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"""
Send crafted TRAP PDU
+++++++++++++++++++++
Initialize TRAP PDU and pass it over to unified SNMPv3 message processing
framework for further treatment.
* SNMPv2c
* with community name 'public'
* over IPv4/UDP
* send TRAP notification
* initialize TRAP PDU with the following var-binds:
1.3.6.1.2.1.1.3.0 = 123
1.3.6.1.6.3.1.1.4.1.0 = 1.3.6.1.6.3.1.1.5.1
Functionally similar to:
| $ snmptrap -v1 -c public 127.0.0.1 1.3.6.1.6.3.1.1.5.1 0.0.0.0 1 0 123
"""#
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()
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')
# Specify security settings per SecurityName (SNMPv2c -> 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 1)
# Setup transport endpoint and bind it with security settings yielding
# a target name
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpSocketTransport().openClientMode()
)
# Create named target
config.addTargetAddr(
snmpEngine, 'my-nms',
udp.domainName, ('127.0.0.1', 162),
'my-creds'
)
# *** SNMP engine configuration is complete by this line ***
# Create SNMP v2c TRAP PDU with defaults
trapPDU = v2c.TrapPDU()
v2c.apiTrapPDU.setDefaults(trapPDU)
# Set custom var-binds to TRAP PDU
v2c.apiTrapPDU.setVarBinds(
trapPDU, [
# sysUpTime
( v2c.ObjectIdentifier('1.3.6.1.2.1.1.3.0'), v2c.TimeTicks(123) ),
# snmpTrapPDU
( (1,3,6,1,6,3,1,1,4,1,0), v2c.ObjectIdentifier((1,3,6,1,6,3,1,1,5,1)) )
]
)
# 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
ntfOrg.sendPdu(
snmpEngine,
# Notification targets
'my-nms', # target address
None, '', # contextEngineId, contextName
trapPDU,
cbFun
)
print('Notification is scheduled to be sent')
# Run I/O dispatcher which would send pending message and process response
snmpEngine.transportDispatcher.runDispatcher()
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