tool that can do this.

Let me know which one I might need it too.

Regards

ptrex

[skewltek]

if you have a commandline tool that can do this.

Let me know which one I might need it too.

There are a couple, one is in a Windows RK, it's called Snmputil.exe and it is pretty simple. Basically:

Snmputil.exe get 10.0.212.2 public .1.3.6.1.2.1.1.6.0

>Variable = system.sysLocation.0
>Value  = String Front Office

The other is in an opensource package from http://www.net-snmp.org/ and it comes with several SNMP monitoring commandline tools. I haven't played with it enough to know what it can do, but it looks pretty extensive.

So are you confirming that AutoIT doesn't have a way built into it that can perform SNMP traps, and that it relies on an outside source (either WMI or a commandline tool like one here) to handle that? I just want to make sure before I spend any more time searching in vain and start researching how to parse commandline output in AutoIT.

Thanks for you're help.