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"""
Walk multiple Agents at once
++++++++++++++++++++++++++++
Iterate over MIBs of multiple SNMP Agents asynchronously using the
following options:
* 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 multiple MIB subtrees and tables
"""#
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('1.3.6.1.2.1')),
ObjectType(ObjectIdentity('1.3.6.1.3.1')) ) ),
# 2-nd target (SNMPv2c over IPv4/UDP)
( CommunityData('public'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
( ObjectType(ObjectIdentity('1.3.6.1.4.1')), ) ),
# 3-nd target (SNMPv3 over IPv4/UDP)
( UsmUserData('usr-md5-des', 'authkey1', 'privkey1'),
UdpTransportTarget(('demo.snmplabs.com', 161)),
( ObjectType(ObjectIdentity('SNMPv2-MIB', 'system')), ) ),
# 4-th target (SNMPv3 over IPv6/UDP)
( UsmUserData('usr-md5-none', 'authkey1'),
Udp6TransportTarget(('::1', 161)),
( ObjectType(ObjectIdentity('IF-MIB', 'ifTable')), ) )
# N-th target
# ...
)
# Wait for responses or errors, submit GETNEXT requests for further OIDs
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
errorStatus, errorIndex, varBindTable, cbCtx):
(varBindHead, authData, transportTarget) = cbCtx
print('%s via %s' % (authData, transportTarget))
if errorIndication:
print(errorIndication)
return
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBindTable[-1][int(errorIndex)-1][0] or '?'
)
)
return
else:
for idx, varBind in enumerate(varBindTable[-1]):
if varBind[1] is not None and varBindHead[idx] <= varBind[0]:
break # still in table
else:
print('went out of table at %s' % (name, ))
return
for varBindRow in varBindTable:
for varBind in varBindRow:
print(' = '.join([ x.prettyPrint() for x in varBind ]))
return True # continue table retrieval
snmpEngine = SnmpEngine()
cmdGen = AsyncCommandGenerator()
# Submit initial GETNEXT requests and wait for responses
for authData, transportTarget, varBinds in targets:
varBindHead = [ x[0] for x in cmdGen.makeVarBinds(snmpEngine, varBinds ) ]
cmdGen.nextCmd(
snmpEngine, authData, transportTarget, ContextData(), varBinds,
# User-space callback function and its context
(cbFun, (varBindHead, authData, transportTarget))
)
snmpEngine.transportDispatcher.runDispatcher()
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