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#
# This file is part of snmpsim software.
#
# Copyright (c) 2010-2019, Ilya Etingof <etingof@gmail.com>
# License: http://snmplabs.com/snmpsim/license.html
#
# Managed value variation module
# Send SNMP Notification
#
from pysnmp.hlapi.asyncore import *
from snmpsim.grammar.snmprec import SnmprecGrammar
from snmpsim.record.snmprec import SnmprecRecord
from snmpsim.mltsplit import split
from snmpsim import error, log
def init(**context):
pass
typeMap = {
's': OctetString,
'h': lambda x: OctetString(hexValue=x),
'i': Integer32,
'o': ObjectIdentifier,
'a': IpAddress,
'u': Unsigned32,
'g': Gauge32,
't': TimeTicks,
'b': Bits,
'I': Counter64
}
def _cbFun(sendRequestHandle,
errorIndication,
errorStatus, errorIndex,
varBinds,
cbCtx):
oid, value = cbCtx
if errorIndication or errorStatus:
log.msg('notification: for %s=%r failed with errorIndication %s, errorStatus %s' % (oid, value, errorIndication, errorStatus))
def variate(oid, tag, value, **context):
if 'snmpEngine' in context and context['snmpEngine']:
snmpEngine = context['snmpEngine']
if snmpEngine not in moduleContext:
moduleContext[snmpEngine] = {}
if context['transportDomain'] not in moduleContext[snmpEngine]:
# register this SNMP Engine to handle our transports'
# receiver IDs (which we build by outbound and simulator
# transportDomains concatenation)
snmpEngine.registerTransportDispatcher(
snmpEngine.transportDispatcher,
UdpTransportTarget.transportDomain + context['transportDomain']
)
snmpEngine.registerTransportDispatcher(
snmpEngine.transportDispatcher,
Udp6TransportTarget.transportDomain + context['transportDomain']
)
moduleContext[snmpEngine][context['transportDomain']] = 1
else:
raise error.SnmpsimError('variation module not given snmpEngine')
if not context['nextFlag'] and not context['exactMatch']:
return context['origOid'], tag, context['errorStatus']
if 'settings' not in recordContext:
recordContext['settings'] = dict([split(x, '=') for x in split(value, ',')])
for k, v in (('op', 'set'),
('community', 'public'),
('authkey', None),
('authproto', 'md5'),
('privkey', None),
('privproto', 'des'),
('proto', 'udp'),
('port', '162'),
('ntftype', 'trap'),
('trapoid', '1.3.6.1.6.3.1.1.5.1')):
recordContext['settings'].setdefault(k, v)
if 'hexvalue' in recordContext['settings']:
recordContext['settings']['value'] = [int(recordContext['settings']['hexvalue'][x:x + 2], 16) for x in
range(0, len(recordContext['settings']['hexvalue']), 2)]
if 'vlist' in recordContext['settings']:
vlist = {}
recordContext['settings']['vlist'] = split(recordContext['settings']['vlist'], ':')
while recordContext['settings']['vlist']:
o, v = recordContext['settings']['vlist'][:2]
recordContext['settings']['vlist'] = recordContext['settings']['vlist'][2:]
typeTag, _ = SnmprecRecord.unpackTag(tag)
v = SnmprecGrammar.tagMap[typeTag](v)
if o not in vlist:
vlist[o] = set()
if o == 'eq':
vlist[o].add(v)
elif o in ('lt', 'gt'):
vlist[o] = v
else:
log.msg('notification: bad vlist syntax: %s' % recordContext['settings']['vlist'])
recordContext['settings']['vlist'] = vlist
args = recordContext['settings']
if context['setFlag'] and 'vlist' in args:
if ('eq' in args['vlist'] and
context['origValue'] in args['vlist']['eq']):
pass
elif ('lt' in args['vlist'] and
context['origValue'] < args['vlist']['lt']):
pass
elif ('gt' in args['vlist'] and
context['origValue'] > args['vlist']['gt']):
pass
else:
return oid, tag, context['origValue']
if args['op'] not in ('get', 'set', 'any', '*'):
log.msg('notification: unknown SNMP request type configured: %s' % args['op'])
return context['origOid'], tag, context['errorStatus']
if (args['op'] == 'get' and not context['setFlag'] or
args['op'] == 'set' and context['setFlag'] or
args['op'] in ('any', '*')):
if args['version'] in ('1', '2c'):
authData = CommunityData(args['community'], mpModel=args['version'] == '2c' and 1 or 0)
elif args['version'] == '3':
if args['authproto'] == 'md5':
authProtocol = usmHMACMD5AuthProtocol
elif args['authproto'] == 'sha':
authProtocol = usmHMACSHAAuthProtocol
elif args['authproto'] == 'none':
authProtocol = usmNoAuthProtocol
else:
log.msg('notification: unknown auth proto %s' % args['authproto'])
return context['origOid'], tag, context['errorStatus']
if args['privproto'] == 'des':
privProtocol = usmDESPrivProtocol
elif args['privproto'] == 'aes':
privProtocol = usmAesCfb128Protocol
elif args['privproto'] == 'none':
privProtocol = usmNoPrivProtocol
else:
log.msg('notification: unknown privacy proto %s' % args['privproto'])
return context['origOid'], tag, context['errorStatus']
authData = UsmUserData(args['user'], args['authkey'], args['privkey'], authProtocol=authProtocol,
privProtocol=privProtocol)
else:
log.msg('notification: unknown SNMP version %s' % args['version'])
return context['origOid'], tag, context['errorStatus']
if 'host' not in args:
log.msg('notification: target hostname not configured for OID %s' % (oid,))
return context['origOid'], tag, context['errorStatus']
if args['proto'] == 'udp':
target = UdpTransportTarget((args['host'], int(args['port'])))
elif args['proto'] == 'udp6':
target = Udp6TransportTarget((args['host'], int(args['port'])))
else:
log.msg('notification: unknown transport %s' % args['proto'])
return context['origOid'], tag, context['errorStatus']
localAddress = None
if 'bindaddr' in args:
localAddress = args['bindaddr']
else:
if context['transportDomain'][:len(target.transportDomain)] == target.transportDomain:
localAddress = snmpEngine.transportDispatcher.getTransport(context['transportDomain']).getLocalAddress()[0]
else:
log.msg('notification: incompatible network transport types used by CommandResponder vs NotificationOriginator')
if 'bindaddr' in args:
localAddress = args['bindaddr']
if localAddress:
log.msg('notification: binding to local address %s' % localAddress)
target.setLocalAddress((localAddress, 0))
# this will make target objects different based on their bind address
target.transportDomain = target.transportDomain + context['transportDomain']
varBinds = []
if 'uptime' in args:
varBinds.append(
(ObjectIdentifier('1.3.6.1.2.1.1.3.0'),
TimeTicks(args['uptime']))
)
if args['version'] == '1':
if 'agentaddress' in args:
varBinds.append(
(ObjectIdentifier('1.3.6.1.6.3.18.1.3.0'),
IpAddress(args['agentaddress']))
)
if 'enterprise' in args:
varBinds.append(
(ObjectIdentifier('1.3.6.1.6.3.1.1.4.3.0'),
ObjectIdentifier(args['enterprise']))
)
if 'varbinds' in args:
vbs = split(args['varbinds'], ':')
while vbs:
varBinds.append(
(ObjectIdentifier(vbs[0]), typeMap[vbs[1]](vbs[2]))
)
vbs = vbs[3:]
sendNotification(
snmpEngine, authData, target, ContextData(), args['ntftype'],
NotificationType(ObjectIdentity(args['trapoid'])).addVarBinds(*varBinds),
cbFun=_cbFun, cbCtx=(oid, value)
)
log.msg('notification: sending Notification to %s with credentials %s' % (authData, target))
if context['setFlag'] or 'value' not in args:
return oid, tag, context['origValue']
else:
return oid, tag, args['value']
def shutdown(**context):
pass
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