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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 multiple Agents at demo.snmplabs.com
* for instance of SNMPv2-MIB::sysDescr.0 MIB object
* based on asyncio I/O framework
Functionally similar to:
| $ snmpget -v2c -c public demo.snmplabs.com:1161 SNMPv2-MIB::sysDescr.0
| $ snmpget -v2c -c public demo.snmplabs.com:2161 SNMPv2-MIB::sysDescr.0
| $ snmpget -v2c -c public demo.snmplabs.com:3161 SNMPv2-MIB::sysDescr.0
"""#
import asyncio
from pysnmp.hlapi.asyncio import *
@asyncio.coroutine
def getone(snmpEngine, hostname):
errorIndication, errorStatus, errorIndex, varBinds = yield from getCmd(
snmpEngine,
CommunityData('public'),
UdpTransportTarget(hostname),
ContextData(),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0))
)
if errorIndication:
print(errorIndication)
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex) - 1][0] or '?'
)
)
else:
for varBind in varBinds:
print(' = '.join([x.prettyPrint() for x in varBind]))
snmpEngine = SnmpEngine()
loop = asyncio.get_event_loop()
# run parallel queries
loop.run_until_complete(
asyncio.wait([getone(snmpEngine, ('demo.snmplabs.com', 1161)),
getone(snmpEngine, ('demo.snmplabs.com', 2161)),
getone(snmpEngine, ('demo.snmplabs.com', 3161))])
)
# unconfigure SNMP engine
loop.run_until_complete(unconfigureCmdGen(snmpEngine))
|
