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J'utilise l'un des exemples d'opération GetNext pour une SNMPWalk de l'arborescence. J'utilise la variante asynchrone pour recueillir les OID -Erreurs getNext asynchrones lors de la sortie du tableau
# GETNEXT Command Generator
from pysnmp.entity.rfc3413.oneliner import cmdgen
from pysnmp.proto import rfc1902
# ((authData, transportTarget, varNames), ...)
targets = (
# 1-st target (SNMPv1)
(cmdgen.CommunityData('test-agent-1', 'public'),
cmdgen.UdpTransportTarget(('localhost', 161)),
(rfc1902.ObjectName((1,3,6,1,2,1)), rfc1902.ObjectName((1,3,6,1,3,1)))),
# 2-nd target (SNMPv2c)
(cmdgen.CommunityData('test-agent-2', 'public', 1),
cmdgen.UdpTransportTarget(('localhost', 161)),
(rfc1902.ObjectName((1,3,6,1,2,1,2)),)),
)
def cbFun(
sendRequestHandle, errorIndication, errorStatus, errorIndex,
varBindTable, (varBindHead, authData, transportTarget)
):
if errorIndication:
print 'SNMP engine error', errorIndication
return 1
if errorStatus:
print 'SNMP error %s at %s' % (errorStatus, errorIndex)
return 1
varBindTableRow = varBindTable[-1]
for idx in range(len(varBindTableRow)):
name, val = varBindTableRow[idx]
if val is not None and varBindHead[idx].isPrefixOf(name):
# still in table
break
else:
print 'went out of table at %s' % (name,)
return
for varBindRow in varBindTable:
for oid, val in varBindRow:
if val is None:
print oid.prettyPrint()
else:
print '%s = %s' % (oid.prettyPrint(), val.prettyPrint())
return 1 # continue table retrieval
cmdGen = cmdgen.CommandGenerator()
for authData, transportTarget, varNames in targets:
cmdGen.asyncNextCmd(
authData, transportTarget, varNames,
# User-space callback function and its context
(cbFun, (varNames, authData, transportTarget))
)
cmdGen.snmpEngine.transportDispatcher.runDispatcher()
Je reçois les OID dont j'ai besoin; Cependant, quand il sort de la table et revient de cbFun, le répartiteur dans la dernière ligne renvoie une erreur, que je ne suis pas en mesure de résoudre, la sortie ressemble -
... (some 1.3.6.1.2.1.* stuff)
1.3.6.1.2.1.2.2.1.22.1 = 0.0
1.3.6.1.2.1.2.2.1.22.2 = 0.0
1.3.6.1.2.1.2.2.1.22.3 = 0.0
went out of table at (1, 3, 6, 1, 2, 1, 3, 1, 1, 1, 2, 1, 212, 201, 49, 186)
Traceback (most recent call last):
File "asyncsnmpwalk.py", line 55, in <module>
cmdGen.snmpEngine.transportDispatcher.runDispatcher()
File "/var/lib/python-support/python2.5/pysnmp/v4/carrier/asynsock/dispatch.py", line 61, in runDispatcher
self.handleTimerTick(time())
File "/var/lib/python-support/python2.5/pysnmp/v4/carrier/base.py", line 81, in handleTimerTick
self.__timerCbFun(timeNow)
File "/var/lib/python-support/python2.5/pysnmp/v4/entity/engine.py", line 60, in __receiveTimerTickCbFun
self.msgAndPduDsp.receiveTimerTick(self, timeNow)
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/rfc3412.py", line 491, in receiveTimerTick
self.__cacheExpire(snmpEngine, self.__expireRequest)
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/rfc3412.py", line 56, in __cacheExpire
if cbFun(snmpEngine, cachedParams):
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/rfc3412.py", line 486, in __expireRequest
cbCtx
File "/var/lib/python-support/python2.5/pysnmp/v4/entity/rfc3413/cmdgen.py", line 77, in processResponsePdu
(self.processResponsePdu, (cbFun, cbCtx))
File "/var/lib/python-support/python2.5/pysnmp/v4/entity/rfc3413/cmdgen.py", line 164, in _sendPdu
(processResponsePdu, float(timeout)/100 + time.time(), cbCtx)
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/rfc3412.py", line 161, in sendPdu
sendPduHandle
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/mpmod/rfc2576.py", line 89, in prepareOutgoingMessage
scopedPDU
File "/var/lib/python-support/python2.5/pysnmp/v4/proto/secmod/rfc2576.py", line 78, in generateRequestMsg
errorIndication = 'unknownCommunityName'
pysnmp.proto.error.StatusInformation: {'errorIndication': 'unknownCommunityName'}