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"""
Agent operations on MIB
+++++++++++++++++++++++
This script explains how SNMP Agent application manipulates
its MIB possibly triggered by SNMP Manager's commands.
"""#
from pysnmp.smi import builder
from pysnmp.smi import instrum
from pysnmp.smi import exval
from pysnmp.smi import error
from pysnmp import debug
#debug.setLogger(debug.Debug('all'))
def walkMib():
def cbFun(varBinds, **context):
err = context.get('error')
if err:
print(err)
for oid, val in varBinds:
if exval.endOfMib.isSameTypeWith(val):
context['app']['stop'] = True
elif not (exval.noSuchInstance.isSameTypeWith(val) or
exval.noSuchObject.isSameTypeWith(val)):
print('%s = %s' % ('.'.join([str(x) for x in oid]),
not val.isValue and 'N/A' or val.prettyPrint()))
context['app']['varBinds'] = varBinds
app_context = {
'varBinds': [((1, 3, 6), None)],
'stop': False
}
print('Read whole MIB (table walk)')
while not app_context['stop']:
mibInstrum.readNextMibObjects(*app_context['varBinds'], cbFun=cbFun, app=app_context)
print('Loading MIB modules...')
mibBuilder = builder.MibBuilder().loadModules(
'SNMPv2-MIB', 'SNMP-FRAMEWORK-MIB', 'SNMP-COMMUNITY-MIB'
)
print('Building MIB tree...')
mibInstrum = instrum.MibInstrumController(mibBuilder)
walkMib()
print('Building table entry index from human-friendly representation...')
snmpCommunityEntry, = mibBuilder.importSymbols(
'SNMP-COMMUNITY-MIB', 'snmpCommunityEntry'
)
instanceId = snmpCommunityEntry.getInstIdFromIndices('my-router')
print('Create/update some of SNMP-COMMUNITY-MIB::snmpCommunityEntry table columns: ')
def cbFun(varBinds, **context):
err = context.get('error')
if err:
print(err)
for oid, val in varBinds:
print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
mibInstrum.writeMibObjects(
(snmpCommunityEntry.name + (2,) + instanceId, 'mycomm'),
(snmpCommunityEntry.name + (3,) + instanceId, 'mynmsname'),
(snmpCommunityEntry.name + (7,) + instanceId, 'volatile'),
cbFun=cbFun
)
walkMib()
def cbFun(varBinds, **context):
err = context.get('error')
if err:
print(err)
for oid, val in varBinds:
print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
print('Destroy SNMP-COMMUNITY-MIB::snmpCommunityEntry table row via RowStatus column: ')
mibInstrum.writeMibObjects(
(snmpCommunityEntry.name + (8,) + instanceId, 'destroy'),
cbFun=cbFun
)
walkMib()
def cbFun(varBinds, **context):
err = context.get('errors', None)
if err:
print(err)
for oid, val in varBinds:
print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
print('Create SNMP-COMMUNITY-MIB::snmpCommunityEntry table row: ')
mibInstrum.writeMibObjects(
(snmpCommunityEntry.name + (1,) + instanceId, 'mycomm'),
(snmpCommunityEntry.name + (2,) + instanceId, 'mycomm'),
(snmpCommunityEntry.name + (3,) + instanceId, 'mysecname'),
(snmpCommunityEntry.name + (4,) + instanceId, 'abcdef'),
(snmpCommunityEntry.name + (5,) + instanceId, ''),
(snmpCommunityEntry.name + (6,) + instanceId, 'mytag'),
(snmpCommunityEntry.name + (7,) + instanceId, 'nonVolatile'),
(snmpCommunityEntry.name + (8,) + instanceId, 'createAndGo'),
cbFun=cbFun
)
walkMib()
print('Destroy SNMP-COMMUNITY-MIB::snmpCommunityEntry table row via RowStatus column: ')
mibInstrum.writeMibObjects(
(snmpCommunityEntry.name + (8,) + instanceId, 'destroy'),
cbFun=cbFun
)
walkMib()
print('Unloading MIB modules...'),
mibBuilder.unloadModules()
|
