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"""
Multiple concurrent queries
+++++++++++++++++++++++++++
Send a bunch of different SNMP GET requests to different peers all at once,
wait for responses asynchronously:
* with SNMPv1, community 'public' and
with SNMPv2c, community 'public' and
with SNMPv3, user 'usr-md5-des', MD5 auth and DES privacy
* over IPv4/UDP and
over IPv6/UDP
* to an Agent at demo.snmplabs.com:161 and
to an Agent at [::1]:161
* for instances of SNMPv2-MIB::sysDescr.0 and
SNMPv2-MIB::sysLocation.0 MIB objects
"""#
from pysnmp.entity.rfc3413.oneliner.cmdgen import *
# List of targets in the followin format:
# ( ( authData, transportTarget, varNames ), ... )
targets = (
# 1-st target (SNMPv1 over IPv4/UDP)
( CommunityData('public', mpModel=0),
UdpTransportTarget(('demo.snmplabs.com', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) )) ),
# 2-nd target (SNMPv2c over IPv4/UDP)
( CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) )) ),
# 3-nd target (SNMPv2c over IPv4/UDP) - same community and
# different transport address.
( CommunityData('public'),
UdpTransportTarget(('localhost', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysContact', 0)),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysName', 0))) ),
# 4-nd target (SNMPv3 over IPv4/UDP)
( UsmUserData('usr-md5-des', 'authkey1', 'privkey1'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) )) ),
# 5-th target (SNMPv3 over IPv6/UDP)
( UsmUserData('usr-md5-none', 'authkey1'),
Udp6TransportTarget(('::1', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0)),
ObjectType(ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) )) ),
# N-th target
# ...
)
# Wait for responses or errors
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
errorStatus, errorIndex, varBinds, cbCtx):
authData, transportTarget = cbCtx
print('%s via %s' % (authData, transportTarget))
if errorIndication:
print(errorIndication)
return True
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex)-1][0] or '?'
)
)
return True
else:
for varBind in varBinds:
print(' = '.join([ x.prettyPrint() for x in varBind ]))
snmpEngine = SnmpEngine()
cmdGen = AsyncCommandGenerator()
# Submit GET requests
for authData, transportTarget, varNames in targets:
cmdGen.getCmd(
snmpEngine, authData, transportTarget, ContextData(), varNames,
# User-space callback function and its context
(cbFun, (authData, transportTarget))
)
snmpEngine.transportDispatcher.runDispatcher()
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