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"""
Concurrent queries
++++++++++++++++++
Send multiple SNMP GET requests at once using the following options:
* with SNMPv2c, community 'public'
* over IPv4/UDP
* to an Agent at demo.snmplabs.com:161
* for two instances of SNMPv2-MIB::sysDescr.0 and SNMPv2-MIB::sysLocation.0
MIB object,
* based on Twisted I/O framework
Functionally similar to:
| $ snmpget -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysDescr.0
| $ snmpget -v2c -c public demo.snmplabs.com SNMPv2-MIB::sysLocation.0
"""#
from twisted.internet.defer import DeferredList
from twisted.internet.task import react
from pysnmp.hlapi.twisted import *
def success(args, hostname):
(errorStatus, errorIndex, varBindTable) = args
if errorStatus:
print('%s: %s at %s' % (hostname,
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or '?'))
else:
for varBind in varBinds:
print(' = '.join([x.prettyPrint() for x in varBind]))
def failure(errorIndication, hostname):
print('%s failure: %s' % (hostname, errorIndication))
# noinspection PyUnusedLocal
def getSystem(reactor, hostname):
snmpEngine = SnmpEngine()
def getScalar(objectType):
d = getCmd(snmpEngine,
CommunityData('public', mpModel=0),
UdpTransportTarget((hostname, 161)),
ContextData(),
objectType)
d.addCallback(success, hostname).addErrback(failure, hostname)
return d
return DeferredList(
[getScalar(ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))),
getScalar(ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0)))]
)
react(getSystem, ['demo.snmplabs.com'])
|
