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"""
Send packet from specific network interface/port
++++++++++++++++++++++++++++++++++++++++++++++++
Send SNMP notification using the following options:
* SNMPv1
* with community name 'public'
* over IPv4/UDP
* to a Manager at 127.0.0.1 UDP port 162
* from local address 0.0.0.0, UDP port 61024
* send TRAP notification
* with TRAP ID 'coldStart' specified as an OID
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 0
"""#
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", transportTag="all-my-managers")
# Specify security settings per SecurityName (SNMPv1 -> 0)
config.addTargetParams(snmpEngine, "my-creds", "my-area", "noAuthNoPriv", 0)
# Setup transport endpoint and bind it with security settings yielding
# a target name. Pay attention to the openClientMode() parameter -- it's
# used to originate packets from particular local IP:port
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpSocketTransport().openClientMode(iface=("0.0.0.0", 61024)),
)
config.addTargetAddr(
snmpEngine,
"my-nms",
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))
# *** SNMP engine configuration is complete by this line ***
# Create Notification Originator App instance.
ntfOrg = ntforg.NotificationOriginator()
# Build and submit notification message to dispatcher
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)),
)
],
)
print("Notification is scheduled to be sent")
# Run I/O dispatcher which would send pending message and stop
snmpEngine.transportDispatcher.runDispatcher()
|
