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#
# GET Command Generator
#
# 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.asynsock.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 (choose one entry depending of the transport needed).
#
# UDP/IPv4
config.addSocketTransport(
snmpEngine,
udp.domainName,
udp.UdpSocketTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-router',
udp.domainName, ('127.0.0.1', 161),
'my-creds'
)
# Error/response reciever
def cbFun(sendRequestHandle,
errorIndication, errorStatus, errorIndex,
varBinds, cbCtx):
if errorIndication:
print(errorIndication)
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[-1][int(errorIndex)-1] or '?'
)
)
else:
for oid, val in varBinds:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
# Prepare and send a request message
cmdgen.GetCommandGenerator().sendReq(
snmpEngine,
'my-router',
( ((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()
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