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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.
"""#
# SNMP agent backend e.g. Agent access to Managed Objects
from pysnmp.smi import builder, instrum, exval
print('Loading MIB modules...'),
mibBuilder = builder.MibBuilder().loadModules(
'SNMPv2-MIB', 'SNMP-FRAMEWORK-MIB', 'SNMP-COMMUNITY-MIB'
)
print('done')
print('Building MIB tree...'),
mibInstrum = instrum.MibInstrumController(mibBuilder)
print('done')
print('Building table entry index from human-friendly representation...'),
snmpCommunityEntry, = mibBuilder.importSymbols(
'SNMP-COMMUNITY-MIB', 'snmpCommunityEntry'
)
instanceId = snmpCommunityEntry.getInstIdFromIndices('my-router')
print('done')
def cbFun(varBinds, **context):
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/update SNMP-COMMUNITY-MIB::snmpCommunityEntry table row: ')
mibInstrum.writeVars(
(snmpCommunityEntry.name + (2,) + instanceId, 'mycomm'),
(snmpCommunityEntry.name + (3,) + instanceId, 'mynmsname'),
(snmpCommunityEntry.name + (7,) + instanceId, 'volatile'),
cbFun=cbFun
)
print('done')
def cbFun(varBinds, **context):
for oid, val in varBinds:
if exval.endOfMib.isSameTypeWith(val):
context['state']['stop'] = True
print('%s = %s' % ('.'.join([str(x) for x in oid]), not val.isValue and 'N/A' or val.prettyPrint()))
context['state']['varBinds'] = varBinds
context = {
'cbFun': cbFun,
'state': {
'varBinds': [((1, 3, 6), None)],
'stop': False
}
}
print('Read whole MIB (table walk)')
while not context['state']['stop']:
mibInstrum.readNextVars(*context['state']['varBinds'], **context)
print('done')
print('Unloading MIB modules...'),
mibBuilder.unloadModules()
print('done')
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