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"""
SNMPv3, auth: SHA, privacy: AES128
++++++++++++++++++++++++++++++++++
Send a SNMP GET request
* with SNMPv3 with user 'usr-sha-aes', SHA auth and AES128 privacy protocols
* over IPv4/UDP
* to an Agent at 127.0.0.1:161
* for an OID in tuple form
This script performs similar to the following Net-SNMP command:
| $ snmpget -v3 -l authPriv -u usr-sha-aes -a SHA -A authkey1 -x AES -X privkey1 -ObentU 127.0.0.1:161 1.3.6.1.2.1.1.1.0
"""#
from pysnmp.entity import engine, config
from pysnmp.carrier.asyncore.dgram import udp
from pysnmp.entity.rfc3413 import cmdgen
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv3/USM setup
#
# user: usr-sha-aes, auth: SHA, priv AES
config.addV3User(
snmpEngine,
"usr-sha-aes",
config.usmHMACSHAAuthProtocol,
"authkey1",
config.usmAesCfb128Protocol,
"privkey1",
)
config.addTargetParams(snmpEngine, "my-creds", "usr-sha-aes", "authPriv")
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine, udp.domainName, udp.UdpSocketTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, "my-router", udp.domainName, ("127.0.0.1", 161), "my-creds"
)
# Error/response receiver
# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(
snmpEngine,
sendRequestHandle,
errorIndication,
errorStatus,
errorIndex,
varBinds,
cbCtx,
):
if errorIndication:
print(errorIndication)
elif errorStatus:
print(
"{} at {}".format(
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or "?",
)
)
else:
for oid, val in varBinds:
print(f"{oid.prettyPrint()} = {val.prettyPrint()}")
# Prepare and send a request message
cmdgen.GetCommandGenerator().sendVarBinds(
snmpEngine,
"my-router",
None,
"", # contextEngineId, contextName
[((1, 3, 6, 1, 2, 1, 1, 1, 0), None)],
cbFun,
)
# Run I/O dispatcher which would send pending queries and process responses
snmpEngine.transportDispatcher.runDispatcher()
config.delTransport(snmpEngine, udp.domainName).closeTransport()
|
