TRAP/INFORM notification

pysnmp.hlapi.asyncio.sendNotification(snmpEngine, authData, transportTarget, contextData, notifyType, varBinds, **options)

Creates a generator to send SNMP notification.

When itereator gets advanced by asyncio main loop, SNMP TRAP or INFORM notification is send (RFC 1905#section-4.2.6). The iterator yields asyncio.Future which gets done whenever response arrives or error occurs.

Parameters:
  • snmpEngine (SnmpEngine) – Class instance representing SNMP engine.
  • authData (CommunityData or UsmUserData) – Class instance representing SNMP credentials.
  • transportTarget (UdpTransportTarget or Udp6TransportTarget) – Class instance representing transport type along with SNMP peer address.
  • contextData (ContextData) – Class instance representing SNMP ContextEngineId and ContextName values.
  • notifyType (str) – Indicates type of notification to be sent. Recognized literal values are trap or inform.
  • varBinds (tuple) – Single NotificationType class instance representing a minimum sequence of MIB variables required for particular notification type. Alternatively, a sequence of ObjectType objects could be passed instead. In the latter case it is up to the user to ensure proper Notification PDU contents.
Other Parameters:
 

**options – Request options:

  • lookupMib - load MIB and resolve response MIB variables at the cost of slightly reduced performance. Default is True.
Yields:
  • errorIndication (str) – True value indicates SNMP engine error.
  • errorStatus (str) – True value indicates SNMP PDU error.
  • errorIndex (int) – Non-zero value refers to varBinds[errorIndex-1]
  • varBinds (tuple) – A sequence of ObjectType class instances representing MIB variables returned in SNMP response.
Raises:

PySnmpError – Or its derivative indicating that an error occurred while performing SNMP operation.

Notes

The sendNotification generator will be exhausted immidiately unless an instance of NotificationType class or a sequence of ObjectType varBinds are send back into running generator (supported since Python 2.6).

Examples

>>> import asyncio
>>> from pysnmp.hlapi.asyncio import *
>>>
>>> @asyncio.coroutine
... def run():
...     errorIndication, errorStatus, errorIndex, varBinds = yield from sendNotification(
...         SnmpEngine(),
...         CommunityData('public'),
...         UdpTransportTarget(('demo.snmplabs.com', 162)),
...         ContextData(),
...         'trap',
...         NotificationType(ObjectIdentity('IF-MIB', 'linkDown')))
...     print(errorIndication, errorStatus, errorIndex, varBinds)
...
>>> asyncio.get_event_loop().run_until_complete(run())
(None, 0, 0, [])
>>>