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|
"""
Notification over multiple SNMP versions
++++++++++++++++++++++++++++++++++++++++
Send SNMP INFORM notifications to multiple Managers using different
security settings:
* SNMPv2c
* with community name 'public'
* AND
* SNMPv3
* with user 'usr-md5-none', auth: MD5, priv NONE
* over IPv4/UDP
* send INFORM notification
* to multiple Managers at 127.0.0.1:162, 127.0.0.2:162
* with TRAP ID 'coldStart' specified as an OID
* include managed objects information:
1.3.6.1.2.1.1.1.0 = 'Example Notificator'
Functionally similar to:
| $ snmpinform -v3 -l authPriv -u usr-md5-none -A authkey1 127.0.0.1 0 1.3.6.1.6.3.1.1.5.1 1.3.6.1.2.1.1.1.0 s 'Example notification'
and
| $ snmpinform -v2c -c public 127.0.0.2 0 1.3.6.1.6.3.1.1.5.1 1.3.6.1.2.1.1.1.0 s 'Example notification'
"""#
from pysnmp.entity import engine, config
from pysnmp.carrier.asyncore.dgram import udp
from pysnmp.entity.rfc3413 import ntforg
from pysnmp.proto.api import v2c
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
# SNMPv2c:
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public', transportTag='all-my-managers')
# Specify security settings per SecurityName (SNMPv2c -> 1)
config.addTargetParams(snmpEngine, 'my-creds-1', 'my-area', 'noAuthNoPriv', 1)
# SNMPv3:
config.addV3User(
snmpEngine, 'usr-md5-none',
config.usmHMACMD5AuthProtocol, 'authkey1'
)
config.addTargetParams(snmpEngine, 'my-creds-2', 'usr-md5-none', 'authNoPriv')
# Setup transport endpoint and bind it with security settings yielding
# a target name
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpSocketTransport().openClientMode()
)
# First target
config.addTargetAddr(
snmpEngine, 'my-nms-1',
udp.domainName, ('127.0.0.1', 162),
'my-creds-1',
tagList='all-my-managers'
)
# Second target
config.addTargetAddr(
snmpEngine, 'my-nms-2',
udp.domainName, ('127.0.0.1', 162),
'my-creds-2',
tagList='all-my-managers'
)
# Specify what kind of notification should be sent (TRAP or INFORM),
# to what targets (chosen by tag) and what filter should apply to
# the set of targets (selected by tag)
config.addNotificationTarget(
snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'inform'
)
# Allow NOTIFY access to Agent's MIB by this SNMP model (2&3), securityLevel
# and SecurityName
config.addContext(snmpEngine, '')
config.addVacmUser(snmpEngine, 2, 'my-area', 'noAuthNoPriv', (), (), (1,3,6))
config.addVacmUser(snmpEngine, 3, 'usr-md5-none', 'authNoPriv', (), (), (1,3,6))
# *** SNMP engine configuration is complete by this line ***
# Create Notification Originator App instance.
ntfOrg = ntforg.NotificationOriginator()
# Error/confirmation receiver
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
errorStatus, errorIndex, varBinds, cbCtx):
print('Notification %s, status - %s' % (
sendRequestHandle, errorIndication and errorIndication or 'delivered'
)
)
# Build and submit notification message to dispatcher
sendRequestHandle = ntfOrg.sendVarBinds(
snmpEngine,
'my-notification', # notification targets
None, '', # contextEngineId, contextName
# var-binds
[
# SNMPv2-SMI::snmpTrapOID.0 = SNMPv2-MIB::coldStart
((1,3,6,1,6,3,1,1,4,1,0), v2c.ObjectIdentifier((1,3,6,1,6,3,1,1,5,1))),
# additional var-binds: ( (oid, value), ... )
((1,3,6,1,2,1,1,1,0), v2c.OctetString('Example Notificator'))
],
cbFun
)
print('Notifications %s are scheduled to be sent' % sendRequestHandle)
# Run I/O dispatcher which would send pending message and process response
snmpEngine.transportDispatcher.runDispatcher()
|
