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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, 127.0.0.1:162
* 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'
| $ snmpinform -v2c -c public 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'
"""#
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
# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(
snmpEngine,
sendRequestHandle,
errorIndication,
errorStatus,
errorIndex,
varBinds,
cbCtx,
):
print(
"Notification {}, status - {}".format(
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()
|
