Kyan

SNMP request returning weird output

3 posts in this topic

#1 ·  Posted (edited)

Sorry for posting this here, the other board is being spam by some jerk so I'm posting this here temporarily

I'm trying to retrieve a snmp output from my router, I can do it using "snmpwalk 5.7.0" and "MIB Browser", so is not a problem with router configuration. 

#include "snmp_UDF-v1.7.4.au3"

Global $Port = 161 ; UDP 161 = SNMP port
Global $SNMP_Version = 2 ; SNMP v2c (1 for SNMP v1)
Global $SNMP_Community = "public" ; SNMPString(Community) (change it)
Global $SNMP_ReqID = 1
Global $SNMP_Command
Global $Start = 1
Global $result
Global $Timeout_msec = 2500

UDPStartup()
$Socket = UDPOpen('192.168.1.1', $Port)
$SNMP_Command = _SNMPBuildPacket('.1.3.6.1.2.1.1.5', $SNMP_Community, $SNMP_Version, $SNMP_ReqID, "A0")
UDPSend($Socket, $SNMP_Command)
_StartListener()
Sleep(200)
UDPCloseSocket($Socket)
UDPShutdown()
Sleep(200)
Exit

Func _StartListener()
    If $Start = 1 Then
        $Timeout = TimerInit()
        While (1)
            $srcv = UDPRecv($Socket, 1200)
            If ($srcv <> "") Then
                $result = _ShowSNMPReceived($srcv)
                ConsoleWrite("received: " & $srcv &@LF)
                ;_ArrayDisplay($result)
                ExitLoop
            EndIf
            Sleep(100)
            If TimerDiff($Timeout) > $Timeout_msec Then
                ExitLoop
            EndIf
        WEnd
    EndIf
EndFunc   ;==>_StartListener

Func OnAutoItExit()
    UDPCloseSocket($Socket)
    UDPShutdown()
EndFunc   ;==>OnAutoItExit

Request oid: .1.3.6.1.2.1.1.5

Expected result: TP-LINK

Received: 0x3082002E02010104067075626C6963A282001F020101020100020100308200123082000E060A2B0001030601020101058000 [ascii: 0‚.public¢‚0‚0‚ +€]

what am I doing wrong here? There's other cleaner way of doing this, like _snmpGet(server,comunity, oid)?

thanks for your time :)

EDIT: So, there's an output when I use "A1" parameter (but not the correct one), but with A0 I returns 0 or something like that

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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#2 ·  Posted (edited)

Was using the OID with a dot in the beginning, snmp udf doesn't like it.

How do I interpret this: 0‚3public¢‚$0‚0‚+TP-LINK

Looks random the way is made, everything between commas, but why "+" before the normal output?

EDIT: There's a _ShowSNMPReceived() function for it *facepalm*, that's what I get for doing this sleepy.

Now I have another problem, how do I receive bulk requests, in snmpwalk I just need to make the OID "less specific" but with this UDF I'm not seeing how to do it.

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
happy.png

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BUMP

Anyway I can get the subtree using _SNMPBuildPacket() in bulk?

snmp_Get_Subtree.png


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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