174 lines
6.3 KiB
Python
174 lines
6.3 KiB
Python
#
|
|
# This file is part of pysnmp software.
|
|
#
|
|
# Copyright (c) 2005-2018, Ilya Etingof <etingof@gmail.com>
|
|
# License: http://snmplabs.com/pysnmp/license.html
|
|
#
|
|
from pysnmp.smi.rfc1902 import *
|
|
from pysnmp.entity.rfc3413 import ntforg
|
|
from pysnmp.hlapi.v3arch.auth import *
|
|
from pysnmp.hlapi.v3arch.context import *
|
|
from pysnmp.hlapi.v3arch.lcd import *
|
|
from pysnmp.hlapi.varbinds import *
|
|
from pysnmp.hlapi.v3arch.asyncore.transport import *
|
|
|
|
__all__ = ['sendNotification']
|
|
|
|
vbProcessor = NotificationOriginatorVarBinds()
|
|
lcd = NotificationOriginatorLcdConfigurator()
|
|
|
|
|
|
def sendNotification(snmpEngine, authData, transportTarget, contextData,
|
|
notifyType, *varBinds, **options):
|
|
"""Send SNMP notification.
|
|
|
|
Based on passed parameters, prepares SNMP TRAP or INFORM
|
|
notification (:RFC:`1905#section-4.2.6`) and schedules its
|
|
transmission by I/O framework at a later point of time.
|
|
|
|
Parameters
|
|
----------
|
|
snmpEngine : :py:class:`~pysnmp.hlapi.SnmpEngine`
|
|
Class instance representing SNMP engine.
|
|
|
|
authData : :py:class:`~pysnmp.hlapi.CommunityData` or :py:class:`~pysnmp.hlapi.UsmUserData`
|
|
Class instance representing SNMP credentials.
|
|
|
|
transportTarget : :py:class:`~pysnmp.hlapi.asyncore.UdpTransportTarget` or :py:class:`~pysnmp.hlapi.asyncore.Udp6TransportTarget`
|
|
Class instance representing transport type along with SNMP peer
|
|
address.
|
|
|
|
contextData : :py:class:`~pysnmp.hlapi.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: :class:`tuple` of OID-value pairs or :py:class:`~pysnmp.smi.rfc1902.ObjectType` or :py:class:`~pysnmp.smi.rfc1902.NotificationType`
|
|
One or more objects representing MIB variables to place
|
|
into SNMP notification. It could be tuples of OID-values
|
|
or :py:class:`~pysnmp.smi.rfc1902.ObjectType` class instances
|
|
of :py:class:`~pysnmp.smi.rfc1902.NotificationType` objects.
|
|
|
|
SNMP Notification PDU includes some housekeeping items that
|
|
are required for SNMP to function.
|
|
|
|
Agent information:
|
|
|
|
* SNMPv2-MIB::sysUpTime.0 = <agent uptime>
|
|
* SNMPv2-SMI::snmpTrapOID.0 = {SNMPv2-MIB::coldStart, ...}
|
|
|
|
Applicable to SNMP v1 TRAP:
|
|
|
|
* SNMP-COMMUNITY-MIB::snmpTrapAddress.0 = <agent-IP>
|
|
* SNMP-COMMUNITY-MIB::snmpTrapCommunity.0 = <snmp-community-name>
|
|
* SNMP-COMMUNITY-MIB::snmpTrapEnterprise.0 = <enterprise-OID>
|
|
|
|
.. note::
|
|
|
|
Unless user passes some of these variable-bindings, `.sendNotification()`
|
|
call will fill in the missing items.
|
|
|
|
User variable-bindings:
|
|
|
|
* SNMPv2-SMI::NOTIFICATION-TYPE
|
|
* SNMPv2-SMI::OBJECT-TYPE
|
|
|
|
.. note::
|
|
|
|
The :py:class:`~pysnmp.smi.rfc1902.NotificationType` object ensures
|
|
properly formed SNMP notification (to comply MIB definition). If you
|
|
build notification PDU out of :py:class:`~pysnmp.smi.rfc1902.ObjectType`
|
|
objects or simple tuples of OID-value objects, it is your responsibility
|
|
to provide well-formed notificaton payload.
|
|
|
|
Other Parameters
|
|
----------------
|
|
\*\*options:
|
|
|
|
* lookupMib: bool
|
|
`lookupMib` - load MIB and resolve response MIB variables at
|
|
the cost of slightly reduced performance. Default is `True`.
|
|
* cbFun: callable
|
|
user-supplied callable that is invoked to pass SNMP response
|
|
to *INFORM* notification or error to user at a later point of
|
|
time. The `cbFun` callable is never invoked for *TRAP* notifications.
|
|
* cbCtx: object
|
|
user-supplied object passing additional parameters to/from
|
|
`cbFun`
|
|
|
|
Notes
|
|
-----
|
|
User-supplied `cbFun` callable must have the following call
|
|
signature:
|
|
|
|
* snmpEngine (:py:class:`~pysnmp.hlapi.SnmpEngine`):
|
|
Class instance representing SNMP engine.
|
|
* sendRequestHandle (int): Unique request identifier. Can be used
|
|
for matching multiple ongoing *INFORM* notifications with received
|
|
responses.
|
|
* 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
|
|
:py:class:`~pysnmp.smi.rfc1902.ObjectType` class instances
|
|
representing MIB variables returned in SNMP response in exactly
|
|
the same order as `varBinds` in request.
|
|
* `cbCtx` : Original user-supplied object.
|
|
|
|
Returns
|
|
-------
|
|
sendRequestHandle : int
|
|
Unique request identifier. Can be used for matching received
|
|
responses with ongoing *INFORM* requests. Returns `None` for
|
|
*TRAP* notifications.
|
|
|
|
Raises
|
|
------
|
|
PySnmpError
|
|
Or its derivative indicating that an error occurred while
|
|
performing SNMP operation.
|
|
|
|
Examples
|
|
--------
|
|
>>> from pysnmp.hlapi.asyncore import *
|
|
>>>
|
|
>>> snmpEngine = SnmpEngine()
|
|
>>> sendNotification(
|
|
... snmpEngine,
|
|
... CommunityData('public'),
|
|
... UdpTransportTarget(('demo.snmplabs.com', 162)),
|
|
... ContextData(),
|
|
... 'trap',
|
|
... NotificationType(ObjectIdentity('SNMPv2-MIB', 'coldStart')),
|
|
... )
|
|
>>> snmpEngine.transportDispatcher.runDispatcher()
|
|
>>>
|
|
|
|
"""
|
|
|
|
# noinspection PyShadowingNames
|
|
def __cbFun(snmpEngine, sendRequestHandle, errorIndication,
|
|
errorStatus, errorIndex, varBinds, cbCtx):
|
|
lookupMib, cbFun, cbCtx = cbCtx
|
|
return cbFun and cbFun(
|
|
snmpEngine, sendRequestHandle, errorIndication,
|
|
errorStatus, errorIndex,
|
|
vbProcessor.unmakeVarBinds(
|
|
snmpEngine.cache, varBinds, lookupMib
|
|
), cbCtx
|
|
)
|
|
|
|
notifyName = lcd.configure(snmpEngine, authData, transportTarget,
|
|
notifyType, contextData.contextName)
|
|
|
|
return ntforg.NotificationOriginator().sendVarBinds(
|
|
snmpEngine, notifyName,
|
|
contextData.contextEngineId, contextData.contextName,
|
|
vbProcessor.makeVarBinds(snmpEngine.cache, varBinds), __cbFun,
|
|
(options.get('lookupMib', True),
|
|
options.get('cbFun'), options.get('cbCtx'))
|
|
)
|