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"""
SNMPv1 TRAP
+++++++++++
Send SNMP notification using the following options:
* SNMPv1
* with community name 'public'
* over IPv4/UDP
* using Twisted framework for network transport
* to a Manager at 127.0.0.1:162
* send TRAP notification
* with TRAP ID 'coldStart' specified as an OID
* include managed objects information:
* overriding Uptime value with 12345
* overriding Agent Address with '127.0.0.1'
* overriding Enterprise OID with 1.3.6.1.4.1.20408.4.1.1.2
* include managed object information '1.3.6.1.2.1.1.1.0' = 'my system'
Functionally similar to:
| $ snmptrap -v1 -c public 127.0.0.1 1.3.6.1.4.1.20408.4.1.1.2 127.0.0.1 6 432 12345 1.3.6.1.2.1.1.1.0 s 'my system'
"""#
from twisted.internet import reactor
from pysnmp.entity import engine, config
from pysnmp.carrier.twisted.dgram import udp
from pysnmp.entity.rfc3413 import context
from pysnmp.entity.rfc3413.twisted import ntforg
from pysnmp.proto import rfc1902
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
# SNMPv1 setup
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')
# Specify security settings per SecurityName (SNMPv1 -> 0)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)
# Transport setup
#
# Setup transport endpoint and bind it with security settings yielding
# a target name. Since Notifications could be sent to multiple Managers
# at once, more than one target entry may be configured (and tagged).
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-nms-1',
udp.domainName, ('127.0.0.1', 162),
'my-creds',
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', 'trap'
)
# Allow NOTIFY access to Agent's MIB by this SNMP model (1), securityLevel
# and SecurityName
config.addContext(snmpEngine, '')
config.addVacmUser(snmpEngine, 1, 'my-area', 'noAuthNoPriv', (), (), (1,3,6))
# Create Notification Originator App instance.
ntfOrg = ntforg.NotificationOriginator()
# Create default SNMP context where contextEngineId == SnmpEngineId
snmpContext = context.SnmpContext(snmpEngine)
# Prepare notification to be sent yielding Twisted deferred object
ntfOrg.sendVarBinds(
snmpEngine,
# Notification targets
'my-notification',
# SNMP Context
snmpContext,
# contextName
'',
# notification name: Generic Trap #6 (enterpriseSpecific)
# and Specific Trap 432
'1.3.6.1.4.1.20408.4.1.1.2.0.432',
# notification objects instance index
None,
# additional var-binds holding SNMPv1 TRAP details
[
# Uptime value with 12345
(rfc1902.ObjectName('1.3.6.1.2.1.1.3.0'),
rfc1902.TimeTicks(12345)),
# Agent Address with '127.0.0.1'
(rfc1902.ObjectName('1.3.6.1.6.3.18.1.3.0'),
rfc1902.IpAddress('127.0.0.1')),
# Enterprise OID with 1.3.6.1.4.1.20408.4.1.1.2
(rfc1902.ObjectName('1.3.6.1.6.3.1.1.4.3.0'),
rfc1902.ObjectName('1.3.6.1.4.1.20408.4.1.1.2')),
# managed object '1.3.6.1.2.1.1.1.0' = 'my system'
(rfc1902.ObjectName('1.3.6.1.2.1.1.1.0'),
rfc1902.OctetString('my system'))
]
)
print('Notification is scheduled to be sent')
# Schedule Twisted mainloop shutdown shortly
reactor.callWhenRunning(lambda: reactor.stop())
# Run Twisted main loop
reactor.run()
|
