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import time
from pysnmp.entity.rfc3413 import config
from pysnmp.proto.proxy import rfc2576
from pysnmp.proto.api import v2c
from pysnmp.smi import error
vacmID = 3
class NotificationOriginator:
def __init__(self, snmpContext):
self.__pendingReqs = {}
self.__sendRequestHandleSource = 0L
self.__context = snmpContext
def processResponsePdu(
self,
snmpEngine,
messageProcessingModel,
securityModel,
securityName,
securityLevel,
contextEngineId,
contextName,
pduVersion,
PDU,
statusInformation,
sendPduHandle,
cbData
):
# 3.3.6d
( origTransportDomain,
origTransportAddress,
origMessageProcessingModel,
origSecurityModel,
origSecurityName,
origSecurityLevel,
origContextEngineId,
origContextName,
origPduVersion,
origPdu,
origTimeout,
origRetryCount,
origRetries,
origSendRequestHandle
) = self.__pendingReqs[sendPduHandle]
del self.__pendingReqs[sendPduHandle]
snmpEngine.transportDispatcher.jobFinished(id(self))
if statusInformation and origRetries != origRetryCount:
# 3.3.6a
sendPduHandle = snmpEngine.msgAndPduDsp.sendPdu(
snmpEngine,
origTransportDomain,
origTransportAddress,
origMessageProcessingModel,
origSecurityModel,
origSecurityName,
origSecurityLevel,
origContextEngineId,
origContextName,
origPduVersion,
origPdu,
(self.processResponsePdu, origTimeout/1000 + time.time(), None)
)
snmpEngine.transportDispatcher.jobStarted(id(self))
# 3.3.6b
self.__pendingReqs[sendPduHandle] = (
origTransportDomain,
origTransportAddress,
origMessageProcessingModel,
origSecurityModel,
origSecurityName,
origSecurityLevel,
origContextEngineId,
origContextName,
origPduVersion,
origPdu,
origTimeout,
origRetryCount,
origRetries + 1,
sendPduHandle
)
return
# 3.3.6c
pass
def sendNotification(
self,
snmpEngine,
notificationTarget,
notificationName,
additionalVarBinds=None,
contextName=''
):
# 3.3
( notifyTag,
notifyType ) = config.getNotificationInfo(
snmpEngine, notificationTarget
)
contextMibInstrumCtl = self.__context.getMibInstrum(
contextName
)
for targetAddrName in config.getTargetNames(snmpEngine, notifyTag):
( transportDomain,
transportAddress,
timeout,
retryCount,
params ) = config.getTargetAddr(snmpEngine, targetAddrName)
( messageProcessingModel,
securityModel,
securityName,
securityLevel ) = config.getTargetParams(snmpEngine, params)
# 3.3.1 XXX
# XXX filtering's yet to be implemented
# filterProfileName = config.getNotifyFilterProfile(params)
# ( filterSubtree,
# filterMask,
# filterType ) = config.getNotifyFilter(filterProfileName)
varBinds = []
# 3.3.2 & 3.3.3
sysUpTime, = contextMibInstrumCtl.mibBuilder.importSymbols(
'SNMPv2-MIB', 'sysUpTime'
)
varBinds.append((sysUpTime.name + (0,), sysUpTime.syntax))
snmpTrapOid, = contextMibInstrumCtl.mibBuilder.importSymbols(
'SNMPv2-MIB', 'snmpTrapOID'
)
snmpTrapVal, = apply(
contextMibInstrumCtl.mibBuilder.importSymbols,
notificationName
)
varBinds.append(
(snmpTrapOid.name + (0,), v2c.ObjectIdentifier(snmpTrapVal.name))
)
# Get notification objects names
for notificationObject in snmpTrapVal.getObjects():
mibNode, = contextMibInstrumCtl.mibBuilder.importSymbols(
notificationObject #, mibNode.moduleName # XXX
)
varBinds.append((mibNode.name + (0,), mibNode.syntax))
if additionalVarBinds:
varBinds.extend(additionalVarBinds)
for varName, varVal in varBinds:
try:
snmpEngine.accessControlModel[vacmID].isAccessAllowed(
snmpEngine, securityModel, securityName,
securityLevel, 'notify', contextName, varName
)
except error.SmiError:
return
# 3.3.4
if notifyType == 1:
pdu = v2c.SNMPv2TrapPDU()
elif notifyType == 2:
pdu = v2c.InformRequestPDU()
else:
raise RuntimeError()
v2c.apiPDU.setDefaults(pdu)
v2c.apiPDU.setVarBinds(pdu, varBinds)
# User-side API assumes SMIv2
if messageProcessingModel == 0:
pdu = rfc2576.v2ToV1(pdu)
pduVersion = 0
else:
pduVersion = 1
# 3.3.5
if notifyType == 1:
snmpEngine.msgAndPduDsp.sendPdu(
snmpEngine,
transportDomain,
transportAddress,
messageProcessingModel,
securityModel,
securityName,
securityLevel,
self.__context.contextEngineId,
contextName,
pduVersion,
pdu,
None
)
else:
# 3.3.6a
sendPduHandle = snmpEngine.msgAndPduDsp.sendPdu(
snmpEngine,
transportDomain,
transportAddress,
messageProcessingModel,
securityModel,
securityName,
securityLevel,
self.__context.contextEngineId,
contextName,
pduVersion,
pdu,
(self.processResponsePdu, timeout/1000 + time.time(), None)
)
# 3.3.6b
self.__pendingReqs[sendPduHandle] = (
transportDomain,
transportAddress,
messageProcessingModel,
securityModel,
securityName,
securityLevel,
self.__context.contextEngineId,
contextName,
pduVersion,
pdu,
timeout,
retryCount,
1,
self.__sendRequestHandleSource
)
snmpEngine.transportDispatcher.jobStarted(id(self))
# XXX
# move/group/implement config setting/retrieval at a stand-alone module
|
