1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
from pysnmp.entity import config
from pysnmp import nextid, error
from pysnmp.hlapi.auth import *
__all__ = ['CommandGeneratorLcdConfigurator',
'NotificationOriginatorLcdConfigurator' ]
class AbstractLcdConfigurator:
nextID = nextid.Integer(0xffffffff)
def _getCache(self, snmpEngine):
cache = snmpEngine.getUserContext(self.__class__.__name__)
if cache is None:
cache = {
'auth': {}, 'parm': {}, 'tran': {}, 'addr': {}
}
snmpEngine.setUserContext(cmdgen_cache=cache)
return cache
def configure(self, snmpEngine, authData, transportTarget): pass
def unconfigure(self, snmpEngine, authData=None): pass
class CommandGeneratorLcdConfigurator(AbstractLcdConfigurator):
def configure(self, snmpEngine, authData, transportTarget):
cache = self._getCache(snmpEngine)
if isinstance(authData, CommunityData):
if authData.communityIndex not in cache['auth']:
config.addV1System(
snmpEngine,
authData.communityIndex,
authData.communityName,
authData.contextEngineId,
authData.contextName,
authData.tag,
authData.securityName
)
cache['auth'][authData.communityIndex] = authData
elif isinstance(authData, UsmUserData):
authDataKey = authData.userName, authData.securityEngineId
if authDataKey not in cache['auth']:
config.addV3User(
snmpEngine,
authData.userName,
authData.authProtocol, authData.authKey,
authData.privProtocol, authData.privKey,
authData.securityEngineId,
securityName=authData.securityName
)
cache['auth'][authDataKey] = authData
else:
raise error.PySnmpError('Unsupported authentication object')
paramsKey = authData.securityName, \
authData.securityLevel, \
authData.mpModel
if paramsKey in cache['parm']:
paramsName, useCount = cache['parm'][paramsKey]
cache['parm'][paramsKey] = paramsName, useCount + 1
else:
paramsName = 'p%s' % self.nextID()
config.addTargetParams(
snmpEngine, paramsName,
authData.securityName, authData.securityLevel, authData.mpModel
)
cache['parm'][paramsKey] = paramsName, 1
if transportTarget.transportDomain in cache['tran']:
transport, useCount = cache['tran'][transportTarget.transportDomain]
transportTarget.verifyDispatcherCompatibility(snmpEngine)
cache['tran'][transportTarget.transportDomain] = transport, useCount + 1
elif config.getTransport(snmpEngine, transportTarget.transportDomain):
transportTarget.verifyDispatcherCompatibility(snmpEngine)
else:
transport = transportTarget.openClientMode()
config.addTransport(
snmpEngine,
transportTarget.transportDomain,
transport
)
cache['tran'][transportTarget.transportDomain] = transport, 1
transportKey = ( paramsName,
transportTarget.transportDomain,
transportTarget.transportAddr,
transportTarget.tagList )
if transportKey in cache['addr']:
addrName, useCount = cache['addr'][transportKey]
cache['addr'][transportKey] = addrName, useCount + 1
else:
addrName = 'a%s' % self.nextID()
config.addTargetAddr(
snmpEngine, addrName,
transportTarget.transportDomain,
transportTarget.transportAddr,
paramsName,
transportTarget.timeout * 100,
transportTarget.retries,
transportTarget.tagList
)
cache['addr'][transportKey] = addrName, 1
return addrName, paramsName
def unconfigure(self, snmpEngine, authData=None):
cache = _getCache(snmpEngine)
if authData:
if isinstance(authData, CommunityData):
authDataKey = authData.communityIndex
elif isinstance(authData, UsmUserData):
authDataKey = authData.userName, authData.securityEngineId
else:
raise error.PySnmpError('Unsupported authentication object')
if authDataKey in cache['auth']:
authDataKeys = ( authDataKey, )
else:
raise error.PySnmpError('Unknown authData %s' % (authData,))
else:
authDataKeys = list(cache['auth'].keys())
addrNames, paramsNames = set(), set()
for authDataKey in authDataKeys:
authDataX = cache['auth'][authDataKey]
del cache['auth'][authDataKey]
if isinstance(authDataX, CommunityData):
config.delV1System(
snmpEngine,
authDataX.communityIndex
)
elif isinstance(authDataX, UsmUserData):
config.delV3User(
snmpEngine,
authDataX.userName,
authDataX.securityEngineId
)
else:
raise error.PySnmpError('Unsupported authentication object')
paramsKey = authDataX.securityName, \
authDataX.securityLevel, \
authDataX.mpModel
if paramsKey in cache['parm']:
paramsName, useCount = cache['parm'][paramsKey]
useCount -= 1
if useCount:
cache['parm'][paramsKey] = paramsName, useCount
else:
del cache['parm'][paramsKey]
config.delTargetParams(
snmpEngine, paramsName
)
paramsNames.add(paramsName)
else:
raise error.PySnmpError('Unknown target %s' % (paramsKey,))
addrKeys = [ x for x in cache['addr'] if x[0] == paramsName ]
for addrKey in addrKeys:
addrName, useCount = cache['addr'][addrKey]
useCount -= 1
if useCount:
cache['addr'][addrKey] = addrName, useCount
else:
config.delTargetAddr(snmpEngine, addrName)
addrNames.add(addrKey)
if addrKey[1] in cache['tran']:
transport, useCount = cache['tran'][addrKey[1]]
if useCount > 1:
useCount -= 1
cache['tran'][addrKey[1]] = transport, useCount
else:
config.delTransport(snmpEngine, addrKey[1])
transport.closeTransport()
del cache['tran'][addrKey[1]]
return addrNames, paramsNames
class NotificationOriginatorLcdConfigurator(CommandGeneratorLcdConfigurator):
def configure(self, snmpEngine, authData, transportTarget, notifyType):
cache = self._getCache(snmpEngine)
addrName, paramsName = CommandGeneratorLcdConfigurator.configure(self, snmpEngine, authData, transportTarget)
tagList = transportTarget.tagList.split()
if not tagList:
tagList = ['']
for tag in tagList:
notifyNameKey = paramsName, tag, notifyType
if notifyNameKey in cache['name']:
notifyName, paramsName, useCount = cache['name'][notifyNameKey]
cache['name'][notifyNameKey] = notifyName, paramsName, useCount + 1
else:
notifyName = 'n%s' % self.nextID()
config.addNotificationTarget(
snmpEngine,
notifyName,
paramsName,
tag,
notifyType
)
cache['name'][notifyNameKey] = notifyName, paramsName, 1
authDataKey = authData.securityName, authData.securityModel
if authDataKey in cache['auth']:
authDataX, subTree, useCount = cache['auth'][authDataKey]
cache['auth'][authDataKey] = authDataX, subTree, useCount + 1
else:
subTree = (1,3,6)
config.addTrapUser(
snmpEngine,
authData.securityModel,
authData.securityName,
authData.securityLevel,
subTree
)
cache['auth'][authDataKey] = authData, subTree, 1
return notifyName
def unconfigure(self, snmpEngine, authData=None):
cache = _getCache(snmpEngine)
if authData:
authDataKey = authData.securityName, authData.securityModel
if authDataKey in cache['auth']:
authDataKeys = ( authDataKey, )
else:
raise error.PySnmpError('Unknown authData %s' % (authData,))
else:
authDataKeys = tuple(cache['auth'].keys())
addrNames, paramsNames = CommandGeneratorLcdConfigurator.unconfigure(self, snmpEngine, authData)
notifyAndParamsNames = [ (cache['name'][x], x) for x in cache['name'].keys() if x[0] in paramsNames ]
for (notifyName, paramsName, useCount), notifyNameKey in notifyAndParamsNames:
useCount -= 1
if useCount:
cache['name'][notifyNameKey] = notifyName, paramsName, useCount
else:
config.delNotificationTarget(
snmpEngine, notifyName, paramsName
)
del cache['name'][notifyNameKey]
for authDataKey in authDataKeys:
authDataX, subTree, useCount = cache['auth'][authDataKey]
useCount -= 1
if useCount:
cache['auth'][authDataKey] = authDataX, subTree, useCount
else:
config.delTrapUser(
snmpEngine,
authDataX.securityModel,
authDataX.securityName,
authDataX.securityLevel,
subTree
)
del cache['auth'][authDataKey]
|
