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import socket, string, types
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413 import cmdgen, mibvar
from pysnmp.carrier.asynsock.dgram import udp
from pysnmp.smi import view
from pysnmp import error
from pyasn1.type import univ
# Auth protocol
usmHMACMD5AuthProtocol = config.usmHMACMD5AuthProtocol
usmHMACSHAAuthProtocol = config.usmHMACSHAAuthProtocol
usmNoAuthProtocol = config.usmNoAuthProtocol
# Privacy protocol
usmDESPrivProtocol = config.usmDESPrivProtocol
usmAesCfb128Protocol = config.usmAesCfb128Protocol
usmNoPrivProtocol = config.usmNoPrivProtocol
class CommunityData:
mpModel=1 # Default is SMIv2
securityModel=mpModel+1
securityLevel='noAuthNoPriv'
def __init__(self, securityName, communityName, mpModel=None):
self.securityName = securityName
self.communityName = communityName
if mpModel is not None:
self.mpModel = mpModel
self.securityModel = mpModel + 1
self.__hash = hash((self.mpModel, self.securityModel, self.securityLevel, self.securityName, self.communityName))
def __repr__(self): return '%s("%s", <COMMUNITY>, %s)' % (
self.__class__.__name__,
self.securityName,
self.mpModel
)
def __hash__(self): return self.__hash
def __cmp__(self, other): return cmp(self.__hash, other)
class UsmUserData:
authKey = privKey = None
authProtocol = usmNoAuthProtocol
privProtocol = usmNoPrivProtocol
securityLevel='noAuthNoPriv'
securityModel=3
mpModel=2
def __init__(self, securityName,
authKey=None, privKey=None,
authProtocol=None, privProtocol=None):
self.securityName = securityName
if authKey is not None:
self.authKey = authKey
if authProtocol is None:
self.authProtocol = usmHMACMD5AuthProtocol
else:
self.authProtocol = authProtocol
if self.securityLevel != 'authPriv':
self.securityLevel = 'authNoPriv'
if privKey is not None:
self.privKey = privKey
if self.authProtocol == usmNoAuthProtocol:
raise error.PySnmpError('Privacy implies authenticity')
self.securityLevel = 'authPriv'
if privProtocol is None:
self.privProtocol = usmDESPrivProtocol
else:
self.privProtocol = privProtocol
self.__hash = hash((self.mpModel, self.securityModel, self.securityLevel, self.securityName, self.authProtocol, self.authKey, self.privProtocol, self.privKey))
def __repr__(self): return '%s("%s", <AUTHKEY>, <PRIVKEY>, %s, %s)' % (
self.__class__.__name__,
self.securityName,
self.authProtocol,
self.privProtocol
)
def __hash__(self): return self.__hash
def __cmp__(self, other): return cmp(self.__hash, other)
class UdpTransportTarget:
transportDomain = udp.domainName
def __init__(self, transportAddr, timeout=1, retries=5):
self.transportAddr = (
socket.gethostbyname(transportAddr[0]), transportAddr[1]
)
self.timeout = timeout
self.retries = retries
def __repr__(self): return '%s(("%s", %s), %s, %s)' % (
self.__class__.__name__,
self.transportAddr[0], self.transportAddr[1],
self.timeout, self.retries
)
def openClientMode(self):
self.transport = udp.UdpSocketTransport().openClientMode()
return self.transport
class AsynCommandGenerator:
_null = univ.Null('')
def __init__(self, snmpEngine=None):
if snmpEngine is None:
self.snmpEngine = engine.SnmpEngine()
else:
self.snmpEngine = snmpEngine
self.mibViewController = view.MibViewController(
self.snmpEngine.msgAndPduDsp.mibInstrumController.mibBuilder
)
self.__knownAuths = {}
self.__knownTransports = {}
self.__knownTransportAddrs = {}
def __del__(self): self.uncfgCmdGen()
def cfgCmdGen(self, authData, transportTarget, tagList=''):
paramsName = 'p-%s' % hash(authData.securityName)
if not self.__knownAuths.has_key(authData):
if isinstance(authData, CommunityData):
config.addV1System(
self.snmpEngine,
authData.securityName,
authData.communityName
)
config.addTargetParams(
self.snmpEngine, paramsName,
authData.securityName, authData.securityLevel,
authData.mpModel
)
elif isinstance(authData, UsmUserData):
config.addV3User(
self.snmpEngine,
authData.securityName,
authData.authProtocol, authData.authKey,
authData.privProtocol, authData.privKey
)
config.addTargetParams(
self.snmpEngine, paramsName,
authData.securityName, authData.securityLevel
)
else:
raise error.PySnmpError('Unsupported SNMP version')
self.__knownAuths[authData] = 1
if not self.__knownTransports.has_key(transportTarget.transportDomain):
transport = transportTarget.openClientMode()
config.addSocketTransport(
self.snmpEngine,
transportTarget.transportDomain,
transport
)
self.__knownTransports[transportTarget.transportDomain] = transport
addrName = 'a-%s' % hash((paramsName, transportTarget.transportAddr))
if not self.__knownTransportAddrs.has_key(addrName):
config.addTargetAddr(
self.snmpEngine, addrName,
transportTarget.transportDomain,
transportTarget.transportAddr,
paramsName,
transportTarget.timeout * 100,
transportTarget.retries,
tagList
)
self.__knownTransportAddrs[addrName] = 1
return addrName, paramsName
def uncfgCmdGen(self):
for authData in self.__knownAuths.keys():
paramsName = 'p-%s' % hash(authData.securityName)
if isinstance(authData, CommunityData):
config.delV1System(
self.snmpEngine,
authData.securityName
)
config.delTargetParams(
self.snmpEngine, paramsName
)
elif isinstance(authData, UsmUserData):
config.delV3User(
self.snmpEngine, authData.securityName
)
config.delTargetParams(
self.snmpEngine, paramsName
)
else:
raise error.PySnmpError('Unsupported SNMP version')
self.__knownAuths.clear()
for transportDomain, transport in self.__knownTransports.items():
config.delSocketTransport(
self.snmpEngine, transportDomain
)
transport.closeTransport()
self.__knownTransports.clear()
for addrName in self.__knownTransportAddrs.keys():
config.delTargetAddr(
self.snmpEngine, addrName
)
self.__knownTransportAddrs.clear()
# Async SNMP apps
def asyncGetCmd(
self, authData, transportTarget, varNames, (cbFun, cbCtx)
):
addrName, paramsName = self.cfgCmdGen(
authData, transportTarget
)
varBinds = []
for varName in varNames:
name, oid = mibvar.mibNameToOid(
self.mibViewController, varName
)
varBinds.append((name + oid, self._null))
return cmdgen.GetCommandGenerator().sendReq(
self.snmpEngine, addrName, varBinds, cbFun, cbCtx
)
def asyncSetCmd(
self, authData, transportTarget, varBinds, (cbFun, cbCtx)
):
addrName, paramsName = self.cfgCmdGen(
authData, transportTarget
)
__varBinds = []
for varName, varVal in varBinds:
name, oid = mibvar.mibNameToOid(
self.mibViewController, varName
)
if not type(varVal) == types.InstanceType:
((symName, modName), suffix) = mibvar.oidToMibName(
self.mibViewController, name + oid
)
syntax = mibvar.cloneFromMibValue(
self.mibViewController, modName, symName, varVal
)
if syntax is None:
raise error.PySnmpError(
'Value type MIB lookup failed for %s' % repr(varName)
)
varVal = syntax.clone(varVal)
__varBinds.append((name + oid, varVal))
return cmdgen.SetCommandGenerator().sendReq(
self.snmpEngine, addrName, __varBinds, cbFun, cbCtx
)
def asyncNextCmd(
self, authData, transportTarget, varNames, (cbFun, cbCtx)
):
addrName, paramsName = self.cfgCmdGen(
authData, transportTarget
)
varBinds = []
for varName in varNames:
name, oid = mibvar.mibNameToOid(
self.mibViewController, varName
)
varBinds.append((name + oid, self._null))
return cmdgen.NextCommandGenerator().sendReq(
self.snmpEngine, addrName, varBinds, cbFun, cbCtx
)
def asyncBulkCmd(
self, authData, transportTarget, nonRepeaters, maxRepetitions,
varNames, (cbFun, cbCtx)
):
addrName, paramsName = self.cfgCmdGen(
authData, transportTarget
)
varBinds = []
for varName in varNames:
name, oid = mibvar.mibNameToOid(
self.mibViewController, varName
)
varBinds.append((name + oid, self._null))
return cmdgen.BulkCommandGenerator().sendReq(
self.snmpEngine, addrName, nonRepeaters, maxRepetitions,
varBinds, cbFun, cbCtx
)
class CommandGenerator(AsynCommandGenerator):
def getCmd(self, authData, transportTarget, *varNames):
def __cbFun(
sendRequestHandle, errorIndication, errorStatus, errorIndex,
varBinds, appReturn
):
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBinds'] = varBinds
appReturn = {}
self.asyncGetCmd(
authData, transportTarget, varNames, (__cbFun, appReturn)
)
self.snmpEngine.transportDispatcher.runDispatcher()
return (
appReturn['errorIndication'],
appReturn['errorStatus'],
appReturn['errorIndex'],
appReturn['varBinds']
)
def setCmd(self, authData, transportTarget, *varBinds):
def __cbFun(
sendRequestHandle, errorIndication, errorStatus, errorIndex,
varBinds, appReturn
):
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBinds'] = varBinds
appReturn = {}
self.asyncSetCmd(
authData, transportTarget, varBinds, (__cbFun, appReturn)
)
self.snmpEngine.transportDispatcher.runDispatcher()
return (
appReturn['errorIndication'],
appReturn['errorStatus'],
appReturn['errorIndex'],
appReturn['varBinds']
)
def nextCmd(self, authData, transportTarget, *varNames):
def __cbFun(
sendRequestHandle, errorIndication, errorStatus, errorIndex,
varBindTable, (varBindHead, varBindTotalTable, appReturn)
):
if errorIndication or errorStatus:
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBindTable'] = varBindTable
return
else:
varBindTableRow = varBindTable[-1]
for idx in range(len(varBindTableRow)):
name, val = varBindTableRow[idx]
# XXX extra rows
if val is not None and varBindHead[idx].isPrefixOf(name):
break
else:
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBindTable'] = varBindTotalTable
return
varBindTotalTable.extend(varBindTable)
return 1 # continue table retrieval
varBindHead = map(lambda (x,y): univ.ObjectIdentifier(x+y), map(lambda x,self=self: mibvar.mibNameToOid(self.mibViewController, x), varNames))
appReturn = {}
self.asyncNextCmd(
authData, transportTarget, varNames,
(__cbFun, (varBindHead,[],appReturn))
)
self.snmpEngine.transportDispatcher.runDispatcher()
return (
appReturn['errorIndication'],
appReturn['errorStatus'],
appReturn['errorIndex'],
appReturn['varBindTable']
)
def bulkCmd(self, authData, transportTarget,
nonRepeaters, maxRepetitions, *varNames):
def __cbFun(
sendRequestHandle, errorIndication, errorStatus, errorIndex,
varBindTable, (varBindHead, varBindTotalTable, appReturn)
):
if errorIndication or errorStatus:
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBindTable'] = varBindTable
return
else:
varBindTotalTable.extend(varBindTable) # XXX out of table
# rows possible
varBindTableRow = varBindTable[-1]
for idx in range(len(varBindTableRow)):
name, val = varBindTableRow[idx]
if val is not None and varBindHead[idx].isPrefixOf(name):
break
else:
appReturn['errorIndication'] = errorIndication
appReturn['errorStatus'] = errorStatus
appReturn['errorIndex'] = errorIndex
appReturn['varBindTable'] = varBindTotalTable
return
return 1 # continue table retrieval
varBindHead = map(lambda (x,y): univ.ObjectIdentifier(x+y), map(lambda x,self=self: mibvar.mibNameToOid(self.mibViewController, x), varNames))
appReturn = {}
self.asyncBulkCmd(
authData, transportTarget, nonRepeaters, maxRepetitions,
varNames, (__cbFun, (varBindHead, [], appReturn))
)
self.snmpEngine.transportDispatcher.runDispatcher()
return (
appReturn['errorIndication'],
appReturn['errorStatus'],
appReturn['errorIndex'],
appReturn['varBindTable']
)
|
