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# GETNEXT Command Generator
from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.carrier.twisted import dispatch
from pysnmp.carrier.twisted.dgram import udp
from pysnmp.entity.rfc3413.twisted import cmdgen
from pyasn1.type import univ
snmpEngine = engine.SnmpEngine()
# Set Twisted dispatcher
snmpEngine.registerTransportDispatcher(dispatch.TwistedDispatcher())
# v1/2 setup
config.addV1System(snmpEngine, 'test-agent', 'public')
# v3 setup
config.addV3User(
snmpEngine, 'test-user',
config.usmHMACMD5AuthProtocol, 'authkey1',
config.usmDESPrivProtocol, 'privkey1'
)
# Transport params
config.addTargetParams(snmpEngine, 'myParams', 'test-user', 'authPriv')
#config.addTargetParams(snmpEngine, 'myParams', 'test-agent', 'noAuthNoPriv', 1)
# Transport addresses
config.addTargetAddr(
snmpEngine, 'myRouter', config.snmpUDPDomain,
('127.0.0.1', 161), 'myParams'
)
# Transport
config.addSocketTransport(
snmpEngine,
udp.domainName,
udp.UdpTwistedTransport().openClientMode()
)
# Twisted API follows
def receiveResponse(cbCtx):
(errorIndication, errorStatus, errorIndex, varBindTable) = cbCtx
if errorIndication:
print('Error: %s' % errorIndication)
reactor.stop()
return
if errorStatus and errorStatus != 2:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBindTable[-1][int(errorIndex)-1] or '?'
)
)
reactor.stop()
return
for varBindRow in varBindTable:
for oid, val in varBindRow:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
for o, v in varBindTable[-1]:
if not isinstance(v, univ.Null):
break
else:
reactor.stop() # no more objects available
return
df = defer.Deferred()
df.addCallback(receiveResponse)
return df # this is to indicate that we wish to continue walking
nextCmdGen = cmdgen.NextCommandGenerator()
df = nextCmdGen.sendReq(
snmpEngine, 'myRouter', (((1,3,6,1,2,1,1), None),)
)
df.addCallback(receiveResponse)
reactor.run()
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