CODEWITHSUNDEEP
pythonsnmpmibpysnmp
Niklas Schnelle
Niklas Schnelle

Reputation: 1249

pysnmp 4.2.5 sending trap with object fails in sendPdu

so I'm trying to get traps working in our project. We are using a custom mib and walking it already works, also sending traps without additional data works fine with the following code and the OBJECT property removed from the trap in the MIB:

def sendEventTrap(self, event):
    if(doPrintTraps):
        print "Sending trap"
    ntfOrg = ntforg.NotificationOriginator(self._snmpContext)
    errorIndication = ntfOrg.sendNotification(
        self._snmpEngine,
        'trap',
        ('PROJECT-MIB', 'eventTrap'),
        ())

Now I'm trying to add a simple Integer32 additional object like so

def sendEventTrap(self, event):
    if(doPrintTraps):
        print "Sending trap"
    ntfOrg = ntforg.NotificationOriginator(self._snmpContext)
    errorIndication = ntfOrg.sendNotification(
        self._snmpEngine,
        'trap',
        ('PROJECT-MIB', 'eventTrap'),
        [((1, 3, 6, 1, 4, 1, 999999, 3, 1, 0) , v2c.Integer32(1337))])

However this fails even though according to the following log it does find and match the right OID with the correctly associated Integer32 type: http://pastebin.com/hJ9LAiAg

This is the relevant part of the MIB:

eventNotifications OBJECT IDENTIFIER ::= { xxx 4 }

eventTrap NOTIFICATION-TYPE
    OBJECTS     { direction }
    STATUS current
    DESCRIPTION ""
::= {eventNotifications 1}

NOTE some function names have been changed for privacy reasons. I'm at a loss here and would greatly appreciate inputs as to where things are going wrong.

Upvotes: 0

Views: 566

Answers (1)

Niklas Schnelle
Niklas Schnelle

Reputation: 1249

I finally got this working. There were actually two problems.

  1. This functionality seems to be broken in 4.2.5 where my current code still fails with a key error. On 4.3.2 it works well.
  2. The code above is missing instanceIndex=(0,) as a parameter and when sending an already managed object one doesn't have to include it as a varBind by hand.

The following works with the declarations as in the questions MIB: 

ntfOrg = ntforg.NotificationOriginator(self._snmpContext)
errorIndication = ntfOrg.sendNotification(
    self._snmpEngine,
    'trap',
    ('PROJECT-MIB', 'eventTrap'),
    instanceIndex=(0,))

Upvotes: 1

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